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 https://opensource.org/licenses/CDDL-1.0.
  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 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright (c) 2011, 2020 by Delphix. All rights reserved.
  25  * Copyright (c) 2017, Intel Corporation.
  26  * Copyright (c) 2019, Datto Inc. All rights reserved.
  27  */
  28
  29 #ifndef _SYS_VDEV_H
  30 #define _SYS_VDEV_H
  31
  32 #include <sys/spa.h>
  33 #include <sys/zio.h>
  34 #include <sys/dmu.h>
  35 #include <sys/space_map.h>
  36 #include <sys/metaslab.h>
  37 #include <sys/fs/zfs.h>
  38
  39 #ifdef  __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 typedef enum vdev_dtl_type {
  44         DTL_MISSING,    /* 0% replication: no copies of the data */
  45         DTL_PARTIAL,    /* less than 100% replication: some copies missing */
  46         DTL_SCRUB,      /* unable to fully repair during scrub/resilver */
  47         DTL_OUTAGE,     /* temporarily missing (used to attempt detach) */
  48         DTL_TYPES
  49 } vdev_dtl_type_t;
  50
  51 extern int zfs_nocacheflush;
  52
  53 typedef boolean_t vdev_open_children_func_t(vdev_t *vd);
  54
  55 extern void vdev_dbgmsg(vdev_t *vd, const char *fmt, ...)
  56     __attribute__((format(printf, 2, 3)));
  57 extern void vdev_dbgmsg_print_tree(vdev_t *, int);
  58 extern int vdev_open(vdev_t *);
  59 extern void vdev_open_children(vdev_t *);
  60 extern void vdev_open_children_subset(vdev_t *, vdev_open_children_func_t *);
  61 extern int vdev_validate(vdev_t *);
  62 extern int vdev_copy_path_strict(vdev_t *, vdev_t *);
  63 extern void vdev_copy_path_relaxed(vdev_t *, vdev_t *);
  64 extern void vdev_close(vdev_t *);
  65 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
  66 extern void vdev_reopen(vdev_t *);
  67 extern int vdev_validate_aux(vdev_t *vd);
  68 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
  69 extern boolean_t vdev_is_concrete(vdev_t *vd);
  70 extern boolean_t vdev_is_bootable(vdev_t *vd);
  71 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
  72 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
  73 extern int vdev_count_leaves(spa_t *spa);
  74 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
  75     uint64_t txg, uint64_t size);
  76 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
  77     uint64_t txg, uint64_t size);
  78 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
  79 extern boolean_t vdev_default_need_resilver(vdev_t *vd, const dva_t *dva,
  80     size_t psize, uint64_t phys_birth);
  81 extern boolean_t vdev_dtl_need_resilver(vdev_t *vd, const dva_t *dva,
  82     size_t psize, uint64_t phys_birth);
  83 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
  84     boolean_t scrub_done, boolean_t rebuild_done);
  85 extern boolean_t vdev_dtl_required(vdev_t *vd);
  86 extern boolean_t vdev_resilver_needed(vdev_t *vd,
  87     uint64_t *minp, uint64_t *maxp);
  88 extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj,
  89     dmu_tx_t *tx);
  90 extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx);
  91 extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx);
  92 extern void vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx);
  93 extern void vdev_indirect_mark_obsolete(vdev_t *vd, uint64_t offset,
  94     uint64_t size);
  95 extern void spa_vdev_indirect_mark_obsolete(spa_t *spa, uint64_t vdev,
  96     uint64_t offset, uint64_t size, dmu_tx_t *tx);
  97 extern boolean_t vdev_replace_in_progress(vdev_t *vdev);
  98
  99 extern void vdev_hold(vdev_t *);
 100 extern void vdev_rele(vdev_t *);
 101
 102 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
 103 extern void vdev_metaslab_fini(vdev_t *vd);
 104 extern void vdev_metaslab_set_size(vdev_t *);
 105 extern void vdev_expand(vdev_t *vd, uint64_t txg);
 106 extern void vdev_split(vdev_t *vd);
 107 extern void vdev_deadman(vdev_t *vd, const char *tag);
 108
 109 typedef void vdev_xlate_func_t(void *arg, range_seg64_t *physical_rs);
 110
 111 extern boolean_t vdev_xlate_is_empty(range_seg64_t *rs);
 112 extern void vdev_xlate(vdev_t *vd, const range_seg64_t *logical_rs,
 113     range_seg64_t *physical_rs, range_seg64_t *remain_rs);
 114 extern void vdev_xlate_walk(vdev_t *vd, const range_seg64_t *logical_rs,
 115     vdev_xlate_func_t *func, void *arg);
 116
 117 extern void vdev_get_stats_ex(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx);
 118
 119 extern metaslab_group_t *vdev_get_mg(vdev_t *vd, metaslab_class_t *mc);
 120
 121 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
 122 extern void vdev_clear_stats(vdev_t *vd);
 123 extern void vdev_stat_update(zio_t *zio, uint64_t psize);
 124 extern void vdev_scan_stat_init(vdev_t *vd);
 125 extern void vdev_propagate_state(vdev_t *vd);
 126 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
 127     vdev_aux_t aux);
 128 extern boolean_t vdev_children_are_offline(vdev_t *vd);
 129
 130 extern void vdev_space_update(vdev_t *vd,
 131     int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
 132
 133 extern int64_t vdev_deflated_space(vdev_t *vd, int64_t space);
 134
 135 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
 136
 137 /*
 138  * Return the amount of space allocated for a gang block header.
 139  */
 140 static inline uint64_t
 141 vdev_gang_header_asize(vdev_t *vd)
 142 {
 143         return (vdev_psize_to_asize(vd, SPA_GANGBLOCKSIZE));
 144 }
 145
 146 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
 147 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
 148 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
 149     vdev_state_t *);
 150 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
 151 extern int vdev_remove_wanted(spa_t *spa, uint64_t guid);
 152 extern void vdev_clear(spa_t *spa, vdev_t *vd);
 153
 154 extern boolean_t vdev_is_dead(vdev_t *vd);
 155 extern boolean_t vdev_readable(vdev_t *vd);
 156 extern boolean_t vdev_writeable(vdev_t *vd);
 157 extern boolean_t vdev_allocatable(vdev_t *vd);
 158 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
 159 extern boolean_t vdev_is_spacemap_addressable(vdev_t *vd);
 160
 161 extern void vdev_queue_init(vdev_t *vd);
 162 extern void vdev_queue_fini(vdev_t *vd);
 163 extern zio_t *vdev_queue_io(zio_t *zio);
 164 extern void vdev_queue_io_done(zio_t *zio);
 165 extern void vdev_queue_change_io_priority(zio_t *zio, zio_priority_t priority);
 166
 167 extern uint32_t vdev_queue_length(vdev_t *vd);
 168 extern uint64_t vdev_queue_last_offset(vdev_t *vd);
 169 extern uint64_t vdev_queue_class_length(vdev_t *vq, zio_priority_t p);
 170
 171 extern void vdev_config_dirty(vdev_t *vd);
 172 extern void vdev_config_clean(vdev_t *vd);
 173 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg);
 174
 175 extern void vdev_state_dirty(vdev_t *vd);
 176 extern void vdev_state_clean(vdev_t *vd);
 177
 178 extern void vdev_defer_resilver(vdev_t *vd);
 179 extern boolean_t vdev_clear_resilver_deferred(vdev_t *vd, dmu_tx_t *tx);
 180
 181 typedef enum vdev_config_flag {
 182         VDEV_CONFIG_SPARE = 1 << 0,
 183         VDEV_CONFIG_L2CACHE = 1 << 1,
 184         VDEV_CONFIG_MOS = 1 << 2,
 185         VDEV_CONFIG_MISSING = 1 << 3
 186 } vdev_config_flag_t;
 187
 188 extern void vdev_post_kobj_evt(vdev_t *vd);
 189 extern void vdev_clear_kobj_evt(vdev_t *vd);
 190 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
 191 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
 192     boolean_t getstats, vdev_config_flag_t flags);
 193
 194 /*
 195  * Label routines
 196  */
 197 struct uberblock;
 198 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
 199 extern int vdev_label_number(uint64_t psise, uint64_t offset);
 200 extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
 201 extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
 202 extern void vdev_config_generate_stats(vdev_t *vd, nvlist_t *nv);
 203 extern void vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t
 204     offset, uint64_t size, zio_done_func_t *done, void *priv, int flags);
 205 extern int vdev_label_read_bootenv(vdev_t *, nvlist_t *);
 206 extern int vdev_label_write_bootenv(vdev_t *, nvlist_t *);
 207
 208 typedef enum {
 209         VDEV_LABEL_CREATE,      /* create/add a new device */
 210         VDEV_LABEL_REPLACE,     /* replace an existing device */
 211         VDEV_LABEL_SPARE,       /* add a new hot spare */
 212         VDEV_LABEL_REMOVE,      /* remove an existing device */
 213         VDEV_LABEL_L2CACHE,     /* add an L2ARC cache device */
 214         VDEV_LABEL_SPLIT        /* generating new label for split-off dev */
 215 } vdev_labeltype_t;
 216
 217 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
 218
 219 extern int vdev_prop_set(vdev_t *vd, nvlist_t *innvl, nvlist_t *outnvl);
 220 extern int vdev_prop_get(vdev_t *vd, nvlist_t *nvprops, nvlist_t *outnvl);
 221
 222 #ifdef  __cplusplus
 223 }
 224 #endif
 225
 226 #endif  /* _SYS_VDEV_H */