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 2008 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 extern boolean_t zfs_nocacheflush; 40 41 extern int vdev_open(vdev_t *); 42 extern int vdev_validate(vdev_t *); 43 extern void vdev_close(vdev_t *); 44 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace); 45 extern void vdev_init(vdev_t *, uint64_t txg); 46 extern void vdev_reopen(vdev_t *); 47 extern int vdev_validate_aux(vdev_t *vd); 48 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio); 49 50 extern boolean_t vdev_is_bootable(vdev_t *vd); 51 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev); 52 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid); 53 extern void vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size); 54 extern int vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size); 55 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, 56 int scrub_done); 57 extern boolean_t vdev_resilver_needed(vdev_t *vd, 58 uint64_t *minp, uint64_t *maxp); 59 60 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg); 61 extern void vdev_metaslab_fini(vdev_t *vd); 62 63 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 64 extern void vdev_clear_stats(vdev_t *vd); 65 extern void vdev_stat_update(zio_t *zio, uint64_t psize); 66 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, 67 boolean_t complete); 68 extern int vdev_getspec(spa_t *spa, uint64_t vdev, char **vdev_spec); 69 extern void vdev_propagate_state(vdev_t *vd); 70 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, 71 vdev_aux_t aux); 72 73 extern void vdev_space_update(vdev_t *vd, int64_t space_delta, 74 int64_t alloc_delta, boolean_t update_root); 75 76 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize); 77 78 extern int vdev_fault(spa_t *spa, uint64_t guid); 79 extern int vdev_degrade(spa_t *spa, uint64_t guid); 80 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, 81 vdev_state_t *); 82 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags); 83 extern void vdev_clear(spa_t *spa, vdev_t *vd); 84 85 extern boolean_t vdev_is_dead(vdev_t *vd); 86 extern boolean_t vdev_readable(vdev_t *vd); 87 extern boolean_t vdev_writeable(vdev_t *vd); 88 extern boolean_t vdev_allocatable(vdev_t *vd); 89 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio); 90 91 extern void vdev_cache_init(vdev_t *vd); 92 extern void vdev_cache_fini(vdev_t *vd); 93 extern int vdev_cache_read(zio_t *zio); 94 extern void vdev_cache_write(zio_t *zio); 95 extern void vdev_cache_purge(vdev_t *vd); 96 97 extern void vdev_queue_init(vdev_t *vd); 98 extern void vdev_queue_fini(vdev_t *vd); 99 extern zio_t *vdev_queue_io(zio_t *zio); 100 extern void vdev_queue_io_done(zio_t *zio); 101 102 extern void vdev_config_dirty(vdev_t *vd); 103 extern void vdev_config_clean(vdev_t *vd); 104 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg); 105 106 extern void vdev_state_dirty(vdev_t *vd); 107 extern void vdev_state_clean(vdev_t *vd); 108 109 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd, 110 boolean_t getstats, boolean_t isspare, boolean_t isl2cache); 111 112 /* 113 * Label routines 114 */ 115 struct uberblock; 116 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 117 extern int vdev_label_number(uint64_t psise, uint64_t offset); 118 extern nvlist_t *vdev_label_read_config(vdev_t *vd); 119 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub); 120 121 typedef enum { 122 VDEV_LABEL_CREATE, /* create/add a new device */ 123 VDEV_LABEL_REPLACE, /* replace an existing device */ 124 VDEV_LABEL_SPARE, /* add a new hot spare */ 125 VDEV_LABEL_REMOVE, /* remove an existing device */ 126 VDEV_LABEL_L2CACHE /* add an L2ARC cache device */ 127 } vdev_labeltype_t; 128 129 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason); 130 131 #ifdef __cplusplus 132 } 133 #endif 134 135 #endif /* _SYS_VDEV_H */ 136