spa.c revision 267038
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2011, 2014 by Delphix. All rights reserved. 25 * Copyright 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_P(12, 8), 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#ifdef _KERNEL 957 tq = tqs->stqs_taskq[cpu_ticks() % tqs->stqs_count]; 958#else 959 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 960#endif 961 } 962 963 taskq_dispatch_ent(tq, func, arg, flags, ent); 964} 965 966static void 967spa_create_zio_taskqs(spa_t *spa) 968{ 969 for (int t = 0; t < ZIO_TYPES; t++) { 970 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 971 spa_taskqs_init(spa, t, q); 972 } 973 } 974} 975 976#ifdef _KERNEL 977#ifdef SPA_PROCESS 978static void 979spa_thread(void *arg) 980{ 981 callb_cpr_t cprinfo; 982 983 spa_t *spa = arg; 984 user_t *pu = PTOU(curproc); 985 986 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 987 spa->spa_name); 988 989 ASSERT(curproc != &p0); 990 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 991 "zpool-%s", spa->spa_name); 992 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 993 994#ifdef PSRSET_BIND 995 /* bind this thread to the requested psrset */ 996 if (zio_taskq_psrset_bind != PS_NONE) { 997 pool_lock(); 998 mutex_enter(&cpu_lock); 999 mutex_enter(&pidlock); 1000 mutex_enter(&curproc->p_lock); 1001 1002 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 1003 0, NULL, NULL) == 0) { 1004 curthread->t_bind_pset = zio_taskq_psrset_bind; 1005 } else { 1006 cmn_err(CE_WARN, 1007 "Couldn't bind process for zfs pool \"%s\" to " 1008 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1009 } 1010 1011 mutex_exit(&curproc->p_lock); 1012 mutex_exit(&pidlock); 1013 mutex_exit(&cpu_lock); 1014 pool_unlock(); 1015 } 1016#endif 1017 1018#ifdef SYSDC 1019 if (zio_taskq_sysdc) { 1020 sysdc_thread_enter(curthread, 100, 0); 1021 } 1022#endif 1023 1024 spa->spa_proc = curproc; 1025 spa->spa_did = curthread->t_did; 1026 1027 spa_create_zio_taskqs(spa); 1028 1029 mutex_enter(&spa->spa_proc_lock); 1030 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1031 1032 spa->spa_proc_state = SPA_PROC_ACTIVE; 1033 cv_broadcast(&spa->spa_proc_cv); 1034 1035 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1036 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1037 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1038 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1039 1040 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1041 spa->spa_proc_state = SPA_PROC_GONE; 1042 spa->spa_proc = &p0; 1043 cv_broadcast(&spa->spa_proc_cv); 1044 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1045 1046 mutex_enter(&curproc->p_lock); 1047 lwp_exit(); 1048} 1049#endif /* SPA_PROCESS */ 1050#endif 1051 1052/* 1053 * Activate an uninitialized pool. 1054 */ 1055static void 1056spa_activate(spa_t *spa, int mode) 1057{ 1058 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1059 1060 spa->spa_state = POOL_STATE_ACTIVE; 1061 spa->spa_mode = mode; 1062 1063 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1064 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1065 1066 /* Try to create a covering process */ 1067 mutex_enter(&spa->spa_proc_lock); 1068 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1069 ASSERT(spa->spa_proc == &p0); 1070 spa->spa_did = 0; 1071 1072#ifdef SPA_PROCESS 1073 /* Only create a process if we're going to be around a while. */ 1074 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1075 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1076 NULL, 0) == 0) { 1077 spa->spa_proc_state = SPA_PROC_CREATED; 1078 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1079 cv_wait(&spa->spa_proc_cv, 1080 &spa->spa_proc_lock); 1081 } 1082 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1083 ASSERT(spa->spa_proc != &p0); 1084 ASSERT(spa->spa_did != 0); 1085 } else { 1086#ifdef _KERNEL 1087 cmn_err(CE_WARN, 1088 "Couldn't create process for zfs pool \"%s\"\n", 1089 spa->spa_name); 1090#endif 1091 } 1092 } 1093#endif /* SPA_PROCESS */ 1094 mutex_exit(&spa->spa_proc_lock); 1095 1096 /* If we didn't create a process, we need to create our taskqs. */ 1097 ASSERT(spa->spa_proc == &p0); 1098 if (spa->spa_proc == &p0) { 1099 spa_create_zio_taskqs(spa); 1100 } 1101 1102 /* 1103 * Start TRIM thread. 1104 */ 1105 trim_thread_create(spa); 1106 1107 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1108 offsetof(vdev_t, vdev_config_dirty_node)); 1109 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1110 offsetof(vdev_t, vdev_state_dirty_node)); 1111 1112 txg_list_create(&spa->spa_vdev_txg_list, 1113 offsetof(struct vdev, vdev_txg_node)); 1114 1115 avl_create(&spa->spa_errlist_scrub, 1116 spa_error_entry_compare, sizeof (spa_error_entry_t), 1117 offsetof(spa_error_entry_t, se_avl)); 1118 avl_create(&spa->spa_errlist_last, 1119 spa_error_entry_compare, sizeof (spa_error_entry_t), 1120 offsetof(spa_error_entry_t, se_avl)); 1121} 1122 1123/* 1124 * Opposite of spa_activate(). 1125 */ 1126static void 1127spa_deactivate(spa_t *spa) 1128{ 1129 ASSERT(spa->spa_sync_on == B_FALSE); 1130 ASSERT(spa->spa_dsl_pool == NULL); 1131 ASSERT(spa->spa_root_vdev == NULL); 1132 ASSERT(spa->spa_async_zio_root == NULL); 1133 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1134 1135 /* 1136 * Stop TRIM thread in case spa_unload() wasn't called directly 1137 * before spa_deactivate(). 1138 */ 1139 trim_thread_destroy(spa); 1140 1141 txg_list_destroy(&spa->spa_vdev_txg_list); 1142 1143 list_destroy(&spa->spa_config_dirty_list); 1144 list_destroy(&spa->spa_state_dirty_list); 1145 1146 for (int t = 0; t < ZIO_TYPES; t++) { 1147 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1148 spa_taskqs_fini(spa, t, q); 1149 } 1150 } 1151 1152 metaslab_class_destroy(spa->spa_normal_class); 1153 spa->spa_normal_class = NULL; 1154 1155 metaslab_class_destroy(spa->spa_log_class); 1156 spa->spa_log_class = NULL; 1157 1158 /* 1159 * If this was part of an import or the open otherwise failed, we may 1160 * still have errors left in the queues. Empty them just in case. 1161 */ 1162 spa_errlog_drain(spa); 1163 1164 avl_destroy(&spa->spa_errlist_scrub); 1165 avl_destroy(&spa->spa_errlist_last); 1166 1167 spa->spa_state = POOL_STATE_UNINITIALIZED; 1168 1169 mutex_enter(&spa->spa_proc_lock); 1170 if (spa->spa_proc_state != SPA_PROC_NONE) { 1171 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1172 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1173 cv_broadcast(&spa->spa_proc_cv); 1174 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1175 ASSERT(spa->spa_proc != &p0); 1176 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1177 } 1178 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1179 spa->spa_proc_state = SPA_PROC_NONE; 1180 } 1181 ASSERT(spa->spa_proc == &p0); 1182 mutex_exit(&spa->spa_proc_lock); 1183 1184#ifdef SPA_PROCESS 1185 /* 1186 * We want to make sure spa_thread() has actually exited the ZFS 1187 * module, so that the module can't be unloaded out from underneath 1188 * it. 1189 */ 1190 if (spa->spa_did != 0) { 1191 thread_join(spa->spa_did); 1192 spa->spa_did = 0; 1193 } 1194#endif /* SPA_PROCESS */ 1195} 1196 1197/* 1198 * Verify a pool configuration, and construct the vdev tree appropriately. This 1199 * will create all the necessary vdevs in the appropriate layout, with each vdev 1200 * in the CLOSED state. This will prep the pool before open/creation/import. 1201 * All vdev validation is done by the vdev_alloc() routine. 1202 */ 1203static int 1204spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1205 uint_t id, int atype) 1206{ 1207 nvlist_t **child; 1208 uint_t children; 1209 int error; 1210 1211 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1212 return (error); 1213 1214 if ((*vdp)->vdev_ops->vdev_op_leaf) 1215 return (0); 1216 1217 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1218 &child, &children); 1219 1220 if (error == ENOENT) 1221 return (0); 1222 1223 if (error) { 1224 vdev_free(*vdp); 1225 *vdp = NULL; 1226 return (SET_ERROR(EINVAL)); 1227 } 1228 1229 for (int c = 0; c < children; c++) { 1230 vdev_t *vd; 1231 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1232 atype)) != 0) { 1233 vdev_free(*vdp); 1234 *vdp = NULL; 1235 return (error); 1236 } 1237 } 1238 1239 ASSERT(*vdp != NULL); 1240 1241 return (0); 1242} 1243 1244/* 1245 * Opposite of spa_load(). 1246 */ 1247static void 1248spa_unload(spa_t *spa) 1249{ 1250 int i; 1251 1252 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1253 1254 /* 1255 * Stop TRIM thread. 1256 */ 1257 trim_thread_destroy(spa); 1258 1259 /* 1260 * Stop async tasks. 1261 */ 1262 spa_async_suspend(spa); 1263 1264 /* 1265 * Stop syncing. 1266 */ 1267 if (spa->spa_sync_on) { 1268 txg_sync_stop(spa->spa_dsl_pool); 1269 spa->spa_sync_on = B_FALSE; 1270 } 1271 1272 /* 1273 * Wait for any outstanding async I/O to complete. 1274 */ 1275 if (spa->spa_async_zio_root != NULL) { 1276 (void) zio_wait(spa->spa_async_zio_root); 1277 spa->spa_async_zio_root = NULL; 1278 } 1279 1280 bpobj_close(&spa->spa_deferred_bpobj); 1281 1282 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1283 1284 /* 1285 * Close all vdevs. 1286 */ 1287 if (spa->spa_root_vdev) 1288 vdev_free(spa->spa_root_vdev); 1289 ASSERT(spa->spa_root_vdev == NULL); 1290 1291 /* 1292 * Close the dsl pool. 1293 */ 1294 if (spa->spa_dsl_pool) { 1295 dsl_pool_close(spa->spa_dsl_pool); 1296 spa->spa_dsl_pool = NULL; 1297 spa->spa_meta_objset = NULL; 1298 } 1299 1300 ddt_unload(spa); 1301 1302 1303 /* 1304 * Drop and purge level 2 cache 1305 */ 1306 spa_l2cache_drop(spa); 1307 1308 for (i = 0; i < spa->spa_spares.sav_count; i++) 1309 vdev_free(spa->spa_spares.sav_vdevs[i]); 1310 if (spa->spa_spares.sav_vdevs) { 1311 kmem_free(spa->spa_spares.sav_vdevs, 1312 spa->spa_spares.sav_count * sizeof (void *)); 1313 spa->spa_spares.sav_vdevs = NULL; 1314 } 1315 if (spa->spa_spares.sav_config) { 1316 nvlist_free(spa->spa_spares.sav_config); 1317 spa->spa_spares.sav_config = NULL; 1318 } 1319 spa->spa_spares.sav_count = 0; 1320 1321 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1322 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1323 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1324 } 1325 if (spa->spa_l2cache.sav_vdevs) { 1326 kmem_free(spa->spa_l2cache.sav_vdevs, 1327 spa->spa_l2cache.sav_count * sizeof (void *)); 1328 spa->spa_l2cache.sav_vdevs = NULL; 1329 } 1330 if (spa->spa_l2cache.sav_config) { 1331 nvlist_free(spa->spa_l2cache.sav_config); 1332 spa->spa_l2cache.sav_config = NULL; 1333 } 1334 spa->spa_l2cache.sav_count = 0; 1335 1336 spa->spa_async_suspended = 0; 1337 1338 if (spa->spa_comment != NULL) { 1339 spa_strfree(spa->spa_comment); 1340 spa->spa_comment = NULL; 1341 } 1342 1343 spa_config_exit(spa, SCL_ALL, FTAG); 1344} 1345 1346/* 1347 * Load (or re-load) the current list of vdevs describing the active spares for 1348 * this pool. When this is called, we have some form of basic information in 1349 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1350 * then re-generate a more complete list including status information. 1351 */ 1352static void 1353spa_load_spares(spa_t *spa) 1354{ 1355 nvlist_t **spares; 1356 uint_t nspares; 1357 int i; 1358 vdev_t *vd, *tvd; 1359 1360 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1361 1362 /* 1363 * First, close and free any existing spare vdevs. 1364 */ 1365 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1366 vd = spa->spa_spares.sav_vdevs[i]; 1367 1368 /* Undo the call to spa_activate() below */ 1369 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1370 B_FALSE)) != NULL && tvd->vdev_isspare) 1371 spa_spare_remove(tvd); 1372 vdev_close(vd); 1373 vdev_free(vd); 1374 } 1375 1376 if (spa->spa_spares.sav_vdevs) 1377 kmem_free(spa->spa_spares.sav_vdevs, 1378 spa->spa_spares.sav_count * sizeof (void *)); 1379 1380 if (spa->spa_spares.sav_config == NULL) 1381 nspares = 0; 1382 else 1383 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1384 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1385 1386 spa->spa_spares.sav_count = (int)nspares; 1387 spa->spa_spares.sav_vdevs = NULL; 1388 1389 if (nspares == 0) 1390 return; 1391 1392 /* 1393 * Construct the array of vdevs, opening them to get status in the 1394 * process. For each spare, there is potentially two different vdev_t 1395 * structures associated with it: one in the list of spares (used only 1396 * for basic validation purposes) and one in the active vdev 1397 * configuration (if it's spared in). During this phase we open and 1398 * validate each vdev on the spare list. If the vdev also exists in the 1399 * active configuration, then we also mark this vdev as an active spare. 1400 */ 1401 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1402 KM_SLEEP); 1403 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1404 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1405 VDEV_ALLOC_SPARE) == 0); 1406 ASSERT(vd != NULL); 1407 1408 spa->spa_spares.sav_vdevs[i] = vd; 1409 1410 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1411 B_FALSE)) != NULL) { 1412 if (!tvd->vdev_isspare) 1413 spa_spare_add(tvd); 1414 1415 /* 1416 * We only mark the spare active if we were successfully 1417 * able to load the vdev. Otherwise, importing a pool 1418 * with a bad active spare would result in strange 1419 * behavior, because multiple pool would think the spare 1420 * is actively in use. 1421 * 1422 * There is a vulnerability here to an equally bizarre 1423 * circumstance, where a dead active spare is later 1424 * brought back to life (onlined or otherwise). Given 1425 * the rarity of this scenario, and the extra complexity 1426 * it adds, we ignore the possibility. 1427 */ 1428 if (!vdev_is_dead(tvd)) 1429 spa_spare_activate(tvd); 1430 } 1431 1432 vd->vdev_top = vd; 1433 vd->vdev_aux = &spa->spa_spares; 1434 1435 if (vdev_open(vd) != 0) 1436 continue; 1437 1438 if (vdev_validate_aux(vd) == 0) 1439 spa_spare_add(vd); 1440 } 1441 1442 /* 1443 * Recompute the stashed list of spares, with status information 1444 * this time. 1445 */ 1446 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1447 DATA_TYPE_NVLIST_ARRAY) == 0); 1448 1449 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1450 KM_SLEEP); 1451 for (i = 0; i < spa->spa_spares.sav_count; i++) 1452 spares[i] = vdev_config_generate(spa, 1453 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1454 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1455 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1456 for (i = 0; i < spa->spa_spares.sav_count; i++) 1457 nvlist_free(spares[i]); 1458 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1459} 1460 1461/* 1462 * Load (or re-load) the current list of vdevs describing the active l2cache for 1463 * this pool. When this is called, we have some form of basic information in 1464 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1465 * then re-generate a more complete list including status information. 1466 * Devices which are already active have their details maintained, and are 1467 * not re-opened. 1468 */ 1469static void 1470spa_load_l2cache(spa_t *spa) 1471{ 1472 nvlist_t **l2cache; 1473 uint_t nl2cache; 1474 int i, j, oldnvdevs; 1475 uint64_t guid; 1476 vdev_t *vd, **oldvdevs, **newvdevs; 1477 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1478 1479 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1480 1481 if (sav->sav_config != NULL) { 1482 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1483 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1484 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1485 } else { 1486 nl2cache = 0; 1487 newvdevs = NULL; 1488 } 1489 1490 oldvdevs = sav->sav_vdevs; 1491 oldnvdevs = sav->sav_count; 1492 sav->sav_vdevs = NULL; 1493 sav->sav_count = 0; 1494 1495 /* 1496 * Process new nvlist of vdevs. 1497 */ 1498 for (i = 0; i < nl2cache; i++) { 1499 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1500 &guid) == 0); 1501 1502 newvdevs[i] = NULL; 1503 for (j = 0; j < oldnvdevs; j++) { 1504 vd = oldvdevs[j]; 1505 if (vd != NULL && guid == vd->vdev_guid) { 1506 /* 1507 * Retain previous vdev for add/remove ops. 1508 */ 1509 newvdevs[i] = vd; 1510 oldvdevs[j] = NULL; 1511 break; 1512 } 1513 } 1514 1515 if (newvdevs[i] == NULL) { 1516 /* 1517 * Create new vdev 1518 */ 1519 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1520 VDEV_ALLOC_L2CACHE) == 0); 1521 ASSERT(vd != NULL); 1522 newvdevs[i] = vd; 1523 1524 /* 1525 * Commit this vdev as an l2cache device, 1526 * even if it fails to open. 1527 */ 1528 spa_l2cache_add(vd); 1529 1530 vd->vdev_top = vd; 1531 vd->vdev_aux = sav; 1532 1533 spa_l2cache_activate(vd); 1534 1535 if (vdev_open(vd) != 0) 1536 continue; 1537 1538 (void) vdev_validate_aux(vd); 1539 1540 if (!vdev_is_dead(vd)) 1541 l2arc_add_vdev(spa, vd); 1542 } 1543 } 1544 1545 /* 1546 * Purge vdevs that were dropped 1547 */ 1548 for (i = 0; i < oldnvdevs; i++) { 1549 uint64_t pool; 1550 1551 vd = oldvdevs[i]; 1552 if (vd != NULL) { 1553 ASSERT(vd->vdev_isl2cache); 1554 1555 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1556 pool != 0ULL && l2arc_vdev_present(vd)) 1557 l2arc_remove_vdev(vd); 1558 vdev_clear_stats(vd); 1559 vdev_free(vd); 1560 } 1561 } 1562 1563 if (oldvdevs) 1564 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1565 1566 if (sav->sav_config == NULL) 1567 goto out; 1568 1569 sav->sav_vdevs = newvdevs; 1570 sav->sav_count = (int)nl2cache; 1571 1572 /* 1573 * Recompute the stashed list of l2cache devices, with status 1574 * information this time. 1575 */ 1576 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1577 DATA_TYPE_NVLIST_ARRAY) == 0); 1578 1579 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1580 for (i = 0; i < sav->sav_count; i++) 1581 l2cache[i] = vdev_config_generate(spa, 1582 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1583 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1584 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1585out: 1586 for (i = 0; i < sav->sav_count; i++) 1587 nvlist_free(l2cache[i]); 1588 if (sav->sav_count) 1589 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1590} 1591 1592static int 1593load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1594{ 1595 dmu_buf_t *db; 1596 char *packed = NULL; 1597 size_t nvsize = 0; 1598 int error; 1599 *value = NULL; 1600 1601 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1602 if (error != 0) 1603 return (error); 1604 nvsize = *(uint64_t *)db->db_data; 1605 dmu_buf_rele(db, FTAG); 1606 1607 packed = kmem_alloc(nvsize, KM_SLEEP); 1608 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1609 DMU_READ_PREFETCH); 1610 if (error == 0) 1611 error = nvlist_unpack(packed, nvsize, value, 0); 1612 kmem_free(packed, nvsize); 1613 1614 return (error); 1615} 1616 1617/* 1618 * Checks to see if the given vdev could not be opened, in which case we post a 1619 * sysevent to notify the autoreplace code that the device has been removed. 1620 */ 1621static void 1622spa_check_removed(vdev_t *vd) 1623{ 1624 for (int c = 0; c < vd->vdev_children; c++) 1625 spa_check_removed(vd->vdev_child[c]); 1626 1627 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1628 !vd->vdev_ishole) { 1629 zfs_post_autoreplace(vd->vdev_spa, vd); 1630 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); 1631 } 1632} 1633 1634/* 1635 * Validate the current config against the MOS config 1636 */ 1637static boolean_t 1638spa_config_valid(spa_t *spa, nvlist_t *config) 1639{ 1640 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 1641 nvlist_t *nv; 1642 1643 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); 1644 1645 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1646 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 1647 1648 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); 1649 1650 /* 1651 * If we're doing a normal import, then build up any additional 1652 * diagnostic information about missing devices in this config. 1653 * We'll pass this up to the user for further processing. 1654 */ 1655 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1656 nvlist_t **child, *nv; 1657 uint64_t idx = 0; 1658 1659 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1660 KM_SLEEP); 1661 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1662 1663 for (int c = 0; c < rvd->vdev_children; c++) { 1664 vdev_t *tvd = rvd->vdev_child[c]; 1665 vdev_t *mtvd = mrvd->vdev_child[c]; 1666 1667 if (tvd->vdev_ops == &vdev_missing_ops && 1668 mtvd->vdev_ops != &vdev_missing_ops && 1669 mtvd->vdev_islog) 1670 child[idx++] = vdev_config_generate(spa, mtvd, 1671 B_FALSE, 0); 1672 } 1673 1674 if (idx) { 1675 VERIFY(nvlist_add_nvlist_array(nv, 1676 ZPOOL_CONFIG_CHILDREN, child, idx) == 0); 1677 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 1678 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); 1679 1680 for (int i = 0; i < idx; i++) 1681 nvlist_free(child[i]); 1682 } 1683 nvlist_free(nv); 1684 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1685 } 1686 1687 /* 1688 * Compare the root vdev tree with the information we have 1689 * from the MOS config (mrvd). Check each top-level vdev 1690 * with the corresponding MOS config top-level (mtvd). 1691 */ 1692 for (int c = 0; c < rvd->vdev_children; c++) { 1693 vdev_t *tvd = rvd->vdev_child[c]; 1694 vdev_t *mtvd = mrvd->vdev_child[c]; 1695 1696 /* 1697 * Resolve any "missing" vdevs in the current configuration. 1698 * If we find that the MOS config has more accurate information 1699 * about the top-level vdev then use that vdev instead. 1700 */ 1701 if (tvd->vdev_ops == &vdev_missing_ops && 1702 mtvd->vdev_ops != &vdev_missing_ops) { 1703 1704 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) 1705 continue; 1706 1707 /* 1708 * Device specific actions. 1709 */ 1710 if (mtvd->vdev_islog) { 1711 spa_set_log_state(spa, SPA_LOG_CLEAR); 1712 } else { 1713 /* 1714 * XXX - once we have 'readonly' pool 1715 * support we should be able to handle 1716 * missing data devices by transitioning 1717 * the pool to readonly. 1718 */ 1719 continue; 1720 } 1721 1722 /* 1723 * Swap the missing vdev with the data we were 1724 * able to obtain from the MOS config. 1725 */ 1726 vdev_remove_child(rvd, tvd); 1727 vdev_remove_child(mrvd, mtvd); 1728 1729 vdev_add_child(rvd, mtvd); 1730 vdev_add_child(mrvd, tvd); 1731 1732 spa_config_exit(spa, SCL_ALL, FTAG); 1733 vdev_load(mtvd); 1734 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1735 1736 vdev_reopen(rvd); 1737 } else if (mtvd->vdev_islog) { 1738 /* 1739 * Load the slog device's state from the MOS config 1740 * since it's possible that the label does not 1741 * contain the most up-to-date information. 1742 */ 1743 vdev_load_log_state(tvd, mtvd); 1744 vdev_reopen(tvd); 1745 } 1746 } 1747 vdev_free(mrvd); 1748 spa_config_exit(spa, SCL_ALL, FTAG); 1749 1750 /* 1751 * Ensure we were able to validate the config. 1752 */ 1753 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); 1754} 1755 1756/* 1757 * Check for missing log devices 1758 */ 1759static boolean_t 1760spa_check_logs(spa_t *spa) 1761{ 1762 boolean_t rv = B_FALSE; 1763 1764 switch (spa->spa_log_state) { 1765 case SPA_LOG_MISSING: 1766 /* need to recheck in case slog has been restored */ 1767 case SPA_LOG_UNKNOWN: 1768 rv = (dmu_objset_find(spa->spa_name, zil_check_log_chain, 1769 NULL, DS_FIND_CHILDREN) != 0); 1770 if (rv) 1771 spa_set_log_state(spa, SPA_LOG_MISSING); 1772 break; 1773 } 1774 return (rv); 1775} 1776 1777static boolean_t 1778spa_passivate_log(spa_t *spa) 1779{ 1780 vdev_t *rvd = spa->spa_root_vdev; 1781 boolean_t slog_found = B_FALSE; 1782 1783 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1784 1785 if (!spa_has_slogs(spa)) 1786 return (B_FALSE); 1787 1788 for (int c = 0; c < rvd->vdev_children; c++) { 1789 vdev_t *tvd = rvd->vdev_child[c]; 1790 metaslab_group_t *mg = tvd->vdev_mg; 1791 1792 if (tvd->vdev_islog) { 1793 metaslab_group_passivate(mg); 1794 slog_found = B_TRUE; 1795 } 1796 } 1797 1798 return (slog_found); 1799} 1800 1801static void 1802spa_activate_log(spa_t *spa) 1803{ 1804 vdev_t *rvd = spa->spa_root_vdev; 1805 1806 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1807 1808 for (int c = 0; c < rvd->vdev_children; c++) { 1809 vdev_t *tvd = rvd->vdev_child[c]; 1810 metaslab_group_t *mg = tvd->vdev_mg; 1811 1812 if (tvd->vdev_islog) 1813 metaslab_group_activate(mg); 1814 } 1815} 1816 1817int 1818spa_offline_log(spa_t *spa) 1819{ 1820 int error; 1821 1822 error = dmu_objset_find(spa_name(spa), zil_vdev_offline, 1823 NULL, DS_FIND_CHILDREN); 1824 if (error == 0) { 1825 /* 1826 * We successfully offlined the log device, sync out the 1827 * current txg so that the "stubby" block can be removed 1828 * by zil_sync(). 1829 */ 1830 txg_wait_synced(spa->spa_dsl_pool, 0); 1831 } 1832 return (error); 1833} 1834 1835static void 1836spa_aux_check_removed(spa_aux_vdev_t *sav) 1837{ 1838 int i; 1839 1840 for (i = 0; i < sav->sav_count; i++) 1841 spa_check_removed(sav->sav_vdevs[i]); 1842} 1843 1844void 1845spa_claim_notify(zio_t *zio) 1846{ 1847 spa_t *spa = zio->io_spa; 1848 1849 if (zio->io_error) 1850 return; 1851 1852 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1853 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1854 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1855 mutex_exit(&spa->spa_props_lock); 1856} 1857 1858typedef struct spa_load_error { 1859 uint64_t sle_meta_count; 1860 uint64_t sle_data_count; 1861} spa_load_error_t; 1862 1863static void 1864spa_load_verify_done(zio_t *zio) 1865{ 1866 blkptr_t *bp = zio->io_bp; 1867 spa_load_error_t *sle = zio->io_private; 1868 dmu_object_type_t type = BP_GET_TYPE(bp); 1869 int error = zio->io_error; 1870 1871 if (error) { 1872 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 1873 type != DMU_OT_INTENT_LOG) 1874 atomic_add_64(&sle->sle_meta_count, 1); 1875 else 1876 atomic_add_64(&sle->sle_data_count, 1); 1877 } 1878 zio_data_buf_free(zio->io_data, zio->io_size); 1879} 1880 1881/*ARGSUSED*/ 1882static int 1883spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1884 const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg) 1885{ 1886 if (!BP_IS_HOLE(bp)) { 1887 zio_t *rio = arg; 1888 size_t size = BP_GET_PSIZE(bp); 1889 void *data = zio_data_buf_alloc(size); 1890 1891 zio_nowait(zio_read(rio, spa, bp, data, size, 1892 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 1893 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 1894 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 1895 } 1896 return (0); 1897} 1898 1899static int 1900spa_load_verify(spa_t *spa) 1901{ 1902 zio_t *rio; 1903 spa_load_error_t sle = { 0 }; 1904 zpool_rewind_policy_t policy; 1905 boolean_t verify_ok = B_FALSE; 1906 int error; 1907 1908 zpool_get_rewind_policy(spa->spa_config, &policy); 1909 1910 if (policy.zrp_request & ZPOOL_NEVER_REWIND) 1911 return (0); 1912 1913 rio = zio_root(spa, NULL, &sle, 1914 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1915 1916 error = traverse_pool(spa, spa->spa_verify_min_txg, 1917 TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio); 1918 1919 (void) zio_wait(rio); 1920 1921 spa->spa_load_meta_errors = sle.sle_meta_count; 1922 spa->spa_load_data_errors = sle.sle_data_count; 1923 1924 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && 1925 sle.sle_data_count <= policy.zrp_maxdata) { 1926 int64_t loss = 0; 1927 1928 verify_ok = B_TRUE; 1929 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 1930 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 1931 1932 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 1933 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1934 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 1935 VERIFY(nvlist_add_int64(spa->spa_load_info, 1936 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 1937 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1938 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 1939 } else { 1940 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 1941 } 1942 1943 if (error) { 1944 if (error != ENXIO && error != EIO) 1945 error = SET_ERROR(EIO); 1946 return (error); 1947 } 1948 1949 return (verify_ok ? 0 : EIO); 1950} 1951 1952/* 1953 * Find a value in the pool props object. 1954 */ 1955static void 1956spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 1957{ 1958 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 1959 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 1960} 1961 1962/* 1963 * Find a value in the pool directory object. 1964 */ 1965static int 1966spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) 1967{ 1968 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 1969 name, sizeof (uint64_t), 1, val)); 1970} 1971 1972static int 1973spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 1974{ 1975 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 1976 return (err); 1977} 1978 1979/* 1980 * Fix up config after a partly-completed split. This is done with the 1981 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 1982 * pool have that entry in their config, but only the splitting one contains 1983 * a list of all the guids of the vdevs that are being split off. 1984 * 1985 * This function determines what to do with that list: either rejoin 1986 * all the disks to the pool, or complete the splitting process. To attempt 1987 * the rejoin, each disk that is offlined is marked online again, and 1988 * we do a reopen() call. If the vdev label for every disk that was 1989 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 1990 * then we call vdev_split() on each disk, and complete the split. 1991 * 1992 * Otherwise we leave the config alone, with all the vdevs in place in 1993 * the original pool. 1994 */ 1995static void 1996spa_try_repair(spa_t *spa, nvlist_t *config) 1997{ 1998 uint_t extracted; 1999 uint64_t *glist; 2000 uint_t i, gcount; 2001 nvlist_t *nvl; 2002 vdev_t **vd; 2003 boolean_t attempt_reopen; 2004 2005 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2006 return; 2007 2008 /* check that the config is complete */ 2009 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2010 &glist, &gcount) != 0) 2011 return; 2012 2013 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2014 2015 /* attempt to online all the vdevs & validate */ 2016 attempt_reopen = B_TRUE; 2017 for (i = 0; i < gcount; i++) { 2018 if (glist[i] == 0) /* vdev is hole */ 2019 continue; 2020 2021 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2022 if (vd[i] == NULL) { 2023 /* 2024 * Don't bother attempting to reopen the disks; 2025 * just do the split. 2026 */ 2027 attempt_reopen = B_FALSE; 2028 } else { 2029 /* attempt to re-online it */ 2030 vd[i]->vdev_offline = B_FALSE; 2031 } 2032 } 2033 2034 if (attempt_reopen) { 2035 vdev_reopen(spa->spa_root_vdev); 2036 2037 /* check each device to see what state it's in */ 2038 for (extracted = 0, i = 0; i < gcount; i++) { 2039 if (vd[i] != NULL && 2040 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2041 break; 2042 ++extracted; 2043 } 2044 } 2045 2046 /* 2047 * If every disk has been moved to the new pool, or if we never 2048 * even attempted to look at them, then we split them off for 2049 * good. 2050 */ 2051 if (!attempt_reopen || gcount == extracted) { 2052 for (i = 0; i < gcount; i++) 2053 if (vd[i] != NULL) 2054 vdev_split(vd[i]); 2055 vdev_reopen(spa->spa_root_vdev); 2056 } 2057 2058 kmem_free(vd, gcount * sizeof (vdev_t *)); 2059} 2060 2061static int 2062spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, 2063 boolean_t mosconfig) 2064{ 2065 nvlist_t *config = spa->spa_config; 2066 char *ereport = FM_EREPORT_ZFS_POOL; 2067 char *comment; 2068 int error; 2069 uint64_t pool_guid; 2070 nvlist_t *nvl; 2071 2072 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) 2073 return (SET_ERROR(EINVAL)); 2074 2075 ASSERT(spa->spa_comment == NULL); 2076 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2077 spa->spa_comment = spa_strdup(comment); 2078 2079 /* 2080 * Versioning wasn't explicitly added to the label until later, so if 2081 * it's not present treat it as the initial version. 2082 */ 2083 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2084 &spa->spa_ubsync.ub_version) != 0) 2085 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2086 2087 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2088 &spa->spa_config_txg); 2089 2090 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && 2091 spa_guid_exists(pool_guid, 0)) { 2092 error = SET_ERROR(EEXIST); 2093 } else { 2094 spa->spa_config_guid = pool_guid; 2095 2096 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, 2097 &nvl) == 0) { 2098 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, 2099 KM_SLEEP) == 0); 2100 } 2101 2102 nvlist_free(spa->spa_load_info); 2103 spa->spa_load_info = fnvlist_alloc(); 2104 2105 gethrestime(&spa->spa_loaded_ts); 2106 error = spa_load_impl(spa, pool_guid, config, state, type, 2107 mosconfig, &ereport); 2108 } 2109 2110 spa->spa_minref = refcount_count(&spa->spa_refcount); 2111 if (error) { 2112 if (error != EEXIST) { 2113 spa->spa_loaded_ts.tv_sec = 0; 2114 spa->spa_loaded_ts.tv_nsec = 0; 2115 } 2116 if (error != EBADF) { 2117 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); 2118 } 2119 } 2120 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2121 spa->spa_ena = 0; 2122 2123 return (error); 2124} 2125 2126/* 2127 * Load an existing storage pool, using the pool's builtin spa_config as a 2128 * source of configuration information. 2129 */ 2130static int 2131spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, 2132 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 2133 char **ereport) 2134{ 2135 int error = 0; 2136 nvlist_t *nvroot = NULL; 2137 nvlist_t *label; 2138 vdev_t *rvd; 2139 uberblock_t *ub = &spa->spa_uberblock; 2140 uint64_t children, config_cache_txg = spa->spa_config_txg; 2141 int orig_mode = spa->spa_mode; 2142 int parse; 2143 uint64_t obj; 2144 boolean_t missing_feat_write = B_FALSE; 2145 2146 /* 2147 * If this is an untrusted config, access the pool in read-only mode. 2148 * This prevents things like resilvering recently removed devices. 2149 */ 2150 if (!mosconfig) 2151 spa->spa_mode = FREAD; 2152 2153 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2154 2155 spa->spa_load_state = state; 2156 2157 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) 2158 return (SET_ERROR(EINVAL)); 2159 2160 parse = (type == SPA_IMPORT_EXISTING ? 2161 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2162 2163 /* 2164 * Create "The Godfather" zio to hold all async IOs 2165 */ 2166 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 2167 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 2168 2169 /* 2170 * Parse the configuration into a vdev tree. We explicitly set the 2171 * value that will be returned by spa_version() since parsing the 2172 * configuration requires knowing the version number. 2173 */ 2174 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2175 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); 2176 spa_config_exit(spa, SCL_ALL, FTAG); 2177 2178 if (error != 0) 2179 return (error); 2180 2181 ASSERT(spa->spa_root_vdev == rvd); 2182 2183 if (type != SPA_IMPORT_ASSEMBLE) { 2184 ASSERT(spa_guid(spa) == pool_guid); 2185 } 2186 2187 /* 2188 * Try to open all vdevs, loading each label in the process. 2189 */ 2190 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2191 error = vdev_open(rvd); 2192 spa_config_exit(spa, SCL_ALL, FTAG); 2193 if (error != 0) 2194 return (error); 2195 2196 /* 2197 * We need to validate the vdev labels against the configuration that 2198 * we have in hand, which is dependent on the setting of mosconfig. If 2199 * mosconfig is true then we're validating the vdev labels based on 2200 * that config. Otherwise, we're validating against the cached config 2201 * (zpool.cache) that was read when we loaded the zfs module, and then 2202 * later we will recursively call spa_load() and validate against 2203 * the vdev config. 2204 * 2205 * If we're assembling a new pool that's been split off from an 2206 * existing pool, the labels haven't yet been updated so we skip 2207 * validation for now. 2208 */ 2209 if (type != SPA_IMPORT_ASSEMBLE) { 2210 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2211 error = vdev_validate(rvd, mosconfig); 2212 spa_config_exit(spa, SCL_ALL, FTAG); 2213 2214 if (error != 0) 2215 return (error); 2216 2217 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2218 return (SET_ERROR(ENXIO)); 2219 } 2220 2221 /* 2222 * Find the best uberblock. 2223 */ 2224 vdev_uberblock_load(rvd, ub, &label); 2225 2226 /* 2227 * If we weren't able to find a single valid uberblock, return failure. 2228 */ 2229 if (ub->ub_txg == 0) { 2230 nvlist_free(label); 2231 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2232 } 2233 2234 /* 2235 * If the pool has an unsupported version we can't open it. 2236 */ 2237 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2238 nvlist_free(label); 2239 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2240 } 2241 2242 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2243 nvlist_t *features; 2244 2245 /* 2246 * If we weren't able to find what's necessary for reading the 2247 * MOS in the label, return failure. 2248 */ 2249 if (label == NULL || nvlist_lookup_nvlist(label, 2250 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { 2251 nvlist_free(label); 2252 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2253 ENXIO)); 2254 } 2255 2256 /* 2257 * Update our in-core representation with the definitive values 2258 * from the label. 2259 */ 2260 nvlist_free(spa->spa_label_features); 2261 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2262 } 2263 2264 nvlist_free(label); 2265 2266 /* 2267 * Look through entries in the label nvlist's features_for_read. If 2268 * there is a feature listed there which we don't understand then we 2269 * cannot open a pool. 2270 */ 2271 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2272 nvlist_t *unsup_feat; 2273 2274 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2275 0); 2276 2277 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2278 NULL); nvp != NULL; 2279 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2280 if (!zfeature_is_supported(nvpair_name(nvp))) { 2281 VERIFY(nvlist_add_string(unsup_feat, 2282 nvpair_name(nvp), "") == 0); 2283 } 2284 } 2285 2286 if (!nvlist_empty(unsup_feat)) { 2287 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2288 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2289 nvlist_free(unsup_feat); 2290 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2291 ENOTSUP)); 2292 } 2293 2294 nvlist_free(unsup_feat); 2295 } 2296 2297 /* 2298 * If the vdev guid sum doesn't match the uberblock, we have an 2299 * incomplete configuration. We first check to see if the pool 2300 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). 2301 * If it is, defer the vdev_guid_sum check till later so we 2302 * can handle missing vdevs. 2303 */ 2304 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, 2305 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && 2306 rvd->vdev_guid_sum != ub->ub_guid_sum) 2307 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 2308 2309 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2310 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2311 spa_try_repair(spa, config); 2312 spa_config_exit(spa, SCL_ALL, FTAG); 2313 nvlist_free(spa->spa_config_splitting); 2314 spa->spa_config_splitting = NULL; 2315 } 2316 2317 /* 2318 * Initialize internal SPA structures. 2319 */ 2320 spa->spa_state = POOL_STATE_ACTIVE; 2321 spa->spa_ubsync = spa->spa_uberblock; 2322 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2323 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2324 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2325 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2326 spa->spa_claim_max_txg = spa->spa_first_txg; 2327 spa->spa_prev_software_version = ub->ub_software_version; 2328 2329 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2330 if (error) 2331 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2332 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2333 2334 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) 2335 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2336 2337 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 2338 boolean_t missing_feat_read = B_FALSE; 2339 nvlist_t *unsup_feat, *enabled_feat; 2340 2341 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 2342 &spa->spa_feat_for_read_obj) != 0) { 2343 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2344 } 2345 2346 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 2347 &spa->spa_feat_for_write_obj) != 0) { 2348 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2349 } 2350 2351 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 2352 &spa->spa_feat_desc_obj) != 0) { 2353 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2354 } 2355 2356 enabled_feat = fnvlist_alloc(); 2357 unsup_feat = fnvlist_alloc(); 2358 2359 if (!spa_features_check(spa, B_FALSE, 2360 unsup_feat, enabled_feat)) 2361 missing_feat_read = B_TRUE; 2362 2363 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { 2364 if (!spa_features_check(spa, B_TRUE, 2365 unsup_feat, enabled_feat)) { 2366 missing_feat_write = B_TRUE; 2367 } 2368 } 2369 2370 fnvlist_add_nvlist(spa->spa_load_info, 2371 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 2372 2373 if (!nvlist_empty(unsup_feat)) { 2374 fnvlist_add_nvlist(spa->spa_load_info, 2375 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 2376 } 2377 2378 fnvlist_free(enabled_feat); 2379 fnvlist_free(unsup_feat); 2380 2381 if (!missing_feat_read) { 2382 fnvlist_add_boolean(spa->spa_load_info, 2383 ZPOOL_CONFIG_CAN_RDONLY); 2384 } 2385 2386 /* 2387 * If the state is SPA_LOAD_TRYIMPORT, our objective is 2388 * twofold: to determine whether the pool is available for 2389 * import in read-write mode and (if it is not) whether the 2390 * pool is available for import in read-only mode. If the pool 2391 * is available for import in read-write mode, it is displayed 2392 * as available in userland; if it is not available for import 2393 * in read-only mode, it is displayed as unavailable in 2394 * userland. If the pool is available for import in read-only 2395 * mode but not read-write mode, it is displayed as unavailable 2396 * in userland with a special note that the pool is actually 2397 * available for open in read-only mode. 2398 * 2399 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 2400 * missing a feature for write, we must first determine whether 2401 * the pool can be opened read-only before returning to 2402 * userland in order to know whether to display the 2403 * abovementioned note. 2404 */ 2405 if (missing_feat_read || (missing_feat_write && 2406 spa_writeable(spa))) { 2407 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2408 ENOTSUP)); 2409 } 2410 2411 /* 2412 * Load refcounts for ZFS features from disk into an in-memory 2413 * cache during SPA initialization. 2414 */ 2415 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 2416 uint64_t refcount; 2417 2418 error = feature_get_refcount_from_disk(spa, 2419 &spa_feature_table[i], &refcount); 2420 if (error == 0) { 2421 spa->spa_feat_refcount_cache[i] = refcount; 2422 } else if (error == ENOTSUP) { 2423 spa->spa_feat_refcount_cache[i] = 2424 SPA_FEATURE_DISABLED; 2425 } else { 2426 return (spa_vdev_err(rvd, 2427 VDEV_AUX_CORRUPT_DATA, EIO)); 2428 } 2429 } 2430 } 2431 2432 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { 2433 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, 2434 &spa->spa_feat_enabled_txg_obj) != 0) { 2435 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2436 } 2437 } 2438 2439 spa->spa_is_initializing = B_TRUE; 2440 error = dsl_pool_open(spa->spa_dsl_pool); 2441 spa->spa_is_initializing = B_FALSE; 2442 if (error != 0) 2443 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2444 2445 if (!mosconfig) { 2446 uint64_t hostid; 2447 nvlist_t *policy = NULL, *nvconfig; 2448 2449 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2450 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2451 2452 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, 2453 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2454 char *hostname; 2455 unsigned long myhostid = 0; 2456 2457 VERIFY(nvlist_lookup_string(nvconfig, 2458 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); 2459 2460#ifdef _KERNEL 2461 myhostid = zone_get_hostid(NULL); 2462#else /* _KERNEL */ 2463 /* 2464 * We're emulating the system's hostid in userland, so 2465 * we can't use zone_get_hostid(). 2466 */ 2467 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); 2468#endif /* _KERNEL */ 2469 if (check_hostid && hostid != 0 && myhostid != 0 && 2470 hostid != myhostid) { 2471 nvlist_free(nvconfig); 2472 cmn_err(CE_WARN, "pool '%s' could not be " 2473 "loaded as it was last accessed by " 2474 "another system (host: %s hostid: 0x%lx). " 2475 "See: http://illumos.org/msg/ZFS-8000-EY", 2476 spa_name(spa), hostname, 2477 (unsigned long)hostid); 2478 return (SET_ERROR(EBADF)); 2479 } 2480 } 2481 if (nvlist_lookup_nvlist(spa->spa_config, 2482 ZPOOL_REWIND_POLICY, &policy) == 0) 2483 VERIFY(nvlist_add_nvlist(nvconfig, 2484 ZPOOL_REWIND_POLICY, policy) == 0); 2485 2486 spa_config_set(spa, nvconfig); 2487 spa_unload(spa); 2488 spa_deactivate(spa); 2489 spa_activate(spa, orig_mode); 2490 2491 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); 2492 } 2493 2494 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) 2495 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2496 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 2497 if (error != 0) 2498 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2499 2500 /* 2501 * Load the bit that tells us to use the new accounting function 2502 * (raid-z deflation). If we have an older pool, this will not 2503 * be present. 2504 */ 2505 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); 2506 if (error != 0 && error != ENOENT) 2507 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2508 2509 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 2510 &spa->spa_creation_version); 2511 if (error != 0 && error != ENOENT) 2512 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2513 2514 /* 2515 * Load the persistent error log. If we have an older pool, this will 2516 * not be present. 2517 */ 2518 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); 2519 if (error != 0 && error != ENOENT) 2520 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2521 2522 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 2523 &spa->spa_errlog_scrub); 2524 if (error != 0 && error != ENOENT) 2525 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2526 2527 /* 2528 * Load the history object. If we have an older pool, this 2529 * will not be present. 2530 */ 2531 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); 2532 if (error != 0 && error != ENOENT) 2533 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2534 2535 /* 2536 * If we're assembling the pool from the split-off vdevs of 2537 * an existing pool, we don't want to attach the spares & cache 2538 * devices. 2539 */ 2540 2541 /* 2542 * Load any hot spares for this pool. 2543 */ 2544 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); 2545 if (error != 0 && error != ENOENT) 2546 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2547 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2548 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 2549 if (load_nvlist(spa, spa->spa_spares.sav_object, 2550 &spa->spa_spares.sav_config) != 0) 2551 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2552 2553 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2554 spa_load_spares(spa); 2555 spa_config_exit(spa, SCL_ALL, FTAG); 2556 } else if (error == 0) { 2557 spa->spa_spares.sav_sync = B_TRUE; 2558 } 2559 2560 /* 2561 * Load any level 2 ARC devices for this pool. 2562 */ 2563 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 2564 &spa->spa_l2cache.sav_object); 2565 if (error != 0 && error != ENOENT) 2566 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2567 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2568 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 2569 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 2570 &spa->spa_l2cache.sav_config) != 0) 2571 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2572 2573 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2574 spa_load_l2cache(spa); 2575 spa_config_exit(spa, SCL_ALL, FTAG); 2576 } else if (error == 0) { 2577 spa->spa_l2cache.sav_sync = B_TRUE; 2578 } 2579 2580 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 2581 2582 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); 2583 if (error && error != ENOENT) 2584 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2585 2586 if (error == 0) { 2587 uint64_t autoreplace; 2588 2589 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 2590 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 2591 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 2592 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 2593 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 2594 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 2595 &spa->spa_dedup_ditto); 2596 2597 spa->spa_autoreplace = (autoreplace != 0); 2598 } 2599 2600 /* 2601 * If the 'autoreplace' property is set, then post a resource notifying 2602 * the ZFS DE that it should not issue any faults for unopenable 2603 * devices. We also iterate over the vdevs, and post a sysevent for any 2604 * unopenable vdevs so that the normal autoreplace handler can take 2605 * over. 2606 */ 2607 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { 2608 spa_check_removed(spa->spa_root_vdev); 2609 /* 2610 * For the import case, this is done in spa_import(), because 2611 * at this point we're using the spare definitions from 2612 * the MOS config, not necessarily from the userland config. 2613 */ 2614 if (state != SPA_LOAD_IMPORT) { 2615 spa_aux_check_removed(&spa->spa_spares); 2616 spa_aux_check_removed(&spa->spa_l2cache); 2617 } 2618 } 2619 2620 /* 2621 * Load the vdev state for all toplevel vdevs. 2622 */ 2623 vdev_load(rvd); 2624 2625 /* 2626 * Propagate the leaf DTLs we just loaded all the way up the tree. 2627 */ 2628 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2629 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 2630 spa_config_exit(spa, SCL_ALL, FTAG); 2631 2632 /* 2633 * Load the DDTs (dedup tables). 2634 */ 2635 error = ddt_load(spa); 2636 if (error != 0) 2637 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2638 2639 spa_update_dspace(spa); 2640 2641 /* 2642 * Validate the config, using the MOS config to fill in any 2643 * information which might be missing. If we fail to validate 2644 * the config then declare the pool unfit for use. If we're 2645 * assembling a pool from a split, the log is not transferred 2646 * over. 2647 */ 2648 if (type != SPA_IMPORT_ASSEMBLE) { 2649 nvlist_t *nvconfig; 2650 2651 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2652 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2653 2654 if (!spa_config_valid(spa, nvconfig)) { 2655 nvlist_free(nvconfig); 2656 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 2657 ENXIO)); 2658 } 2659 nvlist_free(nvconfig); 2660 2661 /* 2662 * Now that we've validated the config, check the state of the 2663 * root vdev. If it can't be opened, it indicates one or 2664 * more toplevel vdevs are faulted. 2665 */ 2666 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2667 return (SET_ERROR(ENXIO)); 2668 2669 if (spa_check_logs(spa)) { 2670 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 2671 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); 2672 } 2673 } 2674 2675 if (missing_feat_write) { 2676 ASSERT(state == SPA_LOAD_TRYIMPORT); 2677 2678 /* 2679 * At this point, we know that we can open the pool in 2680 * read-only mode but not read-write mode. We now have enough 2681 * information and can return to userland. 2682 */ 2683 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); 2684 } 2685 2686 /* 2687 * We've successfully opened the pool, verify that we're ready 2688 * to start pushing transactions. 2689 */ 2690 if (state != SPA_LOAD_TRYIMPORT) { 2691 if (error = spa_load_verify(spa)) 2692 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2693 error)); 2694 } 2695 2696 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || 2697 spa->spa_load_max_txg == UINT64_MAX)) { 2698 dmu_tx_t *tx; 2699 int need_update = B_FALSE; 2700 2701 ASSERT(state != SPA_LOAD_TRYIMPORT); 2702 2703 /* 2704 * Claim log blocks that haven't been committed yet. 2705 * This must all happen in a single txg. 2706 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 2707 * invoked from zil_claim_log_block()'s i/o done callback. 2708 * Price of rollback is that we abandon the log. 2709 */ 2710 spa->spa_claiming = B_TRUE; 2711 2712 tx = dmu_tx_create_assigned(spa_get_dsl(spa), 2713 spa_first_txg(spa)); 2714 (void) dmu_objset_find(spa_name(spa), 2715 zil_claim, tx, DS_FIND_CHILDREN); 2716 dmu_tx_commit(tx); 2717 2718 spa->spa_claiming = B_FALSE; 2719 2720 spa_set_log_state(spa, SPA_LOG_GOOD); 2721 spa->spa_sync_on = B_TRUE; 2722 txg_sync_start(spa->spa_dsl_pool); 2723 2724 /* 2725 * Wait for all claims to sync. We sync up to the highest 2726 * claimed log block birth time so that claimed log blocks 2727 * don't appear to be from the future. spa_claim_max_txg 2728 * will have been set for us by either zil_check_log_chain() 2729 * (invoked from spa_check_logs()) or zil_claim() above. 2730 */ 2731 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 2732 2733 /* 2734 * If the config cache is stale, or we have uninitialized 2735 * metaslabs (see spa_vdev_add()), then update the config. 2736 * 2737 * If this is a verbatim import, trust the current 2738 * in-core spa_config and update the disk labels. 2739 */ 2740 if (config_cache_txg != spa->spa_config_txg || 2741 state == SPA_LOAD_IMPORT || 2742 state == SPA_LOAD_RECOVER || 2743 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 2744 need_update = B_TRUE; 2745 2746 for (int c = 0; c < rvd->vdev_children; c++) 2747 if (rvd->vdev_child[c]->vdev_ms_array == 0) 2748 need_update = B_TRUE; 2749 2750 /* 2751 * Update the config cache asychronously in case we're the 2752 * root pool, in which case the config cache isn't writable yet. 2753 */ 2754 if (need_update) 2755 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2756 2757 /* 2758 * Check all DTLs to see if anything needs resilvering. 2759 */ 2760 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 2761 vdev_resilver_needed(rvd, NULL, NULL)) 2762 spa_async_request(spa, SPA_ASYNC_RESILVER); 2763 2764 /* 2765 * Log the fact that we booted up (so that we can detect if 2766 * we rebooted in the middle of an operation). 2767 */ 2768 spa_history_log_version(spa, "open"); 2769 2770 /* 2771 * Delete any inconsistent datasets. 2772 */ 2773 (void) dmu_objset_find(spa_name(spa), 2774 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 2775 2776 /* 2777 * Clean up any stale temporary dataset userrefs. 2778 */ 2779 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 2780 } 2781 2782 return (0); 2783} 2784 2785static int 2786spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) 2787{ 2788 int mode = spa->spa_mode; 2789 2790 spa_unload(spa); 2791 spa_deactivate(spa); 2792 2793 spa->spa_load_max_txg--; 2794 2795 spa_activate(spa, mode); 2796 spa_async_suspend(spa); 2797 2798 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); 2799} 2800 2801/* 2802 * If spa_load() fails this function will try loading prior txg's. If 2803 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 2804 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 2805 * function will not rewind the pool and will return the same error as 2806 * spa_load(). 2807 */ 2808static int 2809spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, 2810 uint64_t max_request, int rewind_flags) 2811{ 2812 nvlist_t *loadinfo = NULL; 2813 nvlist_t *config = NULL; 2814 int load_error, rewind_error; 2815 uint64_t safe_rewind_txg; 2816 uint64_t min_txg; 2817 2818 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 2819 spa->spa_load_max_txg = spa->spa_load_txg; 2820 spa_set_log_state(spa, SPA_LOG_CLEAR); 2821 } else { 2822 spa->spa_load_max_txg = max_request; 2823 } 2824 2825 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, 2826 mosconfig); 2827 if (load_error == 0) 2828 return (0); 2829 2830 if (spa->spa_root_vdev != NULL) 2831 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2832 2833 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 2834 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 2835 2836 if (rewind_flags & ZPOOL_NEVER_REWIND) { 2837 nvlist_free(config); 2838 return (load_error); 2839 } 2840 2841 if (state == SPA_LOAD_RECOVER) { 2842 /* Price of rolling back is discarding txgs, including log */ 2843 spa_set_log_state(spa, SPA_LOG_CLEAR); 2844 } else { 2845 /* 2846 * If we aren't rolling back save the load info from our first 2847 * import attempt so that we can restore it after attempting 2848 * to rewind. 2849 */ 2850 loadinfo = spa->spa_load_info; 2851 spa->spa_load_info = fnvlist_alloc(); 2852 } 2853 2854 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 2855 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 2856 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 2857 TXG_INITIAL : safe_rewind_txg; 2858 2859 /* 2860 * Continue as long as we're finding errors, we're still within 2861 * the acceptable rewind range, and we're still finding uberblocks 2862 */ 2863 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 2864 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 2865 if (spa->spa_load_max_txg < safe_rewind_txg) 2866 spa->spa_extreme_rewind = B_TRUE; 2867 rewind_error = spa_load_retry(spa, state, mosconfig); 2868 } 2869 2870 spa->spa_extreme_rewind = B_FALSE; 2871 spa->spa_load_max_txg = UINT64_MAX; 2872 2873 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 2874 spa_config_set(spa, config); 2875 2876 if (state == SPA_LOAD_RECOVER) { 2877 ASSERT3P(loadinfo, ==, NULL); 2878 return (rewind_error); 2879 } else { 2880 /* Store the rewind info as part of the initial load info */ 2881 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 2882 spa->spa_load_info); 2883 2884 /* Restore the initial load info */ 2885 fnvlist_free(spa->spa_load_info); 2886 spa->spa_load_info = loadinfo; 2887 2888 return (load_error); 2889 } 2890} 2891 2892/* 2893 * Pool Open/Import 2894 * 2895 * The import case is identical to an open except that the configuration is sent 2896 * down from userland, instead of grabbed from the configuration cache. For the 2897 * case of an open, the pool configuration will exist in the 2898 * POOL_STATE_UNINITIALIZED state. 2899 * 2900 * The stats information (gen/count/ustats) is used to gather vdev statistics at 2901 * the same time open the pool, without having to keep around the spa_t in some 2902 * ambiguous state. 2903 */ 2904static int 2905spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 2906 nvlist_t **config) 2907{ 2908 spa_t *spa; 2909 spa_load_state_t state = SPA_LOAD_OPEN; 2910 int error; 2911 int locked = B_FALSE; 2912 int firstopen = B_FALSE; 2913 2914 *spapp = NULL; 2915 2916 /* 2917 * As disgusting as this is, we need to support recursive calls to this 2918 * function because dsl_dir_open() is called during spa_load(), and ends 2919 * up calling spa_open() again. The real fix is to figure out how to 2920 * avoid dsl_dir_open() calling this in the first place. 2921 */ 2922 if (mutex_owner(&spa_namespace_lock) != curthread) { 2923 mutex_enter(&spa_namespace_lock); 2924 locked = B_TRUE; 2925 } 2926 2927 if ((spa = spa_lookup(pool)) == NULL) { 2928 if (locked) 2929 mutex_exit(&spa_namespace_lock); 2930 return (SET_ERROR(ENOENT)); 2931 } 2932 2933 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 2934 zpool_rewind_policy_t policy; 2935 2936 firstopen = B_TRUE; 2937 2938 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, 2939 &policy); 2940 if (policy.zrp_request & ZPOOL_DO_REWIND) 2941 state = SPA_LOAD_RECOVER; 2942 2943 spa_activate(spa, spa_mode_global); 2944 2945 if (state != SPA_LOAD_RECOVER) 2946 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 2947 2948 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, 2949 policy.zrp_request); 2950 2951 if (error == EBADF) { 2952 /* 2953 * If vdev_validate() returns failure (indicated by 2954 * EBADF), it indicates that one of the vdevs indicates 2955 * that the pool has been exported or destroyed. If 2956 * this is the case, the config cache is out of sync and 2957 * we should remove the pool from the namespace. 2958 */ 2959 spa_unload(spa); 2960 spa_deactivate(spa); 2961 spa_config_sync(spa, B_TRUE, B_TRUE); 2962 spa_remove(spa); 2963 if (locked) 2964 mutex_exit(&spa_namespace_lock); 2965 return (SET_ERROR(ENOENT)); 2966 } 2967 2968 if (error) { 2969 /* 2970 * We can't open the pool, but we still have useful 2971 * information: the state of each vdev after the 2972 * attempted vdev_open(). Return this to the user. 2973 */ 2974 if (config != NULL && spa->spa_config) { 2975 VERIFY(nvlist_dup(spa->spa_config, config, 2976 KM_SLEEP) == 0); 2977 VERIFY(nvlist_add_nvlist(*config, 2978 ZPOOL_CONFIG_LOAD_INFO, 2979 spa->spa_load_info) == 0); 2980 } 2981 spa_unload(spa); 2982 spa_deactivate(spa); 2983 spa->spa_last_open_failed = error; 2984 if (locked) 2985 mutex_exit(&spa_namespace_lock); 2986 *spapp = NULL; 2987 return (error); 2988 } 2989 } 2990 2991 spa_open_ref(spa, tag); 2992 2993 if (config != NULL) 2994 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2995 2996 /* 2997 * If we've recovered the pool, pass back any information we 2998 * gathered while doing the load. 2999 */ 3000 if (state == SPA_LOAD_RECOVER) { 3001 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 3002 spa->spa_load_info) == 0); 3003 } 3004 3005 if (locked) { 3006 spa->spa_last_open_failed = 0; 3007 spa->spa_last_ubsync_txg = 0; 3008 spa->spa_load_txg = 0; 3009 mutex_exit(&spa_namespace_lock); 3010#ifdef __FreeBSD__ 3011#ifdef _KERNEL 3012 if (firstopen) 3013 zvol_create_minors(spa->spa_name); 3014#endif 3015#endif 3016 } 3017 3018 *spapp = spa; 3019 3020 return (0); 3021} 3022 3023int 3024spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 3025 nvlist_t **config) 3026{ 3027 return (spa_open_common(name, spapp, tag, policy, config)); 3028} 3029 3030int 3031spa_open(const char *name, spa_t **spapp, void *tag) 3032{ 3033 return (spa_open_common(name, spapp, tag, NULL, NULL)); 3034} 3035 3036/* 3037 * Lookup the given spa_t, incrementing the inject count in the process, 3038 * preventing it from being exported or destroyed. 3039 */ 3040spa_t * 3041spa_inject_addref(char *name) 3042{ 3043 spa_t *spa; 3044 3045 mutex_enter(&spa_namespace_lock); 3046 if ((spa = spa_lookup(name)) == NULL) { 3047 mutex_exit(&spa_namespace_lock); 3048 return (NULL); 3049 } 3050 spa->spa_inject_ref++; 3051 mutex_exit(&spa_namespace_lock); 3052 3053 return (spa); 3054} 3055 3056void 3057spa_inject_delref(spa_t *spa) 3058{ 3059 mutex_enter(&spa_namespace_lock); 3060 spa->spa_inject_ref--; 3061 mutex_exit(&spa_namespace_lock); 3062} 3063 3064/* 3065 * Add spares device information to the nvlist. 3066 */ 3067static void 3068spa_add_spares(spa_t *spa, nvlist_t *config) 3069{ 3070 nvlist_t **spares; 3071 uint_t i, nspares; 3072 nvlist_t *nvroot; 3073 uint64_t guid; 3074 vdev_stat_t *vs; 3075 uint_t vsc; 3076 uint64_t pool; 3077 3078 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3079 3080 if (spa->spa_spares.sav_count == 0) 3081 return; 3082 3083 VERIFY(nvlist_lookup_nvlist(config, 3084 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3085 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 3086 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3087 if (nspares != 0) { 3088 VERIFY(nvlist_add_nvlist_array(nvroot, 3089 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3090 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3091 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3092 3093 /* 3094 * Go through and find any spares which have since been 3095 * repurposed as an active spare. If this is the case, update 3096 * their status appropriately. 3097 */ 3098 for (i = 0; i < nspares; i++) { 3099 VERIFY(nvlist_lookup_uint64(spares[i], 3100 ZPOOL_CONFIG_GUID, &guid) == 0); 3101 if (spa_spare_exists(guid, &pool, NULL) && 3102 pool != 0ULL) { 3103 VERIFY(nvlist_lookup_uint64_array( 3104 spares[i], ZPOOL_CONFIG_VDEV_STATS, 3105 (uint64_t **)&vs, &vsc) == 0); 3106 vs->vs_state = VDEV_STATE_CANT_OPEN; 3107 vs->vs_aux = VDEV_AUX_SPARED; 3108 } 3109 } 3110 } 3111} 3112 3113/* 3114 * Add l2cache device information to the nvlist, including vdev stats. 3115 */ 3116static void 3117spa_add_l2cache(spa_t *spa, nvlist_t *config) 3118{ 3119 nvlist_t **l2cache; 3120 uint_t i, j, nl2cache; 3121 nvlist_t *nvroot; 3122 uint64_t guid; 3123 vdev_t *vd; 3124 vdev_stat_t *vs; 3125 uint_t vsc; 3126 3127 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3128 3129 if (spa->spa_l2cache.sav_count == 0) 3130 return; 3131 3132 VERIFY(nvlist_lookup_nvlist(config, 3133 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3134 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 3135 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3136 if (nl2cache != 0) { 3137 VERIFY(nvlist_add_nvlist_array(nvroot, 3138 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3139 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3140 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3141 3142 /* 3143 * Update level 2 cache device stats. 3144 */ 3145 3146 for (i = 0; i < nl2cache; i++) { 3147 VERIFY(nvlist_lookup_uint64(l2cache[i], 3148 ZPOOL_CONFIG_GUID, &guid) == 0); 3149 3150 vd = NULL; 3151 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 3152 if (guid == 3153 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 3154 vd = spa->spa_l2cache.sav_vdevs[j]; 3155 break; 3156 } 3157 } 3158 ASSERT(vd != NULL); 3159 3160 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 3161 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 3162 == 0); 3163 vdev_get_stats(vd, vs); 3164 } 3165 } 3166} 3167 3168static void 3169spa_add_feature_stats(spa_t *spa, nvlist_t *config) 3170{ 3171 nvlist_t *features; 3172 zap_cursor_t zc; 3173 zap_attribute_t za; 3174 3175 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3176 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3177 3178 /* We may be unable to read features if pool is suspended. */ 3179 if (spa_suspended(spa)) 3180 goto out; 3181 3182 if (spa->spa_feat_for_read_obj != 0) { 3183 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3184 spa->spa_feat_for_read_obj); 3185 zap_cursor_retrieve(&zc, &za) == 0; 3186 zap_cursor_advance(&zc)) { 3187 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3188 za.za_num_integers == 1); 3189 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3190 za.za_first_integer)); 3191 } 3192 zap_cursor_fini(&zc); 3193 } 3194 3195 if (spa->spa_feat_for_write_obj != 0) { 3196 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3197 spa->spa_feat_for_write_obj); 3198 zap_cursor_retrieve(&zc, &za) == 0; 3199 zap_cursor_advance(&zc)) { 3200 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3201 za.za_num_integers == 1); 3202 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3203 za.za_first_integer)); 3204 } 3205 zap_cursor_fini(&zc); 3206 } 3207 3208out: 3209 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 3210 features) == 0); 3211 nvlist_free(features); 3212} 3213 3214int 3215spa_get_stats(const char *name, nvlist_t **config, 3216 char *altroot, size_t buflen) 3217{ 3218 int error; 3219 spa_t *spa; 3220 3221 *config = NULL; 3222 error = spa_open_common(name, &spa, FTAG, NULL, config); 3223 3224 if (spa != NULL) { 3225 /* 3226 * This still leaves a window of inconsistency where the spares 3227 * or l2cache devices could change and the config would be 3228 * self-inconsistent. 3229 */ 3230 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3231 3232 if (*config != NULL) { 3233 uint64_t loadtimes[2]; 3234 3235 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 3236 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 3237 VERIFY(nvlist_add_uint64_array(*config, 3238 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 3239 3240 VERIFY(nvlist_add_uint64(*config, 3241 ZPOOL_CONFIG_ERRCOUNT, 3242 spa_get_errlog_size(spa)) == 0); 3243 3244 if (spa_suspended(spa)) 3245 VERIFY(nvlist_add_uint64(*config, 3246 ZPOOL_CONFIG_SUSPENDED, 3247 spa->spa_failmode) == 0); 3248 3249 spa_add_spares(spa, *config); 3250 spa_add_l2cache(spa, *config); 3251 spa_add_feature_stats(spa, *config); 3252 } 3253 } 3254 3255 /* 3256 * We want to get the alternate root even for faulted pools, so we cheat 3257 * and call spa_lookup() directly. 3258 */ 3259 if (altroot) { 3260 if (spa == NULL) { 3261 mutex_enter(&spa_namespace_lock); 3262 spa = spa_lookup(name); 3263 if (spa) 3264 spa_altroot(spa, altroot, buflen); 3265 else 3266 altroot[0] = '\0'; 3267 spa = NULL; 3268 mutex_exit(&spa_namespace_lock); 3269 } else { 3270 spa_altroot(spa, altroot, buflen); 3271 } 3272 } 3273 3274 if (spa != NULL) { 3275 spa_config_exit(spa, SCL_CONFIG, FTAG); 3276 spa_close(spa, FTAG); 3277 } 3278 3279 return (error); 3280} 3281 3282/* 3283 * Validate that the auxiliary device array is well formed. We must have an 3284 * array of nvlists, each which describes a valid leaf vdev. If this is an 3285 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 3286 * specified, as long as they are well-formed. 3287 */ 3288static int 3289spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 3290 spa_aux_vdev_t *sav, const char *config, uint64_t version, 3291 vdev_labeltype_t label) 3292{ 3293 nvlist_t **dev; 3294 uint_t i, ndev; 3295 vdev_t *vd; 3296 int error; 3297 3298 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3299 3300 /* 3301 * It's acceptable to have no devs specified. 3302 */ 3303 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 3304 return (0); 3305 3306 if (ndev == 0) 3307 return (SET_ERROR(EINVAL)); 3308 3309 /* 3310 * Make sure the pool is formatted with a version that supports this 3311 * device type. 3312 */ 3313 if (spa_version(spa) < version) 3314 return (SET_ERROR(ENOTSUP)); 3315 3316 /* 3317 * Set the pending device list so we correctly handle device in-use 3318 * checking. 3319 */ 3320 sav->sav_pending = dev; 3321 sav->sav_npending = ndev; 3322 3323 for (i = 0; i < ndev; i++) { 3324 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 3325 mode)) != 0) 3326 goto out; 3327 3328 if (!vd->vdev_ops->vdev_op_leaf) { 3329 vdev_free(vd); 3330 error = SET_ERROR(EINVAL); 3331 goto out; 3332 } 3333 3334 /* 3335 * The L2ARC currently only supports disk devices in 3336 * kernel context. For user-level testing, we allow it. 3337 */ 3338#ifdef _KERNEL 3339 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && 3340 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { 3341 error = SET_ERROR(ENOTBLK); 3342 vdev_free(vd); 3343 goto out; 3344 } 3345#endif 3346 vd->vdev_top = vd; 3347 3348 if ((error = vdev_open(vd)) == 0 && 3349 (error = vdev_label_init(vd, crtxg, label)) == 0) { 3350 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 3351 vd->vdev_guid) == 0); 3352 } 3353 3354 vdev_free(vd); 3355 3356 if (error && 3357 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 3358 goto out; 3359 else 3360 error = 0; 3361 } 3362 3363out: 3364 sav->sav_pending = NULL; 3365 sav->sav_npending = 0; 3366 return (error); 3367} 3368 3369static int 3370spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 3371{ 3372 int error; 3373 3374 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3375 3376 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3377 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 3378 VDEV_LABEL_SPARE)) != 0) { 3379 return (error); 3380 } 3381 3382 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3383 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 3384 VDEV_LABEL_L2CACHE)); 3385} 3386 3387static void 3388spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 3389 const char *config) 3390{ 3391 int i; 3392 3393 if (sav->sav_config != NULL) { 3394 nvlist_t **olddevs; 3395 uint_t oldndevs; 3396 nvlist_t **newdevs; 3397 3398 /* 3399 * Generate new dev list by concatentating with the 3400 * current dev list. 3401 */ 3402 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 3403 &olddevs, &oldndevs) == 0); 3404 3405 newdevs = kmem_alloc(sizeof (void *) * 3406 (ndevs + oldndevs), KM_SLEEP); 3407 for (i = 0; i < oldndevs; i++) 3408 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 3409 KM_SLEEP) == 0); 3410 for (i = 0; i < ndevs; i++) 3411 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 3412 KM_SLEEP) == 0); 3413 3414 VERIFY(nvlist_remove(sav->sav_config, config, 3415 DATA_TYPE_NVLIST_ARRAY) == 0); 3416 3417 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 3418 config, newdevs, ndevs + oldndevs) == 0); 3419 for (i = 0; i < oldndevs + ndevs; i++) 3420 nvlist_free(newdevs[i]); 3421 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 3422 } else { 3423 /* 3424 * Generate a new dev list. 3425 */ 3426 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 3427 KM_SLEEP) == 0); 3428 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 3429 devs, ndevs) == 0); 3430 } 3431} 3432 3433/* 3434 * Stop and drop level 2 ARC devices 3435 */ 3436void 3437spa_l2cache_drop(spa_t *spa) 3438{ 3439 vdev_t *vd; 3440 int i; 3441 spa_aux_vdev_t *sav = &spa->spa_l2cache; 3442 3443 for (i = 0; i < sav->sav_count; i++) { 3444 uint64_t pool; 3445 3446 vd = sav->sav_vdevs[i]; 3447 ASSERT(vd != NULL); 3448 3449 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 3450 pool != 0ULL && l2arc_vdev_present(vd)) 3451 l2arc_remove_vdev(vd); 3452 } 3453} 3454 3455/* 3456 * Pool Creation 3457 */ 3458int 3459spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 3460 nvlist_t *zplprops) 3461{ 3462 spa_t *spa; 3463 char *altroot = NULL; 3464 vdev_t *rvd; 3465 dsl_pool_t *dp; 3466 dmu_tx_t *tx; 3467 int error = 0; 3468 uint64_t txg = TXG_INITIAL; 3469 nvlist_t **spares, **l2cache; 3470 uint_t nspares, nl2cache; 3471 uint64_t version, obj; 3472 boolean_t has_features; 3473 3474 /* 3475 * If this pool already exists, return failure. 3476 */ 3477 mutex_enter(&spa_namespace_lock); 3478 if (spa_lookup(pool) != NULL) { 3479 mutex_exit(&spa_namespace_lock); 3480 return (SET_ERROR(EEXIST)); 3481 } 3482 3483 /* 3484 * Allocate a new spa_t structure. 3485 */ 3486 (void) nvlist_lookup_string(props, 3487 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3488 spa = spa_add(pool, NULL, altroot); 3489 spa_activate(spa, spa_mode_global); 3490 3491 if (props && (error = spa_prop_validate(spa, props))) { 3492 spa_deactivate(spa); 3493 spa_remove(spa); 3494 mutex_exit(&spa_namespace_lock); 3495 return (error); 3496 } 3497 3498 has_features = B_FALSE; 3499 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 3500 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 3501 if (zpool_prop_feature(nvpair_name(elem))) 3502 has_features = B_TRUE; 3503 } 3504 3505 if (has_features || nvlist_lookup_uint64(props, 3506 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 3507 version = SPA_VERSION; 3508 } 3509 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 3510 3511 spa->spa_first_txg = txg; 3512 spa->spa_uberblock.ub_txg = txg - 1; 3513 spa->spa_uberblock.ub_version = version; 3514 spa->spa_ubsync = spa->spa_uberblock; 3515 3516 /* 3517 * Create "The Godfather" zio to hold all async IOs 3518 */ 3519 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 3520 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 3521 3522 /* 3523 * Create the root vdev. 3524 */ 3525 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3526 3527 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 3528 3529 ASSERT(error != 0 || rvd != NULL); 3530 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 3531 3532 if (error == 0 && !zfs_allocatable_devs(nvroot)) 3533 error = SET_ERROR(EINVAL); 3534 3535 if (error == 0 && 3536 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 3537 (error = spa_validate_aux(spa, nvroot, txg, 3538 VDEV_ALLOC_ADD)) == 0) { 3539 for (int c = 0; c < rvd->vdev_children; c++) { 3540 vdev_ashift_optimize(rvd->vdev_child[c]); 3541 vdev_metaslab_set_size(rvd->vdev_child[c]); 3542 vdev_expand(rvd->vdev_child[c], txg); 3543 } 3544 } 3545 3546 spa_config_exit(spa, SCL_ALL, FTAG); 3547 3548 if (error != 0) { 3549 spa_unload(spa); 3550 spa_deactivate(spa); 3551 spa_remove(spa); 3552 mutex_exit(&spa_namespace_lock); 3553 return (error); 3554 } 3555 3556 /* 3557 * Get the list of spares, if specified. 3558 */ 3559 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3560 &spares, &nspares) == 0) { 3561 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 3562 KM_SLEEP) == 0); 3563 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3564 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3565 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3566 spa_load_spares(spa); 3567 spa_config_exit(spa, SCL_ALL, FTAG); 3568 spa->spa_spares.sav_sync = B_TRUE; 3569 } 3570 3571 /* 3572 * Get the list of level 2 cache devices, if specified. 3573 */ 3574 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3575 &l2cache, &nl2cache) == 0) { 3576 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3577 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3578 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3579 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3580 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3581 spa_load_l2cache(spa); 3582 spa_config_exit(spa, SCL_ALL, FTAG); 3583 spa->spa_l2cache.sav_sync = B_TRUE; 3584 } 3585 3586 spa->spa_is_initializing = B_TRUE; 3587 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); 3588 spa->spa_meta_objset = dp->dp_meta_objset; 3589 spa->spa_is_initializing = B_FALSE; 3590 3591 /* 3592 * Create DDTs (dedup tables). 3593 */ 3594 ddt_create(spa); 3595 3596 spa_update_dspace(spa); 3597 3598 tx = dmu_tx_create_assigned(dp, txg); 3599 3600 /* 3601 * Create the pool config object. 3602 */ 3603 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 3604 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 3605 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 3606 3607 if (zap_add(spa->spa_meta_objset, 3608 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 3609 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 3610 cmn_err(CE_PANIC, "failed to add pool config"); 3611 } 3612 3613 if (spa_version(spa) >= SPA_VERSION_FEATURES) 3614 spa_feature_create_zap_objects(spa, tx); 3615 3616 if (zap_add(spa->spa_meta_objset, 3617 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 3618 sizeof (uint64_t), 1, &version, tx) != 0) { 3619 cmn_err(CE_PANIC, "failed to add pool version"); 3620 } 3621 3622 /* Newly created pools with the right version are always deflated. */ 3623 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 3624 spa->spa_deflate = TRUE; 3625 if (zap_add(spa->spa_meta_objset, 3626 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 3627 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 3628 cmn_err(CE_PANIC, "failed to add deflate"); 3629 } 3630 } 3631 3632 /* 3633 * Create the deferred-free bpobj. Turn off compression 3634 * because sync-to-convergence takes longer if the blocksize 3635 * keeps changing. 3636 */ 3637 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 3638 dmu_object_set_compress(spa->spa_meta_objset, obj, 3639 ZIO_COMPRESS_OFF, tx); 3640 if (zap_add(spa->spa_meta_objset, 3641 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 3642 sizeof (uint64_t), 1, &obj, tx) != 0) { 3643 cmn_err(CE_PANIC, "failed to add bpobj"); 3644 } 3645 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 3646 spa->spa_meta_objset, obj)); 3647 3648 /* 3649 * Create the pool's history object. 3650 */ 3651 if (version >= SPA_VERSION_ZPOOL_HISTORY) 3652 spa_history_create_obj(spa, tx); 3653 3654 /* 3655 * Set pool properties. 3656 */ 3657 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 3658 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3659 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 3660 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 3661 3662 if (props != NULL) { 3663 spa_configfile_set(spa, props, B_FALSE); 3664 spa_sync_props(props, tx); 3665 } 3666 3667 dmu_tx_commit(tx); 3668 3669 spa->spa_sync_on = B_TRUE; 3670 txg_sync_start(spa->spa_dsl_pool); 3671 3672 /* 3673 * We explicitly wait for the first transaction to complete so that our 3674 * bean counters are appropriately updated. 3675 */ 3676 txg_wait_synced(spa->spa_dsl_pool, txg); 3677 3678 spa_config_sync(spa, B_FALSE, B_TRUE); 3679 3680 spa_history_log_version(spa, "create"); 3681 3682 spa->spa_minref = refcount_count(&spa->spa_refcount); 3683 3684 mutex_exit(&spa_namespace_lock); 3685 3686 return (0); 3687} 3688 3689#ifdef _KERNEL 3690#if defined(sun) 3691/* 3692 * Get the root pool information from the root disk, then import the root pool 3693 * during the system boot up time. 3694 */ 3695extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 3696 3697static nvlist_t * 3698spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 3699{ 3700 nvlist_t *config; 3701 nvlist_t *nvtop, *nvroot; 3702 uint64_t pgid; 3703 3704 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 3705 return (NULL); 3706 3707 /* 3708 * Add this top-level vdev to the child array. 3709 */ 3710 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3711 &nvtop) == 0); 3712 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3713 &pgid) == 0); 3714 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 3715 3716 /* 3717 * Put this pool's top-level vdevs into a root vdev. 3718 */ 3719 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3720 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3721 VDEV_TYPE_ROOT) == 0); 3722 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3723 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3724 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3725 &nvtop, 1) == 0); 3726 3727 /* 3728 * Replace the existing vdev_tree with the new root vdev in 3729 * this pool's configuration (remove the old, add the new). 3730 */ 3731 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3732 nvlist_free(nvroot); 3733 return (config); 3734} 3735 3736/* 3737 * Walk the vdev tree and see if we can find a device with "better" 3738 * configuration. A configuration is "better" if the label on that 3739 * device has a more recent txg. 3740 */ 3741static void 3742spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 3743{ 3744 for (int c = 0; c < vd->vdev_children; c++) 3745 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 3746 3747 if (vd->vdev_ops->vdev_op_leaf) { 3748 nvlist_t *label; 3749 uint64_t label_txg; 3750 3751 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 3752 &label) != 0) 3753 return; 3754 3755 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 3756 &label_txg) == 0); 3757 3758 /* 3759 * Do we have a better boot device? 3760 */ 3761 if (label_txg > *txg) { 3762 *txg = label_txg; 3763 *avd = vd; 3764 } 3765 nvlist_free(label); 3766 } 3767} 3768 3769/* 3770 * Import a root pool. 3771 * 3772 * For x86. devpath_list will consist of devid and/or physpath name of 3773 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 3774 * The GRUB "findroot" command will return the vdev we should boot. 3775 * 3776 * For Sparc, devpath_list consists the physpath name of the booting device 3777 * no matter the rootpool is a single device pool or a mirrored pool. 3778 * e.g. 3779 * "/pci@1f,0/ide@d/disk@0,0:a" 3780 */ 3781int 3782spa_import_rootpool(char *devpath, char *devid) 3783{ 3784 spa_t *spa; 3785 vdev_t *rvd, *bvd, *avd = NULL; 3786 nvlist_t *config, *nvtop; 3787 uint64_t guid, txg; 3788 char *pname; 3789 int error; 3790 3791 /* 3792 * Read the label from the boot device and generate a configuration. 3793 */ 3794 config = spa_generate_rootconf(devpath, devid, &guid); 3795#if defined(_OBP) && defined(_KERNEL) 3796 if (config == NULL) { 3797 if (strstr(devpath, "/iscsi/ssd") != NULL) { 3798 /* iscsi boot */ 3799 get_iscsi_bootpath_phy(devpath); 3800 config = spa_generate_rootconf(devpath, devid, &guid); 3801 } 3802 } 3803#endif 3804 if (config == NULL) { 3805 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 3806 devpath); 3807 return (SET_ERROR(EIO)); 3808 } 3809 3810 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 3811 &pname) == 0); 3812 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 3813 3814 mutex_enter(&spa_namespace_lock); 3815 if ((spa = spa_lookup(pname)) != NULL) { 3816 /* 3817 * Remove the existing root pool from the namespace so that we 3818 * can replace it with the correct config we just read in. 3819 */ 3820 spa_remove(spa); 3821 } 3822 3823 spa = spa_add(pname, config, NULL); 3824 spa->spa_is_root = B_TRUE; 3825 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 3826 3827 /* 3828 * Build up a vdev tree based on the boot device's label config. 3829 */ 3830 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3831 &nvtop) == 0); 3832 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3833 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 3834 VDEV_ALLOC_ROOTPOOL); 3835 spa_config_exit(spa, SCL_ALL, FTAG); 3836 if (error) { 3837 mutex_exit(&spa_namespace_lock); 3838 nvlist_free(config); 3839 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 3840 pname); 3841 return (error); 3842 } 3843 3844 /* 3845 * Get the boot vdev. 3846 */ 3847 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 3848 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 3849 (u_longlong_t)guid); 3850 error = SET_ERROR(ENOENT); 3851 goto out; 3852 } 3853 3854 /* 3855 * Determine if there is a better boot device. 3856 */ 3857 avd = bvd; 3858 spa_alt_rootvdev(rvd, &avd, &txg); 3859 if (avd != bvd) { 3860 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 3861 "try booting from '%s'", avd->vdev_path); 3862 error = SET_ERROR(EINVAL); 3863 goto out; 3864 } 3865 3866 /* 3867 * If the boot device is part of a spare vdev then ensure that 3868 * we're booting off the active spare. 3869 */ 3870 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 3871 !bvd->vdev_isspare) { 3872 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 3873 "try booting from '%s'", 3874 bvd->vdev_parent-> 3875 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 3876 error = SET_ERROR(EINVAL); 3877 goto out; 3878 } 3879 3880 error = 0; 3881out: 3882 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3883 vdev_free(rvd); 3884 spa_config_exit(spa, SCL_ALL, FTAG); 3885 mutex_exit(&spa_namespace_lock); 3886 3887 nvlist_free(config); 3888 return (error); 3889} 3890 3891#else 3892 3893extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs, 3894 uint64_t *count); 3895 3896static nvlist_t * 3897spa_generate_rootconf(const char *name) 3898{ 3899 nvlist_t **configs, **tops; 3900 nvlist_t *config; 3901 nvlist_t *best_cfg, *nvtop, *nvroot; 3902 uint64_t *holes; 3903 uint64_t best_txg; 3904 uint64_t nchildren; 3905 uint64_t pgid; 3906 uint64_t count; 3907 uint64_t i; 3908 uint_t nholes; 3909 3910 if (vdev_geom_read_pool_label(name, &configs, &count) != 0) 3911 return (NULL); 3912 3913 ASSERT3U(count, !=, 0); 3914 best_txg = 0; 3915 for (i = 0; i < count; i++) { 3916 uint64_t txg; 3917 3918 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG, 3919 &txg) == 0); 3920 if (txg > best_txg) { 3921 best_txg = txg; 3922 best_cfg = configs[i]; 3923 } 3924 } 3925 3926 /* 3927 * Multi-vdev root pool configuration discovery is not supported yet. 3928 */ 3929 nchildren = 1; 3930 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren); 3931 holes = NULL; 3932 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY, 3933 &holes, &nholes); 3934 3935 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP); 3936 for (i = 0; i < nchildren; i++) { 3937 if (i >= count) 3938 break; 3939 if (configs[i] == NULL) 3940 continue; 3941 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE, 3942 &nvtop) == 0); 3943 nvlist_dup(nvtop, &tops[i], KM_SLEEP); 3944 } 3945 for (i = 0; holes != NULL && i < nholes; i++) { 3946 if (i >= nchildren) 3947 continue; 3948 if (tops[holes[i]] != NULL) 3949 continue; 3950 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP); 3951 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE, 3952 VDEV_TYPE_HOLE) == 0); 3953 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, 3954 holes[i]) == 0); 3955 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 3956 0) == 0); 3957 } 3958 for (i = 0; i < nchildren; i++) { 3959 if (tops[i] != NULL) 3960 continue; 3961 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP); 3962 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE, 3963 VDEV_TYPE_MISSING) == 0); 3964 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, 3965 i) == 0); 3966 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 3967 0) == 0); 3968 } 3969 3970 /* 3971 * Create pool config based on the best vdev config. 3972 */ 3973 nvlist_dup(best_cfg, &config, KM_SLEEP); 3974 3975 /* 3976 * Put this pool's top-level vdevs into a root vdev. 3977 */ 3978 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3979 &pgid) == 0); 3980 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3981 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3982 VDEV_TYPE_ROOT) == 0); 3983 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3984 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3985 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3986 tops, nchildren) == 0); 3987 3988 /* 3989 * Replace the existing vdev_tree with the new root vdev in 3990 * this pool's configuration (remove the old, add the new). 3991 */ 3992 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3993 3994 /* 3995 * Drop vdev config elements that should not be present at pool level. 3996 */ 3997 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64); 3998 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64); 3999 4000 for (i = 0; i < count; i++) 4001 nvlist_free(configs[i]); 4002 kmem_free(configs, count * sizeof(void *)); 4003 for (i = 0; i < nchildren; i++) 4004 nvlist_free(tops[i]); 4005 kmem_free(tops, nchildren * sizeof(void *)); 4006 nvlist_free(nvroot); 4007 return (config); 4008} 4009 4010int 4011spa_import_rootpool(const char *name) 4012{ 4013 spa_t *spa; 4014 vdev_t *rvd, *bvd, *avd = NULL; 4015 nvlist_t *config, *nvtop; 4016 uint64_t txg; 4017 char *pname; 4018 int error; 4019 4020 /* 4021 * Read the label from the boot device and generate a configuration. 4022 */ 4023 config = spa_generate_rootconf(name); 4024 4025 mutex_enter(&spa_namespace_lock); 4026 if (config != NULL) { 4027 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 4028 &pname) == 0 && strcmp(name, pname) == 0); 4029 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) 4030 == 0); 4031 4032 if ((spa = spa_lookup(pname)) != NULL) { 4033 /* 4034 * Remove the existing root pool from the namespace so 4035 * that we can replace it with the correct config 4036 * we just read in. 4037 */ 4038 spa_remove(spa); 4039 } 4040 spa = spa_add(pname, config, NULL); 4041 4042 /* 4043 * Set spa_ubsync.ub_version as it can be used in vdev_alloc() 4044 * via spa_version(). 4045 */ 4046 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 4047 &spa->spa_ubsync.ub_version) != 0) 4048 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 4049 } else if ((spa = spa_lookup(name)) == NULL) { 4050 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'", 4051 name); 4052 return (EIO); 4053 } else { 4054 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0); 4055 } 4056 spa->spa_is_root = B_TRUE; 4057 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 4058 4059 /* 4060 * Build up a vdev tree based on the boot device's label config. 4061 */ 4062 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4063 &nvtop) == 0); 4064 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4065 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 4066 VDEV_ALLOC_ROOTPOOL); 4067 spa_config_exit(spa, SCL_ALL, FTAG); 4068 if (error) { 4069 mutex_exit(&spa_namespace_lock); 4070 nvlist_free(config); 4071 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 4072 pname); 4073 return (error); 4074 } 4075 4076 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4077 vdev_free(rvd); 4078 spa_config_exit(spa, SCL_ALL, FTAG); 4079 mutex_exit(&spa_namespace_lock); 4080 4081 nvlist_free(config); 4082 return (0); 4083} 4084 4085#endif /* sun */ 4086#endif 4087 4088/* 4089 * Import a non-root pool into the system. 4090 */ 4091int 4092spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 4093{ 4094 spa_t *spa; 4095 char *altroot = NULL; 4096 spa_load_state_t state = SPA_LOAD_IMPORT; 4097 zpool_rewind_policy_t policy; 4098 uint64_t mode = spa_mode_global; 4099 uint64_t readonly = B_FALSE; 4100 int error; 4101 nvlist_t *nvroot; 4102 nvlist_t **spares, **l2cache; 4103 uint_t nspares, nl2cache; 4104 4105 /* 4106 * If a pool with this name exists, return failure. 4107 */ 4108 mutex_enter(&spa_namespace_lock); 4109 if (spa_lookup(pool) != NULL) { 4110 mutex_exit(&spa_namespace_lock); 4111 return (SET_ERROR(EEXIST)); 4112 } 4113 4114 /* 4115 * Create and initialize the spa structure. 4116 */ 4117 (void) nvlist_lookup_string(props, 4118 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 4119 (void) nvlist_lookup_uint64(props, 4120 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 4121 if (readonly) 4122 mode = FREAD; 4123 spa = spa_add(pool, config, altroot); 4124 spa->spa_import_flags = flags; 4125 4126 /* 4127 * Verbatim import - Take a pool and insert it into the namespace 4128 * as if it had been loaded at boot. 4129 */ 4130 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 4131 if (props != NULL) 4132 spa_configfile_set(spa, props, B_FALSE); 4133 4134 spa_config_sync(spa, B_FALSE, B_TRUE); 4135 4136 mutex_exit(&spa_namespace_lock); 4137 return (0); 4138 } 4139 4140 spa_activate(spa, mode); 4141 4142 /* 4143 * Don't start async tasks until we know everything is healthy. 4144 */ 4145 spa_async_suspend(spa); 4146 4147 zpool_get_rewind_policy(config, &policy); 4148 if (policy.zrp_request & ZPOOL_DO_REWIND) 4149 state = SPA_LOAD_RECOVER; 4150 4151 /* 4152 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig 4153 * because the user-supplied config is actually the one to trust when 4154 * doing an import. 4155 */ 4156 if (state != SPA_LOAD_RECOVER) 4157 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 4158 4159 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, 4160 policy.zrp_request); 4161 4162 /* 4163 * Propagate anything learned while loading the pool and pass it 4164 * back to caller (i.e. rewind info, missing devices, etc). 4165 */ 4166 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4167 spa->spa_load_info) == 0); 4168 4169 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4170 /* 4171 * Toss any existing sparelist, as it doesn't have any validity 4172 * anymore, and conflicts with spa_has_spare(). 4173 */ 4174 if (spa->spa_spares.sav_config) { 4175 nvlist_free(spa->spa_spares.sav_config); 4176 spa->spa_spares.sav_config = NULL; 4177 spa_load_spares(spa); 4178 } 4179 if (spa->spa_l2cache.sav_config) { 4180 nvlist_free(spa->spa_l2cache.sav_config); 4181 spa->spa_l2cache.sav_config = NULL; 4182 spa_load_l2cache(spa); 4183 } 4184 4185 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4186 &nvroot) == 0); 4187 if (error == 0) 4188 error = spa_validate_aux(spa, nvroot, -1ULL, 4189 VDEV_ALLOC_SPARE); 4190 if (error == 0) 4191 error = spa_validate_aux(spa, nvroot, -1ULL, 4192 VDEV_ALLOC_L2CACHE); 4193 spa_config_exit(spa, SCL_ALL, FTAG); 4194 4195 if (props != NULL) 4196 spa_configfile_set(spa, props, B_FALSE); 4197 4198 if (error != 0 || (props && spa_writeable(spa) && 4199 (error = spa_prop_set(spa, props)))) { 4200 spa_unload(spa); 4201 spa_deactivate(spa); 4202 spa_remove(spa); 4203 mutex_exit(&spa_namespace_lock); 4204 return (error); 4205 } 4206 4207 spa_async_resume(spa); 4208 4209 /* 4210 * Override any spares and level 2 cache devices as specified by 4211 * the user, as these may have correct device names/devids, etc. 4212 */ 4213 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 4214 &spares, &nspares) == 0) { 4215 if (spa->spa_spares.sav_config) 4216 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 4217 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 4218 else 4219 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 4220 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4221 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 4222 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 4223 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4224 spa_load_spares(spa); 4225 spa_config_exit(spa, SCL_ALL, FTAG); 4226 spa->spa_spares.sav_sync = B_TRUE; 4227 } 4228 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 4229 &l2cache, &nl2cache) == 0) { 4230 if (spa->spa_l2cache.sav_config) 4231 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 4232 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 4233 else 4234 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 4235 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4236 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 4237 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 4238 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4239 spa_load_l2cache(spa); 4240 spa_config_exit(spa, SCL_ALL, FTAG); 4241 spa->spa_l2cache.sav_sync = B_TRUE; 4242 } 4243 4244 /* 4245 * Check for any removed devices. 4246 */ 4247 if (spa->spa_autoreplace) { 4248 spa_aux_check_removed(&spa->spa_spares); 4249 spa_aux_check_removed(&spa->spa_l2cache); 4250 } 4251 4252 if (spa_writeable(spa)) { 4253 /* 4254 * Update the config cache to include the newly-imported pool. 4255 */ 4256 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4257 } 4258 4259 /* 4260 * It's possible that the pool was expanded while it was exported. 4261 * We kick off an async task to handle this for us. 4262 */ 4263 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 4264 4265 mutex_exit(&spa_namespace_lock); 4266 spa_history_log_version(spa, "import"); 4267 4268#ifdef __FreeBSD__ 4269#ifdef _KERNEL 4270 zvol_create_minors(pool); 4271#endif 4272#endif 4273 return (0); 4274} 4275 4276nvlist_t * 4277spa_tryimport(nvlist_t *tryconfig) 4278{ 4279 nvlist_t *config = NULL; 4280 char *poolname; 4281 spa_t *spa; 4282 uint64_t state; 4283 int error; 4284 4285 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 4286 return (NULL); 4287 4288 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 4289 return (NULL); 4290 4291 /* 4292 * Create and initialize the spa structure. 4293 */ 4294 mutex_enter(&spa_namespace_lock); 4295 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 4296 spa_activate(spa, FREAD); 4297 4298 /* 4299 * Pass off the heavy lifting to spa_load(). 4300 * Pass TRUE for mosconfig because the user-supplied config 4301 * is actually the one to trust when doing an import. 4302 */ 4303 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); 4304 4305 /* 4306 * If 'tryconfig' was at least parsable, return the current config. 4307 */ 4308 if (spa->spa_root_vdev != NULL) { 4309 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4310 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 4311 poolname) == 0); 4312 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 4313 state) == 0); 4314 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 4315 spa->spa_uberblock.ub_timestamp) == 0); 4316 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4317 spa->spa_load_info) == 0); 4318 4319 /* 4320 * If the bootfs property exists on this pool then we 4321 * copy it out so that external consumers can tell which 4322 * pools are bootable. 4323 */ 4324 if ((!error || error == EEXIST) && spa->spa_bootfs) { 4325 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4326 4327 /* 4328 * We have to play games with the name since the 4329 * pool was opened as TRYIMPORT_NAME. 4330 */ 4331 if (dsl_dsobj_to_dsname(spa_name(spa), 4332 spa->spa_bootfs, tmpname) == 0) { 4333 char *cp; 4334 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4335 4336 cp = strchr(tmpname, '/'); 4337 if (cp == NULL) { 4338 (void) strlcpy(dsname, tmpname, 4339 MAXPATHLEN); 4340 } else { 4341 (void) snprintf(dsname, MAXPATHLEN, 4342 "%s/%s", poolname, ++cp); 4343 } 4344 VERIFY(nvlist_add_string(config, 4345 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 4346 kmem_free(dsname, MAXPATHLEN); 4347 } 4348 kmem_free(tmpname, MAXPATHLEN); 4349 } 4350 4351 /* 4352 * Add the list of hot spares and level 2 cache devices. 4353 */ 4354 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4355 spa_add_spares(spa, config); 4356 spa_add_l2cache(spa, config); 4357 spa_config_exit(spa, SCL_CONFIG, FTAG); 4358 } 4359 4360 spa_unload(spa); 4361 spa_deactivate(spa); 4362 spa_remove(spa); 4363 mutex_exit(&spa_namespace_lock); 4364 4365 return (config); 4366} 4367 4368/* 4369 * Pool export/destroy 4370 * 4371 * The act of destroying or exporting a pool is very simple. We make sure there 4372 * is no more pending I/O and any references to the pool are gone. Then, we 4373 * update the pool state and sync all the labels to disk, removing the 4374 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 4375 * we don't sync the labels or remove the configuration cache. 4376 */ 4377static int 4378spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 4379 boolean_t force, boolean_t hardforce) 4380{ 4381 spa_t *spa; 4382 4383 if (oldconfig) 4384 *oldconfig = NULL; 4385 4386 if (!(spa_mode_global & FWRITE)) 4387 return (SET_ERROR(EROFS)); 4388 4389 mutex_enter(&spa_namespace_lock); 4390 if ((spa = spa_lookup(pool)) == NULL) { 4391 mutex_exit(&spa_namespace_lock); 4392 return (SET_ERROR(ENOENT)); 4393 } 4394 4395 /* 4396 * Put a hold on the pool, drop the namespace lock, stop async tasks, 4397 * reacquire the namespace lock, and see if we can export. 4398 */ 4399 spa_open_ref(spa, FTAG); 4400 mutex_exit(&spa_namespace_lock); 4401 spa_async_suspend(spa); 4402 mutex_enter(&spa_namespace_lock); 4403 spa_close(spa, FTAG); 4404 4405 /* 4406 * The pool will be in core if it's openable, 4407 * in which case we can modify its state. 4408 */ 4409 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 4410 /* 4411 * Objsets may be open only because they're dirty, so we 4412 * have to force it to sync before checking spa_refcnt. 4413 */ 4414 txg_wait_synced(spa->spa_dsl_pool, 0); 4415 4416 /* 4417 * A pool cannot be exported or destroyed if there are active 4418 * references. If we are resetting a pool, allow references by 4419 * fault injection handlers. 4420 */ 4421 if (!spa_refcount_zero(spa) || 4422 (spa->spa_inject_ref != 0 && 4423 new_state != POOL_STATE_UNINITIALIZED)) { 4424 spa_async_resume(spa); 4425 mutex_exit(&spa_namespace_lock); 4426 return (SET_ERROR(EBUSY)); 4427 } 4428 4429 /* 4430 * A pool cannot be exported if it has an active shared spare. 4431 * This is to prevent other pools stealing the active spare 4432 * from an exported pool. At user's own will, such pool can 4433 * be forcedly exported. 4434 */ 4435 if (!force && new_state == POOL_STATE_EXPORTED && 4436 spa_has_active_shared_spare(spa)) { 4437 spa_async_resume(spa); 4438 mutex_exit(&spa_namespace_lock); 4439 return (SET_ERROR(EXDEV)); 4440 } 4441 4442 /* 4443 * We want this to be reflected on every label, 4444 * so mark them all dirty. spa_unload() will do the 4445 * final sync that pushes these changes out. 4446 */ 4447 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 4448 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4449 spa->spa_state = new_state; 4450 spa->spa_final_txg = spa_last_synced_txg(spa) + 4451 TXG_DEFER_SIZE + 1; 4452 vdev_config_dirty(spa->spa_root_vdev); 4453 spa_config_exit(spa, SCL_ALL, FTAG); 4454 } 4455 } 4456 4457 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY); 4458 4459 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 4460 spa_unload(spa); 4461 spa_deactivate(spa); 4462 } 4463 4464 if (oldconfig && spa->spa_config) 4465 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 4466 4467 if (new_state != POOL_STATE_UNINITIALIZED) { 4468 if (!hardforce) 4469 spa_config_sync(spa, B_TRUE, B_TRUE); 4470 spa_remove(spa); 4471 } 4472 mutex_exit(&spa_namespace_lock); 4473 4474 return (0); 4475} 4476 4477/* 4478 * Destroy a storage pool. 4479 */ 4480int 4481spa_destroy(char *pool) 4482{ 4483 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 4484 B_FALSE, B_FALSE)); 4485} 4486 4487/* 4488 * Export a storage pool. 4489 */ 4490int 4491spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 4492 boolean_t hardforce) 4493{ 4494 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 4495 force, hardforce)); 4496} 4497 4498/* 4499 * Similar to spa_export(), this unloads the spa_t without actually removing it 4500 * from the namespace in any way. 4501 */ 4502int 4503spa_reset(char *pool) 4504{ 4505 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 4506 B_FALSE, B_FALSE)); 4507} 4508 4509/* 4510 * ========================================================================== 4511 * Device manipulation 4512 * ========================================================================== 4513 */ 4514 4515/* 4516 * Add a device to a storage pool. 4517 */ 4518int 4519spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 4520{ 4521 uint64_t txg, id; 4522 int error; 4523 vdev_t *rvd = spa->spa_root_vdev; 4524 vdev_t *vd, *tvd; 4525 nvlist_t **spares, **l2cache; 4526 uint_t nspares, nl2cache; 4527 4528 ASSERT(spa_writeable(spa)); 4529 4530 txg = spa_vdev_enter(spa); 4531 4532 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 4533 VDEV_ALLOC_ADD)) != 0) 4534 return (spa_vdev_exit(spa, NULL, txg, error)); 4535 4536 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 4537 4538 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 4539 &nspares) != 0) 4540 nspares = 0; 4541 4542 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 4543 &nl2cache) != 0) 4544 nl2cache = 0; 4545 4546 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 4547 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 4548 4549 if (vd->vdev_children != 0 && 4550 (error = vdev_create(vd, txg, B_FALSE)) != 0) 4551 return (spa_vdev_exit(spa, vd, txg, error)); 4552 4553 /* 4554 * We must validate the spares and l2cache devices after checking the 4555 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 4556 */ 4557 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 4558 return (spa_vdev_exit(spa, vd, txg, error)); 4559 4560 /* 4561 * Transfer each new top-level vdev from vd to rvd. 4562 */ 4563 for (int c = 0; c < vd->vdev_children; c++) { 4564 4565 /* 4566 * Set the vdev id to the first hole, if one exists. 4567 */ 4568 for (id = 0; id < rvd->vdev_children; id++) { 4569 if (rvd->vdev_child[id]->vdev_ishole) { 4570 vdev_free(rvd->vdev_child[id]); 4571 break; 4572 } 4573 } 4574 tvd = vd->vdev_child[c]; 4575 vdev_remove_child(vd, tvd); 4576 tvd->vdev_id = id; 4577 vdev_add_child(rvd, tvd); 4578 vdev_config_dirty(tvd); 4579 } 4580 4581 if (nspares != 0) { 4582 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 4583 ZPOOL_CONFIG_SPARES); 4584 spa_load_spares(spa); 4585 spa->spa_spares.sav_sync = B_TRUE; 4586 } 4587 4588 if (nl2cache != 0) { 4589 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 4590 ZPOOL_CONFIG_L2CACHE); 4591 spa_load_l2cache(spa); 4592 spa->spa_l2cache.sav_sync = B_TRUE; 4593 } 4594 4595 /* 4596 * We have to be careful when adding new vdevs to an existing pool. 4597 * If other threads start allocating from these vdevs before we 4598 * sync the config cache, and we lose power, then upon reboot we may 4599 * fail to open the pool because there are DVAs that the config cache 4600 * can't translate. Therefore, we first add the vdevs without 4601 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 4602 * and then let spa_config_update() initialize the new metaslabs. 4603 * 4604 * spa_load() checks for added-but-not-initialized vdevs, so that 4605 * if we lose power at any point in this sequence, the remaining 4606 * steps will be completed the next time we load the pool. 4607 */ 4608 (void) spa_vdev_exit(spa, vd, txg, 0); 4609 4610 mutex_enter(&spa_namespace_lock); 4611 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4612 mutex_exit(&spa_namespace_lock); 4613 4614 return (0); 4615} 4616 4617/* 4618 * Attach a device to a mirror. The arguments are the path to any device 4619 * in the mirror, and the nvroot for the new device. If the path specifies 4620 * a device that is not mirrored, we automatically insert the mirror vdev. 4621 * 4622 * If 'replacing' is specified, the new device is intended to replace the 4623 * existing device; in this case the two devices are made into their own 4624 * mirror using the 'replacing' vdev, which is functionally identical to 4625 * the mirror vdev (it actually reuses all the same ops) but has a few 4626 * extra rules: you can't attach to it after it's been created, and upon 4627 * completion of resilvering, the first disk (the one being replaced) 4628 * is automatically detached. 4629 */ 4630int 4631spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 4632{ 4633 uint64_t txg, dtl_max_txg; 4634 vdev_t *rvd = spa->spa_root_vdev; 4635 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 4636 vdev_ops_t *pvops; 4637 char *oldvdpath, *newvdpath; 4638 int newvd_isspare; 4639 int error; 4640 4641 ASSERT(spa_writeable(spa)); 4642 4643 txg = spa_vdev_enter(spa); 4644 4645 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 4646 4647 if (oldvd == NULL) 4648 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4649 4650 if (!oldvd->vdev_ops->vdev_op_leaf) 4651 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4652 4653 pvd = oldvd->vdev_parent; 4654 4655 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 4656 VDEV_ALLOC_ATTACH)) != 0) 4657 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4658 4659 if (newrootvd->vdev_children != 1) 4660 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4661 4662 newvd = newrootvd->vdev_child[0]; 4663 4664 if (!newvd->vdev_ops->vdev_op_leaf) 4665 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4666 4667 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 4668 return (spa_vdev_exit(spa, newrootvd, txg, error)); 4669 4670 /* 4671 * Spares can't replace logs 4672 */ 4673 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 4674 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4675 4676 if (!replacing) { 4677 /* 4678 * For attach, the only allowable parent is a mirror or the root 4679 * vdev. 4680 */ 4681 if (pvd->vdev_ops != &vdev_mirror_ops && 4682 pvd->vdev_ops != &vdev_root_ops) 4683 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4684 4685 pvops = &vdev_mirror_ops; 4686 } else { 4687 /* 4688 * Active hot spares can only be replaced by inactive hot 4689 * spares. 4690 */ 4691 if (pvd->vdev_ops == &vdev_spare_ops && 4692 oldvd->vdev_isspare && 4693 !spa_has_spare(spa, newvd->vdev_guid)) 4694 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4695 4696 /* 4697 * If the source is a hot spare, and the parent isn't already a 4698 * spare, then we want to create a new hot spare. Otherwise, we 4699 * want to create a replacing vdev. The user is not allowed to 4700 * attach to a spared vdev child unless the 'isspare' state is 4701 * the same (spare replaces spare, non-spare replaces 4702 * non-spare). 4703 */ 4704 if (pvd->vdev_ops == &vdev_replacing_ops && 4705 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 4706 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4707 } else if (pvd->vdev_ops == &vdev_spare_ops && 4708 newvd->vdev_isspare != oldvd->vdev_isspare) { 4709 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4710 } 4711 4712 if (newvd->vdev_isspare) 4713 pvops = &vdev_spare_ops; 4714 else 4715 pvops = &vdev_replacing_ops; 4716 } 4717 4718 /* 4719 * Make sure the new device is big enough. 4720 */ 4721 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 4722 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 4723 4724 /* 4725 * The new device cannot have a higher alignment requirement 4726 * than the top-level vdev. 4727 */ 4728 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 4729 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 4730 4731 /* 4732 * If this is an in-place replacement, update oldvd's path and devid 4733 * to make it distinguishable from newvd, and unopenable from now on. 4734 */ 4735 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 4736 spa_strfree(oldvd->vdev_path); 4737 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 4738 KM_SLEEP); 4739 (void) sprintf(oldvd->vdev_path, "%s/%s", 4740 newvd->vdev_path, "old"); 4741 if (oldvd->vdev_devid != NULL) { 4742 spa_strfree(oldvd->vdev_devid); 4743 oldvd->vdev_devid = NULL; 4744 } 4745 } 4746 4747 /* mark the device being resilvered */ 4748 newvd->vdev_resilver_txg = txg; 4749 4750 /* 4751 * If the parent is not a mirror, or if we're replacing, insert the new 4752 * mirror/replacing/spare vdev above oldvd. 4753 */ 4754 if (pvd->vdev_ops != pvops) 4755 pvd = vdev_add_parent(oldvd, pvops); 4756 4757 ASSERT(pvd->vdev_top->vdev_parent == rvd); 4758 ASSERT(pvd->vdev_ops == pvops); 4759 ASSERT(oldvd->vdev_parent == pvd); 4760 4761 /* 4762 * Extract the new device from its root and add it to pvd. 4763 */ 4764 vdev_remove_child(newrootvd, newvd); 4765 newvd->vdev_id = pvd->vdev_children; 4766 newvd->vdev_crtxg = oldvd->vdev_crtxg; 4767 vdev_add_child(pvd, newvd); 4768 4769 tvd = newvd->vdev_top; 4770 ASSERT(pvd->vdev_top == tvd); 4771 ASSERT(tvd->vdev_parent == rvd); 4772 4773 vdev_config_dirty(tvd); 4774 4775 /* 4776 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 4777 * for any dmu_sync-ed blocks. It will propagate upward when 4778 * spa_vdev_exit() calls vdev_dtl_reassess(). 4779 */ 4780 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 4781 4782 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 4783 dtl_max_txg - TXG_INITIAL); 4784 4785 if (newvd->vdev_isspare) { 4786 spa_spare_activate(newvd); 4787 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE); 4788 } 4789 4790 oldvdpath = spa_strdup(oldvd->vdev_path); 4791 newvdpath = spa_strdup(newvd->vdev_path); 4792 newvd_isspare = newvd->vdev_isspare; 4793 4794 /* 4795 * Mark newvd's DTL dirty in this txg. 4796 */ 4797 vdev_dirty(tvd, VDD_DTL, newvd, txg); 4798 4799 /* 4800 * Schedule the resilver to restart in the future. We do this to 4801 * ensure that dmu_sync-ed blocks have been stitched into the 4802 * respective datasets. 4803 */ 4804 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); 4805 4806 /* 4807 * Commit the config 4808 */ 4809 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 4810 4811 spa_history_log_internal(spa, "vdev attach", NULL, 4812 "%s vdev=%s %s vdev=%s", 4813 replacing && newvd_isspare ? "spare in" : 4814 replacing ? "replace" : "attach", newvdpath, 4815 replacing ? "for" : "to", oldvdpath); 4816 4817 spa_strfree(oldvdpath); 4818 spa_strfree(newvdpath); 4819 4820 if (spa->spa_bootfs) 4821 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH); 4822 4823 return (0); 4824} 4825 4826/* 4827 * Detach a device from a mirror or replacing vdev. 4828 * 4829 * If 'replace_done' is specified, only detach if the parent 4830 * is a replacing vdev. 4831 */ 4832int 4833spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 4834{ 4835 uint64_t txg; 4836 int error; 4837 vdev_t *rvd = spa->spa_root_vdev; 4838 vdev_t *vd, *pvd, *cvd, *tvd; 4839 boolean_t unspare = B_FALSE; 4840 uint64_t unspare_guid = 0; 4841 char *vdpath; 4842 4843 ASSERT(spa_writeable(spa)); 4844 4845 txg = spa_vdev_enter(spa); 4846 4847 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 4848 4849 if (vd == NULL) 4850 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4851 4852 if (!vd->vdev_ops->vdev_op_leaf) 4853 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4854 4855 pvd = vd->vdev_parent; 4856 4857 /* 4858 * If the parent/child relationship is not as expected, don't do it. 4859 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 4860 * vdev that's replacing B with C. The user's intent in replacing 4861 * is to go from M(A,B) to M(A,C). If the user decides to cancel 4862 * the replace by detaching C, the expected behavior is to end up 4863 * M(A,B). But suppose that right after deciding to detach C, 4864 * the replacement of B completes. We would have M(A,C), and then 4865 * ask to detach C, which would leave us with just A -- not what 4866 * the user wanted. To prevent this, we make sure that the 4867 * parent/child relationship hasn't changed -- in this example, 4868 * that C's parent is still the replacing vdev R. 4869 */ 4870 if (pvd->vdev_guid != pguid && pguid != 0) 4871 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4872 4873 /* 4874 * Only 'replacing' or 'spare' vdevs can be replaced. 4875 */ 4876 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 4877 pvd->vdev_ops != &vdev_spare_ops) 4878 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4879 4880 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 4881 spa_version(spa) >= SPA_VERSION_SPARES); 4882 4883 /* 4884 * Only mirror, replacing, and spare vdevs support detach. 4885 */ 4886 if (pvd->vdev_ops != &vdev_replacing_ops && 4887 pvd->vdev_ops != &vdev_mirror_ops && 4888 pvd->vdev_ops != &vdev_spare_ops) 4889 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4890 4891 /* 4892 * If this device has the only valid copy of some data, 4893 * we cannot safely detach it. 4894 */ 4895 if (vdev_dtl_required(vd)) 4896 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4897 4898 ASSERT(pvd->vdev_children >= 2); 4899 4900 /* 4901 * If we are detaching the second disk from a replacing vdev, then 4902 * check to see if we changed the original vdev's path to have "/old" 4903 * at the end in spa_vdev_attach(). If so, undo that change now. 4904 */ 4905 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 4906 vd->vdev_path != NULL) { 4907 size_t len = strlen(vd->vdev_path); 4908 4909 for (int c = 0; c < pvd->vdev_children; c++) { 4910 cvd = pvd->vdev_child[c]; 4911 4912 if (cvd == vd || cvd->vdev_path == NULL) 4913 continue; 4914 4915 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 4916 strcmp(cvd->vdev_path + len, "/old") == 0) { 4917 spa_strfree(cvd->vdev_path); 4918 cvd->vdev_path = spa_strdup(vd->vdev_path); 4919 break; 4920 } 4921 } 4922 } 4923 4924 /* 4925 * If we are detaching the original disk from a spare, then it implies 4926 * that the spare should become a real disk, and be removed from the 4927 * active spare list for the pool. 4928 */ 4929 if (pvd->vdev_ops == &vdev_spare_ops && 4930 vd->vdev_id == 0 && 4931 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 4932 unspare = B_TRUE; 4933 4934 /* 4935 * Erase the disk labels so the disk can be used for other things. 4936 * This must be done after all other error cases are handled, 4937 * but before we disembowel vd (so we can still do I/O to it). 4938 * But if we can't do it, don't treat the error as fatal -- 4939 * it may be that the unwritability of the disk is the reason 4940 * it's being detached! 4941 */ 4942 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 4943 4944 /* 4945 * Remove vd from its parent and compact the parent's children. 4946 */ 4947 vdev_remove_child(pvd, vd); 4948 vdev_compact_children(pvd); 4949 4950 /* 4951 * Remember one of the remaining children so we can get tvd below. 4952 */ 4953 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 4954 4955 /* 4956 * If we need to remove the remaining child from the list of hot spares, 4957 * do it now, marking the vdev as no longer a spare in the process. 4958 * We must do this before vdev_remove_parent(), because that can 4959 * change the GUID if it creates a new toplevel GUID. For a similar 4960 * reason, we must remove the spare now, in the same txg as the detach; 4961 * otherwise someone could attach a new sibling, change the GUID, and 4962 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 4963 */ 4964 if (unspare) { 4965 ASSERT(cvd->vdev_isspare); 4966 spa_spare_remove(cvd); 4967 unspare_guid = cvd->vdev_guid; 4968 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 4969 cvd->vdev_unspare = B_TRUE; 4970 } 4971 4972 /* 4973 * If the parent mirror/replacing vdev only has one child, 4974 * the parent is no longer needed. Remove it from the tree. 4975 */ 4976 if (pvd->vdev_children == 1) { 4977 if (pvd->vdev_ops == &vdev_spare_ops) 4978 cvd->vdev_unspare = B_FALSE; 4979 vdev_remove_parent(cvd); 4980 } 4981 4982 4983 /* 4984 * We don't set tvd until now because the parent we just removed 4985 * may have been the previous top-level vdev. 4986 */ 4987 tvd = cvd->vdev_top; 4988 ASSERT(tvd->vdev_parent == rvd); 4989 4990 /* 4991 * Reevaluate the parent vdev state. 4992 */ 4993 vdev_propagate_state(cvd); 4994 4995 /* 4996 * If the 'autoexpand' property is set on the pool then automatically 4997 * try to expand the size of the pool. For example if the device we 4998 * just detached was smaller than the others, it may be possible to 4999 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 5000 * first so that we can obtain the updated sizes of the leaf vdevs. 5001 */ 5002 if (spa->spa_autoexpand) { 5003 vdev_reopen(tvd); 5004 vdev_expand(tvd, txg); 5005 } 5006 5007 vdev_config_dirty(tvd); 5008 5009 /* 5010 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 5011 * vd->vdev_detached is set and free vd's DTL object in syncing context. 5012 * But first make sure we're not on any *other* txg's DTL list, to 5013 * prevent vd from being accessed after it's freed. 5014 */ 5015 vdpath = spa_strdup(vd->vdev_path); 5016 for (int t = 0; t < TXG_SIZE; t++) 5017 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 5018 vd->vdev_detached = B_TRUE; 5019 vdev_dirty(tvd, VDD_DTL, vd, txg); 5020 5021 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE); 5022 5023 /* hang on to the spa before we release the lock */ 5024 spa_open_ref(spa, FTAG); 5025 5026 error = spa_vdev_exit(spa, vd, txg, 0); 5027 5028 spa_history_log_internal(spa, "detach", NULL, 5029 "vdev=%s", vdpath); 5030 spa_strfree(vdpath); 5031 5032 /* 5033 * If this was the removal of the original device in a hot spare vdev, 5034 * then we want to go through and remove the device from the hot spare 5035 * list of every other pool. 5036 */ 5037 if (unspare) { 5038 spa_t *altspa = NULL; 5039 5040 mutex_enter(&spa_namespace_lock); 5041 while ((altspa = spa_next(altspa)) != NULL) { 5042 if (altspa->spa_state != POOL_STATE_ACTIVE || 5043 altspa == spa) 5044 continue; 5045 5046 spa_open_ref(altspa, FTAG); 5047 mutex_exit(&spa_namespace_lock); 5048 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 5049 mutex_enter(&spa_namespace_lock); 5050 spa_close(altspa, FTAG); 5051 } 5052 mutex_exit(&spa_namespace_lock); 5053 5054 /* search the rest of the vdevs for spares to remove */ 5055 spa_vdev_resilver_done(spa); 5056 } 5057 5058 /* all done with the spa; OK to release */ 5059 mutex_enter(&spa_namespace_lock); 5060 spa_close(spa, FTAG); 5061 mutex_exit(&spa_namespace_lock); 5062 5063 return (error); 5064} 5065 5066/* 5067 * Split a set of devices from their mirrors, and create a new pool from them. 5068 */ 5069int 5070spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 5071 nvlist_t *props, boolean_t exp) 5072{ 5073 int error = 0; 5074 uint64_t txg, *glist; 5075 spa_t *newspa; 5076 uint_t c, children, lastlog; 5077 nvlist_t **child, *nvl, *tmp; 5078 dmu_tx_t *tx; 5079 char *altroot = NULL; 5080 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 5081 boolean_t activate_slog; 5082 5083 ASSERT(spa_writeable(spa)); 5084 5085 txg = spa_vdev_enter(spa); 5086 5087 /* clear the log and flush everything up to now */ 5088 activate_slog = spa_passivate_log(spa); 5089 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5090 error = spa_offline_log(spa); 5091 txg = spa_vdev_config_enter(spa); 5092 5093 if (activate_slog) 5094 spa_activate_log(spa); 5095 5096 if (error != 0) 5097 return (spa_vdev_exit(spa, NULL, txg, error)); 5098 5099 /* check new spa name before going any further */ 5100 if (spa_lookup(newname) != NULL) 5101 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 5102 5103 /* 5104 * scan through all the children to ensure they're all mirrors 5105 */ 5106 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 5107 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 5108 &children) != 0) 5109 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5110 5111 /* first, check to ensure we've got the right child count */ 5112 rvd = spa->spa_root_vdev; 5113 lastlog = 0; 5114 for (c = 0; c < rvd->vdev_children; c++) { 5115 vdev_t *vd = rvd->vdev_child[c]; 5116 5117 /* don't count the holes & logs as children */ 5118 if (vd->vdev_islog || vd->vdev_ishole) { 5119 if (lastlog == 0) 5120 lastlog = c; 5121 continue; 5122 } 5123 5124 lastlog = 0; 5125 } 5126 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 5127 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5128 5129 /* next, ensure no spare or cache devices are part of the split */ 5130 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 5131 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 5132 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5133 5134 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 5135 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 5136 5137 /* then, loop over each vdev and validate it */ 5138 for (c = 0; c < children; c++) { 5139 uint64_t is_hole = 0; 5140 5141 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 5142 &is_hole); 5143 5144 if (is_hole != 0) { 5145 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 5146 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 5147 continue; 5148 } else { 5149 error = SET_ERROR(EINVAL); 5150 break; 5151 } 5152 } 5153 5154 /* which disk is going to be split? */ 5155 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 5156 &glist[c]) != 0) { 5157 error = SET_ERROR(EINVAL); 5158 break; 5159 } 5160 5161 /* look it up in the spa */ 5162 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 5163 if (vml[c] == NULL) { 5164 error = SET_ERROR(ENODEV); 5165 break; 5166 } 5167 5168 /* make sure there's nothing stopping the split */ 5169 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 5170 vml[c]->vdev_islog || 5171 vml[c]->vdev_ishole || 5172 vml[c]->vdev_isspare || 5173 vml[c]->vdev_isl2cache || 5174 !vdev_writeable(vml[c]) || 5175 vml[c]->vdev_children != 0 || 5176 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 5177 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 5178 error = SET_ERROR(EINVAL); 5179 break; 5180 } 5181 5182 if (vdev_dtl_required(vml[c])) { 5183 error = SET_ERROR(EBUSY); 5184 break; 5185 } 5186 5187 /* we need certain info from the top level */ 5188 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 5189 vml[c]->vdev_top->vdev_ms_array) == 0); 5190 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 5191 vml[c]->vdev_top->vdev_ms_shift) == 0); 5192 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 5193 vml[c]->vdev_top->vdev_asize) == 0); 5194 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 5195 vml[c]->vdev_top->vdev_ashift) == 0); 5196 } 5197 5198 if (error != 0) { 5199 kmem_free(vml, children * sizeof (vdev_t *)); 5200 kmem_free(glist, children * sizeof (uint64_t)); 5201 return (spa_vdev_exit(spa, NULL, txg, error)); 5202 } 5203 5204 /* stop writers from using the disks */ 5205 for (c = 0; c < children; c++) { 5206 if (vml[c] != NULL) 5207 vml[c]->vdev_offline = B_TRUE; 5208 } 5209 vdev_reopen(spa->spa_root_vdev); 5210 5211 /* 5212 * Temporarily record the splitting vdevs in the spa config. This 5213 * will disappear once the config is regenerated. 5214 */ 5215 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5216 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 5217 glist, children) == 0); 5218 kmem_free(glist, children * sizeof (uint64_t)); 5219 5220 mutex_enter(&spa->spa_props_lock); 5221 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 5222 nvl) == 0); 5223 mutex_exit(&spa->spa_props_lock); 5224 spa->spa_config_splitting = nvl; 5225 vdev_config_dirty(spa->spa_root_vdev); 5226 5227 /* configure and create the new pool */ 5228 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 5229 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 5230 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 5231 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 5232 spa_version(spa)) == 0); 5233 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 5234 spa->spa_config_txg) == 0); 5235 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 5236 spa_generate_guid(NULL)) == 0); 5237 (void) nvlist_lookup_string(props, 5238 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5239 5240 /* add the new pool to the namespace */ 5241 newspa = spa_add(newname, config, altroot); 5242 newspa->spa_config_txg = spa->spa_config_txg; 5243 spa_set_log_state(newspa, SPA_LOG_CLEAR); 5244 5245 /* release the spa config lock, retaining the namespace lock */ 5246 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5247 5248 if (zio_injection_enabled) 5249 zio_handle_panic_injection(spa, FTAG, 1); 5250 5251 spa_activate(newspa, spa_mode_global); 5252 spa_async_suspend(newspa); 5253 5254#ifndef sun 5255 /* mark that we are creating new spa by splitting */ 5256 newspa->spa_splitting_newspa = B_TRUE; 5257#endif 5258 /* create the new pool from the disks of the original pool */ 5259 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); 5260#ifndef sun 5261 newspa->spa_splitting_newspa = B_FALSE; 5262#endif 5263 if (error) 5264 goto out; 5265 5266 /* if that worked, generate a real config for the new pool */ 5267 if (newspa->spa_root_vdev != NULL) { 5268 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 5269 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5270 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 5271 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 5272 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 5273 B_TRUE)); 5274 } 5275 5276 /* set the props */ 5277 if (props != NULL) { 5278 spa_configfile_set(newspa, props, B_FALSE); 5279 error = spa_prop_set(newspa, props); 5280 if (error) 5281 goto out; 5282 } 5283 5284 /* flush everything */ 5285 txg = spa_vdev_config_enter(newspa); 5286 vdev_config_dirty(newspa->spa_root_vdev); 5287 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 5288 5289 if (zio_injection_enabled) 5290 zio_handle_panic_injection(spa, FTAG, 2); 5291 5292 spa_async_resume(newspa); 5293 5294 /* finally, update the original pool's config */ 5295 txg = spa_vdev_config_enter(spa); 5296 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 5297 error = dmu_tx_assign(tx, TXG_WAIT); 5298 if (error != 0) 5299 dmu_tx_abort(tx); 5300 for (c = 0; c < children; c++) { 5301 if (vml[c] != NULL) { 5302 vdev_split(vml[c]); 5303 if (error == 0) 5304 spa_history_log_internal(spa, "detach", tx, 5305 "vdev=%s", vml[c]->vdev_path); 5306 vdev_free(vml[c]); 5307 } 5308 } 5309 vdev_config_dirty(spa->spa_root_vdev); 5310 spa->spa_config_splitting = NULL; 5311 nvlist_free(nvl); 5312 if (error == 0) 5313 dmu_tx_commit(tx); 5314 (void) spa_vdev_exit(spa, NULL, txg, 0); 5315 5316 if (zio_injection_enabled) 5317 zio_handle_panic_injection(spa, FTAG, 3); 5318 5319 /* split is complete; log a history record */ 5320 spa_history_log_internal(newspa, "split", NULL, 5321 "from pool %s", spa_name(spa)); 5322 5323 kmem_free(vml, children * sizeof (vdev_t *)); 5324 5325 /* if we're not going to mount the filesystems in userland, export */ 5326 if (exp) 5327 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 5328 B_FALSE, B_FALSE); 5329 5330 return (error); 5331 5332out: 5333 spa_unload(newspa); 5334 spa_deactivate(newspa); 5335 spa_remove(newspa); 5336 5337 txg = spa_vdev_config_enter(spa); 5338 5339 /* re-online all offlined disks */ 5340 for (c = 0; c < children; c++) { 5341 if (vml[c] != NULL) 5342 vml[c]->vdev_offline = B_FALSE; 5343 } 5344 vdev_reopen(spa->spa_root_vdev); 5345 5346 nvlist_free(spa->spa_config_splitting); 5347 spa->spa_config_splitting = NULL; 5348 (void) spa_vdev_exit(spa, NULL, txg, error); 5349 5350 kmem_free(vml, children * sizeof (vdev_t *)); 5351 return (error); 5352} 5353 5354static nvlist_t * 5355spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) 5356{ 5357 for (int i = 0; i < count; i++) { 5358 uint64_t guid; 5359 5360 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, 5361 &guid) == 0); 5362 5363 if (guid == target_guid) 5364 return (nvpp[i]); 5365 } 5366 5367 return (NULL); 5368} 5369 5370static void 5371spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, 5372 nvlist_t *dev_to_remove) 5373{ 5374 nvlist_t **newdev = NULL; 5375 5376 if (count > 1) 5377 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); 5378 5379 for (int i = 0, j = 0; i < count; i++) { 5380 if (dev[i] == dev_to_remove) 5381 continue; 5382 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); 5383 } 5384 5385 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); 5386 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); 5387 5388 for (int i = 0; i < count - 1; i++) 5389 nvlist_free(newdev[i]); 5390 5391 if (count > 1) 5392 kmem_free(newdev, (count - 1) * sizeof (void *)); 5393} 5394 5395/* 5396 * Evacuate the device. 5397 */ 5398static int 5399spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) 5400{ 5401 uint64_t txg; 5402 int error = 0; 5403 5404 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5405 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5406 ASSERT(vd == vd->vdev_top); 5407 5408 /* 5409 * Evacuate the device. We don't hold the config lock as writer 5410 * since we need to do I/O but we do keep the 5411 * spa_namespace_lock held. Once this completes the device 5412 * should no longer have any blocks allocated on it. 5413 */ 5414 if (vd->vdev_islog) { 5415 if (vd->vdev_stat.vs_alloc != 0) 5416 error = spa_offline_log(spa); 5417 } else { 5418 error = SET_ERROR(ENOTSUP); 5419 } 5420 5421 if (error) 5422 return (error); 5423 5424 /* 5425 * The evacuation succeeded. Remove any remaining MOS metadata 5426 * associated with this vdev, and wait for these changes to sync. 5427 */ 5428 ASSERT0(vd->vdev_stat.vs_alloc); 5429 txg = spa_vdev_config_enter(spa); 5430 vd->vdev_removing = B_TRUE; 5431 vdev_dirty_leaves(vd, VDD_DTL, txg); 5432 vdev_config_dirty(vd); 5433 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5434 5435 return (0); 5436} 5437 5438/* 5439 * Complete the removal by cleaning up the namespace. 5440 */ 5441static void 5442spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd) 5443{ 5444 vdev_t *rvd = spa->spa_root_vdev; 5445 uint64_t id = vd->vdev_id; 5446 boolean_t last_vdev = (id == (rvd->vdev_children - 1)); 5447 5448 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5449 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 5450 ASSERT(vd == vd->vdev_top); 5451 5452 /* 5453 * Only remove any devices which are empty. 5454 */ 5455 if (vd->vdev_stat.vs_alloc != 0) 5456 return; 5457 5458 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 5459 5460 if (list_link_active(&vd->vdev_state_dirty_node)) 5461 vdev_state_clean(vd); 5462 if (list_link_active(&vd->vdev_config_dirty_node)) 5463 vdev_config_clean(vd); 5464 5465 vdev_free(vd); 5466 5467 if (last_vdev) { 5468 vdev_compact_children(rvd); 5469 } else { 5470 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); 5471 vdev_add_child(rvd, vd); 5472 } 5473 vdev_config_dirty(rvd); 5474 5475 /* 5476 * Reassess the health of our root vdev. 5477 */ 5478 vdev_reopen(rvd); 5479} 5480 5481/* 5482 * Remove a device from the pool - 5483 * 5484 * Removing a device from the vdev namespace requires several steps 5485 * and can take a significant amount of time. As a result we use 5486 * the spa_vdev_config_[enter/exit] functions which allow us to 5487 * grab and release the spa_config_lock while still holding the namespace 5488 * lock. During each step the configuration is synced out. 5489 * 5490 * Currently, this supports removing only hot spares, slogs, and level 2 ARC 5491 * devices. 5492 */ 5493int 5494spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) 5495{ 5496 vdev_t *vd; 5497 metaslab_group_t *mg; 5498 nvlist_t **spares, **l2cache, *nv; 5499 uint64_t txg = 0; 5500 uint_t nspares, nl2cache; 5501 int error = 0; 5502 boolean_t locked = MUTEX_HELD(&spa_namespace_lock); 5503 5504 ASSERT(spa_writeable(spa)); 5505 5506 if (!locked) 5507 txg = spa_vdev_enter(spa); 5508 5509 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 5510 5511 if (spa->spa_spares.sav_vdevs != NULL && 5512 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 5513 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && 5514 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { 5515 /* 5516 * Only remove the hot spare if it's not currently in use 5517 * in this pool. 5518 */ 5519 if (vd == NULL || unspare) { 5520 spa_vdev_remove_aux(spa->spa_spares.sav_config, 5521 ZPOOL_CONFIG_SPARES, spares, nspares, nv); 5522 spa_load_spares(spa); 5523 spa->spa_spares.sav_sync = B_TRUE; 5524 } else { 5525 error = SET_ERROR(EBUSY); 5526 } 5527 } else if (spa->spa_l2cache.sav_vdevs != NULL && 5528 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 5529 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && 5530 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { 5531 /* 5532 * Cache devices can always be removed. 5533 */ 5534 spa_vdev_remove_aux(spa->spa_l2cache.sav_config, 5535 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); 5536 spa_load_l2cache(spa); 5537 spa->spa_l2cache.sav_sync = B_TRUE; 5538 } else if (vd != NULL && vd->vdev_islog) { 5539 ASSERT(!locked); 5540 ASSERT(vd == vd->vdev_top); 5541 5542 /* 5543 * XXX - Once we have bp-rewrite this should 5544 * become the common case. 5545 */ 5546 5547 mg = vd->vdev_mg; 5548 5549 /* 5550 * Stop allocating from this vdev. 5551 */ 5552 metaslab_group_passivate(mg); 5553 5554 /* 5555 * Wait for the youngest allocations and frees to sync, 5556 * and then wait for the deferral of those frees to finish. 5557 */ 5558 spa_vdev_config_exit(spa, NULL, 5559 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); 5560 5561 /* 5562 * Attempt to evacuate the vdev. 5563 */ 5564 error = spa_vdev_remove_evacuate(spa, vd); 5565 5566 txg = spa_vdev_config_enter(spa); 5567 5568 /* 5569 * If we couldn't evacuate the vdev, unwind. 5570 */ 5571 if (error) { 5572 metaslab_group_activate(mg); 5573 return (spa_vdev_exit(spa, NULL, txg, error)); 5574 } 5575 5576 /* 5577 * Clean up the vdev namespace. 5578 */ 5579 spa_vdev_remove_from_namespace(spa, vd); 5580 5581 } else if (vd != NULL) { 5582 /* 5583 * Normal vdevs cannot be removed (yet). 5584 */ 5585 error = SET_ERROR(ENOTSUP); 5586 } else { 5587 /* 5588 * There is no vdev of any kind with the specified guid. 5589 */ 5590 error = SET_ERROR(ENOENT); 5591 } 5592 5593 if (!locked) 5594 return (spa_vdev_exit(spa, NULL, txg, error)); 5595 5596 return (error); 5597} 5598 5599/* 5600 * Find any device that's done replacing, or a vdev marked 'unspare' that's 5601 * currently spared, so we can detach it. 5602 */ 5603static vdev_t * 5604spa_vdev_resilver_done_hunt(vdev_t *vd) 5605{ 5606 vdev_t *newvd, *oldvd; 5607 5608 for (int c = 0; c < vd->vdev_children; c++) { 5609 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 5610 if (oldvd != NULL) 5611 return (oldvd); 5612 } 5613 5614 /* 5615 * Check for a completed replacement. We always consider the first 5616 * vdev in the list to be the oldest vdev, and the last one to be 5617 * the newest (see spa_vdev_attach() for how that works). In 5618 * the case where the newest vdev is faulted, we will not automatically 5619 * remove it after a resilver completes. This is OK as it will require 5620 * user intervention to determine which disk the admin wishes to keep. 5621 */ 5622 if (vd->vdev_ops == &vdev_replacing_ops) { 5623 ASSERT(vd->vdev_children > 1); 5624 5625 newvd = vd->vdev_child[vd->vdev_children - 1]; 5626 oldvd = vd->vdev_child[0]; 5627 5628 if (vdev_dtl_empty(newvd, DTL_MISSING) && 5629 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5630 !vdev_dtl_required(oldvd)) 5631 return (oldvd); 5632 } 5633 5634 /* 5635 * Check for a completed resilver with the 'unspare' flag set. 5636 */ 5637 if (vd->vdev_ops == &vdev_spare_ops) { 5638 vdev_t *first = vd->vdev_child[0]; 5639 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 5640 5641 if (last->vdev_unspare) { 5642 oldvd = first; 5643 newvd = last; 5644 } else if (first->vdev_unspare) { 5645 oldvd = last; 5646 newvd = first; 5647 } else { 5648 oldvd = NULL; 5649 } 5650 5651 if (oldvd != NULL && 5652 vdev_dtl_empty(newvd, DTL_MISSING) && 5653 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5654 !vdev_dtl_required(oldvd)) 5655 return (oldvd); 5656 5657 /* 5658 * If there are more than two spares attached to a disk, 5659 * and those spares are not required, then we want to 5660 * attempt to free them up now so that they can be used 5661 * by other pools. Once we're back down to a single 5662 * disk+spare, we stop removing them. 5663 */ 5664 if (vd->vdev_children > 2) { 5665 newvd = vd->vdev_child[1]; 5666 5667 if (newvd->vdev_isspare && last->vdev_isspare && 5668 vdev_dtl_empty(last, DTL_MISSING) && 5669 vdev_dtl_empty(last, DTL_OUTAGE) && 5670 !vdev_dtl_required(newvd)) 5671 return (newvd); 5672 } 5673 } 5674 5675 return (NULL); 5676} 5677 5678static void 5679spa_vdev_resilver_done(spa_t *spa) 5680{ 5681 vdev_t *vd, *pvd, *ppvd; 5682 uint64_t guid, sguid, pguid, ppguid; 5683 5684 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5685 5686 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 5687 pvd = vd->vdev_parent; 5688 ppvd = pvd->vdev_parent; 5689 guid = vd->vdev_guid; 5690 pguid = pvd->vdev_guid; 5691 ppguid = ppvd->vdev_guid; 5692 sguid = 0; 5693 /* 5694 * If we have just finished replacing a hot spared device, then 5695 * we need to detach the parent's first child (the original hot 5696 * spare) as well. 5697 */ 5698 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 5699 ppvd->vdev_children == 2) { 5700 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 5701 sguid = ppvd->vdev_child[1]->vdev_guid; 5702 } 5703 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); 5704 5705 spa_config_exit(spa, SCL_ALL, FTAG); 5706 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 5707 return; 5708 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 5709 return; 5710 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5711 } 5712 5713 spa_config_exit(spa, SCL_ALL, FTAG); 5714} 5715 5716/* 5717 * Update the stored path or FRU for this vdev. 5718 */ 5719int 5720spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 5721 boolean_t ispath) 5722{ 5723 vdev_t *vd; 5724 boolean_t sync = B_FALSE; 5725 5726 ASSERT(spa_writeable(spa)); 5727 5728 spa_vdev_state_enter(spa, SCL_ALL); 5729 5730 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 5731 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 5732 5733 if (!vd->vdev_ops->vdev_op_leaf) 5734 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 5735 5736 if (ispath) { 5737 if (strcmp(value, vd->vdev_path) != 0) { 5738 spa_strfree(vd->vdev_path); 5739 vd->vdev_path = spa_strdup(value); 5740 sync = B_TRUE; 5741 } 5742 } else { 5743 if (vd->vdev_fru == NULL) { 5744 vd->vdev_fru = spa_strdup(value); 5745 sync = B_TRUE; 5746 } else if (strcmp(value, vd->vdev_fru) != 0) { 5747 spa_strfree(vd->vdev_fru); 5748 vd->vdev_fru = spa_strdup(value); 5749 sync = B_TRUE; 5750 } 5751 } 5752 5753 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 5754} 5755 5756int 5757spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 5758{ 5759 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 5760} 5761 5762int 5763spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 5764{ 5765 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 5766} 5767 5768/* 5769 * ========================================================================== 5770 * SPA Scanning 5771 * ========================================================================== 5772 */ 5773 5774int 5775spa_scan_stop(spa_t *spa) 5776{ 5777 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5778 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 5779 return (SET_ERROR(EBUSY)); 5780 return (dsl_scan_cancel(spa->spa_dsl_pool)); 5781} 5782 5783int 5784spa_scan(spa_t *spa, pool_scan_func_t func) 5785{ 5786 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5787 5788 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 5789 return (SET_ERROR(ENOTSUP)); 5790 5791 /* 5792 * If a resilver was requested, but there is no DTL on a 5793 * writeable leaf device, we have nothing to do. 5794 */ 5795 if (func == POOL_SCAN_RESILVER && 5796 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 5797 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 5798 return (0); 5799 } 5800 5801 return (dsl_scan(spa->spa_dsl_pool, func)); 5802} 5803 5804/* 5805 * ========================================================================== 5806 * SPA async task processing 5807 * ========================================================================== 5808 */ 5809 5810static void 5811spa_async_remove(spa_t *spa, vdev_t *vd) 5812{ 5813 if (vd->vdev_remove_wanted) { 5814 vd->vdev_remove_wanted = B_FALSE; 5815 vd->vdev_delayed_close = B_FALSE; 5816 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 5817 5818 /* 5819 * We want to clear the stats, but we don't want to do a full 5820 * vdev_clear() as that will cause us to throw away 5821 * degraded/faulted state as well as attempt to reopen the 5822 * device, all of which is a waste. 5823 */ 5824 vd->vdev_stat.vs_read_errors = 0; 5825 vd->vdev_stat.vs_write_errors = 0; 5826 vd->vdev_stat.vs_checksum_errors = 0; 5827 5828 vdev_state_dirty(vd->vdev_top); 5829 } 5830 5831 for (int c = 0; c < vd->vdev_children; c++) 5832 spa_async_remove(spa, vd->vdev_child[c]); 5833} 5834 5835static void 5836spa_async_probe(spa_t *spa, vdev_t *vd) 5837{ 5838 if (vd->vdev_probe_wanted) { 5839 vd->vdev_probe_wanted = B_FALSE; 5840 vdev_reopen(vd); /* vdev_open() does the actual probe */ 5841 } 5842 5843 for (int c = 0; c < vd->vdev_children; c++) 5844 spa_async_probe(spa, vd->vdev_child[c]); 5845} 5846 5847static void 5848spa_async_autoexpand(spa_t *spa, vdev_t *vd) 5849{ 5850 sysevent_id_t eid; 5851 nvlist_t *attr; 5852 char *physpath; 5853 5854 if (!spa->spa_autoexpand) 5855 return; 5856 5857 for (int c = 0; c < vd->vdev_children; c++) { 5858 vdev_t *cvd = vd->vdev_child[c]; 5859 spa_async_autoexpand(spa, cvd); 5860 } 5861 5862 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 5863 return; 5864 5865 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 5866 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 5867 5868 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5869 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); 5870 5871 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, 5872 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP); 5873 5874 nvlist_free(attr); 5875 kmem_free(physpath, MAXPATHLEN); 5876} 5877 5878static void 5879spa_async_thread(void *arg) 5880{ 5881 spa_t *spa = arg; 5882 int tasks; 5883 5884 ASSERT(spa->spa_sync_on); 5885 5886 mutex_enter(&spa->spa_async_lock); 5887 tasks = spa->spa_async_tasks; 5888 spa->spa_async_tasks &= SPA_ASYNC_REMOVE; 5889 mutex_exit(&spa->spa_async_lock); 5890 5891 /* 5892 * See if the config needs to be updated. 5893 */ 5894 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 5895 uint64_t old_space, new_space; 5896 5897 mutex_enter(&spa_namespace_lock); 5898 old_space = metaslab_class_get_space(spa_normal_class(spa)); 5899 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5900 new_space = metaslab_class_get_space(spa_normal_class(spa)); 5901 mutex_exit(&spa_namespace_lock); 5902 5903 /* 5904 * If the pool grew as a result of the config update, 5905 * then log an internal history event. 5906 */ 5907 if (new_space != old_space) { 5908 spa_history_log_internal(spa, "vdev online", NULL, 5909 "pool '%s' size: %llu(+%llu)", 5910 spa_name(spa), new_space, new_space - old_space); 5911 } 5912 } 5913 5914 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 5915 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5916 spa_async_autoexpand(spa, spa->spa_root_vdev); 5917 spa_config_exit(spa, SCL_CONFIG, FTAG); 5918 } 5919 5920 /* 5921 * See if any devices need to be probed. 5922 */ 5923 if (tasks & SPA_ASYNC_PROBE) { 5924 spa_vdev_state_enter(spa, SCL_NONE); 5925 spa_async_probe(spa, spa->spa_root_vdev); 5926 (void) spa_vdev_state_exit(spa, NULL, 0); 5927 } 5928 5929 /* 5930 * If any devices are done replacing, detach them. 5931 */ 5932 if (tasks & SPA_ASYNC_RESILVER_DONE) 5933 spa_vdev_resilver_done(spa); 5934 5935 /* 5936 * Kick off a resilver. 5937 */ 5938 if (tasks & SPA_ASYNC_RESILVER) 5939 dsl_resilver_restart(spa->spa_dsl_pool, 0); 5940 5941 /* 5942 * Let the world know that we're done. 5943 */ 5944 mutex_enter(&spa->spa_async_lock); 5945 spa->spa_async_thread = NULL; 5946 cv_broadcast(&spa->spa_async_cv); 5947 mutex_exit(&spa->spa_async_lock); 5948 thread_exit(); 5949} 5950 5951static void 5952spa_async_thread_vd(void *arg) 5953{ 5954 spa_t *spa = arg; 5955 int tasks; 5956 5957 ASSERT(spa->spa_sync_on); 5958 5959 mutex_enter(&spa->spa_async_lock); 5960 tasks = spa->spa_async_tasks; 5961retry: 5962 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE; 5963 mutex_exit(&spa->spa_async_lock); 5964 5965 /* 5966 * See if any devices need to be marked REMOVED. 5967 */ 5968 if (tasks & SPA_ASYNC_REMOVE) { 5969 spa_vdev_state_enter(spa, SCL_NONE); 5970 spa_async_remove(spa, spa->spa_root_vdev); 5971 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 5972 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 5973 for (int i = 0; i < spa->spa_spares.sav_count; i++) 5974 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 5975 (void) spa_vdev_state_exit(spa, NULL, 0); 5976 } 5977 5978 /* 5979 * Let the world know that we're done. 5980 */ 5981 mutex_enter(&spa->spa_async_lock); 5982 tasks = spa->spa_async_tasks; 5983 if ((tasks & SPA_ASYNC_REMOVE) != 0) 5984 goto retry; 5985 spa->spa_async_thread_vd = NULL; 5986 cv_broadcast(&spa->spa_async_cv); 5987 mutex_exit(&spa->spa_async_lock); 5988 thread_exit(); 5989} 5990 5991void 5992spa_async_suspend(spa_t *spa) 5993{ 5994 mutex_enter(&spa->spa_async_lock); 5995 spa->spa_async_suspended++; 5996 while (spa->spa_async_thread != NULL && 5997 spa->spa_async_thread_vd != NULL) 5998 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 5999 mutex_exit(&spa->spa_async_lock); 6000} 6001 6002void 6003spa_async_resume(spa_t *spa) 6004{ 6005 mutex_enter(&spa->spa_async_lock); 6006 ASSERT(spa->spa_async_suspended != 0); 6007 spa->spa_async_suspended--; 6008 mutex_exit(&spa->spa_async_lock); 6009} 6010 6011static boolean_t 6012spa_async_tasks_pending(spa_t *spa) 6013{ 6014 uint_t non_config_tasks; 6015 uint_t config_task; 6016 boolean_t config_task_suspended; 6017 6018 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE | 6019 SPA_ASYNC_REMOVE); 6020 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; 6021 if (spa->spa_ccw_fail_time == 0) { 6022 config_task_suspended = B_FALSE; 6023 } else { 6024 config_task_suspended = 6025 (gethrtime() - spa->spa_ccw_fail_time) < 6026 (zfs_ccw_retry_interval * NANOSEC); 6027 } 6028 6029 return (non_config_tasks || (config_task && !config_task_suspended)); 6030} 6031 6032static void 6033spa_async_dispatch(spa_t *spa) 6034{ 6035 mutex_enter(&spa->spa_async_lock); 6036 if (spa_async_tasks_pending(spa) && 6037 !spa->spa_async_suspended && 6038 spa->spa_async_thread == NULL && 6039 rootdir != NULL) 6040 spa->spa_async_thread = thread_create(NULL, 0, 6041 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 6042 mutex_exit(&spa->spa_async_lock); 6043} 6044 6045static void 6046spa_async_dispatch_vd(spa_t *spa) 6047{ 6048 mutex_enter(&spa->spa_async_lock); 6049 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 && 6050 !spa->spa_async_suspended && 6051 spa->spa_async_thread_vd == NULL && 6052 rootdir != NULL) 6053 spa->spa_async_thread_vd = thread_create(NULL, 0, 6054 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri); 6055 mutex_exit(&spa->spa_async_lock); 6056} 6057 6058void 6059spa_async_request(spa_t *spa, int task) 6060{ 6061 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 6062 mutex_enter(&spa->spa_async_lock); 6063 spa->spa_async_tasks |= task; 6064 mutex_exit(&spa->spa_async_lock); 6065 spa_async_dispatch_vd(spa); 6066} 6067 6068/* 6069 * ========================================================================== 6070 * SPA syncing routines 6071 * ========================================================================== 6072 */ 6073 6074static int 6075bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6076{ 6077 bpobj_t *bpo = arg; 6078 bpobj_enqueue(bpo, bp, tx); 6079 return (0); 6080} 6081 6082static int 6083spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6084{ 6085 zio_t *zio = arg; 6086 6087 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 6088 BP_GET_PSIZE(bp), zio->io_flags)); 6089 return (0); 6090} 6091 6092/* 6093 * Note: this simple function is not inlined to make it easier to dtrace the 6094 * amount of time spent syncing frees. 6095 */ 6096static void 6097spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) 6098{ 6099 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6100 bplist_iterate(bpl, spa_free_sync_cb, zio, tx); 6101 VERIFY(zio_wait(zio) == 0); 6102} 6103 6104/* 6105 * Note: this simple function is not inlined to make it easier to dtrace the 6106 * amount of time spent syncing deferred frees. 6107 */ 6108static void 6109spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) 6110{ 6111 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6112 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, 6113 spa_free_sync_cb, zio, tx), ==, 0); 6114 VERIFY0(zio_wait(zio)); 6115} 6116 6117 6118static void 6119spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 6120{ 6121 char *packed = NULL; 6122 size_t bufsize; 6123 size_t nvsize = 0; 6124 dmu_buf_t *db; 6125 6126 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 6127 6128 /* 6129 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 6130 * information. This avoids the dmu_buf_will_dirty() path and 6131 * saves us a pre-read to get data we don't actually care about. 6132 */ 6133 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 6134 packed = kmem_alloc(bufsize, KM_SLEEP); 6135 6136 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 6137 KM_SLEEP) == 0); 6138 bzero(packed + nvsize, bufsize - nvsize); 6139 6140 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 6141 6142 kmem_free(packed, bufsize); 6143 6144 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 6145 dmu_buf_will_dirty(db, tx); 6146 *(uint64_t *)db->db_data = nvsize; 6147 dmu_buf_rele(db, FTAG); 6148} 6149 6150static void 6151spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 6152 const char *config, const char *entry) 6153{ 6154 nvlist_t *nvroot; 6155 nvlist_t **list; 6156 int i; 6157 6158 if (!sav->sav_sync) 6159 return; 6160 6161 /* 6162 * Update the MOS nvlist describing the list of available devices. 6163 * spa_validate_aux() will have already made sure this nvlist is 6164 * valid and the vdevs are labeled appropriately. 6165 */ 6166 if (sav->sav_object == 0) { 6167 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 6168 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 6169 sizeof (uint64_t), tx); 6170 VERIFY(zap_update(spa->spa_meta_objset, 6171 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 6172 &sav->sav_object, tx) == 0); 6173 } 6174 6175 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 6176 if (sav->sav_count == 0) { 6177 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 6178 } else { 6179 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 6180 for (i = 0; i < sav->sav_count; i++) 6181 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 6182 B_FALSE, VDEV_CONFIG_L2CACHE); 6183 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 6184 sav->sav_count) == 0); 6185 for (i = 0; i < sav->sav_count; i++) 6186 nvlist_free(list[i]); 6187 kmem_free(list, sav->sav_count * sizeof (void *)); 6188 } 6189 6190 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 6191 nvlist_free(nvroot); 6192 6193 sav->sav_sync = B_FALSE; 6194} 6195 6196static void 6197spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 6198{ 6199 nvlist_t *config; 6200 6201 if (list_is_empty(&spa->spa_config_dirty_list)) 6202 return; 6203 6204 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6205 6206 config = spa_config_generate(spa, spa->spa_root_vdev, 6207 dmu_tx_get_txg(tx), B_FALSE); 6208 6209 /* 6210 * If we're upgrading the spa version then make sure that 6211 * the config object gets updated with the correct version. 6212 */ 6213 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) 6214 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 6215 spa->spa_uberblock.ub_version); 6216 6217 spa_config_exit(spa, SCL_STATE, FTAG); 6218 6219 if (spa->spa_config_syncing) 6220 nvlist_free(spa->spa_config_syncing); 6221 spa->spa_config_syncing = config; 6222 6223 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 6224} 6225 6226static void 6227spa_sync_version(void *arg, dmu_tx_t *tx) 6228{ 6229 uint64_t *versionp = arg; 6230 uint64_t version = *versionp; 6231 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6232 6233 /* 6234 * Setting the version is special cased when first creating the pool. 6235 */ 6236 ASSERT(tx->tx_txg != TXG_INITIAL); 6237 6238 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 6239 ASSERT(version >= spa_version(spa)); 6240 6241 spa->spa_uberblock.ub_version = version; 6242 vdev_config_dirty(spa->spa_root_vdev); 6243 spa_history_log_internal(spa, "set", tx, "version=%lld", version); 6244} 6245 6246/* 6247 * Set zpool properties. 6248 */ 6249static void 6250spa_sync_props(void *arg, dmu_tx_t *tx) 6251{ 6252 nvlist_t *nvp = arg; 6253 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6254 objset_t *mos = spa->spa_meta_objset; 6255 nvpair_t *elem = NULL; 6256 6257 mutex_enter(&spa->spa_props_lock); 6258 6259 while ((elem = nvlist_next_nvpair(nvp, elem))) { 6260 uint64_t intval; 6261 char *strval, *fname; 6262 zpool_prop_t prop; 6263 const char *propname; 6264 zprop_type_t proptype; 6265 spa_feature_t fid; 6266 6267 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 6268 case ZPROP_INVAL: 6269 /* 6270 * We checked this earlier in spa_prop_validate(). 6271 */ 6272 ASSERT(zpool_prop_feature(nvpair_name(elem))); 6273 6274 fname = strchr(nvpair_name(elem), '@') + 1; 6275 VERIFY0(zfeature_lookup_name(fname, &fid)); 6276 6277 spa_feature_enable(spa, fid, tx); 6278 spa_history_log_internal(spa, "set", tx, 6279 "%s=enabled", nvpair_name(elem)); 6280 break; 6281 6282 case ZPOOL_PROP_VERSION: 6283 intval = fnvpair_value_uint64(elem); 6284 /* 6285 * The version is synced seperatly before other 6286 * properties and should be correct by now. 6287 */ 6288 ASSERT3U(spa_version(spa), >=, intval); 6289 break; 6290 6291 case ZPOOL_PROP_ALTROOT: 6292 /* 6293 * 'altroot' is a non-persistent property. It should 6294 * have been set temporarily at creation or import time. 6295 */ 6296 ASSERT(spa->spa_root != NULL); 6297 break; 6298 6299 case ZPOOL_PROP_READONLY: 6300 case ZPOOL_PROP_CACHEFILE: 6301 /* 6302 * 'readonly' and 'cachefile' are also non-persisitent 6303 * properties. 6304 */ 6305 break; 6306 case ZPOOL_PROP_COMMENT: 6307 strval = fnvpair_value_string(elem); 6308 if (spa->spa_comment != NULL) 6309 spa_strfree(spa->spa_comment); 6310 spa->spa_comment = spa_strdup(strval); 6311 /* 6312 * We need to dirty the configuration on all the vdevs 6313 * so that their labels get updated. It's unnecessary 6314 * to do this for pool creation since the vdev's 6315 * configuratoin has already been dirtied. 6316 */ 6317 if (tx->tx_txg != TXG_INITIAL) 6318 vdev_config_dirty(spa->spa_root_vdev); 6319 spa_history_log_internal(spa, "set", tx, 6320 "%s=%s", nvpair_name(elem), strval); 6321 break; 6322 default: 6323 /* 6324 * Set pool property values in the poolprops mos object. 6325 */ 6326 if (spa->spa_pool_props_object == 0) { 6327 spa->spa_pool_props_object = 6328 zap_create_link(mos, DMU_OT_POOL_PROPS, 6329 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 6330 tx); 6331 } 6332 6333 /* normalize the property name */ 6334 propname = zpool_prop_to_name(prop); 6335 proptype = zpool_prop_get_type(prop); 6336 6337 if (nvpair_type(elem) == DATA_TYPE_STRING) { 6338 ASSERT(proptype == PROP_TYPE_STRING); 6339 strval = fnvpair_value_string(elem); 6340 VERIFY0(zap_update(mos, 6341 spa->spa_pool_props_object, propname, 6342 1, strlen(strval) + 1, strval, tx)); 6343 spa_history_log_internal(spa, "set", tx, 6344 "%s=%s", nvpair_name(elem), strval); 6345 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 6346 intval = fnvpair_value_uint64(elem); 6347 6348 if (proptype == PROP_TYPE_INDEX) { 6349 const char *unused; 6350 VERIFY0(zpool_prop_index_to_string( 6351 prop, intval, &unused)); 6352 } 6353 VERIFY0(zap_update(mos, 6354 spa->spa_pool_props_object, propname, 6355 8, 1, &intval, tx)); 6356 spa_history_log_internal(spa, "set", tx, 6357 "%s=%lld", nvpair_name(elem), intval); 6358 } else { 6359 ASSERT(0); /* not allowed */ 6360 } 6361 6362 switch (prop) { 6363 case ZPOOL_PROP_DELEGATION: 6364 spa->spa_delegation = intval; 6365 break; 6366 case ZPOOL_PROP_BOOTFS: 6367 spa->spa_bootfs = intval; 6368 break; 6369 case ZPOOL_PROP_FAILUREMODE: 6370 spa->spa_failmode = intval; 6371 break; 6372 case ZPOOL_PROP_AUTOEXPAND: 6373 spa->spa_autoexpand = intval; 6374 if (tx->tx_txg != TXG_INITIAL) 6375 spa_async_request(spa, 6376 SPA_ASYNC_AUTOEXPAND); 6377 break; 6378 case ZPOOL_PROP_DEDUPDITTO: 6379 spa->spa_dedup_ditto = intval; 6380 break; 6381 default: 6382 break; 6383 } 6384 } 6385 6386 } 6387 6388 mutex_exit(&spa->spa_props_lock); 6389} 6390 6391/* 6392 * Perform one-time upgrade on-disk changes. spa_version() does not 6393 * reflect the new version this txg, so there must be no changes this 6394 * txg to anything that the upgrade code depends on after it executes. 6395 * Therefore this must be called after dsl_pool_sync() does the sync 6396 * tasks. 6397 */ 6398static void 6399spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 6400{ 6401 dsl_pool_t *dp = spa->spa_dsl_pool; 6402 6403 ASSERT(spa->spa_sync_pass == 1); 6404 6405 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); 6406 6407 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 6408 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 6409 dsl_pool_create_origin(dp, tx); 6410 6411 /* Keeping the origin open increases spa_minref */ 6412 spa->spa_minref += 3; 6413 } 6414 6415 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 6416 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 6417 dsl_pool_upgrade_clones(dp, tx); 6418 } 6419 6420 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 6421 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 6422 dsl_pool_upgrade_dir_clones(dp, tx); 6423 6424 /* Keeping the freedir open increases spa_minref */ 6425 spa->spa_minref += 3; 6426 } 6427 6428 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 6429 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6430 spa_feature_create_zap_objects(spa, tx); 6431 } 6432 rrw_exit(&dp->dp_config_rwlock, FTAG); 6433} 6434 6435/* 6436 * Sync the specified transaction group. New blocks may be dirtied as 6437 * part of the process, so we iterate until it converges. 6438 */ 6439void 6440spa_sync(spa_t *spa, uint64_t txg) 6441{ 6442 dsl_pool_t *dp = spa->spa_dsl_pool; 6443 objset_t *mos = spa->spa_meta_objset; 6444 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 6445 vdev_t *rvd = spa->spa_root_vdev; 6446 vdev_t *vd; 6447 dmu_tx_t *tx; 6448 int error; 6449 6450 VERIFY(spa_writeable(spa)); 6451 6452 /* 6453 * Lock out configuration changes. 6454 */ 6455 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 6456 6457 spa->spa_syncing_txg = txg; 6458 spa->spa_sync_pass = 0; 6459 6460 /* 6461 * If there are any pending vdev state changes, convert them 6462 * into config changes that go out with this transaction group. 6463 */ 6464 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6465 while (list_head(&spa->spa_state_dirty_list) != NULL) { 6466 /* 6467 * We need the write lock here because, for aux vdevs, 6468 * calling vdev_config_dirty() modifies sav_config. 6469 * This is ugly and will become unnecessary when we 6470 * eliminate the aux vdev wart by integrating all vdevs 6471 * into the root vdev tree. 6472 */ 6473 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6474 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 6475 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 6476 vdev_state_clean(vd); 6477 vdev_config_dirty(vd); 6478 } 6479 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6480 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6481 } 6482 spa_config_exit(spa, SCL_STATE, FTAG); 6483 6484 tx = dmu_tx_create_assigned(dp, txg); 6485 6486 spa->spa_sync_starttime = gethrtime(); 6487#ifdef illumos 6488 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, 6489 spa->spa_sync_starttime + spa->spa_deadman_synctime)); 6490#else /* FreeBSD */ 6491#ifdef _KERNEL 6492 callout_reset(&spa->spa_deadman_cycid, 6493 hz * spa->spa_deadman_synctime / NANOSEC, spa_deadman, spa); 6494#endif 6495#endif 6496 6497 /* 6498 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 6499 * set spa_deflate if we have no raid-z vdevs. 6500 */ 6501 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 6502 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 6503 int i; 6504 6505 for (i = 0; i < rvd->vdev_children; i++) { 6506 vd = rvd->vdev_child[i]; 6507 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 6508 break; 6509 } 6510 if (i == rvd->vdev_children) { 6511 spa->spa_deflate = TRUE; 6512 VERIFY(0 == zap_add(spa->spa_meta_objset, 6513 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 6514 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 6515 } 6516 } 6517 6518 /* 6519 * If anything has changed in this txg, or if someone is waiting 6520 * for this txg to sync (eg, spa_vdev_remove()), push the 6521 * deferred frees from the previous txg. If not, leave them 6522 * alone so that we don't generate work on an otherwise idle 6523 * system. 6524 */ 6525 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || 6526 !txg_list_empty(&dp->dp_dirty_dirs, txg) || 6527 !txg_list_empty(&dp->dp_sync_tasks, txg) || 6528 ((dsl_scan_active(dp->dp_scan) || 6529 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) { 6530 spa_sync_deferred_frees(spa, tx); 6531 } 6532 6533 /* 6534 * Iterate to convergence. 6535 */ 6536 do { 6537 int pass = ++spa->spa_sync_pass; 6538 6539 spa_sync_config_object(spa, tx); 6540 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 6541 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 6542 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 6543 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 6544 spa_errlog_sync(spa, txg); 6545 dsl_pool_sync(dp, txg); 6546 6547 if (pass < zfs_sync_pass_deferred_free) { 6548 spa_sync_frees(spa, free_bpl, tx); 6549 } else { 6550 bplist_iterate(free_bpl, bpobj_enqueue_cb, 6551 &spa->spa_deferred_bpobj, tx); 6552 } 6553 6554 ddt_sync(spa, txg); 6555 dsl_scan_sync(dp, tx); 6556 6557 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 6558 vdev_sync(vd, txg); 6559 6560 if (pass == 1) 6561 spa_sync_upgrades(spa, tx); 6562 6563 } while (dmu_objset_is_dirty(mos, txg)); 6564 6565 /* 6566 * Rewrite the vdev configuration (which includes the uberblock) 6567 * to commit the transaction group. 6568 * 6569 * If there are no dirty vdevs, we sync the uberblock to a few 6570 * random top-level vdevs that are known to be visible in the 6571 * config cache (see spa_vdev_add() for a complete description). 6572 * If there *are* dirty vdevs, sync the uberblock to all vdevs. 6573 */ 6574 for (;;) { 6575 /* 6576 * We hold SCL_STATE to prevent vdev open/close/etc. 6577 * while we're attempting to write the vdev labels. 6578 */ 6579 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6580 6581 if (list_is_empty(&spa->spa_config_dirty_list)) { 6582 vdev_t *svd[SPA_DVAS_PER_BP]; 6583 int svdcount = 0; 6584 int children = rvd->vdev_children; 6585 int c0 = spa_get_random(children); 6586 6587 for (int c = 0; c < children; c++) { 6588 vd = rvd->vdev_child[(c0 + c) % children]; 6589 if (vd->vdev_ms_array == 0 || vd->vdev_islog) 6590 continue; 6591 svd[svdcount++] = vd; 6592 if (svdcount == SPA_DVAS_PER_BP) 6593 break; 6594 } 6595 error = vdev_config_sync(svd, svdcount, txg, B_FALSE); 6596 if (error != 0) 6597 error = vdev_config_sync(svd, svdcount, txg, 6598 B_TRUE); 6599 } else { 6600 error = vdev_config_sync(rvd->vdev_child, 6601 rvd->vdev_children, txg, B_FALSE); 6602 if (error != 0) 6603 error = vdev_config_sync(rvd->vdev_child, 6604 rvd->vdev_children, txg, B_TRUE); 6605 } 6606 6607 if (error == 0) 6608 spa->spa_last_synced_guid = rvd->vdev_guid; 6609 6610 spa_config_exit(spa, SCL_STATE, FTAG); 6611 6612 if (error == 0) 6613 break; 6614 zio_suspend(spa, NULL); 6615 zio_resume_wait(spa); 6616 } 6617 dmu_tx_commit(tx); 6618 6619#ifdef illumos 6620 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 6621#else /* FreeBSD */ 6622#ifdef _KERNEL 6623 callout_drain(&spa->spa_deadman_cycid); 6624#endif 6625#endif 6626 6627 /* 6628 * Clear the dirty config list. 6629 */ 6630 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 6631 vdev_config_clean(vd); 6632 6633 /* 6634 * Now that the new config has synced transactionally, 6635 * let it become visible to the config cache. 6636 */ 6637 if (spa->spa_config_syncing != NULL) { 6638 spa_config_set(spa, spa->spa_config_syncing); 6639 spa->spa_config_txg = txg; 6640 spa->spa_config_syncing = NULL; 6641 } 6642 6643 spa->spa_ubsync = spa->spa_uberblock; 6644 6645 dsl_pool_sync_done(dp, txg); 6646 6647 /* 6648 * Update usable space statistics. 6649 */ 6650 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 6651 vdev_sync_done(vd, txg); 6652 6653 spa_update_dspace(spa); 6654 6655 /* 6656 * It had better be the case that we didn't dirty anything 6657 * since vdev_config_sync(). 6658 */ 6659 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 6660 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 6661 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 6662 6663 spa->spa_sync_pass = 0; 6664 6665 spa_config_exit(spa, SCL_CONFIG, FTAG); 6666 6667 spa_handle_ignored_writes(spa); 6668 6669 /* 6670 * If any async tasks have been requested, kick them off. 6671 */ 6672 spa_async_dispatch(spa); 6673 spa_async_dispatch_vd(spa); 6674} 6675 6676/* 6677 * Sync all pools. We don't want to hold the namespace lock across these 6678 * operations, so we take a reference on the spa_t and drop the lock during the 6679 * sync. 6680 */ 6681void 6682spa_sync_allpools(void) 6683{ 6684 spa_t *spa = NULL; 6685 mutex_enter(&spa_namespace_lock); 6686 while ((spa = spa_next(spa)) != NULL) { 6687 if (spa_state(spa) != POOL_STATE_ACTIVE || 6688 !spa_writeable(spa) || spa_suspended(spa)) 6689 continue; 6690 spa_open_ref(spa, FTAG); 6691 mutex_exit(&spa_namespace_lock); 6692 txg_wait_synced(spa_get_dsl(spa), 0); 6693 mutex_enter(&spa_namespace_lock); 6694 spa_close(spa, FTAG); 6695 } 6696 mutex_exit(&spa_namespace_lock); 6697} 6698 6699/* 6700 * ========================================================================== 6701 * Miscellaneous routines 6702 * ========================================================================== 6703 */ 6704 6705/* 6706 * Remove all pools in the system. 6707 */ 6708void 6709spa_evict_all(void) 6710{ 6711 spa_t *spa; 6712 6713 /* 6714 * Remove all cached state. All pools should be closed now, 6715 * so every spa in the AVL tree should be unreferenced. 6716 */ 6717 mutex_enter(&spa_namespace_lock); 6718 while ((spa = spa_next(NULL)) != NULL) { 6719 /* 6720 * Stop async tasks. The async thread may need to detach 6721 * a device that's been replaced, which requires grabbing 6722 * spa_namespace_lock, so we must drop it here. 6723 */ 6724 spa_open_ref(spa, FTAG); 6725 mutex_exit(&spa_namespace_lock); 6726 spa_async_suspend(spa); 6727 mutex_enter(&spa_namespace_lock); 6728 spa_close(spa, FTAG); 6729 6730 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 6731 spa_unload(spa); 6732 spa_deactivate(spa); 6733 } 6734 spa_remove(spa); 6735 } 6736 mutex_exit(&spa_namespace_lock); 6737} 6738 6739vdev_t * 6740spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 6741{ 6742 vdev_t *vd; 6743 int i; 6744 6745 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 6746 return (vd); 6747 6748 if (aux) { 6749 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 6750 vd = spa->spa_l2cache.sav_vdevs[i]; 6751 if (vd->vdev_guid == guid) 6752 return (vd); 6753 } 6754 6755 for (i = 0; i < spa->spa_spares.sav_count; i++) { 6756 vd = spa->spa_spares.sav_vdevs[i]; 6757 if (vd->vdev_guid == guid) 6758 return (vd); 6759 } 6760 } 6761 6762 return (NULL); 6763} 6764 6765void 6766spa_upgrade(spa_t *spa, uint64_t version) 6767{ 6768 ASSERT(spa_writeable(spa)); 6769 6770 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 6771 6772 /* 6773 * This should only be called for a non-faulted pool, and since a 6774 * future version would result in an unopenable pool, this shouldn't be 6775 * possible. 6776 */ 6777 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); 6778 ASSERT(version >= spa->spa_uberblock.ub_version); 6779 6780 spa->spa_uberblock.ub_version = version; 6781 vdev_config_dirty(spa->spa_root_vdev); 6782 6783 spa_config_exit(spa, SCL_ALL, FTAG); 6784 6785 txg_wait_synced(spa_get_dsl(spa), 0); 6786} 6787 6788boolean_t 6789spa_has_spare(spa_t *spa, uint64_t guid) 6790{ 6791 int i; 6792 uint64_t spareguid; 6793 spa_aux_vdev_t *sav = &spa->spa_spares; 6794 6795 for (i = 0; i < sav->sav_count; i++) 6796 if (sav->sav_vdevs[i]->vdev_guid == guid) 6797 return (B_TRUE); 6798 6799 for (i = 0; i < sav->sav_npending; i++) { 6800 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 6801 &spareguid) == 0 && spareguid == guid) 6802 return (B_TRUE); 6803 } 6804 6805 return (B_FALSE); 6806} 6807 6808/* 6809 * Check if a pool has an active shared spare device. 6810 * Note: reference count of an active spare is 2, as a spare and as a replace 6811 */ 6812static boolean_t 6813spa_has_active_shared_spare(spa_t *spa) 6814{ 6815 int i, refcnt; 6816 uint64_t pool; 6817 spa_aux_vdev_t *sav = &spa->spa_spares; 6818 6819 for (i = 0; i < sav->sav_count; i++) { 6820 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 6821 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 6822 refcnt > 2) 6823 return (B_TRUE); 6824 } 6825 6826 return (B_FALSE); 6827} 6828 6829/* 6830 * Post a sysevent corresponding to the given event. The 'name' must be one of 6831 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 6832 * filled in from the spa and (optionally) the vdev. This doesn't do anything 6833 * in the userland libzpool, as we don't want consumers to misinterpret ztest 6834 * or zdb as real changes. 6835 */ 6836void 6837spa_event_notify(spa_t *spa, vdev_t *vd, const char *name) 6838{ 6839#ifdef _KERNEL 6840 sysevent_t *ev; 6841 sysevent_attr_list_t *attr = NULL; 6842 sysevent_value_t value; 6843 sysevent_id_t eid; 6844 6845 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 6846 SE_SLEEP); 6847 6848 value.value_type = SE_DATA_TYPE_STRING; 6849 value.value.sv_string = spa_name(spa); 6850 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 6851 goto done; 6852 6853 value.value_type = SE_DATA_TYPE_UINT64; 6854 value.value.sv_uint64 = spa_guid(spa); 6855 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 6856 goto done; 6857 6858 if (vd) { 6859 value.value_type = SE_DATA_TYPE_UINT64; 6860 value.value.sv_uint64 = vd->vdev_guid; 6861 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 6862 SE_SLEEP) != 0) 6863 goto done; 6864 6865 if (vd->vdev_path) { 6866 value.value_type = SE_DATA_TYPE_STRING; 6867 value.value.sv_string = vd->vdev_path; 6868 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 6869 &value, SE_SLEEP) != 0) 6870 goto done; 6871 } 6872 } 6873 6874 if (sysevent_attach_attributes(ev, attr) != 0) 6875 goto done; 6876 attr = NULL; 6877 6878 (void) log_sysevent(ev, SE_SLEEP, &eid); 6879 6880done: 6881 if (attr) 6882 sysevent_free_attr(attr); 6883 sysevent_free(ev); 6884#endif 6885} 6886