spa.c revision 263390
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2013 by Delphix. All rights reserved. 25 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 26 * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 27 */ 28 29/* 30 * SPA: Storage Pool Allocator 31 * 32 * This file contains all the routines used when modifying on-disk SPA state. 33 * This includes opening, importing, destroying, exporting a pool, and syncing a 34 * pool. 35 */ 36 37#include <sys/zfs_context.h> 38#include <sys/fm/fs/zfs.h> 39#include <sys/spa_impl.h> 40#include <sys/zio.h> 41#include <sys/zio_checksum.h> 42#include <sys/dmu.h> 43#include <sys/dmu_tx.h> 44#include <sys/zap.h> 45#include <sys/zil.h> 46#include <sys/ddt.h> 47#include <sys/vdev_impl.h> 48#include <sys/metaslab.h> 49#include <sys/metaslab_impl.h> 50#include <sys/uberblock_impl.h> 51#include <sys/txg.h> 52#include <sys/avl.h> 53#include <sys/dmu_traverse.h> 54#include <sys/dmu_objset.h> 55#include <sys/unique.h> 56#include <sys/dsl_pool.h> 57#include <sys/dsl_dataset.h> 58#include <sys/dsl_dir.h> 59#include <sys/dsl_prop.h> 60#include <sys/dsl_synctask.h> 61#include <sys/fs/zfs.h> 62#include <sys/arc.h> 63#include <sys/callb.h> 64#include <sys/spa_boot.h> 65#include <sys/zfs_ioctl.h> 66#include <sys/dsl_scan.h> 67#include <sys/dmu_send.h> 68#include <sys/dsl_destroy.h> 69#include <sys/dsl_userhold.h> 70#include <sys/zfeature.h> 71#include <sys/zvol.h> 72#include <sys/trim_map.h> 73 74#ifdef _KERNEL 75#include <sys/callb.h> 76#include <sys/cpupart.h> 77#include <sys/zone.h> 78#endif /* _KERNEL */ 79 80#include "zfs_prop.h" 81#include "zfs_comutil.h" 82 83/* Check hostid on import? */ 84static int check_hostid = 1; 85 86SYSCTL_DECL(_vfs_zfs); 87TUNABLE_INT("vfs.zfs.check_hostid", &check_hostid); 88SYSCTL_INT(_vfs_zfs, OID_AUTO, check_hostid, CTLFLAG_RW, &check_hostid, 0, 89 "Check hostid on import?"); 90 91/* 92 * The interval, in seconds, at which failed configuration cache file writes 93 * should be retried. 94 */ 95static int zfs_ccw_retry_interval = 300; 96 97typedef enum zti_modes { 98 ZTI_MODE_FIXED, /* value is # of threads (min 1) */ 99 ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */ 100 ZTI_MODE_NULL, /* don't create a taskq */ 101 ZTI_NMODES 102} zti_modes_t; 103 104#define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) } 105#define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 } 106#define ZTI_NULL { ZTI_MODE_NULL, 0, 0 } 107 108#define ZTI_N(n) ZTI_P(n, 1) 109#define ZTI_ONE ZTI_N(1) 110 111typedef struct zio_taskq_info { 112 zti_modes_t zti_mode; 113 uint_t zti_value; 114 uint_t zti_count; 115} zio_taskq_info_t; 116 117static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { 118 "issue", "issue_high", "intr", "intr_high" 119}; 120 121/* 122 * This table defines the taskq settings for each ZFS I/O type. When 123 * initializing a pool, we use this table to create an appropriately sized 124 * taskq. Some operations are low volume and therefore have a small, static 125 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE 126 * macros. Other operations process a large amount of data; the ZTI_BATCH 127 * macro causes us to create a taskq oriented for throughput. Some operations 128 * are so high frequency and short-lived that the taskq itself can become a a 129 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an 130 * additional degree of parallelism specified by the number of threads per- 131 * taskq and the number of taskqs; when dispatching an event in this case, the 132 * particular taskq is chosen at random. 133 * 134 * The different taskq priorities are to handle the different contexts (issue 135 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that 136 * need to be handled with minimum delay. 137 */ 138const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = { 139 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */ 140 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */ 141 { ZTI_N(8), ZTI_NULL, ZTI_BATCH, ZTI_NULL }, /* READ */ 142 { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */ 143 { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */ 144 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */ 145 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */ 146}; 147 148static void spa_sync_version(void *arg, dmu_tx_t *tx); 149static void spa_sync_props(void *arg, dmu_tx_t *tx); 150static boolean_t spa_has_active_shared_spare(spa_t *spa); 151static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config, 152 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 153 char **ereport); 154static void spa_vdev_resilver_done(spa_t *spa); 155 156uint_t zio_taskq_batch_pct = 75; /* 1 thread per cpu in pset */ 157#ifdef PSRSET_BIND 158id_t zio_taskq_psrset_bind = PS_NONE; 159#endif 160#ifdef SYSDC 161boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ 162#endif 163uint_t zio_taskq_basedc = 80; /* base duty cycle */ 164 165boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ 166extern int zfs_sync_pass_deferred_free; 167 168#ifndef illumos 169extern void spa_deadman(void *arg); 170#endif 171 172/* 173 * This (illegal) pool name is used when temporarily importing a spa_t in order 174 * to get the vdev stats associated with the imported devices. 175 */ 176#define TRYIMPORT_NAME "$import" 177 178/* 179 * ========================================================================== 180 * SPA properties routines 181 * ========================================================================== 182 */ 183 184/* 185 * Add a (source=src, propname=propval) list to an nvlist. 186 */ 187static void 188spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, 189 uint64_t intval, zprop_source_t src) 190{ 191 const char *propname = zpool_prop_to_name(prop); 192 nvlist_t *propval; 193 194 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); 195 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); 196 197 if (strval != NULL) 198 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); 199 else 200 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); 201 202 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); 203 nvlist_free(propval); 204} 205 206/* 207 * Get property values from the spa configuration. 208 */ 209static void 210spa_prop_get_config(spa_t *spa, nvlist_t **nvp) 211{ 212 vdev_t *rvd = spa->spa_root_vdev; 213 dsl_pool_t *pool = spa->spa_dsl_pool; 214 uint64_t size; 215 uint64_t alloc; 216 uint64_t space; 217 uint64_t cap, version; 218 zprop_source_t src = ZPROP_SRC_NONE; 219 spa_config_dirent_t *dp; 220 221 ASSERT(MUTEX_HELD(&spa->spa_props_lock)); 222 223 if (rvd != NULL) { 224 alloc = metaslab_class_get_alloc(spa_normal_class(spa)); 225 size = metaslab_class_get_space(spa_normal_class(spa)); 226 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); 227 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); 228 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); 229 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, 230 size - alloc, src); 231 232 space = 0; 233 for (int c = 0; c < rvd->vdev_children; c++) { 234 vdev_t *tvd = rvd->vdev_child[c]; 235 space += tvd->vdev_max_asize - tvd->vdev_asize; 236 } 237 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, space, 238 src); 239 240 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, 241 (spa_mode(spa) == FREAD), src); 242 243 cap = (size == 0) ? 0 : (alloc * 100 / size); 244 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); 245 246 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, 247 ddt_get_pool_dedup_ratio(spa), src); 248 249 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, 250 rvd->vdev_state, src); 251 252 version = spa_version(spa); 253 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) 254 src = ZPROP_SRC_DEFAULT; 255 else 256 src = ZPROP_SRC_LOCAL; 257 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src); 258 } 259 260 if (pool != NULL) { 261 dsl_dir_t *freedir = pool->dp_free_dir; 262 263 /* 264 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, 265 * when opening pools before this version freedir will be NULL. 266 */ 267 if (freedir != NULL) { 268 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, 269 freedir->dd_phys->dd_used_bytes, src); 270 } else { 271 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, 272 NULL, 0, src); 273 } 274 } 275 276 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); 277 278 if (spa->spa_comment != NULL) { 279 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, 280 0, ZPROP_SRC_LOCAL); 281 } 282 283 if (spa->spa_root != NULL) 284 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, 285 0, ZPROP_SRC_LOCAL); 286 287 if ((dp = list_head(&spa->spa_config_list)) != NULL) { 288 if (dp->scd_path == NULL) { 289 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 290 "none", 0, ZPROP_SRC_LOCAL); 291 } else if (strcmp(dp->scd_path, spa_config_path) != 0) { 292 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 293 dp->scd_path, 0, ZPROP_SRC_LOCAL); 294 } 295 } 296} 297 298/* 299 * Get zpool property values. 300 */ 301int 302spa_prop_get(spa_t *spa, nvlist_t **nvp) 303{ 304 objset_t *mos = spa->spa_meta_objset; 305 zap_cursor_t zc; 306 zap_attribute_t za; 307 int err; 308 309 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 310 311 mutex_enter(&spa->spa_props_lock); 312 313 /* 314 * Get properties from the spa config. 315 */ 316 spa_prop_get_config(spa, nvp); 317 318 /* If no pool property object, no more prop to get. */ 319 if (mos == NULL || spa->spa_pool_props_object == 0) { 320 mutex_exit(&spa->spa_props_lock); 321 return (0); 322 } 323 324 /* 325 * Get properties from the MOS pool property object. 326 */ 327 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); 328 (err = zap_cursor_retrieve(&zc, &za)) == 0; 329 zap_cursor_advance(&zc)) { 330 uint64_t intval = 0; 331 char *strval = NULL; 332 zprop_source_t src = ZPROP_SRC_DEFAULT; 333 zpool_prop_t prop; 334 335 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL) 336 continue; 337 338 switch (za.za_integer_length) { 339 case 8: 340 /* integer property */ 341 if (za.za_first_integer != 342 zpool_prop_default_numeric(prop)) 343 src = ZPROP_SRC_LOCAL; 344 345 if (prop == ZPOOL_PROP_BOOTFS) { 346 dsl_pool_t *dp; 347 dsl_dataset_t *ds = NULL; 348 349 dp = spa_get_dsl(spa); 350 dsl_pool_config_enter(dp, FTAG); 351 if (err = dsl_dataset_hold_obj(dp, 352 za.za_first_integer, FTAG, &ds)) { 353 dsl_pool_config_exit(dp, FTAG); 354 break; 355 } 356 357 strval = kmem_alloc( 358 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, 359 KM_SLEEP); 360 dsl_dataset_name(ds, strval); 361 dsl_dataset_rele(ds, FTAG); 362 dsl_pool_config_exit(dp, FTAG); 363 } else { 364 strval = NULL; 365 intval = za.za_first_integer; 366 } 367 368 spa_prop_add_list(*nvp, prop, strval, intval, src); 369 370 if (strval != NULL) 371 kmem_free(strval, 372 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); 373 374 break; 375 376 case 1: 377 /* string property */ 378 strval = kmem_alloc(za.za_num_integers, KM_SLEEP); 379 err = zap_lookup(mos, spa->spa_pool_props_object, 380 za.za_name, 1, za.za_num_integers, strval); 381 if (err) { 382 kmem_free(strval, za.za_num_integers); 383 break; 384 } 385 spa_prop_add_list(*nvp, prop, strval, 0, src); 386 kmem_free(strval, za.za_num_integers); 387 break; 388 389 default: 390 break; 391 } 392 } 393 zap_cursor_fini(&zc); 394 mutex_exit(&spa->spa_props_lock); 395out: 396 if (err && err != ENOENT) { 397 nvlist_free(*nvp); 398 *nvp = NULL; 399 return (err); 400 } 401 402 return (0); 403} 404 405/* 406 * Validate the given pool properties nvlist and modify the list 407 * for the property values to be set. 408 */ 409static int 410spa_prop_validate(spa_t *spa, nvlist_t *props) 411{ 412 nvpair_t *elem; 413 int error = 0, reset_bootfs = 0; 414 uint64_t objnum = 0; 415 boolean_t has_feature = B_FALSE; 416 417 elem = NULL; 418 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 419 uint64_t intval; 420 char *strval, *slash, *check, *fname; 421 const char *propname = nvpair_name(elem); 422 zpool_prop_t prop = zpool_name_to_prop(propname); 423 424 switch (prop) { 425 case ZPROP_INVAL: 426 if (!zpool_prop_feature(propname)) { 427 error = SET_ERROR(EINVAL); 428 break; 429 } 430 431 /* 432 * Sanitize the input. 433 */ 434 if (nvpair_type(elem) != DATA_TYPE_UINT64) { 435 error = SET_ERROR(EINVAL); 436 break; 437 } 438 439 if (nvpair_value_uint64(elem, &intval) != 0) { 440 error = SET_ERROR(EINVAL); 441 break; 442 } 443 444 if (intval != 0) { 445 error = SET_ERROR(EINVAL); 446 break; 447 } 448 449 fname = strchr(propname, '@') + 1; 450 if (zfeature_lookup_name(fname, NULL) != 0) { 451 error = SET_ERROR(EINVAL); 452 break; 453 } 454 455 has_feature = B_TRUE; 456 break; 457 458 case ZPOOL_PROP_VERSION: 459 error = nvpair_value_uint64(elem, &intval); 460 if (!error && 461 (intval < spa_version(spa) || 462 intval > SPA_VERSION_BEFORE_FEATURES || 463 has_feature)) 464 error = SET_ERROR(EINVAL); 465 break; 466 467 case ZPOOL_PROP_DELEGATION: 468 case ZPOOL_PROP_AUTOREPLACE: 469 case ZPOOL_PROP_LISTSNAPS: 470 case ZPOOL_PROP_AUTOEXPAND: 471 error = nvpair_value_uint64(elem, &intval); 472 if (!error && intval > 1) 473 error = SET_ERROR(EINVAL); 474 break; 475 476 case ZPOOL_PROP_BOOTFS: 477 /* 478 * If the pool version is less than SPA_VERSION_BOOTFS, 479 * or the pool is still being created (version == 0), 480 * the bootfs property cannot be set. 481 */ 482 if (spa_version(spa) < SPA_VERSION_BOOTFS) { 483 error = SET_ERROR(ENOTSUP); 484 break; 485 } 486 487 /* 488 * Make sure the vdev config is bootable 489 */ 490 if (!vdev_is_bootable(spa->spa_root_vdev)) { 491 error = SET_ERROR(ENOTSUP); 492 break; 493 } 494 495 reset_bootfs = 1; 496 497 error = nvpair_value_string(elem, &strval); 498 499 if (!error) { 500 objset_t *os; 501 uint64_t compress; 502 503 if (strval == NULL || strval[0] == '\0') { 504 objnum = zpool_prop_default_numeric( 505 ZPOOL_PROP_BOOTFS); 506 break; 507 } 508 509 if (error = dmu_objset_hold(strval, FTAG, &os)) 510 break; 511 512 /* Must be ZPL and not gzip compressed. */ 513 514 if (dmu_objset_type(os) != DMU_OST_ZFS) { 515 error = SET_ERROR(ENOTSUP); 516 } else if ((error = 517 dsl_prop_get_int_ds(dmu_objset_ds(os), 518 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 519 &compress)) == 0 && 520 !BOOTFS_COMPRESS_VALID(compress)) { 521 error = SET_ERROR(ENOTSUP); 522 } else { 523 objnum = dmu_objset_id(os); 524 } 525 dmu_objset_rele(os, FTAG); 526 } 527 break; 528 529 case ZPOOL_PROP_FAILUREMODE: 530 error = nvpair_value_uint64(elem, &intval); 531 if (!error && (intval < ZIO_FAILURE_MODE_WAIT || 532 intval > ZIO_FAILURE_MODE_PANIC)) 533 error = SET_ERROR(EINVAL); 534 535 /* 536 * This is a special case which only occurs when 537 * the pool has completely failed. This allows 538 * the user to change the in-core failmode property 539 * without syncing it out to disk (I/Os might 540 * currently be blocked). We do this by returning 541 * EIO to the caller (spa_prop_set) to trick it 542 * into thinking we encountered a property validation 543 * error. 544 */ 545 if (!error && spa_suspended(spa)) { 546 spa->spa_failmode = intval; 547 error = SET_ERROR(EIO); 548 } 549 break; 550 551 case ZPOOL_PROP_CACHEFILE: 552 if ((error = nvpair_value_string(elem, &strval)) != 0) 553 break; 554 555 if (strval[0] == '\0') 556 break; 557 558 if (strcmp(strval, "none") == 0) 559 break; 560 561 if (strval[0] != '/') { 562 error = SET_ERROR(EINVAL); 563 break; 564 } 565 566 slash = strrchr(strval, '/'); 567 ASSERT(slash != NULL); 568 569 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 570 strcmp(slash, "/..") == 0) 571 error = SET_ERROR(EINVAL); 572 break; 573 574 case ZPOOL_PROP_COMMENT: 575 if ((error = nvpair_value_string(elem, &strval)) != 0) 576 break; 577 for (check = strval; *check != '\0'; check++) { 578 /* 579 * The kernel doesn't have an easy isprint() 580 * check. For this kernel check, we merely 581 * check ASCII apart from DEL. Fix this if 582 * there is an easy-to-use kernel isprint(). 583 */ 584 if (*check >= 0x7f) { 585 error = SET_ERROR(EINVAL); 586 break; 587 } 588 check++; 589 } 590 if (strlen(strval) > ZPROP_MAX_COMMENT) 591 error = E2BIG; 592 break; 593 594 case ZPOOL_PROP_DEDUPDITTO: 595 if (spa_version(spa) < SPA_VERSION_DEDUP) 596 error = SET_ERROR(ENOTSUP); 597 else 598 error = nvpair_value_uint64(elem, &intval); 599 if (error == 0 && 600 intval != 0 && intval < ZIO_DEDUPDITTO_MIN) 601 error = SET_ERROR(EINVAL); 602 break; 603 } 604 605 if (error) 606 break; 607 } 608 609 if (!error && reset_bootfs) { 610 error = nvlist_remove(props, 611 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); 612 613 if (!error) { 614 error = nvlist_add_uint64(props, 615 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); 616 } 617 } 618 619 return (error); 620} 621 622void 623spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) 624{ 625 char *cachefile; 626 spa_config_dirent_t *dp; 627 628 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), 629 &cachefile) != 0) 630 return; 631 632 dp = kmem_alloc(sizeof (spa_config_dirent_t), 633 KM_SLEEP); 634 635 if (cachefile[0] == '\0') 636 dp->scd_path = spa_strdup(spa_config_path); 637 else if (strcmp(cachefile, "none") == 0) 638 dp->scd_path = NULL; 639 else 640 dp->scd_path = spa_strdup(cachefile); 641 642 list_insert_head(&spa->spa_config_list, dp); 643 if (need_sync) 644 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 645} 646 647int 648spa_prop_set(spa_t *spa, nvlist_t *nvp) 649{ 650 int error; 651 nvpair_t *elem = NULL; 652 boolean_t need_sync = B_FALSE; 653 654 if ((error = spa_prop_validate(spa, nvp)) != 0) 655 return (error); 656 657 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { 658 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); 659 660 if (prop == ZPOOL_PROP_CACHEFILE || 661 prop == ZPOOL_PROP_ALTROOT || 662 prop == ZPOOL_PROP_READONLY) 663 continue; 664 665 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) { 666 uint64_t ver; 667 668 if (prop == ZPOOL_PROP_VERSION) { 669 VERIFY(nvpair_value_uint64(elem, &ver) == 0); 670 } else { 671 ASSERT(zpool_prop_feature(nvpair_name(elem))); 672 ver = SPA_VERSION_FEATURES; 673 need_sync = B_TRUE; 674 } 675 676 /* Save time if the version is already set. */ 677 if (ver == spa_version(spa)) 678 continue; 679 680 /* 681 * In addition to the pool directory object, we might 682 * create the pool properties object, the features for 683 * read object, the features for write object, or the 684 * feature descriptions object. 685 */ 686 error = dsl_sync_task(spa->spa_name, NULL, 687 spa_sync_version, &ver, 6); 688 if (error) 689 return (error); 690 continue; 691 } 692 693 need_sync = B_TRUE; 694 break; 695 } 696 697 if (need_sync) { 698 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props, 699 nvp, 6)); 700 } 701 702 return (0); 703} 704 705/* 706 * If the bootfs property value is dsobj, clear it. 707 */ 708void 709spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) 710{ 711 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { 712 VERIFY(zap_remove(spa->spa_meta_objset, 713 spa->spa_pool_props_object, 714 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); 715 spa->spa_bootfs = 0; 716 } 717} 718 719/*ARGSUSED*/ 720static int 721spa_change_guid_check(void *arg, dmu_tx_t *tx) 722{ 723 uint64_t *newguid = arg; 724 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 725 vdev_t *rvd = spa->spa_root_vdev; 726 uint64_t vdev_state; 727 728 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 729 vdev_state = rvd->vdev_state; 730 spa_config_exit(spa, SCL_STATE, FTAG); 731 732 if (vdev_state != VDEV_STATE_HEALTHY) 733 return (SET_ERROR(ENXIO)); 734 735 ASSERT3U(spa_guid(spa), !=, *newguid); 736 737 return (0); 738} 739 740static void 741spa_change_guid_sync(void *arg, dmu_tx_t *tx) 742{ 743 uint64_t *newguid = arg; 744 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 745 uint64_t oldguid; 746 vdev_t *rvd = spa->spa_root_vdev; 747 748 oldguid = spa_guid(spa); 749 750 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 751 rvd->vdev_guid = *newguid; 752 rvd->vdev_guid_sum += (*newguid - oldguid); 753 vdev_config_dirty(rvd); 754 spa_config_exit(spa, SCL_STATE, FTAG); 755 756 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu", 757 oldguid, *newguid); 758} 759 760/* 761 * Change the GUID for the pool. This is done so that we can later 762 * re-import a pool built from a clone of our own vdevs. We will modify 763 * the root vdev's guid, our own pool guid, and then mark all of our 764 * vdevs dirty. Note that we must make sure that all our vdevs are 765 * online when we do this, or else any vdevs that weren't present 766 * would be orphaned from our pool. We are also going to issue a 767 * sysevent to update any watchers. 768 */ 769int 770spa_change_guid(spa_t *spa) 771{ 772 int error; 773 uint64_t guid; 774 775 mutex_enter(&spa->spa_vdev_top_lock); 776 mutex_enter(&spa_namespace_lock); 777 guid = spa_generate_guid(NULL); 778 779 error = dsl_sync_task(spa->spa_name, spa_change_guid_check, 780 spa_change_guid_sync, &guid, 5); 781 782 if (error == 0) { 783 spa_config_sync(spa, B_FALSE, B_TRUE); 784 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID); 785 } 786 787 mutex_exit(&spa_namespace_lock); 788 mutex_exit(&spa->spa_vdev_top_lock); 789 790 return (error); 791} 792 793/* 794 * ========================================================================== 795 * SPA state manipulation (open/create/destroy/import/export) 796 * ========================================================================== 797 */ 798 799static int 800spa_error_entry_compare(const void *a, const void *b) 801{ 802 spa_error_entry_t *sa = (spa_error_entry_t *)a; 803 spa_error_entry_t *sb = (spa_error_entry_t *)b; 804 int ret; 805 806 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, 807 sizeof (zbookmark_t)); 808 809 if (ret < 0) 810 return (-1); 811 else if (ret > 0) 812 return (1); 813 else 814 return (0); 815} 816 817/* 818 * Utility function which retrieves copies of the current logs and 819 * re-initializes them in the process. 820 */ 821void 822spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 823{ 824 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); 825 826 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); 827 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); 828 829 avl_create(&spa->spa_errlist_scrub, 830 spa_error_entry_compare, sizeof (spa_error_entry_t), 831 offsetof(spa_error_entry_t, se_avl)); 832 avl_create(&spa->spa_errlist_last, 833 spa_error_entry_compare, sizeof (spa_error_entry_t), 834 offsetof(spa_error_entry_t, se_avl)); 835} 836 837static void 838spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 839{ 840 const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; 841 enum zti_modes mode = ztip->zti_mode; 842 uint_t value = ztip->zti_value; 843 uint_t count = ztip->zti_count; 844 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 845 char name[32]; 846 uint_t flags = 0; 847 boolean_t batch = B_FALSE; 848 849 if (mode == ZTI_MODE_NULL) { 850 tqs->stqs_count = 0; 851 tqs->stqs_taskq = NULL; 852 return; 853 } 854 855 ASSERT3U(count, >, 0); 856 857 tqs->stqs_count = count; 858 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP); 859 860 switch (mode) { 861 case ZTI_MODE_FIXED: 862 ASSERT3U(value, >=, 1); 863 value = MAX(value, 1); 864 break; 865 866 case ZTI_MODE_BATCH: 867 batch = B_TRUE; 868 flags |= TASKQ_THREADS_CPU_PCT; 869 value = zio_taskq_batch_pct; 870 break; 871 872 default: 873 panic("unrecognized mode for %s_%s taskq (%u:%u) in " 874 "spa_activate()", 875 zio_type_name[t], zio_taskq_types[q], mode, value); 876 break; 877 } 878 879 for (uint_t i = 0; i < count; i++) { 880 taskq_t *tq; 881 882 if (count > 1) { 883 (void) snprintf(name, sizeof (name), "%s_%s_%u", 884 zio_type_name[t], zio_taskq_types[q], i); 885 } else { 886 (void) snprintf(name, sizeof (name), "%s_%s", 887 zio_type_name[t], zio_taskq_types[q]); 888 } 889 890#ifdef SYSDC 891 if (zio_taskq_sysdc && spa->spa_proc != &p0) { 892 if (batch) 893 flags |= TASKQ_DC_BATCH; 894 895 tq = taskq_create_sysdc(name, value, 50, INT_MAX, 896 spa->spa_proc, zio_taskq_basedc, flags); 897 } else { 898#endif 899 pri_t pri = maxclsyspri; 900 /* 901 * The write issue taskq can be extremely CPU 902 * intensive. Run it at slightly lower priority 903 * than the other taskqs. 904 */ 905 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) 906 pri--; 907 908 tq = taskq_create_proc(name, value, pri, 50, 909 INT_MAX, spa->spa_proc, flags); 910#ifdef SYSDC 911 } 912#endif 913 914 tqs->stqs_taskq[i] = tq; 915 } 916} 917 918static void 919spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 920{ 921 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 922 923 if (tqs->stqs_taskq == NULL) { 924 ASSERT0(tqs->stqs_count); 925 return; 926 } 927 928 for (uint_t i = 0; i < tqs->stqs_count; i++) { 929 ASSERT3P(tqs->stqs_taskq[i], !=, NULL); 930 taskq_destroy(tqs->stqs_taskq[i]); 931 } 932 933 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *)); 934 tqs->stqs_taskq = NULL; 935} 936 937/* 938 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority. 939 * Note that a type may have multiple discrete taskqs to avoid lock contention 940 * on the taskq itself. In that case we choose which taskq at random by using 941 * the low bits of gethrtime(). 942 */ 943void 944spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 945 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent) 946{ 947 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 948 taskq_t *tq; 949 950 ASSERT3P(tqs->stqs_taskq, !=, NULL); 951 ASSERT3U(tqs->stqs_count, !=, 0); 952 953 if (tqs->stqs_count == 1) { 954 tq = tqs->stqs_taskq[0]; 955 } else { 956 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 957 } 958 959 taskq_dispatch_ent(tq, func, arg, flags, ent); 960} 961 962static void 963spa_create_zio_taskqs(spa_t *spa) 964{ 965 for (int t = 0; t < ZIO_TYPES; t++) { 966 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 967 spa_taskqs_init(spa, t, q); 968 } 969 } 970} 971 972#ifdef _KERNEL 973#ifdef SPA_PROCESS 974static void 975spa_thread(void *arg) 976{ 977 callb_cpr_t cprinfo; 978 979 spa_t *spa = arg; 980 user_t *pu = PTOU(curproc); 981 982 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 983 spa->spa_name); 984 985 ASSERT(curproc != &p0); 986 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 987 "zpool-%s", spa->spa_name); 988 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 989 990#ifdef PSRSET_BIND 991 /* bind this thread to the requested psrset */ 992 if (zio_taskq_psrset_bind != PS_NONE) { 993 pool_lock(); 994 mutex_enter(&cpu_lock); 995 mutex_enter(&pidlock); 996 mutex_enter(&curproc->p_lock); 997 998 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 999 0, NULL, NULL) == 0) { 1000 curthread->t_bind_pset = zio_taskq_psrset_bind; 1001 } else { 1002 cmn_err(CE_WARN, 1003 "Couldn't bind process for zfs pool \"%s\" to " 1004 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1005 } 1006 1007 mutex_exit(&curproc->p_lock); 1008 mutex_exit(&pidlock); 1009 mutex_exit(&cpu_lock); 1010 pool_unlock(); 1011 } 1012#endif 1013 1014#ifdef SYSDC 1015 if (zio_taskq_sysdc) { 1016 sysdc_thread_enter(curthread, 100, 0); 1017 } 1018#endif 1019 1020 spa->spa_proc = curproc; 1021 spa->spa_did = curthread->t_did; 1022 1023 spa_create_zio_taskqs(spa); 1024 1025 mutex_enter(&spa->spa_proc_lock); 1026 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1027 1028 spa->spa_proc_state = SPA_PROC_ACTIVE; 1029 cv_broadcast(&spa->spa_proc_cv); 1030 1031 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1032 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1033 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1034 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1035 1036 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1037 spa->spa_proc_state = SPA_PROC_GONE; 1038 spa->spa_proc = &p0; 1039 cv_broadcast(&spa->spa_proc_cv); 1040 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1041 1042 mutex_enter(&curproc->p_lock); 1043 lwp_exit(); 1044} 1045#endif /* SPA_PROCESS */ 1046#endif 1047 1048/* 1049 * Activate an uninitialized pool. 1050 */ 1051static void 1052spa_activate(spa_t *spa, int mode) 1053{ 1054 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1055 1056 spa->spa_state = POOL_STATE_ACTIVE; 1057 spa->spa_mode = mode; 1058 1059 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1060 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1061 1062 /* Try to create a covering process */ 1063 mutex_enter(&spa->spa_proc_lock); 1064 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1065 ASSERT(spa->spa_proc == &p0); 1066 spa->spa_did = 0; 1067 1068#ifdef SPA_PROCESS 1069 /* Only create a process if we're going to be around a while. */ 1070 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1071 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1072 NULL, 0) == 0) { 1073 spa->spa_proc_state = SPA_PROC_CREATED; 1074 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1075 cv_wait(&spa->spa_proc_cv, 1076 &spa->spa_proc_lock); 1077 } 1078 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1079 ASSERT(spa->spa_proc != &p0); 1080 ASSERT(spa->spa_did != 0); 1081 } else { 1082#ifdef _KERNEL 1083 cmn_err(CE_WARN, 1084 "Couldn't create process for zfs pool \"%s\"\n", 1085 spa->spa_name); 1086#endif 1087 } 1088 } 1089#endif /* SPA_PROCESS */ 1090 mutex_exit(&spa->spa_proc_lock); 1091 1092 /* If we didn't create a process, we need to create our taskqs. */ 1093 ASSERT(spa->spa_proc == &p0); 1094 if (spa->spa_proc == &p0) { 1095 spa_create_zio_taskqs(spa); 1096 } 1097 1098 /* 1099 * Start TRIM thread. 1100 */ 1101 trim_thread_create(spa); 1102 1103 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1104 offsetof(vdev_t, vdev_config_dirty_node)); 1105 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1106 offsetof(vdev_t, vdev_state_dirty_node)); 1107 1108 txg_list_create(&spa->spa_vdev_txg_list, 1109 offsetof(struct vdev, vdev_txg_node)); 1110 1111 avl_create(&spa->spa_errlist_scrub, 1112 spa_error_entry_compare, sizeof (spa_error_entry_t), 1113 offsetof(spa_error_entry_t, se_avl)); 1114 avl_create(&spa->spa_errlist_last, 1115 spa_error_entry_compare, sizeof (spa_error_entry_t), 1116 offsetof(spa_error_entry_t, se_avl)); 1117} 1118 1119/* 1120 * Opposite of spa_activate(). 1121 */ 1122static void 1123spa_deactivate(spa_t *spa) 1124{ 1125 ASSERT(spa->spa_sync_on == B_FALSE); 1126 ASSERT(spa->spa_dsl_pool == NULL); 1127 ASSERT(spa->spa_root_vdev == NULL); 1128 ASSERT(spa->spa_async_zio_root == NULL); 1129 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1130 1131 /* 1132 * Stop TRIM thread in case spa_unload() wasn't called directly 1133 * before spa_deactivate(). 1134 */ 1135 trim_thread_destroy(spa); 1136 1137 txg_list_destroy(&spa->spa_vdev_txg_list); 1138 1139 list_destroy(&spa->spa_config_dirty_list); 1140 list_destroy(&spa->spa_state_dirty_list); 1141 1142 for (int t = 0; t < ZIO_TYPES; t++) { 1143 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1144 spa_taskqs_fini(spa, t, q); 1145 } 1146 } 1147 1148 metaslab_class_destroy(spa->spa_normal_class); 1149 spa->spa_normal_class = NULL; 1150 1151 metaslab_class_destroy(spa->spa_log_class); 1152 spa->spa_log_class = NULL; 1153 1154 /* 1155 * If this was part of an import or the open otherwise failed, we may 1156 * still have errors left in the queues. Empty them just in case. 1157 */ 1158 spa_errlog_drain(spa); 1159 1160 avl_destroy(&spa->spa_errlist_scrub); 1161 avl_destroy(&spa->spa_errlist_last); 1162 1163 spa->spa_state = POOL_STATE_UNINITIALIZED; 1164 1165 mutex_enter(&spa->spa_proc_lock); 1166 if (spa->spa_proc_state != SPA_PROC_NONE) { 1167 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1168 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1169 cv_broadcast(&spa->spa_proc_cv); 1170 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1171 ASSERT(spa->spa_proc != &p0); 1172 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1173 } 1174 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1175 spa->spa_proc_state = SPA_PROC_NONE; 1176 } 1177 ASSERT(spa->spa_proc == &p0); 1178 mutex_exit(&spa->spa_proc_lock); 1179 1180#ifdef SPA_PROCESS 1181 /* 1182 * We want to make sure spa_thread() has actually exited the ZFS 1183 * module, so that the module can't be unloaded out from underneath 1184 * it. 1185 */ 1186 if (spa->spa_did != 0) { 1187 thread_join(spa->spa_did); 1188 spa->spa_did = 0; 1189 } 1190#endif /* SPA_PROCESS */ 1191} 1192 1193/* 1194 * Verify a pool configuration, and construct the vdev tree appropriately. This 1195 * will create all the necessary vdevs in the appropriate layout, with each vdev 1196 * in the CLOSED state. This will prep the pool before open/creation/import. 1197 * All vdev validation is done by the vdev_alloc() routine. 1198 */ 1199static int 1200spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1201 uint_t id, int atype) 1202{ 1203 nvlist_t **child; 1204 uint_t children; 1205 int error; 1206 1207 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1208 return (error); 1209 1210 if ((*vdp)->vdev_ops->vdev_op_leaf) 1211 return (0); 1212 1213 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1214 &child, &children); 1215 1216 if (error == ENOENT) 1217 return (0); 1218 1219 if (error) { 1220 vdev_free(*vdp); 1221 *vdp = NULL; 1222 return (SET_ERROR(EINVAL)); 1223 } 1224 1225 for (int c = 0; c < children; c++) { 1226 vdev_t *vd; 1227 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1228 atype)) != 0) { 1229 vdev_free(*vdp); 1230 *vdp = NULL; 1231 return (error); 1232 } 1233 } 1234 1235 ASSERT(*vdp != NULL); 1236 1237 return (0); 1238} 1239 1240/* 1241 * Opposite of spa_load(). 1242 */ 1243static void 1244spa_unload(spa_t *spa) 1245{ 1246 int i; 1247 1248 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1249 1250 /* 1251 * Stop TRIM thread. 1252 */ 1253 trim_thread_destroy(spa); 1254 1255 /* 1256 * Stop async tasks. 1257 */ 1258 spa_async_suspend(spa); 1259 1260 /* 1261 * Stop syncing. 1262 */ 1263 if (spa->spa_sync_on) { 1264 txg_sync_stop(spa->spa_dsl_pool); 1265 spa->spa_sync_on = B_FALSE; 1266 } 1267 1268 /* 1269 * Wait for any outstanding async I/O to complete. 1270 */ 1271 if (spa->spa_async_zio_root != NULL) { 1272 (void) zio_wait(spa->spa_async_zio_root); 1273 spa->spa_async_zio_root = NULL; 1274 } 1275 1276 bpobj_close(&spa->spa_deferred_bpobj); 1277 1278 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1279 1280 /* 1281 * Close all vdevs. 1282 */ 1283 if (spa->spa_root_vdev) 1284 vdev_free(spa->spa_root_vdev); 1285 ASSERT(spa->spa_root_vdev == NULL); 1286 1287 /* 1288 * Close the dsl pool. 1289 */ 1290 if (spa->spa_dsl_pool) { 1291 dsl_pool_close(spa->spa_dsl_pool); 1292 spa->spa_dsl_pool = NULL; 1293 spa->spa_meta_objset = NULL; 1294 } 1295 1296 ddt_unload(spa); 1297 1298 1299 /* 1300 * Drop and purge level 2 cache 1301 */ 1302 spa_l2cache_drop(spa); 1303 1304 for (i = 0; i < spa->spa_spares.sav_count; i++) 1305 vdev_free(spa->spa_spares.sav_vdevs[i]); 1306 if (spa->spa_spares.sav_vdevs) { 1307 kmem_free(spa->spa_spares.sav_vdevs, 1308 spa->spa_spares.sav_count * sizeof (void *)); 1309 spa->spa_spares.sav_vdevs = NULL; 1310 } 1311 if (spa->spa_spares.sav_config) { 1312 nvlist_free(spa->spa_spares.sav_config); 1313 spa->spa_spares.sav_config = NULL; 1314 } 1315 spa->spa_spares.sav_count = 0; 1316 1317 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1318 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1319 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1320 } 1321 if (spa->spa_l2cache.sav_vdevs) { 1322 kmem_free(spa->spa_l2cache.sav_vdevs, 1323 spa->spa_l2cache.sav_count * sizeof (void *)); 1324 spa->spa_l2cache.sav_vdevs = NULL; 1325 } 1326 if (spa->spa_l2cache.sav_config) { 1327 nvlist_free(spa->spa_l2cache.sav_config); 1328 spa->spa_l2cache.sav_config = NULL; 1329 } 1330 spa->spa_l2cache.sav_count = 0; 1331 1332 spa->spa_async_suspended = 0; 1333 1334 if (spa->spa_comment != NULL) { 1335 spa_strfree(spa->spa_comment); 1336 spa->spa_comment = NULL; 1337 } 1338 1339 spa_config_exit(spa, SCL_ALL, FTAG); 1340} 1341 1342/* 1343 * Load (or re-load) the current list of vdevs describing the active spares for 1344 * this pool. When this is called, we have some form of basic information in 1345 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1346 * then re-generate a more complete list including status information. 1347 */ 1348static void 1349spa_load_spares(spa_t *spa) 1350{ 1351 nvlist_t **spares; 1352 uint_t nspares; 1353 int i; 1354 vdev_t *vd, *tvd; 1355 1356 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1357 1358 /* 1359 * First, close and free any existing spare vdevs. 1360 */ 1361 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1362 vd = spa->spa_spares.sav_vdevs[i]; 1363 1364 /* Undo the call to spa_activate() below */ 1365 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1366 B_FALSE)) != NULL && tvd->vdev_isspare) 1367 spa_spare_remove(tvd); 1368 vdev_close(vd); 1369 vdev_free(vd); 1370 } 1371 1372 if (spa->spa_spares.sav_vdevs) 1373 kmem_free(spa->spa_spares.sav_vdevs, 1374 spa->spa_spares.sav_count * sizeof (void *)); 1375 1376 if (spa->spa_spares.sav_config == NULL) 1377 nspares = 0; 1378 else 1379 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1380 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1381 1382 spa->spa_spares.sav_count = (int)nspares; 1383 spa->spa_spares.sav_vdevs = NULL; 1384 1385 if (nspares == 0) 1386 return; 1387 1388 /* 1389 * Construct the array of vdevs, opening them to get status in the 1390 * process. For each spare, there is potentially two different vdev_t 1391 * structures associated with it: one in the list of spares (used only 1392 * for basic validation purposes) and one in the active vdev 1393 * configuration (if it's spared in). During this phase we open and 1394 * validate each vdev on the spare list. If the vdev also exists in the 1395 * active configuration, then we also mark this vdev as an active spare. 1396 */ 1397 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1398 KM_SLEEP); 1399 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1400 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1401 VDEV_ALLOC_SPARE) == 0); 1402 ASSERT(vd != NULL); 1403 1404 spa->spa_spares.sav_vdevs[i] = vd; 1405 1406 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1407 B_FALSE)) != NULL) { 1408 if (!tvd->vdev_isspare) 1409 spa_spare_add(tvd); 1410 1411 /* 1412 * We only mark the spare active if we were successfully 1413 * able to load the vdev. Otherwise, importing a pool 1414 * with a bad active spare would result in strange 1415 * behavior, because multiple pool would think the spare 1416 * is actively in use. 1417 * 1418 * There is a vulnerability here to an equally bizarre 1419 * circumstance, where a dead active spare is later 1420 * brought back to life (onlined or otherwise). Given 1421 * the rarity of this scenario, and the extra complexity 1422 * it adds, we ignore the possibility. 1423 */ 1424 if (!vdev_is_dead(tvd)) 1425 spa_spare_activate(tvd); 1426 } 1427 1428 vd->vdev_top = vd; 1429 vd->vdev_aux = &spa->spa_spares; 1430 1431 if (vdev_open(vd) != 0) 1432 continue; 1433 1434 if (vdev_validate_aux(vd) == 0) 1435 spa_spare_add(vd); 1436 } 1437 1438 /* 1439 * Recompute the stashed list of spares, with status information 1440 * this time. 1441 */ 1442 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1443 DATA_TYPE_NVLIST_ARRAY) == 0); 1444 1445 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1446 KM_SLEEP); 1447 for (i = 0; i < spa->spa_spares.sav_count; i++) 1448 spares[i] = vdev_config_generate(spa, 1449 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1450 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1451 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1452 for (i = 0; i < spa->spa_spares.sav_count; i++) 1453 nvlist_free(spares[i]); 1454 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1455} 1456 1457/* 1458 * Load (or re-load) the current list of vdevs describing the active l2cache for 1459 * this pool. When this is called, we have some form of basic information in 1460 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1461 * then re-generate a more complete list including status information. 1462 * Devices which are already active have their details maintained, and are 1463 * not re-opened. 1464 */ 1465static void 1466spa_load_l2cache(spa_t *spa) 1467{ 1468 nvlist_t **l2cache; 1469 uint_t nl2cache; 1470 int i, j, oldnvdevs; 1471 uint64_t guid; 1472 vdev_t *vd, **oldvdevs, **newvdevs; 1473 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1474 1475 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1476 1477 if (sav->sav_config != NULL) { 1478 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1479 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1480 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1481 } else { 1482 nl2cache = 0; 1483 newvdevs = NULL; 1484 } 1485 1486 oldvdevs = sav->sav_vdevs; 1487 oldnvdevs = sav->sav_count; 1488 sav->sav_vdevs = NULL; 1489 sav->sav_count = 0; 1490 1491 /* 1492 * Process new nvlist of vdevs. 1493 */ 1494 for (i = 0; i < nl2cache; i++) { 1495 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1496 &guid) == 0); 1497 1498 newvdevs[i] = NULL; 1499 for (j = 0; j < oldnvdevs; j++) { 1500 vd = oldvdevs[j]; 1501 if (vd != NULL && guid == vd->vdev_guid) { 1502 /* 1503 * Retain previous vdev for add/remove ops. 1504 */ 1505 newvdevs[i] = vd; 1506 oldvdevs[j] = NULL; 1507 break; 1508 } 1509 } 1510 1511 if (newvdevs[i] == NULL) { 1512 /* 1513 * Create new vdev 1514 */ 1515 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1516 VDEV_ALLOC_L2CACHE) == 0); 1517 ASSERT(vd != NULL); 1518 newvdevs[i] = vd; 1519 1520 /* 1521 * Commit this vdev as an l2cache device, 1522 * even if it fails to open. 1523 */ 1524 spa_l2cache_add(vd); 1525 1526 vd->vdev_top = vd; 1527 vd->vdev_aux = sav; 1528 1529 spa_l2cache_activate(vd); 1530 1531 if (vdev_open(vd) != 0) 1532 continue; 1533 1534 (void) vdev_validate_aux(vd); 1535 1536 if (!vdev_is_dead(vd)) 1537 l2arc_add_vdev(spa, vd); 1538 } 1539 } 1540 1541 /* 1542 * Purge vdevs that were dropped 1543 */ 1544 for (i = 0; i < oldnvdevs; i++) { 1545 uint64_t pool; 1546 1547 vd = oldvdevs[i]; 1548 if (vd != NULL) { 1549 ASSERT(vd->vdev_isl2cache); 1550 1551 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1552 pool != 0ULL && l2arc_vdev_present(vd)) 1553 l2arc_remove_vdev(vd); 1554 vdev_clear_stats(vd); 1555 vdev_free(vd); 1556 } 1557 } 1558 1559 if (oldvdevs) 1560 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1561 1562 if (sav->sav_config == NULL) 1563 goto out; 1564 1565 sav->sav_vdevs = newvdevs; 1566 sav->sav_count = (int)nl2cache; 1567 1568 /* 1569 * Recompute the stashed list of l2cache devices, with status 1570 * information this time. 1571 */ 1572 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1573 DATA_TYPE_NVLIST_ARRAY) == 0); 1574 1575 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1576 for (i = 0; i < sav->sav_count; i++) 1577 l2cache[i] = vdev_config_generate(spa, 1578 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1579 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1580 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1581out: 1582 for (i = 0; i < sav->sav_count; i++) 1583 nvlist_free(l2cache[i]); 1584 if (sav->sav_count) 1585 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1586} 1587 1588static int 1589load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1590{ 1591 dmu_buf_t *db; 1592 char *packed = NULL; 1593 size_t nvsize = 0; 1594 int error; 1595 *value = NULL; 1596 1597 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1598 if (error != 0) 1599 return (error); 1600 nvsize = *(uint64_t *)db->db_data; 1601 dmu_buf_rele(db, FTAG); 1602 1603 packed = kmem_alloc(nvsize, KM_SLEEP); 1604 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1605 DMU_READ_PREFETCH); 1606 if (error == 0) 1607 error = nvlist_unpack(packed, nvsize, value, 0); 1608 kmem_free(packed, nvsize); 1609 1610 return (error); 1611} 1612 1613/* 1614 * Checks to see if the given vdev could not be opened, in which case we post a 1615 * sysevent to notify the autoreplace code that the device has been removed. 1616 */ 1617static void 1618spa_check_removed(vdev_t *vd) 1619{ 1620 for (int c = 0; c < vd->vdev_children; c++) 1621 spa_check_removed(vd->vdev_child[c]); 1622 1623 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1624 !vd->vdev_ishole) { 1625 zfs_post_autoreplace(vd->vdev_spa, vd); 1626 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); 1627 } 1628} 1629 1630/* 1631 * Validate the current config against the MOS config 1632 */ 1633static boolean_t 1634spa_config_valid(spa_t *spa, nvlist_t *config) 1635{ 1636 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 1637 nvlist_t *nv; 1638 1639 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); 1640 1641 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1642 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 1643 1644 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); 1645 1646 /* 1647 * If we're doing a normal import, then build up any additional 1648 * diagnostic information about missing devices in this config. 1649 * We'll pass this up to the user for further processing. 1650 */ 1651 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1652 nvlist_t **child, *nv; 1653 uint64_t idx = 0; 1654 1655 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1656 KM_SLEEP); 1657 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1658 1659 for (int c = 0; c < rvd->vdev_children; c++) { 1660 vdev_t *tvd = rvd->vdev_child[c]; 1661 vdev_t *mtvd = mrvd->vdev_child[c]; 1662 1663 if (tvd->vdev_ops == &vdev_missing_ops && 1664 mtvd->vdev_ops != &vdev_missing_ops && 1665 mtvd->vdev_islog) 1666 child[idx++] = vdev_config_generate(spa, mtvd, 1667 B_FALSE, 0); 1668 } 1669 1670 if (idx) { 1671 VERIFY(nvlist_add_nvlist_array(nv, 1672 ZPOOL_CONFIG_CHILDREN, child, idx) == 0); 1673 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 1674 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); 1675 1676 for (int i = 0; i < idx; i++) 1677 nvlist_free(child[i]); 1678 } 1679 nvlist_free(nv); 1680 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1681 } 1682 1683 /* 1684 * Compare the root vdev tree with the information we have 1685 * from the MOS config (mrvd). Check each top-level vdev 1686 * with the corresponding MOS config top-level (mtvd). 1687 */ 1688 for (int c = 0; c < rvd->vdev_children; c++) { 1689 vdev_t *tvd = rvd->vdev_child[c]; 1690 vdev_t *mtvd = mrvd->vdev_child[c]; 1691 1692 /* 1693 * Resolve any "missing" vdevs in the current configuration. 1694 * If we find that the MOS config has more accurate information 1695 * about the top-level vdev then use that vdev instead. 1696 */ 1697 if (tvd->vdev_ops == &vdev_missing_ops && 1698 mtvd->vdev_ops != &vdev_missing_ops) { 1699 1700 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) 1701 continue; 1702 1703 /* 1704 * Device specific actions. 1705 */ 1706 if (mtvd->vdev_islog) { 1707 spa_set_log_state(spa, SPA_LOG_CLEAR); 1708 } else { 1709 /* 1710 * XXX - once we have 'readonly' pool 1711 * support we should be able to handle 1712 * missing data devices by transitioning 1713 * the pool to readonly. 1714 */ 1715 continue; 1716 } 1717 1718 /* 1719 * Swap the missing vdev with the data we were 1720 * able to obtain from the MOS config. 1721 */ 1722 vdev_remove_child(rvd, tvd); 1723 vdev_remove_child(mrvd, mtvd); 1724 1725 vdev_add_child(rvd, mtvd); 1726 vdev_add_child(mrvd, tvd); 1727 1728 spa_config_exit(spa, SCL_ALL, FTAG); 1729 vdev_load(mtvd); 1730 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1731 1732 vdev_reopen(rvd); 1733 } else if (mtvd->vdev_islog) { 1734 /* 1735 * Load the slog device's state from the MOS config 1736 * since it's possible that the label does not 1737 * contain the most up-to-date information. 1738 */ 1739 vdev_load_log_state(tvd, mtvd); 1740 vdev_reopen(tvd); 1741 } 1742 } 1743 vdev_free(mrvd); 1744 spa_config_exit(spa, SCL_ALL, FTAG); 1745 1746 /* 1747 * Ensure we were able to validate the config. 1748 */ 1749 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); 1750} 1751 1752/* 1753 * Check for missing log devices 1754 */ 1755static boolean_t 1756spa_check_logs(spa_t *spa) 1757{ 1758 boolean_t rv = B_FALSE; 1759 1760 switch (spa->spa_log_state) { 1761 case SPA_LOG_MISSING: 1762 /* need to recheck in case slog has been restored */ 1763 case SPA_LOG_UNKNOWN: 1764 rv = (dmu_objset_find(spa->spa_name, zil_check_log_chain, 1765 NULL, DS_FIND_CHILDREN) != 0); 1766 if (rv) 1767 spa_set_log_state(spa, SPA_LOG_MISSING); 1768 break; 1769 } 1770 return (rv); 1771} 1772 1773static boolean_t 1774spa_passivate_log(spa_t *spa) 1775{ 1776 vdev_t *rvd = spa->spa_root_vdev; 1777 boolean_t slog_found = B_FALSE; 1778 1779 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1780 1781 if (!spa_has_slogs(spa)) 1782 return (B_FALSE); 1783 1784 for (int c = 0; c < rvd->vdev_children; c++) { 1785 vdev_t *tvd = rvd->vdev_child[c]; 1786 metaslab_group_t *mg = tvd->vdev_mg; 1787 1788 if (tvd->vdev_islog) { 1789 metaslab_group_passivate(mg); 1790 slog_found = B_TRUE; 1791 } 1792 } 1793 1794 return (slog_found); 1795} 1796 1797static void 1798spa_activate_log(spa_t *spa) 1799{ 1800 vdev_t *rvd = spa->spa_root_vdev; 1801 1802 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1803 1804 for (int c = 0; c < rvd->vdev_children; c++) { 1805 vdev_t *tvd = rvd->vdev_child[c]; 1806 metaslab_group_t *mg = tvd->vdev_mg; 1807 1808 if (tvd->vdev_islog) 1809 metaslab_group_activate(mg); 1810 } 1811} 1812 1813int 1814spa_offline_log(spa_t *spa) 1815{ 1816 int error; 1817 1818 error = dmu_objset_find(spa_name(spa), zil_vdev_offline, 1819 NULL, DS_FIND_CHILDREN); 1820 if (error == 0) { 1821 /* 1822 * We successfully offlined the log device, sync out the 1823 * current txg so that the "stubby" block can be removed 1824 * by zil_sync(). 1825 */ 1826 txg_wait_synced(spa->spa_dsl_pool, 0); 1827 } 1828 return (error); 1829} 1830 1831static void 1832spa_aux_check_removed(spa_aux_vdev_t *sav) 1833{ 1834 int i; 1835 1836 for (i = 0; i < sav->sav_count; i++) 1837 spa_check_removed(sav->sav_vdevs[i]); 1838} 1839 1840void 1841spa_claim_notify(zio_t *zio) 1842{ 1843 spa_t *spa = zio->io_spa; 1844 1845 if (zio->io_error) 1846 return; 1847 1848 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1849 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1850 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1851 mutex_exit(&spa->spa_props_lock); 1852} 1853 1854typedef struct spa_load_error { 1855 uint64_t sle_meta_count; 1856 uint64_t sle_data_count; 1857} spa_load_error_t; 1858 1859static void 1860spa_load_verify_done(zio_t *zio) 1861{ 1862 blkptr_t *bp = zio->io_bp; 1863 spa_load_error_t *sle = zio->io_private; 1864 dmu_object_type_t type = BP_GET_TYPE(bp); 1865 int error = zio->io_error; 1866 1867 if (error) { 1868 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 1869 type != DMU_OT_INTENT_LOG) 1870 atomic_add_64(&sle->sle_meta_count, 1); 1871 else 1872 atomic_add_64(&sle->sle_data_count, 1); 1873 } 1874 zio_data_buf_free(zio->io_data, zio->io_size); 1875} 1876 1877/*ARGSUSED*/ 1878static int 1879spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1880 const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg) 1881{ 1882 if (bp != NULL) { 1883 zio_t *rio = arg; 1884 size_t size = BP_GET_PSIZE(bp); 1885 void *data = zio_data_buf_alloc(size); 1886 1887 zio_nowait(zio_read(rio, spa, bp, data, size, 1888 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 1889 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 1890 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 1891 } 1892 return (0); 1893} 1894 1895static int 1896spa_load_verify(spa_t *spa) 1897{ 1898 zio_t *rio; 1899 spa_load_error_t sle = { 0 }; 1900 zpool_rewind_policy_t policy; 1901 boolean_t verify_ok = B_FALSE; 1902 int error; 1903 1904 zpool_get_rewind_policy(spa->spa_config, &policy); 1905 1906 if (policy.zrp_request & ZPOOL_NEVER_REWIND) 1907 return (0); 1908 1909 rio = zio_root(spa, NULL, &sle, 1910 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1911 1912 error = traverse_pool(spa, spa->spa_verify_min_txg, 1913 TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio); 1914 1915 (void) zio_wait(rio); 1916 1917 spa->spa_load_meta_errors = sle.sle_meta_count; 1918 spa->spa_load_data_errors = sle.sle_data_count; 1919 1920 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && 1921 sle.sle_data_count <= policy.zrp_maxdata) { 1922 int64_t loss = 0; 1923 1924 verify_ok = B_TRUE; 1925 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 1926 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 1927 1928 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 1929 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1930 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 1931 VERIFY(nvlist_add_int64(spa->spa_load_info, 1932 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 1933 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1934 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 1935 } else { 1936 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 1937 } 1938 1939 if (error) { 1940 if (error != ENXIO && error != EIO) 1941 error = SET_ERROR(EIO); 1942 return (error); 1943 } 1944 1945 return (verify_ok ? 0 : EIO); 1946} 1947 1948/* 1949 * Find a value in the pool props object. 1950 */ 1951static void 1952spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 1953{ 1954 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 1955 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 1956} 1957 1958/* 1959 * Find a value in the pool directory object. 1960 */ 1961static int 1962spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) 1963{ 1964 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 1965 name, sizeof (uint64_t), 1, val)); 1966} 1967 1968static int 1969spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 1970{ 1971 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 1972 return (err); 1973} 1974 1975/* 1976 * Fix up config after a partly-completed split. This is done with the 1977 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 1978 * pool have that entry in their config, but only the splitting one contains 1979 * a list of all the guids of the vdevs that are being split off. 1980 * 1981 * This function determines what to do with that list: either rejoin 1982 * all the disks to the pool, or complete the splitting process. To attempt 1983 * the rejoin, each disk that is offlined is marked online again, and 1984 * we do a reopen() call. If the vdev label for every disk that was 1985 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 1986 * then we call vdev_split() on each disk, and complete the split. 1987 * 1988 * Otherwise we leave the config alone, with all the vdevs in place in 1989 * the original pool. 1990 */ 1991static void 1992spa_try_repair(spa_t *spa, nvlist_t *config) 1993{ 1994 uint_t extracted; 1995 uint64_t *glist; 1996 uint_t i, gcount; 1997 nvlist_t *nvl; 1998 vdev_t **vd; 1999 boolean_t attempt_reopen; 2000 2001 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2002 return; 2003 2004 /* check that the config is complete */ 2005 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2006 &glist, &gcount) != 0) 2007 return; 2008 2009 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2010 2011 /* attempt to online all the vdevs & validate */ 2012 attempt_reopen = B_TRUE; 2013 for (i = 0; i < gcount; i++) { 2014 if (glist[i] == 0) /* vdev is hole */ 2015 continue; 2016 2017 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2018 if (vd[i] == NULL) { 2019 /* 2020 * Don't bother attempting to reopen the disks; 2021 * just do the split. 2022 */ 2023 attempt_reopen = B_FALSE; 2024 } else { 2025 /* attempt to re-online it */ 2026 vd[i]->vdev_offline = B_FALSE; 2027 } 2028 } 2029 2030 if (attempt_reopen) { 2031 vdev_reopen(spa->spa_root_vdev); 2032 2033 /* check each device to see what state it's in */ 2034 for (extracted = 0, i = 0; i < gcount; i++) { 2035 if (vd[i] != NULL && 2036 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2037 break; 2038 ++extracted; 2039 } 2040 } 2041 2042 /* 2043 * If every disk has been moved to the new pool, or if we never 2044 * even attempted to look at them, then we split them off for 2045 * good. 2046 */ 2047 if (!attempt_reopen || gcount == extracted) { 2048 for (i = 0; i < gcount; i++) 2049 if (vd[i] != NULL) 2050 vdev_split(vd[i]); 2051 vdev_reopen(spa->spa_root_vdev); 2052 } 2053 2054 kmem_free(vd, gcount * sizeof (vdev_t *)); 2055} 2056 2057static int 2058spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, 2059 boolean_t mosconfig) 2060{ 2061 nvlist_t *config = spa->spa_config; 2062 char *ereport = FM_EREPORT_ZFS_POOL; 2063 char *comment; 2064 int error; 2065 uint64_t pool_guid; 2066 nvlist_t *nvl; 2067 2068 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) 2069 return (SET_ERROR(EINVAL)); 2070 2071 ASSERT(spa->spa_comment == NULL); 2072 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2073 spa->spa_comment = spa_strdup(comment); 2074 2075 /* 2076 * Versioning wasn't explicitly added to the label until later, so if 2077 * it's not present treat it as the initial version. 2078 */ 2079 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2080 &spa->spa_ubsync.ub_version) != 0) 2081 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2082 2083 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2084 &spa->spa_config_txg); 2085 2086 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && 2087 spa_guid_exists(pool_guid, 0)) { 2088 error = SET_ERROR(EEXIST); 2089 } else { 2090 spa->spa_config_guid = pool_guid; 2091 2092 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, 2093 &nvl) == 0) { 2094 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, 2095 KM_SLEEP) == 0); 2096 } 2097 2098 nvlist_free(spa->spa_load_info); 2099 spa->spa_load_info = fnvlist_alloc(); 2100 2101 gethrestime(&spa->spa_loaded_ts); 2102 error = spa_load_impl(spa, pool_guid, config, state, type, 2103 mosconfig, &ereport); 2104 } 2105 2106 spa->spa_minref = refcount_count(&spa->spa_refcount); 2107 if (error) { 2108 if (error != EEXIST) { 2109 spa->spa_loaded_ts.tv_sec = 0; 2110 spa->spa_loaded_ts.tv_nsec = 0; 2111 } 2112 if (error != EBADF) { 2113 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); 2114 } 2115 } 2116 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2117 spa->spa_ena = 0; 2118 2119 return (error); 2120} 2121 2122/* 2123 * Load an existing storage pool, using the pool's builtin spa_config as a 2124 * source of configuration information. 2125 */ 2126static int 2127spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, 2128 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 2129 char **ereport) 2130{ 2131 int error = 0; 2132 nvlist_t *nvroot = NULL; 2133 nvlist_t *label; 2134 vdev_t *rvd; 2135 uberblock_t *ub = &spa->spa_uberblock; 2136 uint64_t children, config_cache_txg = spa->spa_config_txg; 2137 int orig_mode = spa->spa_mode; 2138 int parse; 2139 uint64_t obj; 2140 boolean_t missing_feat_write = B_FALSE; 2141 2142 /* 2143 * If this is an untrusted config, access the pool in read-only mode. 2144 * This prevents things like resilvering recently removed devices. 2145 */ 2146 if (!mosconfig) 2147 spa->spa_mode = FREAD; 2148 2149 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2150 2151 spa->spa_load_state = state; 2152 2153 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) 2154 return (SET_ERROR(EINVAL)); 2155 2156 parse = (type == SPA_IMPORT_EXISTING ? 2157 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2158 2159 /* 2160 * Create "The Godfather" zio to hold all async IOs 2161 */ 2162 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 2163 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 2164 2165 /* 2166 * Parse the configuration into a vdev tree. We explicitly set the 2167 * value that will be returned by spa_version() since parsing the 2168 * configuration requires knowing the version number. 2169 */ 2170 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2171 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); 2172 spa_config_exit(spa, SCL_ALL, FTAG); 2173 2174 if (error != 0) 2175 return (error); 2176 2177 ASSERT(spa->spa_root_vdev == rvd); 2178 2179 if (type != SPA_IMPORT_ASSEMBLE) { 2180 ASSERT(spa_guid(spa) == pool_guid); 2181 } 2182 2183 /* 2184 * Try to open all vdevs, loading each label in the process. 2185 */ 2186 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2187 error = vdev_open(rvd); 2188 spa_config_exit(spa, SCL_ALL, FTAG); 2189 if (error != 0) 2190 return (error); 2191 2192 /* 2193 * We need to validate the vdev labels against the configuration that 2194 * we have in hand, which is dependent on the setting of mosconfig. If 2195 * mosconfig is true then we're validating the vdev labels based on 2196 * that config. Otherwise, we're validating against the cached config 2197 * (zpool.cache) that was read when we loaded the zfs module, and then 2198 * later we will recursively call spa_load() and validate against 2199 * the vdev config. 2200 * 2201 * If we're assembling a new pool that's been split off from an 2202 * existing pool, the labels haven't yet been updated so we skip 2203 * validation for now. 2204 */ 2205 if (type != SPA_IMPORT_ASSEMBLE) { 2206 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2207 error = vdev_validate(rvd, mosconfig); 2208 spa_config_exit(spa, SCL_ALL, FTAG); 2209 2210 if (error != 0) 2211 return (error); 2212 2213 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2214 return (SET_ERROR(ENXIO)); 2215 } 2216 2217 /* 2218 * Find the best uberblock. 2219 */ 2220 vdev_uberblock_load(rvd, ub, &label); 2221 2222 /* 2223 * If we weren't able to find a single valid uberblock, return failure. 2224 */ 2225 if (ub->ub_txg == 0) { 2226 nvlist_free(label); 2227 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2228 } 2229 2230 /* 2231 * If the pool has an unsupported version we can't open it. 2232 */ 2233 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2234 nvlist_free(label); 2235 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2236 } 2237 2238 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2239 nvlist_t *features; 2240 2241 /* 2242 * If we weren't able to find what's necessary for reading the 2243 * MOS in the label, return failure. 2244 */ 2245 if (label == NULL || nvlist_lookup_nvlist(label, 2246 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { 2247 nvlist_free(label); 2248 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2249 ENXIO)); 2250 } 2251 2252 /* 2253 * Update our in-core representation with the definitive values 2254 * from the label. 2255 */ 2256 nvlist_free(spa->spa_label_features); 2257 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2258 } 2259 2260 nvlist_free(label); 2261 2262 /* 2263 * Look through entries in the label nvlist's features_for_read. If 2264 * there is a feature listed there which we don't understand then we 2265 * cannot open a pool. 2266 */ 2267 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2268 nvlist_t *unsup_feat; 2269 2270 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2271 0); 2272 2273 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2274 NULL); nvp != NULL; 2275 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2276 if (!zfeature_is_supported(nvpair_name(nvp))) { 2277 VERIFY(nvlist_add_string(unsup_feat, 2278 nvpair_name(nvp), "") == 0); 2279 } 2280 } 2281 2282 if (!nvlist_empty(unsup_feat)) { 2283 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2284 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2285 nvlist_free(unsup_feat); 2286 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2287 ENOTSUP)); 2288 } 2289 2290 nvlist_free(unsup_feat); 2291 } 2292 2293 /* 2294 * If the vdev guid sum doesn't match the uberblock, we have an 2295 * incomplete configuration. We first check to see if the pool 2296 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). 2297 * If it is, defer the vdev_guid_sum check till later so we 2298 * can handle missing vdevs. 2299 */ 2300 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, 2301 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && 2302 rvd->vdev_guid_sum != ub->ub_guid_sum) 2303 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 2304 2305 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2306 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2307 spa_try_repair(spa, config); 2308 spa_config_exit(spa, SCL_ALL, FTAG); 2309 nvlist_free(spa->spa_config_splitting); 2310 spa->spa_config_splitting = NULL; 2311 } 2312 2313 /* 2314 * Initialize internal SPA structures. 2315 */ 2316 spa->spa_state = POOL_STATE_ACTIVE; 2317 spa->spa_ubsync = spa->spa_uberblock; 2318 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2319 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2320 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2321 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2322 spa->spa_claim_max_txg = spa->spa_first_txg; 2323 spa->spa_prev_software_version = ub->ub_software_version; 2324 2325 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2326 if (error) 2327 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2328 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2329 2330 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) 2331 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2332 2333 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 2334 boolean_t missing_feat_read = B_FALSE; 2335 nvlist_t *unsup_feat, *enabled_feat; 2336 2337 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 2338 &spa->spa_feat_for_read_obj) != 0) { 2339 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2340 } 2341 2342 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 2343 &spa->spa_feat_for_write_obj) != 0) { 2344 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2345 } 2346 2347 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 2348 &spa->spa_feat_desc_obj) != 0) { 2349 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2350 } 2351 2352 enabled_feat = fnvlist_alloc(); 2353 unsup_feat = fnvlist_alloc(); 2354 2355 if (!spa_features_check(spa, B_FALSE, 2356 unsup_feat, enabled_feat)) 2357 missing_feat_read = B_TRUE; 2358 2359 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { 2360 if (!spa_features_check(spa, B_TRUE, 2361 unsup_feat, enabled_feat)) { 2362 missing_feat_write = B_TRUE; 2363 } 2364 } 2365 2366 fnvlist_add_nvlist(spa->spa_load_info, 2367 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 2368 2369 if (!nvlist_empty(unsup_feat)) { 2370 fnvlist_add_nvlist(spa->spa_load_info, 2371 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 2372 } 2373 2374 fnvlist_free(enabled_feat); 2375 fnvlist_free(unsup_feat); 2376 2377 if (!missing_feat_read) { 2378 fnvlist_add_boolean(spa->spa_load_info, 2379 ZPOOL_CONFIG_CAN_RDONLY); 2380 } 2381 2382 /* 2383 * If the state is SPA_LOAD_TRYIMPORT, our objective is 2384 * twofold: to determine whether the pool is available for 2385 * import in read-write mode and (if it is not) whether the 2386 * pool is available for import in read-only mode. If the pool 2387 * is available for import in read-write mode, it is displayed 2388 * as available in userland; if it is not available for import 2389 * in read-only mode, it is displayed as unavailable in 2390 * userland. If the pool is available for import in read-only 2391 * mode but not read-write mode, it is displayed as unavailable 2392 * in userland with a special note that the pool is actually 2393 * available for open in read-only mode. 2394 * 2395 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 2396 * missing a feature for write, we must first determine whether 2397 * the pool can be opened read-only before returning to 2398 * userland in order to know whether to display the 2399 * abovementioned note. 2400 */ 2401 if (missing_feat_read || (missing_feat_write && 2402 spa_writeable(spa))) { 2403 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2404 ENOTSUP)); 2405 } 2406 } 2407 2408 spa->spa_is_initializing = B_TRUE; 2409 error = dsl_pool_open(spa->spa_dsl_pool); 2410 spa->spa_is_initializing = B_FALSE; 2411 if (error != 0) 2412 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2413 2414 if (!mosconfig) { 2415 uint64_t hostid; 2416 nvlist_t *policy = NULL, *nvconfig; 2417 2418 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2419 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2420 2421 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, 2422 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2423 char *hostname; 2424 unsigned long myhostid = 0; 2425 2426 VERIFY(nvlist_lookup_string(nvconfig, 2427 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); 2428 2429#ifdef _KERNEL 2430 myhostid = zone_get_hostid(NULL); 2431#else /* _KERNEL */ 2432 /* 2433 * We're emulating the system's hostid in userland, so 2434 * we can't use zone_get_hostid(). 2435 */ 2436 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); 2437#endif /* _KERNEL */ 2438 if (check_hostid && hostid != 0 && myhostid != 0 && 2439 hostid != myhostid) { 2440 nvlist_free(nvconfig); 2441 cmn_err(CE_WARN, "pool '%s' could not be " 2442 "loaded as it was last accessed by " 2443 "another system (host: %s hostid: 0x%lx). " 2444 "See: http://illumos.org/msg/ZFS-8000-EY", 2445 spa_name(spa), hostname, 2446 (unsigned long)hostid); 2447 return (SET_ERROR(EBADF)); 2448 } 2449 } 2450 if (nvlist_lookup_nvlist(spa->spa_config, 2451 ZPOOL_REWIND_POLICY, &policy) == 0) 2452 VERIFY(nvlist_add_nvlist(nvconfig, 2453 ZPOOL_REWIND_POLICY, policy) == 0); 2454 2455 spa_config_set(spa, nvconfig); 2456 spa_unload(spa); 2457 spa_deactivate(spa); 2458 spa_activate(spa, orig_mode); 2459 2460 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); 2461 } 2462 2463 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) 2464 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2465 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 2466 if (error != 0) 2467 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2468 2469 /* 2470 * Load the bit that tells us to use the new accounting function 2471 * (raid-z deflation). If we have an older pool, this will not 2472 * be present. 2473 */ 2474 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); 2475 if (error != 0 && error != ENOENT) 2476 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2477 2478 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 2479 &spa->spa_creation_version); 2480 if (error != 0 && error != ENOENT) 2481 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2482 2483 /* 2484 * Load the persistent error log. If we have an older pool, this will 2485 * not be present. 2486 */ 2487 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); 2488 if (error != 0 && error != ENOENT) 2489 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2490 2491 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 2492 &spa->spa_errlog_scrub); 2493 if (error != 0 && error != ENOENT) 2494 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2495 2496 /* 2497 * Load the history object. If we have an older pool, this 2498 * will not be present. 2499 */ 2500 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); 2501 if (error != 0 && error != ENOENT) 2502 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2503 2504 /* 2505 * If we're assembling the pool from the split-off vdevs of 2506 * an existing pool, we don't want to attach the spares & cache 2507 * devices. 2508 */ 2509 2510 /* 2511 * Load any hot spares for this pool. 2512 */ 2513 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); 2514 if (error != 0 && error != ENOENT) 2515 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2516 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2517 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 2518 if (load_nvlist(spa, spa->spa_spares.sav_object, 2519 &spa->spa_spares.sav_config) != 0) 2520 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2521 2522 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2523 spa_load_spares(spa); 2524 spa_config_exit(spa, SCL_ALL, FTAG); 2525 } else if (error == 0) { 2526 spa->spa_spares.sav_sync = B_TRUE; 2527 } 2528 2529 /* 2530 * Load any level 2 ARC devices for this pool. 2531 */ 2532 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 2533 &spa->spa_l2cache.sav_object); 2534 if (error != 0 && error != ENOENT) 2535 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2536 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2537 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 2538 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 2539 &spa->spa_l2cache.sav_config) != 0) 2540 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2541 2542 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2543 spa_load_l2cache(spa); 2544 spa_config_exit(spa, SCL_ALL, FTAG); 2545 } else if (error == 0) { 2546 spa->spa_l2cache.sav_sync = B_TRUE; 2547 } 2548 2549 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 2550 2551 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); 2552 if (error && error != ENOENT) 2553 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2554 2555 if (error == 0) { 2556 uint64_t autoreplace; 2557 2558 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 2559 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 2560 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 2561 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 2562 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 2563 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 2564 &spa->spa_dedup_ditto); 2565 2566 spa->spa_autoreplace = (autoreplace != 0); 2567 } 2568 2569 /* 2570 * If the 'autoreplace' property is set, then post a resource notifying 2571 * the ZFS DE that it should not issue any faults for unopenable 2572 * devices. We also iterate over the vdevs, and post a sysevent for any 2573 * unopenable vdevs so that the normal autoreplace handler can take 2574 * over. 2575 */ 2576 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { 2577 spa_check_removed(spa->spa_root_vdev); 2578 /* 2579 * For the import case, this is done in spa_import(), because 2580 * at this point we're using the spare definitions from 2581 * the MOS config, not necessarily from the userland config. 2582 */ 2583 if (state != SPA_LOAD_IMPORT) { 2584 spa_aux_check_removed(&spa->spa_spares); 2585 spa_aux_check_removed(&spa->spa_l2cache); 2586 } 2587 } 2588 2589 /* 2590 * Load the vdev state for all toplevel vdevs. 2591 */ 2592 vdev_load(rvd); 2593 2594 /* 2595 * Propagate the leaf DTLs we just loaded all the way up the tree. 2596 */ 2597 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2598 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 2599 spa_config_exit(spa, SCL_ALL, FTAG); 2600 2601 /* 2602 * Load the DDTs (dedup tables). 2603 */ 2604 error = ddt_load(spa); 2605 if (error != 0) 2606 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2607 2608 spa_update_dspace(spa); 2609 2610 /* 2611 * Validate the config, using the MOS config to fill in any 2612 * information which might be missing. If we fail to validate 2613 * the config then declare the pool unfit for use. If we're 2614 * assembling a pool from a split, the log is not transferred 2615 * over. 2616 */ 2617 if (type != SPA_IMPORT_ASSEMBLE) { 2618 nvlist_t *nvconfig; 2619 2620 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2621 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2622 2623 if (!spa_config_valid(spa, nvconfig)) { 2624 nvlist_free(nvconfig); 2625 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 2626 ENXIO)); 2627 } 2628 nvlist_free(nvconfig); 2629 2630 /* 2631 * Now that we've validated the config, check the state of the 2632 * root vdev. If it can't be opened, it indicates one or 2633 * more toplevel vdevs are faulted. 2634 */ 2635 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2636 return (SET_ERROR(ENXIO)); 2637 2638 if (spa_check_logs(spa)) { 2639 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 2640 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); 2641 } 2642 } 2643 2644 if (missing_feat_write) { 2645 ASSERT(state == SPA_LOAD_TRYIMPORT); 2646 2647 /* 2648 * At this point, we know that we can open the pool in 2649 * read-only mode but not read-write mode. We now have enough 2650 * information and can return to userland. 2651 */ 2652 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); 2653 } 2654 2655 /* 2656 * We've successfully opened the pool, verify that we're ready 2657 * to start pushing transactions. 2658 */ 2659 if (state != SPA_LOAD_TRYIMPORT) { 2660 if (error = spa_load_verify(spa)) 2661 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2662 error)); 2663 } 2664 2665 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || 2666 spa->spa_load_max_txg == UINT64_MAX)) { 2667 dmu_tx_t *tx; 2668 int need_update = B_FALSE; 2669 2670 ASSERT(state != SPA_LOAD_TRYIMPORT); 2671 2672 /* 2673 * Claim log blocks that haven't been committed yet. 2674 * This must all happen in a single txg. 2675 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 2676 * invoked from zil_claim_log_block()'s i/o done callback. 2677 * Price of rollback is that we abandon the log. 2678 */ 2679 spa->spa_claiming = B_TRUE; 2680 2681 tx = dmu_tx_create_assigned(spa_get_dsl(spa), 2682 spa_first_txg(spa)); 2683 (void) dmu_objset_find(spa_name(spa), 2684 zil_claim, tx, DS_FIND_CHILDREN); 2685 dmu_tx_commit(tx); 2686 2687 spa->spa_claiming = B_FALSE; 2688 2689 spa_set_log_state(spa, SPA_LOG_GOOD); 2690 spa->spa_sync_on = B_TRUE; 2691 txg_sync_start(spa->spa_dsl_pool); 2692 2693 /* 2694 * Wait for all claims to sync. We sync up to the highest 2695 * claimed log block birth time so that claimed log blocks 2696 * don't appear to be from the future. spa_claim_max_txg 2697 * will have been set for us by either zil_check_log_chain() 2698 * (invoked from spa_check_logs()) or zil_claim() above. 2699 */ 2700 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 2701 2702 /* 2703 * If the config cache is stale, or we have uninitialized 2704 * metaslabs (see spa_vdev_add()), then update the config. 2705 * 2706 * If this is a verbatim import, trust the current 2707 * in-core spa_config and update the disk labels. 2708 */ 2709 if (config_cache_txg != spa->spa_config_txg || 2710 state == SPA_LOAD_IMPORT || 2711 state == SPA_LOAD_RECOVER || 2712 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 2713 need_update = B_TRUE; 2714 2715 for (int c = 0; c < rvd->vdev_children; c++) 2716 if (rvd->vdev_child[c]->vdev_ms_array == 0) 2717 need_update = B_TRUE; 2718 2719 /* 2720 * Update the config cache asychronously in case we're the 2721 * root pool, in which case the config cache isn't writable yet. 2722 */ 2723 if (need_update) 2724 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2725 2726 /* 2727 * Check all DTLs to see if anything needs resilvering. 2728 */ 2729 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 2730 vdev_resilver_needed(rvd, NULL, NULL)) 2731 spa_async_request(spa, SPA_ASYNC_RESILVER); 2732 2733 /* 2734 * Log the fact that we booted up (so that we can detect if 2735 * we rebooted in the middle of an operation). 2736 */ 2737 spa_history_log_version(spa, "open"); 2738 2739 /* 2740 * Delete any inconsistent datasets. 2741 */ 2742 (void) dmu_objset_find(spa_name(spa), 2743 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 2744 2745 /* 2746 * Clean up any stale temporary dataset userrefs. 2747 */ 2748 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 2749 } 2750 2751 return (0); 2752} 2753 2754static int 2755spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) 2756{ 2757 int mode = spa->spa_mode; 2758 2759 spa_unload(spa); 2760 spa_deactivate(spa); 2761 2762 spa->spa_load_max_txg--; 2763 2764 spa_activate(spa, mode); 2765 spa_async_suspend(spa); 2766 2767 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); 2768} 2769 2770/* 2771 * If spa_load() fails this function will try loading prior txg's. If 2772 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 2773 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 2774 * function will not rewind the pool and will return the same error as 2775 * spa_load(). 2776 */ 2777static int 2778spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, 2779 uint64_t max_request, int rewind_flags) 2780{ 2781 nvlist_t *loadinfo = NULL; 2782 nvlist_t *config = NULL; 2783 int load_error, rewind_error; 2784 uint64_t safe_rewind_txg; 2785 uint64_t min_txg; 2786 2787 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 2788 spa->spa_load_max_txg = spa->spa_load_txg; 2789 spa_set_log_state(spa, SPA_LOG_CLEAR); 2790 } else { 2791 spa->spa_load_max_txg = max_request; 2792 } 2793 2794 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, 2795 mosconfig); 2796 if (load_error == 0) 2797 return (0); 2798 2799 if (spa->spa_root_vdev != NULL) 2800 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2801 2802 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 2803 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 2804 2805 if (rewind_flags & ZPOOL_NEVER_REWIND) { 2806 nvlist_free(config); 2807 return (load_error); 2808 } 2809 2810 if (state == SPA_LOAD_RECOVER) { 2811 /* Price of rolling back is discarding txgs, including log */ 2812 spa_set_log_state(spa, SPA_LOG_CLEAR); 2813 } else { 2814 /* 2815 * If we aren't rolling back save the load info from our first 2816 * import attempt so that we can restore it after attempting 2817 * to rewind. 2818 */ 2819 loadinfo = spa->spa_load_info; 2820 spa->spa_load_info = fnvlist_alloc(); 2821 } 2822 2823 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 2824 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 2825 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 2826 TXG_INITIAL : safe_rewind_txg; 2827 2828 /* 2829 * Continue as long as we're finding errors, we're still within 2830 * the acceptable rewind range, and we're still finding uberblocks 2831 */ 2832 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 2833 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 2834 if (spa->spa_load_max_txg < safe_rewind_txg) 2835 spa->spa_extreme_rewind = B_TRUE; 2836 rewind_error = spa_load_retry(spa, state, mosconfig); 2837 } 2838 2839 spa->spa_extreme_rewind = B_FALSE; 2840 spa->spa_load_max_txg = UINT64_MAX; 2841 2842 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 2843 spa_config_set(spa, config); 2844 2845 if (state == SPA_LOAD_RECOVER) { 2846 ASSERT3P(loadinfo, ==, NULL); 2847 return (rewind_error); 2848 } else { 2849 /* Store the rewind info as part of the initial load info */ 2850 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 2851 spa->spa_load_info); 2852 2853 /* Restore the initial load info */ 2854 fnvlist_free(spa->spa_load_info); 2855 spa->spa_load_info = loadinfo; 2856 2857 return (load_error); 2858 } 2859} 2860 2861/* 2862 * Pool Open/Import 2863 * 2864 * The import case is identical to an open except that the configuration is sent 2865 * down from userland, instead of grabbed from the configuration cache. For the 2866 * case of an open, the pool configuration will exist in the 2867 * POOL_STATE_UNINITIALIZED state. 2868 * 2869 * The stats information (gen/count/ustats) is used to gather vdev statistics at 2870 * the same time open the pool, without having to keep around the spa_t in some 2871 * ambiguous state. 2872 */ 2873static int 2874spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 2875 nvlist_t **config) 2876{ 2877 spa_t *spa; 2878 spa_load_state_t state = SPA_LOAD_OPEN; 2879 int error; 2880 int locked = B_FALSE; 2881 int firstopen = B_FALSE; 2882 2883 *spapp = NULL; 2884 2885 /* 2886 * As disgusting as this is, we need to support recursive calls to this 2887 * function because dsl_dir_open() is called during spa_load(), and ends 2888 * up calling spa_open() again. The real fix is to figure out how to 2889 * avoid dsl_dir_open() calling this in the first place. 2890 */ 2891 if (mutex_owner(&spa_namespace_lock) != curthread) { 2892 mutex_enter(&spa_namespace_lock); 2893 locked = B_TRUE; 2894 } 2895 2896 if ((spa = spa_lookup(pool)) == NULL) { 2897 if (locked) 2898 mutex_exit(&spa_namespace_lock); 2899 return (SET_ERROR(ENOENT)); 2900 } 2901 2902 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 2903 zpool_rewind_policy_t policy; 2904 2905 firstopen = B_TRUE; 2906 2907 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, 2908 &policy); 2909 if (policy.zrp_request & ZPOOL_DO_REWIND) 2910 state = SPA_LOAD_RECOVER; 2911 2912 spa_activate(spa, spa_mode_global); 2913 2914 if (state != SPA_LOAD_RECOVER) 2915 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 2916 2917 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, 2918 policy.zrp_request); 2919 2920 if (error == EBADF) { 2921 /* 2922 * If vdev_validate() returns failure (indicated by 2923 * EBADF), it indicates that one of the vdevs indicates 2924 * that the pool has been exported or destroyed. If 2925 * this is the case, the config cache is out of sync and 2926 * we should remove the pool from the namespace. 2927 */ 2928 spa_unload(spa); 2929 spa_deactivate(spa); 2930 spa_config_sync(spa, B_TRUE, B_TRUE); 2931 spa_remove(spa); 2932 if (locked) 2933 mutex_exit(&spa_namespace_lock); 2934 return (SET_ERROR(ENOENT)); 2935 } 2936 2937 if (error) { 2938 /* 2939 * We can't open the pool, but we still have useful 2940 * information: the state of each vdev after the 2941 * attempted vdev_open(). Return this to the user. 2942 */ 2943 if (config != NULL && spa->spa_config) { 2944 VERIFY(nvlist_dup(spa->spa_config, config, 2945 KM_SLEEP) == 0); 2946 VERIFY(nvlist_add_nvlist(*config, 2947 ZPOOL_CONFIG_LOAD_INFO, 2948 spa->spa_load_info) == 0); 2949 } 2950 spa_unload(spa); 2951 spa_deactivate(spa); 2952 spa->spa_last_open_failed = error; 2953 if (locked) 2954 mutex_exit(&spa_namespace_lock); 2955 *spapp = NULL; 2956 return (error); 2957 } 2958 } 2959 2960 spa_open_ref(spa, tag); 2961 2962 if (config != NULL) 2963 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2964 2965 /* 2966 * If we've recovered the pool, pass back any information we 2967 * gathered while doing the load. 2968 */ 2969 if (state == SPA_LOAD_RECOVER) { 2970 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 2971 spa->spa_load_info) == 0); 2972 } 2973 2974 if (locked) { 2975 spa->spa_last_open_failed = 0; 2976 spa->spa_last_ubsync_txg = 0; 2977 spa->spa_load_txg = 0; 2978 mutex_exit(&spa_namespace_lock); 2979#ifdef __FreeBSD__ 2980#ifdef _KERNEL 2981 if (firstopen) 2982 zvol_create_minors(spa->spa_name); 2983#endif 2984#endif 2985 } 2986 2987 *spapp = spa; 2988 2989 return (0); 2990} 2991 2992int 2993spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 2994 nvlist_t **config) 2995{ 2996 return (spa_open_common(name, spapp, tag, policy, config)); 2997} 2998 2999int 3000spa_open(const char *name, spa_t **spapp, void *tag) 3001{ 3002 return (spa_open_common(name, spapp, tag, NULL, NULL)); 3003} 3004 3005/* 3006 * Lookup the given spa_t, incrementing the inject count in the process, 3007 * preventing it from being exported or destroyed. 3008 */ 3009spa_t * 3010spa_inject_addref(char *name) 3011{ 3012 spa_t *spa; 3013 3014 mutex_enter(&spa_namespace_lock); 3015 if ((spa = spa_lookup(name)) == NULL) { 3016 mutex_exit(&spa_namespace_lock); 3017 return (NULL); 3018 } 3019 spa->spa_inject_ref++; 3020 mutex_exit(&spa_namespace_lock); 3021 3022 return (spa); 3023} 3024 3025void 3026spa_inject_delref(spa_t *spa) 3027{ 3028 mutex_enter(&spa_namespace_lock); 3029 spa->spa_inject_ref--; 3030 mutex_exit(&spa_namespace_lock); 3031} 3032 3033/* 3034 * Add spares device information to the nvlist. 3035 */ 3036static void 3037spa_add_spares(spa_t *spa, nvlist_t *config) 3038{ 3039 nvlist_t **spares; 3040 uint_t i, nspares; 3041 nvlist_t *nvroot; 3042 uint64_t guid; 3043 vdev_stat_t *vs; 3044 uint_t vsc; 3045 uint64_t pool; 3046 3047 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3048 3049 if (spa->spa_spares.sav_count == 0) 3050 return; 3051 3052 VERIFY(nvlist_lookup_nvlist(config, 3053 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3054 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 3055 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3056 if (nspares != 0) { 3057 VERIFY(nvlist_add_nvlist_array(nvroot, 3058 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3059 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3060 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3061 3062 /* 3063 * Go through and find any spares which have since been 3064 * repurposed as an active spare. If this is the case, update 3065 * their status appropriately. 3066 */ 3067 for (i = 0; i < nspares; i++) { 3068 VERIFY(nvlist_lookup_uint64(spares[i], 3069 ZPOOL_CONFIG_GUID, &guid) == 0); 3070 if (spa_spare_exists(guid, &pool, NULL) && 3071 pool != 0ULL) { 3072 VERIFY(nvlist_lookup_uint64_array( 3073 spares[i], ZPOOL_CONFIG_VDEV_STATS, 3074 (uint64_t **)&vs, &vsc) == 0); 3075 vs->vs_state = VDEV_STATE_CANT_OPEN; 3076 vs->vs_aux = VDEV_AUX_SPARED; 3077 } 3078 } 3079 } 3080} 3081 3082/* 3083 * Add l2cache device information to the nvlist, including vdev stats. 3084 */ 3085static void 3086spa_add_l2cache(spa_t *spa, nvlist_t *config) 3087{ 3088 nvlist_t **l2cache; 3089 uint_t i, j, nl2cache; 3090 nvlist_t *nvroot; 3091 uint64_t guid; 3092 vdev_t *vd; 3093 vdev_stat_t *vs; 3094 uint_t vsc; 3095 3096 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3097 3098 if (spa->spa_l2cache.sav_count == 0) 3099 return; 3100 3101 VERIFY(nvlist_lookup_nvlist(config, 3102 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3103 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 3104 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3105 if (nl2cache != 0) { 3106 VERIFY(nvlist_add_nvlist_array(nvroot, 3107 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3108 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3109 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3110 3111 /* 3112 * Update level 2 cache device stats. 3113 */ 3114 3115 for (i = 0; i < nl2cache; i++) { 3116 VERIFY(nvlist_lookup_uint64(l2cache[i], 3117 ZPOOL_CONFIG_GUID, &guid) == 0); 3118 3119 vd = NULL; 3120 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 3121 if (guid == 3122 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 3123 vd = spa->spa_l2cache.sav_vdevs[j]; 3124 break; 3125 } 3126 } 3127 ASSERT(vd != NULL); 3128 3129 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 3130 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 3131 == 0); 3132 vdev_get_stats(vd, vs); 3133 } 3134 } 3135} 3136 3137static void 3138spa_add_feature_stats(spa_t *spa, nvlist_t *config) 3139{ 3140 nvlist_t *features; 3141 zap_cursor_t zc; 3142 zap_attribute_t za; 3143 3144 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3145 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3146 3147 /* We may be unable to read features if pool is suspended. */ 3148 if (spa_suspended(spa)) 3149 goto out; 3150 3151 if (spa->spa_feat_for_read_obj != 0) { 3152 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3153 spa->spa_feat_for_read_obj); 3154 zap_cursor_retrieve(&zc, &za) == 0; 3155 zap_cursor_advance(&zc)) { 3156 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3157 za.za_num_integers == 1); 3158 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3159 za.za_first_integer)); 3160 } 3161 zap_cursor_fini(&zc); 3162 } 3163 3164 if (spa->spa_feat_for_write_obj != 0) { 3165 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3166 spa->spa_feat_for_write_obj); 3167 zap_cursor_retrieve(&zc, &za) == 0; 3168 zap_cursor_advance(&zc)) { 3169 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3170 za.za_num_integers == 1); 3171 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3172 za.za_first_integer)); 3173 } 3174 zap_cursor_fini(&zc); 3175 } 3176 3177out: 3178 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 3179 features) == 0); 3180 nvlist_free(features); 3181} 3182 3183int 3184spa_get_stats(const char *name, nvlist_t **config, 3185 char *altroot, size_t buflen) 3186{ 3187 int error; 3188 spa_t *spa; 3189 3190 *config = NULL; 3191 error = spa_open_common(name, &spa, FTAG, NULL, config); 3192 3193 if (spa != NULL) { 3194 /* 3195 * This still leaves a window of inconsistency where the spares 3196 * or l2cache devices could change and the config would be 3197 * self-inconsistent. 3198 */ 3199 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3200 3201 if (*config != NULL) { 3202 uint64_t loadtimes[2]; 3203 3204 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 3205 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 3206 VERIFY(nvlist_add_uint64_array(*config, 3207 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 3208 3209 VERIFY(nvlist_add_uint64(*config, 3210 ZPOOL_CONFIG_ERRCOUNT, 3211 spa_get_errlog_size(spa)) == 0); 3212 3213 if (spa_suspended(spa)) 3214 VERIFY(nvlist_add_uint64(*config, 3215 ZPOOL_CONFIG_SUSPENDED, 3216 spa->spa_failmode) == 0); 3217 3218 spa_add_spares(spa, *config); 3219 spa_add_l2cache(spa, *config); 3220 spa_add_feature_stats(spa, *config); 3221 } 3222 } 3223 3224 /* 3225 * We want to get the alternate root even for faulted pools, so we cheat 3226 * and call spa_lookup() directly. 3227 */ 3228 if (altroot) { 3229 if (spa == NULL) { 3230 mutex_enter(&spa_namespace_lock); 3231 spa = spa_lookup(name); 3232 if (spa) 3233 spa_altroot(spa, altroot, buflen); 3234 else 3235 altroot[0] = '\0'; 3236 spa = NULL; 3237 mutex_exit(&spa_namespace_lock); 3238 } else { 3239 spa_altroot(spa, altroot, buflen); 3240 } 3241 } 3242 3243 if (spa != NULL) { 3244 spa_config_exit(spa, SCL_CONFIG, FTAG); 3245 spa_close(spa, FTAG); 3246 } 3247 3248 return (error); 3249} 3250 3251/* 3252 * Validate that the auxiliary device array is well formed. We must have an 3253 * array of nvlists, each which describes a valid leaf vdev. If this is an 3254 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 3255 * specified, as long as they are well-formed. 3256 */ 3257static int 3258spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 3259 spa_aux_vdev_t *sav, const char *config, uint64_t version, 3260 vdev_labeltype_t label) 3261{ 3262 nvlist_t **dev; 3263 uint_t i, ndev; 3264 vdev_t *vd; 3265 int error; 3266 3267 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3268 3269 /* 3270 * It's acceptable to have no devs specified. 3271 */ 3272 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 3273 return (0); 3274 3275 if (ndev == 0) 3276 return (SET_ERROR(EINVAL)); 3277 3278 /* 3279 * Make sure the pool is formatted with a version that supports this 3280 * device type. 3281 */ 3282 if (spa_version(spa) < version) 3283 return (SET_ERROR(ENOTSUP)); 3284 3285 /* 3286 * Set the pending device list so we correctly handle device in-use 3287 * checking. 3288 */ 3289 sav->sav_pending = dev; 3290 sav->sav_npending = ndev; 3291 3292 for (i = 0; i < ndev; i++) { 3293 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 3294 mode)) != 0) 3295 goto out; 3296 3297 if (!vd->vdev_ops->vdev_op_leaf) { 3298 vdev_free(vd); 3299 error = SET_ERROR(EINVAL); 3300 goto out; 3301 } 3302 3303 /* 3304 * The L2ARC currently only supports disk devices in 3305 * kernel context. For user-level testing, we allow it. 3306 */ 3307#ifdef _KERNEL 3308 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && 3309 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { 3310 error = SET_ERROR(ENOTBLK); 3311 vdev_free(vd); 3312 goto out; 3313 } 3314#endif 3315 vd->vdev_top = vd; 3316 3317 if ((error = vdev_open(vd)) == 0 && 3318 (error = vdev_label_init(vd, crtxg, label)) == 0) { 3319 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 3320 vd->vdev_guid) == 0); 3321 } 3322 3323 vdev_free(vd); 3324 3325 if (error && 3326 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 3327 goto out; 3328 else 3329 error = 0; 3330 } 3331 3332out: 3333 sav->sav_pending = NULL; 3334 sav->sav_npending = 0; 3335 return (error); 3336} 3337 3338static int 3339spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 3340{ 3341 int error; 3342 3343 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3344 3345 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3346 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 3347 VDEV_LABEL_SPARE)) != 0) { 3348 return (error); 3349 } 3350 3351 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3352 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 3353 VDEV_LABEL_L2CACHE)); 3354} 3355 3356static void 3357spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 3358 const char *config) 3359{ 3360 int i; 3361 3362 if (sav->sav_config != NULL) { 3363 nvlist_t **olddevs; 3364 uint_t oldndevs; 3365 nvlist_t **newdevs; 3366 3367 /* 3368 * Generate new dev list by concatentating with the 3369 * current dev list. 3370 */ 3371 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 3372 &olddevs, &oldndevs) == 0); 3373 3374 newdevs = kmem_alloc(sizeof (void *) * 3375 (ndevs + oldndevs), KM_SLEEP); 3376 for (i = 0; i < oldndevs; i++) 3377 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 3378 KM_SLEEP) == 0); 3379 for (i = 0; i < ndevs; i++) 3380 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 3381 KM_SLEEP) == 0); 3382 3383 VERIFY(nvlist_remove(sav->sav_config, config, 3384 DATA_TYPE_NVLIST_ARRAY) == 0); 3385 3386 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 3387 config, newdevs, ndevs + oldndevs) == 0); 3388 for (i = 0; i < oldndevs + ndevs; i++) 3389 nvlist_free(newdevs[i]); 3390 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 3391 } else { 3392 /* 3393 * Generate a new dev list. 3394 */ 3395 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 3396 KM_SLEEP) == 0); 3397 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 3398 devs, ndevs) == 0); 3399 } 3400} 3401 3402/* 3403 * Stop and drop level 2 ARC devices 3404 */ 3405void 3406spa_l2cache_drop(spa_t *spa) 3407{ 3408 vdev_t *vd; 3409 int i; 3410 spa_aux_vdev_t *sav = &spa->spa_l2cache; 3411 3412 for (i = 0; i < sav->sav_count; i++) { 3413 uint64_t pool; 3414 3415 vd = sav->sav_vdevs[i]; 3416 ASSERT(vd != NULL); 3417 3418 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 3419 pool != 0ULL && l2arc_vdev_present(vd)) 3420 l2arc_remove_vdev(vd); 3421 } 3422} 3423 3424/* 3425 * Pool Creation 3426 */ 3427int 3428spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 3429 nvlist_t *zplprops) 3430{ 3431 spa_t *spa; 3432 char *altroot = NULL; 3433 vdev_t *rvd; 3434 dsl_pool_t *dp; 3435 dmu_tx_t *tx; 3436 int error = 0; 3437 uint64_t txg = TXG_INITIAL; 3438 nvlist_t **spares, **l2cache; 3439 uint_t nspares, nl2cache; 3440 uint64_t version, obj; 3441 boolean_t has_features; 3442 3443 /* 3444 * If this pool already exists, return failure. 3445 */ 3446 mutex_enter(&spa_namespace_lock); 3447 if (spa_lookup(pool) != NULL) { 3448 mutex_exit(&spa_namespace_lock); 3449 return (SET_ERROR(EEXIST)); 3450 } 3451 3452 /* 3453 * Allocate a new spa_t structure. 3454 */ 3455 (void) nvlist_lookup_string(props, 3456 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3457 spa = spa_add(pool, NULL, altroot); 3458 spa_activate(spa, spa_mode_global); 3459 3460 if (props && (error = spa_prop_validate(spa, props))) { 3461 spa_deactivate(spa); 3462 spa_remove(spa); 3463 mutex_exit(&spa_namespace_lock); 3464 return (error); 3465 } 3466 3467 has_features = B_FALSE; 3468 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 3469 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 3470 if (zpool_prop_feature(nvpair_name(elem))) 3471 has_features = B_TRUE; 3472 } 3473 3474 if (has_features || nvlist_lookup_uint64(props, 3475 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 3476 version = SPA_VERSION; 3477 } 3478 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 3479 3480 spa->spa_first_txg = txg; 3481 spa->spa_uberblock.ub_txg = txg - 1; 3482 spa->spa_uberblock.ub_version = version; 3483 spa->spa_ubsync = spa->spa_uberblock; 3484 3485 /* 3486 * Create "The Godfather" zio to hold all async IOs 3487 */ 3488 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 3489 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 3490 3491 /* 3492 * Create the root vdev. 3493 */ 3494 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3495 3496 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 3497 3498 ASSERT(error != 0 || rvd != NULL); 3499 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 3500 3501 if (error == 0 && !zfs_allocatable_devs(nvroot)) 3502 error = SET_ERROR(EINVAL); 3503 3504 if (error == 0 && 3505 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 3506 (error = spa_validate_aux(spa, nvroot, txg, 3507 VDEV_ALLOC_ADD)) == 0) { 3508 for (int c = 0; c < rvd->vdev_children; c++) { 3509 vdev_ashift_optimize(rvd->vdev_child[c]); 3510 vdev_metaslab_set_size(rvd->vdev_child[c]); 3511 vdev_expand(rvd->vdev_child[c], txg); 3512 } 3513 } 3514 3515 spa_config_exit(spa, SCL_ALL, FTAG); 3516 3517 if (error != 0) { 3518 spa_unload(spa); 3519 spa_deactivate(spa); 3520 spa_remove(spa); 3521 mutex_exit(&spa_namespace_lock); 3522 return (error); 3523 } 3524 3525 /* 3526 * Get the list of spares, if specified. 3527 */ 3528 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3529 &spares, &nspares) == 0) { 3530 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 3531 KM_SLEEP) == 0); 3532 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3533 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3534 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3535 spa_load_spares(spa); 3536 spa_config_exit(spa, SCL_ALL, FTAG); 3537 spa->spa_spares.sav_sync = B_TRUE; 3538 } 3539 3540 /* 3541 * Get the list of level 2 cache devices, if specified. 3542 */ 3543 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3544 &l2cache, &nl2cache) == 0) { 3545 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3546 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3547 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3548 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3549 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3550 spa_load_l2cache(spa); 3551 spa_config_exit(spa, SCL_ALL, FTAG); 3552 spa->spa_l2cache.sav_sync = B_TRUE; 3553 } 3554 3555 spa->spa_is_initializing = B_TRUE; 3556 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); 3557 spa->spa_meta_objset = dp->dp_meta_objset; 3558 spa->spa_is_initializing = B_FALSE; 3559 3560 /* 3561 * Create DDTs (dedup tables). 3562 */ 3563 ddt_create(spa); 3564 3565 spa_update_dspace(spa); 3566 3567 tx = dmu_tx_create_assigned(dp, txg); 3568 3569 /* 3570 * Create the pool config object. 3571 */ 3572 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 3573 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 3574 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 3575 3576 if (zap_add(spa->spa_meta_objset, 3577 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 3578 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 3579 cmn_err(CE_PANIC, "failed to add pool config"); 3580 } 3581 3582 if (spa_version(spa) >= SPA_VERSION_FEATURES) 3583 spa_feature_create_zap_objects(spa, tx); 3584 3585 if (zap_add(spa->spa_meta_objset, 3586 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 3587 sizeof (uint64_t), 1, &version, tx) != 0) { 3588 cmn_err(CE_PANIC, "failed to add pool version"); 3589 } 3590 3591 /* Newly created pools with the right version are always deflated. */ 3592 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 3593 spa->spa_deflate = TRUE; 3594 if (zap_add(spa->spa_meta_objset, 3595 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 3596 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 3597 cmn_err(CE_PANIC, "failed to add deflate"); 3598 } 3599 } 3600 3601 /* 3602 * Create the deferred-free bpobj. Turn off compression 3603 * because sync-to-convergence takes longer if the blocksize 3604 * keeps changing. 3605 */ 3606 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 3607 dmu_object_set_compress(spa->spa_meta_objset, obj, 3608 ZIO_COMPRESS_OFF, tx); 3609 if (zap_add(spa->spa_meta_objset, 3610 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 3611 sizeof (uint64_t), 1, &obj, tx) != 0) { 3612 cmn_err(CE_PANIC, "failed to add bpobj"); 3613 } 3614 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 3615 spa->spa_meta_objset, obj)); 3616 3617 /* 3618 * Create the pool's history object. 3619 */ 3620 if (version >= SPA_VERSION_ZPOOL_HISTORY) 3621 spa_history_create_obj(spa, tx); 3622 3623 /* 3624 * Set pool properties. 3625 */ 3626 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 3627 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3628 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 3629 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 3630 3631 if (props != NULL) { 3632 spa_configfile_set(spa, props, B_FALSE); 3633 spa_sync_props(props, tx); 3634 } 3635 3636 dmu_tx_commit(tx); 3637 3638 spa->spa_sync_on = B_TRUE; 3639 txg_sync_start(spa->spa_dsl_pool); 3640 3641 /* 3642 * We explicitly wait for the first transaction to complete so that our 3643 * bean counters are appropriately updated. 3644 */ 3645 txg_wait_synced(spa->spa_dsl_pool, txg); 3646 3647 spa_config_sync(spa, B_FALSE, B_TRUE); 3648 3649 spa_history_log_version(spa, "create"); 3650 3651 spa->spa_minref = refcount_count(&spa->spa_refcount); 3652 3653 mutex_exit(&spa_namespace_lock); 3654 3655 return (0); 3656} 3657 3658#ifdef _KERNEL 3659#if defined(sun) 3660/* 3661 * Get the root pool information from the root disk, then import the root pool 3662 * during the system boot up time. 3663 */ 3664extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 3665 3666static nvlist_t * 3667spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 3668{ 3669 nvlist_t *config; 3670 nvlist_t *nvtop, *nvroot; 3671 uint64_t pgid; 3672 3673 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 3674 return (NULL); 3675 3676 /* 3677 * Add this top-level vdev to the child array. 3678 */ 3679 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3680 &nvtop) == 0); 3681 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3682 &pgid) == 0); 3683 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 3684 3685 /* 3686 * Put this pool's top-level vdevs into a root vdev. 3687 */ 3688 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3689 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3690 VDEV_TYPE_ROOT) == 0); 3691 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3692 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3693 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3694 &nvtop, 1) == 0); 3695 3696 /* 3697 * Replace the existing vdev_tree with the new root vdev in 3698 * this pool's configuration (remove the old, add the new). 3699 */ 3700 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3701 nvlist_free(nvroot); 3702 return (config); 3703} 3704 3705/* 3706 * Walk the vdev tree and see if we can find a device with "better" 3707 * configuration. A configuration is "better" if the label on that 3708 * device has a more recent txg. 3709 */ 3710static void 3711spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 3712{ 3713 for (int c = 0; c < vd->vdev_children; c++) 3714 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 3715 3716 if (vd->vdev_ops->vdev_op_leaf) { 3717 nvlist_t *label; 3718 uint64_t label_txg; 3719 3720 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 3721 &label) != 0) 3722 return; 3723 3724 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 3725 &label_txg) == 0); 3726 3727 /* 3728 * Do we have a better boot device? 3729 */ 3730 if (label_txg > *txg) { 3731 *txg = label_txg; 3732 *avd = vd; 3733 } 3734 nvlist_free(label); 3735 } 3736} 3737 3738/* 3739 * Import a root pool. 3740 * 3741 * For x86. devpath_list will consist of devid and/or physpath name of 3742 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 3743 * The GRUB "findroot" command will return the vdev we should boot. 3744 * 3745 * For Sparc, devpath_list consists the physpath name of the booting device 3746 * no matter the rootpool is a single device pool or a mirrored pool. 3747 * e.g. 3748 * "/pci@1f,0/ide@d/disk@0,0:a" 3749 */ 3750int 3751spa_import_rootpool(char *devpath, char *devid) 3752{ 3753 spa_t *spa; 3754 vdev_t *rvd, *bvd, *avd = NULL; 3755 nvlist_t *config, *nvtop; 3756 uint64_t guid, txg; 3757 char *pname; 3758 int error; 3759 3760 /* 3761 * Read the label from the boot device and generate a configuration. 3762 */ 3763 config = spa_generate_rootconf(devpath, devid, &guid); 3764#if defined(_OBP) && defined(_KERNEL) 3765 if (config == NULL) { 3766 if (strstr(devpath, "/iscsi/ssd") != NULL) { 3767 /* iscsi boot */ 3768 get_iscsi_bootpath_phy(devpath); 3769 config = spa_generate_rootconf(devpath, devid, &guid); 3770 } 3771 } 3772#endif 3773 if (config == NULL) { 3774 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 3775 devpath); 3776 return (SET_ERROR(EIO)); 3777 } 3778 3779 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 3780 &pname) == 0); 3781 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 3782 3783 mutex_enter(&spa_namespace_lock); 3784 if ((spa = spa_lookup(pname)) != NULL) { 3785 /* 3786 * Remove the existing root pool from the namespace so that we 3787 * can replace it with the correct config we just read in. 3788 */ 3789 spa_remove(spa); 3790 } 3791 3792 spa = spa_add(pname, config, NULL); 3793 spa->spa_is_root = B_TRUE; 3794 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 3795 3796 /* 3797 * Build up a vdev tree based on the boot device's label config. 3798 */ 3799 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3800 &nvtop) == 0); 3801 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3802 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 3803 VDEV_ALLOC_ROOTPOOL); 3804 spa_config_exit(spa, SCL_ALL, FTAG); 3805 if (error) { 3806 mutex_exit(&spa_namespace_lock); 3807 nvlist_free(config); 3808 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 3809 pname); 3810 return (error); 3811 } 3812 3813 /* 3814 * Get the boot vdev. 3815 */ 3816 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 3817 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 3818 (u_longlong_t)guid); 3819 error = SET_ERROR(ENOENT); 3820 goto out; 3821 } 3822 3823 /* 3824 * Determine if there is a better boot device. 3825 */ 3826 avd = bvd; 3827 spa_alt_rootvdev(rvd, &avd, &txg); 3828 if (avd != bvd) { 3829 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 3830 "try booting from '%s'", avd->vdev_path); 3831 error = SET_ERROR(EINVAL); 3832 goto out; 3833 } 3834 3835 /* 3836 * If the boot device is part of a spare vdev then ensure that 3837 * we're booting off the active spare. 3838 */ 3839 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 3840 !bvd->vdev_isspare) { 3841 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 3842 "try booting from '%s'", 3843 bvd->vdev_parent-> 3844 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 3845 error = SET_ERROR(EINVAL); 3846 goto out; 3847 } 3848 3849 error = 0; 3850out: 3851 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3852 vdev_free(rvd); 3853 spa_config_exit(spa, SCL_ALL, FTAG); 3854 mutex_exit(&spa_namespace_lock); 3855 3856 nvlist_free(config); 3857 return (error); 3858} 3859 3860#else 3861 3862extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs, 3863 uint64_t *count); 3864 3865static nvlist_t * 3866spa_generate_rootconf(const char *name) 3867{ 3868 nvlist_t **configs, **tops; 3869 nvlist_t *config; 3870 nvlist_t *best_cfg, *nvtop, *nvroot; 3871 uint64_t *holes; 3872 uint64_t best_txg; 3873 uint64_t nchildren; 3874 uint64_t pgid; 3875 uint64_t count; 3876 uint64_t i; 3877 uint_t nholes; 3878 3879 if (vdev_geom_read_pool_label(name, &configs, &count) != 0) 3880 return (NULL); 3881 3882 ASSERT3U(count, !=, 0); 3883 best_txg = 0; 3884 for (i = 0; i < count; i++) { 3885 uint64_t txg; 3886 3887 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG, 3888 &txg) == 0); 3889 if (txg > best_txg) { 3890 best_txg = txg; 3891 best_cfg = configs[i]; 3892 } 3893 } 3894 3895 /* 3896 * Multi-vdev root pool configuration discovery is not supported yet. 3897 */ 3898 nchildren = 1; 3899 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren); 3900 holes = NULL; 3901 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY, 3902 &holes, &nholes); 3903 3904 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP); 3905 for (i = 0; i < nchildren; i++) { 3906 if (i >= count) 3907 break; 3908 if (configs[i] == NULL) 3909 continue; 3910 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE, 3911 &nvtop) == 0); 3912 nvlist_dup(nvtop, &tops[i], KM_SLEEP); 3913 } 3914 for (i = 0; holes != NULL && i < nholes; i++) { 3915 if (i >= nchildren) 3916 continue; 3917 if (tops[holes[i]] != NULL) 3918 continue; 3919 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP); 3920 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE, 3921 VDEV_TYPE_HOLE) == 0); 3922 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, 3923 holes[i]) == 0); 3924 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 3925 0) == 0); 3926 } 3927 for (i = 0; i < nchildren; i++) { 3928 if (tops[i] != NULL) 3929 continue; 3930 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP); 3931 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE, 3932 VDEV_TYPE_MISSING) == 0); 3933 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, 3934 i) == 0); 3935 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 3936 0) == 0); 3937 } 3938 3939 /* 3940 * Create pool config based on the best vdev config. 3941 */ 3942 nvlist_dup(best_cfg, &config, KM_SLEEP); 3943 3944 /* 3945 * Put this pool's top-level vdevs into a root vdev. 3946 */ 3947 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3948 &pgid) == 0); 3949 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3950 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3951 VDEV_TYPE_ROOT) == 0); 3952 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3953 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3954 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3955 tops, nchildren) == 0); 3956 3957 /* 3958 * Replace the existing vdev_tree with the new root vdev in 3959 * this pool's configuration (remove the old, add the new). 3960 */ 3961 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3962 3963 /* 3964 * Drop vdev config elements that should not be present at pool level. 3965 */ 3966 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64); 3967 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64); 3968 3969 for (i = 0; i < count; i++) 3970 nvlist_free(configs[i]); 3971 kmem_free(configs, count * sizeof(void *)); 3972 for (i = 0; i < nchildren; i++) 3973 nvlist_free(tops[i]); 3974 kmem_free(tops, nchildren * sizeof(void *)); 3975 nvlist_free(nvroot); 3976 return (config); 3977} 3978 3979int 3980spa_import_rootpool(const char *name) 3981{ 3982 spa_t *spa; 3983 vdev_t *rvd, *bvd, *avd = NULL; 3984 nvlist_t *config, *nvtop; 3985 uint64_t txg; 3986 char *pname; 3987 int error; 3988 3989 /* 3990 * Read the label from the boot device and generate a configuration. 3991 */ 3992 config = spa_generate_rootconf(name); 3993 3994 mutex_enter(&spa_namespace_lock); 3995 if (config != NULL) { 3996 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 3997 &pname) == 0 && strcmp(name, pname) == 0); 3998 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) 3999 == 0); 4000 4001 if ((spa = spa_lookup(pname)) != NULL) { 4002 /* 4003 * Remove the existing root pool from the namespace so 4004 * that we can replace it with the correct config 4005 * we just read in. 4006 */ 4007 spa_remove(spa); 4008 } 4009 spa = spa_add(pname, config, NULL); 4010 4011 /* 4012 * Set spa_ubsync.ub_version as it can be used in vdev_alloc() 4013 * via spa_version(). 4014 */ 4015 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 4016 &spa->spa_ubsync.ub_version) != 0) 4017 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 4018 } else if ((spa = spa_lookup(name)) == NULL) { 4019 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'", 4020 name); 4021 return (EIO); 4022 } else { 4023 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0); 4024 } 4025 spa->spa_is_root = B_TRUE; 4026 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 4027 4028 /* 4029 * Build up a vdev tree based on the boot device's label config. 4030 */ 4031 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4032 &nvtop) == 0); 4033 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4034 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 4035 VDEV_ALLOC_ROOTPOOL); 4036 spa_config_exit(spa, SCL_ALL, FTAG); 4037 if (error) { 4038 mutex_exit(&spa_namespace_lock); 4039 nvlist_free(config); 4040 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 4041 pname); 4042 return (error); 4043 } 4044 4045 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4046 vdev_free(rvd); 4047 spa_config_exit(spa, SCL_ALL, FTAG); 4048 mutex_exit(&spa_namespace_lock); 4049 4050 nvlist_free(config); 4051 return (0); 4052} 4053 4054#endif /* sun */ 4055#endif 4056 4057/* 4058 * Import a non-root pool into the system. 4059 */ 4060int 4061spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 4062{ 4063 spa_t *spa; 4064 char *altroot = NULL; 4065 spa_load_state_t state = SPA_LOAD_IMPORT; 4066 zpool_rewind_policy_t policy; 4067 uint64_t mode = spa_mode_global; 4068 uint64_t readonly = B_FALSE; 4069 int error; 4070 nvlist_t *nvroot; 4071 nvlist_t **spares, **l2cache; 4072 uint_t nspares, nl2cache; 4073 4074 /* 4075 * If a pool with this name exists, return failure. 4076 */ 4077 mutex_enter(&spa_namespace_lock); 4078 if (spa_lookup(pool) != NULL) { 4079 mutex_exit(&spa_namespace_lock); 4080 return (SET_ERROR(EEXIST)); 4081 } 4082 4083 /* 4084 * Create and initialize the spa structure. 4085 */ 4086 (void) nvlist_lookup_string(props, 4087 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 4088 (void) nvlist_lookup_uint64(props, 4089 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 4090 if (readonly) 4091 mode = FREAD; 4092 spa = spa_add(pool, config, altroot); 4093 spa->spa_import_flags = flags; 4094 4095 /* 4096 * Verbatim import - Take a pool and insert it into the namespace 4097 * as if it had been loaded at boot. 4098 */ 4099 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 4100 if (props != NULL) 4101 spa_configfile_set(spa, props, B_FALSE); 4102 4103 spa_config_sync(spa, B_FALSE, B_TRUE); 4104 4105 mutex_exit(&spa_namespace_lock); 4106 return (0); 4107 } 4108 4109 spa_activate(spa, mode); 4110 4111 /* 4112 * Don't start async tasks until we know everything is healthy. 4113 */ 4114 spa_async_suspend(spa); 4115 4116 zpool_get_rewind_policy(config, &policy); 4117 if (policy.zrp_request & ZPOOL_DO_REWIND) 4118 state = SPA_LOAD_RECOVER; 4119 4120 /* 4121 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig 4122 * because the user-supplied config is actually the one to trust when 4123 * doing an import. 4124 */ 4125 if (state != SPA_LOAD_RECOVER) 4126 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 4127 4128 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, 4129 policy.zrp_request); 4130 4131 /* 4132 * Propagate anything learned while loading the pool and pass it 4133 * back to caller (i.e. rewind info, missing devices, etc). 4134 */ 4135 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4136 spa->spa_load_info) == 0); 4137 4138 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4139 /* 4140 * Toss any existing sparelist, as it doesn't have any validity 4141 * anymore, and conflicts with spa_has_spare(). 4142 */ 4143 if (spa->spa_spares.sav_config) { 4144 nvlist_free(spa->spa_spares.sav_config); 4145 spa->spa_spares.sav_config = NULL; 4146 spa_load_spares(spa); 4147 } 4148 if (spa->spa_l2cache.sav_config) { 4149 nvlist_free(spa->spa_l2cache.sav_config); 4150 spa->spa_l2cache.sav_config = NULL; 4151 spa_load_l2cache(spa); 4152 } 4153 4154 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4155 &nvroot) == 0); 4156 if (error == 0) 4157 error = spa_validate_aux(spa, nvroot, -1ULL, 4158 VDEV_ALLOC_SPARE); 4159 if (error == 0) 4160 error = spa_validate_aux(spa, nvroot, -1ULL, 4161 VDEV_ALLOC_L2CACHE); 4162 spa_config_exit(spa, SCL_ALL, FTAG); 4163 4164 if (props != NULL) 4165 spa_configfile_set(spa, props, B_FALSE); 4166 4167 if (error != 0 || (props && spa_writeable(spa) && 4168 (error = spa_prop_set(spa, props)))) { 4169 spa_unload(spa); 4170 spa_deactivate(spa); 4171 spa_remove(spa); 4172 mutex_exit(&spa_namespace_lock); 4173 return (error); 4174 } 4175 4176 spa_async_resume(spa); 4177 4178 /* 4179 * Override any spares and level 2 cache devices as specified by 4180 * the user, as these may have correct device names/devids, etc. 4181 */ 4182 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 4183 &spares, &nspares) == 0) { 4184 if (spa->spa_spares.sav_config) 4185 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 4186 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 4187 else 4188 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 4189 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4190 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 4191 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 4192 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4193 spa_load_spares(spa); 4194 spa_config_exit(spa, SCL_ALL, FTAG); 4195 spa->spa_spares.sav_sync = B_TRUE; 4196 } 4197 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 4198 &l2cache, &nl2cache) == 0) { 4199 if (spa->spa_l2cache.sav_config) 4200 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 4201 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 4202 else 4203 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 4204 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4205 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 4206 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 4207 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4208 spa_load_l2cache(spa); 4209 spa_config_exit(spa, SCL_ALL, FTAG); 4210 spa->spa_l2cache.sav_sync = B_TRUE; 4211 } 4212 4213 /* 4214 * Check for any removed devices. 4215 */ 4216 if (spa->spa_autoreplace) { 4217 spa_aux_check_removed(&spa->spa_spares); 4218 spa_aux_check_removed(&spa->spa_l2cache); 4219 } 4220 4221 if (spa_writeable(spa)) { 4222 /* 4223 * Update the config cache to include the newly-imported pool. 4224 */ 4225 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4226 } 4227 4228 /* 4229 * It's possible that the pool was expanded while it was exported. 4230 * We kick off an async task to handle this for us. 4231 */ 4232 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 4233 4234 mutex_exit(&spa_namespace_lock); 4235 spa_history_log_version(spa, "import"); 4236 4237#ifdef __FreeBSD__ 4238#ifdef _KERNEL 4239 zvol_create_minors(pool); 4240#endif 4241#endif 4242 return (0); 4243} 4244 4245nvlist_t * 4246spa_tryimport(nvlist_t *tryconfig) 4247{ 4248 nvlist_t *config = NULL; 4249 char *poolname; 4250 spa_t *spa; 4251 uint64_t state; 4252 int error; 4253 4254 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 4255 return (NULL); 4256 4257 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 4258 return (NULL); 4259 4260 /* 4261 * Create and initialize the spa structure. 4262 */ 4263 mutex_enter(&spa_namespace_lock); 4264 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 4265 spa_activate(spa, FREAD); 4266 4267 /* 4268 * Pass off the heavy lifting to spa_load(). 4269 * Pass TRUE for mosconfig because the user-supplied config 4270 * is actually the one to trust when doing an import. 4271 */ 4272 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); 4273 4274 /* 4275 * If 'tryconfig' was at least parsable, return the current config. 4276 */ 4277 if (spa->spa_root_vdev != NULL) { 4278 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4279 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 4280 poolname) == 0); 4281 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 4282 state) == 0); 4283 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 4284 spa->spa_uberblock.ub_timestamp) == 0); 4285 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4286 spa->spa_load_info) == 0); 4287 4288 /* 4289 * If the bootfs property exists on this pool then we 4290 * copy it out so that external consumers can tell which 4291 * pools are bootable. 4292 */ 4293 if ((!error || error == EEXIST) && spa->spa_bootfs) { 4294 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4295 4296 /* 4297 * We have to play games with the name since the 4298 * pool was opened as TRYIMPORT_NAME. 4299 */ 4300 if (dsl_dsobj_to_dsname(spa_name(spa), 4301 spa->spa_bootfs, tmpname) == 0) { 4302 char *cp; 4303 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4304 4305 cp = strchr(tmpname, '/'); 4306 if (cp == NULL) { 4307 (void) strlcpy(dsname, tmpname, 4308 MAXPATHLEN); 4309 } else { 4310 (void) snprintf(dsname, MAXPATHLEN, 4311 "%s/%s", poolname, ++cp); 4312 } 4313 VERIFY(nvlist_add_string(config, 4314 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 4315 kmem_free(dsname, MAXPATHLEN); 4316 } 4317 kmem_free(tmpname, MAXPATHLEN); 4318 } 4319 4320 /* 4321 * Add the list of hot spares and level 2 cache devices. 4322 */ 4323 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4324 spa_add_spares(spa, config); 4325 spa_add_l2cache(spa, config); 4326 spa_config_exit(spa, SCL_CONFIG, FTAG); 4327 } 4328 4329 spa_unload(spa); 4330 spa_deactivate(spa); 4331 spa_remove(spa); 4332 mutex_exit(&spa_namespace_lock); 4333 4334 return (config); 4335} 4336 4337/* 4338 * Pool export/destroy 4339 * 4340 * The act of destroying or exporting a pool is very simple. We make sure there 4341 * is no more pending I/O and any references to the pool are gone. Then, we 4342 * update the pool state and sync all the labels to disk, removing the 4343 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 4344 * we don't sync the labels or remove the configuration cache. 4345 */ 4346static int 4347spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 4348 boolean_t force, boolean_t hardforce) 4349{ 4350 spa_t *spa; 4351 4352 if (oldconfig) 4353 *oldconfig = NULL; 4354 4355 if (!(spa_mode_global & FWRITE)) 4356 return (SET_ERROR(EROFS)); 4357 4358 mutex_enter(&spa_namespace_lock); 4359 if ((spa = spa_lookup(pool)) == NULL) { 4360 mutex_exit(&spa_namespace_lock); 4361 return (SET_ERROR(ENOENT)); 4362 } 4363 4364 /* 4365 * Put a hold on the pool, drop the namespace lock, stop async tasks, 4366 * reacquire the namespace lock, and see if we can export. 4367 */ 4368 spa_open_ref(spa, FTAG); 4369 mutex_exit(&spa_namespace_lock); 4370 spa_async_suspend(spa); 4371 mutex_enter(&spa_namespace_lock); 4372 spa_close(spa, FTAG); 4373 4374 /* 4375 * The pool will be in core if it's openable, 4376 * in which case we can modify its state. 4377 */ 4378 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 4379 /* 4380 * Objsets may be open only because they're dirty, so we 4381 * have to force it to sync before checking spa_refcnt. 4382 */ 4383 txg_wait_synced(spa->spa_dsl_pool, 0); 4384 4385 /* 4386 * A pool cannot be exported or destroyed if there are active 4387 * references. If we are resetting a pool, allow references by 4388 * fault injection handlers. 4389 */ 4390 if (!spa_refcount_zero(spa) || 4391 (spa->spa_inject_ref != 0 && 4392 new_state != POOL_STATE_UNINITIALIZED)) { 4393 spa_async_resume(spa); 4394 mutex_exit(&spa_namespace_lock); 4395 return (SET_ERROR(EBUSY)); 4396 } 4397 4398 /* 4399 * A pool cannot be exported if it has an active shared spare. 4400 * This is to prevent other pools stealing the active spare 4401 * from an exported pool. At user's own will, such pool can 4402 * be forcedly exported. 4403 */ 4404 if (!force && new_state == POOL_STATE_EXPORTED && 4405 spa_has_active_shared_spare(spa)) { 4406 spa_async_resume(spa); 4407 mutex_exit(&spa_namespace_lock); 4408 return (SET_ERROR(EXDEV)); 4409 } 4410 4411 /* 4412 * We want this to be reflected on every label, 4413 * so mark them all dirty. spa_unload() will do the 4414 * final sync that pushes these changes out. 4415 */ 4416 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 4417 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4418 spa->spa_state = new_state; 4419 spa->spa_final_txg = spa_last_synced_txg(spa) + 4420 TXG_DEFER_SIZE + 1; 4421 vdev_config_dirty(spa->spa_root_vdev); 4422 spa_config_exit(spa, SCL_ALL, FTAG); 4423 } 4424 } 4425 4426 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY); 4427 4428 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 4429 spa_unload(spa); 4430 spa_deactivate(spa); 4431 } 4432 4433 if (oldconfig && spa->spa_config) 4434 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 4435 4436 if (new_state != POOL_STATE_UNINITIALIZED) { 4437 if (!hardforce) 4438 spa_config_sync(spa, B_TRUE, B_TRUE); 4439 spa_remove(spa); 4440 } 4441 mutex_exit(&spa_namespace_lock); 4442 4443 return (0); 4444} 4445 4446/* 4447 * Destroy a storage pool. 4448 */ 4449int 4450spa_destroy(char *pool) 4451{ 4452 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 4453 B_FALSE, B_FALSE)); 4454} 4455 4456/* 4457 * Export a storage pool. 4458 */ 4459int 4460spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 4461 boolean_t hardforce) 4462{ 4463 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 4464 force, hardforce)); 4465} 4466 4467/* 4468 * Similar to spa_export(), this unloads the spa_t without actually removing it 4469 * from the namespace in any way. 4470 */ 4471int 4472spa_reset(char *pool) 4473{ 4474 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 4475 B_FALSE, B_FALSE)); 4476} 4477 4478/* 4479 * ========================================================================== 4480 * Device manipulation 4481 * ========================================================================== 4482 */ 4483 4484/* 4485 * Add a device to a storage pool. 4486 */ 4487int 4488spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 4489{ 4490 uint64_t txg, id; 4491 int error; 4492 vdev_t *rvd = spa->spa_root_vdev; 4493 vdev_t *vd, *tvd; 4494 nvlist_t **spares, **l2cache; 4495 uint_t nspares, nl2cache; 4496 4497 ASSERT(spa_writeable(spa)); 4498 4499 txg = spa_vdev_enter(spa); 4500 4501 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 4502 VDEV_ALLOC_ADD)) != 0) 4503 return (spa_vdev_exit(spa, NULL, txg, error)); 4504 4505 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 4506 4507 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 4508 &nspares) != 0) 4509 nspares = 0; 4510 4511 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 4512 &nl2cache) != 0) 4513 nl2cache = 0; 4514 4515 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 4516 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 4517 4518 if (vd->vdev_children != 0 && 4519 (error = vdev_create(vd, txg, B_FALSE)) != 0) 4520 return (spa_vdev_exit(spa, vd, txg, error)); 4521 4522 /* 4523 * We must validate the spares and l2cache devices after checking the 4524 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 4525 */ 4526 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 4527 return (spa_vdev_exit(spa, vd, txg, error)); 4528 4529 /* 4530 * Transfer each new top-level vdev from vd to rvd. 4531 */ 4532 for (int c = 0; c < vd->vdev_children; c++) { 4533 4534 /* 4535 * Set the vdev id to the first hole, if one exists. 4536 */ 4537 for (id = 0; id < rvd->vdev_children; id++) { 4538 if (rvd->vdev_child[id]->vdev_ishole) { 4539 vdev_free(rvd->vdev_child[id]); 4540 break; 4541 } 4542 } 4543 tvd = vd->vdev_child[c]; 4544 vdev_remove_child(vd, tvd); 4545 tvd->vdev_id = id; 4546 vdev_add_child(rvd, tvd); 4547 vdev_config_dirty(tvd); 4548 } 4549 4550 if (nspares != 0) { 4551 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 4552 ZPOOL_CONFIG_SPARES); 4553 spa_load_spares(spa); 4554 spa->spa_spares.sav_sync = B_TRUE; 4555 } 4556 4557 if (nl2cache != 0) { 4558 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 4559 ZPOOL_CONFIG_L2CACHE); 4560 spa_load_l2cache(spa); 4561 spa->spa_l2cache.sav_sync = B_TRUE; 4562 } 4563 4564 /* 4565 * We have to be careful when adding new vdevs to an existing pool. 4566 * If other threads start allocating from these vdevs before we 4567 * sync the config cache, and we lose power, then upon reboot we may 4568 * fail to open the pool because there are DVAs that the config cache 4569 * can't translate. Therefore, we first add the vdevs without 4570 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 4571 * and then let spa_config_update() initialize the new metaslabs. 4572 * 4573 * spa_load() checks for added-but-not-initialized vdevs, so that 4574 * if we lose power at any point in this sequence, the remaining 4575 * steps will be completed the next time we load the pool. 4576 */ 4577 (void) spa_vdev_exit(spa, vd, txg, 0); 4578 4579 mutex_enter(&spa_namespace_lock); 4580 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4581 mutex_exit(&spa_namespace_lock); 4582 4583 return (0); 4584} 4585 4586/* 4587 * Attach a device to a mirror. The arguments are the path to any device 4588 * in the mirror, and the nvroot for the new device. If the path specifies 4589 * a device that is not mirrored, we automatically insert the mirror vdev. 4590 * 4591 * If 'replacing' is specified, the new device is intended to replace the 4592 * existing device; in this case the two devices are made into their own 4593 * mirror using the 'replacing' vdev, which is functionally identical to 4594 * the mirror vdev (it actually reuses all the same ops) but has a few 4595 * extra rules: you can't attach to it after it's been created, and upon 4596 * completion of resilvering, the first disk (the one being replaced) 4597 * is automatically detached. 4598 */ 4599int 4600spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 4601{ 4602 uint64_t txg, dtl_max_txg; 4603 vdev_t *rvd = spa->spa_root_vdev; 4604 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 4605 vdev_ops_t *pvops; 4606 char *oldvdpath, *newvdpath; 4607 int newvd_isspare; 4608 int error; 4609 4610 ASSERT(spa_writeable(spa)); 4611 4612 txg = spa_vdev_enter(spa); 4613 4614 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 4615 4616 if (oldvd == NULL) 4617 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4618 4619 if (!oldvd->vdev_ops->vdev_op_leaf) 4620 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4621 4622 pvd = oldvd->vdev_parent; 4623 4624 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 4625 VDEV_ALLOC_ATTACH)) != 0) 4626 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4627 4628 if (newrootvd->vdev_children != 1) 4629 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4630 4631 newvd = newrootvd->vdev_child[0]; 4632 4633 if (!newvd->vdev_ops->vdev_op_leaf) 4634 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4635 4636 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 4637 return (spa_vdev_exit(spa, newrootvd, txg, error)); 4638 4639 /* 4640 * Spares can't replace logs 4641 */ 4642 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 4643 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4644 4645 if (!replacing) { 4646 /* 4647 * For attach, the only allowable parent is a mirror or the root 4648 * vdev. 4649 */ 4650 if (pvd->vdev_ops != &vdev_mirror_ops && 4651 pvd->vdev_ops != &vdev_root_ops) 4652 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4653 4654 pvops = &vdev_mirror_ops; 4655 } else { 4656 /* 4657 * Active hot spares can only be replaced by inactive hot 4658 * spares. 4659 */ 4660 if (pvd->vdev_ops == &vdev_spare_ops && 4661 oldvd->vdev_isspare && 4662 !spa_has_spare(spa, newvd->vdev_guid)) 4663 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4664 4665 /* 4666 * If the source is a hot spare, and the parent isn't already a 4667 * spare, then we want to create a new hot spare. Otherwise, we 4668 * want to create a replacing vdev. The user is not allowed to 4669 * attach to a spared vdev child unless the 'isspare' state is 4670 * the same (spare replaces spare, non-spare replaces 4671 * non-spare). 4672 */ 4673 if (pvd->vdev_ops == &vdev_replacing_ops && 4674 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 4675 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4676 } else if (pvd->vdev_ops == &vdev_spare_ops && 4677 newvd->vdev_isspare != oldvd->vdev_isspare) { 4678 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4679 } 4680 4681 if (newvd->vdev_isspare) 4682 pvops = &vdev_spare_ops; 4683 else 4684 pvops = &vdev_replacing_ops; 4685 } 4686 4687 /* 4688 * Make sure the new device is big enough. 4689 */ 4690 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 4691 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 4692 4693 /* 4694 * The new device cannot have a higher alignment requirement 4695 * than the top-level vdev. 4696 */ 4697 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 4698 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 4699 4700 /* 4701 * If this is an in-place replacement, update oldvd's path and devid 4702 * to make it distinguishable from newvd, and unopenable from now on. 4703 */ 4704 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 4705 spa_strfree(oldvd->vdev_path); 4706 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 4707 KM_SLEEP); 4708 (void) sprintf(oldvd->vdev_path, "%s/%s", 4709 newvd->vdev_path, "old"); 4710 if (oldvd->vdev_devid != NULL) { 4711 spa_strfree(oldvd->vdev_devid); 4712 oldvd->vdev_devid = NULL; 4713 } 4714 } 4715 4716 /* mark the device being resilvered */ 4717 newvd->vdev_resilver_txg = txg; 4718 4719 /* 4720 * If the parent is not a mirror, or if we're replacing, insert the new 4721 * mirror/replacing/spare vdev above oldvd. 4722 */ 4723 if (pvd->vdev_ops != pvops) 4724 pvd = vdev_add_parent(oldvd, pvops); 4725 4726 ASSERT(pvd->vdev_top->vdev_parent == rvd); 4727 ASSERT(pvd->vdev_ops == pvops); 4728 ASSERT(oldvd->vdev_parent == pvd); 4729 4730 /* 4731 * Extract the new device from its root and add it to pvd. 4732 */ 4733 vdev_remove_child(newrootvd, newvd); 4734 newvd->vdev_id = pvd->vdev_children; 4735 newvd->vdev_crtxg = oldvd->vdev_crtxg; 4736 vdev_add_child(pvd, newvd); 4737 4738 tvd = newvd->vdev_top; 4739 ASSERT(pvd->vdev_top == tvd); 4740 ASSERT(tvd->vdev_parent == rvd); 4741 4742 vdev_config_dirty(tvd); 4743 4744 /* 4745 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 4746 * for any dmu_sync-ed blocks. It will propagate upward when 4747 * spa_vdev_exit() calls vdev_dtl_reassess(). 4748 */ 4749 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 4750 4751 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 4752 dtl_max_txg - TXG_INITIAL); 4753 4754 if (newvd->vdev_isspare) { 4755 spa_spare_activate(newvd); 4756 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE); 4757 } 4758 4759 oldvdpath = spa_strdup(oldvd->vdev_path); 4760 newvdpath = spa_strdup(newvd->vdev_path); 4761 newvd_isspare = newvd->vdev_isspare; 4762 4763 /* 4764 * Mark newvd's DTL dirty in this txg. 4765 */ 4766 vdev_dirty(tvd, VDD_DTL, newvd, txg); 4767 4768 /* 4769 * Schedule the resilver to restart in the future. We do this to 4770 * ensure that dmu_sync-ed blocks have been stitched into the 4771 * respective datasets. 4772 */ 4773 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); 4774 4775 /* 4776 * Commit the config 4777 */ 4778 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 4779 4780 spa_history_log_internal(spa, "vdev attach", NULL, 4781 "%s vdev=%s %s vdev=%s", 4782 replacing && newvd_isspare ? "spare in" : 4783 replacing ? "replace" : "attach", newvdpath, 4784 replacing ? "for" : "to", oldvdpath); 4785 4786 spa_strfree(oldvdpath); 4787 spa_strfree(newvdpath); 4788 4789 if (spa->spa_bootfs) 4790 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH); 4791 4792 return (0); 4793} 4794 4795/* 4796 * Detach a device from a mirror or replacing vdev. 4797 * 4798 * If 'replace_done' is specified, only detach if the parent 4799 * is a replacing vdev. 4800 */ 4801int 4802spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 4803{ 4804 uint64_t txg; 4805 int error; 4806 vdev_t *rvd = spa->spa_root_vdev; 4807 vdev_t *vd, *pvd, *cvd, *tvd; 4808 boolean_t unspare = B_FALSE; 4809 uint64_t unspare_guid = 0; 4810 char *vdpath; 4811 4812 ASSERT(spa_writeable(spa)); 4813 4814 txg = spa_vdev_enter(spa); 4815 4816 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 4817 4818 if (vd == NULL) 4819 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4820 4821 if (!vd->vdev_ops->vdev_op_leaf) 4822 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4823 4824 pvd = vd->vdev_parent; 4825 4826 /* 4827 * If the parent/child relationship is not as expected, don't do it. 4828 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 4829 * vdev that's replacing B with C. The user's intent in replacing 4830 * is to go from M(A,B) to M(A,C). If the user decides to cancel 4831 * the replace by detaching C, the expected behavior is to end up 4832 * M(A,B). But suppose that right after deciding to detach C, 4833 * the replacement of B completes. We would have M(A,C), and then 4834 * ask to detach C, which would leave us with just A -- not what 4835 * the user wanted. To prevent this, we make sure that the 4836 * parent/child relationship hasn't changed -- in this example, 4837 * that C's parent is still the replacing vdev R. 4838 */ 4839 if (pvd->vdev_guid != pguid && pguid != 0) 4840 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4841 4842 /* 4843 * Only 'replacing' or 'spare' vdevs can be replaced. 4844 */ 4845 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 4846 pvd->vdev_ops != &vdev_spare_ops) 4847 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4848 4849 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 4850 spa_version(spa) >= SPA_VERSION_SPARES); 4851 4852 /* 4853 * Only mirror, replacing, and spare vdevs support detach. 4854 */ 4855 if (pvd->vdev_ops != &vdev_replacing_ops && 4856 pvd->vdev_ops != &vdev_mirror_ops && 4857 pvd->vdev_ops != &vdev_spare_ops) 4858 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4859 4860 /* 4861 * If this device has the only valid copy of some data, 4862 * we cannot safely detach it. 4863 */ 4864 if (vdev_dtl_required(vd)) 4865 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4866 4867 ASSERT(pvd->vdev_children >= 2); 4868 4869 /* 4870 * If we are detaching the second disk from a replacing vdev, then 4871 * check to see if we changed the original vdev's path to have "/old" 4872 * at the end in spa_vdev_attach(). If so, undo that change now. 4873 */ 4874 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 4875 vd->vdev_path != NULL) { 4876 size_t len = strlen(vd->vdev_path); 4877 4878 for (int c = 0; c < pvd->vdev_children; c++) { 4879 cvd = pvd->vdev_child[c]; 4880 4881 if (cvd == vd || cvd->vdev_path == NULL) 4882 continue; 4883 4884 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 4885 strcmp(cvd->vdev_path + len, "/old") == 0) { 4886 spa_strfree(cvd->vdev_path); 4887 cvd->vdev_path = spa_strdup(vd->vdev_path); 4888 break; 4889 } 4890 } 4891 } 4892 4893 /* 4894 * If we are detaching the original disk from a spare, then it implies 4895 * that the spare should become a real disk, and be removed from the 4896 * active spare list for the pool. 4897 */ 4898 if (pvd->vdev_ops == &vdev_spare_ops && 4899 vd->vdev_id == 0 && 4900 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 4901 unspare = B_TRUE; 4902 4903 /* 4904 * Erase the disk labels so the disk can be used for other things. 4905 * This must be done after all other error cases are handled, 4906 * but before we disembowel vd (so we can still do I/O to it). 4907 * But if we can't do it, don't treat the error as fatal -- 4908 * it may be that the unwritability of the disk is the reason 4909 * it's being detached! 4910 */ 4911 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 4912 4913 /* 4914 * Remove vd from its parent and compact the parent's children. 4915 */ 4916 vdev_remove_child(pvd, vd); 4917 vdev_compact_children(pvd); 4918 4919 /* 4920 * Remember one of the remaining children so we can get tvd below. 4921 */ 4922 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 4923 4924 /* 4925 * If we need to remove the remaining child from the list of hot spares, 4926 * do it now, marking the vdev as no longer a spare in the process. 4927 * We must do this before vdev_remove_parent(), because that can 4928 * change the GUID if it creates a new toplevel GUID. For a similar 4929 * reason, we must remove the spare now, in the same txg as the detach; 4930 * otherwise someone could attach a new sibling, change the GUID, and 4931 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 4932 */ 4933 if (unspare) { 4934 ASSERT(cvd->vdev_isspare); 4935 spa_spare_remove(cvd); 4936 unspare_guid = cvd->vdev_guid; 4937 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 4938 cvd->vdev_unspare = B_TRUE; 4939 } 4940 4941 /* 4942 * If the parent mirror/replacing vdev only has one child, 4943 * the parent is no longer needed. Remove it from the tree. 4944 */ 4945 if (pvd->vdev_children == 1) { 4946 if (pvd->vdev_ops == &vdev_spare_ops) 4947 cvd->vdev_unspare = B_FALSE; 4948 vdev_remove_parent(cvd); 4949 } 4950 4951 4952 /* 4953 * We don't set tvd until now because the parent we just removed 4954 * may have been the previous top-level vdev. 4955 */ 4956 tvd = cvd->vdev_top; 4957 ASSERT(tvd->vdev_parent == rvd); 4958 4959 /* 4960 * Reevaluate the parent vdev state. 4961 */ 4962 vdev_propagate_state(cvd); 4963 4964 /* 4965 * If the 'autoexpand' property is set on the pool then automatically 4966 * try to expand the size of the pool. For example if the device we 4967 * just detached was smaller than the others, it may be possible to 4968 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 4969 * first so that we can obtain the updated sizes of the leaf vdevs. 4970 */ 4971 if (spa->spa_autoexpand) { 4972 vdev_reopen(tvd); 4973 vdev_expand(tvd, txg); 4974 } 4975 4976 vdev_config_dirty(tvd); 4977 4978 /* 4979 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 4980 * vd->vdev_detached is set and free vd's DTL object in syncing context. 4981 * But first make sure we're not on any *other* txg's DTL list, to 4982 * prevent vd from being accessed after it's freed. 4983 */ 4984 vdpath = spa_strdup(vd->vdev_path); 4985 for (int t = 0; t < TXG_SIZE; t++) 4986 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 4987 vd->vdev_detached = B_TRUE; 4988 vdev_dirty(tvd, VDD_DTL, vd, txg); 4989 4990 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE); 4991 4992 /* hang on to the spa before we release the lock */ 4993 spa_open_ref(spa, FTAG); 4994 4995 error = spa_vdev_exit(spa, vd, txg, 0); 4996 4997 spa_history_log_internal(spa, "detach", NULL, 4998 "vdev=%s", vdpath); 4999 spa_strfree(vdpath); 5000 5001 /* 5002 * If this was the removal of the original device in a hot spare vdev, 5003 * then we want to go through and remove the device from the hot spare 5004 * list of every other pool. 5005 */ 5006 if (unspare) { 5007 spa_t *altspa = NULL; 5008 5009 mutex_enter(&spa_namespace_lock); 5010 while ((altspa = spa_next(altspa)) != NULL) { 5011 if (altspa->spa_state != POOL_STATE_ACTIVE || 5012 altspa == spa) 5013 continue; 5014 5015 spa_open_ref(altspa, FTAG); 5016 mutex_exit(&spa_namespace_lock); 5017 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 5018 mutex_enter(&spa_namespace_lock); 5019 spa_close(altspa, FTAG); 5020 } 5021 mutex_exit(&spa_namespace_lock); 5022 5023 /* search the rest of the vdevs for spares to remove */ 5024 spa_vdev_resilver_done(spa); 5025 } 5026 5027 /* all done with the spa; OK to release */ 5028 mutex_enter(&spa_namespace_lock); 5029 spa_close(spa, FTAG); 5030 mutex_exit(&spa_namespace_lock); 5031 5032 return (error); 5033} 5034 5035/* 5036 * Split a set of devices from their mirrors, and create a new pool from them. 5037 */ 5038int 5039spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 5040 nvlist_t *props, boolean_t exp) 5041{ 5042 int error = 0; 5043 uint64_t txg, *glist; 5044 spa_t *newspa; 5045 uint_t c, children, lastlog; 5046 nvlist_t **child, *nvl, *tmp; 5047 dmu_tx_t *tx; 5048 char *altroot = NULL; 5049 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 5050 boolean_t activate_slog; 5051 5052 ASSERT(spa_writeable(spa)); 5053 5054 txg = spa_vdev_enter(spa); 5055 5056 /* clear the log and flush everything up to now */ 5057 activate_slog = spa_passivate_log(spa); 5058 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5059 error = spa_offline_log(spa); 5060 txg = spa_vdev_config_enter(spa); 5061 5062 if (activate_slog) 5063 spa_activate_log(spa); 5064 5065 if (error != 0) 5066 return (spa_vdev_exit(spa, NULL, txg, error)); 5067 5068 /* check new spa name before going any further */ 5069 if (spa_lookup(newname) != NULL) 5070 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 5071 5072 /* 5073 * scan through all the children to ensure they're all mirrors 5074 */ 5075 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 5076 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 5077 &children) != 0) 5078 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5079 5080 /* first, check to ensure we've got the right child count */ 5081 rvd = spa->spa_root_vdev; 5082 lastlog = 0; 5083 for (c = 0; c < rvd->vdev_children; c++) { 5084 vdev_t *vd = rvd->vdev_child[c]; 5085 5086 /* don't count the holes & logs as children */ 5087 if (vd->vdev_islog || vd->vdev_ishole) { 5088 if (lastlog == 0) 5089 lastlog = c; 5090 continue; 5091 } 5092 5093 lastlog = 0; 5094 } 5095 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 5096 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5097 5098 /* next, ensure no spare or cache devices are part of the split */ 5099 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 5100 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 5101 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5102 5103 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 5104 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 5105 5106 /* then, loop over each vdev and validate it */ 5107 for (c = 0; c < children; c++) { 5108 uint64_t is_hole = 0; 5109 5110 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 5111 &is_hole); 5112 5113 if (is_hole != 0) { 5114 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 5115 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 5116 continue; 5117 } else { 5118 error = SET_ERROR(EINVAL); 5119 break; 5120 } 5121 } 5122 5123 /* which disk is going to be split? */ 5124 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 5125 &glist[c]) != 0) { 5126 error = SET_ERROR(EINVAL); 5127 break; 5128 } 5129 5130 /* look it up in the spa */ 5131 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 5132 if (vml[c] == NULL) { 5133 error = SET_ERROR(ENODEV); 5134 break; 5135 } 5136 5137 /* make sure there's nothing stopping the split */ 5138 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 5139 vml[c]->vdev_islog || 5140 vml[c]->vdev_ishole || 5141 vml[c]->vdev_isspare || 5142 vml[c]->vdev_isl2cache || 5143 !vdev_writeable(vml[c]) || 5144 vml[c]->vdev_children != 0 || 5145 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 5146 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 5147 error = SET_ERROR(EINVAL); 5148 break; 5149 } 5150 5151 if (vdev_dtl_required(vml[c])) { 5152 error = SET_ERROR(EBUSY); 5153 break; 5154 } 5155 5156 /* we need certain info from the top level */ 5157 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 5158 vml[c]->vdev_top->vdev_ms_array) == 0); 5159 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 5160 vml[c]->vdev_top->vdev_ms_shift) == 0); 5161 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 5162 vml[c]->vdev_top->vdev_asize) == 0); 5163 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 5164 vml[c]->vdev_top->vdev_ashift) == 0); 5165 } 5166 5167 if (error != 0) { 5168 kmem_free(vml, children * sizeof (vdev_t *)); 5169 kmem_free(glist, children * sizeof (uint64_t)); 5170 return (spa_vdev_exit(spa, NULL, txg, error)); 5171 } 5172 5173 /* stop writers from using the disks */ 5174 for (c = 0; c < children; c++) { 5175 if (vml[c] != NULL) 5176 vml[c]->vdev_offline = B_TRUE; 5177 } 5178 vdev_reopen(spa->spa_root_vdev); 5179 5180 /* 5181 * Temporarily record the splitting vdevs in the spa config. This 5182 * will disappear once the config is regenerated. 5183 */ 5184 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5185 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 5186 glist, children) == 0); 5187 kmem_free(glist, children * sizeof (uint64_t)); 5188 5189 mutex_enter(&spa->spa_props_lock); 5190 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 5191 nvl) == 0); 5192 mutex_exit(&spa->spa_props_lock); 5193 spa->spa_config_splitting = nvl; 5194 vdev_config_dirty(spa->spa_root_vdev); 5195 5196 /* configure and create the new pool */ 5197 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 5198 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 5199 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 5200 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 5201 spa_version(spa)) == 0); 5202 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 5203 spa->spa_config_txg) == 0); 5204 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 5205 spa_generate_guid(NULL)) == 0); 5206 (void) nvlist_lookup_string(props, 5207 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5208 5209 /* add the new pool to the namespace */ 5210 newspa = spa_add(newname, config, altroot); 5211 newspa->spa_config_txg = spa->spa_config_txg; 5212 spa_set_log_state(newspa, SPA_LOG_CLEAR); 5213 5214 /* release the spa config lock, retaining the namespace lock */ 5215 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5216 5217 if (zio_injection_enabled) 5218 zio_handle_panic_injection(spa, FTAG, 1); 5219 5220 spa_activate(newspa, spa_mode_global); 5221 spa_async_suspend(newspa); 5222 5223#ifndef sun 5224 /* mark that we are creating new spa by splitting */ 5225 newspa->spa_splitting_newspa = B_TRUE; 5226#endif 5227 /* create the new pool from the disks of the original pool */ 5228 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); 5229#ifndef sun 5230 newspa->spa_splitting_newspa = B_FALSE; 5231#endif 5232 if (error) 5233 goto out; 5234 5235 /* if that worked, generate a real config for the new pool */ 5236 if (newspa->spa_root_vdev != NULL) { 5237 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 5238 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5239 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 5240 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 5241 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 5242 B_TRUE)); 5243 } 5244 5245 /* set the props */ 5246 if (props != NULL) { 5247 spa_configfile_set(newspa, props, B_FALSE); 5248 error = spa_prop_set(newspa, props); 5249 if (error) 5250 goto out; 5251 } 5252 5253 /* flush everything */ 5254 txg = spa_vdev_config_enter(newspa); 5255 vdev_config_dirty(newspa->spa_root_vdev); 5256 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 5257 5258 if (zio_injection_enabled) 5259 zio_handle_panic_injection(spa, FTAG, 2); 5260 5261 spa_async_resume(newspa); 5262 5263 /* finally, update the original pool's config */ 5264 txg = spa_vdev_config_enter(spa); 5265 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 5266 error = dmu_tx_assign(tx, TXG_WAIT); 5267 if (error != 0) 5268 dmu_tx_abort(tx); 5269 for (c = 0; c < children; c++) { 5270 if (vml[c] != NULL) { 5271 vdev_split(vml[c]); 5272 if (error == 0) 5273 spa_history_log_internal(spa, "detach", tx, 5274 "vdev=%s", vml[c]->vdev_path); 5275 vdev_free(vml[c]); 5276 } 5277 } 5278 vdev_config_dirty(spa->spa_root_vdev); 5279 spa->spa_config_splitting = NULL; 5280 nvlist_free(nvl); 5281 if (error == 0) 5282 dmu_tx_commit(tx); 5283 (void) spa_vdev_exit(spa, NULL, txg, 0); 5284 5285 if (zio_injection_enabled) 5286 zio_handle_panic_injection(spa, FTAG, 3); 5287 5288 /* split is complete; log a history record */ 5289 spa_history_log_internal(newspa, "split", NULL, 5290 "from pool %s", spa_name(spa)); 5291 5292 kmem_free(vml, children * sizeof (vdev_t *)); 5293 5294 /* if we're not going to mount the filesystems in userland, export */ 5295 if (exp) 5296 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 5297 B_FALSE, B_FALSE); 5298 5299 return (error); 5300 5301out: 5302 spa_unload(newspa); 5303 spa_deactivate(newspa); 5304 spa_remove(newspa); 5305 5306 txg = spa_vdev_config_enter(spa); 5307 5308 /* re-online all offlined disks */ 5309 for (c = 0; c < children; c++) { 5310 if (vml[c] != NULL) 5311 vml[c]->vdev_offline = B_FALSE; 5312 } 5313 vdev_reopen(spa->spa_root_vdev); 5314 5315 nvlist_free(spa->spa_config_splitting); 5316 spa->spa_config_splitting = NULL; 5317 (void) spa_vdev_exit(spa, NULL, txg, error); 5318 5319 kmem_free(vml, children * sizeof (vdev_t *)); 5320 return (error); 5321} 5322 5323static nvlist_t * 5324spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) 5325{ 5326 for (int i = 0; i < count; i++) { 5327 uint64_t guid; 5328 5329 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, 5330 &guid) == 0); 5331 5332 if (guid == target_guid) 5333 return (nvpp[i]); 5334 } 5335 5336 return (NULL); 5337} 5338 5339static void 5340spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, 5341 nvlist_t *dev_to_remove) 5342{ 5343 nvlist_t **newdev = NULL; 5344 5345 if (count > 1) 5346 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); 5347 5348 for (int i = 0, j = 0; i < count; i++) { 5349 if (dev[i] == dev_to_remove) 5350 continue; 5351 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); 5352 } 5353 5354 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); 5355 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); 5356 5357 for (int i = 0; i < count - 1; i++) 5358 nvlist_free(newdev[i]); 5359 5360 if (count > 1) 5361 kmem_free(newdev, (count - 1) * sizeof (void *)); 5362} 5363 5364/* 5365 * Evacuate the device. 5366 */ 5367static int 5368spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) 5369{ 5370 uint64_t txg; 5371 int error = 0; 5372 5373 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5374 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5375 ASSERT(vd == vd->vdev_top); 5376 5377 /* 5378 * Evacuate the device. We don't hold the config lock as writer 5379 * since we need to do I/O but we do keep the 5380 * spa_namespace_lock held. Once this completes the device 5381 * should no longer have any blocks allocated on it. 5382 */ 5383 if (vd->vdev_islog) { 5384 if (vd->vdev_stat.vs_alloc != 0) 5385 error = spa_offline_log(spa); 5386 } else { 5387 error = SET_ERROR(ENOTSUP); 5388 } 5389 5390 if (error) 5391 return (error); 5392 5393 /* 5394 * The evacuation succeeded. Remove any remaining MOS metadata 5395 * associated with this vdev, and wait for these changes to sync. 5396 */ 5397 ASSERT0(vd->vdev_stat.vs_alloc); 5398 txg = spa_vdev_config_enter(spa); 5399 vd->vdev_removing = B_TRUE; 5400 vdev_dirty_leaves(vd, VDD_DTL, txg); 5401 vdev_config_dirty(vd); 5402 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5403 5404 return (0); 5405} 5406 5407/* 5408 * Complete the removal by cleaning up the namespace. 5409 */ 5410static void 5411spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd) 5412{ 5413 vdev_t *rvd = spa->spa_root_vdev; 5414 uint64_t id = vd->vdev_id; 5415 boolean_t last_vdev = (id == (rvd->vdev_children - 1)); 5416 5417 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5418 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 5419 ASSERT(vd == vd->vdev_top); 5420 5421 /* 5422 * Only remove any devices which are empty. 5423 */ 5424 if (vd->vdev_stat.vs_alloc != 0) 5425 return; 5426 5427 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 5428 5429 if (list_link_active(&vd->vdev_state_dirty_node)) 5430 vdev_state_clean(vd); 5431 if (list_link_active(&vd->vdev_config_dirty_node)) 5432 vdev_config_clean(vd); 5433 5434 vdev_free(vd); 5435 5436 if (last_vdev) { 5437 vdev_compact_children(rvd); 5438 } else { 5439 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); 5440 vdev_add_child(rvd, vd); 5441 } 5442 vdev_config_dirty(rvd); 5443 5444 /* 5445 * Reassess the health of our root vdev. 5446 */ 5447 vdev_reopen(rvd); 5448} 5449 5450/* 5451 * Remove a device from the pool - 5452 * 5453 * Removing a device from the vdev namespace requires several steps 5454 * and can take a significant amount of time. As a result we use 5455 * the spa_vdev_config_[enter/exit] functions which allow us to 5456 * grab and release the spa_config_lock while still holding the namespace 5457 * lock. During each step the configuration is synced out. 5458 * 5459 * Currently, this supports removing only hot spares, slogs, and level 2 ARC 5460 * devices. 5461 */ 5462int 5463spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) 5464{ 5465 vdev_t *vd; 5466 metaslab_group_t *mg; 5467 nvlist_t **spares, **l2cache, *nv; 5468 uint64_t txg = 0; 5469 uint_t nspares, nl2cache; 5470 int error = 0; 5471 boolean_t locked = MUTEX_HELD(&spa_namespace_lock); 5472 5473 ASSERT(spa_writeable(spa)); 5474 5475 if (!locked) 5476 txg = spa_vdev_enter(spa); 5477 5478 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 5479 5480 if (spa->spa_spares.sav_vdevs != NULL && 5481 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 5482 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && 5483 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { 5484 /* 5485 * Only remove the hot spare if it's not currently in use 5486 * in this pool. 5487 */ 5488 if (vd == NULL || unspare) { 5489 spa_vdev_remove_aux(spa->spa_spares.sav_config, 5490 ZPOOL_CONFIG_SPARES, spares, nspares, nv); 5491 spa_load_spares(spa); 5492 spa->spa_spares.sav_sync = B_TRUE; 5493 } else { 5494 error = SET_ERROR(EBUSY); 5495 } 5496 } else if (spa->spa_l2cache.sav_vdevs != NULL && 5497 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 5498 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && 5499 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { 5500 /* 5501 * Cache devices can always be removed. 5502 */ 5503 spa_vdev_remove_aux(spa->spa_l2cache.sav_config, 5504 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); 5505 spa_load_l2cache(spa); 5506 spa->spa_l2cache.sav_sync = B_TRUE; 5507 } else if (vd != NULL && vd->vdev_islog) { 5508 ASSERT(!locked); 5509 ASSERT(vd == vd->vdev_top); 5510 5511 /* 5512 * XXX - Once we have bp-rewrite this should 5513 * become the common case. 5514 */ 5515 5516 mg = vd->vdev_mg; 5517 5518 /* 5519 * Stop allocating from this vdev. 5520 */ 5521 metaslab_group_passivate(mg); 5522 5523 /* 5524 * Wait for the youngest allocations and frees to sync, 5525 * and then wait for the deferral of those frees to finish. 5526 */ 5527 spa_vdev_config_exit(spa, NULL, 5528 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); 5529 5530 /* 5531 * Attempt to evacuate the vdev. 5532 */ 5533 error = spa_vdev_remove_evacuate(spa, vd); 5534 5535 txg = spa_vdev_config_enter(spa); 5536 5537 /* 5538 * If we couldn't evacuate the vdev, unwind. 5539 */ 5540 if (error) { 5541 metaslab_group_activate(mg); 5542 return (spa_vdev_exit(spa, NULL, txg, error)); 5543 } 5544 5545 /* 5546 * Clean up the vdev namespace. 5547 */ 5548 spa_vdev_remove_from_namespace(spa, vd); 5549 5550 } else if (vd != NULL) { 5551 /* 5552 * Normal vdevs cannot be removed (yet). 5553 */ 5554 error = SET_ERROR(ENOTSUP); 5555 } else { 5556 /* 5557 * There is no vdev of any kind with the specified guid. 5558 */ 5559 error = SET_ERROR(ENOENT); 5560 } 5561 5562 if (!locked) 5563 return (spa_vdev_exit(spa, NULL, txg, error)); 5564 5565 return (error); 5566} 5567 5568/* 5569 * Find any device that's done replacing, or a vdev marked 'unspare' that's 5570 * currently spared, so we can detach it. 5571 */ 5572static vdev_t * 5573spa_vdev_resilver_done_hunt(vdev_t *vd) 5574{ 5575 vdev_t *newvd, *oldvd; 5576 5577 for (int c = 0; c < vd->vdev_children; c++) { 5578 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 5579 if (oldvd != NULL) 5580 return (oldvd); 5581 } 5582 5583 /* 5584 * Check for a completed replacement. We always consider the first 5585 * vdev in the list to be the oldest vdev, and the last one to be 5586 * the newest (see spa_vdev_attach() for how that works). In 5587 * the case where the newest vdev is faulted, we will not automatically 5588 * remove it after a resilver completes. This is OK as it will require 5589 * user intervention to determine which disk the admin wishes to keep. 5590 */ 5591 if (vd->vdev_ops == &vdev_replacing_ops) { 5592 ASSERT(vd->vdev_children > 1); 5593 5594 newvd = vd->vdev_child[vd->vdev_children - 1]; 5595 oldvd = vd->vdev_child[0]; 5596 5597 if (vdev_dtl_empty(newvd, DTL_MISSING) && 5598 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5599 !vdev_dtl_required(oldvd)) 5600 return (oldvd); 5601 } 5602 5603 /* 5604 * Check for a completed resilver with the 'unspare' flag set. 5605 */ 5606 if (vd->vdev_ops == &vdev_spare_ops) { 5607 vdev_t *first = vd->vdev_child[0]; 5608 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 5609 5610 if (last->vdev_unspare) { 5611 oldvd = first; 5612 newvd = last; 5613 } else if (first->vdev_unspare) { 5614 oldvd = last; 5615 newvd = first; 5616 } else { 5617 oldvd = NULL; 5618 } 5619 5620 if (oldvd != NULL && 5621 vdev_dtl_empty(newvd, DTL_MISSING) && 5622 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5623 !vdev_dtl_required(oldvd)) 5624 return (oldvd); 5625 5626 /* 5627 * If there are more than two spares attached to a disk, 5628 * and those spares are not required, then we want to 5629 * attempt to free them up now so that they can be used 5630 * by other pools. Once we're back down to a single 5631 * disk+spare, we stop removing them. 5632 */ 5633 if (vd->vdev_children > 2) { 5634 newvd = vd->vdev_child[1]; 5635 5636 if (newvd->vdev_isspare && last->vdev_isspare && 5637 vdev_dtl_empty(last, DTL_MISSING) && 5638 vdev_dtl_empty(last, DTL_OUTAGE) && 5639 !vdev_dtl_required(newvd)) 5640 return (newvd); 5641 } 5642 } 5643 5644 return (NULL); 5645} 5646 5647static void 5648spa_vdev_resilver_done(spa_t *spa) 5649{ 5650 vdev_t *vd, *pvd, *ppvd; 5651 uint64_t guid, sguid, pguid, ppguid; 5652 5653 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5654 5655 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 5656 pvd = vd->vdev_parent; 5657 ppvd = pvd->vdev_parent; 5658 guid = vd->vdev_guid; 5659 pguid = pvd->vdev_guid; 5660 ppguid = ppvd->vdev_guid; 5661 sguid = 0; 5662 /* 5663 * If we have just finished replacing a hot spared device, then 5664 * we need to detach the parent's first child (the original hot 5665 * spare) as well. 5666 */ 5667 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 5668 ppvd->vdev_children == 2) { 5669 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 5670 sguid = ppvd->vdev_child[1]->vdev_guid; 5671 } 5672 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); 5673 5674 spa_config_exit(spa, SCL_ALL, FTAG); 5675 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 5676 return; 5677 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 5678 return; 5679 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5680 } 5681 5682 spa_config_exit(spa, SCL_ALL, FTAG); 5683} 5684 5685/* 5686 * Update the stored path or FRU for this vdev. 5687 */ 5688int 5689spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 5690 boolean_t ispath) 5691{ 5692 vdev_t *vd; 5693 boolean_t sync = B_FALSE; 5694 5695 ASSERT(spa_writeable(spa)); 5696 5697 spa_vdev_state_enter(spa, SCL_ALL); 5698 5699 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 5700 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 5701 5702 if (!vd->vdev_ops->vdev_op_leaf) 5703 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 5704 5705 if (ispath) { 5706 if (strcmp(value, vd->vdev_path) != 0) { 5707 spa_strfree(vd->vdev_path); 5708 vd->vdev_path = spa_strdup(value); 5709 sync = B_TRUE; 5710 } 5711 } else { 5712 if (vd->vdev_fru == NULL) { 5713 vd->vdev_fru = spa_strdup(value); 5714 sync = B_TRUE; 5715 } else if (strcmp(value, vd->vdev_fru) != 0) { 5716 spa_strfree(vd->vdev_fru); 5717 vd->vdev_fru = spa_strdup(value); 5718 sync = B_TRUE; 5719 } 5720 } 5721 5722 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 5723} 5724 5725int 5726spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 5727{ 5728 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 5729} 5730 5731int 5732spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 5733{ 5734 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 5735} 5736 5737/* 5738 * ========================================================================== 5739 * SPA Scanning 5740 * ========================================================================== 5741 */ 5742 5743int 5744spa_scan_stop(spa_t *spa) 5745{ 5746 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5747 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 5748 return (SET_ERROR(EBUSY)); 5749 return (dsl_scan_cancel(spa->spa_dsl_pool)); 5750} 5751 5752int 5753spa_scan(spa_t *spa, pool_scan_func_t func) 5754{ 5755 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5756 5757 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 5758 return (SET_ERROR(ENOTSUP)); 5759 5760 /* 5761 * If a resilver was requested, but there is no DTL on a 5762 * writeable leaf device, we have nothing to do. 5763 */ 5764 if (func == POOL_SCAN_RESILVER && 5765 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 5766 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 5767 return (0); 5768 } 5769 5770 return (dsl_scan(spa->spa_dsl_pool, func)); 5771} 5772 5773/* 5774 * ========================================================================== 5775 * SPA async task processing 5776 * ========================================================================== 5777 */ 5778 5779static void 5780spa_async_remove(spa_t *spa, vdev_t *vd) 5781{ 5782 if (vd->vdev_remove_wanted) { 5783 vd->vdev_remove_wanted = B_FALSE; 5784 vd->vdev_delayed_close = B_FALSE; 5785 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 5786 5787 /* 5788 * We want to clear the stats, but we don't want to do a full 5789 * vdev_clear() as that will cause us to throw away 5790 * degraded/faulted state as well as attempt to reopen the 5791 * device, all of which is a waste. 5792 */ 5793 vd->vdev_stat.vs_read_errors = 0; 5794 vd->vdev_stat.vs_write_errors = 0; 5795 vd->vdev_stat.vs_checksum_errors = 0; 5796 5797 vdev_state_dirty(vd->vdev_top); 5798 } 5799 5800 for (int c = 0; c < vd->vdev_children; c++) 5801 spa_async_remove(spa, vd->vdev_child[c]); 5802} 5803 5804static void 5805spa_async_probe(spa_t *spa, vdev_t *vd) 5806{ 5807 if (vd->vdev_probe_wanted) { 5808 vd->vdev_probe_wanted = B_FALSE; 5809 vdev_reopen(vd); /* vdev_open() does the actual probe */ 5810 } 5811 5812 for (int c = 0; c < vd->vdev_children; c++) 5813 spa_async_probe(spa, vd->vdev_child[c]); 5814} 5815 5816static void 5817spa_async_autoexpand(spa_t *spa, vdev_t *vd) 5818{ 5819 sysevent_id_t eid; 5820 nvlist_t *attr; 5821 char *physpath; 5822 5823 if (!spa->spa_autoexpand) 5824 return; 5825 5826 for (int c = 0; c < vd->vdev_children; c++) { 5827 vdev_t *cvd = vd->vdev_child[c]; 5828 spa_async_autoexpand(spa, cvd); 5829 } 5830 5831 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 5832 return; 5833 5834 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 5835 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 5836 5837 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5838 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); 5839 5840 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, 5841 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP); 5842 5843 nvlist_free(attr); 5844 kmem_free(physpath, MAXPATHLEN); 5845} 5846 5847static void 5848spa_async_thread(void *arg) 5849{ 5850 spa_t *spa = arg; 5851 int tasks; 5852 5853 ASSERT(spa->spa_sync_on); 5854 5855 mutex_enter(&spa->spa_async_lock); 5856 tasks = spa->spa_async_tasks; 5857 spa->spa_async_tasks &= SPA_ASYNC_REMOVE; 5858 mutex_exit(&spa->spa_async_lock); 5859 5860 /* 5861 * See if the config needs to be updated. 5862 */ 5863 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 5864 uint64_t old_space, new_space; 5865 5866 mutex_enter(&spa_namespace_lock); 5867 old_space = metaslab_class_get_space(spa_normal_class(spa)); 5868 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5869 new_space = metaslab_class_get_space(spa_normal_class(spa)); 5870 mutex_exit(&spa_namespace_lock); 5871 5872 /* 5873 * If the pool grew as a result of the config update, 5874 * then log an internal history event. 5875 */ 5876 if (new_space != old_space) { 5877 spa_history_log_internal(spa, "vdev online", NULL, 5878 "pool '%s' size: %llu(+%llu)", 5879 spa_name(spa), new_space, new_space - old_space); 5880 } 5881 } 5882 5883 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 5884 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5885 spa_async_autoexpand(spa, spa->spa_root_vdev); 5886 spa_config_exit(spa, SCL_CONFIG, FTAG); 5887 } 5888 5889 /* 5890 * See if any devices need to be probed. 5891 */ 5892 if (tasks & SPA_ASYNC_PROBE) { 5893 spa_vdev_state_enter(spa, SCL_NONE); 5894 spa_async_probe(spa, spa->spa_root_vdev); 5895 (void) spa_vdev_state_exit(spa, NULL, 0); 5896 } 5897 5898 /* 5899 * If any devices are done replacing, detach them. 5900 */ 5901 if (tasks & SPA_ASYNC_RESILVER_DONE) 5902 spa_vdev_resilver_done(spa); 5903 5904 /* 5905 * Kick off a resilver. 5906 */ 5907 if (tasks & SPA_ASYNC_RESILVER) 5908 dsl_resilver_restart(spa->spa_dsl_pool, 0); 5909 5910 /* 5911 * Let the world know that we're done. 5912 */ 5913 mutex_enter(&spa->spa_async_lock); 5914 spa->spa_async_thread = NULL; 5915 cv_broadcast(&spa->spa_async_cv); 5916 mutex_exit(&spa->spa_async_lock); 5917 thread_exit(); 5918} 5919 5920static void 5921spa_async_thread_vd(void *arg) 5922{ 5923 spa_t *spa = arg; 5924 int tasks; 5925 5926 ASSERT(spa->spa_sync_on); 5927 5928 mutex_enter(&spa->spa_async_lock); 5929 tasks = spa->spa_async_tasks; 5930retry: 5931 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE; 5932 mutex_exit(&spa->spa_async_lock); 5933 5934 /* 5935 * See if any devices need to be marked REMOVED. 5936 */ 5937 if (tasks & SPA_ASYNC_REMOVE) { 5938 spa_vdev_state_enter(spa, SCL_NONE); 5939 spa_async_remove(spa, spa->spa_root_vdev); 5940 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 5941 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 5942 for (int i = 0; i < spa->spa_spares.sav_count; i++) 5943 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 5944 (void) spa_vdev_state_exit(spa, NULL, 0); 5945 } 5946 5947 /* 5948 * Let the world know that we're done. 5949 */ 5950 mutex_enter(&spa->spa_async_lock); 5951 tasks = spa->spa_async_tasks; 5952 if ((tasks & SPA_ASYNC_REMOVE) != 0) 5953 goto retry; 5954 spa->spa_async_thread_vd = NULL; 5955 cv_broadcast(&spa->spa_async_cv); 5956 mutex_exit(&spa->spa_async_lock); 5957 thread_exit(); 5958} 5959 5960void 5961spa_async_suspend(spa_t *spa) 5962{ 5963 mutex_enter(&spa->spa_async_lock); 5964 spa->spa_async_suspended++; 5965 while (spa->spa_async_thread != NULL && 5966 spa->spa_async_thread_vd != NULL) 5967 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 5968 mutex_exit(&spa->spa_async_lock); 5969} 5970 5971void 5972spa_async_resume(spa_t *spa) 5973{ 5974 mutex_enter(&spa->spa_async_lock); 5975 ASSERT(spa->spa_async_suspended != 0); 5976 spa->spa_async_suspended--; 5977 mutex_exit(&spa->spa_async_lock); 5978} 5979 5980static boolean_t 5981spa_async_tasks_pending(spa_t *spa) 5982{ 5983 uint_t non_config_tasks; 5984 uint_t config_task; 5985 boolean_t config_task_suspended; 5986 5987 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE | 5988 SPA_ASYNC_REMOVE); 5989 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; 5990 if (spa->spa_ccw_fail_time == 0) { 5991 config_task_suspended = B_FALSE; 5992 } else { 5993 config_task_suspended = 5994 (gethrtime() - spa->spa_ccw_fail_time) < 5995 (zfs_ccw_retry_interval * NANOSEC); 5996 } 5997 5998 return (non_config_tasks || (config_task && !config_task_suspended)); 5999} 6000 6001static void 6002spa_async_dispatch(spa_t *spa) 6003{ 6004 mutex_enter(&spa->spa_async_lock); 6005 if (spa_async_tasks_pending(spa) && 6006 !spa->spa_async_suspended && 6007 spa->spa_async_thread == NULL && 6008 rootdir != NULL) 6009 spa->spa_async_thread = thread_create(NULL, 0, 6010 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 6011 mutex_exit(&spa->spa_async_lock); 6012} 6013 6014static void 6015spa_async_dispatch_vd(spa_t *spa) 6016{ 6017 mutex_enter(&spa->spa_async_lock); 6018 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 && 6019 !spa->spa_async_suspended && 6020 spa->spa_async_thread_vd == NULL && 6021 rootdir != NULL) 6022 spa->spa_async_thread_vd = thread_create(NULL, 0, 6023 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri); 6024 mutex_exit(&spa->spa_async_lock); 6025} 6026 6027void 6028spa_async_request(spa_t *spa, int task) 6029{ 6030 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 6031 mutex_enter(&spa->spa_async_lock); 6032 spa->spa_async_tasks |= task; 6033 mutex_exit(&spa->spa_async_lock); 6034 spa_async_dispatch_vd(spa); 6035} 6036 6037/* 6038 * ========================================================================== 6039 * SPA syncing routines 6040 * ========================================================================== 6041 */ 6042 6043static int 6044bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6045{ 6046 bpobj_t *bpo = arg; 6047 bpobj_enqueue(bpo, bp, tx); 6048 return (0); 6049} 6050 6051static int 6052spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6053{ 6054 zio_t *zio = arg; 6055 6056 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 6057 BP_GET_PSIZE(bp), zio->io_flags)); 6058 return (0); 6059} 6060 6061/* 6062 * Note: this simple function is not inlined to make it easier to dtrace the 6063 * amount of time spent syncing frees. 6064 */ 6065static void 6066spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) 6067{ 6068 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6069 bplist_iterate(bpl, spa_free_sync_cb, zio, tx); 6070 VERIFY(zio_wait(zio) == 0); 6071} 6072 6073/* 6074 * Note: this simple function is not inlined to make it easier to dtrace the 6075 * amount of time spent syncing deferred frees. 6076 */ 6077static void 6078spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) 6079{ 6080 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6081 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, 6082 spa_free_sync_cb, zio, tx), ==, 0); 6083 VERIFY0(zio_wait(zio)); 6084} 6085 6086 6087static void 6088spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 6089{ 6090 char *packed = NULL; 6091 size_t bufsize; 6092 size_t nvsize = 0; 6093 dmu_buf_t *db; 6094 6095 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 6096 6097 /* 6098 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 6099 * information. This avoids the dbuf_will_dirty() path and 6100 * saves us a pre-read to get data we don't actually care about. 6101 */ 6102 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 6103 packed = kmem_alloc(bufsize, KM_SLEEP); 6104 6105 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 6106 KM_SLEEP) == 0); 6107 bzero(packed + nvsize, bufsize - nvsize); 6108 6109 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 6110 6111 kmem_free(packed, bufsize); 6112 6113 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 6114 dmu_buf_will_dirty(db, tx); 6115 *(uint64_t *)db->db_data = nvsize; 6116 dmu_buf_rele(db, FTAG); 6117} 6118 6119static void 6120spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 6121 const char *config, const char *entry) 6122{ 6123 nvlist_t *nvroot; 6124 nvlist_t **list; 6125 int i; 6126 6127 if (!sav->sav_sync) 6128 return; 6129 6130 /* 6131 * Update the MOS nvlist describing the list of available devices. 6132 * spa_validate_aux() will have already made sure this nvlist is 6133 * valid and the vdevs are labeled appropriately. 6134 */ 6135 if (sav->sav_object == 0) { 6136 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 6137 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 6138 sizeof (uint64_t), tx); 6139 VERIFY(zap_update(spa->spa_meta_objset, 6140 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 6141 &sav->sav_object, tx) == 0); 6142 } 6143 6144 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 6145 if (sav->sav_count == 0) { 6146 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 6147 } else { 6148 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 6149 for (i = 0; i < sav->sav_count; i++) 6150 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 6151 B_FALSE, VDEV_CONFIG_L2CACHE); 6152 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 6153 sav->sav_count) == 0); 6154 for (i = 0; i < sav->sav_count; i++) 6155 nvlist_free(list[i]); 6156 kmem_free(list, sav->sav_count * sizeof (void *)); 6157 } 6158 6159 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 6160 nvlist_free(nvroot); 6161 6162 sav->sav_sync = B_FALSE; 6163} 6164 6165static void 6166spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 6167{ 6168 nvlist_t *config; 6169 6170 if (list_is_empty(&spa->spa_config_dirty_list)) 6171 return; 6172 6173 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6174 6175 config = spa_config_generate(spa, spa->spa_root_vdev, 6176 dmu_tx_get_txg(tx), B_FALSE); 6177 6178 /* 6179 * If we're upgrading the spa version then make sure that 6180 * the config object gets updated with the correct version. 6181 */ 6182 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) 6183 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 6184 spa->spa_uberblock.ub_version); 6185 6186 spa_config_exit(spa, SCL_STATE, FTAG); 6187 6188 if (spa->spa_config_syncing) 6189 nvlist_free(spa->spa_config_syncing); 6190 spa->spa_config_syncing = config; 6191 6192 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 6193} 6194 6195static void 6196spa_sync_version(void *arg, dmu_tx_t *tx) 6197{ 6198 uint64_t *versionp = arg; 6199 uint64_t version = *versionp; 6200 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6201 6202 /* 6203 * Setting the version is special cased when first creating the pool. 6204 */ 6205 ASSERT(tx->tx_txg != TXG_INITIAL); 6206 6207 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 6208 ASSERT(version >= spa_version(spa)); 6209 6210 spa->spa_uberblock.ub_version = version; 6211 vdev_config_dirty(spa->spa_root_vdev); 6212 spa_history_log_internal(spa, "set", tx, "version=%lld", version); 6213} 6214 6215/* 6216 * Set zpool properties. 6217 */ 6218static void 6219spa_sync_props(void *arg, dmu_tx_t *tx) 6220{ 6221 nvlist_t *nvp = arg; 6222 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6223 objset_t *mos = spa->spa_meta_objset; 6224 nvpair_t *elem = NULL; 6225 6226 mutex_enter(&spa->spa_props_lock); 6227 6228 while ((elem = nvlist_next_nvpair(nvp, elem))) { 6229 uint64_t intval; 6230 char *strval, *fname; 6231 zpool_prop_t prop; 6232 const char *propname; 6233 zprop_type_t proptype; 6234 spa_feature_t fid; 6235 6236 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 6237 case ZPROP_INVAL: 6238 /* 6239 * We checked this earlier in spa_prop_validate(). 6240 */ 6241 ASSERT(zpool_prop_feature(nvpair_name(elem))); 6242 6243 fname = strchr(nvpair_name(elem), '@') + 1; 6244 VERIFY0(zfeature_lookup_name(fname, &fid)); 6245 6246 spa_feature_enable(spa, fid, tx); 6247 spa_history_log_internal(spa, "set", tx, 6248 "%s=enabled", nvpair_name(elem)); 6249 break; 6250 6251 case ZPOOL_PROP_VERSION: 6252 intval = fnvpair_value_uint64(elem); 6253 /* 6254 * The version is synced seperatly before other 6255 * properties and should be correct by now. 6256 */ 6257 ASSERT3U(spa_version(spa), >=, intval); 6258 break; 6259 6260 case ZPOOL_PROP_ALTROOT: 6261 /* 6262 * 'altroot' is a non-persistent property. It should 6263 * have been set temporarily at creation or import time. 6264 */ 6265 ASSERT(spa->spa_root != NULL); 6266 break; 6267 6268 case ZPOOL_PROP_READONLY: 6269 case ZPOOL_PROP_CACHEFILE: 6270 /* 6271 * 'readonly' and 'cachefile' are also non-persisitent 6272 * properties. 6273 */ 6274 break; 6275 case ZPOOL_PROP_COMMENT: 6276 strval = fnvpair_value_string(elem); 6277 if (spa->spa_comment != NULL) 6278 spa_strfree(spa->spa_comment); 6279 spa->spa_comment = spa_strdup(strval); 6280 /* 6281 * We need to dirty the configuration on all the vdevs 6282 * so that their labels get updated. It's unnecessary 6283 * to do this for pool creation since the vdev's 6284 * configuratoin has already been dirtied. 6285 */ 6286 if (tx->tx_txg != TXG_INITIAL) 6287 vdev_config_dirty(spa->spa_root_vdev); 6288 spa_history_log_internal(spa, "set", tx, 6289 "%s=%s", nvpair_name(elem), strval); 6290 break; 6291 default: 6292 /* 6293 * Set pool property values in the poolprops mos object. 6294 */ 6295 if (spa->spa_pool_props_object == 0) { 6296 spa->spa_pool_props_object = 6297 zap_create_link(mos, DMU_OT_POOL_PROPS, 6298 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 6299 tx); 6300 } 6301 6302 /* normalize the property name */ 6303 propname = zpool_prop_to_name(prop); 6304 proptype = zpool_prop_get_type(prop); 6305 6306 if (nvpair_type(elem) == DATA_TYPE_STRING) { 6307 ASSERT(proptype == PROP_TYPE_STRING); 6308 strval = fnvpair_value_string(elem); 6309 VERIFY0(zap_update(mos, 6310 spa->spa_pool_props_object, propname, 6311 1, strlen(strval) + 1, strval, tx)); 6312 spa_history_log_internal(spa, "set", tx, 6313 "%s=%s", nvpair_name(elem), strval); 6314 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 6315 intval = fnvpair_value_uint64(elem); 6316 6317 if (proptype == PROP_TYPE_INDEX) { 6318 const char *unused; 6319 VERIFY0(zpool_prop_index_to_string( 6320 prop, intval, &unused)); 6321 } 6322 VERIFY0(zap_update(mos, 6323 spa->spa_pool_props_object, propname, 6324 8, 1, &intval, tx)); 6325 spa_history_log_internal(spa, "set", tx, 6326 "%s=%lld", nvpair_name(elem), intval); 6327 } else { 6328 ASSERT(0); /* not allowed */ 6329 } 6330 6331 switch (prop) { 6332 case ZPOOL_PROP_DELEGATION: 6333 spa->spa_delegation = intval; 6334 break; 6335 case ZPOOL_PROP_BOOTFS: 6336 spa->spa_bootfs = intval; 6337 break; 6338 case ZPOOL_PROP_FAILUREMODE: 6339 spa->spa_failmode = intval; 6340 break; 6341 case ZPOOL_PROP_AUTOEXPAND: 6342 spa->spa_autoexpand = intval; 6343 if (tx->tx_txg != TXG_INITIAL) 6344 spa_async_request(spa, 6345 SPA_ASYNC_AUTOEXPAND); 6346 break; 6347 case ZPOOL_PROP_DEDUPDITTO: 6348 spa->spa_dedup_ditto = intval; 6349 break; 6350 default: 6351 break; 6352 } 6353 } 6354 6355 } 6356 6357 mutex_exit(&spa->spa_props_lock); 6358} 6359 6360/* 6361 * Perform one-time upgrade on-disk changes. spa_version() does not 6362 * reflect the new version this txg, so there must be no changes this 6363 * txg to anything that the upgrade code depends on after it executes. 6364 * Therefore this must be called after dsl_pool_sync() does the sync 6365 * tasks. 6366 */ 6367static void 6368spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 6369{ 6370 dsl_pool_t *dp = spa->spa_dsl_pool; 6371 6372 ASSERT(spa->spa_sync_pass == 1); 6373 6374 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); 6375 6376 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 6377 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 6378 dsl_pool_create_origin(dp, tx); 6379 6380 /* Keeping the origin open increases spa_minref */ 6381 spa->spa_minref += 3; 6382 } 6383 6384 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 6385 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 6386 dsl_pool_upgrade_clones(dp, tx); 6387 } 6388 6389 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 6390 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 6391 dsl_pool_upgrade_dir_clones(dp, tx); 6392 6393 /* Keeping the freedir open increases spa_minref */ 6394 spa->spa_minref += 3; 6395 } 6396 6397 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 6398 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6399 spa_feature_create_zap_objects(spa, tx); 6400 } 6401 rrw_exit(&dp->dp_config_rwlock, FTAG); 6402} 6403 6404/* 6405 * Sync the specified transaction group. New blocks may be dirtied as 6406 * part of the process, so we iterate until it converges. 6407 */ 6408void 6409spa_sync(spa_t *spa, uint64_t txg) 6410{ 6411 dsl_pool_t *dp = spa->spa_dsl_pool; 6412 objset_t *mos = spa->spa_meta_objset; 6413 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 6414 vdev_t *rvd = spa->spa_root_vdev; 6415 vdev_t *vd; 6416 dmu_tx_t *tx; 6417 int error; 6418 6419 VERIFY(spa_writeable(spa)); 6420 6421 /* 6422 * Lock out configuration changes. 6423 */ 6424 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 6425 6426 spa->spa_syncing_txg = txg; 6427 spa->spa_sync_pass = 0; 6428 6429 /* 6430 * If there are any pending vdev state changes, convert them 6431 * into config changes that go out with this transaction group. 6432 */ 6433 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6434 while (list_head(&spa->spa_state_dirty_list) != NULL) { 6435 /* 6436 * We need the write lock here because, for aux vdevs, 6437 * calling vdev_config_dirty() modifies sav_config. 6438 * This is ugly and will become unnecessary when we 6439 * eliminate the aux vdev wart by integrating all vdevs 6440 * into the root vdev tree. 6441 */ 6442 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6443 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 6444 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 6445 vdev_state_clean(vd); 6446 vdev_config_dirty(vd); 6447 } 6448 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6449 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6450 } 6451 spa_config_exit(spa, SCL_STATE, FTAG); 6452 6453 tx = dmu_tx_create_assigned(dp, txg); 6454 6455 spa->spa_sync_starttime = gethrtime(); 6456#ifdef illumos 6457 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, 6458 spa->spa_sync_starttime + spa->spa_deadman_synctime)); 6459#else /* FreeBSD */ 6460#ifdef _KERNEL 6461 callout_reset(&spa->spa_deadman_cycid, 6462 hz * spa->spa_deadman_synctime / NANOSEC, spa_deadman, spa); 6463#endif 6464#endif 6465 6466 /* 6467 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 6468 * set spa_deflate if we have no raid-z vdevs. 6469 */ 6470 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 6471 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 6472 int i; 6473 6474 for (i = 0; i < rvd->vdev_children; i++) { 6475 vd = rvd->vdev_child[i]; 6476 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 6477 break; 6478 } 6479 if (i == rvd->vdev_children) { 6480 spa->spa_deflate = TRUE; 6481 VERIFY(0 == zap_add(spa->spa_meta_objset, 6482 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 6483 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 6484 } 6485 } 6486 6487 /* 6488 * If anything has changed in this txg, or if someone is waiting 6489 * for this txg to sync (eg, spa_vdev_remove()), push the 6490 * deferred frees from the previous txg. If not, leave them 6491 * alone so that we don't generate work on an otherwise idle 6492 * system. 6493 */ 6494 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || 6495 !txg_list_empty(&dp->dp_dirty_dirs, txg) || 6496 !txg_list_empty(&dp->dp_sync_tasks, txg) || 6497 ((dsl_scan_active(dp->dp_scan) || 6498 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) { 6499 spa_sync_deferred_frees(spa, tx); 6500 } 6501 6502 /* 6503 * Iterate to convergence. 6504 */ 6505 do { 6506 int pass = ++spa->spa_sync_pass; 6507 6508 spa_sync_config_object(spa, tx); 6509 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 6510 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 6511 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 6512 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 6513 spa_errlog_sync(spa, txg); 6514 dsl_pool_sync(dp, txg); 6515 6516 if (pass < zfs_sync_pass_deferred_free) { 6517 spa_sync_frees(spa, free_bpl, tx); 6518 } else { 6519 bplist_iterate(free_bpl, bpobj_enqueue_cb, 6520 &spa->spa_deferred_bpobj, tx); 6521 } 6522 6523 ddt_sync(spa, txg); 6524 dsl_scan_sync(dp, tx); 6525 6526 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 6527 vdev_sync(vd, txg); 6528 6529 if (pass == 1) 6530 spa_sync_upgrades(spa, tx); 6531 6532 } while (dmu_objset_is_dirty(mos, txg)); 6533 6534 /* 6535 * Rewrite the vdev configuration (which includes the uberblock) 6536 * to commit the transaction group. 6537 * 6538 * If there are no dirty vdevs, we sync the uberblock to a few 6539 * random top-level vdevs that are known to be visible in the 6540 * config cache (see spa_vdev_add() for a complete description). 6541 * If there *are* dirty vdevs, sync the uberblock to all vdevs. 6542 */ 6543 for (;;) { 6544 /* 6545 * We hold SCL_STATE to prevent vdev open/close/etc. 6546 * while we're attempting to write the vdev labels. 6547 */ 6548 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6549 6550 if (list_is_empty(&spa->spa_config_dirty_list)) { 6551 vdev_t *svd[SPA_DVAS_PER_BP]; 6552 int svdcount = 0; 6553 int children = rvd->vdev_children; 6554 int c0 = spa_get_random(children); 6555 6556 for (int c = 0; c < children; c++) { 6557 vd = rvd->vdev_child[(c0 + c) % children]; 6558 if (vd->vdev_ms_array == 0 || vd->vdev_islog) 6559 continue; 6560 svd[svdcount++] = vd; 6561 if (svdcount == SPA_DVAS_PER_BP) 6562 break; 6563 } 6564 error = vdev_config_sync(svd, svdcount, txg, B_FALSE); 6565 if (error != 0) 6566 error = vdev_config_sync(svd, svdcount, txg, 6567 B_TRUE); 6568 } else { 6569 error = vdev_config_sync(rvd->vdev_child, 6570 rvd->vdev_children, txg, B_FALSE); 6571 if (error != 0) 6572 error = vdev_config_sync(rvd->vdev_child, 6573 rvd->vdev_children, txg, B_TRUE); 6574 } 6575 6576 if (error == 0) 6577 spa->spa_last_synced_guid = rvd->vdev_guid; 6578 6579 spa_config_exit(spa, SCL_STATE, FTAG); 6580 6581 if (error == 0) 6582 break; 6583 zio_suspend(spa, NULL); 6584 zio_resume_wait(spa); 6585 } 6586 dmu_tx_commit(tx); 6587 6588#ifdef illumos 6589 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 6590#else /* FreeBSD */ 6591#ifdef _KERNEL 6592 callout_drain(&spa->spa_deadman_cycid); 6593#endif 6594#endif 6595 6596 /* 6597 * Clear the dirty config list. 6598 */ 6599 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 6600 vdev_config_clean(vd); 6601 6602 /* 6603 * Now that the new config has synced transactionally, 6604 * let it become visible to the config cache. 6605 */ 6606 if (spa->spa_config_syncing != NULL) { 6607 spa_config_set(spa, spa->spa_config_syncing); 6608 spa->spa_config_txg = txg; 6609 spa->spa_config_syncing = NULL; 6610 } 6611 6612 spa->spa_ubsync = spa->spa_uberblock; 6613 6614 dsl_pool_sync_done(dp, txg); 6615 6616 /* 6617 * Update usable space statistics. 6618 */ 6619 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 6620 vdev_sync_done(vd, txg); 6621 6622 spa_update_dspace(spa); 6623 6624 /* 6625 * It had better be the case that we didn't dirty anything 6626 * since vdev_config_sync(). 6627 */ 6628 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 6629 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 6630 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 6631 6632 spa->spa_sync_pass = 0; 6633 6634 spa_config_exit(spa, SCL_CONFIG, FTAG); 6635 6636 spa_handle_ignored_writes(spa); 6637 6638 /* 6639 * If any async tasks have been requested, kick them off. 6640 */ 6641 spa_async_dispatch(spa); 6642 spa_async_dispatch_vd(spa); 6643} 6644 6645/* 6646 * Sync all pools. We don't want to hold the namespace lock across these 6647 * operations, so we take a reference on the spa_t and drop the lock during the 6648 * sync. 6649 */ 6650void 6651spa_sync_allpools(void) 6652{ 6653 spa_t *spa = NULL; 6654 mutex_enter(&spa_namespace_lock); 6655 while ((spa = spa_next(spa)) != NULL) { 6656 if (spa_state(spa) != POOL_STATE_ACTIVE || 6657 !spa_writeable(spa) || spa_suspended(spa)) 6658 continue; 6659 spa_open_ref(spa, FTAG); 6660 mutex_exit(&spa_namespace_lock); 6661 txg_wait_synced(spa_get_dsl(spa), 0); 6662 mutex_enter(&spa_namespace_lock); 6663 spa_close(spa, FTAG); 6664 } 6665 mutex_exit(&spa_namespace_lock); 6666} 6667 6668/* 6669 * ========================================================================== 6670 * Miscellaneous routines 6671 * ========================================================================== 6672 */ 6673 6674/* 6675 * Remove all pools in the system. 6676 */ 6677void 6678spa_evict_all(void) 6679{ 6680 spa_t *spa; 6681 6682 /* 6683 * Remove all cached state. All pools should be closed now, 6684 * so every spa in the AVL tree should be unreferenced. 6685 */ 6686 mutex_enter(&spa_namespace_lock); 6687 while ((spa = spa_next(NULL)) != NULL) { 6688 /* 6689 * Stop async tasks. The async thread may need to detach 6690 * a device that's been replaced, which requires grabbing 6691 * spa_namespace_lock, so we must drop it here. 6692 */ 6693 spa_open_ref(spa, FTAG); 6694 mutex_exit(&spa_namespace_lock); 6695 spa_async_suspend(spa); 6696 mutex_enter(&spa_namespace_lock); 6697 spa_close(spa, FTAG); 6698 6699 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 6700 spa_unload(spa); 6701 spa_deactivate(spa); 6702 } 6703 spa_remove(spa); 6704 } 6705 mutex_exit(&spa_namespace_lock); 6706} 6707 6708vdev_t * 6709spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 6710{ 6711 vdev_t *vd; 6712 int i; 6713 6714 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 6715 return (vd); 6716 6717 if (aux) { 6718 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 6719 vd = spa->spa_l2cache.sav_vdevs[i]; 6720 if (vd->vdev_guid == guid) 6721 return (vd); 6722 } 6723 6724 for (i = 0; i < spa->spa_spares.sav_count; i++) { 6725 vd = spa->spa_spares.sav_vdevs[i]; 6726 if (vd->vdev_guid == guid) 6727 return (vd); 6728 } 6729 } 6730 6731 return (NULL); 6732} 6733 6734void 6735spa_upgrade(spa_t *spa, uint64_t version) 6736{ 6737 ASSERT(spa_writeable(spa)); 6738 6739 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 6740 6741 /* 6742 * This should only be called for a non-faulted pool, and since a 6743 * future version would result in an unopenable pool, this shouldn't be 6744 * possible. 6745 */ 6746 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); 6747 ASSERT(version >= spa->spa_uberblock.ub_version); 6748 6749 spa->spa_uberblock.ub_version = version; 6750 vdev_config_dirty(spa->spa_root_vdev); 6751 6752 spa_config_exit(spa, SCL_ALL, FTAG); 6753 6754 txg_wait_synced(spa_get_dsl(spa), 0); 6755} 6756 6757boolean_t 6758spa_has_spare(spa_t *spa, uint64_t guid) 6759{ 6760 int i; 6761 uint64_t spareguid; 6762 spa_aux_vdev_t *sav = &spa->spa_spares; 6763 6764 for (i = 0; i < sav->sav_count; i++) 6765 if (sav->sav_vdevs[i]->vdev_guid == guid) 6766 return (B_TRUE); 6767 6768 for (i = 0; i < sav->sav_npending; i++) { 6769 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 6770 &spareguid) == 0 && spareguid == guid) 6771 return (B_TRUE); 6772 } 6773 6774 return (B_FALSE); 6775} 6776 6777/* 6778 * Check if a pool has an active shared spare device. 6779 * Note: reference count of an active spare is 2, as a spare and as a replace 6780 */ 6781static boolean_t 6782spa_has_active_shared_spare(spa_t *spa) 6783{ 6784 int i, refcnt; 6785 uint64_t pool; 6786 spa_aux_vdev_t *sav = &spa->spa_spares; 6787 6788 for (i = 0; i < sav->sav_count; i++) { 6789 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 6790 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 6791 refcnt > 2) 6792 return (B_TRUE); 6793 } 6794 6795 return (B_FALSE); 6796} 6797 6798/* 6799 * Post a sysevent corresponding to the given event. The 'name' must be one of 6800 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 6801 * filled in from the spa and (optionally) the vdev. This doesn't do anything 6802 * in the userland libzpool, as we don't want consumers to misinterpret ztest 6803 * or zdb as real changes. 6804 */ 6805void 6806spa_event_notify(spa_t *spa, vdev_t *vd, const char *name) 6807{ 6808#ifdef _KERNEL 6809 sysevent_t *ev; 6810 sysevent_attr_list_t *attr = NULL; 6811 sysevent_value_t value; 6812 sysevent_id_t eid; 6813 6814 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 6815 SE_SLEEP); 6816 6817 value.value_type = SE_DATA_TYPE_STRING; 6818 value.value.sv_string = spa_name(spa); 6819 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 6820 goto done; 6821 6822 value.value_type = SE_DATA_TYPE_UINT64; 6823 value.value.sv_uint64 = spa_guid(spa); 6824 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 6825 goto done; 6826 6827 if (vd) { 6828 value.value_type = SE_DATA_TYPE_UINT64; 6829 value.value.sv_uint64 = vd->vdev_guid; 6830 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 6831 SE_SLEEP) != 0) 6832 goto done; 6833 6834 if (vd->vdev_path) { 6835 value.value_type = SE_DATA_TYPE_STRING; 6836 value.value.sv_string = vd->vdev_path; 6837 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 6838 &value, SE_SLEEP) != 0) 6839 goto done; 6840 } 6841 } 6842 6843 if (sysevent_attach_attributes(ev, attr) != 0) 6844 goto done; 6845 attr = NULL; 6846 6847 (void) log_sysevent(ev, SE_SLEEP, &eid); 6848 6849done: 6850 if (attr) 6851 sysevent_free_attr(attr); 6852 sysevent_free(ev); 6853#endif 6854} 6855