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 2010 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 typedef enum vdev_dtl_type { 40 DTL_MISSING, /* 0% replication: no copies of the data */ 41 DTL_PARTIAL, /* less than 100% replication: some copies missing */ 42 DTL_SCRUB, /* unable to fully repair during scrub/resilver */ 43 DTL_OUTAGE, /* temporarily missing (used to attempt detach) */ 44 DTL_TYPES 45 } vdev_dtl_type_t; 46 47 extern boolean_t zfs_nocacheflush; 48 49 extern int vdev_open(vdev_t *); 50 extern void vdev_open_children(vdev_t *); 51 extern boolean_t vdev_uses_zvols(vdev_t *); 52 extern int vdev_validate(vdev_t *); 53 extern void vdev_close(vdev_t *); 54 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace); 55 extern void vdev_reopen(vdev_t *); 56 extern int vdev_validate_aux(vdev_t *vd); 57 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio); 58 59 extern boolean_t vdev_is_bootable(vdev_t *vd); 60 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev); 61 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid); 62 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d, 63 uint64_t txg, uint64_t size); 64 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d, 65 uint64_t txg, uint64_t size); 66 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d); 67 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, 68 int scrub_done); 69 extern boolean_t vdev_dtl_required(vdev_t *vd); 70 extern boolean_t vdev_resilver_needed(vdev_t *vd, 71 uint64_t *minp, uint64_t *maxp); 72 73 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg); 74 extern void vdev_metaslab_fini(vdev_t *vd); 75 extern void vdev_metaslab_set_size(vdev_t *); 76 extern void vdev_expand(vdev_t *vd, uint64_t txg); 77 extern void vdev_split(vdev_t *vd); 78 79 80 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 81 extern void vdev_clear_stats(vdev_t *vd); 82 extern void vdev_stat_update(zio_t *zio, uint64_t psize); 83 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, 84 boolean_t complete); 85 extern void vdev_propagate_state(vdev_t *vd); 86 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, 87 vdev_aux_t aux); 88 89 extern void vdev_space_update(vdev_t *vd, 90 int64_t alloc_delta, int64_t defer_delta, int64_t space_delta); 91 92 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize); 93 94 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux); 95 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux); 96 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, 97 vdev_state_t *); 98 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags); 99 extern void vdev_clear(spa_t *spa, vdev_t *vd); 100 101 extern boolean_t vdev_is_dead(vdev_t *vd); 102 extern boolean_t vdev_readable(vdev_t *vd); 103 extern boolean_t vdev_writeable(vdev_t *vd); 104 extern boolean_t vdev_allocatable(vdev_t *vd); 105 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio); 106 107 extern void vdev_cache_init(vdev_t *vd); 108 extern void vdev_cache_fini(vdev_t *vd); 109 extern int vdev_cache_read(zio_t *zio); 110 extern void vdev_cache_write(zio_t *zio); 111 extern void vdev_cache_purge(vdev_t *vd); 112 113 extern void vdev_queue_init(vdev_t *vd); 114 extern void vdev_queue_fini(vdev_t *vd); 115 extern zio_t *vdev_queue_io(zio_t *zio); 116 extern void vdev_queue_io_done(zio_t *zio); 117 118 extern void vdev_config_dirty(vdev_t *vd); 119 extern void vdev_config_clean(vdev_t *vd); 120 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg, 121 boolean_t); 122 123 extern void vdev_state_dirty(vdev_t *vd); 124 extern void vdev_state_clean(vdev_t *vd); 125 126 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config); 127 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd, 128 boolean_t getstats, boolean_t isspare, boolean_t isl2cache); 129 130 /* 131 * Label routines 132 */ 133 struct uberblock; 134 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 135 extern int vdev_label_number(uint64_t psise, uint64_t offset); 136 extern nvlist_t *vdev_label_read_config(vdev_t *vd); 137 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub); 138 139 typedef enum { 140 VDEV_LABEL_CREATE, /* create/add a new device */ 141 VDEV_LABEL_REPLACE, /* replace an existing device */ 142 VDEV_LABEL_SPARE, /* add a new hot spare */ 143 VDEV_LABEL_REMOVE, /* remove an existing device */ 144 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */ 145 VDEV_LABEL_SPLIT /* generating new label for split-off dev */ 146 } vdev_labeltype_t; 147 148 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason); 149 150 #ifdef __cplusplus 151 } 152 #endif 153 154 #endif /* _SYS_VDEV_H */ 155