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 */
21
22/*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2013 by Delphix. All rights reserved.
25 */
26
27#ifndef _SYS_VDEV_H
28#define _SYS_VDEV_H
29
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
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
48extern boolean_t zfs_nocacheflush;
49extern boolean_t zfs_trim_enabled;
50
51extern int vdev_open(vdev_t *);
52extern void vdev_open_children(vdev_t *);
53extern boolean_t vdev_uses_zvols(vdev_t *);
54extern int vdev_validate(vdev_t *, boolean_t);
55extern void vdev_close(vdev_t *);
56extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
57extern void vdev_reopen(vdev_t *);
58extern int vdev_validate_aux(vdev_t *vd);
59extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
60
61extern boolean_t vdev_is_bootable(vdev_t *vd);
62extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
63extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
64extern int vdev_count_leaves(spa_t *spa);
65extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
66 uint64_t txg, uint64_t size);
67extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
68 uint64_t txg, uint64_t size);
69extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
70extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
71 int scrub_done);
72extern boolean_t vdev_dtl_required(vdev_t *vd);
73extern boolean_t vdev_resilver_needed(vdev_t *vd,
74 uint64_t *minp, uint64_t *maxp);
75extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj,
76 dmu_tx_t *tx);
77extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx);
78extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx);
79
80extern void vdev_hold(vdev_t *);
81extern void vdev_rele(vdev_t *);
82
83extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
84extern void vdev_metaslab_fini(vdev_t *vd);
85extern void vdev_metaslab_set_size(vdev_t *);
86extern void vdev_ashift_optimize(vdev_t *);
87extern void vdev_expand(vdev_t *vd, uint64_t txg);
88extern void vdev_split(vdev_t *vd);
89extern void vdev_deadman(vdev_t *vd);
90
91
92extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
93extern void vdev_clear_stats(vdev_t *vd);
94extern void vdev_stat_update(zio_t *zio, uint64_t psize);
95extern void vdev_scan_stat_init(vdev_t *vd);
96extern void vdev_propagate_state(vdev_t *vd);
97extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
98 vdev_aux_t aux);
99
100extern void vdev_space_update(vdev_t *vd,
101 int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
102
103extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
104
105extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
106extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
107extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
108 vdev_state_t *);
109extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
110extern void vdev_clear(spa_t *spa, vdev_t *vd);
111
112extern boolean_t vdev_is_dead(vdev_t *vd);
113extern boolean_t vdev_readable(vdev_t *vd);
114extern boolean_t vdev_writeable(vdev_t *vd);
115extern boolean_t vdev_allocatable(vdev_t *vd);
116extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
117
118extern void vdev_cache_init(vdev_t *vd);
119extern void vdev_cache_fini(vdev_t *vd);
120extern boolean_t vdev_cache_read(zio_t *zio);
121extern void vdev_cache_write(zio_t *zio);
122extern void vdev_cache_purge(vdev_t *vd);
123
124extern void vdev_queue_init(vdev_t *vd);
125extern void vdev_queue_fini(vdev_t *vd);
126extern zio_t *vdev_queue_io(zio_t *zio);
127extern void vdev_queue_io_done(zio_t *zio);
128extern int vdev_queue_length(vdev_t *vd);
129extern uint64_t vdev_queue_lastoffset(vdev_t *vd);
130extern void vdev_queue_register_lastoffset(vdev_t *vd, zio_t *zio);
131
132extern void vdev_config_dirty(vdev_t *vd);
133extern void vdev_config_clean(vdev_t *vd);
134extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
135
136extern void vdev_state_dirty(vdev_t *vd);
137extern void vdev_state_clean(vdev_t *vd);
138
139typedef enum vdev_config_flag {
140 VDEV_CONFIG_SPARE = 1 << 0,
141 VDEV_CONFIG_L2CACHE = 1 << 1,
142 VDEV_CONFIG_REMOVING = 1 << 2,
143 VDEV_CONFIG_MOS = 1 << 3
144} vdev_config_flag_t;
145
146extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
147extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
148 boolean_t getstats, vdev_config_flag_t flags);
149
150/*
151 * Label routines
152 */
153struct uberblock;
154extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
155extern int vdev_label_number(uint64_t psise, uint64_t offset);
156extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
157extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
158
159typedef enum {
160 VDEV_LABEL_CREATE, /* create/add a new device */
161 VDEV_LABEL_REPLACE, /* replace an existing device */
162 VDEV_LABEL_SPARE, /* add a new hot spare */
163 VDEV_LABEL_REMOVE, /* remove an existing device */
164 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */
165 VDEV_LABEL_SPLIT /* generating new label for split-off dev */
166} vdev_labeltype_t;
167
168extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
169
170extern int vdev_label_write_pad2(vdev_t *vd, const char *buf, size_t size);
171
172#ifdef __cplusplus
173}
174#endif
175
176#endif /* _SYS_VDEV_H */
177