xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/vdev.h (revision 663207ad)
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) 2011, 2017 by Delphix. All rights reserved.
25  * Copyright (c) 2017, Intel Corporation.
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 void vdev_dbgmsg(vdev_t *vd, const char *fmt, ...);
52 extern void vdev_dbgmsg_print_tree(vdev_t *, int);
53 extern int vdev_open(vdev_t *);
54 extern void vdev_open_children(vdev_t *);
55 extern boolean_t vdev_uses_zvols(vdev_t *);
56 extern int vdev_validate(vdev_t *);
57 extern int vdev_copy_path_strict(vdev_t *, vdev_t *);
58 extern void vdev_copy_path_relaxed(vdev_t *, vdev_t *);
59 extern void vdev_close(vdev_t *);
60 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
61 extern void vdev_reopen(vdev_t *);
62 extern int vdev_validate_aux(vdev_t *vd);
63 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
64 extern boolean_t vdev_is_concrete(vdev_t *vd);
65 extern boolean_t vdev_is_bootable(vdev_t *vd);
66 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
67 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
68 extern int vdev_count_leaves(spa_t *spa);
69 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
70     uint64_t txg, uint64_t size);
71 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
72     uint64_t txg, uint64_t size);
73 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
74 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
75     int scrub_done);
76 extern boolean_t vdev_dtl_required(vdev_t *vd);
77 extern boolean_t vdev_resilver_needed(vdev_t *vd,
78     uint64_t *minp, uint64_t *maxp);
79 extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj,
80     dmu_tx_t *tx);
81 extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx);
82 extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx);
83 extern void vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx);
84 extern void vdev_indirect_mark_obsolete(vdev_t *vd, uint64_t offset,
85     uint64_t size);
86 extern void spa_vdev_indirect_mark_obsolete(spa_t *spa, uint64_t vdev,
87     uint64_t offset, uint64_t size, dmu_tx_t *tx);
88 
89 extern void vdev_hold(vdev_t *);
90 extern void vdev_rele(vdev_t *);
91 
92 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
93 extern void vdev_metaslab_fini(vdev_t *vd);
94 extern void vdev_metaslab_set_size(vdev_t *);
95 extern void vdev_expand(vdev_t *vd, uint64_t txg);
96 extern void vdev_split(vdev_t *vd);
97 extern void vdev_deadman(vdev_t *vd);
98 
99 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
100 extern void vdev_clear_stats(vdev_t *vd);
101 extern void vdev_stat_update(zio_t *zio, uint64_t psize);
102 extern void vdev_scan_stat_init(vdev_t *vd);
103 extern void vdev_propagate_state(vdev_t *vd);
104 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
105     vdev_aux_t aux);
106 extern boolean_t vdev_children_are_offline(vdev_t *vd);
107 
108 extern void vdev_space_update(vdev_t *vd,
109     int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
110 
111 extern int64_t vdev_deflated_space(vdev_t *vd, int64_t space);
112 
113 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
114 
115 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
116 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
117 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
118     vdev_state_t *);
119 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
120 extern void vdev_clear(spa_t *spa, vdev_t *vd);
121 
122 extern boolean_t vdev_is_dead(vdev_t *vd);
123 extern boolean_t vdev_readable(vdev_t *vd);
124 extern boolean_t vdev_writeable(vdev_t *vd);
125 extern boolean_t vdev_allocatable(vdev_t *vd);
126 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
127 extern boolean_t vdev_is_spacemap_addressable(vdev_t *vd);
128 
129 extern void vdev_cache_init(vdev_t *vd);
130 extern void vdev_cache_fini(vdev_t *vd);
131 extern boolean_t vdev_cache_read(zio_t *zio);
132 extern void vdev_cache_write(zio_t *zio);
133 extern void vdev_cache_purge(vdev_t *vd);
134 
135 extern void vdev_queue_init(vdev_t *vd);
136 extern void vdev_queue_fini(vdev_t *vd);
137 extern zio_t *vdev_queue_io(zio_t *zio);
138 extern void vdev_queue_io_done(zio_t *zio);
139 
140 extern void vdev_config_dirty(vdev_t *vd);
141 extern void vdev_config_clean(vdev_t *vd);
142 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
143 
144 extern void vdev_state_dirty(vdev_t *vd);
145 extern void vdev_state_clean(vdev_t *vd);
146 
147 typedef enum vdev_config_flag {
148 	VDEV_CONFIG_SPARE = 1 << 0,
149 	VDEV_CONFIG_L2CACHE = 1 << 1,
150 	VDEV_CONFIG_REMOVING = 1 << 2,
151 	VDEV_CONFIG_MOS = 1 << 3,
152 	VDEV_CONFIG_MISSING = 1 << 4
153 } vdev_config_flag_t;
154 
155 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
156 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
157     boolean_t getstats, vdev_config_flag_t flags);
158 
159 /*
160  * Label routines
161  */
162 struct uberblock;
163 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
164 extern int vdev_label_number(uint64_t psise, uint64_t offset);
165 extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
166 extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
167 extern void vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t
168     offset, uint64_t size, zio_done_func_t *done, void *private, int flags);
169 
170 typedef enum {
171 	VDEV_LABEL_CREATE,	/* create/add a new device */
172 	VDEV_LABEL_REPLACE,	/* replace an existing device */
173 	VDEV_LABEL_SPARE,	/* add a new hot spare */
174 	VDEV_LABEL_REMOVE,	/* remove an existing device */
175 	VDEV_LABEL_L2CACHE,	/* add an L2ARC cache device */
176 	VDEV_LABEL_SPLIT	/* generating new label for split-off dev */
177 } vdev_labeltype_t;
178 
179 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
180 
181 #ifdef	__cplusplus
182 }
183 #endif
184 
185 #endif	/* _SYS_VDEV_H */
186