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annotate usr/src/uts/common/fs/zfs/sys/vdev.h @ 13869:921a99998bb4

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3246 ZFS I/O deadman thread Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com> Reviewed by: Eric Schrock <eric.schrock@delphix.com> Reviewed by: Christopher Siden <chris.siden@delphix.com> Approved by: Garrett D'Amore <garrett@damore.org>
author George.Wilson <george.wilson@delphix.com>
date Mon, 29 Oct 2012 12:08:09 -0500
parents b1e53580146d
children
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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License (the "License").
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6 * You may not use this file except in compliance with the License.
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7 *
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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9 * or http://www.opensolaris.org/os/licensing.
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10 * See the License for the specific language governing permissions
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11 * and limitations under the License.
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12 *
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13 * When distributing Covered Code, include this CDDL HEADER in each
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 * If applicable, add the following below this CDDL HEADER, with the
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16 * fields enclosed by brackets "[]" replaced with your own identifying
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17 * information: Portions Copyright [yyyy] [name of copyright owner]
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18 *
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19 * CDDL HEADER END
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20 */
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21
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22 /*
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23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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24 * Copyright (c) 2012 by Delphix. All rights reserved.
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25 */
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26
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27 #ifndef _SYS_VDEV_H
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28 #define _SYS_VDEV_H
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29
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30 #include <sys/spa.h>
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31 #include <sys/zio.h>
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32 #include <sys/dmu.h>
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33 #include <sys/space_map.h>
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34 #include <sys/fs/zfs.h>
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35
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36 #ifdef __cplusplus
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37 extern "C" {
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38 #endif
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39
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40 typedef enum vdev_dtl_type {
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41 DTL_MISSING, /* 0% replication: no copies of the data */
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42 DTL_PARTIAL, /* less than 100% replication: some copies missing */
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43 DTL_SCRUB, /* unable to fully repair during scrub/resilver */
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44 DTL_OUTAGE, /* temporarily missing (used to attempt detach) */
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45 DTL_TYPES
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46 } vdev_dtl_type_t;
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47
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48 extern boolean_t zfs_nocacheflush;
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49
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50 extern int vdev_open(vdev_t *);
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51 extern void vdev_open_children(vdev_t *);
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52 extern boolean_t vdev_uses_zvols(vdev_t *);
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53 extern int vdev_validate(vdev_t *, boolean_t);
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54 extern void vdev_close(vdev_t *);
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55 extern int vdev_create(vdev_t *, uint64_t txg, boolean_t isreplace);
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56 extern void vdev_reopen(vdev_t *);
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57 extern int vdev_validate_aux(vdev_t *vd);
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58 extern zio_t *vdev_probe(vdev_t *vd, zio_t *pio);
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59
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60 extern boolean_t vdev_is_bootable(vdev_t *vd);
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61 extern vdev_t *vdev_lookup_top(spa_t *spa, uint64_t vdev);
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62 extern vdev_t *vdev_lookup_by_guid(vdev_t *vd, uint64_t guid);
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63 extern void vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t d,
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64 uint64_t txg, uint64_t size);
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65 extern boolean_t vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t d,
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66 uint64_t txg, uint64_t size);
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67 extern boolean_t vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t d);
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68 extern void vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg,
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69 int scrub_done);
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70 extern boolean_t vdev_dtl_required(vdev_t *vd);
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71 extern boolean_t vdev_resilver_needed(vdev_t *vd,
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72 uint64_t *minp, uint64_t *maxp);
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73
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74 extern void vdev_hold(vdev_t *);
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75 extern void vdev_rele(vdev_t *);
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76
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77 extern int vdev_metaslab_init(vdev_t *vd, uint64_t txg);
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78 extern void vdev_metaslab_fini(vdev_t *vd);
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79 extern void vdev_metaslab_set_size(vdev_t *);
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80 extern void vdev_expand(vdev_t *vd, uint64_t txg);
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81 extern void vdev_split(vdev_t *vd);
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82 extern void vdev_deadman(vdev_t *vd);
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83
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84
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85 extern void vdev_get_stats(vdev_t *vd, vdev_stat_t *vs);
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86 extern void vdev_clear_stats(vdev_t *vd);
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87 extern void vdev_stat_update(zio_t *zio, uint64_t psize);
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88 extern void vdev_scan_stat_init(vdev_t *vd);
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89 extern void vdev_propagate_state(vdev_t *vd);
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90 extern void vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state,
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91 vdev_aux_t aux);
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92
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93 extern void vdev_space_update(vdev_t *vd,
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94 int64_t alloc_delta, int64_t defer_delta, int64_t space_delta);
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95
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96 extern uint64_t vdev_psize_to_asize(vdev_t *vd, uint64_t psize);
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97
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98 extern int vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux);
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99 extern int vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux);
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100 extern int vdev_online(spa_t *spa, uint64_t guid, uint64_t flags,
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101 vdev_state_t *);
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102 extern int vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags);
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103 extern void vdev_clear(spa_t *spa, vdev_t *vd);
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104
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105 extern boolean_t vdev_is_dead(vdev_t *vd);
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106 extern boolean_t vdev_readable(vdev_t *vd);
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107 extern boolean_t vdev_writeable(vdev_t *vd);
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108 extern boolean_t vdev_allocatable(vdev_t *vd);
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109 extern boolean_t vdev_accessible(vdev_t *vd, zio_t *zio);
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110
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111 extern void vdev_cache_init(vdev_t *vd);
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112 extern void vdev_cache_fini(vdev_t *vd);
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113 extern int vdev_cache_read(zio_t *zio);
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114 extern void vdev_cache_write(zio_t *zio);
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115 extern void vdev_cache_purge(vdev_t *vd);
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116
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117 extern void vdev_queue_init(vdev_t *vd);
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118 extern void vdev_queue_fini(vdev_t *vd);
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119 extern zio_t *vdev_queue_io(zio_t *zio);
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120 extern void vdev_queue_io_done(zio_t *zio);
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121
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122 extern void vdev_config_dirty(vdev_t *vd);
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123 extern void vdev_config_clean(vdev_t *vd);
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124 extern int vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg,
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125 boolean_t);
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126
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127 extern void vdev_state_dirty(vdev_t *vd);
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128 extern void vdev_state_clean(vdev_t *vd);
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129
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130 typedef enum vdev_config_flag {
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131 VDEV_CONFIG_SPARE = 1 << 0,
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132 VDEV_CONFIG_L2CACHE = 1 << 1,
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133 VDEV_CONFIG_REMOVING = 1 << 2
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134 } vdev_config_flag_t;
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135
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136 extern void vdev_top_config_generate(spa_t *spa, nvlist_t *config);
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137 extern nvlist_t *vdev_config_generate(spa_t *spa, vdev_t *vd,
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138 boolean_t getstats, vdev_config_flag_t flags);
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139
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140 /*
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141 * Label routines
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142 */
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143 struct uberblock;
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144 extern uint64_t vdev_label_offset(uint64_t psize, int l, uint64_t offset);
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145 extern int vdev_label_number(uint64_t psise, uint64_t offset);
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146 extern nvlist_t *vdev_label_read_config(vdev_t *vd, uint64_t txg);
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147 extern void vdev_uberblock_load(vdev_t *, struct uberblock *, nvlist_t **);
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148
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149 typedef enum {
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150 VDEV_LABEL_CREATE, /* create/add a new device */
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151 VDEV_LABEL_REPLACE, /* replace an existing device */
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152 VDEV_LABEL_SPARE, /* add a new hot spare */
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153 VDEV_LABEL_REMOVE, /* remove an existing device */
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154 VDEV_LABEL_L2CACHE, /* add an L2ARC cache device */
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155 VDEV_LABEL_SPLIT /* generating new label for split-off dev */
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156 } vdev_labeltype_t;
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157
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158 extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
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159
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160 #ifdef __cplusplus
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161 }
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162 #endif
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163
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164 #endif /* _SYS_VDEV_H */