xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/vdev.h (revision 12a8814c13fbb1d6d58616cf090ea5815dc107f9)
1fa9e4066Sahrens /*
2fa9e4066Sahrens  * CDDL HEADER START
3fa9e4066Sahrens  *
4fa9e4066Sahrens  * The contents of this file are subject to the terms of the
5441d80aaSlling  * Common Development and Distribution License (the "License").
6441d80aaSlling  * You may not use this file except in compliance with the License.
7fa9e4066Sahrens  *
8fa9e4066Sahrens  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9fa9e4066Sahrens  * or http://www.opensolaris.org/os/licensing.
10fa9e4066Sahrens  * See the License for the specific language governing permissions
11fa9e4066Sahrens  * and limitations under the License.
12fa9e4066Sahrens  *
13fa9e4066Sahrens  * When distributing Covered Code, include this CDDL HEADER in each
14fa9e4066Sahrens  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15fa9e4066Sahrens  * If applicable, add the following below this CDDL HEADER, with the
16fa9e4066Sahrens  * fields enclosed by brackets "[]" replaced with your own identifying
17fa9e4066Sahrens  * information: Portions Copyright [yyyy] [name of copyright owner]
18fa9e4066Sahrens  *
19fa9e4066Sahrens  * CDDL HEADER END
20fa9e4066Sahrens  */
21ad135b5dSChristopher Siden 
22fa9e4066Sahrens /*
233f9d6ad7SLin Ling  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
2486714001SSerapheim Dimitropoulos  * Copyright (c) 2011, 2017 by Delphix. All rights reserved.
25663207adSDon Brady  * Copyright (c) 2017, Intel Corporation.
26fa9e4066Sahrens  */
27fa9e4066Sahrens 
28fa9e4066Sahrens #ifndef _SYS_VDEV_H
29fa9e4066Sahrens #define	_SYS_VDEV_H
30fa9e4066Sahrens 
31fa9e4066Sahrens #include <sys/spa.h>
32fa9e4066Sahrens #include <sys/zio.h>
33fa9e4066Sahrens #include <sys/dmu.h>
34fa9e4066Sahrens #include <sys/space_map.h>
35fa9e4066Sahrens #include <sys/fs/zfs.h>
36fa9e4066Sahrens 
37fa9e4066Sahrens #ifdef	__cplusplus
38fa9e4066Sahrens extern "C" {
39fa9e4066Sahrens #endif
40fa9e4066Sahrens 
418ad4d6ddSJeff Bonwick typedef enum vdev_dtl_type {
428ad4d6ddSJeff Bonwick 	DTL_MISSING,	/* 0% replication: no copies of the data */
438ad4d6ddSJeff Bonwick 	DTL_PARTIAL,	/* less than 100% replication: some copies missing */
448ad4d6ddSJeff Bonwick 	DTL_SCRUB,	/* unable to fully repair during scrub/resilver */
458ad4d6ddSJeff Bonwick 	DTL_OUTAGE,	/* temporarily missing (used to attempt detach) */
468ad4d6ddSJeff Bonwick 	DTL_TYPES
478ad4d6ddSJeff Bonwick } vdev_dtl_type_t;
488ad4d6ddSJeff Bonwick 
49416e0cd8Sek extern boolean_t zfs_nocacheflush;
50416e0cd8Sek 
513ee8c80cSPavel Zakharov extern void vdev_dbgmsg(vdev_t *vd, const char *fmt, ...);
526f793812SPavel Zakharov extern void vdev_dbgmsg_print_tree(vdev_t *, int);
53fa9e4066Sahrens extern int vdev_open(vdev_t *);
54681d9761SEric Taylor extern void vdev_open_children(vdev_t *);
55681d9761SEric Taylor extern boolean_t vdev_uses_zvols(vdev_t *);
566f793812SPavel Zakharov extern int vdev_validate(vdev_t *);
576f793812SPavel Zakharov extern int vdev_copy_path_strict(vdev_t *, vdev_t *);
586f793812SPavel Zakharov extern void vdev_copy_path_relaxed(vdev_t *, vdev_t *);
59fa9e4066Sahrens extern void vdev_close(vdev_t *);
6099653d4eSeschrock extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
61ea8dc4b6Seschrock extern void vdev_reopen(vdev_t *);
62fa94a07fSbrendan extern int vdev_validate_aux(vdev_t *vd);
63e14bb325SJeff Bonwick extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
645cabbc6bSPrashanth Sreenivasa extern boolean_t vdev_is_concrete(vdev_t *vd);
6515e6edf1Sgw extern boolean_t vdev_is_bootable(vdev_t *vd);
66fa9e4066Sahrens extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
67fa9e4066Sahrens extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
6812380e1eSArne Jansen extern int vdev_count_leaves(spa_t *spa);
698ad4d6ddSJeff Bonwick extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
708ad4d6ddSJeff Bonwick     uint64_t txg, uint64_t size);
718ad4d6ddSJeff Bonwick extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
728ad4d6ddSJeff Bonwick     uint64_t txg, uint64_t size);
738ad4d6ddSJeff Bonwick extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
74a3874b8bSToomas Soome extern boolean_t vdev_dtl_need_resilver(vdev_t *vd, uint64_t off, size_t size);
75fa9e4066Sahrens extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
76fa9e4066Sahrens     int scrub_done);
778ad4d6ddSJeff Bonwick extern boolean_t vdev_dtl_required(vdev_t *vd);
78088f3894Sahrens extern boolean_t vdev_resilver_needed(vdev_t *vd,
79088f3894Sahrens     uint64_t *minp, uint64_t *maxp);
80215198a6SJoe Stein extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj,
81215198a6SJoe Stein     dmu_tx_t *tx);
82215198a6SJoe Stein extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx);
83215198a6SJoe Stein extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx);
845cabbc6bSPrashanth Sreenivasa extern void vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx);
855cabbc6bSPrashanth Sreenivasa extern void vdev_indirect_mark_obsolete(vdev_t *vd, uint64_t offset,
8686714001SSerapheim Dimitropoulos     uint64_t size);
875cabbc6bSPrashanth Sreenivasa extern void spa_vdev_indirect_mark_obsolete(spa_t *spa, uint64_t vdev,
885cabbc6bSPrashanth Sreenivasa     uint64_t offset, uint64_t size, dmu_tx_t *tx);
89fa9e4066Sahrens 
90dcba9f3fSGeorge Wilson extern void vdev_hold(vdev_t *);
91dcba9f3fSGeorge Wilson extern void vdev_rele(vdev_t *);
92dcba9f3fSGeorge Wilson 
93ea8dc4b6Seschrock extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
94fa9e4066Sahrens extern void vdev_metaslab_fini(vdev_t *vd);
95573ca77eSGeorge Wilson extern void vdev_metaslab_set_size(vdev_t *);
96573ca77eSGeorge Wilson extern void vdev_expand(vdev_t *vd, uint64_t txg);
971195e687SMark J Musante extern void vdev_split(vdev_t *vd);
98283b8460SGeorge.Wilson extern void vdev_deadman(vdev_t *vd);
991195e687SMark J Musante 
100fa9e4066Sahrens extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
101fa94a07fSbrendan extern void vdev_clear_stats(vdev_t *vd);
102e14bb325SJeff Bonwick extern void vdev_stat_update(zio_t *zio, uint64_t psize);
1033f9d6ad7SLin Ling extern void vdev_scan_stat_init(vdev_t *vd);
10444cd46caSbillm extern void vdev_propagate_state(vdev_t *vd);
105ea8dc4b6Seschrock extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
106ea8dc4b6Seschrock     vdev_aux_t aux);
1076f793812SPavel Zakharov extern boolean_t vdev_children_are_offline(vdev_t *vd);
108fa9e4066Sahrens 
109b24ab676SJeff Bonwick extern void vdev_space_update(vdev_t *vd,
110b24ab676SJeff Bonwick     int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
111fa9e4066Sahrens 
112663207adSDon Brady extern int64_t vdev_deflated_space(vdev_t *vd, int64_t space);
113663207adSDon Brady 
114fa9e4066Sahrens extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
115fa9e4066Sahrens 
116069f55e2SEric Schrock extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
117069f55e2SEric Schrock extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
1183d7072f8Seschrock extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
1193d7072f8Seschrock     vdev_state_t *);
1203d7072f8Seschrock extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
121e14bb325SJeff Bonwick extern void vdev_clear(spa_t *spa, vdev_t *vd);
122fa9e4066Sahrens 
123e14bb325SJeff Bonwick extern boolean_t vdev_is_dead(vdev_t *vd);
124e14bb325SJeff Bonwick extern boolean_t vdev_readable(vdev_t *vd);
125e14bb325SJeff Bonwick extern boolean_t vdev_writeable(vdev_t *vd);
126a31e6787SGeorge Wilson extern boolean_t vdev_allocatable(vdev_t *vd);
127e14bb325SJeff Bonwick extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
12886714001SSerapheim Dimitropoulos extern boolean_t vdev_is_spacemap_addressable(vdev_t *vd);
129fa9e4066Sahrens 
130fa9e4066Sahrens extern void vdev_cache_init(vdev_t *vd);
131fa9e4066Sahrens extern void vdev_cache_fini(vdev_t *vd);
13243466aaeSMax Grossman extern boolean_t vdev_cache_read(zio_t *zio);
133fa9e4066Sahrens extern void vdev_cache_write(zio_t *zio);
1343d7072f8Seschrock extern void vdev_cache_purge(vdev_t *vd);
135fa9e4066Sahrens 
136fa9e4066Sahrens extern void vdev_queue_init(vdev_t *vd);
137fa9e4066Sahrens extern void vdev_queue_fini(vdev_t *vd);
138fa9e4066Sahrens extern zio_t *vdev_queue_io(zio_t *zio);
139fa9e4066Sahrens extern void vdev_queue_io_done(zio_t *zio);
140a3874b8bSToomas Soome extern void vdev_queue_change_io_priority(zio_t *zio, zio_priority_t priority);
141fa9e4066Sahrens 
142*12a8814cSTom Caputi extern int vdev_queue_length(vdev_t *vd);
143*12a8814cSTom Caputi extern uint64_t vdev_queue_last_offset(vdev_t *vd);
144*12a8814cSTom Caputi 
145fa9e4066Sahrens extern void vdev_config_dirty(vdev_t *vd);
146fa9e4066Sahrens extern void vdev_config_clean(vdev_t *vd);
147eb5bb584SWill Andrews extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
148e14bb325SJeff Bonwick 
149e14bb325SJeff Bonwick extern void vdev_state_dirty(vdev_t *vd);
150e14bb325SJeff Bonwick extern void vdev_state_clean(vdev_t *vd);
151fa9e4066Sahrens 
1523f9d6ad7SLin Ling typedef enum vdev_config_flag {
1533f9d6ad7SLin Ling 	VDEV_CONFIG_SPARE = 1 << 0,
1543f9d6ad7SLin Ling 	VDEV_CONFIG_L2CACHE = 1 << 1,
155215198a6SJoe Stein 	VDEV_CONFIG_REMOVING = 1 << 2,
1566f793812SPavel Zakharov 	VDEV_CONFIG_MOS = 1 << 3,
1576f793812SPavel Zakharov 	VDEV_CONFIG_MISSING = 1 << 4
1583f9d6ad7SLin Ling } vdev_config_flag_t;
1593f9d6ad7SLin Ling 
16088ecc943SGeorge Wilson extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
16199653d4eSeschrock extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
1623f9d6ad7SLin Ling     boolean_t getstats, vdev_config_flag_t flags);
163fa9e4066Sahrens 
164fa9e4066Sahrens /*
165fa9e4066Sahrens  * Label routines
166fa9e4066Sahrens  */
167fa9e4066Sahrens struct uberblock;
168fa9e4066Sahrens extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
16921bf64a7Sgw extern int vdev_label_number(uint64_t psise, uint64_t offset);
170dfbb9432SGeorge Wilson extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
171ad135b5dSChristopher Siden extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
172e0f1c0afSOlaf Faaland extern void vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t
173e0f1c0afSOlaf Faaland     offset, uint64_t size, zio_done_func_t *done, void *private, int flags);
17439c23413Seschrock 
17539c23413Seschrock typedef enum {
17639c23413Seschrock 	VDEV_LABEL_CREATE,	/* create/add a new device */
17739c23413Seschrock 	VDEV_LABEL_REPLACE,	/* replace an existing device */
17839c23413Seschrock 	VDEV_LABEL_SPARE,	/* add a new hot spare */
179fa94a07fSbrendan 	VDEV_LABEL_REMOVE,	/* remove an existing device */
1801195e687SMark J Musante 	VDEV_LABEL_L2CACHE,	/* add an L2ARC cache device */
1811195e687SMark J Musante 	VDEV_LABEL_SPLIT	/* generating new label for split-off dev */
18239c23413Seschrock } vdev_labeltype_t;
18339c23413Seschrock 
18439c23413Seschrock extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
185fa9e4066Sahrens 
186fa9e4066Sahrens #ifdef	__cplusplus
187fa9e4066Sahrens }
188fa9e4066Sahrens #endif
189fa9e4066Sahrens 
190fa9e4066Sahrens #endif	/* _SYS_VDEV_H */
191