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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_VDEV_H 28 #define _SYS_VDEV_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/spa.h> 33 #include <sys/zio.h> 34 #include <sys/dmu.h> 35 #include <sys/space_map.h> 36 #include <sys/fs/zfs.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * Vdev knobs. 44 */ 45 typedef struct vdev_knob { 46 char *vk_name; /* knob name */ 47 char *vk_desc; /* knob description */ 48 uint64_t vk_min; /* minimum legal value */ 49 uint64_t vk_max; /* maximum legal value */ 50 uint64_t vk_default; /* default value */ 51 size_t vk_offset; /* offset into vdev_t */ 52 } vdev_knob_t; 53 54 /* 55 * Fault injection modes. 56 */ 57 #define VDEV_FAULT_NONE 0 58 #define VDEV_FAULT_RANDOM 1 59 #define VDEV_FAULT_COUNT 2 60 61 extern int vdev_open(vdev_t *); 62 extern void vdev_close(vdev_t *); 63 extern int vdev_create(vdev_t *, uint64_t txg); 64 extern void vdev_init(vdev_t *, uint64_t txg); 65 extern void vdev_reopen(vdev_t *, zio_t **zq); 66 67 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev); 68 extern vdev_t *vdev_lookup_by_path(vdev_t *vd, const char *path); 69 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid); 70 extern void vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size); 71 extern int vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size); 72 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, 73 int scrub_done); 74 75 extern const char *vdev_description(vdev_t *vd); 76 77 extern void vdev_metaslab_init(vdev_t *vd, uint64_t txg); 78 extern void vdev_metaslab_fini(vdev_t *vd); 79 80 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 81 extern void vdev_stat_update(zio_t *zio); 82 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, 83 boolean_t complete); 84 extern void vdev_checksum_error(zio_t *zio, vdev_t *vd); 85 extern int vdev_getspec(spa_t *spa, uint64_t vdev, char **vdev_spec); 86 extern void vdev_set_state(vdev_t *vd, vdev_state_t state, vdev_aux_t aux); 87 88 extern void vdev_space_update(vdev_t *vd, uint64_t space_delta, 89 uint64_t alloc_delta); 90 91 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize); 92 93 extern void vdev_io_start(zio_t *zio); 94 extern void vdev_io_done(zio_t *zio); 95 96 extern int vdev_online(spa_t *spa, const char *path); 97 extern int vdev_offline(spa_t *spa, const char *path); 98 99 extern int vdev_error_setup(spa_t *spa, const char *path, int mode, int mask, 100 uint64_t arg); 101 extern int vdev_error_inject(vdev_t *vd, zio_t *zio); 102 extern int vdev_is_dead(vdev_t *vd); 103 104 extern void vdev_cache_init(vdev_t *vd); 105 extern void vdev_cache_fini(vdev_t *vd); 106 extern int vdev_cache_read(zio_t *zio); 107 extern void vdev_cache_write(zio_t *zio); 108 109 extern void vdev_queue_init(vdev_t *vd); 110 extern void vdev_queue_fini(vdev_t *vd); 111 extern zio_t *vdev_queue_io(zio_t *zio); 112 extern void vdev_queue_io_done(zio_t *zio); 113 114 extern vdev_knob_t *vdev_knob_next(vdev_knob_t *vk); 115 116 extern void vdev_config_dirty(vdev_t *vd); 117 extern void vdev_config_clean(vdev_t *vd); 118 119 extern nvlist_t *vdev_config_generate(vdev_t *vd, int getstats); 120 121 /* 122 * Label routines 123 */ 124 struct uberblock; 125 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 126 extern nvlist_t *vdev_label_read_config(vdev_t *vd); 127 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub); 128 int vdev_label_init(vdev_t *vd, uint64_t create_txg); 129 extern int spa_sync_labels(spa_t *spa, uint64_t txg); 130 131 #ifdef __cplusplus 132 } 133 #endif 134 135 #endif /* _SYS_VDEV_H */ 136