xref: /onnv-gate/usr/src/uts/common/fs/zfs/sys/vdev.h (revision 2986)
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 
41*2986Sek110237 extern boolean_t zfs_nocacheflush;
42*2986Sek110237 
43789Sahrens /*
44789Sahrens  * Vdev knobs.
45789Sahrens  */
46789Sahrens typedef struct vdev_knob {
47789Sahrens 	char		*vk_name;		/* knob name		*/
48789Sahrens 	char		*vk_desc;		/* knob description	*/
49789Sahrens 	uint64_t	vk_min;			/* minimum legal value	*/
50789Sahrens 	uint64_t	vk_max;			/* maximum legal value	*/
51789Sahrens 	uint64_t	vk_default;		/* default value	*/
52789Sahrens 	size_t		vk_offset;		/* offset into vdev_t	*/
53789Sahrens } vdev_knob_t;
54789Sahrens 
55789Sahrens /*
56789Sahrens  * Fault injection modes.
57789Sahrens  */
58789Sahrens #define	VDEV_FAULT_NONE		0
59789Sahrens #define	VDEV_FAULT_RANDOM	1
60789Sahrens #define	VDEV_FAULT_COUNT	2
61789Sahrens 
62789Sahrens extern int vdev_open(vdev_t *);
631986Seschrock extern int vdev_validate(vdev_t *);
64789Sahrens extern void vdev_close(vdev_t *);
652082Seschrock extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
661585Sbonwick extern void vdev_init(vdev_t *, uint64_t txg);
671544Seschrock extern void vdev_reopen(vdev_t *);
682082Seschrock extern int vdev_validate_spare(vdev_t *);
69789Sahrens 
70789Sahrens extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
71789Sahrens extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
72789Sahrens extern void vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size);
73789Sahrens extern int vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size);
74789Sahrens extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
75789Sahrens     int scrub_done);
76789Sahrens 
77789Sahrens extern const char *vdev_description(vdev_t *vd);
78789Sahrens 
791544Seschrock extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
80789Sahrens extern void vdev_metaslab_fini(vdev_t *vd);
81789Sahrens 
82789Sahrens extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
83789Sahrens extern void vdev_stat_update(zio_t *zio);
84789Sahrens extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type,
85789Sahrens     boolean_t complete);
86789Sahrens extern int vdev_getspec(spa_t *spa, uint64_t vdev, char **vdev_spec);
871775Sbillm extern void vdev_propagate_state(vdev_t *vd);
881544Seschrock extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
891544Seschrock     vdev_aux_t aux);
90789Sahrens 
912082Seschrock extern void vdev_space_update(vdev_t *vd, int64_t space_delta,
922082Seschrock     int64_t alloc_delta);
93789Sahrens 
94789Sahrens extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
95789Sahrens 
96789Sahrens extern void vdev_io_start(zio_t *zio);
97789Sahrens extern void vdev_io_done(zio_t *zio);
98789Sahrens 
991544Seschrock extern int vdev_online(spa_t *spa, uint64_t guid);
1001544Seschrock extern int vdev_offline(spa_t *spa, uint64_t guid, int istmp);
1011544Seschrock extern void vdev_clear(spa_t *spa, vdev_t *vd);
102789Sahrens 
103789Sahrens extern int vdev_error_inject(vdev_t *vd, zio_t *zio);
104789Sahrens extern int vdev_is_dead(vdev_t *vd);
105789Sahrens 
106789Sahrens extern void vdev_cache_init(vdev_t *vd);
107789Sahrens extern void vdev_cache_fini(vdev_t *vd);
108789Sahrens extern int vdev_cache_read(zio_t *zio);
109789Sahrens extern void vdev_cache_write(zio_t *zio);
110789Sahrens 
111789Sahrens extern void vdev_queue_init(vdev_t *vd);
112789Sahrens extern void vdev_queue_fini(vdev_t *vd);
113789Sahrens extern zio_t *vdev_queue_io(zio_t *zio);
114789Sahrens extern void vdev_queue_io_done(zio_t *zio);
115789Sahrens 
116789Sahrens extern vdev_knob_t *vdev_knob_next(vdev_knob_t *vk);
117789Sahrens 
118789Sahrens extern void vdev_config_dirty(vdev_t *vd);
119789Sahrens extern void vdev_config_clean(vdev_t *vd);
1201635Sbonwick extern int vdev_config_sync(vdev_t *vd, uint64_t txg);
121789Sahrens 
1222082Seschrock extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
1232082Seschrock     boolean_t getstats, boolean_t isspare);
124789Sahrens 
125789Sahrens /*
126789Sahrens  * Label routines
127789Sahrens  */
128789Sahrens struct uberblock;
129789Sahrens extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
130789Sahrens extern nvlist_t *vdev_label_read_config(vdev_t *vd);
131789Sahrens extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub);
1322082Seschrock int vdev_label_init(vdev_t *vd, uint64_t create_txg, boolean_t isreplacing);
1332082Seschrock int vdev_label_spare(vdev_t *vd, uint64_t create_txg);
134789Sahrens 
135789Sahrens #ifdef	__cplusplus
136789Sahrens }
137789Sahrens #endif
138789Sahrens 
139789Sahrens #endif	/* _SYS_VDEV_H */
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