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_cache_init(vdev_t *vd); 162 extern void vdev_cache_fini(vdev_t *vd); 163 extern boolean_t vdev_cache_read(zio_t *zio); 164 extern void vdev_cache_write(zio_t *zio); 165 extern void vdev_cache_purge(vdev_t *vd); 166 167 extern void vdev_queue_init(vdev_t *vd); 168 extern void vdev_queue_fini(vdev_t *vd); 169 extern zio_t *vdev_queue_io(zio_t *zio); 170 extern void vdev_queue_io_done(zio_t *zio); 171 extern void vdev_queue_change_io_priority(zio_t *zio, zio_priority_t priority); 172 173 extern int vdev_queue_length(vdev_t *vd); 174 extern uint64_t vdev_queue_last_offset(vdev_t *vd); 175 176 extern void vdev_config_dirty(vdev_t *vd); 177 extern void vdev_config_clean(vdev_t *vd); 178 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg); 179 180 extern void vdev_state_dirty(vdev_t *vd); 181 extern void vdev_state_clean(vdev_t *vd); 182 183 extern void vdev_defer_resilver(vdev_t *vd); 184 extern boolean_t vdev_clear_resilver_deferred(vdev_t *vd, dmu_tx_t *tx); 185 186 typedef enum vdev_config_flag { 187 VDEV_CONFIG_SPARE = 1 << 0, 188 VDEV_CONFIG_L2CACHE = 1 << 1, 189 VDEV_CONFIG_REMOVING = 1 << 2, 190 VDEV_CONFIG_MOS = 1 << 3, 191 VDEV_CONFIG_MISSING = 1 << 4 192 } vdev_config_flag_t; 193 194 extern void vdev_post_kobj_evt(vdev_t *vd); 195 extern void vdev_clear_kobj_evt(vdev_t *vd); 196 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config); 197 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd, 198 boolean_t getstats, vdev_config_flag_t flags); 199 200 /* 201 * Label routines 202 */ 203 struct uberblock; 204 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 205 extern int vdev_label_number(uint64_t psise, uint64_t offset); 206 extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg); 207 extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **); 208 extern void vdev_config_generate_stats(vdev_t *vd, nvlist_t *nv); 209 extern void vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t 210 offset, uint64_t size, zio_done_func_t *done, void *priv, int flags); 211 extern int vdev_label_read_bootenv(vdev_t *, nvlist_t *); 212 extern int vdev_label_write_bootenv(vdev_t *, nvlist_t *); 213 214 typedef enum { 215 VDEV_LABEL_CREATE, /* create/add a new device */ 216 VDEV_LABEL_REPLACE, /* replace an existing device */ 217 VDEV_LABEL_SPARE, /* add a new hot spare */ 218 VDEV_LABEL_REMOVE, /* remove an existing device */ 219 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */ 220 VDEV_LABEL_SPLIT /* generating new label for split-off dev */ 221 } vdev_labeltype_t; 222 223 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason); 224 225 extern int vdev_prop_set(vdev_t *vd, nvlist_t *innvl, nvlist_t *outnvl); 226 extern int vdev_prop_get(vdev_t *vd, nvlist_t *nvprops, nvlist_t *outnvl); 227 228 #ifdef __cplusplus 229 } 230 #endif 231 232 #endif /* _SYS_VDEV_H */ 233