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OpenZFS 7614, 9064 - zfs device evacuation/removal
[mirror_zfs.git] / include / sys / vdev.h
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34dc7c2f
BB		 1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
9ae529ec 21
34dc7c2f 22/*
428870ff 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
a1d477c2 24 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
34dc7c2f
BB		 25 */
26
27#ifndef _SYS_VDEV_H
28#define _SYS_VDEV_H
29
34dc7c2f
BB		 30#include <sys/spa.h>
31#include <sys/zio.h>
32#include <sys/dmu.h>
33#include <sys/space_map.h>
34#include <sys/fs/zfs.h>
35
36#ifdef __cplusplus
37extern "C" {
38#endif
39
fb5f0bc8
BB		 40typedef enum vdev_dtl_type {
41 DTL_MISSING, /* 0% replication: no copies of the data */
42 DTL_PARTIAL, /* less than 100% replication: some copies missing */
43 DTL_SCRUB, /* unable to fully repair during scrub/resilver */
44 DTL_OUTAGE, /* temporarily missing (used to attempt detach) */
45 DTL_TYPES
46} vdev_dtl_type_t;
47
c409e464 48extern int zfs_nocacheflush;
34dc7c2f 49
34dc7c2f 50extern int vdev_open(vdev_t *);
428870ff 51extern void vdev_open_children(vdev_t *);
c7f2d69d 52extern int vdev_validate(vdev_t *, boolean_t);
34dc7c2f
BB		 53extern void vdev_close(vdev_t *);
54extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
34dc7c2f
BB		 55extern void vdev_reopen(vdev_t *);
56extern int vdev_validate_aux(vdev_t *vd);
b128c09f 57extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
a1d477c2 58extern boolean_t vdev_is_concrete(vdev_t *vd);
b128c09f 59extern boolean_t vdev_is_bootable(vdev_t *vd);
34dc7c2f
BB		 60extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
61extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
9c43027b 62extern int vdev_count_leaves(spa_t *spa);
fb5f0bc8
BB		 63extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
64 uint64_t txg, uint64_t size);
65extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
66 uint64_t txg, uint64_t size);
67extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
3d6da72d 68extern boolean_t vdev_dtl_need_resilver(vdev_t *vd, uint64_t off, size_t size);
34dc7c2f
BB		 69extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
70 int scrub_done);
fb5f0bc8 71extern boolean_t vdev_dtl_required(vdev_t *vd);
b128c09f
BB		 72extern boolean_t vdev_resilver_needed(vdev_t *vd,
73 uint64_t *minp, uint64_t *maxp);
e0ab3ab5
JS		 74extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj,
75 dmu_tx_t *tx);
76extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx);
77extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx);
a1d477c2
MA		 78extern void vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx);
79extern void vdev_indirect_mark_obsolete(vdev_t *vd, uint64_t offset,
80 uint64_t size, uint64_t txg);
81extern void spa_vdev_indirect_mark_obsolete(spa_t *spa, uint64_t vdev,
82 uint64_t offset, uint64_t size, dmu_tx_t *tx);
34dc7c2f 83
428870ff
BB		 84extern void vdev_hold(vdev_t *);
85extern void vdev_rele(vdev_t *);
86
34dc7c2f
BB		 87extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
88extern void vdev_metaslab_fini(vdev_t *vd);
9babb374
BB		 89extern void vdev_metaslab_set_size(vdev_t *);
90extern void vdev_expand(vdev_t *vd, uint64_t txg);
428870ff 91extern void vdev_split(vdev_t *vd);
8fb1ede1 92extern void vdev_deadman(vdev_t *vd, char *tag);
428870ff 93
193a37cb 94extern void vdev_get_stats_ex(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx);
34dc7c2f
BB		 95extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
96extern void vdev_clear_stats(vdev_t *vd);
b128c09f 97extern void vdev_stat_update(zio_t *zio, uint64_t psize);
428870ff 98extern void vdev_scan_stat_init(vdev_t *vd);
34dc7c2f
BB		 99extern void vdev_propagate_state(vdev_t *vd);
100extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
101 vdev_aux_t aux);
102
428870ff
BB		 103extern void vdev_space_update(vdev_t *vd,
104 int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
34dc7c2f
BB		 105
106extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
107
428870ff
BB		 108extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
109extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
34dc7c2f
BB		 110extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
111 vdev_state_t *);
112extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
b128c09f 113extern void vdev_clear(spa_t *spa, vdev_t *vd);
34dc7c2f 114
b128c09f
BB		 115extern boolean_t vdev_is_dead(vdev_t *vd);
116extern boolean_t vdev_readable(vdev_t *vd);
117extern boolean_t vdev_writeable(vdev_t *vd);
118extern boolean_t vdev_allocatable(vdev_t *vd);
119extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
34dc7c2f
BB		 120
121extern void vdev_cache_init(vdev_t *vd);
122extern void vdev_cache_fini(vdev_t *vd);
b0bc7a84 123extern boolean_t vdev_cache_read(zio_t *zio);
34dc7c2f
BB		 124extern void vdev_cache_write(zio_t *zio);
125extern void vdev_cache_purge(vdev_t *vd);
126
127extern void vdev_queue_init(vdev_t *vd);
128extern void vdev_queue_fini(vdev_t *vd);
129extern zio_t *vdev_queue_io(zio_t *zio);
130extern void vdev_queue_io_done(zio_t *zio);
a8b2e306 131extern void vdev_queue_change_io_priority(zio_t *zio, zio_priority_t priority);
34dc7c2f 132
9f500936 133extern int vdev_queue_length(vdev_t *vd);
d6c6590c 134extern uint64_t vdev_queue_last_offset(vdev_t *vd);
9f500936 135
34dc7c2f
BB		 136extern void vdev_config_dirty(vdev_t *vd);
137extern void vdev_config_clean(vdev_t *vd);
b6fcb792 138extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
34dc7c2f 139
b128c09f
BB		 140extern void vdev_state_dirty(vdev_t *vd);
141extern void vdev_state_clean(vdev_t *vd);
142
428870ff
BB		 143typedef enum vdev_config_flag {
144 VDEV_CONFIG_SPARE = 1 << 0,
145 VDEV_CONFIG_L2CACHE = 1 << 1,
e0ab3ab5
JS		 146 VDEV_CONFIG_REMOVING = 1 << 2,
147 VDEV_CONFIG_MOS = 1 << 3
428870ff
BB		 148} vdev_config_flag_t;
149
150extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
34dc7c2f 151extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
428870ff 152 boolean_t getstats, vdev_config_flag_t flags);
34dc7c2f
BB		 153
154/*
155 * Label routines
156 */
157struct uberblock;
158extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
b128c09f 159extern int vdev_label_number(uint64_t psise, uint64_t offset);
3bc7e0fb 160extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
9ae529ec 161extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
193a37cb 162extern void vdev_config_generate_stats(vdev_t *vd, nvlist_t *nv);
379ca9cf
OF		 163extern void vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t
164 offset, uint64_t size, zio_done_func_t *done, void *private, int flags);
34dc7c2f
BB		 165
166typedef enum {
167 VDEV_LABEL_CREATE, /* create/add a new device */
168 VDEV_LABEL_REPLACE, /* replace an existing device */
169 VDEV_LABEL_SPARE, /* add a new hot spare */
170 VDEV_LABEL_REMOVE, /* remove an existing device */
428870ff
BB		 171 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */
172 VDEV_LABEL_SPLIT /* generating new label for split-off dev */
34dc7c2f
BB		 173} vdev_labeltype_t;
174
175extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
176
177#ifdef __cplusplus
178}
179#endif
180
181#endif /* _SYS_VDEV_H */
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