spa.c revision 268126
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, 2014 by Delphix. All rights reserved. 25 * Copyright (c) 2013, 2014, Nexenta Systems, Inc. All rights reserved. 26 * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 27 */ 28 29/* 30 * SPA: Storage Pool Allocator 31 * 32 * This file contains all the routines used when modifying on-disk SPA state. 33 * This includes opening, importing, destroying, exporting a pool, and syncing a 34 * pool. 35 */ 36 37#include <sys/zfs_context.h> 38#include <sys/fm/fs/zfs.h> 39#include <sys/spa_impl.h> 40#include <sys/zio.h> 41#include <sys/zio_checksum.h> 42#include <sys/dmu.h> 43#include <sys/dmu_tx.h> 44#include <sys/zap.h> 45#include <sys/zil.h> 46#include <sys/ddt.h> 47#include <sys/vdev_impl.h> 48#include <sys/metaslab.h> 49#include <sys/metaslab_impl.h> 50#include <sys/uberblock_impl.h> 51#include <sys/txg.h> 52#include <sys/avl.h> 53#include <sys/dmu_traverse.h> 54#include <sys/dmu_objset.h> 55#include <sys/unique.h> 56#include <sys/dsl_pool.h> 57#include <sys/dsl_dataset.h> 58#include <sys/dsl_dir.h> 59#include <sys/dsl_prop.h> 60#include <sys/dsl_synctask.h> 61#include <sys/fs/zfs.h> 62#include <sys/arc.h> 63#include <sys/callb.h> 64#include <sys/spa_boot.h> 65#include <sys/zfs_ioctl.h> 66#include <sys/dsl_scan.h> 67#include <sys/dmu_send.h> 68#include <sys/dsl_destroy.h> 69#include <sys/dsl_userhold.h> 70#include <sys/zfeature.h> 71#include <sys/zvol.h> 72#include <sys/trim_map.h> 73 74#ifdef _KERNEL 75#include <sys/callb.h> 76#include <sys/cpupart.h> 77#include <sys/zone.h> 78#endif /* _KERNEL */ 79 80#include "zfs_prop.h" 81#include "zfs_comutil.h" 82 83/* Check hostid on import? */ 84static int check_hostid = 1; 85 86SYSCTL_DECL(_vfs_zfs); 87SYSCTL_INT(_vfs_zfs, OID_AUTO, check_hostid, CTLFLAG_RWTUN, &check_hostid, 0, 88 "Check hostid on import?"); 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 96typedef enum zti_modes { 97 ZTI_MODE_FIXED, /* value is # of threads (min 1) */ 98 ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */ 99 ZTI_MODE_NULL, /* don't create a taskq */ 100 ZTI_NMODES 101} zti_modes_t; 102 103#define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) } 104#define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 } 105#define ZTI_NULL { ZTI_MODE_NULL, 0, 0 } 106 107#define ZTI_N(n) ZTI_P(n, 1) 108#define ZTI_ONE ZTI_N(1) 109 110typedef struct zio_taskq_info { 111 zti_modes_t zti_mode; 112 uint_t zti_value; 113 uint_t zti_count; 114} zio_taskq_info_t; 115 116static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { 117 "issue", "issue_high", "intr", "intr_high" 118}; 119 120/* 121 * This table defines the taskq settings for each ZFS I/O type. When 122 * initializing a pool, we use this table to create an appropriately sized 123 * taskq. Some operations are low volume and therefore have a small, static 124 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE 125 * macros. Other operations process a large amount of data; the ZTI_BATCH 126 * macro causes us to create a taskq oriented for throughput. Some operations 127 * are so high frequency and short-lived that the taskq itself can become a a 128 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an 129 * additional degree of parallelism specified by the number of threads per- 130 * taskq and the number of taskqs; when dispatching an event in this case, the 131 * particular taskq is chosen at random. 132 * 133 * The different taskq priorities are to handle the different contexts (issue 134 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that 135 * need to be handled with minimum delay. 136 */ 137const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = { 138 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */ 139 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */ 140 { ZTI_N(8), ZTI_NULL, ZTI_P(12, 8), ZTI_NULL }, /* READ */ 141 { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */ 142 { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */ 143 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */ 144 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */ 145}; 146 147static void spa_sync_version(void *arg, dmu_tx_t *tx); 148static void spa_sync_props(void *arg, dmu_tx_t *tx); 149static boolean_t spa_has_active_shared_spare(spa_t *spa); 150static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config, 151 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 152 char **ereport); 153static void spa_vdev_resilver_done(spa_t *spa); 154 155uint_t zio_taskq_batch_pct = 75; /* 1 thread per cpu in pset */ 156#ifdef PSRSET_BIND 157id_t zio_taskq_psrset_bind = PS_NONE; 158#endif 159#ifdef SYSDC 160boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ 161#endif 162uint_t zio_taskq_basedc = 80; /* base duty cycle */ 163 164boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ 165extern int zfs_sync_pass_deferred_free; 166 167#ifndef illumos 168extern void spa_deadman(void *arg); 169#endif 170 171/* 172 * This (illegal) pool name is used when temporarily importing a spa_t in order 173 * to get the vdev stats associated with the imported devices. 174 */ 175#define TRYIMPORT_NAME "$import" 176 177/* 178 * ========================================================================== 179 * SPA properties routines 180 * ========================================================================== 181 */ 182 183/* 184 * Add a (source=src, propname=propval) list to an nvlist. 185 */ 186static void 187spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, 188 uint64_t intval, zprop_source_t src) 189{ 190 const char *propname = zpool_prop_to_name(prop); 191 nvlist_t *propval; 192 193 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); 194 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); 195 196 if (strval != NULL) 197 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); 198 else 199 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); 200 201 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); 202 nvlist_free(propval); 203} 204 205/* 206 * Get property values from the spa configuration. 207 */ 208static void 209spa_prop_get_config(spa_t *spa, nvlist_t **nvp) 210{ 211 vdev_t *rvd = spa->spa_root_vdev; 212 dsl_pool_t *pool = spa->spa_dsl_pool; 213 uint64_t size; 214 uint64_t alloc; 215 uint64_t space; 216 uint64_t cap, version; 217 zprop_source_t src = ZPROP_SRC_NONE; 218 spa_config_dirent_t *dp; 219 220 ASSERT(MUTEX_HELD(&spa->spa_props_lock)); 221 222 if (rvd != NULL) { 223 alloc = metaslab_class_get_alloc(spa_normal_class(spa)); 224 size = metaslab_class_get_space(spa_normal_class(spa)); 225 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); 226 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); 227 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); 228 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, 229 size - alloc, src); 230 231 space = 0; 232 for (int c = 0; c < rvd->vdev_children; c++) { 233 vdev_t *tvd = rvd->vdev_child[c]; 234 space += tvd->vdev_max_asize - tvd->vdev_asize; 235 } 236 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, space, 237 src); 238 239 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 pool->dp_free_dir->dd_phys->dd_used_bytes, src); 267 } else { 268 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, 269 NULL, 0, src); 270 } 271 272 if (pool->dp_leak_dir != NULL) { 273 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL, 274 pool->dp_leak_dir->dd_phys->dd_used_bytes, src); 275 } else { 276 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, 277 NULL, 0, src); 278 } 279 } 280 281 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); 282 283 if (spa->spa_comment != NULL) { 284 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, 285 0, ZPROP_SRC_LOCAL); 286 } 287 288 if (spa->spa_root != NULL) 289 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, 290 0, ZPROP_SRC_LOCAL); 291 292 if ((dp = list_head(&spa->spa_config_list)) != NULL) { 293 if (dp->scd_path == NULL) { 294 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 295 "none", 0, ZPROP_SRC_LOCAL); 296 } else if (strcmp(dp->scd_path, spa_config_path) != 0) { 297 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 298 dp->scd_path, 0, ZPROP_SRC_LOCAL); 299 } 300 } 301} 302 303/* 304 * Get zpool property values. 305 */ 306int 307spa_prop_get(spa_t *spa, nvlist_t **nvp) 308{ 309 objset_t *mos = spa->spa_meta_objset; 310 zap_cursor_t zc; 311 zap_attribute_t za; 312 int err; 313 314 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 315 316 mutex_enter(&spa->spa_props_lock); 317 318 /* 319 * Get properties from the spa config. 320 */ 321 spa_prop_get_config(spa, nvp); 322 323 /* If no pool property object, no more prop to get. */ 324 if (mos == NULL || spa->spa_pool_props_object == 0) { 325 mutex_exit(&spa->spa_props_lock); 326 return (0); 327 } 328 329 /* 330 * Get properties from the MOS pool property object. 331 */ 332 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); 333 (err = zap_cursor_retrieve(&zc, &za)) == 0; 334 zap_cursor_advance(&zc)) { 335 uint64_t intval = 0; 336 char *strval = NULL; 337 zprop_source_t src = ZPROP_SRC_DEFAULT; 338 zpool_prop_t prop; 339 340 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL) 341 continue; 342 343 switch (za.za_integer_length) { 344 case 8: 345 /* integer property */ 346 if (za.za_first_integer != 347 zpool_prop_default_numeric(prop)) 348 src = ZPROP_SRC_LOCAL; 349 350 if (prop == ZPOOL_PROP_BOOTFS) { 351 dsl_pool_t *dp; 352 dsl_dataset_t *ds = NULL; 353 354 dp = spa_get_dsl(spa); 355 dsl_pool_config_enter(dp, FTAG); 356 if (err = dsl_dataset_hold_obj(dp, 357 za.za_first_integer, FTAG, &ds)) { 358 dsl_pool_config_exit(dp, FTAG); 359 break; 360 } 361 362 strval = kmem_alloc( 363 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, 364 KM_SLEEP); 365 dsl_dataset_name(ds, strval); 366 dsl_dataset_rele(ds, FTAG); 367 dsl_pool_config_exit(dp, FTAG); 368 } else { 369 strval = NULL; 370 intval = za.za_first_integer; 371 } 372 373 spa_prop_add_list(*nvp, prop, strval, intval, src); 374 375 if (strval != NULL) 376 kmem_free(strval, 377 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); 378 379 break; 380 381 case 1: 382 /* string property */ 383 strval = kmem_alloc(za.za_num_integers, KM_SLEEP); 384 err = zap_lookup(mos, spa->spa_pool_props_object, 385 za.za_name, 1, za.za_num_integers, strval); 386 if (err) { 387 kmem_free(strval, za.za_num_integers); 388 break; 389 } 390 spa_prop_add_list(*nvp, prop, strval, 0, src); 391 kmem_free(strval, za.za_num_integers); 392 break; 393 394 default: 395 break; 396 } 397 } 398 zap_cursor_fini(&zc); 399 mutex_exit(&spa->spa_props_lock); 400out: 401 if (err && err != ENOENT) { 402 nvlist_free(*nvp); 403 *nvp = NULL; 404 return (err); 405 } 406 407 return (0); 408} 409 410/* 411 * Validate the given pool properties nvlist and modify the list 412 * for the property values to be set. 413 */ 414static int 415spa_prop_validate(spa_t *spa, nvlist_t *props) 416{ 417 nvpair_t *elem; 418 int error = 0, reset_bootfs = 0; 419 uint64_t objnum = 0; 420 boolean_t has_feature = B_FALSE; 421 422 elem = NULL; 423 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 424 uint64_t intval; 425 char *strval, *slash, *check, *fname; 426 const char *propname = nvpair_name(elem); 427 zpool_prop_t prop = zpool_name_to_prop(propname); 428 429 switch (prop) { 430 case ZPROP_INVAL: 431 if (!zpool_prop_feature(propname)) { 432 error = SET_ERROR(EINVAL); 433 break; 434 } 435 436 /* 437 * Sanitize the input. 438 */ 439 if (nvpair_type(elem) != DATA_TYPE_UINT64) { 440 error = SET_ERROR(EINVAL); 441 break; 442 } 443 444 if (nvpair_value_uint64(elem, &intval) != 0) { 445 error = SET_ERROR(EINVAL); 446 break; 447 } 448 449 if (intval != 0) { 450 error = SET_ERROR(EINVAL); 451 break; 452 } 453 454 fname = strchr(propname, '@') + 1; 455 if (zfeature_lookup_name(fname, NULL) != 0) { 456 error = SET_ERROR(EINVAL); 457 break; 458 } 459 460 has_feature = B_TRUE; 461 break; 462 463 case ZPOOL_PROP_VERSION: 464 error = nvpair_value_uint64(elem, &intval); 465 if (!error && 466 (intval < spa_version(spa) || 467 intval > SPA_VERSION_BEFORE_FEATURES || 468 has_feature)) 469 error = SET_ERROR(EINVAL); 470 break; 471 472 case ZPOOL_PROP_DELEGATION: 473 case ZPOOL_PROP_AUTOREPLACE: 474 case ZPOOL_PROP_LISTSNAPS: 475 case ZPOOL_PROP_AUTOEXPAND: 476 error = nvpair_value_uint64(elem, &intval); 477 if (!error && intval > 1) 478 error = SET_ERROR(EINVAL); 479 break; 480 481 case ZPOOL_PROP_BOOTFS: 482 /* 483 * If the pool version is less than SPA_VERSION_BOOTFS, 484 * or the pool is still being created (version == 0), 485 * the bootfs property cannot be set. 486 */ 487 if (spa_version(spa) < SPA_VERSION_BOOTFS) { 488 error = SET_ERROR(ENOTSUP); 489 break; 490 } 491 492 /* 493 * Make sure the vdev config is bootable 494 */ 495 if (!vdev_is_bootable(spa->spa_root_vdev)) { 496 error = SET_ERROR(ENOTSUP); 497 break; 498 } 499 500 reset_bootfs = 1; 501 502 error = nvpair_value_string(elem, &strval); 503 504 if (!error) { 505 objset_t *os; 506 uint64_t compress; 507 508 if (strval == NULL || strval[0] == '\0') { 509 objnum = zpool_prop_default_numeric( 510 ZPOOL_PROP_BOOTFS); 511 break; 512 } 513 514 if (error = dmu_objset_hold(strval, FTAG, &os)) 515 break; 516 517 /* Must be ZPL and not gzip compressed. */ 518 519 if (dmu_objset_type(os) != DMU_OST_ZFS) { 520 error = SET_ERROR(ENOTSUP); 521 } else if ((error = 522 dsl_prop_get_int_ds(dmu_objset_ds(os), 523 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 524 &compress)) == 0 && 525 !BOOTFS_COMPRESS_VALID(compress)) { 526 error = SET_ERROR(ENOTSUP); 527 } else { 528 objnum = dmu_objset_id(os); 529 } 530 dmu_objset_rele(os, FTAG); 531 } 532 break; 533 534 case ZPOOL_PROP_FAILUREMODE: 535 error = nvpair_value_uint64(elem, &intval); 536 if (!error && (intval < ZIO_FAILURE_MODE_WAIT || 537 intval > ZIO_FAILURE_MODE_PANIC)) 538 error = SET_ERROR(EINVAL); 539 540 /* 541 * This is a special case which only occurs when 542 * the pool has completely failed. This allows 543 * the user to change the in-core failmode property 544 * without syncing it out to disk (I/Os might 545 * currently be blocked). We do this by returning 546 * EIO to the caller (spa_prop_set) to trick it 547 * into thinking we encountered a property validation 548 * error. 549 */ 550 if (!error && spa_suspended(spa)) { 551 spa->spa_failmode = intval; 552 error = SET_ERROR(EIO); 553 } 554 break; 555 556 case ZPOOL_PROP_CACHEFILE: 557 if ((error = nvpair_value_string(elem, &strval)) != 0) 558 break; 559 560 if (strval[0] == '\0') 561 break; 562 563 if (strcmp(strval, "none") == 0) 564 break; 565 566 if (strval[0] != '/') { 567 error = SET_ERROR(EINVAL); 568 break; 569 } 570 571 slash = strrchr(strval, '/'); 572 ASSERT(slash != NULL); 573 574 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 575 strcmp(slash, "/..") == 0) 576 error = SET_ERROR(EINVAL); 577 break; 578 579 case ZPOOL_PROP_COMMENT: 580 if ((error = nvpair_value_string(elem, &strval)) != 0) 581 break; 582 for (check = strval; *check != '\0'; check++) { 583 /* 584 * The kernel doesn't have an easy isprint() 585 * check. For this kernel check, we merely 586 * check ASCII apart from DEL. Fix this if 587 * there is an easy-to-use kernel isprint(). 588 */ 589 if (*check >= 0x7f) { 590 error = SET_ERROR(EINVAL); 591 break; 592 } 593 check++; 594 } 595 if (strlen(strval) > ZPROP_MAX_COMMENT) 596 error = E2BIG; 597 break; 598 599 case ZPOOL_PROP_DEDUPDITTO: 600 if (spa_version(spa) < SPA_VERSION_DEDUP) 601 error = SET_ERROR(ENOTSUP); 602 else 603 error = nvpair_value_uint64(elem, &intval); 604 if (error == 0 && 605 intval != 0 && intval < ZIO_DEDUPDITTO_MIN) 606 error = SET_ERROR(EINVAL); 607 break; 608 } 609 610 if (error) 611 break; 612 } 613 614 if (!error && reset_bootfs) { 615 error = nvlist_remove(props, 616 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); 617 618 if (!error) { 619 error = nvlist_add_uint64(props, 620 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); 621 } 622 } 623 624 return (error); 625} 626 627void 628spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) 629{ 630 char *cachefile; 631 spa_config_dirent_t *dp; 632 633 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), 634 &cachefile) != 0) 635 return; 636 637 dp = kmem_alloc(sizeof (spa_config_dirent_t), 638 KM_SLEEP); 639 640 if (cachefile[0] == '\0') 641 dp->scd_path = spa_strdup(spa_config_path); 642 else if (strcmp(cachefile, "none") == 0) 643 dp->scd_path = NULL; 644 else 645 dp->scd_path = spa_strdup(cachefile); 646 647 list_insert_head(&spa->spa_config_list, dp); 648 if (need_sync) 649 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 650} 651 652int 653spa_prop_set(spa_t *spa, nvlist_t *nvp) 654{ 655 int error; 656 nvpair_t *elem = NULL; 657 boolean_t need_sync = B_FALSE; 658 659 if ((error = spa_prop_validate(spa, nvp)) != 0) 660 return (error); 661 662 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { 663 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); 664 665 if (prop == ZPOOL_PROP_CACHEFILE || 666 prop == ZPOOL_PROP_ALTROOT || 667 prop == ZPOOL_PROP_READONLY) 668 continue; 669 670 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) { 671 uint64_t ver; 672 673 if (prop == ZPOOL_PROP_VERSION) { 674 VERIFY(nvpair_value_uint64(elem, &ver) == 0); 675 } else { 676 ASSERT(zpool_prop_feature(nvpair_name(elem))); 677 ver = SPA_VERSION_FEATURES; 678 need_sync = B_TRUE; 679 } 680 681 /* Save time if the version is already set. */ 682 if (ver == spa_version(spa)) 683 continue; 684 685 /* 686 * In addition to the pool directory object, we might 687 * create the pool properties object, the features for 688 * read object, the features for write object, or the 689 * feature descriptions object. 690 */ 691 error = dsl_sync_task(spa->spa_name, NULL, 692 spa_sync_version, &ver, 6); 693 if (error) 694 return (error); 695 continue; 696 } 697 698 need_sync = B_TRUE; 699 break; 700 } 701 702 if (need_sync) { 703 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props, 704 nvp, 6)); 705 } 706 707 return (0); 708} 709 710/* 711 * If the bootfs property value is dsobj, clear it. 712 */ 713void 714spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) 715{ 716 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { 717 VERIFY(zap_remove(spa->spa_meta_objset, 718 spa->spa_pool_props_object, 719 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); 720 spa->spa_bootfs = 0; 721 } 722} 723 724/*ARGSUSED*/ 725static int 726spa_change_guid_check(void *arg, dmu_tx_t *tx) 727{ 728 uint64_t *newguid = arg; 729 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 730 vdev_t *rvd = spa->spa_root_vdev; 731 uint64_t vdev_state; 732 733 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 734 vdev_state = rvd->vdev_state; 735 spa_config_exit(spa, SCL_STATE, FTAG); 736 737 if (vdev_state != VDEV_STATE_HEALTHY) 738 return (SET_ERROR(ENXIO)); 739 740 ASSERT3U(spa_guid(spa), !=, *newguid); 741 742 return (0); 743} 744 745static void 746spa_change_guid_sync(void *arg, dmu_tx_t *tx) 747{ 748 uint64_t *newguid = arg; 749 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 750 uint64_t oldguid; 751 vdev_t *rvd = spa->spa_root_vdev; 752 753 oldguid = spa_guid(spa); 754 755 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 756 rvd->vdev_guid = *newguid; 757 rvd->vdev_guid_sum += (*newguid - oldguid); 758 vdev_config_dirty(rvd); 759 spa_config_exit(spa, SCL_STATE, FTAG); 760 761 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu", 762 oldguid, *newguid); 763} 764 765/* 766 * Change the GUID for the pool. This is done so that we can later 767 * re-import a pool built from a clone of our own vdevs. We will modify 768 * the root vdev's guid, our own pool guid, and then mark all of our 769 * vdevs dirty. Note that we must make sure that all our vdevs are 770 * online when we do this, or else any vdevs that weren't present 771 * would be orphaned from our pool. We are also going to issue a 772 * sysevent to update any watchers. 773 */ 774int 775spa_change_guid(spa_t *spa) 776{ 777 int error; 778 uint64_t guid; 779 780 mutex_enter(&spa->spa_vdev_top_lock); 781 mutex_enter(&spa_namespace_lock); 782 guid = spa_generate_guid(NULL); 783 784 error = dsl_sync_task(spa->spa_name, spa_change_guid_check, 785 spa_change_guid_sync, &guid, 5); 786 787 if (error == 0) { 788 spa_config_sync(spa, B_FALSE, B_TRUE); 789 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID); 790 } 791 792 mutex_exit(&spa_namespace_lock); 793 mutex_exit(&spa->spa_vdev_top_lock); 794 795 return (error); 796} 797 798/* 799 * ========================================================================== 800 * SPA state manipulation (open/create/destroy/import/export) 801 * ========================================================================== 802 */ 803 804static int 805spa_error_entry_compare(const void *a, const void *b) 806{ 807 spa_error_entry_t *sa = (spa_error_entry_t *)a; 808 spa_error_entry_t *sb = (spa_error_entry_t *)b; 809 int ret; 810 811 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, 812 sizeof (zbookmark_phys_t)); 813 814 if (ret < 0) 815 return (-1); 816 else if (ret > 0) 817 return (1); 818 else 819 return (0); 820} 821 822/* 823 * Utility function which retrieves copies of the current logs and 824 * re-initializes them in the process. 825 */ 826void 827spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 828{ 829 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); 830 831 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); 832 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); 833 834 avl_create(&spa->spa_errlist_scrub, 835 spa_error_entry_compare, sizeof (spa_error_entry_t), 836 offsetof(spa_error_entry_t, se_avl)); 837 avl_create(&spa->spa_errlist_last, 838 spa_error_entry_compare, sizeof (spa_error_entry_t), 839 offsetof(spa_error_entry_t, se_avl)); 840} 841 842static void 843spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 844{ 845 const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; 846 enum zti_modes mode = ztip->zti_mode; 847 uint_t value = ztip->zti_value; 848 uint_t count = ztip->zti_count; 849 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 850 char name[32]; 851 uint_t flags = 0; 852 boolean_t batch = B_FALSE; 853 854 if (mode == ZTI_MODE_NULL) { 855 tqs->stqs_count = 0; 856 tqs->stqs_taskq = NULL; 857 return; 858 } 859 860 ASSERT3U(count, >, 0); 861 862 tqs->stqs_count = count; 863 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP); 864 865 switch (mode) { 866 case ZTI_MODE_FIXED: 867 ASSERT3U(value, >=, 1); 868 value = MAX(value, 1); 869 break; 870 871 case ZTI_MODE_BATCH: 872 batch = B_TRUE; 873 flags |= TASKQ_THREADS_CPU_PCT; 874 value = zio_taskq_batch_pct; 875 break; 876 877 default: 878 panic("unrecognized mode for %s_%s taskq (%u:%u) in " 879 "spa_activate()", 880 zio_type_name[t], zio_taskq_types[q], mode, value); 881 break; 882 } 883 884 for (uint_t i = 0; i < count; i++) { 885 taskq_t *tq; 886 887 if (count > 1) { 888 (void) snprintf(name, sizeof (name), "%s_%s_%u", 889 zio_type_name[t], zio_taskq_types[q], i); 890 } else { 891 (void) snprintf(name, sizeof (name), "%s_%s", 892 zio_type_name[t], zio_taskq_types[q]); 893 } 894 895#ifdef SYSDC 896 if (zio_taskq_sysdc && spa->spa_proc != &p0) { 897 if (batch) 898 flags |= TASKQ_DC_BATCH; 899 900 tq = taskq_create_sysdc(name, value, 50, INT_MAX, 901 spa->spa_proc, zio_taskq_basedc, flags); 902 } else { 903#endif 904 pri_t pri = maxclsyspri; 905 /* 906 * The write issue taskq can be extremely CPU 907 * intensive. Run it at slightly lower priority 908 * than the other taskqs. 909 */ 910 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) 911 pri--; 912 913 tq = taskq_create_proc(name, value, pri, 50, 914 INT_MAX, spa->spa_proc, flags); 915#ifdef SYSDC 916 } 917#endif 918 919 tqs->stqs_taskq[i] = tq; 920 } 921} 922 923static void 924spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 925{ 926 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 927 928 if (tqs->stqs_taskq == NULL) { 929 ASSERT0(tqs->stqs_count); 930 return; 931 } 932 933 for (uint_t i = 0; i < tqs->stqs_count; i++) { 934 ASSERT3P(tqs->stqs_taskq[i], !=, NULL); 935 taskq_destroy(tqs->stqs_taskq[i]); 936 } 937 938 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *)); 939 tqs->stqs_taskq = NULL; 940} 941 942/* 943 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority. 944 * Note that a type may have multiple discrete taskqs to avoid lock contention 945 * on the taskq itself. In that case we choose which taskq at random by using 946 * the low bits of gethrtime(). 947 */ 948void 949spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 950 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent) 951{ 952 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 953 taskq_t *tq; 954 955 ASSERT3P(tqs->stqs_taskq, !=, NULL); 956 ASSERT3U(tqs->stqs_count, !=, 0); 957 958 if (tqs->stqs_count == 1) { 959 tq = tqs->stqs_taskq[0]; 960 } else { 961#ifdef _KERNEL 962 tq = tqs->stqs_taskq[cpu_ticks() % tqs->stqs_count]; 963#else 964 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 965#endif 966 } 967 968 taskq_dispatch_ent(tq, func, arg, flags, ent); 969} 970 971static void 972spa_create_zio_taskqs(spa_t *spa) 973{ 974 for (int t = 0; t < ZIO_TYPES; t++) { 975 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 976 spa_taskqs_init(spa, t, q); 977 } 978 } 979} 980 981#ifdef _KERNEL 982#ifdef SPA_PROCESS 983static void 984spa_thread(void *arg) 985{ 986 callb_cpr_t cprinfo; 987 988 spa_t *spa = arg; 989 user_t *pu = PTOU(curproc); 990 991 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 992 spa->spa_name); 993 994 ASSERT(curproc != &p0); 995 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 996 "zpool-%s", spa->spa_name); 997 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 998 999#ifdef PSRSET_BIND 1000 /* bind this thread to the requested psrset */ 1001 if (zio_taskq_psrset_bind != PS_NONE) { 1002 pool_lock(); 1003 mutex_enter(&cpu_lock); 1004 mutex_enter(&pidlock); 1005 mutex_enter(&curproc->p_lock); 1006 1007 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 1008 0, NULL, NULL) == 0) { 1009 curthread->t_bind_pset = zio_taskq_psrset_bind; 1010 } else { 1011 cmn_err(CE_WARN, 1012 "Couldn't bind process for zfs pool \"%s\" to " 1013 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1014 } 1015 1016 mutex_exit(&curproc->p_lock); 1017 mutex_exit(&pidlock); 1018 mutex_exit(&cpu_lock); 1019 pool_unlock(); 1020 } 1021#endif 1022 1023#ifdef SYSDC 1024 if (zio_taskq_sysdc) { 1025 sysdc_thread_enter(curthread, 100, 0); 1026 } 1027#endif 1028 1029 spa->spa_proc = curproc; 1030 spa->spa_did = curthread->t_did; 1031 1032 spa_create_zio_taskqs(spa); 1033 1034 mutex_enter(&spa->spa_proc_lock); 1035 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1036 1037 spa->spa_proc_state = SPA_PROC_ACTIVE; 1038 cv_broadcast(&spa->spa_proc_cv); 1039 1040 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1041 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1042 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1043 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1044 1045 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1046 spa->spa_proc_state = SPA_PROC_GONE; 1047 spa->spa_proc = &p0; 1048 cv_broadcast(&spa->spa_proc_cv); 1049 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1050 1051 mutex_enter(&curproc->p_lock); 1052 lwp_exit(); 1053} 1054#endif /* SPA_PROCESS */ 1055#endif 1056 1057/* 1058 * Activate an uninitialized pool. 1059 */ 1060static void 1061spa_activate(spa_t *spa, int mode) 1062{ 1063 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1064 1065 spa->spa_state = POOL_STATE_ACTIVE; 1066 spa->spa_mode = mode; 1067 1068 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1069 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1070 1071 /* Try to create a covering process */ 1072 mutex_enter(&spa->spa_proc_lock); 1073 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1074 ASSERT(spa->spa_proc == &p0); 1075 spa->spa_did = 0; 1076 1077#ifdef SPA_PROCESS 1078 /* Only create a process if we're going to be around a while. */ 1079 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1080 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1081 NULL, 0) == 0) { 1082 spa->spa_proc_state = SPA_PROC_CREATED; 1083 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1084 cv_wait(&spa->spa_proc_cv, 1085 &spa->spa_proc_lock); 1086 } 1087 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1088 ASSERT(spa->spa_proc != &p0); 1089 ASSERT(spa->spa_did != 0); 1090 } else { 1091#ifdef _KERNEL 1092 cmn_err(CE_WARN, 1093 "Couldn't create process for zfs pool \"%s\"\n", 1094 spa->spa_name); 1095#endif 1096 } 1097 } 1098#endif /* SPA_PROCESS */ 1099 mutex_exit(&spa->spa_proc_lock); 1100 1101 /* If we didn't create a process, we need to create our taskqs. */ 1102 ASSERT(spa->spa_proc == &p0); 1103 if (spa->spa_proc == &p0) { 1104 spa_create_zio_taskqs(spa); 1105 } 1106 1107 /* 1108 * Start TRIM thread. 1109 */ 1110 trim_thread_create(spa); 1111 1112 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1113 offsetof(vdev_t, vdev_config_dirty_node)); 1114 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1115 offsetof(vdev_t, vdev_state_dirty_node)); 1116 1117 txg_list_create(&spa->spa_vdev_txg_list, 1118 offsetof(struct vdev, vdev_txg_node)); 1119 1120 avl_create(&spa->spa_errlist_scrub, 1121 spa_error_entry_compare, sizeof (spa_error_entry_t), 1122 offsetof(spa_error_entry_t, se_avl)); 1123 avl_create(&spa->spa_errlist_last, 1124 spa_error_entry_compare, sizeof (spa_error_entry_t), 1125 offsetof(spa_error_entry_t, se_avl)); 1126} 1127 1128/* 1129 * Opposite of spa_activate(). 1130 */ 1131static void 1132spa_deactivate(spa_t *spa) 1133{ 1134 ASSERT(spa->spa_sync_on == B_FALSE); 1135 ASSERT(spa->spa_dsl_pool == NULL); 1136 ASSERT(spa->spa_root_vdev == NULL); 1137 ASSERT(spa->spa_async_zio_root == NULL); 1138 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1139 1140 /* 1141 * Stop TRIM thread in case spa_unload() wasn't called directly 1142 * before spa_deactivate(). 1143 */ 1144 trim_thread_destroy(spa); 1145 1146 txg_list_destroy(&spa->spa_vdev_txg_list); 1147 1148 list_destroy(&spa->spa_config_dirty_list); 1149 list_destroy(&spa->spa_state_dirty_list); 1150 1151 for (int t = 0; t < ZIO_TYPES; t++) { 1152 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1153 spa_taskqs_fini(spa, t, q); 1154 } 1155 } 1156 1157 metaslab_class_destroy(spa->spa_normal_class); 1158 spa->spa_normal_class = NULL; 1159 1160 metaslab_class_destroy(spa->spa_log_class); 1161 spa->spa_log_class = NULL; 1162 1163 /* 1164 * If this was part of an import or the open otherwise failed, we may 1165 * still have errors left in the queues. Empty them just in case. 1166 */ 1167 spa_errlog_drain(spa); 1168 1169 avl_destroy(&spa->spa_errlist_scrub); 1170 avl_destroy(&spa->spa_errlist_last); 1171 1172 spa->spa_state = POOL_STATE_UNINITIALIZED; 1173 1174 mutex_enter(&spa->spa_proc_lock); 1175 if (spa->spa_proc_state != SPA_PROC_NONE) { 1176 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1177 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1178 cv_broadcast(&spa->spa_proc_cv); 1179 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1180 ASSERT(spa->spa_proc != &p0); 1181 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1182 } 1183 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1184 spa->spa_proc_state = SPA_PROC_NONE; 1185 } 1186 ASSERT(spa->spa_proc == &p0); 1187 mutex_exit(&spa->spa_proc_lock); 1188 1189#ifdef SPA_PROCESS 1190 /* 1191 * We want to make sure spa_thread() has actually exited the ZFS 1192 * module, so that the module can't be unloaded out from underneath 1193 * it. 1194 */ 1195 if (spa->spa_did != 0) { 1196 thread_join(spa->spa_did); 1197 spa->spa_did = 0; 1198 } 1199#endif /* SPA_PROCESS */ 1200} 1201 1202/* 1203 * Verify a pool configuration, and construct the vdev tree appropriately. This 1204 * will create all the necessary vdevs in the appropriate layout, with each vdev 1205 * in the CLOSED state. This will prep the pool before open/creation/import. 1206 * All vdev validation is done by the vdev_alloc() routine. 1207 */ 1208static int 1209spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1210 uint_t id, int atype) 1211{ 1212 nvlist_t **child; 1213 uint_t children; 1214 int error; 1215 1216 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1217 return (error); 1218 1219 if ((*vdp)->vdev_ops->vdev_op_leaf) 1220 return (0); 1221 1222 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1223 &child, &children); 1224 1225 if (error == ENOENT) 1226 return (0); 1227 1228 if (error) { 1229 vdev_free(*vdp); 1230 *vdp = NULL; 1231 return (SET_ERROR(EINVAL)); 1232 } 1233 1234 for (int c = 0; c < children; c++) { 1235 vdev_t *vd; 1236 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1237 atype)) != 0) { 1238 vdev_free(*vdp); 1239 *vdp = NULL; 1240 return (error); 1241 } 1242 } 1243 1244 ASSERT(*vdp != NULL); 1245 1246 return (0); 1247} 1248 1249/* 1250 * Opposite of spa_load(). 1251 */ 1252static void 1253spa_unload(spa_t *spa) 1254{ 1255 int i; 1256 1257 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1258 1259 /* 1260 * Stop TRIM thread. 1261 */ 1262 trim_thread_destroy(spa); 1263 1264 /* 1265 * Stop async tasks. 1266 */ 1267 spa_async_suspend(spa); 1268 1269 /* 1270 * Stop syncing. 1271 */ 1272 if (spa->spa_sync_on) { 1273 txg_sync_stop(spa->spa_dsl_pool); 1274 spa->spa_sync_on = B_FALSE; 1275 } 1276 1277 /* 1278 * Wait for any outstanding async I/O to complete. 1279 */ 1280 if (spa->spa_async_zio_root != NULL) { 1281 (void) zio_wait(spa->spa_async_zio_root); 1282 spa->spa_async_zio_root = NULL; 1283 } 1284 1285 bpobj_close(&spa->spa_deferred_bpobj); 1286 1287 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1288 1289 /* 1290 * Close all vdevs. 1291 */ 1292 if (spa->spa_root_vdev) 1293 vdev_free(spa->spa_root_vdev); 1294 ASSERT(spa->spa_root_vdev == NULL); 1295 1296 /* 1297 * Close the dsl pool. 1298 */ 1299 if (spa->spa_dsl_pool) { 1300 dsl_pool_close(spa->spa_dsl_pool); 1301 spa->spa_dsl_pool = NULL; 1302 spa->spa_meta_objset = NULL; 1303 } 1304 1305 ddt_unload(spa); 1306 1307 1308 /* 1309 * Drop and purge level 2 cache 1310 */ 1311 spa_l2cache_drop(spa); 1312 1313 for (i = 0; i < spa->spa_spares.sav_count; i++) 1314 vdev_free(spa->spa_spares.sav_vdevs[i]); 1315 if (spa->spa_spares.sav_vdevs) { 1316 kmem_free(spa->spa_spares.sav_vdevs, 1317 spa->spa_spares.sav_count * sizeof (void *)); 1318 spa->spa_spares.sav_vdevs = NULL; 1319 } 1320 if (spa->spa_spares.sav_config) { 1321 nvlist_free(spa->spa_spares.sav_config); 1322 spa->spa_spares.sav_config = NULL; 1323 } 1324 spa->spa_spares.sav_count = 0; 1325 1326 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1327 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1328 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1329 } 1330 if (spa->spa_l2cache.sav_vdevs) { 1331 kmem_free(spa->spa_l2cache.sav_vdevs, 1332 spa->spa_l2cache.sav_count * sizeof (void *)); 1333 spa->spa_l2cache.sav_vdevs = NULL; 1334 } 1335 if (spa->spa_l2cache.sav_config) { 1336 nvlist_free(spa->spa_l2cache.sav_config); 1337 spa->spa_l2cache.sav_config = NULL; 1338 } 1339 spa->spa_l2cache.sav_count = 0; 1340 1341 spa->spa_async_suspended = 0; 1342 1343 if (spa->spa_comment != NULL) { 1344 spa_strfree(spa->spa_comment); 1345 spa->spa_comment = NULL; 1346 } 1347 1348 spa_config_exit(spa, SCL_ALL, FTAG); 1349} 1350 1351/* 1352 * Load (or re-load) the current list of vdevs describing the active spares for 1353 * this pool. When this is called, we have some form of basic information in 1354 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1355 * then re-generate a more complete list including status information. 1356 */ 1357static void 1358spa_load_spares(spa_t *spa) 1359{ 1360 nvlist_t **spares; 1361 uint_t nspares; 1362 int i; 1363 vdev_t *vd, *tvd; 1364 1365 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1366 1367 /* 1368 * First, close and free any existing spare vdevs. 1369 */ 1370 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1371 vd = spa->spa_spares.sav_vdevs[i]; 1372 1373 /* Undo the call to spa_activate() below */ 1374 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1375 B_FALSE)) != NULL && tvd->vdev_isspare) 1376 spa_spare_remove(tvd); 1377 vdev_close(vd); 1378 vdev_free(vd); 1379 } 1380 1381 if (spa->spa_spares.sav_vdevs) 1382 kmem_free(spa->spa_spares.sav_vdevs, 1383 spa->spa_spares.sav_count * sizeof (void *)); 1384 1385 if (spa->spa_spares.sav_config == NULL) 1386 nspares = 0; 1387 else 1388 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1389 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1390 1391 spa->spa_spares.sav_count = (int)nspares; 1392 spa->spa_spares.sav_vdevs = NULL; 1393 1394 if (nspares == 0) 1395 return; 1396 1397 /* 1398 * Construct the array of vdevs, opening them to get status in the 1399 * process. For each spare, there is potentially two different vdev_t 1400 * structures associated with it: one in the list of spares (used only 1401 * for basic validation purposes) and one in the active vdev 1402 * configuration (if it's spared in). During this phase we open and 1403 * validate each vdev on the spare list. If the vdev also exists in the 1404 * active configuration, then we also mark this vdev as an active spare. 1405 */ 1406 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1407 KM_SLEEP); 1408 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1409 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1410 VDEV_ALLOC_SPARE) == 0); 1411 ASSERT(vd != NULL); 1412 1413 spa->spa_spares.sav_vdevs[i] = vd; 1414 1415 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1416 B_FALSE)) != NULL) { 1417 if (!tvd->vdev_isspare) 1418 spa_spare_add(tvd); 1419 1420 /* 1421 * We only mark the spare active if we were successfully 1422 * able to load the vdev. Otherwise, importing a pool 1423 * with a bad active spare would result in strange 1424 * behavior, because multiple pool would think the spare 1425 * is actively in use. 1426 * 1427 * There is a vulnerability here to an equally bizarre 1428 * circumstance, where a dead active spare is later 1429 * brought back to life (onlined or otherwise). Given 1430 * the rarity of this scenario, and the extra complexity 1431 * it adds, we ignore the possibility. 1432 */ 1433 if (!vdev_is_dead(tvd)) 1434 spa_spare_activate(tvd); 1435 } 1436 1437 vd->vdev_top = vd; 1438 vd->vdev_aux = &spa->spa_spares; 1439 1440 if (vdev_open(vd) != 0) 1441 continue; 1442 1443 if (vdev_validate_aux(vd) == 0) 1444 spa_spare_add(vd); 1445 } 1446 1447 /* 1448 * Recompute the stashed list of spares, with status information 1449 * this time. 1450 */ 1451 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1452 DATA_TYPE_NVLIST_ARRAY) == 0); 1453 1454 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1455 KM_SLEEP); 1456 for (i = 0; i < spa->spa_spares.sav_count; i++) 1457 spares[i] = vdev_config_generate(spa, 1458 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1459 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1460 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1461 for (i = 0; i < spa->spa_spares.sav_count; i++) 1462 nvlist_free(spares[i]); 1463 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1464} 1465 1466/* 1467 * Load (or re-load) the current list of vdevs describing the active l2cache for 1468 * this pool. When this is called, we have some form of basic information in 1469 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1470 * then re-generate a more complete list including status information. 1471 * Devices which are already active have their details maintained, and are 1472 * not re-opened. 1473 */ 1474static void 1475spa_load_l2cache(spa_t *spa) 1476{ 1477 nvlist_t **l2cache; 1478 uint_t nl2cache; 1479 int i, j, oldnvdevs; 1480 uint64_t guid; 1481 vdev_t *vd, **oldvdevs, **newvdevs; 1482 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1483 1484 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1485 1486 if (sav->sav_config != NULL) { 1487 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1488 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1489 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1490 } else { 1491 nl2cache = 0; 1492 newvdevs = NULL; 1493 } 1494 1495 oldvdevs = sav->sav_vdevs; 1496 oldnvdevs = sav->sav_count; 1497 sav->sav_vdevs = NULL; 1498 sav->sav_count = 0; 1499 1500 /* 1501 * Process new nvlist of vdevs. 1502 */ 1503 for (i = 0; i < nl2cache; i++) { 1504 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1505 &guid) == 0); 1506 1507 newvdevs[i] = NULL; 1508 for (j = 0; j < oldnvdevs; j++) { 1509 vd = oldvdevs[j]; 1510 if (vd != NULL && guid == vd->vdev_guid) { 1511 /* 1512 * Retain previous vdev for add/remove ops. 1513 */ 1514 newvdevs[i] = vd; 1515 oldvdevs[j] = NULL; 1516 break; 1517 } 1518 } 1519 1520 if (newvdevs[i] == NULL) { 1521 /* 1522 * Create new vdev 1523 */ 1524 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1525 VDEV_ALLOC_L2CACHE) == 0); 1526 ASSERT(vd != NULL); 1527 newvdevs[i] = vd; 1528 1529 /* 1530 * Commit this vdev as an l2cache device, 1531 * even if it fails to open. 1532 */ 1533 spa_l2cache_add(vd); 1534 1535 vd->vdev_top = vd; 1536 vd->vdev_aux = sav; 1537 1538 spa_l2cache_activate(vd); 1539 1540 if (vdev_open(vd) != 0) 1541 continue; 1542 1543 (void) vdev_validate_aux(vd); 1544 1545 if (!vdev_is_dead(vd)) 1546 l2arc_add_vdev(spa, vd); 1547 } 1548 } 1549 1550 /* 1551 * Purge vdevs that were dropped 1552 */ 1553 for (i = 0; i < oldnvdevs; i++) { 1554 uint64_t pool; 1555 1556 vd = oldvdevs[i]; 1557 if (vd != NULL) { 1558 ASSERT(vd->vdev_isl2cache); 1559 1560 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1561 pool != 0ULL && l2arc_vdev_present(vd)) 1562 l2arc_remove_vdev(vd); 1563 vdev_clear_stats(vd); 1564 vdev_free(vd); 1565 } 1566 } 1567 1568 if (oldvdevs) 1569 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1570 1571 if (sav->sav_config == NULL) 1572 goto out; 1573 1574 sav->sav_vdevs = newvdevs; 1575 sav->sav_count = (int)nl2cache; 1576 1577 /* 1578 * Recompute the stashed list of l2cache devices, with status 1579 * information this time. 1580 */ 1581 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1582 DATA_TYPE_NVLIST_ARRAY) == 0); 1583 1584 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1585 for (i = 0; i < sav->sav_count; i++) 1586 l2cache[i] = vdev_config_generate(spa, 1587 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1588 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1589 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1590out: 1591 for (i = 0; i < sav->sav_count; i++) 1592 nvlist_free(l2cache[i]); 1593 if (sav->sav_count) 1594 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1595} 1596 1597static int 1598load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1599{ 1600 dmu_buf_t *db; 1601 char *packed = NULL; 1602 size_t nvsize = 0; 1603 int error; 1604 *value = NULL; 1605 1606 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1607 if (error != 0) 1608 return (error); 1609 nvsize = *(uint64_t *)db->db_data; 1610 dmu_buf_rele(db, FTAG); 1611 1612 packed = kmem_alloc(nvsize, KM_SLEEP); 1613 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1614 DMU_READ_PREFETCH); 1615 if (error == 0) 1616 error = nvlist_unpack(packed, nvsize, value, 0); 1617 kmem_free(packed, nvsize); 1618 1619 return (error); 1620} 1621 1622/* 1623 * Checks to see if the given vdev could not be opened, in which case we post a 1624 * sysevent to notify the autoreplace code that the device has been removed. 1625 */ 1626static void 1627spa_check_removed(vdev_t *vd) 1628{ 1629 for (int c = 0; c < vd->vdev_children; c++) 1630 spa_check_removed(vd->vdev_child[c]); 1631 1632 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1633 !vd->vdev_ishole) { 1634 zfs_post_autoreplace(vd->vdev_spa, vd); 1635 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); 1636 } 1637} 1638 1639/* 1640 * Validate the current config against the MOS config 1641 */ 1642static boolean_t 1643spa_config_valid(spa_t *spa, nvlist_t *config) 1644{ 1645 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 1646 nvlist_t *nv; 1647 1648 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); 1649 1650 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1651 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 1652 1653 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); 1654 1655 /* 1656 * If we're doing a normal import, then build up any additional 1657 * diagnostic information about missing devices in this config. 1658 * We'll pass this up to the user for further processing. 1659 */ 1660 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1661 nvlist_t **child, *nv; 1662 uint64_t idx = 0; 1663 1664 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1665 KM_SLEEP); 1666 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1667 1668 for (int c = 0; c < rvd->vdev_children; c++) { 1669 vdev_t *tvd = rvd->vdev_child[c]; 1670 vdev_t *mtvd = mrvd->vdev_child[c]; 1671 1672 if (tvd->vdev_ops == &vdev_missing_ops && 1673 mtvd->vdev_ops != &vdev_missing_ops && 1674 mtvd->vdev_islog) 1675 child[idx++] = vdev_config_generate(spa, mtvd, 1676 B_FALSE, 0); 1677 } 1678 1679 if (idx) { 1680 VERIFY(nvlist_add_nvlist_array(nv, 1681 ZPOOL_CONFIG_CHILDREN, child, idx) == 0); 1682 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 1683 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); 1684 1685 for (int i = 0; i < idx; i++) 1686 nvlist_free(child[i]); 1687 } 1688 nvlist_free(nv); 1689 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1690 } 1691 1692 /* 1693 * Compare the root vdev tree with the information we have 1694 * from the MOS config (mrvd). Check each top-level vdev 1695 * with the corresponding MOS config top-level (mtvd). 1696 */ 1697 for (int c = 0; c < rvd->vdev_children; c++) { 1698 vdev_t *tvd = rvd->vdev_child[c]; 1699 vdev_t *mtvd = mrvd->vdev_child[c]; 1700 1701 /* 1702 * Resolve any "missing" vdevs in the current configuration. 1703 * If we find that the MOS config has more accurate information 1704 * about the top-level vdev then use that vdev instead. 1705 */ 1706 if (tvd->vdev_ops == &vdev_missing_ops && 1707 mtvd->vdev_ops != &vdev_missing_ops) { 1708 1709 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) 1710 continue; 1711 1712 /* 1713 * Device specific actions. 1714 */ 1715 if (mtvd->vdev_islog) { 1716 spa_set_log_state(spa, SPA_LOG_CLEAR); 1717 } else { 1718 /* 1719 * XXX - once we have 'readonly' pool 1720 * support we should be able to handle 1721 * missing data devices by transitioning 1722 * the pool to readonly. 1723 */ 1724 continue; 1725 } 1726 1727 /* 1728 * Swap the missing vdev with the data we were 1729 * able to obtain from the MOS config. 1730 */ 1731 vdev_remove_child(rvd, tvd); 1732 vdev_remove_child(mrvd, mtvd); 1733 1734 vdev_add_child(rvd, mtvd); 1735 vdev_add_child(mrvd, tvd); 1736 1737 spa_config_exit(spa, SCL_ALL, FTAG); 1738 vdev_load(mtvd); 1739 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1740 1741 vdev_reopen(rvd); 1742 } else if (mtvd->vdev_islog) { 1743 /* 1744 * Load the slog device's state from the MOS config 1745 * since it's possible that the label does not 1746 * contain the most up-to-date information. 1747 */ 1748 vdev_load_log_state(tvd, mtvd); 1749 vdev_reopen(tvd); 1750 } 1751 } 1752 vdev_free(mrvd); 1753 spa_config_exit(spa, SCL_ALL, FTAG); 1754 1755 /* 1756 * Ensure we were able to validate the config. 1757 */ 1758 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); 1759} 1760 1761/* 1762 * Check for missing log devices 1763 */ 1764static boolean_t 1765spa_check_logs(spa_t *spa) 1766{ 1767 boolean_t rv = B_FALSE; 1768 1769 switch (spa->spa_log_state) { 1770 case SPA_LOG_MISSING: 1771 /* need to recheck in case slog has been restored */ 1772 case SPA_LOG_UNKNOWN: 1773 rv = (dmu_objset_find(spa->spa_name, zil_check_log_chain, 1774 NULL, DS_FIND_CHILDREN) != 0); 1775 if (rv) 1776 spa_set_log_state(spa, SPA_LOG_MISSING); 1777 break; 1778 } 1779 return (rv); 1780} 1781 1782static boolean_t 1783spa_passivate_log(spa_t *spa) 1784{ 1785 vdev_t *rvd = spa->spa_root_vdev; 1786 boolean_t slog_found = B_FALSE; 1787 1788 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1789 1790 if (!spa_has_slogs(spa)) 1791 return (B_FALSE); 1792 1793 for (int c = 0; c < rvd->vdev_children; c++) { 1794 vdev_t *tvd = rvd->vdev_child[c]; 1795 metaslab_group_t *mg = tvd->vdev_mg; 1796 1797 if (tvd->vdev_islog) { 1798 metaslab_group_passivate(mg); 1799 slog_found = B_TRUE; 1800 } 1801 } 1802 1803 return (slog_found); 1804} 1805 1806static void 1807spa_activate_log(spa_t *spa) 1808{ 1809 vdev_t *rvd = spa->spa_root_vdev; 1810 1811 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1812 1813 for (int c = 0; c < rvd->vdev_children; c++) { 1814 vdev_t *tvd = rvd->vdev_child[c]; 1815 metaslab_group_t *mg = tvd->vdev_mg; 1816 1817 if (tvd->vdev_islog) 1818 metaslab_group_activate(mg); 1819 } 1820} 1821 1822int 1823spa_offline_log(spa_t *spa) 1824{ 1825 int error; 1826 1827 error = dmu_objset_find(spa_name(spa), zil_vdev_offline, 1828 NULL, DS_FIND_CHILDREN); 1829 if (error == 0) { 1830 /* 1831 * We successfully offlined the log device, sync out the 1832 * current txg so that the "stubby" block can be removed 1833 * by zil_sync(). 1834 */ 1835 txg_wait_synced(spa->spa_dsl_pool, 0); 1836 } 1837 return (error); 1838} 1839 1840static void 1841spa_aux_check_removed(spa_aux_vdev_t *sav) 1842{ 1843 int i; 1844 1845 for (i = 0; i < sav->sav_count; i++) 1846 spa_check_removed(sav->sav_vdevs[i]); 1847} 1848 1849void 1850spa_claim_notify(zio_t *zio) 1851{ 1852 spa_t *spa = zio->io_spa; 1853 1854 if (zio->io_error) 1855 return; 1856 1857 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1858 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1859 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1860 mutex_exit(&spa->spa_props_lock); 1861} 1862 1863typedef struct spa_load_error { 1864 uint64_t sle_meta_count; 1865 uint64_t sle_data_count; 1866} spa_load_error_t; 1867 1868static void 1869spa_load_verify_done(zio_t *zio) 1870{ 1871 blkptr_t *bp = zio->io_bp; 1872 spa_load_error_t *sle = zio->io_private; 1873 dmu_object_type_t type = BP_GET_TYPE(bp); 1874 int error = zio->io_error; 1875 1876 if (error) { 1877 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 1878 type != DMU_OT_INTENT_LOG) 1879 atomic_add_64(&sle->sle_meta_count, 1); 1880 else 1881 atomic_add_64(&sle->sle_data_count, 1); 1882 } 1883 zio_data_buf_free(zio->io_data, zio->io_size); 1884} 1885 1886/*ARGSUSED*/ 1887static int 1888spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1889 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 1890{ 1891 if (!BP_IS_HOLE(bp) && !BP_IS_EMBEDDED(bp)) { 1892 zio_t *rio = arg; 1893 size_t size = BP_GET_PSIZE(bp); 1894 void *data = zio_data_buf_alloc(size); 1895 1896 zio_nowait(zio_read(rio, spa, bp, data, size, 1897 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 1898 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 1899 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 1900 } 1901 return (0); 1902} 1903 1904static int 1905spa_load_verify(spa_t *spa) 1906{ 1907 zio_t *rio; 1908 spa_load_error_t sle = { 0 }; 1909 zpool_rewind_policy_t policy; 1910 boolean_t verify_ok = B_FALSE; 1911 int error; 1912 1913 zpool_get_rewind_policy(spa->spa_config, &policy); 1914 1915 if (policy.zrp_request & ZPOOL_NEVER_REWIND) 1916 return (0); 1917 1918 rio = zio_root(spa, NULL, &sle, 1919 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1920 1921 error = traverse_pool(spa, spa->spa_verify_min_txg, 1922 TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio); 1923 1924 (void) zio_wait(rio); 1925 1926 spa->spa_load_meta_errors = sle.sle_meta_count; 1927 spa->spa_load_data_errors = sle.sle_data_count; 1928 1929 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && 1930 sle.sle_data_count <= policy.zrp_maxdata) { 1931 int64_t loss = 0; 1932 1933 verify_ok = B_TRUE; 1934 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 1935 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 1936 1937 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 1938 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1939 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 1940 VERIFY(nvlist_add_int64(spa->spa_load_info, 1941 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 1942 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1943 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 1944 } else { 1945 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 1946 } 1947 1948 if (error) { 1949 if (error != ENXIO && error != EIO) 1950 error = SET_ERROR(EIO); 1951 return (error); 1952 } 1953 1954 return (verify_ok ? 0 : EIO); 1955} 1956 1957/* 1958 * Find a value in the pool props object. 1959 */ 1960static void 1961spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 1962{ 1963 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 1964 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 1965} 1966 1967/* 1968 * Find a value in the pool directory object. 1969 */ 1970static int 1971spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) 1972{ 1973 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 1974 name, sizeof (uint64_t), 1, val)); 1975} 1976 1977static int 1978spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 1979{ 1980 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 1981 return (err); 1982} 1983 1984/* 1985 * Fix up config after a partly-completed split. This is done with the 1986 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 1987 * pool have that entry in their config, but only the splitting one contains 1988 * a list of all the guids of the vdevs that are being split off. 1989 * 1990 * This function determines what to do with that list: either rejoin 1991 * all the disks to the pool, or complete the splitting process. To attempt 1992 * the rejoin, each disk that is offlined is marked online again, and 1993 * we do a reopen() call. If the vdev label for every disk that was 1994 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 1995 * then we call vdev_split() on each disk, and complete the split. 1996 * 1997 * Otherwise we leave the config alone, with all the vdevs in place in 1998 * the original pool. 1999 */ 2000static void 2001spa_try_repair(spa_t *spa, nvlist_t *config) 2002{ 2003 uint_t extracted; 2004 uint64_t *glist; 2005 uint_t i, gcount; 2006 nvlist_t *nvl; 2007 vdev_t **vd; 2008 boolean_t attempt_reopen; 2009 2010 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2011 return; 2012 2013 /* check that the config is complete */ 2014 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2015 &glist, &gcount) != 0) 2016 return; 2017 2018 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2019 2020 /* attempt to online all the vdevs & validate */ 2021 attempt_reopen = B_TRUE; 2022 for (i = 0; i < gcount; i++) { 2023 if (glist[i] == 0) /* vdev is hole */ 2024 continue; 2025 2026 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2027 if (vd[i] == NULL) { 2028 /* 2029 * Don't bother attempting to reopen the disks; 2030 * just do the split. 2031 */ 2032 attempt_reopen = B_FALSE; 2033 } else { 2034 /* attempt to re-online it */ 2035 vd[i]->vdev_offline = B_FALSE; 2036 } 2037 } 2038 2039 if (attempt_reopen) { 2040 vdev_reopen(spa->spa_root_vdev); 2041 2042 /* check each device to see what state it's in */ 2043 for (extracted = 0, i = 0; i < gcount; i++) { 2044 if (vd[i] != NULL && 2045 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2046 break; 2047 ++extracted; 2048 } 2049 } 2050 2051 /* 2052 * If every disk has been moved to the new pool, or if we never 2053 * even attempted to look at them, then we split them off for 2054 * good. 2055 */ 2056 if (!attempt_reopen || gcount == extracted) { 2057 for (i = 0; i < gcount; i++) 2058 if (vd[i] != NULL) 2059 vdev_split(vd[i]); 2060 vdev_reopen(spa->spa_root_vdev); 2061 } 2062 2063 kmem_free(vd, gcount * sizeof (vdev_t *)); 2064} 2065 2066static int 2067spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, 2068 boolean_t mosconfig) 2069{ 2070 nvlist_t *config = spa->spa_config; 2071 char *ereport = FM_EREPORT_ZFS_POOL; 2072 char *comment; 2073 int error; 2074 uint64_t pool_guid; 2075 nvlist_t *nvl; 2076 2077 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) 2078 return (SET_ERROR(EINVAL)); 2079 2080 ASSERT(spa->spa_comment == NULL); 2081 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2082 spa->spa_comment = spa_strdup(comment); 2083 2084 /* 2085 * Versioning wasn't explicitly added to the label until later, so if 2086 * it's not present treat it as the initial version. 2087 */ 2088 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2089 &spa->spa_ubsync.ub_version) != 0) 2090 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2091 2092 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2093 &spa->spa_config_txg); 2094 2095 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && 2096 spa_guid_exists(pool_guid, 0)) { 2097 error = SET_ERROR(EEXIST); 2098 } else { 2099 spa->spa_config_guid = pool_guid; 2100 2101 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, 2102 &nvl) == 0) { 2103 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, 2104 KM_SLEEP) == 0); 2105 } 2106 2107 nvlist_free(spa->spa_load_info); 2108 spa->spa_load_info = fnvlist_alloc(); 2109 2110 gethrestime(&spa->spa_loaded_ts); 2111 error = spa_load_impl(spa, pool_guid, config, state, type, 2112 mosconfig, &ereport); 2113 } 2114 2115 spa->spa_minref = refcount_count(&spa->spa_refcount); 2116 if (error) { 2117 if (error != EEXIST) { 2118 spa->spa_loaded_ts.tv_sec = 0; 2119 spa->spa_loaded_ts.tv_nsec = 0; 2120 } 2121 if (error != EBADF) { 2122 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); 2123 } 2124 } 2125 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2126 spa->spa_ena = 0; 2127 2128 return (error); 2129} 2130 2131/* 2132 * Load an existing storage pool, using the pool's builtin spa_config as a 2133 * source of configuration information. 2134 */ 2135static int 2136spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, 2137 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 2138 char **ereport) 2139{ 2140 int error = 0; 2141 nvlist_t *nvroot = NULL; 2142 nvlist_t *label; 2143 vdev_t *rvd; 2144 uberblock_t *ub = &spa->spa_uberblock; 2145 uint64_t children, config_cache_txg = spa->spa_config_txg; 2146 int orig_mode = spa->spa_mode; 2147 int parse; 2148 uint64_t obj; 2149 boolean_t missing_feat_write = B_FALSE; 2150 2151 /* 2152 * If this is an untrusted config, access the pool in read-only mode. 2153 * This prevents things like resilvering recently removed devices. 2154 */ 2155 if (!mosconfig) 2156 spa->spa_mode = FREAD; 2157 2158 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2159 2160 spa->spa_load_state = state; 2161 2162 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) 2163 return (SET_ERROR(EINVAL)); 2164 2165 parse = (type == SPA_IMPORT_EXISTING ? 2166 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2167 2168 /* 2169 * Create "The Godfather" zio to hold all async IOs 2170 */ 2171 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 2172 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 2173 2174 /* 2175 * Parse the configuration into a vdev tree. We explicitly set the 2176 * value that will be returned by spa_version() since parsing the 2177 * configuration requires knowing the version number. 2178 */ 2179 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2180 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); 2181 spa_config_exit(spa, SCL_ALL, FTAG); 2182 2183 if (error != 0) 2184 return (error); 2185 2186 ASSERT(spa->spa_root_vdev == rvd); 2187 2188 if (type != SPA_IMPORT_ASSEMBLE) { 2189 ASSERT(spa_guid(spa) == pool_guid); 2190 } 2191 2192 /* 2193 * Try to open all vdevs, loading each label in the process. 2194 */ 2195 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2196 error = vdev_open(rvd); 2197 spa_config_exit(spa, SCL_ALL, FTAG); 2198 if (error != 0) 2199 return (error); 2200 2201 /* 2202 * We need to validate the vdev labels against the configuration that 2203 * we have in hand, which is dependent on the setting of mosconfig. If 2204 * mosconfig is true then we're validating the vdev labels based on 2205 * that config. Otherwise, we're validating against the cached config 2206 * (zpool.cache) that was read when we loaded the zfs module, and then 2207 * later we will recursively call spa_load() and validate against 2208 * the vdev config. 2209 * 2210 * If we're assembling a new pool that's been split off from an 2211 * existing pool, the labels haven't yet been updated so we skip 2212 * validation for now. 2213 */ 2214 if (type != SPA_IMPORT_ASSEMBLE) { 2215 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2216 error = vdev_validate(rvd, mosconfig); 2217 spa_config_exit(spa, SCL_ALL, FTAG); 2218 2219 if (error != 0) 2220 return (error); 2221 2222 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2223 return (SET_ERROR(ENXIO)); 2224 } 2225 2226 /* 2227 * Find the best uberblock. 2228 */ 2229 vdev_uberblock_load(rvd, ub, &label); 2230 2231 /* 2232 * If we weren't able to find a single valid uberblock, return failure. 2233 */ 2234 if (ub->ub_txg == 0) { 2235 nvlist_free(label); 2236 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2237 } 2238 2239 /* 2240 * If the pool has an unsupported version we can't open it. 2241 */ 2242 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2243 nvlist_free(label); 2244 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2245 } 2246 2247 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2248 nvlist_t *features; 2249 2250 /* 2251 * If we weren't able to find what's necessary for reading the 2252 * MOS in the label, return failure. 2253 */ 2254 if (label == NULL || nvlist_lookup_nvlist(label, 2255 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { 2256 nvlist_free(label); 2257 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2258 ENXIO)); 2259 } 2260 2261 /* 2262 * Update our in-core representation with the definitive values 2263 * from the label. 2264 */ 2265 nvlist_free(spa->spa_label_features); 2266 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2267 } 2268 2269 nvlist_free(label); 2270 2271 /* 2272 * Look through entries in the label nvlist's features_for_read. If 2273 * there is a feature listed there which we don't understand then we 2274 * cannot open a pool. 2275 */ 2276 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2277 nvlist_t *unsup_feat; 2278 2279 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2280 0); 2281 2282 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2283 NULL); nvp != NULL; 2284 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2285 if (!zfeature_is_supported(nvpair_name(nvp))) { 2286 VERIFY(nvlist_add_string(unsup_feat, 2287 nvpair_name(nvp), "") == 0); 2288 } 2289 } 2290 2291 if (!nvlist_empty(unsup_feat)) { 2292 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2293 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2294 nvlist_free(unsup_feat); 2295 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2296 ENOTSUP)); 2297 } 2298 2299 nvlist_free(unsup_feat); 2300 } 2301 2302 /* 2303 * If the vdev guid sum doesn't match the uberblock, we have an 2304 * incomplete configuration. We first check to see if the pool 2305 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). 2306 * If it is, defer the vdev_guid_sum check till later so we 2307 * can handle missing vdevs. 2308 */ 2309 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, 2310 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && 2311 rvd->vdev_guid_sum != ub->ub_guid_sum) 2312 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 2313 2314 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2315 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2316 spa_try_repair(spa, config); 2317 spa_config_exit(spa, SCL_ALL, FTAG); 2318 nvlist_free(spa->spa_config_splitting); 2319 spa->spa_config_splitting = NULL; 2320 } 2321 2322 /* 2323 * Initialize internal SPA structures. 2324 */ 2325 spa->spa_state = POOL_STATE_ACTIVE; 2326 spa->spa_ubsync = spa->spa_uberblock; 2327 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2328 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2329 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2330 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2331 spa->spa_claim_max_txg = spa->spa_first_txg; 2332 spa->spa_prev_software_version = ub->ub_software_version; 2333 2334 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2335 if (error) 2336 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2337 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2338 2339 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) 2340 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2341 2342 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 2343 boolean_t missing_feat_read = B_FALSE; 2344 nvlist_t *unsup_feat, *enabled_feat; 2345 2346 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 2347 &spa->spa_feat_for_read_obj) != 0) { 2348 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2349 } 2350 2351 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 2352 &spa->spa_feat_for_write_obj) != 0) { 2353 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2354 } 2355 2356 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 2357 &spa->spa_feat_desc_obj) != 0) { 2358 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2359 } 2360 2361 enabled_feat = fnvlist_alloc(); 2362 unsup_feat = fnvlist_alloc(); 2363 2364 if (!spa_features_check(spa, B_FALSE, 2365 unsup_feat, enabled_feat)) 2366 missing_feat_read = B_TRUE; 2367 2368 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { 2369 if (!spa_features_check(spa, B_TRUE, 2370 unsup_feat, enabled_feat)) { 2371 missing_feat_write = B_TRUE; 2372 } 2373 } 2374 2375 fnvlist_add_nvlist(spa->spa_load_info, 2376 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 2377 2378 if (!nvlist_empty(unsup_feat)) { 2379 fnvlist_add_nvlist(spa->spa_load_info, 2380 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 2381 } 2382 2383 fnvlist_free(enabled_feat); 2384 fnvlist_free(unsup_feat); 2385 2386 if (!missing_feat_read) { 2387 fnvlist_add_boolean(spa->spa_load_info, 2388 ZPOOL_CONFIG_CAN_RDONLY); 2389 } 2390 2391 /* 2392 * If the state is SPA_LOAD_TRYIMPORT, our objective is 2393 * twofold: to determine whether the pool is available for 2394 * import in read-write mode and (if it is not) whether the 2395 * pool is available for import in read-only mode. If the pool 2396 * is available for import in read-write mode, it is displayed 2397 * as available in userland; if it is not available for import 2398 * in read-only mode, it is displayed as unavailable in 2399 * userland. If the pool is available for import in read-only 2400 * mode but not read-write mode, it is displayed as unavailable 2401 * in userland with a special note that the pool is actually 2402 * available for open in read-only mode. 2403 * 2404 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 2405 * missing a feature for write, we must first determine whether 2406 * the pool can be opened read-only before returning to 2407 * userland in order to know whether to display the 2408 * abovementioned note. 2409 */ 2410 if (missing_feat_read || (missing_feat_write && 2411 spa_writeable(spa))) { 2412 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2413 ENOTSUP)); 2414 } 2415 2416 /* 2417 * Load refcounts for ZFS features from disk into an in-memory 2418 * cache during SPA initialization. 2419 */ 2420 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 2421 uint64_t refcount; 2422 2423 error = feature_get_refcount_from_disk(spa, 2424 &spa_feature_table[i], &refcount); 2425 if (error == 0) { 2426 spa->spa_feat_refcount_cache[i] = refcount; 2427 } else if (error == ENOTSUP) { 2428 spa->spa_feat_refcount_cache[i] = 2429 SPA_FEATURE_DISABLED; 2430 } else { 2431 return (spa_vdev_err(rvd, 2432 VDEV_AUX_CORRUPT_DATA, EIO)); 2433 } 2434 } 2435 } 2436 2437 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { 2438 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, 2439 &spa->spa_feat_enabled_txg_obj) != 0) 2440 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2441 } 2442 2443 spa->spa_is_initializing = B_TRUE; 2444 error = dsl_pool_open(spa->spa_dsl_pool); 2445 spa->spa_is_initializing = B_FALSE; 2446 if (error != 0) 2447 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2448 2449 if (!mosconfig) { 2450 uint64_t hostid; 2451 nvlist_t *policy = NULL, *nvconfig; 2452 2453 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2454 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2455 2456 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, 2457 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2458 char *hostname; 2459 unsigned long myhostid = 0; 2460 2461 VERIFY(nvlist_lookup_string(nvconfig, 2462 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); 2463 2464#ifdef _KERNEL 2465 myhostid = zone_get_hostid(NULL); 2466#else /* _KERNEL */ 2467 /* 2468 * We're emulating the system's hostid in userland, so 2469 * we can't use zone_get_hostid(). 2470 */ 2471 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); 2472#endif /* _KERNEL */ 2473 if (check_hostid && hostid != 0 && myhostid != 0 && 2474 hostid != myhostid) { 2475 nvlist_free(nvconfig); 2476 cmn_err(CE_WARN, "pool '%s' could not be " 2477 "loaded as it was last accessed by " 2478 "another system (host: %s hostid: 0x%lx). " 2479 "See: http://illumos.org/msg/ZFS-8000-EY", 2480 spa_name(spa), hostname, 2481 (unsigned long)hostid); 2482 return (SET_ERROR(EBADF)); 2483 } 2484 } 2485 if (nvlist_lookup_nvlist(spa->spa_config, 2486 ZPOOL_REWIND_POLICY, &policy) == 0) 2487 VERIFY(nvlist_add_nvlist(nvconfig, 2488 ZPOOL_REWIND_POLICY, policy) == 0); 2489 2490 spa_config_set(spa, nvconfig); 2491 spa_unload(spa); 2492 spa_deactivate(spa); 2493 spa_activate(spa, orig_mode); 2494 2495 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); 2496 } 2497 2498 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) 2499 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2500 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 2501 if (error != 0) 2502 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2503 2504 /* 2505 * Load the bit that tells us to use the new accounting function 2506 * (raid-z deflation). If we have an older pool, this will not 2507 * be present. 2508 */ 2509 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); 2510 if (error != 0 && error != ENOENT) 2511 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2512 2513 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 2514 &spa->spa_creation_version); 2515 if (error != 0 && error != ENOENT) 2516 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2517 2518 /* 2519 * Load the persistent error log. If we have an older pool, this will 2520 * not be present. 2521 */ 2522 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); 2523 if (error != 0 && error != ENOENT) 2524 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2525 2526 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 2527 &spa->spa_errlog_scrub); 2528 if (error != 0 && error != ENOENT) 2529 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2530 2531 /* 2532 * Load the history object. If we have an older pool, this 2533 * will not be present. 2534 */ 2535 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); 2536 if (error != 0 && error != ENOENT) 2537 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2538 2539 /* 2540 * If we're assembling the pool from the split-off vdevs of 2541 * an existing pool, we don't want to attach the spares & cache 2542 * devices. 2543 */ 2544 2545 /* 2546 * Load any hot spares for this pool. 2547 */ 2548 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); 2549 if (error != 0 && error != ENOENT) 2550 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2551 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2552 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 2553 if (load_nvlist(spa, spa->spa_spares.sav_object, 2554 &spa->spa_spares.sav_config) != 0) 2555 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2556 2557 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2558 spa_load_spares(spa); 2559 spa_config_exit(spa, SCL_ALL, FTAG); 2560 } else if (error == 0) { 2561 spa->spa_spares.sav_sync = B_TRUE; 2562 } 2563 2564 /* 2565 * Load any level 2 ARC devices for this pool. 2566 */ 2567 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 2568 &spa->spa_l2cache.sav_object); 2569 if (error != 0 && error != ENOENT) 2570 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2571 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2572 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 2573 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 2574 &spa->spa_l2cache.sav_config) != 0) 2575 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2576 2577 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2578 spa_load_l2cache(spa); 2579 spa_config_exit(spa, SCL_ALL, FTAG); 2580 } else if (error == 0) { 2581 spa->spa_l2cache.sav_sync = B_TRUE; 2582 } 2583 2584 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 2585 2586 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); 2587 if (error && error != ENOENT) 2588 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2589 2590 if (error == 0) { 2591 uint64_t autoreplace; 2592 2593 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 2594 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 2595 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 2596 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 2597 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 2598 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 2599 &spa->spa_dedup_ditto); 2600 2601 spa->spa_autoreplace = (autoreplace != 0); 2602 } 2603 2604 /* 2605 * If the 'autoreplace' property is set, then post a resource notifying 2606 * the ZFS DE that it should not issue any faults for unopenable 2607 * devices. We also iterate over the vdevs, and post a sysevent for any 2608 * unopenable vdevs so that the normal autoreplace handler can take 2609 * over. 2610 */ 2611 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { 2612 spa_check_removed(spa->spa_root_vdev); 2613 /* 2614 * For the import case, this is done in spa_import(), because 2615 * at this point we're using the spare definitions from 2616 * the MOS config, not necessarily from the userland config. 2617 */ 2618 if (state != SPA_LOAD_IMPORT) { 2619 spa_aux_check_removed(&spa->spa_spares); 2620 spa_aux_check_removed(&spa->spa_l2cache); 2621 } 2622 } 2623 2624 /* 2625 * Load the vdev state for all toplevel vdevs. 2626 */ 2627 vdev_load(rvd); 2628 2629 /* 2630 * Propagate the leaf DTLs we just loaded all the way up the tree. 2631 */ 2632 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2633 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 2634 spa_config_exit(spa, SCL_ALL, FTAG); 2635 2636 /* 2637 * Load the DDTs (dedup tables). 2638 */ 2639 error = ddt_load(spa); 2640 if (error != 0) 2641 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2642 2643 spa_update_dspace(spa); 2644 2645 /* 2646 * Validate the config, using the MOS config to fill in any 2647 * information which might be missing. If we fail to validate 2648 * the config then declare the pool unfit for use. If we're 2649 * assembling a pool from a split, the log is not transferred 2650 * over. 2651 */ 2652 if (type != SPA_IMPORT_ASSEMBLE) { 2653 nvlist_t *nvconfig; 2654 2655 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2656 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2657 2658 if (!spa_config_valid(spa, nvconfig)) { 2659 nvlist_free(nvconfig); 2660 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 2661 ENXIO)); 2662 } 2663 nvlist_free(nvconfig); 2664 2665 /* 2666 * Now that we've validated the config, check the state of the 2667 * root vdev. If it can't be opened, it indicates one or 2668 * more toplevel vdevs are faulted. 2669 */ 2670 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2671 return (SET_ERROR(ENXIO)); 2672 2673 if (spa_check_logs(spa)) { 2674 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 2675 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); 2676 } 2677 } 2678 2679 if (missing_feat_write) { 2680 ASSERT(state == SPA_LOAD_TRYIMPORT); 2681 2682 /* 2683 * At this point, we know that we can open the pool in 2684 * read-only mode but not read-write mode. We now have enough 2685 * information and can return to userland. 2686 */ 2687 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); 2688 } 2689 2690 /* 2691 * We've successfully opened the pool, verify that we're ready 2692 * to start pushing transactions. 2693 */ 2694 if (state != SPA_LOAD_TRYIMPORT) { 2695 if (error = spa_load_verify(spa)) 2696 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2697 error)); 2698 } 2699 2700 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || 2701 spa->spa_load_max_txg == UINT64_MAX)) { 2702 dmu_tx_t *tx; 2703 int need_update = B_FALSE; 2704 2705 ASSERT(state != SPA_LOAD_TRYIMPORT); 2706 2707 /* 2708 * Claim log blocks that haven't been committed yet. 2709 * This must all happen in a single txg. 2710 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 2711 * invoked from zil_claim_log_block()'s i/o done callback. 2712 * Price of rollback is that we abandon the log. 2713 */ 2714 spa->spa_claiming = B_TRUE; 2715 2716 tx = dmu_tx_create_assigned(spa_get_dsl(spa), 2717 spa_first_txg(spa)); 2718 (void) dmu_objset_find(spa_name(spa), 2719 zil_claim, tx, DS_FIND_CHILDREN); 2720 dmu_tx_commit(tx); 2721 2722 spa->spa_claiming = B_FALSE; 2723 2724 spa_set_log_state(spa, SPA_LOG_GOOD); 2725 spa->spa_sync_on = B_TRUE; 2726 txg_sync_start(spa->spa_dsl_pool); 2727 2728 /* 2729 * Wait for all claims to sync. We sync up to the highest 2730 * claimed log block birth time so that claimed log blocks 2731 * don't appear to be from the future. spa_claim_max_txg 2732 * will have been set for us by either zil_check_log_chain() 2733 * (invoked from spa_check_logs()) or zil_claim() above. 2734 */ 2735 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 2736 2737 /* 2738 * If the config cache is stale, or we have uninitialized 2739 * metaslabs (see spa_vdev_add()), then update the config. 2740 * 2741 * If this is a verbatim import, trust the current 2742 * in-core spa_config and update the disk labels. 2743 */ 2744 if (config_cache_txg != spa->spa_config_txg || 2745 state == SPA_LOAD_IMPORT || 2746 state == SPA_LOAD_RECOVER || 2747 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 2748 need_update = B_TRUE; 2749 2750 for (int c = 0; c < rvd->vdev_children; c++) 2751 if (rvd->vdev_child[c]->vdev_ms_array == 0) 2752 need_update = B_TRUE; 2753 2754 /* 2755 * Update the config cache asychronously in case we're the 2756 * root pool, in which case the config cache isn't writable yet. 2757 */ 2758 if (need_update) 2759 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2760 2761 /* 2762 * Check all DTLs to see if anything needs resilvering. 2763 */ 2764 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 2765 vdev_resilver_needed(rvd, NULL, NULL)) 2766 spa_async_request(spa, SPA_ASYNC_RESILVER); 2767 2768 /* 2769 * Log the fact that we booted up (so that we can detect if 2770 * we rebooted in the middle of an operation). 2771 */ 2772 spa_history_log_version(spa, "open"); 2773 2774 /* 2775 * Delete any inconsistent datasets. 2776 */ 2777 (void) dmu_objset_find(spa_name(spa), 2778 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 2779 2780 /* 2781 * Clean up any stale temporary dataset userrefs. 2782 */ 2783 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 2784 } 2785 2786 return (0); 2787} 2788 2789static int 2790spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) 2791{ 2792 int mode = spa->spa_mode; 2793 2794 spa_unload(spa); 2795 spa_deactivate(spa); 2796 2797 spa->spa_load_max_txg--; 2798 2799 spa_activate(spa, mode); 2800 spa_async_suspend(spa); 2801 2802 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); 2803} 2804 2805/* 2806 * If spa_load() fails this function will try loading prior txg's. If 2807 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 2808 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 2809 * function will not rewind the pool and will return the same error as 2810 * spa_load(). 2811 */ 2812static int 2813spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, 2814 uint64_t max_request, int rewind_flags) 2815{ 2816 nvlist_t *loadinfo = NULL; 2817 nvlist_t *config = NULL; 2818 int load_error, rewind_error; 2819 uint64_t safe_rewind_txg; 2820 uint64_t min_txg; 2821 2822 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 2823 spa->spa_load_max_txg = spa->spa_load_txg; 2824 spa_set_log_state(spa, SPA_LOG_CLEAR); 2825 } else { 2826 spa->spa_load_max_txg = max_request; 2827 } 2828 2829 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, 2830 mosconfig); 2831 if (load_error == 0) 2832 return (0); 2833 2834 if (spa->spa_root_vdev != NULL) 2835 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2836 2837 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 2838 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 2839 2840 if (rewind_flags & ZPOOL_NEVER_REWIND) { 2841 nvlist_free(config); 2842 return (load_error); 2843 } 2844 2845 if (state == SPA_LOAD_RECOVER) { 2846 /* Price of rolling back is discarding txgs, including log */ 2847 spa_set_log_state(spa, SPA_LOG_CLEAR); 2848 } else { 2849 /* 2850 * If we aren't rolling back save the load info from our first 2851 * import attempt so that we can restore it after attempting 2852 * to rewind. 2853 */ 2854 loadinfo = spa->spa_load_info; 2855 spa->spa_load_info = fnvlist_alloc(); 2856 } 2857 2858 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 2859 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 2860 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 2861 TXG_INITIAL : safe_rewind_txg; 2862 2863 /* 2864 * Continue as long as we're finding errors, we're still within 2865 * the acceptable rewind range, and we're still finding uberblocks 2866 */ 2867 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 2868 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 2869 if (spa->spa_load_max_txg < safe_rewind_txg) 2870 spa->spa_extreme_rewind = B_TRUE; 2871 rewind_error = spa_load_retry(spa, state, mosconfig); 2872 } 2873 2874 spa->spa_extreme_rewind = B_FALSE; 2875 spa->spa_load_max_txg = UINT64_MAX; 2876 2877 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 2878 spa_config_set(spa, config); 2879 2880 if (state == SPA_LOAD_RECOVER) { 2881 ASSERT3P(loadinfo, ==, NULL); 2882 return (rewind_error); 2883 } else { 2884 /* Store the rewind info as part of the initial load info */ 2885 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 2886 spa->spa_load_info); 2887 2888 /* Restore the initial load info */ 2889 fnvlist_free(spa->spa_load_info); 2890 spa->spa_load_info = loadinfo; 2891 2892 return (load_error); 2893 } 2894} 2895 2896/* 2897 * Pool Open/Import 2898 * 2899 * The import case is identical to an open except that the configuration is sent 2900 * down from userland, instead of grabbed from the configuration cache. For the 2901 * case of an open, the pool configuration will exist in the 2902 * POOL_STATE_UNINITIALIZED state. 2903 * 2904 * The stats information (gen/count/ustats) is used to gather vdev statistics at 2905 * the same time open the pool, without having to keep around the spa_t in some 2906 * ambiguous state. 2907 */ 2908static int 2909spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 2910 nvlist_t **config) 2911{ 2912 spa_t *spa; 2913 spa_load_state_t state = SPA_LOAD_OPEN; 2914 int error; 2915 int locked = B_FALSE; 2916 int firstopen = B_FALSE; 2917 2918 *spapp = NULL; 2919 2920 /* 2921 * As disgusting as this is, we need to support recursive calls to this 2922 * function because dsl_dir_open() is called during spa_load(), and ends 2923 * up calling spa_open() again. The real fix is to figure out how to 2924 * avoid dsl_dir_open() calling this in the first place. 2925 */ 2926 if (mutex_owner(&spa_namespace_lock) != curthread) { 2927 mutex_enter(&spa_namespace_lock); 2928 locked = B_TRUE; 2929 } 2930 2931 if ((spa = spa_lookup(pool)) == NULL) { 2932 if (locked) 2933 mutex_exit(&spa_namespace_lock); 2934 return (SET_ERROR(ENOENT)); 2935 } 2936 2937 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 2938 zpool_rewind_policy_t policy; 2939 2940 firstopen = B_TRUE; 2941 2942 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, 2943 &policy); 2944 if (policy.zrp_request & ZPOOL_DO_REWIND) 2945 state = SPA_LOAD_RECOVER; 2946 2947 spa_activate(spa, spa_mode_global); 2948 2949 if (state != SPA_LOAD_RECOVER) 2950 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 2951 2952 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, 2953 policy.zrp_request); 2954 2955 if (error == EBADF) { 2956 /* 2957 * If vdev_validate() returns failure (indicated by 2958 * EBADF), it indicates that one of the vdevs indicates 2959 * that the pool has been exported or destroyed. If 2960 * this is the case, the config cache is out of sync and 2961 * we should remove the pool from the namespace. 2962 */ 2963 spa_unload(spa); 2964 spa_deactivate(spa); 2965 spa_config_sync(spa, B_TRUE, B_TRUE); 2966 spa_remove(spa); 2967 if (locked) 2968 mutex_exit(&spa_namespace_lock); 2969 return (SET_ERROR(ENOENT)); 2970 } 2971 2972 if (error) { 2973 /* 2974 * We can't open the pool, but we still have useful 2975 * information: the state of each vdev after the 2976 * attempted vdev_open(). Return this to the user. 2977 */ 2978 if (config != NULL && spa->spa_config) { 2979 VERIFY(nvlist_dup(spa->spa_config, config, 2980 KM_SLEEP) == 0); 2981 VERIFY(nvlist_add_nvlist(*config, 2982 ZPOOL_CONFIG_LOAD_INFO, 2983 spa->spa_load_info) == 0); 2984 } 2985 spa_unload(spa); 2986 spa_deactivate(spa); 2987 spa->spa_last_open_failed = error; 2988 if (locked) 2989 mutex_exit(&spa_namespace_lock); 2990 *spapp = NULL; 2991 return (error); 2992 } 2993 } 2994 2995 spa_open_ref(spa, tag); 2996 2997 if (config != NULL) 2998 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2999 3000 /* 3001 * If we've recovered the pool, pass back any information we 3002 * gathered while doing the load. 3003 */ 3004 if (state == SPA_LOAD_RECOVER) { 3005 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 3006 spa->spa_load_info) == 0); 3007 } 3008 3009 if (locked) { 3010 spa->spa_last_open_failed = 0; 3011 spa->spa_last_ubsync_txg = 0; 3012 spa->spa_load_txg = 0; 3013 mutex_exit(&spa_namespace_lock); 3014#ifdef __FreeBSD__ 3015#ifdef _KERNEL 3016 if (firstopen) 3017 zvol_create_minors(spa->spa_name); 3018#endif 3019#endif 3020 } 3021 3022 *spapp = spa; 3023 3024 return (0); 3025} 3026 3027int 3028spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 3029 nvlist_t **config) 3030{ 3031 return (spa_open_common(name, spapp, tag, policy, config)); 3032} 3033 3034int 3035spa_open(const char *name, spa_t **spapp, void *tag) 3036{ 3037 return (spa_open_common(name, spapp, tag, NULL, NULL)); 3038} 3039 3040/* 3041 * Lookup the given spa_t, incrementing the inject count in the process, 3042 * preventing it from being exported or destroyed. 3043 */ 3044spa_t * 3045spa_inject_addref(char *name) 3046{ 3047 spa_t *spa; 3048 3049 mutex_enter(&spa_namespace_lock); 3050 if ((spa = spa_lookup(name)) == NULL) { 3051 mutex_exit(&spa_namespace_lock); 3052 return (NULL); 3053 } 3054 spa->spa_inject_ref++; 3055 mutex_exit(&spa_namespace_lock); 3056 3057 return (spa); 3058} 3059 3060void 3061spa_inject_delref(spa_t *spa) 3062{ 3063 mutex_enter(&spa_namespace_lock); 3064 spa->spa_inject_ref--; 3065 mutex_exit(&spa_namespace_lock); 3066} 3067 3068/* 3069 * Add spares device information to the nvlist. 3070 */ 3071static void 3072spa_add_spares(spa_t *spa, nvlist_t *config) 3073{ 3074 nvlist_t **spares; 3075 uint_t i, nspares; 3076 nvlist_t *nvroot; 3077 uint64_t guid; 3078 vdev_stat_t *vs; 3079 uint_t vsc; 3080 uint64_t pool; 3081 3082 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3083 3084 if (spa->spa_spares.sav_count == 0) 3085 return; 3086 3087 VERIFY(nvlist_lookup_nvlist(config, 3088 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3089 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 3090 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3091 if (nspares != 0) { 3092 VERIFY(nvlist_add_nvlist_array(nvroot, 3093 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3094 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3095 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3096 3097 /* 3098 * Go through and find any spares which have since been 3099 * repurposed as an active spare. If this is the case, update 3100 * their status appropriately. 3101 */ 3102 for (i = 0; i < nspares; i++) { 3103 VERIFY(nvlist_lookup_uint64(spares[i], 3104 ZPOOL_CONFIG_GUID, &guid) == 0); 3105 if (spa_spare_exists(guid, &pool, NULL) && 3106 pool != 0ULL) { 3107 VERIFY(nvlist_lookup_uint64_array( 3108 spares[i], ZPOOL_CONFIG_VDEV_STATS, 3109 (uint64_t **)&vs, &vsc) == 0); 3110 vs->vs_state = VDEV_STATE_CANT_OPEN; 3111 vs->vs_aux = VDEV_AUX_SPARED; 3112 } 3113 } 3114 } 3115} 3116 3117/* 3118 * Add l2cache device information to the nvlist, including vdev stats. 3119 */ 3120static void 3121spa_add_l2cache(spa_t *spa, nvlist_t *config) 3122{ 3123 nvlist_t **l2cache; 3124 uint_t i, j, nl2cache; 3125 nvlist_t *nvroot; 3126 uint64_t guid; 3127 vdev_t *vd; 3128 vdev_stat_t *vs; 3129 uint_t vsc; 3130 3131 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3132 3133 if (spa->spa_l2cache.sav_count == 0) 3134 return; 3135 3136 VERIFY(nvlist_lookup_nvlist(config, 3137 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3138 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 3139 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3140 if (nl2cache != 0) { 3141 VERIFY(nvlist_add_nvlist_array(nvroot, 3142 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3143 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3144 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3145 3146 /* 3147 * Update level 2 cache device stats. 3148 */ 3149 3150 for (i = 0; i < nl2cache; i++) { 3151 VERIFY(nvlist_lookup_uint64(l2cache[i], 3152 ZPOOL_CONFIG_GUID, &guid) == 0); 3153 3154 vd = NULL; 3155 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 3156 if (guid == 3157 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 3158 vd = spa->spa_l2cache.sav_vdevs[j]; 3159 break; 3160 } 3161 } 3162 ASSERT(vd != NULL); 3163 3164 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 3165 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 3166 == 0); 3167 vdev_get_stats(vd, vs); 3168 } 3169 } 3170} 3171 3172static void 3173spa_add_feature_stats(spa_t *spa, nvlist_t *config) 3174{ 3175 nvlist_t *features; 3176 zap_cursor_t zc; 3177 zap_attribute_t za; 3178 3179 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3180 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3181 3182 /* We may be unable to read features if pool is suspended. */ 3183 if (spa_suspended(spa)) 3184 goto out; 3185 3186 if (spa->spa_feat_for_read_obj != 0) { 3187 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3188 spa->spa_feat_for_read_obj); 3189 zap_cursor_retrieve(&zc, &za) == 0; 3190 zap_cursor_advance(&zc)) { 3191 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3192 za.za_num_integers == 1); 3193 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3194 za.za_first_integer)); 3195 } 3196 zap_cursor_fini(&zc); 3197 } 3198 3199 if (spa->spa_feat_for_write_obj != 0) { 3200 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3201 spa->spa_feat_for_write_obj); 3202 zap_cursor_retrieve(&zc, &za) == 0; 3203 zap_cursor_advance(&zc)) { 3204 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3205 za.za_num_integers == 1); 3206 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3207 za.za_first_integer)); 3208 } 3209 zap_cursor_fini(&zc); 3210 } 3211 3212out: 3213 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 3214 features) == 0); 3215 nvlist_free(features); 3216} 3217 3218int 3219spa_get_stats(const char *name, nvlist_t **config, 3220 char *altroot, size_t buflen) 3221{ 3222 int error; 3223 spa_t *spa; 3224 3225 *config = NULL; 3226 error = spa_open_common(name, &spa, FTAG, NULL, config); 3227 3228 if (spa != NULL) { 3229 /* 3230 * This still leaves a window of inconsistency where the spares 3231 * or l2cache devices could change and the config would be 3232 * self-inconsistent. 3233 */ 3234 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3235 3236 if (*config != NULL) { 3237 uint64_t loadtimes[2]; 3238 3239 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 3240 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 3241 VERIFY(nvlist_add_uint64_array(*config, 3242 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 3243 3244 VERIFY(nvlist_add_uint64(*config, 3245 ZPOOL_CONFIG_ERRCOUNT, 3246 spa_get_errlog_size(spa)) == 0); 3247 3248 if (spa_suspended(spa)) 3249 VERIFY(nvlist_add_uint64(*config, 3250 ZPOOL_CONFIG_SUSPENDED, 3251 spa->spa_failmode) == 0); 3252 3253 spa_add_spares(spa, *config); 3254 spa_add_l2cache(spa, *config); 3255 spa_add_feature_stats(spa, *config); 3256 } 3257 } 3258 3259 /* 3260 * We want to get the alternate root even for faulted pools, so we cheat 3261 * and call spa_lookup() directly. 3262 */ 3263 if (altroot) { 3264 if (spa == NULL) { 3265 mutex_enter(&spa_namespace_lock); 3266 spa = spa_lookup(name); 3267 if (spa) 3268 spa_altroot(spa, altroot, buflen); 3269 else 3270 altroot[0] = '\0'; 3271 spa = NULL; 3272 mutex_exit(&spa_namespace_lock); 3273 } else { 3274 spa_altroot(spa, altroot, buflen); 3275 } 3276 } 3277 3278 if (spa != NULL) { 3279 spa_config_exit(spa, SCL_CONFIG, FTAG); 3280 spa_close(spa, FTAG); 3281 } 3282 3283 return (error); 3284} 3285 3286/* 3287 * Validate that the auxiliary device array is well formed. We must have an 3288 * array of nvlists, each which describes a valid leaf vdev. If this is an 3289 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 3290 * specified, as long as they are well-formed. 3291 */ 3292static int 3293spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 3294 spa_aux_vdev_t *sav, const char *config, uint64_t version, 3295 vdev_labeltype_t label) 3296{ 3297 nvlist_t **dev; 3298 uint_t i, ndev; 3299 vdev_t *vd; 3300 int error; 3301 3302 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3303 3304 /* 3305 * It's acceptable to have no devs specified. 3306 */ 3307 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 3308 return (0); 3309 3310 if (ndev == 0) 3311 return (SET_ERROR(EINVAL)); 3312 3313 /* 3314 * Make sure the pool is formatted with a version that supports this 3315 * device type. 3316 */ 3317 if (spa_version(spa) < version) 3318 return (SET_ERROR(ENOTSUP)); 3319 3320 /* 3321 * Set the pending device list so we correctly handle device in-use 3322 * checking. 3323 */ 3324 sav->sav_pending = dev; 3325 sav->sav_npending = ndev; 3326 3327 for (i = 0; i < ndev; i++) { 3328 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 3329 mode)) != 0) 3330 goto out; 3331 3332 if (!vd->vdev_ops->vdev_op_leaf) { 3333 vdev_free(vd); 3334 error = SET_ERROR(EINVAL); 3335 goto out; 3336 } 3337 3338 /* 3339 * The L2ARC currently only supports disk devices in 3340 * kernel context. For user-level testing, we allow it. 3341 */ 3342#ifdef _KERNEL 3343 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && 3344 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { 3345 error = SET_ERROR(ENOTBLK); 3346 vdev_free(vd); 3347 goto out; 3348 } 3349#endif 3350 vd->vdev_top = vd; 3351 3352 if ((error = vdev_open(vd)) == 0 && 3353 (error = vdev_label_init(vd, crtxg, label)) == 0) { 3354 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 3355 vd->vdev_guid) == 0); 3356 } 3357 3358 vdev_free(vd); 3359 3360 if (error && 3361 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 3362 goto out; 3363 else 3364 error = 0; 3365 } 3366 3367out: 3368 sav->sav_pending = NULL; 3369 sav->sav_npending = 0; 3370 return (error); 3371} 3372 3373static int 3374spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 3375{ 3376 int error; 3377 3378 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3379 3380 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3381 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 3382 VDEV_LABEL_SPARE)) != 0) { 3383 return (error); 3384 } 3385 3386 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3387 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 3388 VDEV_LABEL_L2CACHE)); 3389} 3390 3391static void 3392spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 3393 const char *config) 3394{ 3395 int i; 3396 3397 if (sav->sav_config != NULL) { 3398 nvlist_t **olddevs; 3399 uint_t oldndevs; 3400 nvlist_t **newdevs; 3401 3402 /* 3403 * Generate new dev list by concatentating with the 3404 * current dev list. 3405 */ 3406 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 3407 &olddevs, &oldndevs) == 0); 3408 3409 newdevs = kmem_alloc(sizeof (void *) * 3410 (ndevs + oldndevs), KM_SLEEP); 3411 for (i = 0; i < oldndevs; i++) 3412 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 3413 KM_SLEEP) == 0); 3414 for (i = 0; i < ndevs; i++) 3415 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 3416 KM_SLEEP) == 0); 3417 3418 VERIFY(nvlist_remove(sav->sav_config, config, 3419 DATA_TYPE_NVLIST_ARRAY) == 0); 3420 3421 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 3422 config, newdevs, ndevs + oldndevs) == 0); 3423 for (i = 0; i < oldndevs + ndevs; i++) 3424 nvlist_free(newdevs[i]); 3425 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 3426 } else { 3427 /* 3428 * Generate a new dev list. 3429 */ 3430 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 3431 KM_SLEEP) == 0); 3432 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 3433 devs, ndevs) == 0); 3434 } 3435} 3436 3437/* 3438 * Stop and drop level 2 ARC devices 3439 */ 3440void 3441spa_l2cache_drop(spa_t *spa) 3442{ 3443 vdev_t *vd; 3444 int i; 3445 spa_aux_vdev_t *sav = &spa->spa_l2cache; 3446 3447 for (i = 0; i < sav->sav_count; i++) { 3448 uint64_t pool; 3449 3450 vd = sav->sav_vdevs[i]; 3451 ASSERT(vd != NULL); 3452 3453 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 3454 pool != 0ULL && l2arc_vdev_present(vd)) 3455 l2arc_remove_vdev(vd); 3456 } 3457} 3458 3459/* 3460 * Pool Creation 3461 */ 3462int 3463spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 3464 nvlist_t *zplprops) 3465{ 3466 spa_t *spa; 3467 char *altroot = NULL; 3468 vdev_t *rvd; 3469 dsl_pool_t *dp; 3470 dmu_tx_t *tx; 3471 int error = 0; 3472 uint64_t txg = TXG_INITIAL; 3473 nvlist_t **spares, **l2cache; 3474 uint_t nspares, nl2cache; 3475 uint64_t version, obj; 3476 boolean_t has_features; 3477 3478 /* 3479 * If this pool already exists, return failure. 3480 */ 3481 mutex_enter(&spa_namespace_lock); 3482 if (spa_lookup(pool) != NULL) { 3483 mutex_exit(&spa_namespace_lock); 3484 return (SET_ERROR(EEXIST)); 3485 } 3486 3487 /* 3488 * Allocate a new spa_t structure. 3489 */ 3490 (void) nvlist_lookup_string(props, 3491 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3492 spa = spa_add(pool, NULL, altroot); 3493 spa_activate(spa, spa_mode_global); 3494 3495 if (props && (error = spa_prop_validate(spa, props))) { 3496 spa_deactivate(spa); 3497 spa_remove(spa); 3498 mutex_exit(&spa_namespace_lock); 3499 return (error); 3500 } 3501 3502 has_features = B_FALSE; 3503 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 3504 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 3505 if (zpool_prop_feature(nvpair_name(elem))) 3506 has_features = B_TRUE; 3507 } 3508 3509 if (has_features || nvlist_lookup_uint64(props, 3510 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 3511 version = SPA_VERSION; 3512 } 3513 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 3514 3515 spa->spa_first_txg = txg; 3516 spa->spa_uberblock.ub_txg = txg - 1; 3517 spa->spa_uberblock.ub_version = version; 3518 spa->spa_ubsync = spa->spa_uberblock; 3519 3520 /* 3521 * Create "The Godfather" zio to hold all async IOs 3522 */ 3523 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 3524 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 3525 3526 /* 3527 * Create the root vdev. 3528 */ 3529 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3530 3531 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 3532 3533 ASSERT(error != 0 || rvd != NULL); 3534 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 3535 3536 if (error == 0 && !zfs_allocatable_devs(nvroot)) 3537 error = SET_ERROR(EINVAL); 3538 3539 if (error == 0 && 3540 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 3541 (error = spa_validate_aux(spa, nvroot, txg, 3542 VDEV_ALLOC_ADD)) == 0) { 3543 for (int c = 0; c < rvd->vdev_children; c++) { 3544 vdev_ashift_optimize(rvd->vdev_child[c]); 3545 vdev_metaslab_set_size(rvd->vdev_child[c]); 3546 vdev_expand(rvd->vdev_child[c], txg); 3547 } 3548 } 3549 3550 spa_config_exit(spa, SCL_ALL, FTAG); 3551 3552 if (error != 0) { 3553 spa_unload(spa); 3554 spa_deactivate(spa); 3555 spa_remove(spa); 3556 mutex_exit(&spa_namespace_lock); 3557 return (error); 3558 } 3559 3560 /* 3561 * Get the list of spares, if specified. 3562 */ 3563 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3564 &spares, &nspares) == 0) { 3565 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 3566 KM_SLEEP) == 0); 3567 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3568 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3569 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3570 spa_load_spares(spa); 3571 spa_config_exit(spa, SCL_ALL, FTAG); 3572 spa->spa_spares.sav_sync = B_TRUE; 3573 } 3574 3575 /* 3576 * Get the list of level 2 cache devices, if specified. 3577 */ 3578 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3579 &l2cache, &nl2cache) == 0) { 3580 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3581 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3582 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3583 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3584 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3585 spa_load_l2cache(spa); 3586 spa_config_exit(spa, SCL_ALL, FTAG); 3587 spa->spa_l2cache.sav_sync = B_TRUE; 3588 } 3589 3590 spa->spa_is_initializing = B_TRUE; 3591 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); 3592 spa->spa_meta_objset = dp->dp_meta_objset; 3593 spa->spa_is_initializing = B_FALSE; 3594 3595 /* 3596 * Create DDTs (dedup tables). 3597 */ 3598 ddt_create(spa); 3599 3600 spa_update_dspace(spa); 3601 3602 tx = dmu_tx_create_assigned(dp, txg); 3603 3604 /* 3605 * Create the pool config object. 3606 */ 3607 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 3608 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 3609 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 3610 3611 if (zap_add(spa->spa_meta_objset, 3612 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 3613 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 3614 cmn_err(CE_PANIC, "failed to add pool config"); 3615 } 3616 3617 if (spa_version(spa) >= SPA_VERSION_FEATURES) 3618 spa_feature_create_zap_objects(spa, tx); 3619 3620 if (zap_add(spa->spa_meta_objset, 3621 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 3622 sizeof (uint64_t), 1, &version, tx) != 0) { 3623 cmn_err(CE_PANIC, "failed to add pool version"); 3624 } 3625 3626 /* Newly created pools with the right version are always deflated. */ 3627 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 3628 spa->spa_deflate = TRUE; 3629 if (zap_add(spa->spa_meta_objset, 3630 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 3631 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 3632 cmn_err(CE_PANIC, "failed to add deflate"); 3633 } 3634 } 3635 3636 /* 3637 * Create the deferred-free bpobj. Turn off compression 3638 * because sync-to-convergence takes longer if the blocksize 3639 * keeps changing. 3640 */ 3641 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 3642 dmu_object_set_compress(spa->spa_meta_objset, obj, 3643 ZIO_COMPRESS_OFF, tx); 3644 if (zap_add(spa->spa_meta_objset, 3645 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 3646 sizeof (uint64_t), 1, &obj, tx) != 0) { 3647 cmn_err(CE_PANIC, "failed to add bpobj"); 3648 } 3649 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 3650 spa->spa_meta_objset, obj)); 3651 3652 /* 3653 * Create the pool's history object. 3654 */ 3655 if (version >= SPA_VERSION_ZPOOL_HISTORY) 3656 spa_history_create_obj(spa, tx); 3657 3658 /* 3659 * Set pool properties. 3660 */ 3661 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 3662 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3663 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 3664 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 3665 3666 if (props != NULL) { 3667 spa_configfile_set(spa, props, B_FALSE); 3668 spa_sync_props(props, tx); 3669 } 3670 3671 dmu_tx_commit(tx); 3672 3673 spa->spa_sync_on = B_TRUE; 3674 txg_sync_start(spa->spa_dsl_pool); 3675 3676 /* 3677 * We explicitly wait for the first transaction to complete so that our 3678 * bean counters are appropriately updated. 3679 */ 3680 txg_wait_synced(spa->spa_dsl_pool, txg); 3681 3682 spa_config_sync(spa, B_FALSE, B_TRUE); 3683 3684 spa_history_log_version(spa, "create"); 3685 3686 spa->spa_minref = refcount_count(&spa->spa_refcount); 3687 3688 mutex_exit(&spa_namespace_lock); 3689 3690 return (0); 3691} 3692 3693#ifdef _KERNEL 3694#if defined(sun) 3695/* 3696 * Get the root pool information from the root disk, then import the root pool 3697 * during the system boot up time. 3698 */ 3699extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 3700 3701static nvlist_t * 3702spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 3703{ 3704 nvlist_t *config; 3705 nvlist_t *nvtop, *nvroot; 3706 uint64_t pgid; 3707 3708 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 3709 return (NULL); 3710 3711 /* 3712 * Add this top-level vdev to the child array. 3713 */ 3714 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3715 &nvtop) == 0); 3716 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3717 &pgid) == 0); 3718 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 3719 3720 /* 3721 * Put this pool's top-level vdevs into a root vdev. 3722 */ 3723 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3724 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3725 VDEV_TYPE_ROOT) == 0); 3726 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3727 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3728 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3729 &nvtop, 1) == 0); 3730 3731 /* 3732 * Replace the existing vdev_tree with the new root vdev in 3733 * this pool's configuration (remove the old, add the new). 3734 */ 3735 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3736 nvlist_free(nvroot); 3737 return (config); 3738} 3739 3740/* 3741 * Walk the vdev tree and see if we can find a device with "better" 3742 * configuration. A configuration is "better" if the label on that 3743 * device has a more recent txg. 3744 */ 3745static void 3746spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 3747{ 3748 for (int c = 0; c < vd->vdev_children; c++) 3749 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 3750 3751 if (vd->vdev_ops->vdev_op_leaf) { 3752 nvlist_t *label; 3753 uint64_t label_txg; 3754 3755 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 3756 &label) != 0) 3757 return; 3758 3759 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 3760 &label_txg) == 0); 3761 3762 /* 3763 * Do we have a better boot device? 3764 */ 3765 if (label_txg > *txg) { 3766 *txg = label_txg; 3767 *avd = vd; 3768 } 3769 nvlist_free(label); 3770 } 3771} 3772 3773/* 3774 * Import a root pool. 3775 * 3776 * For x86. devpath_list will consist of devid and/or physpath name of 3777 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 3778 * The GRUB "findroot" command will return the vdev we should boot. 3779 * 3780 * For Sparc, devpath_list consists the physpath name of the booting device 3781 * no matter the rootpool is a single device pool or a mirrored pool. 3782 * e.g. 3783 * "/pci@1f,0/ide@d/disk@0,0:a" 3784 */ 3785int 3786spa_import_rootpool(char *devpath, char *devid) 3787{ 3788 spa_t *spa; 3789 vdev_t *rvd, *bvd, *avd = NULL; 3790 nvlist_t *config, *nvtop; 3791 uint64_t guid, txg; 3792 char *pname; 3793 int error; 3794 3795 /* 3796 * Read the label from the boot device and generate a configuration. 3797 */ 3798 config = spa_generate_rootconf(devpath, devid, &guid); 3799#if defined(_OBP) && defined(_KERNEL) 3800 if (config == NULL) { 3801 if (strstr(devpath, "/iscsi/ssd") != NULL) { 3802 /* iscsi boot */ 3803 get_iscsi_bootpath_phy(devpath); 3804 config = spa_generate_rootconf(devpath, devid, &guid); 3805 } 3806 } 3807#endif 3808 if (config == NULL) { 3809 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 3810 devpath); 3811 return (SET_ERROR(EIO)); 3812 } 3813 3814 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 3815 &pname) == 0); 3816 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 3817 3818 mutex_enter(&spa_namespace_lock); 3819 if ((spa = spa_lookup(pname)) != NULL) { 3820 /* 3821 * Remove the existing root pool from the namespace so that we 3822 * can replace it with the correct config we just read in. 3823 */ 3824 spa_remove(spa); 3825 } 3826 3827 spa = spa_add(pname, config, NULL); 3828 spa->spa_is_root = B_TRUE; 3829 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 3830 3831 /* 3832 * Build up a vdev tree based on the boot device's label config. 3833 */ 3834 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3835 &nvtop) == 0); 3836 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3837 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 3838 VDEV_ALLOC_ROOTPOOL); 3839 spa_config_exit(spa, SCL_ALL, FTAG); 3840 if (error) { 3841 mutex_exit(&spa_namespace_lock); 3842 nvlist_free(config); 3843 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 3844 pname); 3845 return (error); 3846 } 3847 3848 /* 3849 * Get the boot vdev. 3850 */ 3851 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 3852 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 3853 (u_longlong_t)guid); 3854 error = SET_ERROR(ENOENT); 3855 goto out; 3856 } 3857 3858 /* 3859 * Determine if there is a better boot device. 3860 */ 3861 avd = bvd; 3862 spa_alt_rootvdev(rvd, &avd, &txg); 3863 if (avd != bvd) { 3864 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 3865 "try booting from '%s'", avd->vdev_path); 3866 error = SET_ERROR(EINVAL); 3867 goto out; 3868 } 3869 3870 /* 3871 * If the boot device is part of a spare vdev then ensure that 3872 * we're booting off the active spare. 3873 */ 3874 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 3875 !bvd->vdev_isspare) { 3876 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 3877 "try booting from '%s'", 3878 bvd->vdev_parent-> 3879 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 3880 error = SET_ERROR(EINVAL); 3881 goto out; 3882 } 3883 3884 error = 0; 3885out: 3886 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3887 vdev_free(rvd); 3888 spa_config_exit(spa, SCL_ALL, FTAG); 3889 mutex_exit(&spa_namespace_lock); 3890 3891 nvlist_free(config); 3892 return (error); 3893} 3894 3895#else 3896 3897extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs, 3898 uint64_t *count); 3899 3900static nvlist_t * 3901spa_generate_rootconf(const char *name) 3902{ 3903 nvlist_t **configs, **tops; 3904 nvlist_t *config; 3905 nvlist_t *best_cfg, *nvtop, *nvroot; 3906 uint64_t *holes; 3907 uint64_t best_txg; 3908 uint64_t nchildren; 3909 uint64_t pgid; 3910 uint64_t count; 3911 uint64_t i; 3912 uint_t nholes; 3913 3914 if (vdev_geom_read_pool_label(name, &configs, &count) != 0) 3915 return (NULL); 3916 3917 ASSERT3U(count, !=, 0); 3918 best_txg = 0; 3919 for (i = 0; i < count; i++) { 3920 uint64_t txg; 3921 3922 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG, 3923 &txg) == 0); 3924 if (txg > best_txg) { 3925 best_txg = txg; 3926 best_cfg = configs[i]; 3927 } 3928 } 3929 3930 nchildren = 1; 3931 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren); 3932 holes = NULL; 3933 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY, 3934 &holes, &nholes); 3935 3936 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP); 3937 for (i = 0; i < nchildren; i++) { 3938 if (i >= count) 3939 break; 3940 if (configs[i] == NULL) 3941 continue; 3942 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE, 3943 &nvtop) == 0); 3944 nvlist_dup(nvtop, &tops[i], KM_SLEEP); 3945 } 3946 for (i = 0; holes != NULL && i < nholes; i++) { 3947 if (i >= nchildren) 3948 continue; 3949 if (tops[holes[i]] != NULL) 3950 continue; 3951 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP); 3952 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE, 3953 VDEV_TYPE_HOLE) == 0); 3954 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, 3955 holes[i]) == 0); 3956 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 3957 0) == 0); 3958 } 3959 for (i = 0; i < nchildren; i++) { 3960 if (tops[i] != NULL) 3961 continue; 3962 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP); 3963 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE, 3964 VDEV_TYPE_MISSING) == 0); 3965 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, 3966 i) == 0); 3967 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 3968 0) == 0); 3969 } 3970 3971 /* 3972 * Create pool config based on the best vdev config. 3973 */ 3974 nvlist_dup(best_cfg, &config, KM_SLEEP); 3975 3976 /* 3977 * Put this pool's top-level vdevs into a root vdev. 3978 */ 3979 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3980 &pgid) == 0); 3981 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3982 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3983 VDEV_TYPE_ROOT) == 0); 3984 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3985 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3986 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3987 tops, nchildren) == 0); 3988 3989 /* 3990 * Replace the existing vdev_tree with the new root vdev in 3991 * this pool's configuration (remove the old, add the new). 3992 */ 3993 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3994 3995 /* 3996 * Drop vdev config elements that should not be present at pool level. 3997 */ 3998 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64); 3999 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64); 4000 4001 for (i = 0; i < count; i++) 4002 nvlist_free(configs[i]); 4003 kmem_free(configs, count * sizeof(void *)); 4004 for (i = 0; i < nchildren; i++) 4005 nvlist_free(tops[i]); 4006 kmem_free(tops, nchildren * sizeof(void *)); 4007 nvlist_free(nvroot); 4008 return (config); 4009} 4010 4011int 4012spa_import_rootpool(const char *name) 4013{ 4014 spa_t *spa; 4015 vdev_t *rvd, *bvd, *avd = NULL; 4016 nvlist_t *config, *nvtop; 4017 uint64_t txg; 4018 char *pname; 4019 int error; 4020 4021 /* 4022 * Read the label from the boot device and generate a configuration. 4023 */ 4024 config = spa_generate_rootconf(name); 4025 4026 mutex_enter(&spa_namespace_lock); 4027 if (config != NULL) { 4028 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 4029 &pname) == 0 && strcmp(name, pname) == 0); 4030 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) 4031 == 0); 4032 4033 if ((spa = spa_lookup(pname)) != NULL) { 4034 /* 4035 * Remove the existing root pool from the namespace so 4036 * that we can replace it with the correct config 4037 * we just read in. 4038 */ 4039 spa_remove(spa); 4040 } 4041 spa = spa_add(pname, config, NULL); 4042 4043 /* 4044 * Set spa_ubsync.ub_version as it can be used in vdev_alloc() 4045 * via spa_version(). 4046 */ 4047 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 4048 &spa->spa_ubsync.ub_version) != 0) 4049 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 4050 } else if ((spa = spa_lookup(name)) == NULL) { 4051 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'", 4052 name); 4053 return (EIO); 4054 } else { 4055 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0); 4056 } 4057 spa->spa_is_root = B_TRUE; 4058 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 4059 4060 /* 4061 * Build up a vdev tree based on the boot device's label config. 4062 */ 4063 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4064 &nvtop) == 0); 4065 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4066 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 4067 VDEV_ALLOC_ROOTPOOL); 4068 spa_config_exit(spa, SCL_ALL, FTAG); 4069 if (error) { 4070 mutex_exit(&spa_namespace_lock); 4071 nvlist_free(config); 4072 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 4073 pname); 4074 return (error); 4075 } 4076 4077 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4078 vdev_free(rvd); 4079 spa_config_exit(spa, SCL_ALL, FTAG); 4080 mutex_exit(&spa_namespace_lock); 4081 4082 nvlist_free(config); 4083 return (0); 4084} 4085 4086#endif /* sun */ 4087#endif 4088 4089/* 4090 * Import a non-root pool into the system. 4091 */ 4092int 4093spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 4094{ 4095 spa_t *spa; 4096 char *altroot = NULL; 4097 spa_load_state_t state = SPA_LOAD_IMPORT; 4098 zpool_rewind_policy_t policy; 4099 uint64_t mode = spa_mode_global; 4100 uint64_t readonly = B_FALSE; 4101 int error; 4102 nvlist_t *nvroot; 4103 nvlist_t **spares, **l2cache; 4104 uint_t nspares, nl2cache; 4105 4106 /* 4107 * If a pool with this name exists, return failure. 4108 */ 4109 mutex_enter(&spa_namespace_lock); 4110 if (spa_lookup(pool) != NULL) { 4111 mutex_exit(&spa_namespace_lock); 4112 return (SET_ERROR(EEXIST)); 4113 } 4114 4115 /* 4116 * Create and initialize the spa structure. 4117 */ 4118 (void) nvlist_lookup_string(props, 4119 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 4120 (void) nvlist_lookup_uint64(props, 4121 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 4122 if (readonly) 4123 mode = FREAD; 4124 spa = spa_add(pool, config, altroot); 4125 spa->spa_import_flags = flags; 4126 4127 /* 4128 * Verbatim import - Take a pool and insert it into the namespace 4129 * as if it had been loaded at boot. 4130 */ 4131 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 4132 if (props != NULL) 4133 spa_configfile_set(spa, props, B_FALSE); 4134 4135 spa_config_sync(spa, B_FALSE, B_TRUE); 4136 4137 mutex_exit(&spa_namespace_lock); 4138 return (0); 4139 } 4140 4141 spa_activate(spa, mode); 4142 4143 /* 4144 * Don't start async tasks until we know everything is healthy. 4145 */ 4146 spa_async_suspend(spa); 4147 4148 zpool_get_rewind_policy(config, &policy); 4149 if (policy.zrp_request & ZPOOL_DO_REWIND) 4150 state = SPA_LOAD_RECOVER; 4151 4152 /* 4153 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig 4154 * because the user-supplied config is actually the one to trust when 4155 * doing an import. 4156 */ 4157 if (state != SPA_LOAD_RECOVER) 4158 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 4159 4160 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, 4161 policy.zrp_request); 4162 4163 /* 4164 * Propagate anything learned while loading the pool and pass it 4165 * back to caller (i.e. rewind info, missing devices, etc). 4166 */ 4167 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4168 spa->spa_load_info) == 0); 4169 4170 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4171 /* 4172 * Toss any existing sparelist, as it doesn't have any validity 4173 * anymore, and conflicts with spa_has_spare(). 4174 */ 4175 if (spa->spa_spares.sav_config) { 4176 nvlist_free(spa->spa_spares.sav_config); 4177 spa->spa_spares.sav_config = NULL; 4178 spa_load_spares(spa); 4179 } 4180 if (spa->spa_l2cache.sav_config) { 4181 nvlist_free(spa->spa_l2cache.sav_config); 4182 spa->spa_l2cache.sav_config = NULL; 4183 spa_load_l2cache(spa); 4184 } 4185 4186 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4187 &nvroot) == 0); 4188 if (error == 0) 4189 error = spa_validate_aux(spa, nvroot, -1ULL, 4190 VDEV_ALLOC_SPARE); 4191 if (error == 0) 4192 error = spa_validate_aux(spa, nvroot, -1ULL, 4193 VDEV_ALLOC_L2CACHE); 4194 spa_config_exit(spa, SCL_ALL, FTAG); 4195 4196 if (props != NULL) 4197 spa_configfile_set(spa, props, B_FALSE); 4198 4199 if (error != 0 || (props && spa_writeable(spa) && 4200 (error = spa_prop_set(spa, props)))) { 4201 spa_unload(spa); 4202 spa_deactivate(spa); 4203 spa_remove(spa); 4204 mutex_exit(&spa_namespace_lock); 4205 return (error); 4206 } 4207 4208 spa_async_resume(spa); 4209 4210 /* 4211 * Override any spares and level 2 cache devices as specified by 4212 * the user, as these may have correct device names/devids, etc. 4213 */ 4214 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 4215 &spares, &nspares) == 0) { 4216 if (spa->spa_spares.sav_config) 4217 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 4218 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 4219 else 4220 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 4221 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4222 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 4223 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 4224 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4225 spa_load_spares(spa); 4226 spa_config_exit(spa, SCL_ALL, FTAG); 4227 spa->spa_spares.sav_sync = B_TRUE; 4228 } 4229 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 4230 &l2cache, &nl2cache) == 0) { 4231 if (spa->spa_l2cache.sav_config) 4232 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 4233 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 4234 else 4235 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 4236 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4237 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 4238 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 4239 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4240 spa_load_l2cache(spa); 4241 spa_config_exit(spa, SCL_ALL, FTAG); 4242 spa->spa_l2cache.sav_sync = B_TRUE; 4243 } 4244 4245 /* 4246 * Check for any removed devices. 4247 */ 4248 if (spa->spa_autoreplace) { 4249 spa_aux_check_removed(&spa->spa_spares); 4250 spa_aux_check_removed(&spa->spa_l2cache); 4251 } 4252 4253 if (spa_writeable(spa)) { 4254 /* 4255 * Update the config cache to include the newly-imported pool. 4256 */ 4257 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4258 } 4259 4260 /* 4261 * It's possible that the pool was expanded while it was exported. 4262 * We kick off an async task to handle this for us. 4263 */ 4264 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 4265 4266 mutex_exit(&spa_namespace_lock); 4267 spa_history_log_version(spa, "import"); 4268 4269#ifdef __FreeBSD__ 4270#ifdef _KERNEL 4271 zvol_create_minors(pool); 4272#endif 4273#endif 4274 return (0); 4275} 4276 4277nvlist_t * 4278spa_tryimport(nvlist_t *tryconfig) 4279{ 4280 nvlist_t *config = NULL; 4281 char *poolname; 4282 spa_t *spa; 4283 uint64_t state; 4284 int error; 4285 4286 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 4287 return (NULL); 4288 4289 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 4290 return (NULL); 4291 4292 /* 4293 * Create and initialize the spa structure. 4294 */ 4295 mutex_enter(&spa_namespace_lock); 4296 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 4297 spa_activate(spa, FREAD); 4298 4299 /* 4300 * Pass off the heavy lifting to spa_load(). 4301 * Pass TRUE for mosconfig because the user-supplied config 4302 * is actually the one to trust when doing an import. 4303 */ 4304 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); 4305 4306 /* 4307 * If 'tryconfig' was at least parsable, return the current config. 4308 */ 4309 if (spa->spa_root_vdev != NULL) { 4310 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4311 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 4312 poolname) == 0); 4313 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 4314 state) == 0); 4315 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 4316 spa->spa_uberblock.ub_timestamp) == 0); 4317 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4318 spa->spa_load_info) == 0); 4319 4320 /* 4321 * If the bootfs property exists on this pool then we 4322 * copy it out so that external consumers can tell which 4323 * pools are bootable. 4324 */ 4325 if ((!error || error == EEXIST) && spa->spa_bootfs) { 4326 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4327 4328 /* 4329 * We have to play games with the name since the 4330 * pool was opened as TRYIMPORT_NAME. 4331 */ 4332 if (dsl_dsobj_to_dsname(spa_name(spa), 4333 spa->spa_bootfs, tmpname) == 0) { 4334 char *cp; 4335 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4336 4337 cp = strchr(tmpname, '/'); 4338 if (cp == NULL) { 4339 (void) strlcpy(dsname, tmpname, 4340 MAXPATHLEN); 4341 } else { 4342 (void) snprintf(dsname, MAXPATHLEN, 4343 "%s/%s", poolname, ++cp); 4344 } 4345 VERIFY(nvlist_add_string(config, 4346 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 4347 kmem_free(dsname, MAXPATHLEN); 4348 } 4349 kmem_free(tmpname, MAXPATHLEN); 4350 } 4351 4352 /* 4353 * Add the list of hot spares and level 2 cache devices. 4354 */ 4355 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4356 spa_add_spares(spa, config); 4357 spa_add_l2cache(spa, config); 4358 spa_config_exit(spa, SCL_CONFIG, FTAG); 4359 } 4360 4361 spa_unload(spa); 4362 spa_deactivate(spa); 4363 spa_remove(spa); 4364 mutex_exit(&spa_namespace_lock); 4365 4366 return (config); 4367} 4368 4369/* 4370 * Pool export/destroy 4371 * 4372 * The act of destroying or exporting a pool is very simple. We make sure there 4373 * is no more pending I/O and any references to the pool are gone. Then, we 4374 * update the pool state and sync all the labels to disk, removing the 4375 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 4376 * we don't sync the labels or remove the configuration cache. 4377 */ 4378static int 4379spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 4380 boolean_t force, boolean_t hardforce) 4381{ 4382 spa_t *spa; 4383 4384 if (oldconfig) 4385 *oldconfig = NULL; 4386 4387 if (!(spa_mode_global & FWRITE)) 4388 return (SET_ERROR(EROFS)); 4389 4390 mutex_enter(&spa_namespace_lock); 4391 if ((spa = spa_lookup(pool)) == NULL) { 4392 mutex_exit(&spa_namespace_lock); 4393 return (SET_ERROR(ENOENT)); 4394 } 4395 4396 /* 4397 * Put a hold on the pool, drop the namespace lock, stop async tasks, 4398 * reacquire the namespace lock, and see if we can export. 4399 */ 4400 spa_open_ref(spa, FTAG); 4401 mutex_exit(&spa_namespace_lock); 4402 spa_async_suspend(spa); 4403 mutex_enter(&spa_namespace_lock); 4404 spa_close(spa, FTAG); 4405 4406 /* 4407 * The pool will be in core if it's openable, 4408 * in which case we can modify its state. 4409 */ 4410 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 4411 /* 4412 * Objsets may be open only because they're dirty, so we 4413 * have to force it to sync before checking spa_refcnt. 4414 */ 4415 txg_wait_synced(spa->spa_dsl_pool, 0); 4416 4417 /* 4418 * A pool cannot be exported or destroyed if there are active 4419 * references. If we are resetting a pool, allow references by 4420 * fault injection handlers. 4421 */ 4422 if (!spa_refcount_zero(spa) || 4423 (spa->spa_inject_ref != 0 && 4424 new_state != POOL_STATE_UNINITIALIZED)) { 4425 spa_async_resume(spa); 4426 mutex_exit(&spa_namespace_lock); 4427 return (SET_ERROR(EBUSY)); 4428 } 4429 4430 /* 4431 * A pool cannot be exported if it has an active shared spare. 4432 * This is to prevent other pools stealing the active spare 4433 * from an exported pool. At user's own will, such pool can 4434 * be forcedly exported. 4435 */ 4436 if (!force && new_state == POOL_STATE_EXPORTED && 4437 spa_has_active_shared_spare(spa)) { 4438 spa_async_resume(spa); 4439 mutex_exit(&spa_namespace_lock); 4440 return (SET_ERROR(EXDEV)); 4441 } 4442 4443 /* 4444 * We want this to be reflected on every label, 4445 * so mark them all dirty. spa_unload() will do the 4446 * final sync that pushes these changes out. 4447 */ 4448 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 4449 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4450 spa->spa_state = new_state; 4451 spa->spa_final_txg = spa_last_synced_txg(spa) + 4452 TXG_DEFER_SIZE + 1; 4453 vdev_config_dirty(spa->spa_root_vdev); 4454 spa_config_exit(spa, SCL_ALL, FTAG); 4455 } 4456 } 4457 4458 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY); 4459 4460 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 4461 spa_unload(spa); 4462 spa_deactivate(spa); 4463 } 4464 4465 if (oldconfig && spa->spa_config) 4466 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 4467 4468 if (new_state != POOL_STATE_UNINITIALIZED) { 4469 if (!hardforce) 4470 spa_config_sync(spa, B_TRUE, B_TRUE); 4471 spa_remove(spa); 4472 } 4473 mutex_exit(&spa_namespace_lock); 4474 4475 return (0); 4476} 4477 4478/* 4479 * Destroy a storage pool. 4480 */ 4481int 4482spa_destroy(char *pool) 4483{ 4484 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 4485 B_FALSE, B_FALSE)); 4486} 4487 4488/* 4489 * Export a storage pool. 4490 */ 4491int 4492spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 4493 boolean_t hardforce) 4494{ 4495 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 4496 force, hardforce)); 4497} 4498 4499/* 4500 * Similar to spa_export(), this unloads the spa_t without actually removing it 4501 * from the namespace in any way. 4502 */ 4503int 4504spa_reset(char *pool) 4505{ 4506 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 4507 B_FALSE, B_FALSE)); 4508} 4509 4510/* 4511 * ========================================================================== 4512 * Device manipulation 4513 * ========================================================================== 4514 */ 4515 4516/* 4517 * Add a device to a storage pool. 4518 */ 4519int 4520spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 4521{ 4522 uint64_t txg, id; 4523 int error; 4524 vdev_t *rvd = spa->spa_root_vdev; 4525 vdev_t *vd, *tvd; 4526 nvlist_t **spares, **l2cache; 4527 uint_t nspares, nl2cache; 4528 4529 ASSERT(spa_writeable(spa)); 4530 4531 txg = spa_vdev_enter(spa); 4532 4533 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 4534 VDEV_ALLOC_ADD)) != 0) 4535 return (spa_vdev_exit(spa, NULL, txg, error)); 4536 4537 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 4538 4539 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 4540 &nspares) != 0) 4541 nspares = 0; 4542 4543 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 4544 &nl2cache) != 0) 4545 nl2cache = 0; 4546 4547 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 4548 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 4549 4550 if (vd->vdev_children != 0 && 4551 (error = vdev_create(vd, txg, B_FALSE)) != 0) 4552 return (spa_vdev_exit(spa, vd, txg, error)); 4553 4554 /* 4555 * We must validate the spares and l2cache devices after checking the 4556 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 4557 */ 4558 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 4559 return (spa_vdev_exit(spa, vd, txg, error)); 4560 4561 /* 4562 * Transfer each new top-level vdev from vd to rvd. 4563 */ 4564 for (int c = 0; c < vd->vdev_children; c++) { 4565 4566 /* 4567 * Set the vdev id to the first hole, if one exists. 4568 */ 4569 for (id = 0; id < rvd->vdev_children; id++) { 4570 if (rvd->vdev_child[id]->vdev_ishole) { 4571 vdev_free(rvd->vdev_child[id]); 4572 break; 4573 } 4574 } 4575 tvd = vd->vdev_child[c]; 4576 vdev_remove_child(vd, tvd); 4577 tvd->vdev_id = id; 4578 vdev_add_child(rvd, tvd); 4579 vdev_config_dirty(tvd); 4580 } 4581 4582 if (nspares != 0) { 4583 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 4584 ZPOOL_CONFIG_SPARES); 4585 spa_load_spares(spa); 4586 spa->spa_spares.sav_sync = B_TRUE; 4587 } 4588 4589 if (nl2cache != 0) { 4590 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 4591 ZPOOL_CONFIG_L2CACHE); 4592 spa_load_l2cache(spa); 4593 spa->spa_l2cache.sav_sync = B_TRUE; 4594 } 4595 4596 /* 4597 * We have to be careful when adding new vdevs to an existing pool. 4598 * If other threads start allocating from these vdevs before we 4599 * sync the config cache, and we lose power, then upon reboot we may 4600 * fail to open the pool because there are DVAs that the config cache 4601 * can't translate. Therefore, we first add the vdevs without 4602 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 4603 * and then let spa_config_update() initialize the new metaslabs. 4604 * 4605 * spa_load() checks for added-but-not-initialized vdevs, so that 4606 * if we lose power at any point in this sequence, the remaining 4607 * steps will be completed the next time we load the pool. 4608 */ 4609 (void) spa_vdev_exit(spa, vd, txg, 0); 4610 4611 mutex_enter(&spa_namespace_lock); 4612 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4613 mutex_exit(&spa_namespace_lock); 4614 4615 return (0); 4616} 4617 4618/* 4619 * Attach a device to a mirror. The arguments are the path to any device 4620 * in the mirror, and the nvroot for the new device. If the path specifies 4621 * a device that is not mirrored, we automatically insert the mirror vdev. 4622 * 4623 * If 'replacing' is specified, the new device is intended to replace the 4624 * existing device; in this case the two devices are made into their own 4625 * mirror using the 'replacing' vdev, which is functionally identical to 4626 * the mirror vdev (it actually reuses all the same ops) but has a few 4627 * extra rules: you can't attach to it after it's been created, and upon 4628 * completion of resilvering, the first disk (the one being replaced) 4629 * is automatically detached. 4630 */ 4631int 4632spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 4633{ 4634 uint64_t txg, dtl_max_txg; 4635 vdev_t *rvd = spa->spa_root_vdev; 4636 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 4637 vdev_ops_t *pvops; 4638 char *oldvdpath, *newvdpath; 4639 int newvd_isspare; 4640 int error; 4641 4642 ASSERT(spa_writeable(spa)); 4643 4644 txg = spa_vdev_enter(spa); 4645 4646 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 4647 4648 if (oldvd == NULL) 4649 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4650 4651 if (!oldvd->vdev_ops->vdev_op_leaf) 4652 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4653 4654 pvd = oldvd->vdev_parent; 4655 4656 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 4657 VDEV_ALLOC_ATTACH)) != 0) 4658 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4659 4660 if (newrootvd->vdev_children != 1) 4661 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4662 4663 newvd = newrootvd->vdev_child[0]; 4664 4665 if (!newvd->vdev_ops->vdev_op_leaf) 4666 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4667 4668 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 4669 return (spa_vdev_exit(spa, newrootvd, txg, error)); 4670 4671 /* 4672 * Spares can't replace logs 4673 */ 4674 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 4675 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4676 4677 if (!replacing) { 4678 /* 4679 * For attach, the only allowable parent is a mirror or the root 4680 * vdev. 4681 */ 4682 if (pvd->vdev_ops != &vdev_mirror_ops && 4683 pvd->vdev_ops != &vdev_root_ops) 4684 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4685 4686 pvops = &vdev_mirror_ops; 4687 } else { 4688 /* 4689 * Active hot spares can only be replaced by inactive hot 4690 * spares. 4691 */ 4692 if (pvd->vdev_ops == &vdev_spare_ops && 4693 oldvd->vdev_isspare && 4694 !spa_has_spare(spa, newvd->vdev_guid)) 4695 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4696 4697 /* 4698 * If the source is a hot spare, and the parent isn't already a 4699 * spare, then we want to create a new hot spare. Otherwise, we 4700 * want to create a replacing vdev. The user is not allowed to 4701 * attach to a spared vdev child unless the 'isspare' state is 4702 * the same (spare replaces spare, non-spare replaces 4703 * non-spare). 4704 */ 4705 if (pvd->vdev_ops == &vdev_replacing_ops && 4706 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 4707 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4708 } else if (pvd->vdev_ops == &vdev_spare_ops && 4709 newvd->vdev_isspare != oldvd->vdev_isspare) { 4710 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4711 } 4712 4713 if (newvd->vdev_isspare) 4714 pvops = &vdev_spare_ops; 4715 else 4716 pvops = &vdev_replacing_ops; 4717 } 4718 4719 /* 4720 * Make sure the new device is big enough. 4721 */ 4722 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 4723 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 4724 4725 /* 4726 * The new device cannot have a higher alignment requirement 4727 * than the top-level vdev. 4728 */ 4729 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 4730 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 4731 4732 /* 4733 * If this is an in-place replacement, update oldvd's path and devid 4734 * to make it distinguishable from newvd, and unopenable from now on. 4735 */ 4736 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 4737 spa_strfree(oldvd->vdev_path); 4738 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 4739 KM_SLEEP); 4740 (void) sprintf(oldvd->vdev_path, "%s/%s", 4741 newvd->vdev_path, "old"); 4742 if (oldvd->vdev_devid != NULL) { 4743 spa_strfree(oldvd->vdev_devid); 4744 oldvd->vdev_devid = NULL; 4745 } 4746 } 4747 4748 /* mark the device being resilvered */ 4749 newvd->vdev_resilver_txg = txg; 4750 4751 /* 4752 * If the parent is not a mirror, or if we're replacing, insert the new 4753 * mirror/replacing/spare vdev above oldvd. 4754 */ 4755 if (pvd->vdev_ops != pvops) 4756 pvd = vdev_add_parent(oldvd, pvops); 4757 4758 ASSERT(pvd->vdev_top->vdev_parent == rvd); 4759 ASSERT(pvd->vdev_ops == pvops); 4760 ASSERT(oldvd->vdev_parent == pvd); 4761 4762 /* 4763 * Extract the new device from its root and add it to pvd. 4764 */ 4765 vdev_remove_child(newrootvd, newvd); 4766 newvd->vdev_id = pvd->vdev_children; 4767 newvd->vdev_crtxg = oldvd->vdev_crtxg; 4768 vdev_add_child(pvd, newvd); 4769 4770 tvd = newvd->vdev_top; 4771 ASSERT(pvd->vdev_top == tvd); 4772 ASSERT(tvd->vdev_parent == rvd); 4773 4774 vdev_config_dirty(tvd); 4775 4776 /* 4777 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 4778 * for any dmu_sync-ed blocks. It will propagate upward when 4779 * spa_vdev_exit() calls vdev_dtl_reassess(). 4780 */ 4781 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 4782 4783 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 4784 dtl_max_txg - TXG_INITIAL); 4785 4786 if (newvd->vdev_isspare) { 4787 spa_spare_activate(newvd); 4788 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE); 4789 } 4790 4791 oldvdpath = spa_strdup(oldvd->vdev_path); 4792 newvdpath = spa_strdup(newvd->vdev_path); 4793 newvd_isspare = newvd->vdev_isspare; 4794 4795 /* 4796 * Mark newvd's DTL dirty in this txg. 4797 */ 4798 vdev_dirty(tvd, VDD_DTL, newvd, txg); 4799 4800 /* 4801 * Schedule the resilver to restart in the future. We do this to 4802 * ensure that dmu_sync-ed blocks have been stitched into the 4803 * respective datasets. 4804 */ 4805 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); 4806 4807 /* 4808 * Commit the config 4809 */ 4810 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 4811 4812 spa_history_log_internal(spa, "vdev attach", NULL, 4813 "%s vdev=%s %s vdev=%s", 4814 replacing && newvd_isspare ? "spare in" : 4815 replacing ? "replace" : "attach", newvdpath, 4816 replacing ? "for" : "to", oldvdpath); 4817 4818 spa_strfree(oldvdpath); 4819 spa_strfree(newvdpath); 4820 4821 if (spa->spa_bootfs) 4822 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH); 4823 4824 return (0); 4825} 4826 4827/* 4828 * Detach a device from a mirror or replacing vdev. 4829 * 4830 * If 'replace_done' is specified, only detach if the parent 4831 * is a replacing vdev. 4832 */ 4833int 4834spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 4835{ 4836 uint64_t txg; 4837 int error; 4838 vdev_t *rvd = spa->spa_root_vdev; 4839 vdev_t *vd, *pvd, *cvd, *tvd; 4840 boolean_t unspare = B_FALSE; 4841 uint64_t unspare_guid = 0; 4842 char *vdpath; 4843 4844 ASSERT(spa_writeable(spa)); 4845 4846 txg = spa_vdev_enter(spa); 4847 4848 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 4849 4850 if (vd == NULL) 4851 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4852 4853 if (!vd->vdev_ops->vdev_op_leaf) 4854 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4855 4856 pvd = vd->vdev_parent; 4857 4858 /* 4859 * If the parent/child relationship is not as expected, don't do it. 4860 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 4861 * vdev that's replacing B with C. The user's intent in replacing 4862 * is to go from M(A,B) to M(A,C). If the user decides to cancel 4863 * the replace by detaching C, the expected behavior is to end up 4864 * M(A,B). But suppose that right after deciding to detach C, 4865 * the replacement of B completes. We would have M(A,C), and then 4866 * ask to detach C, which would leave us with just A -- not what 4867 * the user wanted. To prevent this, we make sure that the 4868 * parent/child relationship hasn't changed -- in this example, 4869 * that C's parent is still the replacing vdev R. 4870 */ 4871 if (pvd->vdev_guid != pguid && pguid != 0) 4872 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4873 4874 /* 4875 * Only 'replacing' or 'spare' vdevs can be replaced. 4876 */ 4877 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 4878 pvd->vdev_ops != &vdev_spare_ops) 4879 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4880 4881 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 4882 spa_version(spa) >= SPA_VERSION_SPARES); 4883 4884 /* 4885 * Only mirror, replacing, and spare vdevs support detach. 4886 */ 4887 if (pvd->vdev_ops != &vdev_replacing_ops && 4888 pvd->vdev_ops != &vdev_mirror_ops && 4889 pvd->vdev_ops != &vdev_spare_ops) 4890 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4891 4892 /* 4893 * If this device has the only valid copy of some data, 4894 * we cannot safely detach it. 4895 */ 4896 if (vdev_dtl_required(vd)) 4897 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4898 4899 ASSERT(pvd->vdev_children >= 2); 4900 4901 /* 4902 * If we are detaching the second disk from a replacing vdev, then 4903 * check to see if we changed the original vdev's path to have "/old" 4904 * at the end in spa_vdev_attach(). If so, undo that change now. 4905 */ 4906 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 4907 vd->vdev_path != NULL) { 4908 size_t len = strlen(vd->vdev_path); 4909 4910 for (int c = 0; c < pvd->vdev_children; c++) { 4911 cvd = pvd->vdev_child[c]; 4912 4913 if (cvd == vd || cvd->vdev_path == NULL) 4914 continue; 4915 4916 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 4917 strcmp(cvd->vdev_path + len, "/old") == 0) { 4918 spa_strfree(cvd->vdev_path); 4919 cvd->vdev_path = spa_strdup(vd->vdev_path); 4920 break; 4921 } 4922 } 4923 } 4924 4925 /* 4926 * If we are detaching the original disk from a spare, then it implies 4927 * that the spare should become a real disk, and be removed from the 4928 * active spare list for the pool. 4929 */ 4930 if (pvd->vdev_ops == &vdev_spare_ops && 4931 vd->vdev_id == 0 && 4932 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 4933 unspare = B_TRUE; 4934 4935 /* 4936 * Erase the disk labels so the disk can be used for other things. 4937 * This must be done after all other error cases are handled, 4938 * but before we disembowel vd (so we can still do I/O to it). 4939 * But if we can't do it, don't treat the error as fatal -- 4940 * it may be that the unwritability of the disk is the reason 4941 * it's being detached! 4942 */ 4943 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 4944 4945 /* 4946 * Remove vd from its parent and compact the parent's children. 4947 */ 4948 vdev_remove_child(pvd, vd); 4949 vdev_compact_children(pvd); 4950 4951 /* 4952 * Remember one of the remaining children so we can get tvd below. 4953 */ 4954 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 4955 4956 /* 4957 * If we need to remove the remaining child from the list of hot spares, 4958 * do it now, marking the vdev as no longer a spare in the process. 4959 * We must do this before vdev_remove_parent(), because that can 4960 * change the GUID if it creates a new toplevel GUID. For a similar 4961 * reason, we must remove the spare now, in the same txg as the detach; 4962 * otherwise someone could attach a new sibling, change the GUID, and 4963 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 4964 */ 4965 if (unspare) { 4966 ASSERT(cvd->vdev_isspare); 4967 spa_spare_remove(cvd); 4968 unspare_guid = cvd->vdev_guid; 4969 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 4970 cvd->vdev_unspare = B_TRUE; 4971 } 4972 4973 /* 4974 * If the parent mirror/replacing vdev only has one child, 4975 * the parent is no longer needed. Remove it from the tree. 4976 */ 4977 if (pvd->vdev_children == 1) { 4978 if (pvd->vdev_ops == &vdev_spare_ops) 4979 cvd->vdev_unspare = B_FALSE; 4980 vdev_remove_parent(cvd); 4981 } 4982 4983 4984 /* 4985 * We don't set tvd until now because the parent we just removed 4986 * may have been the previous top-level vdev. 4987 */ 4988 tvd = cvd->vdev_top; 4989 ASSERT(tvd->vdev_parent == rvd); 4990 4991 /* 4992 * Reevaluate the parent vdev state. 4993 */ 4994 vdev_propagate_state(cvd); 4995 4996 /* 4997 * If the 'autoexpand' property is set on the pool then automatically 4998 * try to expand the size of the pool. For example if the device we 4999 * just detached was smaller than the others, it may be possible to 5000 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 5001 * first so that we can obtain the updated sizes of the leaf vdevs. 5002 */ 5003 if (spa->spa_autoexpand) { 5004 vdev_reopen(tvd); 5005 vdev_expand(tvd, txg); 5006 } 5007 5008 vdev_config_dirty(tvd); 5009 5010 /* 5011 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 5012 * vd->vdev_detached is set and free vd's DTL object in syncing context. 5013 * But first make sure we're not on any *other* txg's DTL list, to 5014 * prevent vd from being accessed after it's freed. 5015 */ 5016 vdpath = spa_strdup(vd->vdev_path); 5017 for (int t = 0; t < TXG_SIZE; t++) 5018 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 5019 vd->vdev_detached = B_TRUE; 5020 vdev_dirty(tvd, VDD_DTL, vd, txg); 5021 5022 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE); 5023 5024 /* hang on to the spa before we release the lock */ 5025 spa_open_ref(spa, FTAG); 5026 5027 error = spa_vdev_exit(spa, vd, txg, 0); 5028 5029 spa_history_log_internal(spa, "detach", NULL, 5030 "vdev=%s", vdpath); 5031 spa_strfree(vdpath); 5032 5033 /* 5034 * If this was the removal of the original device in a hot spare vdev, 5035 * then we want to go through and remove the device from the hot spare 5036 * list of every other pool. 5037 */ 5038 if (unspare) { 5039 spa_t *altspa = NULL; 5040 5041 mutex_enter(&spa_namespace_lock); 5042 while ((altspa = spa_next(altspa)) != NULL) { 5043 if (altspa->spa_state != POOL_STATE_ACTIVE || 5044 altspa == spa) 5045 continue; 5046 5047 spa_open_ref(altspa, FTAG); 5048 mutex_exit(&spa_namespace_lock); 5049 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 5050 mutex_enter(&spa_namespace_lock); 5051 spa_close(altspa, FTAG); 5052 } 5053 mutex_exit(&spa_namespace_lock); 5054 5055 /* search the rest of the vdevs for spares to remove */ 5056 spa_vdev_resilver_done(spa); 5057 } 5058 5059 /* all done with the spa; OK to release */ 5060 mutex_enter(&spa_namespace_lock); 5061 spa_close(spa, FTAG); 5062 mutex_exit(&spa_namespace_lock); 5063 5064 return (error); 5065} 5066 5067/* 5068 * Split a set of devices from their mirrors, and create a new pool from them. 5069 */ 5070int 5071spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 5072 nvlist_t *props, boolean_t exp) 5073{ 5074 int error = 0; 5075 uint64_t txg, *glist; 5076 spa_t *newspa; 5077 uint_t c, children, lastlog; 5078 nvlist_t **child, *nvl, *tmp; 5079 dmu_tx_t *tx; 5080 char *altroot = NULL; 5081 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 5082 boolean_t activate_slog; 5083 5084 ASSERT(spa_writeable(spa)); 5085 5086 txg = spa_vdev_enter(spa); 5087 5088 /* clear the log and flush everything up to now */ 5089 activate_slog = spa_passivate_log(spa); 5090 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5091 error = spa_offline_log(spa); 5092 txg = spa_vdev_config_enter(spa); 5093 5094 if (activate_slog) 5095 spa_activate_log(spa); 5096 5097 if (error != 0) 5098 return (spa_vdev_exit(spa, NULL, txg, error)); 5099 5100 /* check new spa name before going any further */ 5101 if (spa_lookup(newname) != NULL) 5102 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 5103 5104 /* 5105 * scan through all the children to ensure they're all mirrors 5106 */ 5107 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 5108 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 5109 &children) != 0) 5110 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5111 5112 /* first, check to ensure we've got the right child count */ 5113 rvd = spa->spa_root_vdev; 5114 lastlog = 0; 5115 for (c = 0; c < rvd->vdev_children; c++) { 5116 vdev_t *vd = rvd->vdev_child[c]; 5117 5118 /* don't count the holes & logs as children */ 5119 if (vd->vdev_islog || vd->vdev_ishole) { 5120 if (lastlog == 0) 5121 lastlog = c; 5122 continue; 5123 } 5124 5125 lastlog = 0; 5126 } 5127 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 5128 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5129 5130 /* next, ensure no spare or cache devices are part of the split */ 5131 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 5132 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 5133 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5134 5135 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 5136 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 5137 5138 /* then, loop over each vdev and validate it */ 5139 for (c = 0; c < children; c++) { 5140 uint64_t is_hole = 0; 5141 5142 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 5143 &is_hole); 5144 5145 if (is_hole != 0) { 5146 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 5147 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 5148 continue; 5149 } else { 5150 error = SET_ERROR(EINVAL); 5151 break; 5152 } 5153 } 5154 5155 /* which disk is going to be split? */ 5156 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 5157 &glist[c]) != 0) { 5158 error = SET_ERROR(EINVAL); 5159 break; 5160 } 5161 5162 /* look it up in the spa */ 5163 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 5164 if (vml[c] == NULL) { 5165 error = SET_ERROR(ENODEV); 5166 break; 5167 } 5168 5169 /* make sure there's nothing stopping the split */ 5170 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 5171 vml[c]->vdev_islog || 5172 vml[c]->vdev_ishole || 5173 vml[c]->vdev_isspare || 5174 vml[c]->vdev_isl2cache || 5175 !vdev_writeable(vml[c]) || 5176 vml[c]->vdev_children != 0 || 5177 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 5178 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 5179 error = SET_ERROR(EINVAL); 5180 break; 5181 } 5182 5183 if (vdev_dtl_required(vml[c])) { 5184 error = SET_ERROR(EBUSY); 5185 break; 5186 } 5187 5188 /* we need certain info from the top level */ 5189 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 5190 vml[c]->vdev_top->vdev_ms_array) == 0); 5191 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 5192 vml[c]->vdev_top->vdev_ms_shift) == 0); 5193 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 5194 vml[c]->vdev_top->vdev_asize) == 0); 5195 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 5196 vml[c]->vdev_top->vdev_ashift) == 0); 5197 } 5198 5199 if (error != 0) { 5200 kmem_free(vml, children * sizeof (vdev_t *)); 5201 kmem_free(glist, children * sizeof (uint64_t)); 5202 return (spa_vdev_exit(spa, NULL, txg, error)); 5203 } 5204 5205 /* stop writers from using the disks */ 5206 for (c = 0; c < children; c++) { 5207 if (vml[c] != NULL) 5208 vml[c]->vdev_offline = B_TRUE; 5209 } 5210 vdev_reopen(spa->spa_root_vdev); 5211 5212 /* 5213 * Temporarily record the splitting vdevs in the spa config. This 5214 * will disappear once the config is regenerated. 5215 */ 5216 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5217 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 5218 glist, children) == 0); 5219 kmem_free(glist, children * sizeof (uint64_t)); 5220 5221 mutex_enter(&spa->spa_props_lock); 5222 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 5223 nvl) == 0); 5224 mutex_exit(&spa->spa_props_lock); 5225 spa->spa_config_splitting = nvl; 5226 vdev_config_dirty(spa->spa_root_vdev); 5227 5228 /* configure and create the new pool */ 5229 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 5230 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 5231 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 5232 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 5233 spa_version(spa)) == 0); 5234 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 5235 spa->spa_config_txg) == 0); 5236 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 5237 spa_generate_guid(NULL)) == 0); 5238 (void) nvlist_lookup_string(props, 5239 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5240 5241 /* add the new pool to the namespace */ 5242 newspa = spa_add(newname, config, altroot); 5243 newspa->spa_config_txg = spa->spa_config_txg; 5244 spa_set_log_state(newspa, SPA_LOG_CLEAR); 5245 5246 /* release the spa config lock, retaining the namespace lock */ 5247 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5248 5249 if (zio_injection_enabled) 5250 zio_handle_panic_injection(spa, FTAG, 1); 5251 5252 spa_activate(newspa, spa_mode_global); 5253 spa_async_suspend(newspa); 5254 5255#ifndef sun 5256 /* mark that we are creating new spa by splitting */ 5257 newspa->spa_splitting_newspa = B_TRUE; 5258#endif 5259 /* create the new pool from the disks of the original pool */ 5260 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); 5261#ifndef sun 5262 newspa->spa_splitting_newspa = B_FALSE; 5263#endif 5264 if (error) 5265 goto out; 5266 5267 /* if that worked, generate a real config for the new pool */ 5268 if (newspa->spa_root_vdev != NULL) { 5269 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 5270 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5271 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 5272 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 5273 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 5274 B_TRUE)); 5275 } 5276 5277 /* set the props */ 5278 if (props != NULL) { 5279 spa_configfile_set(newspa, props, B_FALSE); 5280 error = spa_prop_set(newspa, props); 5281 if (error) 5282 goto out; 5283 } 5284 5285 /* flush everything */ 5286 txg = spa_vdev_config_enter(newspa); 5287 vdev_config_dirty(newspa->spa_root_vdev); 5288 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 5289 5290 if (zio_injection_enabled) 5291 zio_handle_panic_injection(spa, FTAG, 2); 5292 5293 spa_async_resume(newspa); 5294 5295 /* finally, update the original pool's config */ 5296 txg = spa_vdev_config_enter(spa); 5297 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 5298 error = dmu_tx_assign(tx, TXG_WAIT); 5299 if (error != 0) 5300 dmu_tx_abort(tx); 5301 for (c = 0; c < children; c++) { 5302 if (vml[c] != NULL) { 5303 vdev_split(vml[c]); 5304 if (error == 0) 5305 spa_history_log_internal(spa, "detach", tx, 5306 "vdev=%s", vml[c]->vdev_path); 5307 vdev_free(vml[c]); 5308 } 5309 } 5310 vdev_config_dirty(spa->spa_root_vdev); 5311 spa->spa_config_splitting = NULL; 5312 nvlist_free(nvl); 5313 if (error == 0) 5314 dmu_tx_commit(tx); 5315 (void) spa_vdev_exit(spa, NULL, txg, 0); 5316 5317 if (zio_injection_enabled) 5318 zio_handle_panic_injection(spa, FTAG, 3); 5319 5320 /* split is complete; log a history record */ 5321 spa_history_log_internal(newspa, "split", NULL, 5322 "from pool %s", spa_name(spa)); 5323 5324 kmem_free(vml, children * sizeof (vdev_t *)); 5325 5326 /* if we're not going to mount the filesystems in userland, export */ 5327 if (exp) 5328 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 5329 B_FALSE, B_FALSE); 5330 5331 return (error); 5332 5333out: 5334 spa_unload(newspa); 5335 spa_deactivate(newspa); 5336 spa_remove(newspa); 5337 5338 txg = spa_vdev_config_enter(spa); 5339 5340 /* re-online all offlined disks */ 5341 for (c = 0; c < children; c++) { 5342 if (vml[c] != NULL) 5343 vml[c]->vdev_offline = B_FALSE; 5344 } 5345 vdev_reopen(spa->spa_root_vdev); 5346 5347 nvlist_free(spa->spa_config_splitting); 5348 spa->spa_config_splitting = NULL; 5349 (void) spa_vdev_exit(spa, NULL, txg, error); 5350 5351 kmem_free(vml, children * sizeof (vdev_t *)); 5352 return (error); 5353} 5354 5355static nvlist_t * 5356spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) 5357{ 5358 for (int i = 0; i < count; i++) { 5359 uint64_t guid; 5360 5361 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, 5362 &guid) == 0); 5363 5364 if (guid == target_guid) 5365 return (nvpp[i]); 5366 } 5367 5368 return (NULL); 5369} 5370 5371static void 5372spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, 5373 nvlist_t *dev_to_remove) 5374{ 5375 nvlist_t **newdev = NULL; 5376 5377 if (count > 1) 5378 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); 5379 5380 for (int i = 0, j = 0; i < count; i++) { 5381 if (dev[i] == dev_to_remove) 5382 continue; 5383 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); 5384 } 5385 5386 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); 5387 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); 5388 5389 for (int i = 0; i < count - 1; i++) 5390 nvlist_free(newdev[i]); 5391 5392 if (count > 1) 5393 kmem_free(newdev, (count - 1) * sizeof (void *)); 5394} 5395 5396/* 5397 * Evacuate the device. 5398 */ 5399static int 5400spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) 5401{ 5402 uint64_t txg; 5403 int error = 0; 5404 5405 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5406 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5407 ASSERT(vd == vd->vdev_top); 5408 5409 /* 5410 * Evacuate the device. We don't hold the config lock as writer 5411 * since we need to do I/O but we do keep the 5412 * spa_namespace_lock held. Once this completes the device 5413 * should no longer have any blocks allocated on it. 5414 */ 5415 if (vd->vdev_islog) { 5416 if (vd->vdev_stat.vs_alloc != 0) 5417 error = spa_offline_log(spa); 5418 } else { 5419 error = SET_ERROR(ENOTSUP); 5420 } 5421 5422 if (error) 5423 return (error); 5424 5425 /* 5426 * The evacuation succeeded. Remove any remaining MOS metadata 5427 * associated with this vdev, and wait for these changes to sync. 5428 */ 5429 ASSERT0(vd->vdev_stat.vs_alloc); 5430 txg = spa_vdev_config_enter(spa); 5431 vd->vdev_removing = B_TRUE; 5432 vdev_dirty_leaves(vd, VDD_DTL, txg); 5433 vdev_config_dirty(vd); 5434 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5435 5436 return (0); 5437} 5438 5439/* 5440 * Complete the removal by cleaning up the namespace. 5441 */ 5442static void 5443spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd) 5444{ 5445 vdev_t *rvd = spa->spa_root_vdev; 5446 uint64_t id = vd->vdev_id; 5447 boolean_t last_vdev = (id == (rvd->vdev_children - 1)); 5448 5449 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5450 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 5451 ASSERT(vd == vd->vdev_top); 5452 5453 /* 5454 * Only remove any devices which are empty. 5455 */ 5456 if (vd->vdev_stat.vs_alloc != 0) 5457 return; 5458 5459 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 5460 5461 if (list_link_active(&vd->vdev_state_dirty_node)) 5462 vdev_state_clean(vd); 5463 if (list_link_active(&vd->vdev_config_dirty_node)) 5464 vdev_config_clean(vd); 5465 5466 vdev_free(vd); 5467 5468 if (last_vdev) { 5469 vdev_compact_children(rvd); 5470 } else { 5471 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); 5472 vdev_add_child(rvd, vd); 5473 } 5474 vdev_config_dirty(rvd); 5475 5476 /* 5477 * Reassess the health of our root vdev. 5478 */ 5479 vdev_reopen(rvd); 5480} 5481 5482/* 5483 * Remove a device from the pool - 5484 * 5485 * Removing a device from the vdev namespace requires several steps 5486 * and can take a significant amount of time. As a result we use 5487 * the spa_vdev_config_[enter/exit] functions which allow us to 5488 * grab and release the spa_config_lock while still holding the namespace 5489 * lock. During each step the configuration is synced out. 5490 * 5491 * Currently, this supports removing only hot spares, slogs, and level 2 ARC 5492 * devices. 5493 */ 5494int 5495spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) 5496{ 5497 vdev_t *vd; 5498 metaslab_group_t *mg; 5499 nvlist_t **spares, **l2cache, *nv; 5500 uint64_t txg = 0; 5501 uint_t nspares, nl2cache; 5502 int error = 0; 5503 boolean_t locked = MUTEX_HELD(&spa_namespace_lock); 5504 5505 ASSERT(spa_writeable(spa)); 5506 5507 if (!locked) 5508 txg = spa_vdev_enter(spa); 5509 5510 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 5511 5512 if (spa->spa_spares.sav_vdevs != NULL && 5513 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 5514 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && 5515 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { 5516 /* 5517 * Only remove the hot spare if it's not currently in use 5518 * in this pool. 5519 */ 5520 if (vd == NULL || unspare) { 5521 spa_vdev_remove_aux(spa->spa_spares.sav_config, 5522 ZPOOL_CONFIG_SPARES, spares, nspares, nv); 5523 spa_load_spares(spa); 5524 spa->spa_spares.sav_sync = B_TRUE; 5525 } else { 5526 error = SET_ERROR(EBUSY); 5527 } 5528 } else if (spa->spa_l2cache.sav_vdevs != NULL && 5529 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 5530 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && 5531 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { 5532 /* 5533 * Cache devices can always be removed. 5534 */ 5535 spa_vdev_remove_aux(spa->spa_l2cache.sav_config, 5536 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); 5537 spa_load_l2cache(spa); 5538 spa->spa_l2cache.sav_sync = B_TRUE; 5539 } else if (vd != NULL && vd->vdev_islog) { 5540 ASSERT(!locked); 5541 ASSERT(vd == vd->vdev_top); 5542 5543 mg = vd->vdev_mg; 5544 5545 /* 5546 * Stop allocating from this vdev. 5547 */ 5548 metaslab_group_passivate(mg); 5549 5550 /* 5551 * Wait for the youngest allocations and frees to sync, 5552 * and then wait for the deferral of those frees to finish. 5553 */ 5554 spa_vdev_config_exit(spa, NULL, 5555 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); 5556 5557 /* 5558 * Attempt to evacuate the vdev. 5559 */ 5560 error = spa_vdev_remove_evacuate(spa, vd); 5561 5562 txg = spa_vdev_config_enter(spa); 5563 5564 /* 5565 * If we couldn't evacuate the vdev, unwind. 5566 */ 5567 if (error) { 5568 metaslab_group_activate(mg); 5569 return (spa_vdev_exit(spa, NULL, txg, error)); 5570 } 5571 5572 /* 5573 * Clean up the vdev namespace. 5574 */ 5575 spa_vdev_remove_from_namespace(spa, vd); 5576 5577 } else if (vd != NULL) { 5578 /* 5579 * Normal vdevs cannot be removed (yet). 5580 */ 5581 error = SET_ERROR(ENOTSUP); 5582 } else { 5583 /* 5584 * There is no vdev of any kind with the specified guid. 5585 */ 5586 error = SET_ERROR(ENOENT); 5587 } 5588 5589 if (!locked) 5590 return (spa_vdev_exit(spa, NULL, txg, error)); 5591 5592 return (error); 5593} 5594 5595/* 5596 * Find any device that's done replacing, or a vdev marked 'unspare' that's 5597 * currently spared, so we can detach it. 5598 */ 5599static vdev_t * 5600spa_vdev_resilver_done_hunt(vdev_t *vd) 5601{ 5602 vdev_t *newvd, *oldvd; 5603 5604 for (int c = 0; c < vd->vdev_children; c++) { 5605 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 5606 if (oldvd != NULL) 5607 return (oldvd); 5608 } 5609 5610 /* 5611 * Check for a completed replacement. We always consider the first 5612 * vdev in the list to be the oldest vdev, and the last one to be 5613 * the newest (see spa_vdev_attach() for how that works). In 5614 * the case where the newest vdev is faulted, we will not automatically 5615 * remove it after a resilver completes. This is OK as it will require 5616 * user intervention to determine which disk the admin wishes to keep. 5617 */ 5618 if (vd->vdev_ops == &vdev_replacing_ops) { 5619 ASSERT(vd->vdev_children > 1); 5620 5621 newvd = vd->vdev_child[vd->vdev_children - 1]; 5622 oldvd = vd->vdev_child[0]; 5623 5624 if (vdev_dtl_empty(newvd, DTL_MISSING) && 5625 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5626 !vdev_dtl_required(oldvd)) 5627 return (oldvd); 5628 } 5629 5630 /* 5631 * Check for a completed resilver with the 'unspare' flag set. 5632 */ 5633 if (vd->vdev_ops == &vdev_spare_ops) { 5634 vdev_t *first = vd->vdev_child[0]; 5635 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 5636 5637 if (last->vdev_unspare) { 5638 oldvd = first; 5639 newvd = last; 5640 } else if (first->vdev_unspare) { 5641 oldvd = last; 5642 newvd = first; 5643 } else { 5644 oldvd = NULL; 5645 } 5646 5647 if (oldvd != NULL && 5648 vdev_dtl_empty(newvd, DTL_MISSING) && 5649 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5650 !vdev_dtl_required(oldvd)) 5651 return (oldvd); 5652 5653 /* 5654 * If there are more than two spares attached to a disk, 5655 * and those spares are not required, then we want to 5656 * attempt to free them up now so that they can be used 5657 * by other pools. Once we're back down to a single 5658 * disk+spare, we stop removing them. 5659 */ 5660 if (vd->vdev_children > 2) { 5661 newvd = vd->vdev_child[1]; 5662 5663 if (newvd->vdev_isspare && last->vdev_isspare && 5664 vdev_dtl_empty(last, DTL_MISSING) && 5665 vdev_dtl_empty(last, DTL_OUTAGE) && 5666 !vdev_dtl_required(newvd)) 5667 return (newvd); 5668 } 5669 } 5670 5671 return (NULL); 5672} 5673 5674static void 5675spa_vdev_resilver_done(spa_t *spa) 5676{ 5677 vdev_t *vd, *pvd, *ppvd; 5678 uint64_t guid, sguid, pguid, ppguid; 5679 5680 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5681 5682 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 5683 pvd = vd->vdev_parent; 5684 ppvd = pvd->vdev_parent; 5685 guid = vd->vdev_guid; 5686 pguid = pvd->vdev_guid; 5687 ppguid = ppvd->vdev_guid; 5688 sguid = 0; 5689 /* 5690 * If we have just finished replacing a hot spared device, then 5691 * we need to detach the parent's first child (the original hot 5692 * spare) as well. 5693 */ 5694 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 5695 ppvd->vdev_children == 2) { 5696 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 5697 sguid = ppvd->vdev_child[1]->vdev_guid; 5698 } 5699 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); 5700 5701 spa_config_exit(spa, SCL_ALL, FTAG); 5702 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 5703 return; 5704 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 5705 return; 5706 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5707 } 5708 5709 spa_config_exit(spa, SCL_ALL, FTAG); 5710} 5711 5712/* 5713 * Update the stored path or FRU for this vdev. 5714 */ 5715int 5716spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 5717 boolean_t ispath) 5718{ 5719 vdev_t *vd; 5720 boolean_t sync = B_FALSE; 5721 5722 ASSERT(spa_writeable(spa)); 5723 5724 spa_vdev_state_enter(spa, SCL_ALL); 5725 5726 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 5727 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 5728 5729 if (!vd->vdev_ops->vdev_op_leaf) 5730 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 5731 5732 if (ispath) { 5733 if (strcmp(value, vd->vdev_path) != 0) { 5734 spa_strfree(vd->vdev_path); 5735 vd->vdev_path = spa_strdup(value); 5736 sync = B_TRUE; 5737 } 5738 } else { 5739 if (vd->vdev_fru == NULL) { 5740 vd->vdev_fru = spa_strdup(value); 5741 sync = B_TRUE; 5742 } else if (strcmp(value, vd->vdev_fru) != 0) { 5743 spa_strfree(vd->vdev_fru); 5744 vd->vdev_fru = spa_strdup(value); 5745 sync = B_TRUE; 5746 } 5747 } 5748 5749 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 5750} 5751 5752int 5753spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 5754{ 5755 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 5756} 5757 5758int 5759spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 5760{ 5761 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 5762} 5763 5764/* 5765 * ========================================================================== 5766 * SPA Scanning 5767 * ========================================================================== 5768 */ 5769 5770int 5771spa_scan_stop(spa_t *spa) 5772{ 5773 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5774 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 5775 return (SET_ERROR(EBUSY)); 5776 return (dsl_scan_cancel(spa->spa_dsl_pool)); 5777} 5778 5779int 5780spa_scan(spa_t *spa, pool_scan_func_t func) 5781{ 5782 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5783 5784 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 5785 return (SET_ERROR(ENOTSUP)); 5786 5787 /* 5788 * If a resilver was requested, but there is no DTL on a 5789 * writeable leaf device, we have nothing to do. 5790 */ 5791 if (func == POOL_SCAN_RESILVER && 5792 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 5793 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 5794 return (0); 5795 } 5796 5797 return (dsl_scan(spa->spa_dsl_pool, func)); 5798} 5799 5800/* 5801 * ========================================================================== 5802 * SPA async task processing 5803 * ========================================================================== 5804 */ 5805 5806static void 5807spa_async_remove(spa_t *spa, vdev_t *vd) 5808{ 5809 if (vd->vdev_remove_wanted) { 5810 vd->vdev_remove_wanted = B_FALSE; 5811 vd->vdev_delayed_close = B_FALSE; 5812 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 5813 5814 /* 5815 * We want to clear the stats, but we don't want to do a full 5816 * vdev_clear() as that will cause us to throw away 5817 * degraded/faulted state as well as attempt to reopen the 5818 * device, all of which is a waste. 5819 */ 5820 vd->vdev_stat.vs_read_errors = 0; 5821 vd->vdev_stat.vs_write_errors = 0; 5822 vd->vdev_stat.vs_checksum_errors = 0; 5823 5824 vdev_state_dirty(vd->vdev_top); 5825 } 5826 5827 for (int c = 0; c < vd->vdev_children; c++) 5828 spa_async_remove(spa, vd->vdev_child[c]); 5829} 5830 5831static void 5832spa_async_probe(spa_t *spa, vdev_t *vd) 5833{ 5834 if (vd->vdev_probe_wanted) { 5835 vd->vdev_probe_wanted = B_FALSE; 5836 vdev_reopen(vd); /* vdev_open() does the actual probe */ 5837 } 5838 5839 for (int c = 0; c < vd->vdev_children; c++) 5840 spa_async_probe(spa, vd->vdev_child[c]); 5841} 5842 5843static void 5844spa_async_autoexpand(spa_t *spa, vdev_t *vd) 5845{ 5846 sysevent_id_t eid; 5847 nvlist_t *attr; 5848 char *physpath; 5849 5850 if (!spa->spa_autoexpand) 5851 return; 5852 5853 for (int c = 0; c < vd->vdev_children; c++) { 5854 vdev_t *cvd = vd->vdev_child[c]; 5855 spa_async_autoexpand(spa, cvd); 5856 } 5857 5858 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 5859 return; 5860 5861 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 5862 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 5863 5864 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5865 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); 5866 5867 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, 5868 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP); 5869 5870 nvlist_free(attr); 5871 kmem_free(physpath, MAXPATHLEN); 5872} 5873 5874static void 5875spa_async_thread(void *arg) 5876{ 5877 spa_t *spa = arg; 5878 int tasks; 5879 5880 ASSERT(spa->spa_sync_on); 5881 5882 mutex_enter(&spa->spa_async_lock); 5883 tasks = spa->spa_async_tasks; 5884 spa->spa_async_tasks &= SPA_ASYNC_REMOVE; 5885 mutex_exit(&spa->spa_async_lock); 5886 5887 /* 5888 * See if the config needs to be updated. 5889 */ 5890 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 5891 uint64_t old_space, new_space; 5892 5893 mutex_enter(&spa_namespace_lock); 5894 old_space = metaslab_class_get_space(spa_normal_class(spa)); 5895 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5896 new_space = metaslab_class_get_space(spa_normal_class(spa)); 5897 mutex_exit(&spa_namespace_lock); 5898 5899 /* 5900 * If the pool grew as a result of the config update, 5901 * then log an internal history event. 5902 */ 5903 if (new_space != old_space) { 5904 spa_history_log_internal(spa, "vdev online", NULL, 5905 "pool '%s' size: %llu(+%llu)", 5906 spa_name(spa), new_space, new_space - old_space); 5907 } 5908 } 5909 5910 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 5911 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5912 spa_async_autoexpand(spa, spa->spa_root_vdev); 5913 spa_config_exit(spa, SCL_CONFIG, FTAG); 5914 } 5915 5916 /* 5917 * See if any devices need to be probed. 5918 */ 5919 if (tasks & SPA_ASYNC_PROBE) { 5920 spa_vdev_state_enter(spa, SCL_NONE); 5921 spa_async_probe(spa, spa->spa_root_vdev); 5922 (void) spa_vdev_state_exit(spa, NULL, 0); 5923 } 5924 5925 /* 5926 * If any devices are done replacing, detach them. 5927 */ 5928 if (tasks & SPA_ASYNC_RESILVER_DONE) 5929 spa_vdev_resilver_done(spa); 5930 5931 /* 5932 * Kick off a resilver. 5933 */ 5934 if (tasks & SPA_ASYNC_RESILVER) 5935 dsl_resilver_restart(spa->spa_dsl_pool, 0); 5936 5937 /* 5938 * Let the world know that we're done. 5939 */ 5940 mutex_enter(&spa->spa_async_lock); 5941 spa->spa_async_thread = NULL; 5942 cv_broadcast(&spa->spa_async_cv); 5943 mutex_exit(&spa->spa_async_lock); 5944 thread_exit(); 5945} 5946 5947static void 5948spa_async_thread_vd(void *arg) 5949{ 5950 spa_t *spa = arg; 5951 int tasks; 5952 5953 ASSERT(spa->spa_sync_on); 5954 5955 mutex_enter(&spa->spa_async_lock); 5956 tasks = spa->spa_async_tasks; 5957retry: 5958 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE; 5959 mutex_exit(&spa->spa_async_lock); 5960 5961 /* 5962 * See if any devices need to be marked REMOVED. 5963 */ 5964 if (tasks & SPA_ASYNC_REMOVE) { 5965 spa_vdev_state_enter(spa, SCL_NONE); 5966 spa_async_remove(spa, spa->spa_root_vdev); 5967 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 5968 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 5969 for (int i = 0; i < spa->spa_spares.sav_count; i++) 5970 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 5971 (void) spa_vdev_state_exit(spa, NULL, 0); 5972 } 5973 5974 /* 5975 * Let the world know that we're done. 5976 */ 5977 mutex_enter(&spa->spa_async_lock); 5978 tasks = spa->spa_async_tasks; 5979 if ((tasks & SPA_ASYNC_REMOVE) != 0) 5980 goto retry; 5981 spa->spa_async_thread_vd = NULL; 5982 cv_broadcast(&spa->spa_async_cv); 5983 mutex_exit(&spa->spa_async_lock); 5984 thread_exit(); 5985} 5986 5987void 5988spa_async_suspend(spa_t *spa) 5989{ 5990 mutex_enter(&spa->spa_async_lock); 5991 spa->spa_async_suspended++; 5992 while (spa->spa_async_thread != NULL && 5993 spa->spa_async_thread_vd != NULL) 5994 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 5995 mutex_exit(&spa->spa_async_lock); 5996} 5997 5998void 5999spa_async_resume(spa_t *spa) 6000{ 6001 mutex_enter(&spa->spa_async_lock); 6002 ASSERT(spa->spa_async_suspended != 0); 6003 spa->spa_async_suspended--; 6004 mutex_exit(&spa->spa_async_lock); 6005} 6006 6007static boolean_t 6008spa_async_tasks_pending(spa_t *spa) 6009{ 6010 uint_t non_config_tasks; 6011 uint_t config_task; 6012 boolean_t config_task_suspended; 6013 6014 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE | 6015 SPA_ASYNC_REMOVE); 6016 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; 6017 if (spa->spa_ccw_fail_time == 0) { 6018 config_task_suspended = B_FALSE; 6019 } else { 6020 config_task_suspended = 6021 (gethrtime() - spa->spa_ccw_fail_time) < 6022 (zfs_ccw_retry_interval * NANOSEC); 6023 } 6024 6025 return (non_config_tasks || (config_task && !config_task_suspended)); 6026} 6027 6028static void 6029spa_async_dispatch(spa_t *spa) 6030{ 6031 mutex_enter(&spa->spa_async_lock); 6032 if (spa_async_tasks_pending(spa) && 6033 !spa->spa_async_suspended && 6034 spa->spa_async_thread == NULL && 6035 rootdir != NULL) 6036 spa->spa_async_thread = thread_create(NULL, 0, 6037 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 6038 mutex_exit(&spa->spa_async_lock); 6039} 6040 6041static void 6042spa_async_dispatch_vd(spa_t *spa) 6043{ 6044 mutex_enter(&spa->spa_async_lock); 6045 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 && 6046 !spa->spa_async_suspended && 6047 spa->spa_async_thread_vd == NULL && 6048 rootdir != NULL) 6049 spa->spa_async_thread_vd = thread_create(NULL, 0, 6050 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri); 6051 mutex_exit(&spa->spa_async_lock); 6052} 6053 6054void 6055spa_async_request(spa_t *spa, int task) 6056{ 6057 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 6058 mutex_enter(&spa->spa_async_lock); 6059 spa->spa_async_tasks |= task; 6060 mutex_exit(&spa->spa_async_lock); 6061 spa_async_dispatch_vd(spa); 6062} 6063 6064/* 6065 * ========================================================================== 6066 * SPA syncing routines 6067 * ========================================================================== 6068 */ 6069 6070static int 6071bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6072{ 6073 bpobj_t *bpo = arg; 6074 bpobj_enqueue(bpo, bp, tx); 6075 return (0); 6076} 6077 6078static int 6079spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6080{ 6081 zio_t *zio = arg; 6082 6083 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 6084 BP_GET_PSIZE(bp), zio->io_flags)); 6085 return (0); 6086} 6087 6088/* 6089 * Note: this simple function is not inlined to make it easier to dtrace the 6090 * amount of time spent syncing frees. 6091 */ 6092static void 6093spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) 6094{ 6095 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6096 bplist_iterate(bpl, spa_free_sync_cb, zio, tx); 6097 VERIFY(zio_wait(zio) == 0); 6098} 6099 6100/* 6101 * Note: this simple function is not inlined to make it easier to dtrace the 6102 * amount of time spent syncing deferred frees. 6103 */ 6104static void 6105spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) 6106{ 6107 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6108 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, 6109 spa_free_sync_cb, zio, tx), ==, 0); 6110 VERIFY0(zio_wait(zio)); 6111} 6112 6113 6114static void 6115spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 6116{ 6117 char *packed = NULL; 6118 size_t bufsize; 6119 size_t nvsize = 0; 6120 dmu_buf_t *db; 6121 6122 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 6123 6124 /* 6125 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 6126 * information. This avoids the dmu_buf_will_dirty() path and 6127 * saves us a pre-read to get data we don't actually care about. 6128 */ 6129 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 6130 packed = kmem_alloc(bufsize, KM_SLEEP); 6131 6132 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 6133 KM_SLEEP) == 0); 6134 bzero(packed + nvsize, bufsize - nvsize); 6135 6136 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 6137 6138 kmem_free(packed, bufsize); 6139 6140 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 6141 dmu_buf_will_dirty(db, tx); 6142 *(uint64_t *)db->db_data = nvsize; 6143 dmu_buf_rele(db, FTAG); 6144} 6145 6146static void 6147spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 6148 const char *config, const char *entry) 6149{ 6150 nvlist_t *nvroot; 6151 nvlist_t **list; 6152 int i; 6153 6154 if (!sav->sav_sync) 6155 return; 6156 6157 /* 6158 * Update the MOS nvlist describing the list of available devices. 6159 * spa_validate_aux() will have already made sure this nvlist is 6160 * valid and the vdevs are labeled appropriately. 6161 */ 6162 if (sav->sav_object == 0) { 6163 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 6164 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 6165 sizeof (uint64_t), tx); 6166 VERIFY(zap_update(spa->spa_meta_objset, 6167 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 6168 &sav->sav_object, tx) == 0); 6169 } 6170 6171 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 6172 if (sav->sav_count == 0) { 6173 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 6174 } else { 6175 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 6176 for (i = 0; i < sav->sav_count; i++) 6177 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 6178 B_FALSE, VDEV_CONFIG_L2CACHE); 6179 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 6180 sav->sav_count) == 0); 6181 for (i = 0; i < sav->sav_count; i++) 6182 nvlist_free(list[i]); 6183 kmem_free(list, sav->sav_count * sizeof (void *)); 6184 } 6185 6186 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 6187 nvlist_free(nvroot); 6188 6189 sav->sav_sync = B_FALSE; 6190} 6191 6192static void 6193spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 6194{ 6195 nvlist_t *config; 6196 6197 if (list_is_empty(&spa->spa_config_dirty_list)) 6198 return; 6199 6200 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6201 6202 config = spa_config_generate(spa, spa->spa_root_vdev, 6203 dmu_tx_get_txg(tx), B_FALSE); 6204 6205 /* 6206 * If we're upgrading the spa version then make sure that 6207 * the config object gets updated with the correct version. 6208 */ 6209 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) 6210 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 6211 spa->spa_uberblock.ub_version); 6212 6213 spa_config_exit(spa, SCL_STATE, FTAG); 6214 6215 if (spa->spa_config_syncing) 6216 nvlist_free(spa->spa_config_syncing); 6217 spa->spa_config_syncing = config; 6218 6219 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 6220} 6221 6222static void 6223spa_sync_version(void *arg, dmu_tx_t *tx) 6224{ 6225 uint64_t *versionp = arg; 6226 uint64_t version = *versionp; 6227 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6228 6229 /* 6230 * Setting the version is special cased when first creating the pool. 6231 */ 6232 ASSERT(tx->tx_txg != TXG_INITIAL); 6233 6234 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 6235 ASSERT(version >= spa_version(spa)); 6236 6237 spa->spa_uberblock.ub_version = version; 6238 vdev_config_dirty(spa->spa_root_vdev); 6239 spa_history_log_internal(spa, "set", tx, "version=%lld", version); 6240} 6241 6242/* 6243 * Set zpool properties. 6244 */ 6245static void 6246spa_sync_props(void *arg, dmu_tx_t *tx) 6247{ 6248 nvlist_t *nvp = arg; 6249 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6250 objset_t *mos = spa->spa_meta_objset; 6251 nvpair_t *elem = NULL; 6252 6253 mutex_enter(&spa->spa_props_lock); 6254 6255 while ((elem = nvlist_next_nvpair(nvp, elem))) { 6256 uint64_t intval; 6257 char *strval, *fname; 6258 zpool_prop_t prop; 6259 const char *propname; 6260 zprop_type_t proptype; 6261 spa_feature_t fid; 6262 6263 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 6264 case ZPROP_INVAL: 6265 /* 6266 * We checked this earlier in spa_prop_validate(). 6267 */ 6268 ASSERT(zpool_prop_feature(nvpair_name(elem))); 6269 6270 fname = strchr(nvpair_name(elem), '@') + 1; 6271 VERIFY0(zfeature_lookup_name(fname, &fid)); 6272 6273 spa_feature_enable(spa, fid, tx); 6274 spa_history_log_internal(spa, "set", tx, 6275 "%s=enabled", nvpair_name(elem)); 6276 break; 6277 6278 case ZPOOL_PROP_VERSION: 6279 intval = fnvpair_value_uint64(elem); 6280 /* 6281 * The version is synced seperatly before other 6282 * properties and should be correct by now. 6283 */ 6284 ASSERT3U(spa_version(spa), >=, intval); 6285 break; 6286 6287 case ZPOOL_PROP_ALTROOT: 6288 /* 6289 * 'altroot' is a non-persistent property. It should 6290 * have been set temporarily at creation or import time. 6291 */ 6292 ASSERT(spa->spa_root != NULL); 6293 break; 6294 6295 case ZPOOL_PROP_READONLY: 6296 case ZPOOL_PROP_CACHEFILE: 6297 /* 6298 * 'readonly' and 'cachefile' are also non-persisitent 6299 * properties. 6300 */ 6301 break; 6302 case ZPOOL_PROP_COMMENT: 6303 strval = fnvpair_value_string(elem); 6304 if (spa->spa_comment != NULL) 6305 spa_strfree(spa->spa_comment); 6306 spa->spa_comment = spa_strdup(strval); 6307 /* 6308 * We need to dirty the configuration on all the vdevs 6309 * so that their labels get updated. It's unnecessary 6310 * to do this for pool creation since the vdev's 6311 * configuratoin has already been dirtied. 6312 */ 6313 if (tx->tx_txg != TXG_INITIAL) 6314 vdev_config_dirty(spa->spa_root_vdev); 6315 spa_history_log_internal(spa, "set", tx, 6316 "%s=%s", nvpair_name(elem), strval); 6317 break; 6318 default: 6319 /* 6320 * Set pool property values in the poolprops mos object. 6321 */ 6322 if (spa->spa_pool_props_object == 0) { 6323 spa->spa_pool_props_object = 6324 zap_create_link(mos, DMU_OT_POOL_PROPS, 6325 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 6326 tx); 6327 } 6328 6329 /* normalize the property name */ 6330 propname = zpool_prop_to_name(prop); 6331 proptype = zpool_prop_get_type(prop); 6332 6333 if (nvpair_type(elem) == DATA_TYPE_STRING) { 6334 ASSERT(proptype == PROP_TYPE_STRING); 6335 strval = fnvpair_value_string(elem); 6336 VERIFY0(zap_update(mos, 6337 spa->spa_pool_props_object, propname, 6338 1, strlen(strval) + 1, strval, tx)); 6339 spa_history_log_internal(spa, "set", tx, 6340 "%s=%s", nvpair_name(elem), strval); 6341 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 6342 intval = fnvpair_value_uint64(elem); 6343 6344 if (proptype == PROP_TYPE_INDEX) { 6345 const char *unused; 6346 VERIFY0(zpool_prop_index_to_string( 6347 prop, intval, &unused)); 6348 } 6349 VERIFY0(zap_update(mos, 6350 spa->spa_pool_props_object, propname, 6351 8, 1, &intval, tx)); 6352 spa_history_log_internal(spa, "set", tx, 6353 "%s=%lld", nvpair_name(elem), intval); 6354 } else { 6355 ASSERT(0); /* not allowed */ 6356 } 6357 6358 switch (prop) { 6359 case ZPOOL_PROP_DELEGATION: 6360 spa->spa_delegation = intval; 6361 break; 6362 case ZPOOL_PROP_BOOTFS: 6363 spa->spa_bootfs = intval; 6364 break; 6365 case ZPOOL_PROP_FAILUREMODE: 6366 spa->spa_failmode = intval; 6367 break; 6368 case ZPOOL_PROP_AUTOEXPAND: 6369 spa->spa_autoexpand = intval; 6370 if (tx->tx_txg != TXG_INITIAL) 6371 spa_async_request(spa, 6372 SPA_ASYNC_AUTOEXPAND); 6373 break; 6374 case ZPOOL_PROP_DEDUPDITTO: 6375 spa->spa_dedup_ditto = intval; 6376 break; 6377 default: 6378 break; 6379 } 6380 } 6381 6382 } 6383 6384 mutex_exit(&spa->spa_props_lock); 6385} 6386 6387/* 6388 * Perform one-time upgrade on-disk changes. spa_version() does not 6389 * reflect the new version this txg, so there must be no changes this 6390 * txg to anything that the upgrade code depends on after it executes. 6391 * Therefore this must be called after dsl_pool_sync() does the sync 6392 * tasks. 6393 */ 6394static void 6395spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 6396{ 6397 dsl_pool_t *dp = spa->spa_dsl_pool; 6398 6399 ASSERT(spa->spa_sync_pass == 1); 6400 6401 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); 6402 6403 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 6404 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 6405 dsl_pool_create_origin(dp, tx); 6406 6407 /* Keeping the origin open increases spa_minref */ 6408 spa->spa_minref += 3; 6409 } 6410 6411 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 6412 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 6413 dsl_pool_upgrade_clones(dp, tx); 6414 } 6415 6416 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 6417 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 6418 dsl_pool_upgrade_dir_clones(dp, tx); 6419 6420 /* Keeping the freedir open increases spa_minref */ 6421 spa->spa_minref += 3; 6422 } 6423 6424 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 6425 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6426 spa_feature_create_zap_objects(spa, tx); 6427 } 6428 6429 /* 6430 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable 6431 * when possibility to use lz4 compression for metadata was added 6432 * Old pools that have this feature enabled must be upgraded to have 6433 * this feature active 6434 */ 6435 if (spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6436 boolean_t lz4_en = spa_feature_is_enabled(spa, 6437 SPA_FEATURE_LZ4_COMPRESS); 6438 boolean_t lz4_ac = spa_feature_is_active(spa, 6439 SPA_FEATURE_LZ4_COMPRESS); 6440 6441 if (lz4_en && !lz4_ac) 6442 spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx); 6443 } 6444 rrw_exit(&dp->dp_config_rwlock, FTAG); 6445} 6446 6447/* 6448 * Sync the specified transaction group. New blocks may be dirtied as 6449 * part of the process, so we iterate until it converges. 6450 */ 6451void 6452spa_sync(spa_t *spa, uint64_t txg) 6453{ 6454 dsl_pool_t *dp = spa->spa_dsl_pool; 6455 objset_t *mos = spa->spa_meta_objset; 6456 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 6457 vdev_t *rvd = spa->spa_root_vdev; 6458 vdev_t *vd; 6459 dmu_tx_t *tx; 6460 int error; 6461 6462 VERIFY(spa_writeable(spa)); 6463 6464 /* 6465 * Lock out configuration changes. 6466 */ 6467 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 6468 6469 spa->spa_syncing_txg = txg; 6470 spa->spa_sync_pass = 0; 6471 6472 /* 6473 * If there are any pending vdev state changes, convert them 6474 * into config changes that go out with this transaction group. 6475 */ 6476 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6477 while (list_head(&spa->spa_state_dirty_list) != NULL) { 6478 /* 6479 * We need the write lock here because, for aux vdevs, 6480 * calling vdev_config_dirty() modifies sav_config. 6481 * This is ugly and will become unnecessary when we 6482 * eliminate the aux vdev wart by integrating all vdevs 6483 * into the root vdev tree. 6484 */ 6485 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6486 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 6487 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 6488 vdev_state_clean(vd); 6489 vdev_config_dirty(vd); 6490 } 6491 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6492 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6493 } 6494 spa_config_exit(spa, SCL_STATE, FTAG); 6495 6496 tx = dmu_tx_create_assigned(dp, txg); 6497 6498 spa->spa_sync_starttime = gethrtime(); 6499#ifdef illumos 6500 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, 6501 spa->spa_sync_starttime + spa->spa_deadman_synctime)); 6502#else /* FreeBSD */ 6503#ifdef _KERNEL 6504 callout_reset(&spa->spa_deadman_cycid, 6505 hz * spa->spa_deadman_synctime / NANOSEC, spa_deadman, spa); 6506#endif 6507#endif 6508 6509 /* 6510 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 6511 * set spa_deflate if we have no raid-z vdevs. 6512 */ 6513 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 6514 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 6515 int i; 6516 6517 for (i = 0; i < rvd->vdev_children; i++) { 6518 vd = rvd->vdev_child[i]; 6519 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 6520 break; 6521 } 6522 if (i == rvd->vdev_children) { 6523 spa->spa_deflate = TRUE; 6524 VERIFY(0 == zap_add(spa->spa_meta_objset, 6525 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 6526 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 6527 } 6528 } 6529 6530 /* 6531 * If anything has changed in this txg, or if someone is waiting 6532 * for this txg to sync (eg, spa_vdev_remove()), push the 6533 * deferred frees from the previous txg. If not, leave them 6534 * alone so that we don't generate work on an otherwise idle 6535 * system. 6536 */ 6537 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || 6538 !txg_list_empty(&dp->dp_dirty_dirs, txg) || 6539 !txg_list_empty(&dp->dp_sync_tasks, txg) || 6540 ((dsl_scan_active(dp->dp_scan) || 6541 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) { 6542 spa_sync_deferred_frees(spa, tx); 6543 } 6544 6545 /* 6546 * Iterate to convergence. 6547 */ 6548 do { 6549 int pass = ++spa->spa_sync_pass; 6550 6551 spa_sync_config_object(spa, tx); 6552 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 6553 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 6554 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 6555 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 6556 spa_errlog_sync(spa, txg); 6557 dsl_pool_sync(dp, txg); 6558 6559 if (pass < zfs_sync_pass_deferred_free) { 6560 spa_sync_frees(spa, free_bpl, tx); 6561 } else { 6562 bplist_iterate(free_bpl, bpobj_enqueue_cb, 6563 &spa->spa_deferred_bpobj, tx); 6564 } 6565 6566 ddt_sync(spa, txg); 6567 dsl_scan_sync(dp, tx); 6568 6569 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 6570 vdev_sync(vd, txg); 6571 6572 if (pass == 1) 6573 spa_sync_upgrades(spa, tx); 6574 6575 } while (dmu_objset_is_dirty(mos, txg)); 6576 6577 /* 6578 * Rewrite the vdev configuration (which includes the uberblock) 6579 * to commit the transaction group. 6580 * 6581 * If there are no dirty vdevs, we sync the uberblock to a few 6582 * random top-level vdevs that are known to be visible in the 6583 * config cache (see spa_vdev_add() for a complete description). 6584 * If there *are* dirty vdevs, sync the uberblock to all vdevs. 6585 */ 6586 for (;;) { 6587 /* 6588 * We hold SCL_STATE to prevent vdev open/close/etc. 6589 * while we're attempting to write the vdev labels. 6590 */ 6591 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6592 6593 if (list_is_empty(&spa->spa_config_dirty_list)) { 6594 vdev_t *svd[SPA_DVAS_PER_BP]; 6595 int svdcount = 0; 6596 int children = rvd->vdev_children; 6597 int c0 = spa_get_random(children); 6598 6599 for (int c = 0; c < children; c++) { 6600 vd = rvd->vdev_child[(c0 + c) % children]; 6601 if (vd->vdev_ms_array == 0 || vd->vdev_islog) 6602 continue; 6603 svd[svdcount++] = vd; 6604 if (svdcount == SPA_DVAS_PER_BP) 6605 break; 6606 } 6607 error = vdev_config_sync(svd, svdcount, txg, B_FALSE); 6608 if (error != 0) 6609 error = vdev_config_sync(svd, svdcount, txg, 6610 B_TRUE); 6611 } else { 6612 error = vdev_config_sync(rvd->vdev_child, 6613 rvd->vdev_children, txg, B_FALSE); 6614 if (error != 0) 6615 error = vdev_config_sync(rvd->vdev_child, 6616 rvd->vdev_children, txg, B_TRUE); 6617 } 6618 6619 if (error == 0) 6620 spa->spa_last_synced_guid = rvd->vdev_guid; 6621 6622 spa_config_exit(spa, SCL_STATE, FTAG); 6623 6624 if (error == 0) 6625 break; 6626 zio_suspend(spa, NULL); 6627 zio_resume_wait(spa); 6628 } 6629 dmu_tx_commit(tx); 6630 6631#ifdef illumos 6632 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 6633#else /* FreeBSD */ 6634#ifdef _KERNEL 6635 callout_drain(&spa->spa_deadman_cycid); 6636#endif 6637#endif 6638 6639 /* 6640 * Clear the dirty config list. 6641 */ 6642 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 6643 vdev_config_clean(vd); 6644 6645 /* 6646 * Now that the new config has synced transactionally, 6647 * let it become visible to the config cache. 6648 */ 6649 if (spa->spa_config_syncing != NULL) { 6650 spa_config_set(spa, spa->spa_config_syncing); 6651 spa->spa_config_txg = txg; 6652 spa->spa_config_syncing = NULL; 6653 } 6654 6655 spa->spa_ubsync = spa->spa_uberblock; 6656 6657 dsl_pool_sync_done(dp, txg); 6658 6659 /* 6660 * Update usable space statistics. 6661 */ 6662 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 6663 vdev_sync_done(vd, txg); 6664 6665 spa_update_dspace(spa); 6666 6667 /* 6668 * It had better be the case that we didn't dirty anything 6669 * since vdev_config_sync(). 6670 */ 6671 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 6672 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 6673 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 6674 6675 spa->spa_sync_pass = 0; 6676 6677 spa_config_exit(spa, SCL_CONFIG, FTAG); 6678 6679 spa_handle_ignored_writes(spa); 6680 6681 /* 6682 * If any async tasks have been requested, kick them off. 6683 */ 6684 spa_async_dispatch(spa); 6685 spa_async_dispatch_vd(spa); 6686} 6687 6688/* 6689 * Sync all pools. We don't want to hold the namespace lock across these 6690 * operations, so we take a reference on the spa_t and drop the lock during the 6691 * sync. 6692 */ 6693void 6694spa_sync_allpools(void) 6695{ 6696 spa_t *spa = NULL; 6697 mutex_enter(&spa_namespace_lock); 6698 while ((spa = spa_next(spa)) != NULL) { 6699 if (spa_state(spa) != POOL_STATE_ACTIVE || 6700 !spa_writeable(spa) || spa_suspended(spa)) 6701 continue; 6702 spa_open_ref(spa, FTAG); 6703 mutex_exit(&spa_namespace_lock); 6704 txg_wait_synced(spa_get_dsl(spa), 0); 6705 mutex_enter(&spa_namespace_lock); 6706 spa_close(spa, FTAG); 6707 } 6708 mutex_exit(&spa_namespace_lock); 6709} 6710 6711/* 6712 * ========================================================================== 6713 * Miscellaneous routines 6714 * ========================================================================== 6715 */ 6716 6717/* 6718 * Remove all pools in the system. 6719 */ 6720void 6721spa_evict_all(void) 6722{ 6723 spa_t *spa; 6724 6725 /* 6726 * Remove all cached state. All pools should be closed now, 6727 * so every spa in the AVL tree should be unreferenced. 6728 */ 6729 mutex_enter(&spa_namespace_lock); 6730 while ((spa = spa_next(NULL)) != NULL) { 6731 /* 6732 * Stop async tasks. The async thread may need to detach 6733 * a device that's been replaced, which requires grabbing 6734 * spa_namespace_lock, so we must drop it here. 6735 */ 6736 spa_open_ref(spa, FTAG); 6737 mutex_exit(&spa_namespace_lock); 6738 spa_async_suspend(spa); 6739 mutex_enter(&spa_namespace_lock); 6740 spa_close(spa, FTAG); 6741 6742 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 6743 spa_unload(spa); 6744 spa_deactivate(spa); 6745 } 6746 spa_remove(spa); 6747 } 6748 mutex_exit(&spa_namespace_lock); 6749} 6750 6751vdev_t * 6752spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 6753{ 6754 vdev_t *vd; 6755 int i; 6756 6757 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 6758 return (vd); 6759 6760 if (aux) { 6761 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 6762 vd = spa->spa_l2cache.sav_vdevs[i]; 6763 if (vd->vdev_guid == guid) 6764 return (vd); 6765 } 6766 6767 for (i = 0; i < spa->spa_spares.sav_count; i++) { 6768 vd = spa->spa_spares.sav_vdevs[i]; 6769 if (vd->vdev_guid == guid) 6770 return (vd); 6771 } 6772 } 6773 6774 return (NULL); 6775} 6776 6777void 6778spa_upgrade(spa_t *spa, uint64_t version) 6779{ 6780 ASSERT(spa_writeable(spa)); 6781 6782 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 6783 6784 /* 6785 * This should only be called for a non-faulted pool, and since a 6786 * future version would result in an unopenable pool, this shouldn't be 6787 * possible. 6788 */ 6789 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); 6790 ASSERT3U(version, >=, spa->spa_uberblock.ub_version); 6791 6792 spa->spa_uberblock.ub_version = version; 6793 vdev_config_dirty(spa->spa_root_vdev); 6794 6795 spa_config_exit(spa, SCL_ALL, FTAG); 6796 6797 txg_wait_synced(spa_get_dsl(spa), 0); 6798} 6799 6800boolean_t 6801spa_has_spare(spa_t *spa, uint64_t guid) 6802{ 6803 int i; 6804 uint64_t spareguid; 6805 spa_aux_vdev_t *sav = &spa->spa_spares; 6806 6807 for (i = 0; i < sav->sav_count; i++) 6808 if (sav->sav_vdevs[i]->vdev_guid == guid) 6809 return (B_TRUE); 6810 6811 for (i = 0; i < sav->sav_npending; i++) { 6812 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 6813 &spareguid) == 0 && spareguid == guid) 6814 return (B_TRUE); 6815 } 6816 6817 return (B_FALSE); 6818} 6819 6820/* 6821 * Check if a pool has an active shared spare device. 6822 * Note: reference count of an active spare is 2, as a spare and as a replace 6823 */ 6824static boolean_t 6825spa_has_active_shared_spare(spa_t *spa) 6826{ 6827 int i, refcnt; 6828 uint64_t pool; 6829 spa_aux_vdev_t *sav = &spa->spa_spares; 6830 6831 for (i = 0; i < sav->sav_count; i++) { 6832 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 6833 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 6834 refcnt > 2) 6835 return (B_TRUE); 6836 } 6837 6838 return (B_FALSE); 6839} 6840 6841/* 6842 * Post a sysevent corresponding to the given event. The 'name' must be one of 6843 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 6844 * filled in from the spa and (optionally) the vdev. This doesn't do anything 6845 * in the userland libzpool, as we don't want consumers to misinterpret ztest 6846 * or zdb as real changes. 6847 */ 6848void 6849spa_event_notify(spa_t *spa, vdev_t *vd, const char *name) 6850{ 6851#ifdef _KERNEL 6852 sysevent_t *ev; 6853 sysevent_attr_list_t *attr = NULL; 6854 sysevent_value_t value; 6855 sysevent_id_t eid; 6856 6857 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 6858 SE_SLEEP); 6859 6860 value.value_type = SE_DATA_TYPE_STRING; 6861 value.value.sv_string = spa_name(spa); 6862 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 6863 goto done; 6864 6865 value.value_type = SE_DATA_TYPE_UINT64; 6866 value.value.sv_uint64 = spa_guid(spa); 6867 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 6868 goto done; 6869 6870 if (vd) { 6871 value.value_type = SE_DATA_TYPE_UINT64; 6872 value.value.sv_uint64 = vd->vdev_guid; 6873 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 6874 SE_SLEEP) != 0) 6875 goto done; 6876 6877 if (vd->vdev_path) { 6878 value.value_type = SE_DATA_TYPE_STRING; 6879 value.value.sv_string = vd->vdev_path; 6880 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 6881 &value, SE_SLEEP) != 0) 6882 goto done; 6883 } 6884 } 6885 6886 if (sysevent_attach_attributes(ev, attr) != 0) 6887 goto done; 6888 attr = NULL; 6889 6890 (void) log_sysevent(ev, SE_SLEEP, &eid); 6891 6892done: 6893 if (attr) 6894 sysevent_free_attr(attr); 6895 sysevent_free(ev); 6896#endif 6897} 6898