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) 2012 by Delphix. All rights reserved.
25 * Copyright (c) 2013 Steven Hartland. All rights reserved.
26 */
27
28 #ifndef _SYS_VDEV_H
29 #define _SYS_VDEV_H
30
31 #include <sys/spa.h>
32 #include <sys/zio.h>
33 #include <sys/dmu.h>
34 #include <sys/space_map.h>
35 #include <sys/fs/zfs.h>
36
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40
41 typedef enum vdev_dtl_type {
42 DTL_MISSING, /* 0% replication: no copies of the data */
43 DTL_PARTIAL, /* less than 100% replication: some copies missing */
44 DTL_SCRUB, /* unable to fully repair during scrub/resilver */
45 DTL_OUTAGE, /* temporarily missing (used to attempt detach) */
46 DTL_TYPES
47 } vdev_dtl_type_t;
48
49 extern boolean_t zfs_nocacheflush;
50
51 extern int vdev_open(vdev_t *);
52 extern void vdev_open_children(vdev_t *);
53 extern boolean_t vdev_uses_zvols(vdev_t *);
54 extern int vdev_validate(vdev_t *, boolean_t);
55 extern void vdev_close(vdev_t *);
56 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
57 extern void vdev_reopen(vdev_t *);
58 extern int vdev_validate_aux(vdev_t *vd);
59 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
60
61 extern boolean_t vdev_is_bootable(vdev_t *vd);
62 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
63 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
64 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
65 uint64_t txg, uint64_t size);
66 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
67 uint64_t txg, uint64_t size);
68 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
69 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
70 int scrub_done);
71 extern boolean_t vdev_dtl_required(vdev_t *vd);
72 extern boolean_t vdev_resilver_needed(vdev_t *vd,
73 uint64_t *minp, uint64_t *maxp);
74
75 extern void vdev_hold(vdev_t *);
76 extern void vdev_rele(vdev_t *);
77
78 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
79 extern void vdev_metaslab_fini(vdev_t *vd);
80 extern void vdev_metaslab_set_size(vdev_t *);
81 extern void vdev_expand(vdev_t *vd, uint64_t txg);
82 extern void vdev_split(vdev_t *vd);
83 extern void vdev_deadman(vdev_t *vd);
84
85
86 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
87 extern void vdev_clear_stats(vdev_t *vd);
88 extern void vdev_stat_update(zio_t *zio, uint64_t psize);
89 extern void vdev_scan_stat_init(vdev_t *vd);
90 extern void vdev_propagate_state(vdev_t *vd);
91 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
92 vdev_aux_t aux);
93
94 extern void vdev_space_update(vdev_t *vd,
95 int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
96
97 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
98
99 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
100 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
101 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
102 vdev_state_t *);
103 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
104 extern void vdev_clear(spa_t *spa, vdev_t *vd);
105
106 extern boolean_t vdev_is_dead(vdev_t *vd);
107 extern boolean_t vdev_readable(vdev_t *vd);
108 extern boolean_t vdev_writeable(vdev_t *vd);
109 extern boolean_t vdev_allocatable(vdev_t *vd);
110 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
111
112 extern void vdev_cache_init(vdev_t *vd);
113 extern void vdev_cache_fini(vdev_t *vd);
114 extern int vdev_cache_read(zio_t *zio);
115 extern void vdev_cache_write(zio_t *zio);
116 extern void vdev_cache_purge(vdev_t *vd);
117
118 extern void vdev_queue_init(vdev_t *vd);
119 extern void vdev_queue_fini(vdev_t *vd);
120 extern zio_t *vdev_queue_io(zio_t *zio);
121 extern void vdev_queue_io_done(zio_t *zio);
122 extern int vdev_queue_length(vdev_t *vd);
123 extern uint64_t vdev_queue_lastoffset(vdev_t *vd);
124 extern void vdev_queue_register_lastoffset(vdev_t *vd, zio_t *zio);
125
126 extern void vdev_config_dirty(vdev_t *vd);
127 extern void vdev_config_clean(vdev_t *vd);
128 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg,
129 boolean_t);
130
131 extern void vdev_state_dirty(vdev_t *vd);
132 extern void vdev_state_clean(vdev_t *vd);
133
134 typedef enum vdev_config_flag {
135 VDEV_CONFIG_SPARE = 1 << 0,
136 VDEV_CONFIG_L2CACHE = 1 << 1,
137 VDEV_CONFIG_REMOVING = 1 << 2
138 } vdev_config_flag_t;
139
140 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
141 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
142 boolean_t getstats, vdev_config_flag_t flags);
143
144 /*
145 * Label routines
146 */
147 struct uberblock;
148 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
149 extern int vdev_label_number(uint64_t psise, uint64_t offset);
150 extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
151 extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
152
153 typedef enum {
154 VDEV_LABEL_CREATE, /* create/add a new device */
155 VDEV_LABEL_REPLACE, /* replace an existing device */
156 VDEV_LABEL_SPARE, /* add a new hot spare */
157 VDEV_LABEL_REMOVE, /* remove an existing device */
158 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */
159 VDEV_LABEL_SPLIT /* generating new label for split-off dev */
160 } vdev_labeltype_t;
161
162 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
163
164 #ifdef __cplusplus
165 }
166 #endif
167
168 #endif /* _SYS_VDEV_H */