xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/vdev.h (revision 468c413a79615e77179e8d98f22a7e513a8135bd)
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  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef _SYS_VDEV_H
27 #define	_SYS_VDEV_H
28 
29 #include <sys/spa.h>
30 #include <sys/zio.h>
31 #include <sys/dmu.h>
32 #include <sys/space_map.h>
33 #include <sys/fs/zfs.h>
34 
35 #ifdef	__cplusplus
36 extern "C" {
37 #endif
38 
39 typedef enum vdev_dtl_type {
40 	DTL_MISSING,	/* 0% replication: no copies of the data */
41 	DTL_PARTIAL,	/* less than 100% replication: some copies missing */
42 	DTL_SCRUB,	/* unable to fully repair during scrub/resilver */
43 	DTL_OUTAGE,	/* temporarily missing (used to attempt detach) */
44 	DTL_TYPES
45 } vdev_dtl_type_t;
46 
47 extern boolean_t zfs_nocacheflush;
48 
49 extern int vdev_open(vdev_t *);
50 extern void vdev_open_children(vdev_t *);
51 extern boolean_t vdev_uses_zvols(vdev_t *);
52 extern int vdev_validate(vdev_t *);
53 extern void vdev_close(vdev_t *);
54 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
55 extern void vdev_reopen(vdev_t *);
56 extern int vdev_validate_aux(vdev_t *vd);
57 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
58 
59 extern boolean_t vdev_is_bootable(vdev_t *vd);
60 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
61 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
62 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
63     uint64_t txg, uint64_t size);
64 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
65     uint64_t txg, uint64_t size);
66 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
67 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
68     int scrub_done);
69 extern boolean_t vdev_dtl_required(vdev_t *vd);
70 extern boolean_t vdev_resilver_needed(vdev_t *vd,
71     uint64_t *minp, uint64_t *maxp);
72 
73 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
74 extern void vdev_metaslab_fini(vdev_t *vd);
75 extern void vdev_metaslab_set_size(vdev_t *);
76 extern void vdev_expand(vdev_t *vd, uint64_t txg);
77 
78 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
79 extern void vdev_clear_stats(vdev_t *vd);
80 extern void vdev_stat_update(zio_t *zio, uint64_t psize);
81 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type,
82     boolean_t complete);
83 extern void vdev_propagate_state(vdev_t *vd);
84 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
85     vdev_aux_t aux);
86 
87 extern void vdev_space_update(vdev_t *vd, int64_t space_delta,
88     int64_t alloc_delta, int64_t defer_delta, boolean_t update_root);
89 
90 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
91 
92 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
93 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
94 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
95     vdev_state_t *);
96 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
97 extern void vdev_clear(spa_t *spa, vdev_t *vd);
98 
99 extern boolean_t vdev_is_dead(vdev_t *vd);
100 extern boolean_t vdev_readable(vdev_t *vd);
101 extern boolean_t vdev_writeable(vdev_t *vd);
102 extern boolean_t vdev_allocatable(vdev_t *vd);
103 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
104 
105 extern void vdev_cache_init(vdev_t *vd);
106 extern void vdev_cache_fini(vdev_t *vd);
107 extern int vdev_cache_read(zio_t *zio);
108 extern void vdev_cache_write(zio_t *zio);
109 extern void vdev_cache_purge(vdev_t *vd);
110 
111 extern void vdev_queue_init(vdev_t *vd);
112 extern void vdev_queue_fini(vdev_t *vd);
113 extern zio_t *vdev_queue_io(zio_t *zio);
114 extern void vdev_queue_io_done(zio_t *zio);
115 
116 extern void vdev_config_dirty(vdev_t *vd);
117 extern void vdev_config_clean(vdev_t *vd);
118 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg,
119     boolean_t);
120 
121 extern void vdev_state_dirty(vdev_t *vd);
122 extern void vdev_state_clean(vdev_t *vd);
123 
124 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
125 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
126     boolean_t getstats, boolean_t isspare, boolean_t isl2cache);
127 
128 /*
129  * Label routines
130  */
131 struct uberblock;
132 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
133 extern int vdev_label_number(uint64_t psise, uint64_t offset);
134 extern nvlist_t *vdev_label_read_config(vdev_t *vd);
135 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub);
136 
137 typedef enum {
138 	VDEV_LABEL_CREATE,	/* create/add a new device */
139 	VDEV_LABEL_REPLACE,	/* replace an existing device */
140 	VDEV_LABEL_SPARE,	/* add a new hot spare */
141 	VDEV_LABEL_REMOVE,	/* remove an existing device */
142 	VDEV_LABEL_L2CACHE	/* add an L2ARC cache device */
143 } vdev_labeltype_t;
144 
145 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
146 
147 #ifdef	__cplusplus
148 }
149 #endif
150 
151 #endif	/* _SYS_VDEV_H */
152