zfs/lib/libzpool/include/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 2008 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 extern boolean_t zfs_nocacheflush;
  40
  41 extern int vdev_open(vdev_t *);
  42 extern int vdev_validate(vdev_t *);
  43 extern void vdev_close(vdev_t *);
  44 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
  45 extern void vdev_init(vdev_t *, uint64_t txg);
  46 extern void vdev_reopen(vdev_t *);
  47 extern int vdev_validate_aux(vdev_t *vd);
  48 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
  49
  50 extern boolean_t vdev_is_bootable(vdev_t *vd);
  51 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
  52 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
  53 extern void vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size);
  54 extern int vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size);
  55 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
  56     int scrub_done);
  57 extern boolean_t vdev_resilver_needed(vdev_t *vd,
  58     uint64_t *minp, uint64_t *maxp);
  59
  60 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
  61 extern void vdev_metaslab_fini(vdev_t *vd);
  62
  63 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
  64 extern void vdev_clear_stats(vdev_t *vd);
  65 extern void vdev_stat_update(zio_t *zio, uint64_t psize);
  66 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type,
  67     boolean_t complete);
  68 extern int vdev_getspec(spa_t *spa, uint64_t vdev, char **vdev_spec);
  69 extern void vdev_propagate_state(vdev_t *vd);
  70 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
  71     vdev_aux_t aux);
  72
  73 extern void vdev_space_update(vdev_t *vd, int64_t space_delta,
  74     int64_t alloc_delta, boolean_t update_root);
  75
  76 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
  77
  78 extern int vdev_fault(spa_t *spa, uint64_t guid);
  79 extern int vdev_degrade(spa_t *spa, uint64_t guid);
  80 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
  81     vdev_state_t *);
  82 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
  83 extern void vdev_clear(spa_t *spa, vdev_t *vd);
  84
  85 extern boolean_t vdev_is_dead(vdev_t *vd);
  86 extern boolean_t vdev_readable(vdev_t *vd);
  87 extern boolean_t vdev_writeable(vdev_t *vd);
  88 extern boolean_t vdev_allocatable(vdev_t *vd);
  89 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
  90
  91 extern void vdev_cache_init(vdev_t *vd);
  92 extern void vdev_cache_fini(vdev_t *vd);
  93 extern int vdev_cache_read(zio_t *zio);
  94 extern void vdev_cache_write(zio_t *zio);
  95 extern void vdev_cache_purge(vdev_t *vd);
  96
  97 extern void vdev_queue_init(vdev_t *vd);
  98 extern void vdev_queue_fini(vdev_t *vd);
  99 extern zio_t *vdev_queue_io(zio_t *zio);
 100 extern void vdev_queue_io_done(zio_t *zio);
 101
 102 extern void vdev_config_dirty(vdev_t *vd);
 103 extern void vdev_config_clean(vdev_t *vd);
 104 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
 105
 106 extern void vdev_state_dirty(vdev_t *vd);
 107 extern void vdev_state_clean(vdev_t *vd);
 108
 109 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
 110     boolean_t getstats, boolean_t isspare, boolean_t isl2cache);
 111
 112 /*
 113  * Label routines
 114  */
 115 struct uberblock;
 116 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
 117 extern int vdev_label_number(uint64_t psise, uint64_t offset);
 118 extern nvlist_t *vdev_label_read_config(vdev_t *vd);
 119 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub);
 120
 121 typedef enum {
 122         VDEV_LABEL_CREATE,      /* create/add a new device */
 123         VDEV_LABEL_REPLACE,     /* replace an existing device */
 124         VDEV_LABEL_SPARE,       /* add a new hot spare */
 125         VDEV_LABEL_REMOVE,      /* remove an existing device */
 126         VDEV_LABEL_L2CACHE      /* add an L2ARC cache device */
 127 } vdev_labeltype_t;
 128
 129 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
 130
 131 #ifdef  __cplusplus
 132 }
 133 #endif
 134
 135 #endif  /* _SYS_VDEV_H */