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(8).
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");