spa.c revision 269773
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 (c) 2013, 2014, Nexenta Systems, Inc. All rights reserved. 26 * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 27 */ 28 29/* 30 * SPA: Storage Pool Allocator 31 * 32 * This file contains all the routines used when modifying on-disk SPA state. 33 * This includes opening, importing, destroying, exporting a pool, and syncing a 34 * pool. 35 */ 36 37#include <sys/zfs_context.h> 38#include <sys/fm/fs/zfs.h> 39#include <sys/spa_impl.h> 40#include <sys/zio.h> 41#include <sys/zio_checksum.h> 42#include <sys/dmu.h> 43#include <sys/dmu_tx.h> 44#include <sys/zap.h> 45#include <sys/zil.h> 46#include <sys/ddt.h> 47#include <sys/vdev_impl.h> 48#include <sys/metaslab.h> 49#include <sys/metaslab_impl.h> 50#include <sys/uberblock_impl.h> 51#include <sys/txg.h> 52#include <sys/avl.h> 53#include <sys/dmu_traverse.h> 54#include <sys/dmu_objset.h> 55#include <sys/unique.h> 56#include <sys/dsl_pool.h> 57#include <sys/dsl_dataset.h> 58#include <sys/dsl_dir.h> 59#include <sys/dsl_prop.h> 60#include <sys/dsl_synctask.h> 61#include <sys/fs/zfs.h> 62#include <sys/arc.h> 63#include <sys/callb.h> 64#include <sys/spa_boot.h> 65#include <sys/zfs_ioctl.h> 66#include <sys/dsl_scan.h> 67#include <sys/dmu_send.h> 68#include <sys/dsl_destroy.h> 69#include <sys/dsl_userhold.h> 70#include <sys/zfeature.h> 71#include <sys/zvol.h> 72#include <sys/trim_map.h> 73 74#ifdef _KERNEL 75#include <sys/callb.h> 76#include <sys/cpupart.h> 77#include <sys/zone.h> 78#endif /* _KERNEL */ 79 80#include "zfs_prop.h" 81#include "zfs_comutil.h" 82 83/* Check hostid on import? */ 84static int check_hostid = 1; 85 86SYSCTL_DECL(_vfs_zfs); 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, alloc, cap, version; 215 zprop_source_t src = ZPROP_SRC_NONE; 216 spa_config_dirent_t *dp; 217 metaslab_class_t *mc = spa_normal_class(spa); 218 219 ASSERT(MUTEX_HELD(&spa->spa_props_lock)); 220 221 if (rvd != NULL) { 222 alloc = metaslab_class_get_alloc(spa_normal_class(spa)); 223 size = metaslab_class_get_space(spa_normal_class(spa)); 224 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); 225 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); 226 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); 227 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, 228 size - alloc, src); 229 230 spa_prop_add_list(*nvp, ZPOOL_PROP_FRAGMENTATION, NULL, 231 metaslab_class_fragmentation(mc), src); 232 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, 233 metaslab_class_expandable_space(mc), src); 234 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, 235 (spa_mode(spa) == FREAD), src); 236 237 cap = (size == 0) ? 0 : (alloc * 100 / size); 238 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); 239 240 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, 241 ddt_get_pool_dedup_ratio(spa), src); 242 243 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, 244 rvd->vdev_state, src); 245 246 version = spa_version(spa); 247 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) 248 src = ZPROP_SRC_DEFAULT; 249 else 250 src = ZPROP_SRC_LOCAL; 251 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src); 252 } 253 254 if (pool != NULL) { 255 /* 256 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, 257 * when opening pools before this version freedir will be NULL. 258 */ 259 if (pool->dp_free_dir != NULL) { 260 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, 261 pool->dp_free_dir->dd_phys->dd_used_bytes, src); 262 } else { 263 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, 264 NULL, 0, src); 265 } 266 267 if (pool->dp_leak_dir != NULL) { 268 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL, 269 pool->dp_leak_dir->dd_phys->dd_used_bytes, src); 270 } else { 271 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, 272 NULL, 0, src); 273 } 274 } 275 276 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); 277 278 if (spa->spa_comment != NULL) { 279 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, 280 0, ZPROP_SRC_LOCAL); 281 } 282 283 if (spa->spa_root != NULL) 284 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, 285 0, ZPROP_SRC_LOCAL); 286 287 if ((dp = list_head(&spa->spa_config_list)) != NULL) { 288 if (dp->scd_path == NULL) { 289 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 290 "none", 0, ZPROP_SRC_LOCAL); 291 } else if (strcmp(dp->scd_path, spa_config_path) != 0) { 292 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 293 dp->scd_path, 0, ZPROP_SRC_LOCAL); 294 } 295 } 296} 297 298/* 299 * Get zpool property values. 300 */ 301int 302spa_prop_get(spa_t *spa, nvlist_t **nvp) 303{ 304 objset_t *mos = spa->spa_meta_objset; 305 zap_cursor_t zc; 306 zap_attribute_t za; 307 int err; 308 309 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 310 311 mutex_enter(&spa->spa_props_lock); 312 313 /* 314 * Get properties from the spa config. 315 */ 316 spa_prop_get_config(spa, nvp); 317 318 /* If no pool property object, no more prop to get. */ 319 if (mos == NULL || spa->spa_pool_props_object == 0) { 320 mutex_exit(&spa->spa_props_lock); 321 return (0); 322 } 323 324 /* 325 * Get properties from the MOS pool property object. 326 */ 327 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); 328 (err = zap_cursor_retrieve(&zc, &za)) == 0; 329 zap_cursor_advance(&zc)) { 330 uint64_t intval = 0; 331 char *strval = NULL; 332 zprop_source_t src = ZPROP_SRC_DEFAULT; 333 zpool_prop_t prop; 334 335 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL) 336 continue; 337 338 switch (za.za_integer_length) { 339 case 8: 340 /* integer property */ 341 if (za.za_first_integer != 342 zpool_prop_default_numeric(prop)) 343 src = ZPROP_SRC_LOCAL; 344 345 if (prop == ZPOOL_PROP_BOOTFS) { 346 dsl_pool_t *dp; 347 dsl_dataset_t *ds = NULL; 348 349 dp = spa_get_dsl(spa); 350 dsl_pool_config_enter(dp, FTAG); 351 if (err = dsl_dataset_hold_obj(dp, 352 za.za_first_integer, FTAG, &ds)) { 353 dsl_pool_config_exit(dp, FTAG); 354 break; 355 } 356 357 strval = kmem_alloc( 358 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, 359 KM_SLEEP); 360 dsl_dataset_name(ds, strval); 361 dsl_dataset_rele(ds, FTAG); 362 dsl_pool_config_exit(dp, FTAG); 363 } else { 364 strval = NULL; 365 intval = za.za_first_integer; 366 } 367 368 spa_prop_add_list(*nvp, prop, strval, intval, src); 369 370 if (strval != NULL) 371 kmem_free(strval, 372 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); 373 374 break; 375 376 case 1: 377 /* string property */ 378 strval = kmem_alloc(za.za_num_integers, KM_SLEEP); 379 err = zap_lookup(mos, spa->spa_pool_props_object, 380 za.za_name, 1, za.za_num_integers, strval); 381 if (err) { 382 kmem_free(strval, za.za_num_integers); 383 break; 384 } 385 spa_prop_add_list(*nvp, prop, strval, 0, src); 386 kmem_free(strval, za.za_num_integers); 387 break; 388 389 default: 390 break; 391 } 392 } 393 zap_cursor_fini(&zc); 394 mutex_exit(&spa->spa_props_lock); 395out: 396 if (err && err != ENOENT) { 397 nvlist_free(*nvp); 398 *nvp = NULL; 399 return (err); 400 } 401 402 return (0); 403} 404 405/* 406 * Validate the given pool properties nvlist and modify the list 407 * for the property values to be set. 408 */ 409static int 410spa_prop_validate(spa_t *spa, nvlist_t *props) 411{ 412 nvpair_t *elem; 413 int error = 0, reset_bootfs = 0; 414 uint64_t objnum = 0; 415 boolean_t has_feature = B_FALSE; 416 417 elem = NULL; 418 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 419 uint64_t intval; 420 char *strval, *slash, *check, *fname; 421 const char *propname = nvpair_name(elem); 422 zpool_prop_t prop = zpool_name_to_prop(propname); 423 424 switch (prop) { 425 case ZPROP_INVAL: 426 if (!zpool_prop_feature(propname)) { 427 error = SET_ERROR(EINVAL); 428 break; 429 } 430 431 /* 432 * Sanitize the input. 433 */ 434 if (nvpair_type(elem) != DATA_TYPE_UINT64) { 435 error = SET_ERROR(EINVAL); 436 break; 437 } 438 439 if (nvpair_value_uint64(elem, &intval) != 0) { 440 error = SET_ERROR(EINVAL); 441 break; 442 } 443 444 if (intval != 0) { 445 error = SET_ERROR(EINVAL); 446 break; 447 } 448 449 fname = strchr(propname, '@') + 1; 450 if (zfeature_lookup_name(fname, NULL) != 0) { 451 error = SET_ERROR(EINVAL); 452 break; 453 } 454 455 has_feature = B_TRUE; 456 break; 457 458 case ZPOOL_PROP_VERSION: 459 error = nvpair_value_uint64(elem, &intval); 460 if (!error && 461 (intval < spa_version(spa) || 462 intval > SPA_VERSION_BEFORE_FEATURES || 463 has_feature)) 464 error = SET_ERROR(EINVAL); 465 break; 466 467 case ZPOOL_PROP_DELEGATION: 468 case ZPOOL_PROP_AUTOREPLACE: 469 case ZPOOL_PROP_LISTSNAPS: 470 case ZPOOL_PROP_AUTOEXPAND: 471 error = nvpair_value_uint64(elem, &intval); 472 if (!error && intval > 1) 473 error = SET_ERROR(EINVAL); 474 break; 475 476 case ZPOOL_PROP_BOOTFS: 477 /* 478 * If the pool version is less than SPA_VERSION_BOOTFS, 479 * or the pool is still being created (version == 0), 480 * the bootfs property cannot be set. 481 */ 482 if (spa_version(spa) < SPA_VERSION_BOOTFS) { 483 error = SET_ERROR(ENOTSUP); 484 break; 485 } 486 487 /* 488 * Make sure the vdev config is bootable 489 */ 490 if (!vdev_is_bootable(spa->spa_root_vdev)) { 491 error = SET_ERROR(ENOTSUP); 492 break; 493 } 494 495 reset_bootfs = 1; 496 497 error = nvpair_value_string(elem, &strval); 498 499 if (!error) { 500 objset_t *os; 501 uint64_t compress; 502 503 if (strval == NULL || strval[0] == '\0') { 504 objnum = zpool_prop_default_numeric( 505 ZPOOL_PROP_BOOTFS); 506 break; 507 } 508 509 if (error = dmu_objset_hold(strval, FTAG, &os)) 510 break; 511 512 /* Must be ZPL and not gzip compressed. */ 513 514 if (dmu_objset_type(os) != DMU_OST_ZFS) { 515 error = SET_ERROR(ENOTSUP); 516 } else if ((error = 517 dsl_prop_get_int_ds(dmu_objset_ds(os), 518 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 519 &compress)) == 0 && 520 !BOOTFS_COMPRESS_VALID(compress)) { 521 error = SET_ERROR(ENOTSUP); 522 } else { 523 objnum = dmu_objset_id(os); 524 } 525 dmu_objset_rele(os, FTAG); 526 } 527 break; 528 529 case ZPOOL_PROP_FAILUREMODE: 530 error = nvpair_value_uint64(elem, &intval); 531 if (!error && (intval < ZIO_FAILURE_MODE_WAIT || 532 intval > ZIO_FAILURE_MODE_PANIC)) 533 error = SET_ERROR(EINVAL); 534 535 /* 536 * This is a special case which only occurs when 537 * the pool has completely failed. This allows 538 * the user to change the in-core failmode property 539 * without syncing it out to disk (I/Os might 540 * currently be blocked). We do this by returning 541 * EIO to the caller (spa_prop_set) to trick it 542 * into thinking we encountered a property validation 543 * error. 544 */ 545 if (!error && spa_suspended(spa)) { 546 spa->spa_failmode = intval; 547 error = SET_ERROR(EIO); 548 } 549 break; 550 551 case ZPOOL_PROP_CACHEFILE: 552 if ((error = nvpair_value_string(elem, &strval)) != 0) 553 break; 554 555 if (strval[0] == '\0') 556 break; 557 558 if (strcmp(strval, "none") == 0) 559 break; 560 561 if (strval[0] != '/') { 562 error = SET_ERROR(EINVAL); 563 break; 564 } 565 566 slash = strrchr(strval, '/'); 567 ASSERT(slash != NULL); 568 569 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 570 strcmp(slash, "/..") == 0) 571 error = SET_ERROR(EINVAL); 572 break; 573 574 case ZPOOL_PROP_COMMENT: 575 if ((error = nvpair_value_string(elem, &strval)) != 0) 576 break; 577 for (check = strval; *check != '\0'; check++) { 578 /* 579 * The kernel doesn't have an easy isprint() 580 * check. For this kernel check, we merely 581 * check ASCII apart from DEL. Fix this if 582 * there is an easy-to-use kernel isprint(). 583 */ 584 if (*check >= 0x7f) { 585 error = SET_ERROR(EINVAL); 586 break; 587 } 588 check++; 589 } 590 if (strlen(strval) > ZPROP_MAX_COMMENT) 591 error = E2BIG; 592 break; 593 594 case ZPOOL_PROP_DEDUPDITTO: 595 if (spa_version(spa) < SPA_VERSION_DEDUP) 596 error = SET_ERROR(ENOTSUP); 597 else 598 error = nvpair_value_uint64(elem, &intval); 599 if (error == 0 && 600 intval != 0 && intval < ZIO_DEDUPDITTO_MIN) 601 error = SET_ERROR(EINVAL); 602 break; 603 } 604 605 if (error) 606 break; 607 } 608 609 if (!error && reset_bootfs) { 610 error = nvlist_remove(props, 611 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); 612 613 if (!error) { 614 error = nvlist_add_uint64(props, 615 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); 616 } 617 } 618 619 return (error); 620} 621 622void 623spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) 624{ 625 char *cachefile; 626 spa_config_dirent_t *dp; 627 628 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), 629 &cachefile) != 0) 630 return; 631 632 dp = kmem_alloc(sizeof (spa_config_dirent_t), 633 KM_SLEEP); 634 635 if (cachefile[0] == '\0') 636 dp->scd_path = spa_strdup(spa_config_path); 637 else if (strcmp(cachefile, "none") == 0) 638 dp->scd_path = NULL; 639 else 640 dp->scd_path = spa_strdup(cachefile); 641 642 list_insert_head(&spa->spa_config_list, dp); 643 if (need_sync) 644 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 645} 646 647int 648spa_prop_set(spa_t *spa, nvlist_t *nvp) 649{ 650 int error; 651 nvpair_t *elem = NULL; 652 boolean_t need_sync = B_FALSE; 653 654 if ((error = spa_prop_validate(spa, nvp)) != 0) 655 return (error); 656 657 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { 658 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); 659 660 if (prop == ZPOOL_PROP_CACHEFILE || 661 prop == ZPOOL_PROP_ALTROOT || 662 prop == ZPOOL_PROP_READONLY) 663 continue; 664 665 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) { 666 uint64_t ver; 667 668 if (prop == ZPOOL_PROP_VERSION) { 669 VERIFY(nvpair_value_uint64(elem, &ver) == 0); 670 } else { 671 ASSERT(zpool_prop_feature(nvpair_name(elem))); 672 ver = SPA_VERSION_FEATURES; 673 need_sync = B_TRUE; 674 } 675 676 /* Save time if the version is already set. */ 677 if (ver == spa_version(spa)) 678 continue; 679 680 /* 681 * In addition to the pool directory object, we might 682 * create the pool properties object, the features for 683 * read object, the features for write object, or the 684 * feature descriptions object. 685 */ 686 error = dsl_sync_task(spa->spa_name, NULL, 687 spa_sync_version, &ver, 688 6, ZFS_SPACE_CHECK_RESERVED); 689 if (error) 690 return (error); 691 continue; 692 } 693 694 need_sync = B_TRUE; 695 break; 696 } 697 698 if (need_sync) { 699 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props, 700 nvp, 6, ZFS_SPACE_CHECK_RESERVED)); 701 } 702 703 return (0); 704} 705 706/* 707 * If the bootfs property value is dsobj, clear it. 708 */ 709void 710spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) 711{ 712 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { 713 VERIFY(zap_remove(spa->spa_meta_objset, 714 spa->spa_pool_props_object, 715 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); 716 spa->spa_bootfs = 0; 717 } 718} 719 720/*ARGSUSED*/ 721static int 722spa_change_guid_check(void *arg, dmu_tx_t *tx) 723{ 724 uint64_t *newguid = arg; 725 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 726 vdev_t *rvd = spa->spa_root_vdev; 727 uint64_t vdev_state; 728 729 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 730 vdev_state = rvd->vdev_state; 731 spa_config_exit(spa, SCL_STATE, FTAG); 732 733 if (vdev_state != VDEV_STATE_HEALTHY) 734 return (SET_ERROR(ENXIO)); 735 736 ASSERT3U(spa_guid(spa), !=, *newguid); 737 738 return (0); 739} 740 741static void 742spa_change_guid_sync(void *arg, dmu_tx_t *tx) 743{ 744 uint64_t *newguid = arg; 745 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 746 uint64_t oldguid; 747 vdev_t *rvd = spa->spa_root_vdev; 748 749 oldguid = spa_guid(spa); 750 751 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 752 rvd->vdev_guid = *newguid; 753 rvd->vdev_guid_sum += (*newguid - oldguid); 754 vdev_config_dirty(rvd); 755 spa_config_exit(spa, SCL_STATE, FTAG); 756 757 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu", 758 oldguid, *newguid); 759} 760 761/* 762 * Change the GUID for the pool. This is done so that we can later 763 * re-import a pool built from a clone of our own vdevs. We will modify 764 * the root vdev's guid, our own pool guid, and then mark all of our 765 * vdevs dirty. Note that we must make sure that all our vdevs are 766 * online when we do this, or else any vdevs that weren't present 767 * would be orphaned from our pool. We are also going to issue a 768 * sysevent to update any watchers. 769 */ 770int 771spa_change_guid(spa_t *spa) 772{ 773 int error; 774 uint64_t guid; 775 776 mutex_enter(&spa->spa_vdev_top_lock); 777 mutex_enter(&spa_namespace_lock); 778 guid = spa_generate_guid(NULL); 779 780 error = dsl_sync_task(spa->spa_name, spa_change_guid_check, 781 spa_change_guid_sync, &guid, 5, ZFS_SPACE_CHECK_RESERVED); 782 783 if (error == 0) { 784 spa_config_sync(spa, B_FALSE, B_TRUE); 785 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID); 786 } 787 788 mutex_exit(&spa_namespace_lock); 789 mutex_exit(&spa->spa_vdev_top_lock); 790 791 return (error); 792} 793 794/* 795 * ========================================================================== 796 * SPA state manipulation (open/create/destroy/import/export) 797 * ========================================================================== 798 */ 799 800static int 801spa_error_entry_compare(const void *a, const void *b) 802{ 803 spa_error_entry_t *sa = (spa_error_entry_t *)a; 804 spa_error_entry_t *sb = (spa_error_entry_t *)b; 805 int ret; 806 807 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, 808 sizeof (zbookmark_phys_t)); 809 810 if (ret < 0) 811 return (-1); 812 else if (ret > 0) 813 return (1); 814 else 815 return (0); 816} 817 818/* 819 * Utility function which retrieves copies of the current logs and 820 * re-initializes them in the process. 821 */ 822void 823spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 824{ 825 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); 826 827 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); 828 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); 829 830 avl_create(&spa->spa_errlist_scrub, 831 spa_error_entry_compare, sizeof (spa_error_entry_t), 832 offsetof(spa_error_entry_t, se_avl)); 833 avl_create(&spa->spa_errlist_last, 834 spa_error_entry_compare, sizeof (spa_error_entry_t), 835 offsetof(spa_error_entry_t, se_avl)); 836} 837 838static void 839spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 840{ 841 const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; 842 enum zti_modes mode = ztip->zti_mode; 843 uint_t value = ztip->zti_value; 844 uint_t count = ztip->zti_count; 845 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 846 char name[32]; 847 uint_t flags = 0; 848 boolean_t batch = B_FALSE; 849 850 if (mode == ZTI_MODE_NULL) { 851 tqs->stqs_count = 0; 852 tqs->stqs_taskq = NULL; 853 return; 854 } 855 856 ASSERT3U(count, >, 0); 857 858 tqs->stqs_count = count; 859 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP); 860 861 switch (mode) { 862 case ZTI_MODE_FIXED: 863 ASSERT3U(value, >=, 1); 864 value = MAX(value, 1); 865 break; 866 867 case ZTI_MODE_BATCH: 868 batch = B_TRUE; 869 flags |= TASKQ_THREADS_CPU_PCT; 870 value = zio_taskq_batch_pct; 871 break; 872 873 default: 874 panic("unrecognized mode for %s_%s taskq (%u:%u) in " 875 "spa_activate()", 876 zio_type_name[t], zio_taskq_types[q], mode, value); 877 break; 878 } 879 880 for (uint_t i = 0; i < count; i++) { 881 taskq_t *tq; 882 883 if (count > 1) { 884 (void) snprintf(name, sizeof (name), "%s_%s_%u", 885 zio_type_name[t], zio_taskq_types[q], i); 886 } else { 887 (void) snprintf(name, sizeof (name), "%s_%s", 888 zio_type_name[t], zio_taskq_types[q]); 889 } 890 891#ifdef SYSDC 892 if (zio_taskq_sysdc && spa->spa_proc != &p0) { 893 if (batch) 894 flags |= TASKQ_DC_BATCH; 895 896 tq = taskq_create_sysdc(name, value, 50, INT_MAX, 897 spa->spa_proc, zio_taskq_basedc, flags); 898 } else { 899#endif 900 pri_t pri = maxclsyspri; 901 /* 902 * The write issue taskq can be extremely CPU 903 * intensive. Run it at slightly lower priority 904 * than the other taskqs. 905 */ 906 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) 907 pri--; 908 909 tq = taskq_create_proc(name, value, pri, 50, 910 INT_MAX, spa->spa_proc, flags); 911#ifdef SYSDC 912 } 913#endif 914 915 tqs->stqs_taskq[i] = tq; 916 } 917} 918 919static void 920spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 921{ 922 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 923 924 if (tqs->stqs_taskq == NULL) { 925 ASSERT0(tqs->stqs_count); 926 return; 927 } 928 929 for (uint_t i = 0; i < tqs->stqs_count; i++) { 930 ASSERT3P(tqs->stqs_taskq[i], !=, NULL); 931 taskq_destroy(tqs->stqs_taskq[i]); 932 } 933 934 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *)); 935 tqs->stqs_taskq = NULL; 936} 937 938/* 939 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority. 940 * Note that a type may have multiple discrete taskqs to avoid lock contention 941 * on the taskq itself. In that case we choose which taskq at random by using 942 * the low bits of gethrtime(). 943 */ 944void 945spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 946 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent) 947{ 948 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 949 taskq_t *tq; 950 951 ASSERT3P(tqs->stqs_taskq, !=, NULL); 952 ASSERT3U(tqs->stqs_count, !=, 0); 953 954 if (tqs->stqs_count == 1) { 955 tq = tqs->stqs_taskq[0]; 956 } else { 957#ifdef _KERNEL 958 tq = tqs->stqs_taskq[cpu_ticks() % tqs->stqs_count]; 959#else 960 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 961#endif 962 } 963 964 taskq_dispatch_ent(tq, func, arg, flags, ent); 965} 966 967static void 968spa_create_zio_taskqs(spa_t *spa) 969{ 970 for (int t = 0; t < ZIO_TYPES; t++) { 971 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 972 spa_taskqs_init(spa, t, q); 973 } 974 } 975} 976 977#ifdef _KERNEL 978#ifdef SPA_PROCESS 979static void 980spa_thread(void *arg) 981{ 982 callb_cpr_t cprinfo; 983 984 spa_t *spa = arg; 985 user_t *pu = PTOU(curproc); 986 987 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 988 spa->spa_name); 989 990 ASSERT(curproc != &p0); 991 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 992 "zpool-%s", spa->spa_name); 993 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 994 995#ifdef PSRSET_BIND 996 /* bind this thread to the requested psrset */ 997 if (zio_taskq_psrset_bind != PS_NONE) { 998 pool_lock(); 999 mutex_enter(&cpu_lock); 1000 mutex_enter(&pidlock); 1001 mutex_enter(&curproc->p_lock); 1002 1003 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 1004 0, NULL, NULL) == 0) { 1005 curthread->t_bind_pset = zio_taskq_psrset_bind; 1006 } else { 1007 cmn_err(CE_WARN, 1008 "Couldn't bind process for zfs pool \"%s\" to " 1009 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1010 } 1011 1012 mutex_exit(&curproc->p_lock); 1013 mutex_exit(&pidlock); 1014 mutex_exit(&cpu_lock); 1015 pool_unlock(); 1016 } 1017#endif 1018 1019#ifdef SYSDC 1020 if (zio_taskq_sysdc) { 1021 sysdc_thread_enter(curthread, 100, 0); 1022 } 1023#endif 1024 1025 spa->spa_proc = curproc; 1026 spa->spa_did = curthread->t_did; 1027 1028 spa_create_zio_taskqs(spa); 1029 1030 mutex_enter(&spa->spa_proc_lock); 1031 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1032 1033 spa->spa_proc_state = SPA_PROC_ACTIVE; 1034 cv_broadcast(&spa->spa_proc_cv); 1035 1036 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1037 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1038 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1039 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1040 1041 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1042 spa->spa_proc_state = SPA_PROC_GONE; 1043 spa->spa_proc = &p0; 1044 cv_broadcast(&spa->spa_proc_cv); 1045 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1046 1047 mutex_enter(&curproc->p_lock); 1048 lwp_exit(); 1049} 1050#endif /* SPA_PROCESS */ 1051#endif 1052 1053/* 1054 * Activate an uninitialized pool. 1055 */ 1056static void 1057spa_activate(spa_t *spa, int mode) 1058{ 1059 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1060 1061 spa->spa_state = POOL_STATE_ACTIVE; 1062 spa->spa_mode = mode; 1063 1064 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1065 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1066 1067 /* Try to create a covering process */ 1068 mutex_enter(&spa->spa_proc_lock); 1069 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1070 ASSERT(spa->spa_proc == &p0); 1071 spa->spa_did = 0; 1072 1073#ifdef SPA_PROCESS 1074 /* Only create a process if we're going to be around a while. */ 1075 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1076 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1077 NULL, 0) == 0) { 1078 spa->spa_proc_state = SPA_PROC_CREATED; 1079 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1080 cv_wait(&spa->spa_proc_cv, 1081 &spa->spa_proc_lock); 1082 } 1083 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1084 ASSERT(spa->spa_proc != &p0); 1085 ASSERT(spa->spa_did != 0); 1086 } else { 1087#ifdef _KERNEL 1088 cmn_err(CE_WARN, 1089 "Couldn't create process for zfs pool \"%s\"\n", 1090 spa->spa_name); 1091#endif 1092 } 1093 } 1094#endif /* SPA_PROCESS */ 1095 mutex_exit(&spa->spa_proc_lock); 1096 1097 /* If we didn't create a process, we need to create our taskqs. */ 1098 ASSERT(spa->spa_proc == &p0); 1099 if (spa->spa_proc == &p0) { 1100 spa_create_zio_taskqs(spa); 1101 } 1102 1103 /* 1104 * Start TRIM thread. 1105 */ 1106 trim_thread_create(spa); 1107 1108 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1109 offsetof(vdev_t, vdev_config_dirty_node)); 1110 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1111 offsetof(vdev_t, vdev_state_dirty_node)); 1112 1113 txg_list_create(&spa->spa_vdev_txg_list, 1114 offsetof(struct vdev, vdev_txg_node)); 1115 1116 avl_create(&spa->spa_errlist_scrub, 1117 spa_error_entry_compare, sizeof (spa_error_entry_t), 1118 offsetof(spa_error_entry_t, se_avl)); 1119 avl_create(&spa->spa_errlist_last, 1120 spa_error_entry_compare, sizeof (spa_error_entry_t), 1121 offsetof(spa_error_entry_t, se_avl)); 1122} 1123 1124/* 1125 * Opposite of spa_activate(). 1126 */ 1127static void 1128spa_deactivate(spa_t *spa) 1129{ 1130 ASSERT(spa->spa_sync_on == B_FALSE); 1131 ASSERT(spa->spa_dsl_pool == NULL); 1132 ASSERT(spa->spa_root_vdev == NULL); 1133 ASSERT(spa->spa_async_zio_root == NULL); 1134 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1135 1136 /* 1137 * Stop TRIM thread in case spa_unload() wasn't called directly 1138 * before spa_deactivate(). 1139 */ 1140 trim_thread_destroy(spa); 1141 1142 txg_list_destroy(&spa->spa_vdev_txg_list); 1143 1144 list_destroy(&spa->spa_config_dirty_list); 1145 list_destroy(&spa->spa_state_dirty_list); 1146 1147 for (int t = 0; t < ZIO_TYPES; t++) { 1148 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1149 spa_taskqs_fini(spa, t, q); 1150 } 1151 } 1152 1153 metaslab_class_destroy(spa->spa_normal_class); 1154 spa->spa_normal_class = NULL; 1155 1156 metaslab_class_destroy(spa->spa_log_class); 1157 spa->spa_log_class = NULL; 1158 1159 /* 1160 * If this was part of an import or the open otherwise failed, we may 1161 * still have errors left in the queues. Empty them just in case. 1162 */ 1163 spa_errlog_drain(spa); 1164 1165 avl_destroy(&spa->spa_errlist_scrub); 1166 avl_destroy(&spa->spa_errlist_last); 1167 1168 spa->spa_state = POOL_STATE_UNINITIALIZED; 1169 1170 mutex_enter(&spa->spa_proc_lock); 1171 if (spa->spa_proc_state != SPA_PROC_NONE) { 1172 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1173 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1174 cv_broadcast(&spa->spa_proc_cv); 1175 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1176 ASSERT(spa->spa_proc != &p0); 1177 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1178 } 1179 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1180 spa->spa_proc_state = SPA_PROC_NONE; 1181 } 1182 ASSERT(spa->spa_proc == &p0); 1183 mutex_exit(&spa->spa_proc_lock); 1184 1185#ifdef SPA_PROCESS 1186 /* 1187 * We want to make sure spa_thread() has actually exited the ZFS 1188 * module, so that the module can't be unloaded out from underneath 1189 * it. 1190 */ 1191 if (spa->spa_did != 0) { 1192 thread_join(spa->spa_did); 1193 spa->spa_did = 0; 1194 } 1195#endif /* SPA_PROCESS */ 1196} 1197 1198/* 1199 * Verify a pool configuration, and construct the vdev tree appropriately. This 1200 * will create all the necessary vdevs in the appropriate layout, with each vdev 1201 * in the CLOSED state. This will prep the pool before open/creation/import. 1202 * All vdev validation is done by the vdev_alloc() routine. 1203 */ 1204static int 1205spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1206 uint_t id, int atype) 1207{ 1208 nvlist_t **child; 1209 uint_t children; 1210 int error; 1211 1212 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1213 return (error); 1214 1215 if ((*vdp)->vdev_ops->vdev_op_leaf) 1216 return (0); 1217 1218 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1219 &child, &children); 1220 1221 if (error == ENOENT) 1222 return (0); 1223 1224 if (error) { 1225 vdev_free(*vdp); 1226 *vdp = NULL; 1227 return (SET_ERROR(EINVAL)); 1228 } 1229 1230 for (int c = 0; c < children; c++) { 1231 vdev_t *vd; 1232 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1233 atype)) != 0) { 1234 vdev_free(*vdp); 1235 *vdp = NULL; 1236 return (error); 1237 } 1238 } 1239 1240 ASSERT(*vdp != NULL); 1241 1242 return (0); 1243} 1244 1245/* 1246 * Opposite of spa_load(). 1247 */ 1248static void 1249spa_unload(spa_t *spa) 1250{ 1251 int i; 1252 1253 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1254 1255 /* 1256 * Stop TRIM thread. 1257 */ 1258 trim_thread_destroy(spa); 1259 1260 /* 1261 * Stop async tasks. 1262 */ 1263 spa_async_suspend(spa); 1264 1265 /* 1266 * Stop syncing. 1267 */ 1268 if (spa->spa_sync_on) { 1269 txg_sync_stop(spa->spa_dsl_pool); 1270 spa->spa_sync_on = B_FALSE; 1271 } 1272 1273 /* 1274 * Wait for any outstanding async I/O to complete. 1275 */ 1276 if (spa->spa_async_zio_root != NULL) { 1277 (void) zio_wait(spa->spa_async_zio_root); 1278 spa->spa_async_zio_root = NULL; 1279 } 1280 1281 bpobj_close(&spa->spa_deferred_bpobj); 1282 1283 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1284 1285 /* 1286 * Close all vdevs. 1287 */ 1288 if (spa->spa_root_vdev) 1289 vdev_free(spa->spa_root_vdev); 1290 ASSERT(spa->spa_root_vdev == NULL); 1291 1292 /* 1293 * Close the dsl pool. 1294 */ 1295 if (spa->spa_dsl_pool) { 1296 dsl_pool_close(spa->spa_dsl_pool); 1297 spa->spa_dsl_pool = NULL; 1298 spa->spa_meta_objset = NULL; 1299 } 1300 1301 ddt_unload(spa); 1302 1303 1304 /* 1305 * Drop and purge level 2 cache 1306 */ 1307 spa_l2cache_drop(spa); 1308 1309 for (i = 0; i < spa->spa_spares.sav_count; i++) 1310 vdev_free(spa->spa_spares.sav_vdevs[i]); 1311 if (spa->spa_spares.sav_vdevs) { 1312 kmem_free(spa->spa_spares.sav_vdevs, 1313 spa->spa_spares.sav_count * sizeof (void *)); 1314 spa->spa_spares.sav_vdevs = NULL; 1315 } 1316 if (spa->spa_spares.sav_config) { 1317 nvlist_free(spa->spa_spares.sav_config); 1318 spa->spa_spares.sav_config = NULL; 1319 } 1320 spa->spa_spares.sav_count = 0; 1321 1322 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1323 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1324 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1325 } 1326 if (spa->spa_l2cache.sav_vdevs) { 1327 kmem_free(spa->spa_l2cache.sav_vdevs, 1328 spa->spa_l2cache.sav_count * sizeof (void *)); 1329 spa->spa_l2cache.sav_vdevs = NULL; 1330 } 1331 if (spa->spa_l2cache.sav_config) { 1332 nvlist_free(spa->spa_l2cache.sav_config); 1333 spa->spa_l2cache.sav_config = NULL; 1334 } 1335 spa->spa_l2cache.sav_count = 0; 1336 1337 spa->spa_async_suspended = 0; 1338 1339 if (spa->spa_comment != NULL) { 1340 spa_strfree(spa->spa_comment); 1341 spa->spa_comment = NULL; 1342 } 1343 1344 spa_config_exit(spa, SCL_ALL, FTAG); 1345} 1346 1347/* 1348 * Load (or re-load) the current list of vdevs describing the active spares for 1349 * this pool. When this is called, we have some form of basic information in 1350 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1351 * then re-generate a more complete list including status information. 1352 */ 1353static void 1354spa_load_spares(spa_t *spa) 1355{ 1356 nvlist_t **spares; 1357 uint_t nspares; 1358 int i; 1359 vdev_t *vd, *tvd; 1360 1361 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1362 1363 /* 1364 * First, close and free any existing spare vdevs. 1365 */ 1366 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1367 vd = spa->spa_spares.sav_vdevs[i]; 1368 1369 /* Undo the call to spa_activate() below */ 1370 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1371 B_FALSE)) != NULL && tvd->vdev_isspare) 1372 spa_spare_remove(tvd); 1373 vdev_close(vd); 1374 vdev_free(vd); 1375 } 1376 1377 if (spa->spa_spares.sav_vdevs) 1378 kmem_free(spa->spa_spares.sav_vdevs, 1379 spa->spa_spares.sav_count * sizeof (void *)); 1380 1381 if (spa->spa_spares.sav_config == NULL) 1382 nspares = 0; 1383 else 1384 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1385 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1386 1387 spa->spa_spares.sav_count = (int)nspares; 1388 spa->spa_spares.sav_vdevs = NULL; 1389 1390 if (nspares == 0) 1391 return; 1392 1393 /* 1394 * Construct the array of vdevs, opening them to get status in the 1395 * process. For each spare, there is potentially two different vdev_t 1396 * structures associated with it: one in the list of spares (used only 1397 * for basic validation purposes) and one in the active vdev 1398 * configuration (if it's spared in). During this phase we open and 1399 * validate each vdev on the spare list. If the vdev also exists in the 1400 * active configuration, then we also mark this vdev as an active spare. 1401 */ 1402 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1403 KM_SLEEP); 1404 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1405 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1406 VDEV_ALLOC_SPARE) == 0); 1407 ASSERT(vd != NULL); 1408 1409 spa->spa_spares.sav_vdevs[i] = vd; 1410 1411 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1412 B_FALSE)) != NULL) { 1413 if (!tvd->vdev_isspare) 1414 spa_spare_add(tvd); 1415 1416 /* 1417 * We only mark the spare active if we were successfully 1418 * able to load the vdev. Otherwise, importing a pool 1419 * with a bad active spare would result in strange 1420 * behavior, because multiple pool would think the spare 1421 * is actively in use. 1422 * 1423 * There is a vulnerability here to an equally bizarre 1424 * circumstance, where a dead active spare is later 1425 * brought back to life (onlined or otherwise). Given 1426 * the rarity of this scenario, and the extra complexity 1427 * it adds, we ignore the possibility. 1428 */ 1429 if (!vdev_is_dead(tvd)) 1430 spa_spare_activate(tvd); 1431 } 1432 1433 vd->vdev_top = vd; 1434 vd->vdev_aux = &spa->spa_spares; 1435 1436 if (vdev_open(vd) != 0) 1437 continue; 1438 1439 if (vdev_validate_aux(vd) == 0) 1440 spa_spare_add(vd); 1441 } 1442 1443 /* 1444 * Recompute the stashed list of spares, with status information 1445 * this time. 1446 */ 1447 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1448 DATA_TYPE_NVLIST_ARRAY) == 0); 1449 1450 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1451 KM_SLEEP); 1452 for (i = 0; i < spa->spa_spares.sav_count; i++) 1453 spares[i] = vdev_config_generate(spa, 1454 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1455 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1456 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1457 for (i = 0; i < spa->spa_spares.sav_count; i++) 1458 nvlist_free(spares[i]); 1459 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1460} 1461 1462/* 1463 * Load (or re-load) the current list of vdevs describing the active l2cache for 1464 * this pool. When this is called, we have some form of basic information in 1465 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1466 * then re-generate a more complete list including status information. 1467 * Devices which are already active have their details maintained, and are 1468 * not re-opened. 1469 */ 1470static void 1471spa_load_l2cache(spa_t *spa) 1472{ 1473 nvlist_t **l2cache; 1474 uint_t nl2cache; 1475 int i, j, oldnvdevs; 1476 uint64_t guid; 1477 vdev_t *vd, **oldvdevs, **newvdevs; 1478 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1479 1480 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1481 1482 if (sav->sav_config != NULL) { 1483 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1484 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1485 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1486 } else { 1487 nl2cache = 0; 1488 newvdevs = NULL; 1489 } 1490 1491 oldvdevs = sav->sav_vdevs; 1492 oldnvdevs = sav->sav_count; 1493 sav->sav_vdevs = NULL; 1494 sav->sav_count = 0; 1495 1496 /* 1497 * Process new nvlist of vdevs. 1498 */ 1499 for (i = 0; i < nl2cache; i++) { 1500 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1501 &guid) == 0); 1502 1503 newvdevs[i] = NULL; 1504 for (j = 0; j < oldnvdevs; j++) { 1505 vd = oldvdevs[j]; 1506 if (vd != NULL && guid == vd->vdev_guid) { 1507 /* 1508 * Retain previous vdev for add/remove ops. 1509 */ 1510 newvdevs[i] = vd; 1511 oldvdevs[j] = NULL; 1512 break; 1513 } 1514 } 1515 1516 if (newvdevs[i] == NULL) { 1517 /* 1518 * Create new vdev 1519 */ 1520 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1521 VDEV_ALLOC_L2CACHE) == 0); 1522 ASSERT(vd != NULL); 1523 newvdevs[i] = vd; 1524 1525 /* 1526 * Commit this vdev as an l2cache device, 1527 * even if it fails to open. 1528 */ 1529 spa_l2cache_add(vd); 1530 1531 vd->vdev_top = vd; 1532 vd->vdev_aux = sav; 1533 1534 spa_l2cache_activate(vd); 1535 1536 if (vdev_open(vd) != 0) 1537 continue; 1538 1539 (void) vdev_validate_aux(vd); 1540 1541 if (!vdev_is_dead(vd)) 1542 l2arc_add_vdev(spa, vd); 1543 } 1544 } 1545 1546 /* 1547 * Purge vdevs that were dropped 1548 */ 1549 for (i = 0; i < oldnvdevs; i++) { 1550 uint64_t pool; 1551 1552 vd = oldvdevs[i]; 1553 if (vd != NULL) { 1554 ASSERT(vd->vdev_isl2cache); 1555 1556 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1557 pool != 0ULL && l2arc_vdev_present(vd)) 1558 l2arc_remove_vdev(vd); 1559 vdev_clear_stats(vd); 1560 vdev_free(vd); 1561 } 1562 } 1563 1564 if (oldvdevs) 1565 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1566 1567 if (sav->sav_config == NULL) 1568 goto out; 1569 1570 sav->sav_vdevs = newvdevs; 1571 sav->sav_count = (int)nl2cache; 1572 1573 /* 1574 * Recompute the stashed list of l2cache devices, with status 1575 * information this time. 1576 */ 1577 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1578 DATA_TYPE_NVLIST_ARRAY) == 0); 1579 1580 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1581 for (i = 0; i < sav->sav_count; i++) 1582 l2cache[i] = vdev_config_generate(spa, 1583 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1584 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1585 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1586out: 1587 for (i = 0; i < sav->sav_count; i++) 1588 nvlist_free(l2cache[i]); 1589 if (sav->sav_count) 1590 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1591} 1592 1593static int 1594load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1595{ 1596 dmu_buf_t *db; 1597 char *packed = NULL; 1598 size_t nvsize = 0; 1599 int error; 1600 *value = NULL; 1601 1602 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1603 if (error != 0) 1604 return (error); 1605 nvsize = *(uint64_t *)db->db_data; 1606 dmu_buf_rele(db, FTAG); 1607 1608 packed = kmem_alloc(nvsize, KM_SLEEP); 1609 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1610 DMU_READ_PREFETCH); 1611 if (error == 0) 1612 error = nvlist_unpack(packed, nvsize, value, 0); 1613 kmem_free(packed, nvsize); 1614 1615 return (error); 1616} 1617 1618/* 1619 * Checks to see if the given vdev could not be opened, in which case we post a 1620 * sysevent to notify the autoreplace code that the device has been removed. 1621 */ 1622static void 1623spa_check_removed(vdev_t *vd) 1624{ 1625 for (int c = 0; c < vd->vdev_children; c++) 1626 spa_check_removed(vd->vdev_child[c]); 1627 1628 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1629 !vd->vdev_ishole) { 1630 zfs_post_autoreplace(vd->vdev_spa, vd); 1631 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); 1632 } 1633} 1634 1635/* 1636 * Validate the current config against the MOS config 1637 */ 1638static boolean_t 1639spa_config_valid(spa_t *spa, nvlist_t *config) 1640{ 1641 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 1642 nvlist_t *nv; 1643 1644 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); 1645 1646 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1647 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 1648 1649 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); 1650 1651 /* 1652 * If we're doing a normal import, then build up any additional 1653 * diagnostic information about missing devices in this config. 1654 * We'll pass this up to the user for further processing. 1655 */ 1656 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1657 nvlist_t **child, *nv; 1658 uint64_t idx = 0; 1659 1660 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1661 KM_SLEEP); 1662 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1663 1664 for (int c = 0; c < rvd->vdev_children; c++) { 1665 vdev_t *tvd = rvd->vdev_child[c]; 1666 vdev_t *mtvd = mrvd->vdev_child[c]; 1667 1668 if (tvd->vdev_ops == &vdev_missing_ops && 1669 mtvd->vdev_ops != &vdev_missing_ops && 1670 mtvd->vdev_islog) 1671 child[idx++] = vdev_config_generate(spa, mtvd, 1672 B_FALSE, 0); 1673 } 1674 1675 if (idx) { 1676 VERIFY(nvlist_add_nvlist_array(nv, 1677 ZPOOL_CONFIG_CHILDREN, child, idx) == 0); 1678 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 1679 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); 1680 1681 for (int i = 0; i < idx; i++) 1682 nvlist_free(child[i]); 1683 } 1684 nvlist_free(nv); 1685 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1686 } 1687 1688 /* 1689 * Compare the root vdev tree with the information we have 1690 * from the MOS config (mrvd). Check each top-level vdev 1691 * with the corresponding MOS config top-level (mtvd). 1692 */ 1693 for (int c = 0; c < rvd->vdev_children; c++) { 1694 vdev_t *tvd = rvd->vdev_child[c]; 1695 vdev_t *mtvd = mrvd->vdev_child[c]; 1696 1697 /* 1698 * Resolve any "missing" vdevs in the current configuration. 1699 * If we find that the MOS config has more accurate information 1700 * about the top-level vdev then use that vdev instead. 1701 */ 1702 if (tvd->vdev_ops == &vdev_missing_ops && 1703 mtvd->vdev_ops != &vdev_missing_ops) { 1704 1705 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) 1706 continue; 1707 1708 /* 1709 * Device specific actions. 1710 */ 1711 if (mtvd->vdev_islog) { 1712 spa_set_log_state(spa, SPA_LOG_CLEAR); 1713 } else { 1714 /* 1715 * XXX - once we have 'readonly' pool 1716 * support we should be able to handle 1717 * missing data devices by transitioning 1718 * the pool to readonly. 1719 */ 1720 continue; 1721 } 1722 1723 /* 1724 * Swap the missing vdev with the data we were 1725 * able to obtain from the MOS config. 1726 */ 1727 vdev_remove_child(rvd, tvd); 1728 vdev_remove_child(mrvd, mtvd); 1729 1730 vdev_add_child(rvd, mtvd); 1731 vdev_add_child(mrvd, tvd); 1732 1733 spa_config_exit(spa, SCL_ALL, FTAG); 1734 vdev_load(mtvd); 1735 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1736 1737 vdev_reopen(rvd); 1738 } else if (mtvd->vdev_islog) { 1739 /* 1740 * Load the slog device's state from the MOS config 1741 * since it's possible that the label does not 1742 * contain the most up-to-date information. 1743 */ 1744 vdev_load_log_state(tvd, mtvd); 1745 vdev_reopen(tvd); 1746 } 1747 } 1748 vdev_free(mrvd); 1749 spa_config_exit(spa, SCL_ALL, FTAG); 1750 1751 /* 1752 * Ensure we were able to validate the config. 1753 */ 1754 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); 1755} 1756 1757/* 1758 * Check for missing log devices 1759 */ 1760static boolean_t 1761spa_check_logs(spa_t *spa) 1762{ 1763 boolean_t rv = B_FALSE; 1764 1765 switch (spa->spa_log_state) { 1766 case SPA_LOG_MISSING: 1767 /* need to recheck in case slog has been restored */ 1768 case SPA_LOG_UNKNOWN: 1769 rv = (dmu_objset_find(spa->spa_name, zil_check_log_chain, 1770 NULL, DS_FIND_CHILDREN) != 0); 1771 if (rv) 1772 spa_set_log_state(spa, SPA_LOG_MISSING); 1773 break; 1774 } 1775 return (rv); 1776} 1777 1778static boolean_t 1779spa_passivate_log(spa_t *spa) 1780{ 1781 vdev_t *rvd = spa->spa_root_vdev; 1782 boolean_t slog_found = B_FALSE; 1783 1784 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1785 1786 if (!spa_has_slogs(spa)) 1787 return (B_FALSE); 1788 1789 for (int c = 0; c < rvd->vdev_children; c++) { 1790 vdev_t *tvd = rvd->vdev_child[c]; 1791 metaslab_group_t *mg = tvd->vdev_mg; 1792 1793 if (tvd->vdev_islog) { 1794 metaslab_group_passivate(mg); 1795 slog_found = B_TRUE; 1796 } 1797 } 1798 1799 return (slog_found); 1800} 1801 1802static void 1803spa_activate_log(spa_t *spa) 1804{ 1805 vdev_t *rvd = spa->spa_root_vdev; 1806 1807 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1808 1809 for (int c = 0; c < rvd->vdev_children; c++) { 1810 vdev_t *tvd = rvd->vdev_child[c]; 1811 metaslab_group_t *mg = tvd->vdev_mg; 1812 1813 if (tvd->vdev_islog) 1814 metaslab_group_activate(mg); 1815 } 1816} 1817 1818int 1819spa_offline_log(spa_t *spa) 1820{ 1821 int error; 1822 1823 error = dmu_objset_find(spa_name(spa), zil_vdev_offline, 1824 NULL, DS_FIND_CHILDREN); 1825 if (error == 0) { 1826 /* 1827 * We successfully offlined the log device, sync out the 1828 * current txg so that the "stubby" block can be removed 1829 * by zil_sync(). 1830 */ 1831 txg_wait_synced(spa->spa_dsl_pool, 0); 1832 } 1833 return (error); 1834} 1835 1836static void 1837spa_aux_check_removed(spa_aux_vdev_t *sav) 1838{ 1839 int i; 1840 1841 for (i = 0; i < sav->sav_count; i++) 1842 spa_check_removed(sav->sav_vdevs[i]); 1843} 1844 1845void 1846spa_claim_notify(zio_t *zio) 1847{ 1848 spa_t *spa = zio->io_spa; 1849 1850 if (zio->io_error) 1851 return; 1852 1853 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1854 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1855 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1856 mutex_exit(&spa->spa_props_lock); 1857} 1858 1859typedef struct spa_load_error { 1860 uint64_t sle_meta_count; 1861 uint64_t sle_data_count; 1862} spa_load_error_t; 1863 1864static void 1865spa_load_verify_done(zio_t *zio) 1866{ 1867 blkptr_t *bp = zio->io_bp; 1868 spa_load_error_t *sle = zio->io_private; 1869 dmu_object_type_t type = BP_GET_TYPE(bp); 1870 int error = zio->io_error; 1871 spa_t *spa = zio->io_spa; 1872 1873 if (error) { 1874 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 1875 type != DMU_OT_INTENT_LOG) 1876 atomic_add_64(&sle->sle_meta_count, 1); 1877 else 1878 atomic_add_64(&sle->sle_data_count, 1); 1879 } 1880 zio_data_buf_free(zio->io_data, zio->io_size); 1881 1882 mutex_enter(&spa->spa_scrub_lock); 1883 spa->spa_scrub_inflight--; 1884 cv_broadcast(&spa->spa_scrub_io_cv); 1885 mutex_exit(&spa->spa_scrub_lock); 1886} 1887 1888/* 1889 * Maximum number of concurrent scrub i/os to create while verifying 1890 * a pool while importing it. 1891 */ 1892int spa_load_verify_maxinflight = 10000; 1893boolean_t spa_load_verify_metadata = B_TRUE; 1894boolean_t spa_load_verify_data = B_TRUE; 1895 1896SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_maxinflight, CTLFLAG_RWTUN, 1897 &spa_load_verify_maxinflight, 0, 1898 "Maximum number of concurrent scrub I/Os to create while verifying a " 1899 "pool while importing it"); 1900 1901SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_metadata, CTLFLAG_RWTUN, 1902 &spa_load_verify_metadata, 0, 1903 "Check metadata on import?"); 1904 1905SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_data, CTLFLAG_RWTUN, 1906 &spa_load_verify_data, 0, 1907 "Check user data on import?"); 1908 1909/*ARGSUSED*/ 1910static int 1911spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1912 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 1913{ 1914 if (BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp)) 1915 return (0); 1916 /* 1917 * Note: normally this routine will not be called if 1918 * spa_load_verify_metadata is not set. However, it may be useful 1919 * to manually set the flag after the traversal has begun. 1920 */ 1921 if (!spa_load_verify_metadata) 1922 return (0); 1923 if (BP_GET_BUFC_TYPE(bp) == ARC_BUFC_DATA && !spa_load_verify_data) 1924 return (0); 1925 1926 zio_t *rio = arg; 1927 size_t size = BP_GET_PSIZE(bp); 1928 void *data = zio_data_buf_alloc(size); 1929 1930 mutex_enter(&spa->spa_scrub_lock); 1931 while (spa->spa_scrub_inflight >= spa_load_verify_maxinflight) 1932 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); 1933 spa->spa_scrub_inflight++; 1934 mutex_exit(&spa->spa_scrub_lock); 1935 1936 zio_nowait(zio_read(rio, spa, bp, data, size, 1937 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 1938 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 1939 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 1940 return (0); 1941} 1942 1943static int 1944spa_load_verify(spa_t *spa) 1945{ 1946 zio_t *rio; 1947 spa_load_error_t sle = { 0 }; 1948 zpool_rewind_policy_t policy; 1949 boolean_t verify_ok = B_FALSE; 1950 int error = 0; 1951 1952 zpool_get_rewind_policy(spa->spa_config, &policy); 1953 1954 if (policy.zrp_request & ZPOOL_NEVER_REWIND) 1955 return (0); 1956 1957 rio = zio_root(spa, NULL, &sle, 1958 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1959 1960 if (spa_load_verify_metadata) { 1961 error = traverse_pool(spa, spa->spa_verify_min_txg, 1962 TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA, 1963 spa_load_verify_cb, rio); 1964 } 1965 1966 (void) zio_wait(rio); 1967 1968 spa->spa_load_meta_errors = sle.sle_meta_count; 1969 spa->spa_load_data_errors = sle.sle_data_count; 1970 1971 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && 1972 sle.sle_data_count <= policy.zrp_maxdata) { 1973 int64_t loss = 0; 1974 1975 verify_ok = B_TRUE; 1976 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 1977 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 1978 1979 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 1980 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1981 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 1982 VERIFY(nvlist_add_int64(spa->spa_load_info, 1983 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 1984 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1985 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 1986 } else { 1987 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 1988 } 1989 1990 if (error) { 1991 if (error != ENXIO && error != EIO) 1992 error = SET_ERROR(EIO); 1993 return (error); 1994 } 1995 1996 return (verify_ok ? 0 : EIO); 1997} 1998 1999/* 2000 * Find a value in the pool props object. 2001 */ 2002static void 2003spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 2004{ 2005 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 2006 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 2007} 2008 2009/* 2010 * Find a value in the pool directory object. 2011 */ 2012static int 2013spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) 2014{ 2015 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 2016 name, sizeof (uint64_t), 1, val)); 2017} 2018 2019static int 2020spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 2021{ 2022 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 2023 return (err); 2024} 2025 2026/* 2027 * Fix up config after a partly-completed split. This is done with the 2028 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 2029 * pool have that entry in their config, but only the splitting one contains 2030 * a list of all the guids of the vdevs that are being split off. 2031 * 2032 * This function determines what to do with that list: either rejoin 2033 * all the disks to the pool, or complete the splitting process. To attempt 2034 * the rejoin, each disk that is offlined is marked online again, and 2035 * we do a reopen() call. If the vdev label for every disk that was 2036 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 2037 * then we call vdev_split() on each disk, and complete the split. 2038 * 2039 * Otherwise we leave the config alone, with all the vdevs in place in 2040 * the original pool. 2041 */ 2042static void 2043spa_try_repair(spa_t *spa, nvlist_t *config) 2044{ 2045 uint_t extracted; 2046 uint64_t *glist; 2047 uint_t i, gcount; 2048 nvlist_t *nvl; 2049 vdev_t **vd; 2050 boolean_t attempt_reopen; 2051 2052 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2053 return; 2054 2055 /* check that the config is complete */ 2056 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2057 &glist, &gcount) != 0) 2058 return; 2059 2060 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2061 2062 /* attempt to online all the vdevs & validate */ 2063 attempt_reopen = B_TRUE; 2064 for (i = 0; i < gcount; i++) { 2065 if (glist[i] == 0) /* vdev is hole */ 2066 continue; 2067 2068 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2069 if (vd[i] == NULL) { 2070 /* 2071 * Don't bother attempting to reopen the disks; 2072 * just do the split. 2073 */ 2074 attempt_reopen = B_FALSE; 2075 } else { 2076 /* attempt to re-online it */ 2077 vd[i]->vdev_offline = B_FALSE; 2078 } 2079 } 2080 2081 if (attempt_reopen) { 2082 vdev_reopen(spa->spa_root_vdev); 2083 2084 /* check each device to see what state it's in */ 2085 for (extracted = 0, i = 0; i < gcount; i++) { 2086 if (vd[i] != NULL && 2087 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2088 break; 2089 ++extracted; 2090 } 2091 } 2092 2093 /* 2094 * If every disk has been moved to the new pool, or if we never 2095 * even attempted to look at them, then we split them off for 2096 * good. 2097 */ 2098 if (!attempt_reopen || gcount == extracted) { 2099 for (i = 0; i < gcount; i++) 2100 if (vd[i] != NULL) 2101 vdev_split(vd[i]); 2102 vdev_reopen(spa->spa_root_vdev); 2103 } 2104 2105 kmem_free(vd, gcount * sizeof (vdev_t *)); 2106} 2107 2108static int 2109spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, 2110 boolean_t mosconfig) 2111{ 2112 nvlist_t *config = spa->spa_config; 2113 char *ereport = FM_EREPORT_ZFS_POOL; 2114 char *comment; 2115 int error; 2116 uint64_t pool_guid; 2117 nvlist_t *nvl; 2118 2119 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) 2120 return (SET_ERROR(EINVAL)); 2121 2122 ASSERT(spa->spa_comment == NULL); 2123 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2124 spa->spa_comment = spa_strdup(comment); 2125 2126 /* 2127 * Versioning wasn't explicitly added to the label until later, so if 2128 * it's not present treat it as the initial version. 2129 */ 2130 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2131 &spa->spa_ubsync.ub_version) != 0) 2132 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2133 2134 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2135 &spa->spa_config_txg); 2136 2137 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && 2138 spa_guid_exists(pool_guid, 0)) { 2139 error = SET_ERROR(EEXIST); 2140 } else { 2141 spa->spa_config_guid = pool_guid; 2142 2143 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, 2144 &nvl) == 0) { 2145 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, 2146 KM_SLEEP) == 0); 2147 } 2148 2149 nvlist_free(spa->spa_load_info); 2150 spa->spa_load_info = fnvlist_alloc(); 2151 2152 gethrestime(&spa->spa_loaded_ts); 2153 error = spa_load_impl(spa, pool_guid, config, state, type, 2154 mosconfig, &ereport); 2155 } 2156 2157 spa->spa_minref = refcount_count(&spa->spa_refcount); 2158 if (error) { 2159 if (error != EEXIST) { 2160 spa->spa_loaded_ts.tv_sec = 0; 2161 spa->spa_loaded_ts.tv_nsec = 0; 2162 } 2163 if (error != EBADF) { 2164 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); 2165 } 2166 } 2167 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2168 spa->spa_ena = 0; 2169 2170 return (error); 2171} 2172 2173/* 2174 * Load an existing storage pool, using the pool's builtin spa_config as a 2175 * source of configuration information. 2176 */ 2177static int 2178spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, 2179 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 2180 char **ereport) 2181{ 2182 int error = 0; 2183 nvlist_t *nvroot = NULL; 2184 nvlist_t *label; 2185 vdev_t *rvd; 2186 uberblock_t *ub = &spa->spa_uberblock; 2187 uint64_t children, config_cache_txg = spa->spa_config_txg; 2188 int orig_mode = spa->spa_mode; 2189 int parse; 2190 uint64_t obj; 2191 boolean_t missing_feat_write = B_FALSE; 2192 2193 /* 2194 * If this is an untrusted config, access the pool in read-only mode. 2195 * This prevents things like resilvering recently removed devices. 2196 */ 2197 if (!mosconfig) 2198 spa->spa_mode = FREAD; 2199 2200 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2201 2202 spa->spa_load_state = state; 2203 2204 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) 2205 return (SET_ERROR(EINVAL)); 2206 2207 parse = (type == SPA_IMPORT_EXISTING ? 2208 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2209 2210 /* 2211 * Create "The Godfather" zio to hold all async IOs 2212 */ 2213 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 2214 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 2215 2216 /* 2217 * Parse the configuration into a vdev tree. We explicitly set the 2218 * value that will be returned by spa_version() since parsing the 2219 * configuration requires knowing the version number. 2220 */ 2221 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2222 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); 2223 spa_config_exit(spa, SCL_ALL, FTAG); 2224 2225 if (error != 0) 2226 return (error); 2227 2228 ASSERT(spa->spa_root_vdev == rvd); 2229 2230 if (type != SPA_IMPORT_ASSEMBLE) { 2231 ASSERT(spa_guid(spa) == pool_guid); 2232 } 2233 2234 /* 2235 * Try to open all vdevs, loading each label in the process. 2236 */ 2237 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2238 error = vdev_open(rvd); 2239 spa_config_exit(spa, SCL_ALL, FTAG); 2240 if (error != 0) 2241 return (error); 2242 2243 /* 2244 * We need to validate the vdev labels against the configuration that 2245 * we have in hand, which is dependent on the setting of mosconfig. If 2246 * mosconfig is true then we're validating the vdev labels based on 2247 * that config. Otherwise, we're validating against the cached config 2248 * (zpool.cache) that was read when we loaded the zfs module, and then 2249 * later we will recursively call spa_load() and validate against 2250 * the vdev config. 2251 * 2252 * If we're assembling a new pool that's been split off from an 2253 * existing pool, the labels haven't yet been updated so we skip 2254 * validation for now. 2255 */ 2256 if (type != SPA_IMPORT_ASSEMBLE) { 2257 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2258 error = vdev_validate(rvd, mosconfig); 2259 spa_config_exit(spa, SCL_ALL, FTAG); 2260 2261 if (error != 0) 2262 return (error); 2263 2264 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2265 return (SET_ERROR(ENXIO)); 2266 } 2267 2268 /* 2269 * Find the best uberblock. 2270 */ 2271 vdev_uberblock_load(rvd, ub, &label); 2272 2273 /* 2274 * If we weren't able to find a single valid uberblock, return failure. 2275 */ 2276 if (ub->ub_txg == 0) { 2277 nvlist_free(label); 2278 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2279 } 2280 2281 /* 2282 * If the pool has an unsupported version we can't open it. 2283 */ 2284 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2285 nvlist_free(label); 2286 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2287 } 2288 2289 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2290 nvlist_t *features; 2291 2292 /* 2293 * If we weren't able to find what's necessary for reading the 2294 * MOS in the label, return failure. 2295 */ 2296 if (label == NULL || nvlist_lookup_nvlist(label, 2297 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { 2298 nvlist_free(label); 2299 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2300 ENXIO)); 2301 } 2302 2303 /* 2304 * Update our in-core representation with the definitive values 2305 * from the label. 2306 */ 2307 nvlist_free(spa->spa_label_features); 2308 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2309 } 2310 2311 nvlist_free(label); 2312 2313 /* 2314 * Look through entries in the label nvlist's features_for_read. If 2315 * there is a feature listed there which we don't understand then we 2316 * cannot open a pool. 2317 */ 2318 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2319 nvlist_t *unsup_feat; 2320 2321 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2322 0); 2323 2324 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2325 NULL); nvp != NULL; 2326 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2327 if (!zfeature_is_supported(nvpair_name(nvp))) { 2328 VERIFY(nvlist_add_string(unsup_feat, 2329 nvpair_name(nvp), "") == 0); 2330 } 2331 } 2332 2333 if (!nvlist_empty(unsup_feat)) { 2334 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2335 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2336 nvlist_free(unsup_feat); 2337 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2338 ENOTSUP)); 2339 } 2340 2341 nvlist_free(unsup_feat); 2342 } 2343 2344 /* 2345 * If the vdev guid sum doesn't match the uberblock, we have an 2346 * incomplete configuration. We first check to see if the pool 2347 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). 2348 * If it is, defer the vdev_guid_sum check till later so we 2349 * can handle missing vdevs. 2350 */ 2351 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, 2352 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && 2353 rvd->vdev_guid_sum != ub->ub_guid_sum) 2354 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 2355 2356 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2357 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2358 spa_try_repair(spa, config); 2359 spa_config_exit(spa, SCL_ALL, FTAG); 2360 nvlist_free(spa->spa_config_splitting); 2361 spa->spa_config_splitting = NULL; 2362 } 2363 2364 /* 2365 * Initialize internal SPA structures. 2366 */ 2367 spa->spa_state = POOL_STATE_ACTIVE; 2368 spa->spa_ubsync = spa->spa_uberblock; 2369 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2370 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2371 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2372 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2373 spa->spa_claim_max_txg = spa->spa_first_txg; 2374 spa->spa_prev_software_version = ub->ub_software_version; 2375 2376 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2377 if (error) 2378 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2379 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2380 2381 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) 2382 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2383 2384 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 2385 boolean_t missing_feat_read = B_FALSE; 2386 nvlist_t *unsup_feat, *enabled_feat; 2387 2388 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 2389 &spa->spa_feat_for_read_obj) != 0) { 2390 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2391 } 2392 2393 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 2394 &spa->spa_feat_for_write_obj) != 0) { 2395 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2396 } 2397 2398 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 2399 &spa->spa_feat_desc_obj) != 0) { 2400 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2401 } 2402 2403 enabled_feat = fnvlist_alloc(); 2404 unsup_feat = fnvlist_alloc(); 2405 2406 if (!spa_features_check(spa, B_FALSE, 2407 unsup_feat, enabled_feat)) 2408 missing_feat_read = B_TRUE; 2409 2410 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { 2411 if (!spa_features_check(spa, B_TRUE, 2412 unsup_feat, enabled_feat)) { 2413 missing_feat_write = B_TRUE; 2414 } 2415 } 2416 2417 fnvlist_add_nvlist(spa->spa_load_info, 2418 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 2419 2420 if (!nvlist_empty(unsup_feat)) { 2421 fnvlist_add_nvlist(spa->spa_load_info, 2422 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 2423 } 2424 2425 fnvlist_free(enabled_feat); 2426 fnvlist_free(unsup_feat); 2427 2428 if (!missing_feat_read) { 2429 fnvlist_add_boolean(spa->spa_load_info, 2430 ZPOOL_CONFIG_CAN_RDONLY); 2431 } 2432 2433 /* 2434 * If the state is SPA_LOAD_TRYIMPORT, our objective is 2435 * twofold: to determine whether the pool is available for 2436 * import in read-write mode and (if it is not) whether the 2437 * pool is available for import in read-only mode. If the pool 2438 * is available for import in read-write mode, it is displayed 2439 * as available in userland; if it is not available for import 2440 * in read-only mode, it is displayed as unavailable in 2441 * userland. If the pool is available for import in read-only 2442 * mode but not read-write mode, it is displayed as unavailable 2443 * in userland with a special note that the pool is actually 2444 * available for open in read-only mode. 2445 * 2446 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 2447 * missing a feature for write, we must first determine whether 2448 * the pool can be opened read-only before returning to 2449 * userland in order to know whether to display the 2450 * abovementioned note. 2451 */ 2452 if (missing_feat_read || (missing_feat_write && 2453 spa_writeable(spa))) { 2454 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2455 ENOTSUP)); 2456 } 2457 2458 /* 2459 * Load refcounts for ZFS features from disk into an in-memory 2460 * cache during SPA initialization. 2461 */ 2462 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 2463 uint64_t refcount; 2464 2465 error = feature_get_refcount_from_disk(spa, 2466 &spa_feature_table[i], &refcount); 2467 if (error == 0) { 2468 spa->spa_feat_refcount_cache[i] = refcount; 2469 } else if (error == ENOTSUP) { 2470 spa->spa_feat_refcount_cache[i] = 2471 SPA_FEATURE_DISABLED; 2472 } else { 2473 return (spa_vdev_err(rvd, 2474 VDEV_AUX_CORRUPT_DATA, EIO)); 2475 } 2476 } 2477 } 2478 2479 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { 2480 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, 2481 &spa->spa_feat_enabled_txg_obj) != 0) 2482 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2483 } 2484 2485 spa->spa_is_initializing = B_TRUE; 2486 error = dsl_pool_open(spa->spa_dsl_pool); 2487 spa->spa_is_initializing = B_FALSE; 2488 if (error != 0) 2489 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2490 2491 if (!mosconfig) { 2492 uint64_t hostid; 2493 nvlist_t *policy = NULL, *nvconfig; 2494 2495 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2496 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2497 2498 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, 2499 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2500 char *hostname; 2501 unsigned long myhostid = 0; 2502 2503 VERIFY(nvlist_lookup_string(nvconfig, 2504 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); 2505 2506#ifdef _KERNEL 2507 myhostid = zone_get_hostid(NULL); 2508#else /* _KERNEL */ 2509 /* 2510 * We're emulating the system's hostid in userland, so 2511 * we can't use zone_get_hostid(). 2512 */ 2513 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); 2514#endif /* _KERNEL */ 2515 if (check_hostid && hostid != 0 && myhostid != 0 && 2516 hostid != myhostid) { 2517 nvlist_free(nvconfig); 2518 cmn_err(CE_WARN, "pool '%s' could not be " 2519 "loaded as it was last accessed by " 2520 "another system (host: %s hostid: 0x%lx). " 2521 "See: http://illumos.org/msg/ZFS-8000-EY", 2522 spa_name(spa), hostname, 2523 (unsigned long)hostid); 2524 return (SET_ERROR(EBADF)); 2525 } 2526 } 2527 if (nvlist_lookup_nvlist(spa->spa_config, 2528 ZPOOL_REWIND_POLICY, &policy) == 0) 2529 VERIFY(nvlist_add_nvlist(nvconfig, 2530 ZPOOL_REWIND_POLICY, policy) == 0); 2531 2532 spa_config_set(spa, nvconfig); 2533 spa_unload(spa); 2534 spa_deactivate(spa); 2535 spa_activate(spa, orig_mode); 2536 2537 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); 2538 } 2539 2540 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) 2541 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2542 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 2543 if (error != 0) 2544 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2545 2546 /* 2547 * Load the bit that tells us to use the new accounting function 2548 * (raid-z deflation). If we have an older pool, this will not 2549 * be present. 2550 */ 2551 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); 2552 if (error != 0 && error != ENOENT) 2553 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2554 2555 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 2556 &spa->spa_creation_version); 2557 if (error != 0 && error != ENOENT) 2558 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2559 2560 /* 2561 * Load the persistent error log. If we have an older pool, this will 2562 * not be present. 2563 */ 2564 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); 2565 if (error != 0 && error != ENOENT) 2566 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2567 2568 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 2569 &spa->spa_errlog_scrub); 2570 if (error != 0 && error != ENOENT) 2571 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2572 2573 /* 2574 * Load the history object. If we have an older pool, this 2575 * will not be present. 2576 */ 2577 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); 2578 if (error != 0 && error != ENOENT) 2579 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2580 2581 /* 2582 * If we're assembling the pool from the split-off vdevs of 2583 * an existing pool, we don't want to attach the spares & cache 2584 * devices. 2585 */ 2586 2587 /* 2588 * Load any hot spares for this pool. 2589 */ 2590 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); 2591 if (error != 0 && error != ENOENT) 2592 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2593 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2594 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 2595 if (load_nvlist(spa, spa->spa_spares.sav_object, 2596 &spa->spa_spares.sav_config) != 0) 2597 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2598 2599 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2600 spa_load_spares(spa); 2601 spa_config_exit(spa, SCL_ALL, FTAG); 2602 } else if (error == 0) { 2603 spa->spa_spares.sav_sync = B_TRUE; 2604 } 2605 2606 /* 2607 * Load any level 2 ARC devices for this pool. 2608 */ 2609 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 2610 &spa->spa_l2cache.sav_object); 2611 if (error != 0 && error != ENOENT) 2612 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2613 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2614 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 2615 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 2616 &spa->spa_l2cache.sav_config) != 0) 2617 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2618 2619 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2620 spa_load_l2cache(spa); 2621 spa_config_exit(spa, SCL_ALL, FTAG); 2622 } else if (error == 0) { 2623 spa->spa_l2cache.sav_sync = B_TRUE; 2624 } 2625 2626 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 2627 2628 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); 2629 if (error && error != ENOENT) 2630 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2631 2632 if (error == 0) { 2633 uint64_t autoreplace; 2634 2635 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 2636 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 2637 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 2638 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 2639 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 2640 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 2641 &spa->spa_dedup_ditto); 2642 2643 spa->spa_autoreplace = (autoreplace != 0); 2644 } 2645 2646 /* 2647 * If the 'autoreplace' property is set, then post a resource notifying 2648 * the ZFS DE that it should not issue any faults for unopenable 2649 * devices. We also iterate over the vdevs, and post a sysevent for any 2650 * unopenable vdevs so that the normal autoreplace handler can take 2651 * over. 2652 */ 2653 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { 2654 spa_check_removed(spa->spa_root_vdev); 2655 /* 2656 * For the import case, this is done in spa_import(), because 2657 * at this point we're using the spare definitions from 2658 * the MOS config, not necessarily from the userland config. 2659 */ 2660 if (state != SPA_LOAD_IMPORT) { 2661 spa_aux_check_removed(&spa->spa_spares); 2662 spa_aux_check_removed(&spa->spa_l2cache); 2663 } 2664 } 2665 2666 /* 2667 * Load the vdev state for all toplevel vdevs. 2668 */ 2669 vdev_load(rvd); 2670 2671 /* 2672 * Propagate the leaf DTLs we just loaded all the way up the tree. 2673 */ 2674 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2675 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 2676 spa_config_exit(spa, SCL_ALL, FTAG); 2677 2678 /* 2679 * Load the DDTs (dedup tables). 2680 */ 2681 error = ddt_load(spa); 2682 if (error != 0) 2683 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2684 2685 spa_update_dspace(spa); 2686 2687 /* 2688 * Validate the config, using the MOS config to fill in any 2689 * information which might be missing. If we fail to validate 2690 * the config then declare the pool unfit for use. If we're 2691 * assembling a pool from a split, the log is not transferred 2692 * over. 2693 */ 2694 if (type != SPA_IMPORT_ASSEMBLE) { 2695 nvlist_t *nvconfig; 2696 2697 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2698 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2699 2700 if (!spa_config_valid(spa, nvconfig)) { 2701 nvlist_free(nvconfig); 2702 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 2703 ENXIO)); 2704 } 2705 nvlist_free(nvconfig); 2706 2707 /* 2708 * Now that we've validated the config, check the state of the 2709 * root vdev. If it can't be opened, it indicates one or 2710 * more toplevel vdevs are faulted. 2711 */ 2712 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2713 return (SET_ERROR(ENXIO)); 2714 2715 if (spa_check_logs(spa)) { 2716 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 2717 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); 2718 } 2719 } 2720 2721 if (missing_feat_write) { 2722 ASSERT(state == SPA_LOAD_TRYIMPORT); 2723 2724 /* 2725 * At this point, we know that we can open the pool in 2726 * read-only mode but not read-write mode. We now have enough 2727 * information and can return to userland. 2728 */ 2729 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); 2730 } 2731 2732 /* 2733 * We've successfully opened the pool, verify that we're ready 2734 * to start pushing transactions. 2735 */ 2736 if (state != SPA_LOAD_TRYIMPORT) { 2737 if (error = spa_load_verify(spa)) 2738 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2739 error)); 2740 } 2741 2742 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || 2743 spa->spa_load_max_txg == UINT64_MAX)) { 2744 dmu_tx_t *tx; 2745 int need_update = B_FALSE; 2746 2747 ASSERT(state != SPA_LOAD_TRYIMPORT); 2748 2749 /* 2750 * Claim log blocks that haven't been committed yet. 2751 * This must all happen in a single txg. 2752 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 2753 * invoked from zil_claim_log_block()'s i/o done callback. 2754 * Price of rollback is that we abandon the log. 2755 */ 2756 spa->spa_claiming = B_TRUE; 2757 2758 tx = dmu_tx_create_assigned(spa_get_dsl(spa), 2759 spa_first_txg(spa)); 2760 (void) dmu_objset_find(spa_name(spa), 2761 zil_claim, tx, DS_FIND_CHILDREN); 2762 dmu_tx_commit(tx); 2763 2764 spa->spa_claiming = B_FALSE; 2765 2766 spa_set_log_state(spa, SPA_LOG_GOOD); 2767 spa->spa_sync_on = B_TRUE; 2768 txg_sync_start(spa->spa_dsl_pool); 2769 2770 /* 2771 * Wait for all claims to sync. We sync up to the highest 2772 * claimed log block birth time so that claimed log blocks 2773 * don't appear to be from the future. spa_claim_max_txg 2774 * will have been set for us by either zil_check_log_chain() 2775 * (invoked from spa_check_logs()) or zil_claim() above. 2776 */ 2777 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 2778 2779 /* 2780 * If the config cache is stale, or we have uninitialized 2781 * metaslabs (see spa_vdev_add()), then update the config. 2782 * 2783 * If this is a verbatim import, trust the current 2784 * in-core spa_config and update the disk labels. 2785 */ 2786 if (config_cache_txg != spa->spa_config_txg || 2787 state == SPA_LOAD_IMPORT || 2788 state == SPA_LOAD_RECOVER || 2789 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 2790 need_update = B_TRUE; 2791 2792 for (int c = 0; c < rvd->vdev_children; c++) 2793 if (rvd->vdev_child[c]->vdev_ms_array == 0) 2794 need_update = B_TRUE; 2795 2796 /* 2797 * Update the config cache asychronously in case we're the 2798 * root pool, in which case the config cache isn't writable yet. 2799 */ 2800 if (need_update) 2801 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2802 2803 /* 2804 * Check all DTLs to see if anything needs resilvering. 2805 */ 2806 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 2807 vdev_resilver_needed(rvd, NULL, NULL)) 2808 spa_async_request(spa, SPA_ASYNC_RESILVER); 2809 2810 /* 2811 * Log the fact that we booted up (so that we can detect if 2812 * we rebooted in the middle of an operation). 2813 */ 2814 spa_history_log_version(spa, "open"); 2815 2816 /* 2817 * Delete any inconsistent datasets. 2818 */ 2819 (void) dmu_objset_find(spa_name(spa), 2820 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 2821 2822 /* 2823 * Clean up any stale temporary dataset userrefs. 2824 */ 2825 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 2826 } 2827 2828 return (0); 2829} 2830 2831static int 2832spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) 2833{ 2834 int mode = spa->spa_mode; 2835 2836 spa_unload(spa); 2837 spa_deactivate(spa); 2838 2839 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg - 1; 2840 2841 spa_activate(spa, mode); 2842 spa_async_suspend(spa); 2843 2844 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); 2845} 2846 2847/* 2848 * If spa_load() fails this function will try loading prior txg's. If 2849 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 2850 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 2851 * function will not rewind the pool and will return the same error as 2852 * spa_load(). 2853 */ 2854static int 2855spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, 2856 uint64_t max_request, int rewind_flags) 2857{ 2858 nvlist_t *loadinfo = NULL; 2859 nvlist_t *config = NULL; 2860 int load_error, rewind_error; 2861 uint64_t safe_rewind_txg; 2862 uint64_t min_txg; 2863 2864 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 2865 spa->spa_load_max_txg = spa->spa_load_txg; 2866 spa_set_log_state(spa, SPA_LOG_CLEAR); 2867 } else { 2868 spa->spa_load_max_txg = max_request; 2869 if (max_request != UINT64_MAX) 2870 spa->spa_extreme_rewind = B_TRUE; 2871 } 2872 2873 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, 2874 mosconfig); 2875 if (load_error == 0) 2876 return (0); 2877 2878 if (spa->spa_root_vdev != NULL) 2879 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2880 2881 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 2882 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 2883 2884 if (rewind_flags & ZPOOL_NEVER_REWIND) { 2885 nvlist_free(config); 2886 return (load_error); 2887 } 2888 2889 if (state == SPA_LOAD_RECOVER) { 2890 /* Price of rolling back is discarding txgs, including log */ 2891 spa_set_log_state(spa, SPA_LOG_CLEAR); 2892 } else { 2893 /* 2894 * If we aren't rolling back save the load info from our first 2895 * import attempt so that we can restore it after attempting 2896 * to rewind. 2897 */ 2898 loadinfo = spa->spa_load_info; 2899 spa->spa_load_info = fnvlist_alloc(); 2900 } 2901 2902 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 2903 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 2904 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 2905 TXG_INITIAL : safe_rewind_txg; 2906 2907 /* 2908 * Continue as long as we're finding errors, we're still within 2909 * the acceptable rewind range, and we're still finding uberblocks 2910 */ 2911 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 2912 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 2913 if (spa->spa_load_max_txg < safe_rewind_txg) 2914 spa->spa_extreme_rewind = B_TRUE; 2915 rewind_error = spa_load_retry(spa, state, mosconfig); 2916 } 2917 2918 spa->spa_extreme_rewind = B_FALSE; 2919 spa->spa_load_max_txg = UINT64_MAX; 2920 2921 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 2922 spa_config_set(spa, config); 2923 2924 if (state == SPA_LOAD_RECOVER) { 2925 ASSERT3P(loadinfo, ==, NULL); 2926 return (rewind_error); 2927 } else { 2928 /* Store the rewind info as part of the initial load info */ 2929 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 2930 spa->spa_load_info); 2931 2932 /* Restore the initial load info */ 2933 fnvlist_free(spa->spa_load_info); 2934 spa->spa_load_info = loadinfo; 2935 2936 return (load_error); 2937 } 2938} 2939 2940/* 2941 * Pool Open/Import 2942 * 2943 * The import case is identical to an open except that the configuration is sent 2944 * down from userland, instead of grabbed from the configuration cache. For the 2945 * case of an open, the pool configuration will exist in the 2946 * POOL_STATE_UNINITIALIZED state. 2947 * 2948 * The stats information (gen/count/ustats) is used to gather vdev statistics at 2949 * the same time open the pool, without having to keep around the spa_t in some 2950 * ambiguous state. 2951 */ 2952static int 2953spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 2954 nvlist_t **config) 2955{ 2956 spa_t *spa; 2957 spa_load_state_t state = SPA_LOAD_OPEN; 2958 int error; 2959 int locked = B_FALSE; 2960 int firstopen = B_FALSE; 2961 2962 *spapp = NULL; 2963 2964 /* 2965 * As disgusting as this is, we need to support recursive calls to this 2966 * function because dsl_dir_open() is called during spa_load(), and ends 2967 * up calling spa_open() again. The real fix is to figure out how to 2968 * avoid dsl_dir_open() calling this in the first place. 2969 */ 2970 if (mutex_owner(&spa_namespace_lock) != curthread) { 2971 mutex_enter(&spa_namespace_lock); 2972 locked = B_TRUE; 2973 } 2974 2975 if ((spa = spa_lookup(pool)) == NULL) { 2976 if (locked) 2977 mutex_exit(&spa_namespace_lock); 2978 return (SET_ERROR(ENOENT)); 2979 } 2980 2981 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 2982 zpool_rewind_policy_t policy; 2983 2984 firstopen = B_TRUE; 2985 2986 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, 2987 &policy); 2988 if (policy.zrp_request & ZPOOL_DO_REWIND) 2989 state = SPA_LOAD_RECOVER; 2990 2991 spa_activate(spa, spa_mode_global); 2992 2993 if (state != SPA_LOAD_RECOVER) 2994 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 2995 2996 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, 2997 policy.zrp_request); 2998 2999 if (error == EBADF) { 3000 /* 3001 * If vdev_validate() returns failure (indicated by 3002 * EBADF), it indicates that one of the vdevs indicates 3003 * that the pool has been exported or destroyed. If 3004 * this is the case, the config cache is out of sync and 3005 * we should remove the pool from the namespace. 3006 */ 3007 spa_unload(spa); 3008 spa_deactivate(spa); 3009 spa_config_sync(spa, B_TRUE, B_TRUE); 3010 spa_remove(spa); 3011 if (locked) 3012 mutex_exit(&spa_namespace_lock); 3013 return (SET_ERROR(ENOENT)); 3014 } 3015 3016 if (error) { 3017 /* 3018 * We can't open the pool, but we still have useful 3019 * information: the state of each vdev after the 3020 * attempted vdev_open(). Return this to the user. 3021 */ 3022 if (config != NULL && spa->spa_config) { 3023 VERIFY(nvlist_dup(spa->spa_config, config, 3024 KM_SLEEP) == 0); 3025 VERIFY(nvlist_add_nvlist(*config, 3026 ZPOOL_CONFIG_LOAD_INFO, 3027 spa->spa_load_info) == 0); 3028 } 3029 spa_unload(spa); 3030 spa_deactivate(spa); 3031 spa->spa_last_open_failed = error; 3032 if (locked) 3033 mutex_exit(&spa_namespace_lock); 3034 *spapp = NULL; 3035 return (error); 3036 } 3037 } 3038 3039 spa_open_ref(spa, tag); 3040 3041 if (config != NULL) 3042 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 3043 3044 /* 3045 * If we've recovered the pool, pass back any information we 3046 * gathered while doing the load. 3047 */ 3048 if (state == SPA_LOAD_RECOVER) { 3049 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 3050 spa->spa_load_info) == 0); 3051 } 3052 3053 if (locked) { 3054 spa->spa_last_open_failed = 0; 3055 spa->spa_last_ubsync_txg = 0; 3056 spa->spa_load_txg = 0; 3057 mutex_exit(&spa_namespace_lock); 3058#ifdef __FreeBSD__ 3059#ifdef _KERNEL 3060 if (firstopen) 3061 zvol_create_minors(spa->spa_name); 3062#endif 3063#endif 3064 } 3065 3066 *spapp = spa; 3067 3068 return (0); 3069} 3070 3071int 3072spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 3073 nvlist_t **config) 3074{ 3075 return (spa_open_common(name, spapp, tag, policy, config)); 3076} 3077 3078int 3079spa_open(const char *name, spa_t **spapp, void *tag) 3080{ 3081 return (spa_open_common(name, spapp, tag, NULL, NULL)); 3082} 3083 3084/* 3085 * Lookup the given spa_t, incrementing the inject count in the process, 3086 * preventing it from being exported or destroyed. 3087 */ 3088spa_t * 3089spa_inject_addref(char *name) 3090{ 3091 spa_t *spa; 3092 3093 mutex_enter(&spa_namespace_lock); 3094 if ((spa = spa_lookup(name)) == NULL) { 3095 mutex_exit(&spa_namespace_lock); 3096 return (NULL); 3097 } 3098 spa->spa_inject_ref++; 3099 mutex_exit(&spa_namespace_lock); 3100 3101 return (spa); 3102} 3103 3104void 3105spa_inject_delref(spa_t *spa) 3106{ 3107 mutex_enter(&spa_namespace_lock); 3108 spa->spa_inject_ref--; 3109 mutex_exit(&spa_namespace_lock); 3110} 3111 3112/* 3113 * Add spares device information to the nvlist. 3114 */ 3115static void 3116spa_add_spares(spa_t *spa, nvlist_t *config) 3117{ 3118 nvlist_t **spares; 3119 uint_t i, nspares; 3120 nvlist_t *nvroot; 3121 uint64_t guid; 3122 vdev_stat_t *vs; 3123 uint_t vsc; 3124 uint64_t pool; 3125 3126 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3127 3128 if (spa->spa_spares.sav_count == 0) 3129 return; 3130 3131 VERIFY(nvlist_lookup_nvlist(config, 3132 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3133 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 3134 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3135 if (nspares != 0) { 3136 VERIFY(nvlist_add_nvlist_array(nvroot, 3137 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3138 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3139 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3140 3141 /* 3142 * Go through and find any spares which have since been 3143 * repurposed as an active spare. If this is the case, update 3144 * their status appropriately. 3145 */ 3146 for (i = 0; i < nspares; i++) { 3147 VERIFY(nvlist_lookup_uint64(spares[i], 3148 ZPOOL_CONFIG_GUID, &guid) == 0); 3149 if (spa_spare_exists(guid, &pool, NULL) && 3150 pool != 0ULL) { 3151 VERIFY(nvlist_lookup_uint64_array( 3152 spares[i], ZPOOL_CONFIG_VDEV_STATS, 3153 (uint64_t **)&vs, &vsc) == 0); 3154 vs->vs_state = VDEV_STATE_CANT_OPEN; 3155 vs->vs_aux = VDEV_AUX_SPARED; 3156 } 3157 } 3158 } 3159} 3160 3161/* 3162 * Add l2cache device information to the nvlist, including vdev stats. 3163 */ 3164static void 3165spa_add_l2cache(spa_t *spa, nvlist_t *config) 3166{ 3167 nvlist_t **l2cache; 3168 uint_t i, j, nl2cache; 3169 nvlist_t *nvroot; 3170 uint64_t guid; 3171 vdev_t *vd; 3172 vdev_stat_t *vs; 3173 uint_t vsc; 3174 3175 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3176 3177 if (spa->spa_l2cache.sav_count == 0) 3178 return; 3179 3180 VERIFY(nvlist_lookup_nvlist(config, 3181 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3182 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 3183 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3184 if (nl2cache != 0) { 3185 VERIFY(nvlist_add_nvlist_array(nvroot, 3186 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3187 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3188 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3189 3190 /* 3191 * Update level 2 cache device stats. 3192 */ 3193 3194 for (i = 0; i < nl2cache; i++) { 3195 VERIFY(nvlist_lookup_uint64(l2cache[i], 3196 ZPOOL_CONFIG_GUID, &guid) == 0); 3197 3198 vd = NULL; 3199 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 3200 if (guid == 3201 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 3202 vd = spa->spa_l2cache.sav_vdevs[j]; 3203 break; 3204 } 3205 } 3206 ASSERT(vd != NULL); 3207 3208 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 3209 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 3210 == 0); 3211 vdev_get_stats(vd, vs); 3212 } 3213 } 3214} 3215 3216static void 3217spa_add_feature_stats(spa_t *spa, nvlist_t *config) 3218{ 3219 nvlist_t *features; 3220 zap_cursor_t zc; 3221 zap_attribute_t za; 3222 3223 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3224 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3225 3226 /* We may be unable to read features if pool is suspended. */ 3227 if (spa_suspended(spa)) 3228 goto out; 3229 3230 if (spa->spa_feat_for_read_obj != 0) { 3231 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3232 spa->spa_feat_for_read_obj); 3233 zap_cursor_retrieve(&zc, &za) == 0; 3234 zap_cursor_advance(&zc)) { 3235 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3236 za.za_num_integers == 1); 3237 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3238 za.za_first_integer)); 3239 } 3240 zap_cursor_fini(&zc); 3241 } 3242 3243 if (spa->spa_feat_for_write_obj != 0) { 3244 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3245 spa->spa_feat_for_write_obj); 3246 zap_cursor_retrieve(&zc, &za) == 0; 3247 zap_cursor_advance(&zc)) { 3248 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3249 za.za_num_integers == 1); 3250 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3251 za.za_first_integer)); 3252 } 3253 zap_cursor_fini(&zc); 3254 } 3255 3256out: 3257 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 3258 features) == 0); 3259 nvlist_free(features); 3260} 3261 3262int 3263spa_get_stats(const char *name, nvlist_t **config, 3264 char *altroot, size_t buflen) 3265{ 3266 int error; 3267 spa_t *spa; 3268 3269 *config = NULL; 3270 error = spa_open_common(name, &spa, FTAG, NULL, config); 3271 3272 if (spa != NULL) { 3273 /* 3274 * This still leaves a window of inconsistency where the spares 3275 * or l2cache devices could change and the config would be 3276 * self-inconsistent. 3277 */ 3278 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3279 3280 if (*config != NULL) { 3281 uint64_t loadtimes[2]; 3282 3283 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 3284 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 3285 VERIFY(nvlist_add_uint64_array(*config, 3286 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 3287 3288 VERIFY(nvlist_add_uint64(*config, 3289 ZPOOL_CONFIG_ERRCOUNT, 3290 spa_get_errlog_size(spa)) == 0); 3291 3292 if (spa_suspended(spa)) 3293 VERIFY(nvlist_add_uint64(*config, 3294 ZPOOL_CONFIG_SUSPENDED, 3295 spa->spa_failmode) == 0); 3296 3297 spa_add_spares(spa, *config); 3298 spa_add_l2cache(spa, *config); 3299 spa_add_feature_stats(spa, *config); 3300 } 3301 } 3302 3303 /* 3304 * We want to get the alternate root even for faulted pools, so we cheat 3305 * and call spa_lookup() directly. 3306 */ 3307 if (altroot) { 3308 if (spa == NULL) { 3309 mutex_enter(&spa_namespace_lock); 3310 spa = spa_lookup(name); 3311 if (spa) 3312 spa_altroot(spa, altroot, buflen); 3313 else 3314 altroot[0] = '\0'; 3315 spa = NULL; 3316 mutex_exit(&spa_namespace_lock); 3317 } else { 3318 spa_altroot(spa, altroot, buflen); 3319 } 3320 } 3321 3322 if (spa != NULL) { 3323 spa_config_exit(spa, SCL_CONFIG, FTAG); 3324 spa_close(spa, FTAG); 3325 } 3326 3327 return (error); 3328} 3329 3330/* 3331 * Validate that the auxiliary device array is well formed. We must have an 3332 * array of nvlists, each which describes a valid leaf vdev. If this is an 3333 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 3334 * specified, as long as they are well-formed. 3335 */ 3336static int 3337spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 3338 spa_aux_vdev_t *sav, const char *config, uint64_t version, 3339 vdev_labeltype_t label) 3340{ 3341 nvlist_t **dev; 3342 uint_t i, ndev; 3343 vdev_t *vd; 3344 int error; 3345 3346 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3347 3348 /* 3349 * It's acceptable to have no devs specified. 3350 */ 3351 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 3352 return (0); 3353 3354 if (ndev == 0) 3355 return (SET_ERROR(EINVAL)); 3356 3357 /* 3358 * Make sure the pool is formatted with a version that supports this 3359 * device type. 3360 */ 3361 if (spa_version(spa) < version) 3362 return (SET_ERROR(ENOTSUP)); 3363 3364 /* 3365 * Set the pending device list so we correctly handle device in-use 3366 * checking. 3367 */ 3368 sav->sav_pending = dev; 3369 sav->sav_npending = ndev; 3370 3371 for (i = 0; i < ndev; i++) { 3372 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 3373 mode)) != 0) 3374 goto out; 3375 3376 if (!vd->vdev_ops->vdev_op_leaf) { 3377 vdev_free(vd); 3378 error = SET_ERROR(EINVAL); 3379 goto out; 3380 } 3381 3382 /* 3383 * The L2ARC currently only supports disk devices in 3384 * kernel context. For user-level testing, we allow it. 3385 */ 3386#ifdef _KERNEL 3387 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && 3388 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { 3389 error = SET_ERROR(ENOTBLK); 3390 vdev_free(vd); 3391 goto out; 3392 } 3393#endif 3394 vd->vdev_top = vd; 3395 3396 if ((error = vdev_open(vd)) == 0 && 3397 (error = vdev_label_init(vd, crtxg, label)) == 0) { 3398 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 3399 vd->vdev_guid) == 0); 3400 } 3401 3402 vdev_free(vd); 3403 3404 if (error && 3405 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 3406 goto out; 3407 else 3408 error = 0; 3409 } 3410 3411out: 3412 sav->sav_pending = NULL; 3413 sav->sav_npending = 0; 3414 return (error); 3415} 3416 3417static int 3418spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 3419{ 3420 int error; 3421 3422 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3423 3424 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3425 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 3426 VDEV_LABEL_SPARE)) != 0) { 3427 return (error); 3428 } 3429 3430 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3431 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 3432 VDEV_LABEL_L2CACHE)); 3433} 3434 3435static void 3436spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 3437 const char *config) 3438{ 3439 int i; 3440 3441 if (sav->sav_config != NULL) { 3442 nvlist_t **olddevs; 3443 uint_t oldndevs; 3444 nvlist_t **newdevs; 3445 3446 /* 3447 * Generate new dev list by concatentating with the 3448 * current dev list. 3449 */ 3450 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 3451 &olddevs, &oldndevs) == 0); 3452 3453 newdevs = kmem_alloc(sizeof (void *) * 3454 (ndevs + oldndevs), KM_SLEEP); 3455 for (i = 0; i < oldndevs; i++) 3456 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 3457 KM_SLEEP) == 0); 3458 for (i = 0; i < ndevs; i++) 3459 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 3460 KM_SLEEP) == 0); 3461 3462 VERIFY(nvlist_remove(sav->sav_config, config, 3463 DATA_TYPE_NVLIST_ARRAY) == 0); 3464 3465 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 3466 config, newdevs, ndevs + oldndevs) == 0); 3467 for (i = 0; i < oldndevs + ndevs; i++) 3468 nvlist_free(newdevs[i]); 3469 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 3470 } else { 3471 /* 3472 * Generate a new dev list. 3473 */ 3474 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 3475 KM_SLEEP) == 0); 3476 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 3477 devs, ndevs) == 0); 3478 } 3479} 3480 3481/* 3482 * Stop and drop level 2 ARC devices 3483 */ 3484void 3485spa_l2cache_drop(spa_t *spa) 3486{ 3487 vdev_t *vd; 3488 int i; 3489 spa_aux_vdev_t *sav = &spa->spa_l2cache; 3490 3491 for (i = 0; i < sav->sav_count; i++) { 3492 uint64_t pool; 3493 3494 vd = sav->sav_vdevs[i]; 3495 ASSERT(vd != NULL); 3496 3497 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 3498 pool != 0ULL && l2arc_vdev_present(vd)) 3499 l2arc_remove_vdev(vd); 3500 } 3501} 3502 3503/* 3504 * Pool Creation 3505 */ 3506int 3507spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 3508 nvlist_t *zplprops) 3509{ 3510 spa_t *spa; 3511 char *altroot = NULL; 3512 vdev_t *rvd; 3513 dsl_pool_t *dp; 3514 dmu_tx_t *tx; 3515 int error = 0; 3516 uint64_t txg = TXG_INITIAL; 3517 nvlist_t **spares, **l2cache; 3518 uint_t nspares, nl2cache; 3519 uint64_t version, obj; 3520 boolean_t has_features; 3521 3522 /* 3523 * If this pool already exists, return failure. 3524 */ 3525 mutex_enter(&spa_namespace_lock); 3526 if (spa_lookup(pool) != NULL) { 3527 mutex_exit(&spa_namespace_lock); 3528 return (SET_ERROR(EEXIST)); 3529 } 3530 3531 /* 3532 * Allocate a new spa_t structure. 3533 */ 3534 (void) nvlist_lookup_string(props, 3535 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3536 spa = spa_add(pool, NULL, altroot); 3537 spa_activate(spa, spa_mode_global); 3538 3539 if (props && (error = spa_prop_validate(spa, props))) { 3540 spa_deactivate(spa); 3541 spa_remove(spa); 3542 mutex_exit(&spa_namespace_lock); 3543 return (error); 3544 } 3545 3546 has_features = B_FALSE; 3547 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 3548 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 3549 if (zpool_prop_feature(nvpair_name(elem))) 3550 has_features = B_TRUE; 3551 } 3552 3553 if (has_features || nvlist_lookup_uint64(props, 3554 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 3555 version = SPA_VERSION; 3556 } 3557 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 3558 3559 spa->spa_first_txg = txg; 3560 spa->spa_uberblock.ub_txg = txg - 1; 3561 spa->spa_uberblock.ub_version = version; 3562 spa->spa_ubsync = spa->spa_uberblock; 3563 3564 /* 3565 * Create "The Godfather" zio to hold all async IOs 3566 */ 3567 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 3568 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 3569 3570 /* 3571 * Create the root vdev. 3572 */ 3573 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3574 3575 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 3576 3577 ASSERT(error != 0 || rvd != NULL); 3578 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 3579 3580 if (error == 0 && !zfs_allocatable_devs(nvroot)) 3581 error = SET_ERROR(EINVAL); 3582 3583 if (error == 0 && 3584 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 3585 (error = spa_validate_aux(spa, nvroot, txg, 3586 VDEV_ALLOC_ADD)) == 0) { 3587 for (int c = 0; c < rvd->vdev_children; c++) { 3588 vdev_ashift_optimize(rvd->vdev_child[c]); 3589 vdev_metaslab_set_size(rvd->vdev_child[c]); 3590 vdev_expand(rvd->vdev_child[c], txg); 3591 } 3592 } 3593 3594 spa_config_exit(spa, SCL_ALL, FTAG); 3595 3596 if (error != 0) { 3597 spa_unload(spa); 3598 spa_deactivate(spa); 3599 spa_remove(spa); 3600 mutex_exit(&spa_namespace_lock); 3601 return (error); 3602 } 3603 3604 /* 3605 * Get the list of spares, if specified. 3606 */ 3607 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3608 &spares, &nspares) == 0) { 3609 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 3610 KM_SLEEP) == 0); 3611 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3612 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3613 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3614 spa_load_spares(spa); 3615 spa_config_exit(spa, SCL_ALL, FTAG); 3616 spa->spa_spares.sav_sync = B_TRUE; 3617 } 3618 3619 /* 3620 * Get the list of level 2 cache devices, if specified. 3621 */ 3622 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3623 &l2cache, &nl2cache) == 0) { 3624 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3625 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3626 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3627 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3628 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3629 spa_load_l2cache(spa); 3630 spa_config_exit(spa, SCL_ALL, FTAG); 3631 spa->spa_l2cache.sav_sync = B_TRUE; 3632 } 3633 3634 spa->spa_is_initializing = B_TRUE; 3635 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); 3636 spa->spa_meta_objset = dp->dp_meta_objset; 3637 spa->spa_is_initializing = B_FALSE; 3638 3639 /* 3640 * Create DDTs (dedup tables). 3641 */ 3642 ddt_create(spa); 3643 3644 spa_update_dspace(spa); 3645 3646 tx = dmu_tx_create_assigned(dp, txg); 3647 3648 /* 3649 * Create the pool config object. 3650 */ 3651 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 3652 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 3653 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 3654 3655 if (zap_add(spa->spa_meta_objset, 3656 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 3657 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 3658 cmn_err(CE_PANIC, "failed to add pool config"); 3659 } 3660 3661 if (spa_version(spa) >= SPA_VERSION_FEATURES) 3662 spa_feature_create_zap_objects(spa, tx); 3663 3664 if (zap_add(spa->spa_meta_objset, 3665 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 3666 sizeof (uint64_t), 1, &version, tx) != 0) { 3667 cmn_err(CE_PANIC, "failed to add pool version"); 3668 } 3669 3670 /* Newly created pools with the right version are always deflated. */ 3671 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 3672 spa->spa_deflate = TRUE; 3673 if (zap_add(spa->spa_meta_objset, 3674 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 3675 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 3676 cmn_err(CE_PANIC, "failed to add deflate"); 3677 } 3678 } 3679 3680 /* 3681 * Create the deferred-free bpobj. Turn off compression 3682 * because sync-to-convergence takes longer if the blocksize 3683 * keeps changing. 3684 */ 3685 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 3686 dmu_object_set_compress(spa->spa_meta_objset, obj, 3687 ZIO_COMPRESS_OFF, tx); 3688 if (zap_add(spa->spa_meta_objset, 3689 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 3690 sizeof (uint64_t), 1, &obj, tx) != 0) { 3691 cmn_err(CE_PANIC, "failed to add bpobj"); 3692 } 3693 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 3694 spa->spa_meta_objset, obj)); 3695 3696 /* 3697 * Create the pool's history object. 3698 */ 3699 if (version >= SPA_VERSION_ZPOOL_HISTORY) 3700 spa_history_create_obj(spa, tx); 3701 3702 /* 3703 * Set pool properties. 3704 */ 3705 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 3706 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3707 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 3708 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 3709 3710 if (props != NULL) { 3711 spa_configfile_set(spa, props, B_FALSE); 3712 spa_sync_props(props, tx); 3713 } 3714 3715 dmu_tx_commit(tx); 3716 3717 spa->spa_sync_on = B_TRUE; 3718 txg_sync_start(spa->spa_dsl_pool); 3719 3720 /* 3721 * We explicitly wait for the first transaction to complete so that our 3722 * bean counters are appropriately updated. 3723 */ 3724 txg_wait_synced(spa->spa_dsl_pool, txg); 3725 3726 spa_config_sync(spa, B_FALSE, B_TRUE); 3727 3728 spa_history_log_version(spa, "create"); 3729 3730 spa->spa_minref = refcount_count(&spa->spa_refcount); 3731 3732 mutex_exit(&spa_namespace_lock); 3733 3734 return (0); 3735} 3736 3737#ifdef _KERNEL 3738#if defined(sun) 3739/* 3740 * Get the root pool information from the root disk, then import the root pool 3741 * during the system boot up time. 3742 */ 3743extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 3744 3745static nvlist_t * 3746spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 3747{ 3748 nvlist_t *config; 3749 nvlist_t *nvtop, *nvroot; 3750 uint64_t pgid; 3751 3752 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 3753 return (NULL); 3754 3755 /* 3756 * Add this top-level vdev to the child array. 3757 */ 3758 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3759 &nvtop) == 0); 3760 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3761 &pgid) == 0); 3762 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 3763 3764 /* 3765 * Put this pool's top-level vdevs into a root vdev. 3766 */ 3767 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3768 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3769 VDEV_TYPE_ROOT) == 0); 3770 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3771 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3772 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3773 &nvtop, 1) == 0); 3774 3775 /* 3776 * Replace the existing vdev_tree with the new root vdev in 3777 * this pool's configuration (remove the old, add the new). 3778 */ 3779 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3780 nvlist_free(nvroot); 3781 return (config); 3782} 3783 3784/* 3785 * Walk the vdev tree and see if we can find a device with "better" 3786 * configuration. A configuration is "better" if the label on that 3787 * device has a more recent txg. 3788 */ 3789static void 3790spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 3791{ 3792 for (int c = 0; c < vd->vdev_children; c++) 3793 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 3794 3795 if (vd->vdev_ops->vdev_op_leaf) { 3796 nvlist_t *label; 3797 uint64_t label_txg; 3798 3799 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 3800 &label) != 0) 3801 return; 3802 3803 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 3804 &label_txg) == 0); 3805 3806 /* 3807 * Do we have a better boot device? 3808 */ 3809 if (label_txg > *txg) { 3810 *txg = label_txg; 3811 *avd = vd; 3812 } 3813 nvlist_free(label); 3814 } 3815} 3816 3817/* 3818 * Import a root pool. 3819 * 3820 * For x86. devpath_list will consist of devid and/or physpath name of 3821 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 3822 * The GRUB "findroot" command will return the vdev we should boot. 3823 * 3824 * For Sparc, devpath_list consists the physpath name of the booting device 3825 * no matter the rootpool is a single device pool or a mirrored pool. 3826 * e.g. 3827 * "/pci@1f,0/ide@d/disk@0,0:a" 3828 */ 3829int 3830spa_import_rootpool(char *devpath, char *devid) 3831{ 3832 spa_t *spa; 3833 vdev_t *rvd, *bvd, *avd = NULL; 3834 nvlist_t *config, *nvtop; 3835 uint64_t guid, txg; 3836 char *pname; 3837 int error; 3838 3839 /* 3840 * Read the label from the boot device and generate a configuration. 3841 */ 3842 config = spa_generate_rootconf(devpath, devid, &guid); 3843#if defined(_OBP) && defined(_KERNEL) 3844 if (config == NULL) { 3845 if (strstr(devpath, "/iscsi/ssd") != NULL) { 3846 /* iscsi boot */ 3847 get_iscsi_bootpath_phy(devpath); 3848 config = spa_generate_rootconf(devpath, devid, &guid); 3849 } 3850 } 3851#endif 3852 if (config == NULL) { 3853 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 3854 devpath); 3855 return (SET_ERROR(EIO)); 3856 } 3857 3858 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 3859 &pname) == 0); 3860 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 3861 3862 mutex_enter(&spa_namespace_lock); 3863 if ((spa = spa_lookup(pname)) != NULL) { 3864 /* 3865 * Remove the existing root pool from the namespace so that we 3866 * can replace it with the correct config we just read in. 3867 */ 3868 spa_remove(spa); 3869 } 3870 3871 spa = spa_add(pname, config, NULL); 3872 spa->spa_is_root = B_TRUE; 3873 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 3874 3875 /* 3876 * Build up a vdev tree based on the boot device's label config. 3877 */ 3878 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3879 &nvtop) == 0); 3880 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3881 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 3882 VDEV_ALLOC_ROOTPOOL); 3883 spa_config_exit(spa, SCL_ALL, FTAG); 3884 if (error) { 3885 mutex_exit(&spa_namespace_lock); 3886 nvlist_free(config); 3887 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 3888 pname); 3889 return (error); 3890 } 3891 3892 /* 3893 * Get the boot vdev. 3894 */ 3895 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 3896 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 3897 (u_longlong_t)guid); 3898 error = SET_ERROR(ENOENT); 3899 goto out; 3900 } 3901 3902 /* 3903 * Determine if there is a better boot device. 3904 */ 3905 avd = bvd; 3906 spa_alt_rootvdev(rvd, &avd, &txg); 3907 if (avd != bvd) { 3908 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 3909 "try booting from '%s'", avd->vdev_path); 3910 error = SET_ERROR(EINVAL); 3911 goto out; 3912 } 3913 3914 /* 3915 * If the boot device is part of a spare vdev then ensure that 3916 * we're booting off the active spare. 3917 */ 3918 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 3919 !bvd->vdev_isspare) { 3920 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 3921 "try booting from '%s'", 3922 bvd->vdev_parent-> 3923 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 3924 error = SET_ERROR(EINVAL); 3925 goto out; 3926 } 3927 3928 error = 0; 3929out: 3930 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3931 vdev_free(rvd); 3932 spa_config_exit(spa, SCL_ALL, FTAG); 3933 mutex_exit(&spa_namespace_lock); 3934 3935 nvlist_free(config); 3936 return (error); 3937} 3938 3939#else 3940 3941extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs, 3942 uint64_t *count); 3943 3944static nvlist_t * 3945spa_generate_rootconf(const char *name) 3946{ 3947 nvlist_t **configs, **tops; 3948 nvlist_t *config; 3949 nvlist_t *best_cfg, *nvtop, *nvroot; 3950 uint64_t *holes; 3951 uint64_t best_txg; 3952 uint64_t nchildren; 3953 uint64_t pgid; 3954 uint64_t count; 3955 uint64_t i; 3956 uint_t nholes; 3957 3958 if (vdev_geom_read_pool_label(name, &configs, &count) != 0) 3959 return (NULL); 3960 3961 ASSERT3U(count, !=, 0); 3962 best_txg = 0; 3963 for (i = 0; i < count; i++) { 3964 uint64_t txg; 3965 3966 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG, 3967 &txg) == 0); 3968 if (txg > best_txg) { 3969 best_txg = txg; 3970 best_cfg = configs[i]; 3971 } 3972 } 3973 3974 /* 3975 * Multi-vdev root pool configuration discovery is not supported yet. 3976 */ 3977 nchildren = 1; 3978 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren); 3979 holes = NULL; 3980 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY, 3981 &holes, &nholes); 3982 3983 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP); 3984 for (i = 0; i < nchildren; i++) { 3985 if (i >= count) 3986 break; 3987 if (configs[i] == NULL) 3988 continue; 3989 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE, 3990 &nvtop) == 0); 3991 nvlist_dup(nvtop, &tops[i], KM_SLEEP); 3992 } 3993 for (i = 0; holes != NULL && i < nholes; i++) { 3994 if (i >= nchildren) 3995 continue; 3996 if (tops[holes[i]] != NULL) 3997 continue; 3998 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP); 3999 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE, 4000 VDEV_TYPE_HOLE) == 0); 4001 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, 4002 holes[i]) == 0); 4003 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 4004 0) == 0); 4005 } 4006 for (i = 0; i < nchildren; i++) { 4007 if (tops[i] != NULL) 4008 continue; 4009 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP); 4010 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE, 4011 VDEV_TYPE_MISSING) == 0); 4012 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, 4013 i) == 0); 4014 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 4015 0) == 0); 4016 } 4017 4018 /* 4019 * Create pool config based on the best vdev config. 4020 */ 4021 nvlist_dup(best_cfg, &config, KM_SLEEP); 4022 4023 /* 4024 * Put this pool's top-level vdevs into a root vdev. 4025 */ 4026 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 4027 &pgid) == 0); 4028 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4029 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 4030 VDEV_TYPE_ROOT) == 0); 4031 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 4032 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 4033 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 4034 tops, nchildren) == 0); 4035 4036 /* 4037 * Replace the existing vdev_tree with the new root vdev in 4038 * this pool's configuration (remove the old, add the new). 4039 */ 4040 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 4041 4042 /* 4043 * Drop vdev config elements that should not be present at pool level. 4044 */ 4045 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64); 4046 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64); 4047 4048 for (i = 0; i < count; i++) 4049 nvlist_free(configs[i]); 4050 kmem_free(configs, count * sizeof(void *)); 4051 for (i = 0; i < nchildren; i++) 4052 nvlist_free(tops[i]); 4053 kmem_free(tops, nchildren * sizeof(void *)); 4054 nvlist_free(nvroot); 4055 return (config); 4056} 4057 4058int 4059spa_import_rootpool(const char *name) 4060{ 4061 spa_t *spa; 4062 vdev_t *rvd, *bvd, *avd = NULL; 4063 nvlist_t *config, *nvtop; 4064 uint64_t txg; 4065 char *pname; 4066 int error; 4067 4068 /* 4069 * Read the label from the boot device and generate a configuration. 4070 */ 4071 config = spa_generate_rootconf(name); 4072 4073 mutex_enter(&spa_namespace_lock); 4074 if (config != NULL) { 4075 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 4076 &pname) == 0 && strcmp(name, pname) == 0); 4077 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) 4078 == 0); 4079 4080 if ((spa = spa_lookup(pname)) != NULL) { 4081 /* 4082 * Remove the existing root pool from the namespace so 4083 * that we can replace it with the correct config 4084 * we just read in. 4085 */ 4086 spa_remove(spa); 4087 } 4088 spa = spa_add(pname, config, NULL); 4089 4090 /* 4091 * Set spa_ubsync.ub_version as it can be used in vdev_alloc() 4092 * via spa_version(). 4093 */ 4094 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 4095 &spa->spa_ubsync.ub_version) != 0) 4096 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 4097 } else if ((spa = spa_lookup(name)) == NULL) { 4098 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'", 4099 name); 4100 return (EIO); 4101 } else { 4102 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0); 4103 } 4104 spa->spa_is_root = B_TRUE; 4105 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 4106 4107 /* 4108 * Build up a vdev tree based on the boot device's label config. 4109 */ 4110 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4111 &nvtop) == 0); 4112 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4113 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 4114 VDEV_ALLOC_ROOTPOOL); 4115 spa_config_exit(spa, SCL_ALL, FTAG); 4116 if (error) { 4117 mutex_exit(&spa_namespace_lock); 4118 nvlist_free(config); 4119 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 4120 pname); 4121 return (error); 4122 } 4123 4124 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4125 vdev_free(rvd); 4126 spa_config_exit(spa, SCL_ALL, FTAG); 4127 mutex_exit(&spa_namespace_lock); 4128 4129 nvlist_free(config); 4130 return (0); 4131} 4132 4133#endif /* sun */ 4134#endif 4135 4136/* 4137 * Import a non-root pool into the system. 4138 */ 4139int 4140spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 4141{ 4142 spa_t *spa; 4143 char *altroot = NULL; 4144 spa_load_state_t state = SPA_LOAD_IMPORT; 4145 zpool_rewind_policy_t policy; 4146 uint64_t mode = spa_mode_global; 4147 uint64_t readonly = B_FALSE; 4148 int error; 4149 nvlist_t *nvroot; 4150 nvlist_t **spares, **l2cache; 4151 uint_t nspares, nl2cache; 4152 4153 /* 4154 * If a pool with this name exists, return failure. 4155 */ 4156 mutex_enter(&spa_namespace_lock); 4157 if (spa_lookup(pool) != NULL) { 4158 mutex_exit(&spa_namespace_lock); 4159 return (SET_ERROR(EEXIST)); 4160 } 4161 4162 /* 4163 * Create and initialize the spa structure. 4164 */ 4165 (void) nvlist_lookup_string(props, 4166 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 4167 (void) nvlist_lookup_uint64(props, 4168 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 4169 if (readonly) 4170 mode = FREAD; 4171 spa = spa_add(pool, config, altroot); 4172 spa->spa_import_flags = flags; 4173 4174 /* 4175 * Verbatim import - Take a pool and insert it into the namespace 4176 * as if it had been loaded at boot. 4177 */ 4178 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 4179 if (props != NULL) 4180 spa_configfile_set(spa, props, B_FALSE); 4181 4182 spa_config_sync(spa, B_FALSE, B_TRUE); 4183 4184 mutex_exit(&spa_namespace_lock); 4185 return (0); 4186 } 4187 4188 spa_activate(spa, mode); 4189 4190 /* 4191 * Don't start async tasks until we know everything is healthy. 4192 */ 4193 spa_async_suspend(spa); 4194 4195 zpool_get_rewind_policy(config, &policy); 4196 if (policy.zrp_request & ZPOOL_DO_REWIND) 4197 state = SPA_LOAD_RECOVER; 4198 4199 /* 4200 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig 4201 * because the user-supplied config is actually the one to trust when 4202 * doing an import. 4203 */ 4204 if (state != SPA_LOAD_RECOVER) 4205 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 4206 4207 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, 4208 policy.zrp_request); 4209 4210 /* 4211 * Propagate anything learned while loading the pool and pass it 4212 * back to caller (i.e. rewind info, missing devices, etc). 4213 */ 4214 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4215 spa->spa_load_info) == 0); 4216 4217 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4218 /* 4219 * Toss any existing sparelist, as it doesn't have any validity 4220 * anymore, and conflicts with spa_has_spare(). 4221 */ 4222 if (spa->spa_spares.sav_config) { 4223 nvlist_free(spa->spa_spares.sav_config); 4224 spa->spa_spares.sav_config = NULL; 4225 spa_load_spares(spa); 4226 } 4227 if (spa->spa_l2cache.sav_config) { 4228 nvlist_free(spa->spa_l2cache.sav_config); 4229 spa->spa_l2cache.sav_config = NULL; 4230 spa_load_l2cache(spa); 4231 } 4232 4233 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4234 &nvroot) == 0); 4235 if (error == 0) 4236 error = spa_validate_aux(spa, nvroot, -1ULL, 4237 VDEV_ALLOC_SPARE); 4238 if (error == 0) 4239 error = spa_validate_aux(spa, nvroot, -1ULL, 4240 VDEV_ALLOC_L2CACHE); 4241 spa_config_exit(spa, SCL_ALL, FTAG); 4242 4243 if (props != NULL) 4244 spa_configfile_set(spa, props, B_FALSE); 4245 4246 if (error != 0 || (props && spa_writeable(spa) && 4247 (error = spa_prop_set(spa, props)))) { 4248 spa_unload(spa); 4249 spa_deactivate(spa); 4250 spa_remove(spa); 4251 mutex_exit(&spa_namespace_lock); 4252 return (error); 4253 } 4254 4255 spa_async_resume(spa); 4256 4257 /* 4258 * Override any spares and level 2 cache devices as specified by 4259 * the user, as these may have correct device names/devids, etc. 4260 */ 4261 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 4262 &spares, &nspares) == 0) { 4263 if (spa->spa_spares.sav_config) 4264 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 4265 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 4266 else 4267 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 4268 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4269 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 4270 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 4271 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4272 spa_load_spares(spa); 4273 spa_config_exit(spa, SCL_ALL, FTAG); 4274 spa->spa_spares.sav_sync = B_TRUE; 4275 } 4276 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 4277 &l2cache, &nl2cache) == 0) { 4278 if (spa->spa_l2cache.sav_config) 4279 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 4280 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 4281 else 4282 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 4283 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4284 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 4285 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 4286 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4287 spa_load_l2cache(spa); 4288 spa_config_exit(spa, SCL_ALL, FTAG); 4289 spa->spa_l2cache.sav_sync = B_TRUE; 4290 } 4291 4292 /* 4293 * Check for any removed devices. 4294 */ 4295 if (spa->spa_autoreplace) { 4296 spa_aux_check_removed(&spa->spa_spares); 4297 spa_aux_check_removed(&spa->spa_l2cache); 4298 } 4299 4300 if (spa_writeable(spa)) { 4301 /* 4302 * Update the config cache to include the newly-imported pool. 4303 */ 4304 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4305 } 4306 4307 /* 4308 * It's possible that the pool was expanded while it was exported. 4309 * We kick off an async task to handle this for us. 4310 */ 4311 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 4312 4313 mutex_exit(&spa_namespace_lock); 4314 spa_history_log_version(spa, "import"); 4315 4316#ifdef __FreeBSD__ 4317#ifdef _KERNEL 4318 zvol_create_minors(pool); 4319#endif 4320#endif 4321 return (0); 4322} 4323 4324nvlist_t * 4325spa_tryimport(nvlist_t *tryconfig) 4326{ 4327 nvlist_t *config = NULL; 4328 char *poolname; 4329 spa_t *spa; 4330 uint64_t state; 4331 int error; 4332 4333 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 4334 return (NULL); 4335 4336 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 4337 return (NULL); 4338 4339 /* 4340 * Create and initialize the spa structure. 4341 */ 4342 mutex_enter(&spa_namespace_lock); 4343 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 4344 spa_activate(spa, FREAD); 4345 4346 /* 4347 * Pass off the heavy lifting to spa_load(). 4348 * Pass TRUE for mosconfig because the user-supplied config 4349 * is actually the one to trust when doing an import. 4350 */ 4351 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); 4352 4353 /* 4354 * If 'tryconfig' was at least parsable, return the current config. 4355 */ 4356 if (spa->spa_root_vdev != NULL) { 4357 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4358 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 4359 poolname) == 0); 4360 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 4361 state) == 0); 4362 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 4363 spa->spa_uberblock.ub_timestamp) == 0); 4364 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4365 spa->spa_load_info) == 0); 4366 4367 /* 4368 * If the bootfs property exists on this pool then we 4369 * copy it out so that external consumers can tell which 4370 * pools are bootable. 4371 */ 4372 if ((!error || error == EEXIST) && spa->spa_bootfs) { 4373 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4374 4375 /* 4376 * We have to play games with the name since the 4377 * pool was opened as TRYIMPORT_NAME. 4378 */ 4379 if (dsl_dsobj_to_dsname(spa_name(spa), 4380 spa->spa_bootfs, tmpname) == 0) { 4381 char *cp; 4382 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4383 4384 cp = strchr(tmpname, '/'); 4385 if (cp == NULL) { 4386 (void) strlcpy(dsname, tmpname, 4387 MAXPATHLEN); 4388 } else { 4389 (void) snprintf(dsname, MAXPATHLEN, 4390 "%s/%s", poolname, ++cp); 4391 } 4392 VERIFY(nvlist_add_string(config, 4393 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 4394 kmem_free(dsname, MAXPATHLEN); 4395 } 4396 kmem_free(tmpname, MAXPATHLEN); 4397 } 4398 4399 /* 4400 * Add the list of hot spares and level 2 cache devices. 4401 */ 4402 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4403 spa_add_spares(spa, config); 4404 spa_add_l2cache(spa, config); 4405 spa_config_exit(spa, SCL_CONFIG, FTAG); 4406 } 4407 4408 spa_unload(spa); 4409 spa_deactivate(spa); 4410 spa_remove(spa); 4411 mutex_exit(&spa_namespace_lock); 4412 4413 return (config); 4414} 4415 4416/* 4417 * Pool export/destroy 4418 * 4419 * The act of destroying or exporting a pool is very simple. We make sure there 4420 * is no more pending I/O and any references to the pool are gone. Then, we 4421 * update the pool state and sync all the labels to disk, removing the 4422 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 4423 * we don't sync the labels or remove the configuration cache. 4424 */ 4425static int 4426spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 4427 boolean_t force, boolean_t hardforce) 4428{ 4429 spa_t *spa; 4430 4431 if (oldconfig) 4432 *oldconfig = NULL; 4433 4434 if (!(spa_mode_global & FWRITE)) 4435 return (SET_ERROR(EROFS)); 4436 4437 mutex_enter(&spa_namespace_lock); 4438 if ((spa = spa_lookup(pool)) == NULL) { 4439 mutex_exit(&spa_namespace_lock); 4440 return (SET_ERROR(ENOENT)); 4441 } 4442 4443 /* 4444 * Put a hold on the pool, drop the namespace lock, stop async tasks, 4445 * reacquire the namespace lock, and see if we can export. 4446 */ 4447 spa_open_ref(spa, FTAG); 4448 mutex_exit(&spa_namespace_lock); 4449 spa_async_suspend(spa); 4450 mutex_enter(&spa_namespace_lock); 4451 spa_close(spa, FTAG); 4452 4453 /* 4454 * The pool will be in core if it's openable, 4455 * in which case we can modify its state. 4456 */ 4457 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 4458 /* 4459 * Objsets may be open only because they're dirty, so we 4460 * have to force it to sync before checking spa_refcnt. 4461 */ 4462 txg_wait_synced(spa->spa_dsl_pool, 0); 4463 4464 /* 4465 * A pool cannot be exported or destroyed if there are active 4466 * references. If we are resetting a pool, allow references by 4467 * fault injection handlers. 4468 */ 4469 if (!spa_refcount_zero(spa) || 4470 (spa->spa_inject_ref != 0 && 4471 new_state != POOL_STATE_UNINITIALIZED)) { 4472 spa_async_resume(spa); 4473 mutex_exit(&spa_namespace_lock); 4474 return (SET_ERROR(EBUSY)); 4475 } 4476 4477 /* 4478 * A pool cannot be exported if it has an active shared spare. 4479 * This is to prevent other pools stealing the active spare 4480 * from an exported pool. At user's own will, such pool can 4481 * be forcedly exported. 4482 */ 4483 if (!force && new_state == POOL_STATE_EXPORTED && 4484 spa_has_active_shared_spare(spa)) { 4485 spa_async_resume(spa); 4486 mutex_exit(&spa_namespace_lock); 4487 return (SET_ERROR(EXDEV)); 4488 } 4489 4490 /* 4491 * We want this to be reflected on every label, 4492 * so mark them all dirty. spa_unload() will do the 4493 * final sync that pushes these changes out. 4494 */ 4495 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 4496 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4497 spa->spa_state = new_state; 4498 spa->spa_final_txg = spa_last_synced_txg(spa) + 4499 TXG_DEFER_SIZE + 1; 4500 vdev_config_dirty(spa->spa_root_vdev); 4501 spa_config_exit(spa, SCL_ALL, FTAG); 4502 } 4503 } 4504 4505 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY); 4506 4507 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 4508 spa_unload(spa); 4509 spa_deactivate(spa); 4510 } 4511 4512 if (oldconfig && spa->spa_config) 4513 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 4514 4515 if (new_state != POOL_STATE_UNINITIALIZED) { 4516 if (!hardforce) 4517 spa_config_sync(spa, B_TRUE, B_TRUE); 4518 spa_remove(spa); 4519 } 4520 mutex_exit(&spa_namespace_lock); 4521 4522 return (0); 4523} 4524 4525/* 4526 * Destroy a storage pool. 4527 */ 4528int 4529spa_destroy(char *pool) 4530{ 4531 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 4532 B_FALSE, B_FALSE)); 4533} 4534 4535/* 4536 * Export a storage pool. 4537 */ 4538int 4539spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 4540 boolean_t hardforce) 4541{ 4542 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 4543 force, hardforce)); 4544} 4545 4546/* 4547 * Similar to spa_export(), this unloads the spa_t without actually removing it 4548 * from the namespace in any way. 4549 */ 4550int 4551spa_reset(char *pool) 4552{ 4553 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 4554 B_FALSE, B_FALSE)); 4555} 4556 4557/* 4558 * ========================================================================== 4559 * Device manipulation 4560 * ========================================================================== 4561 */ 4562 4563/* 4564 * Add a device to a storage pool. 4565 */ 4566int 4567spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 4568{ 4569 uint64_t txg, id; 4570 int error; 4571 vdev_t *rvd = spa->spa_root_vdev; 4572 vdev_t *vd, *tvd; 4573 nvlist_t **spares, **l2cache; 4574 uint_t nspares, nl2cache; 4575 4576 ASSERT(spa_writeable(spa)); 4577 4578 txg = spa_vdev_enter(spa); 4579 4580 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 4581 VDEV_ALLOC_ADD)) != 0) 4582 return (spa_vdev_exit(spa, NULL, txg, error)); 4583 4584 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 4585 4586 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 4587 &nspares) != 0) 4588 nspares = 0; 4589 4590 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 4591 &nl2cache) != 0) 4592 nl2cache = 0; 4593 4594 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 4595 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 4596 4597 if (vd->vdev_children != 0 && 4598 (error = vdev_create(vd, txg, B_FALSE)) != 0) 4599 return (spa_vdev_exit(spa, vd, txg, error)); 4600 4601 /* 4602 * We must validate the spares and l2cache devices after checking the 4603 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 4604 */ 4605 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 4606 return (spa_vdev_exit(spa, vd, txg, error)); 4607 4608 /* 4609 * Transfer each new top-level vdev from vd to rvd. 4610 */ 4611 for (int c = 0; c < vd->vdev_children; c++) { 4612 4613 /* 4614 * Set the vdev id to the first hole, if one exists. 4615 */ 4616 for (id = 0; id < rvd->vdev_children; id++) { 4617 if (rvd->vdev_child[id]->vdev_ishole) { 4618 vdev_free(rvd->vdev_child[id]); 4619 break; 4620 } 4621 } 4622 tvd = vd->vdev_child[c]; 4623 vdev_remove_child(vd, tvd); 4624 tvd->vdev_id = id; 4625 vdev_add_child(rvd, tvd); 4626 vdev_config_dirty(tvd); 4627 } 4628 4629 if (nspares != 0) { 4630 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 4631 ZPOOL_CONFIG_SPARES); 4632 spa_load_spares(spa); 4633 spa->spa_spares.sav_sync = B_TRUE; 4634 } 4635 4636 if (nl2cache != 0) { 4637 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 4638 ZPOOL_CONFIG_L2CACHE); 4639 spa_load_l2cache(spa); 4640 spa->spa_l2cache.sav_sync = B_TRUE; 4641 } 4642 4643 /* 4644 * We have to be careful when adding new vdevs to an existing pool. 4645 * If other threads start allocating from these vdevs before we 4646 * sync the config cache, and we lose power, then upon reboot we may 4647 * fail to open the pool because there are DVAs that the config cache 4648 * can't translate. Therefore, we first add the vdevs without 4649 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 4650 * and then let spa_config_update() initialize the new metaslabs. 4651 * 4652 * spa_load() checks for added-but-not-initialized vdevs, so that 4653 * if we lose power at any point in this sequence, the remaining 4654 * steps will be completed the next time we load the pool. 4655 */ 4656 (void) spa_vdev_exit(spa, vd, txg, 0); 4657 4658 mutex_enter(&spa_namespace_lock); 4659 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4660 mutex_exit(&spa_namespace_lock); 4661 4662 return (0); 4663} 4664 4665/* 4666 * Attach a device to a mirror. The arguments are the path to any device 4667 * in the mirror, and the nvroot for the new device. If the path specifies 4668 * a device that is not mirrored, we automatically insert the mirror vdev. 4669 * 4670 * If 'replacing' is specified, the new device is intended to replace the 4671 * existing device; in this case the two devices are made into their own 4672 * mirror using the 'replacing' vdev, which is functionally identical to 4673 * the mirror vdev (it actually reuses all the same ops) but has a few 4674 * extra rules: you can't attach to it after it's been created, and upon 4675 * completion of resilvering, the first disk (the one being replaced) 4676 * is automatically detached. 4677 */ 4678int 4679spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 4680{ 4681 uint64_t txg, dtl_max_txg; 4682 vdev_t *rvd = spa->spa_root_vdev; 4683 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 4684 vdev_ops_t *pvops; 4685 char *oldvdpath, *newvdpath; 4686 int newvd_isspare; 4687 int error; 4688 4689 ASSERT(spa_writeable(spa)); 4690 4691 txg = spa_vdev_enter(spa); 4692 4693 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 4694 4695 if (oldvd == NULL) 4696 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4697 4698 if (!oldvd->vdev_ops->vdev_op_leaf) 4699 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4700 4701 pvd = oldvd->vdev_parent; 4702 4703 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 4704 VDEV_ALLOC_ATTACH)) != 0) 4705 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4706 4707 if (newrootvd->vdev_children != 1) 4708 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4709 4710 newvd = newrootvd->vdev_child[0]; 4711 4712 if (!newvd->vdev_ops->vdev_op_leaf) 4713 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4714 4715 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 4716 return (spa_vdev_exit(spa, newrootvd, txg, error)); 4717 4718 /* 4719 * Spares can't replace logs 4720 */ 4721 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 4722 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4723 4724 if (!replacing) { 4725 /* 4726 * For attach, the only allowable parent is a mirror or the root 4727 * vdev. 4728 */ 4729 if (pvd->vdev_ops != &vdev_mirror_ops && 4730 pvd->vdev_ops != &vdev_root_ops) 4731 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4732 4733 pvops = &vdev_mirror_ops; 4734 } else { 4735 /* 4736 * Active hot spares can only be replaced by inactive hot 4737 * spares. 4738 */ 4739 if (pvd->vdev_ops == &vdev_spare_ops && 4740 oldvd->vdev_isspare && 4741 !spa_has_spare(spa, newvd->vdev_guid)) 4742 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4743 4744 /* 4745 * If the source is a hot spare, and the parent isn't already a 4746 * spare, then we want to create a new hot spare. Otherwise, we 4747 * want to create a replacing vdev. The user is not allowed to 4748 * attach to a spared vdev child unless the 'isspare' state is 4749 * the same (spare replaces spare, non-spare replaces 4750 * non-spare). 4751 */ 4752 if (pvd->vdev_ops == &vdev_replacing_ops && 4753 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 4754 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4755 } else if (pvd->vdev_ops == &vdev_spare_ops && 4756 newvd->vdev_isspare != oldvd->vdev_isspare) { 4757 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4758 } 4759 4760 if (newvd->vdev_isspare) 4761 pvops = &vdev_spare_ops; 4762 else 4763 pvops = &vdev_replacing_ops; 4764 } 4765 4766 /* 4767 * Make sure the new device is big enough. 4768 */ 4769 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 4770 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 4771 4772 /* 4773 * The new device cannot have a higher alignment requirement 4774 * than the top-level vdev. 4775 */ 4776 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 4777 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 4778 4779 /* 4780 * If this is an in-place replacement, update oldvd's path and devid 4781 * to make it distinguishable from newvd, and unopenable from now on. 4782 */ 4783 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 4784 spa_strfree(oldvd->vdev_path); 4785 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 4786 KM_SLEEP); 4787 (void) sprintf(oldvd->vdev_path, "%s/%s", 4788 newvd->vdev_path, "old"); 4789 if (oldvd->vdev_devid != NULL) { 4790 spa_strfree(oldvd->vdev_devid); 4791 oldvd->vdev_devid = NULL; 4792 } 4793 } 4794 4795 /* mark the device being resilvered */ 4796 newvd->vdev_resilver_txg = txg; 4797 4798 /* 4799 * If the parent is not a mirror, or if we're replacing, insert the new 4800 * mirror/replacing/spare vdev above oldvd. 4801 */ 4802 if (pvd->vdev_ops != pvops) 4803 pvd = vdev_add_parent(oldvd, pvops); 4804 4805 ASSERT(pvd->vdev_top->vdev_parent == rvd); 4806 ASSERT(pvd->vdev_ops == pvops); 4807 ASSERT(oldvd->vdev_parent == pvd); 4808 4809 /* 4810 * Extract the new device from its root and add it to pvd. 4811 */ 4812 vdev_remove_child(newrootvd, newvd); 4813 newvd->vdev_id = pvd->vdev_children; 4814 newvd->vdev_crtxg = oldvd->vdev_crtxg; 4815 vdev_add_child(pvd, newvd); 4816 4817 tvd = newvd->vdev_top; 4818 ASSERT(pvd->vdev_top == tvd); 4819 ASSERT(tvd->vdev_parent == rvd); 4820 4821 vdev_config_dirty(tvd); 4822 4823 /* 4824 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 4825 * for any dmu_sync-ed blocks. It will propagate upward when 4826 * spa_vdev_exit() calls vdev_dtl_reassess(). 4827 */ 4828 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 4829 4830 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 4831 dtl_max_txg - TXG_INITIAL); 4832 4833 if (newvd->vdev_isspare) { 4834 spa_spare_activate(newvd); 4835 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE); 4836 } 4837 4838 oldvdpath = spa_strdup(oldvd->vdev_path); 4839 newvdpath = spa_strdup(newvd->vdev_path); 4840 newvd_isspare = newvd->vdev_isspare; 4841 4842 /* 4843 * Mark newvd's DTL dirty in this txg. 4844 */ 4845 vdev_dirty(tvd, VDD_DTL, newvd, txg); 4846 4847 /* 4848 * Schedule the resilver to restart in the future. We do this to 4849 * ensure that dmu_sync-ed blocks have been stitched into the 4850 * respective datasets. 4851 */ 4852 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); 4853 4854 /* 4855 * Commit the config 4856 */ 4857 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 4858 4859 spa_history_log_internal(spa, "vdev attach", NULL, 4860 "%s vdev=%s %s vdev=%s", 4861 replacing && newvd_isspare ? "spare in" : 4862 replacing ? "replace" : "attach", newvdpath, 4863 replacing ? "for" : "to", oldvdpath); 4864 4865 spa_strfree(oldvdpath); 4866 spa_strfree(newvdpath); 4867 4868 if (spa->spa_bootfs) 4869 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH); 4870 4871 return (0); 4872} 4873 4874/* 4875 * Detach a device from a mirror or replacing vdev. 4876 * 4877 * If 'replace_done' is specified, only detach if the parent 4878 * is a replacing vdev. 4879 */ 4880int 4881spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 4882{ 4883 uint64_t txg; 4884 int error; 4885 vdev_t *rvd = spa->spa_root_vdev; 4886 vdev_t *vd, *pvd, *cvd, *tvd; 4887 boolean_t unspare = B_FALSE; 4888 uint64_t unspare_guid = 0; 4889 char *vdpath; 4890 4891 ASSERT(spa_writeable(spa)); 4892 4893 txg = spa_vdev_enter(spa); 4894 4895 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 4896 4897 if (vd == NULL) 4898 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4899 4900 if (!vd->vdev_ops->vdev_op_leaf) 4901 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4902 4903 pvd = vd->vdev_parent; 4904 4905 /* 4906 * If the parent/child relationship is not as expected, don't do it. 4907 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 4908 * vdev that's replacing B with C. The user's intent in replacing 4909 * is to go from M(A,B) to M(A,C). If the user decides to cancel 4910 * the replace by detaching C, the expected behavior is to end up 4911 * M(A,B). But suppose that right after deciding to detach C, 4912 * the replacement of B completes. We would have M(A,C), and then 4913 * ask to detach C, which would leave us with just A -- not what 4914 * the user wanted. To prevent this, we make sure that the 4915 * parent/child relationship hasn't changed -- in this example, 4916 * that C's parent is still the replacing vdev R. 4917 */ 4918 if (pvd->vdev_guid != pguid && pguid != 0) 4919 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4920 4921 /* 4922 * Only 'replacing' or 'spare' vdevs can be replaced. 4923 */ 4924 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 4925 pvd->vdev_ops != &vdev_spare_ops) 4926 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4927 4928 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 4929 spa_version(spa) >= SPA_VERSION_SPARES); 4930 4931 /* 4932 * Only mirror, replacing, and spare vdevs support detach. 4933 */ 4934 if (pvd->vdev_ops != &vdev_replacing_ops && 4935 pvd->vdev_ops != &vdev_mirror_ops && 4936 pvd->vdev_ops != &vdev_spare_ops) 4937 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4938 4939 /* 4940 * If this device has the only valid copy of some data, 4941 * we cannot safely detach it. 4942 */ 4943 if (vdev_dtl_required(vd)) 4944 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4945 4946 ASSERT(pvd->vdev_children >= 2); 4947 4948 /* 4949 * If we are detaching the second disk from a replacing vdev, then 4950 * check to see if we changed the original vdev's path to have "/old" 4951 * at the end in spa_vdev_attach(). If so, undo that change now. 4952 */ 4953 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 4954 vd->vdev_path != NULL) { 4955 size_t len = strlen(vd->vdev_path); 4956 4957 for (int c = 0; c < pvd->vdev_children; c++) { 4958 cvd = pvd->vdev_child[c]; 4959 4960 if (cvd == vd || cvd->vdev_path == NULL) 4961 continue; 4962 4963 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 4964 strcmp(cvd->vdev_path + len, "/old") == 0) { 4965 spa_strfree(cvd->vdev_path); 4966 cvd->vdev_path = spa_strdup(vd->vdev_path); 4967 break; 4968 } 4969 } 4970 } 4971 4972 /* 4973 * If we are detaching the original disk from a spare, then it implies 4974 * that the spare should become a real disk, and be removed from the 4975 * active spare list for the pool. 4976 */ 4977 if (pvd->vdev_ops == &vdev_spare_ops && 4978 vd->vdev_id == 0 && 4979 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 4980 unspare = B_TRUE; 4981 4982 /* 4983 * Erase the disk labels so the disk can be used for other things. 4984 * This must be done after all other error cases are handled, 4985 * but before we disembowel vd (so we can still do I/O to it). 4986 * But if we can't do it, don't treat the error as fatal -- 4987 * it may be that the unwritability of the disk is the reason 4988 * it's being detached! 4989 */ 4990 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 4991 4992 /* 4993 * Remove vd from its parent and compact the parent's children. 4994 */ 4995 vdev_remove_child(pvd, vd); 4996 vdev_compact_children(pvd); 4997 4998 /* 4999 * Remember one of the remaining children so we can get tvd below. 5000 */ 5001 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 5002 5003 /* 5004 * If we need to remove the remaining child from the list of hot spares, 5005 * do it now, marking the vdev as no longer a spare in the process. 5006 * We must do this before vdev_remove_parent(), because that can 5007 * change the GUID if it creates a new toplevel GUID. For a similar 5008 * reason, we must remove the spare now, in the same txg as the detach; 5009 * otherwise someone could attach a new sibling, change the GUID, and 5010 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 5011 */ 5012 if (unspare) { 5013 ASSERT(cvd->vdev_isspare); 5014 spa_spare_remove(cvd); 5015 unspare_guid = cvd->vdev_guid; 5016 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 5017 cvd->vdev_unspare = B_TRUE; 5018 } 5019 5020 /* 5021 * If the parent mirror/replacing vdev only has one child, 5022 * the parent is no longer needed. Remove it from the tree. 5023 */ 5024 if (pvd->vdev_children == 1) { 5025 if (pvd->vdev_ops == &vdev_spare_ops) 5026 cvd->vdev_unspare = B_FALSE; 5027 vdev_remove_parent(cvd); 5028 } 5029 5030 5031 /* 5032 * We don't set tvd until now because the parent we just removed 5033 * may have been the previous top-level vdev. 5034 */ 5035 tvd = cvd->vdev_top; 5036 ASSERT(tvd->vdev_parent == rvd); 5037 5038 /* 5039 * Reevaluate the parent vdev state. 5040 */ 5041 vdev_propagate_state(cvd); 5042 5043 /* 5044 * If the 'autoexpand' property is set on the pool then automatically 5045 * try to expand the size of the pool. For example if the device we 5046 * just detached was smaller than the others, it may be possible to 5047 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 5048 * first so that we can obtain the updated sizes of the leaf vdevs. 5049 */ 5050 if (spa->spa_autoexpand) { 5051 vdev_reopen(tvd); 5052 vdev_expand(tvd, txg); 5053 } 5054 5055 vdev_config_dirty(tvd); 5056 5057 /* 5058 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 5059 * vd->vdev_detached is set and free vd's DTL object in syncing context. 5060 * But first make sure we're not on any *other* txg's DTL list, to 5061 * prevent vd from being accessed after it's freed. 5062 */ 5063 vdpath = spa_strdup(vd->vdev_path); 5064 for (int t = 0; t < TXG_SIZE; t++) 5065 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 5066 vd->vdev_detached = B_TRUE; 5067 vdev_dirty(tvd, VDD_DTL, vd, txg); 5068 5069 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE); 5070 5071 /* hang on to the spa before we release the lock */ 5072 spa_open_ref(spa, FTAG); 5073 5074 error = spa_vdev_exit(spa, vd, txg, 0); 5075 5076 spa_history_log_internal(spa, "detach", NULL, 5077 "vdev=%s", vdpath); 5078 spa_strfree(vdpath); 5079 5080 /* 5081 * If this was the removal of the original device in a hot spare vdev, 5082 * then we want to go through and remove the device from the hot spare 5083 * list of every other pool. 5084 */ 5085 if (unspare) { 5086 spa_t *altspa = NULL; 5087 5088 mutex_enter(&spa_namespace_lock); 5089 while ((altspa = spa_next(altspa)) != NULL) { 5090 if (altspa->spa_state != POOL_STATE_ACTIVE || 5091 altspa == spa) 5092 continue; 5093 5094 spa_open_ref(altspa, FTAG); 5095 mutex_exit(&spa_namespace_lock); 5096 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 5097 mutex_enter(&spa_namespace_lock); 5098 spa_close(altspa, FTAG); 5099 } 5100 mutex_exit(&spa_namespace_lock); 5101 5102 /* search the rest of the vdevs for spares to remove */ 5103 spa_vdev_resilver_done(spa); 5104 } 5105 5106 /* all done with the spa; OK to release */ 5107 mutex_enter(&spa_namespace_lock); 5108 spa_close(spa, FTAG); 5109 mutex_exit(&spa_namespace_lock); 5110 5111 return (error); 5112} 5113 5114/* 5115 * Split a set of devices from their mirrors, and create a new pool from them. 5116 */ 5117int 5118spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 5119 nvlist_t *props, boolean_t exp) 5120{ 5121 int error = 0; 5122 uint64_t txg, *glist; 5123 spa_t *newspa; 5124 uint_t c, children, lastlog; 5125 nvlist_t **child, *nvl, *tmp; 5126 dmu_tx_t *tx; 5127 char *altroot = NULL; 5128 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 5129 boolean_t activate_slog; 5130 5131 ASSERT(spa_writeable(spa)); 5132 5133 txg = spa_vdev_enter(spa); 5134 5135 /* clear the log and flush everything up to now */ 5136 activate_slog = spa_passivate_log(spa); 5137 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5138 error = spa_offline_log(spa); 5139 txg = spa_vdev_config_enter(spa); 5140 5141 if (activate_slog) 5142 spa_activate_log(spa); 5143 5144 if (error != 0) 5145 return (spa_vdev_exit(spa, NULL, txg, error)); 5146 5147 /* check new spa name before going any further */ 5148 if (spa_lookup(newname) != NULL) 5149 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 5150 5151 /* 5152 * scan through all the children to ensure they're all mirrors 5153 */ 5154 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 5155 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 5156 &children) != 0) 5157 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5158 5159 /* first, check to ensure we've got the right child count */ 5160 rvd = spa->spa_root_vdev; 5161 lastlog = 0; 5162 for (c = 0; c < rvd->vdev_children; c++) { 5163 vdev_t *vd = rvd->vdev_child[c]; 5164 5165 /* don't count the holes & logs as children */ 5166 if (vd->vdev_islog || vd->vdev_ishole) { 5167 if (lastlog == 0) 5168 lastlog = c; 5169 continue; 5170 } 5171 5172 lastlog = 0; 5173 } 5174 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 5175 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5176 5177 /* next, ensure no spare or cache devices are part of the split */ 5178 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 5179 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 5180 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5181 5182 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 5183 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 5184 5185 /* then, loop over each vdev and validate it */ 5186 for (c = 0; c < children; c++) { 5187 uint64_t is_hole = 0; 5188 5189 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 5190 &is_hole); 5191 5192 if (is_hole != 0) { 5193 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 5194 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 5195 continue; 5196 } else { 5197 error = SET_ERROR(EINVAL); 5198 break; 5199 } 5200 } 5201 5202 /* which disk is going to be split? */ 5203 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 5204 &glist[c]) != 0) { 5205 error = SET_ERROR(EINVAL); 5206 break; 5207 } 5208 5209 /* look it up in the spa */ 5210 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 5211 if (vml[c] == NULL) { 5212 error = SET_ERROR(ENODEV); 5213 break; 5214 } 5215 5216 /* make sure there's nothing stopping the split */ 5217 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 5218 vml[c]->vdev_islog || 5219 vml[c]->vdev_ishole || 5220 vml[c]->vdev_isspare || 5221 vml[c]->vdev_isl2cache || 5222 !vdev_writeable(vml[c]) || 5223 vml[c]->vdev_children != 0 || 5224 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 5225 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 5226 error = SET_ERROR(EINVAL); 5227 break; 5228 } 5229 5230 if (vdev_dtl_required(vml[c])) { 5231 error = SET_ERROR(EBUSY); 5232 break; 5233 } 5234 5235 /* we need certain info from the top level */ 5236 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 5237 vml[c]->vdev_top->vdev_ms_array) == 0); 5238 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 5239 vml[c]->vdev_top->vdev_ms_shift) == 0); 5240 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 5241 vml[c]->vdev_top->vdev_asize) == 0); 5242 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 5243 vml[c]->vdev_top->vdev_ashift) == 0); 5244 } 5245 5246 if (error != 0) { 5247 kmem_free(vml, children * sizeof (vdev_t *)); 5248 kmem_free(glist, children * sizeof (uint64_t)); 5249 return (spa_vdev_exit(spa, NULL, txg, error)); 5250 } 5251 5252 /* stop writers from using the disks */ 5253 for (c = 0; c < children; c++) { 5254 if (vml[c] != NULL) 5255 vml[c]->vdev_offline = B_TRUE; 5256 } 5257 vdev_reopen(spa->spa_root_vdev); 5258 5259 /* 5260 * Temporarily record the splitting vdevs in the spa config. This 5261 * will disappear once the config is regenerated. 5262 */ 5263 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5264 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 5265 glist, children) == 0); 5266 kmem_free(glist, children * sizeof (uint64_t)); 5267 5268 mutex_enter(&spa->spa_props_lock); 5269 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 5270 nvl) == 0); 5271 mutex_exit(&spa->spa_props_lock); 5272 spa->spa_config_splitting = nvl; 5273 vdev_config_dirty(spa->spa_root_vdev); 5274 5275 /* configure and create the new pool */ 5276 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 5277 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 5278 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 5279 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 5280 spa_version(spa)) == 0); 5281 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 5282 spa->spa_config_txg) == 0); 5283 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 5284 spa_generate_guid(NULL)) == 0); 5285 (void) nvlist_lookup_string(props, 5286 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5287 5288 /* add the new pool to the namespace */ 5289 newspa = spa_add(newname, config, altroot); 5290 newspa->spa_config_txg = spa->spa_config_txg; 5291 spa_set_log_state(newspa, SPA_LOG_CLEAR); 5292 5293 /* release the spa config lock, retaining the namespace lock */ 5294 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5295 5296 if (zio_injection_enabled) 5297 zio_handle_panic_injection(spa, FTAG, 1); 5298 5299 spa_activate(newspa, spa_mode_global); 5300 spa_async_suspend(newspa); 5301 5302#ifndef sun 5303 /* mark that we are creating new spa by splitting */ 5304 newspa->spa_splitting_newspa = B_TRUE; 5305#endif 5306 /* create the new pool from the disks of the original pool */ 5307 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); 5308#ifndef sun 5309 newspa->spa_splitting_newspa = B_FALSE; 5310#endif 5311 if (error) 5312 goto out; 5313 5314 /* if that worked, generate a real config for the new pool */ 5315 if (newspa->spa_root_vdev != NULL) { 5316 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 5317 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5318 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 5319 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 5320 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 5321 B_TRUE)); 5322 } 5323 5324 /* set the props */ 5325 if (props != NULL) { 5326 spa_configfile_set(newspa, props, B_FALSE); 5327 error = spa_prop_set(newspa, props); 5328 if (error) 5329 goto out; 5330 } 5331 5332 /* flush everything */ 5333 txg = spa_vdev_config_enter(newspa); 5334 vdev_config_dirty(newspa->spa_root_vdev); 5335 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 5336 5337 if (zio_injection_enabled) 5338 zio_handle_panic_injection(spa, FTAG, 2); 5339 5340 spa_async_resume(newspa); 5341 5342 /* finally, update the original pool's config */ 5343 txg = spa_vdev_config_enter(spa); 5344 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 5345 error = dmu_tx_assign(tx, TXG_WAIT); 5346 if (error != 0) 5347 dmu_tx_abort(tx); 5348 for (c = 0; c < children; c++) { 5349 if (vml[c] != NULL) { 5350 vdev_split(vml[c]); 5351 if (error == 0) 5352 spa_history_log_internal(spa, "detach", tx, 5353 "vdev=%s", vml[c]->vdev_path); 5354 vdev_free(vml[c]); 5355 } 5356 } 5357 vdev_config_dirty(spa->spa_root_vdev); 5358 spa->spa_config_splitting = NULL; 5359 nvlist_free(nvl); 5360 if (error == 0) 5361 dmu_tx_commit(tx); 5362 (void) spa_vdev_exit(spa, NULL, txg, 0); 5363 5364 if (zio_injection_enabled) 5365 zio_handle_panic_injection(spa, FTAG, 3); 5366 5367 /* split is complete; log a history record */ 5368 spa_history_log_internal(newspa, "split", NULL, 5369 "from pool %s", spa_name(spa)); 5370 5371 kmem_free(vml, children * sizeof (vdev_t *)); 5372 5373 /* if we're not going to mount the filesystems in userland, export */ 5374 if (exp) 5375 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 5376 B_FALSE, B_FALSE); 5377 5378 return (error); 5379 5380out: 5381 spa_unload(newspa); 5382 spa_deactivate(newspa); 5383 spa_remove(newspa); 5384 5385 txg = spa_vdev_config_enter(spa); 5386 5387 /* re-online all offlined disks */ 5388 for (c = 0; c < children; c++) { 5389 if (vml[c] != NULL) 5390 vml[c]->vdev_offline = B_FALSE; 5391 } 5392 vdev_reopen(spa->spa_root_vdev); 5393 5394 nvlist_free(spa->spa_config_splitting); 5395 spa->spa_config_splitting = NULL; 5396 (void) spa_vdev_exit(spa, NULL, txg, error); 5397 5398 kmem_free(vml, children * sizeof (vdev_t *)); 5399 return (error); 5400} 5401 5402static nvlist_t * 5403spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) 5404{ 5405 for (int i = 0; i < count; i++) { 5406 uint64_t guid; 5407 5408 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, 5409 &guid) == 0); 5410 5411 if (guid == target_guid) 5412 return (nvpp[i]); 5413 } 5414 5415 return (NULL); 5416} 5417 5418static void 5419spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, 5420 nvlist_t *dev_to_remove) 5421{ 5422 nvlist_t **newdev = NULL; 5423 5424 if (count > 1) 5425 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); 5426 5427 for (int i = 0, j = 0; i < count; i++) { 5428 if (dev[i] == dev_to_remove) 5429 continue; 5430 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); 5431 } 5432 5433 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); 5434 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); 5435 5436 for (int i = 0; i < count - 1; i++) 5437 nvlist_free(newdev[i]); 5438 5439 if (count > 1) 5440 kmem_free(newdev, (count - 1) * sizeof (void *)); 5441} 5442 5443/* 5444 * Evacuate the device. 5445 */ 5446static int 5447spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) 5448{ 5449 uint64_t txg; 5450 int error = 0; 5451 5452 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5453 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5454 ASSERT(vd == vd->vdev_top); 5455 5456 /* 5457 * Evacuate the device. We don't hold the config lock as writer 5458 * since we need to do I/O but we do keep the 5459 * spa_namespace_lock held. Once this completes the device 5460 * should no longer have any blocks allocated on it. 5461 */ 5462 if (vd->vdev_islog) { 5463 if (vd->vdev_stat.vs_alloc != 0) 5464 error = spa_offline_log(spa); 5465 } else { 5466 error = SET_ERROR(ENOTSUP); 5467 } 5468 5469 if (error) 5470 return (error); 5471 5472 /* 5473 * The evacuation succeeded. Remove any remaining MOS metadata 5474 * associated with this vdev, and wait for these changes to sync. 5475 */ 5476 ASSERT0(vd->vdev_stat.vs_alloc); 5477 txg = spa_vdev_config_enter(spa); 5478 vd->vdev_removing = B_TRUE; 5479 vdev_dirty_leaves(vd, VDD_DTL, txg); 5480 vdev_config_dirty(vd); 5481 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5482 5483 return (0); 5484} 5485 5486/* 5487 * Complete the removal by cleaning up the namespace. 5488 */ 5489static void 5490spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd) 5491{ 5492 vdev_t *rvd = spa->spa_root_vdev; 5493 uint64_t id = vd->vdev_id; 5494 boolean_t last_vdev = (id == (rvd->vdev_children - 1)); 5495 5496 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5497 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 5498 ASSERT(vd == vd->vdev_top); 5499 5500 /* 5501 * Only remove any devices which are empty. 5502 */ 5503 if (vd->vdev_stat.vs_alloc != 0) 5504 return; 5505 5506 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 5507 5508 if (list_link_active(&vd->vdev_state_dirty_node)) 5509 vdev_state_clean(vd); 5510 if (list_link_active(&vd->vdev_config_dirty_node)) 5511 vdev_config_clean(vd); 5512 5513 vdev_free(vd); 5514 5515 if (last_vdev) { 5516 vdev_compact_children(rvd); 5517 } else { 5518 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); 5519 vdev_add_child(rvd, vd); 5520 } 5521 vdev_config_dirty(rvd); 5522 5523 /* 5524 * Reassess the health of our root vdev. 5525 */ 5526 vdev_reopen(rvd); 5527} 5528 5529/* 5530 * Remove a device from the pool - 5531 * 5532 * Removing a device from the vdev namespace requires several steps 5533 * and can take a significant amount of time. As a result we use 5534 * the spa_vdev_config_[enter/exit] functions which allow us to 5535 * grab and release the spa_config_lock while still holding the namespace 5536 * lock. During each step the configuration is synced out. 5537 * 5538 * Currently, this supports removing only hot spares, slogs, and level 2 ARC 5539 * devices. 5540 */ 5541int 5542spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) 5543{ 5544 vdev_t *vd; 5545 metaslab_group_t *mg; 5546 nvlist_t **spares, **l2cache, *nv; 5547 uint64_t txg = 0; 5548 uint_t nspares, nl2cache; 5549 int error = 0; 5550 boolean_t locked = MUTEX_HELD(&spa_namespace_lock); 5551 5552 ASSERT(spa_writeable(spa)); 5553 5554 if (!locked) 5555 txg = spa_vdev_enter(spa); 5556 5557 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 5558 5559 if (spa->spa_spares.sav_vdevs != NULL && 5560 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 5561 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && 5562 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { 5563 /* 5564 * Only remove the hot spare if it's not currently in use 5565 * in this pool. 5566 */ 5567 if (vd == NULL || unspare) { 5568 spa_vdev_remove_aux(spa->spa_spares.sav_config, 5569 ZPOOL_CONFIG_SPARES, spares, nspares, nv); 5570 spa_load_spares(spa); 5571 spa->spa_spares.sav_sync = B_TRUE; 5572 } else { 5573 error = SET_ERROR(EBUSY); 5574 } 5575 } else if (spa->spa_l2cache.sav_vdevs != NULL && 5576 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 5577 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && 5578 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { 5579 /* 5580 * Cache devices can always be removed. 5581 */ 5582 spa_vdev_remove_aux(spa->spa_l2cache.sav_config, 5583 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); 5584 spa_load_l2cache(spa); 5585 spa->spa_l2cache.sav_sync = B_TRUE; 5586 } else if (vd != NULL && vd->vdev_islog) { 5587 ASSERT(!locked); 5588 ASSERT(vd == vd->vdev_top); 5589 5590 mg = vd->vdev_mg; 5591 5592 /* 5593 * Stop allocating from this vdev. 5594 */ 5595 metaslab_group_passivate(mg); 5596 5597 /* 5598 * Wait for the youngest allocations and frees to sync, 5599 * and then wait for the deferral of those frees to finish. 5600 */ 5601 spa_vdev_config_exit(spa, NULL, 5602 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); 5603 5604 /* 5605 * Attempt to evacuate the vdev. 5606 */ 5607 error = spa_vdev_remove_evacuate(spa, vd); 5608 5609 txg = spa_vdev_config_enter(spa); 5610 5611 /* 5612 * If we couldn't evacuate the vdev, unwind. 5613 */ 5614 if (error) { 5615 metaslab_group_activate(mg); 5616 return (spa_vdev_exit(spa, NULL, txg, error)); 5617 } 5618 5619 /* 5620 * Clean up the vdev namespace. 5621 */ 5622 spa_vdev_remove_from_namespace(spa, vd); 5623 5624 } else if (vd != NULL) { 5625 /* 5626 * Normal vdevs cannot be removed (yet). 5627 */ 5628 error = SET_ERROR(ENOTSUP); 5629 } else { 5630 /* 5631 * There is no vdev of any kind with the specified guid. 5632 */ 5633 error = SET_ERROR(ENOENT); 5634 } 5635 5636 if (!locked) 5637 return (spa_vdev_exit(spa, NULL, txg, error)); 5638 5639 return (error); 5640} 5641 5642/* 5643 * Find any device that's done replacing, or a vdev marked 'unspare' that's 5644 * currently spared, so we can detach it. 5645 */ 5646static vdev_t * 5647spa_vdev_resilver_done_hunt(vdev_t *vd) 5648{ 5649 vdev_t *newvd, *oldvd; 5650 5651 for (int c = 0; c < vd->vdev_children; c++) { 5652 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 5653 if (oldvd != NULL) 5654 return (oldvd); 5655 } 5656 5657 /* 5658 * Check for a completed replacement. We always consider the first 5659 * vdev in the list to be the oldest vdev, and the last one to be 5660 * the newest (see spa_vdev_attach() for how that works). In 5661 * the case where the newest vdev is faulted, we will not automatically 5662 * remove it after a resilver completes. This is OK as it will require 5663 * user intervention to determine which disk the admin wishes to keep. 5664 */ 5665 if (vd->vdev_ops == &vdev_replacing_ops) { 5666 ASSERT(vd->vdev_children > 1); 5667 5668 newvd = vd->vdev_child[vd->vdev_children - 1]; 5669 oldvd = vd->vdev_child[0]; 5670 5671 if (vdev_dtl_empty(newvd, DTL_MISSING) && 5672 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5673 !vdev_dtl_required(oldvd)) 5674 return (oldvd); 5675 } 5676 5677 /* 5678 * Check for a completed resilver with the 'unspare' flag set. 5679 */ 5680 if (vd->vdev_ops == &vdev_spare_ops) { 5681 vdev_t *first = vd->vdev_child[0]; 5682 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 5683 5684 if (last->vdev_unspare) { 5685 oldvd = first; 5686 newvd = last; 5687 } else if (first->vdev_unspare) { 5688 oldvd = last; 5689 newvd = first; 5690 } else { 5691 oldvd = NULL; 5692 } 5693 5694 if (oldvd != NULL && 5695 vdev_dtl_empty(newvd, DTL_MISSING) && 5696 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5697 !vdev_dtl_required(oldvd)) 5698 return (oldvd); 5699 5700 /* 5701 * If there are more than two spares attached to a disk, 5702 * and those spares are not required, then we want to 5703 * attempt to free them up now so that they can be used 5704 * by other pools. Once we're back down to a single 5705 * disk+spare, we stop removing them. 5706 */ 5707 if (vd->vdev_children > 2) { 5708 newvd = vd->vdev_child[1]; 5709 5710 if (newvd->vdev_isspare && last->vdev_isspare && 5711 vdev_dtl_empty(last, DTL_MISSING) && 5712 vdev_dtl_empty(last, DTL_OUTAGE) && 5713 !vdev_dtl_required(newvd)) 5714 return (newvd); 5715 } 5716 } 5717 5718 return (NULL); 5719} 5720 5721static void 5722spa_vdev_resilver_done(spa_t *spa) 5723{ 5724 vdev_t *vd, *pvd, *ppvd; 5725 uint64_t guid, sguid, pguid, ppguid; 5726 5727 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5728 5729 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 5730 pvd = vd->vdev_parent; 5731 ppvd = pvd->vdev_parent; 5732 guid = vd->vdev_guid; 5733 pguid = pvd->vdev_guid; 5734 ppguid = ppvd->vdev_guid; 5735 sguid = 0; 5736 /* 5737 * If we have just finished replacing a hot spared device, then 5738 * we need to detach the parent's first child (the original hot 5739 * spare) as well. 5740 */ 5741 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 5742 ppvd->vdev_children == 2) { 5743 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 5744 sguid = ppvd->vdev_child[1]->vdev_guid; 5745 } 5746 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); 5747 5748 spa_config_exit(spa, SCL_ALL, FTAG); 5749 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 5750 return; 5751 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 5752 return; 5753 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5754 } 5755 5756 spa_config_exit(spa, SCL_ALL, FTAG); 5757} 5758 5759/* 5760 * Update the stored path or FRU for this vdev. 5761 */ 5762int 5763spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 5764 boolean_t ispath) 5765{ 5766 vdev_t *vd; 5767 boolean_t sync = B_FALSE; 5768 5769 ASSERT(spa_writeable(spa)); 5770 5771 spa_vdev_state_enter(spa, SCL_ALL); 5772 5773 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 5774 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 5775 5776 if (!vd->vdev_ops->vdev_op_leaf) 5777 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 5778 5779 if (ispath) { 5780 if (strcmp(value, vd->vdev_path) != 0) { 5781 spa_strfree(vd->vdev_path); 5782 vd->vdev_path = spa_strdup(value); 5783 sync = B_TRUE; 5784 } 5785 } else { 5786 if (vd->vdev_fru == NULL) { 5787 vd->vdev_fru = spa_strdup(value); 5788 sync = B_TRUE; 5789 } else if (strcmp(value, vd->vdev_fru) != 0) { 5790 spa_strfree(vd->vdev_fru); 5791 vd->vdev_fru = spa_strdup(value); 5792 sync = B_TRUE; 5793 } 5794 } 5795 5796 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 5797} 5798 5799int 5800spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 5801{ 5802 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 5803} 5804 5805int 5806spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 5807{ 5808 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 5809} 5810 5811/* 5812 * ========================================================================== 5813 * SPA Scanning 5814 * ========================================================================== 5815 */ 5816 5817int 5818spa_scan_stop(spa_t *spa) 5819{ 5820 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5821 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 5822 return (SET_ERROR(EBUSY)); 5823 return (dsl_scan_cancel(spa->spa_dsl_pool)); 5824} 5825 5826int 5827spa_scan(spa_t *spa, pool_scan_func_t func) 5828{ 5829 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5830 5831 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 5832 return (SET_ERROR(ENOTSUP)); 5833 5834 /* 5835 * If a resilver was requested, but there is no DTL on a 5836 * writeable leaf device, we have nothing to do. 5837 */ 5838 if (func == POOL_SCAN_RESILVER && 5839 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 5840 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 5841 return (0); 5842 } 5843 5844 return (dsl_scan(spa->spa_dsl_pool, func)); 5845} 5846 5847/* 5848 * ========================================================================== 5849 * SPA async task processing 5850 * ========================================================================== 5851 */ 5852 5853static void 5854spa_async_remove(spa_t *spa, vdev_t *vd) 5855{ 5856 if (vd->vdev_remove_wanted) { 5857 vd->vdev_remove_wanted = B_FALSE; 5858 vd->vdev_delayed_close = B_FALSE; 5859 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 5860 5861 /* 5862 * We want to clear the stats, but we don't want to do a full 5863 * vdev_clear() as that will cause us to throw away 5864 * degraded/faulted state as well as attempt to reopen the 5865 * device, all of which is a waste. 5866 */ 5867 vd->vdev_stat.vs_read_errors = 0; 5868 vd->vdev_stat.vs_write_errors = 0; 5869 vd->vdev_stat.vs_checksum_errors = 0; 5870 5871 vdev_state_dirty(vd->vdev_top); 5872 } 5873 5874 for (int c = 0; c < vd->vdev_children; c++) 5875 spa_async_remove(spa, vd->vdev_child[c]); 5876} 5877 5878static void 5879spa_async_probe(spa_t *spa, vdev_t *vd) 5880{ 5881 if (vd->vdev_probe_wanted) { 5882 vd->vdev_probe_wanted = B_FALSE; 5883 vdev_reopen(vd); /* vdev_open() does the actual probe */ 5884 } 5885 5886 for (int c = 0; c < vd->vdev_children; c++) 5887 spa_async_probe(spa, vd->vdev_child[c]); 5888} 5889 5890static void 5891spa_async_autoexpand(spa_t *spa, vdev_t *vd) 5892{ 5893 sysevent_id_t eid; 5894 nvlist_t *attr; 5895 char *physpath; 5896 5897 if (!spa->spa_autoexpand) 5898 return; 5899 5900 for (int c = 0; c < vd->vdev_children; c++) { 5901 vdev_t *cvd = vd->vdev_child[c]; 5902 spa_async_autoexpand(spa, cvd); 5903 } 5904 5905 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 5906 return; 5907 5908 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 5909 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 5910 5911 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5912 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); 5913 5914 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, 5915 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP); 5916 5917 nvlist_free(attr); 5918 kmem_free(physpath, MAXPATHLEN); 5919} 5920 5921static void 5922spa_async_thread(void *arg) 5923{ 5924 spa_t *spa = arg; 5925 int tasks; 5926 5927 ASSERT(spa->spa_sync_on); 5928 5929 mutex_enter(&spa->spa_async_lock); 5930 tasks = spa->spa_async_tasks; 5931 spa->spa_async_tasks &= SPA_ASYNC_REMOVE; 5932 mutex_exit(&spa->spa_async_lock); 5933 5934 /* 5935 * See if the config needs to be updated. 5936 */ 5937 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 5938 uint64_t old_space, new_space; 5939 5940 mutex_enter(&spa_namespace_lock); 5941 old_space = metaslab_class_get_space(spa_normal_class(spa)); 5942 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5943 new_space = metaslab_class_get_space(spa_normal_class(spa)); 5944 mutex_exit(&spa_namespace_lock); 5945 5946 /* 5947 * If the pool grew as a result of the config update, 5948 * then log an internal history event. 5949 */ 5950 if (new_space != old_space) { 5951 spa_history_log_internal(spa, "vdev online", NULL, 5952 "pool '%s' size: %llu(+%llu)", 5953 spa_name(spa), new_space, new_space - old_space); 5954 } 5955 } 5956 5957 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 5958 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5959 spa_async_autoexpand(spa, spa->spa_root_vdev); 5960 spa_config_exit(spa, SCL_CONFIG, FTAG); 5961 } 5962 5963 /* 5964 * See if any devices need to be probed. 5965 */ 5966 if (tasks & SPA_ASYNC_PROBE) { 5967 spa_vdev_state_enter(spa, SCL_NONE); 5968 spa_async_probe(spa, spa->spa_root_vdev); 5969 (void) spa_vdev_state_exit(spa, NULL, 0); 5970 } 5971 5972 /* 5973 * If any devices are done replacing, detach them. 5974 */ 5975 if (tasks & SPA_ASYNC_RESILVER_DONE) 5976 spa_vdev_resilver_done(spa); 5977 5978 /* 5979 * Kick off a resilver. 5980 */ 5981 if (tasks & SPA_ASYNC_RESILVER) 5982 dsl_resilver_restart(spa->spa_dsl_pool, 0); 5983 5984 /* 5985 * Let the world know that we're done. 5986 */ 5987 mutex_enter(&spa->spa_async_lock); 5988 spa->spa_async_thread = NULL; 5989 cv_broadcast(&spa->spa_async_cv); 5990 mutex_exit(&spa->spa_async_lock); 5991 thread_exit(); 5992} 5993 5994static void 5995spa_async_thread_vd(void *arg) 5996{ 5997 spa_t *spa = arg; 5998 int tasks; 5999 6000 ASSERT(spa->spa_sync_on); 6001 6002 mutex_enter(&spa->spa_async_lock); 6003 tasks = spa->spa_async_tasks; 6004retry: 6005 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE; 6006 mutex_exit(&spa->spa_async_lock); 6007 6008 /* 6009 * See if any devices need to be marked REMOVED. 6010 */ 6011 if (tasks & SPA_ASYNC_REMOVE) { 6012 spa_vdev_state_enter(spa, SCL_NONE); 6013 spa_async_remove(spa, spa->spa_root_vdev); 6014 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 6015 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 6016 for (int i = 0; i < spa->spa_spares.sav_count; i++) 6017 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 6018 (void) spa_vdev_state_exit(spa, NULL, 0); 6019 } 6020 6021 /* 6022 * Let the world know that we're done. 6023 */ 6024 mutex_enter(&spa->spa_async_lock); 6025 tasks = spa->spa_async_tasks; 6026 if ((tasks & SPA_ASYNC_REMOVE) != 0) 6027 goto retry; 6028 spa->spa_async_thread_vd = NULL; 6029 cv_broadcast(&spa->spa_async_cv); 6030 mutex_exit(&spa->spa_async_lock); 6031 thread_exit(); 6032} 6033 6034void 6035spa_async_suspend(spa_t *spa) 6036{ 6037 mutex_enter(&spa->spa_async_lock); 6038 spa->spa_async_suspended++; 6039 while (spa->spa_async_thread != NULL && 6040 spa->spa_async_thread_vd != NULL) 6041 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 6042 mutex_exit(&spa->spa_async_lock); 6043} 6044 6045void 6046spa_async_resume(spa_t *spa) 6047{ 6048 mutex_enter(&spa->spa_async_lock); 6049 ASSERT(spa->spa_async_suspended != 0); 6050 spa->spa_async_suspended--; 6051 mutex_exit(&spa->spa_async_lock); 6052} 6053 6054static boolean_t 6055spa_async_tasks_pending(spa_t *spa) 6056{ 6057 uint_t non_config_tasks; 6058 uint_t config_task; 6059 boolean_t config_task_suspended; 6060 6061 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE | 6062 SPA_ASYNC_REMOVE); 6063 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; 6064 if (spa->spa_ccw_fail_time == 0) { 6065 config_task_suspended = B_FALSE; 6066 } else { 6067 config_task_suspended = 6068 (gethrtime() - spa->spa_ccw_fail_time) < 6069 (zfs_ccw_retry_interval * NANOSEC); 6070 } 6071 6072 return (non_config_tasks || (config_task && !config_task_suspended)); 6073} 6074 6075static void 6076spa_async_dispatch(spa_t *spa) 6077{ 6078 mutex_enter(&spa->spa_async_lock); 6079 if (spa_async_tasks_pending(spa) && 6080 !spa->spa_async_suspended && 6081 spa->spa_async_thread == NULL && 6082 rootdir != NULL) 6083 spa->spa_async_thread = thread_create(NULL, 0, 6084 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 6085 mutex_exit(&spa->spa_async_lock); 6086} 6087 6088static void 6089spa_async_dispatch_vd(spa_t *spa) 6090{ 6091 mutex_enter(&spa->spa_async_lock); 6092 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 && 6093 !spa->spa_async_suspended && 6094 spa->spa_async_thread_vd == NULL && 6095 rootdir != NULL) 6096 spa->spa_async_thread_vd = thread_create(NULL, 0, 6097 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri); 6098 mutex_exit(&spa->spa_async_lock); 6099} 6100 6101void 6102spa_async_request(spa_t *spa, int task) 6103{ 6104 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 6105 mutex_enter(&spa->spa_async_lock); 6106 spa->spa_async_tasks |= task; 6107 mutex_exit(&spa->spa_async_lock); 6108 spa_async_dispatch_vd(spa); 6109} 6110 6111/* 6112 * ========================================================================== 6113 * SPA syncing routines 6114 * ========================================================================== 6115 */ 6116 6117static int 6118bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6119{ 6120 bpobj_t *bpo = arg; 6121 bpobj_enqueue(bpo, bp, tx); 6122 return (0); 6123} 6124 6125static int 6126spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6127{ 6128 zio_t *zio = arg; 6129 6130 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 6131 BP_GET_PSIZE(bp), zio->io_flags)); 6132 return (0); 6133} 6134 6135/* 6136 * Note: this simple function is not inlined to make it easier to dtrace the 6137 * amount of time spent syncing frees. 6138 */ 6139static void 6140spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) 6141{ 6142 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6143 bplist_iterate(bpl, spa_free_sync_cb, zio, tx); 6144 VERIFY(zio_wait(zio) == 0); 6145} 6146 6147/* 6148 * Note: this simple function is not inlined to make it easier to dtrace the 6149 * amount of time spent syncing deferred frees. 6150 */ 6151static void 6152spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) 6153{ 6154 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6155 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, 6156 spa_free_sync_cb, zio, tx), ==, 0); 6157 VERIFY0(zio_wait(zio)); 6158} 6159 6160 6161static void 6162spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 6163{ 6164 char *packed = NULL; 6165 size_t bufsize; 6166 size_t nvsize = 0; 6167 dmu_buf_t *db; 6168 6169 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 6170 6171 /* 6172 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 6173 * information. This avoids the dmu_buf_will_dirty() path and 6174 * saves us a pre-read to get data we don't actually care about. 6175 */ 6176 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 6177 packed = kmem_alloc(bufsize, KM_SLEEP); 6178 6179 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 6180 KM_SLEEP) == 0); 6181 bzero(packed + nvsize, bufsize - nvsize); 6182 6183 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 6184 6185 kmem_free(packed, bufsize); 6186 6187 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 6188 dmu_buf_will_dirty(db, tx); 6189 *(uint64_t *)db->db_data = nvsize; 6190 dmu_buf_rele(db, FTAG); 6191} 6192 6193static void 6194spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 6195 const char *config, const char *entry) 6196{ 6197 nvlist_t *nvroot; 6198 nvlist_t **list; 6199 int i; 6200 6201 if (!sav->sav_sync) 6202 return; 6203 6204 /* 6205 * Update the MOS nvlist describing the list of available devices. 6206 * spa_validate_aux() will have already made sure this nvlist is 6207 * valid and the vdevs are labeled appropriately. 6208 */ 6209 if (sav->sav_object == 0) { 6210 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 6211 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 6212 sizeof (uint64_t), tx); 6213 VERIFY(zap_update(spa->spa_meta_objset, 6214 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 6215 &sav->sav_object, tx) == 0); 6216 } 6217 6218 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 6219 if (sav->sav_count == 0) { 6220 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 6221 } else { 6222 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 6223 for (i = 0; i < sav->sav_count; i++) 6224 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 6225 B_FALSE, VDEV_CONFIG_L2CACHE); 6226 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 6227 sav->sav_count) == 0); 6228 for (i = 0; i < sav->sav_count; i++) 6229 nvlist_free(list[i]); 6230 kmem_free(list, sav->sav_count * sizeof (void *)); 6231 } 6232 6233 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 6234 nvlist_free(nvroot); 6235 6236 sav->sav_sync = B_FALSE; 6237} 6238 6239static void 6240spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 6241{ 6242 nvlist_t *config; 6243 6244 if (list_is_empty(&spa->spa_config_dirty_list)) 6245 return; 6246 6247 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6248 6249 config = spa_config_generate(spa, spa->spa_root_vdev, 6250 dmu_tx_get_txg(tx), B_FALSE); 6251 6252 /* 6253 * If we're upgrading the spa version then make sure that 6254 * the config object gets updated with the correct version. 6255 */ 6256 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) 6257 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 6258 spa->spa_uberblock.ub_version); 6259 6260 spa_config_exit(spa, SCL_STATE, FTAG); 6261 6262 if (spa->spa_config_syncing) 6263 nvlist_free(spa->spa_config_syncing); 6264 spa->spa_config_syncing = config; 6265 6266 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 6267} 6268 6269static void 6270spa_sync_version(void *arg, dmu_tx_t *tx) 6271{ 6272 uint64_t *versionp = arg; 6273 uint64_t version = *versionp; 6274 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6275 6276 /* 6277 * Setting the version is special cased when first creating the pool. 6278 */ 6279 ASSERT(tx->tx_txg != TXG_INITIAL); 6280 6281 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 6282 ASSERT(version >= spa_version(spa)); 6283 6284 spa->spa_uberblock.ub_version = version; 6285 vdev_config_dirty(spa->spa_root_vdev); 6286 spa_history_log_internal(spa, "set", tx, "version=%lld", version); 6287} 6288 6289/* 6290 * Set zpool properties. 6291 */ 6292static void 6293spa_sync_props(void *arg, dmu_tx_t *tx) 6294{ 6295 nvlist_t *nvp = arg; 6296 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6297 objset_t *mos = spa->spa_meta_objset; 6298 nvpair_t *elem = NULL; 6299 6300 mutex_enter(&spa->spa_props_lock); 6301 6302 while ((elem = nvlist_next_nvpair(nvp, elem))) { 6303 uint64_t intval; 6304 char *strval, *fname; 6305 zpool_prop_t prop; 6306 const char *propname; 6307 zprop_type_t proptype; 6308 spa_feature_t fid; 6309 6310 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 6311 case ZPROP_INVAL: 6312 /* 6313 * We checked this earlier in spa_prop_validate(). 6314 */ 6315 ASSERT(zpool_prop_feature(nvpair_name(elem))); 6316 6317 fname = strchr(nvpair_name(elem), '@') + 1; 6318 VERIFY0(zfeature_lookup_name(fname, &fid)); 6319 6320 spa_feature_enable(spa, fid, tx); 6321 spa_history_log_internal(spa, "set", tx, 6322 "%s=enabled", nvpair_name(elem)); 6323 break; 6324 6325 case ZPOOL_PROP_VERSION: 6326 intval = fnvpair_value_uint64(elem); 6327 /* 6328 * The version is synced seperatly before other 6329 * properties and should be correct by now. 6330 */ 6331 ASSERT3U(spa_version(spa), >=, intval); 6332 break; 6333 6334 case ZPOOL_PROP_ALTROOT: 6335 /* 6336 * 'altroot' is a non-persistent property. It should 6337 * have been set temporarily at creation or import time. 6338 */ 6339 ASSERT(spa->spa_root != NULL); 6340 break; 6341 6342 case ZPOOL_PROP_READONLY: 6343 case ZPOOL_PROP_CACHEFILE: 6344 /* 6345 * 'readonly' and 'cachefile' are also non-persisitent 6346 * properties. 6347 */ 6348 break; 6349 case ZPOOL_PROP_COMMENT: 6350 strval = fnvpair_value_string(elem); 6351 if (spa->spa_comment != NULL) 6352 spa_strfree(spa->spa_comment); 6353 spa->spa_comment = spa_strdup(strval); 6354 /* 6355 * We need to dirty the configuration on all the vdevs 6356 * so that their labels get updated. It's unnecessary 6357 * to do this for pool creation since the vdev's 6358 * configuratoin has already been dirtied. 6359 */ 6360 if (tx->tx_txg != TXG_INITIAL) 6361 vdev_config_dirty(spa->spa_root_vdev); 6362 spa_history_log_internal(spa, "set", tx, 6363 "%s=%s", nvpair_name(elem), strval); 6364 break; 6365 default: 6366 /* 6367 * Set pool property values in the poolprops mos object. 6368 */ 6369 if (spa->spa_pool_props_object == 0) { 6370 spa->spa_pool_props_object = 6371 zap_create_link(mos, DMU_OT_POOL_PROPS, 6372 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 6373 tx); 6374 } 6375 6376 /* normalize the property name */ 6377 propname = zpool_prop_to_name(prop); 6378 proptype = zpool_prop_get_type(prop); 6379 6380 if (nvpair_type(elem) == DATA_TYPE_STRING) { 6381 ASSERT(proptype == PROP_TYPE_STRING); 6382 strval = fnvpair_value_string(elem); 6383 VERIFY0(zap_update(mos, 6384 spa->spa_pool_props_object, propname, 6385 1, strlen(strval) + 1, strval, tx)); 6386 spa_history_log_internal(spa, "set", tx, 6387 "%s=%s", nvpair_name(elem), strval); 6388 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 6389 intval = fnvpair_value_uint64(elem); 6390 6391 if (proptype == PROP_TYPE_INDEX) { 6392 const char *unused; 6393 VERIFY0(zpool_prop_index_to_string( 6394 prop, intval, &unused)); 6395 } 6396 VERIFY0(zap_update(mos, 6397 spa->spa_pool_props_object, propname, 6398 8, 1, &intval, tx)); 6399 spa_history_log_internal(spa, "set", tx, 6400 "%s=%lld", nvpair_name(elem), intval); 6401 } else { 6402 ASSERT(0); /* not allowed */ 6403 } 6404 6405 switch (prop) { 6406 case ZPOOL_PROP_DELEGATION: 6407 spa->spa_delegation = intval; 6408 break; 6409 case ZPOOL_PROP_BOOTFS: 6410 spa->spa_bootfs = intval; 6411 break; 6412 case ZPOOL_PROP_FAILUREMODE: 6413 spa->spa_failmode = intval; 6414 break; 6415 case ZPOOL_PROP_AUTOEXPAND: 6416 spa->spa_autoexpand = intval; 6417 if (tx->tx_txg != TXG_INITIAL) 6418 spa_async_request(spa, 6419 SPA_ASYNC_AUTOEXPAND); 6420 break; 6421 case ZPOOL_PROP_DEDUPDITTO: 6422 spa->spa_dedup_ditto = intval; 6423 break; 6424 default: 6425 break; 6426 } 6427 } 6428 6429 } 6430 6431 mutex_exit(&spa->spa_props_lock); 6432} 6433 6434/* 6435 * Perform one-time upgrade on-disk changes. spa_version() does not 6436 * reflect the new version this txg, so there must be no changes this 6437 * txg to anything that the upgrade code depends on after it executes. 6438 * Therefore this must be called after dsl_pool_sync() does the sync 6439 * tasks. 6440 */ 6441static void 6442spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 6443{ 6444 dsl_pool_t *dp = spa->spa_dsl_pool; 6445 6446 ASSERT(spa->spa_sync_pass == 1); 6447 6448 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); 6449 6450 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 6451 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 6452 dsl_pool_create_origin(dp, tx); 6453 6454 /* Keeping the origin open increases spa_minref */ 6455 spa->spa_minref += 3; 6456 } 6457 6458 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 6459 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 6460 dsl_pool_upgrade_clones(dp, tx); 6461 } 6462 6463 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 6464 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 6465 dsl_pool_upgrade_dir_clones(dp, tx); 6466 6467 /* Keeping the freedir open increases spa_minref */ 6468 spa->spa_minref += 3; 6469 } 6470 6471 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 6472 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6473 spa_feature_create_zap_objects(spa, tx); 6474 } 6475 6476 /* 6477 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable 6478 * when possibility to use lz4 compression for metadata was added 6479 * Old pools that have this feature enabled must be upgraded to have 6480 * this feature active 6481 */ 6482 if (spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6483 boolean_t lz4_en = spa_feature_is_enabled(spa, 6484 SPA_FEATURE_LZ4_COMPRESS); 6485 boolean_t lz4_ac = spa_feature_is_active(spa, 6486 SPA_FEATURE_LZ4_COMPRESS); 6487 6488 if (lz4_en && !lz4_ac) 6489 spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx); 6490 } 6491 rrw_exit(&dp->dp_config_rwlock, FTAG); 6492} 6493 6494/* 6495 * Sync the specified transaction group. New blocks may be dirtied as 6496 * part of the process, so we iterate until it converges. 6497 */ 6498void 6499spa_sync(spa_t *spa, uint64_t txg) 6500{ 6501 dsl_pool_t *dp = spa->spa_dsl_pool; 6502 objset_t *mos = spa->spa_meta_objset; 6503 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 6504 vdev_t *rvd = spa->spa_root_vdev; 6505 vdev_t *vd; 6506 dmu_tx_t *tx; 6507 int error; 6508 6509 VERIFY(spa_writeable(spa)); 6510 6511 /* 6512 * Lock out configuration changes. 6513 */ 6514 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 6515 6516 spa->spa_syncing_txg = txg; 6517 spa->spa_sync_pass = 0; 6518 6519 /* 6520 * If there are any pending vdev state changes, convert them 6521 * into config changes that go out with this transaction group. 6522 */ 6523 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6524 while (list_head(&spa->spa_state_dirty_list) != NULL) { 6525 /* 6526 * We need the write lock here because, for aux vdevs, 6527 * calling vdev_config_dirty() modifies sav_config. 6528 * This is ugly and will become unnecessary when we 6529 * eliminate the aux vdev wart by integrating all vdevs 6530 * into the root vdev tree. 6531 */ 6532 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6533 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 6534 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 6535 vdev_state_clean(vd); 6536 vdev_config_dirty(vd); 6537 } 6538 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6539 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6540 } 6541 spa_config_exit(spa, SCL_STATE, FTAG); 6542 6543 tx = dmu_tx_create_assigned(dp, txg); 6544 6545 spa->spa_sync_starttime = gethrtime(); 6546#ifdef illumos 6547 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, 6548 spa->spa_sync_starttime + spa->spa_deadman_synctime)); 6549#else /* FreeBSD */ 6550#ifdef _KERNEL 6551 callout_reset(&spa->spa_deadman_cycid, 6552 hz * spa->spa_deadman_synctime / NANOSEC, spa_deadman, spa); 6553#endif 6554#endif 6555 6556 /* 6557 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 6558 * set spa_deflate if we have no raid-z vdevs. 6559 */ 6560 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 6561 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 6562 int i; 6563 6564 for (i = 0; i < rvd->vdev_children; i++) { 6565 vd = rvd->vdev_child[i]; 6566 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 6567 break; 6568 } 6569 if (i == rvd->vdev_children) { 6570 spa->spa_deflate = TRUE; 6571 VERIFY(0 == zap_add(spa->spa_meta_objset, 6572 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 6573 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 6574 } 6575 } 6576 6577 /* 6578 * If anything has changed in this txg, or if someone is waiting 6579 * for this txg to sync (eg, spa_vdev_remove()), push the 6580 * deferred frees from the previous txg. If not, leave them 6581 * alone so that we don't generate work on an otherwise idle 6582 * system. 6583 */ 6584 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || 6585 !txg_list_empty(&dp->dp_dirty_dirs, txg) || 6586 !txg_list_empty(&dp->dp_sync_tasks, txg) || 6587 ((dsl_scan_active(dp->dp_scan) || 6588 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) { 6589 spa_sync_deferred_frees(spa, tx); 6590 } 6591 6592 /* 6593 * Iterate to convergence. 6594 */ 6595 do { 6596 int pass = ++spa->spa_sync_pass; 6597 6598 spa_sync_config_object(spa, tx); 6599 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 6600 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 6601 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 6602 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 6603 spa_errlog_sync(spa, txg); 6604 dsl_pool_sync(dp, txg); 6605 6606 if (pass < zfs_sync_pass_deferred_free) { 6607 spa_sync_frees(spa, free_bpl, tx); 6608 } else { 6609 bplist_iterate(free_bpl, bpobj_enqueue_cb, 6610 &spa->spa_deferred_bpobj, tx); 6611 } 6612 6613 ddt_sync(spa, txg); 6614 dsl_scan_sync(dp, tx); 6615 6616 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 6617 vdev_sync(vd, txg); 6618 6619 if (pass == 1) 6620 spa_sync_upgrades(spa, tx); 6621 6622 } while (dmu_objset_is_dirty(mos, txg)); 6623 6624 /* 6625 * Rewrite the vdev configuration (which includes the uberblock) 6626 * to commit the transaction group. 6627 * 6628 * If there are no dirty vdevs, we sync the uberblock to a few 6629 * random top-level vdevs that are known to be visible in the 6630 * config cache (see spa_vdev_add() for a complete description). 6631 * If there *are* dirty vdevs, sync the uberblock to all vdevs. 6632 */ 6633 for (;;) { 6634 /* 6635 * We hold SCL_STATE to prevent vdev open/close/etc. 6636 * while we're attempting to write the vdev labels. 6637 */ 6638 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6639 6640 if (list_is_empty(&spa->spa_config_dirty_list)) { 6641 vdev_t *svd[SPA_DVAS_PER_BP]; 6642 int svdcount = 0; 6643 int children = rvd->vdev_children; 6644 int c0 = spa_get_random(children); 6645 6646 for (int c = 0; c < children; c++) { 6647 vd = rvd->vdev_child[(c0 + c) % children]; 6648 if (vd->vdev_ms_array == 0 || vd->vdev_islog) 6649 continue; 6650 svd[svdcount++] = vd; 6651 if (svdcount == SPA_DVAS_PER_BP) 6652 break; 6653 } 6654 error = vdev_config_sync(svd, svdcount, txg, B_FALSE); 6655 if (error != 0) 6656 error = vdev_config_sync(svd, svdcount, txg, 6657 B_TRUE); 6658 } else { 6659 error = vdev_config_sync(rvd->vdev_child, 6660 rvd->vdev_children, txg, B_FALSE); 6661 if (error != 0) 6662 error = vdev_config_sync(rvd->vdev_child, 6663 rvd->vdev_children, txg, B_TRUE); 6664 } 6665 6666 if (error == 0) 6667 spa->spa_last_synced_guid = rvd->vdev_guid; 6668 6669 spa_config_exit(spa, SCL_STATE, FTAG); 6670 6671 if (error == 0) 6672 break; 6673 zio_suspend(spa, NULL); 6674 zio_resume_wait(spa); 6675 } 6676 dmu_tx_commit(tx); 6677 6678#ifdef illumos 6679 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 6680#else /* FreeBSD */ 6681#ifdef _KERNEL 6682 callout_drain(&spa->spa_deadman_cycid); 6683#endif 6684#endif 6685 6686 /* 6687 * Clear the dirty config list. 6688 */ 6689 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 6690 vdev_config_clean(vd); 6691 6692 /* 6693 * Now that the new config has synced transactionally, 6694 * let it become visible to the config cache. 6695 */ 6696 if (spa->spa_config_syncing != NULL) { 6697 spa_config_set(spa, spa->spa_config_syncing); 6698 spa->spa_config_txg = txg; 6699 spa->spa_config_syncing = NULL; 6700 } 6701 6702 spa->spa_ubsync = spa->spa_uberblock; 6703 6704 dsl_pool_sync_done(dp, txg); 6705 6706 /* 6707 * Update usable space statistics. 6708 */ 6709 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 6710 vdev_sync_done(vd, txg); 6711 6712 spa_update_dspace(spa); 6713 6714 /* 6715 * It had better be the case that we didn't dirty anything 6716 * since vdev_config_sync(). 6717 */ 6718 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 6719 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 6720 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 6721 6722 spa->spa_sync_pass = 0; 6723 6724 spa_config_exit(spa, SCL_CONFIG, FTAG); 6725 6726 spa_handle_ignored_writes(spa); 6727 6728 /* 6729 * If any async tasks have been requested, kick them off. 6730 */ 6731 spa_async_dispatch(spa); 6732 spa_async_dispatch_vd(spa); 6733} 6734 6735/* 6736 * Sync all pools. We don't want to hold the namespace lock across these 6737 * operations, so we take a reference on the spa_t and drop the lock during the 6738 * sync. 6739 */ 6740void 6741spa_sync_allpools(void) 6742{ 6743 spa_t *spa = NULL; 6744 mutex_enter(&spa_namespace_lock); 6745 while ((spa = spa_next(spa)) != NULL) { 6746 if (spa_state(spa) != POOL_STATE_ACTIVE || 6747 !spa_writeable(spa) || spa_suspended(spa)) 6748 continue; 6749 spa_open_ref(spa, FTAG); 6750 mutex_exit(&spa_namespace_lock); 6751 txg_wait_synced(spa_get_dsl(spa), 0); 6752 mutex_enter(&spa_namespace_lock); 6753 spa_close(spa, FTAG); 6754 } 6755 mutex_exit(&spa_namespace_lock); 6756} 6757 6758/* 6759 * ========================================================================== 6760 * Miscellaneous routines 6761 * ========================================================================== 6762 */ 6763 6764/* 6765 * Remove all pools in the system. 6766 */ 6767void 6768spa_evict_all(void) 6769{ 6770 spa_t *spa; 6771 6772 /* 6773 * Remove all cached state. All pools should be closed now, 6774 * so every spa in the AVL tree should be unreferenced. 6775 */ 6776 mutex_enter(&spa_namespace_lock); 6777 while ((spa = spa_next(NULL)) != NULL) { 6778 /* 6779 * Stop async tasks. The async thread may need to detach 6780 * a device that's been replaced, which requires grabbing 6781 * spa_namespace_lock, so we must drop it here. 6782 */ 6783 spa_open_ref(spa, FTAG); 6784 mutex_exit(&spa_namespace_lock); 6785 spa_async_suspend(spa); 6786 mutex_enter(&spa_namespace_lock); 6787 spa_close(spa, FTAG); 6788 6789 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 6790 spa_unload(spa); 6791 spa_deactivate(spa); 6792 } 6793 spa_remove(spa); 6794 } 6795 mutex_exit(&spa_namespace_lock); 6796} 6797 6798vdev_t * 6799spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 6800{ 6801 vdev_t *vd; 6802 int i; 6803 6804 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 6805 return (vd); 6806 6807 if (aux) { 6808 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 6809 vd = spa->spa_l2cache.sav_vdevs[i]; 6810 if (vd->vdev_guid == guid) 6811 return (vd); 6812 } 6813 6814 for (i = 0; i < spa->spa_spares.sav_count; i++) { 6815 vd = spa->spa_spares.sav_vdevs[i]; 6816 if (vd->vdev_guid == guid) 6817 return (vd); 6818 } 6819 } 6820 6821 return (NULL); 6822} 6823 6824void 6825spa_upgrade(spa_t *spa, uint64_t version) 6826{ 6827 ASSERT(spa_writeable(spa)); 6828 6829 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 6830 6831 /* 6832 * This should only be called for a non-faulted pool, and since a 6833 * future version would result in an unopenable pool, this shouldn't be 6834 * possible. 6835 */ 6836 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); 6837 ASSERT3U(version, >=, spa->spa_uberblock.ub_version); 6838 6839 spa->spa_uberblock.ub_version = version; 6840 vdev_config_dirty(spa->spa_root_vdev); 6841 6842 spa_config_exit(spa, SCL_ALL, FTAG); 6843 6844 txg_wait_synced(spa_get_dsl(spa), 0); 6845} 6846 6847boolean_t 6848spa_has_spare(spa_t *spa, uint64_t guid) 6849{ 6850 int i; 6851 uint64_t spareguid; 6852 spa_aux_vdev_t *sav = &spa->spa_spares; 6853 6854 for (i = 0; i < sav->sav_count; i++) 6855 if (sav->sav_vdevs[i]->vdev_guid == guid) 6856 return (B_TRUE); 6857 6858 for (i = 0; i < sav->sav_npending; i++) { 6859 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 6860 &spareguid) == 0 && spareguid == guid) 6861 return (B_TRUE); 6862 } 6863 6864 return (B_FALSE); 6865} 6866 6867/* 6868 * Check if a pool has an active shared spare device. 6869 * Note: reference count of an active spare is 2, as a spare and as a replace 6870 */ 6871static boolean_t 6872spa_has_active_shared_spare(spa_t *spa) 6873{ 6874 int i, refcnt; 6875 uint64_t pool; 6876 spa_aux_vdev_t *sav = &spa->spa_spares; 6877 6878 for (i = 0; i < sav->sav_count; i++) { 6879 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 6880 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 6881 refcnt > 2) 6882 return (B_TRUE); 6883 } 6884 6885 return (B_FALSE); 6886} 6887 6888/* 6889 * Post a sysevent corresponding to the given event. The 'name' must be one of 6890 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 6891 * filled in from the spa and (optionally) the vdev. This doesn't do anything 6892 * in the userland libzpool, as we don't want consumers to misinterpret ztest 6893 * or zdb as real changes. 6894 */ 6895void 6896spa_event_notify(spa_t *spa, vdev_t *vd, const char *name) 6897{ 6898#ifdef _KERNEL 6899 sysevent_t *ev; 6900 sysevent_attr_list_t *attr = NULL; 6901 sysevent_value_t value; 6902 sysevent_id_t eid; 6903 6904 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 6905 SE_SLEEP); 6906 6907 value.value_type = SE_DATA_TYPE_STRING; 6908 value.value.sv_string = spa_name(spa); 6909 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 6910 goto done; 6911 6912 value.value_type = SE_DATA_TYPE_UINT64; 6913 value.value.sv_uint64 = spa_guid(spa); 6914 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 6915 goto done; 6916 6917 if (vd) { 6918 value.value_type = SE_DATA_TYPE_UINT64; 6919 value.value.sv_uint64 = vd->vdev_guid; 6920 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 6921 SE_SLEEP) != 0) 6922 goto done; 6923 6924 if (vd->vdev_path) { 6925 value.value_type = SE_DATA_TYPE_STRING; 6926 value.value.sv_string = vd->vdev_path; 6927 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 6928 &value, SE_SLEEP) != 0) 6929 goto done; 6930 } 6931 } 6932 6933 if (sysevent_attach_attributes(ev, attr) != 0) 6934 goto done; 6935 attr = NULL; 6936 6937 (void) log_sysevent(ev, SE_SLEEP, &eid); 6938 6939done: 6940 if (attr) 6941 sysevent_free_attr(attr); 6942 sysevent_free(ev); 6943#endif 6944} 6945