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 * Copyright 2015 Nexenta Systems, Inc. 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 typedef struct vdev_trim_info {
50 vdev_t *vti_vdev;
51 uint64_t vti_txg; /* ignored for manual trim */
52 void (*vti_done_cb)(void *);
53 void *vti_done_arg;
54 } vdev_trim_info_t;
55
56 extern boolean_t zfs_nocacheflush;
57
58 extern int vdev_open(vdev_t *);
59 extern void vdev_open_children(vdev_t *);
60 extern boolean_t vdev_uses_zvols(vdev_t *);
61 extern int vdev_validate(vdev_t *, boolean_t);
62 extern void vdev_close(vdev_t *);
63 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
64 extern void vdev_reopen(vdev_t *);
65 extern int vdev_validate_aux(vdev_t *vd);
66 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
67
68 extern boolean_t vdev_is_bootable(vdev_t *vd);
69 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
70 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
71 extern int vdev_count_leaves(spa_t *spa);
72 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
73 uint64_t txg, uint64_t size);
74 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
75 uint64_t txg, uint64_t size);
76 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
77 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
78 int scrub_done);
79 extern boolean_t vdev_dtl_required(vdev_t *vd);
80 extern boolean_t vdev_resilver_needed(vdev_t *vd,
81 uint64_t *minp, uint64_t *maxp);
82 extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj,
83 dmu_tx_t *tx);
84 extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx);
85 extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx);
86
87 extern void vdev_hold(vdev_t *);
88 extern void vdev_rele(vdev_t *);
89
90 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
91 extern void vdev_metaslab_fini(vdev_t *vd);
92 extern void vdev_metaslab_set_size(vdev_t *);
93 extern void vdev_expand(vdev_t *vd, uint64_t txg);
94 extern void vdev_split(vdev_t *vd);
95 extern void vdev_deadman(vdev_t *vd);
96
97
98 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
99 extern void vdev_clear_stats(vdev_t *vd);
100 extern void vdev_stat_update(zio_t *zio, uint64_t psize);
101 extern void vdev_scan_stat_init(vdev_t *vd);
102 extern void vdev_propagate_state(vdev_t *vd);
103 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
104 vdev_aux_t aux);
105
106 extern void vdev_space_update(vdev_t *vd,
107 int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
108
109 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
110
111 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
112 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
113 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
114 vdev_state_t *);
115 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
116 extern void vdev_clear(spa_t *spa, vdev_t *vd);
117
118 extern boolean_t vdev_is_dead(vdev_t *vd);
119 extern boolean_t vdev_readable(vdev_t *vd);
120 extern boolean_t vdev_writeable(vdev_t *vd);
121 extern boolean_t vdev_allocatable(vdev_t *vd);
122 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
123
124 extern void vdev_cache_init(vdev_t *vd);
125 extern void vdev_cache_fini(vdev_t *vd);
126 extern boolean_t vdev_cache_read(zio_t *zio);
127 extern void vdev_cache_write(zio_t *zio);
128 extern void vdev_cache_purge(vdev_t *vd);
129
130 extern void vdev_queue_init(vdev_t *vd);
131 extern void vdev_queue_fini(vdev_t *vd);
132 extern zio_t *vdev_queue_io(zio_t *zio);
133 extern void vdev_queue_io_done(zio_t *zio);
134
135 extern void vdev_config_dirty(vdev_t *vd);
136 extern void vdev_config_clean(vdev_t *vd);
137 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
138
139 extern void vdev_state_dirty(vdev_t *vd);
140 extern void vdev_state_clean(vdev_t *vd);
141
142 typedef enum vdev_config_flag {
143 VDEV_CONFIG_SPARE = 1 << 0,
144 VDEV_CONFIG_L2CACHE = 1 << 1,
145 VDEV_CONFIG_REMOVING = 1 << 2,
146 VDEV_CONFIG_MOS = 1 << 3
147 } vdev_config_flag_t;
148
149 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
150 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
151 boolean_t getstats, vdev_config_flag_t flags);
152
153 extern boolean_t vdev_type_is_ddt(vdev_t *vd);
154
155 extern void vdev_man_trim(vdev_trim_info_t *vti);
156 extern void vdev_auto_trim(vdev_trim_info_t *vti);
157
158 /*
159 * Label routines
160 */
161 struct uberblock;
162 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
163 extern int vdev_label_number(uint64_t psise, uint64_t offset);
164 extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
165 extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
166
167 typedef enum {
168 VDEV_LABEL_CREATE, /* create/add a new device */
169 VDEV_LABEL_REPLACE, /* replace an existing device */
170 VDEV_LABEL_SPARE, /* add a new hot spare */
171 VDEV_LABEL_REMOVE, /* remove an existing device */
172 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */
173 VDEV_LABEL_SPLIT /* generating new label for split-off dev */
174 } vdev_labeltype_t;
175
176 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
177
178 extern boolean_t vdev_is_special(vdev_t *vd);
179
180 #ifdef __cplusplus
181 }
182 #endif
183
184 #endif /* _SYS_VDEV_H */