vdev.h revision 332525
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/* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 25 */ 26 27#ifndef _SYS_VDEV_H 28#define _SYS_VDEV_H 29 30#include <sys/spa.h> 31#include <sys/zio.h> 32#include <sys/dmu.h> 33#include <sys/space_map.h> 34#include <sys/fs/zfs.h> 35 36#ifdef __cplusplus 37extern "C" { 38#endif 39 40typedef enum vdev_dtl_type { 41 DTL_MISSING, /* 0% replication: no copies of the data */ 42 DTL_PARTIAL, /* less than 100% replication: some copies missing */ 43 DTL_SCRUB, /* unable to fully repair during scrub/resilver */ 44 DTL_OUTAGE, /* temporarily missing (used to attempt detach) */ 45 DTL_TYPES 46} vdev_dtl_type_t; 47 48extern boolean_t zfs_nocacheflush; 49extern boolean_t zfs_trim_enabled; 50 51extern int vdev_open(vdev_t *); 52extern void vdev_open_children(vdev_t *); 53extern boolean_t vdev_uses_zvols(vdev_t *); 54extern int vdev_validate(vdev_t *, boolean_t); 55extern void vdev_close(vdev_t *); 56extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace); 57extern void vdev_reopen(vdev_t *); 58extern int vdev_validate_aux(vdev_t *vd); 59extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio); 60extern boolean_t vdev_is_concrete(vdev_t *vd); 61extern boolean_t vdev_is_bootable(vdev_t *vd); 62extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev); 63extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid); 64extern int vdev_count_leaves(spa_t *spa); 65extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d, 66 uint64_t txg, uint64_t size); 67extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d, 68 uint64_t txg, uint64_t size); 69extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d); 70extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, 71 int scrub_done); 72extern boolean_t vdev_dtl_required(vdev_t *vd); 73extern boolean_t vdev_resilver_needed(vdev_t *vd, 74 uint64_t *minp, uint64_t *maxp); 75extern void vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj, 76 dmu_tx_t *tx); 77extern uint64_t vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx); 78extern void vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx); 79extern void vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx); 80extern void vdev_indirect_mark_obsolete(vdev_t *vd, uint64_t offset, 81 uint64_t size, uint64_t txg); 82extern void spa_vdev_indirect_mark_obsolete(spa_t *spa, uint64_t vdev, 83 uint64_t offset, uint64_t size, dmu_tx_t *tx); 84 85extern void vdev_hold(vdev_t *); 86extern void vdev_rele(vdev_t *); 87 88extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg); 89extern void vdev_metaslab_fini(vdev_t *vd); 90extern void vdev_metaslab_set_size(vdev_t *); 91extern void vdev_ashift_optimize(vdev_t *); 92extern void vdev_expand(vdev_t *vd, uint64_t txg); 93extern void vdev_split(vdev_t *vd); 94extern void vdev_deadman(vdev_t *vd); 95 96extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs); 97extern void vdev_clear_stats(vdev_t *vd); 98extern void vdev_stat_update(zio_t *zio, uint64_t psize); 99extern void vdev_scan_stat_init(vdev_t *vd); 100extern void vdev_propagate_state(vdev_t *vd); 101extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, 102 vdev_aux_t aux); 103 104extern void vdev_space_update(vdev_t *vd, 105 int64_t alloc_delta, int64_t defer_delta, int64_t space_delta); 106 107extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize); 108 109extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux); 110extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux); 111extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, 112 vdev_state_t *); 113extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags); 114extern void vdev_clear(spa_t *spa, vdev_t *vd); 115 116extern boolean_t vdev_is_dead(vdev_t *vd); 117extern boolean_t vdev_readable(vdev_t *vd); 118extern boolean_t vdev_writeable(vdev_t *vd); 119extern boolean_t vdev_allocatable(vdev_t *vd); 120extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio); 121 122extern void vdev_cache_init(vdev_t *vd); 123extern void vdev_cache_fini(vdev_t *vd); 124extern boolean_t vdev_cache_read(zio_t *zio); 125extern void vdev_cache_write(zio_t *zio); 126extern void vdev_cache_purge(vdev_t *vd); 127 128extern void vdev_queue_init(vdev_t *vd); 129extern void vdev_queue_fini(vdev_t *vd); 130extern zio_t *vdev_queue_io(zio_t *zio); 131extern void vdev_queue_io_done(zio_t *zio); 132extern int vdev_queue_length(vdev_t *vd); 133extern uint64_t vdev_queue_lastoffset(vdev_t *vd); 134extern void vdev_queue_register_lastoffset(vdev_t *vd, zio_t *zio); 135 136extern void vdev_config_dirty(vdev_t *vd); 137extern void vdev_config_clean(vdev_t *vd); 138extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg); 139 140extern void vdev_state_dirty(vdev_t *vd); 141extern void vdev_state_clean(vdev_t *vd); 142 143typedef enum vdev_config_flag { 144 VDEV_CONFIG_SPARE = 1 << 0, 145 VDEV_CONFIG_L2CACHE = 1 << 1, 146 VDEV_CONFIG_REMOVING = 1 << 2, 147 VDEV_CONFIG_MOS = 1 << 3 148} vdev_config_flag_t; 149 150extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config); 151extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd, 152 boolean_t getstats, vdev_config_flag_t flags); 153 154/* 155 * Label routines 156 */ 157struct uberblock; 158extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset); 159extern int vdev_label_number(uint64_t psise, uint64_t offset); 160extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg); 161extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **); 162 163typedef enum { 164 VDEV_LABEL_CREATE, /* create/add a new device */ 165 VDEV_LABEL_REPLACE, /* replace an existing device */ 166 VDEV_LABEL_SPARE, /* add a new hot spare */ 167 VDEV_LABEL_REMOVE, /* remove an existing device */ 168 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */ 169 VDEV_LABEL_SPLIT /* generating new label for split-off dev */ 170} vdev_labeltype_t; 171 172extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason); 173 174extern int vdev_label_write_pad2(vdev_t *vd, const char *buf, size_t size); 175 176#ifdef __cplusplus 177} 178#endif 179 180#endif /* _SYS_VDEV_H */ 181