spa.c revision 271785
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2011, 2014 by Delphix. All rights reserved. 25 * Copyright (c) 2013, 2014, Nexenta Systems, Inc. All rights reserved. 26 * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 27 */ 28 29/* 30 * SPA: Storage Pool Allocator 31 * 32 * This file contains all the routines used when modifying on-disk SPA state. 33 * This includes opening, importing, destroying, exporting a pool, and syncing a 34 * pool. 35 */ 36 37#include <sys/zfs_context.h> 38#include <sys/fm/fs/zfs.h> 39#include <sys/spa_impl.h> 40#include <sys/zio.h> 41#include <sys/zio_checksum.h> 42#include <sys/dmu.h> 43#include <sys/dmu_tx.h> 44#include <sys/zap.h> 45#include <sys/zil.h> 46#include <sys/ddt.h> 47#include <sys/vdev_impl.h> 48#include <sys/metaslab.h> 49#include <sys/metaslab_impl.h> 50#include <sys/uberblock_impl.h> 51#include <sys/txg.h> 52#include <sys/avl.h> 53#include <sys/dmu_traverse.h> 54#include <sys/dmu_objset.h> 55#include <sys/unique.h> 56#include <sys/dsl_pool.h> 57#include <sys/dsl_dataset.h> 58#include <sys/dsl_dir.h> 59#include <sys/dsl_prop.h> 60#include <sys/dsl_synctask.h> 61#include <sys/fs/zfs.h> 62#include <sys/arc.h> 63#include <sys/callb.h> 64#include <sys/spa_boot.h> 65#include <sys/zfs_ioctl.h> 66#include <sys/dsl_scan.h> 67#include <sys/dmu_send.h> 68#include <sys/dsl_destroy.h> 69#include <sys/dsl_userhold.h> 70#include <sys/zfeature.h> 71#include <sys/zvol.h> 72#include <sys/trim_map.h> 73 74#ifdef _KERNEL 75#include <sys/callb.h> 76#include <sys/cpupart.h> 77#include <sys/zone.h> 78#endif /* _KERNEL */ 79 80#include "zfs_prop.h" 81#include "zfs_comutil.h" 82 83/* Check hostid on import? */ 84static int check_hostid = 1; 85 86/* 87 * The interval, in seconds, at which failed configuration cache file writes 88 * should be retried. 89 */ 90static int zfs_ccw_retry_interval = 300; 91 92SYSCTL_DECL(_vfs_zfs); 93SYSCTL_INT(_vfs_zfs, OID_AUTO, check_hostid, CTLFLAG_RWTUN, &check_hostid, 0, 94 "Check hostid on import?"); 95TUNABLE_INT("vfs.zfs.ccw_retry_interval", &zfs_ccw_retry_interval); 96SYSCTL_INT(_vfs_zfs, OID_AUTO, ccw_retry_interval, CTLFLAG_RW, 97 &zfs_ccw_retry_interval, 0, 98 "Configuration cache file write, retry after failure, interval (seconds)"); 99 100typedef enum zti_modes { 101 ZTI_MODE_FIXED, /* value is # of threads (min 1) */ 102 ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */ 103 ZTI_MODE_NULL, /* don't create a taskq */ 104 ZTI_NMODES 105} zti_modes_t; 106 107#define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) } 108#define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 } 109#define ZTI_NULL { ZTI_MODE_NULL, 0, 0 } 110 111#define ZTI_N(n) ZTI_P(n, 1) 112#define ZTI_ONE ZTI_N(1) 113 114typedef struct zio_taskq_info { 115 zti_modes_t zti_mode; 116 uint_t zti_value; 117 uint_t zti_count; 118} zio_taskq_info_t; 119 120static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { 121 "issue", "issue_high", "intr", "intr_high" 122}; 123 124/* 125 * This table defines the taskq settings for each ZFS I/O type. When 126 * initializing a pool, we use this table to create an appropriately sized 127 * taskq. Some operations are low volume and therefore have a small, static 128 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE 129 * macros. Other operations process a large amount of data; the ZTI_BATCH 130 * macro causes us to create a taskq oriented for throughput. Some operations 131 * are so high frequency and short-lived that the taskq itself can become a a 132 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an 133 * additional degree of parallelism specified by the number of threads per- 134 * taskq and the number of taskqs; when dispatching an event in this case, the 135 * particular taskq is chosen at random. 136 * 137 * The different taskq priorities are to handle the different contexts (issue 138 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that 139 * need to be handled with minimum delay. 140 */ 141const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = { 142 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */ 143 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */ 144 { ZTI_N(8), ZTI_NULL, ZTI_P(12, 8), ZTI_NULL }, /* READ */ 145 { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */ 146 { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */ 147 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */ 148 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */ 149}; 150 151static void spa_sync_version(void *arg, dmu_tx_t *tx); 152static void spa_sync_props(void *arg, dmu_tx_t *tx); 153static boolean_t spa_has_active_shared_spare(spa_t *spa); 154static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config, 155 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 156 char **ereport); 157static void spa_vdev_resilver_done(spa_t *spa); 158 159uint_t zio_taskq_batch_pct = 75; /* 1 thread per cpu in pset */ 160#ifdef PSRSET_BIND 161id_t zio_taskq_psrset_bind = PS_NONE; 162#endif 163#ifdef SYSDC 164boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ 165#endif 166uint_t zio_taskq_basedc = 80; /* base duty cycle */ 167 168boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ 169extern int zfs_sync_pass_deferred_free; 170 171#ifndef illumos 172extern void spa_deadman(void *arg); 173#endif 174 175/* 176 * This (illegal) pool name is used when temporarily importing a spa_t in order 177 * to get the vdev stats associated with the imported devices. 178 */ 179#define TRYIMPORT_NAME "$import" 180 181/* 182 * ========================================================================== 183 * SPA properties routines 184 * ========================================================================== 185 */ 186 187/* 188 * Add a (source=src, propname=propval) list to an nvlist. 189 */ 190static void 191spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, 192 uint64_t intval, zprop_source_t src) 193{ 194 const char *propname = zpool_prop_to_name(prop); 195 nvlist_t *propval; 196 197 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); 198 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); 199 200 if (strval != NULL) 201 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); 202 else 203 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); 204 205 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); 206 nvlist_free(propval); 207} 208 209/* 210 * Get property values from the spa configuration. 211 */ 212static void 213spa_prop_get_config(spa_t *spa, nvlist_t **nvp) 214{ 215 vdev_t *rvd = spa->spa_root_vdev; 216 dsl_pool_t *pool = spa->spa_dsl_pool; 217 uint64_t size, alloc, cap, version; 218 zprop_source_t src = ZPROP_SRC_NONE; 219 spa_config_dirent_t *dp; 220 metaslab_class_t *mc = spa_normal_class(spa); 221 222 ASSERT(MUTEX_HELD(&spa->spa_props_lock)); 223 224 if (rvd != NULL) { 225 alloc = metaslab_class_get_alloc(spa_normal_class(spa)); 226 size = metaslab_class_get_space(spa_normal_class(spa)); 227 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); 228 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); 229 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); 230 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, 231 size - alloc, src); 232 233 spa_prop_add_list(*nvp, ZPOOL_PROP_FRAGMENTATION, NULL, 234 metaslab_class_fragmentation(mc), src); 235 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, 236 metaslab_class_expandable_space(mc), src); 237 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, 238 (spa_mode(spa) == FREAD), src); 239 240 cap = (size == 0) ? 0 : (alloc * 100 / size); 241 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); 242 243 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, 244 ddt_get_pool_dedup_ratio(spa), src); 245 246 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, 247 rvd->vdev_state, src); 248 249 version = spa_version(spa); 250 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) 251 src = ZPROP_SRC_DEFAULT; 252 else 253 src = ZPROP_SRC_LOCAL; 254 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src); 255 } 256 257 if (pool != NULL) { 258 /* 259 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, 260 * when opening pools before this version freedir will be NULL. 261 */ 262 if (pool->dp_free_dir != NULL) { 263 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, 264 pool->dp_free_dir->dd_phys->dd_used_bytes, src); 265 } else { 266 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, 267 NULL, 0, src); 268 } 269 270 if (pool->dp_leak_dir != NULL) { 271 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL, 272 pool->dp_leak_dir->dd_phys->dd_used_bytes, src); 273 } else { 274 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, 275 NULL, 0, src); 276 } 277 } 278 279 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); 280 281 if (spa->spa_comment != NULL) { 282 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, 283 0, ZPROP_SRC_LOCAL); 284 } 285 286 if (spa->spa_root != NULL) 287 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, 288 0, ZPROP_SRC_LOCAL); 289 290 if ((dp = list_head(&spa->spa_config_list)) != NULL) { 291 if (dp->scd_path == NULL) { 292 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 293 "none", 0, ZPROP_SRC_LOCAL); 294 } else if (strcmp(dp->scd_path, spa_config_path) != 0) { 295 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 296 dp->scd_path, 0, ZPROP_SRC_LOCAL); 297 } 298 } 299} 300 301/* 302 * Get zpool property values. 303 */ 304int 305spa_prop_get(spa_t *spa, nvlist_t **nvp) 306{ 307 objset_t *mos = spa->spa_meta_objset; 308 zap_cursor_t zc; 309 zap_attribute_t za; 310 int err; 311 312 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 313 314 mutex_enter(&spa->spa_props_lock); 315 316 /* 317 * Get properties from the spa config. 318 */ 319 spa_prop_get_config(spa, nvp); 320 321 /* If no pool property object, no more prop to get. */ 322 if (mos == NULL || spa->spa_pool_props_object == 0) { 323 mutex_exit(&spa->spa_props_lock); 324 return (0); 325 } 326 327 /* 328 * Get properties from the MOS pool property object. 329 */ 330 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); 331 (err = zap_cursor_retrieve(&zc, &za)) == 0; 332 zap_cursor_advance(&zc)) { 333 uint64_t intval = 0; 334 char *strval = NULL; 335 zprop_source_t src = ZPROP_SRC_DEFAULT; 336 zpool_prop_t prop; 337 338 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL) 339 continue; 340 341 switch (za.za_integer_length) { 342 case 8: 343 /* integer property */ 344 if (za.za_first_integer != 345 zpool_prop_default_numeric(prop)) 346 src = ZPROP_SRC_LOCAL; 347 348 if (prop == ZPOOL_PROP_BOOTFS) { 349 dsl_pool_t *dp; 350 dsl_dataset_t *ds = NULL; 351 352 dp = spa_get_dsl(spa); 353 dsl_pool_config_enter(dp, FTAG); 354 if (err = dsl_dataset_hold_obj(dp, 355 za.za_first_integer, FTAG, &ds)) { 356 dsl_pool_config_exit(dp, FTAG); 357 break; 358 } 359 360 strval = kmem_alloc( 361 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, 362 KM_SLEEP); 363 dsl_dataset_name(ds, strval); 364 dsl_dataset_rele(ds, FTAG); 365 dsl_pool_config_exit(dp, FTAG); 366 } else { 367 strval = NULL; 368 intval = za.za_first_integer; 369 } 370 371 spa_prop_add_list(*nvp, prop, strval, intval, src); 372 373 if (strval != NULL) 374 kmem_free(strval, 375 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); 376 377 break; 378 379 case 1: 380 /* string property */ 381 strval = kmem_alloc(za.za_num_integers, KM_SLEEP); 382 err = zap_lookup(mos, spa->spa_pool_props_object, 383 za.za_name, 1, za.za_num_integers, strval); 384 if (err) { 385 kmem_free(strval, za.za_num_integers); 386 break; 387 } 388 spa_prop_add_list(*nvp, prop, strval, 0, src); 389 kmem_free(strval, za.za_num_integers); 390 break; 391 392 default: 393 break; 394 } 395 } 396 zap_cursor_fini(&zc); 397 mutex_exit(&spa->spa_props_lock); 398out: 399 if (err && err != ENOENT) { 400 nvlist_free(*nvp); 401 *nvp = NULL; 402 return (err); 403 } 404 405 return (0); 406} 407 408/* 409 * Validate the given pool properties nvlist and modify the list 410 * for the property values to be set. 411 */ 412static int 413spa_prop_validate(spa_t *spa, nvlist_t *props) 414{ 415 nvpair_t *elem; 416 int error = 0, reset_bootfs = 0; 417 uint64_t objnum = 0; 418 boolean_t has_feature = B_FALSE; 419 420 elem = NULL; 421 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 422 uint64_t intval; 423 char *strval, *slash, *check, *fname; 424 const char *propname = nvpair_name(elem); 425 zpool_prop_t prop = zpool_name_to_prop(propname); 426 427 switch (prop) { 428 case ZPROP_INVAL: 429 if (!zpool_prop_feature(propname)) { 430 error = SET_ERROR(EINVAL); 431 break; 432 } 433 434 /* 435 * Sanitize the input. 436 */ 437 if (nvpair_type(elem) != DATA_TYPE_UINT64) { 438 error = SET_ERROR(EINVAL); 439 break; 440 } 441 442 if (nvpair_value_uint64(elem, &intval) != 0) { 443 error = SET_ERROR(EINVAL); 444 break; 445 } 446 447 if (intval != 0) { 448 error = SET_ERROR(EINVAL); 449 break; 450 } 451 452 fname = strchr(propname, '@') + 1; 453 if (zfeature_lookup_name(fname, NULL) != 0) { 454 error = SET_ERROR(EINVAL); 455 break; 456 } 457 458 has_feature = B_TRUE; 459 break; 460 461 case ZPOOL_PROP_VERSION: 462 error = nvpair_value_uint64(elem, &intval); 463 if (!error && 464 (intval < spa_version(spa) || 465 intval > SPA_VERSION_BEFORE_FEATURES || 466 has_feature)) 467 error = SET_ERROR(EINVAL); 468 break; 469 470 case ZPOOL_PROP_DELEGATION: 471 case ZPOOL_PROP_AUTOREPLACE: 472 case ZPOOL_PROP_LISTSNAPS: 473 case ZPOOL_PROP_AUTOEXPAND: 474 error = nvpair_value_uint64(elem, &intval); 475 if (!error && intval > 1) 476 error = SET_ERROR(EINVAL); 477 break; 478 479 case ZPOOL_PROP_BOOTFS: 480 /* 481 * If the pool version is less than SPA_VERSION_BOOTFS, 482 * or the pool is still being created (version == 0), 483 * the bootfs property cannot be set. 484 */ 485 if (spa_version(spa) < SPA_VERSION_BOOTFS) { 486 error = SET_ERROR(ENOTSUP); 487 break; 488 } 489 490 /* 491 * Make sure the vdev config is bootable 492 */ 493 if (!vdev_is_bootable(spa->spa_root_vdev)) { 494 error = SET_ERROR(ENOTSUP); 495 break; 496 } 497 498 reset_bootfs = 1; 499 500 error = nvpair_value_string(elem, &strval); 501 502 if (!error) { 503 objset_t *os; 504 uint64_t compress; 505 506 if (strval == NULL || strval[0] == '\0') { 507 objnum = zpool_prop_default_numeric( 508 ZPOOL_PROP_BOOTFS); 509 break; 510 } 511 512 if (error = dmu_objset_hold(strval, FTAG, &os)) 513 break; 514 515 /* Must be ZPL and not gzip compressed. */ 516 517 if (dmu_objset_type(os) != DMU_OST_ZFS) { 518 error = SET_ERROR(ENOTSUP); 519 } else if ((error = 520 dsl_prop_get_int_ds(dmu_objset_ds(os), 521 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 522 &compress)) == 0 && 523 !BOOTFS_COMPRESS_VALID(compress)) { 524 error = SET_ERROR(ENOTSUP); 525 } else { 526 objnum = dmu_objset_id(os); 527 } 528 dmu_objset_rele(os, FTAG); 529 } 530 break; 531 532 case ZPOOL_PROP_FAILUREMODE: 533 error = nvpair_value_uint64(elem, &intval); 534 if (!error && (intval < ZIO_FAILURE_MODE_WAIT || 535 intval > ZIO_FAILURE_MODE_PANIC)) 536 error = SET_ERROR(EINVAL); 537 538 /* 539 * This is a special case which only occurs when 540 * the pool has completely failed. This allows 541 * the user to change the in-core failmode property 542 * without syncing it out to disk (I/Os might 543 * currently be blocked). We do this by returning 544 * EIO to the caller (spa_prop_set) to trick it 545 * into thinking we encountered a property validation 546 * error. 547 */ 548 if (!error && spa_suspended(spa)) { 549 spa->spa_failmode = intval; 550 error = SET_ERROR(EIO); 551 } 552 break; 553 554 case ZPOOL_PROP_CACHEFILE: 555 if ((error = nvpair_value_string(elem, &strval)) != 0) 556 break; 557 558 if (strval[0] == '\0') 559 break; 560 561 if (strcmp(strval, "none") == 0) 562 break; 563 564 if (strval[0] != '/') { 565 error = SET_ERROR(EINVAL); 566 break; 567 } 568 569 slash = strrchr(strval, '/'); 570 ASSERT(slash != NULL); 571 572 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 573 strcmp(slash, "/..") == 0) 574 error = SET_ERROR(EINVAL); 575 break; 576 577 case ZPOOL_PROP_COMMENT: 578 if ((error = nvpair_value_string(elem, &strval)) != 0) 579 break; 580 for (check = strval; *check != '\0'; check++) { 581 /* 582 * The kernel doesn't have an easy isprint() 583 * check. For this kernel check, we merely 584 * check ASCII apart from DEL. Fix this if 585 * there is an easy-to-use kernel isprint(). 586 */ 587 if (*check >= 0x7f) { 588 error = SET_ERROR(EINVAL); 589 break; 590 } 591 check++; 592 } 593 if (strlen(strval) > ZPROP_MAX_COMMENT) 594 error = E2BIG; 595 break; 596 597 case ZPOOL_PROP_DEDUPDITTO: 598 if (spa_version(spa) < SPA_VERSION_DEDUP) 599 error = SET_ERROR(ENOTSUP); 600 else 601 error = nvpair_value_uint64(elem, &intval); 602 if (error == 0 && 603 intval != 0 && intval < ZIO_DEDUPDITTO_MIN) 604 error = SET_ERROR(EINVAL); 605 break; 606 } 607 608 if (error) 609 break; 610 } 611 612 if (!error && reset_bootfs) { 613 error = nvlist_remove(props, 614 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); 615 616 if (!error) { 617 error = nvlist_add_uint64(props, 618 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); 619 } 620 } 621 622 return (error); 623} 624 625void 626spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) 627{ 628 char *cachefile; 629 spa_config_dirent_t *dp; 630 631 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), 632 &cachefile) != 0) 633 return; 634 635 dp = kmem_alloc(sizeof (spa_config_dirent_t), 636 KM_SLEEP); 637 638 if (cachefile[0] == '\0') 639 dp->scd_path = spa_strdup(spa_config_path); 640 else if (strcmp(cachefile, "none") == 0) 641 dp->scd_path = NULL; 642 else 643 dp->scd_path = spa_strdup(cachefile); 644 645 list_insert_head(&spa->spa_config_list, dp); 646 if (need_sync) 647 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 648} 649 650int 651spa_prop_set(spa_t *spa, nvlist_t *nvp) 652{ 653 int error; 654 nvpair_t *elem = NULL; 655 boolean_t need_sync = B_FALSE; 656 657 if ((error = spa_prop_validate(spa, nvp)) != 0) 658 return (error); 659 660 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { 661 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); 662 663 if (prop == ZPOOL_PROP_CACHEFILE || 664 prop == ZPOOL_PROP_ALTROOT || 665 prop == ZPOOL_PROP_READONLY) 666 continue; 667 668 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) { 669 uint64_t ver; 670 671 if (prop == ZPOOL_PROP_VERSION) { 672 VERIFY(nvpair_value_uint64(elem, &ver) == 0); 673 } else { 674 ASSERT(zpool_prop_feature(nvpair_name(elem))); 675 ver = SPA_VERSION_FEATURES; 676 need_sync = B_TRUE; 677 } 678 679 /* Save time if the version is already set. */ 680 if (ver == spa_version(spa)) 681 continue; 682 683 /* 684 * In addition to the pool directory object, we might 685 * create the pool properties object, the features for 686 * read object, the features for write object, or the 687 * feature descriptions object. 688 */ 689 error = dsl_sync_task(spa->spa_name, NULL, 690 spa_sync_version, &ver, 691 6, ZFS_SPACE_CHECK_RESERVED); 692 if (error) 693 return (error); 694 continue; 695 } 696 697 need_sync = B_TRUE; 698 break; 699 } 700 701 if (need_sync) { 702 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props, 703 nvp, 6, ZFS_SPACE_CHECK_RESERVED)); 704 } 705 706 return (0); 707} 708 709/* 710 * If the bootfs property value is dsobj, clear it. 711 */ 712void 713spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) 714{ 715 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { 716 VERIFY(zap_remove(spa->spa_meta_objset, 717 spa->spa_pool_props_object, 718 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); 719 spa->spa_bootfs = 0; 720 } 721} 722 723/*ARGSUSED*/ 724static int 725spa_change_guid_check(void *arg, dmu_tx_t *tx) 726{ 727 uint64_t *newguid = arg; 728 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 729 vdev_t *rvd = spa->spa_root_vdev; 730 uint64_t vdev_state; 731 732 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 733 vdev_state = rvd->vdev_state; 734 spa_config_exit(spa, SCL_STATE, FTAG); 735 736 if (vdev_state != VDEV_STATE_HEALTHY) 737 return (SET_ERROR(ENXIO)); 738 739 ASSERT3U(spa_guid(spa), !=, *newguid); 740 741 return (0); 742} 743 744static void 745spa_change_guid_sync(void *arg, dmu_tx_t *tx) 746{ 747 uint64_t *newguid = arg; 748 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 749 uint64_t oldguid; 750 vdev_t *rvd = spa->spa_root_vdev; 751 752 oldguid = spa_guid(spa); 753 754 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 755 rvd->vdev_guid = *newguid; 756 rvd->vdev_guid_sum += (*newguid - oldguid); 757 vdev_config_dirty(rvd); 758 spa_config_exit(spa, SCL_STATE, FTAG); 759 760 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu", 761 oldguid, *newguid); 762} 763 764/* 765 * Change the GUID for the pool. This is done so that we can later 766 * re-import a pool built from a clone of our own vdevs. We will modify 767 * the root vdev's guid, our own pool guid, and then mark all of our 768 * vdevs dirty. Note that we must make sure that all our vdevs are 769 * online when we do this, or else any vdevs that weren't present 770 * would be orphaned from our pool. We are also going to issue a 771 * sysevent to update any watchers. 772 */ 773int 774spa_change_guid(spa_t *spa) 775{ 776 int error; 777 uint64_t guid; 778 779 mutex_enter(&spa->spa_vdev_top_lock); 780 mutex_enter(&spa_namespace_lock); 781 guid = spa_generate_guid(NULL); 782 783 error = dsl_sync_task(spa->spa_name, spa_change_guid_check, 784 spa_change_guid_sync, &guid, 5, ZFS_SPACE_CHECK_RESERVED); 785 786 if (error == 0) { 787 spa_config_sync(spa, B_FALSE, B_TRUE); 788 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID); 789 } 790 791 mutex_exit(&spa_namespace_lock); 792 mutex_exit(&spa->spa_vdev_top_lock); 793 794 return (error); 795} 796 797/* 798 * ========================================================================== 799 * SPA state manipulation (open/create/destroy/import/export) 800 * ========================================================================== 801 */ 802 803static int 804spa_error_entry_compare(const void *a, const void *b) 805{ 806 spa_error_entry_t *sa = (spa_error_entry_t *)a; 807 spa_error_entry_t *sb = (spa_error_entry_t *)b; 808 int ret; 809 810 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, 811 sizeof (zbookmark_phys_t)); 812 813 if (ret < 0) 814 return (-1); 815 else if (ret > 0) 816 return (1); 817 else 818 return (0); 819} 820 821/* 822 * Utility function which retrieves copies of the current logs and 823 * re-initializes them in the process. 824 */ 825void 826spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 827{ 828 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); 829 830 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); 831 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); 832 833 avl_create(&spa->spa_errlist_scrub, 834 spa_error_entry_compare, sizeof (spa_error_entry_t), 835 offsetof(spa_error_entry_t, se_avl)); 836 avl_create(&spa->spa_errlist_last, 837 spa_error_entry_compare, sizeof (spa_error_entry_t), 838 offsetof(spa_error_entry_t, se_avl)); 839} 840 841static void 842spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 843{ 844 const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; 845 enum zti_modes mode = ztip->zti_mode; 846 uint_t value = ztip->zti_value; 847 uint_t count = ztip->zti_count; 848 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 849 char name[32]; 850 uint_t flags = 0; 851 boolean_t batch = B_FALSE; 852 853 if (mode == ZTI_MODE_NULL) { 854 tqs->stqs_count = 0; 855 tqs->stqs_taskq = NULL; 856 return; 857 } 858 859 ASSERT3U(count, >, 0); 860 861 tqs->stqs_count = count; 862 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP); 863 864 switch (mode) { 865 case ZTI_MODE_FIXED: 866 ASSERT3U(value, >=, 1); 867 value = MAX(value, 1); 868 break; 869 870 case ZTI_MODE_BATCH: 871 batch = B_TRUE; 872 flags |= TASKQ_THREADS_CPU_PCT; 873 value = zio_taskq_batch_pct; 874 break; 875 876 default: 877 panic("unrecognized mode for %s_%s taskq (%u:%u) in " 878 "spa_activate()", 879 zio_type_name[t], zio_taskq_types[q], mode, value); 880 break; 881 } 882 883 for (uint_t i = 0; i < count; i++) { 884 taskq_t *tq; 885 886 if (count > 1) { 887 (void) snprintf(name, sizeof (name), "%s_%s_%u", 888 zio_type_name[t], zio_taskq_types[q], i); 889 } else { 890 (void) snprintf(name, sizeof (name), "%s_%s", 891 zio_type_name[t], zio_taskq_types[q]); 892 } 893 894#ifdef SYSDC 895 if (zio_taskq_sysdc && spa->spa_proc != &p0) { 896 if (batch) 897 flags |= TASKQ_DC_BATCH; 898 899 tq = taskq_create_sysdc(name, value, 50, INT_MAX, 900 spa->spa_proc, zio_taskq_basedc, flags); 901 } else { 902#endif 903 pri_t pri = maxclsyspri; 904 /* 905 * The write issue taskq can be extremely CPU 906 * intensive. Run it at slightly lower priority 907 * than the other taskqs. 908 */ 909 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) 910 pri--; 911 912 tq = taskq_create_proc(name, value, pri, 50, 913 INT_MAX, spa->spa_proc, flags); 914#ifdef SYSDC 915 } 916#endif 917 918 tqs->stqs_taskq[i] = tq; 919 } 920} 921 922static void 923spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 924{ 925 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 926 927 if (tqs->stqs_taskq == NULL) { 928 ASSERT0(tqs->stqs_count); 929 return; 930 } 931 932 for (uint_t i = 0; i < tqs->stqs_count; i++) { 933 ASSERT3P(tqs->stqs_taskq[i], !=, NULL); 934 taskq_destroy(tqs->stqs_taskq[i]); 935 } 936 937 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *)); 938 tqs->stqs_taskq = NULL; 939} 940 941/* 942 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority. 943 * Note that a type may have multiple discrete taskqs to avoid lock contention 944 * on the taskq itself. In that case we choose which taskq at random by using 945 * the low bits of gethrtime(). 946 */ 947void 948spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 949 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent) 950{ 951 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 952 taskq_t *tq; 953 954 ASSERT3P(tqs->stqs_taskq, !=, NULL); 955 ASSERT3U(tqs->stqs_count, !=, 0); 956 957 if (tqs->stqs_count == 1) { 958 tq = tqs->stqs_taskq[0]; 959 } else { 960#ifdef _KERNEL 961 tq = tqs->stqs_taskq[cpu_ticks() % tqs->stqs_count]; 962#else 963 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 964#endif 965 } 966 967 taskq_dispatch_ent(tq, func, arg, flags, ent); 968} 969 970static void 971spa_create_zio_taskqs(spa_t *spa) 972{ 973 for (int t = 0; t < ZIO_TYPES; t++) { 974 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 975 spa_taskqs_init(spa, t, q); 976 } 977 } 978} 979 980#ifdef _KERNEL 981#ifdef SPA_PROCESS 982static void 983spa_thread(void *arg) 984{ 985 callb_cpr_t cprinfo; 986 987 spa_t *spa = arg; 988 user_t *pu = PTOU(curproc); 989 990 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 991 spa->spa_name); 992 993 ASSERT(curproc != &p0); 994 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 995 "zpool-%s", spa->spa_name); 996 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 997 998#ifdef PSRSET_BIND 999 /* bind this thread to the requested psrset */ 1000 if (zio_taskq_psrset_bind != PS_NONE) { 1001 pool_lock(); 1002 mutex_enter(&cpu_lock); 1003 mutex_enter(&pidlock); 1004 mutex_enter(&curproc->p_lock); 1005 1006 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 1007 0, NULL, NULL) == 0) { 1008 curthread->t_bind_pset = zio_taskq_psrset_bind; 1009 } else { 1010 cmn_err(CE_WARN, 1011 "Couldn't bind process for zfs pool \"%s\" to " 1012 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1013 } 1014 1015 mutex_exit(&curproc->p_lock); 1016 mutex_exit(&pidlock); 1017 mutex_exit(&cpu_lock); 1018 pool_unlock(); 1019 } 1020#endif 1021 1022#ifdef SYSDC 1023 if (zio_taskq_sysdc) { 1024 sysdc_thread_enter(curthread, 100, 0); 1025 } 1026#endif 1027 1028 spa->spa_proc = curproc; 1029 spa->spa_did = curthread->t_did; 1030 1031 spa_create_zio_taskqs(spa); 1032 1033 mutex_enter(&spa->spa_proc_lock); 1034 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1035 1036 spa->spa_proc_state = SPA_PROC_ACTIVE; 1037 cv_broadcast(&spa->spa_proc_cv); 1038 1039 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1040 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1041 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1042 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1043 1044 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1045 spa->spa_proc_state = SPA_PROC_GONE; 1046 spa->spa_proc = &p0; 1047 cv_broadcast(&spa->spa_proc_cv); 1048 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1049 1050 mutex_enter(&curproc->p_lock); 1051 lwp_exit(); 1052} 1053#endif /* SPA_PROCESS */ 1054#endif 1055 1056/* 1057 * Activate an uninitialized pool. 1058 */ 1059static void 1060spa_activate(spa_t *spa, int mode) 1061{ 1062 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1063 1064 spa->spa_state = POOL_STATE_ACTIVE; 1065 spa->spa_mode = mode; 1066 1067 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1068 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1069 1070 /* Try to create a covering process */ 1071 mutex_enter(&spa->spa_proc_lock); 1072 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1073 ASSERT(spa->spa_proc == &p0); 1074 spa->spa_did = 0; 1075 1076#ifdef SPA_PROCESS 1077 /* Only create a process if we're going to be around a while. */ 1078 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1079 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1080 NULL, 0) == 0) { 1081 spa->spa_proc_state = SPA_PROC_CREATED; 1082 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1083 cv_wait(&spa->spa_proc_cv, 1084 &spa->spa_proc_lock); 1085 } 1086 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1087 ASSERT(spa->spa_proc != &p0); 1088 ASSERT(spa->spa_did != 0); 1089 } else { 1090#ifdef _KERNEL 1091 cmn_err(CE_WARN, 1092 "Couldn't create process for zfs pool \"%s\"\n", 1093 spa->spa_name); 1094#endif 1095 } 1096 } 1097#endif /* SPA_PROCESS */ 1098 mutex_exit(&spa->spa_proc_lock); 1099 1100 /* If we didn't create a process, we need to create our taskqs. */ 1101 ASSERT(spa->spa_proc == &p0); 1102 if (spa->spa_proc == &p0) { 1103 spa_create_zio_taskqs(spa); 1104 } 1105 1106 /* 1107 * Start TRIM thread. 1108 */ 1109 trim_thread_create(spa); 1110 1111 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1112 offsetof(vdev_t, vdev_config_dirty_node)); 1113 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1114 offsetof(vdev_t, vdev_state_dirty_node)); 1115 1116 txg_list_create(&spa->spa_vdev_txg_list, 1117 offsetof(struct vdev, vdev_txg_node)); 1118 1119 avl_create(&spa->spa_errlist_scrub, 1120 spa_error_entry_compare, sizeof (spa_error_entry_t), 1121 offsetof(spa_error_entry_t, se_avl)); 1122 avl_create(&spa->spa_errlist_last, 1123 spa_error_entry_compare, sizeof (spa_error_entry_t), 1124 offsetof(spa_error_entry_t, se_avl)); 1125} 1126 1127/* 1128 * Opposite of spa_activate(). 1129 */ 1130static void 1131spa_deactivate(spa_t *spa) 1132{ 1133 ASSERT(spa->spa_sync_on == B_FALSE); 1134 ASSERT(spa->spa_dsl_pool == NULL); 1135 ASSERT(spa->spa_root_vdev == NULL); 1136 ASSERT(spa->spa_async_zio_root == NULL); 1137 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1138 1139 /* 1140 * Stop TRIM thread in case spa_unload() wasn't called directly 1141 * before spa_deactivate(). 1142 */ 1143 trim_thread_destroy(spa); 1144 1145 txg_list_destroy(&spa->spa_vdev_txg_list); 1146 1147 list_destroy(&spa->spa_config_dirty_list); 1148 list_destroy(&spa->spa_state_dirty_list); 1149 1150 for (int t = 0; t < ZIO_TYPES; t++) { 1151 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1152 spa_taskqs_fini(spa, t, q); 1153 } 1154 } 1155 1156 metaslab_class_destroy(spa->spa_normal_class); 1157 spa->spa_normal_class = NULL; 1158 1159 metaslab_class_destroy(spa->spa_log_class); 1160 spa->spa_log_class = NULL; 1161 1162 /* 1163 * If this was part of an import or the open otherwise failed, we may 1164 * still have errors left in the queues. Empty them just in case. 1165 */ 1166 spa_errlog_drain(spa); 1167 1168 avl_destroy(&spa->spa_errlist_scrub); 1169 avl_destroy(&spa->spa_errlist_last); 1170 1171 spa->spa_state = POOL_STATE_UNINITIALIZED; 1172 1173 mutex_enter(&spa->spa_proc_lock); 1174 if (spa->spa_proc_state != SPA_PROC_NONE) { 1175 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1176 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1177 cv_broadcast(&spa->spa_proc_cv); 1178 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1179 ASSERT(spa->spa_proc != &p0); 1180 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1181 } 1182 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1183 spa->spa_proc_state = SPA_PROC_NONE; 1184 } 1185 ASSERT(spa->spa_proc == &p0); 1186 mutex_exit(&spa->spa_proc_lock); 1187 1188#ifdef SPA_PROCESS 1189 /* 1190 * We want to make sure spa_thread() has actually exited the ZFS 1191 * module, so that the module can't be unloaded out from underneath 1192 * it. 1193 */ 1194 if (spa->spa_did != 0) { 1195 thread_join(spa->spa_did); 1196 spa->spa_did = 0; 1197 } 1198#endif /* SPA_PROCESS */ 1199} 1200 1201/* 1202 * Verify a pool configuration, and construct the vdev tree appropriately. This 1203 * will create all the necessary vdevs in the appropriate layout, with each vdev 1204 * in the CLOSED state. This will prep the pool before open/creation/import. 1205 * All vdev validation is done by the vdev_alloc() routine. 1206 */ 1207static int 1208spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1209 uint_t id, int atype) 1210{ 1211 nvlist_t **child; 1212 uint_t children; 1213 int error; 1214 1215 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1216 return (error); 1217 1218 if ((*vdp)->vdev_ops->vdev_op_leaf) 1219 return (0); 1220 1221 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1222 &child, &children); 1223 1224 if (error == ENOENT) 1225 return (0); 1226 1227 if (error) { 1228 vdev_free(*vdp); 1229 *vdp = NULL; 1230 return (SET_ERROR(EINVAL)); 1231 } 1232 1233 for (int c = 0; c < children; c++) { 1234 vdev_t *vd; 1235 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1236 atype)) != 0) { 1237 vdev_free(*vdp); 1238 *vdp = NULL; 1239 return (error); 1240 } 1241 } 1242 1243 ASSERT(*vdp != NULL); 1244 1245 return (0); 1246} 1247 1248/* 1249 * Opposite of spa_load(). 1250 */ 1251static void 1252spa_unload(spa_t *spa) 1253{ 1254 int i; 1255 1256 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1257 1258 /* 1259 * Stop TRIM thread. 1260 */ 1261 trim_thread_destroy(spa); 1262 1263 /* 1264 * Stop async tasks. 1265 */ 1266 spa_async_suspend(spa); 1267 1268 /* 1269 * Stop syncing. 1270 */ 1271 if (spa->spa_sync_on) { 1272 txg_sync_stop(spa->spa_dsl_pool); 1273 spa->spa_sync_on = B_FALSE; 1274 } 1275 1276 /* 1277 * Wait for any outstanding async I/O to complete. 1278 */ 1279 if (spa->spa_async_zio_root != NULL) { 1280 (void) zio_wait(spa->spa_async_zio_root); 1281 spa->spa_async_zio_root = NULL; 1282 } 1283 1284 bpobj_close(&spa->spa_deferred_bpobj); 1285 1286 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1287 1288 /* 1289 * Close all vdevs. 1290 */ 1291 if (spa->spa_root_vdev) 1292 vdev_free(spa->spa_root_vdev); 1293 ASSERT(spa->spa_root_vdev == NULL); 1294 1295 /* 1296 * Close the dsl pool. 1297 */ 1298 if (spa->spa_dsl_pool) { 1299 dsl_pool_close(spa->spa_dsl_pool); 1300 spa->spa_dsl_pool = NULL; 1301 spa->spa_meta_objset = NULL; 1302 } 1303 1304 ddt_unload(spa); 1305 1306 1307 /* 1308 * Drop and purge level 2 cache 1309 */ 1310 spa_l2cache_drop(spa); 1311 1312 for (i = 0; i < spa->spa_spares.sav_count; i++) 1313 vdev_free(spa->spa_spares.sav_vdevs[i]); 1314 if (spa->spa_spares.sav_vdevs) { 1315 kmem_free(spa->spa_spares.sav_vdevs, 1316 spa->spa_spares.sav_count * sizeof (void *)); 1317 spa->spa_spares.sav_vdevs = NULL; 1318 } 1319 if (spa->spa_spares.sav_config) { 1320 nvlist_free(spa->spa_spares.sav_config); 1321 spa->spa_spares.sav_config = NULL; 1322 } 1323 spa->spa_spares.sav_count = 0; 1324 1325 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1326 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1327 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1328 } 1329 if (spa->spa_l2cache.sav_vdevs) { 1330 kmem_free(spa->spa_l2cache.sav_vdevs, 1331 spa->spa_l2cache.sav_count * sizeof (void *)); 1332 spa->spa_l2cache.sav_vdevs = NULL; 1333 } 1334 if (spa->spa_l2cache.sav_config) { 1335 nvlist_free(spa->spa_l2cache.sav_config); 1336 spa->spa_l2cache.sav_config = NULL; 1337 } 1338 spa->spa_l2cache.sav_count = 0; 1339 1340 spa->spa_async_suspended = 0; 1341 1342 if (spa->spa_comment != NULL) { 1343 spa_strfree(spa->spa_comment); 1344 spa->spa_comment = NULL; 1345 } 1346 1347 spa_config_exit(spa, SCL_ALL, FTAG); 1348} 1349 1350/* 1351 * Load (or re-load) the current list of vdevs describing the active spares for 1352 * this pool. When this is called, we have some form of basic information in 1353 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1354 * then re-generate a more complete list including status information. 1355 */ 1356static void 1357spa_load_spares(spa_t *spa) 1358{ 1359 nvlist_t **spares; 1360 uint_t nspares; 1361 int i; 1362 vdev_t *vd, *tvd; 1363 1364 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1365 1366 /* 1367 * First, close and free any existing spare vdevs. 1368 */ 1369 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1370 vd = spa->spa_spares.sav_vdevs[i]; 1371 1372 /* Undo the call to spa_activate() below */ 1373 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1374 B_FALSE)) != NULL && tvd->vdev_isspare) 1375 spa_spare_remove(tvd); 1376 vdev_close(vd); 1377 vdev_free(vd); 1378 } 1379 1380 if (spa->spa_spares.sav_vdevs) 1381 kmem_free(spa->spa_spares.sav_vdevs, 1382 spa->spa_spares.sav_count * sizeof (void *)); 1383 1384 if (spa->spa_spares.sav_config == NULL) 1385 nspares = 0; 1386 else 1387 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1388 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1389 1390 spa->spa_spares.sav_count = (int)nspares; 1391 spa->spa_spares.sav_vdevs = NULL; 1392 1393 if (nspares == 0) 1394 return; 1395 1396 /* 1397 * Construct the array of vdevs, opening them to get status in the 1398 * process. For each spare, there is potentially two different vdev_t 1399 * structures associated with it: one in the list of spares (used only 1400 * for basic validation purposes) and one in the active vdev 1401 * configuration (if it's spared in). During this phase we open and 1402 * validate each vdev on the spare list. If the vdev also exists in the 1403 * active configuration, then we also mark this vdev as an active spare. 1404 */ 1405 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1406 KM_SLEEP); 1407 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1408 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1409 VDEV_ALLOC_SPARE) == 0); 1410 ASSERT(vd != NULL); 1411 1412 spa->spa_spares.sav_vdevs[i] = vd; 1413 1414 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1415 B_FALSE)) != NULL) { 1416 if (!tvd->vdev_isspare) 1417 spa_spare_add(tvd); 1418 1419 /* 1420 * We only mark the spare active if we were successfully 1421 * able to load the vdev. Otherwise, importing a pool 1422 * with a bad active spare would result in strange 1423 * behavior, because multiple pool would think the spare 1424 * is actively in use. 1425 * 1426 * There is a vulnerability here to an equally bizarre 1427 * circumstance, where a dead active spare is later 1428 * brought back to life (onlined or otherwise). Given 1429 * the rarity of this scenario, and the extra complexity 1430 * it adds, we ignore the possibility. 1431 */ 1432 if (!vdev_is_dead(tvd)) 1433 spa_spare_activate(tvd); 1434 } 1435 1436 vd->vdev_top = vd; 1437 vd->vdev_aux = &spa->spa_spares; 1438 1439 if (vdev_open(vd) != 0) 1440 continue; 1441 1442 if (vdev_validate_aux(vd) == 0) 1443 spa_spare_add(vd); 1444 } 1445 1446 /* 1447 * Recompute the stashed list of spares, with status information 1448 * this time. 1449 */ 1450 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1451 DATA_TYPE_NVLIST_ARRAY) == 0); 1452 1453 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1454 KM_SLEEP); 1455 for (i = 0; i < spa->spa_spares.sav_count; i++) 1456 spares[i] = vdev_config_generate(spa, 1457 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1458 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1459 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1460 for (i = 0; i < spa->spa_spares.sav_count; i++) 1461 nvlist_free(spares[i]); 1462 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1463} 1464 1465/* 1466 * Load (or re-load) the current list of vdevs describing the active l2cache for 1467 * this pool. When this is called, we have some form of basic information in 1468 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1469 * then re-generate a more complete list including status information. 1470 * Devices which are already active have their details maintained, and are 1471 * not re-opened. 1472 */ 1473static void 1474spa_load_l2cache(spa_t *spa) 1475{ 1476 nvlist_t **l2cache; 1477 uint_t nl2cache; 1478 int i, j, oldnvdevs; 1479 uint64_t guid; 1480 vdev_t *vd, **oldvdevs, **newvdevs; 1481 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1482 1483 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1484 1485 if (sav->sav_config != NULL) { 1486 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1487 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1488 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1489 } else { 1490 nl2cache = 0; 1491 newvdevs = NULL; 1492 } 1493 1494 oldvdevs = sav->sav_vdevs; 1495 oldnvdevs = sav->sav_count; 1496 sav->sav_vdevs = NULL; 1497 sav->sav_count = 0; 1498 1499 /* 1500 * Process new nvlist of vdevs. 1501 */ 1502 for (i = 0; i < nl2cache; i++) { 1503 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1504 &guid) == 0); 1505 1506 newvdevs[i] = NULL; 1507 for (j = 0; j < oldnvdevs; j++) { 1508 vd = oldvdevs[j]; 1509 if (vd != NULL && guid == vd->vdev_guid) { 1510 /* 1511 * Retain previous vdev for add/remove ops. 1512 */ 1513 newvdevs[i] = vd; 1514 oldvdevs[j] = NULL; 1515 break; 1516 } 1517 } 1518 1519 if (newvdevs[i] == NULL) { 1520 /* 1521 * Create new vdev 1522 */ 1523 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1524 VDEV_ALLOC_L2CACHE) == 0); 1525 ASSERT(vd != NULL); 1526 newvdevs[i] = vd; 1527 1528 /* 1529 * Commit this vdev as an l2cache device, 1530 * even if it fails to open. 1531 */ 1532 spa_l2cache_add(vd); 1533 1534 vd->vdev_top = vd; 1535 vd->vdev_aux = sav; 1536 1537 spa_l2cache_activate(vd); 1538 1539 if (vdev_open(vd) != 0) 1540 continue; 1541 1542 (void) vdev_validate_aux(vd); 1543 1544 if (!vdev_is_dead(vd)) 1545 l2arc_add_vdev(spa, vd); 1546 } 1547 } 1548 1549 /* 1550 * Purge vdevs that were dropped 1551 */ 1552 for (i = 0; i < oldnvdevs; i++) { 1553 uint64_t pool; 1554 1555 vd = oldvdevs[i]; 1556 if (vd != NULL) { 1557 ASSERT(vd->vdev_isl2cache); 1558 1559 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1560 pool != 0ULL && l2arc_vdev_present(vd)) 1561 l2arc_remove_vdev(vd); 1562 vdev_clear_stats(vd); 1563 vdev_free(vd); 1564 } 1565 } 1566 1567 if (oldvdevs) 1568 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1569 1570 if (sav->sav_config == NULL) 1571 goto out; 1572 1573 sav->sav_vdevs = newvdevs; 1574 sav->sav_count = (int)nl2cache; 1575 1576 /* 1577 * Recompute the stashed list of l2cache devices, with status 1578 * information this time. 1579 */ 1580 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1581 DATA_TYPE_NVLIST_ARRAY) == 0); 1582 1583 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1584 for (i = 0; i < sav->sav_count; i++) 1585 l2cache[i] = vdev_config_generate(spa, 1586 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1587 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1588 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1589out: 1590 for (i = 0; i < sav->sav_count; i++) 1591 nvlist_free(l2cache[i]); 1592 if (sav->sav_count) 1593 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1594} 1595 1596static int 1597load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1598{ 1599 dmu_buf_t *db; 1600 char *packed = NULL; 1601 size_t nvsize = 0; 1602 int error; 1603 *value = NULL; 1604 1605 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1606 if (error != 0) 1607 return (error); 1608 nvsize = *(uint64_t *)db->db_data; 1609 dmu_buf_rele(db, FTAG); 1610 1611 packed = kmem_alloc(nvsize, KM_SLEEP); 1612 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1613 DMU_READ_PREFETCH); 1614 if (error == 0) 1615 error = nvlist_unpack(packed, nvsize, value, 0); 1616 kmem_free(packed, nvsize); 1617 1618 return (error); 1619} 1620 1621/* 1622 * Checks to see if the given vdev could not be opened, in which case we post a 1623 * sysevent to notify the autoreplace code that the device has been removed. 1624 */ 1625static void 1626spa_check_removed(vdev_t *vd) 1627{ 1628 for (int c = 0; c < vd->vdev_children; c++) 1629 spa_check_removed(vd->vdev_child[c]); 1630 1631 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1632 !vd->vdev_ishole) { 1633 zfs_post_autoreplace(vd->vdev_spa, vd); 1634 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); 1635 } 1636} 1637 1638/* 1639 * Validate the current config against the MOS config 1640 */ 1641static boolean_t 1642spa_config_valid(spa_t *spa, nvlist_t *config) 1643{ 1644 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 1645 nvlist_t *nv; 1646 1647 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); 1648 1649 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1650 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 1651 1652 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); 1653 1654 /* 1655 * If we're doing a normal import, then build up any additional 1656 * diagnostic information about missing devices in this config. 1657 * We'll pass this up to the user for further processing. 1658 */ 1659 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1660 nvlist_t **child, *nv; 1661 uint64_t idx = 0; 1662 1663 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1664 KM_SLEEP); 1665 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1666 1667 for (int c = 0; c < rvd->vdev_children; c++) { 1668 vdev_t *tvd = rvd->vdev_child[c]; 1669 vdev_t *mtvd = mrvd->vdev_child[c]; 1670 1671 if (tvd->vdev_ops == &vdev_missing_ops && 1672 mtvd->vdev_ops != &vdev_missing_ops && 1673 mtvd->vdev_islog) 1674 child[idx++] = vdev_config_generate(spa, mtvd, 1675 B_FALSE, 0); 1676 } 1677 1678 if (idx) { 1679 VERIFY(nvlist_add_nvlist_array(nv, 1680 ZPOOL_CONFIG_CHILDREN, child, idx) == 0); 1681 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 1682 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); 1683 1684 for (int i = 0; i < idx; i++) 1685 nvlist_free(child[i]); 1686 } 1687 nvlist_free(nv); 1688 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1689 } 1690 1691 /* 1692 * Compare the root vdev tree with the information we have 1693 * from the MOS config (mrvd). Check each top-level vdev 1694 * with the corresponding MOS config top-level (mtvd). 1695 */ 1696 for (int c = 0; c < rvd->vdev_children; c++) { 1697 vdev_t *tvd = rvd->vdev_child[c]; 1698 vdev_t *mtvd = mrvd->vdev_child[c]; 1699 1700 /* 1701 * Resolve any "missing" vdevs in the current configuration. 1702 * If we find that the MOS config has more accurate information 1703 * about the top-level vdev then use that vdev instead. 1704 */ 1705 if (tvd->vdev_ops == &vdev_missing_ops && 1706 mtvd->vdev_ops != &vdev_missing_ops) { 1707 1708 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) 1709 continue; 1710 1711 /* 1712 * Device specific actions. 1713 */ 1714 if (mtvd->vdev_islog) { 1715 spa_set_log_state(spa, SPA_LOG_CLEAR); 1716 } else { 1717 /* 1718 * XXX - once we have 'readonly' pool 1719 * support we should be able to handle 1720 * missing data devices by transitioning 1721 * the pool to readonly. 1722 */ 1723 continue; 1724 } 1725 1726 /* 1727 * Swap the missing vdev with the data we were 1728 * able to obtain from the MOS config. 1729 */ 1730 vdev_remove_child(rvd, tvd); 1731 vdev_remove_child(mrvd, mtvd); 1732 1733 vdev_add_child(rvd, mtvd); 1734 vdev_add_child(mrvd, tvd); 1735 1736 spa_config_exit(spa, SCL_ALL, FTAG); 1737 vdev_load(mtvd); 1738 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1739 1740 vdev_reopen(rvd); 1741 } else if (mtvd->vdev_islog) { 1742 /* 1743 * Load the slog device's state from the MOS config 1744 * since it's possible that the label does not 1745 * contain the most up-to-date information. 1746 */ 1747 vdev_load_log_state(tvd, mtvd); 1748 vdev_reopen(tvd); 1749 } 1750 } 1751 vdev_free(mrvd); 1752 spa_config_exit(spa, SCL_ALL, FTAG); 1753 1754 /* 1755 * Ensure we were able to validate the config. 1756 */ 1757 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); 1758} 1759 1760/* 1761 * Check for missing log devices 1762 */ 1763static boolean_t 1764spa_check_logs(spa_t *spa) 1765{ 1766 boolean_t rv = B_FALSE; 1767 1768 switch (spa->spa_log_state) { 1769 case SPA_LOG_MISSING: 1770 /* need to recheck in case slog has been restored */ 1771 case SPA_LOG_UNKNOWN: 1772 rv = (dmu_objset_find(spa->spa_name, zil_check_log_chain, 1773 NULL, DS_FIND_CHILDREN) != 0); 1774 if (rv) 1775 spa_set_log_state(spa, SPA_LOG_MISSING); 1776 break; 1777 } 1778 return (rv); 1779} 1780 1781static boolean_t 1782spa_passivate_log(spa_t *spa) 1783{ 1784 vdev_t *rvd = spa->spa_root_vdev; 1785 boolean_t slog_found = B_FALSE; 1786 1787 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1788 1789 if (!spa_has_slogs(spa)) 1790 return (B_FALSE); 1791 1792 for (int c = 0; c < rvd->vdev_children; c++) { 1793 vdev_t *tvd = rvd->vdev_child[c]; 1794 metaslab_group_t *mg = tvd->vdev_mg; 1795 1796 if (tvd->vdev_islog) { 1797 metaslab_group_passivate(mg); 1798 slog_found = B_TRUE; 1799 } 1800 } 1801 1802 return (slog_found); 1803} 1804 1805static void 1806spa_activate_log(spa_t *spa) 1807{ 1808 vdev_t *rvd = spa->spa_root_vdev; 1809 1810 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1811 1812 for (int c = 0; c < rvd->vdev_children; c++) { 1813 vdev_t *tvd = rvd->vdev_child[c]; 1814 metaslab_group_t *mg = tvd->vdev_mg; 1815 1816 if (tvd->vdev_islog) 1817 metaslab_group_activate(mg); 1818 } 1819} 1820 1821int 1822spa_offline_log(spa_t *spa) 1823{ 1824 int error; 1825 1826 error = dmu_objset_find(spa_name(spa), zil_vdev_offline, 1827 NULL, DS_FIND_CHILDREN); 1828 if (error == 0) { 1829 /* 1830 * We successfully offlined the log device, sync out the 1831 * current txg so that the "stubby" block can be removed 1832 * by zil_sync(). 1833 */ 1834 txg_wait_synced(spa->spa_dsl_pool, 0); 1835 } 1836 return (error); 1837} 1838 1839static void 1840spa_aux_check_removed(spa_aux_vdev_t *sav) 1841{ 1842 int i; 1843 1844 for (i = 0; i < sav->sav_count; i++) 1845 spa_check_removed(sav->sav_vdevs[i]); 1846} 1847 1848void 1849spa_claim_notify(zio_t *zio) 1850{ 1851 spa_t *spa = zio->io_spa; 1852 1853 if (zio->io_error) 1854 return; 1855 1856 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1857 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1858 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1859 mutex_exit(&spa->spa_props_lock); 1860} 1861 1862typedef struct spa_load_error { 1863 uint64_t sle_meta_count; 1864 uint64_t sle_data_count; 1865} spa_load_error_t; 1866 1867static void 1868spa_load_verify_done(zio_t *zio) 1869{ 1870 blkptr_t *bp = zio->io_bp; 1871 spa_load_error_t *sle = zio->io_private; 1872 dmu_object_type_t type = BP_GET_TYPE(bp); 1873 int error = zio->io_error; 1874 spa_t *spa = zio->io_spa; 1875 1876 if (error) { 1877 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 1878 type != DMU_OT_INTENT_LOG) 1879 atomic_inc_64(&sle->sle_meta_count); 1880 else 1881 atomic_inc_64(&sle->sle_data_count); 1882 } 1883 zio_data_buf_free(zio->io_data, zio->io_size); 1884 1885 mutex_enter(&spa->spa_scrub_lock); 1886 spa->spa_scrub_inflight--; 1887 cv_broadcast(&spa->spa_scrub_io_cv); 1888 mutex_exit(&spa->spa_scrub_lock); 1889} 1890 1891/* 1892 * Maximum number of concurrent scrub i/os to create while verifying 1893 * a pool while importing it. 1894 */ 1895int spa_load_verify_maxinflight = 10000; 1896boolean_t spa_load_verify_metadata = B_TRUE; 1897boolean_t spa_load_verify_data = B_TRUE; 1898 1899SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_maxinflight, CTLFLAG_RWTUN, 1900 &spa_load_verify_maxinflight, 0, 1901 "Maximum number of concurrent scrub I/Os to create while verifying a " 1902 "pool while importing it"); 1903 1904SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_metadata, CTLFLAG_RWTUN, 1905 &spa_load_verify_metadata, 0, 1906 "Check metadata on import?"); 1907 1908SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_data, CTLFLAG_RWTUN, 1909 &spa_load_verify_data, 0, 1910 "Check user data on import?"); 1911 1912/*ARGSUSED*/ 1913static int 1914spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1915 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 1916{ 1917 if (BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp)) 1918 return (0); 1919 /* 1920 * Note: normally this routine will not be called if 1921 * spa_load_verify_metadata is not set. However, it may be useful 1922 * to manually set the flag after the traversal has begun. 1923 */ 1924 if (!spa_load_verify_metadata) 1925 return (0); 1926 if (BP_GET_BUFC_TYPE(bp) == ARC_BUFC_DATA && !spa_load_verify_data) 1927 return (0); 1928 1929 zio_t *rio = arg; 1930 size_t size = BP_GET_PSIZE(bp); 1931 void *data = zio_data_buf_alloc(size); 1932 1933 mutex_enter(&spa->spa_scrub_lock); 1934 while (spa->spa_scrub_inflight >= spa_load_verify_maxinflight) 1935 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); 1936 spa->spa_scrub_inflight++; 1937 mutex_exit(&spa->spa_scrub_lock); 1938 1939 zio_nowait(zio_read(rio, spa, bp, data, size, 1940 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 1941 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 1942 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 1943 return (0); 1944} 1945 1946static int 1947spa_load_verify(spa_t *spa) 1948{ 1949 zio_t *rio; 1950 spa_load_error_t sle = { 0 }; 1951 zpool_rewind_policy_t policy; 1952 boolean_t verify_ok = B_FALSE; 1953 int error = 0; 1954 1955 zpool_get_rewind_policy(spa->spa_config, &policy); 1956 1957 if (policy.zrp_request & ZPOOL_NEVER_REWIND) 1958 return (0); 1959 1960 rio = zio_root(spa, NULL, &sle, 1961 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1962 1963 if (spa_load_verify_metadata) { 1964 error = traverse_pool(spa, spa->spa_verify_min_txg, 1965 TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA, 1966 spa_load_verify_cb, rio); 1967 } 1968 1969 (void) zio_wait(rio); 1970 1971 spa->spa_load_meta_errors = sle.sle_meta_count; 1972 spa->spa_load_data_errors = sle.sle_data_count; 1973 1974 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && 1975 sle.sle_data_count <= policy.zrp_maxdata) { 1976 int64_t loss = 0; 1977 1978 verify_ok = B_TRUE; 1979 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 1980 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 1981 1982 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 1983 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1984 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 1985 VERIFY(nvlist_add_int64(spa->spa_load_info, 1986 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 1987 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1988 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 1989 } else { 1990 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 1991 } 1992 1993 if (error) { 1994 if (error != ENXIO && error != EIO) 1995 error = SET_ERROR(EIO); 1996 return (error); 1997 } 1998 1999 return (verify_ok ? 0 : EIO); 2000} 2001 2002/* 2003 * Find a value in the pool props object. 2004 */ 2005static void 2006spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 2007{ 2008 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 2009 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 2010} 2011 2012/* 2013 * Find a value in the pool directory object. 2014 */ 2015static int 2016spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) 2017{ 2018 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 2019 name, sizeof (uint64_t), 1, val)); 2020} 2021 2022static int 2023spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 2024{ 2025 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 2026 return (err); 2027} 2028 2029/* 2030 * Fix up config after a partly-completed split. This is done with the 2031 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 2032 * pool have that entry in their config, but only the splitting one contains 2033 * a list of all the guids of the vdevs that are being split off. 2034 * 2035 * This function determines what to do with that list: either rejoin 2036 * all the disks to the pool, or complete the splitting process. To attempt 2037 * the rejoin, each disk that is offlined is marked online again, and 2038 * we do a reopen() call. If the vdev label for every disk that was 2039 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 2040 * then we call vdev_split() on each disk, and complete the split. 2041 * 2042 * Otherwise we leave the config alone, with all the vdevs in place in 2043 * the original pool. 2044 */ 2045static void 2046spa_try_repair(spa_t *spa, nvlist_t *config) 2047{ 2048 uint_t extracted; 2049 uint64_t *glist; 2050 uint_t i, gcount; 2051 nvlist_t *nvl; 2052 vdev_t **vd; 2053 boolean_t attempt_reopen; 2054 2055 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2056 return; 2057 2058 /* check that the config is complete */ 2059 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2060 &glist, &gcount) != 0) 2061 return; 2062 2063 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2064 2065 /* attempt to online all the vdevs & validate */ 2066 attempt_reopen = B_TRUE; 2067 for (i = 0; i < gcount; i++) { 2068 if (glist[i] == 0) /* vdev is hole */ 2069 continue; 2070 2071 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2072 if (vd[i] == NULL) { 2073 /* 2074 * Don't bother attempting to reopen the disks; 2075 * just do the split. 2076 */ 2077 attempt_reopen = B_FALSE; 2078 } else { 2079 /* attempt to re-online it */ 2080 vd[i]->vdev_offline = B_FALSE; 2081 } 2082 } 2083 2084 if (attempt_reopen) { 2085 vdev_reopen(spa->spa_root_vdev); 2086 2087 /* check each device to see what state it's in */ 2088 for (extracted = 0, i = 0; i < gcount; i++) { 2089 if (vd[i] != NULL && 2090 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2091 break; 2092 ++extracted; 2093 } 2094 } 2095 2096 /* 2097 * If every disk has been moved to the new pool, or if we never 2098 * even attempted to look at them, then we split them off for 2099 * good. 2100 */ 2101 if (!attempt_reopen || gcount == extracted) { 2102 for (i = 0; i < gcount; i++) 2103 if (vd[i] != NULL) 2104 vdev_split(vd[i]); 2105 vdev_reopen(spa->spa_root_vdev); 2106 } 2107 2108 kmem_free(vd, gcount * sizeof (vdev_t *)); 2109} 2110 2111static int 2112spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, 2113 boolean_t mosconfig) 2114{ 2115 nvlist_t *config = spa->spa_config; 2116 char *ereport = FM_EREPORT_ZFS_POOL; 2117 char *comment; 2118 int error; 2119 uint64_t pool_guid; 2120 nvlist_t *nvl; 2121 2122 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) 2123 return (SET_ERROR(EINVAL)); 2124 2125 ASSERT(spa->spa_comment == NULL); 2126 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2127 spa->spa_comment = spa_strdup(comment); 2128 2129 /* 2130 * Versioning wasn't explicitly added to the label until later, so if 2131 * it's not present treat it as the initial version. 2132 */ 2133 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2134 &spa->spa_ubsync.ub_version) != 0) 2135 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2136 2137 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2138 &spa->spa_config_txg); 2139 2140 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && 2141 spa_guid_exists(pool_guid, 0)) { 2142 error = SET_ERROR(EEXIST); 2143 } else { 2144 spa->spa_config_guid = pool_guid; 2145 2146 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, 2147 &nvl) == 0) { 2148 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, 2149 KM_SLEEP) == 0); 2150 } 2151 2152 nvlist_free(spa->spa_load_info); 2153 spa->spa_load_info = fnvlist_alloc(); 2154 2155 gethrestime(&spa->spa_loaded_ts); 2156 error = spa_load_impl(spa, pool_guid, config, state, type, 2157 mosconfig, &ereport); 2158 } 2159 2160 spa->spa_minref = refcount_count(&spa->spa_refcount); 2161 if (error) { 2162 if (error != EEXIST) { 2163 spa->spa_loaded_ts.tv_sec = 0; 2164 spa->spa_loaded_ts.tv_nsec = 0; 2165 } 2166 if (error != EBADF) { 2167 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); 2168 } 2169 } 2170 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2171 spa->spa_ena = 0; 2172 2173 return (error); 2174} 2175 2176/* 2177 * Load an existing storage pool, using the pool's builtin spa_config as a 2178 * source of configuration information. 2179 */ 2180static int 2181spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, 2182 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 2183 char **ereport) 2184{ 2185 int error = 0; 2186 nvlist_t *nvroot = NULL; 2187 nvlist_t *label; 2188 vdev_t *rvd; 2189 uberblock_t *ub = &spa->spa_uberblock; 2190 uint64_t children, config_cache_txg = spa->spa_config_txg; 2191 int orig_mode = spa->spa_mode; 2192 int parse; 2193 uint64_t obj; 2194 boolean_t missing_feat_write = B_FALSE; 2195 2196 /* 2197 * If this is an untrusted config, access the pool in read-only mode. 2198 * This prevents things like resilvering recently removed devices. 2199 */ 2200 if (!mosconfig) 2201 spa->spa_mode = FREAD; 2202 2203 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2204 2205 spa->spa_load_state = state; 2206 2207 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) 2208 return (SET_ERROR(EINVAL)); 2209 2210 parse = (type == SPA_IMPORT_EXISTING ? 2211 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2212 2213 /* 2214 * Create "The Godfather" zio to hold all async IOs 2215 */ 2216 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 2217 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 2218 2219 /* 2220 * Parse the configuration into a vdev tree. We explicitly set the 2221 * value that will be returned by spa_version() since parsing the 2222 * configuration requires knowing the version number. 2223 */ 2224 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2225 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); 2226 spa_config_exit(spa, SCL_ALL, FTAG); 2227 2228 if (error != 0) 2229 return (error); 2230 2231 ASSERT(spa->spa_root_vdev == rvd); 2232 2233 if (type != SPA_IMPORT_ASSEMBLE) { 2234 ASSERT(spa_guid(spa) == pool_guid); 2235 } 2236 2237 /* 2238 * Try to open all vdevs, loading each label in the process. 2239 */ 2240 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2241 error = vdev_open(rvd); 2242 spa_config_exit(spa, SCL_ALL, FTAG); 2243 if (error != 0) 2244 return (error); 2245 2246 /* 2247 * We need to validate the vdev labels against the configuration that 2248 * we have in hand, which is dependent on the setting of mosconfig. If 2249 * mosconfig is true then we're validating the vdev labels based on 2250 * that config. Otherwise, we're validating against the cached config 2251 * (zpool.cache) that was read when we loaded the zfs module, and then 2252 * later we will recursively call spa_load() and validate against 2253 * the vdev config. 2254 * 2255 * If we're assembling a new pool that's been split off from an 2256 * existing pool, the labels haven't yet been updated so we skip 2257 * validation for now. 2258 */ 2259 if (type != SPA_IMPORT_ASSEMBLE) { 2260 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2261 error = vdev_validate(rvd, mosconfig); 2262 spa_config_exit(spa, SCL_ALL, FTAG); 2263 2264 if (error != 0) 2265 return (error); 2266 2267 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2268 return (SET_ERROR(ENXIO)); 2269 } 2270 2271 /* 2272 * Find the best uberblock. 2273 */ 2274 vdev_uberblock_load(rvd, ub, &label); 2275 2276 /* 2277 * If we weren't able to find a single valid uberblock, return failure. 2278 */ 2279 if (ub->ub_txg == 0) { 2280 nvlist_free(label); 2281 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2282 } 2283 2284 /* 2285 * If the pool has an unsupported version we can't open it. 2286 */ 2287 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2288 nvlist_free(label); 2289 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2290 } 2291 2292 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2293 nvlist_t *features; 2294 2295 /* 2296 * If we weren't able to find what's necessary for reading the 2297 * MOS in the label, return failure. 2298 */ 2299 if (label == NULL || nvlist_lookup_nvlist(label, 2300 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { 2301 nvlist_free(label); 2302 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2303 ENXIO)); 2304 } 2305 2306 /* 2307 * Update our in-core representation with the definitive values 2308 * from the label. 2309 */ 2310 nvlist_free(spa->spa_label_features); 2311 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2312 } 2313 2314 nvlist_free(label); 2315 2316 /* 2317 * Look through entries in the label nvlist's features_for_read. If 2318 * there is a feature listed there which we don't understand then we 2319 * cannot open a pool. 2320 */ 2321 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2322 nvlist_t *unsup_feat; 2323 2324 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2325 0); 2326 2327 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2328 NULL); nvp != NULL; 2329 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2330 if (!zfeature_is_supported(nvpair_name(nvp))) { 2331 VERIFY(nvlist_add_string(unsup_feat, 2332 nvpair_name(nvp), "") == 0); 2333 } 2334 } 2335 2336 if (!nvlist_empty(unsup_feat)) { 2337 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2338 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2339 nvlist_free(unsup_feat); 2340 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2341 ENOTSUP)); 2342 } 2343 2344 nvlist_free(unsup_feat); 2345 } 2346 2347 /* 2348 * If the vdev guid sum doesn't match the uberblock, we have an 2349 * incomplete configuration. We first check to see if the pool 2350 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). 2351 * If it is, defer the vdev_guid_sum check till later so we 2352 * can handle missing vdevs. 2353 */ 2354 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, 2355 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && 2356 rvd->vdev_guid_sum != ub->ub_guid_sum) 2357 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 2358 2359 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2360 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2361 spa_try_repair(spa, config); 2362 spa_config_exit(spa, SCL_ALL, FTAG); 2363 nvlist_free(spa->spa_config_splitting); 2364 spa->spa_config_splitting = NULL; 2365 } 2366 2367 /* 2368 * Initialize internal SPA structures. 2369 */ 2370 spa->spa_state = POOL_STATE_ACTIVE; 2371 spa->spa_ubsync = spa->spa_uberblock; 2372 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2373 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2374 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2375 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2376 spa->spa_claim_max_txg = spa->spa_first_txg; 2377 spa->spa_prev_software_version = ub->ub_software_version; 2378 2379 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2380 if (error) 2381 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2382 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2383 2384 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) 2385 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2386 2387 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 2388 boolean_t missing_feat_read = B_FALSE; 2389 nvlist_t *unsup_feat, *enabled_feat; 2390 2391 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 2392 &spa->spa_feat_for_read_obj) != 0) { 2393 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2394 } 2395 2396 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 2397 &spa->spa_feat_for_write_obj) != 0) { 2398 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2399 } 2400 2401 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 2402 &spa->spa_feat_desc_obj) != 0) { 2403 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2404 } 2405 2406 enabled_feat = fnvlist_alloc(); 2407 unsup_feat = fnvlist_alloc(); 2408 2409 if (!spa_features_check(spa, B_FALSE, 2410 unsup_feat, enabled_feat)) 2411 missing_feat_read = B_TRUE; 2412 2413 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { 2414 if (!spa_features_check(spa, B_TRUE, 2415 unsup_feat, enabled_feat)) { 2416 missing_feat_write = B_TRUE; 2417 } 2418 } 2419 2420 fnvlist_add_nvlist(spa->spa_load_info, 2421 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 2422 2423 if (!nvlist_empty(unsup_feat)) { 2424 fnvlist_add_nvlist(spa->spa_load_info, 2425 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 2426 } 2427 2428 fnvlist_free(enabled_feat); 2429 fnvlist_free(unsup_feat); 2430 2431 if (!missing_feat_read) { 2432 fnvlist_add_boolean(spa->spa_load_info, 2433 ZPOOL_CONFIG_CAN_RDONLY); 2434 } 2435 2436 /* 2437 * If the state is SPA_LOAD_TRYIMPORT, our objective is 2438 * twofold: to determine whether the pool is available for 2439 * import in read-write mode and (if it is not) whether the 2440 * pool is available for import in read-only mode. If the pool 2441 * is available for import in read-write mode, it is displayed 2442 * as available in userland; if it is not available for import 2443 * in read-only mode, it is displayed as unavailable in 2444 * userland. If the pool is available for import in read-only 2445 * mode but not read-write mode, it is displayed as unavailable 2446 * in userland with a special note that the pool is actually 2447 * available for open in read-only mode. 2448 * 2449 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 2450 * missing a feature for write, we must first determine whether 2451 * the pool can be opened read-only before returning to 2452 * userland in order to know whether to display the 2453 * abovementioned note. 2454 */ 2455 if (missing_feat_read || (missing_feat_write && 2456 spa_writeable(spa))) { 2457 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2458 ENOTSUP)); 2459 } 2460 2461 /* 2462 * Load refcounts for ZFS features from disk into an in-memory 2463 * cache during SPA initialization. 2464 */ 2465 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 2466 uint64_t refcount; 2467 2468 error = feature_get_refcount_from_disk(spa, 2469 &spa_feature_table[i], &refcount); 2470 if (error == 0) { 2471 spa->spa_feat_refcount_cache[i] = refcount; 2472 } else if (error == ENOTSUP) { 2473 spa->spa_feat_refcount_cache[i] = 2474 SPA_FEATURE_DISABLED; 2475 } else { 2476 return (spa_vdev_err(rvd, 2477 VDEV_AUX_CORRUPT_DATA, EIO)); 2478 } 2479 } 2480 } 2481 2482 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { 2483 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, 2484 &spa->spa_feat_enabled_txg_obj) != 0) 2485 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2486 } 2487 2488 spa->spa_is_initializing = B_TRUE; 2489 error = dsl_pool_open(spa->spa_dsl_pool); 2490 spa->spa_is_initializing = B_FALSE; 2491 if (error != 0) 2492 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2493 2494 if (!mosconfig) { 2495 uint64_t hostid; 2496 nvlist_t *policy = NULL, *nvconfig; 2497 2498 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2499 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2500 2501 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, 2502 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2503 char *hostname; 2504 unsigned long myhostid = 0; 2505 2506 VERIFY(nvlist_lookup_string(nvconfig, 2507 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); 2508 2509#ifdef _KERNEL 2510 myhostid = zone_get_hostid(NULL); 2511#else /* _KERNEL */ 2512 /* 2513 * We're emulating the system's hostid in userland, so 2514 * we can't use zone_get_hostid(). 2515 */ 2516 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); 2517#endif /* _KERNEL */ 2518 if (check_hostid && hostid != 0 && myhostid != 0 && 2519 hostid != myhostid) { 2520 nvlist_free(nvconfig); 2521 cmn_err(CE_WARN, "pool '%s' could not be " 2522 "loaded as it was last accessed by " 2523 "another system (host: %s hostid: 0x%lx). " 2524 "See: http://illumos.org/msg/ZFS-8000-EY", 2525 spa_name(spa), hostname, 2526 (unsigned long)hostid); 2527 return (SET_ERROR(EBADF)); 2528 } 2529 } 2530 if (nvlist_lookup_nvlist(spa->spa_config, 2531 ZPOOL_REWIND_POLICY, &policy) == 0) 2532 VERIFY(nvlist_add_nvlist(nvconfig, 2533 ZPOOL_REWIND_POLICY, policy) == 0); 2534 2535 spa_config_set(spa, nvconfig); 2536 spa_unload(spa); 2537 spa_deactivate(spa); 2538 spa_activate(spa, orig_mode); 2539 2540 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); 2541 } 2542 2543 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) 2544 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2545 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 2546 if (error != 0) 2547 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2548 2549 /* 2550 * Load the bit that tells us to use the new accounting function 2551 * (raid-z deflation). If we have an older pool, this will not 2552 * be present. 2553 */ 2554 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); 2555 if (error != 0 && error != ENOENT) 2556 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2557 2558 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 2559 &spa->spa_creation_version); 2560 if (error != 0 && error != ENOENT) 2561 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2562 2563 /* 2564 * Load the persistent error log. If we have an older pool, this will 2565 * not be present. 2566 */ 2567 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); 2568 if (error != 0 && error != ENOENT) 2569 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2570 2571 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 2572 &spa->spa_errlog_scrub); 2573 if (error != 0 && error != ENOENT) 2574 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2575 2576 /* 2577 * Load the history object. If we have an older pool, this 2578 * will not be present. 2579 */ 2580 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); 2581 if (error != 0 && error != ENOENT) 2582 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2583 2584 /* 2585 * If we're assembling the pool from the split-off vdevs of 2586 * an existing pool, we don't want to attach the spares & cache 2587 * devices. 2588 */ 2589 2590 /* 2591 * Load any hot spares for this pool. 2592 */ 2593 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); 2594 if (error != 0 && error != ENOENT) 2595 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2596 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2597 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 2598 if (load_nvlist(spa, spa->spa_spares.sav_object, 2599 &spa->spa_spares.sav_config) != 0) 2600 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2601 2602 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2603 spa_load_spares(spa); 2604 spa_config_exit(spa, SCL_ALL, FTAG); 2605 } else if (error == 0) { 2606 spa->spa_spares.sav_sync = B_TRUE; 2607 } 2608 2609 /* 2610 * Load any level 2 ARC devices for this pool. 2611 */ 2612 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 2613 &spa->spa_l2cache.sav_object); 2614 if (error != 0 && error != ENOENT) 2615 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2616 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2617 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 2618 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 2619 &spa->spa_l2cache.sav_config) != 0) 2620 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2621 2622 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2623 spa_load_l2cache(spa); 2624 spa_config_exit(spa, SCL_ALL, FTAG); 2625 } else if (error == 0) { 2626 spa->spa_l2cache.sav_sync = B_TRUE; 2627 } 2628 2629 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 2630 2631 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); 2632 if (error && error != ENOENT) 2633 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2634 2635 if (error == 0) { 2636 uint64_t autoreplace; 2637 2638 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 2639 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 2640 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 2641 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 2642 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 2643 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 2644 &spa->spa_dedup_ditto); 2645 2646 spa->spa_autoreplace = (autoreplace != 0); 2647 } 2648 2649 /* 2650 * If the 'autoreplace' property is set, then post a resource notifying 2651 * the ZFS DE that it should not issue any faults for unopenable 2652 * devices. We also iterate over the vdevs, and post a sysevent for any 2653 * unopenable vdevs so that the normal autoreplace handler can take 2654 * over. 2655 */ 2656 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { 2657 spa_check_removed(spa->spa_root_vdev); 2658 /* 2659 * For the import case, this is done in spa_import(), because 2660 * at this point we're using the spare definitions from 2661 * the MOS config, not necessarily from the userland config. 2662 */ 2663 if (state != SPA_LOAD_IMPORT) { 2664 spa_aux_check_removed(&spa->spa_spares); 2665 spa_aux_check_removed(&spa->spa_l2cache); 2666 } 2667 } 2668 2669 /* 2670 * Load the vdev state for all toplevel vdevs. 2671 */ 2672 vdev_load(rvd); 2673 2674 /* 2675 * Propagate the leaf DTLs we just loaded all the way up the tree. 2676 */ 2677 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2678 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 2679 spa_config_exit(spa, SCL_ALL, FTAG); 2680 2681 /* 2682 * Load the DDTs (dedup tables). 2683 */ 2684 error = ddt_load(spa); 2685 if (error != 0) 2686 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2687 2688 spa_update_dspace(spa); 2689 2690 /* 2691 * Validate the config, using the MOS config to fill in any 2692 * information which might be missing. If we fail to validate 2693 * the config then declare the pool unfit for use. If we're 2694 * assembling a pool from a split, the log is not transferred 2695 * over. 2696 */ 2697 if (type != SPA_IMPORT_ASSEMBLE) { 2698 nvlist_t *nvconfig; 2699 2700 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2701 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2702 2703 if (!spa_config_valid(spa, nvconfig)) { 2704 nvlist_free(nvconfig); 2705 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 2706 ENXIO)); 2707 } 2708 nvlist_free(nvconfig); 2709 2710 /* 2711 * Now that we've validated the config, check the state of the 2712 * root vdev. If it can't be opened, it indicates one or 2713 * more toplevel vdevs are faulted. 2714 */ 2715 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2716 return (SET_ERROR(ENXIO)); 2717 2718 if (spa_check_logs(spa)) { 2719 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 2720 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); 2721 } 2722 } 2723 2724 if (missing_feat_write) { 2725 ASSERT(state == SPA_LOAD_TRYIMPORT); 2726 2727 /* 2728 * At this point, we know that we can open the pool in 2729 * read-only mode but not read-write mode. We now have enough 2730 * information and can return to userland. 2731 */ 2732 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); 2733 } 2734 2735 /* 2736 * We've successfully opened the pool, verify that we're ready 2737 * to start pushing transactions. 2738 */ 2739 if (state != SPA_LOAD_TRYIMPORT) { 2740 if (error = spa_load_verify(spa)) 2741 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2742 error)); 2743 } 2744 2745 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || 2746 spa->spa_load_max_txg == UINT64_MAX)) { 2747 dmu_tx_t *tx; 2748 int need_update = B_FALSE; 2749 2750 ASSERT(state != SPA_LOAD_TRYIMPORT); 2751 2752 /* 2753 * Claim log blocks that haven't been committed yet. 2754 * This must all happen in a single txg. 2755 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 2756 * invoked from zil_claim_log_block()'s i/o done callback. 2757 * Price of rollback is that we abandon the log. 2758 */ 2759 spa->spa_claiming = B_TRUE; 2760 2761 tx = dmu_tx_create_assigned(spa_get_dsl(spa), 2762 spa_first_txg(spa)); 2763 (void) dmu_objset_find(spa_name(spa), 2764 zil_claim, tx, DS_FIND_CHILDREN); 2765 dmu_tx_commit(tx); 2766 2767 spa->spa_claiming = B_FALSE; 2768 2769 spa_set_log_state(spa, SPA_LOG_GOOD); 2770 spa->spa_sync_on = B_TRUE; 2771 txg_sync_start(spa->spa_dsl_pool); 2772 2773 /* 2774 * Wait for all claims to sync. We sync up to the highest 2775 * claimed log block birth time so that claimed log blocks 2776 * don't appear to be from the future. spa_claim_max_txg 2777 * will have been set for us by either zil_check_log_chain() 2778 * (invoked from spa_check_logs()) or zil_claim() above. 2779 */ 2780 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 2781 2782 /* 2783 * If the config cache is stale, or we have uninitialized 2784 * metaslabs (see spa_vdev_add()), then update the config. 2785 * 2786 * If this is a verbatim import, trust the current 2787 * in-core spa_config and update the disk labels. 2788 */ 2789 if (config_cache_txg != spa->spa_config_txg || 2790 state == SPA_LOAD_IMPORT || 2791 state == SPA_LOAD_RECOVER || 2792 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 2793 need_update = B_TRUE; 2794 2795 for (int c = 0; c < rvd->vdev_children; c++) 2796 if (rvd->vdev_child[c]->vdev_ms_array == 0) 2797 need_update = B_TRUE; 2798 2799 /* 2800 * Update the config cache asychronously in case we're the 2801 * root pool, in which case the config cache isn't writable yet. 2802 */ 2803 if (need_update) 2804 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2805 2806 /* 2807 * Check all DTLs to see if anything needs resilvering. 2808 */ 2809 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 2810 vdev_resilver_needed(rvd, NULL, NULL)) 2811 spa_async_request(spa, SPA_ASYNC_RESILVER); 2812 2813 /* 2814 * Log the fact that we booted up (so that we can detect if 2815 * we rebooted in the middle of an operation). 2816 */ 2817 spa_history_log_version(spa, "open"); 2818 2819 /* 2820 * Delete any inconsistent datasets. 2821 */ 2822 (void) dmu_objset_find(spa_name(spa), 2823 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 2824 2825 /* 2826 * Clean up any stale temporary dataset userrefs. 2827 */ 2828 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 2829 } 2830 2831 return (0); 2832} 2833 2834static int 2835spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) 2836{ 2837 int mode = spa->spa_mode; 2838 2839 spa_unload(spa); 2840 spa_deactivate(spa); 2841 2842 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg - 1; 2843 2844 spa_activate(spa, mode); 2845 spa_async_suspend(spa); 2846 2847 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); 2848} 2849 2850/* 2851 * If spa_load() fails this function will try loading prior txg's. If 2852 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 2853 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 2854 * function will not rewind the pool and will return the same error as 2855 * spa_load(). 2856 */ 2857static int 2858spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, 2859 uint64_t max_request, int rewind_flags) 2860{ 2861 nvlist_t *loadinfo = NULL; 2862 nvlist_t *config = NULL; 2863 int load_error, rewind_error; 2864 uint64_t safe_rewind_txg; 2865 uint64_t min_txg; 2866 2867 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 2868 spa->spa_load_max_txg = spa->spa_load_txg; 2869 spa_set_log_state(spa, SPA_LOG_CLEAR); 2870 } else { 2871 spa->spa_load_max_txg = max_request; 2872 if (max_request != UINT64_MAX) 2873 spa->spa_extreme_rewind = B_TRUE; 2874 } 2875 2876 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, 2877 mosconfig); 2878 if (load_error == 0) 2879 return (0); 2880 2881 if (spa->spa_root_vdev != NULL) 2882 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2883 2884 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 2885 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 2886 2887 if (rewind_flags & ZPOOL_NEVER_REWIND) { 2888 nvlist_free(config); 2889 return (load_error); 2890 } 2891 2892 if (state == SPA_LOAD_RECOVER) { 2893 /* Price of rolling back is discarding txgs, including log */ 2894 spa_set_log_state(spa, SPA_LOG_CLEAR); 2895 } else { 2896 /* 2897 * If we aren't rolling back save the load info from our first 2898 * import attempt so that we can restore it after attempting 2899 * to rewind. 2900 */ 2901 loadinfo = spa->spa_load_info; 2902 spa->spa_load_info = fnvlist_alloc(); 2903 } 2904 2905 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 2906 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 2907 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 2908 TXG_INITIAL : safe_rewind_txg; 2909 2910 /* 2911 * Continue as long as we're finding errors, we're still within 2912 * the acceptable rewind range, and we're still finding uberblocks 2913 */ 2914 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 2915 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 2916 if (spa->spa_load_max_txg < safe_rewind_txg) 2917 spa->spa_extreme_rewind = B_TRUE; 2918 rewind_error = spa_load_retry(spa, state, mosconfig); 2919 } 2920 2921 spa->spa_extreme_rewind = B_FALSE; 2922 spa->spa_load_max_txg = UINT64_MAX; 2923 2924 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 2925 spa_config_set(spa, config); 2926 2927 if (state == SPA_LOAD_RECOVER) { 2928 ASSERT3P(loadinfo, ==, NULL); 2929 return (rewind_error); 2930 } else { 2931 /* Store the rewind info as part of the initial load info */ 2932 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 2933 spa->spa_load_info); 2934 2935 /* Restore the initial load info */ 2936 fnvlist_free(spa->spa_load_info); 2937 spa->spa_load_info = loadinfo; 2938 2939 return (load_error); 2940 } 2941} 2942 2943/* 2944 * Pool Open/Import 2945 * 2946 * The import case is identical to an open except that the configuration is sent 2947 * down from userland, instead of grabbed from the configuration cache. For the 2948 * case of an open, the pool configuration will exist in the 2949 * POOL_STATE_UNINITIALIZED state. 2950 * 2951 * The stats information (gen/count/ustats) is used to gather vdev statistics at 2952 * the same time open the pool, without having to keep around the spa_t in some 2953 * ambiguous state. 2954 */ 2955static int 2956spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 2957 nvlist_t **config) 2958{ 2959 spa_t *spa; 2960 spa_load_state_t state = SPA_LOAD_OPEN; 2961 int error; 2962 int locked = B_FALSE; 2963 int firstopen = B_FALSE; 2964 2965 *spapp = NULL; 2966 2967 /* 2968 * As disgusting as this is, we need to support recursive calls to this 2969 * function because dsl_dir_open() is called during spa_load(), and ends 2970 * up calling spa_open() again. The real fix is to figure out how to 2971 * avoid dsl_dir_open() calling this in the first place. 2972 */ 2973 if (mutex_owner(&spa_namespace_lock) != curthread) { 2974 mutex_enter(&spa_namespace_lock); 2975 locked = B_TRUE; 2976 } 2977 2978 if ((spa = spa_lookup(pool)) == NULL) { 2979 if (locked) 2980 mutex_exit(&spa_namespace_lock); 2981 return (SET_ERROR(ENOENT)); 2982 } 2983 2984 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 2985 zpool_rewind_policy_t policy; 2986 2987 firstopen = B_TRUE; 2988 2989 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, 2990 &policy); 2991 if (policy.zrp_request & ZPOOL_DO_REWIND) 2992 state = SPA_LOAD_RECOVER; 2993 2994 spa_activate(spa, spa_mode_global); 2995 2996 if (state != SPA_LOAD_RECOVER) 2997 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 2998 2999 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, 3000 policy.zrp_request); 3001 3002 if (error == EBADF) { 3003 /* 3004 * If vdev_validate() returns failure (indicated by 3005 * EBADF), it indicates that one of the vdevs indicates 3006 * that the pool has been exported or destroyed. If 3007 * this is the case, the config cache is out of sync and 3008 * we should remove the pool from the namespace. 3009 */ 3010 spa_unload(spa); 3011 spa_deactivate(spa); 3012 spa_config_sync(spa, B_TRUE, B_TRUE); 3013 spa_remove(spa); 3014 if (locked) 3015 mutex_exit(&spa_namespace_lock); 3016 return (SET_ERROR(ENOENT)); 3017 } 3018 3019 if (error) { 3020 /* 3021 * We can't open the pool, but we still have useful 3022 * information: the state of each vdev after the 3023 * attempted vdev_open(). Return this to the user. 3024 */ 3025 if (config != NULL && spa->spa_config) { 3026 VERIFY(nvlist_dup(spa->spa_config, config, 3027 KM_SLEEP) == 0); 3028 VERIFY(nvlist_add_nvlist(*config, 3029 ZPOOL_CONFIG_LOAD_INFO, 3030 spa->spa_load_info) == 0); 3031 } 3032 spa_unload(spa); 3033 spa_deactivate(spa); 3034 spa->spa_last_open_failed = error; 3035 if (locked) 3036 mutex_exit(&spa_namespace_lock); 3037 *spapp = NULL; 3038 return (error); 3039 } 3040 } 3041 3042 spa_open_ref(spa, tag); 3043 3044 if (config != NULL) 3045 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 3046 3047 /* 3048 * If we've recovered the pool, pass back any information we 3049 * gathered while doing the load. 3050 */ 3051 if (state == SPA_LOAD_RECOVER) { 3052 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 3053 spa->spa_load_info) == 0); 3054 } 3055 3056 if (locked) { 3057 spa->spa_last_open_failed = 0; 3058 spa->spa_last_ubsync_txg = 0; 3059 spa->spa_load_txg = 0; 3060 mutex_exit(&spa_namespace_lock); 3061#ifdef __FreeBSD__ 3062#ifdef _KERNEL 3063 if (firstopen) 3064 zvol_create_minors(spa->spa_name); 3065#endif 3066#endif 3067 } 3068 3069 *spapp = spa; 3070 3071 return (0); 3072} 3073 3074int 3075spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 3076 nvlist_t **config) 3077{ 3078 return (spa_open_common(name, spapp, tag, policy, config)); 3079} 3080 3081int 3082spa_open(const char *name, spa_t **spapp, void *tag) 3083{ 3084 return (spa_open_common(name, spapp, tag, NULL, NULL)); 3085} 3086 3087/* 3088 * Lookup the given spa_t, incrementing the inject count in the process, 3089 * preventing it from being exported or destroyed. 3090 */ 3091spa_t * 3092spa_inject_addref(char *name) 3093{ 3094 spa_t *spa; 3095 3096 mutex_enter(&spa_namespace_lock); 3097 if ((spa = spa_lookup(name)) == NULL) { 3098 mutex_exit(&spa_namespace_lock); 3099 return (NULL); 3100 } 3101 spa->spa_inject_ref++; 3102 mutex_exit(&spa_namespace_lock); 3103 3104 return (spa); 3105} 3106 3107void 3108spa_inject_delref(spa_t *spa) 3109{ 3110 mutex_enter(&spa_namespace_lock); 3111 spa->spa_inject_ref--; 3112 mutex_exit(&spa_namespace_lock); 3113} 3114 3115/* 3116 * Add spares device information to the nvlist. 3117 */ 3118static void 3119spa_add_spares(spa_t *spa, nvlist_t *config) 3120{ 3121 nvlist_t **spares; 3122 uint_t i, nspares; 3123 nvlist_t *nvroot; 3124 uint64_t guid; 3125 vdev_stat_t *vs; 3126 uint_t vsc; 3127 uint64_t pool; 3128 3129 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3130 3131 if (spa->spa_spares.sav_count == 0) 3132 return; 3133 3134 VERIFY(nvlist_lookup_nvlist(config, 3135 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3136 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 3137 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3138 if (nspares != 0) { 3139 VERIFY(nvlist_add_nvlist_array(nvroot, 3140 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3141 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3142 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3143 3144 /* 3145 * Go through and find any spares which have since been 3146 * repurposed as an active spare. If this is the case, update 3147 * their status appropriately. 3148 */ 3149 for (i = 0; i < nspares; i++) { 3150 VERIFY(nvlist_lookup_uint64(spares[i], 3151 ZPOOL_CONFIG_GUID, &guid) == 0); 3152 if (spa_spare_exists(guid, &pool, NULL) && 3153 pool != 0ULL) { 3154 VERIFY(nvlist_lookup_uint64_array( 3155 spares[i], ZPOOL_CONFIG_VDEV_STATS, 3156 (uint64_t **)&vs, &vsc) == 0); 3157 vs->vs_state = VDEV_STATE_CANT_OPEN; 3158 vs->vs_aux = VDEV_AUX_SPARED; 3159 } 3160 } 3161 } 3162} 3163 3164/* 3165 * Add l2cache device information to the nvlist, including vdev stats. 3166 */ 3167static void 3168spa_add_l2cache(spa_t *spa, nvlist_t *config) 3169{ 3170 nvlist_t **l2cache; 3171 uint_t i, j, nl2cache; 3172 nvlist_t *nvroot; 3173 uint64_t guid; 3174 vdev_t *vd; 3175 vdev_stat_t *vs; 3176 uint_t vsc; 3177 3178 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3179 3180 if (spa->spa_l2cache.sav_count == 0) 3181 return; 3182 3183 VERIFY(nvlist_lookup_nvlist(config, 3184 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3185 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 3186 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3187 if (nl2cache != 0) { 3188 VERIFY(nvlist_add_nvlist_array(nvroot, 3189 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3190 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3191 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3192 3193 /* 3194 * Update level 2 cache device stats. 3195 */ 3196 3197 for (i = 0; i < nl2cache; i++) { 3198 VERIFY(nvlist_lookup_uint64(l2cache[i], 3199 ZPOOL_CONFIG_GUID, &guid) == 0); 3200 3201 vd = NULL; 3202 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 3203 if (guid == 3204 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 3205 vd = spa->spa_l2cache.sav_vdevs[j]; 3206 break; 3207 } 3208 } 3209 ASSERT(vd != NULL); 3210 3211 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 3212 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 3213 == 0); 3214 vdev_get_stats(vd, vs); 3215 } 3216 } 3217} 3218 3219static void 3220spa_add_feature_stats(spa_t *spa, nvlist_t *config) 3221{ 3222 nvlist_t *features; 3223 zap_cursor_t zc; 3224 zap_attribute_t za; 3225 3226 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3227 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3228 3229 /* We may be unable to read features if pool is suspended. */ 3230 if (spa_suspended(spa)) 3231 goto out; 3232 3233 if (spa->spa_feat_for_read_obj != 0) { 3234 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3235 spa->spa_feat_for_read_obj); 3236 zap_cursor_retrieve(&zc, &za) == 0; 3237 zap_cursor_advance(&zc)) { 3238 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3239 za.za_num_integers == 1); 3240 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3241 za.za_first_integer)); 3242 } 3243 zap_cursor_fini(&zc); 3244 } 3245 3246 if (spa->spa_feat_for_write_obj != 0) { 3247 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3248 spa->spa_feat_for_write_obj); 3249 zap_cursor_retrieve(&zc, &za) == 0; 3250 zap_cursor_advance(&zc)) { 3251 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3252 za.za_num_integers == 1); 3253 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3254 za.za_first_integer)); 3255 } 3256 zap_cursor_fini(&zc); 3257 } 3258 3259out: 3260 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 3261 features) == 0); 3262 nvlist_free(features); 3263} 3264 3265int 3266spa_get_stats(const char *name, nvlist_t **config, 3267 char *altroot, size_t buflen) 3268{ 3269 int error; 3270 spa_t *spa; 3271 3272 *config = NULL; 3273 error = spa_open_common(name, &spa, FTAG, NULL, config); 3274 3275 if (spa != NULL) { 3276 /* 3277 * This still leaves a window of inconsistency where the spares 3278 * or l2cache devices could change and the config would be 3279 * self-inconsistent. 3280 */ 3281 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3282 3283 if (*config != NULL) { 3284 uint64_t loadtimes[2]; 3285 3286 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 3287 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 3288 VERIFY(nvlist_add_uint64_array(*config, 3289 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 3290 3291 VERIFY(nvlist_add_uint64(*config, 3292 ZPOOL_CONFIG_ERRCOUNT, 3293 spa_get_errlog_size(spa)) == 0); 3294 3295 if (spa_suspended(spa)) 3296 VERIFY(nvlist_add_uint64(*config, 3297 ZPOOL_CONFIG_SUSPENDED, 3298 spa->spa_failmode) == 0); 3299 3300 spa_add_spares(spa, *config); 3301 spa_add_l2cache(spa, *config); 3302 spa_add_feature_stats(spa, *config); 3303 } 3304 } 3305 3306 /* 3307 * We want to get the alternate root even for faulted pools, so we cheat 3308 * and call spa_lookup() directly. 3309 */ 3310 if (altroot) { 3311 if (spa == NULL) { 3312 mutex_enter(&spa_namespace_lock); 3313 spa = spa_lookup(name); 3314 if (spa) 3315 spa_altroot(spa, altroot, buflen); 3316 else 3317 altroot[0] = '\0'; 3318 spa = NULL; 3319 mutex_exit(&spa_namespace_lock); 3320 } else { 3321 spa_altroot(spa, altroot, buflen); 3322 } 3323 } 3324 3325 if (spa != NULL) { 3326 spa_config_exit(spa, SCL_CONFIG, FTAG); 3327 spa_close(spa, FTAG); 3328 } 3329 3330 return (error); 3331} 3332 3333/* 3334 * Validate that the auxiliary device array is well formed. We must have an 3335 * array of nvlists, each which describes a valid leaf vdev. If this is an 3336 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 3337 * specified, as long as they are well-formed. 3338 */ 3339static int 3340spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 3341 spa_aux_vdev_t *sav, const char *config, uint64_t version, 3342 vdev_labeltype_t label) 3343{ 3344 nvlist_t **dev; 3345 uint_t i, ndev; 3346 vdev_t *vd; 3347 int error; 3348 3349 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3350 3351 /* 3352 * It's acceptable to have no devs specified. 3353 */ 3354 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 3355 return (0); 3356 3357 if (ndev == 0) 3358 return (SET_ERROR(EINVAL)); 3359 3360 /* 3361 * Make sure the pool is formatted with a version that supports this 3362 * device type. 3363 */ 3364 if (spa_version(spa) < version) 3365 return (SET_ERROR(ENOTSUP)); 3366 3367 /* 3368 * Set the pending device list so we correctly handle device in-use 3369 * checking. 3370 */ 3371 sav->sav_pending = dev; 3372 sav->sav_npending = ndev; 3373 3374 for (i = 0; i < ndev; i++) { 3375 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 3376 mode)) != 0) 3377 goto out; 3378 3379 if (!vd->vdev_ops->vdev_op_leaf) { 3380 vdev_free(vd); 3381 error = SET_ERROR(EINVAL); 3382 goto out; 3383 } 3384 3385 /* 3386 * The L2ARC currently only supports disk devices in 3387 * kernel context. For user-level testing, we allow it. 3388 */ 3389#ifdef _KERNEL 3390 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && 3391 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { 3392 error = SET_ERROR(ENOTBLK); 3393 vdev_free(vd); 3394 goto out; 3395 } 3396#endif 3397 vd->vdev_top = vd; 3398 3399 if ((error = vdev_open(vd)) == 0 && 3400 (error = vdev_label_init(vd, crtxg, label)) == 0) { 3401 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 3402 vd->vdev_guid) == 0); 3403 } 3404 3405 vdev_free(vd); 3406 3407 if (error && 3408 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 3409 goto out; 3410 else 3411 error = 0; 3412 } 3413 3414out: 3415 sav->sav_pending = NULL; 3416 sav->sav_npending = 0; 3417 return (error); 3418} 3419 3420static int 3421spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 3422{ 3423 int error; 3424 3425 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3426 3427 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3428 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 3429 VDEV_LABEL_SPARE)) != 0) { 3430 return (error); 3431 } 3432 3433 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3434 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 3435 VDEV_LABEL_L2CACHE)); 3436} 3437 3438static void 3439spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 3440 const char *config) 3441{ 3442 int i; 3443 3444 if (sav->sav_config != NULL) { 3445 nvlist_t **olddevs; 3446 uint_t oldndevs; 3447 nvlist_t **newdevs; 3448 3449 /* 3450 * Generate new dev list by concatentating with the 3451 * current dev list. 3452 */ 3453 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 3454 &olddevs, &oldndevs) == 0); 3455 3456 newdevs = kmem_alloc(sizeof (void *) * 3457 (ndevs + oldndevs), KM_SLEEP); 3458 for (i = 0; i < oldndevs; i++) 3459 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 3460 KM_SLEEP) == 0); 3461 for (i = 0; i < ndevs; i++) 3462 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 3463 KM_SLEEP) == 0); 3464 3465 VERIFY(nvlist_remove(sav->sav_config, config, 3466 DATA_TYPE_NVLIST_ARRAY) == 0); 3467 3468 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 3469 config, newdevs, ndevs + oldndevs) == 0); 3470 for (i = 0; i < oldndevs + ndevs; i++) 3471 nvlist_free(newdevs[i]); 3472 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 3473 } else { 3474 /* 3475 * Generate a new dev list. 3476 */ 3477 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 3478 KM_SLEEP) == 0); 3479 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 3480 devs, ndevs) == 0); 3481 } 3482} 3483 3484/* 3485 * Stop and drop level 2 ARC devices 3486 */ 3487void 3488spa_l2cache_drop(spa_t *spa) 3489{ 3490 vdev_t *vd; 3491 int i; 3492 spa_aux_vdev_t *sav = &spa->spa_l2cache; 3493 3494 for (i = 0; i < sav->sav_count; i++) { 3495 uint64_t pool; 3496 3497 vd = sav->sav_vdevs[i]; 3498 ASSERT(vd != NULL); 3499 3500 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 3501 pool != 0ULL && l2arc_vdev_present(vd)) 3502 l2arc_remove_vdev(vd); 3503 } 3504} 3505 3506/* 3507 * Pool Creation 3508 */ 3509int 3510spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 3511 nvlist_t *zplprops) 3512{ 3513 spa_t *spa; 3514 char *altroot = NULL; 3515 vdev_t *rvd; 3516 dsl_pool_t *dp; 3517 dmu_tx_t *tx; 3518 int error = 0; 3519 uint64_t txg = TXG_INITIAL; 3520 nvlist_t **spares, **l2cache; 3521 uint_t nspares, nl2cache; 3522 uint64_t version, obj; 3523 boolean_t has_features; 3524 3525 /* 3526 * If this pool already exists, return failure. 3527 */ 3528 mutex_enter(&spa_namespace_lock); 3529 if (spa_lookup(pool) != NULL) { 3530 mutex_exit(&spa_namespace_lock); 3531 return (SET_ERROR(EEXIST)); 3532 } 3533 3534 /* 3535 * Allocate a new spa_t structure. 3536 */ 3537 (void) nvlist_lookup_string(props, 3538 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3539 spa = spa_add(pool, NULL, altroot); 3540 spa_activate(spa, spa_mode_global); 3541 3542 if (props && (error = spa_prop_validate(spa, props))) { 3543 spa_deactivate(spa); 3544 spa_remove(spa); 3545 mutex_exit(&spa_namespace_lock); 3546 return (error); 3547 } 3548 3549 has_features = B_FALSE; 3550 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 3551 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 3552 if (zpool_prop_feature(nvpair_name(elem))) 3553 has_features = B_TRUE; 3554 } 3555 3556 if (has_features || nvlist_lookup_uint64(props, 3557 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 3558 version = SPA_VERSION; 3559 } 3560 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 3561 3562 spa->spa_first_txg = txg; 3563 spa->spa_uberblock.ub_txg = txg - 1; 3564 spa->spa_uberblock.ub_version = version; 3565 spa->spa_ubsync = spa->spa_uberblock; 3566 3567 /* 3568 * Create "The Godfather" zio to hold all async IOs 3569 */ 3570 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 3571 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 3572 3573 /* 3574 * Create the root vdev. 3575 */ 3576 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3577 3578 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 3579 3580 ASSERT(error != 0 || rvd != NULL); 3581 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 3582 3583 if (error == 0 && !zfs_allocatable_devs(nvroot)) 3584 error = SET_ERROR(EINVAL); 3585 3586 if (error == 0 && 3587 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 3588 (error = spa_validate_aux(spa, nvroot, txg, 3589 VDEV_ALLOC_ADD)) == 0) { 3590 for (int c = 0; c < rvd->vdev_children; c++) { 3591 vdev_ashift_optimize(rvd->vdev_child[c]); 3592 vdev_metaslab_set_size(rvd->vdev_child[c]); 3593 vdev_expand(rvd->vdev_child[c], txg); 3594 } 3595 } 3596 3597 spa_config_exit(spa, SCL_ALL, FTAG); 3598 3599 if (error != 0) { 3600 spa_unload(spa); 3601 spa_deactivate(spa); 3602 spa_remove(spa); 3603 mutex_exit(&spa_namespace_lock); 3604 return (error); 3605 } 3606 3607 /* 3608 * Get the list of spares, if specified. 3609 */ 3610 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3611 &spares, &nspares) == 0) { 3612 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 3613 KM_SLEEP) == 0); 3614 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3615 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3616 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3617 spa_load_spares(spa); 3618 spa_config_exit(spa, SCL_ALL, FTAG); 3619 spa->spa_spares.sav_sync = B_TRUE; 3620 } 3621 3622 /* 3623 * Get the list of level 2 cache devices, if specified. 3624 */ 3625 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3626 &l2cache, &nl2cache) == 0) { 3627 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3628 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3629 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3630 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3631 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3632 spa_load_l2cache(spa); 3633 spa_config_exit(spa, SCL_ALL, FTAG); 3634 spa->spa_l2cache.sav_sync = B_TRUE; 3635 } 3636 3637 spa->spa_is_initializing = B_TRUE; 3638 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); 3639 spa->spa_meta_objset = dp->dp_meta_objset; 3640 spa->spa_is_initializing = B_FALSE; 3641 3642 /* 3643 * Create DDTs (dedup tables). 3644 */ 3645 ddt_create(spa); 3646 3647 spa_update_dspace(spa); 3648 3649 tx = dmu_tx_create_assigned(dp, txg); 3650 3651 /* 3652 * Create the pool config object. 3653 */ 3654 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 3655 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 3656 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 3657 3658 if (zap_add(spa->spa_meta_objset, 3659 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 3660 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 3661 cmn_err(CE_PANIC, "failed to add pool config"); 3662 } 3663 3664 if (spa_version(spa) >= SPA_VERSION_FEATURES) 3665 spa_feature_create_zap_objects(spa, tx); 3666 3667 if (zap_add(spa->spa_meta_objset, 3668 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 3669 sizeof (uint64_t), 1, &version, tx) != 0) { 3670 cmn_err(CE_PANIC, "failed to add pool version"); 3671 } 3672 3673 /* Newly created pools with the right version are always deflated. */ 3674 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 3675 spa->spa_deflate = TRUE; 3676 if (zap_add(spa->spa_meta_objset, 3677 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 3678 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 3679 cmn_err(CE_PANIC, "failed to add deflate"); 3680 } 3681 } 3682 3683 /* 3684 * Create the deferred-free bpobj. Turn off compression 3685 * because sync-to-convergence takes longer if the blocksize 3686 * keeps changing. 3687 */ 3688 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 3689 dmu_object_set_compress(spa->spa_meta_objset, obj, 3690 ZIO_COMPRESS_OFF, tx); 3691 if (zap_add(spa->spa_meta_objset, 3692 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 3693 sizeof (uint64_t), 1, &obj, tx) != 0) { 3694 cmn_err(CE_PANIC, "failed to add bpobj"); 3695 } 3696 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 3697 spa->spa_meta_objset, obj)); 3698 3699 /* 3700 * Create the pool's history object. 3701 */ 3702 if (version >= SPA_VERSION_ZPOOL_HISTORY) 3703 spa_history_create_obj(spa, tx); 3704 3705 /* 3706 * Set pool properties. 3707 */ 3708 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 3709 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3710 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 3711 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 3712 3713 if (props != NULL) { 3714 spa_configfile_set(spa, props, B_FALSE); 3715 spa_sync_props(props, tx); 3716 } 3717 3718 dmu_tx_commit(tx); 3719 3720 spa->spa_sync_on = B_TRUE; 3721 txg_sync_start(spa->spa_dsl_pool); 3722 3723 /* 3724 * We explicitly wait for the first transaction to complete so that our 3725 * bean counters are appropriately updated. 3726 */ 3727 txg_wait_synced(spa->spa_dsl_pool, txg); 3728 3729 spa_config_sync(spa, B_FALSE, B_TRUE); 3730 3731 spa_history_log_version(spa, "create"); 3732 3733 spa->spa_minref = refcount_count(&spa->spa_refcount); 3734 3735 mutex_exit(&spa_namespace_lock); 3736 3737 return (0); 3738} 3739 3740#ifdef _KERNEL 3741#if defined(sun) 3742/* 3743 * Get the root pool information from the root disk, then import the root pool 3744 * during the system boot up time. 3745 */ 3746extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 3747 3748static nvlist_t * 3749spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 3750{ 3751 nvlist_t *config; 3752 nvlist_t *nvtop, *nvroot; 3753 uint64_t pgid; 3754 3755 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 3756 return (NULL); 3757 3758 /* 3759 * Add this top-level vdev to the child array. 3760 */ 3761 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3762 &nvtop) == 0); 3763 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3764 &pgid) == 0); 3765 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 3766 3767 /* 3768 * Put this pool's top-level vdevs into a root vdev. 3769 */ 3770 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3771 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3772 VDEV_TYPE_ROOT) == 0); 3773 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3774 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3775 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3776 &nvtop, 1) == 0); 3777 3778 /* 3779 * Replace the existing vdev_tree with the new root vdev in 3780 * this pool's configuration (remove the old, add the new). 3781 */ 3782 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3783 nvlist_free(nvroot); 3784 return (config); 3785} 3786 3787/* 3788 * Walk the vdev tree and see if we can find a device with "better" 3789 * configuration. A configuration is "better" if the label on that 3790 * device has a more recent txg. 3791 */ 3792static void 3793spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 3794{ 3795 for (int c = 0; c < vd->vdev_children; c++) 3796 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 3797 3798 if (vd->vdev_ops->vdev_op_leaf) { 3799 nvlist_t *label; 3800 uint64_t label_txg; 3801 3802 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 3803 &label) != 0) 3804 return; 3805 3806 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 3807 &label_txg) == 0); 3808 3809 /* 3810 * Do we have a better boot device? 3811 */ 3812 if (label_txg > *txg) { 3813 *txg = label_txg; 3814 *avd = vd; 3815 } 3816 nvlist_free(label); 3817 } 3818} 3819 3820/* 3821 * Import a root pool. 3822 * 3823 * For x86. devpath_list will consist of devid and/or physpath name of 3824 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 3825 * The GRUB "findroot" command will return the vdev we should boot. 3826 * 3827 * For Sparc, devpath_list consists the physpath name of the booting device 3828 * no matter the rootpool is a single device pool or a mirrored pool. 3829 * e.g. 3830 * "/pci@1f,0/ide@d/disk@0,0:a" 3831 */ 3832int 3833spa_import_rootpool(char *devpath, char *devid) 3834{ 3835 spa_t *spa; 3836 vdev_t *rvd, *bvd, *avd = NULL; 3837 nvlist_t *config, *nvtop; 3838 uint64_t guid, txg; 3839 char *pname; 3840 int error; 3841 3842 /* 3843 * Read the label from the boot device and generate a configuration. 3844 */ 3845 config = spa_generate_rootconf(devpath, devid, &guid); 3846#if defined(_OBP) && defined(_KERNEL) 3847 if (config == NULL) { 3848 if (strstr(devpath, "/iscsi/ssd") != NULL) { 3849 /* iscsi boot */ 3850 get_iscsi_bootpath_phy(devpath); 3851 config = spa_generate_rootconf(devpath, devid, &guid); 3852 } 3853 } 3854#endif 3855 if (config == NULL) { 3856 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 3857 devpath); 3858 return (SET_ERROR(EIO)); 3859 } 3860 3861 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 3862 &pname) == 0); 3863 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 3864 3865 mutex_enter(&spa_namespace_lock); 3866 if ((spa = spa_lookup(pname)) != NULL) { 3867 /* 3868 * Remove the existing root pool from the namespace so that we 3869 * can replace it with the correct config we just read in. 3870 */ 3871 spa_remove(spa); 3872 } 3873 3874 spa = spa_add(pname, config, NULL); 3875 spa->spa_is_root = B_TRUE; 3876 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 3877 3878 /* 3879 * Build up a vdev tree based on the boot device's label config. 3880 */ 3881 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3882 &nvtop) == 0); 3883 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3884 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 3885 VDEV_ALLOC_ROOTPOOL); 3886 spa_config_exit(spa, SCL_ALL, FTAG); 3887 if (error) { 3888 mutex_exit(&spa_namespace_lock); 3889 nvlist_free(config); 3890 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 3891 pname); 3892 return (error); 3893 } 3894 3895 /* 3896 * Get the boot vdev. 3897 */ 3898 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 3899 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 3900 (u_longlong_t)guid); 3901 error = SET_ERROR(ENOENT); 3902 goto out; 3903 } 3904 3905 /* 3906 * Determine if there is a better boot device. 3907 */ 3908 avd = bvd; 3909 spa_alt_rootvdev(rvd, &avd, &txg); 3910 if (avd != bvd) { 3911 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 3912 "try booting from '%s'", avd->vdev_path); 3913 error = SET_ERROR(EINVAL); 3914 goto out; 3915 } 3916 3917 /* 3918 * If the boot device is part of a spare vdev then ensure that 3919 * we're booting off the active spare. 3920 */ 3921 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 3922 !bvd->vdev_isspare) { 3923 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 3924 "try booting from '%s'", 3925 bvd->vdev_parent-> 3926 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 3927 error = SET_ERROR(EINVAL); 3928 goto out; 3929 } 3930 3931 error = 0; 3932out: 3933 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3934 vdev_free(rvd); 3935 spa_config_exit(spa, SCL_ALL, FTAG); 3936 mutex_exit(&spa_namespace_lock); 3937 3938 nvlist_free(config); 3939 return (error); 3940} 3941 3942#else 3943 3944extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs, 3945 uint64_t *count); 3946 3947static nvlist_t * 3948spa_generate_rootconf(const char *name) 3949{ 3950 nvlist_t **configs, **tops; 3951 nvlist_t *config; 3952 nvlist_t *best_cfg, *nvtop, *nvroot; 3953 uint64_t *holes; 3954 uint64_t best_txg; 3955 uint64_t nchildren; 3956 uint64_t pgid; 3957 uint64_t count; 3958 uint64_t i; 3959 uint_t nholes; 3960 3961 if (vdev_geom_read_pool_label(name, &configs, &count) != 0) 3962 return (NULL); 3963 3964 ASSERT3U(count, !=, 0); 3965 best_txg = 0; 3966 for (i = 0; i < count; i++) { 3967 uint64_t txg; 3968 3969 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG, 3970 &txg) == 0); 3971 if (txg > best_txg) { 3972 best_txg = txg; 3973 best_cfg = configs[i]; 3974 } 3975 } 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