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 #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 * Fault injection modes. 45 */ 46 #define VDEV_FAULT_NONE 0 47 #define VDEV_FAULT_RANDOM 1 48 #define VDEV_FAULT_COUNT 2 49 50 extern int vdev_open(vdev_t *); 51 extern int vdev_validate(vdev_t *); 52 extern void vdev_close(vdev_t *); 53 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace); 54 extern void vdev_init(vdev_t *, uint64_t txg); 55 extern void vdev_reopen(vdev_t *); 56 extern int vdev_validate_aux(vdev_t *vd); 57 extern int vdev_probe(vdev_t *); 58 59 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev); 60 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid); 61 extern void vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size); 62 extern int vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size); 63 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, 64 int scrub_done); 65 66 extern const char *vdev_description(vdev_t *vd); 67 68 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg); 69 extern void vdev_metaslab_fini(vdev_t *vd); 70 71 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 72 extern void vdev_clear_stats(vdev_t *vd); 73 extern void vdev_stat_update(zio_t *zio); 74 extern void vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, 75 boolean_t complete); 76 extern int vdev_getspec(spa_t *spa, uint64_t vdev, char **vdev_spec); 77 extern void vdev_propagate_state(vdev_t *vd); 78 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, 79 vdev_aux_t aux); 80 81 extern void vdev_space_update(vdev_t *vd, int64_t space_delta, 82 int64_t alloc_delta, boolean_t update_root); 83 84 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize); 85 86 extern int vdev_fault(spa_t *spa, uint64_t guid); 87 extern int vdev_degrade(spa_t *spa, uint64_t guid); 88 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, 89 vdev_state_t *); 90 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags); 91 extern void vdev_clear(spa_t *spa, vdev_t *vd, boolean_t reopen_wanted); 92 93 extern int vdev_error_inject(vdev_t *vd, zio_t *zio); 94 extern int vdev_is_dead(vdev_t *vd); 95 extern int vdev_readable(vdev_t *vd); 96 extern int vdev_writeable(vdev_t *vd); 97 98 extern void vdev_cache_init(vdev_t *vd); 99 extern void vdev_cache_fini(vdev_t *vd); 100 extern int vdev_cache_read(zio_t *zio); 101 extern void vdev_cache_write(zio_t *zio); 102 extern void vdev_cache_purge(vdev_t *vd); 103 104 extern void vdev_queue_init(vdev_t *vd); 105 extern void vdev_queue_fini(vdev_t *vd); 106 extern zio_t *vdev_queue_io(zio_t *zio); 107 extern void vdev_queue_io_done(zio_t *zio); 108 109 extern void vdev_config_dirty(vdev_t *vd); 110 extern void vdev_config_clean(vdev_t *vd); 111 extern void vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg); 112 113 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd, 114 boolean_t getstats, boolean_t isspare, boolean_t isl2cache); 115 116 /* 117 * Label routines 118 */ 119 struct uberblock; 120 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 121 extern int vdev_label_number(uint64_t psise, uint64_t offset); 122 extern nvlist_t *vdev_label_read_config(vdev_t *vd); 123 extern void vdev_uberblock_load(zio_t *zio, vdev_t *vd, struct uberblock *ub); 124 125 typedef enum { 126 VDEV_LABEL_CREATE, /* create/add a new device */ 127 VDEV_LABEL_REPLACE, /* replace an existing device */ 128 VDEV_LABEL_SPARE, /* add a new hot spare */ 129 VDEV_LABEL_REMOVE, /* remove an existing device */ 130 VDEV_LABEL_L2CACHE /* add an L2ARC cache device */ 131 } vdev_labeltype_t; 132 133 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason); 134 135 #ifdef __cplusplus 136 } 137 #endif 138 139 #endif /* _SYS_VDEV_H */ 140