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, 2015 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>
30 #include <sys/zfs_context.h>
31 #include <sys/fm/fs/zfs.h>
33 #include <sys/spa_impl.h>
35 #include <sys/dmu_tx.h>
36 #include <sys/vdev_impl.h>
37 #include <sys/uberblock_impl.h>
38 #include <sys/metaslab.h>
39 #include <sys/metaslab_impl.h>
40 #include <sys/space_map.h>
41 #include <sys/space_reftree.h>
44 #include <sys/fs/zfs.h>
47 #include <sys/dsl_scan.h>
51 * Virtual device management.
54 static vdev_ops_t
*vdev_ops_table
[] = {
67 /* maximum scrub/resilver I/O queue per leaf vdev */
68 int zfs_scrub_limit
= 10;
71 * When a vdev is added, it will be divided into approximately (but no
72 * more than) this number of metaslabs.
74 int metaslabs_per_vdev
= 200;
77 * Given a vdev type, return the appropriate ops vector.
80 vdev_getops(const char *type
)
82 vdev_ops_t
*ops
, **opspp
;
84 for (opspp
= vdev_ops_table
; (ops
= *opspp
) != NULL
; opspp
++)
85 if (strcmp(ops
->vdev_op_type
, type
) == 0)
92 * Default asize function: return the MAX of psize with the asize of
93 * all children. This is what's used by anything other than RAID-Z.
96 vdev_default_asize(vdev_t
*vd
, uint64_t psize
)
98 uint64_t asize
= P2ROUNDUP(psize
, 1ULL << vd
->vdev_top
->vdev_ashift
);
101 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
102 csize
= vdev_psize_to_asize(vd
->vdev_child
[c
], psize
);
103 asize
= MAX(asize
, csize
);
110 * Get the minimum allocatable size. We define the allocatable size as
111 * the vdev's asize rounded to the nearest metaslab. This allows us to
112 * replace or attach devices which don't have the same physical size but
113 * can still satisfy the same number of allocations.
116 vdev_get_min_asize(vdev_t
*vd
)
118 vdev_t
*pvd
= vd
->vdev_parent
;
121 * If our parent is NULL (inactive spare or cache) or is the root,
122 * just return our own asize.
125 return (vd
->vdev_asize
);
128 * The top-level vdev just returns the allocatable size rounded
129 * to the nearest metaslab.
131 if (vd
== vd
->vdev_top
)
132 return (P2ALIGN(vd
->vdev_asize
, 1ULL << vd
->vdev_ms_shift
));
135 * The allocatable space for a raidz vdev is N * sizeof(smallest child),
136 * so each child must provide at least 1/Nth of its asize.
138 if (pvd
->vdev_ops
== &vdev_raidz_ops
)
139 return ((pvd
->vdev_min_asize
+ pvd
->vdev_children
- 1) /
142 return (pvd
->vdev_min_asize
);
146 vdev_set_min_asize(vdev_t
*vd
)
148 vd
->vdev_min_asize
= vdev_get_min_asize(vd
);
150 for (int c
= 0; c
< vd
->vdev_children
; c
++)
151 vdev_set_min_asize(vd
->vdev_child
[c
]);
155 vdev_lookup_top(spa_t
*spa
, uint64_t vdev
)
157 vdev_t
*rvd
= spa
->spa_root_vdev
;
159 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_READER
) != 0);
161 if (vdev
< rvd
->vdev_children
) {
162 ASSERT(rvd
->vdev_child
[vdev
] != NULL
);
163 return (rvd
->vdev_child
[vdev
]);
170 vdev_lookup_by_guid(vdev_t
*vd
, uint64_t guid
)
174 if (vd
->vdev_guid
== guid
)
177 for (int c
= 0; c
< vd
->vdev_children
; c
++)
178 if ((mvd
= vdev_lookup_by_guid(vd
->vdev_child
[c
], guid
)) !=
186 vdev_count_leaves_impl(vdev_t
*vd
)
190 if (vd
->vdev_ops
->vdev_op_leaf
)
193 for (int c
= 0; c
< vd
->vdev_children
; c
++)
194 n
+= vdev_count_leaves_impl(vd
->vdev_child
[c
]);
200 vdev_count_leaves(spa_t
*spa
)
202 return (vdev_count_leaves_impl(spa
->spa_root_vdev
));
206 vdev_add_child(vdev_t
*pvd
, vdev_t
*cvd
)
208 size_t oldsize
, newsize
;
209 uint64_t id
= cvd
->vdev_id
;
211 spa_t
*spa
= cvd
->vdev_spa
;
213 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
214 ASSERT(cvd
->vdev_parent
== NULL
);
216 cvd
->vdev_parent
= pvd
;
221 ASSERT(id
>= pvd
->vdev_children
|| pvd
->vdev_child
[id
] == NULL
);
223 oldsize
= pvd
->vdev_children
* sizeof (vdev_t
*);
224 pvd
->vdev_children
= MAX(pvd
->vdev_children
, id
+ 1);
225 newsize
= pvd
->vdev_children
* sizeof (vdev_t
*);
227 newchild
= kmem_zalloc(newsize
, KM_SLEEP
);
228 if (pvd
->vdev_child
!= NULL
) {
229 bcopy(pvd
->vdev_child
, newchild
, oldsize
);
230 kmem_free(pvd
->vdev_child
, oldsize
);
233 pvd
->vdev_child
= newchild
;
234 pvd
->vdev_child
[id
] = cvd
;
236 cvd
->vdev_top
= (pvd
->vdev_top
? pvd
->vdev_top
: cvd
);
237 ASSERT(cvd
->vdev_top
->vdev_parent
->vdev_parent
== NULL
);
240 * Walk up all ancestors to update guid sum.
242 for (; pvd
!= NULL
; pvd
= pvd
->vdev_parent
)
243 pvd
->vdev_guid_sum
+= cvd
->vdev_guid_sum
;
247 vdev_remove_child(vdev_t
*pvd
, vdev_t
*cvd
)
250 uint_t id
= cvd
->vdev_id
;
252 ASSERT(cvd
->vdev_parent
== pvd
);
257 ASSERT(id
< pvd
->vdev_children
);
258 ASSERT(pvd
->vdev_child
[id
] == cvd
);
260 pvd
->vdev_child
[id
] = NULL
;
261 cvd
->vdev_parent
= NULL
;
263 for (c
= 0; c
< pvd
->vdev_children
; c
++)
264 if (pvd
->vdev_child
[c
])
267 if (c
== pvd
->vdev_children
) {
268 kmem_free(pvd
->vdev_child
, c
* sizeof (vdev_t
*));
269 pvd
->vdev_child
= NULL
;
270 pvd
->vdev_children
= 0;
274 * Walk up all ancestors to update guid sum.
276 for (; pvd
!= NULL
; pvd
= pvd
->vdev_parent
)
277 pvd
->vdev_guid_sum
-= cvd
->vdev_guid_sum
;
281 * Remove any holes in the child array.
284 vdev_compact_children(vdev_t
*pvd
)
286 vdev_t
**newchild
, *cvd
;
287 int oldc
= pvd
->vdev_children
;
290 ASSERT(spa_config_held(pvd
->vdev_spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
292 for (int c
= newc
= 0; c
< oldc
; c
++)
293 if (pvd
->vdev_child
[c
])
296 newchild
= kmem_alloc(newc
* sizeof (vdev_t
*), KM_SLEEP
);
298 for (int c
= newc
= 0; c
< oldc
; c
++) {
299 if ((cvd
= pvd
->vdev_child
[c
]) != NULL
) {
300 newchild
[newc
] = cvd
;
301 cvd
->vdev_id
= newc
++;
305 kmem_free(pvd
->vdev_child
, oldc
* sizeof (vdev_t
*));
306 pvd
->vdev_child
= newchild
;
307 pvd
->vdev_children
= newc
;
311 * Allocate and minimally initialize a vdev_t.
314 vdev_alloc_common(spa_t
*spa
, uint_t id
, uint64_t guid
, vdev_ops_t
*ops
)
318 vd
= kmem_zalloc(sizeof (vdev_t
), KM_SLEEP
);
320 if (spa
->spa_root_vdev
== NULL
) {
321 ASSERT(ops
== &vdev_root_ops
);
322 spa
->spa_root_vdev
= vd
;
323 spa
->spa_load_guid
= spa_generate_guid(NULL
);
326 if (guid
== 0 && ops
!= &vdev_hole_ops
) {
327 if (spa
->spa_root_vdev
== vd
) {
329 * The root vdev's guid will also be the pool guid,
330 * which must be unique among all pools.
332 guid
= spa_generate_guid(NULL
);
335 * Any other vdev's guid must be unique within the pool.
337 guid
= spa_generate_guid(spa
);
339 ASSERT(!spa_guid_exists(spa_guid(spa
), guid
));
344 vd
->vdev_guid
= guid
;
345 vd
->vdev_guid_sum
= guid
;
347 vd
->vdev_state
= VDEV_STATE_CLOSED
;
348 vd
->vdev_ishole
= (ops
== &vdev_hole_ops
);
350 mutex_init(&vd
->vdev_dtl_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
351 mutex_init(&vd
->vdev_stat_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
352 mutex_init(&vd
->vdev_probe_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
353 mutex_init(&vd
->vdev_queue_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
354 for (int t
= 0; t
< DTL_TYPES
; t
++) {
355 vd
->vdev_dtl
[t
] = range_tree_create(NULL
, NULL
,
358 txg_list_create(&vd
->vdev_ms_list
, spa
,
359 offsetof(struct metaslab
, ms_txg_node
));
360 txg_list_create(&vd
->vdev_dtl_list
, spa
,
361 offsetof(struct vdev
, vdev_dtl_node
));
362 vd
->vdev_stat
.vs_timestamp
= gethrtime();
370 * Allocate a new vdev. The 'alloctype' is used to control whether we are
371 * creating a new vdev or loading an existing one - the behavior is slightly
372 * different for each case.
375 vdev_alloc(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
, uint_t id
,
380 uint64_t guid
= 0, islog
, nparity
;
383 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
385 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_TYPE
, &type
) != 0)
386 return (SET_ERROR(EINVAL
));
388 if ((ops
= vdev_getops(type
)) == NULL
)
389 return (SET_ERROR(EINVAL
));
392 * If this is a load, get the vdev guid from the nvlist.
393 * Otherwise, vdev_alloc_common() will generate one for us.
395 if (alloctype
== VDEV_ALLOC_LOAD
) {
398 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_ID
, &label_id
) ||
400 return (SET_ERROR(EINVAL
));
402 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_GUID
, &guid
) != 0)
403 return (SET_ERROR(EINVAL
));
404 } else if (alloctype
== VDEV_ALLOC_SPARE
) {
405 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_GUID
, &guid
) != 0)
406 return (SET_ERROR(EINVAL
));
407 } else if (alloctype
== VDEV_ALLOC_L2CACHE
) {
408 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_GUID
, &guid
) != 0)
409 return (SET_ERROR(EINVAL
));
410 } else if (alloctype
== VDEV_ALLOC_ROOTPOOL
) {
411 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_GUID
, &guid
) != 0)
412 return (SET_ERROR(EINVAL
));
416 * The first allocated vdev must be of type 'root'.
418 if (ops
!= &vdev_root_ops
&& spa
->spa_root_vdev
== NULL
)
419 return (SET_ERROR(EINVAL
));
422 * Determine whether we're a log vdev.
425 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_IS_LOG
, &islog
);
426 if (islog
&& spa_version(spa
) < SPA_VERSION_SLOGS
)
427 return (SET_ERROR(ENOTSUP
));
429 if (ops
== &vdev_hole_ops
&& spa_version(spa
) < SPA_VERSION_HOLES
)
430 return (SET_ERROR(ENOTSUP
));
433 * Set the nparity property for RAID-Z vdevs.
436 if (ops
== &vdev_raidz_ops
) {
437 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_NPARITY
,
439 if (nparity
== 0 || nparity
> VDEV_RAIDZ_MAXPARITY
)
440 return (SET_ERROR(EINVAL
));
442 * Previous versions could only support 1 or 2 parity
446 spa_version(spa
) < SPA_VERSION_RAIDZ2
)
447 return (SET_ERROR(ENOTSUP
));
449 spa_version(spa
) < SPA_VERSION_RAIDZ3
)
450 return (SET_ERROR(ENOTSUP
));
453 * We require the parity to be specified for SPAs that
454 * support multiple parity levels.
456 if (spa_version(spa
) >= SPA_VERSION_RAIDZ2
)
457 return (SET_ERROR(EINVAL
));
459 * Otherwise, we default to 1 parity device for RAID-Z.
466 ASSERT(nparity
!= -1ULL);
468 vd
= vdev_alloc_common(spa
, id
, guid
, ops
);
470 vd
->vdev_islog
= islog
;
471 vd
->vdev_nparity
= nparity
;
473 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_PATH
, &vd
->vdev_path
) == 0)
474 vd
->vdev_path
= spa_strdup(vd
->vdev_path
);
475 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_DEVID
, &vd
->vdev_devid
) == 0)
476 vd
->vdev_devid
= spa_strdup(vd
->vdev_devid
);
477 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_PHYS_PATH
,
478 &vd
->vdev_physpath
) == 0)
479 vd
->vdev_physpath
= spa_strdup(vd
->vdev_physpath
);
480 if (nvlist_lookup_string(nv
, ZPOOL_CONFIG_FRU
, &vd
->vdev_fru
) == 0)
481 vd
->vdev_fru
= spa_strdup(vd
->vdev_fru
);
484 * Set the whole_disk property. If it's not specified, leave the value
487 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_WHOLE_DISK
,
488 &vd
->vdev_wholedisk
) != 0)
489 vd
->vdev_wholedisk
= -1ULL;
492 * Look for the 'not present' flag. This will only be set if the device
493 * was not present at the time of import.
495 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_NOT_PRESENT
,
496 &vd
->vdev_not_present
);
499 * Get the alignment requirement.
501 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_ASHIFT
, &vd
->vdev_ashift
);
504 * Retrieve the vdev creation time.
506 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_CREATE_TXG
,
510 * If we're a top-level vdev, try to load the allocation parameters.
512 if (parent
&& !parent
->vdev_parent
&&
513 (alloctype
== VDEV_ALLOC_LOAD
|| alloctype
== VDEV_ALLOC_SPLIT
)) {
514 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_METASLAB_ARRAY
,
516 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_METASLAB_SHIFT
,
518 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_ASIZE
,
520 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_REMOVING
,
522 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_VDEV_TOP_ZAP
,
525 ASSERT0(vd
->vdev_top_zap
);
528 if (parent
&& !parent
->vdev_parent
&& alloctype
!= VDEV_ALLOC_ATTACH
) {
529 ASSERT(alloctype
== VDEV_ALLOC_LOAD
||
530 alloctype
== VDEV_ALLOC_ADD
||
531 alloctype
== VDEV_ALLOC_SPLIT
||
532 alloctype
== VDEV_ALLOC_ROOTPOOL
);
533 vd
->vdev_mg
= metaslab_group_create(islog
?
534 spa_log_class(spa
) : spa_normal_class(spa
), vd
);
537 if (vd
->vdev_ops
->vdev_op_leaf
&&
538 (alloctype
== VDEV_ALLOC_LOAD
|| alloctype
== VDEV_ALLOC_SPLIT
)) {
539 (void) nvlist_lookup_uint64(nv
,
540 ZPOOL_CONFIG_VDEV_LEAF_ZAP
, &vd
->vdev_leaf_zap
);
542 ASSERT0(vd
->vdev_leaf_zap
);
546 * If we're a leaf vdev, try to load the DTL object and other state.
549 if (vd
->vdev_ops
->vdev_op_leaf
&&
550 (alloctype
== VDEV_ALLOC_LOAD
|| alloctype
== VDEV_ALLOC_L2CACHE
||
551 alloctype
== VDEV_ALLOC_ROOTPOOL
)) {
552 if (alloctype
== VDEV_ALLOC_LOAD
) {
553 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_DTL
,
554 &vd
->vdev_dtl_object
);
555 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_UNSPARE
,
559 if (alloctype
== VDEV_ALLOC_ROOTPOOL
) {
562 if (nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_IS_SPARE
,
563 &spare
) == 0 && spare
)
567 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_OFFLINE
,
570 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_RESILVER_TXG
,
571 &vd
->vdev_resilver_txg
);
574 * When importing a pool, we want to ignore the persistent fault
575 * state, as the diagnosis made on another system may not be
576 * valid in the current context. Local vdevs will
577 * remain in the faulted state.
579 if (spa_load_state(spa
) == SPA_LOAD_OPEN
) {
580 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_FAULTED
,
582 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_DEGRADED
,
584 (void) nvlist_lookup_uint64(nv
, ZPOOL_CONFIG_REMOVED
,
587 if (vd
->vdev_faulted
|| vd
->vdev_degraded
) {
591 VDEV_AUX_ERR_EXCEEDED
;
592 if (nvlist_lookup_string(nv
,
593 ZPOOL_CONFIG_AUX_STATE
, &aux
) == 0 &&
594 strcmp(aux
, "external") == 0)
595 vd
->vdev_label_aux
= VDEV_AUX_EXTERNAL
;
601 * Add ourselves to the parent's list of children.
603 vdev_add_child(parent
, vd
);
611 vdev_free(vdev_t
*vd
)
613 spa_t
*spa
= vd
->vdev_spa
;
616 * vdev_free() implies closing the vdev first. This is simpler than
617 * trying to ensure complicated semantics for all callers.
621 ASSERT(!list_link_active(&vd
->vdev_config_dirty_node
));
622 ASSERT(!list_link_active(&vd
->vdev_state_dirty_node
));
627 for (int c
= 0; c
< vd
->vdev_children
; c
++)
628 vdev_free(vd
->vdev_child
[c
]);
630 ASSERT(vd
->vdev_child
== NULL
);
631 ASSERT(vd
->vdev_guid_sum
== vd
->vdev_guid
);
634 * Discard allocation state.
636 if (vd
->vdev_mg
!= NULL
) {
637 vdev_metaslab_fini(vd
);
638 metaslab_group_destroy(vd
->vdev_mg
);
641 ASSERT0(vd
->vdev_stat
.vs_space
);
642 ASSERT0(vd
->vdev_stat
.vs_dspace
);
643 ASSERT0(vd
->vdev_stat
.vs_alloc
);
646 * Remove this vdev from its parent's child list.
648 vdev_remove_child(vd
->vdev_parent
, vd
);
650 ASSERT(vd
->vdev_parent
== NULL
);
653 * Clean up vdev structure.
659 spa_strfree(vd
->vdev_path
);
661 spa_strfree(vd
->vdev_devid
);
662 if (vd
->vdev_physpath
)
663 spa_strfree(vd
->vdev_physpath
);
665 spa_strfree(vd
->vdev_fru
);
667 if (vd
->vdev_isspare
)
668 spa_spare_remove(vd
);
669 if (vd
->vdev_isl2cache
)
670 spa_l2cache_remove(vd
);
672 txg_list_destroy(&vd
->vdev_ms_list
);
673 txg_list_destroy(&vd
->vdev_dtl_list
);
675 mutex_enter(&vd
->vdev_dtl_lock
);
676 space_map_close(vd
->vdev_dtl_sm
);
677 for (int t
= 0; t
< DTL_TYPES
; t
++) {
678 range_tree_vacate(vd
->vdev_dtl
[t
], NULL
, NULL
);
679 range_tree_destroy(vd
->vdev_dtl
[t
]);
681 mutex_exit(&vd
->vdev_dtl_lock
);
683 mutex_destroy(&vd
->vdev_queue_lock
);
684 mutex_destroy(&vd
->vdev_dtl_lock
);
685 mutex_destroy(&vd
->vdev_stat_lock
);
686 mutex_destroy(&vd
->vdev_probe_lock
);
688 if (vd
== spa
->spa_root_vdev
)
689 spa
->spa_root_vdev
= NULL
;
691 kmem_free(vd
, sizeof (vdev_t
));
695 * Transfer top-level vdev state from svd to tvd.
698 vdev_top_transfer(vdev_t
*svd
, vdev_t
*tvd
)
700 spa_t
*spa
= svd
->vdev_spa
;
705 ASSERT(tvd
== tvd
->vdev_top
);
707 tvd
->vdev_ms_array
= svd
->vdev_ms_array
;
708 tvd
->vdev_ms_shift
= svd
->vdev_ms_shift
;
709 tvd
->vdev_ms_count
= svd
->vdev_ms_count
;
710 tvd
->vdev_top_zap
= svd
->vdev_top_zap
;
712 svd
->vdev_ms_array
= 0;
713 svd
->vdev_ms_shift
= 0;
714 svd
->vdev_ms_count
= 0;
715 svd
->vdev_top_zap
= 0;
718 ASSERT3P(tvd
->vdev_mg
, ==, svd
->vdev_mg
);
719 tvd
->vdev_mg
= svd
->vdev_mg
;
720 tvd
->vdev_ms
= svd
->vdev_ms
;
725 if (tvd
->vdev_mg
!= NULL
)
726 tvd
->vdev_mg
->mg_vd
= tvd
;
728 tvd
->vdev_stat
.vs_alloc
= svd
->vdev_stat
.vs_alloc
;
729 tvd
->vdev_stat
.vs_space
= svd
->vdev_stat
.vs_space
;
730 tvd
->vdev_stat
.vs_dspace
= svd
->vdev_stat
.vs_dspace
;
732 svd
->vdev_stat
.vs_alloc
= 0;
733 svd
->vdev_stat
.vs_space
= 0;
734 svd
->vdev_stat
.vs_dspace
= 0;
736 for (t
= 0; t
< TXG_SIZE
; t
++) {
737 while ((msp
= txg_list_remove(&svd
->vdev_ms_list
, t
)) != NULL
)
738 (void) txg_list_add(&tvd
->vdev_ms_list
, msp
, t
);
739 while ((vd
= txg_list_remove(&svd
->vdev_dtl_list
, t
)) != NULL
)
740 (void) txg_list_add(&tvd
->vdev_dtl_list
, vd
, t
);
741 if (txg_list_remove_this(&spa
->spa_vdev_txg_list
, svd
, t
))
742 (void) txg_list_add(&spa
->spa_vdev_txg_list
, tvd
, t
);
745 if (list_link_active(&svd
->vdev_config_dirty_node
)) {
746 vdev_config_clean(svd
);
747 vdev_config_dirty(tvd
);
750 if (list_link_active(&svd
->vdev_state_dirty_node
)) {
751 vdev_state_clean(svd
);
752 vdev_state_dirty(tvd
);
755 tvd
->vdev_deflate_ratio
= svd
->vdev_deflate_ratio
;
756 svd
->vdev_deflate_ratio
= 0;
758 tvd
->vdev_islog
= svd
->vdev_islog
;
763 vdev_top_update(vdev_t
*tvd
, vdev_t
*vd
)
770 for (int c
= 0; c
< vd
->vdev_children
; c
++)
771 vdev_top_update(tvd
, vd
->vdev_child
[c
]);
775 * Add a mirror/replacing vdev above an existing vdev.
778 vdev_add_parent(vdev_t
*cvd
, vdev_ops_t
*ops
)
780 spa_t
*spa
= cvd
->vdev_spa
;
781 vdev_t
*pvd
= cvd
->vdev_parent
;
784 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
786 mvd
= vdev_alloc_common(spa
, cvd
->vdev_id
, 0, ops
);
788 mvd
->vdev_asize
= cvd
->vdev_asize
;
789 mvd
->vdev_min_asize
= cvd
->vdev_min_asize
;
790 mvd
->vdev_max_asize
= cvd
->vdev_max_asize
;
791 mvd
->vdev_ashift
= cvd
->vdev_ashift
;
792 mvd
->vdev_state
= cvd
->vdev_state
;
793 mvd
->vdev_crtxg
= cvd
->vdev_crtxg
;
795 vdev_remove_child(pvd
, cvd
);
796 vdev_add_child(pvd
, mvd
);
797 cvd
->vdev_id
= mvd
->vdev_children
;
798 vdev_add_child(mvd
, cvd
);
799 vdev_top_update(cvd
->vdev_top
, cvd
->vdev_top
);
801 if (mvd
== mvd
->vdev_top
)
802 vdev_top_transfer(cvd
, mvd
);
808 * Remove a 1-way mirror/replacing vdev from the tree.
811 vdev_remove_parent(vdev_t
*cvd
)
813 vdev_t
*mvd
= cvd
->vdev_parent
;
814 vdev_t
*pvd
= mvd
->vdev_parent
;
816 ASSERT(spa_config_held(cvd
->vdev_spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
818 ASSERT(mvd
->vdev_children
== 1);
819 ASSERT(mvd
->vdev_ops
== &vdev_mirror_ops
||
820 mvd
->vdev_ops
== &vdev_replacing_ops
||
821 mvd
->vdev_ops
== &vdev_spare_ops
);
822 cvd
->vdev_ashift
= mvd
->vdev_ashift
;
824 vdev_remove_child(mvd
, cvd
);
825 vdev_remove_child(pvd
, mvd
);
828 * If cvd will replace mvd as a top-level vdev, preserve mvd's guid.
829 * Otherwise, we could have detached an offline device, and when we
830 * go to import the pool we'll think we have two top-level vdevs,
831 * instead of a different version of the same top-level vdev.
833 if (mvd
->vdev_top
== mvd
) {
834 uint64_t guid_delta
= mvd
->vdev_guid
- cvd
->vdev_guid
;
835 cvd
->vdev_orig_guid
= cvd
->vdev_guid
;
836 cvd
->vdev_guid
+= guid_delta
;
837 cvd
->vdev_guid_sum
+= guid_delta
;
839 cvd
->vdev_id
= mvd
->vdev_id
;
840 vdev_add_child(pvd
, cvd
);
841 vdev_top_update(cvd
->vdev_top
, cvd
->vdev_top
);
843 if (cvd
== cvd
->vdev_top
)
844 vdev_top_transfer(mvd
, cvd
);
846 ASSERT(mvd
->vdev_children
== 0);
851 vdev_metaslab_init(vdev_t
*vd
, uint64_t txg
)
853 spa_t
*spa
= vd
->vdev_spa
;
854 objset_t
*mos
= spa
->spa_meta_objset
;
856 uint64_t oldc
= vd
->vdev_ms_count
;
857 uint64_t newc
= vd
->vdev_asize
>> vd
->vdev_ms_shift
;
861 ASSERT(txg
== 0 || spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
864 * This vdev is not being allocated from yet or is a hole.
866 if (vd
->vdev_ms_shift
== 0)
869 ASSERT(!vd
->vdev_ishole
);
872 * Compute the raidz-deflation ratio. Note, we hard-code
873 * in 128k (1 << 17) because it is the "typical" blocksize.
874 * Even though SPA_MAXBLOCKSIZE changed, this algorithm can not change,
875 * otherwise it would inconsistently account for existing bp's.
877 vd
->vdev_deflate_ratio
= (1 << 17) /
878 (vdev_psize_to_asize(vd
, 1 << 17) >> SPA_MINBLOCKSHIFT
);
880 ASSERT(oldc
<= newc
);
882 mspp
= kmem_zalloc(newc
* sizeof (*mspp
), KM_SLEEP
);
885 bcopy(vd
->vdev_ms
, mspp
, oldc
* sizeof (*mspp
));
886 kmem_free(vd
->vdev_ms
, oldc
* sizeof (*mspp
));
890 vd
->vdev_ms_count
= newc
;
892 for (m
= oldc
; m
< newc
; m
++) {
896 error
= dmu_read(mos
, vd
->vdev_ms_array
,
897 m
* sizeof (uint64_t), sizeof (uint64_t), &object
,
903 error
= metaslab_init(vd
->vdev_mg
, m
, object
, txg
,
910 spa_config_enter(spa
, SCL_ALLOC
, FTAG
, RW_WRITER
);
913 * If the vdev is being removed we don't activate
914 * the metaslabs since we want to ensure that no new
915 * allocations are performed on this device.
917 if (oldc
== 0 && !vd
->vdev_removing
)
918 metaslab_group_activate(vd
->vdev_mg
);
921 spa_config_exit(spa
, SCL_ALLOC
, FTAG
);
927 vdev_metaslab_fini(vdev_t
*vd
)
930 uint64_t count
= vd
->vdev_ms_count
;
932 if (vd
->vdev_ms
!= NULL
) {
933 metaslab_group_passivate(vd
->vdev_mg
);
934 for (m
= 0; m
< count
; m
++) {
935 metaslab_t
*msp
= vd
->vdev_ms
[m
];
940 kmem_free(vd
->vdev_ms
, count
* sizeof (metaslab_t
*));
945 typedef struct vdev_probe_stats
{
946 boolean_t vps_readable
;
947 boolean_t vps_writeable
;
949 } vdev_probe_stats_t
;
952 vdev_probe_done(zio_t
*zio
)
954 spa_t
*spa
= zio
->io_spa
;
955 vdev_t
*vd
= zio
->io_vd
;
956 vdev_probe_stats_t
*vps
= zio
->io_private
;
958 ASSERT(vd
->vdev_probe_zio
!= NULL
);
960 if (zio
->io_type
== ZIO_TYPE_READ
) {
961 if (zio
->io_error
== 0)
962 vps
->vps_readable
= 1;
963 if (zio
->io_error
== 0 && spa_writeable(spa
)) {
964 zio_nowait(zio_write_phys(vd
->vdev_probe_zio
, vd
,
965 zio
->io_offset
, zio
->io_size
, zio
->io_abd
,
966 ZIO_CHECKSUM_OFF
, vdev_probe_done
, vps
,
967 ZIO_PRIORITY_SYNC_WRITE
, vps
->vps_flags
, B_TRUE
));
969 abd_free(zio
->io_abd
);
971 } else if (zio
->io_type
== ZIO_TYPE_WRITE
) {
972 if (zio
->io_error
== 0)
973 vps
->vps_writeable
= 1;
974 abd_free(zio
->io_abd
);
975 } else if (zio
->io_type
== ZIO_TYPE_NULL
) {
978 vd
->vdev_cant_read
|= !vps
->vps_readable
;
979 vd
->vdev_cant_write
|= !vps
->vps_writeable
;
981 if (vdev_readable(vd
) &&
982 (vdev_writeable(vd
) || !spa_writeable(spa
))) {
985 ASSERT(zio
->io_error
!= 0);
986 zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE
,
987 spa
, vd
, NULL
, 0, 0);
988 zio
->io_error
= SET_ERROR(ENXIO
);
991 mutex_enter(&vd
->vdev_probe_lock
);
992 ASSERT(vd
->vdev_probe_zio
== zio
);
993 vd
->vdev_probe_zio
= NULL
;
994 mutex_exit(&vd
->vdev_probe_lock
);
996 zio_link_t
*zl
= NULL
;
997 while ((pio
= zio_walk_parents(zio
, &zl
)) != NULL
)
998 if (!vdev_accessible(vd
, pio
))
999 pio
->io_error
= SET_ERROR(ENXIO
);
1001 kmem_free(vps
, sizeof (*vps
));
1006 * Determine whether this device is accessible.
1008 * Read and write to several known locations: the pad regions of each
1009 * vdev label but the first, which we leave alone in case it contains
1013 vdev_probe(vdev_t
*vd
, zio_t
*zio
)
1015 spa_t
*spa
= vd
->vdev_spa
;
1016 vdev_probe_stats_t
*vps
= NULL
;
1019 ASSERT(vd
->vdev_ops
->vdev_op_leaf
);
1022 * Don't probe the probe.
1024 if (zio
&& (zio
->io_flags
& ZIO_FLAG_PROBE
))
1028 * To prevent 'probe storms' when a device fails, we create
1029 * just one probe i/o at a time. All zios that want to probe
1030 * this vdev will become parents of the probe io.
1032 mutex_enter(&vd
->vdev_probe_lock
);
1034 if ((pio
= vd
->vdev_probe_zio
) == NULL
) {
1035 vps
= kmem_zalloc(sizeof (*vps
), KM_SLEEP
);
1037 vps
->vps_flags
= ZIO_FLAG_CANFAIL
| ZIO_FLAG_PROBE
|
1038 ZIO_FLAG_DONT_CACHE
| ZIO_FLAG_DONT_AGGREGATE
|
1041 if (spa_config_held(spa
, SCL_ZIO
, RW_WRITER
)) {
1043 * vdev_cant_read and vdev_cant_write can only
1044 * transition from TRUE to FALSE when we have the
1045 * SCL_ZIO lock as writer; otherwise they can only
1046 * transition from FALSE to TRUE. This ensures that
1047 * any zio looking at these values can assume that
1048 * failures persist for the life of the I/O. That's
1049 * important because when a device has intermittent
1050 * connectivity problems, we want to ensure that
1051 * they're ascribed to the device (ENXIO) and not
1054 * Since we hold SCL_ZIO as writer here, clear both
1055 * values so the probe can reevaluate from first
1058 vps
->vps_flags
|= ZIO_FLAG_CONFIG_WRITER
;
1059 vd
->vdev_cant_read
= B_FALSE
;
1060 vd
->vdev_cant_write
= B_FALSE
;
1063 vd
->vdev_probe_zio
= pio
= zio_null(NULL
, spa
, vd
,
1064 vdev_probe_done
, vps
,
1065 vps
->vps_flags
| ZIO_FLAG_DONT_PROPAGATE
);
1068 * We can't change the vdev state in this context, so we
1069 * kick off an async task to do it on our behalf.
1072 vd
->vdev_probe_wanted
= B_TRUE
;
1073 spa_async_request(spa
, SPA_ASYNC_PROBE
);
1078 zio_add_child(zio
, pio
);
1080 mutex_exit(&vd
->vdev_probe_lock
);
1083 ASSERT(zio
!= NULL
);
1087 for (int l
= 1; l
< VDEV_LABELS
; l
++) {
1088 zio_nowait(zio_read_phys(pio
, vd
,
1089 vdev_label_offset(vd
->vdev_psize
, l
,
1090 offsetof(vdev_label_t
, vl_pad2
)), VDEV_PAD_SIZE
,
1091 abd_alloc_for_io(VDEV_PAD_SIZE
, B_TRUE
),
1092 ZIO_CHECKSUM_OFF
, vdev_probe_done
, vps
,
1093 ZIO_PRIORITY_SYNC_READ
, vps
->vps_flags
, B_TRUE
));
1104 vdev_open_child(void *arg
)
1108 vd
->vdev_open_thread
= curthread
;
1109 vd
->vdev_open_error
= vdev_open(vd
);
1110 vd
->vdev_open_thread
= NULL
;
1114 vdev_uses_zvols(vdev_t
*vd
)
1116 if (vd
->vdev_path
&& strncmp(vd
->vdev_path
, ZVOL_DIR
,
1117 strlen(ZVOL_DIR
)) == 0)
1119 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1120 if (vdev_uses_zvols(vd
->vdev_child
[c
]))
1126 vdev_open_children(vdev_t
*vd
)
1129 int children
= vd
->vdev_children
;
1132 * in order to handle pools on top of zvols, do the opens
1133 * in a single thread so that the same thread holds the
1134 * spa_namespace_lock
1136 if (vdev_uses_zvols(vd
)) {
1137 for (int c
= 0; c
< children
; c
++)
1138 vd
->vdev_child
[c
]->vdev_open_error
=
1139 vdev_open(vd
->vdev_child
[c
]);
1142 tq
= taskq_create("vdev_open", children
, minclsyspri
,
1143 children
, children
, TASKQ_PREPOPULATE
);
1145 for (int c
= 0; c
< children
; c
++)
1146 VERIFY(taskq_dispatch(tq
, vdev_open_child
, vd
->vdev_child
[c
],
1153 * Prepare a virtual device for access.
1156 vdev_open(vdev_t
*vd
)
1158 spa_t
*spa
= vd
->vdev_spa
;
1161 uint64_t max_osize
= 0;
1162 uint64_t asize
, max_asize
, psize
;
1163 uint64_t ashift
= 0;
1165 ASSERT(vd
->vdev_open_thread
== curthread
||
1166 spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
1167 ASSERT(vd
->vdev_state
== VDEV_STATE_CLOSED
||
1168 vd
->vdev_state
== VDEV_STATE_CANT_OPEN
||
1169 vd
->vdev_state
== VDEV_STATE_OFFLINE
);
1171 vd
->vdev_stat
.vs_aux
= VDEV_AUX_NONE
;
1172 vd
->vdev_cant_read
= B_FALSE
;
1173 vd
->vdev_cant_write
= B_FALSE
;
1174 vd
->vdev_min_asize
= vdev_get_min_asize(vd
);
1177 * If this vdev is not removed, check its fault status. If it's
1178 * faulted, bail out of the open.
1180 if (!vd
->vdev_removed
&& vd
->vdev_faulted
) {
1181 ASSERT(vd
->vdev_children
== 0);
1182 ASSERT(vd
->vdev_label_aux
== VDEV_AUX_ERR_EXCEEDED
||
1183 vd
->vdev_label_aux
== VDEV_AUX_EXTERNAL
);
1184 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_FAULTED
,
1185 vd
->vdev_label_aux
);
1186 return (SET_ERROR(ENXIO
));
1187 } else if (vd
->vdev_offline
) {
1188 ASSERT(vd
->vdev_children
== 0);
1189 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_OFFLINE
, VDEV_AUX_NONE
);
1190 return (SET_ERROR(ENXIO
));
1193 error
= vd
->vdev_ops
->vdev_op_open(vd
, &osize
, &max_osize
, &ashift
);
1196 * Reset the vdev_reopening flag so that we actually close
1197 * the vdev on error.
1199 vd
->vdev_reopening
= B_FALSE
;
1200 if (zio_injection_enabled
&& error
== 0)
1201 error
= zio_handle_device_injection(vd
, NULL
, ENXIO
);
1204 if (vd
->vdev_removed
&&
1205 vd
->vdev_stat
.vs_aux
!= VDEV_AUX_OPEN_FAILED
)
1206 vd
->vdev_removed
= B_FALSE
;
1208 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1209 vd
->vdev_stat
.vs_aux
);
1213 vd
->vdev_removed
= B_FALSE
;
1216 * Recheck the faulted flag now that we have confirmed that
1217 * the vdev is accessible. If we're faulted, bail.
1219 if (vd
->vdev_faulted
) {
1220 ASSERT(vd
->vdev_children
== 0);
1221 ASSERT(vd
->vdev_label_aux
== VDEV_AUX_ERR_EXCEEDED
||
1222 vd
->vdev_label_aux
== VDEV_AUX_EXTERNAL
);
1223 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_FAULTED
,
1224 vd
->vdev_label_aux
);
1225 return (SET_ERROR(ENXIO
));
1228 if (vd
->vdev_degraded
) {
1229 ASSERT(vd
->vdev_children
== 0);
1230 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_DEGRADED
,
1231 VDEV_AUX_ERR_EXCEEDED
);
1233 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_HEALTHY
, 0);
1237 * For hole or missing vdevs we just return success.
1239 if (vd
->vdev_ishole
|| vd
->vdev_ops
== &vdev_missing_ops
)
1242 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
1243 if (vd
->vdev_child
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
) {
1244 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_DEGRADED
,
1250 osize
= P2ALIGN(osize
, (uint64_t)sizeof (vdev_label_t
));
1251 max_osize
= P2ALIGN(max_osize
, (uint64_t)sizeof (vdev_label_t
));
1253 if (vd
->vdev_children
== 0) {
1254 if (osize
< SPA_MINDEVSIZE
) {
1255 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1256 VDEV_AUX_TOO_SMALL
);
1257 return (SET_ERROR(EOVERFLOW
));
1260 asize
= osize
- (VDEV_LABEL_START_SIZE
+ VDEV_LABEL_END_SIZE
);
1261 max_asize
= max_osize
- (VDEV_LABEL_START_SIZE
+
1262 VDEV_LABEL_END_SIZE
);
1264 if (vd
->vdev_parent
!= NULL
&& osize
< SPA_MINDEVSIZE
-
1265 (VDEV_LABEL_START_SIZE
+ VDEV_LABEL_END_SIZE
)) {
1266 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1267 VDEV_AUX_TOO_SMALL
);
1268 return (SET_ERROR(EOVERFLOW
));
1272 max_asize
= max_osize
;
1275 vd
->vdev_psize
= psize
;
1278 * Make sure the allocatable size hasn't shrunk too much.
1280 if (asize
< vd
->vdev_min_asize
) {
1281 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1282 VDEV_AUX_BAD_LABEL
);
1283 return (SET_ERROR(EINVAL
));
1286 if (vd
->vdev_asize
== 0) {
1288 * This is the first-ever open, so use the computed values.
1289 * For testing purposes, a higher ashift can be requested.
1291 vd
->vdev_asize
= asize
;
1292 vd
->vdev_max_asize
= max_asize
;
1293 vd
->vdev_ashift
= MAX(ashift
, vd
->vdev_ashift
);
1296 * Detect if the alignment requirement has increased.
1297 * We don't want to make the pool unavailable, just
1298 * issue a warning instead.
1300 if (ashift
> vd
->vdev_top
->vdev_ashift
&&
1301 vd
->vdev_ops
->vdev_op_leaf
) {
1303 "Disk, '%s', has a block alignment that is "
1304 "larger than the pool's alignment\n",
1307 vd
->vdev_max_asize
= max_asize
;
1311 * If all children are healthy we update asize if either:
1312 * The asize has increased, due to a device expansion caused by dynamic
1313 * LUN growth or vdev replacement, and automatic expansion is enabled;
1314 * making the additional space available.
1316 * The asize has decreased, due to a device shrink usually caused by a
1317 * vdev replace with a smaller device. This ensures that calculations
1318 * based of max_asize and asize e.g. esize are always valid. It's safe
1319 * to do this as we've already validated that asize is greater than
1322 if (vd
->vdev_state
== VDEV_STATE_HEALTHY
&&
1323 ((asize
> vd
->vdev_asize
&&
1324 (vd
->vdev_expanding
|| spa
->spa_autoexpand
)) ||
1325 (asize
< vd
->vdev_asize
)))
1326 vd
->vdev_asize
= asize
;
1328 vdev_set_min_asize(vd
);
1331 * Ensure we can issue some IO before declaring the
1332 * vdev open for business.
1334 if (vd
->vdev_ops
->vdev_op_leaf
&&
1335 (error
= zio_wait(vdev_probe(vd
, NULL
))) != 0) {
1336 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_FAULTED
,
1337 VDEV_AUX_ERR_EXCEEDED
);
1342 * Track the min and max ashift values for normal data devices.
1344 if (vd
->vdev_top
== vd
&& vd
->vdev_ashift
!= 0 &&
1345 !vd
->vdev_islog
&& vd
->vdev_aux
== NULL
) {
1346 if (vd
->vdev_ashift
> spa
->spa_max_ashift
)
1347 spa
->spa_max_ashift
= vd
->vdev_ashift
;
1348 if (vd
->vdev_ashift
< spa
->spa_min_ashift
)
1349 spa
->spa_min_ashift
= vd
->vdev_ashift
;
1353 * If a leaf vdev has a DTL, and seems healthy, then kick off a
1354 * resilver. But don't do this if we are doing a reopen for a scrub,
1355 * since this would just restart the scrub we are already doing.
1357 if (vd
->vdev_ops
->vdev_op_leaf
&& !spa
->spa_scrub_reopen
&&
1358 vdev_resilver_needed(vd
, NULL
, NULL
))
1359 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
1365 * Called once the vdevs are all opened, this routine validates the label
1366 * contents. This needs to be done before vdev_load() so that we don't
1367 * inadvertently do repair I/Os to the wrong device.
1369 * If 'strict' is false ignore the spa guid check. This is necessary because
1370 * if the machine crashed during a re-guid the new guid might have been written
1371 * to all of the vdev labels, but not the cached config. The strict check
1372 * will be performed when the pool is opened again using the mos config.
1374 * This function will only return failure if one of the vdevs indicates that it
1375 * has since been destroyed or exported. This is only possible if
1376 * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state
1377 * will be updated but the function will return 0.
1380 vdev_validate(vdev_t
*vd
, boolean_t strict
)
1382 spa_t
*spa
= vd
->vdev_spa
;
1384 uint64_t guid
= 0, top_guid
;
1387 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1388 if (vdev_validate(vd
->vdev_child
[c
], strict
) != 0)
1389 return (SET_ERROR(EBADF
));
1392 * If the device has already failed, or was marked offline, don't do
1393 * any further validation. Otherwise, label I/O will fail and we will
1394 * overwrite the previous state.
1396 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_readable(vd
)) {
1397 uint64_t aux_guid
= 0;
1399 uint64_t txg
= spa_last_synced_txg(spa
) != 0 ?
1400 spa_last_synced_txg(spa
) : -1ULL;
1402 if ((label
= vdev_label_read_config(vd
, txg
)) == NULL
) {
1403 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
1404 VDEV_AUX_BAD_LABEL
);
1409 * Determine if this vdev has been split off into another
1410 * pool. If so, then refuse to open it.
1412 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_SPLIT_GUID
,
1413 &aux_guid
) == 0 && aux_guid
== spa_guid(spa
)) {
1414 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1415 VDEV_AUX_SPLIT_POOL
);
1420 if (strict
&& (nvlist_lookup_uint64(label
,
1421 ZPOOL_CONFIG_POOL_GUID
, &guid
) != 0 ||
1422 guid
!= spa_guid(spa
))) {
1423 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1424 VDEV_AUX_CORRUPT_DATA
);
1429 if (nvlist_lookup_nvlist(label
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
)
1430 != 0 || nvlist_lookup_uint64(nvl
, ZPOOL_CONFIG_ORIG_GUID
,
1435 * If this vdev just became a top-level vdev because its
1436 * sibling was detached, it will have adopted the parent's
1437 * vdev guid -- but the label may or may not be on disk yet.
1438 * Fortunately, either version of the label will have the
1439 * same top guid, so if we're a top-level vdev, we can
1440 * safely compare to that instead.
1442 * If we split this vdev off instead, then we also check the
1443 * original pool's guid. We don't want to consider the vdev
1444 * corrupt if it is partway through a split operation.
1446 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_GUID
,
1448 nvlist_lookup_uint64(label
, ZPOOL_CONFIG_TOP_GUID
,
1450 ((vd
->vdev_guid
!= guid
&& vd
->vdev_guid
!= aux_guid
) &&
1451 (vd
->vdev_guid
!= top_guid
|| vd
!= vd
->vdev_top
))) {
1452 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1453 VDEV_AUX_CORRUPT_DATA
);
1458 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_STATE
,
1460 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
1461 VDEV_AUX_CORRUPT_DATA
);
1469 * If this is a verbatim import, no need to check the
1470 * state of the pool.
1472 if (!(spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) &&
1473 spa_load_state(spa
) == SPA_LOAD_OPEN
&&
1474 state
!= POOL_STATE_ACTIVE
)
1475 return (SET_ERROR(EBADF
));
1478 * If we were able to open and validate a vdev that was
1479 * previously marked permanently unavailable, clear that state
1482 if (vd
->vdev_not_present
)
1483 vd
->vdev_not_present
= 0;
1490 * Close a virtual device.
1493 vdev_close(vdev_t
*vd
)
1495 spa_t
*spa
= vd
->vdev_spa
;
1496 vdev_t
*pvd
= vd
->vdev_parent
;
1498 ASSERT(spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
1501 * If our parent is reopening, then we are as well, unless we are
1504 if (pvd
!= NULL
&& pvd
->vdev_reopening
)
1505 vd
->vdev_reopening
= (pvd
->vdev_reopening
&& !vd
->vdev_offline
);
1507 vd
->vdev_ops
->vdev_op_close(vd
);
1509 vdev_cache_purge(vd
);
1512 * We record the previous state before we close it, so that if we are
1513 * doing a reopen(), we don't generate FMA ereports if we notice that
1514 * it's still faulted.
1516 vd
->vdev_prevstate
= vd
->vdev_state
;
1518 if (vd
->vdev_offline
)
1519 vd
->vdev_state
= VDEV_STATE_OFFLINE
;
1521 vd
->vdev_state
= VDEV_STATE_CLOSED
;
1522 vd
->vdev_stat
.vs_aux
= VDEV_AUX_NONE
;
1526 vdev_hold(vdev_t
*vd
)
1528 spa_t
*spa
= vd
->vdev_spa
;
1530 ASSERT(spa_is_root(spa
));
1531 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
)
1534 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1535 vdev_hold(vd
->vdev_child
[c
]);
1537 if (vd
->vdev_ops
->vdev_op_leaf
)
1538 vd
->vdev_ops
->vdev_op_hold(vd
);
1542 vdev_rele(vdev_t
*vd
)
1544 spa_t
*spa
= vd
->vdev_spa
;
1546 ASSERT(spa_is_root(spa
));
1547 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1548 vdev_rele(vd
->vdev_child
[c
]);
1550 if (vd
->vdev_ops
->vdev_op_leaf
)
1551 vd
->vdev_ops
->vdev_op_rele(vd
);
1555 * Reopen all interior vdevs and any unopened leaves. We don't actually
1556 * reopen leaf vdevs which had previously been opened as they might deadlock
1557 * on the spa_config_lock. Instead we only obtain the leaf's physical size.
1558 * If the leaf has never been opened then open it, as usual.
1561 vdev_reopen(vdev_t
*vd
)
1563 spa_t
*spa
= vd
->vdev_spa
;
1565 ASSERT(spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
1567 /* set the reopening flag unless we're taking the vdev offline */
1568 vd
->vdev_reopening
= !vd
->vdev_offline
;
1570 (void) vdev_open(vd
);
1573 * Call vdev_validate() here to make sure we have the same device.
1574 * Otherwise, a device with an invalid label could be successfully
1575 * opened in response to vdev_reopen().
1578 (void) vdev_validate_aux(vd
);
1579 if (vdev_readable(vd
) && vdev_writeable(vd
) &&
1580 vd
->vdev_aux
== &spa
->spa_l2cache
&&
1581 !l2arc_vdev_present(vd
))
1582 l2arc_add_vdev(spa
, vd
);
1584 (void) vdev_validate(vd
, B_TRUE
);
1588 * Reassess parent vdev's health.
1590 vdev_propagate_state(vd
);
1594 vdev_create(vdev_t
*vd
, uint64_t txg
, boolean_t isreplacing
)
1599 * Normally, partial opens (e.g. of a mirror) are allowed.
1600 * For a create, however, we want to fail the request if
1601 * there are any components we can't open.
1603 error
= vdev_open(vd
);
1605 if (error
|| vd
->vdev_state
!= VDEV_STATE_HEALTHY
) {
1607 return (error
? error
: ENXIO
);
1611 * Recursively load DTLs and initialize all labels.
1613 if ((error
= vdev_dtl_load(vd
)) != 0 ||
1614 (error
= vdev_label_init(vd
, txg
, isreplacing
?
1615 VDEV_LABEL_REPLACE
: VDEV_LABEL_CREATE
)) != 0) {
1624 vdev_metaslab_set_size(vdev_t
*vd
)
1627 * Aim for roughly metaslabs_per_vdev (default 200) metaslabs per vdev.
1629 vd
->vdev_ms_shift
= highbit64(vd
->vdev_asize
/ metaslabs_per_vdev
);
1630 vd
->vdev_ms_shift
= MAX(vd
->vdev_ms_shift
, SPA_MAXBLOCKSHIFT
);
1634 vdev_dirty(vdev_t
*vd
, int flags
, void *arg
, uint64_t txg
)
1636 ASSERT(vd
== vd
->vdev_top
);
1637 ASSERT(!vd
->vdev_ishole
);
1638 ASSERT(ISP2(flags
));
1639 ASSERT(spa_writeable(vd
->vdev_spa
));
1641 if (flags
& VDD_METASLAB
)
1642 (void) txg_list_add(&vd
->vdev_ms_list
, arg
, txg
);
1644 if (flags
& VDD_DTL
)
1645 (void) txg_list_add(&vd
->vdev_dtl_list
, arg
, txg
);
1647 (void) txg_list_add(&vd
->vdev_spa
->spa_vdev_txg_list
, vd
, txg
);
1651 vdev_dirty_leaves(vdev_t
*vd
, int flags
, uint64_t txg
)
1653 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1654 vdev_dirty_leaves(vd
->vdev_child
[c
], flags
, txg
);
1656 if (vd
->vdev_ops
->vdev_op_leaf
)
1657 vdev_dirty(vd
->vdev_top
, flags
, vd
, txg
);
1663 * A vdev's DTL (dirty time log) is the set of transaction groups for which
1664 * the vdev has less than perfect replication. There are four kinds of DTL:
1666 * DTL_MISSING: txgs for which the vdev has no valid copies of the data
1668 * DTL_PARTIAL: txgs for which data is available, but not fully replicated
1670 * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon
1671 * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of
1672 * txgs that was scrubbed.
1674 * DTL_OUTAGE: txgs which cannot currently be read, whether due to
1675 * persistent errors or just some device being offline.
1676 * Unlike the other three, the DTL_OUTAGE map is not generally
1677 * maintained; it's only computed when needed, typically to
1678 * determine whether a device can be detached.
1680 * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device
1681 * either has the data or it doesn't.
1683 * For interior vdevs such as mirror and RAID-Z the picture is more complex.
1684 * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because
1685 * if any child is less than fully replicated, then so is its parent.
1686 * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs,
1687 * comprising only those txgs which appear in 'maxfaults' or more children;
1688 * those are the txgs we don't have enough replication to read. For example,
1689 * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2);
1690 * thus, its DTL_MISSING consists of the set of txgs that appear in more than
1691 * two child DTL_MISSING maps.
1693 * It should be clear from the above that to compute the DTLs and outage maps
1694 * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps.
1695 * Therefore, that is all we keep on disk. When loading the pool, or after
1696 * a configuration change, we generate all other DTLs from first principles.
1699 vdev_dtl_dirty(vdev_t
*vd
, vdev_dtl_type_t t
, uint64_t txg
, uint64_t size
)
1701 range_tree_t
*rt
= vd
->vdev_dtl
[t
];
1703 ASSERT(t
< DTL_TYPES
);
1704 ASSERT(vd
!= vd
->vdev_spa
->spa_root_vdev
);
1705 ASSERT(spa_writeable(vd
->vdev_spa
));
1707 mutex_enter(rt
->rt_lock
);
1708 if (!range_tree_contains(rt
, txg
, size
))
1709 range_tree_add(rt
, txg
, size
);
1710 mutex_exit(rt
->rt_lock
);
1714 vdev_dtl_contains(vdev_t
*vd
, vdev_dtl_type_t t
, uint64_t txg
, uint64_t size
)
1716 range_tree_t
*rt
= vd
->vdev_dtl
[t
];
1717 boolean_t dirty
= B_FALSE
;
1719 ASSERT(t
< DTL_TYPES
);
1720 ASSERT(vd
!= vd
->vdev_spa
->spa_root_vdev
);
1722 mutex_enter(rt
->rt_lock
);
1723 if (range_tree_space(rt
) != 0)
1724 dirty
= range_tree_contains(rt
, txg
, size
);
1725 mutex_exit(rt
->rt_lock
);
1731 vdev_dtl_empty(vdev_t
*vd
, vdev_dtl_type_t t
)
1733 range_tree_t
*rt
= vd
->vdev_dtl
[t
];
1736 mutex_enter(rt
->rt_lock
);
1737 empty
= (range_tree_space(rt
) == 0);
1738 mutex_exit(rt
->rt_lock
);
1744 * Returns the lowest txg in the DTL range.
1747 vdev_dtl_min(vdev_t
*vd
)
1751 ASSERT(MUTEX_HELD(&vd
->vdev_dtl_lock
));
1752 ASSERT3U(range_tree_space(vd
->vdev_dtl
[DTL_MISSING
]), !=, 0);
1753 ASSERT0(vd
->vdev_children
);
1755 rs
= avl_first(&vd
->vdev_dtl
[DTL_MISSING
]->rt_root
);
1756 return (rs
->rs_start
- 1);
1760 * Returns the highest txg in the DTL.
1763 vdev_dtl_max(vdev_t
*vd
)
1767 ASSERT(MUTEX_HELD(&vd
->vdev_dtl_lock
));
1768 ASSERT3U(range_tree_space(vd
->vdev_dtl
[DTL_MISSING
]), !=, 0);
1769 ASSERT0(vd
->vdev_children
);
1771 rs
= avl_last(&vd
->vdev_dtl
[DTL_MISSING
]->rt_root
);
1772 return (rs
->rs_end
);
1776 * Determine if a resilvering vdev should remove any DTL entries from
1777 * its range. If the vdev was resilvering for the entire duration of the
1778 * scan then it should excise that range from its DTLs. Otherwise, this
1779 * vdev is considered partially resilvered and should leave its DTL
1780 * entries intact. The comment in vdev_dtl_reassess() describes how we
1784 vdev_dtl_should_excise(vdev_t
*vd
)
1786 spa_t
*spa
= vd
->vdev_spa
;
1787 dsl_scan_t
*scn
= spa
->spa_dsl_pool
->dp_scan
;
1789 ASSERT0(scn
->scn_phys
.scn_errors
);
1790 ASSERT0(vd
->vdev_children
);
1792 if (vd
->vdev_state
< VDEV_STATE_DEGRADED
)
1795 if (vd
->vdev_resilver_txg
== 0 ||
1796 range_tree_space(vd
->vdev_dtl
[DTL_MISSING
]) == 0)
1800 * When a resilver is initiated the scan will assign the scn_max_txg
1801 * value to the highest txg value that exists in all DTLs. If this
1802 * device's max DTL is not part of this scan (i.e. it is not in
1803 * the range (scn_min_txg, scn_max_txg] then it is not eligible
1806 if (vdev_dtl_max(vd
) <= scn
->scn_phys
.scn_max_txg
) {
1807 ASSERT3U(scn
->scn_phys
.scn_min_txg
, <=, vdev_dtl_min(vd
));
1808 ASSERT3U(scn
->scn_phys
.scn_min_txg
, <, vd
->vdev_resilver_txg
);
1809 ASSERT3U(vd
->vdev_resilver_txg
, <=, scn
->scn_phys
.scn_max_txg
);
1816 * Reassess DTLs after a config change or scrub completion.
1819 vdev_dtl_reassess(vdev_t
*vd
, uint64_t txg
, uint64_t scrub_txg
, int scrub_done
)
1821 spa_t
*spa
= vd
->vdev_spa
;
1825 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_READER
) != 0);
1827 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1828 vdev_dtl_reassess(vd
->vdev_child
[c
], txg
,
1829 scrub_txg
, scrub_done
);
1831 if (vd
== spa
->spa_root_vdev
|| vd
->vdev_ishole
|| vd
->vdev_aux
)
1834 if (vd
->vdev_ops
->vdev_op_leaf
) {
1835 dsl_scan_t
*scn
= spa
->spa_dsl_pool
->dp_scan
;
1837 mutex_enter(&vd
->vdev_dtl_lock
);
1840 * If we've completed a scan cleanly then determine
1841 * if this vdev should remove any DTLs. We only want to
1842 * excise regions on vdevs that were available during
1843 * the entire duration of this scan.
1845 if (scrub_txg
!= 0 &&
1846 (spa
->spa_scrub_started
||
1847 (scn
!= NULL
&& scn
->scn_phys
.scn_errors
== 0)) &&
1848 vdev_dtl_should_excise(vd
)) {
1850 * We completed a scrub up to scrub_txg. If we
1851 * did it without rebooting, then the scrub dtl
1852 * will be valid, so excise the old region and
1853 * fold in the scrub dtl. Otherwise, leave the
1854 * dtl as-is if there was an error.
1856 * There's little trick here: to excise the beginning
1857 * of the DTL_MISSING map, we put it into a reference
1858 * tree and then add a segment with refcnt -1 that
1859 * covers the range [0, scrub_txg). This means
1860 * that each txg in that range has refcnt -1 or 0.
1861 * We then add DTL_SCRUB with a refcnt of 2, so that
1862 * entries in the range [0, scrub_txg) will have a
1863 * positive refcnt -- either 1 or 2. We then convert
1864 * the reference tree into the new DTL_MISSING map.
1866 space_reftree_create(&reftree
);
1867 space_reftree_add_map(&reftree
,
1868 vd
->vdev_dtl
[DTL_MISSING
], 1);
1869 space_reftree_add_seg(&reftree
, 0, scrub_txg
, -1);
1870 space_reftree_add_map(&reftree
,
1871 vd
->vdev_dtl
[DTL_SCRUB
], 2);
1872 space_reftree_generate_map(&reftree
,
1873 vd
->vdev_dtl
[DTL_MISSING
], 1);
1874 space_reftree_destroy(&reftree
);
1876 range_tree_vacate(vd
->vdev_dtl
[DTL_PARTIAL
], NULL
, NULL
);
1877 range_tree_walk(vd
->vdev_dtl
[DTL_MISSING
],
1878 range_tree_add
, vd
->vdev_dtl
[DTL_PARTIAL
]);
1880 range_tree_vacate(vd
->vdev_dtl
[DTL_SCRUB
], NULL
, NULL
);
1881 range_tree_vacate(vd
->vdev_dtl
[DTL_OUTAGE
], NULL
, NULL
);
1882 if (!vdev_readable(vd
))
1883 range_tree_add(vd
->vdev_dtl
[DTL_OUTAGE
], 0, -1ULL);
1885 range_tree_walk(vd
->vdev_dtl
[DTL_MISSING
],
1886 range_tree_add
, vd
->vdev_dtl
[DTL_OUTAGE
]);
1889 * If the vdev was resilvering and no longer has any
1890 * DTLs then reset its resilvering flag.
1892 if (vd
->vdev_resilver_txg
!= 0 &&
1893 range_tree_space(vd
->vdev_dtl
[DTL_MISSING
]) == 0 &&
1894 range_tree_space(vd
->vdev_dtl
[DTL_OUTAGE
]) == 0)
1895 vd
->vdev_resilver_txg
= 0;
1897 mutex_exit(&vd
->vdev_dtl_lock
);
1900 vdev_dirty(vd
->vdev_top
, VDD_DTL
, vd
, txg
);
1904 mutex_enter(&vd
->vdev_dtl_lock
);
1905 for (int t
= 0; t
< DTL_TYPES
; t
++) {
1906 /* account for child's outage in parent's missing map */
1907 int s
= (t
== DTL_MISSING
) ? DTL_OUTAGE
: t
;
1909 continue; /* leaf vdevs only */
1910 if (t
== DTL_PARTIAL
)
1911 minref
= 1; /* i.e. non-zero */
1912 else if (vd
->vdev_nparity
!= 0)
1913 minref
= vd
->vdev_nparity
+ 1; /* RAID-Z */
1915 minref
= vd
->vdev_children
; /* any kind of mirror */
1916 space_reftree_create(&reftree
);
1917 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
1918 vdev_t
*cvd
= vd
->vdev_child
[c
];
1919 mutex_enter(&cvd
->vdev_dtl_lock
);
1920 space_reftree_add_map(&reftree
, cvd
->vdev_dtl
[s
], 1);
1921 mutex_exit(&cvd
->vdev_dtl_lock
);
1923 space_reftree_generate_map(&reftree
, vd
->vdev_dtl
[t
], minref
);
1924 space_reftree_destroy(&reftree
);
1926 mutex_exit(&vd
->vdev_dtl_lock
);
1930 vdev_dtl_load(vdev_t
*vd
)
1932 spa_t
*spa
= vd
->vdev_spa
;
1933 objset_t
*mos
= spa
->spa_meta_objset
;
1936 if (vd
->vdev_ops
->vdev_op_leaf
&& vd
->vdev_dtl_object
!= 0) {
1937 ASSERT(!vd
->vdev_ishole
);
1939 error
= space_map_open(&vd
->vdev_dtl_sm
, mos
,
1940 vd
->vdev_dtl_object
, 0, -1ULL, 0, &vd
->vdev_dtl_lock
);
1943 ASSERT(vd
->vdev_dtl_sm
!= NULL
);
1945 mutex_enter(&vd
->vdev_dtl_lock
);
1948 * Now that we've opened the space_map we need to update
1951 space_map_update(vd
->vdev_dtl_sm
);
1953 error
= space_map_load(vd
->vdev_dtl_sm
,
1954 vd
->vdev_dtl
[DTL_MISSING
], SM_ALLOC
);
1955 mutex_exit(&vd
->vdev_dtl_lock
);
1960 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
1961 error
= vdev_dtl_load(vd
->vdev_child
[c
]);
1970 vdev_destroy_unlink_zap(vdev_t
*vd
, uint64_t zapobj
, dmu_tx_t
*tx
)
1972 spa_t
*spa
= vd
->vdev_spa
;
1974 VERIFY0(zap_destroy(spa
->spa_meta_objset
, zapobj
, tx
));
1975 VERIFY0(zap_remove_int(spa
->spa_meta_objset
, spa
->spa_all_vdev_zaps
,
1980 vdev_create_link_zap(vdev_t
*vd
, dmu_tx_t
*tx
)
1982 spa_t
*spa
= vd
->vdev_spa
;
1983 uint64_t zap
= zap_create(spa
->spa_meta_objset
, DMU_OTN_ZAP_METADATA
,
1984 DMU_OT_NONE
, 0, tx
);
1987 VERIFY0(zap_add_int(spa
->spa_meta_objset
, spa
->spa_all_vdev_zaps
,
1994 vdev_construct_zaps(vdev_t
*vd
, dmu_tx_t
*tx
)
1996 if (vd
->vdev_ops
!= &vdev_hole_ops
&&
1997 vd
->vdev_ops
!= &vdev_missing_ops
&&
1998 vd
->vdev_ops
!= &vdev_root_ops
&&
1999 !vd
->vdev_top
->vdev_removing
) {
2000 if (vd
->vdev_ops
->vdev_op_leaf
&& vd
->vdev_leaf_zap
== 0) {
2001 vd
->vdev_leaf_zap
= vdev_create_link_zap(vd
, tx
);
2003 if (vd
== vd
->vdev_top
&& vd
->vdev_top_zap
== 0) {
2004 vd
->vdev_top_zap
= vdev_create_link_zap(vd
, tx
);
2007 for (uint64_t i
= 0; i
< vd
->vdev_children
; i
++) {
2008 vdev_construct_zaps(vd
->vdev_child
[i
], tx
);
2013 vdev_dtl_sync(vdev_t
*vd
, uint64_t txg
)
2015 spa_t
*spa
= vd
->vdev_spa
;
2016 range_tree_t
*rt
= vd
->vdev_dtl
[DTL_MISSING
];
2017 objset_t
*mos
= spa
->spa_meta_objset
;
2018 range_tree_t
*rtsync
;
2021 uint64_t object
= space_map_object(vd
->vdev_dtl_sm
);
2023 ASSERT(!vd
->vdev_ishole
);
2024 ASSERT(vd
->vdev_ops
->vdev_op_leaf
);
2026 tx
= dmu_tx_create_assigned(spa
->spa_dsl_pool
, txg
);
2028 if (vd
->vdev_detached
|| vd
->vdev_top
->vdev_removing
) {
2029 mutex_enter(&vd
->vdev_dtl_lock
);
2030 space_map_free(vd
->vdev_dtl_sm
, tx
);
2031 space_map_close(vd
->vdev_dtl_sm
);
2032 vd
->vdev_dtl_sm
= NULL
;
2033 mutex_exit(&vd
->vdev_dtl_lock
);
2036 * We only destroy the leaf ZAP for detached leaves or for
2037 * removed log devices. Removed data devices handle leaf ZAP
2038 * cleanup later, once cancellation is no longer possible.
2040 if (vd
->vdev_leaf_zap
!= 0 && (vd
->vdev_detached
||
2041 vd
->vdev_top
->vdev_islog
)) {
2042 vdev_destroy_unlink_zap(vd
, vd
->vdev_leaf_zap
, tx
);
2043 vd
->vdev_leaf_zap
= 0;
2050 if (vd
->vdev_dtl_sm
== NULL
) {
2051 uint64_t new_object
;
2053 new_object
= space_map_alloc(mos
, tx
);
2054 VERIFY3U(new_object
, !=, 0);
2056 VERIFY0(space_map_open(&vd
->vdev_dtl_sm
, mos
, new_object
,
2057 0, -1ULL, 0, &vd
->vdev_dtl_lock
));
2058 ASSERT(vd
->vdev_dtl_sm
!= NULL
);
2061 mutex_init(&rtlock
, NULL
, MUTEX_DEFAULT
, NULL
);
2063 rtsync
= range_tree_create(NULL
, NULL
, &rtlock
);
2065 mutex_enter(&rtlock
);
2067 mutex_enter(&vd
->vdev_dtl_lock
);
2068 range_tree_walk(rt
, range_tree_add
, rtsync
);
2069 mutex_exit(&vd
->vdev_dtl_lock
);
2071 space_map_truncate(vd
->vdev_dtl_sm
, tx
);
2072 space_map_write(vd
->vdev_dtl_sm
, rtsync
, SM_ALLOC
, tx
);
2073 range_tree_vacate(rtsync
, NULL
, NULL
);
2075 range_tree_destroy(rtsync
);
2077 mutex_exit(&rtlock
);
2078 mutex_destroy(&rtlock
);
2081 * If the object for the space map has changed then dirty
2082 * the top level so that we update the config.
2084 if (object
!= space_map_object(vd
->vdev_dtl_sm
)) {
2085 zfs_dbgmsg("txg %llu, spa %s, DTL old object %llu, "
2086 "new object %llu", txg
, spa_name(spa
), object
,
2087 space_map_object(vd
->vdev_dtl_sm
));
2088 vdev_config_dirty(vd
->vdev_top
);
2093 mutex_enter(&vd
->vdev_dtl_lock
);
2094 space_map_update(vd
->vdev_dtl_sm
);
2095 mutex_exit(&vd
->vdev_dtl_lock
);
2099 * Determine whether the specified vdev can be offlined/detached/removed
2100 * without losing data.
2103 vdev_dtl_required(vdev_t
*vd
)
2105 spa_t
*spa
= vd
->vdev_spa
;
2106 vdev_t
*tvd
= vd
->vdev_top
;
2107 uint8_t cant_read
= vd
->vdev_cant_read
;
2110 ASSERT(spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
2112 if (vd
== spa
->spa_root_vdev
|| vd
== tvd
)
2116 * Temporarily mark the device as unreadable, and then determine
2117 * whether this results in any DTL outages in the top-level vdev.
2118 * If not, we can safely offline/detach/remove the device.
2120 vd
->vdev_cant_read
= B_TRUE
;
2121 vdev_dtl_reassess(tvd
, 0, 0, B_FALSE
);
2122 required
= !vdev_dtl_empty(tvd
, DTL_OUTAGE
);
2123 vd
->vdev_cant_read
= cant_read
;
2124 vdev_dtl_reassess(tvd
, 0, 0, B_FALSE
);
2126 if (!required
&& zio_injection_enabled
)
2127 required
= !!zio_handle_device_injection(vd
, NULL
, ECHILD
);
2133 * Determine if resilver is needed, and if so the txg range.
2136 vdev_resilver_needed(vdev_t
*vd
, uint64_t *minp
, uint64_t *maxp
)
2138 boolean_t needed
= B_FALSE
;
2139 uint64_t thismin
= UINT64_MAX
;
2140 uint64_t thismax
= 0;
2142 if (vd
->vdev_children
== 0) {
2143 mutex_enter(&vd
->vdev_dtl_lock
);
2144 if (range_tree_space(vd
->vdev_dtl
[DTL_MISSING
]) != 0 &&
2145 vdev_writeable(vd
)) {
2147 thismin
= vdev_dtl_min(vd
);
2148 thismax
= vdev_dtl_max(vd
);
2151 mutex_exit(&vd
->vdev_dtl_lock
);
2153 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
2154 vdev_t
*cvd
= vd
->vdev_child
[c
];
2155 uint64_t cmin
, cmax
;
2157 if (vdev_resilver_needed(cvd
, &cmin
, &cmax
)) {
2158 thismin
= MIN(thismin
, cmin
);
2159 thismax
= MAX(thismax
, cmax
);
2165 if (needed
&& minp
) {
2173 vdev_load(vdev_t
*vd
)
2176 * Recursively load all children.
2178 for (int c
= 0; c
< vd
->vdev_children
; c
++)
2179 vdev_load(vd
->vdev_child
[c
]);
2182 * If this is a top-level vdev, initialize its metaslabs.
2184 if (vd
== vd
->vdev_top
&& !vd
->vdev_ishole
&&
2185 (vd
->vdev_ashift
== 0 || vd
->vdev_asize
== 0 ||
2186 vdev_metaslab_init(vd
, 0) != 0))
2187 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
2188 VDEV_AUX_CORRUPT_DATA
);
2191 * If this is a leaf vdev, load its DTL.
2193 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_dtl_load(vd
) != 0)
2194 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
2195 VDEV_AUX_CORRUPT_DATA
);
2199 * The special vdev case is used for hot spares and l2cache devices. Its
2200 * sole purpose it to set the vdev state for the associated vdev. To do this,
2201 * we make sure that we can open the underlying device, then try to read the
2202 * label, and make sure that the label is sane and that it hasn't been
2203 * repurposed to another pool.
2206 vdev_validate_aux(vdev_t
*vd
)
2209 uint64_t guid
, version
;
2212 if (!vdev_readable(vd
))
2215 if ((label
= vdev_label_read_config(vd
, -1ULL)) == NULL
) {
2216 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
2217 VDEV_AUX_CORRUPT_DATA
);
2221 if (nvlist_lookup_uint64(label
, ZPOOL_CONFIG_VERSION
, &version
) != 0 ||
2222 !SPA_VERSION_IS_SUPPORTED(version
) ||
2223 nvlist_lookup_uint64(label
, ZPOOL_CONFIG_GUID
, &guid
) != 0 ||
2224 guid
!= vd
->vdev_guid
||
2225 nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_STATE
, &state
) != 0) {
2226 vdev_set_state(vd
, B_TRUE
, VDEV_STATE_CANT_OPEN
,
2227 VDEV_AUX_CORRUPT_DATA
);
2233 * We don't actually check the pool state here. If it's in fact in
2234 * use by another pool, we update this fact on the fly when requested.
2241 vdev_remove(vdev_t
*vd
, uint64_t txg
)
2243 spa_t
*spa
= vd
->vdev_spa
;
2244 objset_t
*mos
= spa
->spa_meta_objset
;
2247 tx
= dmu_tx_create_assigned(spa_get_dsl(spa
), txg
);
2248 ASSERT(vd
== vd
->vdev_top
);
2249 ASSERT3U(txg
, ==, spa_syncing_txg(spa
));
2251 if (vd
->vdev_ms
!= NULL
) {
2252 metaslab_group_t
*mg
= vd
->vdev_mg
;
2254 metaslab_group_histogram_verify(mg
);
2255 metaslab_class_histogram_verify(mg
->mg_class
);
2257 for (int m
= 0; m
< vd
->vdev_ms_count
; m
++) {
2258 metaslab_t
*msp
= vd
->vdev_ms
[m
];
2260 if (msp
== NULL
|| msp
->ms_sm
== NULL
)
2263 mutex_enter(&msp
->ms_lock
);
2265 * If the metaslab was not loaded when the vdev
2266 * was removed then the histogram accounting may
2267 * not be accurate. Update the histogram information
2268 * here so that we ensure that the metaslab group
2269 * and metaslab class are up-to-date.
2271 metaslab_group_histogram_remove(mg
, msp
);
2273 VERIFY0(space_map_allocated(msp
->ms_sm
));
2274 space_map_free(msp
->ms_sm
, tx
);
2275 space_map_close(msp
->ms_sm
);
2277 mutex_exit(&msp
->ms_lock
);
2280 metaslab_group_histogram_verify(mg
);
2281 metaslab_class_histogram_verify(mg
->mg_class
);
2282 for (int i
= 0; i
< RANGE_TREE_HISTOGRAM_SIZE
; i
++)
2283 ASSERT0(mg
->mg_histogram
[i
]);
2287 if (vd
->vdev_ms_array
) {
2288 (void) dmu_object_free(mos
, vd
->vdev_ms_array
, tx
);
2289 vd
->vdev_ms_array
= 0;
2292 if (vd
->vdev_islog
&& vd
->vdev_top_zap
!= 0) {
2293 vdev_destroy_unlink_zap(vd
, vd
->vdev_top_zap
, tx
);
2294 vd
->vdev_top_zap
= 0;
2300 vdev_sync_done(vdev_t
*vd
, uint64_t txg
)
2303 boolean_t reassess
= !txg_list_empty(&vd
->vdev_ms_list
, TXG_CLEAN(txg
));
2305 ASSERT(!vd
->vdev_ishole
);
2307 while (msp
= txg_list_remove(&vd
->vdev_ms_list
, TXG_CLEAN(txg
)))
2308 metaslab_sync_done(msp
, txg
);
2311 metaslab_sync_reassess(vd
->vdev_mg
);
2315 vdev_sync(vdev_t
*vd
, uint64_t txg
)
2317 spa_t
*spa
= vd
->vdev_spa
;
2322 ASSERT(!vd
->vdev_ishole
);
2324 if (vd
->vdev_ms_array
== 0 && vd
->vdev_ms_shift
!= 0) {
2325 ASSERT(vd
== vd
->vdev_top
);
2326 tx
= dmu_tx_create_assigned(spa
->spa_dsl_pool
, txg
);
2327 vd
->vdev_ms_array
= dmu_object_alloc(spa
->spa_meta_objset
,
2328 DMU_OT_OBJECT_ARRAY
, 0, DMU_OT_NONE
, 0, tx
);
2329 ASSERT(vd
->vdev_ms_array
!= 0);
2330 vdev_config_dirty(vd
);
2335 * Remove the metadata associated with this vdev once it's empty.
2337 if (vd
->vdev_stat
.vs_alloc
== 0 && vd
->vdev_removing
)
2338 vdev_remove(vd
, txg
);
2340 while ((msp
= txg_list_remove(&vd
->vdev_ms_list
, txg
)) != NULL
) {
2341 metaslab_sync(msp
, txg
);
2342 (void) txg_list_add(&vd
->vdev_ms_list
, msp
, TXG_CLEAN(txg
));
2345 while ((lvd
= txg_list_remove(&vd
->vdev_dtl_list
, txg
)) != NULL
)
2346 vdev_dtl_sync(lvd
, txg
);
2348 (void) txg_list_add(&spa
->spa_vdev_txg_list
, vd
, TXG_CLEAN(txg
));
2352 vdev_psize_to_asize(vdev_t
*vd
, uint64_t psize
)
2354 return (vd
->vdev_ops
->vdev_op_asize(vd
, psize
));
2358 * Mark the given vdev faulted. A faulted vdev behaves as if the device could
2359 * not be opened, and no I/O is attempted.
2362 vdev_fault(spa_t
*spa
, uint64_t guid
, vdev_aux_t aux
)
2366 spa_vdev_state_enter(spa
, SCL_NONE
);
2368 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
2369 return (spa_vdev_state_exit(spa
, NULL
, ENODEV
));
2371 if (!vd
->vdev_ops
->vdev_op_leaf
)
2372 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
2377 * We don't directly use the aux state here, but if we do a
2378 * vdev_reopen(), we need this value to be present to remember why we
2381 vd
->vdev_label_aux
= aux
;
2384 * Faulted state takes precedence over degraded.
2386 vd
->vdev_delayed_close
= B_FALSE
;
2387 vd
->vdev_faulted
= 1ULL;
2388 vd
->vdev_degraded
= 0ULL;
2389 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_FAULTED
, aux
);
2392 * If this device has the only valid copy of the data, then
2393 * back off and simply mark the vdev as degraded instead.
2395 if (!tvd
->vdev_islog
&& vd
->vdev_aux
== NULL
&& vdev_dtl_required(vd
)) {
2396 vd
->vdev_degraded
= 1ULL;
2397 vd
->vdev_faulted
= 0ULL;
2400 * If we reopen the device and it's not dead, only then do we
2405 if (vdev_readable(vd
))
2406 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_DEGRADED
, aux
);
2409 return (spa_vdev_state_exit(spa
, vd
, 0));
2413 * Mark the given vdev degraded. A degraded vdev is purely an indication to the
2414 * user that something is wrong. The vdev continues to operate as normal as far
2415 * as I/O is concerned.
2418 vdev_degrade(spa_t
*spa
, uint64_t guid
, vdev_aux_t aux
)
2422 spa_vdev_state_enter(spa
, SCL_NONE
);
2424 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
2425 return (spa_vdev_state_exit(spa
, NULL
, ENODEV
));
2427 if (!vd
->vdev_ops
->vdev_op_leaf
)
2428 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
2431 * If the vdev is already faulted, then don't do anything.
2433 if (vd
->vdev_faulted
|| vd
->vdev_degraded
)
2434 return (spa_vdev_state_exit(spa
, NULL
, 0));
2436 vd
->vdev_degraded
= 1ULL;
2437 if (!vdev_is_dead(vd
))
2438 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_DEGRADED
,
2441 return (spa_vdev_state_exit(spa
, vd
, 0));
2445 * Online the given vdev.
2447 * If 'ZFS_ONLINE_UNSPARE' is set, it implies two things. First, any attached
2448 * spare device should be detached when the device finishes resilvering.
2449 * Second, the online should be treated like a 'test' online case, so no FMA
2450 * events are generated if the device fails to open.
2453 vdev_online(spa_t
*spa
, uint64_t guid
, uint64_t flags
, vdev_state_t
*newstate
)
2455 vdev_t
*vd
, *tvd
, *pvd
, *rvd
= spa
->spa_root_vdev
;
2456 boolean_t wasoffline
;
2457 vdev_state_t oldstate
;
2459 spa_vdev_state_enter(spa
, SCL_NONE
);
2461 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
2462 return (spa_vdev_state_exit(spa
, NULL
, ENODEV
));
2464 if (!vd
->vdev_ops
->vdev_op_leaf
)
2465 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
2467 wasoffline
= (vd
->vdev_offline
|| vd
->vdev_tmpoffline
);
2468 oldstate
= vd
->vdev_state
;
2471 vd
->vdev_offline
= B_FALSE
;
2472 vd
->vdev_tmpoffline
= B_FALSE
;
2473 vd
->vdev_checkremove
= !!(flags
& ZFS_ONLINE_CHECKREMOVE
);
2474 vd
->vdev_forcefault
= !!(flags
& ZFS_ONLINE_FORCEFAULT
);
2476 /* XXX - L2ARC 1.0 does not support expansion */
2477 if (!vd
->vdev_aux
) {
2478 for (pvd
= vd
; pvd
!= rvd
; pvd
= pvd
->vdev_parent
)
2479 pvd
->vdev_expanding
= !!(flags
& ZFS_ONLINE_EXPAND
);
2483 vd
->vdev_checkremove
= vd
->vdev_forcefault
= B_FALSE
;
2485 if (!vd
->vdev_aux
) {
2486 for (pvd
= vd
; pvd
!= rvd
; pvd
= pvd
->vdev_parent
)
2487 pvd
->vdev_expanding
= B_FALSE
;
2491 *newstate
= vd
->vdev_state
;
2492 if ((flags
& ZFS_ONLINE_UNSPARE
) &&
2493 !vdev_is_dead(vd
) && vd
->vdev_parent
&&
2494 vd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
2495 vd
->vdev_parent
->vdev_child
[0] == vd
)
2496 vd
->vdev_unspare
= B_TRUE
;
2498 if ((flags
& ZFS_ONLINE_EXPAND
) || spa
->spa_autoexpand
) {
2500 /* XXX - L2ARC 1.0 does not support expansion */
2502 return (spa_vdev_state_exit(spa
, vd
, ENOTSUP
));
2503 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
2507 (oldstate
< VDEV_STATE_DEGRADED
&&
2508 vd
->vdev_state
>= VDEV_STATE_DEGRADED
))
2509 spa_event_notify(spa
, vd
, ESC_ZFS_VDEV_ONLINE
);
2511 return (spa_vdev_state_exit(spa
, vd
, 0));
2515 vdev_offline_locked(spa_t
*spa
, uint64_t guid
, uint64_t flags
)
2519 uint64_t generation
;
2520 metaslab_group_t
*mg
;
2523 spa_vdev_state_enter(spa
, SCL_ALLOC
);
2525 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
2526 return (spa_vdev_state_exit(spa
, NULL
, ENODEV
));
2528 if (!vd
->vdev_ops
->vdev_op_leaf
)
2529 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
2533 generation
= spa
->spa_config_generation
+ 1;
2536 * If the device isn't already offline, try to offline it.
2538 if (!vd
->vdev_offline
) {
2540 * If this device has the only valid copy of some data,
2541 * don't allow it to be offlined. Log devices are always
2544 if (!tvd
->vdev_islog
&& vd
->vdev_aux
== NULL
&&
2545 vdev_dtl_required(vd
))
2546 return (spa_vdev_state_exit(spa
, NULL
, EBUSY
));
2549 * If the top-level is a slog and it has had allocations
2550 * then proceed. We check that the vdev's metaslab group
2551 * is not NULL since it's possible that we may have just
2552 * added this vdev but not yet initialized its metaslabs.
2554 if (tvd
->vdev_islog
&& mg
!= NULL
) {
2556 * Prevent any future allocations.
2558 metaslab_group_passivate(mg
);
2559 (void) spa_vdev_state_exit(spa
, vd
, 0);
2561 error
= spa_offline_log(spa
);
2563 spa_vdev_state_enter(spa
, SCL_ALLOC
);
2566 * Check to see if the config has changed.
2568 if (error
|| generation
!= spa
->spa_config_generation
) {
2569 metaslab_group_activate(mg
);
2571 return (spa_vdev_state_exit(spa
,
2573 (void) spa_vdev_state_exit(spa
, vd
, 0);
2576 ASSERT0(tvd
->vdev_stat
.vs_alloc
);
2580 * Offline this device and reopen its top-level vdev.
2581 * If the top-level vdev is a log device then just offline
2582 * it. Otherwise, if this action results in the top-level
2583 * vdev becoming unusable, undo it and fail the request.
2585 vd
->vdev_offline
= B_TRUE
;
2588 if (!tvd
->vdev_islog
&& vd
->vdev_aux
== NULL
&&
2589 vdev_is_dead(tvd
)) {
2590 vd
->vdev_offline
= B_FALSE
;
2592 return (spa_vdev_state_exit(spa
, NULL
, EBUSY
));
2596 * Add the device back into the metaslab rotor so that
2597 * once we online the device it's open for business.
2599 if (tvd
->vdev_islog
&& mg
!= NULL
)
2600 metaslab_group_activate(mg
);
2603 vd
->vdev_tmpoffline
= !!(flags
& ZFS_OFFLINE_TEMPORARY
);
2605 return (spa_vdev_state_exit(spa
, vd
, 0));
2609 vdev_offline(spa_t
*spa
, uint64_t guid
, uint64_t flags
)
2613 mutex_enter(&spa
->spa_vdev_top_lock
);
2614 error
= vdev_offline_locked(spa
, guid
, flags
);
2615 mutex_exit(&spa
->spa_vdev_top_lock
);
2621 * Clear the error counts associated with this vdev. Unlike vdev_online() and
2622 * vdev_offline(), we assume the spa config is locked. We also clear all
2623 * children. If 'vd' is NULL, then the user wants to clear all vdevs.
2626 vdev_clear(spa_t
*spa
, vdev_t
*vd
)
2628 vdev_t
*rvd
= spa
->spa_root_vdev
;
2630 ASSERT(spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
2635 vd
->vdev_stat
.vs_read_errors
= 0;
2636 vd
->vdev_stat
.vs_write_errors
= 0;
2637 vd
->vdev_stat
.vs_checksum_errors
= 0;
2639 for (int c
= 0; c
< vd
->vdev_children
; c
++)
2640 vdev_clear(spa
, vd
->vdev_child
[c
]);
2643 * If we're in the FAULTED state or have experienced failed I/O, then
2644 * clear the persistent state and attempt to reopen the device. We
2645 * also mark the vdev config dirty, so that the new faulted state is
2646 * written out to disk.
2648 if (vd
->vdev_faulted
|| vd
->vdev_degraded
||
2649 !vdev_readable(vd
) || !vdev_writeable(vd
)) {
2652 * When reopening in reponse to a clear event, it may be due to
2653 * a fmadm repair request. In this case, if the device is
2654 * still broken, we want to still post the ereport again.
2656 vd
->vdev_forcefault
= B_TRUE
;
2658 vd
->vdev_faulted
= vd
->vdev_degraded
= 0ULL;
2659 vd
->vdev_cant_read
= B_FALSE
;
2660 vd
->vdev_cant_write
= B_FALSE
;
2662 vdev_reopen(vd
== rvd
? rvd
: vd
->vdev_top
);
2664 vd
->vdev_forcefault
= B_FALSE
;
2666 if (vd
!= rvd
&& vdev_writeable(vd
->vdev_top
))
2667 vdev_state_dirty(vd
->vdev_top
);
2669 if (vd
->vdev_aux
== NULL
&& !vdev_is_dead(vd
))
2670 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
2672 spa_event_notify(spa
, vd
, ESC_ZFS_VDEV_CLEAR
);
2676 * When clearing a FMA-diagnosed fault, we always want to
2677 * unspare the device, as we assume that the original spare was
2678 * done in response to the FMA fault.
2680 if (!vdev_is_dead(vd
) && vd
->vdev_parent
!= NULL
&&
2681 vd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
2682 vd
->vdev_parent
->vdev_child
[0] == vd
)
2683 vd
->vdev_unspare
= B_TRUE
;
2687 vdev_is_dead(vdev_t
*vd
)
2690 * Holes and missing devices are always considered "dead".
2691 * This simplifies the code since we don't have to check for
2692 * these types of devices in the various code paths.
2693 * Instead we rely on the fact that we skip over dead devices
2694 * before issuing I/O to them.
2696 return (vd
->vdev_state
< VDEV_STATE_DEGRADED
|| vd
->vdev_ishole
||
2697 vd
->vdev_ops
== &vdev_missing_ops
);
2701 vdev_readable(vdev_t
*vd
)
2703 return (!vdev_is_dead(vd
) && !vd
->vdev_cant_read
);
2707 vdev_writeable(vdev_t
*vd
)
2709 return (!vdev_is_dead(vd
) && !vd
->vdev_cant_write
);
2713 vdev_allocatable(vdev_t
*vd
)
2715 uint64_t state
= vd
->vdev_state
;
2718 * We currently allow allocations from vdevs which may be in the
2719 * process of reopening (i.e. VDEV_STATE_CLOSED). If the device
2720 * fails to reopen then we'll catch it later when we're holding
2721 * the proper locks. Note that we have to get the vdev state
2722 * in a local variable because although it changes atomically,
2723 * we're asking two separate questions about it.
2725 return (!(state
< VDEV_STATE_DEGRADED
&& state
!= VDEV_STATE_CLOSED
) &&
2726 !vd
->vdev_cant_write
&& !vd
->vdev_ishole
&&
2727 vd
->vdev_mg
->mg_initialized
);
2731 vdev_accessible(vdev_t
*vd
, zio_t
*zio
)
2733 ASSERT(zio
->io_vd
== vd
);
2735 if (vdev_is_dead(vd
) || vd
->vdev_remove_wanted
)
2738 if (zio
->io_type
== ZIO_TYPE_READ
)
2739 return (!vd
->vdev_cant_read
);
2741 if (zio
->io_type
== ZIO_TYPE_WRITE
)
2742 return (!vd
->vdev_cant_write
);
2748 * Get statistics for the given vdev.
2751 vdev_get_stats(vdev_t
*vd
, vdev_stat_t
*vs
)
2753 spa_t
*spa
= vd
->vdev_spa
;
2754 vdev_t
*rvd
= spa
->spa_root_vdev
;
2755 vdev_t
*tvd
= vd
->vdev_top
;
2757 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_READER
) != 0);
2759 mutex_enter(&vd
->vdev_stat_lock
);
2760 bcopy(&vd
->vdev_stat
, vs
, sizeof (*vs
));
2761 vs
->vs_timestamp
= gethrtime() - vs
->vs_timestamp
;
2762 vs
->vs_state
= vd
->vdev_state
;
2763 vs
->vs_rsize
= vdev_get_min_asize(vd
);
2764 if (vd
->vdev_ops
->vdev_op_leaf
)
2765 vs
->vs_rsize
+= VDEV_LABEL_START_SIZE
+ VDEV_LABEL_END_SIZE
;
2767 * Report expandable space on top-level, non-auxillary devices only.
2768 * The expandable space is reported in terms of metaslab sized units
2769 * since that determines how much space the pool can expand.
2771 if (vd
->vdev_aux
== NULL
&& tvd
!= NULL
) {
2772 vs
->vs_esize
= P2ALIGN(vd
->vdev_max_asize
- vd
->vdev_asize
-
2773 spa
->spa_bootsize
, 1ULL << tvd
->vdev_ms_shift
);
2775 if (vd
->vdev_aux
== NULL
&& vd
== vd
->vdev_top
&& !vd
->vdev_ishole
) {
2776 vs
->vs_fragmentation
= vd
->vdev_mg
->mg_fragmentation
;
2780 * If we're getting stats on the root vdev, aggregate the I/O counts
2781 * over all top-level vdevs (i.e. the direct children of the root).
2784 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
2785 vdev_t
*cvd
= rvd
->vdev_child
[c
];
2786 vdev_stat_t
*cvs
= &cvd
->vdev_stat
;
2788 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
2789 vs
->vs_ops
[t
] += cvs
->vs_ops
[t
];
2790 vs
->vs_bytes
[t
] += cvs
->vs_bytes
[t
];
2792 cvs
->vs_scan_removing
= cvd
->vdev_removing
;
2795 mutex_exit(&vd
->vdev_stat_lock
);
2799 vdev_clear_stats(vdev_t
*vd
)
2801 mutex_enter(&vd
->vdev_stat_lock
);
2802 vd
->vdev_stat
.vs_space
= 0;
2803 vd
->vdev_stat
.vs_dspace
= 0;
2804 vd
->vdev_stat
.vs_alloc
= 0;
2805 mutex_exit(&vd
->vdev_stat_lock
);
2809 vdev_scan_stat_init(vdev_t
*vd
)
2811 vdev_stat_t
*vs
= &vd
->vdev_stat
;
2813 for (int c
= 0; c
< vd
->vdev_children
; c
++)
2814 vdev_scan_stat_init(vd
->vdev_child
[c
]);
2816 mutex_enter(&vd
->vdev_stat_lock
);
2817 vs
->vs_scan_processed
= 0;
2818 mutex_exit(&vd
->vdev_stat_lock
);
2822 vdev_stat_update(zio_t
*zio
, uint64_t psize
)
2824 spa_t
*spa
= zio
->io_spa
;
2825 vdev_t
*rvd
= spa
->spa_root_vdev
;
2826 vdev_t
*vd
= zio
->io_vd
? zio
->io_vd
: rvd
;
2828 uint64_t txg
= zio
->io_txg
;
2829 vdev_stat_t
*vs
= &vd
->vdev_stat
;
2830 zio_type_t type
= zio
->io_type
;
2831 int flags
= zio
->io_flags
;
2834 * If this i/o is a gang leader, it didn't do any actual work.
2836 if (zio
->io_gang_tree
)
2839 if (zio
->io_error
== 0) {
2841 * If this is a root i/o, don't count it -- we've already
2842 * counted the top-level vdevs, and vdev_get_stats() will
2843 * aggregate them when asked. This reduces contention on
2844 * the root vdev_stat_lock and implicitly handles blocks
2845 * that compress away to holes, for which there is no i/o.
2846 * (Holes never create vdev children, so all the counters
2847 * remain zero, which is what we want.)
2849 * Note: this only applies to successful i/o (io_error == 0)
2850 * because unlike i/o counts, errors are not additive.
2851 * When reading a ditto block, for example, failure of
2852 * one top-level vdev does not imply a root-level error.
2857 ASSERT(vd
== zio
->io_vd
);
2859 if (flags
& ZIO_FLAG_IO_BYPASS
)
2862 mutex_enter(&vd
->vdev_stat_lock
);
2864 if (flags
& ZIO_FLAG_IO_REPAIR
) {
2865 if (flags
& ZIO_FLAG_SCAN_THREAD
) {
2866 dsl_scan_phys_t
*scn_phys
=
2867 &spa
->spa_dsl_pool
->dp_scan
->scn_phys
;
2868 uint64_t *processed
= &scn_phys
->scn_processed
;
2871 if (vd
->vdev_ops
->vdev_op_leaf
)
2872 atomic_add_64(processed
, psize
);
2873 vs
->vs_scan_processed
+= psize
;
2876 if (flags
& ZIO_FLAG_SELF_HEAL
)
2877 vs
->vs_self_healed
+= psize
;
2881 vs
->vs_bytes
[type
] += psize
;
2883 mutex_exit(&vd
->vdev_stat_lock
);
2887 if (flags
& ZIO_FLAG_SPECULATIVE
)
2891 * If this is an I/O error that is going to be retried, then ignore the
2892 * error. Otherwise, the user may interpret B_FAILFAST I/O errors as
2893 * hard errors, when in reality they can happen for any number of
2894 * innocuous reasons (bus resets, MPxIO link failure, etc).
2896 if (zio
->io_error
== EIO
&&
2897 !(zio
->io_flags
& ZIO_FLAG_IO_RETRY
))
2901 * Intent logs writes won't propagate their error to the root
2902 * I/O so don't mark these types of failures as pool-level
2905 if (zio
->io_vd
== NULL
&& (zio
->io_flags
& ZIO_FLAG_DONT_PROPAGATE
))
2908 mutex_enter(&vd
->vdev_stat_lock
);
2909 if (type
== ZIO_TYPE_READ
&& !vdev_is_dead(vd
)) {
2910 if (zio
->io_error
== ECKSUM
)
2911 vs
->vs_checksum_errors
++;
2913 vs
->vs_read_errors
++;
2915 if (type
== ZIO_TYPE_WRITE
&& !vdev_is_dead(vd
))
2916 vs
->vs_write_errors
++;
2917 mutex_exit(&vd
->vdev_stat_lock
);
2919 if (type
== ZIO_TYPE_WRITE
&& txg
!= 0 &&
2920 (!(flags
& ZIO_FLAG_IO_REPAIR
) ||
2921 (flags
& ZIO_FLAG_SCAN_THREAD
) ||
2922 spa
->spa_claiming
)) {
2924 * This is either a normal write (not a repair), or it's
2925 * a repair induced by the scrub thread, or it's a repair
2926 * made by zil_claim() during spa_load() in the first txg.
2927 * In the normal case, we commit the DTL change in the same
2928 * txg as the block was born. In the scrub-induced repair
2929 * case, we know that scrubs run in first-pass syncing context,
2930 * so we commit the DTL change in spa_syncing_txg(spa).
2931 * In the zil_claim() case, we commit in spa_first_txg(spa).
2933 * We currently do not make DTL entries for failed spontaneous
2934 * self-healing writes triggered by normal (non-scrubbing)
2935 * reads, because we have no transactional context in which to
2936 * do so -- and it's not clear that it'd be desirable anyway.
2938 if (vd
->vdev_ops
->vdev_op_leaf
) {
2939 uint64_t commit_txg
= txg
;
2940 if (flags
& ZIO_FLAG_SCAN_THREAD
) {
2941 ASSERT(flags
& ZIO_FLAG_IO_REPAIR
);
2942 ASSERT(spa_sync_pass(spa
) == 1);
2943 vdev_dtl_dirty(vd
, DTL_SCRUB
, txg
, 1);
2944 commit_txg
= spa_syncing_txg(spa
);
2945 } else if (spa
->spa_claiming
) {
2946 ASSERT(flags
& ZIO_FLAG_IO_REPAIR
);
2947 commit_txg
= spa_first_txg(spa
);
2949 ASSERT(commit_txg
>= spa_syncing_txg(spa
));
2950 if (vdev_dtl_contains(vd
, DTL_MISSING
, txg
, 1))
2952 for (pvd
= vd
; pvd
!= rvd
; pvd
= pvd
->vdev_parent
)
2953 vdev_dtl_dirty(pvd
, DTL_PARTIAL
, txg
, 1);
2954 vdev_dirty(vd
->vdev_top
, VDD_DTL
, vd
, commit_txg
);
2957 vdev_dtl_dirty(vd
, DTL_MISSING
, txg
, 1);
2962 * Update the in-core space usage stats for this vdev, its metaslab class,
2963 * and the root vdev.
2966 vdev_space_update(vdev_t
*vd
, int64_t alloc_delta
, int64_t defer_delta
,
2967 int64_t space_delta
)
2969 int64_t dspace_delta
= space_delta
;
2970 spa_t
*spa
= vd
->vdev_spa
;
2971 vdev_t
*rvd
= spa
->spa_root_vdev
;
2972 metaslab_group_t
*mg
= vd
->vdev_mg
;
2973 metaslab_class_t
*mc
= mg
? mg
->mg_class
: NULL
;
2975 ASSERT(vd
== vd
->vdev_top
);
2978 * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion
2979 * factor. We must calculate this here and not at the root vdev
2980 * because the root vdev's psize-to-asize is simply the max of its
2981 * childrens', thus not accurate enough for us.
2983 ASSERT((dspace_delta
& (SPA_MINBLOCKSIZE
-1)) == 0);
2984 ASSERT(vd
->vdev_deflate_ratio
!= 0 || vd
->vdev_isl2cache
);
2985 dspace_delta
= (dspace_delta
>> SPA_MINBLOCKSHIFT
) *
2986 vd
->vdev_deflate_ratio
;
2988 mutex_enter(&vd
->vdev_stat_lock
);
2989 vd
->vdev_stat
.vs_alloc
+= alloc_delta
;
2990 vd
->vdev_stat
.vs_space
+= space_delta
;
2991 vd
->vdev_stat
.vs_dspace
+= dspace_delta
;
2992 mutex_exit(&vd
->vdev_stat_lock
);
2994 if (mc
== spa_normal_class(spa
)) {
2995 mutex_enter(&rvd
->vdev_stat_lock
);
2996 rvd
->vdev_stat
.vs_alloc
+= alloc_delta
;
2997 rvd
->vdev_stat
.vs_space
+= space_delta
;
2998 rvd
->vdev_stat
.vs_dspace
+= dspace_delta
;
2999 mutex_exit(&rvd
->vdev_stat_lock
);
3003 ASSERT(rvd
== vd
->vdev_parent
);
3004 ASSERT(vd
->vdev_ms_count
!= 0);
3006 metaslab_class_space_update(mc
,
3007 alloc_delta
, defer_delta
, space_delta
, dspace_delta
);
3012 * Mark a top-level vdev's config as dirty, placing it on the dirty list
3013 * so that it will be written out next time the vdev configuration is synced.
3014 * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs.
3017 vdev_config_dirty(vdev_t
*vd
)
3019 spa_t
*spa
= vd
->vdev_spa
;
3020 vdev_t
*rvd
= spa
->spa_root_vdev
;
3023 ASSERT(spa_writeable(spa
));
3026 * If this is an aux vdev (as with l2cache and spare devices), then we
3027 * update the vdev config manually and set the sync flag.
3029 if (vd
->vdev_aux
!= NULL
) {
3030 spa_aux_vdev_t
*sav
= vd
->vdev_aux
;
3034 for (c
= 0; c
< sav
->sav_count
; c
++) {
3035 if (sav
->sav_vdevs
[c
] == vd
)
3039 if (c
== sav
->sav_count
) {
3041 * We're being removed. There's nothing more to do.
3043 ASSERT(sav
->sav_sync
== B_TRUE
);
3047 sav
->sav_sync
= B_TRUE
;
3049 if (nvlist_lookup_nvlist_array(sav
->sav_config
,
3050 ZPOOL_CONFIG_L2CACHE
, &aux
, &naux
) != 0) {
3051 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
3052 ZPOOL_CONFIG_SPARES
, &aux
, &naux
) == 0);
3058 * Setting the nvlist in the middle if the array is a little
3059 * sketchy, but it will work.
3061 nvlist_free(aux
[c
]);
3062 aux
[c
] = vdev_config_generate(spa
, vd
, B_TRUE
, 0);
3068 * The dirty list is protected by the SCL_CONFIG lock. The caller
3069 * must either hold SCL_CONFIG as writer, or must be the sync thread
3070 * (which holds SCL_CONFIG as reader). There's only one sync thread,
3071 * so this is sufficient to ensure mutual exclusion.
3073 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_WRITER
) ||
3074 (dsl_pool_sync_context(spa_get_dsl(spa
)) &&
3075 spa_config_held(spa
, SCL_CONFIG
, RW_READER
)));
3078 for (c
= 0; c
< rvd
->vdev_children
; c
++)
3079 vdev_config_dirty(rvd
->vdev_child
[c
]);
3081 ASSERT(vd
== vd
->vdev_top
);
3083 if (!list_link_active(&vd
->vdev_config_dirty_node
) &&
3085 list_insert_head(&spa
->spa_config_dirty_list
, vd
);
3090 vdev_config_clean(vdev_t
*vd
)
3092 spa_t
*spa
= vd
->vdev_spa
;
3094 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_WRITER
) ||
3095 (dsl_pool_sync_context(spa_get_dsl(spa
)) &&
3096 spa_config_held(spa
, SCL_CONFIG
, RW_READER
)));
3098 ASSERT(list_link_active(&vd
->vdev_config_dirty_node
));
3099 list_remove(&spa
->spa_config_dirty_list
, vd
);
3103 * Mark a top-level vdev's state as dirty, so that the next pass of
3104 * spa_sync() can convert this into vdev_config_dirty(). We distinguish
3105 * the state changes from larger config changes because they require
3106 * much less locking, and are often needed for administrative actions.
3109 vdev_state_dirty(vdev_t
*vd
)
3111 spa_t
*spa
= vd
->vdev_spa
;
3113 ASSERT(spa_writeable(spa
));
3114 ASSERT(vd
== vd
->vdev_top
);
3117 * The state list is protected by the SCL_STATE lock. The caller
3118 * must either hold SCL_STATE as writer, or must be the sync thread
3119 * (which holds SCL_STATE as reader). There's only one sync thread,
3120 * so this is sufficient to ensure mutual exclusion.
3122 ASSERT(spa_config_held(spa
, SCL_STATE
, RW_WRITER
) ||
3123 (dsl_pool_sync_context(spa_get_dsl(spa
)) &&
3124 spa_config_held(spa
, SCL_STATE
, RW_READER
)));
3126 if (!list_link_active(&vd
->vdev_state_dirty_node
) && !vd
->vdev_ishole
)
3127 list_insert_head(&spa
->spa_state_dirty_list
, vd
);
3131 vdev_state_clean(vdev_t
*vd
)
3133 spa_t
*spa
= vd
->vdev_spa
;
3135 ASSERT(spa_config_held(spa
, SCL_STATE
, RW_WRITER
) ||
3136 (dsl_pool_sync_context(spa_get_dsl(spa
)) &&
3137 spa_config_held(spa
, SCL_STATE
, RW_READER
)));
3139 ASSERT(list_link_active(&vd
->vdev_state_dirty_node
));
3140 list_remove(&spa
->spa_state_dirty_list
, vd
);
3144 * Propagate vdev state up from children to parent.
3147 vdev_propagate_state(vdev_t
*vd
)
3149 spa_t
*spa
= vd
->vdev_spa
;
3150 vdev_t
*rvd
= spa
->spa_root_vdev
;
3151 int degraded
= 0, faulted
= 0;
3155 if (vd
->vdev_children
> 0) {
3156 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
3157 child
= vd
->vdev_child
[c
];
3160 * Don't factor holes into the decision.
3162 if (child
->vdev_ishole
)
3165 if (!vdev_readable(child
) ||
3166 (!vdev_writeable(child
) && spa_writeable(spa
))) {
3168 * Root special: if there is a top-level log
3169 * device, treat the root vdev as if it were
3172 if (child
->vdev_islog
&& vd
== rvd
)
3176 } else if (child
->vdev_state
<= VDEV_STATE_DEGRADED
) {
3180 if (child
->vdev_stat
.vs_aux
== VDEV_AUX_CORRUPT_DATA
)
3184 vd
->vdev_ops
->vdev_op_state_change(vd
, faulted
, degraded
);
3187 * Root special: if there is a top-level vdev that cannot be
3188 * opened due to corrupted metadata, then propagate the root
3189 * vdev's aux state as 'corrupt' rather than 'insufficient
3192 if (corrupted
&& vd
== rvd
&&
3193 rvd
->vdev_state
== VDEV_STATE_CANT_OPEN
)
3194 vdev_set_state(rvd
, B_FALSE
, VDEV_STATE_CANT_OPEN
,
3195 VDEV_AUX_CORRUPT_DATA
);
3198 if (vd
->vdev_parent
)
3199 vdev_propagate_state(vd
->vdev_parent
);
3203 * Set a vdev's state. If this is during an open, we don't update the parent
3204 * state, because we're in the process of opening children depth-first.
3205 * Otherwise, we propagate the change to the parent.
3207 * If this routine places a device in a faulted state, an appropriate ereport is
3211 vdev_set_state(vdev_t
*vd
, boolean_t isopen
, vdev_state_t state
, vdev_aux_t aux
)
3213 uint64_t save_state
;
3214 spa_t
*spa
= vd
->vdev_spa
;
3216 if (state
== vd
->vdev_state
) {
3217 vd
->vdev_stat
.vs_aux
= aux
;
3221 save_state
= vd
->vdev_state
;
3223 vd
->vdev_state
= state
;
3224 vd
->vdev_stat
.vs_aux
= aux
;
3227 * If we are setting the vdev state to anything but an open state, then
3228 * always close the underlying device unless the device has requested
3229 * a delayed close (i.e. we're about to remove or fault the device).
3230 * Otherwise, we keep accessible but invalid devices open forever.
3231 * We don't call vdev_close() itself, because that implies some extra
3232 * checks (offline, etc) that we don't want here. This is limited to
3233 * leaf devices, because otherwise closing the device will affect other
3236 if (!vd
->vdev_delayed_close
&& vdev_is_dead(vd
) &&
3237 vd
->vdev_ops
->vdev_op_leaf
)
3238 vd
->vdev_ops
->vdev_op_close(vd
);
3241 * If we have brought this vdev back into service, we need
3242 * to notify fmd so that it can gracefully repair any outstanding
3243 * cases due to a missing device. We do this in all cases, even those
3244 * that probably don't correlate to a repaired fault. This is sure to
3245 * catch all cases, and we let the zfs-retire agent sort it out. If
3246 * this is a transient state it's OK, as the retire agent will
3247 * double-check the state of the vdev before repairing it.
3249 if (state
== VDEV_STATE_HEALTHY
&& vd
->vdev_ops
->vdev_op_leaf
&&
3250 vd
->vdev_prevstate
!= state
)
3251 zfs_post_state_change(spa
, vd
);
3253 if (vd
->vdev_removed
&&
3254 state
== VDEV_STATE_CANT_OPEN
&&
3255 (aux
== VDEV_AUX_OPEN_FAILED
|| vd
->vdev_checkremove
)) {
3257 * If the previous state is set to VDEV_STATE_REMOVED, then this
3258 * device was previously marked removed and someone attempted to
3259 * reopen it. If this failed due to a nonexistent device, then
3260 * keep the device in the REMOVED state. We also let this be if
3261 * it is one of our special test online cases, which is only
3262 * attempting to online the device and shouldn't generate an FMA
3265 vd
->vdev_state
= VDEV_STATE_REMOVED
;
3266 vd
->vdev_stat
.vs_aux
= VDEV_AUX_NONE
;
3267 } else if (state
== VDEV_STATE_REMOVED
) {
3268 vd
->vdev_removed
= B_TRUE
;
3269 } else if (state
== VDEV_STATE_CANT_OPEN
) {
3271 * If we fail to open a vdev during an import or recovery, we
3272 * mark it as "not available", which signifies that it was
3273 * never there to begin with. Failure to open such a device
3274 * is not considered an error.
3276 if ((spa_load_state(spa
) == SPA_LOAD_IMPORT
||
3277 spa_load_state(spa
) == SPA_LOAD_RECOVER
) &&
3278 vd
->vdev_ops
->vdev_op_leaf
)
3279 vd
->vdev_not_present
= 1;
3282 * Post the appropriate ereport. If the 'prevstate' field is
3283 * set to something other than VDEV_STATE_UNKNOWN, it indicates
3284 * that this is part of a vdev_reopen(). In this case, we don't
3285 * want to post the ereport if the device was already in the
3286 * CANT_OPEN state beforehand.
3288 * If the 'checkremove' flag is set, then this is an attempt to
3289 * online the device in response to an insertion event. If we
3290 * hit this case, then we have detected an insertion event for a
3291 * faulted or offline device that wasn't in the removed state.
3292 * In this scenario, we don't post an ereport because we are
3293 * about to replace the device, or attempt an online with
3294 * vdev_forcefault, which will generate the fault for us.
3296 if ((vd
->vdev_prevstate
!= state
|| vd
->vdev_forcefault
) &&
3297 !vd
->vdev_not_present
&& !vd
->vdev_checkremove
&&
3298 vd
!= spa
->spa_root_vdev
) {
3302 case VDEV_AUX_OPEN_FAILED
:
3303 class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED
;
3305 case VDEV_AUX_CORRUPT_DATA
:
3306 class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA
;
3308 case VDEV_AUX_NO_REPLICAS
:
3309 class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS
;
3311 case VDEV_AUX_BAD_GUID_SUM
:
3312 class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM
;
3314 case VDEV_AUX_TOO_SMALL
:
3315 class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL
;
3317 case VDEV_AUX_BAD_LABEL
:
3318 class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL
;
3321 class = FM_EREPORT_ZFS_DEVICE_UNKNOWN
;
3324 zfs_ereport_post(class, spa
, vd
, NULL
, save_state
, 0);
3327 /* Erase any notion of persistent removed state */
3328 vd
->vdev_removed
= B_FALSE
;
3330 vd
->vdev_removed
= B_FALSE
;
3333 if (!isopen
&& vd
->vdev_parent
)
3334 vdev_propagate_state(vd
->vdev_parent
);
3338 * Check the vdev configuration to ensure that it's capable of supporting
3339 * a root pool. We do not support partial configuration.
3340 * In addition, only a single top-level vdev is allowed.
3343 vdev_is_bootable(vdev_t
*vd
)
3345 if (!vd
->vdev_ops
->vdev_op_leaf
) {
3346 char *vdev_type
= vd
->vdev_ops
->vdev_op_type
;
3348 if (strcmp(vdev_type
, VDEV_TYPE_ROOT
) == 0 &&
3349 vd
->vdev_children
> 1) {
3351 } else if (strcmp(vdev_type
, VDEV_TYPE_MISSING
) == 0) {
3356 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
3357 if (!vdev_is_bootable(vd
->vdev_child
[c
]))
3364 * Load the state from the original vdev tree (ovd) which
3365 * we've retrieved from the MOS config object. If the original
3366 * vdev was offline or faulted then we transfer that state to the
3367 * device in the current vdev tree (nvd).
3370 vdev_load_log_state(vdev_t
*nvd
, vdev_t
*ovd
)
3372 spa_t
*spa
= nvd
->vdev_spa
;
3374 ASSERT(nvd
->vdev_top
->vdev_islog
);
3375 ASSERT(spa_config_held(spa
, SCL_STATE_ALL
, RW_WRITER
) == SCL_STATE_ALL
);
3376 ASSERT3U(nvd
->vdev_guid
, ==, ovd
->vdev_guid
);
3378 for (int c
= 0; c
< nvd
->vdev_children
; c
++)
3379 vdev_load_log_state(nvd
->vdev_child
[c
], ovd
->vdev_child
[c
]);
3381 if (nvd
->vdev_ops
->vdev_op_leaf
) {
3383 * Restore the persistent vdev state
3385 nvd
->vdev_offline
= ovd
->vdev_offline
;
3386 nvd
->vdev_faulted
= ovd
->vdev_faulted
;
3387 nvd
->vdev_degraded
= ovd
->vdev_degraded
;
3388 nvd
->vdev_removed
= ovd
->vdev_removed
;
3393 * Determine if a log device has valid content. If the vdev was
3394 * removed or faulted in the MOS config then we know that
3395 * the content on the log device has already been written to the pool.
3398 vdev_log_state_valid(vdev_t
*vd
)
3400 if (vd
->vdev_ops
->vdev_op_leaf
&& !vd
->vdev_faulted
&&
3404 for (int c
= 0; c
< vd
->vdev_children
; c
++)
3405 if (vdev_log_state_valid(vd
->vdev_child
[c
]))
3412 * Expand a vdev if possible.
3415 vdev_expand(vdev_t
*vd
, uint64_t txg
)
3417 ASSERT(vd
->vdev_top
== vd
);
3418 ASSERT(spa_config_held(vd
->vdev_spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
3420 if ((vd
->vdev_asize
>> vd
->vdev_ms_shift
) > vd
->vdev_ms_count
) {
3421 VERIFY(vdev_metaslab_init(vd
, txg
) == 0);
3422 vdev_config_dirty(vd
);
3430 vdev_split(vdev_t
*vd
)
3432 vdev_t
*cvd
, *pvd
= vd
->vdev_parent
;
3434 vdev_remove_child(pvd
, vd
);
3435 vdev_compact_children(pvd
);
3437 cvd
= pvd
->vdev_child
[0];
3438 if (pvd
->vdev_children
== 1) {
3439 vdev_remove_parent(cvd
);
3440 cvd
->vdev_splitting
= B_TRUE
;
3442 vdev_propagate_state(cvd
);
3446 vdev_deadman(vdev_t
*vd
)
3448 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
3449 vdev_t
*cvd
= vd
->vdev_child
[c
];
3454 if (vd
->vdev_ops
->vdev_op_leaf
) {
3455 vdev_queue_t
*vq
= &vd
->vdev_queue
;
3457 mutex_enter(&vq
->vq_lock
);
3458 if (avl_numnodes(&vq
->vq_active_tree
) > 0) {
3459 spa_t
*spa
= vd
->vdev_spa
;
3464 * Look at the head of all the pending queues,
3465 * if any I/O has been outstanding for longer than
3466 * the spa_deadman_synctime we panic the system.
3468 fio
= avl_first(&vq
->vq_active_tree
);
3469 delta
= gethrtime() - fio
->io_timestamp
;
3470 if (delta
> spa_deadman_synctime(spa
)) {
3471 zfs_dbgmsg("SLOW IO: zio timestamp %lluns, "
3472 "delta %lluns, last io %lluns",
3473 fio
->io_timestamp
, delta
,
3474 vq
->vq_io_complete_ts
);
3475 fm_panic("I/O to pool '%s' appears to be "
3476 "hung.", spa_name(spa
));
3479 mutex_exit(&vq
->vq_lock
);