spa.c revision 238926
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) 2012 by Delphix. All rights reserved. 25 */ 26 27/* 28 * This file contains all the routines used when modifying on-disk SPA state. 29 * This includes opening, importing, destroying, exporting a pool, and syncing a 30 * pool. 31 */ 32 33#include <sys/zfs_context.h> 34#include <sys/fm/fs/zfs.h> 35#include <sys/spa_impl.h> 36#include <sys/zio.h> 37#include <sys/zio_checksum.h> 38#include <sys/dmu.h> 39#include <sys/dmu_tx.h> 40#include <sys/zap.h> 41#include <sys/zil.h> 42#include <sys/ddt.h> 43#include <sys/vdev_impl.h> 44#include <sys/metaslab.h> 45#include <sys/metaslab_impl.h> 46#include <sys/uberblock_impl.h> 47#include <sys/txg.h> 48#include <sys/avl.h> 49#include <sys/dmu_traverse.h> 50#include <sys/dmu_objset.h> 51#include <sys/unique.h> 52#include <sys/dsl_pool.h> 53#include <sys/dsl_dataset.h> 54#include <sys/dsl_dir.h> 55#include <sys/dsl_prop.h> 56#include <sys/dsl_synctask.h> 57#include <sys/fs/zfs.h> 58#include <sys/arc.h> 59#include <sys/callb.h> 60#include <sys/spa_boot.h> 61#include <sys/zfs_ioctl.h> 62#include <sys/dsl_scan.h> 63#include <sys/zfeature.h> 64#include <sys/zvol.h> 65 66#ifdef _KERNEL 67#include <sys/callb.h> 68#include <sys/cpupart.h> 69#include <sys/zone.h> 70#endif /* _KERNEL */ 71 72#include "zfs_prop.h" 73#include "zfs_comutil.h" 74 75/* Check hostid on import? */ 76static int check_hostid = 1; 77 78SYSCTL_DECL(_vfs_zfs); 79TUNABLE_INT("vfs.zfs.check_hostid", &check_hostid); 80SYSCTL_INT(_vfs_zfs, OID_AUTO, check_hostid, CTLFLAG_RW, &check_hostid, 0, 81 "Check hostid on import?"); 82 83typedef enum zti_modes { 84 zti_mode_fixed, /* value is # of threads (min 1) */ 85 zti_mode_online_percent, /* value is % of online CPUs */ 86 zti_mode_batch, /* cpu-intensive; value is ignored */ 87 zti_mode_null, /* don't create a taskq */ 88 zti_nmodes 89} zti_modes_t; 90 91#define ZTI_FIX(n) { zti_mode_fixed, (n) } 92#define ZTI_PCT(n) { zti_mode_online_percent, (n) } 93#define ZTI_BATCH { zti_mode_batch, 0 } 94#define ZTI_NULL { zti_mode_null, 0 } 95 96#define ZTI_ONE ZTI_FIX(1) 97 98typedef struct zio_taskq_info { 99 enum zti_modes zti_mode; 100 uint_t zti_value; 101} zio_taskq_info_t; 102 103static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { 104 "issue", "issue_high", "intr", "intr_high" 105}; 106 107/* 108 * Define the taskq threads for the following I/O types: 109 * NULL, READ, WRITE, FREE, CLAIM, and IOCTL 110 */ 111const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = { 112 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */ 113 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, 114 { ZTI_FIX(8), ZTI_NULL, ZTI_BATCH, ZTI_NULL }, 115 { ZTI_BATCH, ZTI_FIX(5), ZTI_FIX(8), ZTI_FIX(5) }, 116 { ZTI_FIX(100), ZTI_NULL, ZTI_ONE, ZTI_NULL }, 117 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, 118 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, 119}; 120 121static dsl_syncfunc_t spa_sync_version; 122static dsl_syncfunc_t spa_sync_props; 123static boolean_t spa_has_active_shared_spare(spa_t *spa); 124static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config, 125 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 126 char **ereport); 127static void spa_vdev_resilver_done(spa_t *spa); 128 129uint_t zio_taskq_batch_pct = 100; /* 1 thread per cpu in pset */ 130#ifdef PSRSET_BIND 131id_t zio_taskq_psrset_bind = PS_NONE; 132#endif 133#ifdef SYSDC 134boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ 135#endif 136uint_t zio_taskq_basedc = 80; /* base duty cycle */ 137 138boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ 139 140/* 141 * This (illegal) pool name is used when temporarily importing a spa_t in order 142 * to get the vdev stats associated with the imported devices. 143 */ 144#define TRYIMPORT_NAME "$import" 145 146/* 147 * ========================================================================== 148 * SPA properties routines 149 * ========================================================================== 150 */ 151 152/* 153 * Add a (source=src, propname=propval) list to an nvlist. 154 */ 155static void 156spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, 157 uint64_t intval, zprop_source_t src) 158{ 159 const char *propname = zpool_prop_to_name(prop); 160 nvlist_t *propval; 161 162 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); 163 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); 164 165 if (strval != NULL) 166 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); 167 else 168 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); 169 170 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); 171 nvlist_free(propval); 172} 173 174/* 175 * Get property values from the spa configuration. 176 */ 177static void 178spa_prop_get_config(spa_t *spa, nvlist_t **nvp) 179{ 180 vdev_t *rvd = spa->spa_root_vdev; 181 dsl_pool_t *pool = spa->spa_dsl_pool; 182 uint64_t size; 183 uint64_t alloc; 184 uint64_t space; 185 uint64_t cap, version; 186 zprop_source_t src = ZPROP_SRC_NONE; 187 spa_config_dirent_t *dp; 188 189 ASSERT(MUTEX_HELD(&spa->spa_props_lock)); 190 191 if (rvd != NULL) { 192 alloc = metaslab_class_get_alloc(spa_normal_class(spa)); 193 size = metaslab_class_get_space(spa_normal_class(spa)); 194 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); 195 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); 196 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); 197 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, 198 size - alloc, src); 199 200 space = 0; 201 for (int c = 0; c < rvd->vdev_children; c++) { 202 vdev_t *tvd = rvd->vdev_child[c]; 203 space += tvd->vdev_max_asize - tvd->vdev_asize; 204 } 205 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, space, 206 src); 207 208 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, 209 (spa_mode(spa) == FREAD), src); 210 211 cap = (size == 0) ? 0 : (alloc * 100 / size); 212 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); 213 214 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, 215 ddt_get_pool_dedup_ratio(spa), src); 216 217 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, 218 rvd->vdev_state, src); 219 220 version = spa_version(spa); 221 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) 222 src = ZPROP_SRC_DEFAULT; 223 else 224 src = ZPROP_SRC_LOCAL; 225 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src); 226 } 227 228 if (pool != NULL) { 229 dsl_dir_t *freedir = pool->dp_free_dir; 230 231 /* 232 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, 233 * when opening pools before this version freedir will be NULL. 234 */ 235 if (freedir != NULL) { 236 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, 237 freedir->dd_phys->dd_used_bytes, src); 238 } else { 239 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, 240 NULL, 0, src); 241 } 242 } 243 244 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); 245 246 if (spa->spa_comment != NULL) { 247 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, 248 0, ZPROP_SRC_LOCAL); 249 } 250 251 if (spa->spa_root != NULL) 252 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, 253 0, ZPROP_SRC_LOCAL); 254 255 if ((dp = list_head(&spa->spa_config_list)) != NULL) { 256 if (dp->scd_path == NULL) { 257 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 258 "none", 0, ZPROP_SRC_LOCAL); 259 } else if (strcmp(dp->scd_path, spa_config_path) != 0) { 260 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 261 dp->scd_path, 0, ZPROP_SRC_LOCAL); 262 } 263 } 264} 265 266/* 267 * Get zpool property values. 268 */ 269int 270spa_prop_get(spa_t *spa, nvlist_t **nvp) 271{ 272 objset_t *mos = spa->spa_meta_objset; 273 zap_cursor_t zc; 274 zap_attribute_t za; 275 int err; 276 277 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 278 279 mutex_enter(&spa->spa_props_lock); 280 281 /* 282 * Get properties from the spa config. 283 */ 284 spa_prop_get_config(spa, nvp); 285 286 /* If no pool property object, no more prop to get. */ 287 if (mos == NULL || spa->spa_pool_props_object == 0) { 288 mutex_exit(&spa->spa_props_lock); 289 return (0); 290 } 291 292 /* 293 * Get properties from the MOS pool property object. 294 */ 295 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); 296 (err = zap_cursor_retrieve(&zc, &za)) == 0; 297 zap_cursor_advance(&zc)) { 298 uint64_t intval = 0; 299 char *strval = NULL; 300 zprop_source_t src = ZPROP_SRC_DEFAULT; 301 zpool_prop_t prop; 302 303 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL) 304 continue; 305 306 switch (za.za_integer_length) { 307 case 8: 308 /* integer property */ 309 if (za.za_first_integer != 310 zpool_prop_default_numeric(prop)) 311 src = ZPROP_SRC_LOCAL; 312 313 if (prop == ZPOOL_PROP_BOOTFS) { 314 dsl_pool_t *dp; 315 dsl_dataset_t *ds = NULL; 316 317 dp = spa_get_dsl(spa); 318 rw_enter(&dp->dp_config_rwlock, RW_READER); 319 if (err = dsl_dataset_hold_obj(dp, 320 za.za_first_integer, FTAG, &ds)) { 321 rw_exit(&dp->dp_config_rwlock); 322 break; 323 } 324 325 strval = kmem_alloc( 326 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, 327 KM_SLEEP); 328 dsl_dataset_name(ds, strval); 329 dsl_dataset_rele(ds, FTAG); 330 rw_exit(&dp->dp_config_rwlock); 331 } else { 332 strval = NULL; 333 intval = za.za_first_integer; 334 } 335 336 spa_prop_add_list(*nvp, prop, strval, intval, src); 337 338 if (strval != NULL) 339 kmem_free(strval, 340 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); 341 342 break; 343 344 case 1: 345 /* string property */ 346 strval = kmem_alloc(za.za_num_integers, KM_SLEEP); 347 err = zap_lookup(mos, spa->spa_pool_props_object, 348 za.za_name, 1, za.za_num_integers, strval); 349 if (err) { 350 kmem_free(strval, za.za_num_integers); 351 break; 352 } 353 spa_prop_add_list(*nvp, prop, strval, 0, src); 354 kmem_free(strval, za.za_num_integers); 355 break; 356 357 default: 358 break; 359 } 360 } 361 zap_cursor_fini(&zc); 362 mutex_exit(&spa->spa_props_lock); 363out: 364 if (err && err != ENOENT) { 365 nvlist_free(*nvp); 366 *nvp = NULL; 367 return (err); 368 } 369 370 return (0); 371} 372 373/* 374 * Validate the given pool properties nvlist and modify the list 375 * for the property values to be set. 376 */ 377static int 378spa_prop_validate(spa_t *spa, nvlist_t *props) 379{ 380 nvpair_t *elem; 381 int error = 0, reset_bootfs = 0; 382 uint64_t objnum; 383 boolean_t has_feature = B_FALSE; 384 385 elem = NULL; 386 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 387 uint64_t intval; 388 char *strval, *slash, *check, *fname; 389 const char *propname = nvpair_name(elem); 390 zpool_prop_t prop = zpool_name_to_prop(propname); 391 392 switch (prop) { 393 case ZPROP_INVAL: 394 if (!zpool_prop_feature(propname)) { 395 error = EINVAL; 396 break; 397 } 398 399 /* 400 * Sanitize the input. 401 */ 402 if (nvpair_type(elem) != DATA_TYPE_UINT64) { 403 error = EINVAL; 404 break; 405 } 406 407 if (nvpair_value_uint64(elem, &intval) != 0) { 408 error = EINVAL; 409 break; 410 } 411 412 if (intval != 0) { 413 error = EINVAL; 414 break; 415 } 416 417 fname = strchr(propname, '@') + 1; 418 if (zfeature_lookup_name(fname, NULL) != 0) { 419 error = EINVAL; 420 break; 421 } 422 423 has_feature = B_TRUE; 424 break; 425 426 case ZPOOL_PROP_VERSION: 427 error = nvpair_value_uint64(elem, &intval); 428 if (!error && 429 (intval < spa_version(spa) || 430 intval > SPA_VERSION_BEFORE_FEATURES || 431 has_feature)) 432 error = EINVAL; 433 break; 434 435 case ZPOOL_PROP_DELEGATION: 436 case ZPOOL_PROP_AUTOREPLACE: 437 case ZPOOL_PROP_LISTSNAPS: 438 case ZPOOL_PROP_AUTOEXPAND: 439 error = nvpair_value_uint64(elem, &intval); 440 if (!error && intval > 1) 441 error = EINVAL; 442 break; 443 444 case ZPOOL_PROP_BOOTFS: 445 /* 446 * If the pool version is less than SPA_VERSION_BOOTFS, 447 * or the pool is still being created (version == 0), 448 * the bootfs property cannot be set. 449 */ 450 if (spa_version(spa) < SPA_VERSION_BOOTFS) { 451 error = ENOTSUP; 452 break; 453 } 454 455 /* 456 * Make sure the vdev config is bootable 457 */ 458 if (!vdev_is_bootable(spa->spa_root_vdev)) { 459 error = ENOTSUP; 460 break; 461 } 462 463 reset_bootfs = 1; 464 465 error = nvpair_value_string(elem, &strval); 466 467 if (!error) { 468 objset_t *os; 469 uint64_t compress; 470 471 if (strval == NULL || strval[0] == '\0') { 472 objnum = zpool_prop_default_numeric( 473 ZPOOL_PROP_BOOTFS); 474 break; 475 } 476 477 if (error = dmu_objset_hold(strval, FTAG, &os)) 478 break; 479 480 /* Must be ZPL and not gzip compressed. */ 481 482 if (dmu_objset_type(os) != DMU_OST_ZFS) { 483 error = ENOTSUP; 484 } else if ((error = dsl_prop_get_integer(strval, 485 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 486 &compress, NULL)) == 0 && 487 !BOOTFS_COMPRESS_VALID(compress)) { 488 error = ENOTSUP; 489 } else { 490 objnum = dmu_objset_id(os); 491 } 492 dmu_objset_rele(os, FTAG); 493 } 494 break; 495 496 case ZPOOL_PROP_FAILUREMODE: 497 error = nvpair_value_uint64(elem, &intval); 498 if (!error && (intval < ZIO_FAILURE_MODE_WAIT || 499 intval > ZIO_FAILURE_MODE_PANIC)) 500 error = EINVAL; 501 502 /* 503 * This is a special case which only occurs when 504 * the pool has completely failed. This allows 505 * the user to change the in-core failmode property 506 * without syncing it out to disk (I/Os might 507 * currently be blocked). We do this by returning 508 * EIO to the caller (spa_prop_set) to trick it 509 * into thinking we encountered a property validation 510 * error. 511 */ 512 if (!error && spa_suspended(spa)) { 513 spa->spa_failmode = intval; 514 error = EIO; 515 } 516 break; 517 518 case ZPOOL_PROP_CACHEFILE: 519 if ((error = nvpair_value_string(elem, &strval)) != 0) 520 break; 521 522 if (strval[0] == '\0') 523 break; 524 525 if (strcmp(strval, "none") == 0) 526 break; 527 528 if (strval[0] != '/') { 529 error = EINVAL; 530 break; 531 } 532 533 slash = strrchr(strval, '/'); 534 ASSERT(slash != NULL); 535 536 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 537 strcmp(slash, "/..") == 0) 538 error = EINVAL; 539 break; 540 541 case ZPOOL_PROP_COMMENT: 542 if ((error = nvpair_value_string(elem, &strval)) != 0) 543 break; 544 for (check = strval; *check != '\0'; check++) { 545 /* 546 * The kernel doesn't have an easy isprint() 547 * check. For this kernel check, we merely 548 * check ASCII apart from DEL. Fix this if 549 * there is an easy-to-use kernel isprint(). 550 */ 551 if (*check >= 0x7f) { 552 error = EINVAL; 553 break; 554 } 555 check++; 556 } 557 if (strlen(strval) > ZPROP_MAX_COMMENT) 558 error = E2BIG; 559 break; 560 561 case ZPOOL_PROP_DEDUPDITTO: 562 if (spa_version(spa) < SPA_VERSION_DEDUP) 563 error = ENOTSUP; 564 else 565 error = nvpair_value_uint64(elem, &intval); 566 if (error == 0 && 567 intval != 0 && intval < ZIO_DEDUPDITTO_MIN) 568 error = EINVAL; 569 break; 570 } 571 572 if (error) 573 break; 574 } 575 576 if (!error && reset_bootfs) { 577 error = nvlist_remove(props, 578 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); 579 580 if (!error) { 581 error = nvlist_add_uint64(props, 582 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); 583 } 584 } 585 586 return (error); 587} 588 589void 590spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) 591{ 592 char *cachefile; 593 spa_config_dirent_t *dp; 594 595 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), 596 &cachefile) != 0) 597 return; 598 599 dp = kmem_alloc(sizeof (spa_config_dirent_t), 600 KM_SLEEP); 601 602 if (cachefile[0] == '\0') 603 dp->scd_path = spa_strdup(spa_config_path); 604 else if (strcmp(cachefile, "none") == 0) 605 dp->scd_path = NULL; 606 else 607 dp->scd_path = spa_strdup(cachefile); 608 609 list_insert_head(&spa->spa_config_list, dp); 610 if (need_sync) 611 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 612} 613 614int 615spa_prop_set(spa_t *spa, nvlist_t *nvp) 616{ 617 int error; 618 nvpair_t *elem = NULL; 619 boolean_t need_sync = B_FALSE; 620 621 if ((error = spa_prop_validate(spa, nvp)) != 0) 622 return (error); 623 624 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { 625 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); 626 627 if (prop == ZPOOL_PROP_CACHEFILE || 628 prop == ZPOOL_PROP_ALTROOT || 629 prop == ZPOOL_PROP_READONLY) 630 continue; 631 632 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) { 633 uint64_t ver; 634 635 if (prop == ZPOOL_PROP_VERSION) { 636 VERIFY(nvpair_value_uint64(elem, &ver) == 0); 637 } else { 638 ASSERT(zpool_prop_feature(nvpair_name(elem))); 639 ver = SPA_VERSION_FEATURES; 640 need_sync = B_TRUE; 641 } 642 643 /* Save time if the version is already set. */ 644 if (ver == spa_version(spa)) 645 continue; 646 647 /* 648 * In addition to the pool directory object, we might 649 * create the pool properties object, the features for 650 * read object, the features for write object, or the 651 * feature descriptions object. 652 */ 653 error = dsl_sync_task_do(spa_get_dsl(spa), NULL, 654 spa_sync_version, spa, &ver, 6); 655 if (error) 656 return (error); 657 continue; 658 } 659 660 need_sync = B_TRUE; 661 break; 662 } 663 664 if (need_sync) { 665 return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props, 666 spa, nvp, 6)); 667 } 668 669 return (0); 670} 671 672/* 673 * If the bootfs property value is dsobj, clear it. 674 */ 675void 676spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) 677{ 678 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { 679 VERIFY(zap_remove(spa->spa_meta_objset, 680 spa->spa_pool_props_object, 681 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); 682 spa->spa_bootfs = 0; 683 } 684} 685 686/* 687 * Change the GUID for the pool. This is done so that we can later 688 * re-import a pool built from a clone of our own vdevs. We will modify 689 * the root vdev's guid, our own pool guid, and then mark all of our 690 * vdevs dirty. Note that we must make sure that all our vdevs are 691 * online when we do this, or else any vdevs that weren't present 692 * would be orphaned from our pool. We are also going to issue a 693 * sysevent to update any watchers. 694 */ 695int 696spa_change_guid(spa_t *spa) 697{ 698 uint64_t oldguid, newguid; 699 uint64_t txg; 700 701 if (!(spa_mode_global & FWRITE)) 702 return (EROFS); 703 704 txg = spa_vdev_enter(spa); 705 706 if (spa->spa_root_vdev->vdev_state != VDEV_STATE_HEALTHY) 707 return (spa_vdev_exit(spa, NULL, txg, ENXIO)); 708 709 oldguid = spa_guid(spa); 710 newguid = spa_generate_guid(NULL); 711 ASSERT3U(oldguid, !=, newguid); 712 713 spa->spa_root_vdev->vdev_guid = newguid; 714 spa->spa_root_vdev->vdev_guid_sum += (newguid - oldguid); 715 716 vdev_config_dirty(spa->spa_root_vdev); 717 718 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID); 719 720 return (spa_vdev_exit(spa, NULL, txg, 0)); 721} 722 723/* 724 * ========================================================================== 725 * SPA state manipulation (open/create/destroy/import/export) 726 * ========================================================================== 727 */ 728 729static int 730spa_error_entry_compare(const void *a, const void *b) 731{ 732 spa_error_entry_t *sa = (spa_error_entry_t *)a; 733 spa_error_entry_t *sb = (spa_error_entry_t *)b; 734 int ret; 735 736 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, 737 sizeof (zbookmark_t)); 738 739 if (ret < 0) 740 return (-1); 741 else if (ret > 0) 742 return (1); 743 else 744 return (0); 745} 746 747/* 748 * Utility function which retrieves copies of the current logs and 749 * re-initializes them in the process. 750 */ 751void 752spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 753{ 754 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); 755 756 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); 757 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); 758 759 avl_create(&spa->spa_errlist_scrub, 760 spa_error_entry_compare, sizeof (spa_error_entry_t), 761 offsetof(spa_error_entry_t, se_avl)); 762 avl_create(&spa->spa_errlist_last, 763 spa_error_entry_compare, sizeof (spa_error_entry_t), 764 offsetof(spa_error_entry_t, se_avl)); 765} 766 767static taskq_t * 768spa_taskq_create(spa_t *spa, const char *name, enum zti_modes mode, 769 uint_t value) 770{ 771 uint_t flags = TASKQ_PREPOPULATE; 772 boolean_t batch = B_FALSE; 773 774 switch (mode) { 775 case zti_mode_null: 776 return (NULL); /* no taskq needed */ 777 778 case zti_mode_fixed: 779 ASSERT3U(value, >=, 1); 780 value = MAX(value, 1); 781 break; 782 783 case zti_mode_batch: 784 batch = B_TRUE; 785 flags |= TASKQ_THREADS_CPU_PCT; 786 value = zio_taskq_batch_pct; 787 break; 788 789 case zti_mode_online_percent: 790 flags |= TASKQ_THREADS_CPU_PCT; 791 break; 792 793 default: 794 panic("unrecognized mode for %s taskq (%u:%u) in " 795 "spa_activate()", 796 name, mode, value); 797 break; 798 } 799 800#ifdef SYSDC 801 if (zio_taskq_sysdc && spa->spa_proc != &p0) { 802 if (batch) 803 flags |= TASKQ_DC_BATCH; 804 805 return (taskq_create_sysdc(name, value, 50, INT_MAX, 806 spa->spa_proc, zio_taskq_basedc, flags)); 807 } 808#endif 809 return (taskq_create_proc(name, value, maxclsyspri, 50, INT_MAX, 810 spa->spa_proc, flags)); 811} 812 813static void 814spa_create_zio_taskqs(spa_t *spa) 815{ 816 for (int t = 0; t < ZIO_TYPES; t++) { 817 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 818 const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; 819 enum zti_modes mode = ztip->zti_mode; 820 uint_t value = ztip->zti_value; 821 char name[32]; 822 823 (void) snprintf(name, sizeof (name), 824 "%s_%s", zio_type_name[t], zio_taskq_types[q]); 825 826 spa->spa_zio_taskq[t][q] = 827 spa_taskq_create(spa, name, mode, value); 828 } 829 } 830} 831 832#ifdef _KERNEL 833#ifdef SPA_PROCESS 834static void 835spa_thread(void *arg) 836{ 837 callb_cpr_t cprinfo; 838 839 spa_t *spa = arg; 840 user_t *pu = PTOU(curproc); 841 842 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 843 spa->spa_name); 844 845 ASSERT(curproc != &p0); 846 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 847 "zpool-%s", spa->spa_name); 848 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 849 850#ifdef PSRSET_BIND 851 /* bind this thread to the requested psrset */ 852 if (zio_taskq_psrset_bind != PS_NONE) { 853 pool_lock(); 854 mutex_enter(&cpu_lock); 855 mutex_enter(&pidlock); 856 mutex_enter(&curproc->p_lock); 857 858 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 859 0, NULL, NULL) == 0) { 860 curthread->t_bind_pset = zio_taskq_psrset_bind; 861 } else { 862 cmn_err(CE_WARN, 863 "Couldn't bind process for zfs pool \"%s\" to " 864 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 865 } 866 867 mutex_exit(&curproc->p_lock); 868 mutex_exit(&pidlock); 869 mutex_exit(&cpu_lock); 870 pool_unlock(); 871 } 872#endif 873 874#ifdef SYSDC 875 if (zio_taskq_sysdc) { 876 sysdc_thread_enter(curthread, 100, 0); 877 } 878#endif 879 880 spa->spa_proc = curproc; 881 spa->spa_did = curthread->t_did; 882 883 spa_create_zio_taskqs(spa); 884 885 mutex_enter(&spa->spa_proc_lock); 886 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 887 888 spa->spa_proc_state = SPA_PROC_ACTIVE; 889 cv_broadcast(&spa->spa_proc_cv); 890 891 CALLB_CPR_SAFE_BEGIN(&cprinfo); 892 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 893 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 894 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 895 896 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 897 spa->spa_proc_state = SPA_PROC_GONE; 898 spa->spa_proc = &p0; 899 cv_broadcast(&spa->spa_proc_cv); 900 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 901 902 mutex_enter(&curproc->p_lock); 903 lwp_exit(); 904} 905#endif /* SPA_PROCESS */ 906#endif 907 908/* 909 * Activate an uninitialized pool. 910 */ 911static void 912spa_activate(spa_t *spa, int mode) 913{ 914 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 915 916 spa->spa_state = POOL_STATE_ACTIVE; 917 spa->spa_mode = mode; 918 919 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 920 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 921 922 /* Try to create a covering process */ 923 mutex_enter(&spa->spa_proc_lock); 924 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 925 ASSERT(spa->spa_proc == &p0); 926 spa->spa_did = 0; 927 928#ifdef SPA_PROCESS 929 /* Only create a process if we're going to be around a while. */ 930 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 931 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 932 NULL, 0) == 0) { 933 spa->spa_proc_state = SPA_PROC_CREATED; 934 while (spa->spa_proc_state == SPA_PROC_CREATED) { 935 cv_wait(&spa->spa_proc_cv, 936 &spa->spa_proc_lock); 937 } 938 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 939 ASSERT(spa->spa_proc != &p0); 940 ASSERT(spa->spa_did != 0); 941 } else { 942#ifdef _KERNEL 943 cmn_err(CE_WARN, 944 "Couldn't create process for zfs pool \"%s\"\n", 945 spa->spa_name); 946#endif 947 } 948 } 949#endif /* SPA_PROCESS */ 950 mutex_exit(&spa->spa_proc_lock); 951 952 /* If we didn't create a process, we need to create our taskqs. */ 953 ASSERT(spa->spa_proc == &p0); 954 if (spa->spa_proc == &p0) { 955 spa_create_zio_taskqs(spa); 956 } 957 958 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 959 offsetof(vdev_t, vdev_config_dirty_node)); 960 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 961 offsetof(vdev_t, vdev_state_dirty_node)); 962 963 txg_list_create(&spa->spa_vdev_txg_list, 964 offsetof(struct vdev, vdev_txg_node)); 965 966 avl_create(&spa->spa_errlist_scrub, 967 spa_error_entry_compare, sizeof (spa_error_entry_t), 968 offsetof(spa_error_entry_t, se_avl)); 969 avl_create(&spa->spa_errlist_last, 970 spa_error_entry_compare, sizeof (spa_error_entry_t), 971 offsetof(spa_error_entry_t, se_avl)); 972} 973 974/* 975 * Opposite of spa_activate(). 976 */ 977static void 978spa_deactivate(spa_t *spa) 979{ 980 ASSERT(spa->spa_sync_on == B_FALSE); 981 ASSERT(spa->spa_dsl_pool == NULL); 982 ASSERT(spa->spa_root_vdev == NULL); 983 ASSERT(spa->spa_async_zio_root == NULL); 984 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 985 986 txg_list_destroy(&spa->spa_vdev_txg_list); 987 988 list_destroy(&spa->spa_config_dirty_list); 989 list_destroy(&spa->spa_state_dirty_list); 990 991 for (int t = 0; t < ZIO_TYPES; t++) { 992 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 993 if (spa->spa_zio_taskq[t][q] != NULL) 994 taskq_destroy(spa->spa_zio_taskq[t][q]); 995 spa->spa_zio_taskq[t][q] = NULL; 996 } 997 } 998 999 metaslab_class_destroy(spa->spa_normal_class); 1000 spa->spa_normal_class = NULL; 1001 1002 metaslab_class_destroy(spa->spa_log_class); 1003 spa->spa_log_class = NULL; 1004 1005 /* 1006 * If this was part of an import or the open otherwise failed, we may 1007 * still have errors left in the queues. Empty them just in case. 1008 */ 1009 spa_errlog_drain(spa); 1010 1011 avl_destroy(&spa->spa_errlist_scrub); 1012 avl_destroy(&spa->spa_errlist_last); 1013 1014 spa->spa_state = POOL_STATE_UNINITIALIZED; 1015 1016 mutex_enter(&spa->spa_proc_lock); 1017 if (spa->spa_proc_state != SPA_PROC_NONE) { 1018 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1019 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1020 cv_broadcast(&spa->spa_proc_cv); 1021 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1022 ASSERT(spa->spa_proc != &p0); 1023 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1024 } 1025 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1026 spa->spa_proc_state = SPA_PROC_NONE; 1027 } 1028 ASSERT(spa->spa_proc == &p0); 1029 mutex_exit(&spa->spa_proc_lock); 1030 1031#ifdef SPA_PROCESS 1032 /* 1033 * We want to make sure spa_thread() has actually exited the ZFS 1034 * module, so that the module can't be unloaded out from underneath 1035 * it. 1036 */ 1037 if (spa->spa_did != 0) { 1038 thread_join(spa->spa_did); 1039 spa->spa_did = 0; 1040 } 1041#endif /* SPA_PROCESS */ 1042} 1043 1044/* 1045 * Verify a pool configuration, and construct the vdev tree appropriately. This 1046 * will create all the necessary vdevs in the appropriate layout, with each vdev 1047 * in the CLOSED state. This will prep the pool before open/creation/import. 1048 * All vdev validation is done by the vdev_alloc() routine. 1049 */ 1050static int 1051spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1052 uint_t id, int atype) 1053{ 1054 nvlist_t **child; 1055 uint_t children; 1056 int error; 1057 1058 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1059 return (error); 1060 1061 if ((*vdp)->vdev_ops->vdev_op_leaf) 1062 return (0); 1063 1064 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1065 &child, &children); 1066 1067 if (error == ENOENT) 1068 return (0); 1069 1070 if (error) { 1071 vdev_free(*vdp); 1072 *vdp = NULL; 1073 return (EINVAL); 1074 } 1075 1076 for (int c = 0; c < children; c++) { 1077 vdev_t *vd; 1078 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1079 atype)) != 0) { 1080 vdev_free(*vdp); 1081 *vdp = NULL; 1082 return (error); 1083 } 1084 } 1085 1086 ASSERT(*vdp != NULL); 1087 1088 return (0); 1089} 1090 1091/* 1092 * Opposite of spa_load(). 1093 */ 1094static void 1095spa_unload(spa_t *spa) 1096{ 1097 int i; 1098 1099 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1100 1101 /* 1102 * Stop async tasks. 1103 */ 1104 spa_async_suspend(spa); 1105 1106 /* 1107 * Stop syncing. 1108 */ 1109 if (spa->spa_sync_on) { 1110 txg_sync_stop(spa->spa_dsl_pool); 1111 spa->spa_sync_on = B_FALSE; 1112 } 1113 1114 /* 1115 * Wait for any outstanding async I/O to complete. 1116 */ 1117 if (spa->spa_async_zio_root != NULL) { 1118 (void) zio_wait(spa->spa_async_zio_root); 1119 spa->spa_async_zio_root = NULL; 1120 } 1121 1122 bpobj_close(&spa->spa_deferred_bpobj); 1123 1124 /* 1125 * Close the dsl pool. 1126 */ 1127 if (spa->spa_dsl_pool) { 1128 dsl_pool_close(spa->spa_dsl_pool); 1129 spa->spa_dsl_pool = NULL; 1130 spa->spa_meta_objset = NULL; 1131 } 1132 1133 ddt_unload(spa); 1134 1135 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1136 1137 /* 1138 * Drop and purge level 2 cache 1139 */ 1140 spa_l2cache_drop(spa); 1141 1142 /* 1143 * Close all vdevs. 1144 */ 1145 if (spa->spa_root_vdev) 1146 vdev_free(spa->spa_root_vdev); 1147 ASSERT(spa->spa_root_vdev == NULL); 1148 1149 for (i = 0; i < spa->spa_spares.sav_count; i++) 1150 vdev_free(spa->spa_spares.sav_vdevs[i]); 1151 if (spa->spa_spares.sav_vdevs) { 1152 kmem_free(spa->spa_spares.sav_vdevs, 1153 spa->spa_spares.sav_count * sizeof (void *)); 1154 spa->spa_spares.sav_vdevs = NULL; 1155 } 1156 if (spa->spa_spares.sav_config) { 1157 nvlist_free(spa->spa_spares.sav_config); 1158 spa->spa_spares.sav_config = NULL; 1159 } 1160 spa->spa_spares.sav_count = 0; 1161 1162 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1163 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1164 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1165 } 1166 if (spa->spa_l2cache.sav_vdevs) { 1167 kmem_free(spa->spa_l2cache.sav_vdevs, 1168 spa->spa_l2cache.sav_count * sizeof (void *)); 1169 spa->spa_l2cache.sav_vdevs = NULL; 1170 } 1171 if (spa->spa_l2cache.sav_config) { 1172 nvlist_free(spa->spa_l2cache.sav_config); 1173 spa->spa_l2cache.sav_config = NULL; 1174 } 1175 spa->spa_l2cache.sav_count = 0; 1176 1177 spa->spa_async_suspended = 0; 1178 1179 if (spa->spa_comment != NULL) { 1180 spa_strfree(spa->spa_comment); 1181 spa->spa_comment = NULL; 1182 } 1183 1184 spa_config_exit(spa, SCL_ALL, FTAG); 1185} 1186 1187/* 1188 * Load (or re-load) the current list of vdevs describing the active spares for 1189 * this pool. When this is called, we have some form of basic information in 1190 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1191 * then re-generate a more complete list including status information. 1192 */ 1193static void 1194spa_load_spares(spa_t *spa) 1195{ 1196 nvlist_t **spares; 1197 uint_t nspares; 1198 int i; 1199 vdev_t *vd, *tvd; 1200 1201 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1202 1203 /* 1204 * First, close and free any existing spare vdevs. 1205 */ 1206 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1207 vd = spa->spa_spares.sav_vdevs[i]; 1208 1209 /* Undo the call to spa_activate() below */ 1210 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1211 B_FALSE)) != NULL && tvd->vdev_isspare) 1212 spa_spare_remove(tvd); 1213 vdev_close(vd); 1214 vdev_free(vd); 1215 } 1216 1217 if (spa->spa_spares.sav_vdevs) 1218 kmem_free(spa->spa_spares.sav_vdevs, 1219 spa->spa_spares.sav_count * sizeof (void *)); 1220 1221 if (spa->spa_spares.sav_config == NULL) 1222 nspares = 0; 1223 else 1224 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1225 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1226 1227 spa->spa_spares.sav_count = (int)nspares; 1228 spa->spa_spares.sav_vdevs = NULL; 1229 1230 if (nspares == 0) 1231 return; 1232 1233 /* 1234 * Construct the array of vdevs, opening them to get status in the 1235 * process. For each spare, there is potentially two different vdev_t 1236 * structures associated with it: one in the list of spares (used only 1237 * for basic validation purposes) and one in the active vdev 1238 * configuration (if it's spared in). During this phase we open and 1239 * validate each vdev on the spare list. If the vdev also exists in the 1240 * active configuration, then we also mark this vdev as an active spare. 1241 */ 1242 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1243 KM_SLEEP); 1244 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1245 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1246 VDEV_ALLOC_SPARE) == 0); 1247 ASSERT(vd != NULL); 1248 1249 spa->spa_spares.sav_vdevs[i] = vd; 1250 1251 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1252 B_FALSE)) != NULL) { 1253 if (!tvd->vdev_isspare) 1254 spa_spare_add(tvd); 1255 1256 /* 1257 * We only mark the spare active if we were successfully 1258 * able to load the vdev. Otherwise, importing a pool 1259 * with a bad active spare would result in strange 1260 * behavior, because multiple pool would think the spare 1261 * is actively in use. 1262 * 1263 * There is a vulnerability here to an equally bizarre 1264 * circumstance, where a dead active spare is later 1265 * brought back to life (onlined or otherwise). Given 1266 * the rarity of this scenario, and the extra complexity 1267 * it adds, we ignore the possibility. 1268 */ 1269 if (!vdev_is_dead(tvd)) 1270 spa_spare_activate(tvd); 1271 } 1272 1273 vd->vdev_top = vd; 1274 vd->vdev_aux = &spa->spa_spares; 1275 1276 if (vdev_open(vd) != 0) 1277 continue; 1278 1279 if (vdev_validate_aux(vd) == 0) 1280 spa_spare_add(vd); 1281 } 1282 1283 /* 1284 * Recompute the stashed list of spares, with status information 1285 * this time. 1286 */ 1287 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1288 DATA_TYPE_NVLIST_ARRAY) == 0); 1289 1290 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1291 KM_SLEEP); 1292 for (i = 0; i < spa->spa_spares.sav_count; i++) 1293 spares[i] = vdev_config_generate(spa, 1294 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1295 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1296 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1297 for (i = 0; i < spa->spa_spares.sav_count; i++) 1298 nvlist_free(spares[i]); 1299 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1300} 1301 1302/* 1303 * Load (or re-load) the current list of vdevs describing the active l2cache for 1304 * this pool. When this is called, we have some form of basic information in 1305 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1306 * then re-generate a more complete list including status information. 1307 * Devices which are already active have their details maintained, and are 1308 * not re-opened. 1309 */ 1310static void 1311spa_load_l2cache(spa_t *spa) 1312{ 1313 nvlist_t **l2cache; 1314 uint_t nl2cache; 1315 int i, j, oldnvdevs; 1316 uint64_t guid; 1317 vdev_t *vd, **oldvdevs, **newvdevs; 1318 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1319 1320 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1321 1322 if (sav->sav_config != NULL) { 1323 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1324 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1325 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1326 } else { 1327 nl2cache = 0; 1328 } 1329 1330 oldvdevs = sav->sav_vdevs; 1331 oldnvdevs = sav->sav_count; 1332 sav->sav_vdevs = NULL; 1333 sav->sav_count = 0; 1334 1335 /* 1336 * Process new nvlist of vdevs. 1337 */ 1338 for (i = 0; i < nl2cache; i++) { 1339 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1340 &guid) == 0); 1341 1342 newvdevs[i] = NULL; 1343 for (j = 0; j < oldnvdevs; j++) { 1344 vd = oldvdevs[j]; 1345 if (vd != NULL && guid == vd->vdev_guid) { 1346 /* 1347 * Retain previous vdev for add/remove ops. 1348 */ 1349 newvdevs[i] = vd; 1350 oldvdevs[j] = NULL; 1351 break; 1352 } 1353 } 1354 1355 if (newvdevs[i] == NULL) { 1356 /* 1357 * Create new vdev 1358 */ 1359 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1360 VDEV_ALLOC_L2CACHE) == 0); 1361 ASSERT(vd != NULL); 1362 newvdevs[i] = vd; 1363 1364 /* 1365 * Commit this vdev as an l2cache device, 1366 * even if it fails to open. 1367 */ 1368 spa_l2cache_add(vd); 1369 1370 vd->vdev_top = vd; 1371 vd->vdev_aux = sav; 1372 1373 spa_l2cache_activate(vd); 1374 1375 if (vdev_open(vd) != 0) 1376 continue; 1377 1378 (void) vdev_validate_aux(vd); 1379 1380 if (!vdev_is_dead(vd)) 1381 l2arc_add_vdev(spa, vd); 1382 } 1383 } 1384 1385 /* 1386 * Purge vdevs that were dropped 1387 */ 1388 for (i = 0; i < oldnvdevs; i++) { 1389 uint64_t pool; 1390 1391 vd = oldvdevs[i]; 1392 if (vd != NULL) { 1393 ASSERT(vd->vdev_isl2cache); 1394 1395 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1396 pool != 0ULL && l2arc_vdev_present(vd)) 1397 l2arc_remove_vdev(vd); 1398 vdev_clear_stats(vd); 1399 vdev_free(vd); 1400 } 1401 } 1402 1403 if (oldvdevs) 1404 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1405 1406 if (sav->sav_config == NULL) 1407 goto out; 1408 1409 sav->sav_vdevs = newvdevs; 1410 sav->sav_count = (int)nl2cache; 1411 1412 /* 1413 * Recompute the stashed list of l2cache devices, with status 1414 * information this time. 1415 */ 1416 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1417 DATA_TYPE_NVLIST_ARRAY) == 0); 1418 1419 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1420 for (i = 0; i < sav->sav_count; i++) 1421 l2cache[i] = vdev_config_generate(spa, 1422 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1423 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1424 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1425out: 1426 for (i = 0; i < sav->sav_count; i++) 1427 nvlist_free(l2cache[i]); 1428 if (sav->sav_count) 1429 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1430} 1431 1432static int 1433load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1434{ 1435 dmu_buf_t *db; 1436 char *packed = NULL; 1437 size_t nvsize = 0; 1438 int error; 1439 *value = NULL; 1440 1441 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 1442 nvsize = *(uint64_t *)db->db_data; 1443 dmu_buf_rele(db, FTAG); 1444 1445 packed = kmem_alloc(nvsize, KM_SLEEP); 1446 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1447 DMU_READ_PREFETCH); 1448 if (error == 0) 1449 error = nvlist_unpack(packed, nvsize, value, 0); 1450 kmem_free(packed, nvsize); 1451 1452 return (error); 1453} 1454 1455/* 1456 * Checks to see if the given vdev could not be opened, in which case we post a 1457 * sysevent to notify the autoreplace code that the device has been removed. 1458 */ 1459static void 1460spa_check_removed(vdev_t *vd) 1461{ 1462 for (int c = 0; c < vd->vdev_children; c++) 1463 spa_check_removed(vd->vdev_child[c]); 1464 1465 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd)) { 1466 zfs_post_autoreplace(vd->vdev_spa, vd); 1467 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); 1468 } 1469} 1470 1471/* 1472 * Validate the current config against the MOS config 1473 */ 1474static boolean_t 1475spa_config_valid(spa_t *spa, nvlist_t *config) 1476{ 1477 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 1478 nvlist_t *nv; 1479 1480 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); 1481 1482 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1483 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 1484 1485 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); 1486 1487 /* 1488 * If we're doing a normal import, then build up any additional 1489 * diagnostic information about missing devices in this config. 1490 * We'll pass this up to the user for further processing. 1491 */ 1492 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1493 nvlist_t **child, *nv; 1494 uint64_t idx = 0; 1495 1496 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1497 KM_SLEEP); 1498 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1499 1500 for (int c = 0; c < rvd->vdev_children; c++) { 1501 vdev_t *tvd = rvd->vdev_child[c]; 1502 vdev_t *mtvd = mrvd->vdev_child[c]; 1503 1504 if (tvd->vdev_ops == &vdev_missing_ops && 1505 mtvd->vdev_ops != &vdev_missing_ops && 1506 mtvd->vdev_islog) 1507 child[idx++] = vdev_config_generate(spa, mtvd, 1508 B_FALSE, 0); 1509 } 1510 1511 if (idx) { 1512 VERIFY(nvlist_add_nvlist_array(nv, 1513 ZPOOL_CONFIG_CHILDREN, child, idx) == 0); 1514 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 1515 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); 1516 1517 for (int i = 0; i < idx; i++) 1518 nvlist_free(child[i]); 1519 } 1520 nvlist_free(nv); 1521 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1522 } 1523 1524 /* 1525 * Compare the root vdev tree with the information we have 1526 * from the MOS config (mrvd). Check each top-level vdev 1527 * with the corresponding MOS config top-level (mtvd). 1528 */ 1529 for (int c = 0; c < rvd->vdev_children; c++) { 1530 vdev_t *tvd = rvd->vdev_child[c]; 1531 vdev_t *mtvd = mrvd->vdev_child[c]; 1532 1533 /* 1534 * Resolve any "missing" vdevs in the current configuration. 1535 * If we find that the MOS config has more accurate information 1536 * about the top-level vdev then use that vdev instead. 1537 */ 1538 if (tvd->vdev_ops == &vdev_missing_ops && 1539 mtvd->vdev_ops != &vdev_missing_ops) { 1540 1541 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) 1542 continue; 1543 1544 /* 1545 * Device specific actions. 1546 */ 1547 if (mtvd->vdev_islog) { 1548 spa_set_log_state(spa, SPA_LOG_CLEAR); 1549 } else { 1550 /* 1551 * XXX - once we have 'readonly' pool 1552 * support we should be able to handle 1553 * missing data devices by transitioning 1554 * the pool to readonly. 1555 */ 1556 continue; 1557 } 1558 1559 /* 1560 * Swap the missing vdev with the data we were 1561 * able to obtain from the MOS config. 1562 */ 1563 vdev_remove_child(rvd, tvd); 1564 vdev_remove_child(mrvd, mtvd); 1565 1566 vdev_add_child(rvd, mtvd); 1567 vdev_add_child(mrvd, tvd); 1568 1569 spa_config_exit(spa, SCL_ALL, FTAG); 1570 vdev_load(mtvd); 1571 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1572 1573 vdev_reopen(rvd); 1574 } else if (mtvd->vdev_islog) { 1575 /* 1576 * Load the slog device's state from the MOS config 1577 * since it's possible that the label does not 1578 * contain the most up-to-date information. 1579 */ 1580 vdev_load_log_state(tvd, mtvd); 1581 vdev_reopen(tvd); 1582 } 1583 } 1584 vdev_free(mrvd); 1585 spa_config_exit(spa, SCL_ALL, FTAG); 1586 1587 /* 1588 * Ensure we were able to validate the config. 1589 */ 1590 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); 1591} 1592 1593/* 1594 * Check for missing log devices 1595 */ 1596static int 1597spa_check_logs(spa_t *spa) 1598{ 1599 switch (spa->spa_log_state) { 1600 case SPA_LOG_MISSING: 1601 /* need to recheck in case slog has been restored */ 1602 case SPA_LOG_UNKNOWN: 1603 if (dmu_objset_find(spa->spa_name, zil_check_log_chain, NULL, 1604 DS_FIND_CHILDREN)) { 1605 spa_set_log_state(spa, SPA_LOG_MISSING); 1606 return (1); 1607 } 1608 break; 1609 } 1610 return (0); 1611} 1612 1613static boolean_t 1614spa_passivate_log(spa_t *spa) 1615{ 1616 vdev_t *rvd = spa->spa_root_vdev; 1617 boolean_t slog_found = B_FALSE; 1618 1619 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1620 1621 if (!spa_has_slogs(spa)) 1622 return (B_FALSE); 1623 1624 for (int c = 0; c < rvd->vdev_children; c++) { 1625 vdev_t *tvd = rvd->vdev_child[c]; 1626 metaslab_group_t *mg = tvd->vdev_mg; 1627 1628 if (tvd->vdev_islog) { 1629 metaslab_group_passivate(mg); 1630 slog_found = B_TRUE; 1631 } 1632 } 1633 1634 return (slog_found); 1635} 1636 1637static void 1638spa_activate_log(spa_t *spa) 1639{ 1640 vdev_t *rvd = spa->spa_root_vdev; 1641 1642 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1643 1644 for (int c = 0; c < rvd->vdev_children; c++) { 1645 vdev_t *tvd = rvd->vdev_child[c]; 1646 metaslab_group_t *mg = tvd->vdev_mg; 1647 1648 if (tvd->vdev_islog) 1649 metaslab_group_activate(mg); 1650 } 1651} 1652 1653int 1654spa_offline_log(spa_t *spa) 1655{ 1656 int error = 0; 1657 1658 if ((error = dmu_objset_find(spa_name(spa), zil_vdev_offline, 1659 NULL, DS_FIND_CHILDREN)) == 0) { 1660 1661 /* 1662 * We successfully offlined the log device, sync out the 1663 * current txg so that the "stubby" block can be removed 1664 * by zil_sync(). 1665 */ 1666 txg_wait_synced(spa->spa_dsl_pool, 0); 1667 } 1668 return (error); 1669} 1670 1671static void 1672spa_aux_check_removed(spa_aux_vdev_t *sav) 1673{ 1674 int i; 1675 1676 for (i = 0; i < sav->sav_count; i++) 1677 spa_check_removed(sav->sav_vdevs[i]); 1678} 1679 1680void 1681spa_claim_notify(zio_t *zio) 1682{ 1683 spa_t *spa = zio->io_spa; 1684 1685 if (zio->io_error) 1686 return; 1687 1688 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1689 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1690 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1691 mutex_exit(&spa->spa_props_lock); 1692} 1693 1694typedef struct spa_load_error { 1695 uint64_t sle_meta_count; 1696 uint64_t sle_data_count; 1697} spa_load_error_t; 1698 1699static void 1700spa_load_verify_done(zio_t *zio) 1701{ 1702 blkptr_t *bp = zio->io_bp; 1703 spa_load_error_t *sle = zio->io_private; 1704 dmu_object_type_t type = BP_GET_TYPE(bp); 1705 int error = zio->io_error; 1706 1707 if (error) { 1708 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 1709 type != DMU_OT_INTENT_LOG) 1710 atomic_add_64(&sle->sle_meta_count, 1); 1711 else 1712 atomic_add_64(&sle->sle_data_count, 1); 1713 } 1714 zio_data_buf_free(zio->io_data, zio->io_size); 1715} 1716 1717/*ARGSUSED*/ 1718static int 1719spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1720 arc_buf_t *pbuf, const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg) 1721{ 1722 if (bp != NULL) { 1723 zio_t *rio = arg; 1724 size_t size = BP_GET_PSIZE(bp); 1725 void *data = zio_data_buf_alloc(size); 1726 1727 zio_nowait(zio_read(rio, spa, bp, data, size, 1728 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 1729 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 1730 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 1731 } 1732 return (0); 1733} 1734 1735static int 1736spa_load_verify(spa_t *spa) 1737{ 1738 zio_t *rio; 1739 spa_load_error_t sle = { 0 }; 1740 zpool_rewind_policy_t policy; 1741 boolean_t verify_ok = B_FALSE; 1742 int error; 1743 1744 zpool_get_rewind_policy(spa->spa_config, &policy); 1745 1746 if (policy.zrp_request & ZPOOL_NEVER_REWIND) 1747 return (0); 1748 1749 rio = zio_root(spa, NULL, &sle, 1750 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 1751 1752 error = traverse_pool(spa, spa->spa_verify_min_txg, 1753 TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio); 1754 1755 (void) zio_wait(rio); 1756 1757 spa->spa_load_meta_errors = sle.sle_meta_count; 1758 spa->spa_load_data_errors = sle.sle_data_count; 1759 1760 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && 1761 sle.sle_data_count <= policy.zrp_maxdata) { 1762 int64_t loss = 0; 1763 1764 verify_ok = B_TRUE; 1765 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 1766 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 1767 1768 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 1769 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1770 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 1771 VERIFY(nvlist_add_int64(spa->spa_load_info, 1772 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 1773 VERIFY(nvlist_add_uint64(spa->spa_load_info, 1774 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 1775 } else { 1776 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 1777 } 1778 1779 if (error) { 1780 if (error != ENXIO && error != EIO) 1781 error = EIO; 1782 return (error); 1783 } 1784 1785 return (verify_ok ? 0 : EIO); 1786} 1787 1788/* 1789 * Find a value in the pool props object. 1790 */ 1791static void 1792spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 1793{ 1794 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 1795 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 1796} 1797 1798/* 1799 * Find a value in the pool directory object. 1800 */ 1801static int 1802spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) 1803{ 1804 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 1805 name, sizeof (uint64_t), 1, val)); 1806} 1807 1808static int 1809spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 1810{ 1811 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 1812 return (err); 1813} 1814 1815/* 1816 * Fix up config after a partly-completed split. This is done with the 1817 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 1818 * pool have that entry in their config, but only the splitting one contains 1819 * a list of all the guids of the vdevs that are being split off. 1820 * 1821 * This function determines what to do with that list: either rejoin 1822 * all the disks to the pool, or complete the splitting process. To attempt 1823 * the rejoin, each disk that is offlined is marked online again, and 1824 * we do a reopen() call. If the vdev label for every disk that was 1825 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 1826 * then we call vdev_split() on each disk, and complete the split. 1827 * 1828 * Otherwise we leave the config alone, with all the vdevs in place in 1829 * the original pool. 1830 */ 1831static void 1832spa_try_repair(spa_t *spa, nvlist_t *config) 1833{ 1834 uint_t extracted; 1835 uint64_t *glist; 1836 uint_t i, gcount; 1837 nvlist_t *nvl; 1838 vdev_t **vd; 1839 boolean_t attempt_reopen; 1840 1841 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 1842 return; 1843 1844 /* check that the config is complete */ 1845 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 1846 &glist, &gcount) != 0) 1847 return; 1848 1849 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 1850 1851 /* attempt to online all the vdevs & validate */ 1852 attempt_reopen = B_TRUE; 1853 for (i = 0; i < gcount; i++) { 1854 if (glist[i] == 0) /* vdev is hole */ 1855 continue; 1856 1857 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 1858 if (vd[i] == NULL) { 1859 /* 1860 * Don't bother attempting to reopen the disks; 1861 * just do the split. 1862 */ 1863 attempt_reopen = B_FALSE; 1864 } else { 1865 /* attempt to re-online it */ 1866 vd[i]->vdev_offline = B_FALSE; 1867 } 1868 } 1869 1870 if (attempt_reopen) { 1871 vdev_reopen(spa->spa_root_vdev); 1872 1873 /* check each device to see what state it's in */ 1874 for (extracted = 0, i = 0; i < gcount; i++) { 1875 if (vd[i] != NULL && 1876 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 1877 break; 1878 ++extracted; 1879 } 1880 } 1881 1882 /* 1883 * If every disk has been moved to the new pool, or if we never 1884 * even attempted to look at them, then we split them off for 1885 * good. 1886 */ 1887 if (!attempt_reopen || gcount == extracted) { 1888 for (i = 0; i < gcount; i++) 1889 if (vd[i] != NULL) 1890 vdev_split(vd[i]); 1891 vdev_reopen(spa->spa_root_vdev); 1892 } 1893 1894 kmem_free(vd, gcount * sizeof (vdev_t *)); 1895} 1896 1897static int 1898spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, 1899 boolean_t mosconfig) 1900{ 1901 nvlist_t *config = spa->spa_config; 1902 char *ereport = FM_EREPORT_ZFS_POOL; 1903 char *comment; 1904 int error; 1905 uint64_t pool_guid; 1906 nvlist_t *nvl; 1907 1908 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) 1909 return (EINVAL); 1910 1911 ASSERT(spa->spa_comment == NULL); 1912 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 1913 spa->spa_comment = spa_strdup(comment); 1914 1915 /* 1916 * Versioning wasn't explicitly added to the label until later, so if 1917 * it's not present treat it as the initial version. 1918 */ 1919 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 1920 &spa->spa_ubsync.ub_version) != 0) 1921 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 1922 1923 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 1924 &spa->spa_config_txg); 1925 1926 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && 1927 spa_guid_exists(pool_guid, 0)) { 1928 error = EEXIST; 1929 } else { 1930 spa->spa_config_guid = pool_guid; 1931 1932 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, 1933 &nvl) == 0) { 1934 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, 1935 KM_SLEEP) == 0); 1936 } 1937 1938 nvlist_free(spa->spa_load_info); 1939 spa->spa_load_info = fnvlist_alloc(); 1940 1941 gethrestime(&spa->spa_loaded_ts); 1942 error = spa_load_impl(spa, pool_guid, config, state, type, 1943 mosconfig, &ereport); 1944 } 1945 1946 spa->spa_minref = refcount_count(&spa->spa_refcount); 1947 if (error) { 1948 if (error != EEXIST) { 1949 spa->spa_loaded_ts.tv_sec = 0; 1950 spa->spa_loaded_ts.tv_nsec = 0; 1951 } 1952 if (error != EBADF) { 1953 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); 1954 } 1955 } 1956 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 1957 spa->spa_ena = 0; 1958 1959 return (error); 1960} 1961 1962/* 1963 * Load an existing storage pool, using the pool's builtin spa_config as a 1964 * source of configuration information. 1965 */ 1966static int 1967spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, 1968 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 1969 char **ereport) 1970{ 1971 int error = 0; 1972 nvlist_t *nvroot = NULL; 1973 nvlist_t *label; 1974 vdev_t *rvd; 1975 uberblock_t *ub = &spa->spa_uberblock; 1976 uint64_t children, config_cache_txg = spa->spa_config_txg; 1977 int orig_mode = spa->spa_mode; 1978 int parse; 1979 uint64_t obj; 1980 boolean_t missing_feat_write = B_FALSE; 1981 1982 /* 1983 * If this is an untrusted config, access the pool in read-only mode. 1984 * This prevents things like resilvering recently removed devices. 1985 */ 1986 if (!mosconfig) 1987 spa->spa_mode = FREAD; 1988 1989 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1990 1991 spa->spa_load_state = state; 1992 1993 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) 1994 return (EINVAL); 1995 1996 parse = (type == SPA_IMPORT_EXISTING ? 1997 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 1998 1999 /* 2000 * Create "The Godfather" zio to hold all async IOs 2001 */ 2002 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 2003 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 2004 2005 /* 2006 * Parse the configuration into a vdev tree. We explicitly set the 2007 * value that will be returned by spa_version() since parsing the 2008 * configuration requires knowing the version number. 2009 */ 2010 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2011 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); 2012 spa_config_exit(spa, SCL_ALL, FTAG); 2013 2014 if (error != 0) 2015 return (error); 2016 2017 ASSERT(spa->spa_root_vdev == rvd); 2018 2019 if (type != SPA_IMPORT_ASSEMBLE) { 2020 ASSERT(spa_guid(spa) == pool_guid); 2021 } 2022 2023 /* 2024 * Try to open all vdevs, loading each label in the process. 2025 */ 2026 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2027 error = vdev_open(rvd); 2028 spa_config_exit(spa, SCL_ALL, FTAG); 2029 if (error != 0) 2030 return (error); 2031 2032 /* 2033 * We need to validate the vdev labels against the configuration that 2034 * we have in hand, which is dependent on the setting of mosconfig. If 2035 * mosconfig is true then we're validating the vdev labels based on 2036 * that config. Otherwise, we're validating against the cached config 2037 * (zpool.cache) that was read when we loaded the zfs module, and then 2038 * later we will recursively call spa_load() and validate against 2039 * the vdev config. 2040 * 2041 * If we're assembling a new pool that's been split off from an 2042 * existing pool, the labels haven't yet been updated so we skip 2043 * validation for now. 2044 */ 2045 if (type != SPA_IMPORT_ASSEMBLE) { 2046 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2047 error = vdev_validate(rvd, mosconfig); 2048 spa_config_exit(spa, SCL_ALL, FTAG); 2049 2050 if (error != 0) 2051 return (error); 2052 2053 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2054 return (ENXIO); 2055 } 2056 2057 /* 2058 * Find the best uberblock. 2059 */ 2060 vdev_uberblock_load(rvd, ub, &label); 2061 2062 /* 2063 * If we weren't able to find a single valid uberblock, return failure. 2064 */ 2065 if (ub->ub_txg == 0) { 2066 nvlist_free(label); 2067 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2068 } 2069 2070 /* 2071 * If the pool has an unsupported version we can't open it. 2072 */ 2073 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2074 nvlist_free(label); 2075 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2076 } 2077 2078 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2079 nvlist_t *features; 2080 2081 /* 2082 * If we weren't able to find what's necessary for reading the 2083 * MOS in the label, return failure. 2084 */ 2085 if (label == NULL || nvlist_lookup_nvlist(label, 2086 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { 2087 nvlist_free(label); 2088 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2089 ENXIO)); 2090 } 2091 2092 /* 2093 * Update our in-core representation with the definitive values 2094 * from the label. 2095 */ 2096 nvlist_free(spa->spa_label_features); 2097 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2098 } 2099 2100 nvlist_free(label); 2101 2102 /* 2103 * Look through entries in the label nvlist's features_for_read. If 2104 * there is a feature listed there which we don't understand then we 2105 * cannot open a pool. 2106 */ 2107 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2108 nvlist_t *unsup_feat; 2109 2110 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2111 0); 2112 2113 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2114 NULL); nvp != NULL; 2115 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2116 if (!zfeature_is_supported(nvpair_name(nvp))) { 2117 VERIFY(nvlist_add_string(unsup_feat, 2118 nvpair_name(nvp), "") == 0); 2119 } 2120 } 2121 2122 if (!nvlist_empty(unsup_feat)) { 2123 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2124 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2125 nvlist_free(unsup_feat); 2126 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2127 ENOTSUP)); 2128 } 2129 2130 nvlist_free(unsup_feat); 2131 } 2132 2133 /* 2134 * If the vdev guid sum doesn't match the uberblock, we have an 2135 * incomplete configuration. We first check to see if the pool 2136 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). 2137 * If it is, defer the vdev_guid_sum check till later so we 2138 * can handle missing vdevs. 2139 */ 2140 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, 2141 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && 2142 rvd->vdev_guid_sum != ub->ub_guid_sum) 2143 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 2144 2145 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2146 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2147 spa_try_repair(spa, config); 2148 spa_config_exit(spa, SCL_ALL, FTAG); 2149 nvlist_free(spa->spa_config_splitting); 2150 spa->spa_config_splitting = NULL; 2151 } 2152 2153 /* 2154 * Initialize internal SPA structures. 2155 */ 2156 spa->spa_state = POOL_STATE_ACTIVE; 2157 spa->spa_ubsync = spa->spa_uberblock; 2158 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2159 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2160 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2161 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2162 spa->spa_claim_max_txg = spa->spa_first_txg; 2163 spa->spa_prev_software_version = ub->ub_software_version; 2164 2165 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2166 if (error) 2167 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2168 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2169 2170 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) 2171 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2172 2173 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 2174 boolean_t missing_feat_read = B_FALSE; 2175 nvlist_t *unsup_feat, *enabled_feat; 2176 2177 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 2178 &spa->spa_feat_for_read_obj) != 0) { 2179 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2180 } 2181 2182 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 2183 &spa->spa_feat_for_write_obj) != 0) { 2184 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2185 } 2186 2187 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 2188 &spa->spa_feat_desc_obj) != 0) { 2189 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2190 } 2191 2192 enabled_feat = fnvlist_alloc(); 2193 unsup_feat = fnvlist_alloc(); 2194 2195 if (!feature_is_supported(spa->spa_meta_objset, 2196 spa->spa_feat_for_read_obj, spa->spa_feat_desc_obj, 2197 unsup_feat, enabled_feat)) 2198 missing_feat_read = B_TRUE; 2199 2200 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { 2201 if (!feature_is_supported(spa->spa_meta_objset, 2202 spa->spa_feat_for_write_obj, spa->spa_feat_desc_obj, 2203 unsup_feat, enabled_feat)) { 2204 missing_feat_write = B_TRUE; 2205 } 2206 } 2207 2208 fnvlist_add_nvlist(spa->spa_load_info, 2209 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 2210 2211 if (!nvlist_empty(unsup_feat)) { 2212 fnvlist_add_nvlist(spa->spa_load_info, 2213 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 2214 } 2215 2216 fnvlist_free(enabled_feat); 2217 fnvlist_free(unsup_feat); 2218 2219 if (!missing_feat_read) { 2220 fnvlist_add_boolean(spa->spa_load_info, 2221 ZPOOL_CONFIG_CAN_RDONLY); 2222 } 2223 2224 /* 2225 * If the state is SPA_LOAD_TRYIMPORT, our objective is 2226 * twofold: to determine whether the pool is available for 2227 * import in read-write mode and (if it is not) whether the 2228 * pool is available for import in read-only mode. If the pool 2229 * is available for import in read-write mode, it is displayed 2230 * as available in userland; if it is not available for import 2231 * in read-only mode, it is displayed as unavailable in 2232 * userland. If the pool is available for import in read-only 2233 * mode but not read-write mode, it is displayed as unavailable 2234 * in userland with a special note that the pool is actually 2235 * available for open in read-only mode. 2236 * 2237 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 2238 * missing a feature for write, we must first determine whether 2239 * the pool can be opened read-only before returning to 2240 * userland in order to know whether to display the 2241 * abovementioned note. 2242 */ 2243 if (missing_feat_read || (missing_feat_write && 2244 spa_writeable(spa))) { 2245 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2246 ENOTSUP)); 2247 } 2248 } 2249 2250 spa->spa_is_initializing = B_TRUE; 2251 error = dsl_pool_open(spa->spa_dsl_pool); 2252 spa->spa_is_initializing = B_FALSE; 2253 if (error != 0) 2254 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2255 2256 if (!mosconfig) { 2257 uint64_t hostid; 2258 nvlist_t *policy = NULL, *nvconfig; 2259 2260 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2261 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2262 2263 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, 2264 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2265 char *hostname; 2266 unsigned long myhostid = 0; 2267 2268 VERIFY(nvlist_lookup_string(nvconfig, 2269 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); 2270 2271#ifdef _KERNEL 2272 myhostid = zone_get_hostid(NULL); 2273#else /* _KERNEL */ 2274 /* 2275 * We're emulating the system's hostid in userland, so 2276 * we can't use zone_get_hostid(). 2277 */ 2278 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); 2279#endif /* _KERNEL */ 2280 if (check_hostid && hostid != 0 && myhostid != 0 && 2281 hostid != myhostid) { 2282 nvlist_free(nvconfig); 2283 cmn_err(CE_WARN, "pool '%s' could not be " 2284 "loaded as it was last accessed by " 2285 "another system (host: %s hostid: 0x%lx). " 2286 "See: http://illumos.org/msg/ZFS-8000-EY", 2287 spa_name(spa), hostname, 2288 (unsigned long)hostid); 2289 return (EBADF); 2290 } 2291 } 2292 if (nvlist_lookup_nvlist(spa->spa_config, 2293 ZPOOL_REWIND_POLICY, &policy) == 0) 2294 VERIFY(nvlist_add_nvlist(nvconfig, 2295 ZPOOL_REWIND_POLICY, policy) == 0); 2296 2297 spa_config_set(spa, nvconfig); 2298 spa_unload(spa); 2299 spa_deactivate(spa); 2300 spa_activate(spa, orig_mode); 2301 2302 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); 2303 } 2304 2305 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) 2306 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2307 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 2308 if (error != 0) 2309 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2310 2311 /* 2312 * Load the bit that tells us to use the new accounting function 2313 * (raid-z deflation). If we have an older pool, this will not 2314 * be present. 2315 */ 2316 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); 2317 if (error != 0 && error != ENOENT) 2318 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2319 2320 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 2321 &spa->spa_creation_version); 2322 if (error != 0 && error != ENOENT) 2323 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2324 2325 /* 2326 * Load the persistent error log. If we have an older pool, this will 2327 * not be present. 2328 */ 2329 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); 2330 if (error != 0 && error != ENOENT) 2331 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2332 2333 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 2334 &spa->spa_errlog_scrub); 2335 if (error != 0 && error != ENOENT) 2336 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2337 2338 /* 2339 * Load the history object. If we have an older pool, this 2340 * will not be present. 2341 */ 2342 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); 2343 if (error != 0 && error != ENOENT) 2344 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2345 2346 /* 2347 * If we're assembling the pool from the split-off vdevs of 2348 * an existing pool, we don't want to attach the spares & cache 2349 * devices. 2350 */ 2351 2352 /* 2353 * Load any hot spares for this pool. 2354 */ 2355 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); 2356 if (error != 0 && error != ENOENT) 2357 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2358 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2359 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 2360 if (load_nvlist(spa, spa->spa_spares.sav_object, 2361 &spa->spa_spares.sav_config) != 0) 2362 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2363 2364 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2365 spa_load_spares(spa); 2366 spa_config_exit(spa, SCL_ALL, FTAG); 2367 } else if (error == 0) { 2368 spa->spa_spares.sav_sync = B_TRUE; 2369 } 2370 2371 /* 2372 * Load any level 2 ARC devices for this pool. 2373 */ 2374 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 2375 &spa->spa_l2cache.sav_object); 2376 if (error != 0 && error != ENOENT) 2377 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2378 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2379 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 2380 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 2381 &spa->spa_l2cache.sav_config) != 0) 2382 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2383 2384 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2385 spa_load_l2cache(spa); 2386 spa_config_exit(spa, SCL_ALL, FTAG); 2387 } else if (error == 0) { 2388 spa->spa_l2cache.sav_sync = B_TRUE; 2389 } 2390 2391 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 2392 2393 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); 2394 if (error && error != ENOENT) 2395 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2396 2397 if (error == 0) { 2398 uint64_t autoreplace; 2399 2400 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 2401 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 2402 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 2403 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 2404 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 2405 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 2406 &spa->spa_dedup_ditto); 2407 2408 spa->spa_autoreplace = (autoreplace != 0); 2409 } 2410 2411 /* 2412 * If the 'autoreplace' property is set, then post a resource notifying 2413 * the ZFS DE that it should not issue any faults for unopenable 2414 * devices. We also iterate over the vdevs, and post a sysevent for any 2415 * unopenable vdevs so that the normal autoreplace handler can take 2416 * over. 2417 */ 2418 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { 2419 spa_check_removed(spa->spa_root_vdev); 2420 /* 2421 * For the import case, this is done in spa_import(), because 2422 * at this point we're using the spare definitions from 2423 * the MOS config, not necessarily from the userland config. 2424 */ 2425 if (state != SPA_LOAD_IMPORT) { 2426 spa_aux_check_removed(&spa->spa_spares); 2427 spa_aux_check_removed(&spa->spa_l2cache); 2428 } 2429 } 2430 2431 /* 2432 * Load the vdev state for all toplevel vdevs. 2433 */ 2434 vdev_load(rvd); 2435 2436 /* 2437 * Propagate the leaf DTLs we just loaded all the way up the tree. 2438 */ 2439 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2440 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 2441 spa_config_exit(spa, SCL_ALL, FTAG); 2442 2443 /* 2444 * Load the DDTs (dedup tables). 2445 */ 2446 error = ddt_load(spa); 2447 if (error != 0) 2448 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2449 2450 spa_update_dspace(spa); 2451 2452 /* 2453 * Validate the config, using the MOS config to fill in any 2454 * information which might be missing. If we fail to validate 2455 * the config then declare the pool unfit for use. If we're 2456 * assembling a pool from a split, the log is not transferred 2457 * over. 2458 */ 2459 if (type != SPA_IMPORT_ASSEMBLE) { 2460 nvlist_t *nvconfig; 2461 2462 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2463 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2464 2465 if (!spa_config_valid(spa, nvconfig)) { 2466 nvlist_free(nvconfig); 2467 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 2468 ENXIO)); 2469 } 2470 nvlist_free(nvconfig); 2471 2472 /* 2473 * Now that we've validated the config, check the state of the 2474 * root vdev. If it can't be opened, it indicates one or 2475 * more toplevel vdevs are faulted. 2476 */ 2477 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2478 return (ENXIO); 2479 2480 if (spa_check_logs(spa)) { 2481 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 2482 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); 2483 } 2484 } 2485 2486 if (missing_feat_write) { 2487 ASSERT(state == SPA_LOAD_TRYIMPORT); 2488 2489 /* 2490 * At this point, we know that we can open the pool in 2491 * read-only mode but not read-write mode. We now have enough 2492 * information and can return to userland. 2493 */ 2494 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); 2495 } 2496 2497 /* 2498 * We've successfully opened the pool, verify that we're ready 2499 * to start pushing transactions. 2500 */ 2501 if (state != SPA_LOAD_TRYIMPORT) { 2502 if (error = spa_load_verify(spa)) 2503 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2504 error)); 2505 } 2506 2507 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || 2508 spa->spa_load_max_txg == UINT64_MAX)) { 2509 dmu_tx_t *tx; 2510 int need_update = B_FALSE; 2511 2512 ASSERT(state != SPA_LOAD_TRYIMPORT); 2513 2514 /* 2515 * Claim log blocks that haven't been committed yet. 2516 * This must all happen in a single txg. 2517 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 2518 * invoked from zil_claim_log_block()'s i/o done callback. 2519 * Price of rollback is that we abandon the log. 2520 */ 2521 spa->spa_claiming = B_TRUE; 2522 2523 tx = dmu_tx_create_assigned(spa_get_dsl(spa), 2524 spa_first_txg(spa)); 2525 (void) dmu_objset_find(spa_name(spa), 2526 zil_claim, tx, DS_FIND_CHILDREN); 2527 dmu_tx_commit(tx); 2528 2529 spa->spa_claiming = B_FALSE; 2530 2531 spa_set_log_state(spa, SPA_LOG_GOOD); 2532 spa->spa_sync_on = B_TRUE; 2533 txg_sync_start(spa->spa_dsl_pool); 2534 2535 /* 2536 * Wait for all claims to sync. We sync up to the highest 2537 * claimed log block birth time so that claimed log blocks 2538 * don't appear to be from the future. spa_claim_max_txg 2539 * will have been set for us by either zil_check_log_chain() 2540 * (invoked from spa_check_logs()) or zil_claim() above. 2541 */ 2542 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 2543 2544 /* 2545 * If the config cache is stale, or we have uninitialized 2546 * metaslabs (see spa_vdev_add()), then update the config. 2547 * 2548 * If this is a verbatim import, trust the current 2549 * in-core spa_config and update the disk labels. 2550 */ 2551 if (config_cache_txg != spa->spa_config_txg || 2552 state == SPA_LOAD_IMPORT || 2553 state == SPA_LOAD_RECOVER || 2554 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 2555 need_update = B_TRUE; 2556 2557 for (int c = 0; c < rvd->vdev_children; c++) 2558 if (rvd->vdev_child[c]->vdev_ms_array == 0) 2559 need_update = B_TRUE; 2560 2561 /* 2562 * Update the config cache asychronously in case we're the 2563 * root pool, in which case the config cache isn't writable yet. 2564 */ 2565 if (need_update) 2566 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2567 2568 /* 2569 * Check all DTLs to see if anything needs resilvering. 2570 */ 2571 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 2572 vdev_resilver_needed(rvd, NULL, NULL)) 2573 spa_async_request(spa, SPA_ASYNC_RESILVER); 2574 2575 /* 2576 * Delete any inconsistent datasets. 2577 */ 2578 (void) dmu_objset_find(spa_name(spa), 2579 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 2580 2581 /* 2582 * Clean up any stale temporary dataset userrefs. 2583 */ 2584 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 2585 } 2586 2587 return (0); 2588} 2589 2590static int 2591spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) 2592{ 2593 int mode = spa->spa_mode; 2594 2595 spa_unload(spa); 2596 spa_deactivate(spa); 2597 2598 spa->spa_load_max_txg--; 2599 2600 spa_activate(spa, mode); 2601 spa_async_suspend(spa); 2602 2603 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); 2604} 2605 2606/* 2607 * If spa_load() fails this function will try loading prior txg's. If 2608 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 2609 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 2610 * function will not rewind the pool and will return the same error as 2611 * spa_load(). 2612 */ 2613static int 2614spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, 2615 uint64_t max_request, int rewind_flags) 2616{ 2617 nvlist_t *loadinfo = NULL; 2618 nvlist_t *config = NULL; 2619 int load_error, rewind_error; 2620 uint64_t safe_rewind_txg; 2621 uint64_t min_txg; 2622 2623 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 2624 spa->spa_load_max_txg = spa->spa_load_txg; 2625 spa_set_log_state(spa, SPA_LOG_CLEAR); 2626 } else { 2627 spa->spa_load_max_txg = max_request; 2628 } 2629 2630 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, 2631 mosconfig); 2632 if (load_error == 0) 2633 return (0); 2634 2635 if (spa->spa_root_vdev != NULL) 2636 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2637 2638 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 2639 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 2640 2641 if (rewind_flags & ZPOOL_NEVER_REWIND) { 2642 nvlist_free(config); 2643 return (load_error); 2644 } 2645 2646 if (state == SPA_LOAD_RECOVER) { 2647 /* Price of rolling back is discarding txgs, including log */ 2648 spa_set_log_state(spa, SPA_LOG_CLEAR); 2649 } else { 2650 /* 2651 * If we aren't rolling back save the load info from our first 2652 * import attempt so that we can restore it after attempting 2653 * to rewind. 2654 */ 2655 loadinfo = spa->spa_load_info; 2656 spa->spa_load_info = fnvlist_alloc(); 2657 } 2658 2659 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 2660 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 2661 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 2662 TXG_INITIAL : safe_rewind_txg; 2663 2664 /* 2665 * Continue as long as we're finding errors, we're still within 2666 * the acceptable rewind range, and we're still finding uberblocks 2667 */ 2668 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 2669 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 2670 if (spa->spa_load_max_txg < safe_rewind_txg) 2671 spa->spa_extreme_rewind = B_TRUE; 2672 rewind_error = spa_load_retry(spa, state, mosconfig); 2673 } 2674 2675 spa->spa_extreme_rewind = B_FALSE; 2676 spa->spa_load_max_txg = UINT64_MAX; 2677 2678 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 2679 spa_config_set(spa, config); 2680 2681 if (state == SPA_LOAD_RECOVER) { 2682 ASSERT3P(loadinfo, ==, NULL); 2683 return (rewind_error); 2684 } else { 2685 /* Store the rewind info as part of the initial load info */ 2686 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 2687 spa->spa_load_info); 2688 2689 /* Restore the initial load info */ 2690 fnvlist_free(spa->spa_load_info); 2691 spa->spa_load_info = loadinfo; 2692 2693 return (load_error); 2694 } 2695} 2696 2697/* 2698 * Pool Open/Import 2699 * 2700 * The import case is identical to an open except that the configuration is sent 2701 * down from userland, instead of grabbed from the configuration cache. For the 2702 * case of an open, the pool configuration will exist in the 2703 * POOL_STATE_UNINITIALIZED state. 2704 * 2705 * The stats information (gen/count/ustats) is used to gather vdev statistics at 2706 * the same time open the pool, without having to keep around the spa_t in some 2707 * ambiguous state. 2708 */ 2709static int 2710spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 2711 nvlist_t **config) 2712{ 2713 spa_t *spa; 2714 spa_load_state_t state = SPA_LOAD_OPEN; 2715 int error; 2716 int locked = B_FALSE; 2717 int firstopen = B_FALSE; 2718 2719 *spapp = NULL; 2720 2721 /* 2722 * As disgusting as this is, we need to support recursive calls to this 2723 * function because dsl_dir_open() is called during spa_load(), and ends 2724 * up calling spa_open() again. The real fix is to figure out how to 2725 * avoid dsl_dir_open() calling this in the first place. 2726 */ 2727 if (mutex_owner(&spa_namespace_lock) != curthread) { 2728 mutex_enter(&spa_namespace_lock); 2729 locked = B_TRUE; 2730 } 2731 2732 if ((spa = spa_lookup(pool)) == NULL) { 2733 if (locked) 2734 mutex_exit(&spa_namespace_lock); 2735 return (ENOENT); 2736 } 2737 2738 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 2739 zpool_rewind_policy_t policy; 2740 2741 firstopen = B_TRUE; 2742 2743 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, 2744 &policy); 2745 if (policy.zrp_request & ZPOOL_DO_REWIND) 2746 state = SPA_LOAD_RECOVER; 2747 2748 spa_activate(spa, spa_mode_global); 2749 2750 if (state != SPA_LOAD_RECOVER) 2751 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 2752 2753 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, 2754 policy.zrp_request); 2755 2756 if (error == EBADF) { 2757 /* 2758 * If vdev_validate() returns failure (indicated by 2759 * EBADF), it indicates that one of the vdevs indicates 2760 * that the pool has been exported or destroyed. If 2761 * this is the case, the config cache is out of sync and 2762 * we should remove the pool from the namespace. 2763 */ 2764 spa_unload(spa); 2765 spa_deactivate(spa); 2766 spa_config_sync(spa, B_TRUE, B_TRUE); 2767 spa_remove(spa); 2768 if (locked) 2769 mutex_exit(&spa_namespace_lock); 2770 return (ENOENT); 2771 } 2772 2773 if (error) { 2774 /* 2775 * We can't open the pool, but we still have useful 2776 * information: the state of each vdev after the 2777 * attempted vdev_open(). Return this to the user. 2778 */ 2779 if (config != NULL && spa->spa_config) { 2780 VERIFY(nvlist_dup(spa->spa_config, config, 2781 KM_SLEEP) == 0); 2782 VERIFY(nvlist_add_nvlist(*config, 2783 ZPOOL_CONFIG_LOAD_INFO, 2784 spa->spa_load_info) == 0); 2785 } 2786 spa_unload(spa); 2787 spa_deactivate(spa); 2788 spa->spa_last_open_failed = error; 2789 if (locked) 2790 mutex_exit(&spa_namespace_lock); 2791 *spapp = NULL; 2792 return (error); 2793 } 2794 } 2795 2796 spa_open_ref(spa, tag); 2797 2798 if (config != NULL) 2799 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 2800 2801 /* 2802 * If we've recovered the pool, pass back any information we 2803 * gathered while doing the load. 2804 */ 2805 if (state == SPA_LOAD_RECOVER) { 2806 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 2807 spa->spa_load_info) == 0); 2808 } 2809 2810 if (locked) { 2811 spa->spa_last_open_failed = 0; 2812 spa->spa_last_ubsync_txg = 0; 2813 spa->spa_load_txg = 0; 2814 mutex_exit(&spa_namespace_lock); 2815#ifdef __FreeBSD__ 2816#ifdef _KERNEL 2817 if (firstopen) 2818 zvol_create_minors(pool); 2819#endif 2820#endif 2821 } 2822 2823 *spapp = spa; 2824 2825 return (0); 2826} 2827 2828int 2829spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 2830 nvlist_t **config) 2831{ 2832 return (spa_open_common(name, spapp, tag, policy, config)); 2833} 2834 2835int 2836spa_open(const char *name, spa_t **spapp, void *tag) 2837{ 2838 return (spa_open_common(name, spapp, tag, NULL, NULL)); 2839} 2840 2841/* 2842 * Lookup the given spa_t, incrementing the inject count in the process, 2843 * preventing it from being exported or destroyed. 2844 */ 2845spa_t * 2846spa_inject_addref(char *name) 2847{ 2848 spa_t *spa; 2849 2850 mutex_enter(&spa_namespace_lock); 2851 if ((spa = spa_lookup(name)) == NULL) { 2852 mutex_exit(&spa_namespace_lock); 2853 return (NULL); 2854 } 2855 spa->spa_inject_ref++; 2856 mutex_exit(&spa_namespace_lock); 2857 2858 return (spa); 2859} 2860 2861void 2862spa_inject_delref(spa_t *spa) 2863{ 2864 mutex_enter(&spa_namespace_lock); 2865 spa->spa_inject_ref--; 2866 mutex_exit(&spa_namespace_lock); 2867} 2868 2869/* 2870 * Add spares device information to the nvlist. 2871 */ 2872static void 2873spa_add_spares(spa_t *spa, nvlist_t *config) 2874{ 2875 nvlist_t **spares; 2876 uint_t i, nspares; 2877 nvlist_t *nvroot; 2878 uint64_t guid; 2879 vdev_stat_t *vs; 2880 uint_t vsc; 2881 uint64_t pool; 2882 2883 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 2884 2885 if (spa->spa_spares.sav_count == 0) 2886 return; 2887 2888 VERIFY(nvlist_lookup_nvlist(config, 2889 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 2890 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 2891 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 2892 if (nspares != 0) { 2893 VERIFY(nvlist_add_nvlist_array(nvroot, 2894 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 2895 VERIFY(nvlist_lookup_nvlist_array(nvroot, 2896 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 2897 2898 /* 2899 * Go through and find any spares which have since been 2900 * repurposed as an active spare. If this is the case, update 2901 * their status appropriately. 2902 */ 2903 for (i = 0; i < nspares; i++) { 2904 VERIFY(nvlist_lookup_uint64(spares[i], 2905 ZPOOL_CONFIG_GUID, &guid) == 0); 2906 if (spa_spare_exists(guid, &pool, NULL) && 2907 pool != 0ULL) { 2908 VERIFY(nvlist_lookup_uint64_array( 2909 spares[i], ZPOOL_CONFIG_VDEV_STATS, 2910 (uint64_t **)&vs, &vsc) == 0); 2911 vs->vs_state = VDEV_STATE_CANT_OPEN; 2912 vs->vs_aux = VDEV_AUX_SPARED; 2913 } 2914 } 2915 } 2916} 2917 2918/* 2919 * Add l2cache device information to the nvlist, including vdev stats. 2920 */ 2921static void 2922spa_add_l2cache(spa_t *spa, nvlist_t *config) 2923{ 2924 nvlist_t **l2cache; 2925 uint_t i, j, nl2cache; 2926 nvlist_t *nvroot; 2927 uint64_t guid; 2928 vdev_t *vd; 2929 vdev_stat_t *vs; 2930 uint_t vsc; 2931 2932 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 2933 2934 if (spa->spa_l2cache.sav_count == 0) 2935 return; 2936 2937 VERIFY(nvlist_lookup_nvlist(config, 2938 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 2939 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 2940 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 2941 if (nl2cache != 0) { 2942 VERIFY(nvlist_add_nvlist_array(nvroot, 2943 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 2944 VERIFY(nvlist_lookup_nvlist_array(nvroot, 2945 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 2946 2947 /* 2948 * Update level 2 cache device stats. 2949 */ 2950 2951 for (i = 0; i < nl2cache; i++) { 2952 VERIFY(nvlist_lookup_uint64(l2cache[i], 2953 ZPOOL_CONFIG_GUID, &guid) == 0); 2954 2955 vd = NULL; 2956 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 2957 if (guid == 2958 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 2959 vd = spa->spa_l2cache.sav_vdevs[j]; 2960 break; 2961 } 2962 } 2963 ASSERT(vd != NULL); 2964 2965 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 2966 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 2967 == 0); 2968 vdev_get_stats(vd, vs); 2969 } 2970 } 2971} 2972 2973static void 2974spa_add_feature_stats(spa_t *spa, nvlist_t *config) 2975{ 2976 nvlist_t *features; 2977 zap_cursor_t zc; 2978 zap_attribute_t za; 2979 2980 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 2981 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 2982 2983 if (spa->spa_feat_for_read_obj != 0) { 2984 for (zap_cursor_init(&zc, spa->spa_meta_objset, 2985 spa->spa_feat_for_read_obj); 2986 zap_cursor_retrieve(&zc, &za) == 0; 2987 zap_cursor_advance(&zc)) { 2988 ASSERT(za.za_integer_length == sizeof (uint64_t) && 2989 za.za_num_integers == 1); 2990 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 2991 za.za_first_integer)); 2992 } 2993 zap_cursor_fini(&zc); 2994 } 2995 2996 if (spa->spa_feat_for_write_obj != 0) { 2997 for (zap_cursor_init(&zc, spa->spa_meta_objset, 2998 spa->spa_feat_for_write_obj); 2999 zap_cursor_retrieve(&zc, &za) == 0; 3000 zap_cursor_advance(&zc)) { 3001 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3002 za.za_num_integers == 1); 3003 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3004 za.za_first_integer)); 3005 } 3006 zap_cursor_fini(&zc); 3007 } 3008 3009 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 3010 features) == 0); 3011 nvlist_free(features); 3012} 3013 3014int 3015spa_get_stats(const char *name, nvlist_t **config, 3016 char *altroot, size_t buflen) 3017{ 3018 int error; 3019 spa_t *spa; 3020 3021 *config = NULL; 3022 error = spa_open_common(name, &spa, FTAG, NULL, config); 3023 3024 if (spa != NULL) { 3025 /* 3026 * This still leaves a window of inconsistency where the spares 3027 * or l2cache devices could change and the config would be 3028 * self-inconsistent. 3029 */ 3030 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3031 3032 if (*config != NULL) { 3033 uint64_t loadtimes[2]; 3034 3035 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 3036 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 3037 VERIFY(nvlist_add_uint64_array(*config, 3038 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 3039 3040 VERIFY(nvlist_add_uint64(*config, 3041 ZPOOL_CONFIG_ERRCOUNT, 3042 spa_get_errlog_size(spa)) == 0); 3043 3044 if (spa_suspended(spa)) 3045 VERIFY(nvlist_add_uint64(*config, 3046 ZPOOL_CONFIG_SUSPENDED, 3047 spa->spa_failmode) == 0); 3048 3049 spa_add_spares(spa, *config); 3050 spa_add_l2cache(spa, *config); 3051 spa_add_feature_stats(spa, *config); 3052 } 3053 } 3054 3055 /* 3056 * We want to get the alternate root even for faulted pools, so we cheat 3057 * and call spa_lookup() directly. 3058 */ 3059 if (altroot) { 3060 if (spa == NULL) { 3061 mutex_enter(&spa_namespace_lock); 3062 spa = spa_lookup(name); 3063 if (spa) 3064 spa_altroot(spa, altroot, buflen); 3065 else 3066 altroot[0] = '\0'; 3067 spa = NULL; 3068 mutex_exit(&spa_namespace_lock); 3069 } else { 3070 spa_altroot(spa, altroot, buflen); 3071 } 3072 } 3073 3074 if (spa != NULL) { 3075 spa_config_exit(spa, SCL_CONFIG, FTAG); 3076 spa_close(spa, FTAG); 3077 } 3078 3079 return (error); 3080} 3081 3082/* 3083 * Validate that the auxiliary device array is well formed. We must have an 3084 * array of nvlists, each which describes a valid leaf vdev. If this is an 3085 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 3086 * specified, as long as they are well-formed. 3087 */ 3088static int 3089spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 3090 spa_aux_vdev_t *sav, const char *config, uint64_t version, 3091 vdev_labeltype_t label) 3092{ 3093 nvlist_t **dev; 3094 uint_t i, ndev; 3095 vdev_t *vd; 3096 int error; 3097 3098 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3099 3100 /* 3101 * It's acceptable to have no devs specified. 3102 */ 3103 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 3104 return (0); 3105 3106 if (ndev == 0) 3107 return (EINVAL); 3108 3109 /* 3110 * Make sure the pool is formatted with a version that supports this 3111 * device type. 3112 */ 3113 if (spa_version(spa) < version) 3114 return (ENOTSUP); 3115 3116 /* 3117 * Set the pending device list so we correctly handle device in-use 3118 * checking. 3119 */ 3120 sav->sav_pending = dev; 3121 sav->sav_npending = ndev; 3122 3123 for (i = 0; i < ndev; i++) { 3124 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 3125 mode)) != 0) 3126 goto out; 3127 3128 if (!vd->vdev_ops->vdev_op_leaf) { 3129 vdev_free(vd); 3130 error = EINVAL; 3131 goto out; 3132 } 3133 3134 /* 3135 * The L2ARC currently only supports disk devices in 3136 * kernel context. For user-level testing, we allow it. 3137 */ 3138#ifdef _KERNEL 3139 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && 3140 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { 3141 error = ENOTBLK; 3142 vdev_free(vd); 3143 goto out; 3144 } 3145#endif 3146 vd->vdev_top = vd; 3147 3148 if ((error = vdev_open(vd)) == 0 && 3149 (error = vdev_label_init(vd, crtxg, label)) == 0) { 3150 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 3151 vd->vdev_guid) == 0); 3152 } 3153 3154 vdev_free(vd); 3155 3156 if (error && 3157 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 3158 goto out; 3159 else 3160 error = 0; 3161 } 3162 3163out: 3164 sav->sav_pending = NULL; 3165 sav->sav_npending = 0; 3166 return (error); 3167} 3168 3169static int 3170spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 3171{ 3172 int error; 3173 3174 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3175 3176 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3177 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 3178 VDEV_LABEL_SPARE)) != 0) { 3179 return (error); 3180 } 3181 3182 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3183 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 3184 VDEV_LABEL_L2CACHE)); 3185} 3186 3187static void 3188spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 3189 const char *config) 3190{ 3191 int i; 3192 3193 if (sav->sav_config != NULL) { 3194 nvlist_t **olddevs; 3195 uint_t oldndevs; 3196 nvlist_t **newdevs; 3197 3198 /* 3199 * Generate new dev list by concatentating with the 3200 * current dev list. 3201 */ 3202 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 3203 &olddevs, &oldndevs) == 0); 3204 3205 newdevs = kmem_alloc(sizeof (void *) * 3206 (ndevs + oldndevs), KM_SLEEP); 3207 for (i = 0; i < oldndevs; i++) 3208 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 3209 KM_SLEEP) == 0); 3210 for (i = 0; i < ndevs; i++) 3211 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 3212 KM_SLEEP) == 0); 3213 3214 VERIFY(nvlist_remove(sav->sav_config, config, 3215 DATA_TYPE_NVLIST_ARRAY) == 0); 3216 3217 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 3218 config, newdevs, ndevs + oldndevs) == 0); 3219 for (i = 0; i < oldndevs + ndevs; i++) 3220 nvlist_free(newdevs[i]); 3221 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 3222 } else { 3223 /* 3224 * Generate a new dev list. 3225 */ 3226 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 3227 KM_SLEEP) == 0); 3228 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 3229 devs, ndevs) == 0); 3230 } 3231} 3232 3233/* 3234 * Stop and drop level 2 ARC devices 3235 */ 3236void 3237spa_l2cache_drop(spa_t *spa) 3238{ 3239 vdev_t *vd; 3240 int i; 3241 spa_aux_vdev_t *sav = &spa->spa_l2cache; 3242 3243 for (i = 0; i < sav->sav_count; i++) { 3244 uint64_t pool; 3245 3246 vd = sav->sav_vdevs[i]; 3247 ASSERT(vd != NULL); 3248 3249 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 3250 pool != 0ULL && l2arc_vdev_present(vd)) 3251 l2arc_remove_vdev(vd); 3252 } 3253} 3254 3255/* 3256 * Pool Creation 3257 */ 3258int 3259spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 3260 const char *history_str, nvlist_t *zplprops) 3261{ 3262 spa_t *spa; 3263 char *altroot = NULL; 3264 vdev_t *rvd; 3265 dsl_pool_t *dp; 3266 dmu_tx_t *tx; 3267 int error = 0; 3268 uint64_t txg = TXG_INITIAL; 3269 nvlist_t **spares, **l2cache; 3270 uint_t nspares, nl2cache; 3271 uint64_t version, obj; 3272 boolean_t has_features; 3273 3274 /* 3275 * If this pool already exists, return failure. 3276 */ 3277 mutex_enter(&spa_namespace_lock); 3278 if (spa_lookup(pool) != NULL) { 3279 mutex_exit(&spa_namespace_lock); 3280 return (EEXIST); 3281 } 3282 3283 /* 3284 * Allocate a new spa_t structure. 3285 */ 3286 (void) nvlist_lookup_string(props, 3287 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3288 spa = spa_add(pool, NULL, altroot); 3289 spa_activate(spa, spa_mode_global); 3290 3291 if (props && (error = spa_prop_validate(spa, props))) { 3292 spa_deactivate(spa); 3293 spa_remove(spa); 3294 mutex_exit(&spa_namespace_lock); 3295 return (error); 3296 } 3297 3298 has_features = B_FALSE; 3299 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 3300 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 3301 if (zpool_prop_feature(nvpair_name(elem))) 3302 has_features = B_TRUE; 3303 } 3304 3305 if (has_features || nvlist_lookup_uint64(props, 3306 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 3307 version = SPA_VERSION; 3308 } 3309 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 3310 3311 spa->spa_first_txg = txg; 3312 spa->spa_uberblock.ub_txg = txg - 1; 3313 spa->spa_uberblock.ub_version = version; 3314 spa->spa_ubsync = spa->spa_uberblock; 3315 3316 /* 3317 * Create "The Godfather" zio to hold all async IOs 3318 */ 3319 spa->spa_async_zio_root = zio_root(spa, NULL, NULL, 3320 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER); 3321 3322 /* 3323 * Create the root vdev. 3324 */ 3325 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3326 3327 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 3328 3329 ASSERT(error != 0 || rvd != NULL); 3330 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 3331 3332 if (error == 0 && !zfs_allocatable_devs(nvroot)) 3333 error = EINVAL; 3334 3335 if (error == 0 && 3336 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 3337 (error = spa_validate_aux(spa, nvroot, txg, 3338 VDEV_ALLOC_ADD)) == 0) { 3339 for (int c = 0; c < rvd->vdev_children; c++) { 3340 vdev_metaslab_set_size(rvd->vdev_child[c]); 3341 vdev_expand(rvd->vdev_child[c], txg); 3342 } 3343 } 3344 3345 spa_config_exit(spa, SCL_ALL, FTAG); 3346 3347 if (error != 0) { 3348 spa_unload(spa); 3349 spa_deactivate(spa); 3350 spa_remove(spa); 3351 mutex_exit(&spa_namespace_lock); 3352 return (error); 3353 } 3354 3355 /* 3356 * Get the list of spares, if specified. 3357 */ 3358 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3359 &spares, &nspares) == 0) { 3360 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 3361 KM_SLEEP) == 0); 3362 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3363 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3364 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3365 spa_load_spares(spa); 3366 spa_config_exit(spa, SCL_ALL, FTAG); 3367 spa->spa_spares.sav_sync = B_TRUE; 3368 } 3369 3370 /* 3371 * Get the list of level 2 cache devices, if specified. 3372 */ 3373 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3374 &l2cache, &nl2cache) == 0) { 3375 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3376 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3377 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3378 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3379 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3380 spa_load_l2cache(spa); 3381 spa_config_exit(spa, SCL_ALL, FTAG); 3382 spa->spa_l2cache.sav_sync = B_TRUE; 3383 } 3384 3385 spa->spa_is_initializing = B_TRUE; 3386 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); 3387 spa->spa_meta_objset = dp->dp_meta_objset; 3388 spa->spa_is_initializing = B_FALSE; 3389 3390 /* 3391 * Create DDTs (dedup tables). 3392 */ 3393 ddt_create(spa); 3394 3395 spa_update_dspace(spa); 3396 3397 tx = dmu_tx_create_assigned(dp, txg); 3398 3399 /* 3400 * Create the pool config object. 3401 */ 3402 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 3403 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 3404 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 3405 3406 if (zap_add(spa->spa_meta_objset, 3407 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 3408 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 3409 cmn_err(CE_PANIC, "failed to add pool config"); 3410 } 3411 3412 if (spa_version(spa) >= SPA_VERSION_FEATURES) 3413 spa_feature_create_zap_objects(spa, tx); 3414 3415 if (zap_add(spa->spa_meta_objset, 3416 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 3417 sizeof (uint64_t), 1, &version, tx) != 0) { 3418 cmn_err(CE_PANIC, "failed to add pool version"); 3419 } 3420 3421 /* Newly created pools with the right version are always deflated. */ 3422 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 3423 spa->spa_deflate = TRUE; 3424 if (zap_add(spa->spa_meta_objset, 3425 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 3426 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 3427 cmn_err(CE_PANIC, "failed to add deflate"); 3428 } 3429 } 3430 3431 /* 3432 * Create the deferred-free bpobj. Turn off compression 3433 * because sync-to-convergence takes longer if the blocksize 3434 * keeps changing. 3435 */ 3436 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 3437 dmu_object_set_compress(spa->spa_meta_objset, obj, 3438 ZIO_COMPRESS_OFF, tx); 3439 if (zap_add(spa->spa_meta_objset, 3440 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 3441 sizeof (uint64_t), 1, &obj, tx) != 0) { 3442 cmn_err(CE_PANIC, "failed to add bpobj"); 3443 } 3444 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 3445 spa->spa_meta_objset, obj)); 3446 3447 /* 3448 * Create the pool's history object. 3449 */ 3450 if (version >= SPA_VERSION_ZPOOL_HISTORY) 3451 spa_history_create_obj(spa, tx); 3452 3453 /* 3454 * Set pool properties. 3455 */ 3456 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 3457 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3458 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 3459 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 3460 3461 if (props != NULL) { 3462 spa_configfile_set(spa, props, B_FALSE); 3463 spa_sync_props(spa, props, tx); 3464 } 3465 3466 dmu_tx_commit(tx); 3467 3468 spa->spa_sync_on = B_TRUE; 3469 txg_sync_start(spa->spa_dsl_pool); 3470 3471 /* 3472 * We explicitly wait for the first transaction to complete so that our 3473 * bean counters are appropriately updated. 3474 */ 3475 txg_wait_synced(spa->spa_dsl_pool, txg); 3476 3477 spa_config_sync(spa, B_FALSE, B_TRUE); 3478 3479 if (version >= SPA_VERSION_ZPOOL_HISTORY && history_str != NULL) 3480 (void) spa_history_log(spa, history_str, LOG_CMD_POOL_CREATE); 3481 spa_history_log_version(spa, LOG_POOL_CREATE); 3482 3483 spa->spa_minref = refcount_count(&spa->spa_refcount); 3484 3485 mutex_exit(&spa_namespace_lock); 3486 3487 return (0); 3488} 3489 3490#if defined(sun) 3491#ifdef _KERNEL 3492/* 3493 * Get the root pool information from the root disk, then import the root pool 3494 * during the system boot up time. 3495 */ 3496extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 3497 3498static nvlist_t * 3499spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 3500{ 3501 nvlist_t *config; 3502 nvlist_t *nvtop, *nvroot; 3503 uint64_t pgid; 3504 3505 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 3506 return (NULL); 3507 3508 /* 3509 * Add this top-level vdev to the child array. 3510 */ 3511 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3512 &nvtop) == 0); 3513 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3514 &pgid) == 0); 3515 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 3516 3517 /* 3518 * Put this pool's top-level vdevs into a root vdev. 3519 */ 3520 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3521 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3522 VDEV_TYPE_ROOT) == 0); 3523 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3524 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3525 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3526 &nvtop, 1) == 0); 3527 3528 /* 3529 * Replace the existing vdev_tree with the new root vdev in 3530 * this pool's configuration (remove the old, add the new). 3531 */ 3532 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3533 nvlist_free(nvroot); 3534 return (config); 3535} 3536 3537/* 3538 * Walk the vdev tree and see if we can find a device with "better" 3539 * configuration. A configuration is "better" if the label on that 3540 * device has a more recent txg. 3541 */ 3542static void 3543spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 3544{ 3545 for (int c = 0; c < vd->vdev_children; c++) 3546 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 3547 3548 if (vd->vdev_ops->vdev_op_leaf) { 3549 nvlist_t *label; 3550 uint64_t label_txg; 3551 3552 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 3553 &label) != 0) 3554 return; 3555 3556 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 3557 &label_txg) == 0); 3558 3559 /* 3560 * Do we have a better boot device? 3561 */ 3562 if (label_txg > *txg) { 3563 *txg = label_txg; 3564 *avd = vd; 3565 } 3566 nvlist_free(label); 3567 } 3568} 3569 3570/* 3571 * Import a root pool. 3572 * 3573 * For x86. devpath_list will consist of devid and/or physpath name of 3574 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 3575 * The GRUB "findroot" command will return the vdev we should boot. 3576 * 3577 * For Sparc, devpath_list consists the physpath name of the booting device 3578 * no matter the rootpool is a single device pool or a mirrored pool. 3579 * e.g. 3580 * "/pci@1f,0/ide@d/disk@0,0:a" 3581 */ 3582int 3583spa_import_rootpool(char *devpath, char *devid) 3584{ 3585 spa_t *spa; 3586 vdev_t *rvd, *bvd, *avd = NULL; 3587 nvlist_t *config, *nvtop; 3588 uint64_t guid, txg; 3589 char *pname; 3590 int error; 3591 3592 /* 3593 * Read the label from the boot device and generate a configuration. 3594 */ 3595 config = spa_generate_rootconf(devpath, devid, &guid); 3596#if defined(_OBP) && defined(_KERNEL) 3597 if (config == NULL) { 3598 if (strstr(devpath, "/iscsi/ssd") != NULL) { 3599 /* iscsi boot */ 3600 get_iscsi_bootpath_phy(devpath); 3601 config = spa_generate_rootconf(devpath, devid, &guid); 3602 } 3603 } 3604#endif 3605 if (config == NULL) { 3606 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 3607 devpath); 3608 return (EIO); 3609 } 3610 3611 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 3612 &pname) == 0); 3613 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 3614 3615 mutex_enter(&spa_namespace_lock); 3616 if ((spa = spa_lookup(pname)) != NULL) { 3617 /* 3618 * Remove the existing root pool from the namespace so that we 3619 * can replace it with the correct config we just read in. 3620 */ 3621 spa_remove(spa); 3622 } 3623 3624 spa = spa_add(pname, config, NULL); 3625 spa->spa_is_root = B_TRUE; 3626 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 3627 3628 /* 3629 * Build up a vdev tree based on the boot device's label config. 3630 */ 3631 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3632 &nvtop) == 0); 3633 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3634 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 3635 VDEV_ALLOC_ROOTPOOL); 3636 spa_config_exit(spa, SCL_ALL, FTAG); 3637 if (error) { 3638 mutex_exit(&spa_namespace_lock); 3639 nvlist_free(config); 3640 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 3641 pname); 3642 return (error); 3643 } 3644 3645 /* 3646 * Get the boot vdev. 3647 */ 3648 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 3649 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 3650 (u_longlong_t)guid); 3651 error = ENOENT; 3652 goto out; 3653 } 3654 3655 /* 3656 * Determine if there is a better boot device. 3657 */ 3658 avd = bvd; 3659 spa_alt_rootvdev(rvd, &avd, &txg); 3660 if (avd != bvd) { 3661 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 3662 "try booting from '%s'", avd->vdev_path); 3663 error = EINVAL; 3664 goto out; 3665 } 3666 3667 /* 3668 * If the boot device is part of a spare vdev then ensure that 3669 * we're booting off the active spare. 3670 */ 3671 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 3672 !bvd->vdev_isspare) { 3673 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 3674 "try booting from '%s'", 3675 bvd->vdev_parent-> 3676 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 3677 error = EINVAL; 3678 goto out; 3679 } 3680 3681 error = 0; 3682 spa_history_log_version(spa, LOG_POOL_IMPORT); 3683out: 3684 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3685 vdev_free(rvd); 3686 spa_config_exit(spa, SCL_ALL, FTAG); 3687 mutex_exit(&spa_namespace_lock); 3688 3689 nvlist_free(config); 3690 return (error); 3691} 3692 3693#endif 3694#endif /* sun */ 3695 3696/* 3697 * Import a non-root pool into the system. 3698 */ 3699int 3700spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 3701{ 3702 spa_t *spa; 3703 char *altroot = NULL; 3704 spa_load_state_t state = SPA_LOAD_IMPORT; 3705 zpool_rewind_policy_t policy; 3706 uint64_t mode = spa_mode_global; 3707 uint64_t readonly = B_FALSE; 3708 int error; 3709 nvlist_t *nvroot; 3710 nvlist_t **spares, **l2cache; 3711 uint_t nspares, nl2cache; 3712 3713 /* 3714 * If a pool with this name exists, return failure. 3715 */ 3716 mutex_enter(&spa_namespace_lock); 3717 if (spa_lookup(pool) != NULL) { 3718 mutex_exit(&spa_namespace_lock); 3719 return (EEXIST); 3720 } 3721 3722 /* 3723 * Create and initialize the spa structure. 3724 */ 3725 (void) nvlist_lookup_string(props, 3726 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3727 (void) nvlist_lookup_uint64(props, 3728 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 3729 if (readonly) 3730 mode = FREAD; 3731 spa = spa_add(pool, config, altroot); 3732 spa->spa_import_flags = flags; 3733 3734 /* 3735 * Verbatim import - Take a pool and insert it into the namespace 3736 * as if it had been loaded at boot. 3737 */ 3738 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 3739 if (props != NULL) 3740 spa_configfile_set(spa, props, B_FALSE); 3741 3742 spa_config_sync(spa, B_FALSE, B_TRUE); 3743 3744 mutex_exit(&spa_namespace_lock); 3745 spa_history_log_version(spa, LOG_POOL_IMPORT); 3746 3747 return (0); 3748 } 3749 3750 spa_activate(spa, mode); 3751 3752 /* 3753 * Don't start async tasks until we know everything is healthy. 3754 */ 3755 spa_async_suspend(spa); 3756 3757 zpool_get_rewind_policy(config, &policy); 3758 if (policy.zrp_request & ZPOOL_DO_REWIND) 3759 state = SPA_LOAD_RECOVER; 3760 3761 /* 3762 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig 3763 * because the user-supplied config is actually the one to trust when 3764 * doing an import. 3765 */ 3766 if (state != SPA_LOAD_RECOVER) 3767 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 3768 3769 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, 3770 policy.zrp_request); 3771 3772 /* 3773 * Propagate anything learned while loading the pool and pass it 3774 * back to caller (i.e. rewind info, missing devices, etc). 3775 */ 3776 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 3777 spa->spa_load_info) == 0); 3778 3779 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3780 /* 3781 * Toss any existing sparelist, as it doesn't have any validity 3782 * anymore, and conflicts with spa_has_spare(). 3783 */ 3784 if (spa->spa_spares.sav_config) { 3785 nvlist_free(spa->spa_spares.sav_config); 3786 spa->spa_spares.sav_config = NULL; 3787 spa_load_spares(spa); 3788 } 3789 if (spa->spa_l2cache.sav_config) { 3790 nvlist_free(spa->spa_l2cache.sav_config); 3791 spa->spa_l2cache.sav_config = NULL; 3792 spa_load_l2cache(spa); 3793 } 3794 3795 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3796 &nvroot) == 0); 3797 if (error == 0) 3798 error = spa_validate_aux(spa, nvroot, -1ULL, 3799 VDEV_ALLOC_SPARE); 3800 if (error == 0) 3801 error = spa_validate_aux(spa, nvroot, -1ULL, 3802 VDEV_ALLOC_L2CACHE); 3803 spa_config_exit(spa, SCL_ALL, FTAG); 3804 3805 if (props != NULL) 3806 spa_configfile_set(spa, props, B_FALSE); 3807 3808 if (error != 0 || (props && spa_writeable(spa) && 3809 (error = spa_prop_set(spa, props)))) { 3810 spa_unload(spa); 3811 spa_deactivate(spa); 3812 spa_remove(spa); 3813 mutex_exit(&spa_namespace_lock); 3814 return (error); 3815 } 3816 3817 spa_async_resume(spa); 3818 3819 /* 3820 * Override any spares and level 2 cache devices as specified by 3821 * the user, as these may have correct device names/devids, etc. 3822 */ 3823 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3824 &spares, &nspares) == 0) { 3825 if (spa->spa_spares.sav_config) 3826 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 3827 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 3828 else 3829 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 3830 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3831 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3832 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3833 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3834 spa_load_spares(spa); 3835 spa_config_exit(spa, SCL_ALL, FTAG); 3836 spa->spa_spares.sav_sync = B_TRUE; 3837 } 3838 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3839 &l2cache, &nl2cache) == 0) { 3840 if (spa->spa_l2cache.sav_config) 3841 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 3842 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 3843 else 3844 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3845 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3846 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3847 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3848 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3849 spa_load_l2cache(spa); 3850 spa_config_exit(spa, SCL_ALL, FTAG); 3851 spa->spa_l2cache.sav_sync = B_TRUE; 3852 } 3853 3854 /* 3855 * Check for any removed devices. 3856 */ 3857 if (spa->spa_autoreplace) { 3858 spa_aux_check_removed(&spa->spa_spares); 3859 spa_aux_check_removed(&spa->spa_l2cache); 3860 } 3861 3862 if (spa_writeable(spa)) { 3863 /* 3864 * Update the config cache to include the newly-imported pool. 3865 */ 3866 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 3867 } 3868 3869 /* 3870 * It's possible that the pool was expanded while it was exported. 3871 * We kick off an async task to handle this for us. 3872 */ 3873 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 3874 3875 mutex_exit(&spa_namespace_lock); 3876 spa_history_log_version(spa, LOG_POOL_IMPORT); 3877 3878#ifdef __FreeBSD__ 3879#ifdef _KERNEL 3880 zvol_create_minors(pool); 3881#endif 3882#endif 3883 return (0); 3884} 3885 3886nvlist_t * 3887spa_tryimport(nvlist_t *tryconfig) 3888{ 3889 nvlist_t *config = NULL; 3890 char *poolname; 3891 spa_t *spa; 3892 uint64_t state; 3893 int error; 3894 3895 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 3896 return (NULL); 3897 3898 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 3899 return (NULL); 3900 3901 /* 3902 * Create and initialize the spa structure. 3903 */ 3904 mutex_enter(&spa_namespace_lock); 3905 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 3906 spa_activate(spa, FREAD); 3907 3908 /* 3909 * Pass off the heavy lifting to spa_load(). 3910 * Pass TRUE for mosconfig because the user-supplied config 3911 * is actually the one to trust when doing an import. 3912 */ 3913 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); 3914 3915 /* 3916 * If 'tryconfig' was at least parsable, return the current config. 3917 */ 3918 if (spa->spa_root_vdev != NULL) { 3919 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 3920 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 3921 poolname) == 0); 3922 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 3923 state) == 0); 3924 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 3925 spa->spa_uberblock.ub_timestamp) == 0); 3926 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 3927 spa->spa_load_info) == 0); 3928 3929 /* 3930 * If the bootfs property exists on this pool then we 3931 * copy it out so that external consumers can tell which 3932 * pools are bootable. 3933 */ 3934 if ((!error || error == EEXIST) && spa->spa_bootfs) { 3935 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3936 3937 /* 3938 * We have to play games with the name since the 3939 * pool was opened as TRYIMPORT_NAME. 3940 */ 3941 if (dsl_dsobj_to_dsname(spa_name(spa), 3942 spa->spa_bootfs, tmpname) == 0) { 3943 char *cp; 3944 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3945 3946 cp = strchr(tmpname, '/'); 3947 if (cp == NULL) { 3948 (void) strlcpy(dsname, tmpname, 3949 MAXPATHLEN); 3950 } else { 3951 (void) snprintf(dsname, MAXPATHLEN, 3952 "%s/%s", poolname, ++cp); 3953 } 3954 VERIFY(nvlist_add_string(config, 3955 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 3956 kmem_free(dsname, MAXPATHLEN); 3957 } 3958 kmem_free(tmpname, MAXPATHLEN); 3959 } 3960 3961 /* 3962 * Add the list of hot spares and level 2 cache devices. 3963 */ 3964 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3965 spa_add_spares(spa, config); 3966 spa_add_l2cache(spa, config); 3967 spa_config_exit(spa, SCL_CONFIG, FTAG); 3968 } 3969 3970 spa_unload(spa); 3971 spa_deactivate(spa); 3972 spa_remove(spa); 3973 mutex_exit(&spa_namespace_lock); 3974 3975 return (config); 3976} 3977 3978/* 3979 * Pool export/destroy 3980 * 3981 * The act of destroying or exporting a pool is very simple. We make sure there 3982 * is no more pending I/O and any references to the pool are gone. Then, we 3983 * update the pool state and sync all the labels to disk, removing the 3984 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 3985 * we don't sync the labels or remove the configuration cache. 3986 */ 3987static int 3988spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 3989 boolean_t force, boolean_t hardforce) 3990{ 3991 spa_t *spa; 3992 3993 if (oldconfig) 3994 *oldconfig = NULL; 3995 3996 if (!(spa_mode_global & FWRITE)) 3997 return (EROFS); 3998 3999 mutex_enter(&spa_namespace_lock); 4000 if ((spa = spa_lookup(pool)) == NULL) { 4001 mutex_exit(&spa_namespace_lock); 4002 return (ENOENT); 4003 } 4004 4005 /* 4006 * Put a hold on the pool, drop the namespace lock, stop async tasks, 4007 * reacquire the namespace lock, and see if we can export. 4008 */ 4009 spa_open_ref(spa, FTAG); 4010 mutex_exit(&spa_namespace_lock); 4011 spa_async_suspend(spa); 4012 mutex_enter(&spa_namespace_lock); 4013 spa_close(spa, FTAG); 4014 4015 /* 4016 * The pool will be in core if it's openable, 4017 * in which case we can modify its state. 4018 */ 4019 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 4020 /* 4021 * Objsets may be open only because they're dirty, so we 4022 * have to force it to sync before checking spa_refcnt. 4023 */ 4024 txg_wait_synced(spa->spa_dsl_pool, 0); 4025 4026 /* 4027 * A pool cannot be exported or destroyed if there are active 4028 * references. If we are resetting a pool, allow references by 4029 * fault injection handlers. 4030 */ 4031 if (!spa_refcount_zero(spa) || 4032 (spa->spa_inject_ref != 0 && 4033 new_state != POOL_STATE_UNINITIALIZED)) { 4034 spa_async_resume(spa); 4035 mutex_exit(&spa_namespace_lock); 4036 return (EBUSY); 4037 } 4038 4039 /* 4040 * A pool cannot be exported if it has an active shared spare. 4041 * This is to prevent other pools stealing the active spare 4042 * from an exported pool. At user's own will, such pool can 4043 * be forcedly exported. 4044 */ 4045 if (!force && new_state == POOL_STATE_EXPORTED && 4046 spa_has_active_shared_spare(spa)) { 4047 spa_async_resume(spa); 4048 mutex_exit(&spa_namespace_lock); 4049 return (EXDEV); 4050 } 4051 4052 /* 4053 * We want this to be reflected on every label, 4054 * so mark them all dirty. spa_unload() will do the 4055 * final sync that pushes these changes out. 4056 */ 4057 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 4058 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4059 spa->spa_state = new_state; 4060 spa->spa_final_txg = spa_last_synced_txg(spa) + 4061 TXG_DEFER_SIZE + 1; 4062 vdev_config_dirty(spa->spa_root_vdev); 4063 spa_config_exit(spa, SCL_ALL, FTAG); 4064 } 4065 } 4066 4067 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY); 4068 4069 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 4070 spa_unload(spa); 4071 spa_deactivate(spa); 4072 } 4073 4074 if (oldconfig && spa->spa_config) 4075 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 4076 4077 if (new_state != POOL_STATE_UNINITIALIZED) { 4078 if (!hardforce) 4079 spa_config_sync(spa, B_TRUE, B_TRUE); 4080 spa_remove(spa); 4081 } 4082 mutex_exit(&spa_namespace_lock); 4083 4084 return (0); 4085} 4086 4087/* 4088 * Destroy a storage pool. 4089 */ 4090int 4091spa_destroy(char *pool) 4092{ 4093 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 4094 B_FALSE, B_FALSE)); 4095} 4096 4097/* 4098 * Export a storage pool. 4099 */ 4100int 4101spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 4102 boolean_t hardforce) 4103{ 4104 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 4105 force, hardforce)); 4106} 4107 4108/* 4109 * Similar to spa_export(), this unloads the spa_t without actually removing it 4110 * from the namespace in any way. 4111 */ 4112int 4113spa_reset(char *pool) 4114{ 4115 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 4116 B_FALSE, B_FALSE)); 4117} 4118 4119/* 4120 * ========================================================================== 4121 * Device manipulation 4122 * ========================================================================== 4123 */ 4124 4125/* 4126 * Add a device to a storage pool. 4127 */ 4128int 4129spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 4130{ 4131 uint64_t txg, id; 4132 int error; 4133 vdev_t *rvd = spa->spa_root_vdev; 4134 vdev_t *vd, *tvd; 4135 nvlist_t **spares, **l2cache; 4136 uint_t nspares, nl2cache; 4137 4138 ASSERT(spa_writeable(spa)); 4139 4140 txg = spa_vdev_enter(spa); 4141 4142 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 4143 VDEV_ALLOC_ADD)) != 0) 4144 return (spa_vdev_exit(spa, NULL, txg, error)); 4145 4146 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 4147 4148 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 4149 &nspares) != 0) 4150 nspares = 0; 4151 4152 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 4153 &nl2cache) != 0) 4154 nl2cache = 0; 4155 4156 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 4157 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 4158 4159 if (vd->vdev_children != 0 && 4160 (error = vdev_create(vd, txg, B_FALSE)) != 0) 4161 return (spa_vdev_exit(spa, vd, txg, error)); 4162 4163 /* 4164 * We must validate the spares and l2cache devices after checking the 4165 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 4166 */ 4167 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 4168 return (spa_vdev_exit(spa, vd, txg, error)); 4169 4170 /* 4171 * Transfer each new top-level vdev from vd to rvd. 4172 */ 4173 for (int c = 0; c < vd->vdev_children; c++) { 4174 4175 /* 4176 * Set the vdev id to the first hole, if one exists. 4177 */ 4178 for (id = 0; id < rvd->vdev_children; id++) { 4179 if (rvd->vdev_child[id]->vdev_ishole) { 4180 vdev_free(rvd->vdev_child[id]); 4181 break; 4182 } 4183 } 4184 tvd = vd->vdev_child[c]; 4185 vdev_remove_child(vd, tvd); 4186 tvd->vdev_id = id; 4187 vdev_add_child(rvd, tvd); 4188 vdev_config_dirty(tvd); 4189 } 4190 4191 if (nspares != 0) { 4192 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 4193 ZPOOL_CONFIG_SPARES); 4194 spa_load_spares(spa); 4195 spa->spa_spares.sav_sync = B_TRUE; 4196 } 4197 4198 if (nl2cache != 0) { 4199 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 4200 ZPOOL_CONFIG_L2CACHE); 4201 spa_load_l2cache(spa); 4202 spa->spa_l2cache.sav_sync = B_TRUE; 4203 } 4204 4205 /* 4206 * We have to be careful when adding new vdevs to an existing pool. 4207 * If other threads start allocating from these vdevs before we 4208 * sync the config cache, and we lose power, then upon reboot we may 4209 * fail to open the pool because there are DVAs that the config cache 4210 * can't translate. Therefore, we first add the vdevs without 4211 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 4212 * and then let spa_config_update() initialize the new metaslabs. 4213 * 4214 * spa_load() checks for added-but-not-initialized vdevs, so that 4215 * if we lose power at any point in this sequence, the remaining 4216 * steps will be completed the next time we load the pool. 4217 */ 4218 (void) spa_vdev_exit(spa, vd, txg, 0); 4219 4220 mutex_enter(&spa_namespace_lock); 4221 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4222 mutex_exit(&spa_namespace_lock); 4223 4224 return (0); 4225} 4226 4227/* 4228 * Attach a device to a mirror. The arguments are the path to any device 4229 * in the mirror, and the nvroot for the new device. If the path specifies 4230 * a device that is not mirrored, we automatically insert the mirror vdev. 4231 * 4232 * If 'replacing' is specified, the new device is intended to replace the 4233 * existing device; in this case the two devices are made into their own 4234 * mirror using the 'replacing' vdev, which is functionally identical to 4235 * the mirror vdev (it actually reuses all the same ops) but has a few 4236 * extra rules: you can't attach to it after it's been created, and upon 4237 * completion of resilvering, the first disk (the one being replaced) 4238 * is automatically detached. 4239 */ 4240int 4241spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 4242{ 4243 uint64_t txg, dtl_max_txg; 4244 vdev_t *rvd = spa->spa_root_vdev; 4245 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 4246 vdev_ops_t *pvops; 4247 char *oldvdpath, *newvdpath; 4248 int newvd_isspare; 4249 int error; 4250 4251 ASSERT(spa_writeable(spa)); 4252 4253 txg = spa_vdev_enter(spa); 4254 4255 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 4256 4257 if (oldvd == NULL) 4258 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4259 4260 if (!oldvd->vdev_ops->vdev_op_leaf) 4261 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4262 4263 pvd = oldvd->vdev_parent; 4264 4265 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 4266 VDEV_ALLOC_ATTACH)) != 0) 4267 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4268 4269 if (newrootvd->vdev_children != 1) 4270 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4271 4272 newvd = newrootvd->vdev_child[0]; 4273 4274 if (!newvd->vdev_ops->vdev_op_leaf) 4275 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4276 4277 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 4278 return (spa_vdev_exit(spa, newrootvd, txg, error)); 4279 4280 /* 4281 * Spares can't replace logs 4282 */ 4283 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 4284 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4285 4286 if (!replacing) { 4287 /* 4288 * For attach, the only allowable parent is a mirror or the root 4289 * vdev. 4290 */ 4291 if (pvd->vdev_ops != &vdev_mirror_ops && 4292 pvd->vdev_ops != &vdev_root_ops) 4293 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4294 4295 pvops = &vdev_mirror_ops; 4296 } else { 4297 /* 4298 * Active hot spares can only be replaced by inactive hot 4299 * spares. 4300 */ 4301 if (pvd->vdev_ops == &vdev_spare_ops && 4302 oldvd->vdev_isspare && 4303 !spa_has_spare(spa, newvd->vdev_guid)) 4304 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4305 4306 /* 4307 * If the source is a hot spare, and the parent isn't already a 4308 * spare, then we want to create a new hot spare. Otherwise, we 4309 * want to create a replacing vdev. The user is not allowed to 4310 * attach to a spared vdev child unless the 'isspare' state is 4311 * the same (spare replaces spare, non-spare replaces 4312 * non-spare). 4313 */ 4314 if (pvd->vdev_ops == &vdev_replacing_ops && 4315 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 4316 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4317 } else if (pvd->vdev_ops == &vdev_spare_ops && 4318 newvd->vdev_isspare != oldvd->vdev_isspare) { 4319 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4320 } 4321 4322 if (newvd->vdev_isspare) 4323 pvops = &vdev_spare_ops; 4324 else 4325 pvops = &vdev_replacing_ops; 4326 } 4327 4328 /* 4329 * Make sure the new device is big enough. 4330 */ 4331 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 4332 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 4333 4334 /* 4335 * The new device cannot have a higher alignment requirement 4336 * than the top-level vdev. 4337 */ 4338 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 4339 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 4340 4341 /* 4342 * If this is an in-place replacement, update oldvd's path and devid 4343 * to make it distinguishable from newvd, and unopenable from now on. 4344 */ 4345 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 4346 spa_strfree(oldvd->vdev_path); 4347 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 4348 KM_SLEEP); 4349 (void) sprintf(oldvd->vdev_path, "%s/%s", 4350 newvd->vdev_path, "old"); 4351 if (oldvd->vdev_devid != NULL) { 4352 spa_strfree(oldvd->vdev_devid); 4353 oldvd->vdev_devid = NULL; 4354 } 4355 } 4356 4357 /* mark the device being resilvered */ 4358 newvd->vdev_resilvering = B_TRUE; 4359 4360 /* 4361 * If the parent is not a mirror, or if we're replacing, insert the new 4362 * mirror/replacing/spare vdev above oldvd. 4363 */ 4364 if (pvd->vdev_ops != pvops) 4365 pvd = vdev_add_parent(oldvd, pvops); 4366 4367 ASSERT(pvd->vdev_top->vdev_parent == rvd); 4368 ASSERT(pvd->vdev_ops == pvops); 4369 ASSERT(oldvd->vdev_parent == pvd); 4370 4371 /* 4372 * Extract the new device from its root and add it to pvd. 4373 */ 4374 vdev_remove_child(newrootvd, newvd); 4375 newvd->vdev_id = pvd->vdev_children; 4376 newvd->vdev_crtxg = oldvd->vdev_crtxg; 4377 vdev_add_child(pvd, newvd); 4378 4379 tvd = newvd->vdev_top; 4380 ASSERT(pvd->vdev_top == tvd); 4381 ASSERT(tvd->vdev_parent == rvd); 4382 4383 vdev_config_dirty(tvd); 4384 4385 /* 4386 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 4387 * for any dmu_sync-ed blocks. It will propagate upward when 4388 * spa_vdev_exit() calls vdev_dtl_reassess(). 4389 */ 4390 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 4391 4392 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 4393 dtl_max_txg - TXG_INITIAL); 4394 4395 if (newvd->vdev_isspare) { 4396 spa_spare_activate(newvd); 4397 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE); 4398 } 4399 4400 oldvdpath = spa_strdup(oldvd->vdev_path); 4401 newvdpath = spa_strdup(newvd->vdev_path); 4402 newvd_isspare = newvd->vdev_isspare; 4403 4404 /* 4405 * Mark newvd's DTL dirty in this txg. 4406 */ 4407 vdev_dirty(tvd, VDD_DTL, newvd, txg); 4408 4409 /* 4410 * Restart the resilver 4411 */ 4412 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); 4413 4414 /* 4415 * Commit the config 4416 */ 4417 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 4418 4419 spa_history_log_internal(LOG_POOL_VDEV_ATTACH, spa, NULL, 4420 "%s vdev=%s %s vdev=%s", 4421 replacing && newvd_isspare ? "spare in" : 4422 replacing ? "replace" : "attach", newvdpath, 4423 replacing ? "for" : "to", oldvdpath); 4424 4425 spa_strfree(oldvdpath); 4426 spa_strfree(newvdpath); 4427 4428 if (spa->spa_bootfs) 4429 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH); 4430 4431 return (0); 4432} 4433 4434/* 4435 * Detach a device from a mirror or replacing vdev. 4436 * If 'replace_done' is specified, only detach if the parent 4437 * is a replacing vdev. 4438 */ 4439int 4440spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 4441{ 4442 uint64_t txg; 4443 int error; 4444 vdev_t *rvd = spa->spa_root_vdev; 4445 vdev_t *vd, *pvd, *cvd, *tvd; 4446 boolean_t unspare = B_FALSE; 4447 uint64_t unspare_guid; 4448 char *vdpath; 4449 4450 ASSERT(spa_writeable(spa)); 4451 4452 txg = spa_vdev_enter(spa); 4453 4454 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 4455 4456 if (vd == NULL) 4457 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4458 4459 if (!vd->vdev_ops->vdev_op_leaf) 4460 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4461 4462 pvd = vd->vdev_parent; 4463 4464 /* 4465 * If the parent/child relationship is not as expected, don't do it. 4466 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 4467 * vdev that's replacing B with C. The user's intent in replacing 4468 * is to go from M(A,B) to M(A,C). If the user decides to cancel 4469 * the replace by detaching C, the expected behavior is to end up 4470 * M(A,B). But suppose that right after deciding to detach C, 4471 * the replacement of B completes. We would have M(A,C), and then 4472 * ask to detach C, which would leave us with just A -- not what 4473 * the user wanted. To prevent this, we make sure that the 4474 * parent/child relationship hasn't changed -- in this example, 4475 * that C's parent is still the replacing vdev R. 4476 */ 4477 if (pvd->vdev_guid != pguid && pguid != 0) 4478 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4479 4480 /* 4481 * Only 'replacing' or 'spare' vdevs can be replaced. 4482 */ 4483 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 4484 pvd->vdev_ops != &vdev_spare_ops) 4485 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4486 4487 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 4488 spa_version(spa) >= SPA_VERSION_SPARES); 4489 4490 /* 4491 * Only mirror, replacing, and spare vdevs support detach. 4492 */ 4493 if (pvd->vdev_ops != &vdev_replacing_ops && 4494 pvd->vdev_ops != &vdev_mirror_ops && 4495 pvd->vdev_ops != &vdev_spare_ops) 4496 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4497 4498 /* 4499 * If this device has the only valid copy of some data, 4500 * we cannot safely detach it. 4501 */ 4502 if (vdev_dtl_required(vd)) 4503 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 4504 4505 ASSERT(pvd->vdev_children >= 2); 4506 4507 /* 4508 * If we are detaching the second disk from a replacing vdev, then 4509 * check to see if we changed the original vdev's path to have "/old" 4510 * at the end in spa_vdev_attach(). If so, undo that change now. 4511 */ 4512 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 4513 vd->vdev_path != NULL) { 4514 size_t len = strlen(vd->vdev_path); 4515 4516 for (int c = 0; c < pvd->vdev_children; c++) { 4517 cvd = pvd->vdev_child[c]; 4518 4519 if (cvd == vd || cvd->vdev_path == NULL) 4520 continue; 4521 4522 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 4523 strcmp(cvd->vdev_path + len, "/old") == 0) { 4524 spa_strfree(cvd->vdev_path); 4525 cvd->vdev_path = spa_strdup(vd->vdev_path); 4526 break; 4527 } 4528 } 4529 } 4530 4531 /* 4532 * If we are detaching the original disk from a spare, then it implies 4533 * that the spare should become a real disk, and be removed from the 4534 * active spare list for the pool. 4535 */ 4536 if (pvd->vdev_ops == &vdev_spare_ops && 4537 vd->vdev_id == 0 && 4538 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 4539 unspare = B_TRUE; 4540 4541 /* 4542 * Erase the disk labels so the disk can be used for other things. 4543 * This must be done after all other error cases are handled, 4544 * but before we disembowel vd (so we can still do I/O to it). 4545 * But if we can't do it, don't treat the error as fatal -- 4546 * it may be that the unwritability of the disk is the reason 4547 * it's being detached! 4548 */ 4549 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 4550 4551 /* 4552 * Remove vd from its parent and compact the parent's children. 4553 */ 4554 vdev_remove_child(pvd, vd); 4555 vdev_compact_children(pvd); 4556 4557 /* 4558 * Remember one of the remaining children so we can get tvd below. 4559 */ 4560 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 4561 4562 /* 4563 * If we need to remove the remaining child from the list of hot spares, 4564 * do it now, marking the vdev as no longer a spare in the process. 4565 * We must do this before vdev_remove_parent(), because that can 4566 * change the GUID if it creates a new toplevel GUID. For a similar 4567 * reason, we must remove the spare now, in the same txg as the detach; 4568 * otherwise someone could attach a new sibling, change the GUID, and 4569 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 4570 */ 4571 if (unspare) { 4572 ASSERT(cvd->vdev_isspare); 4573 spa_spare_remove(cvd); 4574 unspare_guid = cvd->vdev_guid; 4575 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 4576 cvd->vdev_unspare = B_TRUE; 4577 } 4578 4579 /* 4580 * If the parent mirror/replacing vdev only has one child, 4581 * the parent is no longer needed. Remove it from the tree. 4582 */ 4583 if (pvd->vdev_children == 1) { 4584 if (pvd->vdev_ops == &vdev_spare_ops) 4585 cvd->vdev_unspare = B_FALSE; 4586 vdev_remove_parent(cvd); 4587 cvd->vdev_resilvering = B_FALSE; 4588 } 4589 4590 4591 /* 4592 * We don't set tvd until now because the parent we just removed 4593 * may have been the previous top-level vdev. 4594 */ 4595 tvd = cvd->vdev_top; 4596 ASSERT(tvd->vdev_parent == rvd); 4597 4598 /* 4599 * Reevaluate the parent vdev state. 4600 */ 4601 vdev_propagate_state(cvd); 4602 4603 /* 4604 * If the 'autoexpand' property is set on the pool then automatically 4605 * try to expand the size of the pool. For example if the device we 4606 * just detached was smaller than the others, it may be possible to 4607 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 4608 * first so that we can obtain the updated sizes of the leaf vdevs. 4609 */ 4610 if (spa->spa_autoexpand) { 4611 vdev_reopen(tvd); 4612 vdev_expand(tvd, txg); 4613 } 4614 4615 vdev_config_dirty(tvd); 4616 4617 /* 4618 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 4619 * vd->vdev_detached is set and free vd's DTL object in syncing context. 4620 * But first make sure we're not on any *other* txg's DTL list, to 4621 * prevent vd from being accessed after it's freed. 4622 */ 4623 vdpath = spa_strdup(vd->vdev_path); 4624 for (int t = 0; t < TXG_SIZE; t++) 4625 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 4626 vd->vdev_detached = B_TRUE; 4627 vdev_dirty(tvd, VDD_DTL, vd, txg); 4628 4629 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE); 4630 4631 /* hang on to the spa before we release the lock */ 4632 spa_open_ref(spa, FTAG); 4633 4634 error = spa_vdev_exit(spa, vd, txg, 0); 4635 4636 spa_history_log_internal(LOG_POOL_VDEV_DETACH, spa, NULL, 4637 "vdev=%s", vdpath); 4638 spa_strfree(vdpath); 4639 4640 /* 4641 * If this was the removal of the original device in a hot spare vdev, 4642 * then we want to go through and remove the device from the hot spare 4643 * list of every other pool. 4644 */ 4645 if (unspare) { 4646 spa_t *altspa = NULL; 4647 4648 mutex_enter(&spa_namespace_lock); 4649 while ((altspa = spa_next(altspa)) != NULL) { 4650 if (altspa->spa_state != POOL_STATE_ACTIVE || 4651 altspa == spa) 4652 continue; 4653 4654 spa_open_ref(altspa, FTAG); 4655 mutex_exit(&spa_namespace_lock); 4656 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 4657 mutex_enter(&spa_namespace_lock); 4658 spa_close(altspa, FTAG); 4659 } 4660 mutex_exit(&spa_namespace_lock); 4661 4662 /* search the rest of the vdevs for spares to remove */ 4663 spa_vdev_resilver_done(spa); 4664 } 4665 4666 /* all done with the spa; OK to release */ 4667 mutex_enter(&spa_namespace_lock); 4668 spa_close(spa, FTAG); 4669 mutex_exit(&spa_namespace_lock); 4670 4671 return (error); 4672} 4673 4674/* 4675 * Split a set of devices from their mirrors, and create a new pool from them. 4676 */ 4677int 4678spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 4679 nvlist_t *props, boolean_t exp) 4680{ 4681 int error = 0; 4682 uint64_t txg, *glist; 4683 spa_t *newspa; 4684 uint_t c, children, lastlog; 4685 nvlist_t **child, *nvl, *tmp; 4686 dmu_tx_t *tx; 4687 char *altroot = NULL; 4688 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 4689 boolean_t activate_slog; 4690 4691 ASSERT(spa_writeable(spa)); 4692 4693 txg = spa_vdev_enter(spa); 4694 4695 /* clear the log and flush everything up to now */ 4696 activate_slog = spa_passivate_log(spa); 4697 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 4698 error = spa_offline_log(spa); 4699 txg = spa_vdev_config_enter(spa); 4700 4701 if (activate_slog) 4702 spa_activate_log(spa); 4703 4704 if (error != 0) 4705 return (spa_vdev_exit(spa, NULL, txg, error)); 4706 4707 /* check new spa name before going any further */ 4708 if (spa_lookup(newname) != NULL) 4709 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 4710 4711 /* 4712 * scan through all the children to ensure they're all mirrors 4713 */ 4714 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 4715 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 4716 &children) != 0) 4717 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4718 4719 /* first, check to ensure we've got the right child count */ 4720 rvd = spa->spa_root_vdev; 4721 lastlog = 0; 4722 for (c = 0; c < rvd->vdev_children; c++) { 4723 vdev_t *vd = rvd->vdev_child[c]; 4724 4725 /* don't count the holes & logs as children */ 4726 if (vd->vdev_islog || vd->vdev_ishole) { 4727 if (lastlog == 0) 4728 lastlog = c; 4729 continue; 4730 } 4731 4732 lastlog = 0; 4733 } 4734 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 4735 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4736 4737 /* next, ensure no spare or cache devices are part of the split */ 4738 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 4739 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 4740 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4741 4742 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 4743 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 4744 4745 /* then, loop over each vdev and validate it */ 4746 for (c = 0; c < children; c++) { 4747 uint64_t is_hole = 0; 4748 4749 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 4750 &is_hole); 4751 4752 if (is_hole != 0) { 4753 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 4754 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 4755 continue; 4756 } else { 4757 error = EINVAL; 4758 break; 4759 } 4760 } 4761 4762 /* which disk is going to be split? */ 4763 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 4764 &glist[c]) != 0) { 4765 error = EINVAL; 4766 break; 4767 } 4768 4769 /* look it up in the spa */ 4770 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 4771 if (vml[c] == NULL) { 4772 error = ENODEV; 4773 break; 4774 } 4775 4776 /* make sure there's nothing stopping the split */ 4777 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 4778 vml[c]->vdev_islog || 4779 vml[c]->vdev_ishole || 4780 vml[c]->vdev_isspare || 4781 vml[c]->vdev_isl2cache || 4782 !vdev_writeable(vml[c]) || 4783 vml[c]->vdev_children != 0 || 4784 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 4785 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 4786 error = EINVAL; 4787 break; 4788 } 4789 4790 if (vdev_dtl_required(vml[c])) { 4791 error = EBUSY; 4792 break; 4793 } 4794 4795 /* we need certain info from the top level */ 4796 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 4797 vml[c]->vdev_top->vdev_ms_array) == 0); 4798 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 4799 vml[c]->vdev_top->vdev_ms_shift) == 0); 4800 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 4801 vml[c]->vdev_top->vdev_asize) == 0); 4802 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 4803 vml[c]->vdev_top->vdev_ashift) == 0); 4804 } 4805 4806 if (error != 0) { 4807 kmem_free(vml, children * sizeof (vdev_t *)); 4808 kmem_free(glist, children * sizeof (uint64_t)); 4809 return (spa_vdev_exit(spa, NULL, txg, error)); 4810 } 4811 4812 /* stop writers from using the disks */ 4813 for (c = 0; c < children; c++) { 4814 if (vml[c] != NULL) 4815 vml[c]->vdev_offline = B_TRUE; 4816 } 4817 vdev_reopen(spa->spa_root_vdev); 4818 4819 /* 4820 * Temporarily record the splitting vdevs in the spa config. This 4821 * will disappear once the config is regenerated. 4822 */ 4823 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4824 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 4825 glist, children) == 0); 4826 kmem_free(glist, children * sizeof (uint64_t)); 4827 4828 mutex_enter(&spa->spa_props_lock); 4829 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 4830 nvl) == 0); 4831 mutex_exit(&spa->spa_props_lock); 4832 spa->spa_config_splitting = nvl; 4833 vdev_config_dirty(spa->spa_root_vdev); 4834 4835 /* configure and create the new pool */ 4836 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 4837 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 4838 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 4839 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 4840 spa_version(spa)) == 0); 4841 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 4842 spa->spa_config_txg) == 0); 4843 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 4844 spa_generate_guid(NULL)) == 0); 4845 (void) nvlist_lookup_string(props, 4846 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 4847 4848 /* add the new pool to the namespace */ 4849 newspa = spa_add(newname, config, altroot); 4850 newspa->spa_config_txg = spa->spa_config_txg; 4851 spa_set_log_state(newspa, SPA_LOG_CLEAR); 4852 4853 /* release the spa config lock, retaining the namespace lock */ 4854 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 4855 4856 if (zio_injection_enabled) 4857 zio_handle_panic_injection(spa, FTAG, 1); 4858 4859 spa_activate(newspa, spa_mode_global); 4860 spa_async_suspend(newspa); 4861 4862#ifndef sun 4863 /* mark that we are creating new spa by splitting */ 4864 newspa->spa_splitting_newspa = B_TRUE; 4865#endif 4866 /* create the new pool from the disks of the original pool */ 4867 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); 4868#ifndef sun 4869 newspa->spa_splitting_newspa = B_FALSE; 4870#endif 4871 if (error) 4872 goto out; 4873 4874 /* if that worked, generate a real config for the new pool */ 4875 if (newspa->spa_root_vdev != NULL) { 4876 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 4877 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4878 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 4879 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 4880 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 4881 B_TRUE)); 4882 } 4883 4884 /* set the props */ 4885 if (props != NULL) { 4886 spa_configfile_set(newspa, props, B_FALSE); 4887 error = spa_prop_set(newspa, props); 4888 if (error) 4889 goto out; 4890 } 4891 4892 /* flush everything */ 4893 txg = spa_vdev_config_enter(newspa); 4894 vdev_config_dirty(newspa->spa_root_vdev); 4895 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 4896 4897 if (zio_injection_enabled) 4898 zio_handle_panic_injection(spa, FTAG, 2); 4899 4900 spa_async_resume(newspa); 4901 4902 /* finally, update the original pool's config */ 4903 txg = spa_vdev_config_enter(spa); 4904 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 4905 error = dmu_tx_assign(tx, TXG_WAIT); 4906 if (error != 0) 4907 dmu_tx_abort(tx); 4908 for (c = 0; c < children; c++) { 4909 if (vml[c] != NULL) { 4910 vdev_split(vml[c]); 4911 if (error == 0) 4912 spa_history_log_internal(LOG_POOL_VDEV_DETACH, 4913 spa, tx, "vdev=%s", 4914 vml[c]->vdev_path); 4915 vdev_free(vml[c]); 4916 } 4917 } 4918 vdev_config_dirty(spa->spa_root_vdev); 4919 spa->spa_config_splitting = NULL; 4920 nvlist_free(nvl); 4921 if (error == 0) 4922 dmu_tx_commit(tx); 4923 (void) spa_vdev_exit(spa, NULL, txg, 0); 4924 4925 if (zio_injection_enabled) 4926 zio_handle_panic_injection(spa, FTAG, 3); 4927 4928 /* split is complete; log a history record */ 4929 spa_history_log_internal(LOG_POOL_SPLIT, newspa, NULL, 4930 "split new pool %s from pool %s", newname, spa_name(spa)); 4931 4932 kmem_free(vml, children * sizeof (vdev_t *)); 4933 4934 /* if we're not going to mount the filesystems in userland, export */ 4935 if (exp) 4936 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 4937 B_FALSE, B_FALSE); 4938 4939 return (error); 4940 4941out: 4942 spa_unload(newspa); 4943 spa_deactivate(newspa); 4944 spa_remove(newspa); 4945 4946 txg = spa_vdev_config_enter(spa); 4947 4948 /* re-online all offlined disks */ 4949 for (c = 0; c < children; c++) { 4950 if (vml[c] != NULL) 4951 vml[c]->vdev_offline = B_FALSE; 4952 } 4953 vdev_reopen(spa->spa_root_vdev); 4954 4955 nvlist_free(spa->spa_config_splitting); 4956 spa->spa_config_splitting = NULL; 4957 (void) spa_vdev_exit(spa, NULL, txg, error); 4958 4959 kmem_free(vml, children * sizeof (vdev_t *)); 4960 return (error); 4961} 4962 4963static nvlist_t * 4964spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) 4965{ 4966 for (int i = 0; i < count; i++) { 4967 uint64_t guid; 4968 4969 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, 4970 &guid) == 0); 4971 4972 if (guid == target_guid) 4973 return (nvpp[i]); 4974 } 4975 4976 return (NULL); 4977} 4978 4979static void 4980spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, 4981 nvlist_t *dev_to_remove) 4982{ 4983 nvlist_t **newdev = NULL; 4984 4985 if (count > 1) 4986 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); 4987 4988 for (int i = 0, j = 0; i < count; i++) { 4989 if (dev[i] == dev_to_remove) 4990 continue; 4991 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); 4992 } 4993 4994 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); 4995 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); 4996 4997 for (int i = 0; i < count - 1; i++) 4998 nvlist_free(newdev[i]); 4999 5000 if (count > 1) 5001 kmem_free(newdev, (count - 1) * sizeof (void *)); 5002} 5003 5004/* 5005 * Evacuate the device. 5006 */ 5007static int 5008spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) 5009{ 5010 uint64_t txg; 5011 int error = 0; 5012 5013 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5014 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5015 ASSERT(vd == vd->vdev_top); 5016 5017 /* 5018 * Evacuate the device. We don't hold the config lock as writer 5019 * since we need to do I/O but we do keep the 5020 * spa_namespace_lock held. Once this completes the device 5021 * should no longer have any blocks allocated on it. 5022 */ 5023 if (vd->vdev_islog) { 5024 if (vd->vdev_stat.vs_alloc != 0) 5025 error = spa_offline_log(spa); 5026 } else { 5027 error = ENOTSUP; 5028 } 5029 5030 if (error) 5031 return (error); 5032 5033 /* 5034 * The evacuation succeeded. Remove any remaining MOS metadata 5035 * associated with this vdev, and wait for these changes to sync. 5036 */ 5037 ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); 5038 txg = spa_vdev_config_enter(spa); 5039 vd->vdev_removing = B_TRUE; 5040 vdev_dirty(vd, 0, NULL, txg); 5041 vdev_config_dirty(vd); 5042 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5043 5044 return (0); 5045} 5046 5047/* 5048 * Complete the removal by cleaning up the namespace. 5049 */ 5050static void 5051spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd) 5052{ 5053 vdev_t *rvd = spa->spa_root_vdev; 5054 uint64_t id = vd->vdev_id; 5055 boolean_t last_vdev = (id == (rvd->vdev_children - 1)); 5056 5057 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5058 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 5059 ASSERT(vd == vd->vdev_top); 5060 5061 /* 5062 * Only remove any devices which are empty. 5063 */ 5064 if (vd->vdev_stat.vs_alloc != 0) 5065 return; 5066 5067 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 5068 5069 if (list_link_active(&vd->vdev_state_dirty_node)) 5070 vdev_state_clean(vd); 5071 if (list_link_active(&vd->vdev_config_dirty_node)) 5072 vdev_config_clean(vd); 5073 5074 vdev_free(vd); 5075 5076 if (last_vdev) { 5077 vdev_compact_children(rvd); 5078 } else { 5079 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); 5080 vdev_add_child(rvd, vd); 5081 } 5082 vdev_config_dirty(rvd); 5083 5084 /* 5085 * Reassess the health of our root vdev. 5086 */ 5087 vdev_reopen(rvd); 5088} 5089 5090/* 5091 * Remove a device from the pool - 5092 * 5093 * Removing a device from the vdev namespace requires several steps 5094 * and can take a significant amount of time. As a result we use 5095 * the spa_vdev_config_[enter/exit] functions which allow us to 5096 * grab and release the spa_config_lock while still holding the namespace 5097 * lock. During each step the configuration is synced out. 5098 */ 5099 5100/* 5101 * Remove a device from the pool. Currently, this supports removing only hot 5102 * spares, slogs, and level 2 ARC devices. 5103 */ 5104int 5105spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) 5106{ 5107 vdev_t *vd; 5108 metaslab_group_t *mg; 5109 nvlist_t **spares, **l2cache, *nv; 5110 uint64_t txg = 0; 5111 uint_t nspares, nl2cache; 5112 int error = 0; 5113 boolean_t locked = MUTEX_HELD(&spa_namespace_lock); 5114 5115 ASSERT(spa_writeable(spa)); 5116 5117 if (!locked) 5118 txg = spa_vdev_enter(spa); 5119 5120 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 5121 5122 if (spa->spa_spares.sav_vdevs != NULL && 5123 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 5124 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && 5125 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { 5126 /* 5127 * Only remove the hot spare if it's not currently in use 5128 * in this pool. 5129 */ 5130 if (vd == NULL || unspare) { 5131 spa_vdev_remove_aux(spa->spa_spares.sav_config, 5132 ZPOOL_CONFIG_SPARES, spares, nspares, nv); 5133 spa_load_spares(spa); 5134 spa->spa_spares.sav_sync = B_TRUE; 5135 } else { 5136 error = EBUSY; 5137 } 5138 } else if (spa->spa_l2cache.sav_vdevs != NULL && 5139 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 5140 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && 5141 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { 5142 /* 5143 * Cache devices can always be removed. 5144 */ 5145 spa_vdev_remove_aux(spa->spa_l2cache.sav_config, 5146 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); 5147 spa_load_l2cache(spa); 5148 spa->spa_l2cache.sav_sync = B_TRUE; 5149 } else if (vd != NULL && vd->vdev_islog) { 5150 ASSERT(!locked); 5151 ASSERT(vd == vd->vdev_top); 5152 5153 /* 5154 * XXX - Once we have bp-rewrite this should 5155 * become the common case. 5156 */ 5157 5158 mg = vd->vdev_mg; 5159 5160 /* 5161 * Stop allocating from this vdev. 5162 */ 5163 metaslab_group_passivate(mg); 5164 5165 /* 5166 * Wait for the youngest allocations and frees to sync, 5167 * and then wait for the deferral of those frees to finish. 5168 */ 5169 spa_vdev_config_exit(spa, NULL, 5170 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); 5171 5172 /* 5173 * Attempt to evacuate the vdev. 5174 */ 5175 error = spa_vdev_remove_evacuate(spa, vd); 5176 5177 txg = spa_vdev_config_enter(spa); 5178 5179 /* 5180 * If we couldn't evacuate the vdev, unwind. 5181 */ 5182 if (error) { 5183 metaslab_group_activate(mg); 5184 return (spa_vdev_exit(spa, NULL, txg, error)); 5185 } 5186 5187 /* 5188 * Clean up the vdev namespace. 5189 */ 5190 spa_vdev_remove_from_namespace(spa, vd); 5191 5192 } else if (vd != NULL) { 5193 /* 5194 * Normal vdevs cannot be removed (yet). 5195 */ 5196 error = ENOTSUP; 5197 } else { 5198 /* 5199 * There is no vdev of any kind with the specified guid. 5200 */ 5201 error = ENOENT; 5202 } 5203 5204 if (!locked) 5205 return (spa_vdev_exit(spa, NULL, txg, error)); 5206 5207 return (error); 5208} 5209 5210/* 5211 * Find any device that's done replacing, or a vdev marked 'unspare' that's 5212 * current spared, so we can detach it. 5213 */ 5214static vdev_t * 5215spa_vdev_resilver_done_hunt(vdev_t *vd) 5216{ 5217 vdev_t *newvd, *oldvd; 5218 5219 for (int c = 0; c < vd->vdev_children; c++) { 5220 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 5221 if (oldvd != NULL) 5222 return (oldvd); 5223 } 5224 5225 /* 5226 * Check for a completed replacement. We always consider the first 5227 * vdev in the list to be the oldest vdev, and the last one to be 5228 * the newest (see spa_vdev_attach() for how that works). In 5229 * the case where the newest vdev is faulted, we will not automatically 5230 * remove it after a resilver completes. This is OK as it will require 5231 * user intervention to determine which disk the admin wishes to keep. 5232 */ 5233 if (vd->vdev_ops == &vdev_replacing_ops) { 5234 ASSERT(vd->vdev_children > 1); 5235 5236 newvd = vd->vdev_child[vd->vdev_children - 1]; 5237 oldvd = vd->vdev_child[0]; 5238 5239 if (vdev_dtl_empty(newvd, DTL_MISSING) && 5240 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5241 !vdev_dtl_required(oldvd)) 5242 return (oldvd); 5243 } 5244 5245 /* 5246 * Check for a completed resilver with the 'unspare' flag set. 5247 */ 5248 if (vd->vdev_ops == &vdev_spare_ops) { 5249 vdev_t *first = vd->vdev_child[0]; 5250 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 5251 5252 if (last->vdev_unspare) { 5253 oldvd = first; 5254 newvd = last; 5255 } else if (first->vdev_unspare) { 5256 oldvd = last; 5257 newvd = first; 5258 } else { 5259 oldvd = NULL; 5260 } 5261 5262 if (oldvd != NULL && 5263 vdev_dtl_empty(newvd, DTL_MISSING) && 5264 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5265 !vdev_dtl_required(oldvd)) 5266 return (oldvd); 5267 5268 /* 5269 * If there are more than two spares attached to a disk, 5270 * and those spares are not required, then we want to 5271 * attempt to free them up now so that they can be used 5272 * by other pools. Once we're back down to a single 5273 * disk+spare, we stop removing them. 5274 */ 5275 if (vd->vdev_children > 2) { 5276 newvd = vd->vdev_child[1]; 5277 5278 if (newvd->vdev_isspare && last->vdev_isspare && 5279 vdev_dtl_empty(last, DTL_MISSING) && 5280 vdev_dtl_empty(last, DTL_OUTAGE) && 5281 !vdev_dtl_required(newvd)) 5282 return (newvd); 5283 } 5284 } 5285 5286 return (NULL); 5287} 5288 5289static void 5290spa_vdev_resilver_done(spa_t *spa) 5291{ 5292 vdev_t *vd, *pvd, *ppvd; 5293 uint64_t guid, sguid, pguid, ppguid; 5294 5295 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5296 5297 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 5298 pvd = vd->vdev_parent; 5299 ppvd = pvd->vdev_parent; 5300 guid = vd->vdev_guid; 5301 pguid = pvd->vdev_guid; 5302 ppguid = ppvd->vdev_guid; 5303 sguid = 0; 5304 /* 5305 * If we have just finished replacing a hot spared device, then 5306 * we need to detach the parent's first child (the original hot 5307 * spare) as well. 5308 */ 5309 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 5310 ppvd->vdev_children == 2) { 5311 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 5312 sguid = ppvd->vdev_child[1]->vdev_guid; 5313 } 5314 spa_config_exit(spa, SCL_ALL, FTAG); 5315 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 5316 return; 5317 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 5318 return; 5319 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5320 } 5321 5322 spa_config_exit(spa, SCL_ALL, FTAG); 5323} 5324 5325/* 5326 * Update the stored path or FRU for this vdev. 5327 */ 5328int 5329spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 5330 boolean_t ispath) 5331{ 5332 vdev_t *vd; 5333 boolean_t sync = B_FALSE; 5334 5335 ASSERT(spa_writeable(spa)); 5336 5337 spa_vdev_state_enter(spa, SCL_ALL); 5338 5339 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 5340 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 5341 5342 if (!vd->vdev_ops->vdev_op_leaf) 5343 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 5344 5345 if (ispath) { 5346 if (strcmp(value, vd->vdev_path) != 0) { 5347 spa_strfree(vd->vdev_path); 5348 vd->vdev_path = spa_strdup(value); 5349 sync = B_TRUE; 5350 } 5351 } else { 5352 if (vd->vdev_fru == NULL) { 5353 vd->vdev_fru = spa_strdup(value); 5354 sync = B_TRUE; 5355 } else if (strcmp(value, vd->vdev_fru) != 0) { 5356 spa_strfree(vd->vdev_fru); 5357 vd->vdev_fru = spa_strdup(value); 5358 sync = B_TRUE; 5359 } 5360 } 5361 5362 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 5363} 5364 5365int 5366spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 5367{ 5368 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 5369} 5370 5371int 5372spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 5373{ 5374 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 5375} 5376 5377/* 5378 * ========================================================================== 5379 * SPA Scanning 5380 * ========================================================================== 5381 */ 5382 5383int 5384spa_scan_stop(spa_t *spa) 5385{ 5386 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5387 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 5388 return (EBUSY); 5389 return (dsl_scan_cancel(spa->spa_dsl_pool)); 5390} 5391 5392int 5393spa_scan(spa_t *spa, pool_scan_func_t func) 5394{ 5395 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5396 5397 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 5398 return (ENOTSUP); 5399 5400 /* 5401 * If a resilver was requested, but there is no DTL on a 5402 * writeable leaf device, we have nothing to do. 5403 */ 5404 if (func == POOL_SCAN_RESILVER && 5405 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 5406 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 5407 return (0); 5408 } 5409 5410 return (dsl_scan(spa->spa_dsl_pool, func)); 5411} 5412 5413/* 5414 * ========================================================================== 5415 * SPA async task processing 5416 * ========================================================================== 5417 */ 5418 5419static void 5420spa_async_remove(spa_t *spa, vdev_t *vd) 5421{ 5422 if (vd->vdev_remove_wanted) { 5423 vd->vdev_remove_wanted = B_FALSE; 5424 vd->vdev_delayed_close = B_FALSE; 5425 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 5426 5427 /* 5428 * We want to clear the stats, but we don't want to do a full 5429 * vdev_clear() as that will cause us to throw away 5430 * degraded/faulted state as well as attempt to reopen the 5431 * device, all of which is a waste. 5432 */ 5433 vd->vdev_stat.vs_read_errors = 0; 5434 vd->vdev_stat.vs_write_errors = 0; 5435 vd->vdev_stat.vs_checksum_errors = 0; 5436 5437 vdev_state_dirty(vd->vdev_top); 5438 } 5439 5440 for (int c = 0; c < vd->vdev_children; c++) 5441 spa_async_remove(spa, vd->vdev_child[c]); 5442} 5443 5444static void 5445spa_async_probe(spa_t *spa, vdev_t *vd) 5446{ 5447 if (vd->vdev_probe_wanted) { 5448 vd->vdev_probe_wanted = B_FALSE; 5449 vdev_reopen(vd); /* vdev_open() does the actual probe */ 5450 } 5451 5452 for (int c = 0; c < vd->vdev_children; c++) 5453 spa_async_probe(spa, vd->vdev_child[c]); 5454} 5455 5456static void 5457spa_async_autoexpand(spa_t *spa, vdev_t *vd) 5458{ 5459 sysevent_id_t eid; 5460 nvlist_t *attr; 5461 char *physpath; 5462 5463 if (!spa->spa_autoexpand) 5464 return; 5465 5466 for (int c = 0; c < vd->vdev_children; c++) { 5467 vdev_t *cvd = vd->vdev_child[c]; 5468 spa_async_autoexpand(spa, cvd); 5469 } 5470 5471 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 5472 return; 5473 5474 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 5475 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 5476 5477 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5478 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); 5479 5480 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, 5481 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP); 5482 5483 nvlist_free(attr); 5484 kmem_free(physpath, MAXPATHLEN); 5485} 5486 5487static void 5488spa_async_thread(void *arg) 5489{ 5490 spa_t *spa = arg; 5491 int tasks; 5492 5493 ASSERT(spa->spa_sync_on); 5494 5495 mutex_enter(&spa->spa_async_lock); 5496 tasks = spa->spa_async_tasks; 5497 spa->spa_async_tasks = 0; 5498 mutex_exit(&spa->spa_async_lock); 5499 5500 /* 5501 * See if the config needs to be updated. 5502 */ 5503 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 5504 uint64_t old_space, new_space; 5505 5506 mutex_enter(&spa_namespace_lock); 5507 old_space = metaslab_class_get_space(spa_normal_class(spa)); 5508 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5509 new_space = metaslab_class_get_space(spa_normal_class(spa)); 5510 mutex_exit(&spa_namespace_lock); 5511 5512 /* 5513 * If the pool grew as a result of the config update, 5514 * then log an internal history event. 5515 */ 5516 if (new_space != old_space) { 5517 spa_history_log_internal(LOG_POOL_VDEV_ONLINE, 5518 spa, NULL, 5519 "pool '%s' size: %llu(+%llu)", 5520 spa_name(spa), new_space, new_space - old_space); 5521 } 5522 } 5523 5524 /* 5525 * See if any devices need to be marked REMOVED. 5526 */ 5527 if (tasks & SPA_ASYNC_REMOVE) { 5528 spa_vdev_state_enter(spa, SCL_NONE); 5529 spa_async_remove(spa, spa->spa_root_vdev); 5530 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 5531 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 5532 for (int i = 0; i < spa->spa_spares.sav_count; i++) 5533 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 5534 (void) spa_vdev_state_exit(spa, NULL, 0); 5535 } 5536 5537 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 5538 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5539 spa_async_autoexpand(spa, spa->spa_root_vdev); 5540 spa_config_exit(spa, SCL_CONFIG, FTAG); 5541 } 5542 5543 /* 5544 * See if any devices need to be probed. 5545 */ 5546 if (tasks & SPA_ASYNC_PROBE) { 5547 spa_vdev_state_enter(spa, SCL_NONE); 5548 spa_async_probe(spa, spa->spa_root_vdev); 5549 (void) spa_vdev_state_exit(spa, NULL, 0); 5550 } 5551 5552 /* 5553 * If any devices are done replacing, detach them. 5554 */ 5555 if (tasks & SPA_ASYNC_RESILVER_DONE) 5556 spa_vdev_resilver_done(spa); 5557 5558 /* 5559 * Kick off a resilver. 5560 */ 5561 if (tasks & SPA_ASYNC_RESILVER) 5562 dsl_resilver_restart(spa->spa_dsl_pool, 0); 5563 5564 /* 5565 * Let the world know that we're done. 5566 */ 5567 mutex_enter(&spa->spa_async_lock); 5568 spa->spa_async_thread = NULL; 5569 cv_broadcast(&spa->spa_async_cv); 5570 mutex_exit(&spa->spa_async_lock); 5571 thread_exit(); 5572} 5573 5574void 5575spa_async_suspend(spa_t *spa) 5576{ 5577 mutex_enter(&spa->spa_async_lock); 5578 spa->spa_async_suspended++; 5579 while (spa->spa_async_thread != NULL) 5580 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 5581 mutex_exit(&spa->spa_async_lock); 5582} 5583 5584void 5585spa_async_resume(spa_t *spa) 5586{ 5587 mutex_enter(&spa->spa_async_lock); 5588 ASSERT(spa->spa_async_suspended != 0); 5589 spa->spa_async_suspended--; 5590 mutex_exit(&spa->spa_async_lock); 5591} 5592 5593static void 5594spa_async_dispatch(spa_t *spa) 5595{ 5596 mutex_enter(&spa->spa_async_lock); 5597 if (spa->spa_async_tasks && !spa->spa_async_suspended && 5598 spa->spa_async_thread == NULL && 5599 rootdir != NULL && !vn_is_readonly(rootdir)) 5600 spa->spa_async_thread = thread_create(NULL, 0, 5601 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 5602 mutex_exit(&spa->spa_async_lock); 5603} 5604 5605void 5606spa_async_request(spa_t *spa, int task) 5607{ 5608 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 5609 mutex_enter(&spa->spa_async_lock); 5610 spa->spa_async_tasks |= task; 5611 mutex_exit(&spa->spa_async_lock); 5612} 5613 5614/* 5615 * ========================================================================== 5616 * SPA syncing routines 5617 * ========================================================================== 5618 */ 5619 5620static int 5621bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 5622{ 5623 bpobj_t *bpo = arg; 5624 bpobj_enqueue(bpo, bp, tx); 5625 return (0); 5626} 5627 5628static int 5629spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 5630{ 5631 zio_t *zio = arg; 5632 5633 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 5634 zio->io_flags)); 5635 return (0); 5636} 5637 5638static void 5639spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 5640{ 5641 char *packed = NULL; 5642 size_t bufsize; 5643 size_t nvsize = 0; 5644 dmu_buf_t *db; 5645 5646 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 5647 5648 /* 5649 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 5650 * information. This avoids the dbuf_will_dirty() path and 5651 * saves us a pre-read to get data we don't actually care about. 5652 */ 5653 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 5654 packed = kmem_alloc(bufsize, KM_SLEEP); 5655 5656 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 5657 KM_SLEEP) == 0); 5658 bzero(packed + nvsize, bufsize - nvsize); 5659 5660 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 5661 5662 kmem_free(packed, bufsize); 5663 5664 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 5665 dmu_buf_will_dirty(db, tx); 5666 *(uint64_t *)db->db_data = nvsize; 5667 dmu_buf_rele(db, FTAG); 5668} 5669 5670static void 5671spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 5672 const char *config, const char *entry) 5673{ 5674 nvlist_t *nvroot; 5675 nvlist_t **list; 5676 int i; 5677 5678 if (!sav->sav_sync) 5679 return; 5680 5681 /* 5682 * Update the MOS nvlist describing the list of available devices. 5683 * spa_validate_aux() will have already made sure this nvlist is 5684 * valid and the vdevs are labeled appropriately. 5685 */ 5686 if (sav->sav_object == 0) { 5687 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 5688 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 5689 sizeof (uint64_t), tx); 5690 VERIFY(zap_update(spa->spa_meta_objset, 5691 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 5692 &sav->sav_object, tx) == 0); 5693 } 5694 5695 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5696 if (sav->sav_count == 0) { 5697 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 5698 } else { 5699 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 5700 for (i = 0; i < sav->sav_count; i++) 5701 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 5702 B_FALSE, VDEV_CONFIG_L2CACHE); 5703 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 5704 sav->sav_count) == 0); 5705 for (i = 0; i < sav->sav_count; i++) 5706 nvlist_free(list[i]); 5707 kmem_free(list, sav->sav_count * sizeof (void *)); 5708 } 5709 5710 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 5711 nvlist_free(nvroot); 5712 5713 sav->sav_sync = B_FALSE; 5714} 5715 5716static void 5717spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 5718{ 5719 nvlist_t *config; 5720 5721 if (list_is_empty(&spa->spa_config_dirty_list)) 5722 return; 5723 5724 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 5725 5726 config = spa_config_generate(spa, spa->spa_root_vdev, 5727 dmu_tx_get_txg(tx), B_FALSE); 5728 5729 spa_config_exit(spa, SCL_STATE, FTAG); 5730 5731 if (spa->spa_config_syncing) 5732 nvlist_free(spa->spa_config_syncing); 5733 spa->spa_config_syncing = config; 5734 5735 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 5736} 5737 5738static void 5739spa_sync_version(void *arg1, void *arg2, dmu_tx_t *tx) 5740{ 5741 spa_t *spa = arg1; 5742 uint64_t version = *(uint64_t *)arg2; 5743 5744 /* 5745 * Setting the version is special cased when first creating the pool. 5746 */ 5747 ASSERT(tx->tx_txg != TXG_INITIAL); 5748 5749 ASSERT(version <= SPA_VERSION); 5750 ASSERT(version >= spa_version(spa)); 5751 5752 spa->spa_uberblock.ub_version = version; 5753 vdev_config_dirty(spa->spa_root_vdev); 5754} 5755 5756/* 5757 * Set zpool properties. 5758 */ 5759static void 5760spa_sync_props(void *arg1, void *arg2, dmu_tx_t *tx) 5761{ 5762 spa_t *spa = arg1; 5763 objset_t *mos = spa->spa_meta_objset; 5764 nvlist_t *nvp = arg2; 5765 nvpair_t *elem = NULL; 5766 5767 mutex_enter(&spa->spa_props_lock); 5768 5769 while ((elem = nvlist_next_nvpair(nvp, elem))) { 5770 uint64_t intval; 5771 char *strval, *fname; 5772 zpool_prop_t prop; 5773 const char *propname; 5774 zprop_type_t proptype; 5775 zfeature_info_t *feature; 5776 5777 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 5778 case ZPROP_INVAL: 5779 /* 5780 * We checked this earlier in spa_prop_validate(). 5781 */ 5782 ASSERT(zpool_prop_feature(nvpair_name(elem))); 5783 5784 fname = strchr(nvpair_name(elem), '@') + 1; 5785 VERIFY3U(0, ==, zfeature_lookup_name(fname, &feature)); 5786 5787 spa_feature_enable(spa, feature, tx); 5788 break; 5789 5790 case ZPOOL_PROP_VERSION: 5791 VERIFY(nvpair_value_uint64(elem, &intval) == 0); 5792 /* 5793 * The version is synced seperatly before other 5794 * properties and should be correct by now. 5795 */ 5796 ASSERT3U(spa_version(spa), >=, intval); 5797 break; 5798 5799 case ZPOOL_PROP_ALTROOT: 5800 /* 5801 * 'altroot' is a non-persistent property. It should 5802 * have been set temporarily at creation or import time. 5803 */ 5804 ASSERT(spa->spa_root != NULL); 5805 break; 5806 5807 case ZPOOL_PROP_READONLY: 5808 case ZPOOL_PROP_CACHEFILE: 5809 /* 5810 * 'readonly' and 'cachefile' are also non-persisitent 5811 * properties. 5812 */ 5813 break; 5814 case ZPOOL_PROP_COMMENT: 5815 VERIFY(nvpair_value_string(elem, &strval) == 0); 5816 if (spa->spa_comment != NULL) 5817 spa_strfree(spa->spa_comment); 5818 spa->spa_comment = spa_strdup(strval); 5819 /* 5820 * We need to dirty the configuration on all the vdevs 5821 * so that their labels get updated. It's unnecessary 5822 * to do this for pool creation since the vdev's 5823 * configuratoin has already been dirtied. 5824 */ 5825 if (tx->tx_txg != TXG_INITIAL) 5826 vdev_config_dirty(spa->spa_root_vdev); 5827 break; 5828 default: 5829 /* 5830 * Set pool property values in the poolprops mos object. 5831 */ 5832 if (spa->spa_pool_props_object == 0) { 5833 spa->spa_pool_props_object = 5834 zap_create_link(mos, DMU_OT_POOL_PROPS, 5835 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 5836 tx); 5837 } 5838 5839 /* normalize the property name */ 5840 propname = zpool_prop_to_name(prop); 5841 proptype = zpool_prop_get_type(prop); 5842 5843 if (nvpair_type(elem) == DATA_TYPE_STRING) { 5844 ASSERT(proptype == PROP_TYPE_STRING); 5845 VERIFY(nvpair_value_string(elem, &strval) == 0); 5846 VERIFY(zap_update(mos, 5847 spa->spa_pool_props_object, propname, 5848 1, strlen(strval) + 1, strval, tx) == 0); 5849 5850 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 5851 VERIFY(nvpair_value_uint64(elem, &intval) == 0); 5852 5853 if (proptype == PROP_TYPE_INDEX) { 5854 const char *unused; 5855 VERIFY(zpool_prop_index_to_string( 5856 prop, intval, &unused) == 0); 5857 } 5858 VERIFY(zap_update(mos, 5859 spa->spa_pool_props_object, propname, 5860 8, 1, &intval, tx) == 0); 5861 } else { 5862 ASSERT(0); /* not allowed */ 5863 } 5864 5865 switch (prop) { 5866 case ZPOOL_PROP_DELEGATION: 5867 spa->spa_delegation = intval; 5868 break; 5869 case ZPOOL_PROP_BOOTFS: 5870 spa->spa_bootfs = intval; 5871 break; 5872 case ZPOOL_PROP_FAILUREMODE: 5873 spa->spa_failmode = intval; 5874 break; 5875 case ZPOOL_PROP_AUTOEXPAND: 5876 spa->spa_autoexpand = intval; 5877 if (tx->tx_txg != TXG_INITIAL) 5878 spa_async_request(spa, 5879 SPA_ASYNC_AUTOEXPAND); 5880 break; 5881 case ZPOOL_PROP_DEDUPDITTO: 5882 spa->spa_dedup_ditto = intval; 5883 break; 5884 default: 5885 break; 5886 } 5887 } 5888 5889 /* log internal history if this is not a zpool create */ 5890 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY && 5891 tx->tx_txg != TXG_INITIAL) { 5892 spa_history_log_internal(LOG_POOL_PROPSET, 5893 spa, tx, "%s %lld %s", 5894 nvpair_name(elem), intval, spa_name(spa)); 5895 } 5896 } 5897 5898 mutex_exit(&spa->spa_props_lock); 5899} 5900 5901/* 5902 * Perform one-time upgrade on-disk changes. spa_version() does not 5903 * reflect the new version this txg, so there must be no changes this 5904 * txg to anything that the upgrade code depends on after it executes. 5905 * Therefore this must be called after dsl_pool_sync() does the sync 5906 * tasks. 5907 */ 5908static void 5909spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 5910{ 5911 dsl_pool_t *dp = spa->spa_dsl_pool; 5912 5913 ASSERT(spa->spa_sync_pass == 1); 5914 5915 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 5916 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 5917 dsl_pool_create_origin(dp, tx); 5918 5919 /* Keeping the origin open increases spa_minref */ 5920 spa->spa_minref += 3; 5921 } 5922 5923 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 5924 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 5925 dsl_pool_upgrade_clones(dp, tx); 5926 } 5927 5928 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 5929 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 5930 dsl_pool_upgrade_dir_clones(dp, tx); 5931 5932 /* Keeping the freedir open increases spa_minref */ 5933 spa->spa_minref += 3; 5934 } 5935 5936 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 5937 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 5938 spa_feature_create_zap_objects(spa, tx); 5939 } 5940} 5941 5942/* 5943 * Sync the specified transaction group. New blocks may be dirtied as 5944 * part of the process, so we iterate until it converges. 5945 */ 5946void 5947spa_sync(spa_t *spa, uint64_t txg) 5948{ 5949 dsl_pool_t *dp = spa->spa_dsl_pool; 5950 objset_t *mos = spa->spa_meta_objset; 5951 bpobj_t *defer_bpo = &spa->spa_deferred_bpobj; 5952 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 5953 vdev_t *rvd = spa->spa_root_vdev; 5954 vdev_t *vd; 5955 dmu_tx_t *tx; 5956 int error; 5957 5958 VERIFY(spa_writeable(spa)); 5959 5960 /* 5961 * Lock out configuration changes. 5962 */ 5963 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5964 5965 spa->spa_syncing_txg = txg; 5966 spa->spa_sync_pass = 0; 5967 5968 /* 5969 * If there are any pending vdev state changes, convert them 5970 * into config changes that go out with this transaction group. 5971 */ 5972 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 5973 while (list_head(&spa->spa_state_dirty_list) != NULL) { 5974 /* 5975 * We need the write lock here because, for aux vdevs, 5976 * calling vdev_config_dirty() modifies sav_config. 5977 * This is ugly and will become unnecessary when we 5978 * eliminate the aux vdev wart by integrating all vdevs 5979 * into the root vdev tree. 5980 */ 5981 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 5982 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 5983 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 5984 vdev_state_clean(vd); 5985 vdev_config_dirty(vd); 5986 } 5987 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 5988 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 5989 } 5990 spa_config_exit(spa, SCL_STATE, FTAG); 5991 5992 tx = dmu_tx_create_assigned(dp, txg); 5993 5994 /* 5995 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 5996 * set spa_deflate if we have no raid-z vdevs. 5997 */ 5998 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 5999 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 6000 int i; 6001 6002 for (i = 0; i < rvd->vdev_children; i++) { 6003 vd = rvd->vdev_child[i]; 6004 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 6005 break; 6006 } 6007 if (i == rvd->vdev_children) { 6008 spa->spa_deflate = TRUE; 6009 VERIFY(0 == zap_add(spa->spa_meta_objset, 6010 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 6011 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 6012 } 6013 } 6014 6015 /* 6016 * If anything has changed in this txg, or if someone is waiting 6017 * for this txg to sync (eg, spa_vdev_remove()), push the 6018 * deferred frees from the previous txg. If not, leave them 6019 * alone so that we don't generate work on an otherwise idle 6020 * system. 6021 */ 6022 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || 6023 !txg_list_empty(&dp->dp_dirty_dirs, txg) || 6024 !txg_list_empty(&dp->dp_sync_tasks, txg) || 6025 ((dsl_scan_active(dp->dp_scan) || 6026 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) { 6027 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6028 VERIFY3U(bpobj_iterate(defer_bpo, 6029 spa_free_sync_cb, zio, tx), ==, 0); 6030 VERIFY3U(zio_wait(zio), ==, 0); 6031 } 6032 6033 /* 6034 * Iterate to convergence. 6035 */ 6036 do { 6037 int pass = ++spa->spa_sync_pass; 6038 6039 spa_sync_config_object(spa, tx); 6040 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 6041 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 6042 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 6043 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 6044 spa_errlog_sync(spa, txg); 6045 dsl_pool_sync(dp, txg); 6046 6047 if (pass <= SYNC_PASS_DEFERRED_FREE) { 6048 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6049 bplist_iterate(free_bpl, spa_free_sync_cb, 6050 zio, tx); 6051 VERIFY(zio_wait(zio) == 0); 6052 } else { 6053 bplist_iterate(free_bpl, bpobj_enqueue_cb, 6054 defer_bpo, tx); 6055 } 6056 6057 ddt_sync(spa, txg); 6058 dsl_scan_sync(dp, tx); 6059 6060 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 6061 vdev_sync(vd, txg); 6062 6063 if (pass == 1) 6064 spa_sync_upgrades(spa, tx); 6065 6066 } while (dmu_objset_is_dirty(mos, txg)); 6067 6068 /* 6069 * Rewrite the vdev configuration (which includes the uberblock) 6070 * to commit the transaction group. 6071 * 6072 * If there are no dirty vdevs, we sync the uberblock to a few 6073 * random top-level vdevs that are known to be visible in the 6074 * config cache (see spa_vdev_add() for a complete description). 6075 * If there *are* dirty vdevs, sync the uberblock to all vdevs. 6076 */ 6077 for (;;) { 6078 /* 6079 * We hold SCL_STATE to prevent vdev open/close/etc. 6080 * while we're attempting to write the vdev labels. 6081 */ 6082 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6083 6084 if (list_is_empty(&spa->spa_config_dirty_list)) { 6085 vdev_t *svd[SPA_DVAS_PER_BP]; 6086 int svdcount = 0; 6087 int children = rvd->vdev_children; 6088 int c0 = spa_get_random(children); 6089 6090 for (int c = 0; c < children; c++) { 6091 vd = rvd->vdev_child[(c0 + c) % children]; 6092 if (vd->vdev_ms_array == 0 || vd->vdev_islog) 6093 continue; 6094 svd[svdcount++] = vd; 6095 if (svdcount == SPA_DVAS_PER_BP) 6096 break; 6097 } 6098 error = vdev_config_sync(svd, svdcount, txg, B_FALSE); 6099 if (error != 0) 6100 error = vdev_config_sync(svd, svdcount, txg, 6101 B_TRUE); 6102 } else { 6103 error = vdev_config_sync(rvd->vdev_child, 6104 rvd->vdev_children, txg, B_FALSE); 6105 if (error != 0) 6106 error = vdev_config_sync(rvd->vdev_child, 6107 rvd->vdev_children, txg, B_TRUE); 6108 } 6109 6110 spa_config_exit(spa, SCL_STATE, FTAG); 6111 6112 if (error == 0) 6113 break; 6114 zio_suspend(spa, NULL); 6115 zio_resume_wait(spa); 6116 } 6117 dmu_tx_commit(tx); 6118 6119 /* 6120 * Clear the dirty config list. 6121 */ 6122 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 6123 vdev_config_clean(vd); 6124 6125 /* 6126 * Now that the new config has synced transactionally, 6127 * let it become visible to the config cache. 6128 */ 6129 if (spa->spa_config_syncing != NULL) { 6130 spa_config_set(spa, spa->spa_config_syncing); 6131 spa->spa_config_txg = txg; 6132 spa->spa_config_syncing = NULL; 6133 } 6134 6135 spa->spa_ubsync = spa->spa_uberblock; 6136 6137 dsl_pool_sync_done(dp, txg); 6138 6139 /* 6140 * Update usable space statistics. 6141 */ 6142 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 6143 vdev_sync_done(vd, txg); 6144 6145 spa_update_dspace(spa); 6146 6147 /* 6148 * It had better be the case that we didn't dirty anything 6149 * since vdev_config_sync(). 6150 */ 6151 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 6152 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 6153 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 6154 6155 spa->spa_sync_pass = 0; 6156 6157 spa_config_exit(spa, SCL_CONFIG, FTAG); 6158 6159 spa_handle_ignored_writes(spa); 6160 6161 /* 6162 * If any async tasks have been requested, kick them off. 6163 */ 6164 spa_async_dispatch(spa); 6165} 6166 6167/* 6168 * Sync all pools. We don't want to hold the namespace lock across these 6169 * operations, so we take a reference on the spa_t and drop the lock during the 6170 * sync. 6171 */ 6172void 6173spa_sync_allpools(void) 6174{ 6175 spa_t *spa = NULL; 6176 mutex_enter(&spa_namespace_lock); 6177 while ((spa = spa_next(spa)) != NULL) { 6178 if (spa_state(spa) != POOL_STATE_ACTIVE || 6179 !spa_writeable(spa) || spa_suspended(spa)) 6180 continue; 6181 spa_open_ref(spa, FTAG); 6182 mutex_exit(&spa_namespace_lock); 6183 txg_wait_synced(spa_get_dsl(spa), 0); 6184 mutex_enter(&spa_namespace_lock); 6185 spa_close(spa, FTAG); 6186 } 6187 mutex_exit(&spa_namespace_lock); 6188} 6189 6190/* 6191 * ========================================================================== 6192 * Miscellaneous routines 6193 * ========================================================================== 6194 */ 6195 6196/* 6197 * Remove all pools in the system. 6198 */ 6199void 6200spa_evict_all(void) 6201{ 6202 spa_t *spa; 6203 6204 /* 6205 * Remove all cached state. All pools should be closed now, 6206 * so every spa in the AVL tree should be unreferenced. 6207 */ 6208 mutex_enter(&spa_namespace_lock); 6209 while ((spa = spa_next(NULL)) != NULL) { 6210 /* 6211 * Stop async tasks. The async thread may need to detach 6212 * a device that's been replaced, which requires grabbing 6213 * spa_namespace_lock, so we must drop it here. 6214 */ 6215 spa_open_ref(spa, FTAG); 6216 mutex_exit(&spa_namespace_lock); 6217 spa_async_suspend(spa); 6218 mutex_enter(&spa_namespace_lock); 6219 spa_close(spa, FTAG); 6220 6221 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 6222 spa_unload(spa); 6223 spa_deactivate(spa); 6224 } 6225 spa_remove(spa); 6226 } 6227 mutex_exit(&spa_namespace_lock); 6228} 6229 6230vdev_t * 6231spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 6232{ 6233 vdev_t *vd; 6234 int i; 6235 6236 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 6237 return (vd); 6238 6239 if (aux) { 6240 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 6241 vd = spa->spa_l2cache.sav_vdevs[i]; 6242 if (vd->vdev_guid == guid) 6243 return (vd); 6244 } 6245 6246 for (i = 0; i < spa->spa_spares.sav_count; i++) { 6247 vd = spa->spa_spares.sav_vdevs[i]; 6248 if (vd->vdev_guid == guid) 6249 return (vd); 6250 } 6251 } 6252 6253 return (NULL); 6254} 6255 6256void 6257spa_upgrade(spa_t *spa, uint64_t version) 6258{ 6259 ASSERT(spa_writeable(spa)); 6260 6261 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 6262 6263 /* 6264 * This should only be called for a non-faulted pool, and since a 6265 * future version would result in an unopenable pool, this shouldn't be 6266 * possible. 6267 */ 6268 ASSERT(spa->spa_uberblock.ub_version <= SPA_VERSION); 6269 ASSERT(version >= spa->spa_uberblock.ub_version); 6270 6271 spa->spa_uberblock.ub_version = version; 6272 vdev_config_dirty(spa->spa_root_vdev); 6273 6274 spa_config_exit(spa, SCL_ALL, FTAG); 6275 6276 txg_wait_synced(spa_get_dsl(spa), 0); 6277} 6278 6279boolean_t 6280spa_has_spare(spa_t *spa, uint64_t guid) 6281{ 6282 int i; 6283 uint64_t spareguid; 6284 spa_aux_vdev_t *sav = &spa->spa_spares; 6285 6286 for (i = 0; i < sav->sav_count; i++) 6287 if (sav->sav_vdevs[i]->vdev_guid == guid) 6288 return (B_TRUE); 6289 6290 for (i = 0; i < sav->sav_npending; i++) { 6291 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 6292 &spareguid) == 0 && spareguid == guid) 6293 return (B_TRUE); 6294 } 6295 6296 return (B_FALSE); 6297} 6298 6299/* 6300 * Check if a pool has an active shared spare device. 6301 * Note: reference count of an active spare is 2, as a spare and as a replace 6302 */ 6303static boolean_t 6304spa_has_active_shared_spare(spa_t *spa) 6305{ 6306 int i, refcnt; 6307 uint64_t pool; 6308 spa_aux_vdev_t *sav = &spa->spa_spares; 6309 6310 for (i = 0; i < sav->sav_count; i++) { 6311 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 6312 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 6313 refcnt > 2) 6314 return (B_TRUE); 6315 } 6316 6317 return (B_FALSE); 6318} 6319 6320/* 6321 * Post a sysevent corresponding to the given event. The 'name' must be one of 6322 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 6323 * filled in from the spa and (optionally) the vdev. This doesn't do anything 6324 * in the userland libzpool, as we don't want consumers to misinterpret ztest 6325 * or zdb as real changes. 6326 */ 6327void 6328spa_event_notify(spa_t *spa, vdev_t *vd, const char *name) 6329{ 6330#ifdef _KERNEL 6331 sysevent_t *ev; 6332 sysevent_attr_list_t *attr = NULL; 6333 sysevent_value_t value; 6334 sysevent_id_t eid; 6335 6336 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 6337 SE_SLEEP); 6338 6339 value.value_type = SE_DATA_TYPE_STRING; 6340 value.value.sv_string = spa_name(spa); 6341 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 6342 goto done; 6343 6344 value.value_type = SE_DATA_TYPE_UINT64; 6345 value.value.sv_uint64 = spa_guid(spa); 6346 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 6347 goto done; 6348 6349 if (vd) { 6350 value.value_type = SE_DATA_TYPE_UINT64; 6351 value.value.sv_uint64 = vd->vdev_guid; 6352 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 6353 SE_SLEEP) != 0) 6354 goto done; 6355 6356 if (vd->vdev_path) { 6357 value.value_type = SE_DATA_TYPE_STRING; 6358 value.value.sv_string = vd->vdev_path; 6359 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 6360 &value, SE_SLEEP) != 0) 6361 goto done; 6362 } 6363 } 6364 6365 if (sysevent_attach_attributes(ev, attr) != 0) 6366 goto done; 6367 attr = NULL; 6368 6369 (void) log_sysevent(ev, SE_SLEEP, &eid); 6370 6371done: 6372 if (attr) 6373 sysevent_free_attr(attr); 6374 sysevent_free(ev); 6375#endif 6376} 6377