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