spa.c revision 264670
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 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 957 } 958 959 taskq_dispatch_ent(tq, func, arg, flags, ent); 960} 961 962static void 963spa_create_zio_taskqs(spa_t *spa) 964{ 965 for (int t = 0; t < ZIO_TYPES; t++) { 966 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 967 spa_taskqs_init(spa, t, q); 968 } 969 } 970} 971 972#ifdef _KERNEL 973#ifdef SPA_PROCESS 974static void 975spa_thread(void *arg) 976{ 977 callb_cpr_t cprinfo; 978 979 spa_t *spa = arg; 980 user_t *pu = PTOU(curproc); 981 982 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 983 spa->spa_name); 984 985 ASSERT(curproc != &p0); 986 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 987 "zpool-%s", spa->spa_name); 988 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 989 990#ifdef PSRSET_BIND 991 /* bind this thread to the requested psrset */ 992 if (zio_taskq_psrset_bind != PS_NONE) { 993 pool_lock(); 994 mutex_enter(&cpu_lock); 995 mutex_enter(&pidlock); 996 mutex_enter(&curproc->p_lock); 997 998 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 999 0, NULL, NULL) == 0) { 1000 curthread->t_bind_pset = zio_taskq_psrset_bind; 1001 } else { 1002 cmn_err(CE_WARN, 1003 "Couldn't bind process for zfs pool \"%s\" to " 1004 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1005 } 1006 1007 mutex_exit(&curproc->p_lock); 1008 mutex_exit(&pidlock); 1009 mutex_exit(&cpu_lock); 1010 pool_unlock(); 1011 } 1012#endif 1013 1014#ifdef SYSDC 1015 if (zio_taskq_sysdc) { 1016 sysdc_thread_enter(curthread, 100, 0); 1017 } 1018#endif 1019 1020 spa->spa_proc = curproc; 1021 spa->spa_did = curthread->t_did; 1022 1023 spa_create_zio_taskqs(spa); 1024 1025 mutex_enter(&spa->spa_proc_lock); 1026 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1027 1028 spa->spa_proc_state = SPA_PROC_ACTIVE; 1029 cv_broadcast(&spa->spa_proc_cv); 1030 1031 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1032 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1033 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1034 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1035 1036 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1037 spa->spa_proc_state = SPA_PROC_GONE; 1038 spa->spa_proc = &p0; 1039 cv_broadcast(&spa->spa_proc_cv); 1040 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1041 1042 mutex_enter(&curproc->p_lock); 1043 lwp_exit(); 1044} 1045#endif /* SPA_PROCESS */ 1046#endif 1047 1048/* 1049 * Activate an uninitialized pool. 1050 */ 1051static void 1052spa_activate(spa_t *spa, int mode) 1053{ 1054 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1055 1056 spa->spa_state = POOL_STATE_ACTIVE; 1057 spa->spa_mode = mode; 1058 1059 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1060 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1061 1062 /* Try to create a covering process */ 1063 mutex_enter(&spa->spa_proc_lock); 1064 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1065 ASSERT(spa->spa_proc == &p0); 1066 spa->spa_did = 0; 1067 1068#ifdef SPA_PROCESS 1069 /* Only create a process if we're going to be around a while. */ 1070 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1071 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1072 NULL, 0) == 0) { 1073 spa->spa_proc_state = SPA_PROC_CREATED; 1074 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1075 cv_wait(&spa->spa_proc_cv, 1076 &spa->spa_proc_lock); 1077 } 1078 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1079 ASSERT(spa->spa_proc != &p0); 1080 ASSERT(spa->spa_did != 0); 1081 } else { 1082#ifdef _KERNEL 1083 cmn_err(CE_WARN, 1084 "Couldn't create process for zfs pool \"%s\"\n", 1085 spa->spa_name); 1086#endif 1087 } 1088 } 1089#endif /* SPA_PROCESS */ 1090 mutex_exit(&spa->spa_proc_lock); 1091 1092 /* If we didn't create a process, we need to create our taskqs. */ 1093 ASSERT(spa->spa_proc == &p0); 1094 if (spa->spa_proc == &p0) { 1095 spa_create_zio_taskqs(spa); 1096 } 1097 1098 /* 1099 * Start TRIM thread. 1100 */ 1101 trim_thread_create(spa); 1102 1103 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1104 offsetof(vdev_t, vdev_config_dirty_node)); 1105 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1106 offsetof(vdev_t, vdev_state_dirty_node)); 1107 1108 txg_list_create(&spa->spa_vdev_txg_list, 1109 offsetof(struct vdev, vdev_txg_node)); 1110 1111 avl_create(&spa->spa_errlist_scrub, 1112 spa_error_entry_compare, sizeof (spa_error_entry_t), 1113 offsetof(spa_error_entry_t, se_avl)); 1114 avl_create(&spa->spa_errlist_last, 1115 spa_error_entry_compare, sizeof (spa_error_entry_t), 1116 offsetof(spa_error_entry_t, se_avl)); 1117} 1118 1119/* 1120 * Opposite of spa_activate(). 1121 */ 1122static void 1123spa_deactivate(spa_t *spa) 1124{ 1125 ASSERT(spa->spa_sync_on == B_FALSE); 1126 ASSERT(spa->spa_dsl_pool == NULL); 1127 ASSERT(spa->spa_root_vdev == NULL); 1128 ASSERT(spa->spa_async_zio_root == NULL); 1129 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1130 1131 /* 1132 * Stop TRIM thread in case spa_unload() wasn't called directly 1133 * before spa_deactivate(). 1134 */ 1135 trim_thread_destroy(spa); 1136 1137 txg_list_destroy(&spa->spa_vdev_txg_list); 1138 1139 list_destroy(&spa->spa_config_dirty_list); 1140 list_destroy(&spa->spa_state_dirty_list); 1141 1142 for (int t = 0; t < ZIO_TYPES; t++) { 1143 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1144 spa_taskqs_fini(spa, t, q); 1145 } 1146 } 1147 1148 metaslab_class_destroy(spa->spa_normal_class); 1149 spa->spa_normal_class = NULL; 1150 1151 metaslab_class_destroy(spa->spa_log_class); 1152 spa->spa_log_class = NULL; 1153 1154 /* 1155 * If this was part of an import or the open otherwise failed, we may 1156 * still have errors left in the queues. Empty them just in case. 1157 */ 1158 spa_errlog_drain(spa); 1159 1160 avl_destroy(&spa->spa_errlist_scrub); 1161 avl_destroy(&spa->spa_errlist_last); 1162 1163 spa->spa_state = POOL_STATE_UNINITIALIZED; 1164 1165 mutex_enter(&spa->spa_proc_lock); 1166 if (spa->spa_proc_state != SPA_PROC_NONE) { 1167 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1168 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1169 cv_broadcast(&spa->spa_proc_cv); 1170 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1171 ASSERT(spa->spa_proc != &p0); 1172 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1173 } 1174 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1175 spa->spa_proc_state = SPA_PROC_NONE; 1176 } 1177 ASSERT(spa->spa_proc == &p0); 1178 mutex_exit(&spa->spa_proc_lock); 1179 1180#ifdef SPA_PROCESS 1181 /* 1182 * We want to make sure spa_thread() has actually exited the ZFS 1183 * module, so that the module can't be unloaded out from underneath 1184 * it. 1185 */ 1186 if (spa->spa_did != 0) { 1187 thread_join(spa->spa_did); 1188 spa->spa_did = 0; 1189 } 1190#endif /* SPA_PROCESS */ 1191} 1192 1193/* 1194 * Verify a pool configuration, and construct the vdev tree appropriately. This 1195 * will create all the necessary vdevs in the appropriate layout, with each vdev 1196 * in the CLOSED state. This will prep the pool before open/creation/import. 1197 * All vdev validation is done by the vdev_alloc() routine. 1198 */ 1199static int 1200spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1201 uint_t id, int atype) 1202{ 1203 nvlist_t **child; 1204 uint_t children; 1205 int error; 1206 1207 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1208 return (error); 1209 1210 if ((*vdp)->vdev_ops->vdev_op_leaf) 1211 return (0); 1212 1213 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1214 &child, &children); 1215 1216 if (error == ENOENT) 1217 return (0); 1218 1219 if (error) { 1220 vdev_free(*vdp); 1221 *vdp = NULL; 1222 return (SET_ERROR(EINVAL)); 1223 } 1224 1225 for (int c = 0; c < children; c++) { 1226 vdev_t *vd; 1227 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1228 atype)) != 0) { 1229 vdev_free(*vdp); 1230 *vdp = NULL; 1231 return (error); 1232 } 1233 } 1234 1235 ASSERT(*vdp != NULL); 1236 1237 return (0); 1238} 1239 1240/* 1241 * Opposite of spa_load(). 1242 */ 1243static void 1244spa_unload(spa_t *spa) 1245{ 1246 int i; 1247 1248 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1249 1250 /* 1251 * Stop TRIM thread. 1252 */ 1253 trim_thread_destroy(spa); 1254 1255 /* 1256 * Stop async tasks. 1257 */ 1258 spa_async_suspend(spa); 1259 1260 /* 1261 * Stop syncing. 1262 */ 1263 if (spa->spa_sync_on) { 1264 txg_sync_stop(spa->spa_dsl_pool); 1265 spa->spa_sync_on = B_FALSE; 1266 } 1267 1268 /* 1269 * Wait for any outstanding async I/O to complete. 1270 */ 1271 if (spa->spa_async_zio_root != NULL) { 1272 (void) zio_wait(spa->spa_async_zio_root); 1273 spa->spa_async_zio_root = NULL; 1274 } 1275 1276 bpobj_close(&spa->spa_deferred_bpobj); 1277 1278 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1279 1280 /* 1281 * Close all vdevs. 1282 */ 1283 if (spa->spa_root_vdev) 1284 vdev_free(spa->spa_root_vdev); 1285 ASSERT(spa->spa_root_vdev == NULL); 1286 1287 /* 1288 * Close the dsl pool. 1289 */ 1290 if (spa->spa_dsl_pool) { 1291 dsl_pool_close(spa->spa_dsl_pool); 1292 spa->spa_dsl_pool = NULL; 1293 spa->spa_meta_objset = NULL; 1294 } 1295 1296 ddt_unload(spa); 1297 1298 1299 /* 1300 * Drop and purge level 2 cache 1301 */ 1302 spa_l2cache_drop(spa); 1303 1304 for (i = 0; i < spa->spa_spares.sav_count; i++) 1305 vdev_free(spa->spa_spares.sav_vdevs[i]); 1306 if (spa->spa_spares.sav_vdevs) { 1307 kmem_free(spa->spa_spares.sav_vdevs, 1308 spa->spa_spares.sav_count * sizeof (void *)); 1309 spa->spa_spares.sav_vdevs = NULL; 1310 } 1311 if (spa->spa_spares.sav_config) { 1312 nvlist_free(spa->spa_spares.sav_config); 1313 spa->spa_spares.sav_config = NULL; 1314 } 1315 spa->spa_spares.sav_count = 0; 1316 1317 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1318 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1319 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1320 } 1321 if (spa->spa_l2cache.sav_vdevs) { 1322 kmem_free(spa->spa_l2cache.sav_vdevs, 1323 spa->spa_l2cache.sav_count * sizeof (void *)); 1324 spa->spa_l2cache.sav_vdevs = NULL; 1325 } 1326 if (spa->spa_l2cache.sav_config) { 1327 nvlist_free(spa->spa_l2cache.sav_config); 1328 spa->spa_l2cache.sav_config = NULL; 1329 } 1330 spa->spa_l2cache.sav_count = 0; 1331 1332 spa->spa_async_suspended = 0; 1333 1334 if (spa->spa_comment != NULL) { 1335 spa_strfree(spa->spa_comment); 1336 spa->spa_comment = NULL; 1337 } 1338 1339 spa_config_exit(spa, SCL_ALL, FTAG); 1340} 1341 1342/* 1343 * Load (or re-load) the current list of vdevs describing the active spares for 1344 * this pool. When this is called, we have some form of basic information in 1345 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1346 * then re-generate a more complete list including status information. 1347 */ 1348static void 1349spa_load_spares(spa_t *spa) 1350{ 1351 nvlist_t **spares; 1352 uint_t nspares; 1353 int i; 1354 vdev_t *vd, *tvd; 1355 1356 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1357 1358 /* 1359 * First, close and free any existing spare vdevs. 1360 */ 1361 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1362 vd = spa->spa_spares.sav_vdevs[i]; 1363 1364 /* Undo the call to spa_activate() below */ 1365 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1366 B_FALSE)) != NULL && tvd->vdev_isspare) 1367 spa_spare_remove(tvd); 1368 vdev_close(vd); 1369 vdev_free(vd); 1370 } 1371 1372 if (spa->spa_spares.sav_vdevs) 1373 kmem_free(spa->spa_spares.sav_vdevs, 1374 spa->spa_spares.sav_count * sizeof (void *)); 1375 1376 if (spa->spa_spares.sav_config == NULL) 1377 nspares = 0; 1378 else 1379 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1380 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1381 1382 spa->spa_spares.sav_count = (int)nspares; 1383 spa->spa_spares.sav_vdevs = NULL; 1384 1385 if (nspares == 0) 1386 return; 1387 1388 /* 1389 * Construct the array of vdevs, opening them to get status in the 1390 * process. For each spare, there is potentially two different vdev_t 1391 * structures associated with it: one in the list of spares (used only 1392 * for basic validation purposes) and one in the active vdev 1393 * configuration (if it's spared in). During this phase we open and 1394 * validate each vdev on the spare list. If the vdev also exists in the 1395 * active configuration, then we also mark this vdev as an active spare. 1396 */ 1397 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1398 KM_SLEEP); 1399 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1400 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1401 VDEV_ALLOC_SPARE) == 0); 1402 ASSERT(vd != NULL); 1403 1404 spa->spa_spares.sav_vdevs[i] = vd; 1405 1406 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1407 B_FALSE)) != NULL) { 1408 if (!tvd->vdev_isspare) 1409 spa_spare_add(tvd); 1410 1411 /* 1412 * We only mark the spare active if we were successfully 1413 * able to load the vdev. Otherwise, importing a pool 1414 * with a bad active spare would result in strange 1415 * behavior, because multiple pool would think the spare 1416 * is actively in use. 1417 * 1418 * There is a vulnerability here to an equally bizarre 1419 * circumstance, where a dead active spare is later 1420 * brought back to life (onlined or otherwise). Given 1421 * the rarity of this scenario, and the extra complexity 1422 * it adds, we ignore the possibility. 1423 */ 1424 if (!vdev_is_dead(tvd)) 1425 spa_spare_activate(tvd); 1426 } 1427 1428 vd->vdev_top = vd; 1429 vd->vdev_aux = &spa->spa_spares; 1430 1431 if (vdev_open(vd) != 0) 1432 continue; 1433 1434 if (vdev_validate_aux(vd) == 0) 1435 spa_spare_add(vd); 1436 } 1437 1438 /* 1439 * Recompute the stashed list of spares, with status information 1440 * this time. 1441 */ 1442 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1443 DATA_TYPE_NVLIST_ARRAY) == 0); 1444 1445 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1446 KM_SLEEP); 1447 for (i = 0; i < spa->spa_spares.sav_count; i++) 1448 spares[i] = vdev_config_generate(spa, 1449 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1450 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1451 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1452 for (i = 0; i < spa->spa_spares.sav_count; i++) 1453 nvlist_free(spares[i]); 1454 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1455} 1456 1457/* 1458 * Load (or re-load) the current list of vdevs describing the active l2cache for 1459 * this pool. When this is called, we have some form of basic information in 1460 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1461 * then re-generate a more complete list including status information. 1462 * Devices which are already active have their details maintained, and are 1463 * not re-opened. 1464 */ 1465static void 1466spa_load_l2cache(spa_t *spa) 1467{ 1468 nvlist_t **l2cache; 1469 uint_t nl2cache; 1470 int i, j, oldnvdevs; 1471 uint64_t guid; 1472 vdev_t *vd, **oldvdevs, **newvdevs; 1473 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1474 1475 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1476 1477 if (sav->sav_config != NULL) { 1478 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1479 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1480 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1481 } else { 1482 nl2cache = 0; 1483 newvdevs = NULL; 1484 } 1485 1486 oldvdevs = sav->sav_vdevs; 1487 oldnvdevs = sav->sav_count; 1488 sav->sav_vdevs = NULL; 1489 sav->sav_count = 0; 1490 1491 /* 1492 * Process new nvlist of vdevs. 1493 */ 1494 for (i = 0; i < nl2cache; i++) { 1495 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1496 &guid) == 0); 1497 1498 newvdevs[i] = NULL; 1499 for (j = 0; j < oldnvdevs; j++) { 1500 vd = oldvdevs[j]; 1501 if (vd != NULL && guid == vd->vdev_guid) { 1502 /* 1503 * Retain previous vdev for add/remove ops. 1504 */ 1505 newvdevs[i] = vd; 1506 oldvdevs[j] = NULL; 1507 break; 1508 } 1509 } 1510 1511 if (newvdevs[i] == NULL) { 1512 /* 1513 * Create new vdev 1514 */ 1515 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1516 VDEV_ALLOC_L2CACHE) == 0); 1517 ASSERT(vd != NULL); 1518 newvdevs[i] = vd; 1519 1520 /* 1521 * Commit this vdev as an l2cache device, 1522 * even if it fails to open. 1523 */ 1524 spa_l2cache_add(vd); 1525 1526 vd->vdev_top = vd; 1527 vd->vdev_aux = sav; 1528 1529 spa_l2cache_activate(vd); 1530 1531 if (vdev_open(vd) != 0) 1532 continue; 1533 1534 (void) vdev_validate_aux(vd); 1535 1536 if (!vdev_is_dead(vd)) 1537 l2arc_add_vdev(spa, vd); 1538 } 1539 } 1540 1541 /* 1542 * Purge vdevs that were dropped 1543 */ 1544 for (i = 0; i < oldnvdevs; i++) { 1545 uint64_t pool; 1546 1547 vd = oldvdevs[i]; 1548 if (vd != NULL) { 1549 ASSERT(vd->vdev_isl2cache); 1550 1551 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1552 pool != 0ULL && l2arc_vdev_present(vd)) 1553 l2arc_remove_vdev(vd); 1554 vdev_clear_stats(vd); 1555 vdev_free(vd); 1556 } 1557 } 1558 1559 if (oldvdevs) 1560 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1561 1562 if (sav->sav_config == NULL) 1563 goto out; 1564 1565 sav->sav_vdevs = newvdevs; 1566 sav->sav_count = (int)nl2cache; 1567 1568 /* 1569 * Recompute the stashed list of l2cache devices, with status 1570 * information this time. 1571 */ 1572 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1573 DATA_TYPE_NVLIST_ARRAY) == 0); 1574 1575 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1576 for (i = 0; i < sav->sav_count; i++) 1577 l2cache[i] = vdev_config_generate(spa, 1578 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1579 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1580 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1581out: 1582 for (i = 0; i < sav->sav_count; i++) 1583 nvlist_free(l2cache[i]); 1584 if (sav->sav_count) 1585 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1586} 1587 1588static int 1589load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1590{ 1591 dmu_buf_t *db; 1592 char *packed = NULL; 1593 size_t nvsize = 0; 1594 int error; 1595 *value = NULL; 1596 1597 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1598 if (error != 0) 1599 return (error); 1600 nvsize = *(uint64_t *)db->db_data; 1601 dmu_buf_rele(db, FTAG); 1602 1603 packed = kmem_alloc(nvsize, KM_SLEEP); 1604 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1605 DMU_READ_PREFETCH); 1606 if (error == 0) 1607 error = nvlist_unpack(packed, nvsize, value, 0); 1608 kmem_free(packed, nvsize); 1609 1610 return (error); 1611} 1612 1613/* 1614 * Checks to see if the given vdev could not be opened, in which case we post a 1615 * sysevent to notify the autoreplace code that the device has been removed. 1616 */ 1617static void 1618spa_check_removed(vdev_t *vd) 1619{ 1620 for (int c = 0; c < vd->vdev_children; c++) 1621 spa_check_removed(vd->vdev_child[c]); 1622 1623 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1624 !vd->vdev_ishole) { 1625 zfs_post_autoreplace(vd->vdev_spa, vd); 1626 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); 1627 } 1628} 1629 1630/* 1631 * Validate the current config against the MOS config 1632 */ 1633static boolean_t 1634spa_config_valid(spa_t *spa, nvlist_t *config) 1635{ 1636 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 1637 nvlist_t *nv; 1638 1639 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); 1640 1641 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1642 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 1643 1644 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); 1645 1646 /* 1647 * If we're doing a normal import, then build up any additional 1648 * diagnostic information about missing devices in this config. 1649 * We'll pass this up to the user for further processing. 1650 */ 1651 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1652 nvlist_t **child, *nv; 1653 uint64_t idx = 0; 1654 1655 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1656 KM_SLEEP); 1657 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1658 1659 for (int c = 0; c < rvd->vdev_children; c++) { 1660 vdev_t *tvd = rvd->vdev_child[c]; 1661 vdev_t *mtvd = mrvd->vdev_child[c]; 1662 1663 if (tvd->vdev_ops == &vdev_missing_ops && 1664 mtvd->vdev_ops != &vdev_missing_ops && 1665 mtvd->vdev_islog) 1666 child[idx++] = vdev_config_generate(spa, mtvd, 1667 B_FALSE, 0); 1668 } 1669 1670 if (idx) { 1671 VERIFY(nvlist_add_nvlist_array(nv, 1672 ZPOOL_CONFIG_CHILDREN, child, idx) == 0); 1673 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 1674 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); 1675 1676 for (int i = 0; i < idx; i++) 1677 nvlist_free(child[i]); 1678 } 1679 nvlist_free(nv); 1680 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1681 } 1682 1683 /* 1684 * Compare the root vdev tree with the information we have 1685 * from the MOS config (mrvd). Check each top-level vdev 1686 * with the corresponding MOS config top-level (mtvd). 1687 */ 1688 for (int c = 0; c < rvd->vdev_children; c++) { 1689 vdev_t *tvd = rvd->vdev_child[c]; 1690 vdev_t *mtvd = mrvd->vdev_child[c]; 1691 1692 /* 1693 * Resolve any "missing" vdevs in the current configuration. 1694 * If we find that the MOS config has more accurate information 1695 * about the top-level vdev then use that vdev instead. 1696 */ 1697 if (tvd->vdev_ops == &vdev_missing_ops && 1698 mtvd->vdev_ops != &vdev_missing_ops) { 1699 1700 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) 1701 continue; 1702 1703 /* 1704 * Device specific actions. 1705 */ 1706 if (mtvd->vdev_islog) { 1707 spa_set_log_state(spa, SPA_LOG_CLEAR); 1708 } else { 1709 /* 1710 * XXX - once we have 'readonly' pool 1711 * support we should be able to handle 1712 * missing data devices by transitioning 1713 * the pool to readonly. 1714 */ 1715 continue; 1716 } 1717 1718 /* 1719 * Swap the missing vdev with the data we were 1720 * able to obtain from the MOS config. 1721 */ 1722 vdev_remove_child(rvd, tvd); 1723 vdev_remove_child(mrvd, mtvd); 1724 1725 vdev_add_child(rvd, mtvd); 1726 vdev_add_child(mrvd, tvd); 1727 1728 spa_config_exit(spa, SCL_ALL, FTAG); 1729 vdev_load(mtvd); 1730 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1731 1732 vdev_reopen(rvd); 1733 } else if (mtvd->vdev_islog) { 1734 /* 1735 * Load the slog device's state from the MOS config 1736 * since it's possible that the label does not 1737 * contain the most up-to-date information. 1738 */ 1739 vdev_load_log_state(tvd, mtvd); 1740 vdev_reopen(tvd); 1741 } 1742 } 1743 vdev_free(mrvd); 1744 spa_config_exit(spa, SCL_ALL, FTAG); 1745 1746 /* 1747 * Ensure we were able to validate the config. 1748 */ 1749 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); 1750} 1751 1752/* 1753 * Check for missing log devices 1754 */ 1755static boolean_t 1756spa_check_logs(spa_t *spa) 1757{ 1758 boolean_t rv = B_FALSE; 1759 1760 switch (spa->spa_log_state) { 1761 case SPA_LOG_MISSING: 1762 /* need to recheck in case slog has been restored */ 1763 case SPA_LOG_UNKNOWN: 1764 rv = (dmu_objset_find(spa->spa_name, zil_check_log_chain, 1765 NULL, DS_FIND_CHILDREN) != 0); 1766 if (rv) 1767 spa_set_log_state(spa, SPA_LOG_MISSING); 1768 break; 1769 } 1770 return (rv); 1771} 1772 1773static boolean_t 1774spa_passivate_log(spa_t *spa) 1775{ 1776 vdev_t *rvd = spa->spa_root_vdev; 1777 boolean_t slog_found = B_FALSE; 1778 1779 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1780 1781 if (!spa_has_slogs(spa)) 1782 return (B_FALSE); 1783 1784 for (int c = 0; c < rvd->vdev_children; c++) { 1785 vdev_t *tvd = rvd->vdev_child[c]; 1786 metaslab_group_t *mg = tvd->vdev_mg; 1787 1788 if (tvd->vdev_islog) { 1789 metaslab_group_passivate(mg); 1790 slog_found = B_TRUE; 1791 } 1792 } 1793 1794 return (slog_found); 1795} 1796 1797static void 1798spa_activate_log(spa_t *spa) 1799{ 1800 vdev_t *rvd = spa->spa_root_vdev; 1801 1802 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1803 1804 for (int c = 0; c < rvd->vdev_children; c++) { 1805 vdev_t *tvd = rvd->vdev_child[c]; 1806 metaslab_group_t *mg = tvd->vdev_mg; 1807 1808 if (tvd->vdev_islog) 1809 metaslab_group_activate(mg); 1810 } 1811} 1812 1813int 1814spa_offline_log(spa_t *spa) 1815{ 1816 int error; 1817 1818 error = dmu_objset_find(spa_name(spa), zil_vdev_offline, 1819 NULL, DS_FIND_CHILDREN); 1820 if (error == 0) { 1821 /* 1822 * We successfully offlined the log device, sync out the 1823 * current txg so that the "stubby" block can be removed 1824 * by zil_sync(). 1825 */ 1826 txg_wait_synced(spa->spa_dsl_pool, 0); 1827 } 1828 return (error); 1829} 1830 1831static void 1832spa_aux_check_removed(spa_aux_vdev_t *sav) 1833{ 1834 int i; 1835 1836 for (i = 0; i < sav->sav_count; i++) 1837 spa_check_removed(sav->sav_vdevs[i]); 1838} 1839 1840void 1841spa_claim_notify(zio_t *zio) 1842{ 1843 spa_t *spa = zio->io_spa; 1844 1845 if (zio->io_error) 1846 return; 1847 1848 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1849 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1850 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1851 mutex_exit(&spa->spa_props_lock); 1852} 1853 1854typedef struct spa_load_error { 1855 uint64_t sle_meta_count; 1856 uint64_t sle_data_count; 1857} spa_load_error_t; 1858 1859static void 1860spa_load_verify_done(zio_t *zio) 1861{ 1862 blkptr_t *bp = zio->io_bp; 1863 spa_load_error_t *sle = zio->io_private; 1864 dmu_object_type_t type = BP_GET_TYPE(bp); 1865 int error = zio->io_error; 1866 1867 if (error) { 1868 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 1869 type != DMU_OT_INTENT_LOG) 1870 atomic_add_64(&sle->sle_meta_count, 1); 1871 else 1872 atomic_add_64(&sle->sle_data_count, 1); 1873 } 1874 zio_data_buf_free(zio->io_data, zio->io_size); 1875} 1876 1877/*ARGSUSED*/ 1878static int 1879spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1880 const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg) 1881{ 1882 if (!BP_IS_HOLE(bp)) { 1883 zio_t *rio = arg; 1884 size_t size = BP_GET_PSIZE(bp); 1885 void *data = zio_data_buf_alloc(size); 1886 1887 zio_nowait(zio_read(rio, spa, bp, data, size, 1888 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 1889 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 1890 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 1891 } 1892 return (0); 1893} 1894 1895static int 1896spa_load_verify(spa_t *spa) 1897{ 1898 zio_t *rio; 1899 spa_load_error_t sle = { 0 }; 1900 zpool_rewind_policy_t policy; 1901 boolean_t verify_ok = B_FALSE; 1902 int error; 1903 1904 zpool_get_rewind_policy(spa->spa_config, &policy); 1905 1906 if (policy.zrp_request & ZPOOL_NEVER_REWIND) 1907 return (0); 1908 1909 rio = zio_root(spa, NULL, &sle, 1910 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1911 1912 error = traverse_pool(spa, spa->spa_verify_min_txg, 1913 TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio); 1914 1915 (void) zio_wait(rio); 1916 1917 spa->spa_load_meta_errors = sle.sle_meta_count; 1918 spa->spa_load_data_errors = sle.sle_data_count; 1919 1920 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && 1921 sle.sle_data_count <= policy.zrp_maxdata) { 1922 int64_t loss = 0; 1923 1924 verify_ok = B_TRUE; 1925 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 1926 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 1927 1928 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 1929 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1930 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 1931 VERIFY(nvlist_add_int64(spa->spa_load_info, 1932 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 1933 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1934 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 1935 } else { 1936 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 1937 } 1938 1939 if (error) { 1940 if (error != ENXIO && error != EIO) 1941 error = SET_ERROR(EIO); 1942 return (error); 1943 } 1944 1945 return (verify_ok ? 0 : EIO); 1946} 1947 1948/* 1949 * Find a value in the pool props object. 1950 */ 1951static void 1952spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 1953{ 1954 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 1955 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 1956} 1957 1958/* 1959 * Find a value in the pool directory object. 1960 */ 1961static int 1962spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) 1963{ 1964 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 1965 name, sizeof (uint64_t), 1, val)); 1966} 1967 1968static int 1969spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 1970{ 1971 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 1972 return (err); 1973} 1974 1975/* 1976 * Fix up config after a partly-completed split. This is done with the 1977 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 1978 * pool have that entry in their config, but only the splitting one contains 1979 * a list of all the guids of the vdevs that are being split off. 1980 * 1981 * This function determines what to do with that list: either rejoin 1982 * all the disks to the pool, or complete the splitting process. To attempt 1983 * the rejoin, each disk that is offlined is marked online again, and 1984 * we do a reopen() call. If the vdev label for every disk that was 1985 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 1986 * then we call vdev_split() on each disk, and complete the split. 1987 * 1988 * Otherwise we leave the config alone, with all the vdevs in place in 1989 * the original pool. 1990 */ 1991static void 1992spa_try_repair(spa_t *spa, nvlist_t *config) 1993{ 1994 uint_t extracted; 1995 uint64_t *glist; 1996 uint_t i, gcount; 1997 nvlist_t *nvl; 1998 vdev_t **vd; 1999 boolean_t attempt_reopen; 2000 2001 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2002 return; 2003 2004 /* check that the config is complete */ 2005 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2006 &glist, &gcount) != 0) 2007 return; 2008 2009 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2010 2011 /* attempt to online all the vdevs & validate */ 2012 attempt_reopen = B_TRUE; 2013 for (i = 0; i < gcount; i++) { 2014 if (glist[i] == 0) /* vdev is hole */ 2015 continue; 2016 2017 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2018 if (vd[i] == NULL) { 2019 /* 2020 * Don't bother attempting to reopen the disks; 2021 * just do the split. 2022 */ 2023 attempt_reopen = B_FALSE; 2024 } else { 2025 /* attempt to re-online it */ 2026 vd[i]->vdev_offline = B_FALSE; 2027 } 2028 } 2029 2030 if (attempt_reopen) { 2031 vdev_reopen(spa->spa_root_vdev); 2032 2033 /* check each device to see what state it's in */ 2034 for (extracted = 0, i = 0; i < gcount; i++) { 2035 if (vd[i] != NULL && 2036 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2037 break; 2038 ++extracted; 2039 } 2040 } 2041 2042 /* 2043 * If every disk has been moved to the new pool, or if we never 2044 * even attempted to look at them, then we split them off for 2045 * good. 2046 */ 2047 if (!attempt_reopen || gcount == extracted) { 2048 for (i = 0; i < gcount; i++) 2049 if (vd[i] != NULL) 2050 vdev_split(vd[i]); 2051 vdev_reopen(spa->spa_root_vdev); 2052 } 2053 2054 kmem_free(vd, gcount * sizeof (vdev_t *)); 2055} 2056 2057static int 2058spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, 2059 boolean_t mosconfig) 2060{ 2061 nvlist_t *config = spa->spa_config; 2062 char *ereport = FM_EREPORT_ZFS_POOL; 2063 char *comment; 2064 int error; 2065 uint64_t pool_guid; 2066 nvlist_t *nvl; 2067 2068 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) 2069 return (SET_ERROR(EINVAL)); 2070 2071 ASSERT(spa->spa_comment == NULL); 2072 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2073 spa->spa_comment = spa_strdup(comment); 2074 2075 /* 2076 * Versioning wasn't explicitly added to the label until later, so if 2077 * it's not present treat it as the initial version. 2078 */ 2079 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2080 &spa->spa_ubsync.ub_version) != 0) 2081 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2082 2083 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2084 &spa->spa_config_txg); 2085 2086 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && 2087 spa_guid_exists(pool_guid, 0)) { 2088 error = SET_ERROR(EEXIST); 2089 } else { 2090 spa->spa_config_guid = pool_guid; 2091 2092 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, 2093 &nvl) == 0) { 2094 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, 2095 KM_SLEEP) == 0); 2096 } 2097 2098 nvlist_free(spa->spa_load_info); 2099 spa->spa_load_info = fnvlist_alloc(); 2100 2101 gethrestime(&spa->spa_loaded_ts); 2102 error = spa_load_impl(spa, pool_guid, config, state, type, 2103 mosconfig, &ereport); 2104 } 2105 2106 spa->spa_minref = refcount_count(&spa->spa_refcount); 2107 if (error) { 2108 if (error != EEXIST) { 2109 spa->spa_loaded_ts.tv_sec = 0; 2110 spa->spa_loaded_ts.tv_nsec = 0; 2111 } 2112 if (error != EBADF) { 2113 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); 2114 } 2115 } 2116 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2117 spa->spa_ena = 0; 2118 2119 return (error); 2120} 2121 2122/* 2123 * Load an existing storage pool, using the pool's builtin spa_config as a 2124 * source of configuration information. 2125 */ 2126static int 2127spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, 2128 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 2129 char **ereport) 2130{ 2131 int error = 0; 2132 nvlist_t *nvroot = NULL; 2133 nvlist_t *label; 2134 vdev_t *rvd; 2135 uberblock_t *ub = &spa->spa_uberblock; 2136 uint64_t children, config_cache_txg = spa->spa_config_txg; 2137 int orig_mode = spa->spa_mode; 2138 int parse; 2139 uint64_t obj; 2140 boolean_t missing_feat_write = B_FALSE; 2141 2142 /* 2143 * If this is an untrusted config, access the pool in read-only mode. 2144 * This prevents things like resilvering recently removed devices. 2145 */ 2146 if (!mosconfig) 2147 spa->spa_mode = FREAD; 2148 2149 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2150 2151 spa->spa_load_state = state; 2152 2153 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) 2154 return (SET_ERROR(EINVAL)); 2155 2156 parse = (type == SPA_IMPORT_EXISTING ? 2157 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2158 2159 /* 2160 * Create "The Godfather" zio to hold all async IOs 2161 */ 2162 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 2163 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 2164 2165 /* 2166 * Parse the configuration into a vdev tree. We explicitly set the 2167 * value that will be returned by spa_version() since parsing the 2168 * configuration requires knowing the version number. 2169 */ 2170 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2171 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); 2172 spa_config_exit(spa, SCL_ALL, FTAG); 2173 2174 if (error != 0) 2175 return (error); 2176 2177 ASSERT(spa->spa_root_vdev == rvd); 2178 2179 if (type != SPA_IMPORT_ASSEMBLE) { 2180 ASSERT(spa_guid(spa) == pool_guid); 2181 } 2182 2183 /* 2184 * Try to open all vdevs, loading each label in the process. 2185 */ 2186 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2187 error = vdev_open(rvd); 2188 spa_config_exit(spa, SCL_ALL, FTAG); 2189 if (error != 0) 2190 return (error); 2191 2192 /* 2193 * We need to validate the vdev labels against the configuration that 2194 * we have in hand, which is dependent on the setting of mosconfig. If 2195 * mosconfig is true then we're validating the vdev labels based on 2196 * that config. Otherwise, we're validating against the cached config 2197 * (zpool.cache) that was read when we loaded the zfs module, and then 2198 * later we will recursively call spa_load() and validate against 2199 * the vdev config. 2200 * 2201 * If we're assembling a new pool that's been split off from an 2202 * existing pool, the labels haven't yet been updated so we skip 2203 * validation for now. 2204 */ 2205 if (type != SPA_IMPORT_ASSEMBLE) { 2206 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2207 error = vdev_validate(rvd, mosconfig); 2208 spa_config_exit(spa, SCL_ALL, FTAG); 2209 2210 if (error != 0) 2211 return (error); 2212 2213 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2214 return (SET_ERROR(ENXIO)); 2215 } 2216 2217 /* 2218 * Find the best uberblock. 2219 */ 2220 vdev_uberblock_load(rvd, ub, &label); 2221 2222 /* 2223 * If we weren't able to find a single valid uberblock, return failure. 2224 */ 2225 if (ub->ub_txg == 0) { 2226 nvlist_free(label); 2227 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2228 } 2229 2230 /* 2231 * If the pool has an unsupported version we can't open it. 2232 */ 2233 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2234 nvlist_free(label); 2235 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2236 } 2237 2238 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2239 nvlist_t *features; 2240 2241 /* 2242 * If we weren't able to find what's necessary for reading the 2243 * MOS in the label, return failure. 2244 */ 2245 if (label == NULL || nvlist_lookup_nvlist(label, 2246 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { 2247 nvlist_free(label); 2248 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2249 ENXIO)); 2250 } 2251 2252 /* 2253 * Update our in-core representation with the definitive values 2254 * from the label. 2255 */ 2256 nvlist_free(spa->spa_label_features); 2257 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2258 } 2259 2260 nvlist_free(label); 2261 2262 /* 2263 * Look through entries in the label nvlist's features_for_read. If 2264 * there is a feature listed there which we don't understand then we 2265 * cannot open a pool. 2266 */ 2267 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2268 nvlist_t *unsup_feat; 2269 2270 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2271 0); 2272 2273 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2274 NULL); nvp != NULL; 2275 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2276 if (!zfeature_is_supported(nvpair_name(nvp))) { 2277 VERIFY(nvlist_add_string(unsup_feat, 2278 nvpair_name(nvp), "") == 0); 2279 } 2280 } 2281 2282 if (!nvlist_empty(unsup_feat)) { 2283 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2284 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2285 nvlist_free(unsup_feat); 2286 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2287 ENOTSUP)); 2288 } 2289 2290 nvlist_free(unsup_feat); 2291 } 2292 2293 /* 2294 * If the vdev guid sum doesn't match the uberblock, we have an 2295 * incomplete configuration. We first check to see if the pool 2296 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). 2297 * If it is, defer the vdev_guid_sum check till later so we 2298 * can handle missing vdevs. 2299 */ 2300 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, 2301 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && 2302 rvd->vdev_guid_sum != ub->ub_guid_sum) 2303 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 2304 2305 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2306 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2307 spa_try_repair(spa, config); 2308 spa_config_exit(spa, SCL_ALL, FTAG); 2309 nvlist_free(spa->spa_config_splitting); 2310 spa->spa_config_splitting = NULL; 2311 } 2312 2313 /* 2314 * Initialize internal SPA structures. 2315 */ 2316 spa->spa_state = POOL_STATE_ACTIVE; 2317 spa->spa_ubsync = spa->spa_uberblock; 2318 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2319 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2320 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2321 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2322 spa->spa_claim_max_txg = spa->spa_first_txg; 2323 spa->spa_prev_software_version = ub->ub_software_version; 2324 2325 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2326 if (error) 2327 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2328 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2329 2330 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) 2331 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2332 2333 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 2334 boolean_t missing_feat_read = B_FALSE; 2335 nvlist_t *unsup_feat, *enabled_feat; 2336 2337 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 2338 &spa->spa_feat_for_read_obj) != 0) { 2339 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2340 } 2341 2342 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 2343 &spa->spa_feat_for_write_obj) != 0) { 2344 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2345 } 2346 2347 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 2348 &spa->spa_feat_desc_obj) != 0) { 2349 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2350 } 2351 2352 enabled_feat = fnvlist_alloc(); 2353 unsup_feat = fnvlist_alloc(); 2354 2355 if (!spa_features_check(spa, B_FALSE, 2356 unsup_feat, enabled_feat)) 2357 missing_feat_read = B_TRUE; 2358 2359 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { 2360 if (!spa_features_check(spa, B_TRUE, 2361 unsup_feat, enabled_feat)) { 2362 missing_feat_write = B_TRUE; 2363 } 2364 } 2365 2366 fnvlist_add_nvlist(spa->spa_load_info, 2367 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 2368 2369 if (!nvlist_empty(unsup_feat)) { 2370 fnvlist_add_nvlist(spa->spa_load_info, 2371 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 2372 } 2373 2374 fnvlist_free(enabled_feat); 2375 fnvlist_free(unsup_feat); 2376 2377 if (!missing_feat_read) { 2378 fnvlist_add_boolean(spa->spa_load_info, 2379 ZPOOL_CONFIG_CAN_RDONLY); 2380 } 2381 2382 /* 2383 * If the state is SPA_LOAD_TRYIMPORT, our objective is 2384 * twofold: to determine whether the pool is available for 2385 * import in read-write mode and (if it is not) whether the 2386 * pool is available for import in read-only mode. If the pool 2387 * is available for import in read-write mode, it is displayed 2388 * as available in userland; if it is not available for import 2389 * in read-only mode, it is displayed as unavailable in 2390 * userland. If the pool is available for import in read-only 2391 * mode but not read-write mode, it is displayed as unavailable 2392 * in userland with a special note that the pool is actually 2393 * available for open in read-only mode. 2394 * 2395 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 2396 * missing a feature for write, we must first determine whether 2397 * the pool can be opened read-only before returning to 2398 * userland in order to know whether to display the 2399 * abovementioned note. 2400 */ 2401 if (missing_feat_read || (missing_feat_write && 2402 spa_writeable(spa))) { 2403 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2404 ENOTSUP)); 2405 } 2406 2407 /* 2408 * Load refcounts for ZFS features from disk into an in-memory 2409 * cache during SPA initialization. 2410 */ 2411 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 2412 uint64_t refcount; 2413 2414 error = feature_get_refcount_from_disk(spa, 2415 &spa_feature_table[i], &refcount); 2416 if (error == 0) { 2417 spa->spa_feat_refcount_cache[i] = refcount; 2418 } else if (error == ENOTSUP) { 2419 spa->spa_feat_refcount_cache[i] = 2420 SPA_FEATURE_DISABLED; 2421 } else { 2422 return (spa_vdev_err(rvd, 2423 VDEV_AUX_CORRUPT_DATA, EIO)); 2424 } 2425 } 2426 } 2427 2428 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { 2429 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, 2430 &spa->spa_feat_enabled_txg_obj) != 0) { 2431 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2432 } 2433 } 2434 2435 spa->spa_is_initializing = B_TRUE; 2436 error = dsl_pool_open(spa->spa_dsl_pool); 2437 spa->spa_is_initializing = B_FALSE; 2438 if (error != 0) 2439 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2440 2441 if (!mosconfig) { 2442 uint64_t hostid; 2443 nvlist_t *policy = NULL, *nvconfig; 2444 2445 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2446 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2447 2448 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, 2449 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2450 char *hostname; 2451 unsigned long myhostid = 0; 2452 2453 VERIFY(nvlist_lookup_string(nvconfig, 2454 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); 2455 2456#ifdef _KERNEL 2457 myhostid = zone_get_hostid(NULL); 2458#else /* _KERNEL */ 2459 /* 2460 * We're emulating the system's hostid in userland, so 2461 * we can't use zone_get_hostid(). 2462 */ 2463 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); 2464#endif /* _KERNEL */ 2465 if (check_hostid && hostid != 0 && myhostid != 0 && 2466 hostid != myhostid) { 2467 nvlist_free(nvconfig); 2468 cmn_err(CE_WARN, "pool '%s' could not be " 2469 "loaded as it was last accessed by " 2470 "another system (host: %s hostid: 0x%lx). " 2471 "See: http://illumos.org/msg/ZFS-8000-EY", 2472 spa_name(spa), hostname, 2473 (unsigned long)hostid); 2474 return (SET_ERROR(EBADF)); 2475 } 2476 } 2477 if (nvlist_lookup_nvlist(spa->spa_config, 2478 ZPOOL_REWIND_POLICY, &policy) == 0) 2479 VERIFY(nvlist_add_nvlist(nvconfig, 2480 ZPOOL_REWIND_POLICY, policy) == 0); 2481 2482 spa_config_set(spa, nvconfig); 2483 spa_unload(spa); 2484 spa_deactivate(spa); 2485 spa_activate(spa, orig_mode); 2486 2487 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); 2488 } 2489 2490 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) 2491 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2492 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 2493 if (error != 0) 2494 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2495 2496 /* 2497 * Load the bit that tells us to use the new accounting function 2498 * (raid-z deflation). If we have an older pool, this will not 2499 * be present. 2500 */ 2501 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); 2502 if (error != 0 && error != ENOENT) 2503 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2504 2505 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 2506 &spa->spa_creation_version); 2507 if (error != 0 && error != ENOENT) 2508 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2509 2510 /* 2511 * Load the persistent error log. If we have an older pool, this will 2512 * not be present. 2513 */ 2514 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); 2515 if (error != 0 && error != ENOENT) 2516 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2517 2518 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 2519 &spa->spa_errlog_scrub); 2520 if (error != 0 && error != ENOENT) 2521 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2522 2523 /* 2524 * Load the history object. If we have an older pool, this 2525 * will not be present. 2526 */ 2527 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); 2528 if (error != 0 && error != ENOENT) 2529 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2530 2531 /* 2532 * If we're assembling the pool from the split-off vdevs of 2533 * an existing pool, we don't want to attach the spares & cache 2534 * devices. 2535 */ 2536 2537 /* 2538 * Load any hot spares for this pool. 2539 */ 2540 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); 2541 if (error != 0 && error != ENOENT) 2542 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2543 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2544 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 2545 if (load_nvlist(spa, spa->spa_spares.sav_object, 2546 &spa->spa_spares.sav_config) != 0) 2547 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2548 2549 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2550 spa_load_spares(spa); 2551 spa_config_exit(spa, SCL_ALL, FTAG); 2552 } else if (error == 0) { 2553 spa->spa_spares.sav_sync = B_TRUE; 2554 } 2555 2556 /* 2557 * Load any level 2 ARC devices for this pool. 2558 */ 2559 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 2560 &spa->spa_l2cache.sav_object); 2561 if (error != 0 && error != ENOENT) 2562 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2563 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2564 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 2565 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 2566 &spa->spa_l2cache.sav_config) != 0) 2567 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2568 2569 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2570 spa_load_l2cache(spa); 2571 spa_config_exit(spa, SCL_ALL, FTAG); 2572 } else if (error == 0) { 2573 spa->spa_l2cache.sav_sync = B_TRUE; 2574 } 2575 2576 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 2577 2578 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); 2579 if (error && error != ENOENT) 2580 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2581 2582 if (error == 0) { 2583 uint64_t autoreplace; 2584 2585 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 2586 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 2587 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 2588 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 2589 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 2590 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 2591 &spa->spa_dedup_ditto); 2592 2593 spa->spa_autoreplace = (autoreplace != 0); 2594 } 2595 2596 /* 2597 * If the 'autoreplace' property is set, then post a resource notifying 2598 * the ZFS DE that it should not issue any faults for unopenable 2599 * devices. We also iterate over the vdevs, and post a sysevent for any 2600 * unopenable vdevs so that the normal autoreplace handler can take 2601 * over. 2602 */ 2603 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { 2604 spa_check_removed(spa->spa_root_vdev); 2605 /* 2606 * For the import case, this is done in spa_import(), because 2607 * at this point we're using the spare definitions from 2608 * the MOS config, not necessarily from the userland config. 2609 */ 2610 if (state != SPA_LOAD_IMPORT) { 2611 spa_aux_check_removed(&spa->spa_spares); 2612 spa_aux_check_removed(&spa->spa_l2cache); 2613 } 2614 } 2615 2616 /* 2617 * Load the vdev state for all toplevel vdevs. 2618 */ 2619 vdev_load(rvd); 2620 2621 /* 2622 * Propagate the leaf DTLs we just loaded all the way up the tree. 2623 */ 2624 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2625 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 2626 spa_config_exit(spa, SCL_ALL, FTAG); 2627 2628 /* 2629 * Load the DDTs (dedup tables). 2630 */ 2631 error = ddt_load(spa); 2632 if (error != 0) 2633 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2634 2635 spa_update_dspace(spa); 2636 2637 /* 2638 * Validate the config, using the MOS config to fill in any 2639 * information which might be missing. If we fail to validate 2640 * the config then declare the pool unfit for use. If we're 2641 * assembling a pool from a split, the log is not transferred 2642 * over. 2643 */ 2644 if (type != SPA_IMPORT_ASSEMBLE) { 2645 nvlist_t *nvconfig; 2646 2647 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2648 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2649 2650 if (!spa_config_valid(spa, nvconfig)) { 2651 nvlist_free(nvconfig); 2652 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 2653 ENXIO)); 2654 } 2655 nvlist_free(nvconfig); 2656 2657 /* 2658 * Now that we've validated the config, check the state of the 2659 * root vdev. If it can't be opened, it indicates one or 2660 * more toplevel vdevs are faulted. 2661 */ 2662 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2663 return (SET_ERROR(ENXIO)); 2664 2665 if (spa_check_logs(spa)) { 2666 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 2667 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); 2668 } 2669 } 2670 2671 if (missing_feat_write) { 2672 ASSERT(state == SPA_LOAD_TRYIMPORT); 2673 2674 /* 2675 * At this point, we know that we can open the pool in 2676 * read-only mode but not read-write mode. We now have enough 2677 * information and can return to userland. 2678 */ 2679 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); 2680 } 2681 2682 /* 2683 * We've successfully opened the pool, verify that we're ready 2684 * to start pushing transactions. 2685 */ 2686 if (state != SPA_LOAD_TRYIMPORT) { 2687 if (error = spa_load_verify(spa)) 2688 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2689 error)); 2690 } 2691 2692 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || 2693 spa->spa_load_max_txg == UINT64_MAX)) { 2694 dmu_tx_t *tx; 2695 int need_update = B_FALSE; 2696 2697 ASSERT(state != SPA_LOAD_TRYIMPORT); 2698 2699 /* 2700 * Claim log blocks that haven't been committed yet. 2701 * This must all happen in a single txg. 2702 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 2703 * invoked from zil_claim_log_block()'s i/o done callback. 2704 * Price of rollback is that we abandon the log. 2705 */ 2706 spa->spa_claiming = B_TRUE; 2707 2708 tx = dmu_tx_create_assigned(spa_get_dsl(spa), 2709 spa_first_txg(spa)); 2710 (void) dmu_objset_find(spa_name(spa), 2711 zil_claim, tx, DS_FIND_CHILDREN); 2712 dmu_tx_commit(tx); 2713 2714 spa->spa_claiming = B_FALSE; 2715 2716 spa_set_log_state(spa, SPA_LOG_GOOD); 2717 spa->spa_sync_on = B_TRUE; 2718 txg_sync_start(spa->spa_dsl_pool); 2719 2720 /* 2721 * Wait for all claims to sync. We sync up to the highest 2722 * claimed log block birth time so that claimed log blocks 2723 * don't appear to be from the future. spa_claim_max_txg 2724 * will have been set for us by either zil_check_log_chain() 2725 * (invoked from spa_check_logs()) or zil_claim() above. 2726 */ 2727 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 2728 2729 /* 2730 * If the config cache is stale, or we have uninitialized 2731 * metaslabs (see spa_vdev_add()), then update the config. 2732 * 2733 * If this is a verbatim import, trust the current 2734 * in-core spa_config and update the disk labels. 2735 */ 2736 if (config_cache_txg != spa->spa_config_txg || 2737 state == SPA_LOAD_IMPORT || 2738 state == SPA_LOAD_RECOVER || 2739 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 2740 need_update = B_TRUE; 2741 2742 for (int c = 0; c < rvd->vdev_children; c++) 2743 if (rvd->vdev_child[c]->vdev_ms_array == 0) 2744 need_update = B_TRUE; 2745 2746 /* 2747 * Update the config cache asychronously in case we're the 2748 * root pool, in which case the config cache isn't writable yet. 2749 */ 2750 if (need_update) 2751 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2752 2753 /* 2754 * Check all DTLs to see if anything needs resilvering. 2755 */ 2756 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 2757 vdev_resilver_needed(rvd, NULL, NULL)) 2758 spa_async_request(spa, SPA_ASYNC_RESILVER); 2759 2760 /* 2761 * Log the fact that we booted up (so that we can detect if 2762 * we rebooted in the middle of an operation). 2763 */ 2764 spa_history_log_version(spa, "open"); 2765 2766 /* 2767 * Delete any inconsistent datasets. 2768 */ 2769 (void) dmu_objset_find(spa_name(spa), 2770 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 2771 2772 /* 2773 * Clean up any stale temporary dataset userrefs. 2774 */ 2775 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 2776 } 2777 2778 return (0); 2779} 2780 2781static int 2782spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) 2783{ 2784 int mode = spa->spa_mode; 2785 2786 spa_unload(spa); 2787 spa_deactivate(spa); 2788 2789 spa->spa_load_max_txg--; 2790 2791 spa_activate(spa, mode); 2792 spa_async_suspend(spa); 2793 2794 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); 2795} 2796 2797/* 2798 * If spa_load() fails this function will try loading prior txg's. If 2799 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 2800 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 2801 * function will not rewind the pool and will return the same error as 2802 * spa_load(). 2803 */ 2804static int 2805spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, 2806 uint64_t max_request, int rewind_flags) 2807{ 2808 nvlist_t *loadinfo = NULL; 2809 nvlist_t *config = NULL; 2810 int load_error, rewind_error; 2811 uint64_t safe_rewind_txg; 2812 uint64_t min_txg; 2813 2814 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 2815 spa->spa_load_max_txg = spa->spa_load_txg; 2816 spa_set_log_state(spa, SPA_LOG_CLEAR); 2817 } else { 2818 spa->spa_load_max_txg = max_request; 2819 } 2820 2821 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, 2822 mosconfig); 2823 if (load_error == 0) 2824 return (0); 2825 2826 if (spa->spa_root_vdev != NULL) 2827 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2828 2829 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 2830 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 2831 2832 if (rewind_flags & ZPOOL_NEVER_REWIND) { 2833 nvlist_free(config); 2834 return (load_error); 2835 } 2836 2837 if (state == SPA_LOAD_RECOVER) { 2838 /* Price of rolling back is discarding txgs, including log */ 2839 spa_set_log_state(spa, SPA_LOG_CLEAR); 2840 } else { 2841 /* 2842 * If we aren't rolling back save the load info from our first 2843 * import attempt so that we can restore it after attempting 2844 * to rewind. 2845 */ 2846 loadinfo = spa->spa_load_info; 2847 spa->spa_load_info = fnvlist_alloc(); 2848 } 2849 2850 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 2851 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 2852 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 2853 TXG_INITIAL : safe_rewind_txg; 2854 2855 /* 2856 * Continue as long as we're finding errors, we're still within 2857 * the acceptable rewind range, and we're still finding uberblocks 2858 */ 2859 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 2860 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 2861 if (spa->spa_load_max_txg < safe_rewind_txg) 2862 spa->spa_extreme_rewind = B_TRUE; 2863 rewind_error = spa_load_retry(spa, state, mosconfig); 2864 } 2865 2866 spa->spa_extreme_rewind = B_FALSE; 2867 spa->spa_load_max_txg = UINT64_MAX; 2868 2869 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 2870 spa_config_set(spa, config); 2871 2872 if (state == SPA_LOAD_RECOVER) { 2873 ASSERT3P(loadinfo, ==, NULL); 2874 return (rewind_error); 2875 } else { 2876 /* Store the rewind info as part of the initial load info */ 2877 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 2878 spa->spa_load_info); 2879 2880 /* Restore the initial load info */ 2881 fnvlist_free(spa->spa_load_info); 2882 spa->spa_load_info = loadinfo; 2883 2884 return (load_error); 2885 } 2886} 2887 2888/* 2889 * Pool Open/Import 2890 * 2891 * The import case is identical to an open except that the configuration is sent 2892 * down from userland, instead of grabbed from the configuration cache. For the 2893 * case of an open, the pool configuration will exist in the 2894 * POOL_STATE_UNINITIALIZED state. 2895 * 2896 * The stats information (gen/count/ustats) is used to gather vdev statistics at 2897 * the same time open the pool, without having to keep around the spa_t in some 2898 * ambiguous state. 2899 */ 2900static int 2901spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 2902 nvlist_t **config) 2903{ 2904 spa_t *spa; 2905 spa_load_state_t state = SPA_LOAD_OPEN; 2906 int error; 2907 int locked = B_FALSE; 2908 int firstopen = B_FALSE; 2909 2910 *spapp = NULL; 2911 2912 /* 2913 * As disgusting as this is, we need to support recursive calls to this 2914 * function because dsl_dir_open() is called during spa_load(), and ends 2915 * up calling spa_open() again. The real fix is to figure out how to 2916 * avoid dsl_dir_open() calling this in the first place. 2917 */ 2918 if (mutex_owner(&spa_namespace_lock) != curthread) { 2919 mutex_enter(&spa_namespace_lock); 2920 locked = B_TRUE; 2921 } 2922 2923 if ((spa = spa_lookup(pool)) == NULL) { 2924 if (locked) 2925 mutex_exit(&spa_namespace_lock); 2926 return (SET_ERROR(ENOENT)); 2927 } 2928 2929 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 2930 zpool_rewind_policy_t policy; 2931 2932 firstopen = B_TRUE; 2933 2934 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, 2935 &policy); 2936 if (policy.zrp_request & ZPOOL_DO_REWIND) 2937 state = SPA_LOAD_RECOVER; 2938 2939 spa_activate(spa, spa_mode_global); 2940 2941 if (state != SPA_LOAD_RECOVER) 2942 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 2943 2944 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, 2945 policy.zrp_request); 2946 2947 if (error == EBADF) { 2948 /* 2949 * If vdev_validate() returns failure (indicated by 2950 * EBADF), it indicates that one of the vdevs indicates 2951 * that the pool has been exported or destroyed. If 2952 * this is the case, the config cache is out of sync and 2953 * we should remove the pool from the namespace. 2954 */ 2955 spa_unload(spa); 2956 spa_deactivate(spa); 2957 spa_config_sync(spa, B_TRUE, B_TRUE); 2958 spa_remove(spa); 2959 if (locked) 2960 mutex_exit(&spa_namespace_lock); 2961 return (SET_ERROR(ENOENT)); 2962 } 2963 2964 if (error) { 2965 /* 2966 * We can't open the pool, but we still have useful 2967 * information: the state of each vdev after the 2968 * attempted vdev_open(). Return this to the user. 2969 */ 2970 if (config != NULL && spa->spa_config) { 2971 VERIFY(nvlist_dup(spa->spa_config, config, 2972 KM_SLEEP) == 0); 2973 VERIFY(nvlist_add_nvlist(*config, 2974 ZPOOL_CONFIG_LOAD_INFO, 2975 spa->spa_load_info) == 0); 2976 } 2977 spa_unload(spa); 2978 spa_deactivate(spa); 2979 spa->spa_last_open_failed = error; 2980 if (locked) 2981 mutex_exit(&spa_namespace_lock); 2982 *spapp = NULL; 2983 return (error); 2984 } 2985 } 2986 2987 spa_open_ref(spa, tag); 2988 2989 if (config != NULL) 2990 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2991 2992 /* 2993 * If we've recovered the pool, pass back any information we 2994 * gathered while doing the load. 2995 */ 2996 if (state == SPA_LOAD_RECOVER) { 2997 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 2998 spa->spa_load_info) == 0); 2999 } 3000 3001 if (locked) { 3002 spa->spa_last_open_failed = 0; 3003 spa->spa_last_ubsync_txg = 0; 3004 spa->spa_load_txg = 0; 3005 mutex_exit(&spa_namespace_lock); 3006#ifdef __FreeBSD__ 3007#ifdef _KERNEL 3008 if (firstopen) 3009 zvol_create_minors(spa->spa_name); 3010#endif 3011#endif 3012 } 3013 3014 *spapp = spa; 3015 3016 return (0); 3017} 3018 3019int 3020spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 3021 nvlist_t **config) 3022{ 3023 return (spa_open_common(name, spapp, tag, policy, config)); 3024} 3025 3026int 3027spa_open(const char *name, spa_t **spapp, void *tag) 3028{ 3029 return (spa_open_common(name, spapp, tag, NULL, NULL)); 3030} 3031 3032/* 3033 * Lookup the given spa_t, incrementing the inject count in the process, 3034 * preventing it from being exported or destroyed. 3035 */ 3036spa_t * 3037spa_inject_addref(char *name) 3038{ 3039 spa_t *spa; 3040 3041 mutex_enter(&spa_namespace_lock); 3042 if ((spa = spa_lookup(name)) == NULL) { 3043 mutex_exit(&spa_namespace_lock); 3044 return (NULL); 3045 } 3046 spa->spa_inject_ref++; 3047 mutex_exit(&spa_namespace_lock); 3048 3049 return (spa); 3050} 3051 3052void 3053spa_inject_delref(spa_t *spa) 3054{ 3055 mutex_enter(&spa_namespace_lock); 3056 spa->spa_inject_ref--; 3057 mutex_exit(&spa_namespace_lock); 3058} 3059 3060/* 3061 * Add spares device information to the nvlist. 3062 */ 3063static void 3064spa_add_spares(spa_t *spa, nvlist_t *config) 3065{ 3066 nvlist_t **spares; 3067 uint_t i, nspares; 3068 nvlist_t *nvroot; 3069 uint64_t guid; 3070 vdev_stat_t *vs; 3071 uint_t vsc; 3072 uint64_t pool; 3073 3074 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3075 3076 if (spa->spa_spares.sav_count == 0) 3077 return; 3078 3079 VERIFY(nvlist_lookup_nvlist(config, 3080 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3081 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 3082 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3083 if (nspares != 0) { 3084 VERIFY(nvlist_add_nvlist_array(nvroot, 3085 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3086 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3087 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3088 3089 /* 3090 * Go through and find any spares which have since been 3091 * repurposed as an active spare. If this is the case, update 3092 * their status appropriately. 3093 */ 3094 for (i = 0; i < nspares; i++) { 3095 VERIFY(nvlist_lookup_uint64(spares[i], 3096 ZPOOL_CONFIG_GUID, &guid) == 0); 3097 if (spa_spare_exists(guid, &pool, NULL) && 3098 pool != 0ULL) { 3099 VERIFY(nvlist_lookup_uint64_array( 3100 spares[i], ZPOOL_CONFIG_VDEV_STATS, 3101 (uint64_t **)&vs, &vsc) == 0); 3102 vs->vs_state = VDEV_STATE_CANT_OPEN; 3103 vs->vs_aux = VDEV_AUX_SPARED; 3104 } 3105 } 3106 } 3107} 3108 3109/* 3110 * Add l2cache device information to the nvlist, including vdev stats. 3111 */ 3112static void 3113spa_add_l2cache(spa_t *spa, nvlist_t *config) 3114{ 3115 nvlist_t **l2cache; 3116 uint_t i, j, nl2cache; 3117 nvlist_t *nvroot; 3118 uint64_t guid; 3119 vdev_t *vd; 3120 vdev_stat_t *vs; 3121 uint_t vsc; 3122 3123 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3124 3125 if (spa->spa_l2cache.sav_count == 0) 3126 return; 3127 3128 VERIFY(nvlist_lookup_nvlist(config, 3129 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3130 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 3131 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3132 if (nl2cache != 0) { 3133 VERIFY(nvlist_add_nvlist_array(nvroot, 3134 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3135 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3136 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3137 3138 /* 3139 * Update level 2 cache device stats. 3140 */ 3141 3142 for (i = 0; i < nl2cache; i++) { 3143 VERIFY(nvlist_lookup_uint64(l2cache[i], 3144 ZPOOL_CONFIG_GUID, &guid) == 0); 3145 3146 vd = NULL; 3147 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 3148 if (guid == 3149 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 3150 vd = spa->spa_l2cache.sav_vdevs[j]; 3151 break; 3152 } 3153 } 3154 ASSERT(vd != NULL); 3155 3156 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 3157 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 3158 == 0); 3159 vdev_get_stats(vd, vs); 3160 } 3161 } 3162} 3163 3164static void 3165spa_add_feature_stats(spa_t *spa, nvlist_t *config) 3166{ 3167 nvlist_t *features; 3168 zap_cursor_t zc; 3169 zap_attribute_t za; 3170 3171 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3172 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3173 3174 /* We may be unable to read features if pool is suspended. */ 3175 if (spa_suspended(spa)) 3176 goto out; 3177 3178 if (spa->spa_feat_for_read_obj != 0) { 3179 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3180 spa->spa_feat_for_read_obj); 3181 zap_cursor_retrieve(&zc, &za) == 0; 3182 zap_cursor_advance(&zc)) { 3183 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3184 za.za_num_integers == 1); 3185 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3186 za.za_first_integer)); 3187 } 3188 zap_cursor_fini(&zc); 3189 } 3190 3191 if (spa->spa_feat_for_write_obj != 0) { 3192 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3193 spa->spa_feat_for_write_obj); 3194 zap_cursor_retrieve(&zc, &za) == 0; 3195 zap_cursor_advance(&zc)) { 3196 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3197 za.za_num_integers == 1); 3198 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3199 za.za_first_integer)); 3200 } 3201 zap_cursor_fini(&zc); 3202 } 3203 3204out: 3205 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 3206 features) == 0); 3207 nvlist_free(features); 3208} 3209 3210int 3211spa_get_stats(const char *name, nvlist_t **config, 3212 char *altroot, size_t buflen) 3213{ 3214 int error; 3215 spa_t *spa; 3216 3217 *config = NULL; 3218 error = spa_open_common(name, &spa, FTAG, NULL, config); 3219 3220 if (spa != NULL) { 3221 /* 3222 * This still leaves a window of inconsistency where the spares 3223 * or l2cache devices could change and the config would be 3224 * self-inconsistent. 3225 */ 3226 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3227 3228 if (*config != NULL) { 3229 uint64_t loadtimes[2]; 3230 3231 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 3232 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 3233 VERIFY(nvlist_add_uint64_array(*config, 3234 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 3235 3236 VERIFY(nvlist_add_uint64(*config, 3237 ZPOOL_CONFIG_ERRCOUNT, 3238 spa_get_errlog_size(spa)) == 0); 3239 3240 if (spa_suspended(spa)) 3241 VERIFY(nvlist_add_uint64(*config, 3242 ZPOOL_CONFIG_SUSPENDED, 3243 spa->spa_failmode) == 0); 3244 3245 spa_add_spares(spa, *config); 3246 spa_add_l2cache(spa, *config); 3247 spa_add_feature_stats(spa, *config); 3248 } 3249 } 3250 3251 /* 3252 * We want to get the alternate root even for faulted pools, so we cheat 3253 * and call spa_lookup() directly. 3254 */ 3255 if (altroot) { 3256 if (spa == NULL) { 3257 mutex_enter(&spa_namespace_lock); 3258 spa = spa_lookup(name); 3259 if (spa) 3260 spa_altroot(spa, altroot, buflen); 3261 else 3262 altroot[0] = '\0'; 3263 spa = NULL; 3264 mutex_exit(&spa_namespace_lock); 3265 } else { 3266 spa_altroot(spa, altroot, buflen); 3267 } 3268 } 3269 3270 if (spa != NULL) { 3271 spa_config_exit(spa, SCL_CONFIG, FTAG); 3272 spa_close(spa, FTAG); 3273 } 3274 3275 return (error); 3276} 3277 3278/* 3279 * Validate that the auxiliary device array is well formed. We must have an 3280 * array of nvlists, each which describes a valid leaf vdev. If this is an 3281 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 3282 * specified, as long as they are well-formed. 3283 */ 3284static int 3285spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 3286 spa_aux_vdev_t *sav, const char *config, uint64_t version, 3287 vdev_labeltype_t label) 3288{ 3289 nvlist_t **dev; 3290 uint_t i, ndev; 3291 vdev_t *vd; 3292 int error; 3293 3294 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3295 3296 /* 3297 * It's acceptable to have no devs specified. 3298 */ 3299 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 3300 return (0); 3301 3302 if (ndev == 0) 3303 return (SET_ERROR(EINVAL)); 3304 3305 /* 3306 * Make sure the pool is formatted with a version that supports this 3307 * device type. 3308 */ 3309 if (spa_version(spa) < version) 3310 return (SET_ERROR(ENOTSUP)); 3311 3312 /* 3313 * Set the pending device list so we correctly handle device in-use 3314 * checking. 3315 */ 3316 sav->sav_pending = dev; 3317 sav->sav_npending = ndev; 3318 3319 for (i = 0; i < ndev; i++) { 3320 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 3321 mode)) != 0) 3322 goto out; 3323 3324 if (!vd->vdev_ops->vdev_op_leaf) { 3325 vdev_free(vd); 3326 error = SET_ERROR(EINVAL); 3327 goto out; 3328 } 3329 3330 /* 3331 * The L2ARC currently only supports disk devices in 3332 * kernel context. For user-level testing, we allow it. 3333 */ 3334#ifdef _KERNEL 3335 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && 3336 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { 3337 error = SET_ERROR(ENOTBLK); 3338 vdev_free(vd); 3339 goto out; 3340 } 3341#endif 3342 vd->vdev_top = vd; 3343 3344 if ((error = vdev_open(vd)) == 0 && 3345 (error = vdev_label_init(vd, crtxg, label)) == 0) { 3346 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 3347 vd->vdev_guid) == 0); 3348 } 3349 3350 vdev_free(vd); 3351 3352 if (error && 3353 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 3354 goto out; 3355 else 3356 error = 0; 3357 } 3358 3359out: 3360 sav->sav_pending = NULL; 3361 sav->sav_npending = 0; 3362 return (error); 3363} 3364 3365static int 3366spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 3367{ 3368 int error; 3369 3370 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3371 3372 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3373 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 3374 VDEV_LABEL_SPARE)) != 0) { 3375 return (error); 3376 } 3377 3378 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3379 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 3380 VDEV_LABEL_L2CACHE)); 3381} 3382 3383static void 3384spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 3385 const char *config) 3386{ 3387 int i; 3388 3389 if (sav->sav_config != NULL) { 3390 nvlist_t **olddevs; 3391 uint_t oldndevs; 3392 nvlist_t **newdevs; 3393 3394 /* 3395 * Generate new dev list by concatentating with the 3396 * current dev list. 3397 */ 3398 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 3399 &olddevs, &oldndevs) == 0); 3400 3401 newdevs = kmem_alloc(sizeof (void *) * 3402 (ndevs + oldndevs), KM_SLEEP); 3403 for (i = 0; i < oldndevs; i++) 3404 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 3405 KM_SLEEP) == 0); 3406 for (i = 0; i < ndevs; i++) 3407 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 3408 KM_SLEEP) == 0); 3409 3410 VERIFY(nvlist_remove(sav->sav_config, config, 3411 DATA_TYPE_NVLIST_ARRAY) == 0); 3412 3413 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 3414 config, newdevs, ndevs + oldndevs) == 0); 3415 for (i = 0; i < oldndevs + ndevs; i++) 3416 nvlist_free(newdevs[i]); 3417 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 3418 } else { 3419 /* 3420 * Generate a new dev list. 3421 */ 3422 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 3423 KM_SLEEP) == 0); 3424 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 3425 devs, ndevs) == 0); 3426 } 3427} 3428 3429/* 3430 * Stop and drop level 2 ARC devices 3431 */ 3432void 3433spa_l2cache_drop(spa_t *spa) 3434{ 3435 vdev_t *vd; 3436 int i; 3437 spa_aux_vdev_t *sav = &spa->spa_l2cache; 3438 3439 for (i = 0; i < sav->sav_count; i++) { 3440 uint64_t pool; 3441 3442 vd = sav->sav_vdevs[i]; 3443 ASSERT(vd != NULL); 3444 3445 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 3446 pool != 0ULL && l2arc_vdev_present(vd)) 3447 l2arc_remove_vdev(vd); 3448 } 3449} 3450 3451/* 3452 * Pool Creation 3453 */ 3454int 3455spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 3456 nvlist_t *zplprops) 3457{ 3458 spa_t *spa; 3459 char *altroot = NULL; 3460 vdev_t *rvd; 3461 dsl_pool_t *dp; 3462 dmu_tx_t *tx; 3463 int error = 0; 3464 uint64_t txg = TXG_INITIAL; 3465 nvlist_t **spares, **l2cache; 3466 uint_t nspares, nl2cache; 3467 uint64_t version, obj; 3468 boolean_t has_features; 3469 3470 /* 3471 * If this pool already exists, return failure. 3472 */ 3473 mutex_enter(&spa_namespace_lock); 3474 if (spa_lookup(pool) != NULL) { 3475 mutex_exit(&spa_namespace_lock); 3476 return (SET_ERROR(EEXIST)); 3477 } 3478 3479 /* 3480 * Allocate a new spa_t structure. 3481 */ 3482 (void) nvlist_lookup_string(props, 3483 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3484 spa = spa_add(pool, NULL, altroot); 3485 spa_activate(spa, spa_mode_global); 3486 3487 if (props && (error = spa_prop_validate(spa, props))) { 3488 spa_deactivate(spa); 3489 spa_remove(spa); 3490 mutex_exit(&spa_namespace_lock); 3491 return (error); 3492 } 3493 3494 has_features = B_FALSE; 3495 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 3496 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 3497 if (zpool_prop_feature(nvpair_name(elem))) 3498 has_features = B_TRUE; 3499 } 3500 3501 if (has_features || nvlist_lookup_uint64(props, 3502 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 3503 version = SPA_VERSION; 3504 } 3505 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 3506 3507 spa->spa_first_txg = txg; 3508 spa->spa_uberblock.ub_txg = txg - 1; 3509 spa->spa_uberblock.ub_version = version; 3510 spa->spa_ubsync = spa->spa_uberblock; 3511 3512 /* 3513 * Create "The Godfather" zio to hold all async IOs 3514 */ 3515 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 3516 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 3517 3518 /* 3519 * Create the root vdev. 3520 */ 3521 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3522 3523 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 3524 3525 ASSERT(error != 0 || rvd != NULL); 3526 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 3527 3528 if (error == 0 && !zfs_allocatable_devs(nvroot)) 3529 error = SET_ERROR(EINVAL); 3530 3531 if (error == 0 && 3532 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 3533 (error = spa_validate_aux(spa, nvroot, txg, 3534 VDEV_ALLOC_ADD)) == 0) { 3535 for (int c = 0; c < rvd->vdev_children; c++) { 3536 vdev_ashift_optimize(rvd->vdev_child[c]); 3537 vdev_metaslab_set_size(rvd->vdev_child[c]); 3538 vdev_expand(rvd->vdev_child[c], txg); 3539 } 3540 } 3541 3542 spa_config_exit(spa, SCL_ALL, FTAG); 3543 3544 if (error != 0) { 3545 spa_unload(spa); 3546 spa_deactivate(spa); 3547 spa_remove(spa); 3548 mutex_exit(&spa_namespace_lock); 3549 return (error); 3550 } 3551 3552 /* 3553 * Get the list of spares, if specified. 3554 */ 3555 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3556 &spares, &nspares) == 0) { 3557 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 3558 KM_SLEEP) == 0); 3559 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3560 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3561 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3562 spa_load_spares(spa); 3563 spa_config_exit(spa, SCL_ALL, FTAG); 3564 spa->spa_spares.sav_sync = B_TRUE; 3565 } 3566 3567 /* 3568 * Get the list of level 2 cache devices, if specified. 3569 */ 3570 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3571 &l2cache, &nl2cache) == 0) { 3572 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3573 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3574 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3575 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3576 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3577 spa_load_l2cache(spa); 3578 spa_config_exit(spa, SCL_ALL, FTAG); 3579 spa->spa_l2cache.sav_sync = B_TRUE; 3580 } 3581 3582 spa->spa_is_initializing = B_TRUE; 3583 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); 3584 spa->spa_meta_objset = dp->dp_meta_objset; 3585 spa->spa_is_initializing = B_FALSE; 3586 3587 /* 3588 * Create DDTs (dedup tables). 3589 */ 3590 ddt_create(spa); 3591 3592 spa_update_dspace(spa); 3593 3594 tx = dmu_tx_create_assigned(dp, txg); 3595 3596 /* 3597 * Create the pool config object. 3598 */ 3599 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 3600 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 3601 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 3602 3603 if (zap_add(spa->spa_meta_objset, 3604 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 3605 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 3606 cmn_err(CE_PANIC, "failed to add pool config"); 3607 } 3608 3609 if (spa_version(spa) >= SPA_VERSION_FEATURES) 3610 spa_feature_create_zap_objects(spa, tx); 3611 3612 if (zap_add(spa->spa_meta_objset, 3613 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 3614 sizeof (uint64_t), 1, &version, tx) != 0) { 3615 cmn_err(CE_PANIC, "failed to add pool version"); 3616 } 3617 3618 /* Newly created pools with the right version are always deflated. */ 3619 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 3620 spa->spa_deflate = TRUE; 3621 if (zap_add(spa->spa_meta_objset, 3622 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 3623 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 3624 cmn_err(CE_PANIC, "failed to add deflate"); 3625 } 3626 } 3627 3628 /* 3629 * Create the deferred-free bpobj. Turn off compression 3630 * because sync-to-convergence takes longer if the blocksize 3631 * keeps changing. 3632 */ 3633 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 3634 dmu_object_set_compress(spa->spa_meta_objset, obj, 3635 ZIO_COMPRESS_OFF, tx); 3636 if (zap_add(spa->spa_meta_objset, 3637 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 3638 sizeof (uint64_t), 1, &obj, tx) != 0) { 3639 cmn_err(CE_PANIC, "failed to add bpobj"); 3640 } 3641 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 3642 spa->spa_meta_objset, obj)); 3643 3644 /* 3645 * Create the pool's history object. 3646 */ 3647 if (version >= SPA_VERSION_ZPOOL_HISTORY) 3648 spa_history_create_obj(spa, tx); 3649 3650 /* 3651 * Set pool properties. 3652 */ 3653 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 3654 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3655 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 3656 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 3657 3658 if (props != NULL) { 3659 spa_configfile_set(spa, props, B_FALSE); 3660 spa_sync_props(props, tx); 3661 } 3662 3663 dmu_tx_commit(tx); 3664 3665 spa->spa_sync_on = B_TRUE; 3666 txg_sync_start(spa->spa_dsl_pool); 3667 3668 /* 3669 * We explicitly wait for the first transaction to complete so that our 3670 * bean counters are appropriately updated. 3671 */ 3672 txg_wait_synced(spa->spa_dsl_pool, txg); 3673 3674 spa_config_sync(spa, B_FALSE, B_TRUE); 3675 3676 spa_history_log_version(spa, "create"); 3677 3678 spa->spa_minref = refcount_count(&spa->spa_refcount); 3679 3680 mutex_exit(&spa_namespace_lock); 3681 3682 return (0); 3683} 3684 3685#ifdef _KERNEL 3686#if defined(sun) 3687/* 3688 * Get the root pool information from the root disk, then import the root pool 3689 * during the system boot up time. 3690 */ 3691extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 3692 3693static nvlist_t * 3694spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 3695{ 3696 nvlist_t *config; 3697 nvlist_t *nvtop, *nvroot; 3698 uint64_t pgid; 3699 3700 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 3701 return (NULL); 3702 3703 /* 3704 * Add this top-level vdev to the child array. 3705 */ 3706 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3707 &nvtop) == 0); 3708 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3709 &pgid) == 0); 3710 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 3711 3712 /* 3713 * Put this pool's top-level vdevs into a root vdev. 3714 */ 3715 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3716 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3717 VDEV_TYPE_ROOT) == 0); 3718 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3719 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3720 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3721 &nvtop, 1) == 0); 3722 3723 /* 3724 * Replace the existing vdev_tree with the new root vdev in 3725 * this pool's configuration (remove the old, add the new). 3726 */ 3727 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3728 nvlist_free(nvroot); 3729 return (config); 3730} 3731 3732/* 3733 * Walk the vdev tree and see if we can find a device with "better" 3734 * configuration. A configuration is "better" if the label on that 3735 * device has a more recent txg. 3736 */ 3737static void 3738spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 3739{ 3740 for (int c = 0; c < vd->vdev_children; c++) 3741 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 3742 3743 if (vd->vdev_ops->vdev_op_leaf) { 3744 nvlist_t *label; 3745 uint64_t label_txg; 3746 3747 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 3748 &label) != 0) 3749 return; 3750 3751 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 3752 &label_txg) == 0); 3753 3754 /* 3755 * Do we have a better boot device? 3756 */ 3757 if (label_txg > *txg) { 3758 *txg = label_txg; 3759 *avd = vd; 3760 } 3761 nvlist_free(label); 3762 } 3763} 3764 3765/* 3766 * Import a root pool. 3767 * 3768 * For x86. devpath_list will consist of devid and/or physpath name of 3769 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 3770 * The GRUB "findroot" command will return the vdev we should boot. 3771 * 3772 * For Sparc, devpath_list consists the physpath name of the booting device 3773 * no matter the rootpool is a single device pool or a mirrored pool. 3774 * e.g. 3775 * "/pci@1f,0/ide@d/disk@0,0:a" 3776 */ 3777int 3778spa_import_rootpool(char *devpath, char *devid) 3779{ 3780 spa_t *spa; 3781 vdev_t *rvd, *bvd, *avd = NULL; 3782 nvlist_t *config, *nvtop; 3783 uint64_t guid, txg; 3784 char *pname; 3785 int error; 3786 3787 /* 3788 * Read the label from the boot device and generate a configuration. 3789 */ 3790 config = spa_generate_rootconf(devpath, devid, &guid); 3791#if defined(_OBP) && defined(_KERNEL) 3792 if (config == NULL) { 3793 if (strstr(devpath, "/iscsi/ssd") != NULL) { 3794 /* iscsi boot */ 3795 get_iscsi_bootpath_phy(devpath); 3796 config = spa_generate_rootconf(devpath, devid, &guid); 3797 } 3798 } 3799#endif 3800 if (config == NULL) { 3801 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 3802 devpath); 3803 return (SET_ERROR(EIO)); 3804 } 3805 3806 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 3807 &pname) == 0); 3808 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 3809 3810 mutex_enter(&spa_namespace_lock); 3811 if ((spa = spa_lookup(pname)) != NULL) { 3812 /* 3813 * Remove the existing root pool from the namespace so that we 3814 * can replace it with the correct config we just read in. 3815 */ 3816 spa_remove(spa); 3817 } 3818 3819 spa = spa_add(pname, config, NULL); 3820 spa->spa_is_root = B_TRUE; 3821 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 3822 3823 /* 3824 * Build up a vdev tree based on the boot device's label config. 3825 */ 3826 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3827 &nvtop) == 0); 3828 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3829 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 3830 VDEV_ALLOC_ROOTPOOL); 3831 spa_config_exit(spa, SCL_ALL, FTAG); 3832 if (error) { 3833 mutex_exit(&spa_namespace_lock); 3834 nvlist_free(config); 3835 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 3836 pname); 3837 return (error); 3838 } 3839 3840 /* 3841 * Get the boot vdev. 3842 */ 3843 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 3844 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 3845 (u_longlong_t)guid); 3846 error = SET_ERROR(ENOENT); 3847 goto out; 3848 } 3849 3850 /* 3851 * Determine if there is a better boot device. 3852 */ 3853 avd = bvd; 3854 spa_alt_rootvdev(rvd, &avd, &txg); 3855 if (avd != bvd) { 3856 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 3857 "try booting from '%s'", avd->vdev_path); 3858 error = SET_ERROR(EINVAL); 3859 goto out; 3860 } 3861 3862 /* 3863 * If the boot device is part of a spare vdev then ensure that 3864 * we're booting off the active spare. 3865 */ 3866 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 3867 !bvd->vdev_isspare) { 3868 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 3869 "try booting from '%s'", 3870 bvd->vdev_parent-> 3871 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 3872 error = SET_ERROR(EINVAL); 3873 goto out; 3874 } 3875 3876 error = 0; 3877out: 3878 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3879 vdev_free(rvd); 3880 spa_config_exit(spa, SCL_ALL, FTAG); 3881 mutex_exit(&spa_namespace_lock); 3882 3883 nvlist_free(config); 3884 return (error); 3885} 3886 3887#else 3888 3889extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs, 3890 uint64_t *count); 3891 3892static nvlist_t * 3893spa_generate_rootconf(const char *name) 3894{ 3895 nvlist_t **configs, **tops; 3896 nvlist_t *config; 3897 nvlist_t *best_cfg, *nvtop, *nvroot; 3898 uint64_t *holes; 3899 uint64_t best_txg; 3900 uint64_t nchildren; 3901 uint64_t pgid; 3902 uint64_t count; 3903 uint64_t i; 3904 uint_t nholes; 3905 3906 if (vdev_geom_read_pool_label(name, &configs, &count) != 0) 3907 return (NULL); 3908 3909 ASSERT3U(count, !=, 0); 3910 best_txg = 0; 3911 for (i = 0; i < count; i++) { 3912 uint64_t txg; 3913 3914 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG, 3915 &txg) == 0); 3916 if (txg > best_txg) { 3917 best_txg = txg; 3918 best_cfg = configs[i]; 3919 } 3920 } 3921 3922 /* 3923 * Multi-vdev root pool configuration discovery is not supported yet. 3924 */ 3925 nchildren = 1; 3926 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren); 3927 holes = NULL; 3928 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY, 3929 &holes, &nholes); 3930 3931 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP); 3932 for (i = 0; i < nchildren; i++) { 3933 if (i >= count) 3934 break; 3935 if (configs[i] == NULL) 3936 continue; 3937 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE, 3938 &nvtop) == 0); 3939 nvlist_dup(nvtop, &tops[i], KM_SLEEP); 3940 } 3941 for (i = 0; holes != NULL && i < nholes; i++) { 3942 if (i >= nchildren) 3943 continue; 3944 if (tops[holes[i]] != NULL) 3945 continue; 3946 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP); 3947 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE, 3948 VDEV_TYPE_HOLE) == 0); 3949 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, 3950 holes[i]) == 0); 3951 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 3952 0) == 0); 3953 } 3954 for (i = 0; i < nchildren; i++) { 3955 if (tops[i] != NULL) 3956 continue; 3957 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP); 3958 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE, 3959 VDEV_TYPE_MISSING) == 0); 3960 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, 3961 i) == 0); 3962 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 3963 0) == 0); 3964 } 3965 3966 /* 3967 * Create pool config based on the best vdev config. 3968 */ 3969 nvlist_dup(best_cfg, &config, KM_SLEEP); 3970 3971 /* 3972 * Put this pool's top-level vdevs into a root vdev. 3973 */ 3974 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3975 &pgid) == 0); 3976 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3977 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3978 VDEV_TYPE_ROOT) == 0); 3979 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3980 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3981 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3982 tops, nchildren) == 0); 3983 3984 /* 3985 * Replace the existing vdev_tree with the new root vdev in 3986 * this pool's configuration (remove the old, add the new). 3987 */ 3988 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3989 3990 /* 3991 * Drop vdev config elements that should not be present at pool level. 3992 */ 3993 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64); 3994 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64); 3995 3996 for (i = 0; i < count; i++) 3997 nvlist_free(configs[i]); 3998 kmem_free(configs, count * sizeof(void *)); 3999 for (i = 0; i < nchildren; i++) 4000 nvlist_free(tops[i]); 4001 kmem_free(tops, nchildren * sizeof(void *)); 4002 nvlist_free(nvroot); 4003 return (config); 4004} 4005 4006int 4007spa_import_rootpool(const char *name) 4008{ 4009 spa_t *spa; 4010 vdev_t *rvd, *bvd, *avd = NULL; 4011 nvlist_t *config, *nvtop; 4012 uint64_t txg; 4013 char *pname; 4014 int error; 4015 4016 /* 4017 * Read the label from the boot device and generate a configuration. 4018 */ 4019 config = spa_generate_rootconf(name); 4020 4021 mutex_enter(&spa_namespace_lock); 4022 if (config != NULL) { 4023 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 4024 &pname) == 0 && strcmp(name, pname) == 0); 4025 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) 4026 == 0); 4027 4028 if ((spa = spa_lookup(pname)) != NULL) { 4029 /* 4030 * Remove the existing root pool from the namespace so 4031 * that we can replace it with the correct config 4032 * we just read in. 4033 */ 4034 spa_remove(spa); 4035 } 4036 spa = spa_add(pname, config, NULL); 4037 4038 /* 4039 * Set spa_ubsync.ub_version as it can be used in vdev_alloc() 4040 * via spa_version(). 4041 */ 4042 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 4043 &spa->spa_ubsync.ub_version) != 0) 4044 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 4045 } else if ((spa = spa_lookup(name)) == NULL) { 4046 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'", 4047 name); 4048 return (EIO); 4049 } else { 4050 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0); 4051 } 4052 spa->spa_is_root = B_TRUE; 4053 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 4054 4055 /* 4056 * Build up a vdev tree based on the boot device's label config. 4057 */ 4058 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4059 &nvtop) == 0); 4060 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4061 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 4062 VDEV_ALLOC_ROOTPOOL); 4063 spa_config_exit(spa, SCL_ALL, FTAG); 4064 if (error) { 4065 mutex_exit(&spa_namespace_lock); 4066 nvlist_free(config); 4067 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 4068 pname); 4069 return (error); 4070 } 4071 4072 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4073 vdev_free(rvd); 4074 spa_config_exit(spa, SCL_ALL, FTAG); 4075 mutex_exit(&spa_namespace_lock); 4076 4077 nvlist_free(config); 4078 return (0); 4079} 4080 4081#endif /* sun */ 4082#endif 4083 4084/* 4085 * Import a non-root pool into the system. 4086 */ 4087int 4088spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 4089{ 4090 spa_t *spa; 4091 char *altroot = NULL; 4092 spa_load_state_t state = SPA_LOAD_IMPORT; 4093 zpool_rewind_policy_t policy; 4094 uint64_t mode = spa_mode_global; 4095 uint64_t readonly = B_FALSE; 4096 int error; 4097 nvlist_t *nvroot; 4098 nvlist_t **spares, **l2cache; 4099 uint_t nspares, nl2cache; 4100 4101 /* 4102 * If a pool with this name exists, return failure. 4103 */ 4104 mutex_enter(&spa_namespace_lock); 4105 if (spa_lookup(pool) != NULL) { 4106 mutex_exit(&spa_namespace_lock); 4107 return (SET_ERROR(EEXIST)); 4108 } 4109 4110 /* 4111 * Create and initialize the spa structure. 4112 */ 4113 (void) nvlist_lookup_string(props, 4114 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 4115 (void) nvlist_lookup_uint64(props, 4116 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 4117 if (readonly) 4118 mode = FREAD; 4119 spa = spa_add(pool, config, altroot); 4120 spa->spa_import_flags = flags; 4121 4122 /* 4123 * Verbatim import - Take a pool and insert it into the namespace 4124 * as if it had been loaded at boot. 4125 */ 4126 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 4127 if (props != NULL) 4128 spa_configfile_set(spa, props, B_FALSE); 4129 4130 spa_config_sync(spa, B_FALSE, B_TRUE); 4131 4132 mutex_exit(&spa_namespace_lock); 4133 return (0); 4134 } 4135 4136 spa_activate(spa, mode); 4137 4138 /* 4139 * Don't start async tasks until we know everything is healthy. 4140 */ 4141 spa_async_suspend(spa); 4142 4143 zpool_get_rewind_policy(config, &policy); 4144 if (policy.zrp_request & ZPOOL_DO_REWIND) 4145 state = SPA_LOAD_RECOVER; 4146 4147 /* 4148 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig 4149 * because the user-supplied config is actually the one to trust when 4150 * doing an import. 4151 */ 4152 if (state != SPA_LOAD_RECOVER) 4153 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 4154 4155 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, 4156 policy.zrp_request); 4157 4158 /* 4159 * Propagate anything learned while loading the pool and pass it 4160 * back to caller (i.e. rewind info, missing devices, etc). 4161 */ 4162 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4163 spa->spa_load_info) == 0); 4164 4165 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4166 /* 4167 * Toss any existing sparelist, as it doesn't have any validity 4168 * anymore, and conflicts with spa_has_spare(). 4169 */ 4170 if (spa->spa_spares.sav_config) { 4171 nvlist_free(spa->spa_spares.sav_config); 4172 spa->spa_spares.sav_config = NULL; 4173 spa_load_spares(spa); 4174 } 4175 if (spa->spa_l2cache.sav_config) { 4176 nvlist_free(spa->spa_l2cache.sav_config); 4177 spa->spa_l2cache.sav_config = NULL; 4178 spa_load_l2cache(spa); 4179 } 4180 4181 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4182 &nvroot) == 0); 4183 if (error == 0) 4184 error = spa_validate_aux(spa, nvroot, -1ULL, 4185 VDEV_ALLOC_SPARE); 4186 if (error == 0) 4187 error = spa_validate_aux(spa, nvroot, -1ULL, 4188 VDEV_ALLOC_L2CACHE); 4189 spa_config_exit(spa, SCL_ALL, FTAG); 4190 4191 if (props != NULL) 4192 spa_configfile_set(spa, props, B_FALSE); 4193 4194 if (error != 0 || (props && spa_writeable(spa) && 4195 (error = spa_prop_set(spa, props)))) { 4196 spa_unload(spa); 4197 spa_deactivate(spa); 4198 spa_remove(spa); 4199 mutex_exit(&spa_namespace_lock); 4200 return (error); 4201 } 4202 4203 spa_async_resume(spa); 4204 4205 /* 4206 * Override any spares and level 2 cache devices as specified by 4207 * the user, as these may have correct device names/devids, etc. 4208 */ 4209 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 4210 &spares, &nspares) == 0) { 4211 if (spa->spa_spares.sav_config) 4212 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 4213 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 4214 else 4215 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 4216 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4217 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 4218 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 4219 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4220 spa_load_spares(spa); 4221 spa_config_exit(spa, SCL_ALL, FTAG); 4222 spa->spa_spares.sav_sync = B_TRUE; 4223 } 4224 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 4225 &l2cache, &nl2cache) == 0) { 4226 if (spa->spa_l2cache.sav_config) 4227 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 4228 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 4229 else 4230 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 4231 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4232 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 4233 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 4234 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4235 spa_load_l2cache(spa); 4236 spa_config_exit(spa, SCL_ALL, FTAG); 4237 spa->spa_l2cache.sav_sync = B_TRUE; 4238 } 4239 4240 /* 4241 * Check for any removed devices. 4242 */ 4243 if (spa->spa_autoreplace) { 4244 spa_aux_check_removed(&spa->spa_spares); 4245 spa_aux_check_removed(&spa->spa_l2cache); 4246 } 4247 4248 if (spa_writeable(spa)) { 4249 /* 4250 * Update the config cache to include the newly-imported pool. 4251 */ 4252 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4253 } 4254 4255 /* 4256 * It's possible that the pool was expanded while it was exported. 4257 * We kick off an async task to handle this for us. 4258 */ 4259 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 4260 4261 mutex_exit(&spa_namespace_lock); 4262 spa_history_log_version(spa, "import"); 4263 4264#ifdef __FreeBSD__ 4265#ifdef _KERNEL 4266 zvol_create_minors(pool); 4267#endif 4268#endif 4269 return (0); 4270} 4271 4272nvlist_t * 4273spa_tryimport(nvlist_t *tryconfig) 4274{ 4275 nvlist_t *config = NULL; 4276 char *poolname; 4277 spa_t *spa; 4278 uint64_t state; 4279 int error; 4280 4281 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 4282 return (NULL); 4283 4284 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 4285 return (NULL); 4286 4287 /* 4288 * Create and initialize the spa structure. 4289 */ 4290 mutex_enter(&spa_namespace_lock); 4291 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 4292 spa_activate(spa, FREAD); 4293 4294 /* 4295 * Pass off the heavy lifting to spa_load(). 4296 * Pass TRUE for mosconfig because the user-supplied config 4297 * is actually the one to trust when doing an import. 4298 */ 4299 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); 4300 4301 /* 4302 * If 'tryconfig' was at least parsable, return the current config. 4303 */ 4304 if (spa->spa_root_vdev != NULL) { 4305 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4306 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 4307 poolname) == 0); 4308 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 4309 state) == 0); 4310 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 4311 spa->spa_uberblock.ub_timestamp) == 0); 4312 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4313 spa->spa_load_info) == 0); 4314 4315 /* 4316 * If the bootfs property exists on this pool then we 4317 * copy it out so that external consumers can tell which 4318 * pools are bootable. 4319 */ 4320 if ((!error || error == EEXIST) && spa->spa_bootfs) { 4321 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4322 4323 /* 4324 * We have to play games with the name since the 4325 * pool was opened as TRYIMPORT_NAME. 4326 */ 4327 if (dsl_dsobj_to_dsname(spa_name(spa), 4328 spa->spa_bootfs, tmpname) == 0) { 4329 char *cp; 4330 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4331 4332 cp = strchr(tmpname, '/'); 4333 if (cp == NULL) { 4334 (void) strlcpy(dsname, tmpname, 4335 MAXPATHLEN); 4336 } else { 4337 (void) snprintf(dsname, MAXPATHLEN, 4338 "%s/%s", poolname, ++cp); 4339 } 4340 VERIFY(nvlist_add_string(config, 4341 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 4342 kmem_free(dsname, MAXPATHLEN); 4343 } 4344 kmem_free(tmpname, MAXPATHLEN); 4345 } 4346 4347 /* 4348 * Add the list of hot spares and level 2 cache devices. 4349 */ 4350 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4351 spa_add_spares(spa, config); 4352 spa_add_l2cache(spa, config); 4353 spa_config_exit(spa, SCL_CONFIG, FTAG); 4354 } 4355 4356 spa_unload(spa); 4357 spa_deactivate(spa); 4358 spa_remove(spa); 4359 mutex_exit(&spa_namespace_lock); 4360 4361 return (config); 4362} 4363 4364/* 4365 * Pool export/destroy 4366 * 4367 * The act of destroying or exporting a pool is very simple. We make sure there 4368 * is no more pending I/O and any references to the pool are gone. Then, we 4369 * update the pool state and sync all the labels to disk, removing the 4370 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 4371 * we don't sync the labels or remove the configuration cache. 4372 */ 4373static int 4374spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 4375 boolean_t force, boolean_t hardforce) 4376{ 4377 spa_t *spa; 4378 4379 if (oldconfig) 4380 *oldconfig = NULL; 4381 4382 if (!(spa_mode_global & FWRITE)) 4383 return (SET_ERROR(EROFS)); 4384 4385 mutex_enter(&spa_namespace_lock); 4386 if ((spa = spa_lookup(pool)) == NULL) { 4387 mutex_exit(&spa_namespace_lock); 4388 return (SET_ERROR(ENOENT)); 4389 } 4390 4391 /* 4392 * Put a hold on the pool, drop the namespace lock, stop async tasks, 4393 * reacquire the namespace lock, and see if we can export. 4394 */ 4395 spa_open_ref(spa, FTAG); 4396 mutex_exit(&spa_namespace_lock); 4397 spa_async_suspend(spa); 4398 mutex_enter(&spa_namespace_lock); 4399 spa_close(spa, FTAG); 4400 4401 /* 4402 * The pool will be in core if it's openable, 4403 * in which case we can modify its state. 4404 */ 4405 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 4406 /* 4407 * Objsets may be open only because they're dirty, so we 4408 * have to force it to sync before checking spa_refcnt. 4409 */ 4410 txg_wait_synced(spa->spa_dsl_pool, 0); 4411 4412 /* 4413 * A pool cannot be exported or destroyed if there are active 4414 * references. If we are resetting a pool, allow references by 4415 * fault injection handlers. 4416 */ 4417 if (!spa_refcount_zero(spa) || 4418 (spa->spa_inject_ref != 0 && 4419 new_state != POOL_STATE_UNINITIALIZED)) { 4420 spa_async_resume(spa); 4421 mutex_exit(&spa_namespace_lock); 4422 return (SET_ERROR(EBUSY)); 4423 } 4424 4425 /* 4426 * A pool cannot be exported if it has an active shared spare. 4427 * This is to prevent other pools stealing the active spare 4428 * from an exported pool. At user's own will, such pool can 4429 * be forcedly exported. 4430 */ 4431 if (!force && new_state == POOL_STATE_EXPORTED && 4432 spa_has_active_shared_spare(spa)) { 4433 spa_async_resume(spa); 4434 mutex_exit(&spa_namespace_lock); 4435 return (SET_ERROR(EXDEV)); 4436 } 4437 4438 /* 4439 * We want this to be reflected on every label, 4440 * so mark them all dirty. spa_unload() will do the 4441 * final sync that pushes these changes out. 4442 */ 4443 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 4444 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4445 spa->spa_state = new_state; 4446 spa->spa_final_txg = spa_last_synced_txg(spa) + 4447 TXG_DEFER_SIZE + 1; 4448 vdev_config_dirty(spa->spa_root_vdev); 4449 spa_config_exit(spa, SCL_ALL, FTAG); 4450 } 4451 } 4452 4453 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY); 4454 4455 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 4456 spa_unload(spa); 4457 spa_deactivate(spa); 4458 } 4459 4460 if (oldconfig && spa->spa_config) 4461 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 4462 4463 if (new_state != POOL_STATE_UNINITIALIZED) { 4464 if (!hardforce) 4465 spa_config_sync(spa, B_TRUE, B_TRUE); 4466 spa_remove(spa); 4467 } 4468 mutex_exit(&spa_namespace_lock); 4469 4470 return (0); 4471} 4472 4473/* 4474 * Destroy a storage pool. 4475 */ 4476int 4477spa_destroy(char *pool) 4478{ 4479 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 4480 B_FALSE, B_FALSE)); 4481} 4482 4483/* 4484 * Export a storage pool. 4485 */ 4486int 4487spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 4488 boolean_t hardforce) 4489{ 4490 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 4491 force, hardforce)); 4492} 4493 4494/* 4495 * Similar to spa_export(), this unloads the spa_t without actually removing it 4496 * from the namespace in any way. 4497 */ 4498int 4499spa_reset(char *pool) 4500{ 4501 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 4502 B_FALSE, B_FALSE)); 4503} 4504 4505/* 4506 * ========================================================================== 4507 * Device manipulation 4508 * ========================================================================== 4509 */ 4510 4511/* 4512 * Add a device to a storage pool. 4513 */ 4514int 4515spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 4516{ 4517 uint64_t txg, id; 4518 int error; 4519 vdev_t *rvd = spa->spa_root_vdev; 4520 vdev_t *vd, *tvd; 4521 nvlist_t **spares, **l2cache; 4522 uint_t nspares, nl2cache; 4523 4524 ASSERT(spa_writeable(spa)); 4525 4526 txg = spa_vdev_enter(spa); 4527 4528 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 4529 VDEV_ALLOC_ADD)) != 0) 4530 return (spa_vdev_exit(spa, NULL, txg, error)); 4531 4532 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 4533 4534 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 4535 &nspares) != 0) 4536 nspares = 0; 4537 4538 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 4539 &nl2cache) != 0) 4540 nl2cache = 0; 4541 4542 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 4543 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 4544 4545 if (vd->vdev_children != 0 && 4546 (error = vdev_create(vd, txg, B_FALSE)) != 0) 4547 return (spa_vdev_exit(spa, vd, txg, error)); 4548 4549 /* 4550 * We must validate the spares and l2cache devices after checking the 4551 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 4552 */ 4553 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 4554 return (spa_vdev_exit(spa, vd, txg, error)); 4555 4556 /* 4557 * Transfer each new top-level vdev from vd to rvd. 4558 */ 4559 for (int c = 0; c < vd->vdev_children; c++) { 4560 4561 /* 4562 * Set the vdev id to the first hole, if one exists. 4563 */ 4564 for (id = 0; id < rvd->vdev_children; id++) { 4565 if (rvd->vdev_child[id]->vdev_ishole) { 4566 vdev_free(rvd->vdev_child[id]); 4567 break; 4568 } 4569 } 4570 tvd = vd->vdev_child[c]; 4571 vdev_remove_child(vd, tvd); 4572 tvd->vdev_id = id; 4573 vdev_add_child(rvd, tvd); 4574 vdev_config_dirty(tvd); 4575 } 4576 4577 if (nspares != 0) { 4578 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 4579 ZPOOL_CONFIG_SPARES); 4580 spa_load_spares(spa); 4581 spa->spa_spares.sav_sync = B_TRUE; 4582 } 4583 4584 if (nl2cache != 0) { 4585 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 4586 ZPOOL_CONFIG_L2CACHE); 4587 spa_load_l2cache(spa); 4588 spa->spa_l2cache.sav_sync = B_TRUE; 4589 } 4590 4591 /* 4592 * We have to be careful when adding new vdevs to an existing pool. 4593 * If other threads start allocating from these vdevs before we 4594 * sync the config cache, and we lose power, then upon reboot we may 4595 * fail to open the pool because there are DVAs that the config cache 4596 * can't translate. Therefore, we first add the vdevs without 4597 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 4598 * and then let spa_config_update() initialize the new metaslabs. 4599 * 4600 * spa_load() checks for added-but-not-initialized vdevs, so that 4601 * if we lose power at any point in this sequence, the remaining 4602 * steps will be completed the next time we load the pool. 4603 */ 4604 (void) spa_vdev_exit(spa, vd, txg, 0); 4605 4606 mutex_enter(&spa_namespace_lock); 4607 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4608 mutex_exit(&spa_namespace_lock); 4609 4610 return (0); 4611} 4612 4613/* 4614 * Attach a device to a mirror. The arguments are the path to any device 4615 * in the mirror, and the nvroot for the new device. If the path specifies 4616 * a device that is not mirrored, we automatically insert the mirror vdev. 4617 * 4618 * If 'replacing' is specified, the new device is intended to replace the 4619 * existing device; in this case the two devices are made into their own 4620 * mirror using the 'replacing' vdev, which is functionally identical to 4621 * the mirror vdev (it actually reuses all the same ops) but has a few 4622 * extra rules: you can't attach to it after it's been created, and upon 4623 * completion of resilvering, the first disk (the one being replaced) 4624 * is automatically detached. 4625 */ 4626int 4627spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 4628{ 4629 uint64_t txg, dtl_max_txg; 4630 vdev_t *rvd = spa->spa_root_vdev; 4631 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 4632 vdev_ops_t *pvops; 4633 char *oldvdpath, *newvdpath; 4634 int newvd_isspare; 4635 int error; 4636 4637 ASSERT(spa_writeable(spa)); 4638 4639 txg = spa_vdev_enter(spa); 4640 4641 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 4642 4643 if (oldvd == NULL) 4644 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4645 4646 if (!oldvd->vdev_ops->vdev_op_leaf) 4647 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4648 4649 pvd = oldvd->vdev_parent; 4650 4651 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 4652 VDEV_ALLOC_ATTACH)) != 0) 4653 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4654 4655 if (newrootvd->vdev_children != 1) 4656 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4657 4658 newvd = newrootvd->vdev_child[0]; 4659 4660 if (!newvd->vdev_ops->vdev_op_leaf) 4661 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4662 4663 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 4664 return (spa_vdev_exit(spa, newrootvd, txg, error)); 4665 4666 /* 4667 * Spares can't replace logs 4668 */ 4669 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 4670 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4671 4672 if (!replacing) { 4673 /* 4674 * For attach, the only allowable parent is a mirror or the root 4675 * vdev. 4676 */ 4677 if (pvd->vdev_ops != &vdev_mirror_ops && 4678 pvd->vdev_ops != &vdev_root_ops) 4679 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4680 4681 pvops = &vdev_mirror_ops; 4682 } else { 4683 /* 4684 * Active hot spares can only be replaced by inactive hot 4685 * spares. 4686 */ 4687 if (pvd->vdev_ops == &vdev_spare_ops && 4688 oldvd->vdev_isspare && 4689 !spa_has_spare(spa, newvd->vdev_guid)) 4690 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4691 4692 /* 4693 * If the source is a hot spare, and the parent isn't already a 4694 * spare, then we want to create a new hot spare. Otherwise, we 4695 * want to create a replacing vdev. The user is not allowed to 4696 * attach to a spared vdev child unless the 'isspare' state is 4697 * the same (spare replaces spare, non-spare replaces 4698 * non-spare). 4699 */ 4700 if (pvd->vdev_ops == &vdev_replacing_ops && 4701 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 4702 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4703 } else if (pvd->vdev_ops == &vdev_spare_ops && 4704 newvd->vdev_isspare != oldvd->vdev_isspare) { 4705 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4706 } 4707 4708 if (newvd->vdev_isspare) 4709 pvops = &vdev_spare_ops; 4710 else 4711 pvops = &vdev_replacing_ops; 4712 } 4713 4714 /* 4715 * Make sure the new device is big enough. 4716 */ 4717 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 4718 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 4719 4720 /* 4721 * The new device cannot have a higher alignment requirement 4722 * than the top-level vdev. 4723 */ 4724 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 4725 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 4726 4727 /* 4728 * If this is an in-place replacement, update oldvd's path and devid 4729 * to make it distinguishable from newvd, and unopenable from now on. 4730 */ 4731 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 4732 spa_strfree(oldvd->vdev_path); 4733 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 4734 KM_SLEEP); 4735 (void) sprintf(oldvd->vdev_path, "%s/%s", 4736 newvd->vdev_path, "old"); 4737 if (oldvd->vdev_devid != NULL) { 4738 spa_strfree(oldvd->vdev_devid); 4739 oldvd->vdev_devid = NULL; 4740 } 4741 } 4742 4743 /* mark the device being resilvered */ 4744 newvd->vdev_resilver_txg = txg; 4745 4746 /* 4747 * If the parent is not a mirror, or if we're replacing, insert the new 4748 * mirror/replacing/spare vdev above oldvd. 4749 */ 4750 if (pvd->vdev_ops != pvops) 4751 pvd = vdev_add_parent(oldvd, pvops); 4752 4753 ASSERT(pvd->vdev_top->vdev_parent == rvd); 4754 ASSERT(pvd->vdev_ops == pvops); 4755 ASSERT(oldvd->vdev_parent == pvd); 4756 4757 /* 4758 * Extract the new device from its root and add it to pvd. 4759 */ 4760 vdev_remove_child(newrootvd, newvd); 4761 newvd->vdev_id = pvd->vdev_children; 4762 newvd->vdev_crtxg = oldvd->vdev_crtxg; 4763 vdev_add_child(pvd, newvd); 4764 4765 tvd = newvd->vdev_top; 4766 ASSERT(pvd->vdev_top == tvd); 4767 ASSERT(tvd->vdev_parent == rvd); 4768 4769 vdev_config_dirty(tvd); 4770 4771 /* 4772 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 4773 * for any dmu_sync-ed blocks. It will propagate upward when 4774 * spa_vdev_exit() calls vdev_dtl_reassess(). 4775 */ 4776 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 4777 4778 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 4779 dtl_max_txg - TXG_INITIAL); 4780 4781 if (newvd->vdev_isspare) { 4782 spa_spare_activate(newvd); 4783 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE); 4784 } 4785 4786 oldvdpath = spa_strdup(oldvd->vdev_path); 4787 newvdpath = spa_strdup(newvd->vdev_path); 4788 newvd_isspare = newvd->vdev_isspare; 4789 4790 /* 4791 * Mark newvd's DTL dirty in this txg. 4792 */ 4793 vdev_dirty(tvd, VDD_DTL, newvd, txg); 4794 4795 /* 4796 * Schedule the resilver to restart in the future. We do this to 4797 * ensure that dmu_sync-ed blocks have been stitched into the 4798 * respective datasets. 4799 */ 4800 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); 4801 4802 /* 4803 * Commit the config 4804 */ 4805 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 4806 4807 spa_history_log_internal(spa, "vdev attach", NULL, 4808 "%s vdev=%s %s vdev=%s", 4809 replacing && newvd_isspare ? "spare in" : 4810 replacing ? "replace" : "attach", newvdpath, 4811 replacing ? "for" : "to", oldvdpath); 4812 4813 spa_strfree(oldvdpath); 4814 spa_strfree(newvdpath); 4815 4816 if (spa->spa_bootfs) 4817 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH); 4818 4819 return (0); 4820} 4821 4822/* 4823 * Detach a device from a mirror or replacing vdev. 4824 * 4825 * If 'replace_done' is specified, only detach if the parent 4826 * is a replacing vdev. 4827 */ 4828int 4829spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 4830{ 4831 uint64_t txg; 4832 int error; 4833 vdev_t *rvd = spa->spa_root_vdev; 4834 vdev_t *vd, *pvd, *cvd, *tvd; 4835 boolean_t unspare = B_FALSE; 4836 uint64_t unspare_guid = 0; 4837 char *vdpath; 4838 4839 ASSERT(spa_writeable(spa)); 4840 4841 txg = spa_vdev_enter(spa); 4842 4843 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 4844 4845 if (vd == NULL) 4846 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4847 4848 if (!vd->vdev_ops->vdev_op_leaf) 4849 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4850 4851 pvd = vd->vdev_parent; 4852 4853 /* 4854 * If the parent/child relationship is not as expected, don't do it. 4855 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 4856 * vdev that's replacing B with C. The user's intent in replacing 4857 * is to go from M(A,B) to M(A,C). If the user decides to cancel 4858 * the replace by detaching C, the expected behavior is to end up 4859 * M(A,B). But suppose that right after deciding to detach C, 4860 * the replacement of B completes. We would have M(A,C), and then 4861 * ask to detach C, which would leave us with just A -- not what 4862 * the user wanted. To prevent this, we make sure that the 4863 * parent/child relationship hasn't changed -- in this example, 4864 * that C's parent is still the replacing vdev R. 4865 */ 4866 if (pvd->vdev_guid != pguid && pguid != 0) 4867 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4868 4869 /* 4870 * Only 'replacing' or 'spare' vdevs can be replaced. 4871 */ 4872 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 4873 pvd->vdev_ops != &vdev_spare_ops) 4874 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4875 4876 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 4877 spa_version(spa) >= SPA_VERSION_SPARES); 4878 4879 /* 4880 * Only mirror, replacing, and spare vdevs support detach. 4881 */ 4882 if (pvd->vdev_ops != &vdev_replacing_ops && 4883 pvd->vdev_ops != &vdev_mirror_ops && 4884 pvd->vdev_ops != &vdev_spare_ops) 4885 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4886 4887 /* 4888 * If this device has the only valid copy of some data, 4889 * we cannot safely detach it. 4890 */ 4891 if (vdev_dtl_required(vd)) 4892 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4893 4894 ASSERT(pvd->vdev_children >= 2); 4895 4896 /* 4897 * If we are detaching the second disk from a replacing vdev, then 4898 * check to see if we changed the original vdev's path to have "/old" 4899 * at the end in spa_vdev_attach(). If so, undo that change now. 4900 */ 4901 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 4902 vd->vdev_path != NULL) { 4903 size_t len = strlen(vd->vdev_path); 4904 4905 for (int c = 0; c < pvd->vdev_children; c++) { 4906 cvd = pvd->vdev_child[c]; 4907 4908 if (cvd == vd || cvd->vdev_path == NULL) 4909 continue; 4910 4911 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 4912 strcmp(cvd->vdev_path + len, "/old") == 0) { 4913 spa_strfree(cvd->vdev_path); 4914 cvd->vdev_path = spa_strdup(vd->vdev_path); 4915 break; 4916 } 4917 } 4918 } 4919 4920 /* 4921 * If we are detaching the original disk from a spare, then it implies 4922 * that the spare should become a real disk, and be removed from the 4923 * active spare list for the pool. 4924 */ 4925 if (pvd->vdev_ops == &vdev_spare_ops && 4926 vd->vdev_id == 0 && 4927 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 4928 unspare = B_TRUE; 4929 4930 /* 4931 * Erase the disk labels so the disk can be used for other things. 4932 * This must be done after all other error cases are handled, 4933 * but before we disembowel vd (so we can still do I/O to it). 4934 * But if we can't do it, don't treat the error as fatal -- 4935 * it may be that the unwritability of the disk is the reason 4936 * it's being detached! 4937 */ 4938 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 4939 4940 /* 4941 * Remove vd from its parent and compact the parent's children. 4942 */ 4943 vdev_remove_child(pvd, vd); 4944 vdev_compact_children(pvd); 4945 4946 /* 4947 * Remember one of the remaining children so we can get tvd below. 4948 */ 4949 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 4950 4951 /* 4952 * If we need to remove the remaining child from the list of hot spares, 4953 * do it now, marking the vdev as no longer a spare in the process. 4954 * We must do this before vdev_remove_parent(), because that can 4955 * change the GUID if it creates a new toplevel GUID. For a similar 4956 * reason, we must remove the spare now, in the same txg as the detach; 4957 * otherwise someone could attach a new sibling, change the GUID, and 4958 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 4959 */ 4960 if (unspare) { 4961 ASSERT(cvd->vdev_isspare); 4962 spa_spare_remove(cvd); 4963 unspare_guid = cvd->vdev_guid; 4964 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 4965 cvd->vdev_unspare = B_TRUE; 4966 } 4967 4968 /* 4969 * If the parent mirror/replacing vdev only has one child, 4970 * the parent is no longer needed. Remove it from the tree. 4971 */ 4972 if (pvd->vdev_children == 1) { 4973 if (pvd->vdev_ops == &vdev_spare_ops) 4974 cvd->vdev_unspare = B_FALSE; 4975 vdev_remove_parent(cvd); 4976 } 4977 4978 4979 /* 4980 * We don't set tvd until now because the parent we just removed 4981 * may have been the previous top-level vdev. 4982 */ 4983 tvd = cvd->vdev_top; 4984 ASSERT(tvd->vdev_parent == rvd); 4985 4986 /* 4987 * Reevaluate the parent vdev state. 4988 */ 4989 vdev_propagate_state(cvd); 4990 4991 /* 4992 * If the 'autoexpand' property is set on the pool then automatically 4993 * try to expand the size of the pool. For example if the device we 4994 * just detached was smaller than the others, it may be possible to 4995 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 4996 * first so that we can obtain the updated sizes of the leaf vdevs. 4997 */ 4998 if (spa->spa_autoexpand) { 4999 vdev_reopen(tvd); 5000 vdev_expand(tvd, txg); 5001 } 5002 5003 vdev_config_dirty(tvd); 5004 5005 /* 5006 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 5007 * vd->vdev_detached is set and free vd's DTL object in syncing context. 5008 * But first make sure we're not on any *other* txg's DTL list, to 5009 * prevent vd from being accessed after it's freed. 5010 */ 5011 vdpath = spa_strdup(vd->vdev_path); 5012 for (int t = 0; t < TXG_SIZE; t++) 5013 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 5014 vd->vdev_detached = B_TRUE; 5015 vdev_dirty(tvd, VDD_DTL, vd, txg); 5016 5017 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE); 5018 5019 /* hang on to the spa before we release the lock */ 5020 spa_open_ref(spa, FTAG); 5021 5022 error = spa_vdev_exit(spa, vd, txg, 0); 5023 5024 spa_history_log_internal(spa, "detach", NULL, 5025 "vdev=%s", vdpath); 5026 spa_strfree(vdpath); 5027 5028 /* 5029 * If this was the removal of the original device in a hot spare vdev, 5030 * then we want to go through and remove the device from the hot spare 5031 * list of every other pool. 5032 */ 5033 if (unspare) { 5034 spa_t *altspa = NULL; 5035 5036 mutex_enter(&spa_namespace_lock); 5037 while ((altspa = spa_next(altspa)) != NULL) { 5038 if (altspa->spa_state != POOL_STATE_ACTIVE || 5039 altspa == spa) 5040 continue; 5041 5042 spa_open_ref(altspa, FTAG); 5043 mutex_exit(&spa_namespace_lock); 5044 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 5045 mutex_enter(&spa_namespace_lock); 5046 spa_close(altspa, FTAG); 5047 } 5048 mutex_exit(&spa_namespace_lock); 5049 5050 /* search the rest of the vdevs for spares to remove */ 5051 spa_vdev_resilver_done(spa); 5052 } 5053 5054 /* all done with the spa; OK to release */ 5055 mutex_enter(&spa_namespace_lock); 5056 spa_close(spa, FTAG); 5057 mutex_exit(&spa_namespace_lock); 5058 5059 return (error); 5060} 5061 5062/* 5063 * Split a set of devices from their mirrors, and create a new pool from them. 5064 */ 5065int 5066spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 5067 nvlist_t *props, boolean_t exp) 5068{ 5069 int error = 0; 5070 uint64_t txg, *glist; 5071 spa_t *newspa; 5072 uint_t c, children, lastlog; 5073 nvlist_t **child, *nvl, *tmp; 5074 dmu_tx_t *tx; 5075 char *altroot = NULL; 5076 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 5077 boolean_t activate_slog; 5078 5079 ASSERT(spa_writeable(spa)); 5080 5081 txg = spa_vdev_enter(spa); 5082 5083 /* clear the log and flush everything up to now */ 5084 activate_slog = spa_passivate_log(spa); 5085 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5086 error = spa_offline_log(spa); 5087 txg = spa_vdev_config_enter(spa); 5088 5089 if (activate_slog) 5090 spa_activate_log(spa); 5091 5092 if (error != 0) 5093 return (spa_vdev_exit(spa, NULL, txg, error)); 5094 5095 /* check new spa name before going any further */ 5096 if (spa_lookup(newname) != NULL) 5097 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 5098 5099 /* 5100 * scan through all the children to ensure they're all mirrors 5101 */ 5102 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 5103 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 5104 &children) != 0) 5105 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5106 5107 /* first, check to ensure we've got the right child count */ 5108 rvd = spa->spa_root_vdev; 5109 lastlog = 0; 5110 for (c = 0; c < rvd->vdev_children; c++) { 5111 vdev_t *vd = rvd->vdev_child[c]; 5112 5113 /* don't count the holes & logs as children */ 5114 if (vd->vdev_islog || vd->vdev_ishole) { 5115 if (lastlog == 0) 5116 lastlog = c; 5117 continue; 5118 } 5119 5120 lastlog = 0; 5121 } 5122 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 5123 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5124 5125 /* next, ensure no spare or cache devices are part of the split */ 5126 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 5127 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 5128 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5129 5130 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 5131 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 5132 5133 /* then, loop over each vdev and validate it */ 5134 for (c = 0; c < children; c++) { 5135 uint64_t is_hole = 0; 5136 5137 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 5138 &is_hole); 5139 5140 if (is_hole != 0) { 5141 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 5142 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 5143 continue; 5144 } else { 5145 error = SET_ERROR(EINVAL); 5146 break; 5147 } 5148 } 5149 5150 /* which disk is going to be split? */ 5151 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 5152 &glist[c]) != 0) { 5153 error = SET_ERROR(EINVAL); 5154 break; 5155 } 5156 5157 /* look it up in the spa */ 5158 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 5159 if (vml[c] == NULL) { 5160 error = SET_ERROR(ENODEV); 5161 break; 5162 } 5163 5164 /* make sure there's nothing stopping the split */ 5165 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 5166 vml[c]->vdev_islog || 5167 vml[c]->vdev_ishole || 5168 vml[c]->vdev_isspare || 5169 vml[c]->vdev_isl2cache || 5170 !vdev_writeable(vml[c]) || 5171 vml[c]->vdev_children != 0 || 5172 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 5173 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 5174 error = SET_ERROR(EINVAL); 5175 break; 5176 } 5177 5178 if (vdev_dtl_required(vml[c])) { 5179 error = SET_ERROR(EBUSY); 5180 break; 5181 } 5182 5183 /* we need certain info from the top level */ 5184 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 5185 vml[c]->vdev_top->vdev_ms_array) == 0); 5186 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 5187 vml[c]->vdev_top->vdev_ms_shift) == 0); 5188 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 5189 vml[c]->vdev_top->vdev_asize) == 0); 5190 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 5191 vml[c]->vdev_top->vdev_ashift) == 0); 5192 } 5193 5194 if (error != 0) { 5195 kmem_free(vml, children * sizeof (vdev_t *)); 5196 kmem_free(glist, children * sizeof (uint64_t)); 5197 return (spa_vdev_exit(spa, NULL, txg, error)); 5198 } 5199 5200 /* stop writers from using the disks */ 5201 for (c = 0; c < children; c++) { 5202 if (vml[c] != NULL) 5203 vml[c]->vdev_offline = B_TRUE; 5204 } 5205 vdev_reopen(spa->spa_root_vdev); 5206 5207 /* 5208 * Temporarily record the splitting vdevs in the spa config. This 5209 * will disappear once the config is regenerated. 5210 */ 5211 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5212 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 5213 glist, children) == 0); 5214 kmem_free(glist, children * sizeof (uint64_t)); 5215 5216 mutex_enter(&spa->spa_props_lock); 5217 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 5218 nvl) == 0); 5219 mutex_exit(&spa->spa_props_lock); 5220 spa->spa_config_splitting = nvl; 5221 vdev_config_dirty(spa->spa_root_vdev); 5222 5223 /* configure and create the new pool */ 5224 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 5225 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 5226 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 5227 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 5228 spa_version(spa)) == 0); 5229 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 5230 spa->spa_config_txg) == 0); 5231 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 5232 spa_generate_guid(NULL)) == 0); 5233 (void) nvlist_lookup_string(props, 5234 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5235 5236 /* add the new pool to the namespace */ 5237 newspa = spa_add(newname, config, altroot); 5238 newspa->spa_config_txg = spa->spa_config_txg; 5239 spa_set_log_state(newspa, SPA_LOG_CLEAR); 5240 5241 /* release the spa config lock, retaining the namespace lock */ 5242 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5243 5244 if (zio_injection_enabled) 5245 zio_handle_panic_injection(spa, FTAG, 1); 5246 5247 spa_activate(newspa, spa_mode_global); 5248 spa_async_suspend(newspa); 5249 5250#ifndef sun 5251 /* mark that we are creating new spa by splitting */ 5252 newspa->spa_splitting_newspa = B_TRUE; 5253#endif 5254 /* create the new pool from the disks of the original pool */ 5255 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); 5256#ifndef sun 5257 newspa->spa_splitting_newspa = B_FALSE; 5258#endif 5259 if (error) 5260 goto out; 5261 5262 /* if that worked, generate a real config for the new pool */ 5263 if (newspa->spa_root_vdev != NULL) { 5264 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 5265 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5266 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 5267 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 5268 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 5269 B_TRUE)); 5270 } 5271 5272 /* set the props */ 5273 if (props != NULL) { 5274 spa_configfile_set(newspa, props, B_FALSE); 5275 error = spa_prop_set(newspa, props); 5276 if (error) 5277 goto out; 5278 } 5279 5280 /* flush everything */ 5281 txg = spa_vdev_config_enter(newspa); 5282 vdev_config_dirty(newspa->spa_root_vdev); 5283 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 5284 5285 if (zio_injection_enabled) 5286 zio_handle_panic_injection(spa, FTAG, 2); 5287 5288 spa_async_resume(newspa); 5289 5290 /* finally, update the original pool's config */ 5291 txg = spa_vdev_config_enter(spa); 5292 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 5293 error = dmu_tx_assign(tx, TXG_WAIT); 5294 if (error != 0) 5295 dmu_tx_abort(tx); 5296 for (c = 0; c < children; c++) { 5297 if (vml[c] != NULL) { 5298 vdev_split(vml[c]); 5299 if (error == 0) 5300 spa_history_log_internal(spa, "detach", tx, 5301 "vdev=%s", vml[c]->vdev_path); 5302 vdev_free(vml[c]); 5303 } 5304 } 5305 vdev_config_dirty(spa->spa_root_vdev); 5306 spa->spa_config_splitting = NULL; 5307 nvlist_free(nvl); 5308 if (error == 0) 5309 dmu_tx_commit(tx); 5310 (void) spa_vdev_exit(spa, NULL, txg, 0); 5311 5312 if (zio_injection_enabled) 5313 zio_handle_panic_injection(spa, FTAG, 3); 5314 5315 /* split is complete; log a history record */ 5316 spa_history_log_internal(newspa, "split", NULL, 5317 "from pool %s", spa_name(spa)); 5318 5319 kmem_free(vml, children * sizeof (vdev_t *)); 5320 5321 /* if we're not going to mount the filesystems in userland, export */ 5322 if (exp) 5323 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 5324 B_FALSE, B_FALSE); 5325 5326 return (error); 5327 5328out: 5329 spa_unload(newspa); 5330 spa_deactivate(newspa); 5331 spa_remove(newspa); 5332 5333 txg = spa_vdev_config_enter(spa); 5334 5335 /* re-online all offlined disks */ 5336 for (c = 0; c < children; c++) { 5337 if (vml[c] != NULL) 5338 vml[c]->vdev_offline = B_FALSE; 5339 } 5340 vdev_reopen(spa->spa_root_vdev); 5341 5342 nvlist_free(spa->spa_config_splitting); 5343 spa->spa_config_splitting = NULL; 5344 (void) spa_vdev_exit(spa, NULL, txg, error); 5345 5346 kmem_free(vml, children * sizeof (vdev_t *)); 5347 return (error); 5348} 5349 5350static nvlist_t * 5351spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) 5352{ 5353 for (int i = 0; i < count; i++) { 5354 uint64_t guid; 5355 5356 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, 5357 &guid) == 0); 5358 5359 if (guid == target_guid) 5360 return (nvpp[i]); 5361 } 5362 5363 return (NULL); 5364} 5365 5366static void 5367spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, 5368 nvlist_t *dev_to_remove) 5369{ 5370 nvlist_t **newdev = NULL; 5371 5372 if (count > 1) 5373 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); 5374 5375 for (int i = 0, j = 0; i < count; i++) { 5376 if (dev[i] == dev_to_remove) 5377 continue; 5378 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); 5379 } 5380 5381 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); 5382 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); 5383 5384 for (int i = 0; i < count - 1; i++) 5385 nvlist_free(newdev[i]); 5386 5387 if (count > 1) 5388 kmem_free(newdev, (count - 1) * sizeof (void *)); 5389} 5390 5391/* 5392 * Evacuate the device. 5393 */ 5394static int 5395spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) 5396{ 5397 uint64_t txg; 5398 int error = 0; 5399 5400 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5401 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5402 ASSERT(vd == vd->vdev_top); 5403 5404 /* 5405 * Evacuate the device. We don't hold the config lock as writer 5406 * since we need to do I/O but we do keep the 5407 * spa_namespace_lock held. Once this completes the device 5408 * should no longer have any blocks allocated on it. 5409 */ 5410 if (vd->vdev_islog) { 5411 if (vd->vdev_stat.vs_alloc != 0) 5412 error = spa_offline_log(spa); 5413 } else { 5414 error = SET_ERROR(ENOTSUP); 5415 } 5416 5417 if (error) 5418 return (error); 5419 5420 /* 5421 * The evacuation succeeded. Remove any remaining MOS metadata 5422 * associated with this vdev, and wait for these changes to sync. 5423 */ 5424 ASSERT0(vd->vdev_stat.vs_alloc); 5425 txg = spa_vdev_config_enter(spa); 5426 vd->vdev_removing = B_TRUE; 5427 vdev_dirty_leaves(vd, VDD_DTL, txg); 5428 vdev_config_dirty(vd); 5429 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5430 5431 return (0); 5432} 5433 5434/* 5435 * Complete the removal by cleaning up the namespace. 5436 */ 5437static void 5438spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd) 5439{ 5440 vdev_t *rvd = spa->spa_root_vdev; 5441 uint64_t id = vd->vdev_id; 5442 boolean_t last_vdev = (id == (rvd->vdev_children - 1)); 5443 5444 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5445 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 5446 ASSERT(vd == vd->vdev_top); 5447 5448 /* 5449 * Only remove any devices which are empty. 5450 */ 5451 if (vd->vdev_stat.vs_alloc != 0) 5452 return; 5453 5454 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 5455 5456 if (list_link_active(&vd->vdev_state_dirty_node)) 5457 vdev_state_clean(vd); 5458 if (list_link_active(&vd->vdev_config_dirty_node)) 5459 vdev_config_clean(vd); 5460 5461 vdev_free(vd); 5462 5463 if (last_vdev) { 5464 vdev_compact_children(rvd); 5465 } else { 5466 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); 5467 vdev_add_child(rvd, vd); 5468 } 5469 vdev_config_dirty(rvd); 5470 5471 /* 5472 * Reassess the health of our root vdev. 5473 */ 5474 vdev_reopen(rvd); 5475} 5476 5477/* 5478 * Remove a device from the pool - 5479 * 5480 * Removing a device from the vdev namespace requires several steps 5481 * and can take a significant amount of time. As a result we use 5482 * the spa_vdev_config_[enter/exit] functions which allow us to 5483 * grab and release the spa_config_lock while still holding the namespace 5484 * lock. During each step the configuration is synced out. 5485 * 5486 * Currently, this supports removing only hot spares, slogs, and level 2 ARC 5487 * devices. 5488 */ 5489int 5490spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) 5491{ 5492 vdev_t *vd; 5493 metaslab_group_t *mg; 5494 nvlist_t **spares, **l2cache, *nv; 5495 uint64_t txg = 0; 5496 uint_t nspares, nl2cache; 5497 int error = 0; 5498 boolean_t locked = MUTEX_HELD(&spa_namespace_lock); 5499 5500 ASSERT(spa_writeable(spa)); 5501 5502 if (!locked) 5503 txg = spa_vdev_enter(spa); 5504 5505 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 5506 5507 if (spa->spa_spares.sav_vdevs != NULL && 5508 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 5509 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && 5510 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { 5511 /* 5512 * Only remove the hot spare if it's not currently in use 5513 * in this pool. 5514 */ 5515 if (vd == NULL || unspare) { 5516 spa_vdev_remove_aux(spa->spa_spares.sav_config, 5517 ZPOOL_CONFIG_SPARES, spares, nspares, nv); 5518 spa_load_spares(spa); 5519 spa->spa_spares.sav_sync = B_TRUE; 5520 } else { 5521 error = SET_ERROR(EBUSY); 5522 } 5523 } else if (spa->spa_l2cache.sav_vdevs != NULL && 5524 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 5525 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && 5526 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { 5527 /* 5528 * Cache devices can always be removed. 5529 */ 5530 spa_vdev_remove_aux(spa->spa_l2cache.sav_config, 5531 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); 5532 spa_load_l2cache(spa); 5533 spa->spa_l2cache.sav_sync = B_TRUE; 5534 } else if (vd != NULL && vd->vdev_islog) { 5535 ASSERT(!locked); 5536 ASSERT(vd == vd->vdev_top); 5537 5538 /* 5539 * XXX - Once we have bp-rewrite this should 5540 * become the common case. 5541 */ 5542 5543 mg = vd->vdev_mg; 5544 5545 /* 5546 * Stop allocating from this vdev. 5547 */ 5548 metaslab_group_passivate(mg); 5549 5550 /* 5551 * Wait for the youngest allocations and frees to sync, 5552 * and then wait for the deferral of those frees to finish. 5553 */ 5554 spa_vdev_config_exit(spa, NULL, 5555 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); 5556 5557 /* 5558 * Attempt to evacuate the vdev. 5559 */ 5560 error = spa_vdev_remove_evacuate(spa, vd); 5561 5562 txg = spa_vdev_config_enter(spa); 5563 5564 /* 5565 * If we couldn't evacuate the vdev, unwind. 5566 */ 5567 if (error) { 5568 metaslab_group_activate(mg); 5569 return (spa_vdev_exit(spa, NULL, txg, error)); 5570 } 5571 5572 /* 5573 * Clean up the vdev namespace. 5574 */ 5575 spa_vdev_remove_from_namespace(spa, vd); 5576 5577 } else if (vd != NULL) { 5578 /* 5579 * Normal vdevs cannot be removed (yet). 5580 */ 5581 error = SET_ERROR(ENOTSUP); 5582 } else { 5583 /* 5584 * There is no vdev of any kind with the specified guid. 5585 */ 5586 error = SET_ERROR(ENOENT); 5587 } 5588 5589 if (!locked) 5590 return (spa_vdev_exit(spa, NULL, txg, error)); 5591 5592 return (error); 5593} 5594 5595/* 5596 * Find any device that's done replacing, or a vdev marked 'unspare' that's 5597 * currently spared, so we can detach it. 5598 */ 5599static vdev_t * 5600spa_vdev_resilver_done_hunt(vdev_t *vd) 5601{ 5602 vdev_t *newvd, *oldvd; 5603 5604 for (int c = 0; c < vd->vdev_children; c++) { 5605 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 5606 if (oldvd != NULL) 5607 return (oldvd); 5608 } 5609 5610 /* 5611 * Check for a completed replacement. We always consider the first 5612 * vdev in the list to be the oldest vdev, and the last one to be 5613 * the newest (see spa_vdev_attach() for how that works). In 5614 * the case where the newest vdev is faulted, we will not automatically 5615 * remove it after a resilver completes. This is OK as it will require 5616 * user intervention to determine which disk the admin wishes to keep. 5617 */ 5618 if (vd->vdev_ops == &vdev_replacing_ops) { 5619 ASSERT(vd->vdev_children > 1); 5620 5621 newvd = vd->vdev_child[vd->vdev_children - 1]; 5622 oldvd = vd->vdev_child[0]; 5623 5624 if (vdev_dtl_empty(newvd, DTL_MISSING) && 5625 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5626 !vdev_dtl_required(oldvd)) 5627 return (oldvd); 5628 } 5629 5630 /* 5631 * Check for a completed resilver with the 'unspare' flag set. 5632 */ 5633 if (vd->vdev_ops == &vdev_spare_ops) { 5634 vdev_t *first = vd->vdev_child[0]; 5635 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 5636 5637 if (last->vdev_unspare) { 5638 oldvd = first; 5639 newvd = last; 5640 } else if (first->vdev_unspare) { 5641 oldvd = last; 5642 newvd = first; 5643 } else { 5644 oldvd = NULL; 5645 } 5646 5647 if (oldvd != NULL && 5648 vdev_dtl_empty(newvd, DTL_MISSING) && 5649 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5650 !vdev_dtl_required(oldvd)) 5651 return (oldvd); 5652 5653 /* 5654 * If there are more than two spares attached to a disk, 5655 * and those spares are not required, then we want to 5656 * attempt to free them up now so that they can be used 5657 * by other pools. Once we're back down to a single 5658 * disk+spare, we stop removing them. 5659 */ 5660 if (vd->vdev_children > 2) { 5661 newvd = vd->vdev_child[1]; 5662 5663 if (newvd->vdev_isspare && last->vdev_isspare && 5664 vdev_dtl_empty(last, DTL_MISSING) && 5665 vdev_dtl_empty(last, DTL_OUTAGE) && 5666 !vdev_dtl_required(newvd)) 5667 return (newvd); 5668 } 5669 } 5670 5671 return (NULL); 5672} 5673 5674static void 5675spa_vdev_resilver_done(spa_t *spa) 5676{ 5677 vdev_t *vd, *pvd, *ppvd; 5678 uint64_t guid, sguid, pguid, ppguid; 5679 5680 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5681 5682 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 5683 pvd = vd->vdev_parent; 5684 ppvd = pvd->vdev_parent; 5685 guid = vd->vdev_guid; 5686 pguid = pvd->vdev_guid; 5687 ppguid = ppvd->vdev_guid; 5688 sguid = 0; 5689 /* 5690 * If we have just finished replacing a hot spared device, then 5691 * we need to detach the parent's first child (the original hot 5692 * spare) as well. 5693 */ 5694 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 5695 ppvd->vdev_children == 2) { 5696 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 5697 sguid = ppvd->vdev_child[1]->vdev_guid; 5698 } 5699 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); 5700 5701 spa_config_exit(spa, SCL_ALL, FTAG); 5702 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 5703 return; 5704 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 5705 return; 5706 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5707 } 5708 5709 spa_config_exit(spa, SCL_ALL, FTAG); 5710} 5711 5712/* 5713 * Update the stored path or FRU for this vdev. 5714 */ 5715int 5716spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 5717 boolean_t ispath) 5718{ 5719 vdev_t *vd; 5720 boolean_t sync = B_FALSE; 5721 5722 ASSERT(spa_writeable(spa)); 5723 5724 spa_vdev_state_enter(spa, SCL_ALL); 5725 5726 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 5727 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 5728 5729 if (!vd->vdev_ops->vdev_op_leaf) 5730 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 5731 5732 if (ispath) { 5733 if (strcmp(value, vd->vdev_path) != 0) { 5734 spa_strfree(vd->vdev_path); 5735 vd->vdev_path = spa_strdup(value); 5736 sync = B_TRUE; 5737 } 5738 } else { 5739 if (vd->vdev_fru == NULL) { 5740 vd->vdev_fru = spa_strdup(value); 5741 sync = B_TRUE; 5742 } else if (strcmp(value, vd->vdev_fru) != 0) { 5743 spa_strfree(vd->vdev_fru); 5744 vd->vdev_fru = spa_strdup(value); 5745 sync = B_TRUE; 5746 } 5747 } 5748 5749 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 5750} 5751 5752int 5753spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 5754{ 5755 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 5756} 5757 5758int 5759spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 5760{ 5761 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 5762} 5763 5764/* 5765 * ========================================================================== 5766 * SPA Scanning 5767 * ========================================================================== 5768 */ 5769 5770int 5771spa_scan_stop(spa_t *spa) 5772{ 5773 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5774 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 5775 return (SET_ERROR(EBUSY)); 5776 return (dsl_scan_cancel(spa->spa_dsl_pool)); 5777} 5778 5779int 5780spa_scan(spa_t *spa, pool_scan_func_t func) 5781{ 5782 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5783 5784 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 5785 return (SET_ERROR(ENOTSUP)); 5786 5787 /* 5788 * If a resilver was requested, but there is no DTL on a 5789 * writeable leaf device, we have nothing to do. 5790 */ 5791 if (func == POOL_SCAN_RESILVER && 5792 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 5793 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 5794 return (0); 5795 } 5796 5797 return (dsl_scan(spa->spa_dsl_pool, func)); 5798} 5799 5800/* 5801 * ========================================================================== 5802 * SPA async task processing 5803 * ========================================================================== 5804 */ 5805 5806static void 5807spa_async_remove(spa_t *spa, vdev_t *vd) 5808{ 5809 if (vd->vdev_remove_wanted) { 5810 vd->vdev_remove_wanted = B_FALSE; 5811 vd->vdev_delayed_close = B_FALSE; 5812 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 5813 5814 /* 5815 * We want to clear the stats, but we don't want to do a full 5816 * vdev_clear() as that will cause us to throw away 5817 * degraded/faulted state as well as attempt to reopen the 5818 * device, all of which is a waste. 5819 */ 5820 vd->vdev_stat.vs_read_errors = 0; 5821 vd->vdev_stat.vs_write_errors = 0; 5822 vd->vdev_stat.vs_checksum_errors = 0; 5823 5824 vdev_state_dirty(vd->vdev_top); 5825 } 5826 5827 for (int c = 0; c < vd->vdev_children; c++) 5828 spa_async_remove(spa, vd->vdev_child[c]); 5829} 5830 5831static void 5832spa_async_probe(spa_t *spa, vdev_t *vd) 5833{ 5834 if (vd->vdev_probe_wanted) { 5835 vd->vdev_probe_wanted = B_FALSE; 5836 vdev_reopen(vd); /* vdev_open() does the actual probe */ 5837 } 5838 5839 for (int c = 0; c < vd->vdev_children; c++) 5840 spa_async_probe(spa, vd->vdev_child[c]); 5841} 5842 5843static void 5844spa_async_autoexpand(spa_t *spa, vdev_t *vd) 5845{ 5846 sysevent_id_t eid; 5847 nvlist_t *attr; 5848 char *physpath; 5849 5850 if (!spa->spa_autoexpand) 5851 return; 5852 5853 for (int c = 0; c < vd->vdev_children; c++) { 5854 vdev_t *cvd = vd->vdev_child[c]; 5855 spa_async_autoexpand(spa, cvd); 5856 } 5857 5858 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 5859 return; 5860 5861 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 5862 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 5863 5864 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5865 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); 5866 5867 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, 5868 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP); 5869 5870 nvlist_free(attr); 5871 kmem_free(physpath, MAXPATHLEN); 5872} 5873 5874static void 5875spa_async_thread(void *arg) 5876{ 5877 spa_t *spa = arg; 5878 int tasks; 5879 5880 ASSERT(spa->spa_sync_on); 5881 5882 mutex_enter(&spa->spa_async_lock); 5883 tasks = spa->spa_async_tasks; 5884 spa->spa_async_tasks &= SPA_ASYNC_REMOVE; 5885 mutex_exit(&spa->spa_async_lock); 5886 5887 /* 5888 * See if the config needs to be updated. 5889 */ 5890 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 5891 uint64_t old_space, new_space; 5892 5893 mutex_enter(&spa_namespace_lock); 5894 old_space = metaslab_class_get_space(spa_normal_class(spa)); 5895 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5896 new_space = metaslab_class_get_space(spa_normal_class(spa)); 5897 mutex_exit(&spa_namespace_lock); 5898 5899 /* 5900 * If the pool grew as a result of the config update, 5901 * then log an internal history event. 5902 */ 5903 if (new_space != old_space) { 5904 spa_history_log_internal(spa, "vdev online", NULL, 5905 "pool '%s' size: %llu(+%llu)", 5906 spa_name(spa), new_space, new_space - old_space); 5907 } 5908 } 5909 5910 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 5911 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5912 spa_async_autoexpand(spa, spa->spa_root_vdev); 5913 spa_config_exit(spa, SCL_CONFIG, FTAG); 5914 } 5915 5916 /* 5917 * See if any devices need to be probed. 5918 */ 5919 if (tasks & SPA_ASYNC_PROBE) { 5920 spa_vdev_state_enter(spa, SCL_NONE); 5921 spa_async_probe(spa, spa->spa_root_vdev); 5922 (void) spa_vdev_state_exit(spa, NULL, 0); 5923 } 5924 5925 /* 5926 * If any devices are done replacing, detach them. 5927 */ 5928 if (tasks & SPA_ASYNC_RESILVER_DONE) 5929 spa_vdev_resilver_done(spa); 5930 5931 /* 5932 * Kick off a resilver. 5933 */ 5934 if (tasks & SPA_ASYNC_RESILVER) 5935 dsl_resilver_restart(spa->spa_dsl_pool, 0); 5936 5937 /* 5938 * Let the world know that we're done. 5939 */ 5940 mutex_enter(&spa->spa_async_lock); 5941 spa->spa_async_thread = NULL; 5942 cv_broadcast(&spa->spa_async_cv); 5943 mutex_exit(&spa->spa_async_lock); 5944 thread_exit(); 5945} 5946 5947static void 5948spa_async_thread_vd(void *arg) 5949{ 5950 spa_t *spa = arg; 5951 int tasks; 5952 5953 ASSERT(spa->spa_sync_on); 5954 5955 mutex_enter(&spa->spa_async_lock); 5956 tasks = spa->spa_async_tasks; 5957retry: 5958 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE; 5959 mutex_exit(&spa->spa_async_lock); 5960 5961 /* 5962 * See if any devices need to be marked REMOVED. 5963 */ 5964 if (tasks & SPA_ASYNC_REMOVE) { 5965 spa_vdev_state_enter(spa, SCL_NONE); 5966 spa_async_remove(spa, spa->spa_root_vdev); 5967 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 5968 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 5969 for (int i = 0; i < spa->spa_spares.sav_count; i++) 5970 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 5971 (void) spa_vdev_state_exit(spa, NULL, 0); 5972 } 5973 5974 /* 5975 * Let the world know that we're done. 5976 */ 5977 mutex_enter(&spa->spa_async_lock); 5978 tasks = spa->spa_async_tasks; 5979 if ((tasks & SPA_ASYNC_REMOVE) != 0) 5980 goto retry; 5981 spa->spa_async_thread_vd = NULL; 5982 cv_broadcast(&spa->spa_async_cv); 5983 mutex_exit(&spa->spa_async_lock); 5984 thread_exit(); 5985} 5986 5987void 5988spa_async_suspend(spa_t *spa) 5989{ 5990 mutex_enter(&spa->spa_async_lock); 5991 spa->spa_async_suspended++; 5992 while (spa->spa_async_thread != NULL && 5993 spa->spa_async_thread_vd != NULL) 5994 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 5995 mutex_exit(&spa->spa_async_lock); 5996} 5997 5998void 5999spa_async_resume(spa_t *spa) 6000{ 6001 mutex_enter(&spa->spa_async_lock); 6002 ASSERT(spa->spa_async_suspended != 0); 6003 spa->spa_async_suspended--; 6004 mutex_exit(&spa->spa_async_lock); 6005} 6006 6007static boolean_t 6008spa_async_tasks_pending(spa_t *spa) 6009{ 6010 uint_t non_config_tasks; 6011 uint_t config_task; 6012 boolean_t config_task_suspended; 6013 6014 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE | 6015 SPA_ASYNC_REMOVE); 6016 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; 6017 if (spa->spa_ccw_fail_time == 0) { 6018 config_task_suspended = B_FALSE; 6019 } else { 6020 config_task_suspended = 6021 (gethrtime() - spa->spa_ccw_fail_time) < 6022 (zfs_ccw_retry_interval * NANOSEC); 6023 } 6024 6025 return (non_config_tasks || (config_task && !config_task_suspended)); 6026} 6027 6028static void 6029spa_async_dispatch(spa_t *spa) 6030{ 6031 mutex_enter(&spa->spa_async_lock); 6032 if (spa_async_tasks_pending(spa) && 6033 !spa->spa_async_suspended && 6034 spa->spa_async_thread == NULL && 6035 rootdir != NULL) 6036 spa->spa_async_thread = thread_create(NULL, 0, 6037 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 6038 mutex_exit(&spa->spa_async_lock); 6039} 6040 6041static void 6042spa_async_dispatch_vd(spa_t *spa) 6043{ 6044 mutex_enter(&spa->spa_async_lock); 6045 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 && 6046 !spa->spa_async_suspended && 6047 spa->spa_async_thread_vd == NULL && 6048 rootdir != NULL) 6049 spa->spa_async_thread_vd = thread_create(NULL, 0, 6050 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri); 6051 mutex_exit(&spa->spa_async_lock); 6052} 6053 6054void 6055spa_async_request(spa_t *spa, int task) 6056{ 6057 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 6058 mutex_enter(&spa->spa_async_lock); 6059 spa->spa_async_tasks |= task; 6060 mutex_exit(&spa->spa_async_lock); 6061 spa_async_dispatch_vd(spa); 6062} 6063 6064/* 6065 * ========================================================================== 6066 * SPA syncing routines 6067 * ========================================================================== 6068 */ 6069 6070static int 6071bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6072{ 6073 bpobj_t *bpo = arg; 6074 bpobj_enqueue(bpo, bp, tx); 6075 return (0); 6076} 6077 6078static int 6079spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6080{ 6081 zio_t *zio = arg; 6082 6083 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 6084 BP_GET_PSIZE(bp), zio->io_flags)); 6085 return (0); 6086} 6087 6088/* 6089 * Note: this simple function is not inlined to make it easier to dtrace the 6090 * amount of time spent syncing frees. 6091 */ 6092static void 6093spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) 6094{ 6095 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6096 bplist_iterate(bpl, spa_free_sync_cb, zio, tx); 6097 VERIFY(zio_wait(zio) == 0); 6098} 6099 6100/* 6101 * Note: this simple function is not inlined to make it easier to dtrace the 6102 * amount of time spent syncing deferred frees. 6103 */ 6104static void 6105spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) 6106{ 6107 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6108 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, 6109 spa_free_sync_cb, zio, tx), ==, 0); 6110 VERIFY0(zio_wait(zio)); 6111} 6112 6113 6114static void 6115spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 6116{ 6117 char *packed = NULL; 6118 size_t bufsize; 6119 size_t nvsize = 0; 6120 dmu_buf_t *db; 6121 6122 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 6123 6124 /* 6125 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 6126 * information. This avoids the dmu_buf_will_dirty() path and 6127 * saves us a pre-read to get data we don't actually care about. 6128 */ 6129 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 6130 packed = kmem_alloc(bufsize, KM_SLEEP); 6131 6132 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 6133 KM_SLEEP) == 0); 6134 bzero(packed + nvsize, bufsize - nvsize); 6135 6136 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 6137 6138 kmem_free(packed, bufsize); 6139 6140 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 6141 dmu_buf_will_dirty(db, tx); 6142 *(uint64_t *)db->db_data = nvsize; 6143 dmu_buf_rele(db, FTAG); 6144} 6145 6146static void 6147spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 6148 const char *config, const char *entry) 6149{ 6150 nvlist_t *nvroot; 6151 nvlist_t **list; 6152 int i; 6153 6154 if (!sav->sav_sync) 6155 return; 6156 6157 /* 6158 * Update the MOS nvlist describing the list of available devices. 6159 * spa_validate_aux() will have already made sure this nvlist is 6160 * valid and the vdevs are labeled appropriately. 6161 */ 6162 if (sav->sav_object == 0) { 6163 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 6164 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 6165 sizeof (uint64_t), tx); 6166 VERIFY(zap_update(spa->spa_meta_objset, 6167 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 6168 &sav->sav_object, tx) == 0); 6169 } 6170 6171 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 6172 if (sav->sav_count == 0) { 6173 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 6174 } else { 6175 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 6176 for (i = 0; i < sav->sav_count; i++) 6177 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 6178 B_FALSE, VDEV_CONFIG_L2CACHE); 6179 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 6180 sav->sav_count) == 0); 6181 for (i = 0; i < sav->sav_count; i++) 6182 nvlist_free(list[i]); 6183 kmem_free(list, sav->sav_count * sizeof (void *)); 6184 } 6185 6186 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 6187 nvlist_free(nvroot); 6188 6189 sav->sav_sync = B_FALSE; 6190} 6191 6192static void 6193spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 6194{ 6195 nvlist_t *config; 6196 6197 if (list_is_empty(&spa->spa_config_dirty_list)) 6198 return; 6199 6200 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6201 6202 config = spa_config_generate(spa, spa->spa_root_vdev, 6203 dmu_tx_get_txg(tx), B_FALSE); 6204 6205 /* 6206 * If we're upgrading the spa version then make sure that 6207 * the config object gets updated with the correct version. 6208 */ 6209 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) 6210 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 6211 spa->spa_uberblock.ub_version); 6212 6213 spa_config_exit(spa, SCL_STATE, FTAG); 6214 6215 if (spa->spa_config_syncing) 6216 nvlist_free(spa->spa_config_syncing); 6217 spa->spa_config_syncing = config; 6218 6219 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 6220} 6221 6222static void 6223spa_sync_version(void *arg, dmu_tx_t *tx) 6224{ 6225 uint64_t *versionp = arg; 6226 uint64_t version = *versionp; 6227 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6228 6229 /* 6230 * Setting the version is special cased when first creating the pool. 6231 */ 6232 ASSERT(tx->tx_txg != TXG_INITIAL); 6233 6234 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 6235 ASSERT(version >= spa_version(spa)); 6236 6237 spa->spa_uberblock.ub_version = version; 6238 vdev_config_dirty(spa->spa_root_vdev); 6239 spa_history_log_internal(spa, "set", tx, "version=%lld", version); 6240} 6241 6242/* 6243 * Set zpool properties. 6244 */ 6245static void 6246spa_sync_props(void *arg, dmu_tx_t *tx) 6247{ 6248 nvlist_t *nvp = arg; 6249 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6250 objset_t *mos = spa->spa_meta_objset; 6251 nvpair_t *elem = NULL; 6252 6253 mutex_enter(&spa->spa_props_lock); 6254 6255 while ((elem = nvlist_next_nvpair(nvp, elem))) { 6256 uint64_t intval; 6257 char *strval, *fname; 6258 zpool_prop_t prop; 6259 const char *propname; 6260 zprop_type_t proptype; 6261 spa_feature_t fid; 6262 6263 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 6264 case ZPROP_INVAL: 6265 /* 6266 * We checked this earlier in spa_prop_validate(). 6267 */ 6268 ASSERT(zpool_prop_feature(nvpair_name(elem))); 6269 6270 fname = strchr(nvpair_name(elem), '@') + 1; 6271 VERIFY0(zfeature_lookup_name(fname, &fid)); 6272 6273 spa_feature_enable(spa, fid, tx); 6274 spa_history_log_internal(spa, "set", tx, 6275 "%s=enabled", nvpair_name(elem)); 6276 break; 6277 6278 case ZPOOL_PROP_VERSION: 6279 intval = fnvpair_value_uint64(elem); 6280 /* 6281 * The version is synced seperatly before other 6282 * properties and should be correct by now. 6283 */ 6284 ASSERT3U(spa_version(spa), >=, intval); 6285 break; 6286 6287 case ZPOOL_PROP_ALTROOT: 6288 /* 6289 * 'altroot' is a non-persistent property. It should 6290 * have been set temporarily at creation or import time. 6291 */ 6292 ASSERT(spa->spa_root != NULL); 6293 break; 6294 6295 case ZPOOL_PROP_READONLY: 6296 case ZPOOL_PROP_CACHEFILE: 6297 /* 6298 * 'readonly' and 'cachefile' are also non-persisitent 6299 * properties. 6300 */ 6301 break; 6302 case ZPOOL_PROP_COMMENT: 6303 strval = fnvpair_value_string(elem); 6304 if (spa->spa_comment != NULL) 6305 spa_strfree(spa->spa_comment); 6306 spa->spa_comment = spa_strdup(strval); 6307 /* 6308 * We need to dirty the configuration on all the vdevs 6309 * so that their labels get updated. It's unnecessary 6310 * to do this for pool creation since the vdev's 6311 * configuratoin has already been dirtied. 6312 */ 6313 if (tx->tx_txg != TXG_INITIAL) 6314 vdev_config_dirty(spa->spa_root_vdev); 6315 spa_history_log_internal(spa, "set", tx, 6316 "%s=%s", nvpair_name(elem), strval); 6317 break; 6318 default: 6319 /* 6320 * Set pool property values in the poolprops mos object. 6321 */ 6322 if (spa->spa_pool_props_object == 0) { 6323 spa->spa_pool_props_object = 6324 zap_create_link(mos, DMU_OT_POOL_PROPS, 6325 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 6326 tx); 6327 } 6328 6329 /* normalize the property name */ 6330 propname = zpool_prop_to_name(prop); 6331 proptype = zpool_prop_get_type(prop); 6332 6333 if (nvpair_type(elem) == DATA_TYPE_STRING) { 6334 ASSERT(proptype == PROP_TYPE_STRING); 6335 strval = fnvpair_value_string(elem); 6336 VERIFY0(zap_update(mos, 6337 spa->spa_pool_props_object, propname, 6338 1, strlen(strval) + 1, strval, tx)); 6339 spa_history_log_internal(spa, "set", tx, 6340 "%s=%s", nvpair_name(elem), strval); 6341 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 6342 intval = fnvpair_value_uint64(elem); 6343 6344 if (proptype == PROP_TYPE_INDEX) { 6345 const char *unused; 6346 VERIFY0(zpool_prop_index_to_string( 6347 prop, intval, &unused)); 6348 } 6349 VERIFY0(zap_update(mos, 6350 spa->spa_pool_props_object, propname, 6351 8, 1, &intval, tx)); 6352 spa_history_log_internal(spa, "set", tx, 6353 "%s=%lld", nvpair_name(elem), intval); 6354 } else { 6355 ASSERT(0); /* not allowed */ 6356 } 6357 6358 switch (prop) { 6359 case ZPOOL_PROP_DELEGATION: 6360 spa->spa_delegation = intval; 6361 break; 6362 case ZPOOL_PROP_BOOTFS: 6363 spa->spa_bootfs = intval; 6364 break; 6365 case ZPOOL_PROP_FAILUREMODE: 6366 spa->spa_failmode = intval; 6367 break; 6368 case ZPOOL_PROP_AUTOEXPAND: 6369 spa->spa_autoexpand = intval; 6370 if (tx->tx_txg != TXG_INITIAL) 6371 spa_async_request(spa, 6372 SPA_ASYNC_AUTOEXPAND); 6373 break; 6374 case ZPOOL_PROP_DEDUPDITTO: 6375 spa->spa_dedup_ditto = intval; 6376 break; 6377 default: 6378 break; 6379 } 6380 } 6381 6382 } 6383 6384 mutex_exit(&spa->spa_props_lock); 6385} 6386 6387/* 6388 * Perform one-time upgrade on-disk changes. spa_version() does not 6389 * reflect the new version this txg, so there must be no changes this 6390 * txg to anything that the upgrade code depends on after it executes. 6391 * Therefore this must be called after dsl_pool_sync() does the sync 6392 * tasks. 6393 */ 6394static void 6395spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 6396{ 6397 dsl_pool_t *dp = spa->spa_dsl_pool; 6398 6399 ASSERT(spa->spa_sync_pass == 1); 6400 6401 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); 6402 6403 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 6404 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 6405 dsl_pool_create_origin(dp, tx); 6406 6407 /* Keeping the origin open increases spa_minref */ 6408 spa->spa_minref += 3; 6409 } 6410 6411 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 6412 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 6413 dsl_pool_upgrade_clones(dp, tx); 6414 } 6415 6416 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 6417 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 6418 dsl_pool_upgrade_dir_clones(dp, tx); 6419 6420 /* Keeping the freedir open increases spa_minref */ 6421 spa->spa_minref += 3; 6422 } 6423 6424 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 6425 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6426 spa_feature_create_zap_objects(spa, tx); 6427 } 6428 rrw_exit(&dp->dp_config_rwlock, FTAG); 6429} 6430 6431/* 6432 * Sync the specified transaction group. New blocks may be dirtied as 6433 * part of the process, so we iterate until it converges. 6434 */ 6435void 6436spa_sync(spa_t *spa, uint64_t txg) 6437{ 6438 dsl_pool_t *dp = spa->spa_dsl_pool; 6439 objset_t *mos = spa->spa_meta_objset; 6440 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 6441 vdev_t *rvd = spa->spa_root_vdev; 6442 vdev_t *vd; 6443 dmu_tx_t *tx; 6444 int error; 6445 6446 VERIFY(spa_writeable(spa)); 6447 6448 /* 6449 * Lock out configuration changes. 6450 */ 6451 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 6452 6453 spa->spa_syncing_txg = txg; 6454 spa->spa_sync_pass = 0; 6455 6456 /* 6457 * If there are any pending vdev state changes, convert them 6458 * into config changes that go out with this transaction group. 6459 */ 6460 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6461 while (list_head(&spa->spa_state_dirty_list) != NULL) { 6462 /* 6463 * We need the write lock here because, for aux vdevs, 6464 * calling vdev_config_dirty() modifies sav_config. 6465 * This is ugly and will become unnecessary when we 6466 * eliminate the aux vdev wart by integrating all vdevs 6467 * into the root vdev tree. 6468 */ 6469 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6470 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 6471 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 6472 vdev_state_clean(vd); 6473 vdev_config_dirty(vd); 6474 } 6475 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6476 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6477 } 6478 spa_config_exit(spa, SCL_STATE, FTAG); 6479 6480 tx = dmu_tx_create_assigned(dp, txg); 6481 6482 spa->spa_sync_starttime = gethrtime(); 6483#ifdef illumos 6484 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, 6485 spa->spa_sync_starttime + spa->spa_deadman_synctime)); 6486#else /* FreeBSD */ 6487#ifdef _KERNEL 6488 callout_reset(&spa->spa_deadman_cycid, 6489 hz * spa->spa_deadman_synctime / NANOSEC, spa_deadman, spa); 6490#endif 6491#endif 6492 6493 /* 6494 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 6495 * set spa_deflate if we have no raid-z vdevs. 6496 */ 6497 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 6498 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 6499 int i; 6500 6501 for (i = 0; i < rvd->vdev_children; i++) { 6502 vd = rvd->vdev_child[i]; 6503 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 6504 break; 6505 } 6506 if (i == rvd->vdev_children) { 6507 spa->spa_deflate = TRUE; 6508 VERIFY(0 == zap_add(spa->spa_meta_objset, 6509 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 6510 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 6511 } 6512 } 6513 6514 /* 6515 * If anything has changed in this txg, or if someone is waiting 6516 * for this txg to sync (eg, spa_vdev_remove()), push the 6517 * deferred frees from the previous txg. If not, leave them 6518 * alone so that we don't generate work on an otherwise idle 6519 * system. 6520 */ 6521 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || 6522 !txg_list_empty(&dp->dp_dirty_dirs, txg) || 6523 !txg_list_empty(&dp->dp_sync_tasks, txg) || 6524 ((dsl_scan_active(dp->dp_scan) || 6525 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) { 6526 spa_sync_deferred_frees(spa, tx); 6527 } 6528 6529 /* 6530 * Iterate to convergence. 6531 */ 6532 do { 6533 int pass = ++spa->spa_sync_pass; 6534 6535 spa_sync_config_object(spa, tx); 6536 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 6537 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 6538 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 6539 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 6540 spa_errlog_sync(spa, txg); 6541 dsl_pool_sync(dp, txg); 6542 6543 if (pass < zfs_sync_pass_deferred_free) { 6544 spa_sync_frees(spa, free_bpl, tx); 6545 } else { 6546 bplist_iterate(free_bpl, bpobj_enqueue_cb, 6547 &spa->spa_deferred_bpobj, tx); 6548 } 6549 6550 ddt_sync(spa, txg); 6551 dsl_scan_sync(dp, tx); 6552 6553 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 6554 vdev_sync(vd, txg); 6555 6556 if (pass == 1) 6557 spa_sync_upgrades(spa, tx); 6558 6559 } while (dmu_objset_is_dirty(mos, txg)); 6560 6561 /* 6562 * Rewrite the vdev configuration (which includes the uberblock) 6563 * to commit the transaction group. 6564 * 6565 * If there are no dirty vdevs, we sync the uberblock to a few 6566 * random top-level vdevs that are known to be visible in the 6567 * config cache (see spa_vdev_add() for a complete description). 6568 * If there *are* dirty vdevs, sync the uberblock to all vdevs. 6569 */ 6570 for (;;) { 6571 /* 6572 * We hold SCL_STATE to prevent vdev open/close/etc. 6573 * while we're attempting to write the vdev labels. 6574 */ 6575 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6576 6577 if (list_is_empty(&spa->spa_config_dirty_list)) { 6578 vdev_t *svd[SPA_DVAS_PER_BP]; 6579 int svdcount = 0; 6580 int children = rvd->vdev_children; 6581 int c0 = spa_get_random(children); 6582 6583 for (int c = 0; c < children; c++) { 6584 vd = rvd->vdev_child[(c0 + c) % children]; 6585 if (vd->vdev_ms_array == 0 || vd->vdev_islog) 6586 continue; 6587 svd[svdcount++] = vd; 6588 if (svdcount == SPA_DVAS_PER_BP) 6589 break; 6590 } 6591 error = vdev_config_sync(svd, svdcount, txg, B_FALSE); 6592 if (error != 0) 6593 error = vdev_config_sync(svd, svdcount, txg, 6594 B_TRUE); 6595 } else { 6596 error = vdev_config_sync(rvd->vdev_child, 6597 rvd->vdev_children, txg, B_FALSE); 6598 if (error != 0) 6599 error = vdev_config_sync(rvd->vdev_child, 6600 rvd->vdev_children, txg, B_TRUE); 6601 } 6602 6603 if (error == 0) 6604 spa->spa_last_synced_guid = rvd->vdev_guid; 6605 6606 spa_config_exit(spa, SCL_STATE, FTAG); 6607 6608 if (error == 0) 6609 break; 6610 zio_suspend(spa, NULL); 6611 zio_resume_wait(spa); 6612 } 6613 dmu_tx_commit(tx); 6614 6615#ifdef illumos 6616 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 6617#else /* FreeBSD */ 6618#ifdef _KERNEL 6619 callout_drain(&spa->spa_deadman_cycid); 6620#endif 6621#endif 6622 6623 /* 6624 * Clear the dirty config list. 6625 */ 6626 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 6627 vdev_config_clean(vd); 6628 6629 /* 6630 * Now that the new config has synced transactionally, 6631 * let it become visible to the config cache. 6632 */ 6633 if (spa->spa_config_syncing != NULL) { 6634 spa_config_set(spa, spa->spa_config_syncing); 6635 spa->spa_config_txg = txg; 6636 spa->spa_config_syncing = NULL; 6637 } 6638 6639 spa->spa_ubsync = spa->spa_uberblock; 6640 6641 dsl_pool_sync_done(dp, txg); 6642 6643 /* 6644 * Update usable space statistics. 6645 */ 6646 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 6647 vdev_sync_done(vd, txg); 6648 6649 spa_update_dspace(spa); 6650 6651 /* 6652 * It had better be the case that we didn't dirty anything 6653 * since vdev_config_sync(). 6654 */ 6655 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 6656 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 6657 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 6658 6659 spa->spa_sync_pass = 0; 6660 6661 spa_config_exit(spa, SCL_CONFIG, FTAG); 6662 6663 spa_handle_ignored_writes(spa); 6664 6665 /* 6666 * If any async tasks have been requested, kick them off. 6667 */ 6668 spa_async_dispatch(spa); 6669 spa_async_dispatch_vd(spa); 6670} 6671 6672/* 6673 * Sync all pools. We don't want to hold the namespace lock across these 6674 * operations, so we take a reference on the spa_t and drop the lock during the 6675 * sync. 6676 */ 6677void 6678spa_sync_allpools(void) 6679{ 6680 spa_t *spa = NULL; 6681 mutex_enter(&spa_namespace_lock); 6682 while ((spa = spa_next(spa)) != NULL) { 6683 if (spa_state(spa) != POOL_STATE_ACTIVE || 6684 !spa_writeable(spa) || spa_suspended(spa)) 6685 continue; 6686 spa_open_ref(spa, FTAG); 6687 mutex_exit(&spa_namespace_lock); 6688 txg_wait_synced(spa_get_dsl(spa), 0); 6689 mutex_enter(&spa_namespace_lock); 6690 spa_close(spa, FTAG); 6691 } 6692 mutex_exit(&spa_namespace_lock); 6693} 6694 6695/* 6696 * ========================================================================== 6697 * Miscellaneous routines 6698 * ========================================================================== 6699 */ 6700 6701/* 6702 * Remove all pools in the system. 6703 */ 6704void 6705spa_evict_all(void) 6706{ 6707 spa_t *spa; 6708 6709 /* 6710 * Remove all cached state. All pools should be closed now, 6711 * so every spa in the AVL tree should be unreferenced. 6712 */ 6713 mutex_enter(&spa_namespace_lock); 6714 while ((spa = spa_next(NULL)) != NULL) { 6715 /* 6716 * Stop async tasks. The async thread may need to detach 6717 * a device that's been replaced, which requires grabbing 6718 * spa_namespace_lock, so we must drop it here. 6719 */ 6720 spa_open_ref(spa, FTAG); 6721 mutex_exit(&spa_namespace_lock); 6722 spa_async_suspend(spa); 6723 mutex_enter(&spa_namespace_lock); 6724 spa_close(spa, FTAG); 6725 6726 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 6727 spa_unload(spa); 6728 spa_deactivate(spa); 6729 } 6730 spa_remove(spa); 6731 } 6732 mutex_exit(&spa_namespace_lock); 6733} 6734 6735vdev_t * 6736spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 6737{ 6738 vdev_t *vd; 6739 int i; 6740 6741 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 6742 return (vd); 6743 6744 if (aux) { 6745 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 6746 vd = spa->spa_l2cache.sav_vdevs[i]; 6747 if (vd->vdev_guid == guid) 6748 return (vd); 6749 } 6750 6751 for (i = 0; i < spa->spa_spares.sav_count; i++) { 6752 vd = spa->spa_spares.sav_vdevs[i]; 6753 if (vd->vdev_guid == guid) 6754 return (vd); 6755 } 6756 } 6757 6758 return (NULL); 6759} 6760 6761void 6762spa_upgrade(spa_t *spa, uint64_t version) 6763{ 6764 ASSERT(spa_writeable(spa)); 6765 6766 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 6767 6768 /* 6769 * This should only be called for a non-faulted pool, and since a 6770 * future version would result in an unopenable pool, this shouldn't be 6771 * possible. 6772 */ 6773 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); 6774 ASSERT(version >= spa->spa_uberblock.ub_version); 6775 6776 spa->spa_uberblock.ub_version = version; 6777 vdev_config_dirty(spa->spa_root_vdev); 6778 6779 spa_config_exit(spa, SCL_ALL, FTAG); 6780 6781 txg_wait_synced(spa_get_dsl(spa), 0); 6782} 6783 6784boolean_t 6785spa_has_spare(spa_t *spa, uint64_t guid) 6786{ 6787 int i; 6788 uint64_t spareguid; 6789 spa_aux_vdev_t *sav = &spa->spa_spares; 6790 6791 for (i = 0; i < sav->sav_count; i++) 6792 if (sav->sav_vdevs[i]->vdev_guid == guid) 6793 return (B_TRUE); 6794 6795 for (i = 0; i < sav->sav_npending; i++) { 6796 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 6797 &spareguid) == 0 && spareguid == guid) 6798 return (B_TRUE); 6799 } 6800 6801 return (B_FALSE); 6802} 6803 6804/* 6805 * Check if a pool has an active shared spare device. 6806 * Note: reference count of an active spare is 2, as a spare and as a replace 6807 */ 6808static boolean_t 6809spa_has_active_shared_spare(spa_t *spa) 6810{ 6811 int i, refcnt; 6812 uint64_t pool; 6813 spa_aux_vdev_t *sav = &spa->spa_spares; 6814 6815 for (i = 0; i < sav->sav_count; i++) { 6816 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 6817 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 6818 refcnt > 2) 6819 return (B_TRUE); 6820 } 6821 6822 return (B_FALSE); 6823} 6824 6825/* 6826 * Post a sysevent corresponding to the given event. The 'name' must be one of 6827 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 6828 * filled in from the spa and (optionally) the vdev. This doesn't do anything 6829 * in the userland libzpool, as we don't want consumers to misinterpret ztest 6830 * or zdb as real changes. 6831 */ 6832void 6833spa_event_notify(spa_t *spa, vdev_t *vd, const char *name) 6834{ 6835#ifdef _KERNEL 6836 sysevent_t *ev; 6837 sysevent_attr_list_t *attr = NULL; 6838 sysevent_value_t value; 6839 sysevent_id_t eid; 6840 6841 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 6842 SE_SLEEP); 6843 6844 value.value_type = SE_DATA_TYPE_STRING; 6845 value.value.sv_string = spa_name(spa); 6846 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 6847 goto done; 6848 6849 value.value_type = SE_DATA_TYPE_UINT64; 6850 value.value.sv_uint64 = spa_guid(spa); 6851 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 6852 goto done; 6853 6854 if (vd) { 6855 value.value_type = SE_DATA_TYPE_UINT64; 6856 value.value.sv_uint64 = vd->vdev_guid; 6857 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 6858 SE_SLEEP) != 0) 6859 goto done; 6860 6861 if (vd->vdev_path) { 6862 value.value_type = SE_DATA_TYPE_STRING; 6863 value.value.sv_string = vd->vdev_path; 6864 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 6865 &value, SE_SLEEP) != 0) 6866 goto done; 6867 } 6868 } 6869 6870 if (sysevent_attach_attributes(ev, attr) != 0) 6871 goto done; 6872 attr = NULL; 6873 6874 (void) log_sysevent(ev, SE_SLEEP, &eid); 6875 6876done: 6877 if (attr) 6878 sysevent_free_attr(attr); 6879 sysevent_free(ev); 6880#endif 6881} 6882