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 2006 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 #pragma ident "%Z%%M% %I% %E% SMI" 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 extern boolean_t zfs_nocacheflush; 42 43 /* 44 * Vdev knobs. 45 */ 46 typedef struct vdev_knob { 47 char *vk_name; /* knob name */ 48 char *vk_desc; /* knob description */ 49 uint64_t vk_min; /* minimum legal value */ 50 uint64_t vk_max; /* maximum legal value */ 51 uint64_t vk_default; /* default value */ 52 size_t vk_offset; /* offset into vdev_t */ 53 } vdev_knob_t; 54 55 /* 56 * Fault injection modes. 57 */ 58 #define VDEV_FAULT_NONE 0 59 #define VDEV_FAULT_RANDOM 1 60 #define VDEV_FAULT_COUNT 2 61 62 extern int vdev_open(vdev_t *); 63 extern int vdev_validate(vdev_t *); 64 extern void vdev_close(vdev_t *); 65 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace); 66 extern void vdev_init(vdev_t *, uint64_t txg); 67 extern void vdev_reopen(vdev_t *); 68 extern int vdev_validate_spare(vdev_t *); 69 70 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev); 71 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid); 72 extern void vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size); 73 extern int vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size); 74 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, 75 int scrub_done); 76 77 extern const char *vdev_description(vdev_t *vd); 78 79 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg); 80 extern void vdev_metaslab_fini(vdev_t *vd); 81 82 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 83 extern void vdev_stat_update(zio_t *zio); 84 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, 85 boolean_t complete); 86 extern int vdev_getspec(spa_t *spa, uint64_t vdev, char **vdev_spec); 87 extern void vdev_propagate_state(vdev_t *vd); 88 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, 89 vdev_aux_t aux); 90 91 extern void vdev_space_update(vdev_t *vd, int64_t space_delta, 92 int64_t alloc_delta); 93 94 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize); 95 96 extern void vdev_io_start(zio_t *zio); 97 extern void vdev_io_done(zio_t *zio); 98 99 extern int vdev_online(spa_t *spa, uint64_t guid); 100 extern int vdev_offline(spa_t *spa, uint64_t guid, int istmp); 101 extern void vdev_clear(spa_t *spa, vdev_t *vd); 102 103 extern int vdev_error_inject(vdev_t *vd, zio_t *zio); 104 extern int vdev_is_dead(vdev_t *vd); 105 106 extern void vdev_cache_init(vdev_t *vd); 107 extern void vdev_cache_fini(vdev_t *vd); 108 extern int vdev_cache_read(zio_t *zio); 109 extern void vdev_cache_write(zio_t *zio); 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 vdev_knob_t *vdev_knob_next(vdev_knob_t *vk); 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 *vd, uint64_t txg); 121 122 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd, 123 boolean_t getstats, boolean_t isspare); 124 125 /* 126 * Label routines 127 */ 128 struct uberblock; 129 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 130 extern nvlist_t *vdev_label_read_config(vdev_t *vd); 131 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub); 132 int vdev_label_init(vdev_t *vd, uint64_t create_txg, boolean_t isreplacing); 133 int vdev_label_spare(vdev_t *vd, uint64_t create_txg); 134 135 #ifdef __cplusplus 136 } 137 #endif 138 139 #endif /* _SYS_VDEV_H */ 140