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
38extern "C" {
39#endif
40
41typedef 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
49extern boolean_t zfs_nocacheflush;
50
51extern void vdev_dbgmsg(vdev_t *vd, const char *fmt, ...);
52extern void vdev_dbgmsg_print_tree(vdev_t *, int);
53extern int vdev_open(vdev_t *);
54extern void vdev_open_children(vdev_t *);
55extern boolean_t vdev_uses_zvols(vdev_t *);
56extern int vdev_validate(vdev_t *);
57extern int vdev_copy_path_strict(vdev_t *, vdev_t *);
58extern void vdev_copy_path_relaxed(vdev_t *, vdev_t *);
59extern void vdev_close(vdev_t *);
60extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
61extern void vdev_reopen(vdev_t *);
62extern int vdev_validate_aux(vdev_t *vd);
63extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
64extern boolean_t vdev_is_concrete(vdev_t *vd);
65extern boolean_t vdev_is_bootable(vdev_t *vd);
66extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
67extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
68extern int vdev_count_leaves(spa_t *spa);
69extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
70    uint64_t txg, uint64_t size);
71extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
72    uint64_t txg, uint64_t size);
73extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
74extern boolean_t vdev_dtl_need_resilver(vdev_t *vd, uint64_t off, size_t size);
75extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
76    int scrub_done);
77extern boolean_t vdev_dtl_required(vdev_t *vd);
78extern boolean_t vdev_resilver_needed(vdev_t *vd,
79    uint64_t *minp, uint64_t *maxp);
80extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj,
81    dmu_tx_t *tx);
82extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx);
83extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx);
84extern void vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx);
85extern void vdev_indirect_mark_obsolete(vdev_t *vd, uint64_t offset,
86    uint64_t size);
87extern void spa_vdev_indirect_mark_obsolete(spa_t *spa, uint64_t vdev,
88    uint64_t offset, uint64_t size, dmu_tx_t *tx);
89
90extern void vdev_hold(vdev_t *);
91extern void vdev_rele(vdev_t *);
92
93extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
94extern void vdev_metaslab_fini(vdev_t *vd);
95extern void vdev_metaslab_set_size(vdev_t *);
96extern void vdev_expand(vdev_t *vd, uint64_t txg);
97extern void vdev_split(vdev_t *vd);
98extern void vdev_deadman(vdev_t *vd);
99extern void vdev_xlate(vdev_t *vd, const range_seg64_t *logical_rs,
100    range_seg64_t *physical_rs);
101
102extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
103extern void vdev_clear_stats(vdev_t *vd);
104extern void vdev_stat_update(zio_t *zio, uint64_t psize);
105extern void vdev_scan_stat_init(vdev_t *vd);
106extern void vdev_propagate_state(vdev_t *vd);
107extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
108    vdev_aux_t aux);
109extern boolean_t vdev_children_are_offline(vdev_t *vd);
110
111extern void vdev_space_update(vdev_t *vd,
112    int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
113
114extern int64_t vdev_deflated_space(vdev_t *vd, int64_t space);
115
116extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
117
118extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
119extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
120extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
121    vdev_state_t *);
122extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
123extern void vdev_clear(spa_t *spa, vdev_t *vd);
124
125extern boolean_t vdev_is_dead(vdev_t *vd);
126extern boolean_t vdev_readable(vdev_t *vd);
127extern boolean_t vdev_writeable(vdev_t *vd);
128extern boolean_t vdev_allocatable(vdev_t *vd);
129extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
130extern boolean_t vdev_is_spacemap_addressable(vdev_t *vd);
131
132extern void vdev_cache_init(vdev_t *vd);
133extern void vdev_cache_fini(vdev_t *vd);
134extern boolean_t vdev_cache_read(zio_t *zio);
135extern void vdev_cache_write(zio_t *zio);
136extern void vdev_cache_purge(vdev_t *vd);
137
138extern void vdev_queue_init(vdev_t *vd);
139extern void vdev_queue_fini(vdev_t *vd);
140extern zio_t *vdev_queue_io(zio_t *zio);
141extern void vdev_queue_io_done(zio_t *zio);
142extern void vdev_queue_change_io_priority(zio_t *zio, zio_priority_t priority);
143
144extern int vdev_queue_length(vdev_t *vd);
145extern uint64_t vdev_queue_last_offset(vdev_t *vd);
146
147extern void vdev_config_dirty(vdev_t *vd);
148extern void vdev_config_clean(vdev_t *vd);
149extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
150
151extern void vdev_state_dirty(vdev_t *vd);
152extern void vdev_state_clean(vdev_t *vd);
153
154extern void vdev_set_deferred_resilver(spa_t *spa, vdev_t *vd);
155
156typedef enum vdev_config_flag {
157	VDEV_CONFIG_SPARE = 1 << 0,
158	VDEV_CONFIG_L2CACHE = 1 << 1,
159	VDEV_CONFIG_REMOVING = 1 << 2,
160	VDEV_CONFIG_MOS = 1 << 3,
161	VDEV_CONFIG_MISSING = 1 << 4
162} vdev_config_flag_t;
163
164extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
165extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
166    boolean_t getstats, vdev_config_flag_t flags);
167
168/*
169 * Label routines
170 */
171struct uberblock;
172extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
173extern int vdev_label_number(uint64_t psise, uint64_t offset);
174extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
175extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
176extern void vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t
177    offset, uint64_t size, zio_done_func_t *done, void *private, int flags);
178
179typedef enum {
180	VDEV_LABEL_CREATE,	/* create/add a new device */
181	VDEV_LABEL_REPLACE,	/* replace an existing device */
182	VDEV_LABEL_SPARE,	/* add a new hot spare */
183	VDEV_LABEL_REMOVE,	/* remove an existing device */
184	VDEV_LABEL_L2CACHE,	/* add an L2ARC cache device */
185	VDEV_LABEL_SPLIT	/* generating new label for split-off dev */
186} vdev_labeltype_t;
187
188extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
189
190#ifdef	__cplusplus
191}
192#endif
193
194#endif	/* _SYS_VDEV_H */
195