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) 2012 by Delphix. All rights reserved. 25 */ 26 27 #ifndef _SYS_VDEV_H 28 #define _SYS_VDEV_H 29 30 #include <sys/spa.h> 31 #include <sys/zio.h> 32 #include <sys/dmu.h> 33 #include <sys/space_map.h> 34 #include <sys/fs/zfs.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 typedef enum vdev_dtl_type { 41 DTL_MISSING, /* 0% replication: no copies of the data */ 42 DTL_PARTIAL, /* less than 100% replication: some copies missing */ 43 DTL_SCRUB, /* unable to fully repair during scrub/resilver */ 44 DTL_OUTAGE, /* temporarily missing (used to attempt detach) */ 45 DTL_TYPES 46 } vdev_dtl_type_t; 47 48 extern boolean_t zfs_nocacheflush; 49 50 extern int vdev_open(vdev_t *); 51 extern void vdev_open_children(vdev_t *); 52 extern boolean_t vdev_uses_zvols(vdev_t *); 53 extern int vdev_validate(vdev_t *, boolean_t); 54 extern void vdev_close(vdev_t *); 55 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace); 56 extern void vdev_reopen(vdev_t *); 57 extern int vdev_validate_aux(vdev_t *vd); 58 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio); 59 60 extern boolean_t vdev_is_bootable(vdev_t *vd); 61 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev); 62 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid); 63 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d, 64 uint64_t txg, uint64_t size); 65 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d, 66 uint64_t txg, uint64_t size); 67 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d); 68 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, 69 int scrub_done); 70 extern boolean_t vdev_dtl_required(vdev_t *vd); 71 extern boolean_t vdev_resilver_needed(vdev_t *vd, 72 uint64_t *minp, uint64_t *maxp); 73 74 extern void vdev_hold(vdev_t *); 75 extern void vdev_rele(vdev_t *); 76 77 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg); 78 extern void vdev_metaslab_fini(vdev_t *vd); 79 extern void vdev_metaslab_set_size(vdev_t *); 80 extern void vdev_expand(vdev_t *vd, uint64_t txg); 81 extern void vdev_split(vdev_t *vd); 82 83 84 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 85 extern void vdev_clear_stats(vdev_t *vd); 86 extern void vdev_stat_update(zio_t *zio, uint64_t psize); 87 extern void vdev_scan_stat_init(vdev_t *vd); 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 typedef enum vdev_config_flag { 130 VDEV_CONFIG_SPARE = 1 << 0, 131 VDEV_CONFIG_L2CACHE = 1 << 1, 132 VDEV_CONFIG_REMOVING = 1 << 2 133 } vdev_config_flag_t; 134 135 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config); 136 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd, 137 boolean_t getstats, vdev_config_flag_t flags); 138 139 /* 140 * Label routines 141 */ 142 struct uberblock; 143 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 144 extern int vdev_label_number(uint64_t psise, uint64_t offset); 145 extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg); 146 extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **); 147 148 typedef enum { 149 VDEV_LABEL_CREATE, /* create/add a new device */ 150 VDEV_LABEL_REPLACE, /* replace an existing device */ 151 VDEV_LABEL_SPARE, /* add a new hot spare */ 152 VDEV_LABEL_REMOVE, /* remove an existing device */ 153 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */ 154 VDEV_LABEL_SPLIT /* generating new label for split-off dev */ 155 } vdev_labeltype_t; 156 157 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason); 158 159 #ifdef __cplusplus 160 } 161 #endif 162 163 #endif /* _SYS_VDEV_H */ 164