spa.c revision 268657
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) 2013 by Delphix. All rights reserved. 25 * Copyright 2013 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); 87TUNABLE_INT("vfs.zfs.check_hostid", &check_hostid); 88SYSCTL_INT(_vfs_zfs, OID_AUTO, check_hostid, CTLFLAG_RW, &check_hostid, 0, 89 "Check hostid on import?"); 90 91/* 92 * The interval, in seconds, at which failed configuration cache file writes 93 * should be retried. 94 */ 95static int zfs_ccw_retry_interval = 300; 96 97typedef enum zti_modes { 98 ZTI_MODE_FIXED, /* value is # of threads (min 1) */ 99 ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */ 100 ZTI_MODE_NULL, /* don't create a taskq */ 101 ZTI_NMODES 102} zti_modes_t; 103 104#define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) } 105#define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 } 106#define ZTI_NULL { ZTI_MODE_NULL, 0, 0 } 107 108#define ZTI_N(n) ZTI_P(n, 1) 109#define ZTI_ONE ZTI_N(1) 110 111typedef struct zio_taskq_info { 112 zti_modes_t zti_mode; 113 uint_t zti_value; 114 uint_t zti_count; 115} zio_taskq_info_t; 116 117static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { 118 "issue", "issue_high", "intr", "intr_high" 119}; 120 121/* 122 * This table defines the taskq settings for each ZFS I/O type. When 123 * initializing a pool, we use this table to create an appropriately sized 124 * taskq. Some operations are low volume and therefore have a small, static 125 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE 126 * macros. Other operations process a large amount of data; the ZTI_BATCH 127 * macro causes us to create a taskq oriented for throughput. Some operations 128 * are so high frequency and short-lived that the taskq itself can become a a 129 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an 130 * additional degree of parallelism specified by the number of threads per- 131 * taskq and the number of taskqs; when dispatching an event in this case, the 132 * particular taskq is chosen at random. 133 * 134 * The different taskq priorities are to handle the different contexts (issue 135 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that 136 * need to be handled with minimum delay. 137 */ 138const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = { 139 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */ 140 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */ 141 { ZTI_N(8), ZTI_NULL, ZTI_BATCH, ZTI_NULL }, /* READ */ 142 { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */ 143 { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */ 144 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */ 145 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */ 146}; 147 148static void spa_sync_version(void *arg, dmu_tx_t *tx); 149static void spa_sync_props(void *arg, dmu_tx_t *tx); 150static boolean_t spa_has_active_shared_spare(spa_t *spa); 151static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config, 152 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 153 char **ereport); 154static void spa_vdev_resilver_done(spa_t *spa); 155 156uint_t zio_taskq_batch_pct = 75; /* 1 thread per cpu in pset */ 157#ifdef PSRSET_BIND 158id_t zio_taskq_psrset_bind = PS_NONE; 159#endif 160#ifdef SYSDC 161boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ 162#endif 163uint_t zio_taskq_basedc = 80; /* base duty cycle */ 164 165boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ 166extern int zfs_sync_pass_deferred_free; 167 168#ifndef illumos 169extern void spa_deadman(void *arg); 170#endif 171 172/* 173 * This (illegal) pool name is used when temporarily importing a spa_t in order 174 * to get the vdev stats associated with the imported devices. 175 */ 176#define TRYIMPORT_NAME "$import" 177 178/* 179 * ========================================================================== 180 * SPA properties routines 181 * ========================================================================== 182 */ 183 184/* 185 * Add a (source=src, propname=propval) list to an nvlist. 186 */ 187static void 188spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, 189 uint64_t intval, zprop_source_t src) 190{ 191 const char *propname = zpool_prop_to_name(prop); 192 nvlist_t *propval; 193 194 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); 195 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); 196 197 if (strval != NULL) 198 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); 199 else 200 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); 201 202 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); 203 nvlist_free(propval); 204} 205 206/* 207 * Get property values from the spa configuration. 208 */ 209static void 210spa_prop_get_config(spa_t *spa, nvlist_t **nvp) 211{ 212 vdev_t *rvd = spa->spa_root_vdev; 213 dsl_pool_t *pool = spa->spa_dsl_pool; 214 uint64_t size; 215 uint64_t alloc; 216 uint64_t space; 217 uint64_t cap, version; 218 zprop_source_t src = ZPROP_SRC_NONE; 219 spa_config_dirent_t *dp; 220 221 ASSERT(MUTEX_HELD(&spa->spa_props_lock)); 222 223 if (rvd != NULL) { 224 alloc = metaslab_class_get_alloc(spa_normal_class(spa)); 225 size = metaslab_class_get_space(spa_normal_class(spa)); 226 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); 227 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); 228 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); 229 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, 230 size - alloc, src); 231 232 space = 0; 233 for (int c = 0; c < rvd->vdev_children; c++) { 234 vdev_t *tvd = rvd->vdev_child[c]; 235 space += tvd->vdev_max_asize - tvd->vdev_asize; 236 } 237 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, space, 238 src); 239 240 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, 241 (spa_mode(spa) == FREAD), src); 242 243 cap = (size == 0) ? 0 : (alloc * 100 / size); 244 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); 245 246 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, 247 ddt_get_pool_dedup_ratio(spa), src); 248 249 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, 250 rvd->vdev_state, src); 251 252 version = spa_version(spa); 253 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) 254 src = ZPROP_SRC_DEFAULT; 255 else 256 src = ZPROP_SRC_LOCAL; 257 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src); 258 } 259 260 if (pool != NULL) { 261 /* 262 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, 263 * when opening pools before this version freedir will be NULL. 264 */ 265 if (pool->dp_free_dir != NULL) { 266 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, 267 pool->dp_free_dir->dd_phys->dd_used_bytes, src); 268 } else { 269 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, 270 NULL, 0, src); 271 } 272 273 if (pool->dp_leak_dir != NULL) { 274 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL, 275 pool->dp_leak_dir->dd_phys->dd_used_bytes, src); 276 } else { 277 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, 278 NULL, 0, src); 279 } 280 } 281 282 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); 283 284 if (spa->spa_comment != NULL) { 285 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, 286 0, ZPROP_SRC_LOCAL); 287 } 288 289 if (spa->spa_root != NULL) 290 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, 291 0, ZPROP_SRC_LOCAL); 292 293 if ((dp = list_head(&spa->spa_config_list)) != NULL) { 294 if (dp->scd_path == NULL) { 295 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 296 "none", 0, ZPROP_SRC_LOCAL); 297 } else if (strcmp(dp->scd_path, spa_config_path) != 0) { 298 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 299 dp->scd_path, 0, ZPROP_SRC_LOCAL); 300 } 301 } 302} 303 304/* 305 * Get zpool property values. 306 */ 307int 308spa_prop_get(spa_t *spa, nvlist_t **nvp) 309{ 310 objset_t *mos = spa->spa_meta_objset; 311 zap_cursor_t zc; 312 zap_attribute_t za; 313 int err; 314 315 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 316 317 mutex_enter(&spa->spa_props_lock); 318 319 /* 320 * Get properties from the spa config. 321 */ 322 spa_prop_get_config(spa, nvp); 323 324 /* If no pool property object, no more prop to get. */ 325 if (mos == NULL || spa->spa_pool_props_object == 0) { 326 mutex_exit(&spa->spa_props_lock); 327 return (0); 328 } 329 330 /* 331 * Get properties from the MOS pool property object. 332 */ 333 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); 334 (err = zap_cursor_retrieve(&zc, &za)) == 0; 335 zap_cursor_advance(&zc)) { 336 uint64_t intval = 0; 337 char *strval = NULL; 338 zprop_source_t src = ZPROP_SRC_DEFAULT; 339 zpool_prop_t prop; 340 341 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL) 342 continue; 343 344 switch (za.za_integer_length) { 345 case 8: 346 /* integer property */ 347 if (za.za_first_integer != 348 zpool_prop_default_numeric(prop)) 349 src = ZPROP_SRC_LOCAL; 350 351 if (prop == ZPOOL_PROP_BOOTFS) { 352 dsl_pool_t *dp; 353 dsl_dataset_t *ds = NULL; 354 355 dp = spa_get_dsl(spa); 356 dsl_pool_config_enter(dp, FTAG); 357 if (err = dsl_dataset_hold_obj(dp, 358 za.za_first_integer, FTAG, &ds)) { 359 dsl_pool_config_exit(dp, FTAG); 360 break; 361 } 362 363 strval = kmem_alloc( 364 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, 365 KM_SLEEP); 366 dsl_dataset_name(ds, strval); 367 dsl_dataset_rele(ds, FTAG); 368 dsl_pool_config_exit(dp, FTAG); 369 } else { 370 strval = NULL; 371 intval = za.za_first_integer; 372 } 373 374 spa_prop_add_list(*nvp, prop, strval, intval, src); 375 376 if (strval != NULL) 377 kmem_free(strval, 378 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); 379 380 break; 381 382 case 1: 383 /* string property */ 384 strval = kmem_alloc(za.za_num_integers, KM_SLEEP); 385 err = zap_lookup(mos, spa->spa_pool_props_object, 386 za.za_name, 1, za.za_num_integers, strval); 387 if (err) { 388 kmem_free(strval, za.za_num_integers); 389 break; 390 } 391 spa_prop_add_list(*nvp, prop, strval, 0, src); 392 kmem_free(strval, za.za_num_integers); 393 break; 394 395 default: 396 break; 397 } 398 } 399 zap_cursor_fini(&zc); 400 mutex_exit(&spa->spa_props_lock); 401out: 402 if (err && err != ENOENT) { 403 nvlist_free(*nvp); 404 *nvp = NULL; 405 return (err); 406 } 407 408 return (0); 409} 410 411/* 412 * Validate the given pool properties nvlist and modify the list 413 * for the property values to be set. 414 */ 415static int 416spa_prop_validate(spa_t *spa, nvlist_t *props) 417{ 418 nvpair_t *elem; 419 int error = 0, reset_bootfs = 0; 420 uint64_t objnum = 0; 421 boolean_t has_feature = B_FALSE; 422 423 elem = NULL; 424 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 425 uint64_t intval; 426 char *strval, *slash, *check, *fname; 427 const char *propname = nvpair_name(elem); 428 zpool_prop_t prop = zpool_name_to_prop(propname); 429 430 switch (prop) { 431 case ZPROP_INVAL: 432 if (!zpool_prop_feature(propname)) { 433 error = SET_ERROR(EINVAL); 434 break; 435 } 436 437 /* 438 * Sanitize the input. 439 */ 440 if (nvpair_type(elem) != DATA_TYPE_UINT64) { 441 error = SET_ERROR(EINVAL); 442 break; 443 } 444 445 if (nvpair_value_uint64(elem, &intval) != 0) { 446 error = SET_ERROR(EINVAL); 447 break; 448 } 449 450 if (intval != 0) { 451 error = SET_ERROR(EINVAL); 452 break; 453 } 454 455 fname = strchr(propname, '@') + 1; 456 if (zfeature_lookup_name(fname, NULL) != 0) { 457 error = SET_ERROR(EINVAL); 458 break; 459 } 460 461 has_feature = B_TRUE; 462 break; 463 464 case ZPOOL_PROP_VERSION: 465 error = nvpair_value_uint64(elem, &intval); 466 if (!error && 467 (intval < spa_version(spa) || 468 intval > SPA_VERSION_BEFORE_FEATURES || 469 has_feature)) 470 error = SET_ERROR(EINVAL); 471 break; 472 473 case ZPOOL_PROP_DELEGATION: 474 case ZPOOL_PROP_AUTOREPLACE: 475 case ZPOOL_PROP_LISTSNAPS: 476 case ZPOOL_PROP_AUTOEXPAND: 477 error = nvpair_value_uint64(elem, &intval); 478 if (!error && intval > 1) 479 error = SET_ERROR(EINVAL); 480 break; 481 482 case ZPOOL_PROP_BOOTFS: 483 /* 484 * If the pool version is less than SPA_VERSION_BOOTFS, 485 * or the pool is still being created (version == 0), 486 * the bootfs property cannot be set. 487 */ 488 if (spa_version(spa) < SPA_VERSION_BOOTFS) { 489 error = SET_ERROR(ENOTSUP); 490 break; 491 } 492 493 /* 494 * Make sure the vdev config is bootable 495 */ 496 if (!vdev_is_bootable(spa->spa_root_vdev)) { 497 error = SET_ERROR(ENOTSUP); 498 break; 499 } 500 501 reset_bootfs = 1; 502 503 error = nvpair_value_string(elem, &strval); 504 505 if (!error) { 506 objset_t *os; 507 uint64_t compress; 508 509 if (strval == NULL || strval[0] == '\0') { 510 objnum = zpool_prop_default_numeric( 511 ZPOOL_PROP_BOOTFS); 512 break; 513 } 514 515 if (error = dmu_objset_hold(strval, FTAG, &os)) 516 break; 517 518 /* Must be ZPL and not gzip compressed. */ 519 520 if (dmu_objset_type(os) != DMU_OST_ZFS) { 521 error = SET_ERROR(ENOTSUP); 522 } else if ((error = 523 dsl_prop_get_int_ds(dmu_objset_ds(os), 524 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 525 &compress)) == 0 && 526 !BOOTFS_COMPRESS_VALID(compress)) { 527 error = SET_ERROR(ENOTSUP); 528 } else { 529 objnum = dmu_objset_id(os); 530 } 531 dmu_objset_rele(os, FTAG); 532 } 533 break; 534 535 case ZPOOL_PROP_FAILUREMODE: 536 error = nvpair_value_uint64(elem, &intval); 537 if (!error && (intval < ZIO_FAILURE_MODE_WAIT || 538 intval > ZIO_FAILURE_MODE_PANIC)) 539 error = SET_ERROR(EINVAL); 540 541 /* 542 * This is a special case which only occurs when 543 * the pool has completely failed. This allows 544 * the user to change the in-core failmode property 545 * without syncing it out to disk (I/Os might 546 * currently be blocked). We do this by returning 547 * EIO to the caller (spa_prop_set) to trick it 548 * into thinking we encountered a property validation 549 * error. 550 */ 551 if (!error && spa_suspended(spa)) { 552 spa->spa_failmode = intval; 553 error = SET_ERROR(EIO); 554 } 555 break; 556 557 case ZPOOL_PROP_CACHEFILE: 558 if ((error = nvpair_value_string(elem, &strval)) != 0) 559 break; 560 561 if (strval[0] == '\0') 562 break; 563 564 if (strcmp(strval, "none") == 0) 565 break; 566 567 if (strval[0] != '/') { 568 error = SET_ERROR(EINVAL); 569 break; 570 } 571 572 slash = strrchr(strval, '/'); 573 ASSERT(slash != NULL); 574 575 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 576 strcmp(slash, "/..") == 0) 577 error = SET_ERROR(EINVAL); 578 break; 579 580 case ZPOOL_PROP_COMMENT: 581 if ((error = nvpair_value_string(elem, &strval)) != 0) 582 break; 583 for (check = strval; *check != '\0'; check++) { 584 /* 585 * The kernel doesn't have an easy isprint() 586 * check. For this kernel check, we merely 587 * check ASCII apart from DEL. Fix this if 588 * there is an easy-to-use kernel isprint(). 589 */ 590 if (*check >= 0x7f) { 591 error = SET_ERROR(EINVAL); 592 break; 593 } 594 check++; 595 } 596 if (strlen(strval) > ZPROP_MAX_COMMENT) 597 error = E2BIG; 598 break; 599 600 case ZPOOL_PROP_DEDUPDITTO: 601 if (spa_version(spa) < SPA_VERSION_DEDUP) 602 error = SET_ERROR(ENOTSUP); 603 else 604 error = nvpair_value_uint64(elem, &intval); 605 if (error == 0 && 606 intval != 0 && intval < ZIO_DEDUPDITTO_MIN) 607 error = SET_ERROR(EINVAL); 608 break; 609 } 610 611 if (error) 612 break; 613 } 614 615 if (!error && reset_bootfs) { 616 error = nvlist_remove(props, 617 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); 618 619 if (!error) { 620 error = nvlist_add_uint64(props, 621 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); 622 } 623 } 624 625 return (error); 626} 627 628void 629spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) 630{ 631 char *cachefile; 632 spa_config_dirent_t *dp; 633 634 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), 635 &cachefile) != 0) 636 return; 637 638 dp = kmem_alloc(sizeof (spa_config_dirent_t), 639 KM_SLEEP); 640 641 if (cachefile[0] == '\0') 642 dp->scd_path = spa_strdup(spa_config_path); 643 else if (strcmp(cachefile, "none") == 0) 644 dp->scd_path = NULL; 645 else 646 dp->scd_path = spa_strdup(cachefile); 647 648 list_insert_head(&spa->spa_config_list, dp); 649 if (need_sync) 650 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 651} 652 653int 654spa_prop_set(spa_t *spa, nvlist_t *nvp) 655{ 656 int error; 657 nvpair_t *elem = NULL; 658 boolean_t need_sync = B_FALSE; 659 660 if ((error = spa_prop_validate(spa, nvp)) != 0) 661 return (error); 662 663 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { 664 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); 665 666 if (prop == ZPOOL_PROP_CACHEFILE || 667 prop == ZPOOL_PROP_ALTROOT || 668 prop == ZPOOL_PROP_READONLY) 669 continue; 670 671 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) { 672 uint64_t ver; 673 674 if (prop == ZPOOL_PROP_VERSION) { 675 VERIFY(nvpair_value_uint64(elem, &ver) == 0); 676 } else { 677 ASSERT(zpool_prop_feature(nvpair_name(elem))); 678 ver = SPA_VERSION_FEATURES; 679 need_sync = B_TRUE; 680 } 681 682 /* Save time if the version is already set. */ 683 if (ver == spa_version(spa)) 684 continue; 685 686 /* 687 * In addition to the pool directory object, we might 688 * create the pool properties object, the features for 689 * read object, the features for write object, or the 690 * feature descriptions object. 691 */ 692 error = dsl_sync_task(spa->spa_name, NULL, 693 spa_sync_version, &ver, 6); 694 if (error) 695 return (error); 696 continue; 697 } 698 699 need_sync = B_TRUE; 700 break; 701 } 702 703 if (need_sync) { 704 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props, 705 nvp, 6)); 706 } 707 708 return (0); 709} 710 711/* 712 * If the bootfs property value is dsobj, clear it. 713 */ 714void 715spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) 716{ 717 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { 718 VERIFY(zap_remove(spa->spa_meta_objset, 719 spa->spa_pool_props_object, 720 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); 721 spa->spa_bootfs = 0; 722 } 723} 724 725/*ARGSUSED*/ 726static int 727spa_change_guid_check(void *arg, dmu_tx_t *tx) 728{ 729 uint64_t *newguid = arg; 730 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 731 vdev_t *rvd = spa->spa_root_vdev; 732 uint64_t vdev_state; 733 734 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 735 vdev_state = rvd->vdev_state; 736 spa_config_exit(spa, SCL_STATE, FTAG); 737 738 if (vdev_state != VDEV_STATE_HEALTHY) 739 return (SET_ERROR(ENXIO)); 740 741 ASSERT3U(spa_guid(spa), !=, *newguid); 742 743 return (0); 744} 745 746static void 747spa_change_guid_sync(void *arg, dmu_tx_t *tx) 748{ 749 uint64_t *newguid = arg; 750 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 751 uint64_t oldguid; 752 vdev_t *rvd = spa->spa_root_vdev; 753 754 oldguid = spa_guid(spa); 755 756 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 757 rvd->vdev_guid = *newguid; 758 rvd->vdev_guid_sum += (*newguid - oldguid); 759 vdev_config_dirty(rvd); 760 spa_config_exit(spa, SCL_STATE, FTAG); 761 762 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu", 763 oldguid, *newguid); 764} 765 766/* 767 * Change the GUID for the pool. This is done so that we can later 768 * re-import a pool built from a clone of our own vdevs. We will modify 769 * the root vdev's guid, our own pool guid, and then mark all of our 770 * vdevs dirty. Note that we must make sure that all our vdevs are 771 * online when we do this, or else any vdevs that weren't present 772 * would be orphaned from our pool. We are also going to issue a 773 * sysevent to update any watchers. 774 */ 775int 776spa_change_guid(spa_t *spa) 777{ 778 int error; 779 uint64_t guid; 780 781 mutex_enter(&spa->spa_vdev_top_lock); 782 mutex_enter(&spa_namespace_lock); 783 guid = spa_generate_guid(NULL); 784 785 error = dsl_sync_task(spa->spa_name, spa_change_guid_check, 786 spa_change_guid_sync, &guid, 5); 787 788 if (error == 0) { 789 spa_config_sync(spa, B_FALSE, B_TRUE); 790 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID); 791 } 792 793 mutex_exit(&spa_namespace_lock); 794 mutex_exit(&spa->spa_vdev_top_lock); 795 796 return (error); 797} 798 799/* 800 * ========================================================================== 801 * SPA state manipulation (open/create/destroy/import/export) 802 * ========================================================================== 803 */ 804 805static int 806spa_error_entry_compare(const void *a, const void *b) 807{ 808 spa_error_entry_t *sa = (spa_error_entry_t *)a; 809 spa_error_entry_t *sb = (spa_error_entry_t *)b; 810 int ret; 811 812 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, 813 sizeof (zbookmark_phys_t)); 814 815 if (ret < 0) 816 return (-1); 817 else if (ret > 0) 818 return (1); 819 else 820 return (0); 821} 822 823/* 824 * Utility function which retrieves copies of the current logs and 825 * re-initializes them in the process. 826 */ 827void 828spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 829{ 830 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); 831 832 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); 833 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); 834 835 avl_create(&spa->spa_errlist_scrub, 836 spa_error_entry_compare, sizeof (spa_error_entry_t), 837 offsetof(spa_error_entry_t, se_avl)); 838 avl_create(&spa->spa_errlist_last, 839 spa_error_entry_compare, sizeof (spa_error_entry_t), 840 offsetof(spa_error_entry_t, se_avl)); 841} 842 843static void 844spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 845{ 846 const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; 847 enum zti_modes mode = ztip->zti_mode; 848 uint_t value = ztip->zti_value; 849 uint_t count = ztip->zti_count; 850 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 851 char name[32]; 852 uint_t flags = 0; 853 boolean_t batch = B_FALSE; 854 855 if (mode == ZTI_MODE_NULL) { 856 tqs->stqs_count = 0; 857 tqs->stqs_taskq = NULL; 858 return; 859 } 860 861 ASSERT3U(count, >, 0); 862 863 tqs->stqs_count = count; 864 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP); 865 866 switch (mode) { 867 case ZTI_MODE_FIXED: 868 ASSERT3U(value, >=, 1); 869 value = MAX(value, 1); 870 break; 871 872 case ZTI_MODE_BATCH: 873 batch = B_TRUE; 874 flags |= TASKQ_THREADS_CPU_PCT; 875 value = zio_taskq_batch_pct; 876 break; 877 878 default: 879 panic("unrecognized mode for %s_%s taskq (%u:%u) in " 880 "spa_activate()", 881 zio_type_name[t], zio_taskq_types[q], mode, value); 882 break; 883 } 884 885 for (uint_t i = 0; i < count; i++) { 886 taskq_t *tq; 887 888 if (count > 1) { 889 (void) snprintf(name, sizeof (name), "%s_%s_%u", 890 zio_type_name[t], zio_taskq_types[q], i); 891 } else { 892 (void) snprintf(name, sizeof (name), "%s_%s", 893 zio_type_name[t], zio_taskq_types[q]); 894 } 895 896#ifdef SYSDC 897 if (zio_taskq_sysdc && spa->spa_proc != &p0) { 898 if (batch) 899 flags |= TASKQ_DC_BATCH; 900 901 tq = taskq_create_sysdc(name, value, 50, INT_MAX, 902 spa->spa_proc, zio_taskq_basedc, flags); 903 } else { 904#endif 905 pri_t pri = maxclsyspri; 906 /* 907 * The write issue taskq can be extremely CPU 908 * intensive. Run it at slightly lower priority 909 * than the other taskqs. 910 */ 911 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) 912 pri--; 913 914 tq = taskq_create_proc(name, value, pri, 50, 915 INT_MAX, spa->spa_proc, flags); 916#ifdef SYSDC 917 } 918#endif 919 920 tqs->stqs_taskq[i] = tq; 921 } 922} 923 924static void 925spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 926{ 927 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 928 929 if (tqs->stqs_taskq == NULL) { 930 ASSERT0(tqs->stqs_count); 931 return; 932 } 933 934 for (uint_t i = 0; i < tqs->stqs_count; i++) { 935 ASSERT3P(tqs->stqs_taskq[i], !=, NULL); 936 taskq_destroy(tqs->stqs_taskq[i]); 937 } 938 939 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *)); 940 tqs->stqs_taskq = NULL; 941} 942 943/* 944 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority. 945 * Note that a type may have multiple discrete taskqs to avoid lock contention 946 * on the taskq itself. In that case we choose which taskq at random by using 947 * the low bits of gethrtime(). 948 */ 949void 950spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 951 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent) 952{ 953 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 954 taskq_t *tq; 955 956 ASSERT3P(tqs->stqs_taskq, !=, NULL); 957 ASSERT3U(tqs->stqs_count, !=, 0); 958 959 if (tqs->stqs_count == 1) { 960 tq = tqs->stqs_taskq[0]; 961 } else { 962#ifdef _KERNEL 963 tq = tqs->stqs_taskq[cpu_ticks() % tqs->stqs_count]; 964#else 965 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 966#endif 967 } 968 969 taskq_dispatch_ent(tq, func, arg, flags, ent); 970} 971 972static void 973spa_create_zio_taskqs(spa_t *spa) 974{ 975 for (int t = 0; t < ZIO_TYPES; t++) { 976 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 977 spa_taskqs_init(spa, t, q); 978 } 979 } 980} 981 982#ifdef _KERNEL 983#ifdef SPA_PROCESS 984static void 985spa_thread(void *arg) 986{ 987 callb_cpr_t cprinfo; 988 989 spa_t *spa = arg; 990 user_t *pu = PTOU(curproc); 991 992 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 993 spa->spa_name); 994 995 ASSERT(curproc != &p0); 996 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 997 "zpool-%s", spa->spa_name); 998 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 999 1000#ifdef PSRSET_BIND 1001 /* bind this thread to the requested psrset */ 1002 if (zio_taskq_psrset_bind != PS_NONE) { 1003 pool_lock(); 1004 mutex_enter(&cpu_lock); 1005 mutex_enter(&pidlock); 1006 mutex_enter(&curproc->p_lock); 1007 1008 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 1009 0, NULL, NULL) == 0) { 1010 curthread->t_bind_pset = zio_taskq_psrset_bind; 1011 } else { 1012 cmn_err(CE_WARN, 1013 "Couldn't bind process for zfs pool \"%s\" to " 1014 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1015 } 1016 1017 mutex_exit(&curproc->p_lock); 1018 mutex_exit(&pidlock); 1019 mutex_exit(&cpu_lock); 1020 pool_unlock(); 1021 } 1022#endif 1023 1024#ifdef SYSDC 1025 if (zio_taskq_sysdc) { 1026 sysdc_thread_enter(curthread, 100, 0); 1027 } 1028#endif 1029 1030 spa->spa_proc = curproc; 1031 spa->spa_did = curthread->t_did; 1032 1033 spa_create_zio_taskqs(spa); 1034 1035 mutex_enter(&spa->spa_proc_lock); 1036 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1037 1038 spa->spa_proc_state = SPA_PROC_ACTIVE; 1039 cv_broadcast(&spa->spa_proc_cv); 1040 1041 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1042 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1043 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1044 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1045 1046 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1047 spa->spa_proc_state = SPA_PROC_GONE; 1048 spa->spa_proc = &p0; 1049 cv_broadcast(&spa->spa_proc_cv); 1050 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1051 1052 mutex_enter(&curproc->p_lock); 1053 lwp_exit(); 1054} 1055#endif /* SPA_PROCESS */ 1056#endif 1057 1058/* 1059 * Activate an uninitialized pool. 1060 */ 1061static void 1062spa_activate(spa_t *spa, int mode) 1063{ 1064 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1065 1066 spa->spa_state = POOL_STATE_ACTIVE; 1067 spa->spa_mode = mode; 1068 1069 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1070 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1071 1072 /* Try to create a covering process */ 1073 mutex_enter(&spa->spa_proc_lock); 1074 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1075 ASSERT(spa->spa_proc == &p0); 1076 spa->spa_did = 0; 1077 1078#ifdef SPA_PROCESS 1079 /* Only create a process if we're going to be around a while. */ 1080 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1081 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1082 NULL, 0) == 0) { 1083 spa->spa_proc_state = SPA_PROC_CREATED; 1084 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1085 cv_wait(&spa->spa_proc_cv, 1086 &spa->spa_proc_lock); 1087 } 1088 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1089 ASSERT(spa->spa_proc != &p0); 1090 ASSERT(spa->spa_did != 0); 1091 } else { 1092#ifdef _KERNEL 1093 cmn_err(CE_WARN, 1094 "Couldn't create process for zfs pool \"%s\"\n", 1095 spa->spa_name); 1096#endif 1097 } 1098 } 1099#endif /* SPA_PROCESS */ 1100 mutex_exit(&spa->spa_proc_lock); 1101 1102 /* If we didn't create a process, we need to create our taskqs. */ 1103 ASSERT(spa->spa_proc == &p0); 1104 if (spa->spa_proc == &p0) { 1105 spa_create_zio_taskqs(spa); 1106 } 1107 1108 /* 1109 * Start TRIM thread. 1110 */ 1111 trim_thread_create(spa); 1112 1113 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1114 offsetof(vdev_t, vdev_config_dirty_node)); 1115 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1116 offsetof(vdev_t, vdev_state_dirty_node)); 1117 1118 txg_list_create(&spa->spa_vdev_txg_list, 1119 offsetof(struct vdev, vdev_txg_node)); 1120 1121 avl_create(&spa->spa_errlist_scrub, 1122 spa_error_entry_compare, sizeof (spa_error_entry_t), 1123 offsetof(spa_error_entry_t, se_avl)); 1124 avl_create(&spa->spa_errlist_last, 1125 spa_error_entry_compare, sizeof (spa_error_entry_t), 1126 offsetof(spa_error_entry_t, se_avl)); 1127} 1128 1129/* 1130 * Opposite of spa_activate(). 1131 */ 1132static void 1133spa_deactivate(spa_t *spa) 1134{ 1135 ASSERT(spa->spa_sync_on == B_FALSE); 1136 ASSERT(spa->spa_dsl_pool == NULL); 1137 ASSERT(spa->spa_root_vdev == NULL); 1138 ASSERT(spa->spa_async_zio_root == NULL); 1139 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1140 1141 /* 1142 * Stop TRIM thread in case spa_unload() wasn't called directly 1143 * before spa_deactivate(). 1144 */ 1145 trim_thread_destroy(spa); 1146 1147 txg_list_destroy(&spa->spa_vdev_txg_list); 1148 1149 list_destroy(&spa->spa_config_dirty_list); 1150 list_destroy(&spa->spa_state_dirty_list); 1151 1152 for (int t = 0; t < ZIO_TYPES; t++) { 1153 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1154 spa_taskqs_fini(spa, t, q); 1155 } 1156 } 1157 1158 metaslab_class_destroy(spa->spa_normal_class); 1159 spa->spa_normal_class = NULL; 1160 1161 metaslab_class_destroy(spa->spa_log_class); 1162 spa->spa_log_class = NULL; 1163 1164 /* 1165 * If this was part of an import or the open otherwise failed, we may 1166 * still have errors left in the queues. Empty them just in case. 1167 */ 1168 spa_errlog_drain(spa); 1169 1170 avl_destroy(&spa->spa_errlist_scrub); 1171 avl_destroy(&spa->spa_errlist_last); 1172 1173 spa->spa_state = POOL_STATE_UNINITIALIZED; 1174 1175 mutex_enter(&spa->spa_proc_lock); 1176 if (spa->spa_proc_state != SPA_PROC_NONE) { 1177 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1178 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1179 cv_broadcast(&spa->spa_proc_cv); 1180 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1181 ASSERT(spa->spa_proc != &p0); 1182 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1183 } 1184 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1185 spa->spa_proc_state = SPA_PROC_NONE; 1186 } 1187 ASSERT(spa->spa_proc == &p0); 1188 mutex_exit(&spa->spa_proc_lock); 1189 1190#ifdef SPA_PROCESS 1191 /* 1192 * We want to make sure spa_thread() has actually exited the ZFS 1193 * module, so that the module can't be unloaded out from underneath 1194 * it. 1195 */ 1196 if (spa->spa_did != 0) { 1197 thread_join(spa->spa_did); 1198 spa->spa_did = 0; 1199 } 1200#endif /* SPA_PROCESS */ 1201} 1202 1203/* 1204 * Verify a pool configuration, and construct the vdev tree appropriately. This 1205 * will create all the necessary vdevs in the appropriate layout, with each vdev 1206 * in the CLOSED state. This will prep the pool before open/creation/import. 1207 * All vdev validation is done by the vdev_alloc() routine. 1208 */ 1209static int 1210spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1211 uint_t id, int atype) 1212{ 1213 nvlist_t **child; 1214 uint_t children; 1215 int error; 1216 1217 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1218 return (error); 1219 1220 if ((*vdp)->vdev_ops->vdev_op_leaf) 1221 return (0); 1222 1223 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1224 &child, &children); 1225 1226 if (error == ENOENT) 1227 return (0); 1228 1229 if (error) { 1230 vdev_free(*vdp); 1231 *vdp = NULL; 1232 return (SET_ERROR(EINVAL)); 1233 } 1234 1235 for (int c = 0; c < children; c++) { 1236 vdev_t *vd; 1237 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1238 atype)) != 0) { 1239 vdev_free(*vdp); 1240 *vdp = NULL; 1241 return (error); 1242 } 1243 } 1244 1245 ASSERT(*vdp != NULL); 1246 1247 return (0); 1248} 1249 1250/* 1251 * Opposite of spa_load(). 1252 */ 1253static void 1254spa_unload(spa_t *spa) 1255{ 1256 int i; 1257 1258 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1259 1260 /* 1261 * Stop TRIM thread. 1262 */ 1263 trim_thread_destroy(spa); 1264 1265 /* 1266 * Stop async tasks. 1267 */ 1268 spa_async_suspend(spa); 1269 1270 /* 1271 * Stop syncing. 1272 */ 1273 if (spa->spa_sync_on) { 1274 txg_sync_stop(spa->spa_dsl_pool); 1275 spa->spa_sync_on = B_FALSE; 1276 } 1277 1278 /* 1279 * Wait for any outstanding async I/O to complete. 1280 */ 1281 if (spa->spa_async_zio_root != NULL) { 1282 (void) zio_wait(spa->spa_async_zio_root); 1283 spa->spa_async_zio_root = NULL; 1284 } 1285 1286 bpobj_close(&spa->spa_deferred_bpobj); 1287 1288 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1289 1290 /* 1291 * Close all vdevs. 1292 */ 1293 if (spa->spa_root_vdev) 1294 vdev_free(spa->spa_root_vdev); 1295 ASSERT(spa->spa_root_vdev == NULL); 1296 1297 /* 1298 * Close the dsl pool. 1299 */ 1300 if (spa->spa_dsl_pool) { 1301 dsl_pool_close(spa->spa_dsl_pool); 1302 spa->spa_dsl_pool = NULL; 1303 spa->spa_meta_objset = NULL; 1304 } 1305 1306 ddt_unload(spa); 1307 1308 1309 /* 1310 * Drop and purge level 2 cache 1311 */ 1312 spa_l2cache_drop(spa); 1313 1314 for (i = 0; i < spa->spa_spares.sav_count; i++) 1315 vdev_free(spa->spa_spares.sav_vdevs[i]); 1316 if (spa->spa_spares.sav_vdevs) { 1317 kmem_free(spa->spa_spares.sav_vdevs, 1318 spa->spa_spares.sav_count * sizeof (void *)); 1319 spa->spa_spares.sav_vdevs = NULL; 1320 } 1321 if (spa->spa_spares.sav_config) { 1322 nvlist_free(spa->spa_spares.sav_config); 1323 spa->spa_spares.sav_config = NULL; 1324 } 1325 spa->spa_spares.sav_count = 0; 1326 1327 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1328 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1329 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1330 } 1331 if (spa->spa_l2cache.sav_vdevs) { 1332 kmem_free(spa->spa_l2cache.sav_vdevs, 1333 spa->spa_l2cache.sav_count * sizeof (void *)); 1334 spa->spa_l2cache.sav_vdevs = NULL; 1335 } 1336 if (spa->spa_l2cache.sav_config) { 1337 nvlist_free(spa->spa_l2cache.sav_config); 1338 spa->spa_l2cache.sav_config = NULL; 1339 } 1340 spa->spa_l2cache.sav_count = 0; 1341 1342 spa->spa_async_suspended = 0; 1343 1344 if (spa->spa_comment != NULL) { 1345 spa_strfree(spa->spa_comment); 1346 spa->spa_comment = NULL; 1347 } 1348 1349 spa_config_exit(spa, SCL_ALL, FTAG); 1350} 1351 1352/* 1353 * Load (or re-load) the current list of vdevs describing the active spares for 1354 * this pool. When this is called, we have some form of basic information in 1355 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1356 * then re-generate a more complete list including status information. 1357 */ 1358static void 1359spa_load_spares(spa_t *spa) 1360{ 1361 nvlist_t **spares; 1362 uint_t nspares; 1363 int i; 1364 vdev_t *vd, *tvd; 1365 1366 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1367 1368 /* 1369 * First, close and free any existing spare vdevs. 1370 */ 1371 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1372 vd = spa->spa_spares.sav_vdevs[i]; 1373 1374 /* Undo the call to spa_activate() below */ 1375 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1376 B_FALSE)) != NULL && tvd->vdev_isspare) 1377 spa_spare_remove(tvd); 1378 vdev_close(vd); 1379 vdev_free(vd); 1380 } 1381 1382 if (spa->spa_spares.sav_vdevs) 1383 kmem_free(spa->spa_spares.sav_vdevs, 1384 spa->spa_spares.sav_count * sizeof (void *)); 1385 1386 if (spa->spa_spares.sav_config == NULL) 1387 nspares = 0; 1388 else 1389 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1390 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1391 1392 spa->spa_spares.sav_count = (int)nspares; 1393 spa->spa_spares.sav_vdevs = NULL; 1394 1395 if (nspares == 0) 1396 return; 1397 1398 /* 1399 * Construct the array of vdevs, opening them to get status in the 1400 * process. For each spare, there is potentially two different vdev_t 1401 * structures associated with it: one in the list of spares (used only 1402 * for basic validation purposes) and one in the active vdev 1403 * configuration (if it's spared in). During this phase we open and 1404 * validate each vdev on the spare list. If the vdev also exists in the 1405 * active configuration, then we also mark this vdev as an active spare. 1406 */ 1407 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1408 KM_SLEEP); 1409 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1410 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1411 VDEV_ALLOC_SPARE) == 0); 1412 ASSERT(vd != NULL); 1413 1414 spa->spa_spares.sav_vdevs[i] = vd; 1415 1416 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1417 B_FALSE)) != NULL) { 1418 if (!tvd->vdev_isspare) 1419 spa_spare_add(tvd); 1420 1421 /* 1422 * We only mark the spare active if we were successfully 1423 * able to load the vdev. Otherwise, importing a pool 1424 * with a bad active spare would result in strange 1425 * behavior, because multiple pool would think the spare 1426 * is actively in use. 1427 * 1428 * There is a vulnerability here to an equally bizarre 1429 * circumstance, where a dead active spare is later 1430 * brought back to life (onlined or otherwise). Given 1431 * the rarity of this scenario, and the extra complexity 1432 * it adds, we ignore the possibility. 1433 */ 1434 if (!vdev_is_dead(tvd)) 1435 spa_spare_activate(tvd); 1436 } 1437 1438 vd->vdev_top = vd; 1439 vd->vdev_aux = &spa->spa_spares; 1440 1441 if (vdev_open(vd) != 0) 1442 continue; 1443 1444 if (vdev_validate_aux(vd) == 0) 1445 spa_spare_add(vd); 1446 } 1447 1448 /* 1449 * Recompute the stashed list of spares, with status information 1450 * this time. 1451 */ 1452 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1453 DATA_TYPE_NVLIST_ARRAY) == 0); 1454 1455 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1456 KM_SLEEP); 1457 for (i = 0; i < spa->spa_spares.sav_count; i++) 1458 spares[i] = vdev_config_generate(spa, 1459 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1460 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1461 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1462 for (i = 0; i < spa->spa_spares.sav_count; i++) 1463 nvlist_free(spares[i]); 1464 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1465} 1466 1467/* 1468 * Load (or re-load) the current list of vdevs describing the active l2cache for 1469 * this pool. When this is called, we have some form of basic information in 1470 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1471 * then re-generate a more complete list including status information. 1472 * Devices which are already active have their details maintained, and are 1473 * not re-opened. 1474 */ 1475static void 1476spa_load_l2cache(spa_t *spa) 1477{ 1478 nvlist_t **l2cache; 1479 uint_t nl2cache; 1480 int i, j, oldnvdevs; 1481 uint64_t guid; 1482 vdev_t *vd, **oldvdevs, **newvdevs; 1483 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1484 1485 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1486 1487 if (sav->sav_config != NULL) { 1488 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1489 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1490 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1491 } else { 1492 nl2cache = 0; 1493 newvdevs = NULL; 1494 } 1495 1496 oldvdevs = sav->sav_vdevs; 1497 oldnvdevs = sav->sav_count; 1498 sav->sav_vdevs = NULL; 1499 sav->sav_count = 0; 1500 1501 /* 1502 * Process new nvlist of vdevs. 1503 */ 1504 for (i = 0; i < nl2cache; i++) { 1505 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1506 &guid) == 0); 1507 1508 newvdevs[i] = NULL; 1509 for (j = 0; j < oldnvdevs; j++) { 1510 vd = oldvdevs[j]; 1511 if (vd != NULL && guid == vd->vdev_guid) { 1512 /* 1513 * Retain previous vdev for add/remove ops. 1514 */ 1515 newvdevs[i] = vd; 1516 oldvdevs[j] = NULL; 1517 break; 1518 } 1519 } 1520 1521 if (newvdevs[i] == NULL) { 1522 /* 1523 * Create new vdev 1524 */ 1525 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1526 VDEV_ALLOC_L2CACHE) == 0); 1527 ASSERT(vd != NULL); 1528 newvdevs[i] = vd; 1529 1530 /* 1531 * Commit this vdev as an l2cache device, 1532 * even if it fails to open. 1533 */ 1534 spa_l2cache_add(vd); 1535 1536 vd->vdev_top = vd; 1537 vd->vdev_aux = sav; 1538 1539 spa_l2cache_activate(vd); 1540 1541 if (vdev_open(vd) != 0) 1542 continue; 1543 1544 (void) vdev_validate_aux(vd); 1545 1546 if (!vdev_is_dead(vd)) 1547 l2arc_add_vdev(spa, vd); 1548 } 1549 } 1550 1551 /* 1552 * Purge vdevs that were dropped 1553 */ 1554 for (i = 0; i < oldnvdevs; i++) { 1555 uint64_t pool; 1556 1557 vd = oldvdevs[i]; 1558 if (vd != NULL) { 1559 ASSERT(vd->vdev_isl2cache); 1560 1561 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1562 pool != 0ULL && l2arc_vdev_present(vd)) 1563 l2arc_remove_vdev(vd); 1564 vdev_clear_stats(vd); 1565 vdev_free(vd); 1566 } 1567 } 1568 1569 if (oldvdevs) 1570 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1571 1572 if (sav->sav_config == NULL) 1573 goto out; 1574 1575 sav->sav_vdevs = newvdevs; 1576 sav->sav_count = (int)nl2cache; 1577 1578 /* 1579 * Recompute the stashed list of l2cache devices, with status 1580 * information this time. 1581 */ 1582 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1583 DATA_TYPE_NVLIST_ARRAY) == 0); 1584 1585 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1586 for (i = 0; i < sav->sav_count; i++) 1587 l2cache[i] = vdev_config_generate(spa, 1588 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1589 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1590 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1591out: 1592 for (i = 0; i < sav->sav_count; i++) 1593 nvlist_free(l2cache[i]); 1594 if (sav->sav_count) 1595 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1596} 1597 1598static int 1599load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1600{ 1601 dmu_buf_t *db; 1602 char *packed = NULL; 1603 size_t nvsize = 0; 1604 int error; 1605 *value = NULL; 1606 1607 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1608 if (error != 0) 1609 return (error); 1610 nvsize = *(uint64_t *)db->db_data; 1611 dmu_buf_rele(db, FTAG); 1612 1613 packed = kmem_alloc(nvsize, KM_SLEEP); 1614 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1615 DMU_READ_PREFETCH); 1616 if (error == 0) 1617 error = nvlist_unpack(packed, nvsize, value, 0); 1618 kmem_free(packed, nvsize); 1619 1620 return (error); 1621} 1622 1623/* 1624 * Checks to see if the given vdev could not be opened, in which case we post a 1625 * sysevent to notify the autoreplace code that the device has been removed. 1626 */ 1627static void 1628spa_check_removed(vdev_t *vd) 1629{ 1630 for (int c = 0; c < vd->vdev_children; c++) 1631 spa_check_removed(vd->vdev_child[c]); 1632 1633 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1634 !vd->vdev_ishole) { 1635 zfs_post_autoreplace(vd->vdev_spa, vd); 1636 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); 1637 } 1638} 1639 1640/* 1641 * Validate the current config against the MOS config 1642 */ 1643static boolean_t 1644spa_config_valid(spa_t *spa, nvlist_t *config) 1645{ 1646 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 1647 nvlist_t *nv; 1648 1649 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); 1650 1651 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1652 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 1653 1654 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); 1655 1656 /* 1657 * If we're doing a normal import, then build up any additional 1658 * diagnostic information about missing devices in this config. 1659 * We'll pass this up to the user for further processing. 1660 */ 1661 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1662 nvlist_t **child, *nv; 1663 uint64_t idx = 0; 1664 1665 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1666 KM_SLEEP); 1667 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1668 1669 for (int c = 0; c < rvd->vdev_children; c++) { 1670 vdev_t *tvd = rvd->vdev_child[c]; 1671 vdev_t *mtvd = mrvd->vdev_child[c]; 1672 1673 if (tvd->vdev_ops == &vdev_missing_ops && 1674 mtvd->vdev_ops != &vdev_missing_ops && 1675 mtvd->vdev_islog) 1676 child[idx++] = vdev_config_generate(spa, mtvd, 1677 B_FALSE, 0); 1678 } 1679 1680 if (idx) { 1681 VERIFY(nvlist_add_nvlist_array(nv, 1682 ZPOOL_CONFIG_CHILDREN, child, idx) == 0); 1683 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 1684 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); 1685 1686 for (int i = 0; i < idx; i++) 1687 nvlist_free(child[i]); 1688 } 1689 nvlist_free(nv); 1690 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1691 } 1692 1693 /* 1694 * Compare the root vdev tree with the information we have 1695 * from the MOS config (mrvd). Check each top-level vdev 1696 * with the corresponding MOS config top-level (mtvd). 1697 */ 1698 for (int c = 0; c < rvd->vdev_children; c++) { 1699 vdev_t *tvd = rvd->vdev_child[c]; 1700 vdev_t *mtvd = mrvd->vdev_child[c]; 1701 1702 /* 1703 * Resolve any "missing" vdevs in the current configuration. 1704 * If we find that the MOS config has more accurate information 1705 * about the top-level vdev then use that vdev instead. 1706 */ 1707 if (tvd->vdev_ops == &vdev_missing_ops && 1708 mtvd->vdev_ops != &vdev_missing_ops) { 1709 1710 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) 1711 continue; 1712 1713 /* 1714 * Device specific actions. 1715 */ 1716 if (mtvd->vdev_islog) { 1717 spa_set_log_state(spa, SPA_LOG_CLEAR); 1718 } else { 1719 /* 1720 * XXX - once we have 'readonly' pool 1721 * support we should be able to handle 1722 * missing data devices by transitioning 1723 * the pool to readonly. 1724 */ 1725 continue; 1726 } 1727 1728 /* 1729 * Swap the missing vdev with the data we were 1730 * able to obtain from the MOS config. 1731 */ 1732 vdev_remove_child(rvd, tvd); 1733 vdev_remove_child(mrvd, mtvd); 1734 1735 vdev_add_child(rvd, mtvd); 1736 vdev_add_child(mrvd, tvd); 1737 1738 spa_config_exit(spa, SCL_ALL, FTAG); 1739 vdev_load(mtvd); 1740 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1741 1742 vdev_reopen(rvd); 1743 } else if (mtvd->vdev_islog) { 1744 /* 1745 * Load the slog device's state from the MOS config 1746 * since it's possible that the label does not 1747 * contain the most up-to-date information. 1748 */ 1749 vdev_load_log_state(tvd, mtvd); 1750 vdev_reopen(tvd); 1751 } 1752 } 1753 vdev_free(mrvd); 1754 spa_config_exit(spa, SCL_ALL, FTAG); 1755 1756 /* 1757 * Ensure we were able to validate the config. 1758 */ 1759 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); 1760} 1761 1762/* 1763 * Check for missing log devices 1764 */ 1765static boolean_t 1766spa_check_logs(spa_t *spa) 1767{ 1768 boolean_t rv = B_FALSE; 1769 1770 switch (spa->spa_log_state) { 1771 case SPA_LOG_MISSING: 1772 /* need to recheck in case slog has been restored */ 1773 case SPA_LOG_UNKNOWN: 1774 rv = (dmu_objset_find(spa->spa_name, zil_check_log_chain, 1775 NULL, DS_FIND_CHILDREN) != 0); 1776 if (rv) 1777 spa_set_log_state(spa, SPA_LOG_MISSING); 1778 break; 1779 } 1780 return (rv); 1781} 1782 1783static boolean_t 1784spa_passivate_log(spa_t *spa) 1785{ 1786 vdev_t *rvd = spa->spa_root_vdev; 1787 boolean_t slog_found = B_FALSE; 1788 1789 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1790 1791 if (!spa_has_slogs(spa)) 1792 return (B_FALSE); 1793 1794 for (int c = 0; c < rvd->vdev_children; c++) { 1795 vdev_t *tvd = rvd->vdev_child[c]; 1796 metaslab_group_t *mg = tvd->vdev_mg; 1797 1798 if (tvd->vdev_islog) { 1799 metaslab_group_passivate(mg); 1800 slog_found = B_TRUE; 1801 } 1802 } 1803 1804 return (slog_found); 1805} 1806 1807static void 1808spa_activate_log(spa_t *spa) 1809{ 1810 vdev_t *rvd = spa->spa_root_vdev; 1811 1812 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1813 1814 for (int c = 0; c < rvd->vdev_children; c++) { 1815 vdev_t *tvd = rvd->vdev_child[c]; 1816 metaslab_group_t *mg = tvd->vdev_mg; 1817 1818 if (tvd->vdev_islog) 1819 metaslab_group_activate(mg); 1820 } 1821} 1822 1823int 1824spa_offline_log(spa_t *spa) 1825{ 1826 int error; 1827 1828 error = dmu_objset_find(spa_name(spa), zil_vdev_offline, 1829 NULL, DS_FIND_CHILDREN); 1830 if (error == 0) { 1831 /* 1832 * We successfully offlined the log device, sync out the 1833 * current txg so that the "stubby" block can be removed 1834 * by zil_sync(). 1835 */ 1836 txg_wait_synced(spa->spa_dsl_pool, 0); 1837 } 1838 return (error); 1839} 1840 1841static void 1842spa_aux_check_removed(spa_aux_vdev_t *sav) 1843{ 1844 int i; 1845 1846 for (i = 0; i < sav->sav_count; i++) 1847 spa_check_removed(sav->sav_vdevs[i]); 1848} 1849 1850void 1851spa_claim_notify(zio_t *zio) 1852{ 1853 spa_t *spa = zio->io_spa; 1854 1855 if (zio->io_error) 1856 return; 1857 1858 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1859 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1860 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1861 mutex_exit(&spa->spa_props_lock); 1862} 1863 1864typedef struct spa_load_error { 1865 uint64_t sle_meta_count; 1866 uint64_t sle_data_count; 1867} spa_load_error_t; 1868 1869static void 1870spa_load_verify_done(zio_t *zio) 1871{ 1872 blkptr_t *bp = zio->io_bp; 1873 spa_load_error_t *sle = zio->io_private; 1874 dmu_object_type_t type = BP_GET_TYPE(bp); 1875 int error = zio->io_error; 1876 1877 if (error) { 1878 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 1879 type != DMU_OT_INTENT_LOG) 1880 atomic_add_64(&sle->sle_meta_count, 1); 1881 else 1882 atomic_add_64(&sle->sle_data_count, 1); 1883 } 1884 zio_data_buf_free(zio->io_data, zio->io_size); 1885} 1886 1887/*ARGSUSED*/ 1888static int 1889spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1890 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 1891{ 1892 if (!BP_IS_HOLE(bp) && !BP_IS_EMBEDDED(bp)) { 1893 zio_t *rio = arg; 1894 size_t size = BP_GET_PSIZE(bp); 1895 void *data = zio_data_buf_alloc(size); 1896 1897 zio_nowait(zio_read(rio, spa, bp, data, size, 1898 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 1899 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 1900 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 1901 } 1902 return (0); 1903} 1904 1905static int 1906spa_load_verify(spa_t *spa) 1907{ 1908 zio_t *rio; 1909 spa_load_error_t sle = { 0 }; 1910 zpool_rewind_policy_t policy; 1911 boolean_t verify_ok = B_FALSE; 1912 int error; 1913 1914 zpool_get_rewind_policy(spa->spa_config, &policy); 1915 1916 if (policy.zrp_request & ZPOOL_NEVER_REWIND) 1917 return (0); 1918 1919 rio = zio_root(spa, NULL, &sle, 1920 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1921 1922 error = traverse_pool(spa, spa->spa_verify_min_txg, 1923 TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio); 1924 1925 (void) zio_wait(rio); 1926 1927 spa->spa_load_meta_errors = sle.sle_meta_count; 1928 spa->spa_load_data_errors = sle.sle_data_count; 1929 1930 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && 1931 sle.sle_data_count <= policy.zrp_maxdata) { 1932 int64_t loss = 0; 1933 1934 verify_ok = B_TRUE; 1935 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 1936 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 1937 1938 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 1939 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1940 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 1941 VERIFY(nvlist_add_int64(spa->spa_load_info, 1942 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 1943 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1944 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 1945 } else { 1946 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 1947 } 1948 1949 if (error) { 1950 if (error != ENXIO && error != EIO) 1951 error = SET_ERROR(EIO); 1952 return (error); 1953 } 1954 1955 return (verify_ok ? 0 : EIO); 1956} 1957 1958/* 1959 * Find a value in the pool props object. 1960 */ 1961static void 1962spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 1963{ 1964 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 1965 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 1966} 1967 1968/* 1969 * Find a value in the pool directory object. 1970 */ 1971static int 1972spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) 1973{ 1974 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 1975 name, sizeof (uint64_t), 1, val)); 1976} 1977 1978static int 1979spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 1980{ 1981 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 1982 return (err); 1983} 1984 1985/* 1986 * Fix up config after a partly-completed split. This is done with the 1987 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 1988 * pool have that entry in their config, but only the splitting one contains 1989 * a list of all the guids of the vdevs that are being split off. 1990 * 1991 * This function determines what to do with that list: either rejoin 1992 * all the disks to the pool, or complete the splitting process. To attempt 1993 * the rejoin, each disk that is offlined is marked online again, and 1994 * we do a reopen() call. If the vdev label for every disk that was 1995 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 1996 * then we call vdev_split() on each disk, and complete the split. 1997 * 1998 * Otherwise we leave the config alone, with all the vdevs in place in 1999 * the original pool. 2000 */ 2001static void 2002spa_try_repair(spa_t *spa, nvlist_t *config) 2003{ 2004 uint_t extracted; 2005 uint64_t *glist; 2006 uint_t i, gcount; 2007 nvlist_t *nvl; 2008 vdev_t **vd; 2009 boolean_t attempt_reopen; 2010 2011 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2012 return; 2013 2014 /* check that the config is complete */ 2015 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2016 &glist, &gcount) != 0) 2017 return; 2018 2019 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2020 2021 /* attempt to online all the vdevs & validate */ 2022 attempt_reopen = B_TRUE; 2023 for (i = 0; i < gcount; i++) { 2024 if (glist[i] == 0) /* vdev is hole */ 2025 continue; 2026 2027 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2028 if (vd[i] == NULL) { 2029 /* 2030 * Don't bother attempting to reopen the disks; 2031 * just do the split. 2032 */ 2033 attempt_reopen = B_FALSE; 2034 } else { 2035 /* attempt to re-online it */ 2036 vd[i]->vdev_offline = B_FALSE; 2037 } 2038 } 2039 2040 if (attempt_reopen) { 2041 vdev_reopen(spa->spa_root_vdev); 2042 2043 /* check each device to see what state it's in */ 2044 for (extracted = 0, i = 0; i < gcount; i++) { 2045 if (vd[i] != NULL && 2046 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2047 break; 2048 ++extracted; 2049 } 2050 } 2051 2052 /* 2053 * If every disk has been moved to the new pool, or if we never 2054 * even attempted to look at them, then we split them off for 2055 * good. 2056 */ 2057 if (!attempt_reopen || gcount == extracted) { 2058 for (i = 0; i < gcount; i++) 2059 if (vd[i] != NULL) 2060 vdev_split(vd[i]); 2061 vdev_reopen(spa->spa_root_vdev); 2062 } 2063 2064 kmem_free(vd, gcount * sizeof (vdev_t *)); 2065} 2066 2067static int 2068spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, 2069 boolean_t mosconfig) 2070{ 2071 nvlist_t *config = spa->spa_config; 2072 char *ereport = FM_EREPORT_ZFS_POOL; 2073 char *comment; 2074 int error; 2075 uint64_t pool_guid; 2076 nvlist_t *nvl; 2077 2078 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) 2079 return (SET_ERROR(EINVAL)); 2080 2081 ASSERT(spa->spa_comment == NULL); 2082 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2083 spa->spa_comment = spa_strdup(comment); 2084 2085 /* 2086 * Versioning wasn't explicitly added to the label until later, so if 2087 * it's not present treat it as the initial version. 2088 */ 2089 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2090 &spa->spa_ubsync.ub_version) != 0) 2091 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2092 2093 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2094 &spa->spa_config_txg); 2095 2096 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && 2097 spa_guid_exists(pool_guid, 0)) { 2098 error = SET_ERROR(EEXIST); 2099 } else { 2100 spa->spa_config_guid = pool_guid; 2101 2102 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, 2103 &nvl) == 0) { 2104 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, 2105 KM_SLEEP) == 0); 2106 } 2107 2108 nvlist_free(spa->spa_load_info); 2109 spa->spa_load_info = fnvlist_alloc(); 2110 2111 gethrestime(&spa->spa_loaded_ts); 2112 error = spa_load_impl(spa, pool_guid, config, state, type, 2113 mosconfig, &ereport); 2114 } 2115 2116 spa->spa_minref = refcount_count(&spa->spa_refcount); 2117 if (error) { 2118 if (error != EEXIST) { 2119 spa->spa_loaded_ts.tv_sec = 0; 2120 spa->spa_loaded_ts.tv_nsec = 0; 2121 } 2122 if (error != EBADF) { 2123 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); 2124 } 2125 } 2126 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2127 spa->spa_ena = 0; 2128 2129 return (error); 2130} 2131 2132/* 2133 * Load an existing storage pool, using the pool's builtin spa_config as a 2134 * source of configuration information. 2135 */ 2136static int 2137spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, 2138 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 2139 char **ereport) 2140{ 2141 int error = 0; 2142 nvlist_t *nvroot = NULL; 2143 nvlist_t *label; 2144 vdev_t *rvd; 2145 uberblock_t *ub = &spa->spa_uberblock; 2146 uint64_t children, config_cache_txg = spa->spa_config_txg; 2147 int orig_mode = spa->spa_mode; 2148 int parse; 2149 uint64_t obj; 2150 boolean_t missing_feat_write = B_FALSE; 2151 2152 /* 2153 * If this is an untrusted config, access the pool in read-only mode. 2154 * This prevents things like resilvering recently removed devices. 2155 */ 2156 if (!mosconfig) 2157 spa->spa_mode = FREAD; 2158 2159 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2160 2161 spa->spa_load_state = state; 2162 2163 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) 2164 return (SET_ERROR(EINVAL)); 2165 2166 parse = (type == SPA_IMPORT_EXISTING ? 2167 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2168 2169 /* 2170 * Create "The Godfather" zio to hold all async IOs 2171 */ 2172 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 2173 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 2174 2175 /* 2176 * Parse the configuration into a vdev tree. We explicitly set the 2177 * value that will be returned by spa_version() since parsing the 2178 * configuration requires knowing the version number. 2179 */ 2180 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2181 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); 2182 spa_config_exit(spa, SCL_ALL, FTAG); 2183 2184 if (error != 0) 2185 return (error); 2186 2187 ASSERT(spa->spa_root_vdev == rvd); 2188 2189 if (type != SPA_IMPORT_ASSEMBLE) { 2190 ASSERT(spa_guid(spa) == pool_guid); 2191 } 2192 2193 /* 2194 * Try to open all vdevs, loading each label in the process. 2195 */ 2196 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2197 error = vdev_open(rvd); 2198 spa_config_exit(spa, SCL_ALL, FTAG); 2199 if (error != 0) 2200 return (error); 2201 2202 /* 2203 * We need to validate the vdev labels against the configuration that 2204 * we have in hand, which is dependent on the setting of mosconfig. If 2205 * mosconfig is true then we're validating the vdev labels based on 2206 * that config. Otherwise, we're validating against the cached config 2207 * (zpool.cache) that was read when we loaded the zfs module, and then 2208 * later we will recursively call spa_load() and validate against 2209 * the vdev config. 2210 * 2211 * If we're assembling a new pool that's been split off from an 2212 * existing pool, the labels haven't yet been updated so we skip 2213 * validation for now. 2214 */ 2215 if (type != SPA_IMPORT_ASSEMBLE) { 2216 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2217 error = vdev_validate(rvd, mosconfig); 2218 spa_config_exit(spa, SCL_ALL, FTAG); 2219 2220 if (error != 0) 2221 return (error); 2222 2223 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2224 return (SET_ERROR(ENXIO)); 2225 } 2226 2227 /* 2228 * Find the best uberblock. 2229 */ 2230 vdev_uberblock_load(rvd, ub, &label); 2231 2232 /* 2233 * If we weren't able to find a single valid uberblock, return failure. 2234 */ 2235 if (ub->ub_txg == 0) { 2236 nvlist_free(label); 2237 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2238 } 2239 2240 /* 2241 * If the pool has an unsupported version we can't open it. 2242 */ 2243 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2244 nvlist_free(label); 2245 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2246 } 2247 2248 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2249 nvlist_t *features; 2250 2251 /* 2252 * If we weren't able to find what's necessary for reading the 2253 * MOS in the label, return failure. 2254 */ 2255 if (label == NULL || nvlist_lookup_nvlist(label, 2256 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { 2257 nvlist_free(label); 2258 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2259 ENXIO)); 2260 } 2261 2262 /* 2263 * Update our in-core representation with the definitive values 2264 * from the label. 2265 */ 2266 nvlist_free(spa->spa_label_features); 2267 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2268 } 2269 2270 nvlist_free(label); 2271 2272 /* 2273 * Look through entries in the label nvlist's features_for_read. If 2274 * there is a feature listed there which we don't understand then we 2275 * cannot open a pool. 2276 */ 2277 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2278 nvlist_t *unsup_feat; 2279 2280 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2281 0); 2282 2283 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2284 NULL); nvp != NULL; 2285 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2286 if (!zfeature_is_supported(nvpair_name(nvp))) { 2287 VERIFY(nvlist_add_string(unsup_feat, 2288 nvpair_name(nvp), "") == 0); 2289 } 2290 } 2291 2292 if (!nvlist_empty(unsup_feat)) { 2293 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2294 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2295 nvlist_free(unsup_feat); 2296 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2297 ENOTSUP)); 2298 } 2299 2300 nvlist_free(unsup_feat); 2301 } 2302 2303 /* 2304 * If the vdev guid sum doesn't match the uberblock, we have an 2305 * incomplete configuration. We first check to see if the pool 2306 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). 2307 * If it is, defer the vdev_guid_sum check till later so we 2308 * can handle missing vdevs. 2309 */ 2310 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, 2311 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && 2312 rvd->vdev_guid_sum != ub->ub_guid_sum) 2313 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 2314 2315 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2316 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2317 spa_try_repair(spa, config); 2318 spa_config_exit(spa, SCL_ALL, FTAG); 2319 nvlist_free(spa->spa_config_splitting); 2320 spa->spa_config_splitting = NULL; 2321 } 2322 2323 /* 2324 * Initialize internal SPA structures. 2325 */ 2326 spa->spa_state = POOL_STATE_ACTIVE; 2327 spa->spa_ubsync = spa->spa_uberblock; 2328 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2329 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2330 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2331 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2332 spa->spa_claim_max_txg = spa->spa_first_txg; 2333 spa->spa_prev_software_version = ub->ub_software_version; 2334 2335 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2336 if (error) 2337 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2338 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2339 2340 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) 2341 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2342 2343 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 2344 boolean_t missing_feat_read = B_FALSE; 2345 nvlist_t *unsup_feat, *enabled_feat; 2346 2347 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 2348 &spa->spa_feat_for_read_obj) != 0) { 2349 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2350 } 2351 2352 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 2353 &spa->spa_feat_for_write_obj) != 0) { 2354 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2355 } 2356 2357 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 2358 &spa->spa_feat_desc_obj) != 0) { 2359 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2360 } 2361 2362 enabled_feat = fnvlist_alloc(); 2363 unsup_feat = fnvlist_alloc(); 2364 2365 if (!spa_features_check(spa, B_FALSE, 2366 unsup_feat, enabled_feat)) 2367 missing_feat_read = B_TRUE; 2368 2369 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { 2370 if (!spa_features_check(spa, B_TRUE, 2371 unsup_feat, enabled_feat)) { 2372 missing_feat_write = B_TRUE; 2373 } 2374 } 2375 2376 fnvlist_add_nvlist(spa->spa_load_info, 2377 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 2378 2379 if (!nvlist_empty(unsup_feat)) { 2380 fnvlist_add_nvlist(spa->spa_load_info, 2381 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 2382 } 2383 2384 fnvlist_free(enabled_feat); 2385 fnvlist_free(unsup_feat); 2386 2387 if (!missing_feat_read) { 2388 fnvlist_add_boolean(spa->spa_load_info, 2389 ZPOOL_CONFIG_CAN_RDONLY); 2390 } 2391 2392 /* 2393 * If the state is SPA_LOAD_TRYIMPORT, our objective is 2394 * twofold: to determine whether the pool is available for 2395 * import in read-write mode and (if it is not) whether the 2396 * pool is available for import in read-only mode. If the pool 2397 * is available for import in read-write mode, it is displayed 2398 * as available in userland; if it is not available for import 2399 * in read-only mode, it is displayed as unavailable in 2400 * userland. If the pool is available for import in read-only 2401 * mode but not read-write mode, it is displayed as unavailable 2402 * in userland with a special note that the pool is actually 2403 * available for open in read-only mode. 2404 * 2405 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 2406 * missing a feature for write, we must first determine whether 2407 * the pool can be opened read-only before returning to 2408 * userland in order to know whether to display the 2409 * abovementioned note. 2410 */ 2411 if (missing_feat_read || (missing_feat_write && 2412 spa_writeable(spa))) { 2413 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2414 ENOTSUP)); 2415 } 2416 2417 /* 2418 * Load refcounts for ZFS features from disk into an in-memory 2419 * cache during SPA initialization. 2420 */ 2421 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 2422 uint64_t refcount; 2423 2424 error = feature_get_refcount_from_disk(spa, 2425 &spa_feature_table[i], &refcount); 2426 if (error == 0) { 2427 spa->spa_feat_refcount_cache[i] = refcount; 2428 } else if (error == ENOTSUP) { 2429 spa->spa_feat_refcount_cache[i] = 2430 SPA_FEATURE_DISABLED; 2431 } else { 2432 return (spa_vdev_err(rvd, 2433 VDEV_AUX_CORRUPT_DATA, EIO)); 2434 } 2435 } 2436 } 2437 2438 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { 2439 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, 2440 &spa->spa_feat_enabled_txg_obj) != 0) 2441 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2442 } 2443 2444 spa->spa_is_initializing = B_TRUE; 2445 error = dsl_pool_open(spa->spa_dsl_pool); 2446 spa->spa_is_initializing = B_FALSE; 2447 if (error != 0) 2448 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2449 2450 if (!mosconfig) { 2451 uint64_t hostid; 2452 nvlist_t *policy = NULL, *nvconfig; 2453 2454 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2455 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2456 2457 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, 2458 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2459 char *hostname; 2460 unsigned long myhostid = 0; 2461 2462 VERIFY(nvlist_lookup_string(nvconfig, 2463 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); 2464 2465#ifdef _KERNEL 2466 myhostid = zone_get_hostid(NULL); 2467#else /* _KERNEL */ 2468 /* 2469 * We're emulating the system's hostid in userland, so 2470 * we can't use zone_get_hostid(). 2471 */ 2472 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); 2473#endif /* _KERNEL */ 2474 if (check_hostid && hostid != 0 && myhostid != 0 && 2475 hostid != myhostid) { 2476 nvlist_free(nvconfig); 2477 cmn_err(CE_WARN, "pool '%s' could not be " 2478 "loaded as it was last accessed by " 2479 "another system (host: %s hostid: 0x%lx). " 2480 "See: http://illumos.org/msg/ZFS-8000-EY", 2481 spa_name(spa), hostname, 2482 (unsigned long)hostid); 2483 return (SET_ERROR(EBADF)); 2484 } 2485 } 2486 if (nvlist_lookup_nvlist(spa->spa_config, 2487 ZPOOL_REWIND_POLICY, &policy) == 0) 2488 VERIFY(nvlist_add_nvlist(nvconfig, 2489 ZPOOL_REWIND_POLICY, policy) == 0); 2490 2491 spa_config_set(spa, nvconfig); 2492 spa_unload(spa); 2493 spa_deactivate(spa); 2494 spa_activate(spa, orig_mode); 2495 2496 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); 2497 } 2498 2499 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) 2500 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2501 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 2502 if (error != 0) 2503 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2504 2505 /* 2506 * Load the bit that tells us to use the new accounting function 2507 * (raid-z deflation). If we have an older pool, this will not 2508 * be present. 2509 */ 2510 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); 2511 if (error != 0 && error != ENOENT) 2512 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2513 2514 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 2515 &spa->spa_creation_version); 2516 if (error != 0 && error != ENOENT) 2517 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2518 2519 /* 2520 * Load the persistent error log. If we have an older pool, this will 2521 * not be present. 2522 */ 2523 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); 2524 if (error != 0 && error != ENOENT) 2525 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2526 2527 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 2528 &spa->spa_errlog_scrub); 2529 if (error != 0 && error != ENOENT) 2530 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2531 2532 /* 2533 * Load the history object. If we have an older pool, this 2534 * will not be present. 2535 */ 2536 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); 2537 if (error != 0 && error != ENOENT) 2538 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2539 2540 /* 2541 * If we're assembling the pool from the split-off vdevs of 2542 * an existing pool, we don't want to attach the spares & cache 2543 * devices. 2544 */ 2545 2546 /* 2547 * Load any hot spares for this pool. 2548 */ 2549 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); 2550 if (error != 0 && error != ENOENT) 2551 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2552 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2553 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 2554 if (load_nvlist(spa, spa->spa_spares.sav_object, 2555 &spa->spa_spares.sav_config) != 0) 2556 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2557 2558 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2559 spa_load_spares(spa); 2560 spa_config_exit(spa, SCL_ALL, FTAG); 2561 } else if (error == 0) { 2562 spa->spa_spares.sav_sync = B_TRUE; 2563 } 2564 2565 /* 2566 * Load any level 2 ARC devices for this pool. 2567 */ 2568 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 2569 &spa->spa_l2cache.sav_object); 2570 if (error != 0 && error != ENOENT) 2571 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2572 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2573 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 2574 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 2575 &spa->spa_l2cache.sav_config) != 0) 2576 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2577 2578 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2579 spa_load_l2cache(spa); 2580 spa_config_exit(spa, SCL_ALL, FTAG); 2581 } else if (error == 0) { 2582 spa->spa_l2cache.sav_sync = B_TRUE; 2583 } 2584 2585 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 2586 2587 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); 2588 if (error && error != ENOENT) 2589 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2590 2591 if (error == 0) { 2592 uint64_t autoreplace; 2593 2594 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 2595 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 2596 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 2597 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 2598 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 2599 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 2600 &spa->spa_dedup_ditto); 2601 2602 spa->spa_autoreplace = (autoreplace != 0); 2603 } 2604 2605 /* 2606 * If the 'autoreplace' property is set, then post a resource notifying 2607 * the ZFS DE that it should not issue any faults for unopenable 2608 * devices. We also iterate over the vdevs, and post a sysevent for any 2609 * unopenable vdevs so that the normal autoreplace handler can take 2610 * over. 2611 */ 2612 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { 2613 spa_check_removed(spa->spa_root_vdev); 2614 /* 2615 * For the import case, this is done in spa_import(), because 2616 * at this point we're using the spare definitions from 2617 * the MOS config, not necessarily from the userland config. 2618 */ 2619 if (state != SPA_LOAD_IMPORT) { 2620 spa_aux_check_removed(&spa->spa_spares); 2621 spa_aux_check_removed(&spa->spa_l2cache); 2622 } 2623 } 2624 2625 /* 2626 * Load the vdev state for all toplevel vdevs. 2627 */ 2628 vdev_load(rvd); 2629 2630 /* 2631 * Propagate the leaf DTLs we just loaded all the way up the tree. 2632 */ 2633 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2634 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 2635 spa_config_exit(spa, SCL_ALL, FTAG); 2636 2637 /* 2638 * Load the DDTs (dedup tables). 2639 */ 2640 error = ddt_load(spa); 2641 if (error != 0) 2642 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2643 2644 spa_update_dspace(spa); 2645 2646 /* 2647 * Validate the config, using the MOS config to fill in any 2648 * information which might be missing. If we fail to validate 2649 * the config then declare the pool unfit for use. If we're 2650 * assembling a pool from a split, the log is not transferred 2651 * over. 2652 */ 2653 if (type != SPA_IMPORT_ASSEMBLE) { 2654 nvlist_t *nvconfig; 2655 2656 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2657 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2658 2659 if (!spa_config_valid(spa, nvconfig)) { 2660 nvlist_free(nvconfig); 2661 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 2662 ENXIO)); 2663 } 2664 nvlist_free(nvconfig); 2665 2666 /* 2667 * Now that we've validated the config, check the state of the 2668 * root vdev. If it can't be opened, it indicates one or 2669 * more toplevel vdevs are faulted. 2670 */ 2671 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2672 return (SET_ERROR(ENXIO)); 2673 2674 if (spa_check_logs(spa)) { 2675 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 2676 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); 2677 } 2678 } 2679 2680 if (missing_feat_write) { 2681 ASSERT(state == SPA_LOAD_TRYIMPORT); 2682 2683 /* 2684 * At this point, we know that we can open the pool in 2685 * read-only mode but not read-write mode. We now have enough 2686 * information and can return to userland. 2687 */ 2688 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); 2689 } 2690 2691 /* 2692 * We've successfully opened the pool, verify that we're ready 2693 * to start pushing transactions. 2694 */ 2695 if (state != SPA_LOAD_TRYIMPORT) { 2696 if (error = spa_load_verify(spa)) 2697 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2698 error)); 2699 } 2700 2701 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || 2702 spa->spa_load_max_txg == UINT64_MAX)) { 2703 dmu_tx_t *tx; 2704 int need_update = B_FALSE; 2705 2706 ASSERT(state != SPA_LOAD_TRYIMPORT); 2707 2708 /* 2709 * Claim log blocks that haven't been committed yet. 2710 * This must all happen in a single txg. 2711 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 2712 * invoked from zil_claim_log_block()'s i/o done callback. 2713 * Price of rollback is that we abandon the log. 2714 */ 2715 spa->spa_claiming = B_TRUE; 2716 2717 tx = dmu_tx_create_assigned(spa_get_dsl(spa), 2718 spa_first_txg(spa)); 2719 (void) dmu_objset_find(spa_name(spa), 2720 zil_claim, tx, DS_FIND_CHILDREN); 2721 dmu_tx_commit(tx); 2722 2723 spa->spa_claiming = B_FALSE; 2724 2725 spa_set_log_state(spa, SPA_LOG_GOOD); 2726 spa->spa_sync_on = B_TRUE; 2727 txg_sync_start(spa->spa_dsl_pool); 2728 2729 /* 2730 * Wait for all claims to sync. We sync up to the highest 2731 * claimed log block birth time so that claimed log blocks 2732 * don't appear to be from the future. spa_claim_max_txg 2733 * will have been set for us by either zil_check_log_chain() 2734 * (invoked from spa_check_logs()) or zil_claim() above. 2735 */ 2736 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 2737 2738 /* 2739 * If the config cache is stale, or we have uninitialized 2740 * metaslabs (see spa_vdev_add()), then update the config. 2741 * 2742 * If this is a verbatim import, trust the current 2743 * in-core spa_config and update the disk labels. 2744 */ 2745 if (config_cache_txg != spa->spa_config_txg || 2746 state == SPA_LOAD_IMPORT || 2747 state == SPA_LOAD_RECOVER || 2748 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 2749 need_update = B_TRUE; 2750 2751 for (int c = 0; c < rvd->vdev_children; c++) 2752 if (rvd->vdev_child[c]->vdev_ms_array == 0) 2753 need_update = B_TRUE; 2754 2755 /* 2756 * Update the config cache asychronously in case we're the 2757 * root pool, in which case the config cache isn't writable yet. 2758 */ 2759 if (need_update) 2760 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2761 2762 /* 2763 * Check all DTLs to see if anything needs resilvering. 2764 */ 2765 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 2766 vdev_resilver_needed(rvd, NULL, NULL)) 2767 spa_async_request(spa, SPA_ASYNC_RESILVER); 2768 2769 /* 2770 * Log the fact that we booted up (so that we can detect if 2771 * we rebooted in the middle of an operation). 2772 */ 2773 spa_history_log_version(spa, "open"); 2774 2775 /* 2776 * Delete any inconsistent datasets. 2777 */ 2778 (void) dmu_objset_find(spa_name(spa), 2779 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 2780 2781 /* 2782 * Clean up any stale temporary dataset userrefs. 2783 */ 2784 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 2785 } 2786 2787 return (0); 2788} 2789 2790static int 2791spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) 2792{ 2793 int mode = spa->spa_mode; 2794 2795 spa_unload(spa); 2796 spa_deactivate(spa); 2797 2798 spa->spa_load_max_txg--; 2799 2800 spa_activate(spa, mode); 2801 spa_async_suspend(spa); 2802 2803 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); 2804} 2805 2806/* 2807 * If spa_load() fails this function will try loading prior txg's. If 2808 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 2809 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 2810 * function will not rewind the pool and will return the same error as 2811 * spa_load(). 2812 */ 2813static int 2814spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, 2815 uint64_t max_request, int rewind_flags) 2816{ 2817 nvlist_t *loadinfo = NULL; 2818 nvlist_t *config = NULL; 2819 int load_error, rewind_error; 2820 uint64_t safe_rewind_txg; 2821 uint64_t min_txg; 2822 2823 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 2824 spa->spa_load_max_txg = spa->spa_load_txg; 2825 spa_set_log_state(spa, SPA_LOG_CLEAR); 2826 } else { 2827 spa->spa_load_max_txg = max_request; 2828 } 2829 2830 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, 2831 mosconfig); 2832 if (load_error == 0) 2833 return (0); 2834 2835 if (spa->spa_root_vdev != NULL) 2836 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2837 2838 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 2839 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 2840 2841 if (rewind_flags & ZPOOL_NEVER_REWIND) { 2842 nvlist_free(config); 2843 return (load_error); 2844 } 2845 2846 if (state == SPA_LOAD_RECOVER) { 2847 /* Price of rolling back is discarding txgs, including log */ 2848 spa_set_log_state(spa, SPA_LOG_CLEAR); 2849 } else { 2850 /* 2851 * If we aren't rolling back save the load info from our first 2852 * import attempt so that we can restore it after attempting 2853 * to rewind. 2854 */ 2855 loadinfo = spa->spa_load_info; 2856 spa->spa_load_info = fnvlist_alloc(); 2857 } 2858 2859 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 2860 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 2861 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 2862 TXG_INITIAL : safe_rewind_txg; 2863 2864 /* 2865 * Continue as long as we're finding errors, we're still within 2866 * the acceptable rewind range, and we're still finding uberblocks 2867 */ 2868 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 2869 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 2870 if (spa->spa_load_max_txg < safe_rewind_txg) 2871 spa->spa_extreme_rewind = B_TRUE; 2872 rewind_error = spa_load_retry(spa, state, mosconfig); 2873 } 2874 2875 spa->spa_extreme_rewind = B_FALSE; 2876 spa->spa_load_max_txg = UINT64_MAX; 2877 2878 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 2879 spa_config_set(spa, config); 2880 2881 if (state == SPA_LOAD_RECOVER) { 2882 ASSERT3P(loadinfo, ==, NULL); 2883 return (rewind_error); 2884 } else { 2885 /* Store the rewind info as part of the initial load info */ 2886 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 2887 spa->spa_load_info); 2888 2889 /* Restore the initial load info */ 2890 fnvlist_free(spa->spa_load_info); 2891 spa->spa_load_info = loadinfo; 2892 2893 return (load_error); 2894 } 2895} 2896 2897/* 2898 * Pool Open/Import 2899 * 2900 * The import case is identical to an open except that the configuration is sent 2901 * down from userland, instead of grabbed from the configuration cache. For the 2902 * case of an open, the pool configuration will exist in the 2903 * POOL_STATE_UNINITIALIZED state. 2904 * 2905 * The stats information (gen/count/ustats) is used to gather vdev statistics at 2906 * the same time open the pool, without having to keep around the spa_t in some 2907 * ambiguous state. 2908 */ 2909static int 2910spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 2911 nvlist_t **config) 2912{ 2913 spa_t *spa; 2914 spa_load_state_t state = SPA_LOAD_OPEN; 2915 int error; 2916 int locked = B_FALSE; 2917 int firstopen = B_FALSE; 2918 2919 *spapp = NULL; 2920 2921 /* 2922 * As disgusting as this is, we need to support recursive calls to this 2923 * function because dsl_dir_open() is called during spa_load(), and ends 2924 * up calling spa_open() again. The real fix is to figure out how to 2925 * avoid dsl_dir_open() calling this in the first place. 2926 */ 2927 if (mutex_owner(&spa_namespace_lock) != curthread) { 2928 mutex_enter(&spa_namespace_lock); 2929 locked = B_TRUE; 2930 } 2931 2932 if ((spa = spa_lookup(pool)) == NULL) { 2933 if (locked) 2934 mutex_exit(&spa_namespace_lock); 2935 return (SET_ERROR(ENOENT)); 2936 } 2937 2938 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 2939 zpool_rewind_policy_t policy; 2940 2941 firstopen = B_TRUE; 2942 2943 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, 2944 &policy); 2945 if (policy.zrp_request & ZPOOL_DO_REWIND) 2946 state = SPA_LOAD_RECOVER; 2947 2948 spa_activate(spa, spa_mode_global); 2949 2950 if (state != SPA_LOAD_RECOVER) 2951 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 2952 2953 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, 2954 policy.zrp_request); 2955 2956 if (error == EBADF) { 2957 /* 2958 * If vdev_validate() returns failure (indicated by 2959 * EBADF), it indicates that one of the vdevs indicates 2960 * that the pool has been exported or destroyed. If 2961 * this is the case, the config cache is out of sync and 2962 * we should remove the pool from the namespace. 2963 */ 2964 spa_unload(spa); 2965 spa_deactivate(spa); 2966 spa_config_sync(spa, B_TRUE, B_TRUE); 2967 spa_remove(spa); 2968 if (locked) 2969 mutex_exit(&spa_namespace_lock); 2970 return (SET_ERROR(ENOENT)); 2971 } 2972 2973 if (error) { 2974 /* 2975 * We can't open the pool, but we still have useful 2976 * information: the state of each vdev after the 2977 * attempted vdev_open(). Return this to the user. 2978 */ 2979 if (config != NULL && spa->spa_config) { 2980 VERIFY(nvlist_dup(spa->spa_config, config, 2981 KM_SLEEP) == 0); 2982 VERIFY(nvlist_add_nvlist(*config, 2983 ZPOOL_CONFIG_LOAD_INFO, 2984 spa->spa_load_info) == 0); 2985 } 2986 spa_unload(spa); 2987 spa_deactivate(spa); 2988 spa->spa_last_open_failed = error; 2989 if (locked) 2990 mutex_exit(&spa_namespace_lock); 2991 *spapp = NULL; 2992 return (error); 2993 } 2994 } 2995 2996 spa_open_ref(spa, tag); 2997 2998 if (config != NULL) 2999 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 3000 3001 /* 3002 * If we've recovered the pool, pass back any information we 3003 * gathered while doing the load. 3004 */ 3005 if (state == SPA_LOAD_RECOVER) { 3006 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 3007 spa->spa_load_info) == 0); 3008 } 3009 3010 if (locked) { 3011 spa->spa_last_open_failed = 0; 3012 spa->spa_last_ubsync_txg = 0; 3013 spa->spa_load_txg = 0; 3014 mutex_exit(&spa_namespace_lock); 3015#ifdef __FreeBSD__ 3016#ifdef _KERNEL 3017 if (firstopen) 3018 zvol_create_minors(spa->spa_name); 3019#endif 3020#endif 3021 } 3022 3023 *spapp = spa; 3024 3025 return (0); 3026} 3027 3028int 3029spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 3030 nvlist_t **config) 3031{ 3032 return (spa_open_common(name, spapp, tag, policy, config)); 3033} 3034 3035int 3036spa_open(const char *name, spa_t **spapp, void *tag) 3037{ 3038 return (spa_open_common(name, spapp, tag, NULL, NULL)); 3039} 3040 3041/* 3042 * Lookup the given spa_t, incrementing the inject count in the process, 3043 * preventing it from being exported or destroyed. 3044 */ 3045spa_t * 3046spa_inject_addref(char *name) 3047{ 3048 spa_t *spa; 3049 3050 mutex_enter(&spa_namespace_lock); 3051 if ((spa = spa_lookup(name)) == NULL) { 3052 mutex_exit(&spa_namespace_lock); 3053 return (NULL); 3054 } 3055 spa->spa_inject_ref++; 3056 mutex_exit(&spa_namespace_lock); 3057 3058 return (spa); 3059} 3060 3061void 3062spa_inject_delref(spa_t *spa) 3063{ 3064 mutex_enter(&spa_namespace_lock); 3065 spa->spa_inject_ref--; 3066 mutex_exit(&spa_namespace_lock); 3067} 3068 3069/* 3070 * Add spares device information to the nvlist. 3071 */ 3072static void 3073spa_add_spares(spa_t *spa, nvlist_t *config) 3074{ 3075 nvlist_t **spares; 3076 uint_t i, nspares; 3077 nvlist_t *nvroot; 3078 uint64_t guid; 3079 vdev_stat_t *vs; 3080 uint_t vsc; 3081 uint64_t pool; 3082 3083 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3084 3085 if (spa->spa_spares.sav_count == 0) 3086 return; 3087 3088 VERIFY(nvlist_lookup_nvlist(config, 3089 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3090 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 3091 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3092 if (nspares != 0) { 3093 VERIFY(nvlist_add_nvlist_array(nvroot, 3094 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3095 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3096 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3097 3098 /* 3099 * Go through and find any spares which have since been 3100 * repurposed as an active spare. If this is the case, update 3101 * their status appropriately. 3102 */ 3103 for (i = 0; i < nspares; i++) { 3104 VERIFY(nvlist_lookup_uint64(spares[i], 3105 ZPOOL_CONFIG_GUID, &guid) == 0); 3106 if (spa_spare_exists(guid, &pool, NULL) && 3107 pool != 0ULL) { 3108 VERIFY(nvlist_lookup_uint64_array( 3109 spares[i], ZPOOL_CONFIG_VDEV_STATS, 3110 (uint64_t **)&vs, &vsc) == 0); 3111 vs->vs_state = VDEV_STATE_CANT_OPEN; 3112 vs->vs_aux = VDEV_AUX_SPARED; 3113 } 3114 } 3115 } 3116} 3117 3118/* 3119 * Add l2cache device information to the nvlist, including vdev stats. 3120 */ 3121static void 3122spa_add_l2cache(spa_t *spa, nvlist_t *config) 3123{ 3124 nvlist_t **l2cache; 3125 uint_t i, j, nl2cache; 3126 nvlist_t *nvroot; 3127 uint64_t guid; 3128 vdev_t *vd; 3129 vdev_stat_t *vs; 3130 uint_t vsc; 3131 3132 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3133 3134 if (spa->spa_l2cache.sav_count == 0) 3135 return; 3136 3137 VERIFY(nvlist_lookup_nvlist(config, 3138 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3139 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 3140 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3141 if (nl2cache != 0) { 3142 VERIFY(nvlist_add_nvlist_array(nvroot, 3143 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3144 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3145 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3146 3147 /* 3148 * Update level 2 cache device stats. 3149 */ 3150 3151 for (i = 0; i < nl2cache; i++) { 3152 VERIFY(nvlist_lookup_uint64(l2cache[i], 3153 ZPOOL_CONFIG_GUID, &guid) == 0); 3154 3155 vd = NULL; 3156 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 3157 if (guid == 3158 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 3159 vd = spa->spa_l2cache.sav_vdevs[j]; 3160 break; 3161 } 3162 } 3163 ASSERT(vd != NULL); 3164 3165 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 3166 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 3167 == 0); 3168 vdev_get_stats(vd, vs); 3169 } 3170 } 3171} 3172 3173static void 3174spa_add_feature_stats(spa_t *spa, nvlist_t *config) 3175{ 3176 nvlist_t *features; 3177 zap_cursor_t zc; 3178 zap_attribute_t za; 3179 3180 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3181 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3182 3183 /* We may be unable to read features if pool is suspended. */ 3184 if (spa_suspended(spa)) 3185 goto out; 3186 3187 if (spa->spa_feat_for_read_obj != 0) { 3188 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3189 spa->spa_feat_for_read_obj); 3190 zap_cursor_retrieve(&zc, &za) == 0; 3191 zap_cursor_advance(&zc)) { 3192 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3193 za.za_num_integers == 1); 3194 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3195 za.za_first_integer)); 3196 } 3197 zap_cursor_fini(&zc); 3198 } 3199 3200 if (spa->spa_feat_for_write_obj != 0) { 3201 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3202 spa->spa_feat_for_write_obj); 3203 zap_cursor_retrieve(&zc, &za) == 0; 3204 zap_cursor_advance(&zc)) { 3205 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3206 za.za_num_integers == 1); 3207 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3208 za.za_first_integer)); 3209 } 3210 zap_cursor_fini(&zc); 3211 } 3212 3213out: 3214 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 3215 features) == 0); 3216 nvlist_free(features); 3217} 3218 3219int 3220spa_get_stats(const char *name, nvlist_t **config, 3221 char *altroot, size_t buflen) 3222{ 3223 int error; 3224 spa_t *spa; 3225 3226 *config = NULL; 3227 error = spa_open_common(name, &spa, FTAG, NULL, config); 3228 3229 if (spa != NULL) { 3230 /* 3231 * This still leaves a window of inconsistency where the spares 3232 * or l2cache devices could change and the config would be 3233 * self-inconsistent. 3234 */ 3235 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3236 3237 if (*config != NULL) { 3238 uint64_t loadtimes[2]; 3239 3240 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 3241 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 3242 VERIFY(nvlist_add_uint64_array(*config, 3243 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 3244 3245 VERIFY(nvlist_add_uint64(*config, 3246 ZPOOL_CONFIG_ERRCOUNT, 3247 spa_get_errlog_size(spa)) == 0); 3248 3249 if (spa_suspended(spa)) 3250 VERIFY(nvlist_add_uint64(*config, 3251 ZPOOL_CONFIG_SUSPENDED, 3252 spa->spa_failmode) == 0); 3253 3254 spa_add_spares(spa, *config); 3255 spa_add_l2cache(spa, *config); 3256 spa_add_feature_stats(spa, *config); 3257 } 3258 } 3259 3260 /* 3261 * We want to get the alternate root even for faulted pools, so we cheat 3262 * and call spa_lookup() directly. 3263 */ 3264 if (altroot) { 3265 if (spa == NULL) { 3266 mutex_enter(&spa_namespace_lock); 3267 spa = spa_lookup(name); 3268 if (spa) 3269 spa_altroot(spa, altroot, buflen); 3270 else 3271 altroot[0] = '\0'; 3272 spa = NULL; 3273 mutex_exit(&spa_namespace_lock); 3274 } else { 3275 spa_altroot(spa, altroot, buflen); 3276 } 3277 } 3278 3279 if (spa != NULL) { 3280 spa_config_exit(spa, SCL_CONFIG, FTAG); 3281 spa_close(spa, FTAG); 3282 } 3283 3284 return (error); 3285} 3286 3287/* 3288 * Validate that the auxiliary device array is well formed. We must have an 3289 * array of nvlists, each which describes a valid leaf vdev. If this is an 3290 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 3291 * specified, as long as they are well-formed. 3292 */ 3293static int 3294spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 3295 spa_aux_vdev_t *sav, const char *config, uint64_t version, 3296 vdev_labeltype_t label) 3297{ 3298 nvlist_t **dev; 3299 uint_t i, ndev; 3300 vdev_t *vd; 3301 int error; 3302 3303 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3304 3305 /* 3306 * It's acceptable to have no devs specified. 3307 */ 3308 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 3309 return (0); 3310 3311 if (ndev == 0) 3312 return (SET_ERROR(EINVAL)); 3313 3314 /* 3315 * Make sure the pool is formatted with a version that supports this 3316 * device type. 3317 */ 3318 if (spa_version(spa) < version) 3319 return (SET_ERROR(ENOTSUP)); 3320 3321 /* 3322 * Set the pending device list so we correctly handle device in-use 3323 * checking. 3324 */ 3325 sav->sav_pending = dev; 3326 sav->sav_npending = ndev; 3327 3328 for (i = 0; i < ndev; i++) { 3329 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 3330 mode)) != 0) 3331 goto out; 3332 3333 if (!vd->vdev_ops->vdev_op_leaf) { 3334 vdev_free(vd); 3335 error = SET_ERROR(EINVAL); 3336 goto out; 3337 } 3338 3339 /* 3340 * The L2ARC currently only supports disk devices in 3341 * kernel context. For user-level testing, we allow it. 3342 */ 3343#ifdef _KERNEL 3344 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && 3345 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { 3346 error = SET_ERROR(ENOTBLK); 3347 vdev_free(vd); 3348 goto out; 3349 } 3350#endif 3351 vd->vdev_top = vd; 3352 3353 if ((error = vdev_open(vd)) == 0 && 3354 (error = vdev_label_init(vd, crtxg, label)) == 0) { 3355 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 3356 vd->vdev_guid) == 0); 3357 } 3358 3359 vdev_free(vd); 3360 3361 if (error && 3362 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 3363 goto out; 3364 else 3365 error = 0; 3366 } 3367 3368out: 3369 sav->sav_pending = NULL; 3370 sav->sav_npending = 0; 3371 return (error); 3372} 3373 3374static int 3375spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 3376{ 3377 int error; 3378 3379 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3380 3381 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3382 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 3383 VDEV_LABEL_SPARE)) != 0) { 3384 return (error); 3385 } 3386 3387 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3388 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 3389 VDEV_LABEL_L2CACHE)); 3390} 3391 3392static void 3393spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 3394 const char *config) 3395{ 3396 int i; 3397 3398 if (sav->sav_config != NULL) { 3399 nvlist_t **olddevs; 3400 uint_t oldndevs; 3401 nvlist_t **newdevs; 3402 3403 /* 3404 * Generate new dev list by concatentating with the 3405 * current dev list. 3406 */ 3407 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 3408 &olddevs, &oldndevs) == 0); 3409 3410 newdevs = kmem_alloc(sizeof (void *) * 3411 (ndevs + oldndevs), KM_SLEEP); 3412 for (i = 0; i < oldndevs; i++) 3413 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 3414 KM_SLEEP) == 0); 3415 for (i = 0; i < ndevs; i++) 3416 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 3417 KM_SLEEP) == 0); 3418 3419 VERIFY(nvlist_remove(sav->sav_config, config, 3420 DATA_TYPE_NVLIST_ARRAY) == 0); 3421 3422 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 3423 config, newdevs, ndevs + oldndevs) == 0); 3424 for (i = 0; i < oldndevs + ndevs; i++) 3425 nvlist_free(newdevs[i]); 3426 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 3427 } else { 3428 /* 3429 * Generate a new dev list. 3430 */ 3431 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 3432 KM_SLEEP) == 0); 3433 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 3434 devs, ndevs) == 0); 3435 } 3436} 3437 3438/* 3439 * Stop and drop level 2 ARC devices 3440 */ 3441void 3442spa_l2cache_drop(spa_t *spa) 3443{ 3444 vdev_t *vd; 3445 int i; 3446 spa_aux_vdev_t *sav = &spa->spa_l2cache; 3447 3448 for (i = 0; i < sav->sav_count; i++) { 3449 uint64_t pool; 3450 3451 vd = sav->sav_vdevs[i]; 3452 ASSERT(vd != NULL); 3453 3454 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 3455 pool != 0ULL && l2arc_vdev_present(vd)) 3456 l2arc_remove_vdev(vd); 3457 } 3458} 3459 3460/* 3461 * Pool Creation 3462 */ 3463int 3464spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 3465 nvlist_t *zplprops) 3466{ 3467 spa_t *spa; 3468 char *altroot = NULL; 3469 vdev_t *rvd; 3470 dsl_pool_t *dp; 3471 dmu_tx_t *tx; 3472 int error = 0; 3473 uint64_t txg = TXG_INITIAL; 3474 nvlist_t **spares, **l2cache; 3475 uint_t nspares, nl2cache; 3476 uint64_t version, obj; 3477 boolean_t has_features; 3478 3479 /* 3480 * If this pool already exists, return failure. 3481 */ 3482 mutex_enter(&spa_namespace_lock); 3483 if (spa_lookup(pool) != NULL) { 3484 mutex_exit(&spa_namespace_lock); 3485 return (SET_ERROR(EEXIST)); 3486 } 3487 3488 /* 3489 * Allocate a new spa_t structure. 3490 */ 3491 (void) nvlist_lookup_string(props, 3492 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3493 spa = spa_add(pool, NULL, altroot); 3494 spa_activate(spa, spa_mode_global); 3495 3496 if (props && (error = spa_prop_validate(spa, props))) { 3497 spa_deactivate(spa); 3498 spa_remove(spa); 3499 mutex_exit(&spa_namespace_lock); 3500 return (error); 3501 } 3502 3503 has_features = B_FALSE; 3504 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 3505 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 3506 if (zpool_prop_feature(nvpair_name(elem))) 3507 has_features = B_TRUE; 3508 } 3509 3510 if (has_features || nvlist_lookup_uint64(props, 3511 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 3512 version = SPA_VERSION; 3513 } 3514 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 3515 3516 spa->spa_first_txg = txg; 3517 spa->spa_uberblock.ub_txg = txg - 1; 3518 spa->spa_uberblock.ub_version = version; 3519 spa->spa_ubsync = spa->spa_uberblock; 3520 3521 /* 3522 * Create "The Godfather" zio to hold all async IOs 3523 */ 3524 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 3525 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 3526 3527 /* 3528 * Create the root vdev. 3529 */ 3530 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3531 3532 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 3533 3534 ASSERT(error != 0 || rvd != NULL); 3535 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 3536 3537 if (error == 0 && !zfs_allocatable_devs(nvroot)) 3538 error = SET_ERROR(EINVAL); 3539 3540 if (error == 0 && 3541 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 3542 (error = spa_validate_aux(spa, nvroot, txg, 3543 VDEV_ALLOC_ADD)) == 0) { 3544 for (int c = 0; c < rvd->vdev_children; c++) { 3545 vdev_ashift_optimize(rvd->vdev_child[c]); 3546 vdev_metaslab_set_size(rvd->vdev_child[c]); 3547 vdev_expand(rvd->vdev_child[c], txg); 3548 } 3549 } 3550 3551 spa_config_exit(spa, SCL_ALL, FTAG); 3552 3553 if (error != 0) { 3554 spa_unload(spa); 3555 spa_deactivate(spa); 3556 spa_remove(spa); 3557 mutex_exit(&spa_namespace_lock); 3558 return (error); 3559 } 3560 3561 /* 3562 * Get the list of spares, if specified. 3563 */ 3564 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3565 &spares, &nspares) == 0) { 3566 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 3567 KM_SLEEP) == 0); 3568 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3569 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3570 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3571 spa_load_spares(spa); 3572 spa_config_exit(spa, SCL_ALL, FTAG); 3573 spa->spa_spares.sav_sync = B_TRUE; 3574 } 3575 3576 /* 3577 * Get the list of level 2 cache devices, if specified. 3578 */ 3579 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3580 &l2cache, &nl2cache) == 0) { 3581 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3582 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3583 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3584 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3585 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3586 spa_load_l2cache(spa); 3587 spa_config_exit(spa, SCL_ALL, FTAG); 3588 spa->spa_l2cache.sav_sync = B_TRUE; 3589 } 3590 3591 spa->spa_is_initializing = B_TRUE; 3592 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); 3593 spa->spa_meta_objset = dp->dp_meta_objset; 3594 spa->spa_is_initializing = B_FALSE; 3595 3596 /* 3597 * Create DDTs (dedup tables). 3598 */ 3599 ddt_create(spa); 3600 3601 spa_update_dspace(spa); 3602 3603 tx = dmu_tx_create_assigned(dp, txg); 3604 3605 /* 3606 * Create the pool config object. 3607 */ 3608 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 3609 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 3610 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 3611 3612 if (zap_add(spa->spa_meta_objset, 3613 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 3614 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 3615 cmn_err(CE_PANIC, "failed to add pool config"); 3616 } 3617 3618 if (spa_version(spa) >= SPA_VERSION_FEATURES) 3619 spa_feature_create_zap_objects(spa, tx); 3620 3621 if (zap_add(spa->spa_meta_objset, 3622 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 3623 sizeof (uint64_t), 1, &version, tx) != 0) { 3624 cmn_err(CE_PANIC, "failed to add pool version"); 3625 } 3626 3627 /* Newly created pools with the right version are always deflated. */ 3628 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 3629 spa->spa_deflate = TRUE; 3630 if (zap_add(spa->spa_meta_objset, 3631 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 3632 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 3633 cmn_err(CE_PANIC, "failed to add deflate"); 3634 } 3635 } 3636 3637 /* 3638 * Create the deferred-free bpobj. Turn off compression 3639 * because sync-to-convergence takes longer if the blocksize 3640 * keeps changing. 3641 */ 3642 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 3643 dmu_object_set_compress(spa->spa_meta_objset, obj, 3644 ZIO_COMPRESS_OFF, tx); 3645 if (zap_add(spa->spa_meta_objset, 3646 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 3647 sizeof (uint64_t), 1, &obj, tx) != 0) { 3648 cmn_err(CE_PANIC, "failed to add bpobj"); 3649 } 3650 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 3651 spa->spa_meta_objset, obj)); 3652 3653 /* 3654 * Create the pool's history object. 3655 */ 3656 if (version >= SPA_VERSION_ZPOOL_HISTORY) 3657 spa_history_create_obj(spa, tx); 3658 3659 /* 3660 * Set pool properties. 3661 */ 3662 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 3663 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3664 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 3665 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 3666 3667 if (props != NULL) { 3668 spa_configfile_set(spa, props, B_FALSE); 3669 spa_sync_props(props, tx); 3670 } 3671 3672 dmu_tx_commit(tx); 3673 3674 spa->spa_sync_on = B_TRUE; 3675 txg_sync_start(spa->spa_dsl_pool); 3676 3677 /* 3678 * We explicitly wait for the first transaction to complete so that our 3679 * bean counters are appropriately updated. 3680 */ 3681 txg_wait_synced(spa->spa_dsl_pool, txg); 3682 3683 spa_config_sync(spa, B_FALSE, B_TRUE); 3684 3685 spa_history_log_version(spa, "create"); 3686 3687 spa->spa_minref = refcount_count(&spa->spa_refcount); 3688 3689 mutex_exit(&spa_namespace_lock); 3690 3691 return (0); 3692} 3693 3694#ifdef _KERNEL 3695#if defined(sun) 3696/* 3697 * Get the root pool information from the root disk, then import the root pool 3698 * during the system boot up time. 3699 */ 3700extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 3701 3702static nvlist_t * 3703spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 3704{ 3705 nvlist_t *config; 3706 nvlist_t *nvtop, *nvroot; 3707 uint64_t pgid; 3708 3709 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 3710 return (NULL); 3711 3712 /* 3713 * Add this top-level vdev to the child array. 3714 */ 3715 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3716 &nvtop) == 0); 3717 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3718 &pgid) == 0); 3719 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 3720 3721 /* 3722 * Put this pool's top-level vdevs into a root vdev. 3723 */ 3724 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3725 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3726 VDEV_TYPE_ROOT) == 0); 3727 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3728 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3729 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3730 &nvtop, 1) == 0); 3731 3732 /* 3733 * Replace the existing vdev_tree with the new root vdev in 3734 * this pool's configuration (remove the old, add the new). 3735 */ 3736 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3737 nvlist_free(nvroot); 3738 return (config); 3739} 3740 3741/* 3742 * Walk the vdev tree and see if we can find a device with "better" 3743 * configuration. A configuration is "better" if the label on that 3744 * device has a more recent txg. 3745 */ 3746static void 3747spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 3748{ 3749 for (int c = 0; c < vd->vdev_children; c++) 3750 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 3751 3752 if (vd->vdev_ops->vdev_op_leaf) { 3753 nvlist_t *label; 3754 uint64_t label_txg; 3755 3756 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 3757 &label) != 0) 3758 return; 3759 3760 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 3761 &label_txg) == 0); 3762 3763 /* 3764 * Do we have a better boot device? 3765 */ 3766 if (label_txg > *txg) { 3767 *txg = label_txg; 3768 *avd = vd; 3769 } 3770 nvlist_free(label); 3771 } 3772} 3773 3774/* 3775 * Import a root pool. 3776 * 3777 * For x86. devpath_list will consist of devid and/or physpath name of 3778 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 3779 * The GRUB "findroot" command will return the vdev we should boot. 3780 * 3781 * For Sparc, devpath_list consists the physpath name of the booting device 3782 * no matter the rootpool is a single device pool or a mirrored pool. 3783 * e.g. 3784 * "/pci@1f,0/ide@d/disk@0,0:a" 3785 */ 3786int 3787spa_import_rootpool(char *devpath, char *devid) 3788{ 3789 spa_t *spa; 3790 vdev_t *rvd, *bvd, *avd = NULL; 3791 nvlist_t *config, *nvtop; 3792 uint64_t guid, txg; 3793 char *pname; 3794 int error; 3795 3796 /* 3797 * Read the label from the boot device and generate a configuration. 3798 */ 3799 config = spa_generate_rootconf(devpath, devid, &guid); 3800#if defined(_OBP) && defined(_KERNEL) 3801 if (config == NULL) { 3802 if (strstr(devpath, "/iscsi/ssd") != NULL) { 3803 /* iscsi boot */ 3804 get_iscsi_bootpath_phy(devpath); 3805 config = spa_generate_rootconf(devpath, devid, &guid); 3806 } 3807 } 3808#endif 3809 if (config == NULL) { 3810 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 3811 devpath); 3812 return (SET_ERROR(EIO)); 3813 } 3814 3815 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 3816 &pname) == 0); 3817 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 3818 3819 mutex_enter(&spa_namespace_lock); 3820 if ((spa = spa_lookup(pname)) != NULL) { 3821 /* 3822 * Remove the existing root pool from the namespace so that we 3823 * can replace it with the correct config we just read in. 3824 */ 3825 spa_remove(spa); 3826 } 3827 3828 spa = spa_add(pname, config, NULL); 3829 spa->spa_is_root = B_TRUE; 3830 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 3831 3832 /* 3833 * Build up a vdev tree based on the boot device's label config. 3834 */ 3835 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3836 &nvtop) == 0); 3837 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3838 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 3839 VDEV_ALLOC_ROOTPOOL); 3840 spa_config_exit(spa, SCL_ALL, FTAG); 3841 if (error) { 3842 mutex_exit(&spa_namespace_lock); 3843 nvlist_free(config); 3844 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 3845 pname); 3846 return (error); 3847 } 3848 3849 /* 3850 * Get the boot vdev. 3851 */ 3852 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 3853 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 3854 (u_longlong_t)guid); 3855 error = SET_ERROR(ENOENT); 3856 goto out; 3857 } 3858 3859 /* 3860 * Determine if there is a better boot device. 3861 */ 3862 avd = bvd; 3863 spa_alt_rootvdev(rvd, &avd, &txg); 3864 if (avd != bvd) { 3865 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 3866 "try booting from '%s'", avd->vdev_path); 3867 error = SET_ERROR(EINVAL); 3868 goto out; 3869 } 3870 3871 /* 3872 * If the boot device is part of a spare vdev then ensure that 3873 * we're booting off the active spare. 3874 */ 3875 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 3876 !bvd->vdev_isspare) { 3877 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 3878 "try booting from '%s'", 3879 bvd->vdev_parent-> 3880 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 3881 error = SET_ERROR(EINVAL); 3882 goto out; 3883 } 3884 3885 error = 0; 3886out: 3887 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3888 vdev_free(rvd); 3889 spa_config_exit(spa, SCL_ALL, FTAG); 3890 mutex_exit(&spa_namespace_lock); 3891 3892 nvlist_free(config); 3893 return (error); 3894} 3895 3896#else 3897 3898extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs, 3899 uint64_t *count); 3900 3901static nvlist_t * 3902spa_generate_rootconf(const char *name) 3903{ 3904 nvlist_t **configs, **tops; 3905 nvlist_t *config; 3906 nvlist_t *best_cfg, *nvtop, *nvroot; 3907 uint64_t *holes; 3908 uint64_t best_txg; 3909 uint64_t nchildren; 3910 uint64_t pgid; 3911 uint64_t count; 3912 uint64_t i; 3913 uint_t nholes; 3914 3915 if (vdev_geom_read_pool_label(name, &configs, &count) != 0) 3916 return (NULL); 3917 3918 ASSERT3U(count, !=, 0); 3919 best_txg = 0; 3920 for (i = 0; i < count; i++) { 3921 uint64_t txg; 3922 3923 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG, 3924 &txg) == 0); 3925 if (txg > best_txg) { 3926 best_txg = txg; 3927 best_cfg = configs[i]; 3928 } 3929 } 3930 3931 /* 3932 * Multi-vdev root pool configuration discovery is not supported yet. 3933 */ 3934 nchildren = 1; 3935 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren); 3936 holes = NULL; 3937 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY, 3938 &holes, &nholes); 3939 3940 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP); 3941 for (i = 0; i < nchildren; i++) { 3942 if (i >= count) 3943 break; 3944 if (configs[i] == NULL) 3945 continue; 3946 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE, 3947 &nvtop) == 0); 3948 nvlist_dup(nvtop, &tops[i], KM_SLEEP); 3949 } 3950 for (i = 0; holes != NULL && i < nholes; i++) { 3951 if (i >= nchildren) 3952 continue; 3953 if (tops[holes[i]] != NULL) 3954 continue; 3955 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP); 3956 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE, 3957 VDEV_TYPE_HOLE) == 0); 3958 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, 3959 holes[i]) == 0); 3960 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 3961 0) == 0); 3962 } 3963 for (i = 0; i < nchildren; i++) { 3964 if (tops[i] != NULL) 3965 continue; 3966 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP); 3967 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE, 3968 VDEV_TYPE_MISSING) == 0); 3969 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, 3970 i) == 0); 3971 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 3972 0) == 0); 3973 } 3974 3975 /* 3976 * Create pool config based on the best vdev config. 3977 */ 3978 nvlist_dup(best_cfg, &config, KM_SLEEP); 3979 3980 /* 3981 * Put this pool's top-level vdevs into a root vdev. 3982 */ 3983 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3984 &pgid) == 0); 3985 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3986 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3987 VDEV_TYPE_ROOT) == 0); 3988 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3989 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3990 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3991 tops, nchildren) == 0); 3992 3993 /* 3994 * Replace the existing vdev_tree with the new root vdev in 3995 * this pool's configuration (remove the old, add the new). 3996 */ 3997 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3998 3999 /* 4000 * Drop vdev config elements that should not be present at pool level. 4001 */ 4002 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64); 4003 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64); 4004 4005 for (i = 0; i < count; i++) 4006 nvlist_free(configs[i]); 4007 kmem_free(configs, count * sizeof(void *)); 4008 for (i = 0; i < nchildren; i++) 4009 nvlist_free(tops[i]); 4010 kmem_free(tops, nchildren * sizeof(void *)); 4011 nvlist_free(nvroot); 4012 return (config); 4013} 4014 4015int 4016spa_import_rootpool(const char *name) 4017{ 4018 spa_t *spa; 4019 vdev_t *rvd, *bvd, *avd = NULL; 4020 nvlist_t *config, *nvtop; 4021 uint64_t txg; 4022 char *pname; 4023 int error; 4024 4025 /* 4026 * Read the label from the boot device and generate a configuration. 4027 */ 4028 config = spa_generate_rootconf(name); 4029 4030 mutex_enter(&spa_namespace_lock); 4031 if (config != NULL) { 4032 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 4033 &pname) == 0 && strcmp(name, pname) == 0); 4034 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) 4035 == 0); 4036 4037 if ((spa = spa_lookup(pname)) != NULL) { 4038 /* 4039 * Remove the existing root pool from the namespace so 4040 * that we can replace it with the correct config 4041 * we just read in. 4042 */ 4043 spa_remove(spa); 4044 } 4045 spa = spa_add(pname, config, NULL); 4046 4047 /* 4048 * Set spa_ubsync.ub_version as it can be used in vdev_alloc() 4049 * via spa_version(). 4050 */ 4051 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 4052 &spa->spa_ubsync.ub_version) != 0) 4053 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 4054 } else if ((spa = spa_lookup(name)) == NULL) { 4055 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'", 4056 name); 4057 return (EIO); 4058 } else { 4059 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0); 4060 } 4061 spa->spa_is_root = B_TRUE; 4062 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 4063 4064 /* 4065 * Build up a vdev tree based on the boot device's label config. 4066 */ 4067 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4068 &nvtop) == 0); 4069 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4070 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 4071 VDEV_ALLOC_ROOTPOOL); 4072 spa_config_exit(spa, SCL_ALL, FTAG); 4073 if (error) { 4074 mutex_exit(&spa_namespace_lock); 4075 nvlist_free(config); 4076 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 4077 pname); 4078 return (error); 4079 } 4080 4081 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4082 vdev_free(rvd); 4083 spa_config_exit(spa, SCL_ALL, FTAG); 4084 mutex_exit(&spa_namespace_lock); 4085 4086 nvlist_free(config); 4087 return (0); 4088} 4089 4090#endif /* sun */ 4091#endif 4092 4093/* 4094 * Import a non-root pool into the system. 4095 */ 4096int 4097spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 4098{ 4099 spa_t *spa; 4100 char *altroot = NULL; 4101 spa_load_state_t state = SPA_LOAD_IMPORT; 4102 zpool_rewind_policy_t policy; 4103 uint64_t mode = spa_mode_global; 4104 uint64_t readonly = B_FALSE; 4105 int error; 4106 nvlist_t *nvroot; 4107 nvlist_t **spares, **l2cache; 4108 uint_t nspares, nl2cache; 4109 4110 /* 4111 * If a pool with this name exists, return failure. 4112 */ 4113 mutex_enter(&spa_namespace_lock); 4114 if (spa_lookup(pool) != NULL) { 4115 mutex_exit(&spa_namespace_lock); 4116 return (SET_ERROR(EEXIST)); 4117 } 4118 4119 /* 4120 * Create and initialize the spa structure. 4121 */ 4122 (void) nvlist_lookup_string(props, 4123 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 4124 (void) nvlist_lookup_uint64(props, 4125 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 4126 if (readonly) 4127 mode = FREAD; 4128 spa = spa_add(pool, config, altroot); 4129 spa->spa_import_flags = flags; 4130 4131 /* 4132 * Verbatim import - Take a pool and insert it into the namespace 4133 * as if it had been loaded at boot. 4134 */ 4135 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 4136 if (props != NULL) 4137 spa_configfile_set(spa, props, B_FALSE); 4138 4139 spa_config_sync(spa, B_FALSE, B_TRUE); 4140 4141 mutex_exit(&spa_namespace_lock); 4142 return (0); 4143 } 4144 4145 spa_activate(spa, mode); 4146 4147 /* 4148 * Don't start async tasks until we know everything is healthy. 4149 */ 4150 spa_async_suspend(spa); 4151 4152 zpool_get_rewind_policy(config, &policy); 4153 if (policy.zrp_request & ZPOOL_DO_REWIND) 4154 state = SPA_LOAD_RECOVER; 4155 4156 /* 4157 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig 4158 * because the user-supplied config is actually the one to trust when 4159 * doing an import. 4160 */ 4161 if (state != SPA_LOAD_RECOVER) 4162 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 4163 4164 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, 4165 policy.zrp_request); 4166 4167 /* 4168 * Propagate anything learned while loading the pool and pass it 4169 * back to caller (i.e. rewind info, missing devices, etc). 4170 */ 4171 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4172 spa->spa_load_info) == 0); 4173 4174 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4175 /* 4176 * Toss any existing sparelist, as it doesn't have any validity 4177 * anymore, and conflicts with spa_has_spare(). 4178 */ 4179 if (spa->spa_spares.sav_config) { 4180 nvlist_free(spa->spa_spares.sav_config); 4181 spa->spa_spares.sav_config = NULL; 4182 spa_load_spares(spa); 4183 } 4184 if (spa->spa_l2cache.sav_config) { 4185 nvlist_free(spa->spa_l2cache.sav_config); 4186 spa->spa_l2cache.sav_config = NULL; 4187 spa_load_l2cache(spa); 4188 } 4189 4190 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4191 &nvroot) == 0); 4192 if (error == 0) 4193 error = spa_validate_aux(spa, nvroot, -1ULL, 4194 VDEV_ALLOC_SPARE); 4195 if (error == 0) 4196 error = spa_validate_aux(spa, nvroot, -1ULL, 4197 VDEV_ALLOC_L2CACHE); 4198 spa_config_exit(spa, SCL_ALL, FTAG); 4199 4200 if (props != NULL) 4201 spa_configfile_set(spa, props, B_FALSE); 4202 4203 if (error != 0 || (props && spa_writeable(spa) && 4204 (error = spa_prop_set(spa, props)))) { 4205 spa_unload(spa); 4206 spa_deactivate(spa); 4207 spa_remove(spa); 4208 mutex_exit(&spa_namespace_lock); 4209 return (error); 4210 } 4211 4212 spa_async_resume(spa); 4213 4214 /* 4215 * Override any spares and level 2 cache devices as specified by 4216 * the user, as these may have correct device names/devids, etc. 4217 */ 4218 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 4219 &spares, &nspares) == 0) { 4220 if (spa->spa_spares.sav_config) 4221 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 4222 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 4223 else 4224 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 4225 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4226 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 4227 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 4228 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4229 spa_load_spares(spa); 4230 spa_config_exit(spa, SCL_ALL, FTAG); 4231 spa->spa_spares.sav_sync = B_TRUE; 4232 } 4233 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 4234 &l2cache, &nl2cache) == 0) { 4235 if (spa->spa_l2cache.sav_config) 4236 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 4237 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 4238 else 4239 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 4240 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4241 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 4242 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 4243 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4244 spa_load_l2cache(spa); 4245 spa_config_exit(spa, SCL_ALL, FTAG); 4246 spa->spa_l2cache.sav_sync = B_TRUE; 4247 } 4248 4249 /* 4250 * Check for any removed devices. 4251 */ 4252 if (spa->spa_autoreplace) { 4253 spa_aux_check_removed(&spa->spa_spares); 4254 spa_aux_check_removed(&spa->spa_l2cache); 4255 } 4256 4257 if (spa_writeable(spa)) { 4258 /* 4259 * Update the config cache to include the newly-imported pool. 4260 */ 4261 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4262 } 4263 4264 /* 4265 * It's possible that the pool was expanded while it was exported. 4266 * We kick off an async task to handle this for us. 4267 */ 4268 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 4269 4270 mutex_exit(&spa_namespace_lock); 4271 spa_history_log_version(spa, "import"); 4272 4273#ifdef __FreeBSD__ 4274#ifdef _KERNEL 4275 zvol_create_minors(pool); 4276#endif 4277#endif 4278 return (0); 4279} 4280 4281nvlist_t * 4282spa_tryimport(nvlist_t *tryconfig) 4283{ 4284 nvlist_t *config = NULL; 4285 char *poolname; 4286 spa_t *spa; 4287 uint64_t state; 4288 int error; 4289 4290 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 4291 return (NULL); 4292 4293 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 4294 return (NULL); 4295 4296 /* 4297 * Create and initialize the spa structure. 4298 */ 4299 mutex_enter(&spa_namespace_lock); 4300 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 4301 spa_activate(spa, FREAD); 4302 4303 /* 4304 * Pass off the heavy lifting to spa_load(). 4305 * Pass TRUE for mosconfig because the user-supplied config 4306 * is actually the one to trust when doing an import. 4307 */ 4308 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); 4309 4310 /* 4311 * If 'tryconfig' was at least parsable, return the current config. 4312 */ 4313 if (spa->spa_root_vdev != NULL) { 4314 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4315 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 4316 poolname) == 0); 4317 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 4318 state) == 0); 4319 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 4320 spa->spa_uberblock.ub_timestamp) == 0); 4321 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4322 spa->spa_load_info) == 0); 4323 4324 /* 4325 * If the bootfs property exists on this pool then we 4326 * copy it out so that external consumers can tell which 4327 * pools are bootable. 4328 */ 4329 if ((!error || error == EEXIST) && spa->spa_bootfs) { 4330 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4331 4332 /* 4333 * We have to play games with the name since the 4334 * pool was opened as TRYIMPORT_NAME. 4335 */ 4336 if (dsl_dsobj_to_dsname(spa_name(spa), 4337 spa->spa_bootfs, tmpname) == 0) { 4338 char *cp; 4339 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4340 4341 cp = strchr(tmpname, '/'); 4342 if (cp == NULL) { 4343 (void) strlcpy(dsname, tmpname, 4344 MAXPATHLEN); 4345 } else { 4346 (void) snprintf(dsname, MAXPATHLEN, 4347 "%s/%s", poolname, ++cp); 4348 } 4349 VERIFY(nvlist_add_string(config, 4350 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 4351 kmem_free(dsname, MAXPATHLEN); 4352 } 4353 kmem_free(tmpname, MAXPATHLEN); 4354 } 4355 4356 /* 4357 * Add the list of hot spares and level 2 cache devices. 4358 */ 4359 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4360 spa_add_spares(spa, config); 4361 spa_add_l2cache(spa, config); 4362 spa_config_exit(spa, SCL_CONFIG, FTAG); 4363 } 4364 4365 spa_unload(spa); 4366 spa_deactivate(spa); 4367 spa_remove(spa); 4368 mutex_exit(&spa_namespace_lock); 4369 4370 return (config); 4371} 4372 4373/* 4374 * Pool export/destroy 4375 * 4376 * The act of destroying or exporting a pool is very simple. We make sure there 4377 * is no more pending I/O and any references to the pool are gone. Then, we 4378 * update the pool state and sync all the labels to disk, removing the 4379 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 4380 * we don't sync the labels or remove the configuration cache. 4381 */ 4382static int 4383spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 4384 boolean_t force, boolean_t hardforce) 4385{ 4386 spa_t *spa; 4387 4388 if (oldconfig) 4389 *oldconfig = NULL; 4390 4391 if (!(spa_mode_global & FWRITE)) 4392 return (SET_ERROR(EROFS)); 4393 4394 mutex_enter(&spa_namespace_lock); 4395 if ((spa = spa_lookup(pool)) == NULL) { 4396 mutex_exit(&spa_namespace_lock); 4397 return (SET_ERROR(ENOENT)); 4398 } 4399 4400 /* 4401 * Put a hold on the pool, drop the namespace lock, stop async tasks, 4402 * reacquire the namespace lock, and see if we can export. 4403 */ 4404 spa_open_ref(spa, FTAG); 4405 mutex_exit(&spa_namespace_lock); 4406 spa_async_suspend(spa); 4407 mutex_enter(&spa_namespace_lock); 4408 spa_close(spa, FTAG); 4409 4410 /* 4411 * The pool will be in core if it's openable, 4412 * in which case we can modify its state. 4413 */ 4414 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 4415 /* 4416 * Objsets may be open only because they're dirty, so we 4417 * have to force it to sync before checking spa_refcnt. 4418 */ 4419 txg_wait_synced(spa->spa_dsl_pool, 0); 4420 4421 /* 4422 * A pool cannot be exported or destroyed if there are active 4423 * references. If we are resetting a pool, allow references by 4424 * fault injection handlers. 4425 */ 4426 if (!spa_refcount_zero(spa) || 4427 (spa->spa_inject_ref != 0 && 4428 new_state != POOL_STATE_UNINITIALIZED)) { 4429 spa_async_resume(spa); 4430 mutex_exit(&spa_namespace_lock); 4431 return (SET_ERROR(EBUSY)); 4432 } 4433 4434 /* 4435 * A pool cannot be exported if it has an active shared spare. 4436 * This is to prevent other pools stealing the active spare 4437 * from an exported pool. At user's own will, such pool can 4438 * be forcedly exported. 4439 */ 4440 if (!force && new_state == POOL_STATE_EXPORTED && 4441 spa_has_active_shared_spare(spa)) { 4442 spa_async_resume(spa); 4443 mutex_exit(&spa_namespace_lock); 4444 return (SET_ERROR(EXDEV)); 4445 } 4446 4447 /* 4448 * We want this to be reflected on every label, 4449 * so mark them all dirty. spa_unload() will do the 4450 * final sync that pushes these changes out. 4451 */ 4452 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 4453 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4454 spa->spa_state = new_state; 4455 spa->spa_final_txg = spa_last_synced_txg(spa) + 4456 TXG_DEFER_SIZE + 1; 4457 vdev_config_dirty(spa->spa_root_vdev); 4458 spa_config_exit(spa, SCL_ALL, FTAG); 4459 } 4460 } 4461 4462 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY); 4463 4464 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 4465 spa_unload(spa); 4466 spa_deactivate(spa); 4467 } 4468 4469 if (oldconfig && spa->spa_config) 4470 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 4471 4472 if (new_state != POOL_STATE_UNINITIALIZED) { 4473 if (!hardforce) 4474 spa_config_sync(spa, B_TRUE, B_TRUE); 4475 spa_remove(spa); 4476 } 4477 mutex_exit(&spa_namespace_lock); 4478 4479 return (0); 4480} 4481 4482/* 4483 * Destroy a storage pool. 4484 */ 4485int 4486spa_destroy(char *pool) 4487{ 4488 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 4489 B_FALSE, B_FALSE)); 4490} 4491 4492/* 4493 * Export a storage pool. 4494 */ 4495int 4496spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 4497 boolean_t hardforce) 4498{ 4499 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 4500 force, hardforce)); 4501} 4502 4503/* 4504 * Similar to spa_export(), this unloads the spa_t without actually removing it 4505 * from the namespace in any way. 4506 */ 4507int 4508spa_reset(char *pool) 4509{ 4510 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 4511 B_FALSE, B_FALSE)); 4512} 4513 4514/* 4515 * ========================================================================== 4516 * Device manipulation 4517 * ========================================================================== 4518 */ 4519 4520/* 4521 * Add a device to a storage pool. 4522 */ 4523int 4524spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 4525{ 4526 uint64_t txg, id; 4527 int error; 4528 vdev_t *rvd = spa->spa_root_vdev; 4529 vdev_t *vd, *tvd; 4530 nvlist_t **spares, **l2cache; 4531 uint_t nspares, nl2cache; 4532 4533 ASSERT(spa_writeable(spa)); 4534 4535 txg = spa_vdev_enter(spa); 4536 4537 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 4538 VDEV_ALLOC_ADD)) != 0) 4539 return (spa_vdev_exit(spa, NULL, txg, error)); 4540 4541 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 4542 4543 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 4544 &nspares) != 0) 4545 nspares = 0; 4546 4547 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 4548 &nl2cache) != 0) 4549 nl2cache = 0; 4550 4551 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 4552 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 4553 4554 if (vd->vdev_children != 0 && 4555 (error = vdev_create(vd, txg, B_FALSE)) != 0) 4556 return (spa_vdev_exit(spa, vd, txg, error)); 4557 4558 /* 4559 * We must validate the spares and l2cache devices after checking the 4560 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 4561 */ 4562 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 4563 return (spa_vdev_exit(spa, vd, txg, error)); 4564 4565 /* 4566 * Transfer each new top-level vdev from vd to rvd. 4567 */ 4568 for (int c = 0; c < vd->vdev_children; c++) { 4569 4570 /* 4571 * Set the vdev id to the first hole, if one exists. 4572 */ 4573 for (id = 0; id < rvd->vdev_children; id++) { 4574 if (rvd->vdev_child[id]->vdev_ishole) { 4575 vdev_free(rvd->vdev_child[id]); 4576 break; 4577 } 4578 } 4579 tvd = vd->vdev_child[c]; 4580 vdev_remove_child(vd, tvd); 4581 tvd->vdev_id = id; 4582 vdev_add_child(rvd, tvd); 4583 vdev_config_dirty(tvd); 4584 } 4585 4586 if (nspares != 0) { 4587 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 4588 ZPOOL_CONFIG_SPARES); 4589 spa_load_spares(spa); 4590 spa->spa_spares.sav_sync = B_TRUE; 4591 } 4592 4593 if (nl2cache != 0) { 4594 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 4595 ZPOOL_CONFIG_L2CACHE); 4596 spa_load_l2cache(spa); 4597 spa->spa_l2cache.sav_sync = B_TRUE; 4598 } 4599 4600 /* 4601 * We have to be careful when adding new vdevs to an existing pool. 4602 * If other threads start allocating from these vdevs before we 4603 * sync the config cache, and we lose power, then upon reboot we may 4604 * fail to open the pool because there are DVAs that the config cache 4605 * can't translate. Therefore, we first add the vdevs without 4606 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 4607 * and then let spa_config_update() initialize the new metaslabs. 4608 * 4609 * spa_load() checks for added-but-not-initialized vdevs, so that 4610 * if we lose power at any point in this sequence, the remaining 4611 * steps will be completed the next time we load the pool. 4612 */ 4613 (void) spa_vdev_exit(spa, vd, txg, 0); 4614 4615 mutex_enter(&spa_namespace_lock); 4616 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4617 mutex_exit(&spa_namespace_lock); 4618 4619 return (0); 4620} 4621 4622/* 4623 * Attach a device to a mirror. The arguments are the path to any device 4624 * in the mirror, and the nvroot for the new device. If the path specifies 4625 * a device that is not mirrored, we automatically insert the mirror vdev. 4626 * 4627 * If 'replacing' is specified, the new device is intended to replace the 4628 * existing device; in this case the two devices are made into their own 4629 * mirror using the 'replacing' vdev, which is functionally identical to 4630 * the mirror vdev (it actually reuses all the same ops) but has a few 4631 * extra rules: you can't attach to it after it's been created, and upon 4632 * completion of resilvering, the first disk (the one being replaced) 4633 * is automatically detached. 4634 */ 4635int 4636spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 4637{ 4638 uint64_t txg, dtl_max_txg; 4639 vdev_t *rvd = spa->spa_root_vdev; 4640 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 4641 vdev_ops_t *pvops; 4642 char *oldvdpath, *newvdpath; 4643 int newvd_isspare; 4644 int error; 4645 4646 ASSERT(spa_writeable(spa)); 4647 4648 txg = spa_vdev_enter(spa); 4649 4650 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 4651 4652 if (oldvd == NULL) 4653 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4654 4655 if (!oldvd->vdev_ops->vdev_op_leaf) 4656 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4657 4658 pvd = oldvd->vdev_parent; 4659 4660 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 4661 VDEV_ALLOC_ATTACH)) != 0) 4662 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4663 4664 if (newrootvd->vdev_children != 1) 4665 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4666 4667 newvd = newrootvd->vdev_child[0]; 4668 4669 if (!newvd->vdev_ops->vdev_op_leaf) 4670 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4671 4672 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 4673 return (spa_vdev_exit(spa, newrootvd, txg, error)); 4674 4675 /* 4676 * Spares can't replace logs 4677 */ 4678 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 4679 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4680 4681 if (!replacing) { 4682 /* 4683 * For attach, the only allowable parent is a mirror or the root 4684 * vdev. 4685 */ 4686 if (pvd->vdev_ops != &vdev_mirror_ops && 4687 pvd->vdev_ops != &vdev_root_ops) 4688 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4689 4690 pvops = &vdev_mirror_ops; 4691 } else { 4692 /* 4693 * Active hot spares can only be replaced by inactive hot 4694 * spares. 4695 */ 4696 if (pvd->vdev_ops == &vdev_spare_ops && 4697 oldvd->vdev_isspare && 4698 !spa_has_spare(spa, newvd->vdev_guid)) 4699 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4700 4701 /* 4702 * If the source is a hot spare, and the parent isn't already a 4703 * spare, then we want to create a new hot spare. Otherwise, we 4704 * want to create a replacing vdev. The user is not allowed to 4705 * attach to a spared vdev child unless the 'isspare' state is 4706 * the same (spare replaces spare, non-spare replaces 4707 * non-spare). 4708 */ 4709 if (pvd->vdev_ops == &vdev_replacing_ops && 4710 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 4711 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4712 } else if (pvd->vdev_ops == &vdev_spare_ops && 4713 newvd->vdev_isspare != oldvd->vdev_isspare) { 4714 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4715 } 4716 4717 if (newvd->vdev_isspare) 4718 pvops = &vdev_spare_ops; 4719 else 4720 pvops = &vdev_replacing_ops; 4721 } 4722 4723 /* 4724 * Make sure the new device is big enough. 4725 */ 4726 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 4727 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 4728 4729 /* 4730 * The new device cannot have a higher alignment requirement 4731 * than the top-level vdev. 4732 */ 4733 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 4734 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 4735 4736 /* 4737 * If this is an in-place replacement, update oldvd's path and devid 4738 * to make it distinguishable from newvd, and unopenable from now on. 4739 */ 4740 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 4741 spa_strfree(oldvd->vdev_path); 4742 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 4743 KM_SLEEP); 4744 (void) sprintf(oldvd->vdev_path, "%s/%s", 4745 newvd->vdev_path, "old"); 4746 if (oldvd->vdev_devid != NULL) { 4747 spa_strfree(oldvd->vdev_devid); 4748 oldvd->vdev_devid = NULL; 4749 } 4750 } 4751 4752 /* mark the device being resilvered */ 4753 newvd->vdev_resilver_txg = txg; 4754 4755 /* 4756 * If the parent is not a mirror, or if we're replacing, insert the new 4757 * mirror/replacing/spare vdev above oldvd. 4758 */ 4759 if (pvd->vdev_ops != pvops) 4760 pvd = vdev_add_parent(oldvd, pvops); 4761 4762 ASSERT(pvd->vdev_top->vdev_parent == rvd); 4763 ASSERT(pvd->vdev_ops == pvops); 4764 ASSERT(oldvd->vdev_parent == pvd); 4765 4766 /* 4767 * Extract the new device from its root and add it to pvd. 4768 */ 4769 vdev_remove_child(newrootvd, newvd); 4770 newvd->vdev_id = pvd->vdev_children; 4771 newvd->vdev_crtxg = oldvd->vdev_crtxg; 4772 vdev_add_child(pvd, newvd); 4773 4774 tvd = newvd->vdev_top; 4775 ASSERT(pvd->vdev_top == tvd); 4776 ASSERT(tvd->vdev_parent == rvd); 4777 4778 vdev_config_dirty(tvd); 4779 4780 /* 4781 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 4782 * for any dmu_sync-ed blocks. It will propagate upward when 4783 * spa_vdev_exit() calls vdev_dtl_reassess(). 4784 */ 4785 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 4786 4787 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 4788 dtl_max_txg - TXG_INITIAL); 4789 4790 if (newvd->vdev_isspare) { 4791 spa_spare_activate(newvd); 4792 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE); 4793 } 4794 4795 oldvdpath = spa_strdup(oldvd->vdev_path); 4796 newvdpath = spa_strdup(newvd->vdev_path); 4797 newvd_isspare = newvd->vdev_isspare; 4798 4799 /* 4800 * Mark newvd's DTL dirty in this txg. 4801 */ 4802 vdev_dirty(tvd, VDD_DTL, newvd, txg); 4803 4804 /* 4805 * Schedule the resilver to restart in the future. We do this to 4806 * ensure that dmu_sync-ed blocks have been stitched into the 4807 * respective datasets. 4808 */ 4809 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); 4810 4811 /* 4812 * Commit the config 4813 */ 4814 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 4815 4816 spa_history_log_internal(spa, "vdev attach", NULL, 4817 "%s vdev=%s %s vdev=%s", 4818 replacing && newvd_isspare ? "spare in" : 4819 replacing ? "replace" : "attach", newvdpath, 4820 replacing ? "for" : "to", oldvdpath); 4821 4822 spa_strfree(oldvdpath); 4823 spa_strfree(newvdpath); 4824 4825 if (spa->spa_bootfs) 4826 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH); 4827 4828 return (0); 4829} 4830 4831/* 4832 * Detach a device from a mirror or replacing vdev. 4833 * 4834 * If 'replace_done' is specified, only detach if the parent 4835 * is a replacing vdev. 4836 */ 4837int 4838spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 4839{ 4840 uint64_t txg; 4841 int error; 4842 vdev_t *rvd = spa->spa_root_vdev; 4843 vdev_t *vd, *pvd, *cvd, *tvd; 4844 boolean_t unspare = B_FALSE; 4845 uint64_t unspare_guid = 0; 4846 char *vdpath; 4847 4848 ASSERT(spa_writeable(spa)); 4849 4850 txg = spa_vdev_enter(spa); 4851 4852 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 4853 4854 if (vd == NULL) 4855 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4856 4857 if (!vd->vdev_ops->vdev_op_leaf) 4858 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4859 4860 pvd = vd->vdev_parent; 4861 4862 /* 4863 * If the parent/child relationship is not as expected, don't do it. 4864 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 4865 * vdev that's replacing B with C. The user's intent in replacing 4866 * is to go from M(A,B) to M(A,C). If the user decides to cancel 4867 * the replace by detaching C, the expected behavior is to end up 4868 * M(A,B). But suppose that right after deciding to detach C, 4869 * the replacement of B completes. We would have M(A,C), and then 4870 * ask to detach C, which would leave us with just A -- not what 4871 * the user wanted. To prevent this, we make sure that the 4872 * parent/child relationship hasn't changed -- in this example, 4873 * that C's parent is still the replacing vdev R. 4874 */ 4875 if (pvd->vdev_guid != pguid && pguid != 0) 4876 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4877 4878 /* 4879 * Only 'replacing' or 'spare' vdevs can be replaced. 4880 */ 4881 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 4882 pvd->vdev_ops != &vdev_spare_ops) 4883 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4884 4885 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 4886 spa_version(spa) >= SPA_VERSION_SPARES); 4887 4888 /* 4889 * Only mirror, replacing, and spare vdevs support detach. 4890 */ 4891 if (pvd->vdev_ops != &vdev_replacing_ops && 4892 pvd->vdev_ops != &vdev_mirror_ops && 4893 pvd->vdev_ops != &vdev_spare_ops) 4894 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4895 4896 /* 4897 * If this device has the only valid copy of some data, 4898 * we cannot safely detach it. 4899 */ 4900 if (vdev_dtl_required(vd)) 4901 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4902 4903 ASSERT(pvd->vdev_children >= 2); 4904 4905 /* 4906 * If we are detaching the second disk from a replacing vdev, then 4907 * check to see if we changed the original vdev's path to have "/old" 4908 * at the end in spa_vdev_attach(). If so, undo that change now. 4909 */ 4910 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 4911 vd->vdev_path != NULL) { 4912 size_t len = strlen(vd->vdev_path); 4913 4914 for (int c = 0; c < pvd->vdev_children; c++) { 4915 cvd = pvd->vdev_child[c]; 4916 4917 if (cvd == vd || cvd->vdev_path == NULL) 4918 continue; 4919 4920 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 4921 strcmp(cvd->vdev_path + len, "/old") == 0) { 4922 spa_strfree(cvd->vdev_path); 4923 cvd->vdev_path = spa_strdup(vd->vdev_path); 4924 break; 4925 } 4926 } 4927 } 4928 4929 /* 4930 * If we are detaching the original disk from a spare, then it implies 4931 * that the spare should become a real disk, and be removed from the 4932 * active spare list for the pool. 4933 */ 4934 if (pvd->vdev_ops == &vdev_spare_ops && 4935 vd->vdev_id == 0 && 4936 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 4937 unspare = B_TRUE; 4938 4939 /* 4940 * Erase the disk labels so the disk can be used for other things. 4941 * This must be done after all other error cases are handled, 4942 * but before we disembowel vd (so we can still do I/O to it). 4943 * But if we can't do it, don't treat the error as fatal -- 4944 * it may be that the unwritability of the disk is the reason 4945 * it's being detached! 4946 */ 4947 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 4948 4949 /* 4950 * Remove vd from its parent and compact the parent's children. 4951 */ 4952 vdev_remove_child(pvd, vd); 4953 vdev_compact_children(pvd); 4954 4955 /* 4956 * Remember one of the remaining children so we can get tvd below. 4957 */ 4958 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 4959 4960 /* 4961 * If we need to remove the remaining child from the list of hot spares, 4962 * do it now, marking the vdev as no longer a spare in the process. 4963 * We must do this before vdev_remove_parent(), because that can 4964 * change the GUID if it creates a new toplevel GUID. For a similar 4965 * reason, we must remove the spare now, in the same txg as the detach; 4966 * otherwise someone could attach a new sibling, change the GUID, and 4967 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 4968 */ 4969 if (unspare) { 4970 ASSERT(cvd->vdev_isspare); 4971 spa_spare_remove(cvd); 4972 unspare_guid = cvd->vdev_guid; 4973 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 4974 cvd->vdev_unspare = B_TRUE; 4975 } 4976 4977 /* 4978 * If the parent mirror/replacing vdev only has one child, 4979 * the parent is no longer needed. Remove it from the tree. 4980 */ 4981 if (pvd->vdev_children == 1) { 4982 if (pvd->vdev_ops == &vdev_spare_ops) 4983 cvd->vdev_unspare = B_FALSE; 4984 vdev_remove_parent(cvd); 4985 } 4986 4987 4988 /* 4989 * We don't set tvd until now because the parent we just removed 4990 * may have been the previous top-level vdev. 4991 */ 4992 tvd = cvd->vdev_top; 4993 ASSERT(tvd->vdev_parent == rvd); 4994 4995 /* 4996 * Reevaluate the parent vdev state. 4997 */ 4998 vdev_propagate_state(cvd); 4999 5000 /* 5001 * If the 'autoexpand' property is set on the pool then automatically 5002 * try to expand the size of the pool. For example if the device we 5003 * just detached was smaller than the others, it may be possible to 5004 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 5005 * first so that we can obtain the updated sizes of the leaf vdevs. 5006 */ 5007 if (spa->spa_autoexpand) { 5008 vdev_reopen(tvd); 5009 vdev_expand(tvd, txg); 5010 } 5011 5012 vdev_config_dirty(tvd); 5013 5014 /* 5015 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 5016 * vd->vdev_detached is set and free vd's DTL object in syncing context. 5017 * But first make sure we're not on any *other* txg's DTL list, to 5018 * prevent vd from being accessed after it's freed. 5019 */ 5020 vdpath = spa_strdup(vd->vdev_path); 5021 for (int t = 0; t < TXG_SIZE; t++) 5022 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 5023 vd->vdev_detached = B_TRUE; 5024 vdev_dirty(tvd, VDD_DTL, vd, txg); 5025 5026 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE); 5027 5028 /* hang on to the spa before we release the lock */ 5029 spa_open_ref(spa, FTAG); 5030 5031 error = spa_vdev_exit(spa, vd, txg, 0); 5032 5033 spa_history_log_internal(spa, "detach", NULL, 5034 "vdev=%s", vdpath); 5035 spa_strfree(vdpath); 5036 5037 /* 5038 * If this was the removal of the original device in a hot spare vdev, 5039 * then we want to go through and remove the device from the hot spare 5040 * list of every other pool. 5041 */ 5042 if (unspare) { 5043 spa_t *altspa = NULL; 5044 5045 mutex_enter(&spa_namespace_lock); 5046 while ((altspa = spa_next(altspa)) != NULL) { 5047 if (altspa->spa_state != POOL_STATE_ACTIVE || 5048 altspa == spa) 5049 continue; 5050 5051 spa_open_ref(altspa, FTAG); 5052 mutex_exit(&spa_namespace_lock); 5053 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 5054 mutex_enter(&spa_namespace_lock); 5055 spa_close(altspa, FTAG); 5056 } 5057 mutex_exit(&spa_namespace_lock); 5058 5059 /* search the rest of the vdevs for spares to remove */ 5060 spa_vdev_resilver_done(spa); 5061 } 5062 5063 /* all done with the spa; OK to release */ 5064 mutex_enter(&spa_namespace_lock); 5065 spa_close(spa, FTAG); 5066 mutex_exit(&spa_namespace_lock); 5067 5068 return (error); 5069} 5070 5071/* 5072 * Split a set of devices from their mirrors, and create a new pool from them. 5073 */ 5074int 5075spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 5076 nvlist_t *props, boolean_t exp) 5077{ 5078 int error = 0; 5079 uint64_t txg, *glist; 5080 spa_t *newspa; 5081 uint_t c, children, lastlog; 5082 nvlist_t **child, *nvl, *tmp; 5083 dmu_tx_t *tx; 5084 char *altroot = NULL; 5085 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 5086 boolean_t activate_slog; 5087 5088 ASSERT(spa_writeable(spa)); 5089 5090 txg = spa_vdev_enter(spa); 5091 5092 /* clear the log and flush everything up to now */ 5093 activate_slog = spa_passivate_log(spa); 5094 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5095 error = spa_offline_log(spa); 5096 txg = spa_vdev_config_enter(spa); 5097 5098 if (activate_slog) 5099 spa_activate_log(spa); 5100 5101 if (error != 0) 5102 return (spa_vdev_exit(spa, NULL, txg, error)); 5103 5104 /* check new spa name before going any further */ 5105 if (spa_lookup(newname) != NULL) 5106 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 5107 5108 /* 5109 * scan through all the children to ensure they're all mirrors 5110 */ 5111 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 5112 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 5113 &children) != 0) 5114 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5115 5116 /* first, check to ensure we've got the right child count */ 5117 rvd = spa->spa_root_vdev; 5118 lastlog = 0; 5119 for (c = 0; c < rvd->vdev_children; c++) { 5120 vdev_t *vd = rvd->vdev_child[c]; 5121 5122 /* don't count the holes & logs as children */ 5123 if (vd->vdev_islog || vd->vdev_ishole) { 5124 if (lastlog == 0) 5125 lastlog = c; 5126 continue; 5127 } 5128 5129 lastlog = 0; 5130 } 5131 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 5132 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5133 5134 /* next, ensure no spare or cache devices are part of the split */ 5135 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 5136 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 5137 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5138 5139 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 5140 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 5141 5142 /* then, loop over each vdev and validate it */ 5143 for (c = 0; c < children; c++) { 5144 uint64_t is_hole = 0; 5145 5146 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 5147 &is_hole); 5148 5149 if (is_hole != 0) { 5150 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 5151 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 5152 continue; 5153 } else { 5154 error = SET_ERROR(EINVAL); 5155 break; 5156 } 5157 } 5158 5159 /* which disk is going to be split? */ 5160 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 5161 &glist[c]) != 0) { 5162 error = SET_ERROR(EINVAL); 5163 break; 5164 } 5165 5166 /* look it up in the spa */ 5167 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 5168 if (vml[c] == NULL) { 5169 error = SET_ERROR(ENODEV); 5170 break; 5171 } 5172 5173 /* make sure there's nothing stopping the split */ 5174 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 5175 vml[c]->vdev_islog || 5176 vml[c]->vdev_ishole || 5177 vml[c]->vdev_isspare || 5178 vml[c]->vdev_isl2cache || 5179 !vdev_writeable(vml[c]) || 5180 vml[c]->vdev_children != 0 || 5181 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 5182 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 5183 error = SET_ERROR(EINVAL); 5184 break; 5185 } 5186 5187 if (vdev_dtl_required(vml[c])) { 5188 error = SET_ERROR(EBUSY); 5189 break; 5190 } 5191 5192 /* we need certain info from the top level */ 5193 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 5194 vml[c]->vdev_top->vdev_ms_array) == 0); 5195 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 5196 vml[c]->vdev_top->vdev_ms_shift) == 0); 5197 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 5198 vml[c]->vdev_top->vdev_asize) == 0); 5199 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 5200 vml[c]->vdev_top->vdev_ashift) == 0); 5201 } 5202 5203 if (error != 0) { 5204 kmem_free(vml, children * sizeof (vdev_t *)); 5205 kmem_free(glist, children * sizeof (uint64_t)); 5206 return (spa_vdev_exit(spa, NULL, txg, error)); 5207 } 5208 5209 /* stop writers from using the disks */ 5210 for (c = 0; c < children; c++) { 5211 if (vml[c] != NULL) 5212 vml[c]->vdev_offline = B_TRUE; 5213 } 5214 vdev_reopen(spa->spa_root_vdev); 5215 5216 /* 5217 * Temporarily record the splitting vdevs in the spa config. This 5218 * will disappear once the config is regenerated. 5219 */ 5220 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5221 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 5222 glist, children) == 0); 5223 kmem_free(glist, children * sizeof (uint64_t)); 5224 5225 mutex_enter(&spa->spa_props_lock); 5226 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 5227 nvl) == 0); 5228 mutex_exit(&spa->spa_props_lock); 5229 spa->spa_config_splitting = nvl; 5230 vdev_config_dirty(spa->spa_root_vdev); 5231 5232 /* configure and create the new pool */ 5233 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 5234 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 5235 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 5236 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 5237 spa_version(spa)) == 0); 5238 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 5239 spa->spa_config_txg) == 0); 5240 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 5241 spa_generate_guid(NULL)) == 0); 5242 (void) nvlist_lookup_string(props, 5243 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5244 5245 /* add the new pool to the namespace */ 5246 newspa = spa_add(newname, config, altroot); 5247 newspa->spa_config_txg = spa->spa_config_txg; 5248 spa_set_log_state(newspa, SPA_LOG_CLEAR); 5249 5250 /* release the spa config lock, retaining the namespace lock */ 5251 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5252 5253 if (zio_injection_enabled) 5254 zio_handle_panic_injection(spa, FTAG, 1); 5255 5256 spa_activate(newspa, spa_mode_global); 5257 spa_async_suspend(newspa); 5258 5259#ifndef sun 5260 /* mark that we are creating new spa by splitting */ 5261 newspa->spa_splitting_newspa = B_TRUE; 5262#endif 5263 /* create the new pool from the disks of the original pool */ 5264 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); 5265#ifndef sun 5266 newspa->spa_splitting_newspa = B_FALSE; 5267#endif 5268 if (error) 5269 goto out; 5270 5271 /* if that worked, generate a real config for the new pool */ 5272 if (newspa->spa_root_vdev != NULL) { 5273 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 5274 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5275 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 5276 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 5277 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 5278 B_TRUE)); 5279 } 5280 5281 /* set the props */ 5282 if (props != NULL) { 5283 spa_configfile_set(newspa, props, B_FALSE); 5284 error = spa_prop_set(newspa, props); 5285 if (error) 5286 goto out; 5287 } 5288 5289 /* flush everything */ 5290 txg = spa_vdev_config_enter(newspa); 5291 vdev_config_dirty(newspa->spa_root_vdev); 5292 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 5293 5294 if (zio_injection_enabled) 5295 zio_handle_panic_injection(spa, FTAG, 2); 5296 5297 spa_async_resume(newspa); 5298 5299 /* finally, update the original pool's config */ 5300 txg = spa_vdev_config_enter(spa); 5301 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 5302 error = dmu_tx_assign(tx, TXG_WAIT); 5303 if (error != 0) 5304 dmu_tx_abort(tx); 5305 for (c = 0; c < children; c++) { 5306 if (vml[c] != NULL) { 5307 vdev_split(vml[c]); 5308 if (error == 0) 5309 spa_history_log_internal(spa, "detach", tx, 5310 "vdev=%s", vml[c]->vdev_path); 5311 vdev_free(vml[c]); 5312 } 5313 } 5314 vdev_config_dirty(spa->spa_root_vdev); 5315 spa->spa_config_splitting = NULL; 5316 nvlist_free(nvl); 5317 if (error == 0) 5318 dmu_tx_commit(tx); 5319 (void) spa_vdev_exit(spa, NULL, txg, 0); 5320 5321 if (zio_injection_enabled) 5322 zio_handle_panic_injection(spa, FTAG, 3); 5323 5324 /* split is complete; log a history record */ 5325 spa_history_log_internal(newspa, "split", NULL, 5326 "from pool %s", spa_name(spa)); 5327 5328 kmem_free(vml, children * sizeof (vdev_t *)); 5329 5330 /* if we're not going to mount the filesystems in userland, export */ 5331 if (exp) 5332 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 5333 B_FALSE, B_FALSE); 5334 5335 return (error); 5336 5337out: 5338 spa_unload(newspa); 5339 spa_deactivate(newspa); 5340 spa_remove(newspa); 5341 5342 txg = spa_vdev_config_enter(spa); 5343 5344 /* re-online all offlined disks */ 5345 for (c = 0; c < children; c++) { 5346 if (vml[c] != NULL) 5347 vml[c]->vdev_offline = B_FALSE; 5348 } 5349 vdev_reopen(spa->spa_root_vdev); 5350 5351 nvlist_free(spa->spa_config_splitting); 5352 spa->spa_config_splitting = NULL; 5353 (void) spa_vdev_exit(spa, NULL, txg, error); 5354 5355 kmem_free(vml, children * sizeof (vdev_t *)); 5356 return (error); 5357} 5358 5359static nvlist_t * 5360spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) 5361{ 5362 for (int i = 0; i < count; i++) { 5363 uint64_t guid; 5364 5365 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, 5366 &guid) == 0); 5367 5368 if (guid == target_guid) 5369 return (nvpp[i]); 5370 } 5371 5372 return (NULL); 5373} 5374 5375static void 5376spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, 5377 nvlist_t *dev_to_remove) 5378{ 5379 nvlist_t **newdev = NULL; 5380 5381 if (count > 1) 5382 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); 5383 5384 for (int i = 0, j = 0; i < count; i++) { 5385 if (dev[i] == dev_to_remove) 5386 continue; 5387 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); 5388 } 5389 5390 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); 5391 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); 5392 5393 for (int i = 0; i < count - 1; i++) 5394 nvlist_free(newdev[i]); 5395 5396 if (count > 1) 5397 kmem_free(newdev, (count - 1) * sizeof (void *)); 5398} 5399 5400/* 5401 * Evacuate the device. 5402 */ 5403static int 5404spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) 5405{ 5406 uint64_t txg; 5407 int error = 0; 5408 5409 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5410 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5411 ASSERT(vd == vd->vdev_top); 5412 5413 /* 5414 * Evacuate the device. We don't hold the config lock as writer 5415 * since we need to do I/O but we do keep the 5416 * spa_namespace_lock held. Once this completes the device 5417 * should no longer have any blocks allocated on it. 5418 */ 5419 if (vd->vdev_islog) { 5420 if (vd->vdev_stat.vs_alloc != 0) 5421 error = spa_offline_log(spa); 5422 } else { 5423 error = SET_ERROR(ENOTSUP); 5424 } 5425 5426 if (error) 5427 return (error); 5428 5429 /* 5430 * The evacuation succeeded. Remove any remaining MOS metadata 5431 * associated with this vdev, and wait for these changes to sync. 5432 */ 5433 ASSERT0(vd->vdev_stat.vs_alloc); 5434 txg = spa_vdev_config_enter(spa); 5435 vd->vdev_removing = B_TRUE; 5436 vdev_dirty_leaves(vd, VDD_DTL, txg); 5437 vdev_config_dirty(vd); 5438 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5439 5440 return (0); 5441} 5442 5443/* 5444 * Complete the removal by cleaning up the namespace. 5445 */ 5446static void 5447spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd) 5448{ 5449 vdev_t *rvd = spa->spa_root_vdev; 5450 uint64_t id = vd->vdev_id; 5451 boolean_t last_vdev = (id == (rvd->vdev_children - 1)); 5452 5453 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5454 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 5455 ASSERT(vd == vd->vdev_top); 5456 5457 /* 5458 * Only remove any devices which are empty. 5459 */ 5460 if (vd->vdev_stat.vs_alloc != 0) 5461 return; 5462 5463 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 5464 5465 if (list_link_active(&vd->vdev_state_dirty_node)) 5466 vdev_state_clean(vd); 5467 if (list_link_active(&vd->vdev_config_dirty_node)) 5468 vdev_config_clean(vd); 5469 5470 vdev_free(vd); 5471 5472 if (last_vdev) { 5473 vdev_compact_children(rvd); 5474 } else { 5475 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); 5476 vdev_add_child(rvd, vd); 5477 } 5478 vdev_config_dirty(rvd); 5479 5480 /* 5481 * Reassess the health of our root vdev. 5482 */ 5483 vdev_reopen(rvd); 5484} 5485 5486/* 5487 * Remove a device from the pool - 5488 * 5489 * Removing a device from the vdev namespace requires several steps 5490 * and can take a significant amount of time. As a result we use 5491 * the spa_vdev_config_[enter/exit] functions which allow us to 5492 * grab and release the spa_config_lock while still holding the namespace 5493 * lock. During each step the configuration is synced out. 5494 * 5495 * Currently, this supports removing only hot spares, slogs, and level 2 ARC 5496 * devices. 5497 */ 5498int 5499spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) 5500{ 5501 vdev_t *vd; 5502 metaslab_group_t *mg; 5503 nvlist_t **spares, **l2cache, *nv; 5504 uint64_t txg = 0; 5505 uint_t nspares, nl2cache; 5506 int error = 0; 5507 boolean_t locked = MUTEX_HELD(&spa_namespace_lock); 5508 5509 ASSERT(spa_writeable(spa)); 5510 5511 if (!locked) 5512 txg = spa_vdev_enter(spa); 5513 5514 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 5515 5516 if (spa->spa_spares.sav_vdevs != NULL && 5517 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 5518 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && 5519 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { 5520 /* 5521 * Only remove the hot spare if it's not currently in use 5522 * in this pool. 5523 */ 5524 if (vd == NULL || unspare) { 5525 spa_vdev_remove_aux(spa->spa_spares.sav_config, 5526 ZPOOL_CONFIG_SPARES, spares, nspares, nv); 5527 spa_load_spares(spa); 5528 spa->spa_spares.sav_sync = B_TRUE; 5529 } else { 5530 error = SET_ERROR(EBUSY); 5531 } 5532 } else if (spa->spa_l2cache.sav_vdevs != NULL && 5533 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 5534 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && 5535 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { 5536 /* 5537 * Cache devices can always be removed. 5538 */ 5539 spa_vdev_remove_aux(spa->spa_l2cache.sav_config, 5540 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); 5541 spa_load_l2cache(spa); 5542 spa->spa_l2cache.sav_sync = B_TRUE; 5543 } else if (vd != NULL && vd->vdev_islog) { 5544 ASSERT(!locked); 5545 ASSERT(vd == vd->vdev_top); 5546 5547 mg = vd->vdev_mg; 5548 5549 /* 5550 * Stop allocating from this vdev. 5551 */ 5552 metaslab_group_passivate(mg); 5553 5554 /* 5555 * Wait for the youngest allocations and frees to sync, 5556 * and then wait for the deferral of those frees to finish. 5557 */ 5558 spa_vdev_config_exit(spa, NULL, 5559 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); 5560 5561 /* 5562 * Attempt to evacuate the vdev. 5563 */ 5564 error = spa_vdev_remove_evacuate(spa, vd); 5565 5566 txg = spa_vdev_config_enter(spa); 5567 5568 /* 5569 * If we couldn't evacuate the vdev, unwind. 5570 */ 5571 if (error) { 5572 metaslab_group_activate(mg); 5573 return (spa_vdev_exit(spa, NULL, txg, error)); 5574 } 5575 5576 /* 5577 * Clean up the vdev namespace. 5578 */ 5579 spa_vdev_remove_from_namespace(spa, vd); 5580 5581 } else if (vd != NULL) { 5582 /* 5583 * Normal vdevs cannot be removed (yet). 5584 */ 5585 error = SET_ERROR(ENOTSUP); 5586 } else { 5587 /* 5588 * There is no vdev of any kind with the specified guid. 5589 */ 5590 error = SET_ERROR(ENOENT); 5591 } 5592 5593 if (!locked) 5594 return (spa_vdev_exit(spa, NULL, txg, error)); 5595 5596 return (error); 5597} 5598 5599/* 5600 * Find any device that's done replacing, or a vdev marked 'unspare' that's 5601 * currently spared, so we can detach it. 5602 */ 5603static vdev_t * 5604spa_vdev_resilver_done_hunt(vdev_t *vd) 5605{ 5606 vdev_t *newvd, *oldvd; 5607 5608 for (int c = 0; c < vd->vdev_children; c++) { 5609 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 5610 if (oldvd != NULL) 5611 return (oldvd); 5612 } 5613 5614 /* 5615 * Check for a completed replacement. We always consider the first 5616 * vdev in the list to be the oldest vdev, and the last one to be 5617 * the newest (see spa_vdev_attach() for how that works). In 5618 * the case where the newest vdev is faulted, we will not automatically 5619 * remove it after a resilver completes. This is OK as it will require 5620 * user intervention to determine which disk the admin wishes to keep. 5621 */ 5622 if (vd->vdev_ops == &vdev_replacing_ops) { 5623 ASSERT(vd->vdev_children > 1); 5624 5625 newvd = vd->vdev_child[vd->vdev_children - 1]; 5626 oldvd = vd->vdev_child[0]; 5627 5628 if (vdev_dtl_empty(newvd, DTL_MISSING) && 5629 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5630 !vdev_dtl_required(oldvd)) 5631 return (oldvd); 5632 } 5633 5634 /* 5635 * Check for a completed resilver with the 'unspare' flag set. 5636 */ 5637 if (vd->vdev_ops == &vdev_spare_ops) { 5638 vdev_t *first = vd->vdev_child[0]; 5639 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 5640 5641 if (last->vdev_unspare) { 5642 oldvd = first; 5643 newvd = last; 5644 } else if (first->vdev_unspare) { 5645 oldvd = last; 5646 newvd = first; 5647 } else { 5648 oldvd = NULL; 5649 } 5650 5651 if (oldvd != NULL && 5652 vdev_dtl_empty(newvd, DTL_MISSING) && 5653 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5654 !vdev_dtl_required(oldvd)) 5655 return (oldvd); 5656 5657 /* 5658 * If there are more than two spares attached to a disk, 5659 * and those spares are not required, then we want to 5660 * attempt to free them up now so that they can be used 5661 * by other pools. Once we're back down to a single 5662 * disk+spare, we stop removing them. 5663 */ 5664 if (vd->vdev_children > 2) { 5665 newvd = vd->vdev_child[1]; 5666 5667 if (newvd->vdev_isspare && last->vdev_isspare && 5668 vdev_dtl_empty(last, DTL_MISSING) && 5669 vdev_dtl_empty(last, DTL_OUTAGE) && 5670 !vdev_dtl_required(newvd)) 5671 return (newvd); 5672 } 5673 } 5674 5675 return (NULL); 5676} 5677 5678static void 5679spa_vdev_resilver_done(spa_t *spa) 5680{ 5681 vdev_t *vd, *pvd, *ppvd; 5682 uint64_t guid, sguid, pguid, ppguid; 5683 5684 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5685 5686 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 5687 pvd = vd->vdev_parent; 5688 ppvd = pvd->vdev_parent; 5689 guid = vd->vdev_guid; 5690 pguid = pvd->vdev_guid; 5691 ppguid = ppvd->vdev_guid; 5692 sguid = 0; 5693 /* 5694 * If we have just finished replacing a hot spared device, then 5695 * we need to detach the parent's first child (the original hot 5696 * spare) as well. 5697 */ 5698 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 5699 ppvd->vdev_children == 2) { 5700 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 5701 sguid = ppvd->vdev_child[1]->vdev_guid; 5702 } 5703 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); 5704 5705 spa_config_exit(spa, SCL_ALL, FTAG); 5706 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 5707 return; 5708 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 5709 return; 5710 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5711 } 5712 5713 spa_config_exit(spa, SCL_ALL, FTAG); 5714} 5715 5716/* 5717 * Update the stored path or FRU for this vdev. 5718 */ 5719int 5720spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 5721 boolean_t ispath) 5722{ 5723 vdev_t *vd; 5724 boolean_t sync = B_FALSE; 5725 5726 ASSERT(spa_writeable(spa)); 5727 5728 spa_vdev_state_enter(spa, SCL_ALL); 5729 5730 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 5731 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 5732 5733 if (!vd->vdev_ops->vdev_op_leaf) 5734 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 5735 5736 if (ispath) { 5737 if (strcmp(value, vd->vdev_path) != 0) { 5738 spa_strfree(vd->vdev_path); 5739 vd->vdev_path = spa_strdup(value); 5740 sync = B_TRUE; 5741 } 5742 } else { 5743 if (vd->vdev_fru == NULL) { 5744 vd->vdev_fru = spa_strdup(value); 5745 sync = B_TRUE; 5746 } else if (strcmp(value, vd->vdev_fru) != 0) { 5747 spa_strfree(vd->vdev_fru); 5748 vd->vdev_fru = spa_strdup(value); 5749 sync = B_TRUE; 5750 } 5751 } 5752 5753 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 5754} 5755 5756int 5757spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 5758{ 5759 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 5760} 5761 5762int 5763spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 5764{ 5765 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 5766} 5767 5768/* 5769 * ========================================================================== 5770 * SPA Scanning 5771 * ========================================================================== 5772 */ 5773 5774int 5775spa_scan_stop(spa_t *spa) 5776{ 5777 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5778 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 5779 return (SET_ERROR(EBUSY)); 5780 return (dsl_scan_cancel(spa->spa_dsl_pool)); 5781} 5782 5783int 5784spa_scan(spa_t *spa, pool_scan_func_t func) 5785{ 5786 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5787 5788 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 5789 return (SET_ERROR(ENOTSUP)); 5790 5791 /* 5792 * If a resilver was requested, but there is no DTL on a 5793 * writeable leaf device, we have nothing to do. 5794 */ 5795 if (func == POOL_SCAN_RESILVER && 5796 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 5797 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 5798 return (0); 5799 } 5800 5801 return (dsl_scan(spa->spa_dsl_pool, func)); 5802} 5803 5804/* 5805 * ========================================================================== 5806 * SPA async task processing 5807 * ========================================================================== 5808 */ 5809 5810static void 5811spa_async_remove(spa_t *spa, vdev_t *vd) 5812{ 5813 if (vd->vdev_remove_wanted) { 5814 vd->vdev_remove_wanted = B_FALSE; 5815 vd->vdev_delayed_close = B_FALSE; 5816 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 5817 5818 /* 5819 * We want to clear the stats, but we don't want to do a full 5820 * vdev_clear() as that will cause us to throw away 5821 * degraded/faulted state as well as attempt to reopen the 5822 * device, all of which is a waste. 5823 */ 5824 vd->vdev_stat.vs_read_errors = 0; 5825 vd->vdev_stat.vs_write_errors = 0; 5826 vd->vdev_stat.vs_checksum_errors = 0; 5827 5828 vdev_state_dirty(vd->vdev_top); 5829 } 5830 5831 for (int c = 0; c < vd->vdev_children; c++) 5832 spa_async_remove(spa, vd->vdev_child[c]); 5833} 5834 5835static void 5836spa_async_probe(spa_t *spa, vdev_t *vd) 5837{ 5838 if (vd->vdev_probe_wanted) { 5839 vd->vdev_probe_wanted = B_FALSE; 5840 vdev_reopen(vd); /* vdev_open() does the actual probe */ 5841 } 5842 5843 for (int c = 0; c < vd->vdev_children; c++) 5844 spa_async_probe(spa, vd->vdev_child[c]); 5845} 5846 5847static void 5848spa_async_autoexpand(spa_t *spa, vdev_t *vd) 5849{ 5850 sysevent_id_t eid; 5851 nvlist_t *attr; 5852 char *physpath; 5853 5854 if (!spa->spa_autoexpand) 5855 return; 5856 5857 for (int c = 0; c < vd->vdev_children; c++) { 5858 vdev_t *cvd = vd->vdev_child[c]; 5859 spa_async_autoexpand(spa, cvd); 5860 } 5861 5862 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 5863 return; 5864 5865 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 5866 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 5867 5868 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5869 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); 5870 5871 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, 5872 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP); 5873 5874 nvlist_free(attr); 5875 kmem_free(physpath, MAXPATHLEN); 5876} 5877 5878static void 5879spa_async_thread(void *arg) 5880{ 5881 spa_t *spa = arg; 5882 int tasks; 5883 5884 ASSERT(spa->spa_sync_on); 5885 5886 mutex_enter(&spa->spa_async_lock); 5887 tasks = spa->spa_async_tasks; 5888 spa->spa_async_tasks &= SPA_ASYNC_REMOVE; 5889 mutex_exit(&spa->spa_async_lock); 5890 5891 /* 5892 * See if the config needs to be updated. 5893 */ 5894 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 5895 uint64_t old_space, new_space; 5896 5897 mutex_enter(&spa_namespace_lock); 5898 old_space = metaslab_class_get_space(spa_normal_class(spa)); 5899 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5900 new_space = metaslab_class_get_space(spa_normal_class(spa)); 5901 mutex_exit(&spa_namespace_lock); 5902 5903 /* 5904 * If the pool grew as a result of the config update, 5905 * then log an internal history event. 5906 */ 5907 if (new_space != old_space) { 5908 spa_history_log_internal(spa, "vdev online", NULL, 5909 "pool '%s' size: %llu(+%llu)", 5910 spa_name(spa), new_space, new_space - old_space); 5911 } 5912 } 5913 5914 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 5915 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5916 spa_async_autoexpand(spa, spa->spa_root_vdev); 5917 spa_config_exit(spa, SCL_CONFIG, FTAG); 5918 } 5919 5920 /* 5921 * See if any devices need to be probed. 5922 */ 5923 if (tasks & SPA_ASYNC_PROBE) { 5924 spa_vdev_state_enter(spa, SCL_NONE); 5925 spa_async_probe(spa, spa->spa_root_vdev); 5926 (void) spa_vdev_state_exit(spa, NULL, 0); 5927 } 5928 5929 /* 5930 * If any devices are done replacing, detach them. 5931 */ 5932 if (tasks & SPA_ASYNC_RESILVER_DONE) 5933 spa_vdev_resilver_done(spa); 5934 5935 /* 5936 * Kick off a resilver. 5937 */ 5938 if (tasks & SPA_ASYNC_RESILVER) 5939 dsl_resilver_restart(spa->spa_dsl_pool, 0); 5940 5941 /* 5942 * Let the world know that we're done. 5943 */ 5944 mutex_enter(&spa->spa_async_lock); 5945 spa->spa_async_thread = NULL; 5946 cv_broadcast(&spa->spa_async_cv); 5947 mutex_exit(&spa->spa_async_lock); 5948 thread_exit(); 5949} 5950 5951static void 5952spa_async_thread_vd(void *arg) 5953{ 5954 spa_t *spa = arg; 5955 int tasks; 5956 5957 ASSERT(spa->spa_sync_on); 5958 5959 mutex_enter(&spa->spa_async_lock); 5960 tasks = spa->spa_async_tasks; 5961retry: 5962 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE; 5963 mutex_exit(&spa->spa_async_lock); 5964 5965 /* 5966 * See if any devices need to be marked REMOVED. 5967 */ 5968 if (tasks & SPA_ASYNC_REMOVE) { 5969 spa_vdev_state_enter(spa, SCL_NONE); 5970 spa_async_remove(spa, spa->spa_root_vdev); 5971 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 5972 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 5973 for (int i = 0; i < spa->spa_spares.sav_count; i++) 5974 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 5975 (void) spa_vdev_state_exit(spa, NULL, 0); 5976 } 5977 5978 /* 5979 * Let the world know that we're done. 5980 */ 5981 mutex_enter(&spa->spa_async_lock); 5982 tasks = spa->spa_async_tasks; 5983 if ((tasks & SPA_ASYNC_REMOVE) != 0) 5984 goto retry; 5985 spa->spa_async_thread_vd = NULL; 5986 cv_broadcast(&spa->spa_async_cv); 5987 mutex_exit(&spa->spa_async_lock); 5988 thread_exit(); 5989} 5990 5991void 5992spa_async_suspend(spa_t *spa) 5993{ 5994 mutex_enter(&spa->spa_async_lock); 5995 spa->spa_async_suspended++; 5996 while (spa->spa_async_thread != NULL && 5997 spa->spa_async_thread_vd != NULL) 5998 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 5999 mutex_exit(&spa->spa_async_lock); 6000} 6001 6002void 6003spa_async_resume(spa_t *spa) 6004{ 6005 mutex_enter(&spa->spa_async_lock); 6006 ASSERT(spa->spa_async_suspended != 0); 6007 spa->spa_async_suspended--; 6008 mutex_exit(&spa->spa_async_lock); 6009} 6010 6011static boolean_t 6012spa_async_tasks_pending(spa_t *spa) 6013{ 6014 uint_t non_config_tasks; 6015 uint_t config_task; 6016 boolean_t config_task_suspended; 6017 6018 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE | 6019 SPA_ASYNC_REMOVE); 6020 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; 6021 if (spa->spa_ccw_fail_time == 0) { 6022 config_task_suspended = B_FALSE; 6023 } else { 6024 config_task_suspended = 6025 (gethrtime() - spa->spa_ccw_fail_time) < 6026 (zfs_ccw_retry_interval * NANOSEC); 6027 } 6028 6029 return (non_config_tasks || (config_task && !config_task_suspended)); 6030} 6031 6032static void 6033spa_async_dispatch(spa_t *spa) 6034{ 6035 mutex_enter(&spa->spa_async_lock); 6036 if (spa_async_tasks_pending(spa) && 6037 !spa->spa_async_suspended && 6038 spa->spa_async_thread == NULL && 6039 rootdir != NULL) 6040 spa->spa_async_thread = thread_create(NULL, 0, 6041 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 6042 mutex_exit(&spa->spa_async_lock); 6043} 6044 6045static void 6046spa_async_dispatch_vd(spa_t *spa) 6047{ 6048 mutex_enter(&spa->spa_async_lock); 6049 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 && 6050 !spa->spa_async_suspended && 6051 spa->spa_async_thread_vd == NULL && 6052 rootdir != NULL) 6053 spa->spa_async_thread_vd = thread_create(NULL, 0, 6054 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri); 6055 mutex_exit(&spa->spa_async_lock); 6056} 6057 6058void 6059spa_async_request(spa_t *spa, int task) 6060{ 6061 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 6062 mutex_enter(&spa->spa_async_lock); 6063 spa->spa_async_tasks |= task; 6064 mutex_exit(&spa->spa_async_lock); 6065 spa_async_dispatch_vd(spa); 6066} 6067 6068/* 6069 * ========================================================================== 6070 * SPA syncing routines 6071 * ========================================================================== 6072 */ 6073 6074static int 6075bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6076{ 6077 bpobj_t *bpo = arg; 6078 bpobj_enqueue(bpo, bp, tx); 6079 return (0); 6080} 6081 6082static int 6083spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6084{ 6085 zio_t *zio = arg; 6086 6087 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 6088 BP_GET_PSIZE(bp), zio->io_flags)); 6089 return (0); 6090} 6091 6092/* 6093 * Note: this simple function is not inlined to make it easier to dtrace the 6094 * amount of time spent syncing frees. 6095 */ 6096static void 6097spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) 6098{ 6099 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6100 bplist_iterate(bpl, spa_free_sync_cb, zio, tx); 6101 VERIFY(zio_wait(zio) == 0); 6102} 6103 6104/* 6105 * Note: this simple function is not inlined to make it easier to dtrace the 6106 * amount of time spent syncing deferred frees. 6107 */ 6108static void 6109spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) 6110{ 6111 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6112 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, 6113 spa_free_sync_cb, zio, tx), ==, 0); 6114 VERIFY0(zio_wait(zio)); 6115} 6116 6117 6118static void 6119spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 6120{ 6121 char *packed = NULL; 6122 size_t bufsize; 6123 size_t nvsize = 0; 6124 dmu_buf_t *db; 6125 6126 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 6127 6128 /* 6129 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 6130 * information. This avoids the dmu_buf_will_dirty() path and 6131 * saves us a pre-read to get data we don't actually care about. 6132 */ 6133 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 6134 packed = kmem_alloc(bufsize, KM_SLEEP); 6135 6136 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 6137 KM_SLEEP) == 0); 6138 bzero(packed + nvsize, bufsize - nvsize); 6139 6140 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 6141 6142 kmem_free(packed, bufsize); 6143 6144 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 6145 dmu_buf_will_dirty(db, tx); 6146 *(uint64_t *)db->db_data = nvsize; 6147 dmu_buf_rele(db, FTAG); 6148} 6149 6150static void 6151spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 6152 const char *config, const char *entry) 6153{ 6154 nvlist_t *nvroot; 6155 nvlist_t **list; 6156 int i; 6157 6158 if (!sav->sav_sync) 6159 return; 6160 6161 /* 6162 * Update the MOS nvlist describing the list of available devices. 6163 * spa_validate_aux() will have already made sure this nvlist is 6164 * valid and the vdevs are labeled appropriately. 6165 */ 6166 if (sav->sav_object == 0) { 6167 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 6168 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 6169 sizeof (uint64_t), tx); 6170 VERIFY(zap_update(spa->spa_meta_objset, 6171 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 6172 &sav->sav_object, tx) == 0); 6173 } 6174 6175 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 6176 if (sav->sav_count == 0) { 6177 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 6178 } else { 6179 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 6180 for (i = 0; i < sav->sav_count; i++) 6181 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 6182 B_FALSE, VDEV_CONFIG_L2CACHE); 6183 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 6184 sav->sav_count) == 0); 6185 for (i = 0; i < sav->sav_count; i++) 6186 nvlist_free(list[i]); 6187 kmem_free(list, sav->sav_count * sizeof (void *)); 6188 } 6189 6190 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 6191 nvlist_free(nvroot); 6192 6193 sav->sav_sync = B_FALSE; 6194} 6195 6196static void 6197spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 6198{ 6199 nvlist_t *config; 6200 6201 if (list_is_empty(&spa->spa_config_dirty_list)) 6202 return; 6203 6204 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6205 6206 config = spa_config_generate(spa, spa->spa_root_vdev, 6207 dmu_tx_get_txg(tx), B_FALSE); 6208 6209 /* 6210 * If we're upgrading the spa version then make sure that 6211 * the config object gets updated with the correct version. 6212 */ 6213 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) 6214 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 6215 spa->spa_uberblock.ub_version); 6216 6217 spa_config_exit(spa, SCL_STATE, FTAG); 6218 6219 if (spa->spa_config_syncing) 6220 nvlist_free(spa->spa_config_syncing); 6221 spa->spa_config_syncing = config; 6222 6223 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 6224} 6225 6226static void 6227spa_sync_version(void *arg, dmu_tx_t *tx) 6228{ 6229 uint64_t *versionp = arg; 6230 uint64_t version = *versionp; 6231 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6232 6233 /* 6234 * Setting the version is special cased when first creating the pool. 6235 */ 6236 ASSERT(tx->tx_txg != TXG_INITIAL); 6237 6238 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 6239 ASSERT(version >= spa_version(spa)); 6240 6241 spa->spa_uberblock.ub_version = version; 6242 vdev_config_dirty(spa->spa_root_vdev); 6243 spa_history_log_internal(spa, "set", tx, "version=%lld", version); 6244} 6245 6246/* 6247 * Set zpool properties. 6248 */ 6249static void 6250spa_sync_props(void *arg, dmu_tx_t *tx) 6251{ 6252 nvlist_t *nvp = arg; 6253 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6254 objset_t *mos = spa->spa_meta_objset; 6255 nvpair_t *elem = NULL; 6256 6257 mutex_enter(&spa->spa_props_lock); 6258 6259 while ((elem = nvlist_next_nvpair(nvp, elem))) { 6260 uint64_t intval; 6261 char *strval, *fname; 6262 zpool_prop_t prop; 6263 const char *propname; 6264 zprop_type_t proptype; 6265 spa_feature_t fid; 6266 6267 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 6268 case ZPROP_INVAL: 6269 /* 6270 * We checked this earlier in spa_prop_validate(). 6271 */ 6272 ASSERT(zpool_prop_feature(nvpair_name(elem))); 6273 6274 fname = strchr(nvpair_name(elem), '@') + 1; 6275 VERIFY0(zfeature_lookup_name(fname, &fid)); 6276 6277 spa_feature_enable(spa, fid, tx); 6278 spa_history_log_internal(spa, "set", tx, 6279 "%s=enabled", nvpair_name(elem)); 6280 break; 6281 6282 case ZPOOL_PROP_VERSION: 6283 intval = fnvpair_value_uint64(elem); 6284 /* 6285 * The version is synced seperatly before other 6286 * properties and should be correct by now. 6287 */ 6288 ASSERT3U(spa_version(spa), >=, intval); 6289 break; 6290 6291 case ZPOOL_PROP_ALTROOT: 6292 /* 6293 * 'altroot' is a non-persistent property. It should 6294 * have been set temporarily at creation or import time. 6295 */ 6296 ASSERT(spa->spa_root != NULL); 6297 break; 6298 6299 case ZPOOL_PROP_READONLY: 6300 case ZPOOL_PROP_CACHEFILE: 6301 /* 6302 * 'readonly' and 'cachefile' are also non-persisitent 6303 * properties. 6304 */ 6305 break; 6306 case ZPOOL_PROP_COMMENT: 6307 strval = fnvpair_value_string(elem); 6308 if (spa->spa_comment != NULL) 6309 spa_strfree(spa->spa_comment); 6310 spa->spa_comment = spa_strdup(strval); 6311 /* 6312 * We need to dirty the configuration on all the vdevs 6313 * so that their labels get updated. It's unnecessary 6314 * to do this for pool creation since the vdev's 6315 * configuratoin has already been dirtied. 6316 */ 6317 if (tx->tx_txg != TXG_INITIAL) 6318 vdev_config_dirty(spa->spa_root_vdev); 6319 spa_history_log_internal(spa, "set", tx, 6320 "%s=%s", nvpair_name(elem), strval); 6321 break; 6322 default: 6323 /* 6324 * Set pool property values in the poolprops mos object. 6325 */ 6326 if (spa->spa_pool_props_object == 0) { 6327 spa->spa_pool_props_object = 6328 zap_create_link(mos, DMU_OT_POOL_PROPS, 6329 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 6330 tx); 6331 } 6332 6333 /* normalize the property name */ 6334 propname = zpool_prop_to_name(prop); 6335 proptype = zpool_prop_get_type(prop); 6336 6337 if (nvpair_type(elem) == DATA_TYPE_STRING) { 6338 ASSERT(proptype == PROP_TYPE_STRING); 6339 strval = fnvpair_value_string(elem); 6340 VERIFY0(zap_update(mos, 6341 spa->spa_pool_props_object, propname, 6342 1, strlen(strval) + 1, strval, tx)); 6343 spa_history_log_internal(spa, "set", tx, 6344 "%s=%s", nvpair_name(elem), strval); 6345 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 6346 intval = fnvpair_value_uint64(elem); 6347 6348 if (proptype == PROP_TYPE_INDEX) { 6349 const char *unused; 6350 VERIFY0(zpool_prop_index_to_string( 6351 prop, intval, &unused)); 6352 } 6353 VERIFY0(zap_update(mos, 6354 spa->spa_pool_props_object, propname, 6355 8, 1, &intval, tx)); 6356 spa_history_log_internal(spa, "set", tx, 6357 "%s=%lld", nvpair_name(elem), intval); 6358 } else { 6359 ASSERT(0); /* not allowed */ 6360 } 6361 6362 switch (prop) { 6363 case ZPOOL_PROP_DELEGATION: 6364 spa->spa_delegation = intval; 6365 break; 6366 case ZPOOL_PROP_BOOTFS: 6367 spa->spa_bootfs = intval; 6368 break; 6369 case ZPOOL_PROP_FAILUREMODE: 6370 spa->spa_failmode = intval; 6371 break; 6372 case ZPOOL_PROP_AUTOEXPAND: 6373 spa->spa_autoexpand = intval; 6374 if (tx->tx_txg != TXG_INITIAL) 6375 spa_async_request(spa, 6376 SPA_ASYNC_AUTOEXPAND); 6377 break; 6378 case ZPOOL_PROP_DEDUPDITTO: 6379 spa->spa_dedup_ditto = intval; 6380 break; 6381 default: 6382 break; 6383 } 6384 } 6385 6386 } 6387 6388 mutex_exit(&spa->spa_props_lock); 6389} 6390 6391/* 6392 * Perform one-time upgrade on-disk changes. spa_version() does not 6393 * reflect the new version this txg, so there must be no changes this 6394 * txg to anything that the upgrade code depends on after it executes. 6395 * Therefore this must be called after dsl_pool_sync() does the sync 6396 * tasks. 6397 */ 6398static void 6399spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 6400{ 6401 dsl_pool_t *dp = spa->spa_dsl_pool; 6402 6403 ASSERT(spa->spa_sync_pass == 1); 6404 6405 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); 6406 6407 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 6408 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 6409 dsl_pool_create_origin(dp, tx); 6410 6411 /* Keeping the origin open increases spa_minref */ 6412 spa->spa_minref += 3; 6413 } 6414 6415 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 6416 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 6417 dsl_pool_upgrade_clones(dp, tx); 6418 } 6419 6420 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 6421 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 6422 dsl_pool_upgrade_dir_clones(dp, tx); 6423 6424 /* Keeping the freedir open increases spa_minref */ 6425 spa->spa_minref += 3; 6426 } 6427 6428 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 6429 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6430 spa_feature_create_zap_objects(spa, tx); 6431 } 6432 rrw_exit(&dp->dp_config_rwlock, FTAG); 6433} 6434 6435/* 6436 * Sync the specified transaction group. New blocks may be dirtied as 6437 * part of the process, so we iterate until it converges. 6438 */ 6439void 6440spa_sync(spa_t *spa, uint64_t txg) 6441{ 6442 dsl_pool_t *dp = spa->spa_dsl_pool; 6443 objset_t *mos = spa->spa_meta_objset; 6444 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 6445 vdev_t *rvd = spa->spa_root_vdev; 6446 vdev_t *vd; 6447 dmu_tx_t *tx; 6448 int error; 6449 6450 VERIFY(spa_writeable(spa)); 6451 6452 /* 6453 * Lock out configuration changes. 6454 */ 6455 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 6456 6457 spa->spa_syncing_txg = txg; 6458 spa->spa_sync_pass = 0; 6459 6460 /* 6461 * If there are any pending vdev state changes, convert them 6462 * into config changes that go out with this transaction group. 6463 */ 6464 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6465 while (list_head(&spa->spa_state_dirty_list) != NULL) { 6466 /* 6467 * We need the write lock here because, for aux vdevs, 6468 * calling vdev_config_dirty() modifies sav_config. 6469 * This is ugly and will become unnecessary when we 6470 * eliminate the aux vdev wart by integrating all vdevs 6471 * into the root vdev tree. 6472 */ 6473 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6474 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 6475 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 6476 vdev_state_clean(vd); 6477 vdev_config_dirty(vd); 6478 } 6479 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6480 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6481 } 6482 spa_config_exit(spa, SCL_STATE, FTAG); 6483 6484 tx = dmu_tx_create_assigned(dp, txg); 6485 6486 spa->spa_sync_starttime = gethrtime(); 6487#ifdef illumos 6488 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, 6489 spa->spa_sync_starttime + spa->spa_deadman_synctime)); 6490#else /* FreeBSD */ 6491#ifdef _KERNEL 6492 callout_reset(&spa->spa_deadman_cycid, 6493 hz * spa->spa_deadman_synctime / NANOSEC, spa_deadman, spa); 6494#endif 6495#endif 6496 6497 /* 6498 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 6499 * set spa_deflate if we have no raid-z vdevs. 6500 */ 6501 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 6502 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 6503 int i; 6504 6505 for (i = 0; i < rvd->vdev_children; i++) { 6506 vd = rvd->vdev_child[i]; 6507 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 6508 break; 6509 } 6510 if (i == rvd->vdev_children) { 6511 spa->spa_deflate = TRUE; 6512 VERIFY(0 == zap_add(spa->spa_meta_objset, 6513 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 6514 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 6515 } 6516 } 6517 6518 /* 6519 * If anything has changed in this txg, or if someone is waiting 6520 * for this txg to sync (eg, spa_vdev_remove()), push the 6521 * deferred frees from the previous txg. If not, leave them 6522 * alone so that we don't generate work on an otherwise idle 6523 * system. 6524 */ 6525 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || 6526 !txg_list_empty(&dp->dp_dirty_dirs, txg) || 6527 !txg_list_empty(&dp->dp_sync_tasks, txg) || 6528 ((dsl_scan_active(dp->dp_scan) || 6529 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) { 6530 spa_sync_deferred_frees(spa, tx); 6531 } 6532 6533 /* 6534 * Iterate to convergence. 6535 */ 6536 do { 6537 int pass = ++spa->spa_sync_pass; 6538 6539 spa_sync_config_object(spa, tx); 6540 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 6541 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 6542 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 6543 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 6544 spa_errlog_sync(spa, txg); 6545 dsl_pool_sync(dp, txg); 6546 6547 if (pass < zfs_sync_pass_deferred_free) { 6548 spa_sync_frees(spa, free_bpl, tx); 6549 } else { 6550 bplist_iterate(free_bpl, bpobj_enqueue_cb, 6551 &spa->spa_deferred_bpobj, tx); 6552 } 6553 6554 ddt_sync(spa, txg); 6555 dsl_scan_sync(dp, tx); 6556 6557 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 6558 vdev_sync(vd, txg); 6559 6560 if (pass == 1) 6561 spa_sync_upgrades(spa, tx); 6562 6563 } while (dmu_objset_is_dirty(mos, txg)); 6564 6565 /* 6566 * Rewrite the vdev configuration (which includes the uberblock) 6567 * to commit the transaction group. 6568 * 6569 * If there are no dirty vdevs, we sync the uberblock to a few 6570 * random top-level vdevs that are known to be visible in the 6571 * config cache (see spa_vdev_add() for a complete description). 6572 * If there *are* dirty vdevs, sync the uberblock to all vdevs. 6573 */ 6574 for (;;) { 6575 /* 6576 * We hold SCL_STATE to prevent vdev open/close/etc. 6577 * while we're attempting to write the vdev labels. 6578 */ 6579 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6580 6581 if (list_is_empty(&spa->spa_config_dirty_list)) { 6582 vdev_t *svd[SPA_DVAS_PER_BP]; 6583 int svdcount = 0; 6584 int children = rvd->vdev_children; 6585 int c0 = spa_get_random(children); 6586 6587 for (int c = 0; c < children; c++) { 6588 vd = rvd->vdev_child[(c0 + c) % children]; 6589 if (vd->vdev_ms_array == 0 || vd->vdev_islog) 6590 continue; 6591 svd[svdcount++] = vd; 6592 if (svdcount == SPA_DVAS_PER_BP) 6593 break; 6594 } 6595 error = vdev_config_sync(svd, svdcount, txg, B_FALSE); 6596 if (error != 0) 6597 error = vdev_config_sync(svd, svdcount, txg, 6598 B_TRUE); 6599 } else { 6600 error = vdev_config_sync(rvd->vdev_child, 6601 rvd->vdev_children, txg, B_FALSE); 6602 if (error != 0) 6603 error = vdev_config_sync(rvd->vdev_child, 6604 rvd->vdev_children, txg, B_TRUE); 6605 } 6606 6607 if (error == 0) 6608 spa->spa_last_synced_guid = rvd->vdev_guid; 6609 6610 spa_config_exit(spa, SCL_STATE, FTAG); 6611 6612 if (error == 0) 6613 break; 6614 zio_suspend(spa, NULL); 6615 zio_resume_wait(spa); 6616 } 6617 dmu_tx_commit(tx); 6618 6619#ifdef illumos 6620 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 6621#else /* FreeBSD */ 6622#ifdef _KERNEL 6623 callout_drain(&spa->spa_deadman_cycid); 6624#endif 6625#endif 6626 6627 /* 6628 * Clear the dirty config list. 6629 */ 6630 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 6631 vdev_config_clean(vd); 6632 6633 /* 6634 * Now that the new config has synced transactionally, 6635 * let it become visible to the config cache. 6636 */ 6637 if (spa->spa_config_syncing != NULL) { 6638 spa_config_set(spa, spa->spa_config_syncing); 6639 spa->spa_config_txg = txg; 6640 spa->spa_config_syncing = NULL; 6641 } 6642 6643 spa->spa_ubsync = spa->spa_uberblock; 6644 6645 dsl_pool_sync_done(dp, txg); 6646 6647 /* 6648 * Update usable space statistics. 6649 */ 6650 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 6651 vdev_sync_done(vd, txg); 6652 6653 spa_update_dspace(spa); 6654 6655 /* 6656 * It had better be the case that we didn't dirty anything 6657 * since vdev_config_sync(). 6658 */ 6659 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 6660 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 6661 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 6662 6663 spa->spa_sync_pass = 0; 6664 6665 spa_config_exit(spa, SCL_CONFIG, FTAG); 6666 6667 spa_handle_ignored_writes(spa); 6668 6669 /* 6670 * If any async tasks have been requested, kick them off. 6671 */ 6672 spa_async_dispatch(spa); 6673 spa_async_dispatch_vd(spa); 6674} 6675 6676/* 6677 * Sync all pools. We don't want to hold the namespace lock across these 6678 * operations, so we take a reference on the spa_t and drop the lock during the 6679 * sync. 6680 */ 6681void 6682spa_sync_allpools(void) 6683{ 6684 spa_t *spa = NULL; 6685 mutex_enter(&spa_namespace_lock); 6686 while ((spa = spa_next(spa)) != NULL) { 6687 if (spa_state(spa) != POOL_STATE_ACTIVE || 6688 !spa_writeable(spa) || spa_suspended(spa)) 6689 continue; 6690 spa_open_ref(spa, FTAG); 6691 mutex_exit(&spa_namespace_lock); 6692 txg_wait_synced(spa_get_dsl(spa), 0); 6693 mutex_enter(&spa_namespace_lock); 6694 spa_close(spa, FTAG); 6695 } 6696 mutex_exit(&spa_namespace_lock); 6697} 6698 6699/* 6700 * ========================================================================== 6701 * Miscellaneous routines 6702 * ========================================================================== 6703 */ 6704 6705/* 6706 * Remove all pools in the system. 6707 */ 6708void 6709spa_evict_all(void) 6710{ 6711 spa_t *spa; 6712 6713 /* 6714 * Remove all cached state. All pools should be closed now, 6715 * so every spa in the AVL tree should be unreferenced. 6716 */ 6717 mutex_enter(&spa_namespace_lock); 6718 while ((spa = spa_next(NULL)) != NULL) { 6719 /* 6720 * Stop async tasks. The async thread may need to detach 6721 * a device that's been replaced, which requires grabbing 6722 * spa_namespace_lock, so we must drop it here. 6723 */ 6724 spa_open_ref(spa, FTAG); 6725 mutex_exit(&spa_namespace_lock); 6726 spa_async_suspend(spa); 6727 mutex_enter(&spa_namespace_lock); 6728 spa_close(spa, FTAG); 6729 6730 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 6731 spa_unload(spa); 6732 spa_deactivate(spa); 6733 } 6734 spa_remove(spa); 6735 } 6736 mutex_exit(&spa_namespace_lock); 6737} 6738 6739vdev_t * 6740spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 6741{ 6742 vdev_t *vd; 6743 int i; 6744 6745 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 6746 return (vd); 6747 6748 if (aux) { 6749 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 6750 vd = spa->spa_l2cache.sav_vdevs[i]; 6751 if (vd->vdev_guid == guid) 6752 return (vd); 6753 } 6754 6755 for (i = 0; i < spa->spa_spares.sav_count; i++) { 6756 vd = spa->spa_spares.sav_vdevs[i]; 6757 if (vd->vdev_guid == guid) 6758 return (vd); 6759 } 6760 } 6761 6762 return (NULL); 6763} 6764 6765void 6766spa_upgrade(spa_t *spa, uint64_t version) 6767{ 6768 ASSERT(spa_writeable(spa)); 6769 6770 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 6771 6772 /* 6773 * This should only be called for a non-faulted pool, and since a 6774 * future version would result in an unopenable pool, this shouldn't be 6775 * possible. 6776 */ 6777 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); 6778 ASSERT3U(version, >=, spa->spa_uberblock.ub_version); 6779 6780 spa->spa_uberblock.ub_version = version; 6781 vdev_config_dirty(spa->spa_root_vdev); 6782 6783 spa_config_exit(spa, SCL_ALL, FTAG); 6784 6785 txg_wait_synced(spa_get_dsl(spa), 0); 6786} 6787 6788boolean_t 6789spa_has_spare(spa_t *spa, uint64_t guid) 6790{ 6791 int i; 6792 uint64_t spareguid; 6793 spa_aux_vdev_t *sav = &spa->spa_spares; 6794 6795 for (i = 0; i < sav->sav_count; i++) 6796 if (sav->sav_vdevs[i]->vdev_guid == guid) 6797 return (B_TRUE); 6798 6799 for (i = 0; i < sav->sav_npending; i++) { 6800 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 6801 &spareguid) == 0 && spareguid == guid) 6802 return (B_TRUE); 6803 } 6804 6805 return (B_FALSE); 6806} 6807 6808/* 6809 * Check if a pool has an active shared spare device. 6810 * Note: reference count of an active spare is 2, as a spare and as a replace 6811 */ 6812static boolean_t 6813spa_has_active_shared_spare(spa_t *spa) 6814{ 6815 int i, refcnt; 6816 uint64_t pool; 6817 spa_aux_vdev_t *sav = &spa->spa_spares; 6818 6819 for (i = 0; i < sav->sav_count; i++) { 6820 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 6821 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 6822 refcnt > 2) 6823 return (B_TRUE); 6824 } 6825 6826 return (B_FALSE); 6827} 6828 6829/* 6830 * Post a sysevent corresponding to the given event. The 'name' must be one of 6831 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 6832 * filled in from the spa and (optionally) the vdev. This doesn't do anything 6833 * in the userland libzpool, as we don't want consumers to misinterpret ztest 6834 * or zdb as real changes. 6835 */ 6836void 6837spa_event_notify(spa_t *spa, vdev_t *vd, const char *name) 6838{ 6839#ifdef _KERNEL 6840 sysevent_t *ev; 6841 sysevent_attr_list_t *attr = NULL; 6842 sysevent_value_t value; 6843 sysevent_id_t eid; 6844 6845 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 6846 SE_SLEEP); 6847 6848 value.value_type = SE_DATA_TYPE_STRING; 6849 value.value.sv_string = spa_name(spa); 6850 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 6851 goto done; 6852 6853 value.value_type = SE_DATA_TYPE_UINT64; 6854 value.value.sv_uint64 = spa_guid(spa); 6855 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 6856 goto done; 6857 6858 if (vd) { 6859 value.value_type = SE_DATA_TYPE_UINT64; 6860 value.value.sv_uint64 = vd->vdev_guid; 6861 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 6862 SE_SLEEP) != 0) 6863 goto done; 6864 6865 if (vd->vdev_path) { 6866 value.value_type = SE_DATA_TYPE_STRING; 6867 value.value.sv_string = vd->vdev_path; 6868 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 6869 &value, SE_SLEEP) != 0) 6870 goto done; 6871 } 6872 } 6873 6874 if (sysevent_attach_attributes(ev, attr) != 0) 6875 goto done; 6876 attr = NULL; 6877 6878 (void) log_sysevent(ev, SE_SLEEP, &eid); 6879 6880done: 6881 if (attr) 6882 sysevent_free_attr(attr); 6883 sysevent_free(ev); 6884#endif 6885} 6886