1 | /* revs-txns.c : operations on revision and transactions |
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2 | * |
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3 | * ==================================================================== |
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4 | * Copyright (c) 2000-2007 CollabNet. All rights reserved. |
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5 | * |
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6 | * This software is licensed as described in the file COPYING, which |
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7 | * you should have received as part of this distribution. The terms |
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8 | * are also available at http://subversion.tigris.org/license-1.html. |
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9 | * If newer versions of this license are posted there, you may use a |
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10 | * newer version instead, at your option. |
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11 | * |
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12 | * This software consists of voluntary contributions made by many |
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13 | * individuals. For exact contribution history, see the revision |
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14 | * history and logs, available at http://subversion.tigris.org/. |
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15 | * ==================================================================== |
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16 | */ |
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17 | |
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18 | #include <string.h> |
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19 | |
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20 | #include <apr_tables.h> |
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21 | #include <apr_pools.h> |
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22 | |
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23 | #include "svn_pools.h" |
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24 | #include "svn_time.h" |
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25 | #include "svn_fs.h" |
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26 | #include "svn_props.h" |
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27 | #include "svn_hash.h" |
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28 | #include "svn_io.h" |
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29 | |
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30 | #include "fs.h" |
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31 | #include "dag.h" |
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32 | #include "err.h" |
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33 | #include "trail.h" |
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34 | #include "tree.h" |
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35 | #include "revs-txns.h" |
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36 | #include "key-gen.h" |
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37 | #include "id.h" |
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38 | #include "bdb/rev-table.h" |
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39 | #include "bdb/txn-table.h" |
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40 | #include "bdb/copies-table.h" |
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41 | #include "bdb/changes-table.h" |
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42 | #include "../libsvn_fs/fs-loader.h" |
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43 | |
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44 | #include "svn_private_config.h" |
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45 | #include "private/svn_fs_util.h" |
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46 | |
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47 | |
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48 | /*** Helpers ***/ |
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49 | |
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50 | /* Set *txn_p to a transaction object allocated in POOL for the |
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51 | transaction in FS whose id is TXN_ID. If EXPECT_DEAD is set, this |
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52 | transaction must be a dead one, else an error is returned. If |
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53 | EXPECT_DEAD is not set, an error is thrown if the transaction is |
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54 | *not* dead. */ |
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55 | static svn_error_t * |
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56 | get_txn(transaction_t **txn_p, |
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57 | svn_fs_t *fs, |
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58 | const char *txn_id, |
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59 | svn_boolean_t expect_dead, |
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60 | trail_t *trail, |
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61 | apr_pool_t *pool) |
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62 | { |
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63 | transaction_t *txn; |
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64 | SVN_ERR(svn_fs_bdb__get_txn(&txn, fs, txn_id, trail, pool)); |
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65 | if (expect_dead && (txn->kind != transaction_kind_dead)) |
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66 | return svn_error_createf(SVN_ERR_FS_TRANSACTION_NOT_DEAD, 0, |
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67 | _("Transaction is not dead: '%s'"), txn_id); |
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68 | if ((! expect_dead) && (txn->kind == transaction_kind_dead)) |
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69 | return svn_error_createf(SVN_ERR_FS_TRANSACTION_DEAD, 0, |
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70 | _("Transaction is dead: '%s'"), txn_id); |
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71 | *txn_p = txn; |
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72 | return SVN_NO_ERROR; |
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73 | } |
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74 | |
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75 | |
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76 | /* This is only for symmetry with the get_txn() helper. */ |
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77 | #define put_txn svn_fs_bdb__put_txn |
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78 | |
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79 | |
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80 | |
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81 | /*** Revisions ***/ |
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82 | |
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83 | /* Return the committed transaction record *TXN_P and its ID *TXN_ID |
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84 | (as long as those parameters aren't NULL) for the revision REV in |
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85 | FS as part of TRAIL. */ |
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86 | static svn_error_t * |
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87 | get_rev_txn(transaction_t **txn_p, |
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88 | const char **txn_id, |
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89 | svn_fs_t *fs, |
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90 | svn_revnum_t rev, |
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91 | trail_t *trail, |
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92 | apr_pool_t *pool) |
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93 | { |
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94 | revision_t *revision; |
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95 | transaction_t *txn; |
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96 | |
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97 | SVN_ERR(svn_fs_bdb__get_rev(&revision, fs, rev, trail, pool)); |
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98 | if (revision->txn_id == NULL) |
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99 | return svn_fs_base__err_corrupt_fs_revision(fs, rev); |
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100 | |
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101 | SVN_ERR(get_txn(&txn, fs, revision->txn_id, FALSE, trail, pool)); |
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102 | if (txn->revision != rev) |
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103 | return svn_fs_base__err_corrupt_txn(fs, revision->txn_id); |
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104 | |
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105 | if (txn_p) |
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106 | *txn_p = txn; |
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107 | if (txn_id) |
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108 | *txn_id = revision->txn_id; |
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109 | return SVN_NO_ERROR; |
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110 | } |
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111 | |
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112 | |
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113 | svn_error_t * |
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114 | svn_fs_base__rev_get_root(const svn_fs_id_t **root_id_p, |
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115 | svn_fs_t *fs, |
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116 | svn_revnum_t rev, |
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117 | trail_t *trail, |
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118 | apr_pool_t *pool) |
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119 | { |
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120 | transaction_t *txn; |
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121 | |
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122 | SVN_ERR(get_rev_txn(&txn, NULL, fs, rev, trail, pool)); |
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123 | if (txn->root_id == NULL) |
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124 | return svn_fs_base__err_corrupt_fs_revision(fs, rev); |
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125 | |
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126 | *root_id_p = txn->root_id; |
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127 | return SVN_NO_ERROR; |
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128 | } |
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129 | |
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130 | |
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131 | svn_error_t * |
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132 | svn_fs_base__rev_get_txn_id(const char **txn_id_p, |
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133 | svn_fs_t *fs, |
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134 | svn_revnum_t rev, |
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135 | trail_t *trail, |
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136 | apr_pool_t *pool) |
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137 | { |
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138 | revision_t *revision; |
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139 | |
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140 | SVN_ERR(svn_fs_bdb__get_rev(&revision, fs, rev, trail, pool)); |
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141 | if (revision->txn_id == NULL) |
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142 | return svn_fs_base__err_corrupt_fs_revision(fs, rev); |
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143 | |
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144 | *txn_id_p = revision->txn_id; |
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145 | return SVN_NO_ERROR; |
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146 | } |
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147 | |
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148 | |
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149 | static svn_error_t * |
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150 | txn_body_youngest_rev(void *baton, trail_t *trail) |
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151 | { |
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152 | return svn_fs_bdb__youngest_rev(baton, trail->fs, trail, trail->pool); |
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153 | } |
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154 | |
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155 | |
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156 | svn_error_t * |
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157 | svn_fs_base__youngest_rev(svn_revnum_t *youngest_p, |
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158 | svn_fs_t *fs, |
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159 | apr_pool_t *pool) |
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160 | { |
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161 | svn_revnum_t youngest; |
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162 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
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163 | SVN_ERR(svn_fs_base__retry_txn(fs, txn_body_youngest_rev, &youngest, |
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164 | TRUE, pool)); |
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165 | *youngest_p = youngest; |
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166 | return SVN_NO_ERROR; |
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167 | } |
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168 | |
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169 | |
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170 | struct revision_proplist_args { |
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171 | apr_hash_t **table_p; |
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172 | svn_revnum_t rev; |
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173 | }; |
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174 | |
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175 | |
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176 | static svn_error_t * |
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177 | txn_body_revision_proplist(void *baton, trail_t *trail) |
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178 | { |
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179 | struct revision_proplist_args *args = baton; |
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180 | transaction_t *txn; |
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181 | |
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182 | SVN_ERR(get_rev_txn(&txn, NULL, trail->fs, args->rev, trail, trail->pool)); |
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183 | *(args->table_p) = txn->proplist; |
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184 | return SVN_NO_ERROR; |
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185 | } |
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186 | |
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187 | |
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188 | svn_error_t * |
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189 | svn_fs_base__revision_proplist(apr_hash_t **table_p, |
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190 | svn_fs_t *fs, |
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191 | svn_revnum_t rev, |
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192 | apr_pool_t *pool) |
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193 | { |
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194 | struct revision_proplist_args args; |
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195 | apr_hash_t *table; |
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196 | |
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197 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
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198 | |
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199 | args.table_p = &table; |
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200 | args.rev = rev; |
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201 | SVN_ERR(svn_fs_base__retry_txn(fs, txn_body_revision_proplist, &args, |
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202 | FALSE, pool)); |
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203 | |
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204 | *table_p = table ? table : apr_hash_make(pool); |
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205 | return SVN_NO_ERROR; |
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206 | } |
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207 | |
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208 | |
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209 | svn_error_t * |
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210 | svn_fs_base__revision_prop(svn_string_t **value_p, |
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211 | svn_fs_t *fs, |
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212 | svn_revnum_t rev, |
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213 | const char *propname, |
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214 | apr_pool_t *pool) |
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215 | { |
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216 | struct revision_proplist_args args; |
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217 | apr_hash_t *table; |
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218 | |
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219 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
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220 | |
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221 | /* Get the proplist. */ |
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222 | args.table_p = &table; |
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223 | args.rev = rev; |
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224 | SVN_ERR(svn_fs_base__retry_txn(fs, txn_body_revision_proplist, &args, |
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225 | FALSE, pool)); |
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226 | |
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227 | /* And then the prop from that list (if there was a list). */ |
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228 | *value_p = NULL; |
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229 | if (table) |
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230 | *value_p = apr_hash_get(table, propname, APR_HASH_KEY_STRING); |
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231 | |
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232 | return SVN_NO_ERROR; |
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233 | } |
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234 | |
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235 | |
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236 | svn_error_t * |
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237 | svn_fs_base__set_rev_prop(svn_fs_t *fs, |
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238 | svn_revnum_t rev, |
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239 | const char *name, |
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240 | const svn_string_t *value, |
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241 | trail_t *trail, |
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242 | apr_pool_t *pool) |
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243 | { |
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244 | transaction_t *txn; |
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245 | const char *txn_id; |
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246 | |
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247 | SVN_ERR(get_rev_txn(&txn, &txn_id, fs, rev, trail, pool)); |
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248 | |
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249 | /* If there's no proplist, but we're just deleting a property, exit now. */ |
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250 | if ((! txn->proplist) && (! value)) |
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251 | return SVN_NO_ERROR; |
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252 | |
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253 | /* Now, if there's no proplist, we know we need to make one. */ |
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254 | if (! txn->proplist) |
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255 | txn->proplist = apr_hash_make(pool); |
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256 | |
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257 | /* Set the property. */ |
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258 | apr_hash_set(txn->proplist, name, APR_HASH_KEY_STRING, value); |
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259 | |
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260 | /* Overwrite the revision. */ |
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261 | return put_txn(fs, txn, txn_id, trail, pool); |
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262 | } |
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263 | |
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264 | |
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265 | struct change_rev_prop_args { |
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266 | svn_revnum_t rev; |
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267 | const char *name; |
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268 | const svn_string_t *value; |
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269 | }; |
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270 | |
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271 | |
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272 | static svn_error_t * |
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273 | txn_body_change_rev_prop(void *baton, trail_t *trail) |
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274 | { |
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275 | struct change_rev_prop_args *args = baton; |
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276 | |
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277 | return svn_fs_base__set_rev_prop(trail->fs, args->rev, |
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278 | args->name, args->value, |
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279 | trail, trail->pool); |
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280 | } |
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281 | |
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282 | |
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283 | svn_error_t * |
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284 | svn_fs_base__change_rev_prop(svn_fs_t *fs, |
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285 | svn_revnum_t rev, |
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286 | const char *name, |
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287 | const svn_string_t *value, |
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288 | apr_pool_t *pool) |
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289 | { |
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290 | struct change_rev_prop_args args; |
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291 | |
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292 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
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293 | |
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294 | args.rev = rev; |
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295 | args.name = name; |
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296 | args.value = value; |
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297 | return svn_fs_base__retry_txn(fs, txn_body_change_rev_prop, &args, |
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298 | TRUE, pool); |
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299 | } |
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300 | |
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301 | |
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302 | |
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303 | /*** Transactions ***/ |
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304 | |
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305 | svn_error_t * |
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306 | svn_fs_base__txn_make_committed(svn_fs_t *fs, |
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307 | const char *txn_name, |
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308 | svn_revnum_t revision, |
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309 | trail_t *trail, |
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310 | apr_pool_t *pool) |
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311 | { |
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312 | transaction_t *txn; |
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313 | |
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314 | SVN_ERR_ASSERT(SVN_IS_VALID_REVNUM(revision)); |
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315 | |
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316 | /* Make sure the TXN is not committed already. */ |
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317 | SVN_ERR(get_txn(&txn, fs, txn_name, FALSE, trail, pool)); |
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318 | if (txn->kind != transaction_kind_normal) |
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319 | return svn_fs_base__err_txn_not_mutable(fs, txn_name); |
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320 | |
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321 | /* Convert TXN to a committed transaction. */ |
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322 | txn->base_id = NULL; |
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323 | txn->revision = revision; |
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324 | txn->kind = transaction_kind_committed; |
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325 | return put_txn(fs, txn, txn_name, trail, pool); |
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326 | } |
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327 | |
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328 | |
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329 | svn_error_t * |
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330 | svn_fs_base__txn_get_revision(svn_revnum_t *revision, |
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331 | svn_fs_t *fs, |
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332 | const char *txn_name, |
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333 | trail_t *trail, |
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334 | apr_pool_t *pool) |
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335 | { |
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336 | transaction_t *txn; |
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337 | SVN_ERR(get_txn(&txn, fs, txn_name, FALSE, trail, pool)); |
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338 | *revision = txn->revision; |
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339 | return SVN_NO_ERROR; |
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340 | } |
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341 | |
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342 | |
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343 | svn_error_t * |
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344 | svn_fs_base__get_txn_ids(const svn_fs_id_t **root_id_p, |
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345 | const svn_fs_id_t **base_root_id_p, |
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346 | svn_fs_t *fs, |
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347 | const char *txn_name, |
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348 | trail_t *trail, |
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349 | apr_pool_t *pool) |
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350 | { |
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351 | transaction_t *txn; |
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352 | |
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353 | SVN_ERR(get_txn(&txn, fs, txn_name, FALSE, trail, pool)); |
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354 | if (txn->kind != transaction_kind_normal) |
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355 | return svn_fs_base__err_txn_not_mutable(fs, txn_name); |
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356 | |
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357 | *root_id_p = txn->root_id; |
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358 | *base_root_id_p = txn->base_id; |
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359 | return SVN_NO_ERROR; |
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360 | } |
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361 | |
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362 | |
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363 | svn_error_t * |
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364 | svn_fs_base__set_txn_root(svn_fs_t *fs, |
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365 | const char *txn_name, |
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366 | const svn_fs_id_t *new_id, |
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367 | trail_t *trail, |
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368 | apr_pool_t *pool) |
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369 | { |
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370 | transaction_t *txn; |
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371 | |
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372 | SVN_ERR(get_txn(&txn, fs, txn_name, FALSE, trail, pool)); |
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373 | if (txn->kind != transaction_kind_normal) |
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374 | return svn_fs_base__err_txn_not_mutable(fs, txn_name); |
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375 | |
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376 | if (! svn_fs_base__id_eq(txn->root_id, new_id)) |
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377 | { |
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378 | txn->root_id = new_id; |
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379 | SVN_ERR(put_txn(fs, txn, txn_name, trail, pool)); |
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380 | } |
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381 | return SVN_NO_ERROR; |
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382 | } |
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383 | |
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384 | |
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385 | svn_error_t * |
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386 | svn_fs_base__set_txn_base(svn_fs_t *fs, |
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387 | const char *txn_name, |
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388 | const svn_fs_id_t *new_id, |
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389 | trail_t *trail, |
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390 | apr_pool_t *pool) |
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391 | { |
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392 | transaction_t *txn; |
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393 | |
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394 | SVN_ERR(get_txn(&txn, fs, txn_name, FALSE, trail, pool)); |
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395 | if (txn->kind != transaction_kind_normal) |
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396 | return svn_fs_base__err_txn_not_mutable(fs, txn_name); |
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397 | |
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398 | if (! svn_fs_base__id_eq(txn->base_id, new_id)) |
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399 | { |
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400 | txn->base_id = new_id; |
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401 | SVN_ERR(put_txn(fs, txn, txn_name, trail, pool)); |
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402 | } |
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403 | return SVN_NO_ERROR; |
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404 | } |
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405 | |
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406 | |
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407 | svn_error_t * |
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408 | svn_fs_base__add_txn_copy(svn_fs_t *fs, |
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409 | const char *txn_name, |
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410 | const char *copy_id, |
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411 | trail_t *trail, |
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412 | apr_pool_t *pool) |
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413 | { |
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414 | transaction_t *txn; |
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415 | |
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416 | /* Get the transaction and ensure its mutability. */ |
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417 | SVN_ERR(get_txn(&txn, fs, txn_name, FALSE, trail, pool)); |
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418 | if (txn->kind != transaction_kind_normal) |
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419 | return svn_fs_base__err_txn_not_mutable(fs, txn_name); |
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420 | |
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421 | /* Allocate a new array if this transaction has no copies. */ |
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422 | if (! txn->copies) |
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423 | txn->copies = apr_array_make(pool, 1, sizeof(copy_id)); |
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424 | |
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425 | /* Add COPY_ID to the array. */ |
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426 | APR_ARRAY_PUSH(txn->copies, const char *) = copy_id; |
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427 | |
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428 | /* Finally, write out the transaction. */ |
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429 | return put_txn(fs, txn, txn_name, trail, pool); |
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430 | } |
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431 | |
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432 | |
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433 | |
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434 | /* Generic transaction operations. */ |
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435 | |
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436 | struct txn_proplist_args { |
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437 | apr_hash_t **table_p; |
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438 | const char *id; |
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439 | }; |
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440 | |
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441 | |
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442 | static svn_error_t * |
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443 | txn_body_txn_proplist(void *baton, trail_t *trail) |
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444 | { |
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445 | transaction_t *txn; |
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446 | struct txn_proplist_args *args = baton; |
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447 | |
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448 | SVN_ERR(get_txn(&txn, trail->fs, args->id, FALSE, trail, trail->pool)); |
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449 | if (txn->kind != transaction_kind_normal) |
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450 | return svn_fs_base__err_txn_not_mutable(trail->fs, args->id); |
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451 | |
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452 | *(args->table_p) = txn->proplist; |
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453 | return SVN_NO_ERROR; |
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454 | } |
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455 | |
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456 | |
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457 | |
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458 | svn_error_t * |
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459 | svn_fs_base__txn_proplist_in_trail(apr_hash_t **table_p, |
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460 | const char *txn_id, |
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461 | trail_t *trail) |
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462 | { |
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463 | struct txn_proplist_args args; |
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464 | apr_hash_t *table; |
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465 | |
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466 | args.table_p = &table; |
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467 | args.id = txn_id; |
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468 | SVN_ERR(txn_body_txn_proplist(&args, trail)); |
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469 | |
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470 | *table_p = table ? table : apr_hash_make(trail->pool); |
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471 | return SVN_NO_ERROR; |
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472 | } |
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473 | |
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474 | |
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475 | |
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476 | svn_error_t * |
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477 | svn_fs_base__txn_proplist(apr_hash_t **table_p, |
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478 | svn_fs_txn_t *txn, |
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479 | apr_pool_t *pool) |
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480 | { |
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481 | struct txn_proplist_args args; |
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482 | apr_hash_t *table; |
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483 | svn_fs_t *fs = txn->fs; |
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484 | |
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485 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
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486 | |
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487 | args.table_p = &table; |
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488 | args.id = txn->id; |
---|
489 | SVN_ERR(svn_fs_base__retry_txn(fs, txn_body_txn_proplist, &args, |
---|
490 | FALSE, pool)); |
---|
491 | |
---|
492 | *table_p = table ? table : apr_hash_make(pool); |
---|
493 | return SVN_NO_ERROR; |
---|
494 | } |
---|
495 | |
---|
496 | |
---|
497 | svn_error_t * |
---|
498 | svn_fs_base__txn_prop(svn_string_t **value_p, |
---|
499 | svn_fs_txn_t *txn, |
---|
500 | const char *propname, |
---|
501 | apr_pool_t *pool) |
---|
502 | { |
---|
503 | struct txn_proplist_args args; |
---|
504 | apr_hash_t *table; |
---|
505 | svn_fs_t *fs = txn->fs; |
---|
506 | |
---|
507 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
---|
508 | |
---|
509 | /* Get the proplist. */ |
---|
510 | args.table_p = &table; |
---|
511 | args.id = txn->id; |
---|
512 | SVN_ERR(svn_fs_base__retry_txn(fs, txn_body_txn_proplist, &args, |
---|
513 | FALSE, pool)); |
---|
514 | |
---|
515 | /* And then the prop from that list (if there was a list). */ |
---|
516 | *value_p = NULL; |
---|
517 | if (table) |
---|
518 | *value_p = apr_hash_get(table, propname, APR_HASH_KEY_STRING); |
---|
519 | return SVN_NO_ERROR; |
---|
520 | } |
---|
521 | |
---|
522 | |
---|
523 | |
---|
524 | struct change_txn_prop_args { |
---|
525 | svn_fs_t *fs; |
---|
526 | const char *id; |
---|
527 | const char *name; |
---|
528 | const svn_string_t *value; |
---|
529 | }; |
---|
530 | |
---|
531 | |
---|
532 | svn_error_t * |
---|
533 | svn_fs_base__set_txn_prop(svn_fs_t *fs, |
---|
534 | const char *txn_name, |
---|
535 | const char *name, |
---|
536 | const svn_string_t *value, |
---|
537 | trail_t *trail, |
---|
538 | apr_pool_t *pool) |
---|
539 | { |
---|
540 | transaction_t *txn; |
---|
541 | |
---|
542 | SVN_ERR(get_txn(&txn, fs, txn_name, FALSE, trail, pool)); |
---|
543 | if (txn->kind != transaction_kind_normal) |
---|
544 | return svn_fs_base__err_txn_not_mutable(fs, txn_name); |
---|
545 | |
---|
546 | /* If there's no proplist, but we're just deleting a property, exit now. */ |
---|
547 | if ((! txn->proplist) && (! value)) |
---|
548 | return SVN_NO_ERROR; |
---|
549 | |
---|
550 | /* Now, if there's no proplist, we know we need to make one. */ |
---|
551 | if (! txn->proplist) |
---|
552 | txn->proplist = apr_hash_make(pool); |
---|
553 | |
---|
554 | /* Set the property. */ |
---|
555 | apr_hash_set(txn->proplist, name, APR_HASH_KEY_STRING, value); |
---|
556 | |
---|
557 | /* Now overwrite the transaction. */ |
---|
558 | return put_txn(fs, txn, txn_name, trail, pool); |
---|
559 | } |
---|
560 | |
---|
561 | |
---|
562 | static svn_error_t * |
---|
563 | txn_body_change_txn_prop(void *baton, trail_t *trail) |
---|
564 | { |
---|
565 | struct change_txn_prop_args *args = baton; |
---|
566 | return svn_fs_base__set_txn_prop(trail->fs, args->id, args->name, |
---|
567 | args->value, trail, trail->pool); |
---|
568 | } |
---|
569 | |
---|
570 | |
---|
571 | svn_error_t * |
---|
572 | svn_fs_base__change_txn_prop(svn_fs_txn_t *txn, |
---|
573 | const char *name, |
---|
574 | const svn_string_t *value, |
---|
575 | apr_pool_t *pool) |
---|
576 | { |
---|
577 | struct change_txn_prop_args args; |
---|
578 | svn_fs_t *fs = txn->fs; |
---|
579 | |
---|
580 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
---|
581 | |
---|
582 | args.id = txn->id; |
---|
583 | args.name = name; |
---|
584 | args.value = value; |
---|
585 | return svn_fs_base__retry_txn(fs, txn_body_change_txn_prop, &args, |
---|
586 | TRUE, pool); |
---|
587 | } |
---|
588 | |
---|
589 | |
---|
590 | svn_error_t * |
---|
591 | svn_fs_base__change_txn_props(svn_fs_txn_t *txn, |
---|
592 | apr_array_header_t *props, |
---|
593 | apr_pool_t *pool) |
---|
594 | { |
---|
595 | apr_pool_t *iterpool = svn_pool_create(pool); |
---|
596 | int i; |
---|
597 | |
---|
598 | for (i = 0; i < props->nelts; i++) |
---|
599 | { |
---|
600 | svn_prop_t *prop = &APR_ARRAY_IDX(props, i, svn_prop_t); |
---|
601 | |
---|
602 | svn_pool_clear(iterpool); |
---|
603 | |
---|
604 | SVN_ERR(svn_fs_base__change_txn_prop(txn, prop->name, |
---|
605 | prop->value, iterpool)); |
---|
606 | } |
---|
607 | svn_pool_destroy(iterpool); |
---|
608 | |
---|
609 | return SVN_NO_ERROR; |
---|
610 | } |
---|
611 | |
---|
612 | |
---|
613 | /* Creating a transaction */ |
---|
614 | |
---|
615 | static txn_vtable_t txn_vtable = { |
---|
616 | svn_fs_base__commit_txn, |
---|
617 | svn_fs_base__abort_txn, |
---|
618 | svn_fs_base__txn_prop, |
---|
619 | svn_fs_base__txn_proplist, |
---|
620 | svn_fs_base__change_txn_prop, |
---|
621 | svn_fs_base__txn_root, |
---|
622 | svn_fs_base__change_txn_props |
---|
623 | }; |
---|
624 | |
---|
625 | |
---|
626 | /* Allocate and return a new transaction object in POOL for FS whose |
---|
627 | transaction ID is ID. ID is not copied. */ |
---|
628 | static svn_fs_txn_t * |
---|
629 | make_txn(svn_fs_t *fs, |
---|
630 | const char *id, |
---|
631 | svn_revnum_t base_rev, |
---|
632 | apr_pool_t *pool) |
---|
633 | { |
---|
634 | svn_fs_txn_t *txn = apr_pcalloc(pool, sizeof(*txn)); |
---|
635 | |
---|
636 | txn->fs = fs; |
---|
637 | txn->id = id; |
---|
638 | txn->base_rev = base_rev; |
---|
639 | txn->vtable = &txn_vtable; |
---|
640 | txn->fsap_data = NULL; |
---|
641 | |
---|
642 | return txn; |
---|
643 | } |
---|
644 | |
---|
645 | |
---|
646 | struct begin_txn_args |
---|
647 | { |
---|
648 | svn_fs_txn_t **txn_p; |
---|
649 | svn_revnum_t rev; |
---|
650 | apr_uint32_t flags; |
---|
651 | }; |
---|
652 | |
---|
653 | |
---|
654 | static svn_error_t * |
---|
655 | txn_body_begin_txn(void *baton, trail_t *trail) |
---|
656 | { |
---|
657 | struct begin_txn_args *args = baton; |
---|
658 | const svn_fs_id_t *root_id; |
---|
659 | const char *txn_id; |
---|
660 | |
---|
661 | SVN_ERR(svn_fs_base__rev_get_root(&root_id, trail->fs, args->rev, |
---|
662 | trail, trail->pool)); |
---|
663 | SVN_ERR(svn_fs_bdb__create_txn(&txn_id, trail->fs, root_id, |
---|
664 | trail, trail->pool)); |
---|
665 | |
---|
666 | if (args->flags & SVN_FS_TXN_CHECK_OOD) |
---|
667 | { |
---|
668 | struct change_txn_prop_args cpargs; |
---|
669 | cpargs.fs = trail->fs; |
---|
670 | cpargs.id = txn_id; |
---|
671 | cpargs.name = SVN_FS__PROP_TXN_CHECK_OOD; |
---|
672 | cpargs.value = svn_string_create("true", trail->pool); |
---|
673 | |
---|
674 | SVN_ERR(txn_body_change_txn_prop(&cpargs, trail)); |
---|
675 | } |
---|
676 | |
---|
677 | if (args->flags & SVN_FS_TXN_CHECK_LOCKS) |
---|
678 | { |
---|
679 | struct change_txn_prop_args cpargs; |
---|
680 | cpargs.fs = trail->fs; |
---|
681 | cpargs.id = txn_id; |
---|
682 | cpargs.name = SVN_FS__PROP_TXN_CHECK_LOCKS; |
---|
683 | cpargs.value = svn_string_create("true", trail->pool); |
---|
684 | |
---|
685 | SVN_ERR(txn_body_change_txn_prop(&cpargs, trail)); |
---|
686 | } |
---|
687 | |
---|
688 | *args->txn_p = make_txn(trail->fs, txn_id, args->rev, trail->pool); |
---|
689 | return SVN_NO_ERROR; |
---|
690 | } |
---|
691 | |
---|
692 | |
---|
693 | |
---|
694 | |
---|
695 | /* Note: it is acceptable for this function to call back into |
---|
696 | public FS API interfaces because it does not itself use trails. */ |
---|
697 | svn_error_t * |
---|
698 | svn_fs_base__begin_txn(svn_fs_txn_t **txn_p, |
---|
699 | svn_fs_t *fs, |
---|
700 | svn_revnum_t rev, |
---|
701 | apr_uint32_t flags, |
---|
702 | apr_pool_t *pool) |
---|
703 | { |
---|
704 | svn_fs_txn_t *txn; |
---|
705 | struct begin_txn_args args; |
---|
706 | svn_string_t date; |
---|
707 | |
---|
708 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
---|
709 | |
---|
710 | args.txn_p = &txn; |
---|
711 | args.rev = rev; |
---|
712 | args.flags = flags; |
---|
713 | SVN_ERR(svn_fs_base__retry_txn(fs, txn_body_begin_txn, &args, FALSE, pool)); |
---|
714 | |
---|
715 | *txn_p = txn; |
---|
716 | |
---|
717 | /* Put a datestamp on the newly created txn, so we always know |
---|
718 | exactly how old it is. (This will help sysadmins identify |
---|
719 | long-abandoned txns that may need to be manually removed.) When |
---|
720 | a txn is promoted to a revision, this property will be |
---|
721 | automatically overwritten with a revision datestamp. */ |
---|
722 | date.data = svn_time_to_cstring(apr_time_now(), pool); |
---|
723 | date.len = strlen(date.data); |
---|
724 | return svn_fs_base__change_txn_prop(txn, SVN_PROP_REVISION_DATE, |
---|
725 | &date, pool); |
---|
726 | } |
---|
727 | |
---|
728 | |
---|
729 | struct open_txn_args |
---|
730 | { |
---|
731 | svn_fs_txn_t **txn_p; |
---|
732 | const char *name; |
---|
733 | }; |
---|
734 | |
---|
735 | |
---|
736 | static svn_error_t * |
---|
737 | txn_body_open_txn(void *baton, trail_t *trail) |
---|
738 | { |
---|
739 | struct open_txn_args *args = baton; |
---|
740 | transaction_t *fstxn; |
---|
741 | svn_revnum_t base_rev = SVN_INVALID_REVNUM; |
---|
742 | const char *txn_id; |
---|
743 | |
---|
744 | SVN_ERR(get_txn(&fstxn, trail->fs, args->name, FALSE, trail, trail->pool)); |
---|
745 | if (fstxn->kind != transaction_kind_committed) |
---|
746 | { |
---|
747 | txn_id = svn_fs_base__id_txn_id(fstxn->base_id); |
---|
748 | SVN_ERR(svn_fs_base__txn_get_revision(&base_rev, trail->fs, txn_id, |
---|
749 | trail, trail->pool)); |
---|
750 | } |
---|
751 | |
---|
752 | *args->txn_p = make_txn(trail->fs, args->name, base_rev, trail->pool); |
---|
753 | return SVN_NO_ERROR; |
---|
754 | } |
---|
755 | |
---|
756 | |
---|
757 | svn_error_t * |
---|
758 | svn_fs_base__open_txn(svn_fs_txn_t **txn_p, |
---|
759 | svn_fs_t *fs, |
---|
760 | const char *name, |
---|
761 | apr_pool_t *pool) |
---|
762 | { |
---|
763 | svn_fs_txn_t *txn; |
---|
764 | struct open_txn_args args; |
---|
765 | |
---|
766 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
---|
767 | |
---|
768 | args.txn_p = &txn; |
---|
769 | args.name = name; |
---|
770 | SVN_ERR(svn_fs_base__retry_txn(fs, txn_body_open_txn, &args, FALSE, pool)); |
---|
771 | |
---|
772 | *txn_p = txn; |
---|
773 | return SVN_NO_ERROR; |
---|
774 | } |
---|
775 | |
---|
776 | |
---|
777 | struct cleanup_txn_args |
---|
778 | { |
---|
779 | transaction_t **txn_p; |
---|
780 | const char *name; |
---|
781 | }; |
---|
782 | |
---|
783 | |
---|
784 | static svn_error_t * |
---|
785 | txn_body_cleanup_txn(void *baton, trail_t *trail) |
---|
786 | { |
---|
787 | struct cleanup_txn_args *args = baton; |
---|
788 | return get_txn(args->txn_p, trail->fs, args->name, TRUE, |
---|
789 | trail, trail->pool); |
---|
790 | } |
---|
791 | |
---|
792 | |
---|
793 | static svn_error_t * |
---|
794 | txn_body_cleanup_txn_copy(void *baton, trail_t *trail) |
---|
795 | { |
---|
796 | svn_error_t *err = svn_fs_bdb__delete_copy(trail->fs, baton, trail, |
---|
797 | trail->pool); |
---|
798 | |
---|
799 | /* Copy doesn't exist? No sweat. */ |
---|
800 | if (err && (err->apr_err == SVN_ERR_FS_NO_SUCH_COPY)) |
---|
801 | { |
---|
802 | svn_error_clear(err); |
---|
803 | err = SVN_NO_ERROR; |
---|
804 | } |
---|
805 | return err; |
---|
806 | } |
---|
807 | |
---|
808 | |
---|
809 | static svn_error_t * |
---|
810 | txn_body_cleanup_txn_changes(void *baton, trail_t *trail) |
---|
811 | { |
---|
812 | return svn_fs_bdb__changes_delete(trail->fs, baton, trail, trail->pool); |
---|
813 | } |
---|
814 | |
---|
815 | |
---|
816 | struct get_dirents_args |
---|
817 | { |
---|
818 | apr_hash_t **dirents; |
---|
819 | const svn_fs_id_t *id; |
---|
820 | const char *txn_id; |
---|
821 | }; |
---|
822 | |
---|
823 | |
---|
824 | static svn_error_t * |
---|
825 | txn_body_get_dirents(void *baton, trail_t *trail) |
---|
826 | { |
---|
827 | struct get_dirents_args *args = baton; |
---|
828 | dag_node_t *node; |
---|
829 | |
---|
830 | /* Get the node. */ |
---|
831 | SVN_ERR(svn_fs_base__dag_get_node(&node, trail->fs, args->id, |
---|
832 | trail, trail->pool)); |
---|
833 | |
---|
834 | /* If immutable, do nothing and return. */ |
---|
835 | if (! svn_fs_base__dag_check_mutable(node, args->txn_id)) |
---|
836 | return SVN_NO_ERROR; |
---|
837 | |
---|
838 | /* If a directory, do nothing and return. */ |
---|
839 | *(args->dirents) = NULL; |
---|
840 | if (svn_fs_base__dag_node_kind(node) != svn_node_dir) |
---|
841 | return SVN_NO_ERROR; |
---|
842 | |
---|
843 | /* Else it's mutable. Get its dirents. */ |
---|
844 | return svn_fs_base__dag_dir_entries(args->dirents, node, |
---|
845 | trail, trail->pool); |
---|
846 | } |
---|
847 | |
---|
848 | |
---|
849 | struct remove_node_args |
---|
850 | { |
---|
851 | const svn_fs_id_t *id; |
---|
852 | const char *txn_id; |
---|
853 | }; |
---|
854 | |
---|
855 | |
---|
856 | static svn_error_t * |
---|
857 | txn_body_remove_node(void *baton, trail_t *trail) |
---|
858 | { |
---|
859 | struct remove_node_args *args = baton; |
---|
860 | return svn_fs_base__dag_remove_node(trail->fs, args->id, args->txn_id, |
---|
861 | trail, trail->pool); |
---|
862 | } |
---|
863 | |
---|
864 | |
---|
865 | static svn_error_t * |
---|
866 | delete_txn_tree(svn_fs_t *fs, |
---|
867 | const svn_fs_id_t *id, |
---|
868 | const char *txn_id, |
---|
869 | apr_pool_t *pool) |
---|
870 | { |
---|
871 | struct get_dirents_args dirent_args; |
---|
872 | struct remove_node_args rm_args; |
---|
873 | apr_hash_t *dirents = NULL; |
---|
874 | apr_hash_index_t *hi; |
---|
875 | svn_error_t *err; |
---|
876 | |
---|
877 | /* If this sucker isn't mutable, there's nothing to do. */ |
---|
878 | if (svn_fs_base__key_compare(svn_fs_base__id_txn_id(id), txn_id) != 0) |
---|
879 | return SVN_NO_ERROR; |
---|
880 | |
---|
881 | /* See if the thing has dirents that need to be recursed upon. If |
---|
882 | you can't find the thing itself, don't sweat it. We probably |
---|
883 | already cleaned it up. */ |
---|
884 | dirent_args.dirents = &dirents; |
---|
885 | dirent_args.id = id; |
---|
886 | dirent_args.txn_id = txn_id; |
---|
887 | err = svn_fs_base__retry_txn(fs, txn_body_get_dirents, &dirent_args, |
---|
888 | FALSE, pool); |
---|
889 | if (err && (err->apr_err == SVN_ERR_FS_ID_NOT_FOUND)) |
---|
890 | { |
---|
891 | svn_error_clear(err); |
---|
892 | return SVN_NO_ERROR; |
---|
893 | } |
---|
894 | SVN_ERR(err); |
---|
895 | |
---|
896 | /* If there are dirents upon which to recurse ... recurse. */ |
---|
897 | if (dirents) |
---|
898 | { |
---|
899 | apr_pool_t *subpool = svn_pool_create(pool); |
---|
900 | |
---|
901 | /* Loop over hash entries */ |
---|
902 | for (hi = apr_hash_first(pool, dirents); hi; hi = apr_hash_next(hi)) |
---|
903 | { |
---|
904 | void *val; |
---|
905 | svn_fs_dirent_t *dirent; |
---|
906 | |
---|
907 | svn_pool_clear(subpool); |
---|
908 | apr_hash_this(hi, NULL, NULL, &val); |
---|
909 | dirent = val; |
---|
910 | SVN_ERR(delete_txn_tree(fs, dirent->id, txn_id, subpool)); |
---|
911 | } |
---|
912 | svn_pool_destroy(subpool); |
---|
913 | } |
---|
914 | |
---|
915 | /* Remove the node. */ |
---|
916 | rm_args.id = id; |
---|
917 | rm_args.txn_id = txn_id; |
---|
918 | return svn_fs_base__retry_txn(fs, txn_body_remove_node, &rm_args, |
---|
919 | TRUE, pool); |
---|
920 | } |
---|
921 | |
---|
922 | |
---|
923 | static svn_error_t * |
---|
924 | txn_body_delete_txn(void *baton, trail_t *trail) |
---|
925 | { |
---|
926 | return svn_fs_bdb__delete_txn(trail->fs, baton, trail, trail->pool); |
---|
927 | } |
---|
928 | |
---|
929 | |
---|
930 | svn_error_t * |
---|
931 | svn_fs_base__purge_txn(svn_fs_t *fs, |
---|
932 | const char *txn_id, |
---|
933 | apr_pool_t *pool) |
---|
934 | { |
---|
935 | struct cleanup_txn_args args; |
---|
936 | transaction_t *txn; |
---|
937 | int i; |
---|
938 | |
---|
939 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
---|
940 | |
---|
941 | /* Open the transaction, expecting it to be dead. */ |
---|
942 | args.txn_p = &txn; |
---|
943 | args.name = txn_id; |
---|
944 | SVN_ERR(svn_fs_base__retry_txn(fs, txn_body_cleanup_txn, &args, |
---|
945 | FALSE, pool)); |
---|
946 | |
---|
947 | /* Delete the mutable portion of the tree hanging from the |
---|
948 | transaction (which should gracefully recover if we've already |
---|
949 | done this). */ |
---|
950 | SVN_ERR(delete_txn_tree(fs, txn->root_id, txn_id, pool)); |
---|
951 | |
---|
952 | /* Kill the transaction's changes (which should gracefully recover |
---|
953 | if...). */ |
---|
954 | SVN_ERR(svn_fs_base__retry_txn(fs, txn_body_cleanup_txn_changes, |
---|
955 | (void *)txn_id, TRUE, pool)); |
---|
956 | |
---|
957 | /* Kill the transaction's copies (which should gracefully...). */ |
---|
958 | if (txn->copies) |
---|
959 | { |
---|
960 | for (i = 0; i < txn->copies->nelts; i++) |
---|
961 | { |
---|
962 | SVN_ERR(svn_fs_base__retry_txn |
---|
963 | (fs, txn_body_cleanup_txn_copy, |
---|
964 | (void *)APR_ARRAY_IDX(txn->copies, i, const char *), |
---|
965 | TRUE, pool)); |
---|
966 | } |
---|
967 | } |
---|
968 | |
---|
969 | /* Kill the transaction itself (which ... just kidding -- this has |
---|
970 | no graceful failure mode). */ |
---|
971 | return svn_fs_base__retry_txn(fs, txn_body_delete_txn, (void *)txn_id, |
---|
972 | TRUE, pool); |
---|
973 | } |
---|
974 | |
---|
975 | |
---|
976 | static svn_error_t * |
---|
977 | txn_body_abort_txn(void *baton, trail_t *trail) |
---|
978 | { |
---|
979 | svn_fs_txn_t *txn = baton; |
---|
980 | transaction_t *fstxn; |
---|
981 | |
---|
982 | /* Get the transaction by its id, set it to "dead", and store the |
---|
983 | transaction. */ |
---|
984 | SVN_ERR(get_txn(&fstxn, txn->fs, txn->id, FALSE, trail, trail->pool)); |
---|
985 | if (fstxn->kind != transaction_kind_normal) |
---|
986 | return svn_fs_base__err_txn_not_mutable(txn->fs, txn->id); |
---|
987 | |
---|
988 | fstxn->kind = transaction_kind_dead; |
---|
989 | return put_txn(txn->fs, fstxn, txn->id, trail, trail->pool); |
---|
990 | } |
---|
991 | |
---|
992 | |
---|
993 | svn_error_t * |
---|
994 | svn_fs_base__abort_txn(svn_fs_txn_t *txn, |
---|
995 | apr_pool_t *pool) |
---|
996 | { |
---|
997 | SVN_ERR(svn_fs__check_fs(txn->fs, TRUE)); |
---|
998 | |
---|
999 | /* Set the transaction to "dead". */ |
---|
1000 | SVN_ERR(svn_fs_base__retry_txn(txn->fs, txn_body_abort_txn, txn, |
---|
1001 | TRUE, pool)); |
---|
1002 | |
---|
1003 | /* Now, purge it. */ |
---|
1004 | SVN_ERR_W(svn_fs_base__purge_txn(txn->fs, txn->id, pool), |
---|
1005 | _("Transaction aborted, but cleanup failed")); |
---|
1006 | |
---|
1007 | return SVN_NO_ERROR; |
---|
1008 | } |
---|
1009 | |
---|
1010 | |
---|
1011 | struct list_transactions_args |
---|
1012 | { |
---|
1013 | apr_array_header_t **names_p; |
---|
1014 | apr_pool_t *pool; |
---|
1015 | }; |
---|
1016 | |
---|
1017 | static svn_error_t * |
---|
1018 | txn_body_list_transactions(void* baton, trail_t *trail) |
---|
1019 | { |
---|
1020 | struct list_transactions_args *args = baton; |
---|
1021 | return svn_fs_bdb__get_txn_list(args->names_p, trail->fs, |
---|
1022 | trail, args->pool); |
---|
1023 | } |
---|
1024 | |
---|
1025 | svn_error_t * |
---|
1026 | svn_fs_base__list_transactions(apr_array_header_t **names_p, |
---|
1027 | svn_fs_t *fs, |
---|
1028 | apr_pool_t *pool) |
---|
1029 | { |
---|
1030 | apr_array_header_t *names; |
---|
1031 | struct list_transactions_args args; |
---|
1032 | |
---|
1033 | SVN_ERR(svn_fs__check_fs(fs, TRUE)); |
---|
1034 | |
---|
1035 | args.names_p = &names; |
---|
1036 | args.pool = pool; |
---|
1037 | SVN_ERR(svn_fs_base__retry(fs, txn_body_list_transactions, &args, |
---|
1038 | FALSE, pool)); |
---|
1039 | |
---|
1040 | *names_p = names; |
---|
1041 | return SVN_NO_ERROR; |
---|
1042 | } |
---|