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 /* 42 * Vdev knobs. 43 */ 44 typedef struct vdev_knob { 45 char *vk_name; /* knob name */ 46 char *vk_desc; /* knob description */ 47 uint64_t vk_min; /* minimum legal value */ 48 uint64_t vk_max; /* maximum legal value */ 49 uint64_t vk_default; /* default value */ 50 size_t vk_offset; /* offset into vdev_t */ 51 } vdev_knob_t; 52 53 /* 54 * Fault injection modes. 55 */ 56 #define VDEV_FAULT_NONE 0 57 #define VDEV_FAULT_RANDOM 1 58 #define VDEV_FAULT_COUNT 2 59 60 extern int vdev_open(vdev_t *); 61 extern void vdev_close(vdev_t *); 62 extern int vdev_create(vdev_t *, uint64_t txg); 63 extern int vdev_init(vdev_t *, uint64_t txg); 64 extern void vdev_reopen(vdev_t *); 65 66 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev); 67 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid); 68 extern void vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size); 69 extern int vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size); 70 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, 71 int scrub_done); 72 73 extern const char *vdev_description(vdev_t *vd); 74 75 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg); 76 extern void vdev_metaslab_fini(vdev_t *vd); 77 78 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 79 extern void vdev_stat_update(zio_t *zio); 80 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, 81 boolean_t complete); 82 extern int vdev_getspec(spa_t *spa, uint64_t vdev, char **vdev_spec); 83 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, 84 vdev_aux_t aux); 85 86 extern void vdev_space_update(vdev_t *vd, uint64_t space_delta, 87 uint64_t alloc_delta); 88 89 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize); 90 91 extern void vdev_io_start(zio_t *zio); 92 extern void vdev_io_done(zio_t *zio); 93 94 extern int vdev_online(spa_t *spa, uint64_t guid); 95 extern int vdev_offline(spa_t *spa, uint64_t guid, int istmp); 96 extern void vdev_clear(spa_t *spa, vdev_t *vd); 97 98 extern int vdev_error_inject(vdev_t *vd, zio_t *zio); 99 extern int vdev_is_dead(vdev_t *vd); 100 101 extern void vdev_cache_init(vdev_t *vd); 102 extern void vdev_cache_fini(vdev_t *vd); 103 extern int vdev_cache_read(zio_t *zio); 104 extern void vdev_cache_write(zio_t *zio); 105 106 extern void vdev_queue_init(vdev_t *vd); 107 extern void vdev_queue_fini(vdev_t *vd); 108 extern zio_t *vdev_queue_io(zio_t *zio); 109 extern void vdev_queue_io_done(zio_t *zio); 110 111 extern vdev_knob_t *vdev_knob_next(vdev_knob_t *vk); 112 113 extern void vdev_config_dirty(vdev_t *vd); 114 extern void vdev_config_clean(vdev_t *vd); 115 116 extern nvlist_t *vdev_config_generate(vdev_t *vd, int getstats); 117 118 /* 119 * Label routines 120 */ 121 struct uberblock; 122 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 123 extern nvlist_t *vdev_label_read_config(vdev_t *vd); 124 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub); 125 int vdev_label_init(vdev_t *vd, uint64_t create_txg); 126 extern int spa_sync_labels(spa_t *spa, uint64_t txg); 127 128 #ifdef __cplusplus 129 } 130 #endif 131 132 #endif /* _SYS_VDEV_H */ 133