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.
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.
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]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2011, 2020 by Delphix. All rights reserved.
25 * Copyright 2017 Nexenta Systems, Inc.
26 * Copyright (c) 2014 Integros [integros.com]
27 * Copyright 2016 Toomas Soome <tsoome@me.com>
28 * Copyright 2017 Joyent, Inc.
29 * Copyright (c) 2017, Intel Corporation.
30 * Copyright (c) 2019, Datto Inc. All rights reserved.
33 #include <sys/zfs_context.h>
34 #include <sys/fm/fs/zfs.h>
36 #include <sys/spa_impl.h>
37 #include <sys/bpobj.h>
39 #include <sys/dmu_tx.h>
40 #include <sys/dsl_dir.h>
41 #include <sys/vdev_impl.h>
42 #include <sys/vdev_rebuild.h>
43 #include <sys/uberblock_impl.h>
44 #include <sys/metaslab.h>
45 #include <sys/metaslab_impl.h>
46 #include <sys/space_map.h>
47 #include <sys/space_reftree.h>
50 #include <sys/fs/zfs.h>
53 #include <sys/dsl_scan.h>
55 #include <sys/vdev_initialize.h>
56 #include <sys/vdev_trim.h>
58 #include <sys/zfs_ratelimit.h>
60 /* default target for number of metaslabs per top-level vdev */
61 int zfs_vdev_default_ms_count = 200;
63 /* minimum number of metaslabs per top-level vdev */
64 int zfs_vdev_min_ms_count = 16;
66 /* practical upper limit of total metaslabs per top-level vdev */
67 int zfs_vdev_ms_count_limit = 1ULL << 17;
69 /* lower limit for metaslab size (512M) */
70 int zfs_vdev_default_ms_shift = 29;
72 /* upper limit for metaslab size (16G) */
73 int zfs_vdev_max_ms_shift = 34;
75 int vdev_validate_skip = B_FALSE;
78 * Since the DTL space map of a vdev is not expected to have a lot of
79 * entries, we default its block size to 4K.
81 int zfs_vdev_dtl_sm_blksz = (1 << 12);
84 * Rate limit slow IO (delay) events to this many per second.
86 unsigned int zfs_slow_io_events_per_second = 20;
89 * Rate limit checksum events after this many checksum errors per second.
91 unsigned int zfs_checksum_events_per_second = 20;
94 * Ignore errors during scrub/resilver. Allows to work around resilver
95 * upon import when there are pool errors.
97 int zfs_scan_ignore_errors = 0;
100 * vdev-wide space maps that have lots of entries written to them at
101 * the end of each transaction can benefit from a higher I/O bandwidth
102 * (e.g. vdev_obsolete_sm), thus we default their block size to 128K.
104 int zfs_vdev_standard_sm_blksz = (1 << 17);
107 * Tunable parameter for debugging or performance analysis. Setting this
108 * will cause pool corruption on power loss if a volatile out-of-order
109 * write cache is enabled.
111 int zfs_nocacheflush = 0;
113 uint64_t zfs_vdev_max_auto_ashift = ASHIFT_MAX;
114 uint64_t zfs_vdev_min_auto_ashift = ASHIFT_MIN;
118 vdev_dbgmsg(vdev_t *vd, const char *fmt, ...)
124 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
127 if (vd->vdev_path != NULL) {
128 zfs_dbgmsg("%s vdev '%s': %s", vd->vdev_ops->vdev_op_type,
131 zfs_dbgmsg("%s-%llu vdev (guid %llu): %s",
132 vd->vdev_ops->vdev_op_type,
133 (u_longlong_t)vd->vdev_id,
134 (u_longlong_t)vd->vdev_guid, buf);
139 vdev_dbgmsg_print_tree(vdev_t *vd, int indent)
143 if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops) {
144 zfs_dbgmsg("%*svdev %u: %s", indent, "", vd->vdev_id,
145 vd->vdev_ops->vdev_op_type);
149 switch (vd->vdev_state) {
150 case VDEV_STATE_UNKNOWN:
151 (void) snprintf(state, sizeof (state), "unknown");
153 case VDEV_STATE_CLOSED:
154 (void) snprintf(state, sizeof (state), "closed");
156 case VDEV_STATE_OFFLINE:
157 (void) snprintf(state, sizeof (state), "offline");
159 case VDEV_STATE_REMOVED:
160 (void) snprintf(state, sizeof (state), "removed");
162 case VDEV_STATE_CANT_OPEN:
163 (void) snprintf(state, sizeof (state), "can't open");
165 case VDEV_STATE_FAULTED:
166 (void) snprintf(state, sizeof (state), "faulted");
168 case VDEV_STATE_DEGRADED:
169 (void) snprintf(state, sizeof (state), "degraded");
171 case VDEV_STATE_HEALTHY:
172 (void) snprintf(state, sizeof (state), "healthy");
175 (void) snprintf(state, sizeof (state), "<state %u>",
176 (uint_t)vd->vdev_state);
179 zfs_dbgmsg("%*svdev %u: %s%s, guid: %llu, path: %s, %s", indent,
180 "", (int)vd->vdev_id, vd->vdev_ops->vdev_op_type,
181 vd->vdev_islog ? " (log)" : "",
182 (u_longlong_t)vd->vdev_guid,
183 vd->vdev_path ? vd->vdev_path : "N/A", state);
185 for (uint64_t i = 0; i < vd->vdev_children; i++)
186 vdev_dbgmsg_print_tree(vd->vdev_child[i], indent + 2);
190 * Virtual device management.
193 static vdev_ops_t *vdev_ops_table[] = {
208 * Given a vdev type, return the appropriate ops vector.
211 vdev_getops(const char *type)
213 vdev_ops_t *ops, **opspp;
215 for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++)
216 if (strcmp(ops->vdev_op_type, type) == 0)
224 vdev_default_xlate(vdev_t *vd, const range_seg64_t *in, range_seg64_t *res)
226 res->rs_start = in->rs_start;
227 res->rs_end = in->rs_end;
231 * Derive the enumerated allocation bias from string input.
232 * String origin is either the per-vdev zap or zpool(1M).
234 static vdev_alloc_bias_t
235 vdev_derive_alloc_bias(const char *bias)
237 vdev_alloc_bias_t alloc_bias = VDEV_BIAS_NONE;
239 if (strcmp(bias, VDEV_ALLOC_BIAS_LOG) == 0)
240 alloc_bias = VDEV_BIAS_LOG;
241 else if (strcmp(bias, VDEV_ALLOC_BIAS_SPECIAL) == 0)
242 alloc_bias = VDEV_BIAS_SPECIAL;
243 else if (strcmp(bias, VDEV_ALLOC_BIAS_DEDUP) == 0)
244 alloc_bias = VDEV_BIAS_DEDUP;
250 * Default asize function: return the MAX of psize with the asize of
251 * all children. This is what's used by anything other than RAID-Z.
254 vdev_default_asize(vdev_t *vd, uint64_t psize)
256 uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift);
259 for (int c = 0; c < vd->vdev_children; c++) {
260 csize = vdev_psize_to_asize(vd->vdev_child[c], psize);
261 asize = MAX(asize, csize);
268 * Get the minimum allocatable size. We define the allocatable size as
269 * the vdev's asize rounded to the nearest metaslab. This allows us to
270 * replace or attach devices which don't have the same physical size but
271 * can still satisfy the same number of allocations.
274 vdev_get_min_asize(vdev_t *vd)
276 vdev_t *pvd = vd->vdev_parent;
279 * If our parent is NULL (inactive spare or cache) or is the root,
280 * just return our own asize.
283 return (vd->vdev_asize);
286 * The top-level vdev just returns the allocatable size rounded
287 * to the nearest metaslab.
289 if (vd == vd->vdev_top)
290 return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift));
293 * The allocatable space for a raidz vdev is N * sizeof(smallest child),
294 * so each child must provide at least 1/Nth of its asize.
296 if (pvd->vdev_ops == &vdev_raidz_ops)
297 return ((pvd->vdev_min_asize + pvd->vdev_children - 1) /
300 return (pvd->vdev_min_asize);
304 vdev_set_min_asize(vdev_t *vd)
306 vd->vdev_min_asize = vdev_get_min_asize(vd);
308 for (int c = 0; c < vd->vdev_children; c++)
309 vdev_set_min_asize(vd->vdev_child[c]);
313 vdev_lookup_top(spa_t *spa, uint64_t vdev)
315 vdev_t *rvd = spa->spa_root_vdev;
317 ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0);
319 if (vdev < rvd->vdev_children) {
320 ASSERT(rvd->vdev_child[vdev] != NULL);
321 return (rvd->vdev_child[vdev]);
328 vdev_lookup_by_guid(vdev_t *vd, uint64_t guid)
332 if (vd->vdev_guid == guid)
335 for (int c = 0; c < vd->vdev_children; c++)
336 if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) !=
344 vdev_count_leaves_impl(vdev_t *vd)
348 if (vd->vdev_ops->vdev_op_leaf)
351 for (int c = 0; c < vd->vdev_children; c++)
352 n += vdev_count_leaves_impl(vd->vdev_child[c]);
358 vdev_count_leaves(spa_t *spa)
362 spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
363 rc = vdev_count_leaves_impl(spa->spa_root_vdev);
364 spa_config_exit(spa, SCL_VDEV, FTAG);
370 vdev_add_child(vdev_t *pvd, vdev_t *cvd)
372 size_t oldsize, newsize;
373 uint64_t id = cvd->vdev_id;
376 ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL);
377 ASSERT(cvd->vdev_parent == NULL);
379 cvd->vdev_parent = pvd;
384 ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL);
386 oldsize = pvd->vdev_children * sizeof (vdev_t *);
387 pvd->vdev_children = MAX(pvd->vdev_children, id + 1);
388 newsize = pvd->vdev_children * sizeof (vdev_t *);
390 newchild = kmem_alloc(newsize, KM_SLEEP);
391 if (pvd->vdev_child != NULL) {
392 bcopy(pvd->vdev_child, newchild, oldsize);
393 kmem_free(pvd->vdev_child, oldsize);
396 pvd->vdev_child = newchild;
397 pvd->vdev_child[id] = cvd;
399 cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd);
400 ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL);
403 * Walk up all ancestors to update guid sum.
405 for (; pvd != NULL; pvd = pvd->vdev_parent)
406 pvd->vdev_guid_sum += cvd->vdev_guid_sum;
408 if (cvd->vdev_ops->vdev_op_leaf) {
409 list_insert_head(&cvd->vdev_spa->spa_leaf_list, cvd);
410 cvd->vdev_spa->spa_leaf_list_gen++;
415 vdev_remove_child(vdev_t *pvd, vdev_t *cvd)
418 uint_t id = cvd->vdev_id;
420 ASSERT(cvd->vdev_parent == pvd);
425 ASSERT(id < pvd->vdev_children);
426 ASSERT(pvd->vdev_child[id] == cvd);
428 pvd->vdev_child[id] = NULL;
429 cvd->vdev_parent = NULL;
431 for (c = 0; c < pvd->vdev_children; c++)
432 if (pvd->vdev_child[c])
435 if (c == pvd->vdev_children) {
436 kmem_free(pvd->vdev_child, c * sizeof (vdev_t *));
437 pvd->vdev_child = NULL;
438 pvd->vdev_children = 0;
441 if (cvd->vdev_ops->vdev_op_leaf) {
442 spa_t *spa = cvd->vdev_spa;
443 list_remove(&spa->spa_leaf_list, cvd);
444 spa->spa_leaf_list_gen++;
448 * Walk up all ancestors to update guid sum.
450 for (; pvd != NULL; pvd = pvd->vdev_parent)
451 pvd->vdev_guid_sum -= cvd->vdev_guid_sum;
455 * Remove any holes in the child array.
458 vdev_compact_children(vdev_t *pvd)
460 vdev_t **newchild, *cvd;
461 int oldc = pvd->vdev_children;
464 ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL);
469 for (int c = newc = 0; c < oldc; c++)
470 if (pvd->vdev_child[c])
474 newchild = kmem_zalloc(newc * sizeof (vdev_t *), KM_SLEEP);
476 for (int c = newc = 0; c < oldc; c++) {
477 if ((cvd = pvd->vdev_child[c]) != NULL) {
478 newchild[newc] = cvd;
479 cvd->vdev_id = newc++;
486 kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *));
487 pvd->vdev_child = newchild;
488 pvd->vdev_children = newc;
492 * Allocate and minimally initialize a vdev_t.
495 vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops)
498 vdev_indirect_config_t *vic;
500 vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP);
501 vic = &vd->vdev_indirect_config;
503 if (spa->spa_root_vdev == NULL) {
504 ASSERT(ops == &vdev_root_ops);
505 spa->spa_root_vdev = vd;
506 spa->spa_load_guid = spa_generate_guid(NULL);
509 if (guid == 0 && ops != &vdev_hole_ops) {
510 if (spa->spa_root_vdev == vd) {
512 * The root vdev's guid will also be the pool guid,
513 * which must be unique among all pools.
515 guid = spa_generate_guid(NULL);
518 * Any other vdev's guid must be unique within the pool.
520 guid = spa_generate_guid(spa);
522 ASSERT(!spa_guid_exists(spa_guid(spa), guid));
527 vd->vdev_guid = guid;
528 vd->vdev_guid_sum = guid;
530 vd->vdev_state = VDEV_STATE_CLOSED;
531 vd->vdev_ishole = (ops == &vdev_hole_ops);
532 vic->vic_prev_indirect_vdev = UINT64_MAX;
534 rw_init(&vd->vdev_indirect_rwlock, NULL, RW_DEFAULT, NULL);
535 mutex_init(&vd->vdev_obsolete_lock, NULL, MUTEX_DEFAULT, NULL);
536 vd->vdev_obsolete_segments = range_tree_create(NULL, RANGE_SEG64, NULL,
540 * Initialize rate limit structs for events. We rate limit ZIO delay
541 * and checksum events so that we don't overwhelm ZED with thousands
542 * of events when a disk is acting up.
544 zfs_ratelimit_init(&vd->vdev_delay_rl, &zfs_slow_io_events_per_second,
546 zfs_ratelimit_init(&vd->vdev_checksum_rl,
547 &zfs_checksum_events_per_second, 1);
549 list_link_init(&vd->vdev_config_dirty_node);
550 list_link_init(&vd->vdev_state_dirty_node);
551 list_link_init(&vd->vdev_initialize_node);
552 list_link_init(&vd->vdev_leaf_node);
553 list_link_init(&vd->vdev_trim_node);
554 mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_NOLOCKDEP, NULL);
555 mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL);
556 mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL);
557 mutex_init(&vd->vdev_scan_io_queue_lock, NULL, MUTEX_DEFAULT, NULL);
559 mutex_init(&vd->vdev_initialize_lock, NULL, MUTEX_DEFAULT, NULL);
560 mutex_init(&vd->vdev_initialize_io_lock, NULL, MUTEX_DEFAULT, NULL);
561 cv_init(&vd->vdev_initialize_cv, NULL, CV_DEFAULT, NULL);
562 cv_init(&vd->vdev_initialize_io_cv, NULL, CV_DEFAULT, NULL);
564 mutex_init(&vd->vdev_trim_lock, NULL, MUTEX_DEFAULT, NULL);
565 mutex_init(&vd->vdev_autotrim_lock, NULL, MUTEX_DEFAULT, NULL);
566 mutex_init(&vd->vdev_trim_io_lock, NULL, MUTEX_DEFAULT, NULL);
567 cv_init(&vd->vdev_trim_cv, NULL, CV_DEFAULT, NULL);
568 cv_init(&vd->vdev_autotrim_cv, NULL, CV_DEFAULT, NULL);
569 cv_init(&vd->vdev_trim_io_cv, NULL, CV_DEFAULT, NULL);
571 mutex_init(&vd->vdev_rebuild_lock, NULL, MUTEX_DEFAULT, NULL);
572 mutex_init(&vd->vdev_rebuild_io_lock, NULL, MUTEX_DEFAULT, NULL);
573 cv_init(&vd->vdev_rebuild_cv, NULL, CV_DEFAULT, NULL);
574 cv_init(&vd->vdev_rebuild_io_cv, NULL, CV_DEFAULT, NULL);
576 for (int t = 0; t < DTL_TYPES; t++) {
577 vd->vdev_dtl[t] = range_tree_create(NULL, RANGE_SEG64, NULL, 0,
581 txg_list_create(&vd->vdev_ms_list, spa,
582 offsetof(struct metaslab, ms_txg_node));
583 txg_list_create(&vd->vdev_dtl_list, spa,
584 offsetof(struct vdev, vdev_dtl_node));
585 vd->vdev_stat.vs_timestamp = gethrtime();
593 * Allocate a new vdev. The 'alloctype' is used to control whether we are
594 * creating a new vdev or loading an existing one - the behavior is slightly
595 * different for each case.
598 vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id,
603 uint64_t guid = 0, islog, nparity;
605 vdev_indirect_config_t *vic;
608 vdev_alloc_bias_t alloc_bias = VDEV_BIAS_NONE;
609 boolean_t top_level = (parent && !parent->vdev_parent);
611 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
613 if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0)
614 return (SET_ERROR(EINVAL));
616 if ((ops = vdev_getops(type)) == NULL)
617 return (SET_ERROR(EINVAL));
620 * If this is a load, get the vdev guid from the nvlist.
621 * Otherwise, vdev_alloc_common() will generate one for us.
623 if (alloctype == VDEV_ALLOC_LOAD) {
626 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) ||
628 return (SET_ERROR(EINVAL));
630 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
631 return (SET_ERROR(EINVAL));
632 } else if (alloctype == VDEV_ALLOC_SPARE) {
633 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
634 return (SET_ERROR(EINVAL));
635 } else if (alloctype == VDEV_ALLOC_L2CACHE) {
636 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
637 return (SET_ERROR(EINVAL));
638 } else if (alloctype == VDEV_ALLOC_ROOTPOOL) {
639 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0)
640 return (SET_ERROR(EINVAL));
644 * The first allocated vdev must be of type 'root'.
646 if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL)
647 return (SET_ERROR(EINVAL));
650 * Determine whether we're a log vdev.
653 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog);
654 if (islog && spa_version(spa) < SPA_VERSION_SLOGS)
655 return (SET_ERROR(ENOTSUP));
657 if (ops == &vdev_hole_ops && spa_version(spa) < SPA_VERSION_HOLES)
658 return (SET_ERROR(ENOTSUP));
661 * Set the nparity property for RAID-Z vdevs.
664 if (ops == &vdev_raidz_ops) {
665 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY,
667 if (nparity == 0 || nparity > VDEV_RAIDZ_MAXPARITY)
668 return (SET_ERROR(EINVAL));
670 * Previous versions could only support 1 or 2 parity
674 spa_version(spa) < SPA_VERSION_RAIDZ2)
675 return (SET_ERROR(ENOTSUP));
677 spa_version(spa) < SPA_VERSION_RAIDZ3)
678 return (SET_ERROR(ENOTSUP));
681 * We require the parity to be specified for SPAs that
682 * support multiple parity levels.
684 if (spa_version(spa) >= SPA_VERSION_RAIDZ2)
685 return (SET_ERROR(EINVAL));
687 * Otherwise, we default to 1 parity device for RAID-Z.
694 ASSERT(nparity != -1ULL);
697 * If creating a top-level vdev, check for allocation classes input
699 if (top_level && alloctype == VDEV_ALLOC_ADD) {
702 if (nvlist_lookup_string(nv, ZPOOL_CONFIG_ALLOCATION_BIAS,
704 alloc_bias = vdev_derive_alloc_bias(bias);
706 /* spa_vdev_add() expects feature to be enabled */
707 if (spa->spa_load_state != SPA_LOAD_CREATE &&
708 !spa_feature_is_enabled(spa,
709 SPA_FEATURE_ALLOCATION_CLASSES)) {
710 return (SET_ERROR(ENOTSUP));
715 vd = vdev_alloc_common(spa, id, guid, ops);
716 vic = &vd->vdev_indirect_config;
718 vd->vdev_islog = islog;
719 vd->vdev_nparity = nparity;
720 if (top_level && alloc_bias != VDEV_BIAS_NONE)
721 vd->vdev_alloc_bias = alloc_bias;
723 if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0)
724 vd->vdev_path = spa_strdup(vd->vdev_path);
727 * ZPOOL_CONFIG_AUX_STATE = "external" means we previously forced a
728 * fault on a vdev and want it to persist across imports (like with
731 rc = nvlist_lookup_string(nv, ZPOOL_CONFIG_AUX_STATE, &tmp);
732 if (rc == 0 && tmp != NULL && strcmp(tmp, "external") == 0) {
733 vd->vdev_stat.vs_aux = VDEV_AUX_EXTERNAL;
734 vd->vdev_faulted = 1;
735 vd->vdev_label_aux = VDEV_AUX_EXTERNAL;
738 if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0)
739 vd->vdev_devid = spa_strdup(vd->vdev_devid);
740 if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH,
741 &vd->vdev_physpath) == 0)
742 vd->vdev_physpath = spa_strdup(vd->vdev_physpath);
744 if (nvlist_lookup_string(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH,
745 &vd->vdev_enc_sysfs_path) == 0)
746 vd->vdev_enc_sysfs_path = spa_strdup(vd->vdev_enc_sysfs_path);
748 if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0)
749 vd->vdev_fru = spa_strdup(vd->vdev_fru);
752 * Set the whole_disk property. If it's not specified, leave the value
755 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK,
756 &vd->vdev_wholedisk) != 0)
757 vd->vdev_wholedisk = -1ULL;
759 ASSERT0(vic->vic_mapping_object);
760 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_INDIRECT_OBJECT,
761 &vic->vic_mapping_object);
762 ASSERT0(vic->vic_births_object);
763 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_INDIRECT_BIRTHS,
764 &vic->vic_births_object);
765 ASSERT3U(vic->vic_prev_indirect_vdev, ==, UINT64_MAX);
766 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_PREV_INDIRECT_VDEV,
767 &vic->vic_prev_indirect_vdev);
770 * Look for the 'not present' flag. This will only be set if the device
771 * was not present at the time of import.
773 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT,
774 &vd->vdev_not_present);
777 * Get the alignment requirement.
779 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift);
782 * Retrieve the vdev creation time.
784 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_CREATE_TXG,
788 * If we're a top-level vdev, try to load the allocation parameters.
791 (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) {
792 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY,
794 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT,
796 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE,
798 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVING,
800 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_VDEV_TOP_ZAP,
803 ASSERT0(vd->vdev_top_zap);
806 if (top_level && alloctype != VDEV_ALLOC_ATTACH) {
807 ASSERT(alloctype == VDEV_ALLOC_LOAD ||
808 alloctype == VDEV_ALLOC_ADD ||
809 alloctype == VDEV_ALLOC_SPLIT ||
810 alloctype == VDEV_ALLOC_ROOTPOOL);
811 /* Note: metaslab_group_create() is now deferred */
814 if (vd->vdev_ops->vdev_op_leaf &&
815 (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) {
816 (void) nvlist_lookup_uint64(nv,
817 ZPOOL_CONFIG_VDEV_LEAF_ZAP, &vd->vdev_leaf_zap);
819 ASSERT0(vd->vdev_leaf_zap);
823 * If we're a leaf vdev, try to load the DTL object and other state.
826 if (vd->vdev_ops->vdev_op_leaf &&
827 (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE ||
828 alloctype == VDEV_ALLOC_ROOTPOOL)) {
829 if (alloctype == VDEV_ALLOC_LOAD) {
830 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL,
831 &vd->vdev_dtl_object);
832 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE,
836 if (alloctype == VDEV_ALLOC_ROOTPOOL) {
839 if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE,
840 &spare) == 0 && spare)
844 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE,
847 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_RESILVER_TXG,
848 &vd->vdev_resilver_txg);
850 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REBUILD_TXG,
851 &vd->vdev_rebuild_txg);
853 if (nvlist_exists(nv, ZPOOL_CONFIG_RESILVER_DEFER))
854 vdev_defer_resilver(vd);
857 * In general, when importing a pool we want to ignore the
858 * persistent fault state, as the diagnosis made on another
859 * system may not be valid in the current context. The only
860 * exception is if we forced a vdev to a persistently faulted
861 * state with 'zpool offline -f'. The persistent fault will
862 * remain across imports until cleared.
864 * Local vdevs will remain in the faulted state.
866 if (spa_load_state(spa) == SPA_LOAD_OPEN ||
867 spa_load_state(spa) == SPA_LOAD_IMPORT) {
868 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED,
870 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED,
872 (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED,
875 if (vd->vdev_faulted || vd->vdev_degraded) {
879 VDEV_AUX_ERR_EXCEEDED;
880 if (nvlist_lookup_string(nv,
881 ZPOOL_CONFIG_AUX_STATE, &aux) == 0 &&
882 strcmp(aux, "external") == 0)
883 vd->vdev_label_aux = VDEV_AUX_EXTERNAL;
885 vd->vdev_faulted = 0ULL;
891 * Add ourselves to the parent's list of children.
893 vdev_add_child(parent, vd);
901 vdev_free(vdev_t *vd)
903 spa_t *spa = vd->vdev_spa;
905 ASSERT3P(vd->vdev_initialize_thread, ==, NULL);
906 ASSERT3P(vd->vdev_trim_thread, ==, NULL);
907 ASSERT3P(vd->vdev_autotrim_thread, ==, NULL);
908 ASSERT3P(vd->vdev_rebuild_thread, ==, NULL);
911 * Scan queues are normally destroyed at the end of a scan. If the
912 * queue exists here, that implies the vdev is being removed while
913 * the scan is still running.
915 if (vd->vdev_scan_io_queue != NULL) {
916 mutex_enter(&vd->vdev_scan_io_queue_lock);
917 dsl_scan_io_queue_destroy(vd->vdev_scan_io_queue);
918 vd->vdev_scan_io_queue = NULL;
919 mutex_exit(&vd->vdev_scan_io_queue_lock);
923 * vdev_free() implies closing the vdev first. This is simpler than
924 * trying to ensure complicated semantics for all callers.
928 ASSERT(!list_link_active(&vd->vdev_config_dirty_node));
929 ASSERT(!list_link_active(&vd->vdev_state_dirty_node));
934 for (int c = 0; c < vd->vdev_children; c++)
935 vdev_free(vd->vdev_child[c]);
937 ASSERT(vd->vdev_child == NULL);
938 ASSERT(vd->vdev_guid_sum == vd->vdev_guid);
941 * Discard allocation state.
943 if (vd->vdev_mg != NULL) {
944 vdev_metaslab_fini(vd);
945 metaslab_group_destroy(vd->vdev_mg);
949 ASSERT0(vd->vdev_stat.vs_space);
950 ASSERT0(vd->vdev_stat.vs_dspace);
951 ASSERT0(vd->vdev_stat.vs_alloc);
954 * Remove this vdev from its parent's child list.
956 vdev_remove_child(vd->vdev_parent, vd);
958 ASSERT(vd->vdev_parent == NULL);
959 ASSERT(!list_link_active(&vd->vdev_leaf_node));
962 * Clean up vdev structure.
968 spa_strfree(vd->vdev_path);
970 spa_strfree(vd->vdev_devid);
971 if (vd->vdev_physpath)
972 spa_strfree(vd->vdev_physpath);
974 if (vd->vdev_enc_sysfs_path)
975 spa_strfree(vd->vdev_enc_sysfs_path);
978 spa_strfree(vd->vdev_fru);
980 if (vd->vdev_isspare)
981 spa_spare_remove(vd);
982 if (vd->vdev_isl2cache)
983 spa_l2cache_remove(vd);
985 txg_list_destroy(&vd->vdev_ms_list);
986 txg_list_destroy(&vd->vdev_dtl_list);
988 mutex_enter(&vd->vdev_dtl_lock);
989 space_map_close(vd->vdev_dtl_sm);
990 for (int t = 0; t < DTL_TYPES; t++) {
991 range_tree_vacate(vd->vdev_dtl[t], NULL, NULL);
992 range_tree_destroy(vd->vdev_dtl[t]);
994 mutex_exit(&vd->vdev_dtl_lock);
996 EQUIV(vd->vdev_indirect_births != NULL,
997 vd->vdev_indirect_mapping != NULL);
998 if (vd->vdev_indirect_births != NULL) {
999 vdev_indirect_mapping_close(vd->vdev_indirect_mapping);
1000 vdev_indirect_births_close(vd->vdev_indirect_births);
1003 if (vd->vdev_obsolete_sm != NULL) {
1004 ASSERT(vd->vdev_removing ||
1005 vd->vdev_ops == &vdev_indirect_ops);
1006 space_map_close(vd->vdev_obsolete_sm);
1007 vd->vdev_obsolete_sm = NULL;
1009 range_tree_destroy(vd->vdev_obsolete_segments);
1010 rw_destroy(&vd->vdev_indirect_rwlock);
1011 mutex_destroy(&vd->vdev_obsolete_lock);
1013 mutex_destroy(&vd->vdev_dtl_lock);
1014 mutex_destroy(&vd->vdev_stat_lock);
1015 mutex_destroy(&vd->vdev_probe_lock);
1016 mutex_destroy(&vd->vdev_scan_io_queue_lock);
1018 mutex_destroy(&vd->vdev_initialize_lock);
1019 mutex_destroy(&vd->vdev_initialize_io_lock);
1020 cv_destroy(&vd->vdev_initialize_io_cv);
1021 cv_destroy(&vd->vdev_initialize_cv);
1023 mutex_destroy(&vd->vdev_trim_lock);
1024 mutex_destroy(&vd->vdev_autotrim_lock);
1025 mutex_destroy(&vd->vdev_trim_io_lock);
1026 cv_destroy(&vd->vdev_trim_cv);
1027 cv_destroy(&vd->vdev_autotrim_cv);
1028 cv_destroy(&vd->vdev_trim_io_cv);
1030 mutex_destroy(&vd->vdev_rebuild_lock);
1031 mutex_destroy(&vd->vdev_rebuild_io_lock);
1032 cv_destroy(&vd->vdev_rebuild_cv);
1033 cv_destroy(&vd->vdev_rebuild_io_cv);
1035 zfs_ratelimit_fini(&vd->vdev_delay_rl);
1036 zfs_ratelimit_fini(&vd->vdev_checksum_rl);
1038 if (vd == spa->spa_root_vdev)
1039 spa->spa_root_vdev = NULL;
1041 kmem_free(vd, sizeof (vdev_t));
1045 * Transfer top-level vdev state from svd to tvd.
1048 vdev_top_transfer(vdev_t *svd, vdev_t *tvd)
1050 spa_t *spa = svd->vdev_spa;
1055 ASSERT(tvd == tvd->vdev_top);
1057 tvd->vdev_pending_fastwrite = svd->vdev_pending_fastwrite;
1058 tvd->vdev_ms_array = svd->vdev_ms_array;
1059 tvd->vdev_ms_shift = svd->vdev_ms_shift;
1060 tvd->vdev_ms_count = svd->vdev_ms_count;
1061 tvd->vdev_top_zap = svd->vdev_top_zap;
1063 svd->vdev_ms_array = 0;
1064 svd->vdev_ms_shift = 0;
1065 svd->vdev_ms_count = 0;
1066 svd->vdev_top_zap = 0;
1069 ASSERT3P(tvd->vdev_mg, ==, svd->vdev_mg);
1070 tvd->vdev_mg = svd->vdev_mg;
1071 tvd->vdev_ms = svd->vdev_ms;
1073 svd->vdev_mg = NULL;
1074 svd->vdev_ms = NULL;
1076 if (tvd->vdev_mg != NULL)
1077 tvd->vdev_mg->mg_vd = tvd;
1079 tvd->vdev_checkpoint_sm = svd->vdev_checkpoint_sm;
1080 svd->vdev_checkpoint_sm = NULL;
1082 tvd->vdev_alloc_bias = svd->vdev_alloc_bias;
1083 svd->vdev_alloc_bias = VDEV_BIAS_NONE;
1085 tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc;
1086 tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space;
1087 tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace;
1089 svd->vdev_stat.vs_alloc = 0;
1090 svd->vdev_stat.vs_space = 0;
1091 svd->vdev_stat.vs_dspace = 0;
1094 * State which may be set on a top-level vdev that's in the
1095 * process of being removed.
1097 ASSERT0(tvd->vdev_indirect_config.vic_births_object);
1098 ASSERT0(tvd->vdev_indirect_config.vic_mapping_object);
1099 ASSERT3U(tvd->vdev_indirect_config.vic_prev_indirect_vdev, ==, -1ULL);
1100 ASSERT3P(tvd->vdev_indirect_mapping, ==, NULL);
1101 ASSERT3P(tvd->vdev_indirect_births, ==, NULL);
1102 ASSERT3P(tvd->vdev_obsolete_sm, ==, NULL);
1103 ASSERT0(tvd->vdev_removing);
1104 ASSERT0(tvd->vdev_rebuilding);
1105 tvd->vdev_removing = svd->vdev_removing;
1106 tvd->vdev_rebuilding = svd->vdev_rebuilding;
1107 tvd->vdev_rebuild_config = svd->vdev_rebuild_config;
1108 tvd->vdev_indirect_config = svd->vdev_indirect_config;
1109 tvd->vdev_indirect_mapping = svd->vdev_indirect_mapping;
1110 tvd->vdev_indirect_births = svd->vdev_indirect_births;
1111 range_tree_swap(&svd->vdev_obsolete_segments,
1112 &tvd->vdev_obsolete_segments);
1113 tvd->vdev_obsolete_sm = svd->vdev_obsolete_sm;
1114 svd->vdev_indirect_config.vic_mapping_object = 0;
1115 svd->vdev_indirect_config.vic_births_object = 0;
1116 svd->vdev_indirect_config.vic_prev_indirect_vdev = -1ULL;
1117 svd->vdev_indirect_mapping = NULL;
1118 svd->vdev_indirect_births = NULL;
1119 svd->vdev_obsolete_sm = NULL;
1120 svd->vdev_removing = 0;
1121 svd->vdev_rebuilding = 0;
1123 for (t = 0; t < TXG_SIZE; t++) {
1124 while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL)
1125 (void) txg_list_add(&tvd->vdev_ms_list, msp, t);
1126 while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL)
1127 (void) txg_list_add(&tvd->vdev_dtl_list, vd, t);
1128 if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t))
1129 (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t);
1132 if (list_link_active(&svd->vdev_config_dirty_node)) {
1133 vdev_config_clean(svd);
1134 vdev_config_dirty(tvd);
1137 if (list_link_active(&svd->vdev_state_dirty_node)) {
1138 vdev_state_clean(svd);
1139 vdev_state_dirty(tvd);
1142 tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio;
1143 svd->vdev_deflate_ratio = 0;
1145 tvd->vdev_islog = svd->vdev_islog;
1146 svd->vdev_islog = 0;
1148 dsl_scan_io_queue_vdev_xfer(svd, tvd);
1152 vdev_top_update(vdev_t *tvd, vdev_t *vd)
1159 for (int c = 0; c < vd->vdev_children; c++)
1160 vdev_top_update(tvd, vd->vdev_child[c]);
1164 * Add a mirror/replacing vdev above an existing vdev.
1167 vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops)
1169 spa_t *spa = cvd->vdev_spa;
1170 vdev_t *pvd = cvd->vdev_parent;
1173 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1175 mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops);
1177 mvd->vdev_asize = cvd->vdev_asize;
1178 mvd->vdev_min_asize = cvd->vdev_min_asize;
1179 mvd->vdev_max_asize = cvd->vdev_max_asize;
1180 mvd->vdev_psize = cvd->vdev_psize;
1181 mvd->vdev_ashift = cvd->vdev_ashift;
1182 mvd->vdev_logical_ashift = cvd->vdev_logical_ashift;
1183 mvd->vdev_physical_ashift = cvd->vdev_physical_ashift;
1184 mvd->vdev_state = cvd->vdev_state;
1185 mvd->vdev_crtxg = cvd->vdev_crtxg;
1187 vdev_remove_child(pvd, cvd);
1188 vdev_add_child(pvd, mvd);
1189 cvd->vdev_id = mvd->vdev_children;
1190 vdev_add_child(mvd, cvd);
1191 vdev_top_update(cvd->vdev_top, cvd->vdev_top);
1193 if (mvd == mvd->vdev_top)
1194 vdev_top_transfer(cvd, mvd);
1200 * Remove a 1-way mirror/replacing vdev from the tree.
1203 vdev_remove_parent(vdev_t *cvd)
1205 vdev_t *mvd = cvd->vdev_parent;
1206 vdev_t *pvd = mvd->vdev_parent;
1208 ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1210 ASSERT(mvd->vdev_children == 1);
1211 ASSERT(mvd->vdev_ops == &vdev_mirror_ops ||
1212 mvd->vdev_ops == &vdev_replacing_ops ||
1213 mvd->vdev_ops == &vdev_spare_ops);
1214 cvd->vdev_ashift = mvd->vdev_ashift;
1215 cvd->vdev_logical_ashift = mvd->vdev_logical_ashift;
1216 cvd->vdev_physical_ashift = mvd->vdev_physical_ashift;
1217 vdev_remove_child(mvd, cvd);
1218 vdev_remove_child(pvd, mvd);
1221 * If cvd will replace mvd as a top-level vdev, preserve mvd's guid.
1222 * Otherwise, we could have detached an offline device, and when we
1223 * go to import the pool we'll think we have two top-level vdevs,
1224 * instead of a different version of the same top-level vdev.
1226 if (mvd->vdev_top == mvd) {
1227 uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid;
1228 cvd->vdev_orig_guid = cvd->vdev_guid;
1229 cvd->vdev_guid += guid_delta;
1230 cvd->vdev_guid_sum += guid_delta;
1233 * If pool not set for autoexpand, we need to also preserve
1234 * mvd's asize to prevent automatic expansion of cvd.
1235 * Otherwise if we are adjusting the mirror by attaching and
1236 * detaching children of non-uniform sizes, the mirror could
1237 * autoexpand, unexpectedly requiring larger devices to
1238 * re-establish the mirror.
1240 if (!cvd->vdev_spa->spa_autoexpand)
1241 cvd->vdev_asize = mvd->vdev_asize;
1243 cvd->vdev_id = mvd->vdev_id;
1244 vdev_add_child(pvd, cvd);
1245 vdev_top_update(cvd->vdev_top, cvd->vdev_top);
1247 if (cvd == cvd->vdev_top)
1248 vdev_top_transfer(mvd, cvd);
1250 ASSERT(mvd->vdev_children == 0);
1255 vdev_metaslab_group_create(vdev_t *vd)
1257 spa_t *spa = vd->vdev_spa;
1260 * metaslab_group_create was delayed until allocation bias was available
1262 if (vd->vdev_mg == NULL) {
1263 metaslab_class_t *mc;
1265 if (vd->vdev_islog && vd->vdev_alloc_bias == VDEV_BIAS_NONE)
1266 vd->vdev_alloc_bias = VDEV_BIAS_LOG;
1268 ASSERT3U(vd->vdev_islog, ==,
1269 (vd->vdev_alloc_bias == VDEV_BIAS_LOG));
1271 switch (vd->vdev_alloc_bias) {
1273 mc = spa_log_class(spa);
1275 case VDEV_BIAS_SPECIAL:
1276 mc = spa_special_class(spa);
1278 case VDEV_BIAS_DEDUP:
1279 mc = spa_dedup_class(spa);
1282 mc = spa_normal_class(spa);
1285 vd->vdev_mg = metaslab_group_create(mc, vd,
1286 spa->spa_alloc_count);
1289 * The spa ashift min/max only apply for the normal metaslab
1290 * class. Class destination is late binding so ashift boundry
1291 * setting had to wait until now.
1293 if (vd->vdev_top == vd && vd->vdev_ashift != 0 &&
1294 mc == spa_normal_class(spa) && vd->vdev_aux == NULL) {
1295 if (vd->vdev_ashift > spa->spa_max_ashift)
1296 spa->spa_max_ashift = vd->vdev_ashift;
1297 if (vd->vdev_ashift < spa->spa_min_ashift)
1298 spa->spa_min_ashift = vd->vdev_ashift;
1304 vdev_metaslab_init(vdev_t *vd, uint64_t txg)
1306 spa_t *spa = vd->vdev_spa;
1307 objset_t *mos = spa->spa_meta_objset;
1309 uint64_t oldc = vd->vdev_ms_count;
1310 uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift;
1313 boolean_t expanding = (oldc != 0);
1315 ASSERT(txg == 0 || spa_config_held(spa, SCL_ALLOC, RW_WRITER));
1318 * This vdev is not being allocated from yet or is a hole.
1320 if (vd->vdev_ms_shift == 0)
1323 ASSERT(!vd->vdev_ishole);
1325 ASSERT(oldc <= newc);
1327 mspp = vmem_zalloc(newc * sizeof (*mspp), KM_SLEEP);
1330 bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp));
1331 vmem_free(vd->vdev_ms, oldc * sizeof (*mspp));
1335 vd->vdev_ms_count = newc;
1336 for (m = oldc; m < newc; m++) {
1337 uint64_t object = 0;
1340 * vdev_ms_array may be 0 if we are creating the "fake"
1341 * metaslabs for an indirect vdev for zdb's leak detection.
1342 * See zdb_leak_init().
1344 if (txg == 0 && vd->vdev_ms_array != 0) {
1345 error = dmu_read(mos, vd->vdev_ms_array,
1346 m * sizeof (uint64_t), sizeof (uint64_t), &object,
1349 vdev_dbgmsg(vd, "unable to read the metaslab "
1350 "array [error=%d]", error);
1357 * To accommodate zdb_leak_init() fake indirect
1358 * metaslabs, we allocate a metaslab group for
1359 * indirect vdevs which normally don't have one.
1361 if (vd->vdev_mg == NULL) {
1362 ASSERT0(vdev_is_concrete(vd));
1363 vdev_metaslab_group_create(vd);
1366 error = metaslab_init(vd->vdev_mg, m, object, txg,
1369 vdev_dbgmsg(vd, "metaslab_init failed [error=%d]",
1376 spa_config_enter(spa, SCL_ALLOC, FTAG, RW_WRITER);
1379 * If the vdev is being removed we don't activate
1380 * the metaslabs since we want to ensure that no new
1381 * allocations are performed on this device.
1383 if (!expanding && !vd->vdev_removing) {
1384 metaslab_group_activate(vd->vdev_mg);
1388 spa_config_exit(spa, SCL_ALLOC, FTAG);
1391 * Regardless whether this vdev was just added or it is being
1392 * expanded, the metaslab count has changed. Recalculate the
1395 spa_log_sm_set_blocklimit(spa);
1401 vdev_metaslab_fini(vdev_t *vd)
1403 if (vd->vdev_checkpoint_sm != NULL) {
1404 ASSERT(spa_feature_is_active(vd->vdev_spa,
1405 SPA_FEATURE_POOL_CHECKPOINT));
1406 space_map_close(vd->vdev_checkpoint_sm);
1408 * Even though we close the space map, we need to set its
1409 * pointer to NULL. The reason is that vdev_metaslab_fini()
1410 * may be called multiple times for certain operations
1411 * (i.e. when destroying a pool) so we need to ensure that
1412 * this clause never executes twice. This logic is similar
1413 * to the one used for the vdev_ms clause below.
1415 vd->vdev_checkpoint_sm = NULL;
1418 if (vd->vdev_ms != NULL) {
1419 metaslab_group_t *mg = vd->vdev_mg;
1420 metaslab_group_passivate(mg);
1422 uint64_t count = vd->vdev_ms_count;
1423 for (uint64_t m = 0; m < count; m++) {
1424 metaslab_t *msp = vd->vdev_ms[m];
1428 vmem_free(vd->vdev_ms, count * sizeof (metaslab_t *));
1431 vd->vdev_ms_count = 0;
1433 for (int i = 0; i < RANGE_TREE_HISTOGRAM_SIZE; i++)
1434 ASSERT0(mg->mg_histogram[i]);
1436 ASSERT0(vd->vdev_ms_count);
1437 ASSERT3U(vd->vdev_pending_fastwrite, ==, 0);
1440 typedef struct vdev_probe_stats {
1441 boolean_t vps_readable;
1442 boolean_t vps_writeable;
1444 } vdev_probe_stats_t;
1447 vdev_probe_done(zio_t *zio)
1449 spa_t *spa = zio->io_spa;
1450 vdev_t *vd = zio->io_vd;
1451 vdev_probe_stats_t *vps = zio->io_private;
1453 ASSERT(vd->vdev_probe_zio != NULL);
1455 if (zio->io_type == ZIO_TYPE_READ) {
1456 if (zio->io_error == 0)
1457 vps->vps_readable = 1;
1458 if (zio->io_error == 0 && spa_writeable(spa)) {
1459 zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd,
1460 zio->io_offset, zio->io_size, zio->io_abd,
1461 ZIO_CHECKSUM_OFF, vdev_probe_done, vps,
1462 ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE));
1464 abd_free(zio->io_abd);
1466 } else if (zio->io_type == ZIO_TYPE_WRITE) {
1467 if (zio->io_error == 0)
1468 vps->vps_writeable = 1;
1469 abd_free(zio->io_abd);
1470 } else if (zio->io_type == ZIO_TYPE_NULL) {
1474 vd->vdev_cant_read |= !vps->vps_readable;
1475 vd->vdev_cant_write |= !vps->vps_writeable;
1477 if (vdev_readable(vd) &&
1478 (vdev_writeable(vd) || !spa_writeable(spa))) {
1481 ASSERT(zio->io_error != 0);
1482 vdev_dbgmsg(vd, "failed probe");
1483 (void) zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE,
1484 spa, vd, NULL, NULL, 0);
1485 zio->io_error = SET_ERROR(ENXIO);
1488 mutex_enter(&vd->vdev_probe_lock);
1489 ASSERT(vd->vdev_probe_zio == zio);
1490 vd->vdev_probe_zio = NULL;
1491 mutex_exit(&vd->vdev_probe_lock);
1494 while ((pio = zio_walk_parents(zio, &zl)) != NULL)
1495 if (!vdev_accessible(vd, pio))
1496 pio->io_error = SET_ERROR(ENXIO);
1498 kmem_free(vps, sizeof (*vps));
1503 * Determine whether this device is accessible.
1505 * Read and write to several known locations: the pad regions of each
1506 * vdev label but the first, which we leave alone in case it contains
1510 vdev_probe(vdev_t *vd, zio_t *zio)
1512 spa_t *spa = vd->vdev_spa;
1513 vdev_probe_stats_t *vps = NULL;
1516 ASSERT(vd->vdev_ops->vdev_op_leaf);
1519 * Don't probe the probe.
1521 if (zio && (zio->io_flags & ZIO_FLAG_PROBE))
1525 * To prevent 'probe storms' when a device fails, we create
1526 * just one probe i/o at a time. All zios that want to probe
1527 * this vdev will become parents of the probe io.
1529 mutex_enter(&vd->vdev_probe_lock);
1531 if ((pio = vd->vdev_probe_zio) == NULL) {
1532 vps = kmem_zalloc(sizeof (*vps), KM_SLEEP);
1534 vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE |
1535 ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE |
1538 if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) {
1540 * vdev_cant_read and vdev_cant_write can only
1541 * transition from TRUE to FALSE when we have the
1542 * SCL_ZIO lock as writer; otherwise they can only
1543 * transition from FALSE to TRUE. This ensures that
1544 * any zio looking at these values can assume that
1545 * failures persist for the life of the I/O. That's
1546 * important because when a device has intermittent
1547 * connectivity problems, we want to ensure that
1548 * they're ascribed to the device (ENXIO) and not
1551 * Since we hold SCL_ZIO as writer here, clear both
1552 * values so the probe can reevaluate from first
1555 vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER;
1556 vd->vdev_cant_read = B_FALSE;
1557 vd->vdev_cant_write = B_FALSE;
1560 vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd,
1561 vdev_probe_done, vps,
1562 vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE);
1565 * We can't change the vdev state in this context, so we
1566 * kick off an async task to do it on our behalf.
1569 vd->vdev_probe_wanted = B_TRUE;
1570 spa_async_request(spa, SPA_ASYNC_PROBE);
1575 zio_add_child(zio, pio);
1577 mutex_exit(&vd->vdev_probe_lock);
1580 ASSERT(zio != NULL);
1584 for (int l = 1; l < VDEV_LABELS; l++) {
1585 zio_nowait(zio_read_phys(pio, vd,
1586 vdev_label_offset(vd->vdev_psize, l,
1587 offsetof(vdev_label_t, vl_be)), VDEV_PAD_SIZE,
1588 abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE),
1589 ZIO_CHECKSUM_OFF, vdev_probe_done, vps,
1590 ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE));
1601 vdev_open_child(void *arg)
1605 vd->vdev_open_thread = curthread;
1606 vd->vdev_open_error = vdev_open(vd);
1607 vd->vdev_open_thread = NULL;
1611 vdev_uses_zvols(vdev_t *vd)
1614 if (zvol_is_zvol(vd->vdev_path))
1618 for (int c = 0; c < vd->vdev_children; c++)
1619 if (vdev_uses_zvols(vd->vdev_child[c]))
1626 vdev_open_children(vdev_t *vd)
1629 int children = vd->vdev_children;
1632 * in order to handle pools on top of zvols, do the opens
1633 * in a single thread so that the same thread holds the
1634 * spa_namespace_lock
1636 if (vdev_uses_zvols(vd)) {
1638 for (int c = 0; c < children; c++)
1639 vd->vdev_child[c]->vdev_open_error =
1640 vdev_open(vd->vdev_child[c]);
1642 tq = taskq_create("vdev_open", children, minclsyspri,
1643 children, children, TASKQ_PREPOPULATE);
1647 for (int c = 0; c < children; c++)
1648 VERIFY(taskq_dispatch(tq, vdev_open_child,
1649 vd->vdev_child[c], TQ_SLEEP) != TASKQID_INVALID);
1654 vd->vdev_nonrot = B_TRUE;
1656 for (int c = 0; c < children; c++)
1657 vd->vdev_nonrot &= vd->vdev_child[c]->vdev_nonrot;
1661 * Compute the raidz-deflation ratio. Note, we hard-code
1662 * in 128k (1 << 17) because it is the "typical" blocksize.
1663 * Even though SPA_MAXBLOCKSIZE changed, this algorithm can not change,
1664 * otherwise it would inconsistently account for existing bp's.
1667 vdev_set_deflate_ratio(vdev_t *vd)
1669 if (vd == vd->vdev_top && !vd->vdev_ishole && vd->vdev_ashift != 0) {
1670 vd->vdev_deflate_ratio = (1 << 17) /
1671 (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT);
1676 * Maximize performance by inflating the configured ashift for top level
1677 * vdevs to be as close to the physical ashift as possible while maintaining
1678 * administrator defined limits and ensuring it doesn't go below the
1682 vdev_ashift_optimize(vdev_t *vd)
1684 ASSERT(vd == vd->vdev_top);
1686 if (vd->vdev_ashift < vd->vdev_physical_ashift) {
1687 vd->vdev_ashift = MIN(
1688 MAX(zfs_vdev_max_auto_ashift, vd->vdev_ashift),
1689 MAX(zfs_vdev_min_auto_ashift,
1690 vd->vdev_physical_ashift));
1693 * If the logical and physical ashifts are the same, then
1694 * we ensure that the top-level vdev's ashift is not smaller
1695 * than our minimum ashift value. For the unusual case
1696 * where logical ashift > physical ashift, we can't cap
1697 * the calculated ashift based on max ashift as that
1698 * would cause failures.
1699 * We still check if we need to increase it to match
1702 vd->vdev_ashift = MAX(zfs_vdev_min_auto_ashift,
1708 * Prepare a virtual device for access.
1711 vdev_open(vdev_t *vd)
1713 spa_t *spa = vd->vdev_spa;
1716 uint64_t max_osize = 0;
1717 uint64_t asize, max_asize, psize;
1718 uint64_t logical_ashift = 0;
1719 uint64_t physical_ashift = 0;
1721 ASSERT(vd->vdev_open_thread == curthread ||
1722 spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
1723 ASSERT(vd->vdev_state == VDEV_STATE_CLOSED ||
1724 vd->vdev_state == VDEV_STATE_CANT_OPEN ||
1725 vd->vdev_state == VDEV_STATE_OFFLINE);
1727 vd->vdev_stat.vs_aux = VDEV_AUX_NONE;
1728 vd->vdev_cant_read = B_FALSE;
1729 vd->vdev_cant_write = B_FALSE;
1730 vd->vdev_min_asize = vdev_get_min_asize(vd);
1733 * If this vdev is not removed, check its fault status. If it's
1734 * faulted, bail out of the open.
1736 if (!vd->vdev_removed && vd->vdev_faulted) {
1737 ASSERT(vd->vdev_children == 0);
1738 ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED ||
1739 vd->vdev_label_aux == VDEV_AUX_EXTERNAL);
1740 vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED,
1741 vd->vdev_label_aux);
1742 return (SET_ERROR(ENXIO));
1743 } else if (vd->vdev_offline) {
1744 ASSERT(vd->vdev_children == 0);
1745 vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE);
1746 return (SET_ERROR(ENXIO));
1749 error = vd->vdev_ops->vdev_op_open(vd, &osize, &max_osize,
1750 &logical_ashift, &physical_ashift);
1752 * Physical volume size should never be larger than its max size, unless
1753 * the disk has shrunk while we were reading it or the device is buggy
1754 * or damaged: either way it's not safe for use, bail out of the open.
1756 if (osize > max_osize) {
1757 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
1758 VDEV_AUX_OPEN_FAILED);
1759 return (SET_ERROR(ENXIO));
1763 * Reset the vdev_reopening flag so that we actually close
1764 * the vdev on error.
1766 vd->vdev_reopening = B_FALSE;
1767 if (zio_injection_enabled && error == 0)
1768 error = zio_handle_device_injection(vd, NULL, SET_ERROR(ENXIO));
1771 if (vd->vdev_removed &&
1772 vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED)
1773 vd->vdev_removed = B_FALSE;
1775 if (vd->vdev_stat.vs_aux == VDEV_AUX_CHILDREN_OFFLINE) {
1776 vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE,
1777 vd->vdev_stat.vs_aux);
1779 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
1780 vd->vdev_stat.vs_aux);
1785 vd->vdev_removed = B_FALSE;
1788 * Recheck the faulted flag now that we have confirmed that
1789 * the vdev is accessible. If we're faulted, bail.
1791 if (vd->vdev_faulted) {
1792 ASSERT(vd->vdev_children == 0);
1793 ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED ||
1794 vd->vdev_label_aux == VDEV_AUX_EXTERNAL);
1795 vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED,
1796 vd->vdev_label_aux);
1797 return (SET_ERROR(ENXIO));
1800 if (vd->vdev_degraded) {
1801 ASSERT(vd->vdev_children == 0);
1802 vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED,
1803 VDEV_AUX_ERR_EXCEEDED);
1805 vdev_set_state(vd, B_TRUE, VDEV_STATE_HEALTHY, 0);
1809 * For hole or missing vdevs we just return success.
1811 if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops)
1814 for (int c = 0; c < vd->vdev_children; c++) {
1815 if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) {
1816 vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED,
1822 osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t));
1823 max_osize = P2ALIGN(max_osize, (uint64_t)sizeof (vdev_label_t));
1825 if (vd->vdev_children == 0) {
1826 if (osize < SPA_MINDEVSIZE) {
1827 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
1828 VDEV_AUX_TOO_SMALL);
1829 return (SET_ERROR(EOVERFLOW));
1832 asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE);
1833 max_asize = max_osize - (VDEV_LABEL_START_SIZE +
1834 VDEV_LABEL_END_SIZE);
1836 if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE -
1837 (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) {
1838 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
1839 VDEV_AUX_TOO_SMALL);
1840 return (SET_ERROR(EOVERFLOW));
1844 max_asize = max_osize;
1848 * If the vdev was expanded, record this so that we can re-create the
1849 * uberblock rings in labels {2,3}, during the next sync.
1851 if ((psize > vd->vdev_psize) && (vd->vdev_psize != 0))
1852 vd->vdev_copy_uberblocks = B_TRUE;
1854 vd->vdev_psize = psize;
1857 * Make sure the allocatable size hasn't shrunk too much.
1859 if (asize < vd->vdev_min_asize) {
1860 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
1861 VDEV_AUX_BAD_LABEL);
1862 return (SET_ERROR(EINVAL));
1866 * We can always set the logical/physical ashift members since
1867 * their values are only used to calculate the vdev_ashift when
1868 * the device is first added to the config. These values should
1869 * not be used for anything else since they may change whenever
1870 * the device is reopened and we don't store them in the label.
1872 vd->vdev_physical_ashift =
1873 MAX(physical_ashift, vd->vdev_physical_ashift);
1874 vd->vdev_logical_ashift = MAX(logical_ashift,
1875 vd->vdev_logical_ashift);
1877 if (vd->vdev_asize == 0) {
1879 * This is the first-ever open, so use the computed values.
1880 * For compatibility, a different ashift can be requested.
1882 vd->vdev_asize = asize;
1883 vd->vdev_max_asize = max_asize;
1886 * If the vdev_ashift was not overriden at creation time,
1887 * then set it the logical ashift and optimize the ashift.
1889 if (vd->vdev_ashift == 0) {
1890 vd->vdev_ashift = vd->vdev_logical_ashift;
1892 if (vd->vdev_logical_ashift > ASHIFT_MAX) {
1893 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
1894 VDEV_AUX_ASHIFT_TOO_BIG);
1895 return (SET_ERROR(EDOM));
1898 if (vd->vdev_top == vd) {
1899 vdev_ashift_optimize(vd);
1902 if (vd->vdev_ashift != 0 && (vd->vdev_ashift < ASHIFT_MIN ||
1903 vd->vdev_ashift > ASHIFT_MAX)) {
1904 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
1905 VDEV_AUX_BAD_ASHIFT);
1906 return (SET_ERROR(EDOM));
1910 * Make sure the alignment required hasn't increased.
1912 if (vd->vdev_ashift > vd->vdev_top->vdev_ashift &&
1913 vd->vdev_ops->vdev_op_leaf) {
1914 (void) zfs_ereport_post(
1915 FM_EREPORT_ZFS_DEVICE_BAD_ASHIFT,
1916 spa, vd, NULL, NULL, 0);
1917 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
1918 VDEV_AUX_BAD_LABEL);
1919 return (SET_ERROR(EDOM));
1921 vd->vdev_max_asize = max_asize;
1925 * If all children are healthy we update asize if either:
1926 * The asize has increased, due to a device expansion caused by dynamic
1927 * LUN growth or vdev replacement, and automatic expansion is enabled;
1928 * making the additional space available.
1930 * The asize has decreased, due to a device shrink usually caused by a
1931 * vdev replace with a smaller device. This ensures that calculations
1932 * based of max_asize and asize e.g. esize are always valid. It's safe
1933 * to do this as we've already validated that asize is greater than
1936 if (vd->vdev_state == VDEV_STATE_HEALTHY &&
1937 ((asize > vd->vdev_asize &&
1938 (vd->vdev_expanding || spa->spa_autoexpand)) ||
1939 (asize < vd->vdev_asize)))
1940 vd->vdev_asize = asize;
1942 vdev_set_min_asize(vd);
1945 * Ensure we can issue some IO before declaring the
1946 * vdev open for business.
1948 if (vd->vdev_ops->vdev_op_leaf &&
1949 (error = zio_wait(vdev_probe(vd, NULL))) != 0) {
1950 vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED,
1951 VDEV_AUX_ERR_EXCEEDED);
1956 * If this is a leaf vdev, assess whether a resilver is needed.
1957 * But don't do this if we are doing a reopen for a scrub, since
1958 * this would just restart the scrub we are already doing.
1960 if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen)
1961 dsl_scan_assess_vdev(spa->spa_dsl_pool, vd);
1967 * Called once the vdevs are all opened, this routine validates the label
1968 * contents. This needs to be done before vdev_load() so that we don't
1969 * inadvertently do repair I/Os to the wrong device.
1971 * This function will only return failure if one of the vdevs indicates that it
1972 * has since been destroyed or exported. This is only possible if
1973 * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state
1974 * will be updated but the function will return 0.
1977 vdev_validate(vdev_t *vd)
1979 spa_t *spa = vd->vdev_spa;
1981 uint64_t guid = 0, aux_guid = 0, top_guid;
1986 if (vdev_validate_skip)
1989 for (uint64_t c = 0; c < vd->vdev_children; c++)
1990 if (vdev_validate(vd->vdev_child[c]) != 0)
1991 return (SET_ERROR(EBADF));
1994 * If the device has already failed, or was marked offline, don't do
1995 * any further validation. Otherwise, label I/O will fail and we will
1996 * overwrite the previous state.
1998 if (!vd->vdev_ops->vdev_op_leaf || !vdev_readable(vd))
2002 * If we are performing an extreme rewind, we allow for a label that
2003 * was modified at a point after the current txg.
2004 * If config lock is not held do not check for the txg. spa_sync could
2005 * be updating the vdev's label before updating spa_last_synced_txg.
2007 if (spa->spa_extreme_rewind || spa_last_synced_txg(spa) == 0 ||
2008 spa_config_held(spa, SCL_CONFIG, RW_WRITER) != SCL_CONFIG)
2011 txg = spa_last_synced_txg(spa);
2013 if ((label = vdev_label_read_config(vd, txg)) == NULL) {
2014 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
2015 VDEV_AUX_BAD_LABEL);
2016 vdev_dbgmsg(vd, "vdev_validate: failed reading config for "
2017 "txg %llu", (u_longlong_t)txg);
2022 * Determine if this vdev has been split off into another
2023 * pool. If so, then refuse to open it.
2025 if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_SPLIT_GUID,
2026 &aux_guid) == 0 && aux_guid == spa_guid(spa)) {
2027 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
2028 VDEV_AUX_SPLIT_POOL);
2030 vdev_dbgmsg(vd, "vdev_validate: vdev split into other pool");
2034 if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, &guid) != 0) {
2035 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
2036 VDEV_AUX_CORRUPT_DATA);
2038 vdev_dbgmsg(vd, "vdev_validate: '%s' missing from label",
2039 ZPOOL_CONFIG_POOL_GUID);
2044 * If config is not trusted then ignore the spa guid check. This is
2045 * necessary because if the machine crashed during a re-guid the new
2046 * guid might have been written to all of the vdev labels, but not the
2047 * cached config. The check will be performed again once we have the
2048 * trusted config from the MOS.
2050 if (spa->spa_trust_config && guid != spa_guid(spa)) {
2051 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
2052 VDEV_AUX_CORRUPT_DATA);
2054 vdev_dbgmsg(vd, "vdev_validate: vdev label pool_guid doesn't "
2055 "match config (%llu != %llu)", (u_longlong_t)guid,
2056 (u_longlong_t)spa_guid(spa));
2060 if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvl)
2061 != 0 || nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_ORIG_GUID,
2065 if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0) {
2066 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
2067 VDEV_AUX_CORRUPT_DATA);
2069 vdev_dbgmsg(vd, "vdev_validate: '%s' missing from label",
2074 if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, &top_guid)
2076 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
2077 VDEV_AUX_CORRUPT_DATA);
2079 vdev_dbgmsg(vd, "vdev_validate: '%s' missing from label",
2080 ZPOOL_CONFIG_TOP_GUID);
2085 * If this vdev just became a top-level vdev because its sibling was
2086 * detached, it will have adopted the parent's vdev guid -- but the
2087 * label may or may not be on disk yet. Fortunately, either version
2088 * of the label will have the same top guid, so if we're a top-level
2089 * vdev, we can safely compare to that instead.
2090 * However, if the config comes from a cachefile that failed to update
2091 * after the detach, a top-level vdev will appear as a non top-level
2092 * vdev in the config. Also relax the constraints if we perform an
2095 * If we split this vdev off instead, then we also check the
2096 * original pool's guid. We don't want to consider the vdev
2097 * corrupt if it is partway through a split operation.
2099 if (vd->vdev_guid != guid && vd->vdev_guid != aux_guid) {
2100 boolean_t mismatch = B_FALSE;
2101 if (spa->spa_trust_config && !spa->spa_extreme_rewind) {
2102 if (vd != vd->vdev_top || vd->vdev_guid != top_guid)
2105 if (vd->vdev_guid != top_guid &&
2106 vd->vdev_top->vdev_guid != guid)
2111 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
2112 VDEV_AUX_CORRUPT_DATA);
2114 vdev_dbgmsg(vd, "vdev_validate: config guid "
2115 "doesn't match label guid");
2116 vdev_dbgmsg(vd, "CONFIG: guid %llu, top_guid %llu",
2117 (u_longlong_t)vd->vdev_guid,
2118 (u_longlong_t)vd->vdev_top->vdev_guid);
2119 vdev_dbgmsg(vd, "LABEL: guid %llu, top_guid %llu, "
2120 "aux_guid %llu", (u_longlong_t)guid,
2121 (u_longlong_t)top_guid, (u_longlong_t)aux_guid);
2126 if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE,
2128 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
2129 VDEV_AUX_CORRUPT_DATA);
2131 vdev_dbgmsg(vd, "vdev_validate: '%s' missing from label",
2132 ZPOOL_CONFIG_POOL_STATE);
2139 * If this is a verbatim import, no need to check the
2140 * state of the pool.
2142 if (!(spa->spa_import_flags & ZFS_IMPORT_VERBATIM) &&
2143 spa_load_state(spa) == SPA_LOAD_OPEN &&
2144 state != POOL_STATE_ACTIVE) {
2145 vdev_dbgmsg(vd, "vdev_validate: invalid pool state (%llu) "
2146 "for spa %s", (u_longlong_t)state, spa->spa_name);
2147 return (SET_ERROR(EBADF));
2151 * If we were able to open and validate a vdev that was
2152 * previously marked permanently unavailable, clear that state
2155 if (vd->vdev_not_present)
2156 vd->vdev_not_present = 0;
2162 vdev_copy_path_impl(vdev_t *svd, vdev_t *dvd)
2164 if (svd->vdev_path != NULL && dvd->vdev_path != NULL) {
2165 if (strcmp(svd->vdev_path, dvd->vdev_path) != 0) {
2166 zfs_dbgmsg("vdev_copy_path: vdev %llu: path changed "
2167 "from '%s' to '%s'", (u_longlong_t)dvd->vdev_guid,
2168 dvd->vdev_path, svd->vdev_path);
2169 spa_strfree(dvd->vdev_path);
2170 dvd->vdev_path = spa_strdup(svd->vdev_path);
2172 } else if (svd->vdev_path != NULL) {
2173 dvd->vdev_path = spa_strdup(svd->vdev_path);
2174 zfs_dbgmsg("vdev_copy_path: vdev %llu: path set to '%s'",
2175 (u_longlong_t)dvd->vdev_guid, dvd->vdev_path);
2180 * Recursively copy vdev paths from one vdev to another. Source and destination
2181 * vdev trees must have same geometry otherwise return error. Intended to copy
2182 * paths from userland config into MOS config.
2185 vdev_copy_path_strict(vdev_t *svd, vdev_t *dvd)
2187 if ((svd->vdev_ops == &vdev_missing_ops) ||
2188 (svd->vdev_ishole && dvd->vdev_ishole) ||
2189 (dvd->vdev_ops == &vdev_indirect_ops))
2192 if (svd->vdev_ops != dvd->vdev_ops) {
2193 vdev_dbgmsg(svd, "vdev_copy_path: vdev type mismatch: %s != %s",
2194 svd->vdev_ops->vdev_op_type, dvd->vdev_ops->vdev_op_type);
2195 return (SET_ERROR(EINVAL));
2198 if (svd->vdev_guid != dvd->vdev_guid) {
2199 vdev_dbgmsg(svd, "vdev_copy_path: guids mismatch (%llu != "
2200 "%llu)", (u_longlong_t)svd->vdev_guid,
2201 (u_longlong_t)dvd->vdev_guid);
2202 return (SET_ERROR(EINVAL));
2205 if (svd->vdev_children != dvd->vdev_children) {
2206 vdev_dbgmsg(svd, "vdev_copy_path: children count mismatch: "
2207 "%llu != %llu", (u_longlong_t)svd->vdev_children,
2208 (u_longlong_t)dvd->vdev_children);
2209 return (SET_ERROR(EINVAL));
2212 for (uint64_t i = 0; i < svd->vdev_children; i++) {
2213 int error = vdev_copy_path_strict(svd->vdev_child[i],
2214 dvd->vdev_child[i]);
2219 if (svd->vdev_ops->vdev_op_leaf)
2220 vdev_copy_path_impl(svd, dvd);
2226 vdev_copy_path_search(vdev_t *stvd, vdev_t *dvd)
2228 ASSERT(stvd->vdev_top == stvd);
2229 ASSERT3U(stvd->vdev_id, ==, dvd->vdev_top->vdev_id);
2231 for (uint64_t i = 0; i < dvd->vdev_children; i++) {
2232 vdev_copy_path_search(stvd, dvd->vdev_child[i]);
2235 if (!dvd->vdev_ops->vdev_op_leaf || !vdev_is_concrete(dvd))
2239 * The idea here is that while a vdev can shift positions within
2240 * a top vdev (when replacing, attaching mirror, etc.) it cannot
2241 * step outside of it.
2243 vdev_t *vd = vdev_lookup_by_guid(stvd, dvd->vdev_guid);
2245 if (vd == NULL || vd->vdev_ops != dvd->vdev_ops)
2248 ASSERT(vd->vdev_ops->vdev_op_leaf);
2250 vdev_copy_path_impl(vd, dvd);
2254 * Recursively copy vdev paths from one root vdev to another. Source and
2255 * destination vdev trees may differ in geometry. For each destination leaf
2256 * vdev, search a vdev with the same guid and top vdev id in the source.
2257 * Intended to copy paths from userland config into MOS config.
2260 vdev_copy_path_relaxed(vdev_t *srvd, vdev_t *drvd)
2262 uint64_t children = MIN(srvd->vdev_children, drvd->vdev_children);
2263 ASSERT(srvd->vdev_ops == &vdev_root_ops);
2264 ASSERT(drvd->vdev_ops == &vdev_root_ops);
2266 for (uint64_t i = 0; i < children; i++) {
2267 vdev_copy_path_search(srvd->vdev_child[i],
2268 drvd->vdev_child[i]);
2273 * Close a virtual device.
2276 vdev_close(vdev_t *vd)
2278 vdev_t *pvd = vd->vdev_parent;
2279 spa_t *spa __maybe_unused = vd->vdev_spa;
2281 ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
2284 * If our parent is reopening, then we are as well, unless we are
2287 if (pvd != NULL && pvd->vdev_reopening)
2288 vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline);
2290 vd->vdev_ops->vdev_op_close(vd);
2292 vdev_cache_purge(vd);
2295 * We record the previous state before we close it, so that if we are
2296 * doing a reopen(), we don't generate FMA ereports if we notice that
2297 * it's still faulted.
2299 vd->vdev_prevstate = vd->vdev_state;
2301 if (vd->vdev_offline)
2302 vd->vdev_state = VDEV_STATE_OFFLINE;
2304 vd->vdev_state = VDEV_STATE_CLOSED;
2305 vd->vdev_stat.vs_aux = VDEV_AUX_NONE;
2309 vdev_hold(vdev_t *vd)
2311 spa_t *spa = vd->vdev_spa;
2313 ASSERT(spa_is_root(spa));
2314 if (spa->spa_state == POOL_STATE_UNINITIALIZED)
2317 for (int c = 0; c < vd->vdev_children; c++)
2318 vdev_hold(vd->vdev_child[c]);
2320 if (vd->vdev_ops->vdev_op_leaf)
2321 vd->vdev_ops->vdev_op_hold(vd);
2325 vdev_rele(vdev_t *vd)
2327 ASSERT(spa_is_root(vd->vdev_spa));
2328 for (int c = 0; c < vd->vdev_children; c++)
2329 vdev_rele(vd->vdev_child[c]);
2331 if (vd->vdev_ops->vdev_op_leaf)
2332 vd->vdev_ops->vdev_op_rele(vd);
2336 * Reopen all interior vdevs and any unopened leaves. We don't actually
2337 * reopen leaf vdevs which had previously been opened as they might deadlock
2338 * on the spa_config_lock. Instead we only obtain the leaf's physical size.
2339 * If the leaf has never been opened then open it, as usual.
2342 vdev_reopen(vdev_t *vd)
2344 spa_t *spa = vd->vdev_spa;
2346 ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
2348 /* set the reopening flag unless we're taking the vdev offline */
2349 vd->vdev_reopening = !vd->vdev_offline;
2351 (void) vdev_open(vd);
2354 * Call vdev_validate() here to make sure we have the same device.
2355 * Otherwise, a device with an invalid label could be successfully
2356 * opened in response to vdev_reopen().
2359 (void) vdev_validate_aux(vd);
2360 if (vdev_readable(vd) && vdev_writeable(vd) &&
2361 vd->vdev_aux == &spa->spa_l2cache) {
2363 * In case the vdev is present we should evict all ARC
2364 * buffers and pointers to log blocks and reclaim their
2365 * space before restoring its contents to L2ARC.
2367 if (l2arc_vdev_present(vd)) {
2368 l2arc_rebuild_vdev(vd, B_TRUE);
2370 l2arc_add_vdev(spa, vd);
2372 spa_async_request(spa, SPA_ASYNC_L2CACHE_REBUILD);
2373 spa_async_request(spa, SPA_ASYNC_L2CACHE_TRIM);
2376 (void) vdev_validate(vd);
2380 * Reassess parent vdev's health.
2382 vdev_propagate_state(vd);
2386 vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing)
2391 * Normally, partial opens (e.g. of a mirror) are allowed.
2392 * For a create, however, we want to fail the request if
2393 * there are any components we can't open.
2395 error = vdev_open(vd);
2397 if (error || vd->vdev_state != VDEV_STATE_HEALTHY) {
2399 return (error ? error : SET_ERROR(ENXIO));
2403 * Recursively load DTLs and initialize all labels.
2405 if ((error = vdev_dtl_load(vd)) != 0 ||
2406 (error = vdev_label_init(vd, txg, isreplacing ?
2407 VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) {
2416 vdev_metaslab_set_size(vdev_t *vd)
2418 uint64_t asize = vd->vdev_asize;
2419 uint64_t ms_count = asize >> zfs_vdev_default_ms_shift;
2423 * There are two dimensions to the metaslab sizing calculation:
2424 * the size of the metaslab and the count of metaslabs per vdev.
2426 * The default values used below are a good balance between memory
2427 * usage (larger metaslab size means more memory needed for loaded
2428 * metaslabs; more metaslabs means more memory needed for the
2429 * metaslab_t structs), metaslab load time (larger metaslabs take
2430 * longer to load), and metaslab sync time (more metaslabs means
2431 * more time spent syncing all of them).
2433 * In general, we aim for zfs_vdev_default_ms_count (200) metaslabs.
2434 * The range of the dimensions are as follows:
2436 * 2^29 <= ms_size <= 2^34
2437 * 16 <= ms_count <= 131,072
2439 * On the lower end of vdev sizes, we aim for metaslabs sizes of
2440 * at least 512MB (2^29) to minimize fragmentation effects when
2441 * testing with smaller devices. However, the count constraint
2442 * of at least 16 metaslabs will override this minimum size goal.
2444 * On the upper end of vdev sizes, we aim for a maximum metaslab
2445 * size of 16GB. However, we will cap the total count to 2^17
2446 * metaslabs to keep our memory footprint in check and let the
2447 * metaslab size grow from there if that limit is hit.
2449 * The net effect of applying above constrains is summarized below.
2451 * vdev size metaslab count
2452 * --------------|-----------------
2454 * 8GB - 100GB one per 512MB
2456 * 3TB - 2PB one per 16GB
2458 * --------------------------------
2460 * Finally, note that all of the above calculate the initial
2461 * number of metaslabs. Expanding a top-level vdev will result
2462 * in additional metaslabs being allocated making it possible
2463 * to exceed the zfs_vdev_ms_count_limit.
2466 if (ms_count < zfs_vdev_min_ms_count)
2467 ms_shift = highbit64(asize / zfs_vdev_min_ms_count);
2468 else if (ms_count > zfs_vdev_default_ms_count)
2469 ms_shift = highbit64(asize / zfs_vdev_default_ms_count);
2471 ms_shift = zfs_vdev_default_ms_shift;
2473 if (ms_shift < SPA_MAXBLOCKSHIFT) {
2474 ms_shift = SPA_MAXBLOCKSHIFT;
2475 } else if (ms_shift > zfs_vdev_max_ms_shift) {
2476 ms_shift = zfs_vdev_max_ms_shift;
2477 /* cap the total count to constrain memory footprint */
2478 if ((asize >> ms_shift) > zfs_vdev_ms_count_limit)
2479 ms_shift = highbit64(asize / zfs_vdev_ms_count_limit);
2482 vd->vdev_ms_shift = ms_shift;
2483 ASSERT3U(vd->vdev_ms_shift, >=, SPA_MAXBLOCKSHIFT);
2487 vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg)
2489 ASSERT(vd == vd->vdev_top);
2490 /* indirect vdevs don't have metaslabs or dtls */
2491 ASSERT(vdev_is_concrete(vd) || flags == 0);
2492 ASSERT(ISP2(flags));
2493 ASSERT(spa_writeable(vd->vdev_spa));
2495 if (flags & VDD_METASLAB)
2496 (void) txg_list_add(&vd->vdev_ms_list, arg, txg);
2498 if (flags & VDD_DTL)
2499 (void) txg_list_add(&vd->vdev_dtl_list, arg, txg);
2501 (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg);
2505 vdev_dirty_leaves(vdev_t *vd, int flags, uint64_t txg)
2507 for (int c = 0; c < vd->vdev_children; c++)
2508 vdev_dirty_leaves(vd->vdev_child[c], flags, txg);
2510 if (vd->vdev_ops->vdev_op_leaf)
2511 vdev_dirty(vd->vdev_top, flags, vd, txg);
2517 * A vdev's DTL (dirty time log) is the set of transaction groups for which
2518 * the vdev has less than perfect replication. There are four kinds of DTL:
2520 * DTL_MISSING: txgs for which the vdev has no valid copies of the data
2522 * DTL_PARTIAL: txgs for which data is available, but not fully replicated
2524 * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon
2525 * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of
2526 * txgs that was scrubbed.
2528 * DTL_OUTAGE: txgs which cannot currently be read, whether due to
2529 * persistent errors or just some device being offline.
2530 * Unlike the other three, the DTL_OUTAGE map is not generally
2531 * maintained; it's only computed when needed, typically to
2532 * determine whether a device can be detached.
2534 * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device
2535 * either has the data or it doesn't.
2537 * For interior vdevs such as mirror and RAID-Z the picture is more complex.
2538 * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because
2539 * if any child is less than fully replicated, then so is its parent.
2540 * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs,
2541 * comprising only those txgs which appear in 'maxfaults' or more children;
2542 * those are the txgs we don't have enough replication to read. For example,
2543 * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2);
2544 * thus, its DTL_MISSING consists of the set of txgs that appear in more than
2545 * two child DTL_MISSING maps.
2547 * It should be clear from the above that to compute the DTLs and outage maps
2548 * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps.
2549 * Therefore, that is all we keep on disk. When loading the pool, or after
2550 * a configuration change, we generate all other DTLs from first principles.
2553 vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size)
2555 range_tree_t *rt = vd->vdev_dtl[t];
2557 ASSERT(t < DTL_TYPES);
2558 ASSERT(vd != vd->vdev_spa->spa_root_vdev);
2559 ASSERT(spa_writeable(vd->vdev_spa));
2561 mutex_enter(&vd->vdev_dtl_lock);
2562 if (!range_tree_contains(rt, txg, size))
2563 range_tree_add(rt, txg, size);
2564 mutex_exit(&vd->vdev_dtl_lock);
2568 vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size)
2570 range_tree_t *rt = vd->vdev_dtl[t];
2571 boolean_t dirty = B_FALSE;
2573 ASSERT(t < DTL_TYPES);
2574 ASSERT(vd != vd->vdev_spa->spa_root_vdev);
2577 * While we are loading the pool, the DTLs have not been loaded yet.
2578 * Ignore the DTLs and try all devices. This avoids a recursive
2579 * mutex enter on the vdev_dtl_lock, and also makes us try hard
2580 * when loading the pool (relying on the checksum to ensure that
2581 * we get the right data -- note that we while loading, we are
2582 * only reading the MOS, which is always checksummed).
2584 if (vd->vdev_spa->spa_load_state != SPA_LOAD_NONE)
2587 mutex_enter(&vd->vdev_dtl_lock);
2588 if (!range_tree_is_empty(rt))
2589 dirty = range_tree_contains(rt, txg, size);
2590 mutex_exit(&vd->vdev_dtl_lock);
2596 vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t)
2598 range_tree_t *rt = vd->vdev_dtl[t];
2601 mutex_enter(&vd->vdev_dtl_lock);
2602 empty = range_tree_is_empty(rt);
2603 mutex_exit(&vd->vdev_dtl_lock);
2609 * Returns B_TRUE if vdev determines offset needs to be resilvered.
2612 vdev_dtl_need_resilver(vdev_t *vd, uint64_t offset, size_t psize)
2614 ASSERT(vd != vd->vdev_spa->spa_root_vdev);
2616 if (vd->vdev_ops->vdev_op_need_resilver == NULL ||
2617 vd->vdev_ops->vdev_op_leaf)
2620 return (vd->vdev_ops->vdev_op_need_resilver(vd, offset, psize));
2624 * Returns the lowest txg in the DTL range.
2627 vdev_dtl_min(vdev_t *vd)
2629 ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock));
2630 ASSERT3U(range_tree_space(vd->vdev_dtl[DTL_MISSING]), !=, 0);
2631 ASSERT0(vd->vdev_children);
2633 return (range_tree_min(vd->vdev_dtl[DTL_MISSING]) - 1);
2637 * Returns the highest txg in the DTL.
2640 vdev_dtl_max(vdev_t *vd)
2642 ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock));
2643 ASSERT3U(range_tree_space(vd->vdev_dtl[DTL_MISSING]), !=, 0);
2644 ASSERT0(vd->vdev_children);
2646 return (range_tree_max(vd->vdev_dtl[DTL_MISSING]));
2650 * Determine if a resilvering vdev should remove any DTL entries from
2651 * its range. If the vdev was resilvering for the entire duration of the
2652 * scan then it should excise that range from its DTLs. Otherwise, this
2653 * vdev is considered partially resilvered and should leave its DTL
2654 * entries intact. The comment in vdev_dtl_reassess() describes how we
2658 vdev_dtl_should_excise(vdev_t *vd, boolean_t rebuild_done)
2660 ASSERT0(vd->vdev_children);
2662 if (vd->vdev_state < VDEV_STATE_DEGRADED)
2665 if (vd->vdev_resilver_deferred)
2668 if (range_tree_is_empty(vd->vdev_dtl[DTL_MISSING]))
2672 vdev_rebuild_t *vr = &vd->vdev_top->vdev_rebuild_config;
2673 vdev_rebuild_phys_t *vrp = &vr->vr_rebuild_phys;
2675 /* Rebuild not initiated by attach */
2676 if (vd->vdev_rebuild_txg == 0)
2680 * When a rebuild completes without error then all missing data
2681 * up to the rebuild max txg has been reconstructed and the DTL
2682 * is eligible for excision.
2684 if (vrp->vrp_rebuild_state == VDEV_REBUILD_COMPLETE &&
2685 vdev_dtl_max(vd) <= vrp->vrp_max_txg) {
2686 ASSERT3U(vrp->vrp_min_txg, <=, vdev_dtl_min(vd));
2687 ASSERT3U(vrp->vrp_min_txg, <, vd->vdev_rebuild_txg);
2688 ASSERT3U(vd->vdev_rebuild_txg, <=, vrp->vrp_max_txg);
2692 dsl_scan_t *scn = vd->vdev_spa->spa_dsl_pool->dp_scan;
2693 dsl_scan_phys_t *scnp __maybe_unused = &scn->scn_phys;
2695 /* Resilver not initiated by attach */
2696 if (vd->vdev_resilver_txg == 0)
2700 * When a resilver is initiated the scan will assign the
2701 * scn_max_txg value to the highest txg value that exists
2702 * in all DTLs. If this device's max DTL is not part of this
2703 * scan (i.e. it is not in the range (scn_min_txg, scn_max_txg]
2704 * then it is not eligible for excision.
2706 if (vdev_dtl_max(vd) <= scn->scn_phys.scn_max_txg) {
2707 ASSERT3U(scnp->scn_min_txg, <=, vdev_dtl_min(vd));
2708 ASSERT3U(scnp->scn_min_txg, <, vd->vdev_resilver_txg);
2709 ASSERT3U(vd->vdev_resilver_txg, <=, scnp->scn_max_txg);
2718 * Reassess DTLs after a config change or scrub completion. If txg == 0 no
2719 * write operations will be issued to the pool.
2722 vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
2723 boolean_t scrub_done, boolean_t rebuild_done)
2725 spa_t *spa = vd->vdev_spa;
2729 ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0);
2731 for (int c = 0; c < vd->vdev_children; c++)
2732 vdev_dtl_reassess(vd->vdev_child[c], txg,
2733 scrub_txg, scrub_done, rebuild_done);
2735 if (vd == spa->spa_root_vdev || !vdev_is_concrete(vd) || vd->vdev_aux)
2738 if (vd->vdev_ops->vdev_op_leaf) {
2739 dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan;
2740 vdev_rebuild_t *vr = &vd->vdev_top->vdev_rebuild_config;
2741 boolean_t check_excise = B_FALSE;
2742 boolean_t wasempty = B_TRUE;
2744 mutex_enter(&vd->vdev_dtl_lock);
2747 * If requested, pretend the scan or rebuild completed cleanly.
2749 if (zfs_scan_ignore_errors) {
2751 scn->scn_phys.scn_errors = 0;
2753 vr->vr_rebuild_phys.vrp_errors = 0;
2756 if (scrub_txg != 0 &&
2757 !range_tree_is_empty(vd->vdev_dtl[DTL_MISSING])) {
2759 zfs_dbgmsg("guid:%llu txg:%llu scrub:%llu started:%d "
2760 "dtl:%llu/%llu errors:%llu",
2761 (u_longlong_t)vd->vdev_guid, (u_longlong_t)txg,
2762 (u_longlong_t)scrub_txg, spa->spa_scrub_started,
2763 (u_longlong_t)vdev_dtl_min(vd),
2764 (u_longlong_t)vdev_dtl_max(vd),
2765 (u_longlong_t)(scn ? scn->scn_phys.scn_errors : 0));
2769 * If we've completed a scrub/resilver or a rebuild cleanly
2770 * then determine if this vdev should remove any DTLs. We
2771 * only want to excise regions on vdevs that were available
2772 * during the entire duration of this scan.
2775 vr != NULL && vr->vr_rebuild_phys.vrp_errors == 0) {
2776 check_excise = B_TRUE;
2778 if (spa->spa_scrub_started ||
2779 (scn != NULL && scn->scn_phys.scn_errors == 0)) {
2780 check_excise = B_TRUE;
2784 if (scrub_txg && check_excise &&
2785 vdev_dtl_should_excise(vd, rebuild_done)) {
2787 * We completed a scrub, resilver or rebuild up to
2788 * scrub_txg. If we did it without rebooting, then
2789 * the scrub dtl will be valid, so excise the old
2790 * region and fold in the scrub dtl. Otherwise,
2791 * leave the dtl as-is if there was an error.
2793 * There's little trick here: to excise the beginning
2794 * of the DTL_MISSING map, we put it into a reference
2795 * tree and then add a segment with refcnt -1 that
2796 * covers the range [0, scrub_txg). This means
2797 * that each txg in that range has refcnt -1 or 0.
2798 * We then add DTL_SCRUB with a refcnt of 2, so that
2799 * entries in the range [0, scrub_txg) will have a
2800 * positive refcnt -- either 1 or 2. We then convert
2801 * the reference tree into the new DTL_MISSING map.
2803 space_reftree_create(&reftree);
2804 space_reftree_add_map(&reftree,
2805 vd->vdev_dtl[DTL_MISSING], 1);
2806 space_reftree_add_seg(&reftree, 0, scrub_txg, -1);
2807 space_reftree_add_map(&reftree,
2808 vd->vdev_dtl[DTL_SCRUB], 2);
2809 space_reftree_generate_map(&reftree,
2810 vd->vdev_dtl[DTL_MISSING], 1);
2811 space_reftree_destroy(&reftree);
2813 if (!range_tree_is_empty(vd->vdev_dtl[DTL_MISSING])) {
2814 zfs_dbgmsg("update DTL_MISSING:%llu/%llu",
2815 (u_longlong_t)vdev_dtl_min(vd),
2816 (u_longlong_t)vdev_dtl_max(vd));
2817 } else if (!wasempty) {
2818 zfs_dbgmsg("DTL_MISSING is now empty");
2821 range_tree_vacate(vd->vdev_dtl[DTL_PARTIAL], NULL, NULL);
2822 range_tree_walk(vd->vdev_dtl[DTL_MISSING],
2823 range_tree_add, vd->vdev_dtl[DTL_PARTIAL]);
2825 range_tree_vacate(vd->vdev_dtl[DTL_SCRUB], NULL, NULL);
2826 range_tree_vacate(vd->vdev_dtl[DTL_OUTAGE], NULL, NULL);
2827 if (!vdev_readable(vd))
2828 range_tree_add(vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL);
2830 range_tree_walk(vd->vdev_dtl[DTL_MISSING],
2831 range_tree_add, vd->vdev_dtl[DTL_OUTAGE]);
2834 * If the vdev was resilvering or rebuilding and no longer
2835 * has any DTLs then reset the appropriate flag and dirty
2836 * the top level so that we persist the change.
2839 range_tree_is_empty(vd->vdev_dtl[DTL_MISSING]) &&
2840 range_tree_is_empty(vd->vdev_dtl[DTL_OUTAGE])) {
2841 if (vd->vdev_rebuild_txg != 0) {
2842 vd->vdev_rebuild_txg = 0;
2843 vdev_config_dirty(vd->vdev_top);
2844 } else if (vd->vdev_resilver_txg != 0) {
2845 vd->vdev_resilver_txg = 0;
2846 vdev_config_dirty(vd->vdev_top);
2850 mutex_exit(&vd->vdev_dtl_lock);
2853 vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg);
2857 mutex_enter(&vd->vdev_dtl_lock);
2858 for (int t = 0; t < DTL_TYPES; t++) {
2859 /* account for child's outage in parent's missing map */
2860 int s = (t == DTL_MISSING) ? DTL_OUTAGE: t;
2862 continue; /* leaf vdevs only */
2863 if (t == DTL_PARTIAL)
2864 minref = 1; /* i.e. non-zero */
2865 else if (vd->vdev_nparity != 0)
2866 minref = vd->vdev_nparity + 1; /* RAID-Z */
2868 minref = vd->vdev_children; /* any kind of mirror */
2869 space_reftree_create(&reftree);
2870 for (int c = 0; c < vd->vdev_children; c++) {
2871 vdev_t *cvd = vd->vdev_child[c];
2872 mutex_enter(&cvd->vdev_dtl_lock);
2873 space_reftree_add_map(&reftree, cvd->vdev_dtl[s], 1);
2874 mutex_exit(&cvd->vdev_dtl_lock);
2876 space_reftree_generate_map(&reftree, vd->vdev_dtl[t], minref);
2877 space_reftree_destroy(&reftree);
2879 mutex_exit(&vd->vdev_dtl_lock);
2883 vdev_dtl_load(vdev_t *vd)
2885 spa_t *spa = vd->vdev_spa;
2886 objset_t *mos = spa->spa_meta_objset;
2889 if (vd->vdev_ops->vdev_op_leaf && vd->vdev_dtl_object != 0) {
2890 ASSERT(vdev_is_concrete(vd));
2892 error = space_map_open(&vd->vdev_dtl_sm, mos,
2893 vd->vdev_dtl_object, 0, -1ULL, 0);
2896 ASSERT(vd->vdev_dtl_sm != NULL);
2898 mutex_enter(&vd->vdev_dtl_lock);
2899 error = space_map_load(vd->vdev_dtl_sm,
2900 vd->vdev_dtl[DTL_MISSING], SM_ALLOC);
2901 mutex_exit(&vd->vdev_dtl_lock);
2906 for (int c = 0; c < vd->vdev_children; c++) {
2907 error = vdev_dtl_load(vd->vdev_child[c]);
2916 vdev_zap_allocation_data(vdev_t *vd, dmu_tx_t *tx)
2918 spa_t *spa = vd->vdev_spa;
2919 objset_t *mos = spa->spa_meta_objset;
2920 vdev_alloc_bias_t alloc_bias = vd->vdev_alloc_bias;
2923 ASSERT(alloc_bias != VDEV_BIAS_NONE);
2926 (alloc_bias == VDEV_BIAS_LOG) ? VDEV_ALLOC_BIAS_LOG :
2927 (alloc_bias == VDEV_BIAS_SPECIAL) ? VDEV_ALLOC_BIAS_SPECIAL :
2928 (alloc_bias == VDEV_BIAS_DEDUP) ? VDEV_ALLOC_BIAS_DEDUP : NULL;
2930 ASSERT(string != NULL);
2931 VERIFY0(zap_add(mos, vd->vdev_top_zap, VDEV_TOP_ZAP_ALLOCATION_BIAS,
2932 1, strlen(string) + 1, string, tx));
2934 if (alloc_bias == VDEV_BIAS_SPECIAL || alloc_bias == VDEV_BIAS_DEDUP) {
2935 spa_activate_allocation_classes(spa, tx);
2940 vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj, dmu_tx_t *tx)
2942 spa_t *spa = vd->vdev_spa;
2944 VERIFY0(zap_destroy(spa->spa_meta_objset, zapobj, tx));
2945 VERIFY0(zap_remove_int(spa->spa_meta_objset, spa->spa_all_vdev_zaps,
2950 vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx)
2952 spa_t *spa = vd->vdev_spa;
2953 uint64_t zap = zap_create(spa->spa_meta_objset, DMU_OTN_ZAP_METADATA,
2954 DMU_OT_NONE, 0, tx);
2957 VERIFY0(zap_add_int(spa->spa_meta_objset, spa->spa_all_vdev_zaps,
2964 vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx)
2966 if (vd->vdev_ops != &vdev_hole_ops &&
2967 vd->vdev_ops != &vdev_missing_ops &&
2968 vd->vdev_ops != &vdev_root_ops &&
2969 !vd->vdev_top->vdev_removing) {
2970 if (vd->vdev_ops->vdev_op_leaf && vd->vdev_leaf_zap == 0) {
2971 vd->vdev_leaf_zap = vdev_create_link_zap(vd, tx);
2973 if (vd == vd->vdev_top && vd->vdev_top_zap == 0) {
2974 vd->vdev_top_zap = vdev_create_link_zap(vd, tx);
2975 if (vd->vdev_alloc_bias != VDEV_BIAS_NONE)
2976 vdev_zap_allocation_data(vd, tx);
2980 for (uint64_t i = 0; i < vd->vdev_children; i++) {
2981 vdev_construct_zaps(vd->vdev_child[i], tx);
2986 vdev_dtl_sync(vdev_t *vd, uint64_t txg)
2988 spa_t *spa = vd->vdev_spa;
2989 range_tree_t *rt = vd->vdev_dtl[DTL_MISSING];
2990 objset_t *mos = spa->spa_meta_objset;
2991 range_tree_t *rtsync;
2993 uint64_t object = space_map_object(vd->vdev_dtl_sm);
2995 ASSERT(vdev_is_concrete(vd));
2996 ASSERT(vd->vdev_ops->vdev_op_leaf);
2998 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
3000 if (vd->vdev_detached || vd->vdev_top->vdev_removing) {
3001 mutex_enter(&vd->vdev_dtl_lock);
3002 space_map_free(vd->vdev_dtl_sm, tx);
3003 space_map_close(vd->vdev_dtl_sm);
3004 vd->vdev_dtl_sm = NULL;
3005 mutex_exit(&vd->vdev_dtl_lock);
3008 * We only destroy the leaf ZAP for detached leaves or for
3009 * removed log devices. Removed data devices handle leaf ZAP
3010 * cleanup later, once cancellation is no longer possible.
3012 if (vd->vdev_leaf_zap != 0 && (vd->vdev_detached ||
3013 vd->vdev_top->vdev_islog)) {
3014 vdev_destroy_unlink_zap(vd, vd->vdev_leaf_zap, tx);
3015 vd->vdev_leaf_zap = 0;
3022 if (vd->vdev_dtl_sm == NULL) {
3023 uint64_t new_object;
3025 new_object = space_map_alloc(mos, zfs_vdev_dtl_sm_blksz, tx);
3026 VERIFY3U(new_object, !=, 0);
3028 VERIFY0(space_map_open(&vd->vdev_dtl_sm, mos, new_object,
3030 ASSERT(vd->vdev_dtl_sm != NULL);
3033 rtsync = range_tree_create(NULL, RANGE_SEG64, NULL, 0, 0);
3035 mutex_enter(&vd->vdev_dtl_lock);
3036 range_tree_walk(rt, range_tree_add, rtsync);
3037 mutex_exit(&vd->vdev_dtl_lock);
3039 space_map_truncate(vd->vdev_dtl_sm, zfs_vdev_dtl_sm_blksz, tx);
3040 space_map_write(vd->vdev_dtl_sm, rtsync, SM_ALLOC, SM_NO_VDEVID, tx);
3041 range_tree_vacate(rtsync, NULL, NULL);
3043 range_tree_destroy(rtsync);
3046 * If the object for the space map has changed then dirty
3047 * the top level so that we update the config.
3049 if (object != space_map_object(vd->vdev_dtl_sm)) {
3050 vdev_dbgmsg(vd, "txg %llu, spa %s, DTL old object %llu, "
3051 "new object %llu", (u_longlong_t)txg, spa_name(spa),
3052 (u_longlong_t)object,
3053 (u_longlong_t)space_map_object(vd->vdev_dtl_sm));
3054 vdev_config_dirty(vd->vdev_top);
3061 * Determine whether the specified vdev can be offlined/detached/removed
3062 * without losing data.
3065 vdev_dtl_required(vdev_t *vd)
3067 spa_t *spa = vd->vdev_spa;
3068 vdev_t *tvd = vd->vdev_top;
3069 uint8_t cant_read = vd->vdev_cant_read;
3072 ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
3074 if (vd == spa->spa_root_vdev || vd == tvd)
3078 * Temporarily mark the device as unreadable, and then determine
3079 * whether this results in any DTL outages in the top-level vdev.
3080 * If not, we can safely offline/detach/remove the device.
3082 vd->vdev_cant_read = B_TRUE;
3083 vdev_dtl_reassess(tvd, 0, 0, B_FALSE, B_FALSE);
3084 required = !vdev_dtl_empty(tvd, DTL_OUTAGE);
3085 vd->vdev_cant_read = cant_read;
3086 vdev_dtl_reassess(tvd, 0, 0, B_FALSE, B_FALSE);
3088 if (!required && zio_injection_enabled) {
3089 required = !!zio_handle_device_injection(vd, NULL,
3097 * Determine if resilver is needed, and if so the txg range.
3100 vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp)
3102 boolean_t needed = B_FALSE;
3103 uint64_t thismin = UINT64_MAX;
3104 uint64_t thismax = 0;
3106 if (vd->vdev_children == 0) {
3107 mutex_enter(&vd->vdev_dtl_lock);
3108 if (!range_tree_is_empty(vd->vdev_dtl[DTL_MISSING]) &&
3109 vdev_writeable(vd)) {
3111 thismin = vdev_dtl_min(vd);
3112 thismax = vdev_dtl_max(vd);
3115 mutex_exit(&vd->vdev_dtl_lock);
3117 for (int c = 0; c < vd->vdev_children; c++) {
3118 vdev_t *cvd = vd->vdev_child[c];
3119 uint64_t cmin, cmax;
3121 if (vdev_resilver_needed(cvd, &cmin, &cmax)) {
3122 thismin = MIN(thismin, cmin);
3123 thismax = MAX(thismax, cmax);
3129 if (needed && minp) {
3137 * Gets the checkpoint space map object from the vdev's ZAP. On success sm_obj
3138 * will contain either the checkpoint spacemap object or zero if none exists.
3139 * All other errors are returned to the caller.
3142 vdev_checkpoint_sm_object(vdev_t *vd, uint64_t *sm_obj)
3144 ASSERT0(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER));
3146 if (vd->vdev_top_zap == 0) {
3151 int error = zap_lookup(spa_meta_objset(vd->vdev_spa), vd->vdev_top_zap,
3152 VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1, sm_obj);
3153 if (error == ENOENT) {
3162 vdev_load(vdev_t *vd)
3167 * Recursively load all children.
3169 for (int c = 0; c < vd->vdev_children; c++) {
3170 error = vdev_load(vd->vdev_child[c]);
3176 vdev_set_deflate_ratio(vd);
3179 * On spa_load path, grab the allocation bias from our zap
3181 if (vd == vd->vdev_top && vd->vdev_top_zap != 0) {
3182 spa_t *spa = vd->vdev_spa;
3185 error = zap_lookup(spa->spa_meta_objset, vd->vdev_top_zap,
3186 VDEV_TOP_ZAP_ALLOCATION_BIAS, 1, sizeof (bias_str),
3189 ASSERT(vd->vdev_alloc_bias == VDEV_BIAS_NONE);
3190 vd->vdev_alloc_bias = vdev_derive_alloc_bias(bias_str);
3191 } else if (error != ENOENT) {
3192 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
3193 VDEV_AUX_CORRUPT_DATA);
3194 vdev_dbgmsg(vd, "vdev_load: zap_lookup(top_zap=%llu) "
3195 "failed [error=%d]", vd->vdev_top_zap, error);
3201 * Load any rebuild state from the top-level vdev zap.
3203 if (vd == vd->vdev_top && vd->vdev_top_zap != 0) {
3204 error = vdev_rebuild_load(vd);
3205 if (error && error != ENOTSUP) {
3206 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
3207 VDEV_AUX_CORRUPT_DATA);
3208 vdev_dbgmsg(vd, "vdev_load: vdev_rebuild_load "
3209 "failed [error=%d]", error);
3215 * If this is a top-level vdev, initialize its metaslabs.
3217 if (vd == vd->vdev_top && vdev_is_concrete(vd)) {
3218 vdev_metaslab_group_create(vd);
3220 if (vd->vdev_ashift == 0 || vd->vdev_asize == 0) {
3221 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
3222 VDEV_AUX_CORRUPT_DATA);
3223 vdev_dbgmsg(vd, "vdev_load: invalid size. ashift=%llu, "
3224 "asize=%llu", (u_longlong_t)vd->vdev_ashift,
3225 (u_longlong_t)vd->vdev_asize);
3226 return (SET_ERROR(ENXIO));
3229 error = vdev_metaslab_init(vd, 0);
3231 vdev_dbgmsg(vd, "vdev_load: metaslab_init failed "
3232 "[error=%d]", error);
3233 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
3234 VDEV_AUX_CORRUPT_DATA);
3238 uint64_t checkpoint_sm_obj;
3239 error = vdev_checkpoint_sm_object(vd, &checkpoint_sm_obj);
3240 if (error == 0 && checkpoint_sm_obj != 0) {
3241 objset_t *mos = spa_meta_objset(vd->vdev_spa);
3242 ASSERT(vd->vdev_asize != 0);
3243 ASSERT3P(vd->vdev_checkpoint_sm, ==, NULL);
3245 error = space_map_open(&vd->vdev_checkpoint_sm,
3246 mos, checkpoint_sm_obj, 0, vd->vdev_asize,
3249 vdev_dbgmsg(vd, "vdev_load: space_map_open "
3250 "failed for checkpoint spacemap (obj %llu) "
3252 (u_longlong_t)checkpoint_sm_obj, error);
3255 ASSERT3P(vd->vdev_checkpoint_sm, !=, NULL);
3258 * Since the checkpoint_sm contains free entries
3259 * exclusively we can use space_map_allocated() to
3260 * indicate the cumulative checkpointed space that
3263 vd->vdev_stat.vs_checkpoint_space =
3264 -space_map_allocated(vd->vdev_checkpoint_sm);
3265 vd->vdev_spa->spa_checkpoint_info.sci_dspace +=
3266 vd->vdev_stat.vs_checkpoint_space;
3267 } else if (error != 0) {
3268 vdev_dbgmsg(vd, "vdev_load: failed to retrieve "
3269 "checkpoint space map object from vdev ZAP "
3270 "[error=%d]", error);
3276 * If this is a leaf vdev, load its DTL.
3278 if (vd->vdev_ops->vdev_op_leaf && (error = vdev_dtl_load(vd)) != 0) {
3279 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
3280 VDEV_AUX_CORRUPT_DATA);
3281 vdev_dbgmsg(vd, "vdev_load: vdev_dtl_load failed "
3282 "[error=%d]", error);
3286 uint64_t obsolete_sm_object;
3287 error = vdev_obsolete_sm_object(vd, &obsolete_sm_object);
3288 if (error == 0 && obsolete_sm_object != 0) {
3289 objset_t *mos = vd->vdev_spa->spa_meta_objset;
3290 ASSERT(vd->vdev_asize != 0);
3291 ASSERT3P(vd->vdev_obsolete_sm, ==, NULL);
3293 if ((error = space_map_open(&vd->vdev_obsolete_sm, mos,
3294 obsolete_sm_object, 0, vd->vdev_asize, 0))) {
3295 vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN,
3296 VDEV_AUX_CORRUPT_DATA);
3297 vdev_dbgmsg(vd, "vdev_load: space_map_open failed for "
3298 "obsolete spacemap (obj %llu) [error=%d]",
3299 (u_longlong_t)obsolete_sm_object, error);
3302 } else if (error != 0) {
3303 vdev_dbgmsg(vd, "vdev_load: failed to retrieve obsolete "
3304 "space map object from vdev ZAP [error=%d]", error);
3312 * The special vdev case is used for hot spares and l2cache devices. Its
3313 * sole purpose it to set the vdev state for the associated vdev. To do this,
3314 * we make sure that we can open the underlying device, then try to read the
3315 * label, and make sure that the label is sane and that it hasn't been
3316 * repurposed to another pool.
3319 vdev_validate_aux(vdev_t *vd)
3322 uint64_t guid, version;
3325 if (!vdev_readable(vd))
3328 if ((label = vdev_label_read_config(vd, -1ULL)) == NULL) {
3329 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
3330 VDEV_AUX_CORRUPT_DATA);
3334 if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 ||
3335 !SPA_VERSION_IS_SUPPORTED(version) ||
3336 nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 ||
3337 guid != vd->vdev_guid ||
3338 nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) {
3339 vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN,
3340 VDEV_AUX_CORRUPT_DATA);
3346 * We don't actually check the pool state here. If it's in fact in
3347 * use by another pool, we update this fact on the fly when requested.
3354 vdev_destroy_ms_flush_data(vdev_t *vd, dmu_tx_t *tx)
3356 objset_t *mos = spa_meta_objset(vd->vdev_spa);
3358 if (vd->vdev_top_zap == 0)
3361 uint64_t object = 0;
3362 int err = zap_lookup(mos, vd->vdev_top_zap,
3363 VDEV_TOP_ZAP_MS_UNFLUSHED_PHYS_TXGS, sizeof (uint64_t), 1, &object);
3368 VERIFY0(dmu_object_free(mos, object, tx));
3369 VERIFY0(zap_remove(mos, vd->vdev_top_zap,
3370 VDEV_TOP_ZAP_MS_UNFLUSHED_PHYS_TXGS, tx));
3374 * Free the objects used to store this vdev's spacemaps, and the array
3375 * that points to them.
3378 vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx)
3380 if (vd->vdev_ms_array == 0)
3383 objset_t *mos = vd->vdev_spa->spa_meta_objset;
3384 uint64_t array_count = vd->vdev_asize >> vd->vdev_ms_shift;
3385 size_t array_bytes = array_count * sizeof (uint64_t);
3386 uint64_t *smobj_array = kmem_alloc(array_bytes, KM_SLEEP);
3387 VERIFY0(dmu_read(mos, vd->vdev_ms_array, 0,
3388 array_bytes, smobj_array, 0));
3390 for (uint64_t i = 0; i < array_count; i++) {
3391 uint64_t smobj = smobj_array[i];
3395 space_map_free_obj(mos, smobj, tx);
3398 kmem_free(smobj_array, array_bytes);
3399 VERIFY0(dmu_object_free(mos, vd->vdev_ms_array, tx));
3400 vdev_destroy_ms_flush_data(vd, tx);
3401 vd->vdev_ms_array = 0;
3405 vdev_remove_empty_log(vdev_t *vd, uint64_t txg)
3407 spa_t *spa = vd->vdev_spa;
3409 ASSERT(vd->vdev_islog);
3410 ASSERT(vd == vd->vdev_top);
3411 ASSERT3U(txg, ==, spa_syncing_txg(spa));
3413 dmu_tx_t *tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg);
3415 vdev_destroy_spacemaps(vd, tx);
3416 if (vd->vdev_top_zap != 0) {
3417 vdev_destroy_unlink_zap(vd, vd->vdev_top_zap, tx);
3418 vd->vdev_top_zap = 0;
3425 vdev_sync_done(vdev_t *vd, uint64_t txg)
3428 boolean_t reassess = !txg_list_empty(&vd->vdev_ms_list, TXG_CLEAN(txg));
3430 ASSERT(vdev_is_concrete(vd));
3432 while ((msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg)))
3434 metaslab_sync_done(msp, txg);
3437 metaslab_sync_reassess(vd->vdev_mg);
3441 vdev_sync(vdev_t *vd, uint64_t txg)
3443 spa_t *spa = vd->vdev_spa;
3447 ASSERT3U(txg, ==, spa->spa_syncing_txg);
3448 dmu_tx_t *tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
3449 if (range_tree_space(vd->vdev_obsolete_segments) > 0) {
3450 ASSERT(vd->vdev_removing ||
3451 vd->vdev_ops == &vdev_indirect_ops);
3453 vdev_indirect_sync_obsolete(vd, tx);
3456 * If the vdev is indirect, it can't have dirty
3457 * metaslabs or DTLs.
3459 if (vd->vdev_ops == &vdev_indirect_ops) {
3460 ASSERT(txg_list_empty(&vd->vdev_ms_list, txg));
3461 ASSERT(txg_list_empty(&vd->vdev_dtl_list, txg));
3467 ASSERT(vdev_is_concrete(vd));
3469 if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0 &&
3470 !vd->vdev_removing) {
3471 ASSERT(vd == vd->vdev_top);
3472 ASSERT0(vd->vdev_indirect_config.vic_mapping_object);
3473 vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset,
3474 DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx);
3475 ASSERT(vd->vdev_ms_array != 0);
3476 vdev_config_dirty(vd);
3479 while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) {
3480 metaslab_sync(msp, txg);
3481 (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg));
3484 while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL)
3485 vdev_dtl_sync(lvd, txg);
3488 * If this is an empty log device being removed, destroy the
3489 * metadata associated with it.
3491 if (vd->vdev_islog && vd->vdev_stat.vs_alloc == 0 && vd->vdev_removing)
3492 vdev_remove_empty_log(vd, txg);
3494 (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg));
3499 vdev_psize_to_asize(vdev_t *vd, uint64_t psize)
3501 return (vd->vdev_ops->vdev_op_asize(vd, psize));
3505 * Mark the given vdev faulted. A faulted vdev behaves as if the device could
3506 * not be opened, and no I/O is attempted.
3509 vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux)
3513 spa_vdev_state_enter(spa, SCL_NONE);
3515 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
3516 return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENODEV)));
3518 if (!vd->vdev_ops->vdev_op_leaf)
3519 return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENOTSUP)));
3524 * If user did a 'zpool offline -f' then make the fault persist across
3527 if (aux == VDEV_AUX_EXTERNAL_PERSIST) {
3529 * There are two kinds of forced faults: temporary and
3530 * persistent. Temporary faults go away at pool import, while
3531 * persistent faults stay set. Both types of faults can be
3532 * cleared with a zpool clear.
3534 * We tell if a vdev is persistently faulted by looking at the
3535 * ZPOOL_CONFIG_AUX_STATE nvpair. If it's set to "external" at
3536 * import then it's a persistent fault. Otherwise, it's
3537 * temporary. We get ZPOOL_CONFIG_AUX_STATE set to "external"
3538 * by setting vd.vdev_stat.vs_aux to VDEV_AUX_EXTERNAL. This
3539 * tells vdev_config_generate() (which gets run later) to set
3540 * ZPOOL_CONFIG_AUX_STATE to "external" in the nvlist.
3542 vd->vdev_stat.vs_aux = VDEV_AUX_EXTERNAL;
3543 vd->vdev_tmpoffline = B_FALSE;
3544 aux = VDEV_AUX_EXTERNAL;
3546 vd->vdev_tmpoffline = B_TRUE;
3550 * We don't directly use the aux state here, but if we do a
3551 * vdev_reopen(), we need this value to be present to remember why we
3554 vd->vdev_label_aux = aux;
3557 * Faulted state takes precedence over degraded.
3559 vd->vdev_delayed_close = B_FALSE;
3560 vd->vdev_faulted = 1ULL;
3561 vd->vdev_degraded = 0ULL;
3562 vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, aux);
3565 * If this device has the only valid copy of the data, then
3566 * back off and simply mark the vdev as degraded instead.
3568 if (!tvd->vdev_islog && vd->vdev_aux == NULL && vdev_dtl_required(vd)) {
3569 vd->vdev_degraded = 1ULL;
3570 vd->vdev_faulted = 0ULL;
3573 * If we reopen the device and it's not dead, only then do we
3578 if (vdev_readable(vd))
3579 vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, aux);
3582 return (spa_vdev_state_exit(spa, vd, 0));
3586 * Mark the given vdev degraded. A degraded vdev is purely an indication to the
3587 * user that something is wrong. The vdev continues to operate as normal as far
3588 * as I/O is concerned.
3591 vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux)
3595 spa_vdev_state_enter(spa, SCL_NONE);
3597 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
3598 return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENODEV)));
3600 if (!vd->vdev_ops->vdev_op_leaf)
3601 return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENOTSUP)));
3604 * If the vdev is already faulted, then don't do anything.
3606 if (vd->vdev_faulted || vd->vdev_degraded)
3607 return (spa_vdev_state_exit(spa, NULL, 0));
3609 vd->vdev_degraded = 1ULL;
3610 if (!vdev_is_dead(vd))
3611 vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED,
3614 return (spa_vdev_state_exit(spa, vd, 0));
3618 * Online the given vdev.
3620 * If 'ZFS_ONLINE_UNSPARE' is set, it implies two things. First, any attached
3621 * spare device should be detached when the device finishes resilvering.
3622 * Second, the online should be treated like a 'test' online case, so no FMA
3623 * events are generated if the device fails to open.
3626 vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate)
3628 vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev;
3629 boolean_t wasoffline;
3630 vdev_state_t oldstate;
3632 spa_vdev_state_enter(spa, SCL_NONE);
3634 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
3635 return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENODEV)));
3637 if (!vd->vdev_ops->vdev_op_leaf)
3638 return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENOTSUP)));
3640 wasoffline = (vd->vdev_offline || vd->vdev_tmpoffline);
3641 oldstate = vd->vdev_state;
3644 vd->vdev_offline = B_FALSE;
3645 vd->vdev_tmpoffline = B_FALSE;
3646 vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE);
3647 vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT);
3649 /* XXX - L2ARC 1.0 does not support expansion */
3650 if (!vd->vdev_aux) {
3651 for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent)
3652 pvd->vdev_expanding = !!((flags & ZFS_ONLINE_EXPAND) ||
3653 spa->spa_autoexpand);
3654 vd->vdev_expansion_time = gethrestime_sec();
3658 vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE;
3660 if (!vd->vdev_aux) {
3661 for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent)
3662 pvd->vdev_expanding = B_FALSE;
3666 *newstate = vd->vdev_state;
3667 if ((flags & ZFS_ONLINE_UNSPARE) &&
3668 !vdev_is_dead(vd) && vd->vdev_parent &&
3669 vd->vdev_parent->vdev_ops == &vdev_spare_ops &&
3670 vd->vdev_parent->vdev_child[0] == vd)
3671 vd->vdev_unspare = B_TRUE;
3673 if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) {
3675 /* XXX - L2ARC 1.0 does not support expansion */
3677 return (spa_vdev_state_exit(spa, vd, ENOTSUP));
3678 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
3681 /* Restart initializing if necessary */
3682 mutex_enter(&vd->vdev_initialize_lock);
3683 if (vdev_writeable(vd) &&
3684 vd->vdev_initialize_thread == NULL &&
3685 vd->vdev_initialize_state == VDEV_INITIALIZE_ACTIVE) {
3686 (void) vdev_initialize(vd);
3688 mutex_exit(&vd->vdev_initialize_lock);
3691 * Restart trimming if necessary. We do not restart trimming for cache
3692 * devices here. This is triggered by l2arc_rebuild_vdev()
3693 * asynchronously for the whole device or in l2arc_evict() as it evicts
3694 * space for upcoming writes.
3696 mutex_enter(&vd->vdev_trim_lock);
3697 if (vdev_writeable(vd) && !vd->vdev_isl2cache &&
3698 vd->vdev_trim_thread == NULL &&
3699 vd->vdev_trim_state == VDEV_TRIM_ACTIVE) {
3700 (void) vdev_trim(vd, vd->vdev_trim_rate, vd->vdev_trim_partial,
3701 vd->vdev_trim_secure);
3703 mutex_exit(&vd->vdev_trim_lock);
3706 (oldstate < VDEV_STATE_DEGRADED &&
3707 vd->vdev_state >= VDEV_STATE_DEGRADED))
3708 spa_event_notify(spa, vd, NULL, ESC_ZFS_VDEV_ONLINE);
3710 return (spa_vdev_state_exit(spa, vd, 0));
3714 vdev_offline_locked(spa_t *spa, uint64_t guid, uint64_t flags)
3718 uint64_t generation;
3719 metaslab_group_t *mg;
3722 spa_vdev_state_enter(spa, SCL_ALLOC);
3724 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
3725 return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENODEV)));
3727 if (!vd->vdev_ops->vdev_op_leaf)
3728 return (spa_vdev_state_exit(spa, NULL, SET_ERROR(ENOTSUP)));
3732 generation = spa->spa_config_generation + 1;
3735 * If the device isn't already offline, try to offline it.
3737 if (!vd->vdev_offline) {
3739 * If this device has the only valid copy of some data,
3740 * don't allow it to be offlined. Log devices are always
3743 if (!tvd->vdev_islog && vd->vdev_aux == NULL &&
3744 vdev_dtl_required(vd))
3745 return (spa_vdev_state_exit(spa, NULL,
3749 * If the top-level is a slog and it has had allocations
3750 * then proceed. We check that the vdev's metaslab group
3751 * is not NULL since it's possible that we may have just
3752 * added this vdev but not yet initialized its metaslabs.
3754 if (tvd->vdev_islog && mg != NULL) {
3756 * Prevent any future allocations.
3758 metaslab_group_passivate(mg);
3759 (void) spa_vdev_state_exit(spa, vd, 0);
3761 error = spa_reset_logs(spa);
3764 * If the log device was successfully reset but has
3765 * checkpointed data, do not offline it.
3768 tvd->vdev_checkpoint_sm != NULL) {
3769 ASSERT3U(space_map_allocated(
3770 tvd->vdev_checkpoint_sm), !=, 0);
3771 error = ZFS_ERR_CHECKPOINT_EXISTS;
3774 spa_vdev_state_enter(spa, SCL_ALLOC);
3777 * Check to see if the config has changed.
3779 if (error || generation != spa->spa_config_generation) {
3780 metaslab_group_activate(mg);
3782 return (spa_vdev_state_exit(spa,
3784 (void) spa_vdev_state_exit(spa, vd, 0);
3787 ASSERT0(tvd->vdev_stat.vs_alloc);
3791 * Offline this device and reopen its top-level vdev.
3792 * If the top-level vdev is a log device then just offline
3793 * it. Otherwise, if this action results in the top-level
3794 * vdev becoming unusable, undo it and fail the request.
3796 vd->vdev_offline = B_TRUE;
3799 if (!tvd->vdev_islog && vd->vdev_aux == NULL &&
3800 vdev_is_dead(tvd)) {
3801 vd->vdev_offline = B_FALSE;
3803 return (spa_vdev_state_exit(spa, NULL,
3808 * Add the device back into the metaslab rotor so that
3809 * once we online the device it's open for business.
3811 if (tvd->vdev_islog && mg != NULL)
3812 metaslab_group_activate(mg);
3815 vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY);
3817 return (spa_vdev_state_exit(spa, vd, 0));
3821 vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags)
3825 mutex_enter(&spa->spa_vdev_top_lock);
3826 error = vdev_offline_locked(spa, guid, flags);
3827 mutex_exit(&spa->spa_vdev_top_lock);
3833 * Clear the error counts associated with this vdev. Unlike vdev_online() and
3834 * vdev_offline(), we assume the spa config is locked. We also clear all
3835 * children. If 'vd' is NULL, then the user wants to clear all vdevs.
3838 vdev_clear(spa_t *spa, vdev_t *vd)
3840 vdev_t *rvd = spa->spa_root_vdev;
3842 ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL);
3847 vd->vdev_stat.vs_read_errors = 0;
3848 vd->vdev_stat.vs_write_errors = 0;
3849 vd->vdev_stat.vs_checksum_errors = 0;
3850 vd->vdev_stat.vs_slow_ios = 0;
3852 for (int c = 0; c < vd->vdev_children; c++)
3853 vdev_clear(spa, vd->vdev_child[c]);
3856 * It makes no sense to "clear" an indirect vdev.
3858 if (!vdev_is_concrete(vd))
3862 * If we're in the FAULTED state or have experienced failed I/O, then
3863 * clear the persistent state and attempt to reopen the device. We
3864 * also mark the vdev config dirty, so that the new faulted state is
3865 * written out to disk.
3867 if (vd->vdev_faulted || vd->vdev_degraded ||
3868 !vdev_readable(vd) || !vdev_writeable(vd)) {
3870 * When reopening in response to a clear event, it may be due to
3871 * a fmadm repair request. In this case, if the device is
3872 * still broken, we want to still post the ereport again.
3874 vd->vdev_forcefault = B_TRUE;
3876 vd->vdev_faulted = vd->vdev_degraded = 0ULL;
3877 vd->vdev_cant_read = B_FALSE;
3878 vd->vdev_cant_write = B_FALSE;
3879 vd->vdev_stat.vs_aux = 0;
3881 vdev_reopen(vd == rvd ? rvd : vd->vdev_top);
3883 vd->vdev_forcefault = B_FALSE;
3885 if (vd != rvd && vdev_writeable(vd->vdev_top))
3886 vdev_state_dirty(vd->vdev_top);
3888 /* If a resilver isn't required, check if vdevs can be culled */
3889 if (vd->vdev_aux == NULL && !vdev_is_dead(vd) &&
3890 !dsl_scan_resilvering(spa->spa_dsl_pool) &&
3891 !dsl_scan_resilver_scheduled(spa->spa_dsl_pool))
3892 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE);
3894 spa_event_notify(spa, vd, NULL, ESC_ZFS_VDEV_CLEAR);
3898 * When clearing a FMA-diagnosed fault, we always want to
3899 * unspare the device, as we assume that the original spare was
3900 * done in response to the FMA fault.
3902 if (!vdev_is_dead(vd) && vd->vdev_parent != NULL &&
3903 vd->vdev_parent->vdev_ops == &vdev_spare_ops &&
3904 vd->vdev_parent->vdev_child[0] == vd)
3905 vd->vdev_unspare = B_TRUE;
3909 vdev_is_dead(vdev_t *vd)
3912 * Holes and missing devices are always considered "dead".
3913 * This simplifies the code since we don't have to check for
3914 * these types of devices in the various code paths.
3915 * Instead we rely on the fact that we skip over dead devices
3916 * before issuing I/O to them.
3918 return (vd->vdev_state < VDEV_STATE_DEGRADED ||
3919 vd->vdev_ops == &vdev_hole_ops ||
3920 vd->vdev_ops == &vdev_missing_ops);
3924 vdev_readable(vdev_t *vd)
3926 return (!vdev_is_dead(vd) && !vd->vdev_cant_read);
3930 vdev_writeable(vdev_t *vd)
3932 return (!vdev_is_dead(vd) && !vd->vdev_cant_write &&
3933 vdev_is_concrete(vd));
3937 vdev_allocatable(vdev_t *vd)
3939 uint64_t state = vd->vdev_state;
3942 * We currently allow allocations from vdevs which may be in the
3943 * process of reopening (i.e. VDEV_STATE_CLOSED). If the device
3944 * fails to reopen then we'll catch it later when we're holding
3945 * the proper locks. Note that we have to get the vdev state
3946 * in a local variable because although it changes atomically,
3947 * we're asking two separate questions about it.
3949 return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) &&
3950 !vd->vdev_cant_write && vdev_is_concrete(vd) &&
3951 vd->vdev_mg->mg_initialized);
3955 vdev_accessible(vdev_t *vd, zio_t *zio)
3957 ASSERT(zio->io_vd == vd);
3959 if (vdev_is_dead(vd) || vd->vdev_remove_wanted)
3962 if (zio->io_type == ZIO_TYPE_READ)
3963 return (!vd->vdev_cant_read);
3965 if (zio->io_type == ZIO_TYPE_WRITE)
3966 return (!vd->vdev_cant_write);
3972 vdev_get_child_stat(vdev_t *cvd, vdev_stat_t *vs, vdev_stat_t *cvs)
3974 for (int t = 0; t < VS_ZIO_TYPES; t++) {
3975 vs->vs_ops[t] += cvs->vs_ops[t];
3976 vs->vs_bytes[t] += cvs->vs_bytes[t];
3979 cvs->vs_scan_removing = cvd->vdev_removing;
3983 * Get extended stats
3986 vdev_get_child_stat_ex(vdev_t *cvd, vdev_stat_ex_t *vsx, vdev_stat_ex_t *cvsx)
3989 for (t = 0; t < ZIO_TYPES; t++) {
3990 for (b = 0; b < ARRAY_SIZE(vsx->vsx_disk_histo[0]); b++)
3991 vsx->vsx_disk_histo[t][b] += cvsx->vsx_disk_histo[t][b];
3993 for (b = 0; b < ARRAY_SIZE(vsx->vsx_total_histo[0]); b++) {
3994 vsx->vsx_total_histo[t][b] +=
3995 cvsx->vsx_total_histo[t][b];
3999 for (t = 0; t < ZIO_PRIORITY_NUM_QUEUEABLE; t++) {
4000 for (b = 0; b < ARRAY_SIZE(vsx->vsx_queue_histo[0]); b++) {
4001 vsx->vsx_queue_histo[t][b] +=
4002 cvsx->vsx_queue_histo[t][b];
4004 vsx->vsx_active_queue[t] += cvsx->vsx_active_queue[t];
4005 vsx->vsx_pend_queue[t] += cvsx->vsx_pend_queue[t];
4007 for (b = 0; b < ARRAY_SIZE(vsx->vsx_ind_histo[0]); b++)
4008 vsx->vsx_ind_histo[t][b] += cvsx->vsx_ind_histo[t][b];
4010 for (b = 0; b < ARRAY_SIZE(vsx->vsx_agg_histo[0]); b++)
4011 vsx->vsx_agg_histo[t][b] += cvsx->vsx_agg_histo[t][b];
4017 vdev_is_spacemap_addressable(vdev_t *vd)
4019 if (spa_feature_is_active(vd->vdev_spa, SPA_FEATURE_SPACEMAP_V2))
4023 * If double-word space map entries are not enabled we assume
4024 * 47 bits of the space map entry are dedicated to the entry's
4025 * offset (see SM_OFFSET_BITS in space_map.h). We then use that
4026 * to calculate the maximum address that can be described by a
4027 * space map entry for the given device.
4029 uint64_t shift = vd->vdev_ashift + SM_OFFSET_BITS;
4031 if (shift >= 63) /* detect potential overflow */
4034 return (vd->vdev_asize < (1ULL << shift));
4038 * Get statistics for the given vdev.
4041 vdev_get_stats_ex_impl(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx)
4045 * If we're getting stats on the root vdev, aggregate the I/O counts
4046 * over all top-level vdevs (i.e. the direct children of the root).
4048 if (!vd->vdev_ops->vdev_op_leaf) {
4050 memset(vs->vs_ops, 0, sizeof (vs->vs_ops));
4051 memset(vs->vs_bytes, 0, sizeof (vs->vs_bytes));
4054 memset(vsx, 0, sizeof (*vsx));
4056 for (int c = 0; c < vd->vdev_children; c++) {
4057 vdev_t *cvd = vd->vdev_child[c];
4058 vdev_stat_t *cvs = &cvd->vdev_stat;
4059 vdev_stat_ex_t *cvsx = &cvd->vdev_stat_ex;
4061 vdev_get_stats_ex_impl(cvd, cvs, cvsx);
4063 vdev_get_child_stat(cvd, vs, cvs);
4065 vdev_get_child_stat_ex(cvd, vsx, cvsx);
4070 * We're a leaf. Just copy our ZIO active queue stats in. The
4071 * other leaf stats are updated in vdev_stat_update().
4076 memcpy(vsx, &vd->vdev_stat_ex, sizeof (vd->vdev_stat_ex));
4078 for (t = 0; t < ARRAY_SIZE(vd->vdev_queue.vq_class); t++) {
4079 vsx->vsx_active_queue[t] =
4080 vd->vdev_queue.vq_class[t].vqc_active;
4081 vsx->vsx_pend_queue[t] = avl_numnodes(
4082 &vd->vdev_queue.vq_class[t].vqc_queued_tree);
4088 vdev_get_stats_ex(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx)
4090 vdev_t *tvd = vd->vdev_top;
4091 mutex_enter(&vd->vdev_stat_lock);
4093 bcopy(&vd->vdev_stat, vs, sizeof (*vs));
4094 vs->vs_timestamp = gethrtime() - vs->vs_timestamp;
4095 vs->vs_state = vd->vdev_state;
4096 vs->vs_rsize = vdev_get_min_asize(vd);
4098 if (vd->vdev_ops->vdev_op_leaf) {
4099 vs->vs_rsize += VDEV_LABEL_START_SIZE +
4100 VDEV_LABEL_END_SIZE;
4102 * Report initializing progress. Since we don't
4103 * have the initializing locks held, this is only
4104 * an estimate (although a fairly accurate one).
4106 vs->vs_initialize_bytes_done =
4107 vd->vdev_initialize_bytes_done;
4108 vs->vs_initialize_bytes_est =
4109 vd->vdev_initialize_bytes_est;
4110 vs->vs_initialize_state = vd->vdev_initialize_state;
4111 vs->vs_initialize_action_time =
4112 vd->vdev_initialize_action_time;
4115 * Report manual TRIM progress. Since we don't have
4116 * the manual TRIM locks held, this is only an
4117 * estimate (although fairly accurate one).
4119 vs->vs_trim_notsup = !vd->vdev_has_trim;
4120 vs->vs_trim_bytes_done = vd->vdev_trim_bytes_done;
4121 vs->vs_trim_bytes_est = vd->vdev_trim_bytes_est;
4122 vs->vs_trim_state = vd->vdev_trim_state;
4123 vs->vs_trim_action_time = vd->vdev_trim_action_time;
4125 /* Set when there is a deferred resilver. */
4126 vs->vs_resilver_deferred = vd->vdev_resilver_deferred;
4130 * Report expandable space on top-level, non-auxiliary devices
4131 * only. The expandable space is reported in terms of metaslab
4132 * sized units since that determines how much space the pool
4135 if (vd->vdev_aux == NULL && tvd != NULL) {
4136 vs->vs_esize = P2ALIGN(
4137 vd->vdev_max_asize - vd->vdev_asize,
4138 1ULL << tvd->vdev_ms_shift);
4141 vs->vs_configured_ashift = vd->vdev_top != NULL
4142 ? vd->vdev_top->vdev_ashift : vd->vdev_ashift;
4143 vs->vs_logical_ashift = vd->vdev_logical_ashift;
4144 vs->vs_physical_ashift = vd->vdev_physical_ashift;
4147 * Report fragmentation and rebuild progress for top-level,
4148 * non-auxiliary, concrete devices.
4150 if (vd->vdev_aux == NULL && vd == vd->vdev_top &&
4151 vdev_is_concrete(vd)) {
4152 vs->vs_fragmentation = (vd->vdev_mg != NULL) ?
4153 vd->vdev_mg->mg_fragmentation : 0;
4157 vdev_get_stats_ex_impl(vd, vs, vsx);
4158 mutex_exit(&vd->vdev_stat_lock);
4162 vdev_get_stats(vdev_t *vd, vdev_stat_t *vs)
4164 return (vdev_get_stats_ex(vd, vs, NULL));
4168 vdev_clear_stats(vdev_t *vd)
4170 mutex_enter(&vd->vdev_stat_lock);
4171 vd->vdev_stat.vs_space = 0;
4172 vd->vdev_stat.vs_dspace = 0;
4173 vd->vdev_stat.vs_alloc = 0;
4174 mutex_exit(&vd->vdev_stat_lock);
4178 vdev_scan_stat_init(vdev_t *vd)
4180 vdev_stat_t *vs = &vd->vdev_stat;
4182 for (int c = 0; c < vd->vdev_children; c++)
4183 vdev_scan_stat_init(vd->vdev_child[c]);
4185 mutex_enter(&vd->vdev_stat_lock);
4186 vs->vs_scan_processed = 0;
4187 mutex_exit(&vd->vdev_stat_lock);
4191 vdev_stat_update(zio_t *zio, uint64_t psize)
4193 spa_t *spa = zio->io_spa;
4194 vdev_t *rvd = spa->spa_root_vdev;
4195 vdev_t *vd = zio->io_vd ? zio->io_vd : rvd;
4197 uint64_t txg = zio->io_txg;
4198 vdev_stat_t *vs = &vd->vdev_stat;
4199 vdev_stat_ex_t *vsx = &vd->vdev_stat_ex;
4200 zio_type_t type = zio->io_type;
4201 int flags = zio->io_flags;
4204 * If this i/o is a gang leader, it didn't do any actual work.
4206 if (zio->io_gang_tree)
4209 if (zio->io_error == 0) {
4211 * If this is a root i/o, don't count it -- we've already
4212 * counted the top-level vdevs, and vdev_get_stats() will
4213 * aggregate them when asked. This reduces contention on
4214 * the root vdev_stat_lock and implicitly handles blocks
4215 * that compress away to holes, for which there is no i/o.
4216 * (Holes never create vdev children, so all the counters
4217 * remain zero, which is what we want.)
4219 * Note: this only applies to successful i/o (io_error == 0)
4220 * because unlike i/o counts, errors are not additive.
4221 * When reading a ditto block, for example, failure of
4222 * one top-level vdev does not imply a root-level error.
4227 ASSERT(vd == zio->io_vd);
4229 if (flags & ZIO_FLAG_IO_BYPASS)
4232 mutex_enter(&vd->vdev_stat_lock);
4234 if (flags & ZIO_FLAG_IO_REPAIR) {
4236 * Repair is the result of a resilver issued by the
4237 * scan thread (spa_sync).
4239 if (flags & ZIO_FLAG_SCAN_THREAD) {
4240 dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan;
4241 dsl_scan_phys_t *scn_phys = &scn->scn_phys;
4242 uint64_t *processed = &scn_phys->scn_processed;
4244 if (vd->vdev_ops->vdev_op_leaf)
4245 atomic_add_64(processed, psize);
4246 vs->vs_scan_processed += psize;
4250 * Repair is the result of a rebuild issued by the
4251 * rebuild thread (vdev_rebuild_thread).
4253 if (zio->io_priority == ZIO_PRIORITY_REBUILD) {
4254 vdev_t *tvd = vd->vdev_top;
4255 vdev_rebuild_t *vr = &tvd->vdev_rebuild_config;
4256 vdev_rebuild_phys_t *vrp = &vr->vr_rebuild_phys;
4257 uint64_t *rebuilt = &vrp->vrp_bytes_rebuilt;
4259 if (vd->vdev_ops->vdev_op_leaf)
4260 atomic_add_64(rebuilt, psize);
4261 vs->vs_rebuild_processed += psize;
4264 if (flags & ZIO_FLAG_SELF_HEAL)
4265 vs->vs_self_healed += psize;
4269 * The bytes/ops/histograms are recorded at the leaf level and
4270 * aggregated into the higher level vdevs in vdev_get_stats().
4272 if (vd->vdev_ops->vdev_op_leaf &&
4273 (zio->io_priority < ZIO_PRIORITY_NUM_QUEUEABLE)) {
4274 zio_type_t vs_type = type;
4275 zio_priority_t priority = zio->io_priority;
4278 * TRIM ops and bytes are reported to user space as
4279 * ZIO_TYPE_IOCTL. This is done to preserve the
4280 * vdev_stat_t structure layout for user space.
4282 if (type == ZIO_TYPE_TRIM)
4283 vs_type = ZIO_TYPE_IOCTL;
4286 * Solely for the purposes of 'zpool iostat -lqrw'
4287 * reporting use the priority to catagorize the IO.
4288 * Only the following are reported to user space:
4290 * ZIO_PRIORITY_SYNC_READ,
4291 * ZIO_PRIORITY_SYNC_WRITE,
4292 * ZIO_PRIORITY_ASYNC_READ,
4293 * ZIO_PRIORITY_ASYNC_WRITE,
4294 * ZIO_PRIORITY_SCRUB,
4295 * ZIO_PRIORITY_TRIM.
4297 if (priority == ZIO_PRIORITY_REBUILD) {
4298 priority = ((type == ZIO_TYPE_WRITE) ?
4299 ZIO_PRIORITY_ASYNC_WRITE :
4300 ZIO_PRIORITY_SCRUB);
4301 } else if (priority == ZIO_PRIORITY_INITIALIZING) {
4302 ASSERT3U(type, ==, ZIO_TYPE_WRITE);
4303 priority = ZIO_PRIORITY_ASYNC_WRITE;
4304 } else if (priority == ZIO_PRIORITY_REMOVAL) {
4305 priority = ((type == ZIO_TYPE_WRITE) ?
4306 ZIO_PRIORITY_ASYNC_WRITE :
4307 ZIO_PRIORITY_ASYNC_READ);
4310 vs->vs_ops[vs_type]++;
4311 vs->vs_bytes[vs_type] += psize;
4313 if (flags & ZIO_FLAG_DELEGATED) {
4314 vsx->vsx_agg_histo[priority]
4315 [RQ_HISTO(zio->io_size)]++;
4317 vsx->vsx_ind_histo[priority]
4318 [RQ_HISTO(zio->io_size)]++;
4321 if (zio->io_delta && zio->io_delay) {
4322 vsx->vsx_queue_histo[priority]
4323 [L_HISTO(zio->io_delta - zio->io_delay)]++;
4324 vsx->vsx_disk_histo[type]
4325 [L_HISTO(zio->io_delay)]++;
4326 vsx->vsx_total_histo[type]
4327 [L_HISTO(zio->io_delta)]++;
4331 mutex_exit(&vd->vdev_stat_lock);
4335 if (flags & ZIO_FLAG_SPECULATIVE)
4339 * If this is an I/O error that is going to be retried, then ignore the
4340 * error. Otherwise, the user may interpret B_FAILFAST I/O errors as
4341 * hard errors, when in reality they can happen for any number of
4342 * innocuous reasons (bus resets, MPxIO link failure, etc).
4344 if (zio->io_error == EIO &&
4345 !(zio->io_flags & ZIO_FLAG_IO_RETRY))
4349 * Intent logs writes won't propagate their error to the root
4350 * I/O so don't mark these types of failures as pool-level
4353 if (zio->io_vd == NULL && (zio->io_flags & ZIO_FLAG_DONT_PROPAGATE))
4356 if (spa->spa_load_state == SPA_LOAD_NONE &&
4357 type == ZIO_TYPE_WRITE && txg != 0 &&
4358 (!(flags & ZIO_FLAG_IO_REPAIR) ||
4359 (flags & ZIO_FLAG_SCAN_THREAD) ||
4360 spa->spa_claiming)) {
4362 * This is either a normal write (not a repair), or it's
4363 * a repair induced by the scrub thread, or it's a repair
4364 * made by zil_claim() during spa_load() in the first txg.
4365 * In the normal case, we commit the DTL change in the same
4366 * txg as the block was born. In the scrub-induced repair
4367 * case, we know that scrubs run in first-pass syncing context,
4368 * so we commit the DTL change in spa_syncing_txg(spa).
4369 * In the zil_claim() case, we commit in spa_first_txg(spa).
4371 * We currently do not make DTL entries for failed spontaneous
4372 * self-healing writes triggered by normal (non-scrubbing)
4373 * reads, because we have no transactional context in which to
4374 * do so -- and it's not clear that it'd be desirable anyway.
4376 if (vd->vdev_ops->vdev_op_leaf) {
4377 uint64_t commit_txg = txg;
4378 if (flags & ZIO_FLAG_SCAN_THREAD) {
4379 ASSERT(flags & ZIO_FLAG_IO_REPAIR);
4380 ASSERT(spa_sync_pass(spa) == 1);
4381 vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1);
4382 commit_txg = spa_syncing_txg(spa);
4383 } else if (spa->spa_claiming) {
4384 ASSERT(flags & ZIO_FLAG_IO_REPAIR);
4385 commit_txg = spa_first_txg(spa);
4387 ASSERT(commit_txg >= spa_syncing_txg(spa));
4388 if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1))
4390 for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent)
4391 vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1);
4392 vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg);
4395 vdev_dtl_dirty(vd, DTL_MISSING, txg, 1);
4400 vdev_deflated_space(vdev_t *vd, int64_t space)
4402 ASSERT((space & (SPA_MINBLOCKSIZE-1)) == 0);
4403 ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache);
4405 return ((space >> SPA_MINBLOCKSHIFT) * vd->vdev_deflate_ratio);
4409 * Update the in-core space usage stats for this vdev, its metaslab class,
4410 * and the root vdev.
4413 vdev_space_update(vdev_t *vd, int64_t alloc_delta, int64_t defer_delta,
4414 int64_t space_delta)
4416 int64_t dspace_delta;
4417 spa_t *spa = vd->vdev_spa;
4418 vdev_t *rvd = spa->spa_root_vdev;
4420 ASSERT(vd == vd->vdev_top);
4423 * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion
4424 * factor. We must calculate this here and not at the root vdev
4425 * because the root vdev's psize-to-asize is simply the max of its
4426 * children's, thus not accurate enough for us.
4428 dspace_delta = vdev_deflated_space(vd, space_delta);
4430 mutex_enter(&vd->vdev_stat_lock);
4431 /* ensure we won't underflow */
4432 if (alloc_delta < 0) {
4433 ASSERT3U(vd->vdev_stat.vs_alloc, >=, -alloc_delta);
4436 vd->vdev_stat.vs_alloc += alloc_delta;
4437 vd->vdev_stat.vs_space += space_delta;
4438 vd->vdev_stat.vs_dspace += dspace_delta;
4439 mutex_exit(&vd->vdev_stat_lock);
4441 /* every class but log contributes to root space stats */
4442 if (vd->vdev_mg != NULL && !vd->vdev_islog) {
4443 ASSERT(!vd->vdev_isl2cache);
4444 mutex_enter(&rvd->vdev_stat_lock);
4445 rvd->vdev_stat.vs_alloc += alloc_delta;
4446 rvd->vdev_stat.vs_space += space_delta;
4447 rvd->vdev_stat.vs_dspace += dspace_delta;
4448 mutex_exit(&rvd->vdev_stat_lock);
4450 /* Note: metaslab_class_space_update moved to metaslab_space_update */
4454 * Mark a top-level vdev's config as dirty, placing it on the dirty list
4455 * so that it will be written out next time the vdev configuration is synced.
4456 * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs.
4459 vdev_config_dirty(vdev_t *vd)
4461 spa_t *spa = vd->vdev_spa;
4462 vdev_t *rvd = spa->spa_root_vdev;
4465 ASSERT(spa_writeable(spa));
4468 * If this is an aux vdev (as with l2cache and spare devices), then we
4469 * update the vdev config manually and set the sync flag.
4471 if (vd->vdev_aux != NULL) {
4472 spa_aux_vdev_t *sav = vd->vdev_aux;
4476 for (c = 0; c < sav->sav_count; c++) {
4477 if (sav->sav_vdevs[c] == vd)
4481 if (c == sav->sav_count) {
4483 * We're being removed. There's nothing more to do.
4485 ASSERT(sav->sav_sync == B_TRUE);
4489 sav->sav_sync = B_TRUE;
4491 if (nvlist_lookup_nvlist_array(sav->sav_config,
4492 ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) {
4493 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config,
4494 ZPOOL_CONFIG_SPARES, &aux, &naux) == 0);
4500 * Setting the nvlist in the middle if the array is a little
4501 * sketchy, but it will work.
4503 nvlist_free(aux[c]);
4504 aux[c] = vdev_config_generate(spa, vd, B_TRUE, 0);
4510 * The dirty list is protected by the SCL_CONFIG lock. The caller
4511 * must either hold SCL_CONFIG as writer, or must be the sync thread
4512 * (which holds SCL_CONFIG as reader). There's only one sync thread,
4513 * so this is sufficient to ensure mutual exclusion.
4515 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) ||
4516 (dsl_pool_sync_context(spa_get_dsl(spa)) &&
4517 spa_config_held(spa, SCL_CONFIG, RW_READER)));
4520 for (c = 0; c < rvd->vdev_children; c++)
4521 vdev_config_dirty(rvd->vdev_child[c]);
4523 ASSERT(vd == vd->vdev_top);
4525 if (!list_link_active(&vd->vdev_config_dirty_node) &&
4526 vdev_is_concrete(vd)) {
4527 list_insert_head(&spa->spa_config_dirty_list, vd);
4533 vdev_config_clean(vdev_t *vd)
4535 spa_t *spa = vd->vdev_spa;
4537 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) ||
4538 (dsl_pool_sync_context(spa_get_dsl(spa)) &&
4539 spa_config_held(spa, SCL_CONFIG, RW_READER)));
4541 ASSERT(list_link_active(&vd->vdev_config_dirty_node));
4542 list_remove(&spa->spa_config_dirty_list, vd);
4546 * Mark a top-level vdev's state as dirty, so that the next pass of
4547 * spa_sync() can convert this into vdev_config_dirty(). We distinguish
4548 * the state changes from larger config changes because they require
4549 * much less locking, and are often needed for administrative actions.
4552 vdev_state_dirty(vdev_t *vd)
4554 spa_t *spa = vd->vdev_spa;
4556 ASSERT(spa_writeable(spa));
4557 ASSERT(vd == vd->vdev_top);
4560 * The state list is protected by the SCL_STATE lock. The caller
4561 * must either hold SCL_STATE as writer, or must be the sync thread
4562 * (which holds SCL_STATE as reader). There's only one sync thread,
4563 * so this is sufficient to ensure mutual exclusion.
4565 ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) ||
4566 (dsl_pool_sync_context(spa_get_dsl(spa)) &&
4567 spa_config_held(spa, SCL_STATE, RW_READER)));
4569 if (!list_link_active(&vd->vdev_state_dirty_node) &&
4570 vdev_is_concrete(vd))
4571 list_insert_head(&spa->spa_state_dirty_list, vd);
4575 vdev_state_clean(vdev_t *vd)
4577 spa_t *spa = vd->vdev_spa;
4579 ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) ||
4580 (dsl_pool_sync_context(spa_get_dsl(spa)) &&
4581 spa_config_held(spa, SCL_STATE, RW_READER)));
4583 ASSERT(list_link_active(&vd->vdev_state_dirty_node));
4584 list_remove(&spa->spa_state_dirty_list, vd);
4588 * Propagate vdev state up from children to parent.
4591 vdev_propagate_state(vdev_t *vd)
4593 spa_t *spa = vd->vdev_spa;
4594 vdev_t *rvd = spa->spa_root_vdev;
4595 int degraded = 0, faulted = 0;
4599 if (vd->vdev_children > 0) {
4600 for (int c = 0; c < vd->vdev_children; c++) {
4601 child = vd->vdev_child[c];
4604 * Don't factor holes or indirect vdevs into the
4607 if (!vdev_is_concrete(child))
4610 if (!vdev_readable(child) ||
4611 (!vdev_writeable(child) && spa_writeable(spa))) {
4613 * Root special: if there is a top-level log
4614 * device, treat the root vdev as if it were
4617 if (child->vdev_islog && vd == rvd)
4621 } else if (child->vdev_state <= VDEV_STATE_DEGRADED) {
4625 if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA)
4629 vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded);
4632 * Root special: if there is a top-level vdev that cannot be
4633 * opened due to corrupted metadata, then propagate the root
4634 * vdev's aux state as 'corrupt' rather than 'insufficient
4637 if (corrupted && vd == rvd &&
4638 rvd->vdev_state == VDEV_STATE_CANT_OPEN)
4639 vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN,
4640 VDEV_AUX_CORRUPT_DATA);
4643 if (vd->vdev_parent)
4644 vdev_propagate_state(vd->vdev_parent);
4648 * Set a vdev's state. If this is during an open, we don't update the parent
4649 * state, because we're in the process of opening children depth-first.
4650 * Otherwise, we propagate the change to the parent.
4652 * If this routine places a device in a faulted state, an appropriate ereport is
4656 vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux)
4658 uint64_t save_state;
4659 spa_t *spa = vd->vdev_spa;
4661 if (state == vd->vdev_state) {
4663 * Since vdev_offline() code path is already in an offline
4664 * state we can miss a statechange event to OFFLINE. Check
4665 * the previous state to catch this condition.
4667 if (vd->vdev_ops->vdev_op_leaf &&
4668 (state == VDEV_STATE_OFFLINE) &&
4669 (vd->vdev_prevstate >= VDEV_STATE_FAULTED)) {
4670 /* post an offline state change */
4671 zfs_post_state_change(spa, vd, vd->vdev_prevstate);
4673 vd->vdev_stat.vs_aux = aux;
4677 save_state = vd->vdev_state;
4679 vd->vdev_state = state;
4680 vd->vdev_stat.vs_aux = aux;
4683 * If we are setting the vdev state to anything but an open state, then
4684 * always close the underlying device unless the device has requested
4685 * a delayed close (i.e. we're about to remove or fault the device).
4686 * Otherwise, we keep accessible but invalid devices open forever.
4687 * We don't call vdev_close() itself, because that implies some extra
4688 * checks (offline, etc) that we don't want here. This is limited to
4689 * leaf devices, because otherwise closing the device will affect other
4692 if (!vd->vdev_delayed_close && vdev_is_dead(vd) &&
4693 vd->vdev_ops->vdev_op_leaf)
4694 vd->vdev_ops->vdev_op_close(vd);
4696 if (vd->vdev_removed &&
4697 state == VDEV_STATE_CANT_OPEN &&
4698 (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) {
4700 * If the previous state is set to VDEV_STATE_REMOVED, then this
4701 * device was previously marked removed and someone attempted to
4702 * reopen it. If this failed due to a nonexistent device, then
4703 * keep the device in the REMOVED state. We also let this be if
4704 * it is one of our special test online cases, which is only
4705 * attempting to online the device and shouldn't generate an FMA
4708 vd->vdev_state = VDEV_STATE_REMOVED;
4709 vd->vdev_stat.vs_aux = VDEV_AUX_NONE;
4710 } else if (state == VDEV_STATE_REMOVED) {
4711 vd->vdev_removed = B_TRUE;
4712 } else if (state == VDEV_STATE_CANT_OPEN) {
4714 * If we fail to open a vdev during an import or recovery, we
4715 * mark it as "not available", which signifies that it was
4716 * never there to begin with. Failure to open such a device
4717 * is not considered an error.
4719 if ((spa_load_state(spa) == SPA_LOAD_IMPORT ||
4720 spa_load_state(spa) == SPA_LOAD_RECOVER) &&
4721 vd->vdev_ops->vdev_op_leaf)
4722 vd->vdev_not_present = 1;
4725 * Post the appropriate ereport. If the 'prevstate' field is
4726 * set to something other than VDEV_STATE_UNKNOWN, it indicates
4727 * that this is part of a vdev_reopen(). In this case, we don't
4728 * want to post the ereport if the device was already in the
4729 * CANT_OPEN state beforehand.
4731 * If the 'checkremove' flag is set, then this is an attempt to
4732 * online the device in response to an insertion event. If we
4733 * hit this case, then we have detected an insertion event for a
4734 * faulted or offline device that wasn't in the removed state.
4735 * In this scenario, we don't post an ereport because we are
4736 * about to replace the device, or attempt an online with
4737 * vdev_forcefault, which will generate the fault for us.
4739 if ((vd->vdev_prevstate != state || vd->vdev_forcefault) &&
4740 !vd->vdev_not_present && !vd->vdev_checkremove &&
4741 vd != spa->spa_root_vdev) {
4745 case VDEV_AUX_OPEN_FAILED:
4746 class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED;
4748 case VDEV_AUX_CORRUPT_DATA:
4749 class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA;
4751 case VDEV_AUX_NO_REPLICAS:
4752 class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS;
4754 case VDEV_AUX_BAD_GUID_SUM:
4755 class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM;
4757 case VDEV_AUX_TOO_SMALL:
4758 class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL;
4760 case VDEV_AUX_BAD_LABEL:
4761 class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL;
4763 case VDEV_AUX_BAD_ASHIFT:
4764 class = FM_EREPORT_ZFS_DEVICE_BAD_ASHIFT;
4767 class = FM_EREPORT_ZFS_DEVICE_UNKNOWN;
4770 (void) zfs_ereport_post(class, spa, vd, NULL, NULL,
4774 /* Erase any notion of persistent removed state */
4775 vd->vdev_removed = B_FALSE;
4777 vd->vdev_removed = B_FALSE;
4781 * Notify ZED of any significant state-change on a leaf vdev.
4784 if (vd->vdev_ops->vdev_op_leaf) {
4785 /* preserve original state from a vdev_reopen() */
4786 if ((vd->vdev_prevstate != VDEV_STATE_UNKNOWN) &&
4787 (vd->vdev_prevstate != vd->vdev_state) &&
4788 (save_state <= VDEV_STATE_CLOSED))
4789 save_state = vd->vdev_prevstate;
4791 /* filter out state change due to initial vdev_open */
4792 if (save_state > VDEV_STATE_CLOSED)
4793 zfs_post_state_change(spa, vd, save_state);
4796 if (!isopen && vd->vdev_parent)
4797 vdev_propagate_state(vd->vdev_parent);
4801 vdev_children_are_offline(vdev_t *vd)
4803 ASSERT(!vd->vdev_ops->vdev_op_leaf);
4805 for (uint64_t i = 0; i < vd->vdev_children; i++) {
4806 if (vd->vdev_child[i]->vdev_state != VDEV_STATE_OFFLINE)
4814 * Check the vdev configuration to ensure that it's capable of supporting
4815 * a root pool. We do not support partial configuration.
4818 vdev_is_bootable(vdev_t *vd)
4820 if (!vd->vdev_ops->vdev_op_leaf) {
4821 const char *vdev_type = vd->vdev_ops->vdev_op_type;
4823 if (strcmp(vdev_type, VDEV_TYPE_MISSING) == 0 ||
4824 strcmp(vdev_type, VDEV_TYPE_INDIRECT) == 0) {
4829 for (int c = 0; c < vd->vdev_children; c++) {
4830 if (!vdev_is_bootable(vd->vdev_child[c]))
4837 vdev_is_concrete(vdev_t *vd)
4839 vdev_ops_t *ops = vd->vdev_ops;
4840 if (ops == &vdev_indirect_ops || ops == &vdev_hole_ops ||
4841 ops == &vdev_missing_ops || ops == &vdev_root_ops) {
4849 * Determine if a log device has valid content. If the vdev was
4850 * removed or faulted in the MOS config then we know that
4851 * the content on the log device has already been written to the pool.
4854 vdev_log_state_valid(vdev_t *vd)
4856 if (vd->vdev_ops->vdev_op_leaf && !vd->vdev_faulted &&
4860 for (int c = 0; c < vd->vdev_children; c++)
4861 if (vdev_log_state_valid(vd->vdev_child[c]))
4868 * Expand a vdev if possible.
4871 vdev_expand(vdev_t *vd, uint64_t txg)
4873 ASSERT(vd->vdev_top == vd);
4874 ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL);
4875 ASSERT(vdev_is_concrete(vd));
4877 vdev_set_deflate_ratio(vd);
4879 if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count &&
4880 vdev_is_concrete(vd)) {
4881 vdev_metaslab_group_create(vd);
4882 VERIFY(vdev_metaslab_init(vd, txg) == 0);
4883 vdev_config_dirty(vd);
4891 vdev_split(vdev_t *vd)
4893 vdev_t *cvd, *pvd = vd->vdev_parent;
4895 vdev_remove_child(pvd, vd);
4896 vdev_compact_children(pvd);
4898 cvd = pvd->vdev_child[0];
4899 if (pvd->vdev_children == 1) {
4900 vdev_remove_parent(cvd);
4901 cvd->vdev_splitting = B_TRUE;
4903 vdev_propagate_state(cvd);
4907 vdev_deadman(vdev_t *vd, char *tag)
4909 for (int c = 0; c < vd->vdev_children; c++) {
4910 vdev_t *cvd = vd->vdev_child[c];
4912 vdev_deadman(cvd, tag);
4915 if (vd->vdev_ops->vdev_op_leaf) {
4916 vdev_queue_t *vq = &vd->vdev_queue;
4918 mutex_enter(&vq->vq_lock);
4919 if (avl_numnodes(&vq->vq_active_tree) > 0) {
4920 spa_t *spa = vd->vdev_spa;
4924 zfs_dbgmsg("slow vdev: %s has %d active IOs",
4925 vd->vdev_path, avl_numnodes(&vq->vq_active_tree));
4928 * Look at the head of all the pending queues,
4929 * if any I/O has been outstanding for longer than
4930 * the spa_deadman_synctime invoke the deadman logic.
4932 fio = avl_first(&vq->vq_active_tree);
4933 delta = gethrtime() - fio->io_timestamp;
4934 if (delta > spa_deadman_synctime(spa))
4935 zio_deadman(fio, tag);
4937 mutex_exit(&vq->vq_lock);
4942 vdev_defer_resilver(vdev_t *vd)
4944 ASSERT(vd->vdev_ops->vdev_op_leaf);
4946 vd->vdev_resilver_deferred = B_TRUE;
4947 vd->vdev_spa->spa_resilver_deferred = B_TRUE;
4951 * Clears the resilver deferred flag on all leaf devs under vd. Returns
4952 * B_TRUE if we have devices that need to be resilvered and are available to
4953 * accept resilver I/Os.
4956 vdev_clear_resilver_deferred(vdev_t *vd, dmu_tx_t *tx)
4958 boolean_t resilver_needed = B_FALSE;
4959 spa_t *spa = vd->vdev_spa;
4961 for (int c = 0; c < vd->vdev_children; c++) {
4962 vdev_t *cvd = vd->vdev_child[c];
4963 resilver_needed |= vdev_clear_resilver_deferred(cvd, tx);
4966 if (vd == spa->spa_root_vdev &&
4967 spa_feature_is_active(spa, SPA_FEATURE_RESILVER_DEFER)) {
4968 spa_feature_decr(spa, SPA_FEATURE_RESILVER_DEFER, tx);
4969 vdev_config_dirty(vd);
4970 spa->spa_resilver_deferred = B_FALSE;
4971 return (resilver_needed);
4974 if (!vdev_is_concrete(vd) || vd->vdev_aux ||
4975 !vd->vdev_ops->vdev_op_leaf)
4976 return (resilver_needed);
4978 vd->vdev_resilver_deferred = B_FALSE;
4980 return (!vdev_is_dead(vd) && !vd->vdev_offline &&
4981 vdev_resilver_needed(vd, NULL, NULL));
4985 * Translate a logical range to the physical range for the specified vdev_t.
4986 * This function is initially called with a leaf vdev and will walk each
4987 * parent vdev until it reaches a top-level vdev. Once the top-level is
4988 * reached the physical range is initialized and the recursive function
4989 * begins to unwind. As it unwinds it calls the parent's vdev specific
4990 * translation function to do the real conversion.
4993 vdev_xlate(vdev_t *vd, const range_seg64_t *logical_rs,
4994 range_seg64_t *physical_rs)
4997 * Walk up the vdev tree
4999 if (vd != vd->vdev_top) {
5000 vdev_xlate(vd->vdev_parent, logical_rs, physical_rs);
5003 * We've reached the top-level vdev, initialize the
5004 * physical range to the logical range and start to
5007 physical_rs->rs_start = logical_rs->rs_start;
5008 physical_rs->rs_end = logical_rs->rs_end;
5012 vdev_t *pvd = vd->vdev_parent;
5013 ASSERT3P(pvd, !=, NULL);
5014 ASSERT3P(pvd->vdev_ops->vdev_op_xlate, !=, NULL);
5017 * As this recursive function unwinds, translate the logical
5018 * range into its physical components by calling the
5019 * vdev specific translate function.
5021 range_seg64_t intermediate = { 0 };
5022 pvd->vdev_ops->vdev_op_xlate(vd, physical_rs, &intermediate);
5024 physical_rs->rs_start = intermediate.rs_start;
5025 physical_rs->rs_end = intermediate.rs_end;
5029 * Look at the vdev tree and determine whether any devices are currently being
5033 vdev_replace_in_progress(vdev_t *vdev)
5035 ASSERT(spa_config_held(vdev->vdev_spa, SCL_ALL, RW_READER) != 0);
5037 if (vdev->vdev_ops == &vdev_replacing_ops)
5041 * A 'spare' vdev indicates that we have a replace in progress, unless
5042 * it has exactly two children, and the second, the hot spare, has
5043 * finished being resilvered.
5045 if (vdev->vdev_ops == &vdev_spare_ops && (vdev->vdev_children > 2 ||
5046 !vdev_dtl_empty(vdev->vdev_child[1], DTL_MISSING)))
5049 for (int i = 0; i < vdev->vdev_children; i++) {
5050 if (vdev_replace_in_progress(vdev->vdev_child[i]))
5057 EXPORT_SYMBOL(vdev_fault);
5058 EXPORT_SYMBOL(vdev_degrade);
5059 EXPORT_SYMBOL(vdev_online);
5060 EXPORT_SYMBOL(vdev_offline);
5061 EXPORT_SYMBOL(vdev_clear);
5064 ZFS_MODULE_PARAM(zfs_vdev, zfs_vdev_, default_ms_count, INT, ZMOD_RW,
5065 "Target number of metaslabs per top-level vdev");
5067 ZFS_MODULE_PARAM(zfs_vdev, zfs_vdev_, default_ms_shift, INT, ZMOD_RW,
5068 "Default limit for metaslab size");
5070 ZFS_MODULE_PARAM(zfs_vdev, zfs_vdev_, min_ms_count, INT, ZMOD_RW,
5071 "Minimum number of metaslabs per top-level vdev");
5073 ZFS_MODULE_PARAM(zfs_vdev, zfs_vdev_, ms_count_limit, INT, ZMOD_RW,
5074 "Practical upper limit of total metaslabs per top-level vdev");
5076 ZFS_MODULE_PARAM(zfs, zfs_, slow_io_events_per_second, UINT, ZMOD_RW,
5077 "Rate limit slow IO (delay) events to this many per second");
5079 ZFS_MODULE_PARAM(zfs, zfs_, checksum_events_per_second, UINT, ZMOD_RW,
5080 "Rate limit checksum events to this many checksum errors per second "
5081 "(do not set below zed threshold).");
5083 ZFS_MODULE_PARAM(zfs, zfs_, scan_ignore_errors, INT, ZMOD_RW,
5084 "Ignore errors during resilver/scrub");
5086 ZFS_MODULE_PARAM(zfs_vdev, vdev_, validate_skip, INT, ZMOD_RW,
5087 "Bypass vdev_validate()");
5089 ZFS_MODULE_PARAM(zfs, zfs_, nocacheflush, INT, ZMOD_RW,
5090 "Disable cache flushes");
5092 ZFS_MODULE_PARAM_CALL(zfs_vdev, zfs_vdev_, min_auto_ashift,
5093 param_set_min_auto_ashift, param_get_ulong, ZMOD_RW,
5094 "Minimum ashift used when creating new top-level vdevs");
5096 ZFS_MODULE_PARAM_CALL(zfs_vdev, zfs_vdev_, max_auto_ashift,
5097 param_set_max_auto_ashift, param_get_ulong, ZMOD_RW,
5098 "Maximum ashift used when optimizing for logical -> physical sector "
5099 "size on new top-level vdevs");