vdev.h revision 263397 
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 void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
65    uint64_t txg, uint64_t size);
66extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
67    uint64_t txg, uint64_t size);
68extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
69extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
70    int scrub_done);
71extern boolean_t vdev_dtl_required(vdev_t *vd);
72extern boolean_t vdev_resilver_needed(vdev_t *vd,
73    uint64_t *minp, uint64_t *maxp);
74
75extern void vdev_hold(vdev_t *);
76extern void vdev_rele(vdev_t *);
77
78extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
79extern void vdev_metaslab_fini(vdev_t *vd);
80extern void vdev_metaslab_set_size(vdev_t *);
81extern void vdev_ashift_optimize(vdev_t *);
82extern void vdev_expand(vdev_t *vd, uint64_t txg);
83extern void vdev_split(vdev_t *vd);
84extern void vdev_deadman(vdev_t *vd);
85
86
87extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
88extern void vdev_clear_stats(vdev_t *vd);
89extern void vdev_stat_update(zio_t *zio, uint64_t psize);
90extern void vdev_scan_stat_init(vdev_t *vd);
91extern void vdev_propagate_state(vdev_t *vd);
92extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
93    vdev_aux_t aux);
94
95extern void vdev_space_update(vdev_t *vd,
96    int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
97
98extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
99
100extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
101extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
102extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
103    vdev_state_t *);
104extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
105extern void vdev_clear(spa_t *spa, vdev_t *vd);
106
107extern boolean_t vdev_is_dead(vdev_t *vd);
108extern boolean_t vdev_readable(vdev_t *vd);
109extern boolean_t vdev_writeable(vdev_t *vd);
110extern boolean_t vdev_allocatable(vdev_t *vd);
111extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
112
113extern void vdev_cache_init(vdev_t *vd);
114extern void vdev_cache_fini(vdev_t *vd);
115extern boolean_t vdev_cache_read(zio_t *zio);
116extern void vdev_cache_write(zio_t *zio);
117extern void vdev_cache_purge(vdev_t *vd);
118
119extern void vdev_queue_init(vdev_t *vd);
120extern void vdev_queue_fini(vdev_t *vd);
121extern zio_t *vdev_queue_io(zio_t *zio);
122extern void vdev_queue_io_done(zio_t *zio);
123
124extern void vdev_config_dirty(vdev_t *vd);
125extern void vdev_config_clean(vdev_t *vd);
126extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg,
127    boolean_t);
128
129extern void vdev_state_dirty(vdev_t *vd);
130extern void vdev_state_clean(vdev_t *vd);
131
132typedef enum vdev_config_flag {
133	VDEV_CONFIG_SPARE = 1 << 0,
134	VDEV_CONFIG_L2CACHE = 1 << 1,
135	VDEV_CONFIG_REMOVING = 1 << 2
136} vdev_config_flag_t;
137
138extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
139extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
140    boolean_t getstats, vdev_config_flag_t flags);
141
142/*
143 * Label routines
144 */
145struct uberblock;
146extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
147extern int vdev_label_number(uint64_t psise, uint64_t offset);
148extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
149extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
150
151typedef enum {
152	VDEV_LABEL_CREATE,	/* create/add a new device */
153	VDEV_LABEL_REPLACE,	/* replace an existing device */
154	VDEV_LABEL_SPARE,	/* add a new hot spare */
155	VDEV_LABEL_REMOVE,	/* remove an existing device */
156	VDEV_LABEL_L2CACHE,	/* add an L2ARC cache device */
157	VDEV_LABEL_SPLIT	/* generating new label for split-off dev */
158} vdev_labeltype_t;
159
160extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
161
162#ifdef	__cplusplus
163}
164#endif
165
166#endif	/* _SYS_VDEV_H */
167