vdev.h revision 271238 
11556Srgrimes/*
21556Srgrimes * CDDL HEADER START
31556Srgrimes *
41556Srgrimes * The contents of this file are subject to the terms of the
51556Srgrimes * Common Development and Distribution License (the "License").
61556Srgrimes * You may not use this file except in compliance with the License.
71556Srgrimes *
81556Srgrimes * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
91556Srgrimes * or http://www.opensolaris.org/os/licensing.
101556Srgrimes * See the License for the specific language governing permissions
111556Srgrimes * and limitations under the License.
121556Srgrimes *
131556Srgrimes * When distributing Covered Code, include this CDDL HEADER in each
141556Srgrimes * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
151556Srgrimes * If applicable, add the following below this CDDL HEADER, with the
161556Srgrimes * fields enclosed by brackets "[]" replaced with your own identifying
171556Srgrimes * information: Portions Copyright [yyyy] [name of copyright owner]
181556Srgrimes *
191556Srgrimes * CDDL HEADER END
201556Srgrimes */
211556Srgrimes
221556Srgrimes/*
231556Srgrimes * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
241556Srgrimes * Copyright (c) 2013 by Delphix. All rights reserved.
251556Srgrimes */
261556Srgrimes
271556Srgrimes#ifndef _SYS_VDEV_H
281556Srgrimes#define	_SYS_VDEV_H
291556Srgrimes
301556Srgrimes#include <sys/spa.h>
311556Srgrimes#include <sys/zio.h>
3217987Speter#include <sys/dmu.h>
3350471Speter#include <sys/space_map.h>
341556Srgrimes#include <sys/fs/zfs.h>
351556Srgrimes
361556Srgrimes#ifdef	__cplusplus
3720425Ssteveextern "C" {
3820425Ssteve#endif
3920425Ssteve
401556Srgrimestypedef enum vdev_dtl_type {
4120425Ssteve	DTL_MISSING,	/* 0% replication: no copies of the data */
4220425Ssteve	DTL_PARTIAL,	/* less than 100% replication: some copies missing */
431556Srgrimes	DTL_SCRUB,	/* unable to fully repair during scrub/resilver */
441556Srgrimes	DTL_OUTAGE,	/* temporarily missing (used to attempt detach) */
451556Srgrimes	DTL_TYPES
461556Srgrimes} vdev_dtl_type_t;
471556Srgrimes
481556Srgrimesextern boolean_t zfs_nocacheflush;
491556Srgrimesextern boolean_t zfs_trim_enabled;
501556Srgrimes
511556Srgrimesextern int vdev_open(vdev_t *);
521556Srgrimesextern void vdev_open_children(vdev_t *);
531556Srgrimesextern boolean_t vdev_uses_zvols(vdev_t *);
541556Srgrimesextern int vdev_validate(vdev_t *, boolean_t);
551556Srgrimesextern void vdev_close(vdev_t *);
561556Srgrimesextern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
571556Srgrimesextern void vdev_reopen(vdev_t *);
581556Srgrimesextern int vdev_validate_aux(vdev_t *vd);
591556Srgrimesextern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
601556Srgrimes
611556Srgrimesextern boolean_t vdev_is_bootable(vdev_t *vd);
6219240Ssteveextern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
6345221Scracauerextern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
64100664Stjrextern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
651556Srgrimes    uint64_t txg, uint64_t size);
66100664Stjrextern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
671556Srgrimes    uint64_t txg, uint64_t size);
681556Srgrimesextern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
691556Srgrimesextern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
701556Srgrimes    int scrub_done);
711556Srgrimesextern boolean_t vdev_dtl_required(vdev_t *vd);
721556Srgrimesextern boolean_t vdev_resilver_needed(vdev_t *vd,
731556Srgrimes    uint64_t *minp, uint64_t *maxp);
741556Srgrimes
751556Srgrimesextern void vdev_hold(vdev_t *);
7617987Speterextern void vdev_rele(vdev_t *);
7717987Speter
7817987Speterextern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
7917987Speterextern void vdev_metaslab_fini(vdev_t *vd);
8017987Speterextern void vdev_metaslab_set_size(vdev_t *);
8117987Speterextern void vdev_ashift_optimize(vdev_t *);
8217987Speterextern void vdev_expand(vdev_t *vd, uint64_t txg);
8317987Speterextern void vdev_split(vdev_t *vd);
8417987Speterextern void vdev_deadman(vdev_t *vd);
8517987Speter
8617987Speter
8717987Speterextern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
8817987Speterextern void vdev_clear_stats(vdev_t *vd);
8917987Speterextern void vdev_stat_update(zio_t *zio, uint64_t psize);
9017987Speterextern void vdev_scan_stat_init(vdev_t *vd);
9119240Ssteveextern void vdev_propagate_state(vdev_t *vd);
9245221Scracauerextern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
93100664Stjr    vdev_aux_t aux);
941556Srgrimes
951556Srgrimesextern void vdev_space_update(vdev_t *vd,
961556Srgrimes    int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
971556Srgrimes
981556Srgrimesextern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
991556Srgrimes
1001556Srgrimesextern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
1011556Srgrimesextern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
1021556Srgrimesextern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
1031556Srgrimes    vdev_state_t *);
10459436Scracauerextern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
1051556Srgrimesextern void vdev_clear(spa_t *spa, vdev_t *vd);
1061556Srgrimes
10790111Simpextern boolean_t vdev_is_dead(vdev_t *vd);
10890111Simpextern boolean_t vdev_readable(vdev_t *vd);
10990111Simpextern boolean_t vdev_writeable(vdev_t *vd);
11090111Simpextern boolean_t vdev_allocatable(vdev_t *vd);
11190111Simpextern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
11290111Simp
11390111Simpextern void vdev_cache_init(vdev_t *vd);
114200956Sjillesextern void vdev_cache_fini(vdev_t *vd);
11590111Simpextern boolean_t vdev_cache_read(zio_t *zio);
116extern void vdev_cache_write(zio_t *zio);
117extern void vdev_cache_purge(vdev_t *vd);
118
119extern void vdev_queue_init(vdev_t *vd);
120extern void vdev_queue_fini(vdev_t *vd);
121extern zio_t *vdev_queue_io(zio_t *zio);
122extern void vdev_queue_io_done(zio_t *zio);
123extern int vdev_queue_length(vdev_t *vd);
124extern uint64_t vdev_queue_lastoffset(vdev_t *vd);
125extern void vdev_queue_register_lastoffset(vdev_t *vd, zio_t *zio);
126
127extern void vdev_config_dirty(vdev_t *vd);
128extern void vdev_config_clean(vdev_t *vd);
129extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg,
130    boolean_t);
131
132extern void vdev_state_dirty(vdev_t *vd);
133extern void vdev_state_clean(vdev_t *vd);
134
135typedef enum vdev_config_flag {
136	VDEV_CONFIG_SPARE = 1 << 0,
137	VDEV_CONFIG_L2CACHE = 1 << 1,
138	VDEV_CONFIG_REMOVING = 1 << 2
139} vdev_config_flag_t;
140
141extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
142extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
143    boolean_t getstats, vdev_config_flag_t flags);
144
145/*
146 * Label routines
147 */
148struct uberblock;
149extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
150extern int vdev_label_number(uint64_t psise, uint64_t offset);
151extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
152extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
153
154typedef enum {
155	VDEV_LABEL_CREATE,	/* create/add a new device */
156	VDEV_LABEL_REPLACE,	/* replace an existing device */
157	VDEV_LABEL_SPARE,	/* add a new hot spare */
158	VDEV_LABEL_REMOVE,	/* remove an existing device */
159	VDEV_LABEL_L2CACHE,	/* add an L2ARC cache device */
160	VDEV_LABEL_SPLIT	/* generating new label for split-off dev */
161} vdev_labeltype_t;
162
163extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
164
165#ifdef	__cplusplus
166}
167#endif
168
169#endif	/* _SYS_VDEV_H */
170