usr/src/uts/common/fs/zfs/sys/vdev.h

   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  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_VDEV_H
  27 #define _SYS_VDEV_H
  28
  29 #include <sys/spa.h>
  30 #include <sys/zio.h>
  31 #include <sys/dmu.h>
  32 #include <sys/space_map.h>
  33 #include <sys/fs/zfs.h>
  34
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 typedef enum vdev_dtl_type {
  40         DTL_MISSING,    /* 0% replication: no copies of the data */
  41         DTL_PARTIAL,    /* less than 100% replication: some copies missing */
  42         DTL_SCRUB,      /* unable to fully repair during scrub/resilver */
  43         DTL_OUTAGE,     /* temporarily missing (used to attempt detach) */
  44         DTL_TYPES
  45 } vdev_dtl_type_t;
  46
  47 extern boolean_t zfs_nocacheflush;
  48
  49 extern int vdev_open(vdev_t *);
  50 extern void vdev_open_children(vdev_t *);
  51 extern boolean_t vdev_uses_zvols(vdev_t *);
  52 extern int vdev_validate(vdev_t *);
  53 extern void vdev_close(vdev_t *);
  54 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
  55 extern void vdev_reopen(vdev_t *);
  56 extern int vdev_validate_aux(vdev_t *vd);
  57 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
  58
  59 extern boolean_t vdev_is_bootable(vdev_t *vd);
  60 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
  61 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
  62 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
  63     uint64_t txg, uint64_t size);
  64 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
  65     uint64_t txg, uint64_t size);
  66 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
  67 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
  68     int scrub_done);
  69 extern boolean_t vdev_dtl_required(vdev_t *vd);
  70 extern boolean_t vdev_resilver_needed(vdev_t *vd,
  71     uint64_t *minp, uint64_t *maxp);
  72
  73 extern void vdev_hold(vdev_t *);
  74 extern void vdev_rele(vdev_t *);
  75
  76 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
  77 extern void vdev_metaslab_fini(vdev_t *vd);
  78 extern void vdev_metaslab_set_size(vdev_t *);
  79 extern void vdev_expand(vdev_t *vd, uint64_t txg);
  80 extern void vdev_split(vdev_t *vd);
  81
  82
  83 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
  84 extern void vdev_clear_stats(vdev_t *vd);
  85 extern void vdev_stat_update(zio_t *zio, uint64_t psize);
  86 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type,
  87     boolean_t complete);
  88 extern void vdev_propagate_state(vdev_t *vd);
  89 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
  90     vdev_aux_t aux);
  91
  92 extern void vdev_space_update(vdev_t *vd,
  93     int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
  94
  95 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
  96
  97 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
  98 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
  99 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
 100     vdev_state_t *);
 101 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
 102 extern void vdev_clear(spa_t *spa, vdev_t *vd);
 103
 104 extern boolean_t vdev_is_dead(vdev_t *vd);
 105 extern boolean_t vdev_readable(vdev_t *vd);
 106 extern boolean_t vdev_writeable(vdev_t *vd);
 107 extern boolean_t vdev_allocatable(vdev_t *vd);
 108 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
 109
 110 extern void vdev_cache_init(vdev_t *vd);
 111 extern void vdev_cache_fini(vdev_t *vd);
 112 extern int vdev_cache_read(zio_t *zio);
 113 extern void vdev_cache_write(zio_t *zio);
 114 extern void vdev_cache_purge(vdev_t *vd);
 115
 116 extern void vdev_queue_init(vdev_t *vd);
 117 extern void vdev_queue_fini(vdev_t *vd);
 118 extern zio_t *vdev_queue_io(zio_t *zio);
 119 extern void vdev_queue_io_done(zio_t *zio);
 120
 121 extern void vdev_config_dirty(vdev_t *vd);
 122 extern void vdev_config_clean(vdev_t *vd);
 123 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg,
 124     boolean_t);
 125
 126 extern void vdev_state_dirty(vdev_t *vd);
 127 extern void vdev_state_clean(vdev_t *vd);
 128
 129 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
 130 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
 131     boolean_t getstats, boolean_t isspare, boolean_t isl2cache);
 132
 133 /*
 134  * Label routines
 135  */
 136 struct uberblock;
 137 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
 138 extern int vdev_label_number(uint64_t psise, uint64_t offset);
 139 extern nvlist_t *vdev_label_read_config(vdev_t *vd);
 140 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub);
 141
 142 typedef enum {
 143         VDEV_LABEL_CREATE,      /* create/add a new device */
 144         VDEV_LABEL_REPLACE,     /* replace an existing device */
 145         VDEV_LABEL_SPARE,       /* add a new hot spare */
 146         VDEV_LABEL_REMOVE,      /* remove an existing device */
 147         VDEV_LABEL_L2CACHE,     /* add an L2ARC cache device */
 148         VDEV_LABEL_SPLIT        /* generating new label for split-off dev */
 149 } vdev_labeltype_t;
 150
 151 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
 152
 153 #ifdef  __cplusplus
 154 }
 155 #endif
 156
 157 #endif  /* _SYS_VDEV_H */