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 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2011, 2017 by Delphix. All rights reserved. 25 * Copyright (c) 2017, Intel Corporation. 26 */ 27 28 #ifndef _SYS_VDEV_H 29 #define _SYS_VDEV_H 30 31 #include <sys/spa.h> 32 #include <sys/zio.h> 33 #include <sys/dmu.h> 34 #include <sys/space_map.h> 35 #include <sys/fs/zfs.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 typedef enum vdev_dtl_type { 42 DTL_MISSING, /* 0% replication: no copies of the data */ 43 DTL_PARTIAL, /* less than 100% replication: some copies missing */ 44 DTL_SCRUB, /* unable to fully repair during scrub/resilver */ 45 DTL_OUTAGE, /* temporarily missing (used to attempt detach) */ 46 DTL_TYPES 47 } vdev_dtl_type_t; 48 49 extern boolean_t zfs_nocacheflush; 50 51 extern void vdev_dbgmsg(vdev_t *vd, const char *fmt, ...); 52 extern void vdev_dbgmsg_print_tree(vdev_t *, int); 53 extern int vdev_open(vdev_t *); 54 extern void vdev_open_children(vdev_t *); 55 extern boolean_t vdev_uses_zvols(vdev_t *); 56 extern int vdev_validate(vdev_t *); 57 extern int vdev_copy_path_strict(vdev_t *, vdev_t *); 58 extern void vdev_copy_path_relaxed(vdev_t *, vdev_t *); 59 extern void vdev_close(vdev_t *); 60 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace); 61 extern void vdev_reopen(vdev_t *); 62 extern int vdev_validate_aux(vdev_t *vd); 63 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio); 64 extern boolean_t vdev_is_concrete(vdev_t *vd); 65 extern boolean_t vdev_is_bootable(vdev_t *vd); 66 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev); 67 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid); 68 extern int vdev_count_leaves(spa_t *spa); 69 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d, 70 uint64_t txg, uint64_t size); 71 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d, 72 uint64_t txg, uint64_t size); 73 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d); 74 extern boolean_t vdev_dtl_need_resilver(vdev_t *vd, uint64_t off, size_t size); 75 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, 76 int scrub_done); 77 extern boolean_t vdev_dtl_required(vdev_t *vd); 78 extern boolean_t vdev_resilver_needed(vdev_t *vd, 79 uint64_t *minp, uint64_t *maxp); 80 extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj, 81 dmu_tx_t *tx); 82 extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx); 83 extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx); 84 extern void vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx); 85 extern void vdev_indirect_mark_obsolete(vdev_t *vd, uint64_t offset, 86 uint64_t size); 87 extern void spa_vdev_indirect_mark_obsolete(spa_t *spa, uint64_t vdev, 88 uint64_t offset, uint64_t size, dmu_tx_t *tx); 89 90 extern void vdev_hold(vdev_t *); 91 extern void vdev_rele(vdev_t *); 92 93 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg); 94 extern void vdev_metaslab_fini(vdev_t *vd); 95 extern void vdev_metaslab_set_size(vdev_t *); 96 extern void vdev_expand(vdev_t *vd, uint64_t txg); 97 extern void vdev_split(vdev_t *vd); 98 extern void vdev_deadman(vdev_t *vd); 99 100 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 101 extern void vdev_clear_stats(vdev_t *vd); 102 extern void vdev_stat_update(zio_t *zio, uint64_t psize); 103 extern void vdev_scan_stat_init(vdev_t *vd); 104 extern void vdev_propagate_state(vdev_t *vd); 105 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, 106 vdev_aux_t aux); 107 extern boolean_t vdev_children_are_offline(vdev_t *vd); 108 109 extern void vdev_space_update(vdev_t *vd, 110 int64_t alloc_delta, int64_t defer_delta, int64_t space_delta); 111 112 extern int64_t vdev_deflated_space(vdev_t *vd, int64_t space); 113 114 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize); 115 116 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux); 117 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux); 118 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, 119 vdev_state_t *); 120 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags); 121 extern void vdev_clear(spa_t *spa, vdev_t *vd); 122 123 extern boolean_t vdev_is_dead(vdev_t *vd); 124 extern boolean_t vdev_readable(vdev_t *vd); 125 extern boolean_t vdev_writeable(vdev_t *vd); 126 extern boolean_t vdev_allocatable(vdev_t *vd); 127 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio); 128 extern boolean_t vdev_is_spacemap_addressable(vdev_t *vd); 129 130 extern void vdev_cache_init(vdev_t *vd); 131 extern void vdev_cache_fini(vdev_t *vd); 132 extern boolean_t vdev_cache_read(zio_t *zio); 133 extern void vdev_cache_write(zio_t *zio); 134 extern void vdev_cache_purge(vdev_t *vd); 135 136 extern void vdev_queue_init(vdev_t *vd); 137 extern void vdev_queue_fini(vdev_t *vd); 138 extern zio_t *vdev_queue_io(zio_t *zio); 139 extern void vdev_queue_io_done(zio_t *zio); 140 extern void vdev_queue_change_io_priority(zio_t *zio, zio_priority_t priority); 141 142 extern int vdev_queue_length(vdev_t *vd); 143 extern uint64_t vdev_queue_last_offset(vdev_t *vd); 144 145 extern void vdev_config_dirty(vdev_t *vd); 146 extern void vdev_config_clean(vdev_t *vd); 147 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg); 148 149 extern void vdev_state_dirty(vdev_t *vd); 150 extern void vdev_state_clean(vdev_t *vd); 151 152 extern void vdev_set_deferred_resilver(spa_t *spa, vdev_t *vd); 153 154 typedef enum vdev_config_flag { 155 VDEV_CONFIG_SPARE = 1 << 0, 156 VDEV_CONFIG_L2CACHE = 1 << 1, 157 VDEV_CONFIG_REMOVING = 1 << 2, 158 VDEV_CONFIG_MOS = 1 << 3, 159 VDEV_CONFIG_MISSING = 1 << 4 160 } vdev_config_flag_t; 161 162 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config); 163 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd, 164 boolean_t getstats, vdev_config_flag_t flags); 165 166 /* 167 * Label routines 168 */ 169 struct uberblock; 170 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 171 extern int vdev_label_number(uint64_t psise, uint64_t offset); 172 extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg); 173 extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **); 174 extern void vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t 175 offset, uint64_t size, zio_done_func_t *done, void *private, int flags); 176 177 typedef enum { 178 VDEV_LABEL_CREATE, /* create/add a new device */ 179 VDEV_LABEL_REPLACE, /* replace an existing device */ 180 VDEV_LABEL_SPARE, /* add a new hot spare */ 181 VDEV_LABEL_REMOVE, /* remove an existing device */ 182 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */ 183 VDEV_LABEL_SPLIT /* generating new label for split-off dev */ 184 } vdev_labeltype_t; 185 186 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason); 187 188 #ifdef __cplusplus 189 } 190 #endif 191 192 #endif /* _SYS_VDEV_H */ 193