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 2009 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 78 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 79 extern void vdev_clear_stats(vdev_t *vd); 80 extern void vdev_stat_update(zio_t *zio, uint64_t psize); 81 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, 82 boolean_t complete); 83 extern void vdev_propagate_state(vdev_t *vd); 84 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, 85 vdev_aux_t aux); 86 87 extern void vdev_space_update(vdev_t *vd, 88 int64_t alloc_delta, int64_t defer_delta, int64_t space_delta); 89 90 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize); 91 92 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux); 93 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux); 94 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, 95 vdev_state_t *); 96 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags); 97 extern void vdev_clear(spa_t *spa, vdev_t *vd); 98 99 extern boolean_t vdev_is_dead(vdev_t *vd); 100 extern boolean_t vdev_readable(vdev_t *vd); 101 extern boolean_t vdev_writeable(vdev_t *vd); 102 extern boolean_t vdev_allocatable(vdev_t *vd); 103 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio); 104 105 extern void vdev_cache_init(vdev_t *vd); 106 extern void vdev_cache_fini(vdev_t *vd); 107 extern int vdev_cache_read(zio_t *zio); 108 extern void vdev_cache_write(zio_t *zio); 109 extern void vdev_cache_purge(vdev_t *vd); 110 111 extern void vdev_queue_init(vdev_t *vd); 112 extern void vdev_queue_fini(vdev_t *vd); 113 extern zio_t *vdev_queue_io(zio_t *zio); 114 extern void vdev_queue_io_done(zio_t *zio); 115 116 extern void vdev_config_dirty(vdev_t *vd); 117 extern void vdev_config_clean(vdev_t *vd); 118 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg, 119 boolean_t); 120 121 extern void vdev_state_dirty(vdev_t *vd); 122 extern void vdev_state_clean(vdev_t *vd); 123 124 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config); 125 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd, 126 boolean_t getstats, boolean_t isspare, boolean_t isl2cache); 127 128 /* 129 * Label routines 130 */ 131 struct uberblock; 132 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 133 extern int vdev_label_number(uint64_t psise, uint64_t offset); 134 extern nvlist_t *vdev_label_read_config(vdev_t *vd); 135 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub); 136 137 typedef enum { 138 VDEV_LABEL_CREATE, /* create/add a new device */ 139 VDEV_LABEL_REPLACE, /* replace an existing device */ 140 VDEV_LABEL_SPARE, /* add a new hot spare */ 141 VDEV_LABEL_REMOVE, /* remove an existing device */ 142 VDEV_LABEL_L2CACHE /* add an L2ARC cache device */ 143 } vdev_labeltype_t; 144 145 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason); 146 147 #ifdef __cplusplus 148 } 149 #endif 150 151 #endif /* _SYS_VDEV_H */ 152