xref: /onnv-gate/usr/src/uts/common/fs/zfs/sys/vdev.h (revision 1986)
1789Sahrens /*
2789Sahrens  * CDDL HEADER START
3789Sahrens  *
4789Sahrens  * The contents of this file are subject to the terms of the
51485Slling  * Common Development and Distribution License (the "License").
61485Slling  * You may not use this file except in compliance with the License.
7789Sahrens  *
8789Sahrens  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9789Sahrens  * or http://www.opensolaris.org/os/licensing.
10789Sahrens  * See the License for the specific language governing permissions
11789Sahrens  * and limitations under the License.
12789Sahrens  *
13789Sahrens  * When distributing Covered Code, include this CDDL HEADER in each
14789Sahrens  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15789Sahrens  * If applicable, add the following below this CDDL HEADER, with the
16789Sahrens  * fields enclosed by brackets "[]" replaced with your own identifying
17789Sahrens  * information: Portions Copyright [yyyy] [name of copyright owner]
18789Sahrens  *
19789Sahrens  * CDDL HEADER END
20789Sahrens  */
21789Sahrens /*
221485Slling  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23789Sahrens  * Use is subject to license terms.
24789Sahrens  */
25789Sahrens 
26789Sahrens #ifndef _SYS_VDEV_H
27789Sahrens #define	_SYS_VDEV_H
28789Sahrens 
29789Sahrens #pragma ident	"%Z%%M%	%I%	%E% SMI"
30789Sahrens 
31789Sahrens #include <sys/spa.h>
32789Sahrens #include <sys/zio.h>
33789Sahrens #include <sys/dmu.h>
34789Sahrens #include <sys/space_map.h>
35789Sahrens #include <sys/fs/zfs.h>
36789Sahrens 
37789Sahrens #ifdef	__cplusplus
38789Sahrens extern "C" {
39789Sahrens #endif
40789Sahrens 
41789Sahrens /*
42789Sahrens  * Vdev knobs.
43789Sahrens  */
44789Sahrens typedef struct vdev_knob {
45789Sahrens 	char		*vk_name;		/* knob name		*/
46789Sahrens 	char		*vk_desc;		/* knob description	*/
47789Sahrens 	uint64_t	vk_min;			/* minimum legal value	*/
48789Sahrens 	uint64_t	vk_max;			/* maximum legal value	*/
49789Sahrens 	uint64_t	vk_default;		/* default value	*/
50789Sahrens 	size_t		vk_offset;		/* offset into vdev_t	*/
51789Sahrens } vdev_knob_t;
52789Sahrens 
53789Sahrens /*
54789Sahrens  * Fault injection modes.
55789Sahrens  */
56789Sahrens #define	VDEV_FAULT_NONE		0
57789Sahrens #define	VDEV_FAULT_RANDOM	1
58789Sahrens #define	VDEV_FAULT_COUNT	2
59789Sahrens 
60789Sahrens extern int vdev_open(vdev_t *);
61*1986Seschrock extern int vdev_validate(vdev_t *);
62789Sahrens extern void vdev_close(vdev_t *);
63789Sahrens extern int vdev_create(vdev_t *, uint64_t txg);
641585Sbonwick extern void vdev_init(vdev_t *, uint64_t txg);
651544Seschrock extern void vdev_reopen(vdev_t *);
66789Sahrens 
67789Sahrens extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
68789Sahrens extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
69789Sahrens extern void vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size);
70789Sahrens extern int vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size);
71789Sahrens extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
72789Sahrens     int scrub_done);
73789Sahrens 
74789Sahrens extern const char *vdev_description(vdev_t *vd);
75789Sahrens 
761544Seschrock extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
77789Sahrens extern void vdev_metaslab_fini(vdev_t *vd);
78789Sahrens 
79789Sahrens extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
80789Sahrens extern void vdev_stat_update(zio_t *zio);
81789Sahrens extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type,
82789Sahrens     boolean_t complete);
83789Sahrens extern int vdev_getspec(spa_t *spa, uint64_t vdev, char **vdev_spec);
841775Sbillm extern void vdev_propagate_state(vdev_t *vd);
851544Seschrock extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
861544Seschrock     vdev_aux_t aux);
87789Sahrens 
88789Sahrens extern void vdev_space_update(vdev_t *vd, uint64_t space_delta,
89789Sahrens     uint64_t alloc_delta);
90789Sahrens 
91789Sahrens extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
92789Sahrens 
93789Sahrens extern void vdev_io_start(zio_t *zio);
94789Sahrens extern void vdev_io_done(zio_t *zio);
95789Sahrens 
961544Seschrock extern int vdev_online(spa_t *spa, uint64_t guid);
971544Seschrock extern int vdev_offline(spa_t *spa, uint64_t guid, int istmp);
981544Seschrock extern void vdev_clear(spa_t *spa, vdev_t *vd);
99789Sahrens 
100789Sahrens extern int vdev_error_inject(vdev_t *vd, zio_t *zio);
101789Sahrens extern int vdev_is_dead(vdev_t *vd);
102789Sahrens 
103789Sahrens extern void vdev_cache_init(vdev_t *vd);
104789Sahrens extern void vdev_cache_fini(vdev_t *vd);
105789Sahrens extern int vdev_cache_read(zio_t *zio);
106789Sahrens extern void vdev_cache_write(zio_t *zio);
107789Sahrens 
108789Sahrens extern void vdev_queue_init(vdev_t *vd);
109789Sahrens extern void vdev_queue_fini(vdev_t *vd);
110789Sahrens extern zio_t *vdev_queue_io(zio_t *zio);
111789Sahrens extern void vdev_queue_io_done(zio_t *zio);
112789Sahrens 
113789Sahrens extern vdev_knob_t *vdev_knob_next(vdev_knob_t *vk);
114789Sahrens 
115789Sahrens extern void vdev_config_dirty(vdev_t *vd);
116789Sahrens extern void vdev_config_clean(vdev_t *vd);
1171635Sbonwick extern int vdev_config_sync(vdev_t *vd, uint64_t txg);
118789Sahrens 
119789Sahrens extern nvlist_t *vdev_config_generate(vdev_t *vd, int getstats);
120789Sahrens 
121789Sahrens /*
122789Sahrens  * Label routines
123789Sahrens  */
124789Sahrens struct uberblock;
125789Sahrens extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
126789Sahrens extern nvlist_t *vdev_label_read_config(vdev_t *vd);
127789Sahrens extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub);
128789Sahrens int vdev_label_init(vdev_t *vd, uint64_t create_txg);
129789Sahrens 
130789Sahrens #ifdef	__cplusplus
131789Sahrens }
132789Sahrens #endif
133789Sahrens 
134789Sahrens #endif	/* _SYS_VDEV_H */
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