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, 2018 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.
31 #include <sys/zfs_context.h>
32 #include <sys/fm/fs/zfs.h>
34 #include <sys/spa_impl.h>
35 #include <sys/bpobj.h>
37 #include <sys/dmu_tx.h>
38 #include <sys/dsl_dir.h>
39 #include <sys/vdev_impl.h>
40 #include <sys/uberblock_impl.h>
41 #include <sys/metaslab.h>
42 #include <sys/metaslab_impl.h>
43 #include <sys/space_map.h>
44 #include <sys/space_reftree.h>
47 #include <sys/fs/zfs.h>
50 #include <sys/dsl_scan.h>
52 #include <sys/vdev_initialize.h>
55 * Virtual device management.
58 static vdev_ops_t
*vdev_ops_table
[] = {
72 /* maximum scrub/resilver I/O queue per leaf vdev */
73 int zfs_scrub_limit
= 10;
75 /* maximum number of metaslabs per top-level vdev */
76 int vdev_max_ms_count
= 200;
78 /* minimum amount of metaslabs per top-level vdev */
79 int vdev_min_ms_count
= 16;
81 /* see comment in vdev_metaslab_set_size() */
82 int vdev_default_ms_shift
= 29;
84 boolean_t vdev_validate_skip
= B_FALSE
;
87 * Since the DTL space map of a vdev is not expected to have a lot of
88 * entries, we default its block size to 4K.
90 int vdev_dtl_sm_blksz
= (1 << 12);
93 * vdev-wide space maps that have lots of entries written to them at
94 * the end of each transaction can benefit from a higher I/O bandwidth
95 * (e.g. vdev_obsolete_sm), thus we default their block size to 128K.
97 int vdev_standard_sm_blksz
= (1 << 17);
103 vdev_dbgmsg(vdev_t
*vd
, const char *fmt
, ...)
109 (void) vsnprintf(buf
, sizeof (buf
), fmt
, adx
);
112 if (vd
->vdev_path
!= NULL
) {
113 zfs_dbgmsg("%s vdev '%s': %s", vd
->vdev_ops
->vdev_op_type
,
116 zfs_dbgmsg("%s-%llu vdev (guid %llu): %s",
117 vd
->vdev_ops
->vdev_op_type
,
118 (u_longlong_t
)vd
->vdev_id
,
119 (u_longlong_t
)vd
->vdev_guid
, buf
);
124 vdev_dbgmsg_print_tree(vdev_t
*vd
, int indent
)
128 if (vd
->vdev_ishole
|| vd
->vdev_ops
== &vdev_missing_ops
) {
129 zfs_dbgmsg("%*svdev %u: %s", indent
, "", vd
->vdev_id
,
130 vd
->vdev_ops
->vdev_op_type
);
134 switch (vd
->vdev_state
) {
135 case VDEV_STATE_UNKNOWN
:
136 (void) snprintf(state
, sizeof (state
), "unknown");
138 case VDEV_STATE_CLOSED
:
139 (void) snprintf(state
, sizeof (state
), "closed");
141 case VDEV_STATE_OFFLINE
:
142 (void) snprintf(state
, sizeof (state
), "offline");
144 case VDEV_STATE_REMOVED
:
145 (void) snprintf(state
, sizeof (state
), "removed");
147 case VDEV_STATE_CANT_OPEN
:
148 (void) snprintf(state
, sizeof (state
), "can't open");
150 case VDEV_STATE_FAULTED
:
151 (void) snprintf(state
, sizeof (state
), "faulted");
153 case VDEV_STATE_DEGRADED
:
154 (void) snprintf(state
, sizeof (state
), "degraded");
156 case VDEV_STATE_HEALTHY
:
157 (void) snprintf(state
, sizeof (state
), "healthy");
160 (void) snprintf(state
, sizeof (state
), "<state %u>",
161 (uint_t
)vd
->vdev_state
);
164 zfs_dbgmsg("%*svdev %u: %s%s, guid: %llu, path: %s, %s", indent
,
165 "", vd
->vdev_id
, vd
->vdev_ops
->vdev_op_type
,
166 vd
->vdev_islog
? " (log)" : "",
167 (u_longlong_t
)vd
->vdev_guid
,
168 vd
->vdev_path
? vd
->vdev_path
: "N/A", state
);
170 for (uint64_t i
= 0; i
< vd
->vdev_children
; i
++)
171 vdev_dbgmsg_print_tree(vd
->vdev_child
[i
], indent
+ 2);
175 * Given a vdev type, return the appropriate ops vector.
178 vdev_getops(const char *type
)
180 vdev_ops_t
*ops
, **opspp
;
182 for (opspp
= vdev_ops_table
; (ops
= *opspp
) != NULL
; opspp
++)
183 if (strcmp(ops
->vdev_op_type
, type
) == 0)
191 vdev_default_xlate(vdev_t
*vd
, const range_seg_t
*in
, range_seg_t
*res
)
193 res
->rs_start
= in
->rs_start
;
194 res
->rs_end
= in
->rs_end
;
198 * Default asize function: return the MAX of psize with the asize of
199 * all children. This is what's used by anything other than RAID-Z.
202 vdev_default_asize(vdev_t
*vd
, uint64_t psize
)
204 uint64_t asize
= P2ROUNDUP(psize
, 1ULL << vd
->vdev_top
->vdev_ashift
);
207 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
208 csize
= vdev_psize_to_asize(vd
->vdev_child
[c
], psize
);
209 asize
= MAX(asize
, csize
);
216 * Get the minimum allocatable size. We define the allocatable size as
217 * the vdev's asize rounded to the nearest metaslab. This allows us to
218 * replace or attach devices which don't have the same physical size but
219 * can still satisfy the same number of allocations.
222 vdev_get_min_asize(vdev_t
*vd
)
224 vdev_t
*pvd
= vd
->vdev_parent
;
227 * If our parent is NULL (inactive spare or cache) or is the root,
228 * just return our own asize.
231 return (vd
->vdev_asize
);
234 * The top-level vdev just returns the allocatable size rounded
235 * to the nearest metaslab.
237 if (vd
== vd
->vdev_top
)
238 return (P2ALIGN(vd
->vdev_asize
, 1ULL << vd
->vdev_ms_shift
));
241 * The allocatable space for a raidz vdev is N * sizeof(smallest child),
242 * so each child must provide at least 1/Nth of its asize.
244 if (pvd
->vdev_ops
== &vdev_raidz_ops
)
245 return ((pvd
->vdev_min_asize
+ pvd
->vdev_children
- 1) /
248 return (pvd
->vdev_min_asize
);
252 vdev_set_min_asize(vdev_t
*vd
)
254 vd
->vdev_min_asize
= vdev_get_min_asize(vd
);
256 for (int c
= 0; c
< vd
->vdev_children
; c
++)
257 vdev_set_min_asize(vd
->vdev_child
[c
]);
261 vdev_lookup_top(spa_t
*spa
, uint64_t vdev
)
263 vdev_t
*rvd
= spa
->spa_root_vdev
;
265 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_READER
) != 0);
267 if (vdev
< rvd
->vdev_children
) {
268 ASSERT(rvd
->vdev_child
[vdev
] != NULL
);
269 return (rvd
->vdev_child
[vdev
]);
276 vdev_lookup_by_guid(vdev_t
*vd
, uint64_t guid
)
280 if (vd
->vdev_guid
== guid
)
283 for (int c
= 0; c
< vd
->vdev_children
; c
++)
284 if ((mvd
= vdev_lookup_by_guid(vd
->vdev_child
[c
], guid
)) !=
292 vdev_count_leaves_impl(vdev_t
*vd
)
296 if (vd
->vdev_ops
->vdev_op_leaf
)
299 for (int c
= 0; c
< vd
->vdev_children
; c
++)
300 n
+= vdev_count_leaves_impl(vd
->vdev_child
[c
]);
306 vdev_count_leaves(spa_t
*spa
)
308 return (vdev_count_leaves_impl(spa
->spa_root_vdev
));
312 vdev_add_child(vdev_t
*pvd
, vdev_t
*cvd
)
314 size_t oldsize
, newsize
;
315 uint64_t id
= cvd
->vdev_id
;
317 spa_t
*spa
= cvd
->vdev_spa
;
319 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
320 ASSERT(cvd
->vdev_parent
== NULL
);
322 cvd
->vdev_parent
= pvd
;
327 ASSERT(id
>= pvd
->vdev_children
|| pvd
->vdev_child
[id
] == NULL
);
329 oldsize
= pvd
->vdev_children
* sizeof (vdev_t
*);
330 pvd
->vdev_children
= MAX(pvd
->vdev_children
, id
+ 1);
331 newsize
= pvd
->vdev_children
* sizeof (vdev_t
*);
333 newchild
= kmem_zalloc(newsize
, KM_SLEEP
);
334 if (pvd
->vdev_child
!= NULL
) {
335 bcopy(pvd
->vdev_child
, newchild
, oldsize
);
336 kmem_free(pvd
->vdev_child
, oldsize
);
339 pvd
->vdev_child
= newchild
;
340 pvd
->vdev_child
[id
] = cvd
;
342 cvd
->vdev_top
= (pvd
->vdev_top
? pvd
->vdev_top
: cvd
);
343 ASSERT(cvd
->vdev_top
->vdev_parent
->vdev_parent
== NULL
);
346 * Walk up all ancestors to update guid sum.
348 for (; pvd
!= NULL
; pvd
= pvd
->vdev_parent
)
349 pvd
->vdev_guid_sum
+= cvd
->vdev_guid_sum
;
353 vdev_remove_child(vdev_t
*pvd
, vdev_t
*cvd
)
356 uint_t id
= cvd
->vdev_id
;
358 ASSERT(cvd
->vdev_parent
== pvd
);
363 ASSERT(id
< pvd
->vdev_children
);
364 ASSERT(pvd
->vdev_child
[id
] == cvd
);
366 pvd
->vdev_child
[id
] = NULL
;
367 cvd
->vdev_parent
= NULL
;
369 for (c
= 0; c
< pvd
->vdev_children
; c
++)
370 if (pvd
->vdev_child
[c
])
373 if (c
== pvd
->vdev_children
) {
374 kmem_free(pvd
->vdev_child
, c
* sizeof (vdev_t
*));
375 pvd
->vdev_child
= NULL
;
376 pvd
->vdev_children
= 0;
380 * Walk up all ancestors to update guid sum.
382 for (; pvd
!= NULL
; pvd
= pvd
->vdev_parent
)
383 pvd
->vdev_guid_sum
-= cvd
->vdev_guid_sum
;
387 * Remove any holes in the child array.
390 vdev_compact_children(vdev_t
*pvd
)
392 vdev_t
**newchild
, *cvd
;
393 int oldc
= pvd
->vdev_children
;
396 ASSERT(spa_config_held(pvd
->vdev_spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
398 for (int c
= newc
= 0; c
< oldc
; c
++)
399 if (pvd
->vdev_child
[c
])
402 newchild
= kmem_alloc(newc
* sizeof (vdev_t
*), KM_SLEEP
);
404 for (int c
= newc
= 0; c
< oldc
; c
++) {
405 if ((cvd
= pvd
->vdev_child
[c
]) != NULL
) {
406 newchild
[newc
] = cvd
;
407 cvd
->vdev_id
= newc
++;
411 kmem_free(pvd
->vdev_child
, oldc
* sizeof (vdev_t
*));
412 pvd
->vdev_child
= newchild
;
413 pvd
->vdev_children
= newc
;
417 * Allocate and minimally initialize a vdev_t.
420 vdev_alloc_common(spa_t
*spa
, uint_t id
, uint64_t guid
, vdev_ops_t
*ops
)
423 vdev_indirect_config_t
*vic
;
425 vd
= kmem_zalloc(sizeof (vdev_t
), KM_SLEEP
);
426 vic
= &vd
->vdev_indirect_config
;
428 if (spa
->spa_root_vdev
== NULL
) {
429 ASSERT(ops
== &vdev_root_ops
);
430 spa
->spa_root_vdev
= vd
;
431 spa
->spa_load_guid
= spa_generate_guid(NULL
);
434 if (guid
== 0 && ops
!= &vdev_hole_ops
) {
435 if (spa
->spa_root_vdev
== vd
) {
437 * The root vdev's guid will also be the pool guid,
438 * which must be unique among all pools.
440 guid
= spa_generate_guid(NULL
);
443 * Any other vdev's guid must be unique within the pool.
445 guid
= spa_generate_guid(spa
);
447 ASSERT(!spa_guid_exists(spa_guid(spa
), guid
));
452 vd
->vdev_guid
= guid
;
453 vd
->vdev_guid_sum
= guid
;
455 vd
->vdev_state
= VDEV_STATE_CLOSED
;
456 vd
->vdev_ishole
= (ops
== &vdev_hole_ops
);
457 vic
->vic_prev_indirect_vdev
= UINT64_MAX
;
459 rw_init(&vd
->vdev_indirect_rwlock
, NULL
, RW_DEFAULT
, NULL
);
460 mutex_init(&vd
->vdev_obsolete_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
461 vd
->vdev_obsolete_segments
= range_tree_create(NULL
, NULL
);
463 mutex_init(&vd
->vdev_dtl_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
464 mutex_init(&vd
->vdev_stat_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
465 mutex_init(&vd
->vdev_probe_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
466 mutex_init(&vd
->vdev_queue_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
467 mutex_init(&vd
->vdev_initialize_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
468 mutex_init(&vd
->vdev_initialize_io_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
469 cv_init(&vd
->vdev_initialize_cv
, NULL
, CV_DEFAULT
, NULL
);
470 cv_init(&vd
->vdev_initialize_io_cv
, NULL
, CV_DEFAULT
, NULL
);
472 for (int t
= 0; t
< DTL_TYPES
; t
++) {
473 vd
->vdev_dtl
[t
] = range_tree_create(NULL
, NULL
);
475 txg_list_create(&vd
->vdev_ms_list
, spa
,
476 offsetof(struct metaslab
, ms_txg_node
));
477 txg_list_create(&vd
->vdev_dtl_list
, spa
,
478 offsetof(struct vdev
, vdev_dtl_node
));
479 vd
->vdev_stat
.vs_timestamp
= gethrtime();
487 * Allocate a new vdev. The 'alloctype' is used to control whether we are
488 * creating a new vdev or loading an existing one - the behavior is slightly
489 * different for each case.
492 vdev_alloc(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
, uint_t id
,
497 uint64_t guid
= 0, islog
, nparity
;
499 vdev_indirect_config_t
*vic
;
501 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
503 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_TYPE
, &type
) != 0)
504 return (SET_ERROR(EINVAL
));
506 if ((ops
= vdev_getops(type
)) == NULL
)
507 return (SET_ERROR(EINVAL
));
510 * If this is a load, get the vdev guid from the nvlist.
511 * Otherwise, vdev_alloc_common() will generate one for us.
513 if (alloctype
== VDEV_ALLOC_LOAD
) {
516 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_ID
, &label_id
) ||
518 return (SET_ERROR(EINVAL
));
520 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_GUID
, &guid
) != 0)
521 return (SET_ERROR(EINVAL
));
522 } else if (alloctype
== VDEV_ALLOC_SPARE
) {
523 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_GUID
, &guid
) != 0)
524 return (SET_ERROR(EINVAL
));
525 } else if (alloctype
== VDEV_ALLOC_L2CACHE
) {
526 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_GUID
, &guid
) != 0)
527 return (SET_ERROR(EINVAL
));
528 } else if (alloctype
== VDEV_ALLOC_ROOTPOOL
) {
529 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_GUID
, &guid
) != 0)
530 return (SET_ERROR(EINVAL
));
534 * The first allocated vdev must be of type 'root'.
536 if (ops
!= &vdev_root_ops
&& spa
->spa_root_vdev
== NULL
)
537 return (SET_ERROR(EINVAL
));
540 * Determine whether we're a log vdev.
543 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_IS_LOG
, &islog
);
544 if (islog
&& spa_version(spa
) < SPA_VERSION_SLOGS
)
545 return (SET_ERROR(ENOTSUP
));
547 if (ops
== &vdev_hole_ops
&& spa_version(spa
) < SPA_VERSION_HOLES
)
548 return (SET_ERROR(ENOTSUP
));
551 * Set the nparity property for RAID-Z vdevs.
554 if (ops
== &vdev_raidz_ops
) {
555 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_NPARITY
,
557 if (nparity
== 0 || nparity
> VDEV_RAIDZ_MAXPARITY
)
558 return (SET_ERROR(EINVAL
));
560 * Previous versions could only support 1 or 2 parity
564 spa_version(spa
) < SPA_VERSION_RAIDZ2
)
565 return (SET_ERROR(ENOTSUP
));
567 spa_version(spa
) < SPA_VERSION_RAIDZ3
)
568 return (SET_ERROR(ENOTSUP
));
571 * We require the parity to be specified for SPAs that
572 * support multiple parity levels.
574 if (spa_version(spa
) >= SPA_VERSION_RAIDZ2
)
575 return (SET_ERROR(EINVAL
));
577 * Otherwise, we default to 1 parity device for RAID-Z.
584 ASSERT(nparity
!= -1ULL);
586 vd
= vdev_alloc_common(spa
, id
, guid
, ops
);
587 vic
= &vd
->vdev_indirect_config
;
589 vd
->vdev_islog
= islog
;
590 vd
->vdev_nparity
= nparity
;
592 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_PATH
, &vd
->vdev_path
) == 0)
593 vd
->vdev_path
= spa_strdup(vd
->vdev_path
);
594 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_DEVID
, &vd
->vdev_devid
) == 0)
595 vd
->vdev_devid
= spa_strdup(vd
->vdev_devid
);
596 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_PHYS_PATH
,
597 &vd
->vdev_physpath
) == 0)
598 vd
->vdev_physpath
= spa_strdup(vd
->vdev_physpath
);
599 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_FRU
, &vd
->vdev_fru
) == 0)
600 vd
->vdev_fru
= spa_strdup(vd
->vdev_fru
);
603 * Set the whole_disk property. If it's not specified, leave the value
606 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_WHOLE_DISK
,
607 &vd
->vdev_wholedisk
) != 0)
608 vd
->vdev_wholedisk
= -1ULL;
610 ASSERT0(vic
->vic_mapping_object
);
611 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_INDIRECT_OBJECT
,
612 &vic
->vic_mapping_object
);
613 ASSERT0(vic
->vic_births_object
);
614 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_INDIRECT_BIRTHS
,
615 &vic
->vic_births_object
);
616 ASSERT3U(vic
->vic_prev_indirect_vdev
, ==, UINT64_MAX
);
617 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_PREV_INDIRECT_VDEV
,
618 &vic
->vic_prev_indirect_vdev
);
621 * Look for the 'not present' flag. This will only be set if the device
622 * was not present at the time of import.
624 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_NOT_PRESENT
,
625 &vd
->vdev_not_present
);
628 * Get the alignment requirement.
630 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_ASHIFT
, &vd
->vdev_ashift
);
633 * Retrieve the vdev creation time.
635 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_CREATE_TXG
,
639 * If we're a top-level vdev, try to load the allocation parameters.
641 if (parent
&& !parent
->vdev_parent
&&
642 (alloctype
== VDEV_ALLOC_LOAD
|| alloctype
== VDEV_ALLOC_SPLIT
)) {
643 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_METASLAB_ARRAY
,
645 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_METASLAB_SHIFT
,
647 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_ASIZE
,
649 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_REMOVING
,
651 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_VDEV_TOP_ZAP
,
654 ASSERT0(vd
->vdev_top_zap
);
657 if (parent
&& !parent
->vdev_parent
&& alloctype
!= VDEV_ALLOC_ATTACH
) {
658 ASSERT(alloctype
== VDEV_ALLOC_LOAD
||
659 alloctype
== VDEV_ALLOC_ADD
||
660 alloctype
== VDEV_ALLOC_SPLIT
||
661 alloctype
== VDEV_ALLOC_ROOTPOOL
);
662 vd
->vdev_mg
= metaslab_group_create(islog
?
663 spa_log_class(spa
) : spa_normal_class(spa
), vd
,
664 spa
->spa_alloc_count
);
667 if (vd
->vdev_ops
->vdev_op_leaf
&&
668 (alloctype
== VDEV_ALLOC_LOAD
|| alloctype
== VDEV_ALLOC_SPLIT
)) {
669 (void) nvlist_lookup_uint64(nv
,
670 ZPOOL_CONFIG_VDEV_LEAF_ZAP
, &vd
->vdev_leaf_zap
);
672 ASSERT0(vd
->vdev_leaf_zap
);
676 * If we're a leaf vdev, try to load the DTL object and other state.
679 if (vd
->vdev_ops
->vdev_op_leaf
&&
680 (alloctype
== VDEV_ALLOC_LOAD
|| alloctype
== VDEV_ALLOC_L2CACHE
||
681 alloctype
== VDEV_ALLOC_ROOTPOOL
)) {
682 if (alloctype
== VDEV_ALLOC_LOAD
) {
683 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_DTL
,
684 &vd
->vdev_dtl_object
);
685 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_UNSPARE
,
689 if (alloctype
== VDEV_ALLOC_ROOTPOOL
) {
692 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_IS_SPARE
,
693 &spare
) == 0 && spare
)
697 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_OFFLINE
,
700 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_RESILVER_TXG
,
701 &vd
->vdev_resilver_txg
);
704 * When importing a pool, we want to ignore the persistent fault
705 * state, as the diagnosis made on another system may not be
706 * valid in the current context. Local vdevs will
707 * remain in the faulted state.
709 if (spa_load_state(spa
) == SPA_LOAD_OPEN
) {
710 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_FAULTED
,
712 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_DEGRADED
,
714 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_REMOVED
,
717 if (vd
->vdev_faulted
|| vd
->vdev_degraded
) {
721 VDEV_AUX_ERR_EXCEEDED
;
722 if (nvlist_lookup_string(nv
,
723 ZPOOL_CONFIG_AUX_STATE
, &aux
) == 0 &&
724 strcmp(aux
, "external") == 0)
725 vd
->vdev_label_aux
= VDEV_AUX_EXTERNAL
;
731 * Add ourselves to the parent's list of children.
733 vdev_add_child(parent
, vd
);
741 vdev_free(vdev_t
*vd
)
743 spa_t
*spa
= vd
->vdev_spa
;
744 ASSERT3P(vd
->vdev_initialize_thread
, ==, NULL
);
747 * vdev_free() implies closing the vdev first. This is simpler than
748 * trying to ensure complicated semantics for all callers.
752 ASSERT(!list_link_active(&vd
->vdev_config_dirty_node
));
753 ASSERT(!list_link_active(&vd
->vdev_state_dirty_node
));
758 for (int c
= 0; c
< vd
->vdev_children
; c
++)
759 vdev_free(vd
->vdev_child
[c
]);
761 ASSERT(vd
->vdev_child
== NULL
);
762 ASSERT(vd
->vdev_guid_sum
== vd
->vdev_guid
);
763 ASSERT(vd
->vdev_initialize_thread
== NULL
);
766 * Discard allocation state.
768 if (vd
->vdev_mg
!= NULL
) {
769 vdev_metaslab_fini(vd
);
770 metaslab_group_destroy(vd
->vdev_mg
);
773 ASSERT0(vd
->vdev_stat
.vs_space
);
774 ASSERT0(vd
->vdev_stat
.vs_dspace
);
775 ASSERT0(vd
->vdev_stat
.vs_alloc
);
778 * Remove this vdev from its parent's child list.
780 vdev_remove_child(vd
->vdev_parent
, vd
);
782 ASSERT(vd
->vdev_parent
== NULL
);
785 * Clean up vdev structure.
791 spa_strfree(vd
->vdev_path
);
793 spa_strfree(vd
->vdev_devid
);
794 if (vd
->vdev_physpath
)
795 spa_strfree(vd
->vdev_physpath
);
797 spa_strfree(vd
->vdev_fru
);
799 if (vd
->vdev_isspare
)
800 spa_spare_remove(vd
);
801 if (vd
->vdev_isl2cache
)
802 spa_l2cache_remove(vd
);
804 txg_list_destroy(&vd
->vdev_ms_list
);
805 txg_list_destroy(&vd
->vdev_dtl_list
);
807 mutex_enter(&vd
->vdev_dtl_lock
);
808 space_map_close(vd
->vdev_dtl_sm
);
809 for (int t
= 0; t
< DTL_TYPES
; t
++) {
810 range_tree_vacate(vd
->vdev_dtl
[t
], NULL
, NULL
);
811 range_tree_destroy(vd
->vdev_dtl
[t
]);
813 mutex_exit(&vd
->vdev_dtl_lock
);
815 EQUIV(vd
->vdev_indirect_births
!= NULL
,
816 vd
->vdev_indirect_mapping
!= NULL
);
817 if (vd
->vdev_indirect_births
!= NULL
) {
818 vdev_indirect_mapping_close(vd
->vdev_indirect_mapping
);
819 vdev_indirect_births_close(vd
->vdev_indirect_births
);
822 if (vd
->vdev_obsolete_sm
!= NULL
) {
823 ASSERT(vd
->vdev_removing
||
824 vd
->vdev_ops
== &vdev_indirect_ops
);
825 space_map_close(vd
->vdev_obsolete_sm
);
826 vd
->vdev_obsolete_sm
= NULL
;
828 range_tree_destroy(vd
->vdev_obsolete_segments
);
829 rw_destroy(&vd
->vdev_indirect_rwlock
);
830 mutex_destroy(&vd
->vdev_obsolete_lock
);
832 mutex_destroy(&vd
->vdev_queue_lock
);
833 mutex_destroy(&vd
->vdev_dtl_lock
);
834 mutex_destroy(&vd
->vdev_stat_lock
);
835 mutex_destroy(&vd
->vdev_probe_lock
);
836 mutex_destroy(&vd
->vdev_initialize_lock
);
837 mutex_destroy(&vd
->vdev_initialize_io_lock
);
838 cv_destroy(&vd
->vdev_initialize_io_cv
);
839 cv_destroy(&vd
->vdev_initialize_cv
);
841 if (vd
== spa
->spa_root_vdev
)
842 spa
->spa_root_vdev
= NULL
;
844 kmem_free(vd
, sizeof (vdev_t
));
848 * Transfer top-level vdev state from svd to tvd.
851 vdev_top_transfer(vdev_t
*svd
, vdev_t
*tvd
)
853 spa_t
*spa
= svd
->vdev_spa
;
858 ASSERT(tvd
== tvd
->vdev_top
);
860 tvd
->vdev_ms_array
= svd
->vdev_ms_array
;
861 tvd
->vdev_ms_shift
= svd
->vdev_ms_shift
;
862 tvd
->vdev_ms_count
= svd
->vdev_ms_count
;
863 tvd
->vdev_top_zap
= svd
->vdev_top_zap
;
865 svd
->vdev_ms_array
= 0;
866 svd
->vdev_ms_shift
= 0;
867 svd
->vdev_ms_count
= 0;
868 svd
->vdev_top_zap
= 0;
871 ASSERT3P(tvd
->vdev_mg
, ==, svd
->vdev_mg
);
872 tvd
->vdev_mg
= svd
->vdev_mg
;
873 tvd
->vdev_ms
= svd
->vdev_ms
;
878 if (tvd
->vdev_mg
!= NULL
)
879 tvd
->vdev_mg
->mg_vd
= tvd
;
881 tvd
->vdev_checkpoint_sm
= svd
->vdev_checkpoint_sm
;
882 svd
->vdev_checkpoint_sm
= NULL
;
884 tvd
->vdev_stat
.vs_alloc
= svd
->vdev_stat
.vs_alloc
;
885 tvd
->vdev_stat
.vs_space
= svd
->vdev_stat
.vs_space
;
886 tvd
->vdev_stat
.vs_dspace
= svd
->vdev_stat
.vs_dspace
;
888 svd
->vdev_stat
.vs_alloc
= 0;
889 svd
->vdev_stat
.vs_space
= 0;
890 svd
->vdev_stat
.vs_dspace
= 0;
893 * State which may be set on a top-level vdev that's in the
894 * process of being removed.
896 ASSERT0(tvd
->vdev_indirect_config
.vic_births_object
);
897 ASSERT0(tvd
->vdev_indirect_config
.vic_mapping_object
);
898 ASSERT3U(tvd
->vdev_indirect_config
.vic_prev_indirect_vdev
, ==, -1ULL);
899 ASSERT3P(tvd
->vdev_indirect_mapping
, ==, NULL
);
900 ASSERT3P(tvd
->vdev_indirect_births
, ==, NULL
);
901 ASSERT3P(tvd
->vdev_obsolete_sm
, ==, NULL
);
902 ASSERT0(tvd
->vdev_removing
);
903 tvd
->vdev_removing
= svd
->vdev_removing
;
904 tvd
->vdev_indirect_config
= svd
->vdev_indirect_config
;
905 tvd
->vdev_indirect_mapping
= svd
->vdev_indirect_mapping
;
906 tvd
->vdev_indirect_births
= svd
->vdev_indirect_births
;
907 range_tree_swap(&svd
->vdev_obsolete_segments
,
908 &tvd
->vdev_obsolete_segments
);
909 tvd
->vdev_obsolete_sm
= svd
->vdev_obsolete_sm
;
910 svd
->vdev_indirect_config
.vic_mapping_object
= 0;
911 svd
->vdev_indirect_config
.vic_births_object
= 0;
912 svd
->vdev_indirect_config
.vic_prev_indirect_vdev
= -1ULL;
913 svd
->vdev_indirect_mapping
= NULL
;
914 svd
->vdev_indirect_births
= NULL
;
915 svd
->vdev_obsolete_sm
= NULL
;
916 svd
->vdev_removing
= 0;
918 for (t
= 0; t
< TXG_SIZE
; t
++) {
919 while ((msp
= txg_list_remove(&svd
->vdev_ms_list
, t
)) != NULL
)
920 (void) txg_list_add(&tvd
->vdev_ms_list
, msp
, t
);
921 while ((vd
= txg_list_remove(&svd
->vdev_dtl_list
, t
)) != NULL
)
922 (void) txg_list_add(&tvd
->vdev_dtl_list
, vd
, t
);
923 if (txg_list_remove_this(&spa
->spa_vdev_txg_list
, svd
, t
))
924 (void) txg_list_add(&spa
->spa_vdev_txg_list
, tvd
, t
);
927 if (list_link_active(&svd
->vdev_config_dirty_node
)) {
928 vdev_config_clean(svd
);
929 vdev_config_dirty(tvd
);
932 if (list_link_active(&svd
->vdev_state_dirty_node
)) {
933 vdev_state_clean(svd
);
934 vdev_state_dirty(tvd
);
937 tvd
->vdev_deflate_ratio
= svd
->vdev_deflate_ratio
;
938 svd
->vdev_deflate_ratio
= 0;
940 tvd
->vdev_islog
= svd
->vdev_islog
;
945 vdev_top_update(vdev_t
*tvd
, vdev_t
*vd
)
952 for (int c
= 0; c
< vd
->vdev_children
; c
++)
953 vdev_top_update(tvd
, vd
->vdev_child
[c
]);
957 * Add a mirror/replacing vdev above an existing vdev.
960 vdev_add_parent(vdev_t
*cvd
, vdev_ops_t
*ops
)
962 spa_t
*spa
= cvd
->vdev_spa
;
963 vdev_t
*pvd
= cvd
->vdev_parent
;
966 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
968 mvd
= vdev_alloc_common(spa
, cvd
->vdev_id
, 0, ops
);
970 mvd
->vdev_asize
= cvd
->vdev_asize
;
971 mvd
->vdev_min_asize
= cvd
->vdev_min_asize
;
972 mvd
->vdev_max_asize
= cvd
->vdev_max_asize
;
973 mvd
->vdev_psize
= cvd
->vdev_psize
;
974 mvd
->vdev_ashift
= cvd
->vdev_ashift
;
975 mvd
->vdev_state
= cvd
->vdev_state
;
976 mvd
->vdev_crtxg
= cvd
->vdev_crtxg
;
978 vdev_remove_child(pvd
, cvd
);
979 vdev_add_child(pvd
, mvd
);
980 cvd
->vdev_id
= mvd
->vdev_children
;
981 vdev_add_child(mvd
, cvd
);
982 vdev_top_update(cvd
->vdev_top
, cvd
->vdev_top
);
984 if (mvd
== mvd
->vdev_top
)
985 vdev_top_transfer(cvd
, mvd
);
991 * Remove a 1-way mirror/replacing vdev from the tree.
994 vdev_remove_parent(vdev_t
*cvd
)
996 vdev_t
*mvd
= cvd
->vdev_parent
;
997 vdev_t
*pvd
= mvd
->vdev_parent
;
999 ASSERT(spa_config_held(cvd
->vdev_spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1001 ASSERT(mvd
->vdev_children
== 1);
1002 ASSERT(mvd
->vdev_ops
== &vdev_mirror_ops
||
1003 mvd
->vdev_ops
== &vdev_replacing_ops
||
1004 mvd
->vdev_ops
== &vdev_spare_ops
);
1005 cvd
->vdev_ashift
= mvd
->vdev_ashift
;
1007 vdev_remove_child(mvd
, cvd
);
1008 vdev_remove_child(pvd
, mvd
);
1011 * If cvd will replace mvd as a top-level vdev, preserve mvd's guid.
1012 * Otherwise, we could have detached an offline device, and when we
1013 * go to import the pool we'll think we have two top-level vdevs,
1014 * instead of a different version of the same top-level vdev.
1016 if (mvd
->vdev_top
== mvd
) {
1017 uint64_t guid_delta
= mvd
->vdev_guid
- cvd
->vdev_guid
;
1018 cvd
->vdev_orig_guid
= cvd
->vdev_guid
;
1019 cvd
->vdev_guid
+= guid_delta
;
1020 cvd
->vdev_guid_sum
+= guid_delta
;
1022 cvd
->vdev_id
= mvd
->vdev_id
;
1023 vdev_add_child(pvd
, cvd
);
1024 vdev_top_update(cvd
->vdev_top
, cvd
->vdev_top
);
1026 if (cvd
== cvd
->vdev_top
)
1027 vdev_top_transfer(mvd
, cvd
);
1029 ASSERT(mvd
->vdev_children
== 0);
1034 vdev_metaslab_init(vdev_t
*vd
, uint64_t txg
)
1036 spa_t
*spa
= vd
->vdev_spa
;
1037 objset_t
*mos
= spa
->spa_meta_objset
;
1039 uint64_t oldc
= vd
->vdev_ms_count
;
1040 uint64_t newc
= vd
->vdev_asize
>> vd
->vdev_ms_shift
;
1044 ASSERT(txg
== 0 || spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1047 * This vdev is not being allocated from yet or is a hole.
1049 if (vd
->vdev_ms_shift
== 0)
1052 ASSERT(!vd
->vdev_ishole
);
1054 ASSERT(oldc
<= newc
);
1056 mspp
= kmem_zalloc(newc
* sizeof (*mspp
), KM_SLEEP
);
1059 bcopy(vd
->vdev_ms
, mspp
, oldc
* sizeof (*mspp
));
1060 kmem_free(vd
->vdev_ms
, oldc
* sizeof (*mspp
));
1064 vd
->vdev_ms_count
= newc
;
1065 for (m
= oldc
; m
< newc
; m
++) {
1066 uint64_t object
= 0;
1069 * vdev_ms_array may be 0 if we are creating the "fake"
1070 * metaslabs for an indirect vdev for zdb's leak detection.
1071 * See zdb_leak_init().
1073 if (txg
== 0 && vd
->vdev_ms_array
!= 0) {
1074 error
= dmu_read(mos
, vd
->vdev_ms_array
,
1075 m
* sizeof (uint64_t), sizeof (uint64_t), &object
,
1078 vdev_dbgmsg(vd
, "unable to read the metaslab "
1079 "array [error=%d]", error
);
1084 error
= metaslab_init(vd
->vdev_mg
, m
, object
, txg
,
1087 vdev_dbgmsg(vd
, "metaslab_init failed [error=%d]",
1094 spa_config_enter(spa
, SCL_ALLOC
, FTAG
, RW_WRITER
);
1097 * If the vdev is being removed we don't activate
1098 * the metaslabs since we want to ensure that no new
1099 * allocations are performed on this device.
1101 if (oldc
== 0 && !vd
->vdev_removing
)
1102 metaslab_group_activate(vd
->vdev_mg
);
1105 spa_config_exit(spa
, SCL_ALLOC
, FTAG
);
1111 vdev_metaslab_fini(vdev_t
*vd
)
1113 if (vd
->vdev_checkpoint_sm
!= NULL
) {
1114 ASSERT(spa_feature_is_active(vd
->vdev_spa
,
1115 SPA_FEATURE_POOL_CHECKPOINT
));
1116 space_map_close(vd
->vdev_checkpoint_sm
);
1118 * Even though we close the space map, we need to set its
1119 * pointer to NULL. The reason is that vdev_metaslab_fini()
1120 * may be called multiple times for certain operations
1121 * (i.e. when destroying a pool) so we need to ensure that
1122 * this clause never executes twice. This logic is similar
1123 * to the one used for the vdev_ms clause below.
1125 vd
->vdev_checkpoint_sm
= NULL
;
1128 if (vd
->vdev_ms
!= NULL
) {
1129 uint64_t count
= vd
->vdev_ms_count
;
1131 metaslab_group_passivate(vd
->vdev_mg
);
1132 for (uint64_t m
= 0; m
< count
; m
++) {
1133 metaslab_t
*msp
= vd
->vdev_ms
[m
];
1138 kmem_free(vd
->vdev_ms
, count
* sizeof (metaslab_t
*));
1141 vd
->vdev_ms_count
= 0;
1143 ASSERT0(vd
->vdev_ms_count
);
1146 typedef struct vdev_probe_stats
{
1147 boolean_t vps_readable
;
1148 boolean_t vps_writeable
;
1150 } vdev_probe_stats_t
;
1153 vdev_probe_done(zio_t
*zio
)
1155 spa_t
*spa
= zio
->io_spa
;
1156 vdev_t
*vd
= zio
->io_vd
;
1157 vdev_probe_stats_t
*vps
= zio
->io_private
;
1159 ASSERT(vd
->vdev_probe_zio
!= NULL
);
1161 if (zio
->io_type
== ZIO_TYPE_READ
) {
1162 if (zio
->io_error
== 0)
1163 vps
->vps_readable
= 1;
1164 if (zio
->io_error
== 0 && spa_writeable(spa
)) {
1165 zio_nowait(zio_write_phys(vd
->vdev_probe_zio
, vd
,
1166 zio
->io_offset
, zio
->io_size
, zio
->io_abd
,
1167 ZIO_CHECKSUM_OFF
, vdev_probe_done
, vps
,
1168 ZIO_PRIORITY_SYNC_WRITE
, vps
->vps_flags
, B_TRUE
));
1170 abd_free(zio
->io_abd
);
1172 } else if (zio
->io_type
== ZIO_TYPE_WRITE
) {
1173 if (zio
->io_error
== 0)
1174 vps
->vps_writeable
= 1;
1175 abd_free(zio
->io_abd
);
1176 } else if (zio
->io_type
== ZIO_TYPE_NULL
) {
1179 vd
->vdev_cant_read
|= !vps
->vps_readable
;
1180 vd
->vdev_cant_write
|= !vps
->vps_writeable
;
1182 if (vdev_readable(vd
) &&
1183 (vdev_writeable(vd
) || !spa_writeable(spa
))) {
1186 ASSERT(zio
->io_error
!= 0);
1187 vdev_dbgmsg(vd
, "failed probe");
1188 zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE
,
1189 spa
, vd
, NULL
, 0, 0);
1190 zio
->io_error
= SET_ERROR(ENXIO
);
1193 mutex_enter(&vd
->vdev_probe_lock
);
1194 ASSERT(vd
->vdev_probe_zio
== zio
);
1195 vd
->vdev_probe_zio
= NULL
;
1196 mutex_exit(&vd
->vdev_probe_lock
);
1198 zio_link_t
*zl
= NULL
;
1199 while ((pio
= zio_walk_parents(zio
, &zl
)) != NULL
)
1200 if (!vdev_accessible(vd
, pio
))
1201 pio
->io_error
= SET_ERROR(ENXIO
);
1203 kmem_free(vps
, sizeof (*vps
));
1208 * Determine whether this device is accessible.
1210 * Read and write to several known locations: the pad regions of each
1211 * vdev label but the first, which we leave alone in case it contains
1215 vdev_probe(vdev_t
*vd
, zio_t
*zio
)
1217 spa_t
*spa
= vd
->vdev_spa
;
1218 vdev_probe_stats_t
*vps
= NULL
;
1221 ASSERT(vd
->vdev_ops
->vdev_op_leaf
);
1224 * Don't probe the probe.
1226 if (zio
&& (zio
->io_flags
& ZIO_FLAG_PROBE
))
1230 * To prevent 'probe storms' when a device fails, we create
1231 * just one probe i/o at a time. All zios that want to probe
1232 * this vdev will become parents of the probe io.
1234 mutex_enter(&vd
->vdev_probe_lock
);
1236 if ((pio
= vd
->vdev_probe_zio
) == NULL
) {
1237 vps
= kmem_zalloc(sizeof (*vps
), KM_SLEEP
);
1239 vps
->vps_flags
= ZIO_FLAG_CANFAIL
| ZIO_FLAG_PROBE
|
1240 ZIO_FLAG_DONT_CACHE
| ZIO_FLAG_DONT_AGGREGATE
|
1243 if (spa_config_held(spa
, SCL_ZIO
, RW_WRITER
)) {
1245 * vdev_cant_read and vdev_cant_write can only
1246 * transition from TRUE to FALSE when we have the
1247 * SCL_ZIO lock as writer; otherwise they can only
1248 * transition from FALSE to TRUE. This ensures that
1249 * any zio looking at these values can assume that
1250 * failures persist for the life of the I/O. That's
1251 * important because when a device has intermittent
1252 * connectivity problems, we want to ensure that
1253 * they're ascribed to the device (ENXIO) and not
1256 * Since we hold SCL_ZIO as writer here, clear both
1257 * values so the probe can reevaluate from first
1260 vps
->vps_flags
|= ZIO_FLAG_CONFIG_WRITER
;
1261 vd
->vdev_cant_read
= B_FALSE
;
1262 vd
->vdev_cant_write
= B_FALSE
;
1265 vd
->vdev_probe_zio
= pio
= zio_null(NULL
, spa
, vd
,
1266 vdev_probe_done
, vps
,
1267 vps
->vps_flags
| ZIO_FLAG_DONT_PROPAGATE
);
1270 * We can't change the vdev state in this context, so we
1271 * kick off an async task to do it on our behalf.
1274 vd
->vdev_probe_wanted
= B_TRUE
;
1275 spa_async_request(spa
, SPA_ASYNC_PROBE
);
1280 zio_add_child(zio
, pio
);
1282 mutex_exit(&vd
->vdev_probe_lock
);
1285 ASSERT(zio
!= NULL
);
1289 for (int l
= 1; l
< VDEV_LABELS
; l
++) {
1290 zio_nowait(zio_read_phys(pio
, vd
,
1291 vdev_label_offset(vd
->vdev_psize
, l
,
1292 offsetof(vdev_label_t
, vl_pad2
)), VDEV_PAD_SIZE
,
1293 abd_alloc_for_io(VDEV_PAD_SIZE
, B_TRUE
),
1294 ZIO_CHECKSUM_OFF
, vdev_probe_done
, vps
,
1295 ZIO_PRIORITY_SYNC_READ
, vps
->vps_flags
, B_TRUE
));
1306 vdev_open_child(void *arg
)
1310 vd
->vdev_open_thread
= curthread
;
1311 vd
->vdev_open_error
= vdev_open(vd
);
1312 vd
->vdev_open_thread
= NULL
;
1316 vdev_uses_zvols(vdev_t
*vd
)
1318 if (vd
->vdev_path
&& strncmp(vd
->vdev_path
, ZVOL_DIR
,
1319 strlen(ZVOL_DIR
)) == 0)
1321 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1322 if (vdev_uses_zvols(vd
->vdev_child
[c
]))
1328 vdev_open_children(vdev_t
*vd
)
1331 int children
= vd
->vdev_children
;
1334 * in order to handle pools on top of zvols, do the opens
1335 * in a single thread so that the same thread holds the
1336 * spa_namespace_lock
1338 if (vdev_uses_zvols(vd
)) {
1339 for (int c
= 0; c
< children
; c
++)
1340 vd
->vdev_child
[c
]->vdev_open_error
=
1341 vdev_open(vd
->vdev_child
[c
]);
1344 tq
= taskq_create("vdev_open", children
, minclsyspri
,
1345 children
, children
, TASKQ_PREPOPULATE
);
1347 for (int c
= 0; c
< children
; c
++)
1348 VERIFY(taskq_dispatch(tq
, vdev_open_child
, vd
->vdev_child
[c
],
1355 * Compute the raidz-deflation ratio. Note, we hard-code
1356 * in 128k (1 << 17) because it is the "typical" blocksize.
1357 * Even though SPA_MAXBLOCKSIZE changed, this algorithm can not change,
1358 * otherwise it would inconsistently account for existing bp's.
1361 vdev_set_deflate_ratio(vdev_t
*vd
)
1363 if (vd
== vd
->vdev_top
&& !vd
->vdev_ishole
&& vd
->vdev_ashift
!= 0) {
1364 vd
->vdev_deflate_ratio
= (1 << 17) /
1365 (vdev_psize_to_asize(vd
, 1 << 17) >> SPA_MINBLOCKSHIFT
);
1370 * Prepare a virtual device for access.
1373 vdev_open(vdev_t
*vd
)
1375 spa_t
*spa
= vd
->vdev_spa
;
1378 uint64_t max_osize
= 0;
1379 uint64_t asize
, max_asize
, psize
;
1380 uint64_t ashift
= 0;
1382 ASSERT(vd
->vdev_open_thread
== curthread
||
1383 spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
1384 ASSERT(vd
->vdev_state
== VDEV_STATE_CLOSED
||
1385 vd
->vdev_state
== VDEV_STATE_CANT_OPEN
||
1386 vd
->vdev_state
== VDEV_STATE_OFFLINE
);
1388 vd
->vdev_stat
.vs_aux
= VDEV_AUX_NONE
;
1389 vd
->vdev_cant_read
= B_FALSE
;
1390 vd
->vdev_cant_write
= B_FALSE
;
1391 vd
->vdev_min_asize
= vdev_get_min_asize(vd
);
1394 * If this vdev is not removed, check its fault status. If it's
1395 * faulted, bail out of the open.
1397 if (!vd
->vdev_removed
&& vd
->vdev_faulted
) {
1398 ASSERT(vd
->vdev_children
== 0);
1399 ASSERT(vd
->vdev_label_aux
== VDEV_AUX_ERR_EXCEEDED
||
1400 vd
->vdev_label_aux
== VDEV_AUX_EXTERNAL
);
1401 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_FAULTED
,
1402 vd
->vdev_label_aux
);
1403 return (SET_ERROR(ENXIO
));
1404 } else if (vd
->vdev_offline
) {
1405 ASSERT(vd
->vdev_children
== 0);
1406 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_OFFLINE
, VDEV_AUX_NONE
);
1407 return (SET_ERROR(ENXIO
));
1410 error
= vd
->vdev_ops
->vdev_op_open(vd
, &osize
, &max_osize
, &ashift
);
1413 * Reset the vdev_reopening flag so that we actually close
1414 * the vdev on error.
1416 vd
->vdev_reopening
= B_FALSE
;
1417 if (zio_injection_enabled
&& error
== 0)
1418 error
= zio_handle_device_injection(vd
, NULL
, ENXIO
);
1421 if (vd
->vdev_removed
&&
1422 vd
->vdev_stat
.vs_aux
!= VDEV_AUX_OPEN_FAILED
)
1423 vd
->vdev_removed
= B_FALSE
;
1425 if (vd
->vdev_stat
.vs_aux
== VDEV_AUX_CHILDREN_OFFLINE
) {
1426 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_OFFLINE
,
1427 vd
->vdev_stat
.vs_aux
);
1429 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1430 vd
->vdev_stat
.vs_aux
);
1435 vd
->vdev_removed
= B_FALSE
;
1438 * Recheck the faulted flag now that we have confirmed that
1439 * the vdev is accessible. If we're faulted, bail.
1441 if (vd
->vdev_faulted
) {
1442 ASSERT(vd
->vdev_children
== 0);
1443 ASSERT(vd
->vdev_label_aux
== VDEV_AUX_ERR_EXCEEDED
||
1444 vd
->vdev_label_aux
== VDEV_AUX_EXTERNAL
);
1445 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_FAULTED
,
1446 vd
->vdev_label_aux
);
1447 return (SET_ERROR(ENXIO
));
1450 if (vd
->vdev_degraded
) {
1451 ASSERT(vd
->vdev_children
== 0);
1452 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_DEGRADED
,
1453 VDEV_AUX_ERR_EXCEEDED
);
1455 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_HEALTHY
, 0);
1459 * For hole or missing vdevs we just return success.
1461 if (vd
->vdev_ishole
|| vd
->vdev_ops
== &vdev_missing_ops
)
1464 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
1465 if (vd
->vdev_child
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
) {
1466 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_DEGRADED
,
1472 osize
= P2ALIGN(osize
, (uint64_t)sizeof (vdev_label_t
));
1473 max_osize
= P2ALIGN(max_osize
, (uint64_t)sizeof (vdev_label_t
));
1475 if (vd
->vdev_children
== 0) {
1476 if (osize
< SPA_MINDEVSIZE
) {
1477 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1478 VDEV_AUX_TOO_SMALL
);
1479 return (SET_ERROR(EOVERFLOW
));
1482 asize
= osize
- (VDEV_LABEL_START_SIZE
+ VDEV_LABEL_END_SIZE
);
1483 max_asize
= max_osize
- (VDEV_LABEL_START_SIZE
+
1484 VDEV_LABEL_END_SIZE
);
1486 if (vd
->vdev_parent
!= NULL
&& osize
< SPA_MINDEVSIZE
-
1487 (VDEV_LABEL_START_SIZE
+ VDEV_LABEL_END_SIZE
)) {
1488 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1489 VDEV_AUX_TOO_SMALL
);
1490 return (SET_ERROR(EOVERFLOW
));
1494 max_asize
= max_osize
;
1497 vd
->vdev_psize
= psize
;
1500 * Make sure the allocatable size hasn't shrunk too much.
1502 if (asize
< vd
->vdev_min_asize
) {
1503 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1504 VDEV_AUX_BAD_LABEL
);
1505 return (SET_ERROR(EINVAL
));
1508 if (vd
->vdev_asize
== 0) {
1510 * This is the first-ever open, so use the computed values.
1511 * For testing purposes, a higher ashift can be requested.
1513 vd
->vdev_asize
= asize
;
1514 vd
->vdev_max_asize
= max_asize
;
1515 vd
->vdev_ashift
= MAX(ashift
, vd
->vdev_ashift
);
1516 vd
->vdev_ashift
= MAX(zfs_ashift_min
, vd
->vdev_ashift
);
1519 * Detect if the alignment requirement has increased.
1520 * We don't want to make the pool unavailable, just
1521 * issue a warning instead.
1523 if (ashift
> vd
->vdev_top
->vdev_ashift
&&
1524 vd
->vdev_ops
->vdev_op_leaf
) {
1526 "Disk, '%s', has a block alignment that is "
1527 "larger than the pool's alignment\n",
1530 vd
->vdev_max_asize
= max_asize
;
1534 * If all children are healthy we update asize if either:
1535 * The asize has increased, due to a device expansion caused by dynamic
1536 * LUN growth or vdev replacement, and automatic expansion is enabled;
1537 * making the additional space available.
1539 * The asize has decreased, due to a device shrink usually caused by a
1540 * vdev replace with a smaller device. This ensures that calculations
1541 * based of max_asize and asize e.g. esize are always valid. It's safe
1542 * to do this as we've already validated that asize is greater than
1545 if (vd
->vdev_state
== VDEV_STATE_HEALTHY
&&
1546 ((asize
> vd
->vdev_asize
&&
1547 (vd
->vdev_expanding
|| spa
->spa_autoexpand
)) ||
1548 (asize
< vd
->vdev_asize
)))
1549 vd
->vdev_asize
= asize
;
1551 vdev_set_min_asize(vd
);
1554 * Ensure we can issue some IO before declaring the
1555 * vdev open for business.
1557 if (vd
->vdev_ops
->vdev_op_leaf
&&
1558 (error
= zio_wait(vdev_probe(vd
, NULL
))) != 0) {
1559 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_FAULTED
,
1560 VDEV_AUX_ERR_EXCEEDED
);
1565 * Track the min and max ashift values for normal data devices.
1567 if (vd
->vdev_top
== vd
&& vd
->vdev_ashift
!= 0 &&
1568 !vd
->vdev_islog
&& vd
->vdev_aux
== NULL
) {
1569 if (vd
->vdev_ashift
> spa
->spa_max_ashift
)
1570 spa
->spa_max_ashift
= vd
->vdev_ashift
;
1571 if (vd
->vdev_ashift
< spa
->spa_min_ashift
)
1572 spa
->spa_min_ashift
= vd
->vdev_ashift
;
1576 * If a leaf vdev has a DTL, and seems healthy, then kick off a
1577 * resilver. But don't do this if we are doing a reopen for a scrub,
1578 * since this would just restart the scrub we are already doing.
1580 if (vd
->vdev_ops
->vdev_op_leaf
&& !spa
->spa_scrub_reopen
&&
1581 vdev_resilver_needed(vd
, NULL
, NULL
))
1582 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
1588 * Called once the vdevs are all opened, this routine validates the label
1589 * contents. This needs to be done before vdev_load() so that we don't
1590 * inadvertently do repair I/Os to the wrong device.
1592 * This function will only return failure if one of the vdevs indicates that it
1593 * has since been destroyed or exported. This is only possible if
1594 * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state
1595 * will be updated but the function will return 0.
1598 vdev_validate(vdev_t
*vd
)
1600 spa_t
*spa
= vd
->vdev_spa
;
1602 uint64_t guid
= 0, aux_guid
= 0, top_guid
;
1607 if (vdev_validate_skip
)
1610 for (uint64_t c
= 0; c
< vd
->vdev_children
; c
++)
1611 if (vdev_validate(vd
->vdev_child
[c
]) != 0)
1612 return (SET_ERROR(EBADF
));
1615 * If the device has already failed, or was marked offline, don't do
1616 * any further validation. Otherwise, label I/O will fail and we will
1617 * overwrite the previous state.
1619 if (!vd
->vdev_ops
->vdev_op_leaf
|| !vdev_readable(vd
))
1623 * If we are performing an extreme rewind, we allow for a label that
1624 * was modified at a point after the current txg.
1625 * If config lock is not held do not check for the txg. spa_sync could
1626 * be updating the vdev's label before updating spa_last_synced_txg.
1628 if (spa
->spa_extreme_rewind
|| spa_last_synced_txg(spa
) == 0 ||
1629 spa_config_held(spa
, SCL_CONFIG
, RW_WRITER
) != SCL_CONFIG
)
1632 txg
= spa_last_synced_txg(spa
);
1634 if ((label
= vdev_label_read_config(vd
, txg
)) == NULL
) {
1635 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1636 VDEV_AUX_BAD_LABEL
);
1637 vdev_dbgmsg(vd
, "vdev_validate: failed reading config for "
1638 "txg %llu", (u_longlong_t
)txg
);
1643 * Determine if this vdev has been split off into another
1644 * pool. If so, then refuse to open it.
1646 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_SPLIT_GUID
,
1647 &aux_guid
) == 0 && aux_guid
== spa_guid(spa
)) {
1648 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1649 VDEV_AUX_SPLIT_POOL
);
1651 vdev_dbgmsg(vd
, "vdev_validate: vdev split into other pool");
1655 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_GUID
, &guid
) != 0) {
1656 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1657 VDEV_AUX_CORRUPT_DATA
);
1659 vdev_dbgmsg(vd
, "vdev_validate: '%s' missing from label",
1660 ZPOOL_CONFIG_POOL_GUID
);
1665 * If config is not trusted then ignore the spa guid check. This is
1666 * necessary because if the machine crashed during a re-guid the new
1667 * guid might have been written to all of the vdev labels, but not the
1668 * cached config. The check will be performed again once we have the
1669 * trusted config from the MOS.
1671 if (spa
->spa_trust_config
&& guid
!= spa_guid(spa
)) {
1672 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1673 VDEV_AUX_CORRUPT_DATA
);
1675 vdev_dbgmsg(vd
, "vdev_validate: vdev label pool_guid doesn't "
1676 "match config (%llu != %llu)", (u_longlong_t
)guid
,
1677 (u_longlong_t
)spa_guid(spa
));
1681 if (nvlist_lookup_nvlist(label
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
)
1682 != 0 || nvlist_lookup_uint64(nvl
, ZPOOL_CONFIG_ORIG_GUID
,
1686 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_GUID
, &guid
) != 0) {
1687 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1688 VDEV_AUX_CORRUPT_DATA
);
1690 vdev_dbgmsg(vd
, "vdev_validate: '%s' missing from label",
1695 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_TOP_GUID
, &top_guid
)
1697 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1698 VDEV_AUX_CORRUPT_DATA
);
1700 vdev_dbgmsg(vd
, "vdev_validate: '%s' missing from label",
1701 ZPOOL_CONFIG_TOP_GUID
);
1706 * If this vdev just became a top-level vdev because its sibling was
1707 * detached, it will have adopted the parent's vdev guid -- but the
1708 * label may or may not be on disk yet. Fortunately, either version
1709 * of the label will have the same top guid, so if we're a top-level
1710 * vdev, we can safely compare to that instead.
1711 * However, if the config comes from a cachefile that failed to update
1712 * after the detach, a top-level vdev will appear as a non top-level
1713 * vdev in the config. Also relax the constraints if we perform an
1716 * If we split this vdev off instead, then we also check the
1717 * original pool's guid. We don't want to consider the vdev
1718 * corrupt if it is partway through a split operation.
1720 if (vd
->vdev_guid
!= guid
&& vd
->vdev_guid
!= aux_guid
) {
1721 boolean_t mismatch
= B_FALSE
;
1722 if (spa
->spa_trust_config
&& !spa
->spa_extreme_rewind
) {
1723 if (vd
!= vd
->vdev_top
|| vd
->vdev_guid
!= top_guid
)
1726 if (vd
->vdev_guid
!= top_guid
&&
1727 vd
->vdev_top
->vdev_guid
!= guid
)
1732 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1733 VDEV_AUX_CORRUPT_DATA
);
1735 vdev_dbgmsg(vd
, "vdev_validate: config guid "
1736 "doesn't match label guid");
1737 vdev_dbgmsg(vd
, "CONFIG: guid %llu, top_guid %llu",
1738 (u_longlong_t
)vd
->vdev_guid
,
1739 (u_longlong_t
)vd
->vdev_top
->vdev_guid
);
1740 vdev_dbgmsg(vd
, "LABEL: guid %llu, top_guid %llu, "
1741 "aux_guid %llu", (u_longlong_t
)guid
,
1742 (u_longlong_t
)top_guid
, (u_longlong_t
)aux_guid
);
1747 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_STATE
,
1749 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1750 VDEV_AUX_CORRUPT_DATA
);
1752 vdev_dbgmsg(vd
, "vdev_validate: '%s' missing from label",
1753 ZPOOL_CONFIG_POOL_STATE
);
1760 * If this is a verbatim import, no need to check the
1761 * state of the pool.
1763 if (!(spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) &&
1764 spa_load_state(spa
) == SPA_LOAD_OPEN
&&
1765 state
!= POOL_STATE_ACTIVE
) {
1766 vdev_dbgmsg(vd
, "vdev_validate: invalid pool state (%llu) "
1767 "for spa %s", (u_longlong_t
)state
, spa
->spa_name
);
1768 return (SET_ERROR(EBADF
));
1772 * If we were able to open and validate a vdev that was
1773 * previously marked permanently unavailable, clear that state
1776 if (vd
->vdev_not_present
)
1777 vd
->vdev_not_present
= 0;
1783 vdev_copy_path_impl(vdev_t
*svd
, vdev_t
*dvd
)
1785 if (svd
->vdev_path
!= NULL
&& dvd
->vdev_path
!= NULL
) {
1786 if (strcmp(svd
->vdev_path
, dvd
->vdev_path
) != 0) {
1787 zfs_dbgmsg("vdev_copy_path: vdev %llu: path changed "
1788 "from '%s' to '%s'", (u_longlong_t
)dvd
->vdev_guid
,
1789 dvd
->vdev_path
, svd
->vdev_path
);
1790 spa_strfree(dvd
->vdev_path
);
1791 dvd
->vdev_path
= spa_strdup(svd
->vdev_path
);
1793 } else if (svd
->vdev_path
!= NULL
) {
1794 dvd
->vdev_path
= spa_strdup(svd
->vdev_path
);
1795 zfs_dbgmsg("vdev_copy_path: vdev %llu: path set to '%s'",
1796 (u_longlong_t
)dvd
->vdev_guid
, dvd
->vdev_path
);
1801 * Recursively copy vdev paths from one vdev to another. Source and destination
1802 * vdev trees must have same geometry otherwise return error. Intended to copy
1803 * paths from userland config into MOS config.
1806 vdev_copy_path_strict(vdev_t
*svd
, vdev_t
*dvd
)
1808 if ((svd
->vdev_ops
== &vdev_missing_ops
) ||
1809 (svd
->vdev_ishole
&& dvd
->vdev_ishole
) ||
1810 (dvd
->vdev_ops
== &vdev_indirect_ops
))
1813 if (svd
->vdev_ops
!= dvd
->vdev_ops
) {
1814 vdev_dbgmsg(svd
, "vdev_copy_path: vdev type mismatch: %s != %s",
1815 svd
->vdev_ops
->vdev_op_type
, dvd
->vdev_ops
->vdev_op_type
);
1816 return (SET_ERROR(EINVAL
));
1819 if (svd
->vdev_guid
!= dvd
->vdev_guid
) {
1820 vdev_dbgmsg(svd
, "vdev_copy_path: guids mismatch (%llu != "
1821 "%llu)", (u_longlong_t
)svd
->vdev_guid
,
1822 (u_longlong_t
)dvd
->vdev_guid
);
1823 return (SET_ERROR(EINVAL
));
1826 if (svd
->vdev_children
!= dvd
->vdev_children
) {
1827 vdev_dbgmsg(svd
, "vdev_copy_path: children count mismatch: "
1828 "%llu != %llu", (u_longlong_t
)svd
->vdev_children
,
1829 (u_longlong_t
)dvd
->vdev_children
);
1830 return (SET_ERROR(EINVAL
));
1833 for (uint64_t i
= 0; i
< svd
->vdev_children
; i
++) {
1834 int error
= vdev_copy_path_strict(svd
->vdev_child
[i
],
1835 dvd
->vdev_child
[i
]);
1840 if (svd
->vdev_ops
->vdev_op_leaf
)
1841 vdev_copy_path_impl(svd
, dvd
);
1847 vdev_copy_path_search(vdev_t
*stvd
, vdev_t
*dvd
)
1849 ASSERT(stvd
->vdev_top
== stvd
);
1850 ASSERT3U(stvd
->vdev_id
, ==, dvd
->vdev_top
->vdev_id
);
1852 for (uint64_t i
= 0; i
< dvd
->vdev_children
; i
++) {
1853 vdev_copy_path_search(stvd
, dvd
->vdev_child
[i
]);
1856 if (!dvd
->vdev_ops
->vdev_op_leaf
|| !vdev_is_concrete(dvd
))
1860 * The idea here is that while a vdev can shift positions within
1861 * a top vdev (when replacing, attaching mirror, etc.) it cannot
1862 * step outside of it.
1864 vdev_t
*vd
= vdev_lookup_by_guid(stvd
, dvd
->vdev_guid
);
1866 if (vd
== NULL
|| vd
->vdev_ops
!= dvd
->vdev_ops
)
1869 ASSERT(vd
->vdev_ops
->vdev_op_leaf
);
1871 vdev_copy_path_impl(vd
, dvd
);
1875 * Recursively copy vdev paths from one root vdev to another. Source and
1876 * destination vdev trees may differ in geometry. For each destination leaf
1877 * vdev, search a vdev with the same guid and top vdev id in the source.
1878 * Intended to copy paths from userland config into MOS config.
1881 vdev_copy_path_relaxed(vdev_t
*srvd
, vdev_t
*drvd
)
1883 uint64_t children
= MIN(srvd
->vdev_children
, drvd
->vdev_children
);
1884 ASSERT(srvd
->vdev_ops
== &vdev_root_ops
);
1885 ASSERT(drvd
->vdev_ops
== &vdev_root_ops
);
1887 for (uint64_t i
= 0; i
< children
; i
++) {
1888 vdev_copy_path_search(srvd
->vdev_child
[i
],
1889 drvd
->vdev_child
[i
]);
1894 * Close a virtual device.
1897 vdev_close(vdev_t
*vd
)
1899 spa_t
*spa
= vd
->vdev_spa
;
1900 vdev_t
*pvd
= vd
->vdev_parent
;
1902 ASSERT(spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
1905 * If our parent is reopening, then we are as well, unless we are
1908 if (pvd
!= NULL
&& pvd
->vdev_reopening
)
1909 vd
->vdev_reopening
= (pvd
->vdev_reopening
&& !vd
->vdev_offline
);
1911 vd
->vdev_ops
->vdev_op_close(vd
);
1913 vdev_cache_purge(vd
);
1916 * We record the previous state before we close it, so that if we are
1917 * doing a reopen(), we don't generate FMA ereports if we notice that
1918 * it's still faulted.
1920 vd
->vdev_prevstate
= vd
->vdev_state
;
1922 if (vd
->vdev_offline
)
1923 vd
->vdev_state
= VDEV_STATE_OFFLINE
;
1925 vd
->vdev_state
= VDEV_STATE_CLOSED
;
1926 vd
->vdev_stat
.vs_aux
= VDEV_AUX_NONE
;
1930 vdev_hold(vdev_t
*vd
)
1932 spa_t
*spa
= vd
->vdev_spa
;
1934 ASSERT(spa_is_root(spa
));
1935 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
)
1938 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1939 vdev_hold(vd
->vdev_child
[c
]);
1941 if (vd
->vdev_ops
->vdev_op_leaf
)
1942 vd
->vdev_ops
->vdev_op_hold(vd
);
1946 vdev_rele(vdev_t
*vd
)
1948 spa_t
*spa
= vd
->vdev_spa
;
1950 ASSERT(spa_is_root(spa
));
1951 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1952 vdev_rele(vd
->vdev_child
[c
]);
1954 if (vd
->vdev_ops
->vdev_op_leaf
)
1955 vd
->vdev_ops
->vdev_op_rele(vd
);
1959 * Reopen all interior vdevs and any unopened leaves. We don't actually
1960 * reopen leaf vdevs which had previously been opened as they might deadlock
1961 * on the spa_config_lock. Instead we only obtain the leaf's physical size.
1962 * If the leaf has never been opened then open it, as usual.
1965 vdev_reopen(vdev_t
*vd
)
1967 spa_t
*spa
= vd
->vdev_spa
;
1969 ASSERT(spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
1971 /* set the reopening flag unless we're taking the vdev offline */
1972 vd
->vdev_reopening
= !vd
->vdev_offline
;
1974 (void) vdev_open(vd
);
1977 * Call vdev_validate() here to make sure we have the same device.
1978 * Otherwise, a device with an invalid label could be successfully
1979 * opened in response to vdev_reopen().
1982 (void) vdev_validate_aux(vd
);
1983 if (vdev_readable(vd
) && vdev_writeable(vd
) &&
1984 vd
->vdev_aux
== &spa
->spa_l2cache
&&
1985 !l2arc_vdev_present(vd
))
1986 l2arc_add_vdev(spa
, vd
);
1988 (void) vdev_validate(vd
);
1992 * Reassess parent vdev's health.
1994 vdev_propagate_state(vd
);
1998 vdev_create(vdev_t
*vd
, uint64_t txg
, boolean_t isreplacing
)
2003 * Normally, partial opens (e.g. of a mirror) are allowed.
2004 * For a create, however, we want to fail the request if
2005 * there are any components we can't open.
2007 error
= vdev_open(vd
);
2009 if (error
|| vd
->vdev_state
!= VDEV_STATE_HEALTHY
) {
2011 return (error
? error
: ENXIO
);
2015 * Recursively load DTLs and initialize all labels.
2017 if ((error
= vdev_dtl_load(vd
)) != 0 ||
2018 (error
= vdev_label_init(vd
, txg
, isreplacing
?
2019 VDEV_LABEL_REPLACE
: VDEV_LABEL_CREATE
)) != 0) {
2028 vdev_metaslab_set_size(vdev_t
*vd
)
2030 uint64_t asize
= vd
->vdev_asize
;
2031 uint64_t ms_shift
= 0;
2034 * For vdevs that are bigger than 8G the metaslab size varies in
2035 * a way that the number of metaslabs increases in powers of two,
2036 * linearly in terms of vdev_asize, starting from 16 metaslabs.
2037 * So for vdev_asize of 8G we get 16 metaslabs, for 16G, we get 32,
2038 * and so on, until we hit the maximum metaslab count limit
2039 * [vdev_max_ms_count] from which point the metaslab count stays
2042 ms_shift
= vdev_default_ms_shift
;
2044 if ((asize
>> ms_shift
) < vdev_min_ms_count
) {
2046 * For devices that are less than 8G we want to have
2047 * exactly 16 metaslabs. We don't want less as integer
2048 * division rounds down, so less metaslabs mean more
2049 * wasted space. We don't want more as these vdevs are
2050 * small and in the likely event that we are running
2051 * out of space, the SPA will have a hard time finding
2052 * space due to fragmentation.
2054 ms_shift
= highbit64(asize
/ vdev_min_ms_count
);
2055 ms_shift
= MAX(ms_shift
, SPA_MAXBLOCKSHIFT
);
2057 } else if ((asize
>> ms_shift
) > vdev_max_ms_count
) {
2058 ms_shift
= highbit64(asize
/ vdev_max_ms_count
);
2061 vd
->vdev_ms_shift
= ms_shift
;
2062 ASSERT3U(vd
->vdev_ms_shift
, >=, SPA_MAXBLOCKSHIFT
);
2066 vdev_dirty(vdev_t
*vd
, int flags
, void *arg
, uint64_t txg
)
2068 ASSERT(vd
== vd
->vdev_top
);
2069 /* indirect vdevs don't have metaslabs or dtls */
2070 ASSERT(vdev_is_concrete(vd
) || flags
== 0);
2071 ASSERT(ISP2(flags
));
2072 ASSERT(spa_writeable(vd
->vdev_spa
));
2074 if (flags
& VDD_METASLAB
)
2075 (void) txg_list_add(&vd
->vdev_ms_list
, arg
, txg
);
2077 if (flags
& VDD_DTL
)
2078 (void) txg_list_add(&vd
->vdev_dtl_list
, arg
, txg
);
2080 (void) txg_list_add(&vd
->vdev_spa
->spa_vdev_txg_list
, vd
, txg
);
2084 vdev_dirty_leaves(vdev_t
*vd
, int flags
, uint64_t txg
)
2086 for (int c
= 0; c
< vd
->vdev_children
; c
++)
2087 vdev_dirty_leaves(vd
->vdev_child
[c
], flags
, txg
);
2089 if (vd
->vdev_ops
->vdev_op_leaf
)
2090 vdev_dirty(vd
->vdev_top
, flags
, vd
, txg
);
2096 * A vdev's DTL (dirty time log) is the set of transaction groups for which
2097 * the vdev has less than perfect replication. There are four kinds of DTL:
2099 * DTL_MISSING: txgs for which the vdev has no valid copies of the data
2101 * DTL_PARTIAL: txgs for which data is available, but not fully replicated
2103 * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon
2104 * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of
2105 * txgs that was scrubbed.
2107 * DTL_OUTAGE: txgs which cannot currently be read, whether due to
2108 * persistent errors or just some device being offline.
2109 * Unlike the other three, the DTL_OUTAGE map is not generally
2110 * maintained; it's only computed when needed, typically to
2111 * determine whether a device can be detached.
2113 * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device
2114 * either has the data or it doesn't.
2116 * For interior vdevs such as mirror and RAID-Z the picture is more complex.
2117 * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because
2118 * if any child is less than fully replicated, then so is its parent.
2119 * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs,
2120 * comprising only those txgs which appear in 'maxfaults' or more children;
2121 * those are the txgs we don't have enough replication to read. For example,
2122 * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2);
2123 * thus, its DTL_MISSING consists of the set of txgs that appear in more than
2124 * two child DTL_MISSING maps.
2126 * It should be clear from the above that to compute the DTLs and outage maps
2127 * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps.
2128 * Therefore, that is all we keep on disk. When loading the pool, or after
2129 * a configuration change, we generate all other DTLs from first principles.
2132 vdev_dtl_dirty(vdev_t
*vd
, vdev_dtl_type_t t
, uint64_t txg
, uint64_t size
)
2134 range_tree_t
*rt
= vd
->vdev_dtl
[t
];
2136 ASSERT(t
< DTL_TYPES
);
2137 ASSERT(vd
!= vd
->vdev_spa
->spa_root_vdev
);
2138 ASSERT(spa_writeable(vd
->vdev_spa
));
2140 mutex_enter(&vd
->vdev_dtl_lock
);
2141 if (!range_tree_contains(rt
, txg
, size
))
2142 range_tree_add(rt
, txg
, size
);
2143 mutex_exit(&vd
->vdev_dtl_lock
);
2147 vdev_dtl_contains(vdev_t
*vd
, vdev_dtl_type_t t
, uint64_t txg
, uint64_t size
)
2149 range_tree_t
*rt
= vd
->vdev_dtl
[t
];
2150 boolean_t dirty
= B_FALSE
;
2152 ASSERT(t
< DTL_TYPES
);
2153 ASSERT(vd
!= vd
->vdev_spa
->spa_root_vdev
);
2156 * While we are loading the pool, the DTLs have not been loaded yet.
2157 * Ignore the DTLs and try all devices. This avoids a recursive
2158 * mutex enter on the vdev_dtl_lock, and also makes us try hard
2159 * when loading the pool (relying on the checksum to ensure that
2160 * we get the right data -- note that we while loading, we are
2161 * only reading the MOS, which is always checksummed).
2163 if (vd
->vdev_spa
->spa_load_state
!= SPA_LOAD_NONE
)
2166 mutex_enter(&vd
->vdev_dtl_lock
);
2167 if (!range_tree_is_empty(rt
))
2168 dirty
= range_tree_contains(rt
, txg
, size
);
2169 mutex_exit(&vd
->vdev_dtl_lock
);
2175 vdev_dtl_empty(vdev_t
*vd
, vdev_dtl_type_t t
)
2177 range_tree_t
*rt
= vd
->vdev_dtl
[t
];
2180 mutex_enter(&vd
->vdev_dtl_lock
);
2181 empty
= range_tree_is_empty(rt
);
2182 mutex_exit(&vd
->vdev_dtl_lock
);
2188 * Returns the lowest txg in the DTL range.
2191 vdev_dtl_min(vdev_t
*vd
)
2195 ASSERT(MUTEX_HELD(&vd
->vdev_dtl_lock
));
2196 ASSERT3U(range_tree_space(vd
->vdev_dtl
[DTL_MISSING
]), !=, 0);
2197 ASSERT0(vd
->vdev_children
);
2199 rs
= avl_first(&vd
->vdev_dtl
[DTL_MISSING
]->rt_root
);
2200 return (rs
->rs_start
- 1);
2204 * Returns the highest txg in the DTL.
2207 vdev_dtl_max(vdev_t
*vd
)
2211 ASSERT(MUTEX_HELD(&vd
->vdev_dtl_lock
));
2212 ASSERT3U(range_tree_space(vd
->vdev_dtl
[DTL_MISSING
]), !=, 0);
2213 ASSERT0(vd
->vdev_children
);
2215 rs
= avl_last(&vd
->vdev_dtl
[DTL_MISSING
]->rt_root
);
2216 return (rs
->rs_end
);
2220 * Determine if a resilvering vdev should remove any DTL entries from
2221 * its range. If the vdev was resilvering for the entire duration of the
2222 * scan then it should excise that range from its DTLs. Otherwise, this
2223 * vdev is considered partially resilvered and should leave its DTL
2224 * entries intact. The comment in vdev_dtl_reassess() describes how we
2228 vdev_dtl_should_excise(vdev_t
*vd
)
2230 spa_t
*spa
= vd
->vdev_spa
;
2231 dsl_scan_t
*scn
= spa
->spa_dsl_pool
->dp_scan
;
2233 ASSERT0(scn
->scn_phys
.scn_errors
);
2234 ASSERT0(vd
->vdev_children
);
2236 if (vd
->vdev_state
< VDEV_STATE_DEGRADED
)
2239 if (vd
->vdev_resilver_txg
== 0 ||
2240 range_tree_is_empty(vd
->vdev_dtl
[DTL_MISSING
]))
2244 * When a resilver is initiated the scan will assign the scn_max_txg
2245 * value to the highest txg value that exists in all DTLs. If this
2246 * device's max DTL is not part of this scan (i.e. it is not in
2247 * the range (scn_min_txg, scn_max_txg] then it is not eligible
2250 if (vdev_dtl_max(vd
) <= scn
->scn_phys
.scn_max_txg
) {
2251 ASSERT3U(scn
->scn_phys
.scn_min_txg
, <=, vdev_dtl_min(vd
));
2252 ASSERT3U(scn
->scn_phys
.scn_min_txg
, <, vd
->vdev_resilver_txg
);
2253 ASSERT3U(vd
->vdev_resilver_txg
, <=, scn
->scn_phys
.scn_max_txg
);
2260 * Reassess DTLs after a config change or scrub completion.
2263 vdev_dtl_reassess(vdev_t
*vd
, uint64_t txg
, uint64_t scrub_txg
, int scrub_done
)
2265 spa_t
*spa
= vd
->vdev_spa
;
2269 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_READER
) != 0);
2271 for (int c
= 0; c
< vd
->vdev_children
; c
++)
2272 vdev_dtl_reassess(vd
->vdev_child
[c
], txg
,
2273 scrub_txg
, scrub_done
);
2275 if (vd
== spa
->spa_root_vdev
|| !vdev_is_concrete(vd
) || vd
->vdev_aux
)
2278 if (vd
->vdev_ops
->vdev_op_leaf
) {
2279 dsl_scan_t
*scn
= spa
->spa_dsl_pool
->dp_scan
;
2281 mutex_enter(&vd
->vdev_dtl_lock
);
2284 * If we've completed a scan cleanly then determine
2285 * if this vdev should remove any DTLs. We only want to
2286 * excise regions on vdevs that were available during
2287 * the entire duration of this scan.
2289 if (scrub_txg
!= 0 &&
2290 (spa
->spa_scrub_started
||
2291 (scn
!= NULL
&& scn
->scn_phys
.scn_errors
== 0)) &&
2292 vdev_dtl_should_excise(vd
)) {
2294 * We completed a scrub up to scrub_txg. If we
2295 * did it without rebooting, then the scrub dtl
2296 * will be valid, so excise the old region and
2297 * fold in the scrub dtl. Otherwise, leave the
2298 * dtl as-is if there was an error.
2300 * There's little trick here: to excise the beginning
2301 * of the DTL_MISSING map, we put it into a reference
2302 * tree and then add a segment with refcnt -1 that
2303 * covers the range [0, scrub_txg). This means
2304 * that each txg in that range has refcnt -1 or 0.
2305 * We then add DTL_SCRUB with a refcnt of 2, so that
2306 * entries in the range [0, scrub_txg) will have a
2307 * positive refcnt -- either 1 or 2. We then convert
2308 * the reference tree into the new DTL_MISSING map.
2310 space_reftree_create(&reftree
);
2311 space_reftree_add_map(&reftree
,
2312 vd
->vdev_dtl
[DTL_MISSING
], 1);
2313 space_reftree_add_seg(&reftree
, 0, scrub_txg
, -1);
2314 space_reftree_add_map(&reftree
,
2315 vd
->vdev_dtl
[DTL_SCRUB
], 2);
2316 space_reftree_generate_map(&reftree
,
2317 vd
->vdev_dtl
[DTL_MISSING
], 1);
2318 space_reftree_destroy(&reftree
);
2320 range_tree_vacate(vd
->vdev_dtl
[DTL_PARTIAL
], NULL
, NULL
);
2321 range_tree_walk(vd
->vdev_dtl
[DTL_MISSING
],
2322 range_tree_add
, vd
->vdev_dtl
[DTL_PARTIAL
]);
2324 range_tree_vacate(vd
->vdev_dtl
[DTL_SCRUB
], NULL
, NULL
);
2325 range_tree_vacate(vd
->vdev_dtl
[DTL_OUTAGE
], NULL
, NULL
);
2326 if (!vdev_readable(vd
))
2327 range_tree_add(vd
->vdev_dtl
[DTL_OUTAGE
], 0, -1ULL);
2329 range_tree_walk(vd
->vdev_dtl
[DTL_MISSING
],
2330 range_tree_add
, vd
->vdev_dtl
[DTL_OUTAGE
]);
2333 * If the vdev was resilvering and no longer has any
2334 * DTLs then reset its resilvering flag.
2336 if (vd
->vdev_resilver_txg
!= 0 &&
2337 range_tree_is_empty(vd
->vdev_dtl
[DTL_MISSING
]) &&
2338 range_tree_is_empty(vd
->vdev_dtl
[DTL_OUTAGE
]))
2339 vd
->vdev_resilver_txg
= 0;
2341 mutex_exit(&vd
->vdev_dtl_lock
);
2344 vdev_dirty(vd
->vdev_top
, VDD_DTL
, vd
, txg
);
2348 mutex_enter(&vd
->vdev_dtl_lock
);
2349 for (int t
= 0; t
< DTL_TYPES
; t
++) {
2350 /* account for child's outage in parent's missing map */
2351 int s
= (t
== DTL_MISSING
) ? DTL_OUTAGE
: t
;
2353 continue; /* leaf vdevs only */
2354 if (t
== DTL_PARTIAL
)
2355 minref
= 1; /* i.e. non-zero */
2356 else if (vd
->vdev_nparity
!= 0)
2357 minref
= vd
->vdev_nparity
+ 1; /* RAID-Z */
2359 minref
= vd
->vdev_children
; /* any kind of mirror */
2360 space_reftree_create(&reftree
);
2361 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
2362 vdev_t
*cvd
= vd
->vdev_child
[c
];
2363 mutex_enter(&cvd
->vdev_dtl_lock
);
2364 space_reftree_add_map(&reftree
, cvd
->vdev_dtl
[s
], 1);
2365 mutex_exit(&cvd
->vdev_dtl_lock
);
2367 space_reftree_generate_map(&reftree
, vd
->vdev_dtl
[t
], minref
);
2368 space_reftree_destroy(&reftree
);
2370 mutex_exit(&vd
->vdev_dtl_lock
);
2374 vdev_dtl_load(vdev_t
*vd
)
2376 spa_t
*spa
= vd
->vdev_spa
;
2377 objset_t
*mos
= spa
->spa_meta_objset
;
2380 if (vd
->vdev_ops
->vdev_op_leaf
&& vd
->vdev_dtl_object
!= 0) {
2381 ASSERT(vdev_is_concrete(vd
));
2383 error
= space_map_open(&vd
->vdev_dtl_sm
, mos
,
2384 vd
->vdev_dtl_object
, 0, -1ULL, 0);
2387 ASSERT(vd
->vdev_dtl_sm
!= NULL
);
2389 mutex_enter(&vd
->vdev_dtl_lock
);
2392 * Now that we've opened the space_map we need to update
2395 space_map_update(vd
->vdev_dtl_sm
);
2397 error
= space_map_load(vd
->vdev_dtl_sm
,
2398 vd
->vdev_dtl
[DTL_MISSING
], SM_ALLOC
);
2399 mutex_exit(&vd
->vdev_dtl_lock
);
2404 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
2405 error
= vdev_dtl_load(vd
->vdev_child
[c
]);
2414 vdev_destroy_unlink_zap(vdev_t
*vd
, uint64_t zapobj
, dmu_tx_t
*tx
)
2416 spa_t
*spa
= vd
->vdev_spa
;
2418 VERIFY0(zap_destroy(spa
->spa_meta_objset
, zapobj
, tx
));
2419 VERIFY0(zap_remove_int(spa
->spa_meta_objset
, spa
->spa_all_vdev_zaps
,
2424 vdev_create_link_zap(vdev_t
*vd
, dmu_tx_t
*tx
)
2426 spa_t
*spa
= vd
->vdev_spa
;
2427 uint64_t zap
= zap_create(spa
->spa_meta_objset
, DMU_OTN_ZAP_METADATA
,
2428 DMU_OT_NONE
, 0, tx
);
2431 VERIFY0(zap_add_int(spa
->spa_meta_objset
, spa
->spa_all_vdev_zaps
,
2438 vdev_construct_zaps(vdev_t
*vd
, dmu_tx_t
*tx
)
2440 if (vd
->vdev_ops
!= &vdev_hole_ops
&&
2441 vd
->vdev_ops
!= &vdev_missing_ops
&&
2442 vd
->vdev_ops
!= &vdev_root_ops
&&
2443 !vd
->vdev_top
->vdev_removing
) {
2444 if (vd
->vdev_ops
->vdev_op_leaf
&& vd
->vdev_leaf_zap
== 0) {
2445 vd
->vdev_leaf_zap
= vdev_create_link_zap(vd
, tx
);
2447 if (vd
== vd
->vdev_top
&& vd
->vdev_top_zap
== 0) {
2448 vd
->vdev_top_zap
= vdev_create_link_zap(vd
, tx
);
2451 for (uint64_t i
= 0; i
< vd
->vdev_children
; i
++) {
2452 vdev_construct_zaps(vd
->vdev_child
[i
], tx
);
2457 vdev_dtl_sync(vdev_t
*vd
, uint64_t txg
)
2459 spa_t
*spa
= vd
->vdev_spa
;
2460 range_tree_t
*rt
= vd
->vdev_dtl
[DTL_MISSING
];
2461 objset_t
*mos
= spa
->spa_meta_objset
;
2462 range_tree_t
*rtsync
;
2464 uint64_t object
= space_map_object(vd
->vdev_dtl_sm
);
2466 ASSERT(vdev_is_concrete(vd
));
2467 ASSERT(vd
->vdev_ops
->vdev_op_leaf
);
2469 tx
= dmu_tx_create_assigned(spa
->spa_dsl_pool
, txg
);
2471 if (vd
->vdev_detached
|| vd
->vdev_top
->vdev_removing
) {
2472 mutex_enter(&vd
->vdev_dtl_lock
);
2473 space_map_free(vd
->vdev_dtl_sm
, tx
);
2474 space_map_close(vd
->vdev_dtl_sm
);
2475 vd
->vdev_dtl_sm
= NULL
;
2476 mutex_exit(&vd
->vdev_dtl_lock
);
2479 * We only destroy the leaf ZAP for detached leaves or for
2480 * removed log devices. Removed data devices handle leaf ZAP
2481 * cleanup later, once cancellation is no longer possible.
2483 if (vd
->vdev_leaf_zap
!= 0 && (vd
->vdev_detached
||
2484 vd
->vdev_top
->vdev_islog
)) {
2485 vdev_destroy_unlink_zap(vd
, vd
->vdev_leaf_zap
, tx
);
2486 vd
->vdev_leaf_zap
= 0;
2493 if (vd
->vdev_dtl_sm
== NULL
) {
2494 uint64_t new_object
;
2496 new_object
= space_map_alloc(mos
, vdev_dtl_sm_blksz
, tx
);
2497 VERIFY3U(new_object
, !=, 0);
2499 VERIFY0(space_map_open(&vd
->vdev_dtl_sm
, mos
, new_object
,
2501 ASSERT(vd
->vdev_dtl_sm
!= NULL
);
2504 rtsync
= range_tree_create(NULL
, NULL
);
2506 mutex_enter(&vd
->vdev_dtl_lock
);
2507 range_tree_walk(rt
, range_tree_add
, rtsync
);
2508 mutex_exit(&vd
->vdev_dtl_lock
);
2510 space_map_truncate(vd
->vdev_dtl_sm
, vdev_dtl_sm_blksz
, tx
);
2511 space_map_write(vd
->vdev_dtl_sm
, rtsync
, SM_ALLOC
, SM_NO_VDEVID
, tx
);
2512 range_tree_vacate(rtsync
, NULL
, NULL
);
2514 range_tree_destroy(rtsync
);
2517 * If the object for the space map has changed then dirty
2518 * the top level so that we update the config.
2520 if (object
!= space_map_object(vd
->vdev_dtl_sm
)) {
2521 vdev_dbgmsg(vd
, "txg %llu, spa %s, DTL old object %llu, "
2522 "new object %llu", (u_longlong_t
)txg
, spa_name(spa
),
2523 (u_longlong_t
)object
,
2524 (u_longlong_t
)space_map_object(vd
->vdev_dtl_sm
));
2525 vdev_config_dirty(vd
->vdev_top
);
2530 mutex_enter(&vd
->vdev_dtl_lock
);
2531 space_map_update(vd
->vdev_dtl_sm
);
2532 mutex_exit(&vd
->vdev_dtl_lock
);
2536 * Determine whether the specified vdev can be offlined/detached/removed
2537 * without losing data.
2540 vdev_dtl_required(vdev_t
*vd
)
2542 spa_t
*spa
= vd
->vdev_spa
;
2543 vdev_t
*tvd
= vd
->vdev_top
;
2544 uint8_t cant_read
= vd
->vdev_cant_read
;
2547 ASSERT(spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
2549 if (vd
== spa
->spa_root_vdev
|| vd
== tvd
)
2553 * Temporarily mark the device as unreadable, and then determine
2554 * whether this results in any DTL outages in the top-level vdev.
2555 * If not, we can safely offline/detach/remove the device.
2557 vd
->vdev_cant_read
= B_TRUE
;
2558 vdev_dtl_reassess(tvd
, 0, 0, B_FALSE
);
2559 required
= !vdev_dtl_empty(tvd
, DTL_OUTAGE
);
2560 vd
->vdev_cant_read
= cant_read
;
2561 vdev_dtl_reassess(tvd
, 0, 0, B_FALSE
);
2563 if (!required
&& zio_injection_enabled
)
2564 required
= !!zio_handle_device_injection(vd
, NULL
, ECHILD
);
2570 * Determine if resilver is needed, and if so the txg range.
2573 vdev_resilver_needed(vdev_t
*vd
, uint64_t *minp
, uint64_t *maxp
)
2575 boolean_t needed
= B_FALSE
;
2576 uint64_t thismin
= UINT64_MAX
;
2577 uint64_t thismax
= 0;
2579 if (vd
->vdev_children
== 0) {
2580 mutex_enter(&vd
->vdev_dtl_lock
);
2581 if (!range_tree_is_empty(vd
->vdev_dtl
[DTL_MISSING
]) &&
2582 vdev_writeable(vd
)) {
2584 thismin
= vdev_dtl_min(vd
);
2585 thismax
= vdev_dtl_max(vd
);
2588 mutex_exit(&vd
->vdev_dtl_lock
);
2590 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
2591 vdev_t
*cvd
= vd
->vdev_child
[c
];
2592 uint64_t cmin
, cmax
;
2594 if (vdev_resilver_needed(cvd
, &cmin
, &cmax
)) {
2595 thismin
= MIN(thismin
, cmin
);
2596 thismax
= MAX(thismax
, cmax
);
2602 if (needed
&& minp
) {
2610 * Gets the checkpoint space map object from the vdev's ZAP.
2611 * Returns the spacemap object, or 0 if it wasn't in the ZAP
2612 * or the ZAP doesn't exist yet.
2615 vdev_checkpoint_sm_object(vdev_t
*vd
)
2617 ASSERT0(spa_config_held(vd
->vdev_spa
, SCL_ALL
, RW_WRITER
));
2618 if (vd
->vdev_top_zap
== 0) {
2622 uint64_t sm_obj
= 0;
2623 int err
= zap_lookup(spa_meta_objset(vd
->vdev_spa
), vd
->vdev_top_zap
,
2624 VDEV_TOP_ZAP_POOL_CHECKPOINT_SM
, sizeof (uint64_t), 1, &sm_obj
);
2626 ASSERT(err
== 0 || err
== ENOENT
);
2632 vdev_load(vdev_t
*vd
)
2636 * Recursively load all children.
2638 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
2639 error
= vdev_load(vd
->vdev_child
[c
]);
2645 vdev_set_deflate_ratio(vd
);
2648 * If this is a top-level vdev, initialize its metaslabs.
2650 if (vd
== vd
->vdev_top
&& vdev_is_concrete(vd
)) {
2651 if (vd
->vdev_ashift
== 0 || vd
->vdev_asize
== 0) {
2652 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
2653 VDEV_AUX_CORRUPT_DATA
);
2654 vdev_dbgmsg(vd
, "vdev_load: invalid size. ashift=%llu, "
2655 "asize=%llu", (u_longlong_t
)vd
->vdev_ashift
,
2656 (u_longlong_t
)vd
->vdev_asize
);
2657 return (SET_ERROR(ENXIO
));
2658 } else if ((error
= vdev_metaslab_init(vd
, 0)) != 0) {
2659 vdev_dbgmsg(vd
, "vdev_load: metaslab_init failed "
2660 "[error=%d]", error
);
2661 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
2662 VDEV_AUX_CORRUPT_DATA
);
2666 uint64_t checkpoint_sm_obj
= vdev_checkpoint_sm_object(vd
);
2667 if (checkpoint_sm_obj
!= 0) {
2668 objset_t
*mos
= spa_meta_objset(vd
->vdev_spa
);
2669 ASSERT(vd
->vdev_asize
!= 0);
2670 ASSERT3P(vd
->vdev_checkpoint_sm
, ==, NULL
);
2672 if ((error
= space_map_open(&vd
->vdev_checkpoint_sm
,
2673 mos
, checkpoint_sm_obj
, 0, vd
->vdev_asize
,
2674 vd
->vdev_ashift
))) {
2675 vdev_dbgmsg(vd
, "vdev_load: space_map_open "
2676 "failed for checkpoint spacemap (obj %llu) "
2678 (u_longlong_t
)checkpoint_sm_obj
, error
);
2681 ASSERT3P(vd
->vdev_checkpoint_sm
, !=, NULL
);
2682 space_map_update(vd
->vdev_checkpoint_sm
);
2685 * Since the checkpoint_sm contains free entries
2686 * exclusively we can use sm_alloc to indicate the
2687 * culmulative checkpointed space that has been freed.
2689 vd
->vdev_stat
.vs_checkpoint_space
=
2690 -vd
->vdev_checkpoint_sm
->sm_alloc
;
2691 vd
->vdev_spa
->spa_checkpoint_info
.sci_dspace
+=
2692 vd
->vdev_stat
.vs_checkpoint_space
;
2697 * If this is a leaf vdev, load its DTL.
2699 if (vd
->vdev_ops
->vdev_op_leaf
&& (error
= vdev_dtl_load(vd
)) != 0) {
2700 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
2701 VDEV_AUX_CORRUPT_DATA
);
2702 vdev_dbgmsg(vd
, "vdev_load: vdev_dtl_load failed "
2703 "[error=%d]", error
);
2707 uint64_t obsolete_sm_object
= vdev_obsolete_sm_object(vd
);
2708 if (obsolete_sm_object
!= 0) {
2709 objset_t
*mos
= vd
->vdev_spa
->spa_meta_objset
;
2710 ASSERT(vd
->vdev_asize
!= 0);
2711 ASSERT3P(vd
->vdev_obsolete_sm
, ==, NULL
);
2713 if ((error
= space_map_open(&vd
->vdev_obsolete_sm
, mos
,
2714 obsolete_sm_object
, 0, vd
->vdev_asize
, 0))) {
2715 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
2716 VDEV_AUX_CORRUPT_DATA
);
2717 vdev_dbgmsg(vd
, "vdev_load: space_map_open failed for "
2718 "obsolete spacemap (obj %llu) [error=%d]",
2719 (u_longlong_t
)obsolete_sm_object
, error
);
2722 space_map_update(vd
->vdev_obsolete_sm
);
2729 * The special vdev case is used for hot spares and l2cache devices. Its
2730 * sole purpose it to set the vdev state for the associated vdev. To do this,
2731 * we make sure that we can open the underlying device, then try to read the
2732 * label, and make sure that the label is sane and that it hasn't been
2733 * repurposed to another pool.
2736 vdev_validate_aux(vdev_t
*vd
)
2739 uint64_t guid
, version
;
2742 if (!vdev_readable(vd
))
2745 if ((label
= vdev_label_read_config(vd
, -1ULL)) == NULL
) {
2746 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
2747 VDEV_AUX_CORRUPT_DATA
);
2751 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_VERSION
, &version
) != 0 ||
2752 !SPA_VERSION_IS_SUPPORTED(version
) ||
2753 nvlist_lookup_uint64(label
, ZPOOL_CONFIG_GUID
, &guid
) != 0 ||
2754 guid
!= vd
->vdev_guid
||
2755 nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_STATE
, &state
) != 0) {
2756 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
2757 VDEV_AUX_CORRUPT_DATA
);
2763 * We don't actually check the pool state here. If it's in fact in
2764 * use by another pool, we update this fact on the fly when requested.
2771 * Free the objects used to store this vdev's spacemaps, and the array
2772 * that points to them.
2775 vdev_destroy_spacemaps(vdev_t
*vd
, dmu_tx_t
*tx
)
2777 if (vd
->vdev_ms_array
== 0)
2780 objset_t
*mos
= vd
->vdev_spa
->spa_meta_objset
;
2781 uint64_t array_count
= vd
->vdev_asize
>> vd
->vdev_ms_shift
;
2782 size_t array_bytes
= array_count
* sizeof (uint64_t);
2783 uint64_t *smobj_array
= kmem_alloc(array_bytes
, KM_SLEEP
);
2784 VERIFY0(dmu_read(mos
, vd
->vdev_ms_array
, 0,
2785 array_bytes
, smobj_array
, 0));
2787 for (uint64_t i
= 0; i
< array_count
; i
++) {
2788 uint64_t smobj
= smobj_array
[i
];
2792 space_map_free_obj(mos
, smobj
, tx
);
2795 kmem_free(smobj_array
, array_bytes
);
2796 VERIFY0(dmu_object_free(mos
, vd
->vdev_ms_array
, tx
));
2797 vd
->vdev_ms_array
= 0;
2801 vdev_remove_empty(vdev_t
*vd
, uint64_t txg
)
2803 spa_t
*spa
= vd
->vdev_spa
;
2806 ASSERT(vd
== vd
->vdev_top
);
2807 ASSERT3U(txg
, ==, spa_syncing_txg(spa
));
2809 if (vd
->vdev_ms
!= NULL
) {
2810 metaslab_group_t
*mg
= vd
->vdev_mg
;
2812 metaslab_group_histogram_verify(mg
);
2813 metaslab_class_histogram_verify(mg
->mg_class
);
2815 for (int m
= 0; m
< vd
->vdev_ms_count
; m
++) {
2816 metaslab_t
*msp
= vd
->vdev_ms
[m
];
2818 if (msp
== NULL
|| msp
->ms_sm
== NULL
)
2821 mutex_enter(&msp
->ms_lock
);
2823 * If the metaslab was not loaded when the vdev
2824 * was removed then the histogram accounting may
2825 * not be accurate. Update the histogram information
2826 * here so that we ensure that the metaslab group
2827 * and metaslab class are up-to-date.
2829 metaslab_group_histogram_remove(mg
, msp
);
2831 VERIFY0(space_map_allocated(msp
->ms_sm
));
2832 space_map_close(msp
->ms_sm
);
2834 mutex_exit(&msp
->ms_lock
);
2837 if (vd
->vdev_checkpoint_sm
!= NULL
) {
2838 ASSERT(spa_has_checkpoint(spa
));
2839 space_map_close(vd
->vdev_checkpoint_sm
);
2840 vd
->vdev_checkpoint_sm
= NULL
;
2843 metaslab_group_histogram_verify(mg
);
2844 metaslab_class_histogram_verify(mg
->mg_class
);
2845 for (int i
= 0; i
< RANGE_TREE_HISTOGRAM_SIZE
; i
++)
2846 ASSERT0(mg
->mg_histogram
[i
]);
2849 tx
= dmu_tx_create_assigned(spa_get_dsl(spa
), txg
);
2850 vdev_destroy_spacemaps(vd
, tx
);
2852 if (vd
->vdev_islog
&& vd
->vdev_top_zap
!= 0) {
2853 vdev_destroy_unlink_zap(vd
, vd
->vdev_top_zap
, tx
);
2854 vd
->vdev_top_zap
= 0;
2860 vdev_sync_done(vdev_t
*vd
, uint64_t txg
)
2863 boolean_t reassess
= !txg_list_empty(&vd
->vdev_ms_list
, TXG_CLEAN(txg
));
2865 ASSERT(vdev_is_concrete(vd
));
2867 while ((msp
= txg_list_remove(&vd
->vdev_ms_list
, TXG_CLEAN(txg
)))
2869 metaslab_sync_done(msp
, txg
);
2872 metaslab_sync_reassess(vd
->vdev_mg
);
2876 vdev_sync(vdev_t
*vd
, uint64_t txg
)
2878 spa_t
*spa
= vd
->vdev_spa
;
2883 if (range_tree_space(vd
->vdev_obsolete_segments
) > 0) {
2886 ASSERT(vd
->vdev_removing
||
2887 vd
->vdev_ops
== &vdev_indirect_ops
);
2889 tx
= dmu_tx_create_assigned(spa
->spa_dsl_pool
, txg
);
2890 vdev_indirect_sync_obsolete(vd
, tx
);
2894 * If the vdev is indirect, it can't have dirty
2895 * metaslabs or DTLs.
2897 if (vd
->vdev_ops
== &vdev_indirect_ops
) {
2898 ASSERT(txg_list_empty(&vd
->vdev_ms_list
, txg
));
2899 ASSERT(txg_list_empty(&vd
->vdev_dtl_list
, txg
));
2904 ASSERT(vdev_is_concrete(vd
));
2906 if (vd
->vdev_ms_array
== 0 && vd
->vdev_ms_shift
!= 0 &&
2907 !vd
->vdev_removing
) {
2908 ASSERT(vd
== vd
->vdev_top
);
2909 ASSERT0(vd
->vdev_indirect_config
.vic_mapping_object
);
2910 tx
= dmu_tx_create_assigned(spa
->spa_dsl_pool
, txg
);
2911 vd
->vdev_ms_array
= dmu_object_alloc(spa
->spa_meta_objset
,
2912 DMU_OT_OBJECT_ARRAY
, 0, DMU_OT_NONE
, 0, tx
);
2913 ASSERT(vd
->vdev_ms_array
!= 0);
2914 vdev_config_dirty(vd
);
2918 while ((msp
= txg_list_remove(&vd
->vdev_ms_list
, txg
)) != NULL
) {
2919 metaslab_sync(msp
, txg
);
2920 (void) txg_list_add(&vd
->vdev_ms_list
, msp
, TXG_CLEAN(txg
));
2923 while ((lvd
= txg_list_remove(&vd
->vdev_dtl_list
, txg
)) != NULL
)
2924 vdev_dtl_sync(lvd
, txg
);
2927 * Remove the metadata associated with this vdev once it's empty.
2928 * Note that this is typically used for log/cache device removal;
2929 * we don't empty toplevel vdevs when removing them. But if
2930 * a toplevel happens to be emptied, this is not harmful.
2932 if (vd
->vdev_stat
.vs_alloc
== 0 && vd
->vdev_removing
) {
2933 vdev_remove_empty(vd
, txg
);
2936 (void) txg_list_add(&spa
->spa_vdev_txg_list
, vd
, TXG_CLEAN(txg
));
2940 vdev_psize_to_asize(vdev_t
*vd
, uint64_t psize
)
2942 return (vd
->vdev_ops
->vdev_op_asize(vd
, psize
));
2946 * Mark the given vdev faulted. A faulted vdev behaves as if the device could
2947 * not be opened, and no I/O is attempted.
2950 vdev_fault(spa_t
*spa
, uint64_t guid
, vdev_aux_t aux
)
2954 spa_vdev_state_enter(spa
, SCL_NONE
);
2956 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
2957 return (spa_vdev_state_exit(spa
, NULL
, ENODEV
));
2959 if (!vd
->vdev_ops
->vdev_op_leaf
)
2960 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
2965 * We don't directly use the aux state here, but if we do a
2966 * vdev_reopen(), we need this value to be present to remember why we
2969 vd
->vdev_label_aux
= aux
;
2972 * Faulted state takes precedence over degraded.
2974 vd
->vdev_delayed_close
= B_FALSE
;
2975 vd
->vdev_faulted
= 1ULL;
2976 vd
->vdev_degraded
= 0ULL;
2977 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_FAULTED
, aux
);
2980 * If this device has the only valid copy of the data, then
2981 * back off and simply mark the vdev as degraded instead.
2983 if (!tvd
->vdev_islog
&& vd
->vdev_aux
== NULL
&& vdev_dtl_required(vd
)) {
2984 vd
->vdev_degraded
= 1ULL;
2985 vd
->vdev_faulted
= 0ULL;
2988 * If we reopen the device and it's not dead, only then do we
2993 if (vdev_readable(vd
))
2994 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_DEGRADED
, aux
);
2997 return (spa_vdev_state_exit(spa
, vd
, 0));
3001 * Mark the given vdev degraded. A degraded vdev is purely an indication to the
3002 * user that something is wrong. The vdev continues to operate as normal as far
3003 * as I/O is concerned.
3006 vdev_degrade(spa_t
*spa
, uint64_t guid
, vdev_aux_t aux
)
3010 spa_vdev_state_enter(spa
, SCL_NONE
);
3012 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
3013 return (spa_vdev_state_exit(spa
, NULL
, ENODEV
));
3015 if (!vd
->vdev_ops
->vdev_op_leaf
)
3016 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
3019 * If the vdev is already faulted, then don't do anything.
3021 if (vd
->vdev_faulted
|| vd
->vdev_degraded
)
3022 return (spa_vdev_state_exit(spa
, NULL
, 0));
3024 vd
->vdev_degraded
= 1ULL;
3025 if (!vdev_is_dead(vd
))
3026 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_DEGRADED
,
3029 return (spa_vdev_state_exit(spa
, vd
, 0));
3033 * Online the given vdev.
3035 * If 'ZFS_ONLINE_UNSPARE' is set, it implies two things. First, any attached
3036 * spare device should be detached when the device finishes resilvering.
3037 * Second, the online should be treated like a 'test' online case, so no FMA
3038 * events are generated if the device fails to open.
3041 vdev_online(spa_t
*spa
, uint64_t guid
, uint64_t flags
, vdev_state_t
*newstate
)
3043 vdev_t
*vd
, *tvd
, *pvd
, *rvd
= spa
->spa_root_vdev
;
3044 boolean_t wasoffline
;
3045 vdev_state_t oldstate
;
3047 spa_vdev_state_enter(spa
, SCL_NONE
);
3049 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
3050 return (spa_vdev_state_exit(spa
, NULL
, ENODEV
));
3052 if (!vd
->vdev_ops
->vdev_op_leaf
)
3053 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
3055 wasoffline
= (vd
->vdev_offline
|| vd
->vdev_tmpoffline
);
3056 oldstate
= vd
->vdev_state
;
3059 vd
->vdev_offline
= B_FALSE
;
3060 vd
->vdev_tmpoffline
= B_FALSE
;
3061 vd
->vdev_checkremove
= !!(flags
& ZFS_ONLINE_CHECKREMOVE
);
3062 vd
->vdev_forcefault
= !!(flags
& ZFS_ONLINE_FORCEFAULT
);
3064 /* XXX - L2ARC 1.0 does not support expansion */
3065 if (!vd
->vdev_aux
) {
3066 for (pvd
= vd
; pvd
!= rvd
; pvd
= pvd
->vdev_parent
)
3067 pvd
->vdev_expanding
= !!(flags
& ZFS_ONLINE_EXPAND
);
3071 vd
->vdev_checkremove
= vd
->vdev_forcefault
= B_FALSE
;
3073 if (!vd
->vdev_aux
) {
3074 for (pvd
= vd
; pvd
!= rvd
; pvd
= pvd
->vdev_parent
)
3075 pvd
->vdev_expanding
= B_FALSE
;
3079 *newstate
= vd
->vdev_state
;
3080 if ((flags
& ZFS_ONLINE_UNSPARE
) &&
3081 !vdev_is_dead(vd
) && vd
->vdev_parent
&&
3082 vd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
3083 vd
->vdev_parent
->vdev_child
[0] == vd
)
3084 vd
->vdev_unspare
= B_TRUE
;
3086 if ((flags
& ZFS_ONLINE_EXPAND
) || spa
->spa_autoexpand
) {
3088 /* XXX - L2ARC 1.0 does not support expansion */
3090 return (spa_vdev_state_exit(spa
, vd
, ENOTSUP
));
3091 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
3094 /* Restart initializing if necessary */
3095 mutex_enter(&vd
->vdev_initialize_lock
);
3096 if (vdev_writeable(vd
) &&
3097 vd
->vdev_initialize_thread
== NULL
&&
3098 vd
->vdev_initialize_state
== VDEV_INITIALIZE_ACTIVE
) {
3099 (void) vdev_initialize(vd
);
3101 mutex_exit(&vd
->vdev_initialize_lock
);
3104 (oldstate
< VDEV_STATE_DEGRADED
&&
3105 vd
->vdev_state
>= VDEV_STATE_DEGRADED
))
3106 spa_event_notify(spa
, vd
, NULL
, ESC_ZFS_VDEV_ONLINE
);
3108 return (spa_vdev_state_exit(spa
, vd
, 0));
3112 vdev_offline_locked(spa_t
*spa
, uint64_t guid
, uint64_t flags
)
3116 uint64_t generation
;
3117 metaslab_group_t
*mg
;
3120 spa_vdev_state_enter(spa
, SCL_ALLOC
);
3122 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
3123 return (spa_vdev_state_exit(spa
, NULL
, ENODEV
));
3125 if (!vd
->vdev_ops
->vdev_op_leaf
)
3126 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
3130 generation
= spa
->spa_config_generation
+ 1;
3133 * If the device isn't already offline, try to offline it.
3135 if (!vd
->vdev_offline
) {
3137 * If this device has the only valid copy of some data,
3138 * don't allow it to be offlined. Log devices are always
3141 if (!tvd
->vdev_islog
&& vd
->vdev_aux
== NULL
&&
3142 vdev_dtl_required(vd
))
3143 return (spa_vdev_state_exit(spa
, NULL
, EBUSY
));
3146 * If the top-level is a slog and it has had allocations
3147 * then proceed. We check that the vdev's metaslab group
3148 * is not NULL since it's possible that we may have just
3149 * added this vdev but not yet initialized its metaslabs.
3151 if (tvd
->vdev_islog
&& mg
!= NULL
) {
3153 * Prevent any future allocations.
3155 metaslab_group_passivate(mg
);
3156 (void) spa_vdev_state_exit(spa
, vd
, 0);
3158 error
= spa_reset_logs(spa
);
3161 * If the log device was successfully reset but has
3162 * checkpointed data, do not offline it.
3165 tvd
->vdev_checkpoint_sm
!= NULL
) {
3166 ASSERT3U(tvd
->vdev_checkpoint_sm
->sm_alloc
,
3168 error
= ZFS_ERR_CHECKPOINT_EXISTS
;
3171 spa_vdev_state_enter(spa
, SCL_ALLOC
);
3174 * Check to see if the config has changed.
3176 if (error
|| generation
!= spa
->spa_config_generation
) {
3177 metaslab_group_activate(mg
);
3179 return (spa_vdev_state_exit(spa
,
3181 (void) spa_vdev_state_exit(spa
, vd
, 0);
3184 ASSERT0(tvd
->vdev_stat
.vs_alloc
);
3188 * Offline this device and reopen its top-level vdev.
3189 * If the top-level vdev is a log device then just offline
3190 * it. Otherwise, if this action results in the top-level
3191 * vdev becoming unusable, undo it and fail the request.
3193 vd
->vdev_offline
= B_TRUE
;
3196 if (!tvd
->vdev_islog
&& vd
->vdev_aux
== NULL
&&
3197 vdev_is_dead(tvd
)) {
3198 vd
->vdev_offline
= B_FALSE
;
3200 return (spa_vdev_state_exit(spa
, NULL
, EBUSY
));
3204 * Add the device back into the metaslab rotor so that
3205 * once we online the device it's open for business.
3207 if (tvd
->vdev_islog
&& mg
!= NULL
)
3208 metaslab_group_activate(mg
);
3211 vd
->vdev_tmpoffline
= !!(flags
& ZFS_OFFLINE_TEMPORARY
);
3213 return (spa_vdev_state_exit(spa
, vd
, 0));
3217 vdev_offline(spa_t
*spa
, uint64_t guid
, uint64_t flags
)
3221 mutex_enter(&spa
->spa_vdev_top_lock
);
3222 error
= vdev_offline_locked(spa
, guid
, flags
);
3223 mutex_exit(&spa
->spa_vdev_top_lock
);
3229 * Clear the error counts associated with this vdev. Unlike vdev_online() and
3230 * vdev_offline(), we assume the spa config is locked. We also clear all
3231 * children. If 'vd' is NULL, then the user wants to clear all vdevs.
3234 vdev_clear(spa_t
*spa
, vdev_t
*vd
)
3236 vdev_t
*rvd
= spa
->spa_root_vdev
;
3238 ASSERT(spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
3243 vd
->vdev_stat
.vs_read_errors
= 0;
3244 vd
->vdev_stat
.vs_write_errors
= 0;
3245 vd
->vdev_stat
.vs_checksum_errors
= 0;
3247 for (int c
= 0; c
< vd
->vdev_children
; c
++)
3248 vdev_clear(spa
, vd
->vdev_child
[c
]);
3251 * It makes no sense to "clear" an indirect vdev.
3253 if (!vdev_is_concrete(vd
))
3257 * If we're in the FAULTED state or have experienced failed I/O, then
3258 * clear the persistent state and attempt to reopen the device. We
3259 * also mark the vdev config dirty, so that the new faulted state is
3260 * written out to disk.
3262 if (vd
->vdev_faulted
|| vd
->vdev_degraded
||
3263 !vdev_readable(vd
) || !vdev_writeable(vd
)) {
3266 * When reopening in reponse to a clear event, it may be due to
3267 * a fmadm repair request. In this case, if the device is
3268 * still broken, we want to still post the ereport again.
3270 vd
->vdev_forcefault
= B_TRUE
;
3272 vd
->vdev_faulted
= vd
->vdev_degraded
= 0ULL;
3273 vd
->vdev_cant_read
= B_FALSE
;
3274 vd
->vdev_cant_write
= B_FALSE
;
3276 vdev_reopen(vd
== rvd
? rvd
: vd
->vdev_top
);
3278 vd
->vdev_forcefault
= B_FALSE
;
3280 if (vd
!= rvd
&& vdev_writeable(vd
->vdev_top
))
3281 vdev_state_dirty(vd
->vdev_top
);
3283 if (vd
->vdev_aux
== NULL
&& !vdev_is_dead(vd
))
3284 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
3286 spa_event_notify(spa
, vd
, NULL
, ESC_ZFS_VDEV_CLEAR
);
3290 * When clearing a FMA-diagnosed fault, we always want to
3291 * unspare the device, as we assume that the original spare was
3292 * done in response to the FMA fault.
3294 if (!vdev_is_dead(vd
) && vd
->vdev_parent
!= NULL
&&
3295 vd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
3296 vd
->vdev_parent
->vdev_child
[0] == vd
)
3297 vd
->vdev_unspare
= B_TRUE
;
3301 vdev_is_dead(vdev_t
*vd
)
3304 * Holes and missing devices are always considered "dead".
3305 * This simplifies the code since we don't have to check for
3306 * these types of devices in the various code paths.
3307 * Instead we rely on the fact that we skip over dead devices
3308 * before issuing I/O to them.
3310 return (vd
->vdev_state
< VDEV_STATE_DEGRADED
||
3311 vd
->vdev_ops
== &vdev_hole_ops
||
3312 vd
->vdev_ops
== &vdev_missing_ops
);
3316 vdev_readable(vdev_t
*vd
)
3318 return (!vdev_is_dead(vd
) && !vd
->vdev_cant_read
);
3322 vdev_writeable(vdev_t
*vd
)
3324 return (!vdev_is_dead(vd
) && !vd
->vdev_cant_write
&&
3325 vdev_is_concrete(vd
));
3329 vdev_allocatable(vdev_t
*vd
)
3331 uint64_t state
= vd
->vdev_state
;
3334 * We currently allow allocations from vdevs which may be in the
3335 * process of reopening (i.e. VDEV_STATE_CLOSED). If the device
3336 * fails to reopen then we'll catch it later when we're holding
3337 * the proper locks. Note that we have to get the vdev state
3338 * in a local variable because although it changes atomically,
3339 * we're asking two separate questions about it.
3341 return (!(state
< VDEV_STATE_DEGRADED
&& state
!= VDEV_STATE_CLOSED
) &&
3342 !vd
->vdev_cant_write
&& vdev_is_concrete(vd
) &&
3343 vd
->vdev_mg
->mg_initialized
);
3347 vdev_accessible(vdev_t
*vd
, zio_t
*zio
)
3349 ASSERT(zio
->io_vd
== vd
);
3351 if (vdev_is_dead(vd
) || vd
->vdev_remove_wanted
)
3354 if (zio
->io_type
== ZIO_TYPE_READ
)
3355 return (!vd
->vdev_cant_read
);
3357 if (zio
->io_type
== ZIO_TYPE_WRITE
)
3358 return (!vd
->vdev_cant_write
);
3364 vdev_is_spacemap_addressable(vdev_t
*vd
)
3367 * Assuming 47 bits of the space map entry dedicated for the entry's
3368 * offset (see description in space_map.h), we calculate the maximum
3369 * address that can be described by a space map entry for the given
3372 uint64_t shift
= vd
->vdev_ashift
+ 47;
3374 if (shift
>= 63) /* detect potential overflow */
3377 return (vd
->vdev_asize
< (1ULL << shift
));
3381 * Get statistics for the given vdev.
3384 vdev_get_stats(vdev_t
*vd
, vdev_stat_t
*vs
)
3386 spa_t
*spa
= vd
->vdev_spa
;
3387 vdev_t
*rvd
= spa
->spa_root_vdev
;
3388 vdev_t
*tvd
= vd
->vdev_top
;
3390 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_READER
) != 0);
3392 mutex_enter(&vd
->vdev_stat_lock
);
3393 bcopy(&vd
->vdev_stat
, vs
, sizeof (*vs
));
3394 vs
->vs_timestamp
= gethrtime() - vs
->vs_timestamp
;
3395 vs
->vs_state
= vd
->vdev_state
;
3396 vs
->vs_rsize
= vdev_get_min_asize(vd
);
3397 if (vd
->vdev_ops
->vdev_op_leaf
) {
3398 vs
->vs_rsize
+= VDEV_LABEL_START_SIZE
+ VDEV_LABEL_END_SIZE
;
3400 * Report intializing progress. Since we don't have the
3401 * initializing locks held, this is only an estimate (although a
3402 * fairly accurate one).
3404 vs
->vs_initialize_bytes_done
= vd
->vdev_initialize_bytes_done
;
3405 vs
->vs_initialize_bytes_est
= vd
->vdev_initialize_bytes_est
;
3406 vs
->vs_initialize_state
= vd
->vdev_initialize_state
;
3407 vs
->vs_initialize_action_time
= vd
->vdev_initialize_action_time
;
3410 * Report expandable space on top-level, non-auxillary devices only.
3411 * The expandable space is reported in terms of metaslab sized units
3412 * since that determines how much space the pool can expand.
3414 if (vd
->vdev_aux
== NULL
&& tvd
!= NULL
) {
3415 vs
->vs_esize
= P2ALIGN(vd
->vdev_max_asize
- vd
->vdev_asize
-
3416 spa
->spa_bootsize
, 1ULL << tvd
->vdev_ms_shift
);
3418 if (vd
->vdev_aux
== NULL
&& vd
== vd
->vdev_top
&&
3419 vdev_is_concrete(vd
)) {
3420 vs
->vs_fragmentation
= vd
->vdev_mg
->mg_fragmentation
;
3424 * If we're getting stats on the root vdev, aggregate the I/O counts
3425 * over all top-level vdevs (i.e. the direct children of the root).
3428 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
3429 vdev_t
*cvd
= rvd
->vdev_child
[c
];
3430 vdev_stat_t
*cvs
= &cvd
->vdev_stat
;
3432 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
3433 vs
->vs_ops
[t
] += cvs
->vs_ops
[t
];
3434 vs
->vs_bytes
[t
] += cvs
->vs_bytes
[t
];
3436 cvs
->vs_scan_removing
= cvd
->vdev_removing
;
3439 mutex_exit(&vd
->vdev_stat_lock
);
3443 vdev_clear_stats(vdev_t
*vd
)
3445 mutex_enter(&vd
->vdev_stat_lock
);
3446 vd
->vdev_stat
.vs_space
= 0;
3447 vd
->vdev_stat
.vs_dspace
= 0;
3448 vd
->vdev_stat
.vs_alloc
= 0;
3449 mutex_exit(&vd
->vdev_stat_lock
);
3453 vdev_scan_stat_init(vdev_t
*vd
)
3455 vdev_stat_t
*vs
= &vd
->vdev_stat
;
3457 for (int c
= 0; c
< vd
->vdev_children
; c
++)
3458 vdev_scan_stat_init(vd
->vdev_child
[c
]);
3460 mutex_enter(&vd
->vdev_stat_lock
);
3461 vs
->vs_scan_processed
= 0;
3462 mutex_exit(&vd
->vdev_stat_lock
);
3466 vdev_stat_update(zio_t
*zio
, uint64_t psize
)
3468 spa_t
*spa
= zio
->io_spa
;
3469 vdev_t
*rvd
= spa
->spa_root_vdev
;
3470 vdev_t
*vd
= zio
->io_vd
? zio
->io_vd
: rvd
;
3472 uint64_t txg
= zio
->io_txg
;
3473 vdev_stat_t
*vs
= &vd
->vdev_stat
;
3474 zio_type_t type
= zio
->io_type
;
3475 int flags
= zio
->io_flags
;
3478 * If this i/o is a gang leader, it didn't do any actual work.
3480 if (zio
->io_gang_tree
)
3483 if (zio
->io_error
== 0) {
3485 * If this is a root i/o, don't count it -- we've already
3486 * counted the top-level vdevs, and vdev_get_stats() will
3487 * aggregate them when asked. This reduces contention on
3488 * the root vdev_stat_lock and implicitly handles blocks
3489 * that compress away to holes, for which there is no i/o.
3490 * (Holes never create vdev children, so all the counters
3491 * remain zero, which is what we want.)
3493 * Note: this only applies to successful i/o (io_error == 0)
3494 * because unlike i/o counts, errors are not additive.
3495 * When reading a ditto block, for example, failure of
3496 * one top-level vdev does not imply a root-level error.
3501 ASSERT(vd
== zio
->io_vd
);
3503 if (flags
& ZIO_FLAG_IO_BYPASS
)
3506 mutex_enter(&vd
->vdev_stat_lock
);
3508 if (flags
& ZIO_FLAG_IO_REPAIR
) {
3509 if (flags
& ZIO_FLAG_SCAN_THREAD
) {
3510 dsl_scan_phys_t
*scn_phys
=
3511 &spa
->spa_dsl_pool
->dp_scan
->scn_phys
;
3512 uint64_t *processed
= &scn_phys
->scn_processed
;
3515 if (vd
->vdev_ops
->vdev_op_leaf
)
3516 atomic_add_64(processed
, psize
);
3517 vs
->vs_scan_processed
+= psize
;
3520 if (flags
& ZIO_FLAG_SELF_HEAL
)
3521 vs
->vs_self_healed
+= psize
;
3525 vs
->vs_bytes
[type
] += psize
;
3527 mutex_exit(&vd
->vdev_stat_lock
);
3531 if (flags
& ZIO_FLAG_SPECULATIVE
)
3535 * If this is an I/O error that is going to be retried, then ignore the
3536 * error. Otherwise, the user may interpret B_FAILFAST I/O errors as
3537 * hard errors, when in reality they can happen for any number of
3538 * innocuous reasons (bus resets, MPxIO link failure, etc).
3540 if (zio
->io_error
== EIO
&&
3541 !(zio
->io_flags
& ZIO_FLAG_IO_RETRY
))
3545 * Intent logs writes won't propagate their error to the root
3546 * I/O so don't mark these types of failures as pool-level
3549 if (zio
->io_vd
== NULL
&& (zio
->io_flags
& ZIO_FLAG_DONT_PROPAGATE
))
3552 mutex_enter(&vd
->vdev_stat_lock
);
3553 if (type
== ZIO_TYPE_READ
&& !vdev_is_dead(vd
)) {
3554 if (zio
->io_error
== ECKSUM
)
3555 vs
->vs_checksum_errors
++;
3557 vs
->vs_read_errors
++;
3559 if (type
== ZIO_TYPE_WRITE
&& !vdev_is_dead(vd
))
3560 vs
->vs_write_errors
++;
3561 mutex_exit(&vd
->vdev_stat_lock
);
3563 if (spa
->spa_load_state
== SPA_LOAD_NONE
&&
3564 type
== ZIO_TYPE_WRITE
&& txg
!= 0 &&
3565 (!(flags
& ZIO_FLAG_IO_REPAIR
) ||
3566 (flags
& ZIO_FLAG_SCAN_THREAD
) ||
3567 spa
->spa_claiming
)) {
3569 * This is either a normal write (not a repair), or it's
3570 * a repair induced by the scrub thread, or it's a repair
3571 * made by zil_claim() during spa_load() in the first txg.
3572 * In the normal case, we commit the DTL change in the same
3573 * txg as the block was born. In the scrub-induced repair
3574 * case, we know that scrubs run in first-pass syncing context,
3575 * so we commit the DTL change in spa_syncing_txg(spa).
3576 * In the zil_claim() case, we commit in spa_first_txg(spa).
3578 * We currently do not make DTL entries for failed spontaneous
3579 * self-healing writes triggered by normal (non-scrubbing)
3580 * reads, because we have no transactional context in which to
3581 * do so -- and it's not clear that it'd be desirable anyway.
3583 if (vd
->vdev_ops
->vdev_op_leaf
) {
3584 uint64_t commit_txg
= txg
;
3585 if (flags
& ZIO_FLAG_SCAN_THREAD
) {
3586 ASSERT(flags
& ZIO_FLAG_IO_REPAIR
);
3587 ASSERT(spa_sync_pass(spa
) == 1);
3588 vdev_dtl_dirty(vd
, DTL_SCRUB
, txg
, 1);
3589 commit_txg
= spa_syncing_txg(spa
);
3590 } else if (spa
->spa_claiming
) {
3591 ASSERT(flags
& ZIO_FLAG_IO_REPAIR
);
3592 commit_txg
= spa_first_txg(spa
);
3594 ASSERT(commit_txg
>= spa_syncing_txg(spa
));
3595 if (vdev_dtl_contains(vd
, DTL_MISSING
, txg
, 1))
3597 for (pvd
= vd
; pvd
!= rvd
; pvd
= pvd
->vdev_parent
)
3598 vdev_dtl_dirty(pvd
, DTL_PARTIAL
, txg
, 1);
3599 vdev_dirty(vd
->vdev_top
, VDD_DTL
, vd
, commit_txg
);
3602 vdev_dtl_dirty(vd
, DTL_MISSING
, txg
, 1);
3607 * Update the in-core space usage stats for this vdev, its metaslab class,
3608 * and the root vdev.
3611 vdev_space_update(vdev_t
*vd
, int64_t alloc_delta
, int64_t defer_delta
,
3612 int64_t space_delta
)
3614 int64_t dspace_delta
= space_delta
;
3615 spa_t
*spa
= vd
->vdev_spa
;
3616 vdev_t
*rvd
= spa
->spa_root_vdev
;
3617 metaslab_group_t
*mg
= vd
->vdev_mg
;
3618 metaslab_class_t
*mc
= mg
? mg
->mg_class
: NULL
;
3620 ASSERT(vd
== vd
->vdev_top
);
3623 * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion
3624 * factor. We must calculate this here and not at the root vdev
3625 * because the root vdev's psize-to-asize is simply the max of its
3626 * childrens', thus not accurate enough for us.
3628 ASSERT((dspace_delta
& (SPA_MINBLOCKSIZE
-1)) == 0);
3629 ASSERT(vd
->vdev_deflate_ratio
!= 0 || vd
->vdev_isl2cache
);
3630 dspace_delta
= (dspace_delta
>> SPA_MINBLOCKSHIFT
) *
3631 vd
->vdev_deflate_ratio
;
3633 mutex_enter(&vd
->vdev_stat_lock
);
3634 vd
->vdev_stat
.vs_alloc
+= alloc_delta
;
3635 vd
->vdev_stat
.vs_space
+= space_delta
;
3636 vd
->vdev_stat
.vs_dspace
+= dspace_delta
;
3637 mutex_exit(&vd
->vdev_stat_lock
);
3639 if (mc
== spa_normal_class(spa
)) {
3640 mutex_enter(&rvd
->vdev_stat_lock
);
3641 rvd
->vdev_stat
.vs_alloc
+= alloc_delta
;
3642 rvd
->vdev_stat
.vs_space
+= space_delta
;
3643 rvd
->vdev_stat
.vs_dspace
+= dspace_delta
;
3644 mutex_exit(&rvd
->vdev_stat_lock
);
3648 ASSERT(rvd
== vd
->vdev_parent
);
3649 ASSERT(vd
->vdev_ms_count
!= 0);
3651 metaslab_class_space_update(mc
,
3652 alloc_delta
, defer_delta
, space_delta
, dspace_delta
);
3657 * Mark a top-level vdev's config as dirty, placing it on the dirty list
3658 * so that it will be written out next time the vdev configuration is synced.
3659 * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs.
3662 vdev_config_dirty(vdev_t
*vd
)
3664 spa_t
*spa
= vd
->vdev_spa
;
3665 vdev_t
*rvd
= spa
->spa_root_vdev
;
3668 ASSERT(spa_writeable(spa
));
3671 * If this is an aux vdev (as with l2cache and spare devices), then we
3672 * update the vdev config manually and set the sync flag.
3674 if (vd
->vdev_aux
!= NULL
) {
3675 spa_aux_vdev_t
*sav
= vd
->vdev_aux
;
3679 for (c
= 0; c
< sav
->sav_count
; c
++) {
3680 if (sav
->sav_vdevs
[c
] == vd
)
3684 if (c
== sav
->sav_count
) {
3686 * We're being removed. There's nothing more to do.
3688 ASSERT(sav
->sav_sync
== B_TRUE
);
3692 sav
->sav_sync
= B_TRUE
;
3694 if (nvlist_lookup_nvlist_array(sav
->sav_config
,
3695 ZPOOL_CONFIG_L2CACHE
, &aux
, &naux
) != 0) {
3696 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
3697 ZPOOL_CONFIG_SPARES
, &aux
, &naux
) == 0);
3703 * Setting the nvlist in the middle if the array is a little
3704 * sketchy, but it will work.
3706 nvlist_free(aux
[c
]);
3707 aux
[c
] = vdev_config_generate(spa
, vd
, B_TRUE
, 0);
3713 * The dirty list is protected by the SCL_CONFIG lock. The caller
3714 * must either hold SCL_CONFIG as writer, or must be the sync thread
3715 * (which holds SCL_CONFIG as reader). There's only one sync thread,
3716 * so this is sufficient to ensure mutual exclusion.
3718 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_WRITER
) ||
3719 (dsl_pool_sync_context(spa_get_dsl(spa
)) &&
3720 spa_config_held(spa
, SCL_CONFIG
, RW_READER
)));
3723 for (c
= 0; c
< rvd
->vdev_children
; c
++)
3724 vdev_config_dirty(rvd
->vdev_child
[c
]);
3726 ASSERT(vd
== vd
->vdev_top
);
3728 if (!list_link_active(&vd
->vdev_config_dirty_node
) &&
3729 vdev_is_concrete(vd
)) {
3730 list_insert_head(&spa
->spa_config_dirty_list
, vd
);
3736 vdev_config_clean(vdev_t
*vd
)
3738 spa_t
*spa
= vd
->vdev_spa
;
3740 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_WRITER
) ||
3741 (dsl_pool_sync_context(spa_get_dsl(spa
)) &&
3742 spa_config_held(spa
, SCL_CONFIG
, RW_READER
)));
3744 ASSERT(list_link_active(&vd
->vdev_config_dirty_node
));
3745 list_remove(&spa
->spa_config_dirty_list
, vd
);
3749 * Mark a top-level vdev's state as dirty, so that the next pass of
3750 * spa_sync() can convert this into vdev_config_dirty(). We distinguish
3751 * the state changes from larger config changes because they require
3752 * much less locking, and are often needed for administrative actions.
3755 vdev_state_dirty(vdev_t
*vd
)
3757 spa_t
*spa
= vd
->vdev_spa
;
3759 ASSERT(spa_writeable(spa
));
3760 ASSERT(vd
== vd
->vdev_top
);
3763 * The state list is protected by the SCL_STATE lock. The caller
3764 * must either hold SCL_STATE as writer, or must be the sync thread
3765 * (which holds SCL_STATE as reader). There's only one sync thread,
3766 * so this is sufficient to ensure mutual exclusion.
3768 ASSERT(spa_config_held(spa
, SCL_STATE
, RW_WRITER
) ||
3769 (dsl_pool_sync_context(spa_get_dsl(spa
)) &&
3770 spa_config_held(spa
, SCL_STATE
, RW_READER
)));
3772 if (!list_link_active(&vd
->vdev_state_dirty_node
) &&
3773 vdev_is_concrete(vd
))
3774 list_insert_head(&spa
->spa_state_dirty_list
, vd
);
3778 vdev_state_clean(vdev_t
*vd
)
3780 spa_t
*spa
= vd
->vdev_spa
;
3782 ASSERT(spa_config_held(spa
, SCL_STATE
, RW_WRITER
) ||
3783 (dsl_pool_sync_context(spa_get_dsl(spa
)) &&
3784 spa_config_held(spa
, SCL_STATE
, RW_READER
)));
3786 ASSERT(list_link_active(&vd
->vdev_state_dirty_node
));
3787 list_remove(&spa
->spa_state_dirty_list
, vd
);
3791 * Propagate vdev state up from children to parent.
3794 vdev_propagate_state(vdev_t
*vd
)
3796 spa_t
*spa
= vd
->vdev_spa
;
3797 vdev_t
*rvd
= spa
->spa_root_vdev
;
3798 int degraded
= 0, faulted
= 0;
3802 if (vd
->vdev_children
> 0) {
3803 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
3804 child
= vd
->vdev_child
[c
];
3807 * Don't factor holes or indirect vdevs into the
3810 if (!vdev_is_concrete(child
))
3813 if (!vdev_readable(child
) ||
3814 (!vdev_writeable(child
) && spa_writeable(spa
))) {
3816 * Root special: if there is a top-level log
3817 * device, treat the root vdev as if it were
3820 if (child
->vdev_islog
&& vd
== rvd
)
3824 } else if (child
->vdev_state
<= VDEV_STATE_DEGRADED
) {
3828 if (child
->vdev_stat
.vs_aux
== VDEV_AUX_CORRUPT_DATA
)
3832 vd
->vdev_ops
->vdev_op_state_change(vd
, faulted
, degraded
);
3835 * Root special: if there is a top-level vdev that cannot be
3836 * opened due to corrupted metadata, then propagate the root
3837 * vdev's aux state as 'corrupt' rather than 'insufficient
3840 if (corrupted
&& vd
== rvd
&&
3841 rvd
->vdev_state
== VDEV_STATE_CANT_OPEN
)
3842 vdev_set_state(rvd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
3843 VDEV_AUX_CORRUPT_DATA
);
3846 if (vd
->vdev_parent
)
3847 vdev_propagate_state(vd
->vdev_parent
);
3851 * Set a vdev's state. If this is during an open, we don't update the parent
3852 * state, because we're in the process of opening children depth-first.
3853 * Otherwise, we propagate the change to the parent.
3855 * If this routine places a device in a faulted state, an appropriate ereport is
3859 vdev_set_state(vdev_t
*vd
, boolean_t isopen
, vdev_state_t state
, vdev_aux_t aux
)
3861 uint64_t save_state
;
3862 spa_t
*spa
= vd
->vdev_spa
;
3864 if (state
== vd
->vdev_state
) {
3865 vd
->vdev_stat
.vs_aux
= aux
;
3869 save_state
= vd
->vdev_state
;
3871 vd
->vdev_state
= state
;
3872 vd
->vdev_stat
.vs_aux
= aux
;
3875 * If we are setting the vdev state to anything but an open state, then
3876 * always close the underlying device unless the device has requested
3877 * a delayed close (i.e. we're about to remove or fault the device).
3878 * Otherwise, we keep accessible but invalid devices open forever.
3879 * We don't call vdev_close() itself, because that implies some extra
3880 * checks (offline, etc) that we don't want here. This is limited to
3881 * leaf devices, because otherwise closing the device will affect other
3884 if (!vd
->vdev_delayed_close
&& vdev_is_dead(vd
) &&
3885 vd
->vdev_ops
->vdev_op_leaf
)
3886 vd
->vdev_ops
->vdev_op_close(vd
);
3889 * If we have brought this vdev back into service, we need
3890 * to notify fmd so that it can gracefully repair any outstanding
3891 * cases due to a missing device. We do this in all cases, even those
3892 * that probably don't correlate to a repaired fault. This is sure to
3893 * catch all cases, and we let the zfs-retire agent sort it out. If
3894 * this is a transient state it's OK, as the retire agent will
3895 * double-check the state of the vdev before repairing it.
3897 if (state
== VDEV_STATE_HEALTHY
&& vd
->vdev_ops
->vdev_op_leaf
&&
3898 vd
->vdev_prevstate
!= state
)
3899 zfs_post_state_change(spa
, vd
);
3901 if (vd
->vdev_removed
&&
3902 state
== VDEV_STATE_CANT_OPEN
&&
3903 (aux
== VDEV_AUX_OPEN_FAILED
|| vd
->vdev_checkremove
)) {
3905 * If the previous state is set to VDEV_STATE_REMOVED, then this
3906 * device was previously marked removed and someone attempted to
3907 * reopen it. If this failed due to a nonexistent device, then
3908 * keep the device in the REMOVED state. We also let this be if
3909 * it is one of our special test online cases, which is only
3910 * attempting to online the device and shouldn't generate an FMA
3913 vd
->vdev_state
= VDEV_STATE_REMOVED
;
3914 vd
->vdev_stat
.vs_aux
= VDEV_AUX_NONE
;
3915 } else if (state
== VDEV_STATE_REMOVED
) {
3916 vd
->vdev_removed
= B_TRUE
;
3917 } else if (state
== VDEV_STATE_CANT_OPEN
) {
3919 * If we fail to open a vdev during an import or recovery, we
3920 * mark it as "not available", which signifies that it was
3921 * never there to begin with. Failure to open such a device
3922 * is not considered an error.
3924 if ((spa_load_state(spa
) == SPA_LOAD_IMPORT
||
3925 spa_load_state(spa
) == SPA_LOAD_RECOVER
) &&
3926 vd
->vdev_ops
->vdev_op_leaf
)
3927 vd
->vdev_not_present
= 1;
3930 * Post the appropriate ereport. If the 'prevstate' field is
3931 * set to something other than VDEV_STATE_UNKNOWN, it indicates
3932 * that this is part of a vdev_reopen(). In this case, we don't
3933 * want to post the ereport if the device was already in the
3934 * CANT_OPEN state beforehand.
3936 * If the 'checkremove' flag is set, then this is an attempt to
3937 * online the device in response to an insertion event. If we
3938 * hit this case, then we have detected an insertion event for a
3939 * faulted or offline device that wasn't in the removed state.
3940 * In this scenario, we don't post an ereport because we are
3941 * about to replace the device, or attempt an online with
3942 * vdev_forcefault, which will generate the fault for us.
3944 if ((vd
->vdev_prevstate
!= state
|| vd
->vdev_forcefault
) &&
3945 !vd
->vdev_not_present
&& !vd
->vdev_checkremove
&&
3946 vd
!= spa
->spa_root_vdev
) {
3950 case VDEV_AUX_OPEN_FAILED
:
3951 class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED
;
3953 case VDEV_AUX_CORRUPT_DATA
:
3954 class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA
;
3956 case VDEV_AUX_NO_REPLICAS
:
3957 class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS
;
3959 case VDEV_AUX_BAD_GUID_SUM
:
3960 class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM
;
3962 case VDEV_AUX_TOO_SMALL
:
3963 class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL
;
3965 case VDEV_AUX_BAD_LABEL
:
3966 class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL
;
3969 class = FM_EREPORT_ZFS_DEVICE_UNKNOWN
;
3972 zfs_ereport_post(class, spa
, vd
, NULL
, save_state
, 0);
3975 /* Erase any notion of persistent removed state */
3976 vd
->vdev_removed
= B_FALSE
;
3978 vd
->vdev_removed
= B_FALSE
;
3981 if (!isopen
&& vd
->vdev_parent
)
3982 vdev_propagate_state(vd
->vdev_parent
);
3986 vdev_children_are_offline(vdev_t
*vd
)
3988 ASSERT(!vd
->vdev_ops
->vdev_op_leaf
);
3990 for (uint64_t i
= 0; i
< vd
->vdev_children
; i
++) {
3991 if (vd
->vdev_child
[i
]->vdev_state
!= VDEV_STATE_OFFLINE
)
3999 * Check the vdev configuration to ensure that it's capable of supporting
4000 * a root pool. We do not support partial configuration.
4001 * In addition, only a single top-level vdev is allowed.
4004 vdev_is_bootable(vdev_t
*vd
)
4006 if (!vd
->vdev_ops
->vdev_op_leaf
) {
4007 char *vdev_type
= vd
->vdev_ops
->vdev_op_type
;
4009 if (strcmp(vdev_type
, VDEV_TYPE_ROOT
) == 0 &&
4010 vd
->vdev_children
> 1) {
4012 } else if (strcmp(vdev_type
, VDEV_TYPE_MISSING
) == 0 ||
4013 strcmp(vdev_type
, VDEV_TYPE_INDIRECT
) == 0) {
4018 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
4019 if (!vdev_is_bootable(vd
->vdev_child
[c
]))
4026 vdev_is_concrete(vdev_t
*vd
)
4028 vdev_ops_t
*ops
= vd
->vdev_ops
;
4029 if (ops
== &vdev_indirect_ops
|| ops
== &vdev_hole_ops
||
4030 ops
== &vdev_missing_ops
|| ops
== &vdev_root_ops
) {
4038 * Determine if a log device has valid content. If the vdev was
4039 * removed or faulted in the MOS config then we know that
4040 * the content on the log device has already been written to the pool.
4043 vdev_log_state_valid(vdev_t
*vd
)
4045 if (vd
->vdev_ops
->vdev_op_leaf
&& !vd
->vdev_faulted
&&
4049 for (int c
= 0; c
< vd
->vdev_children
; c
++)
4050 if (vdev_log_state_valid(vd
->vdev_child
[c
]))
4057 * Expand a vdev if possible.
4060 vdev_expand(vdev_t
*vd
, uint64_t txg
)
4062 ASSERT(vd
->vdev_top
== vd
);
4063 ASSERT(spa_config_held(vd
->vdev_spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
4065 vdev_set_deflate_ratio(vd
);
4067 if ((vd
->vdev_asize
>> vd
->vdev_ms_shift
) > vd
->vdev_ms_count
&&
4068 vdev_is_concrete(vd
)) {
4069 VERIFY(vdev_metaslab_init(vd
, txg
) == 0);
4070 vdev_config_dirty(vd
);
4078 vdev_split(vdev_t
*vd
)
4080 vdev_t
*cvd
, *pvd
= vd
->vdev_parent
;
4082 vdev_remove_child(pvd
, vd
);
4083 vdev_compact_children(pvd
);
4085 cvd
= pvd
->vdev_child
[0];
4086 if (pvd
->vdev_children
== 1) {
4087 vdev_remove_parent(cvd
);
4088 cvd
->vdev_splitting
= B_TRUE
;
4090 vdev_propagate_state(cvd
);
4094 vdev_deadman(vdev_t
*vd
)
4096 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
4097 vdev_t
*cvd
= vd
->vdev_child
[c
];
4102 if (vd
->vdev_ops
->vdev_op_leaf
) {
4103 vdev_queue_t
*vq
= &vd
->vdev_queue
;
4105 mutex_enter(&vq
->vq_lock
);
4106 if (avl_numnodes(&vq
->vq_active_tree
) > 0) {
4107 spa_t
*spa
= vd
->vdev_spa
;
4112 * Look at the head of all the pending queues,
4113 * if any I/O has been outstanding for longer than
4114 * the spa_deadman_synctime we panic the system.
4116 fio
= avl_first(&vq
->vq_active_tree
);
4117 delta
= gethrtime() - fio
->io_timestamp
;
4118 if (delta
> spa_deadman_synctime(spa
)) {
4119 vdev_dbgmsg(vd
, "SLOW IO: zio timestamp "
4120 "%lluns, delta %lluns, last io %lluns",
4121 fio
->io_timestamp
, (u_longlong_t
)delta
,
4122 vq
->vq_io_complete_ts
);
4123 fm_panic("I/O to pool '%s' appears to be "
4124 "hung.", spa_name(spa
));
4127 mutex_exit(&vq
->vq_lock
);