Mercurial > dovecot > core-2.2

annotate src/lib-dict/dict-fs.c @ 17130:add8c00fb3cc

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Updated copyright notices to include year 2014.
author Timo Sirainen <tss@iki.fi>
date Tue, 04 Feb 2014 16:23:22 -0500
parents 773e9ce608ed
children 77e71a45a475
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rev   line source
17130
add8c00fb3cc Updated copyright notices to include year 2014.
Timo Sirainen <tss@iki.fi>
parents: 17043
diff changeset
1 /* Copyright (c) 2013-2014 Dovecot authors, see the included COPYING file */
17043
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2
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3 #include "lib.h"
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4 #include "array.h"
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5 #include "fs-api.h"
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6 #include "istream.h"
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7 #include "str.h"
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8 #include "dict-transaction-memory.h"
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9 #include "dict-private.h"
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10
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11 struct fs_dict {
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12 struct dict dict;
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13 struct fs *fs;
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14 char *username;
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15 };
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16
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17 static int
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18 fs_dict_init(struct dict *driver, const char *uri,
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19 enum dict_data_type value_type ATTR_UNUSED,
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20 const char *username,
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21 const char *base_dir, struct dict **dict_r,
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22 const char **error_r)
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23 {
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24 struct fs_settings fs_set;
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25 struct fs *fs;
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26 struct fs_dict *dict;
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27 const char *p, *fs_driver, *fs_args;
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28
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29 p = strchr(uri, ':');
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30 if (p == NULL) {
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31 fs_driver = uri;
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32 fs_args = "";
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33 } else {
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34 fs_driver = t_strdup_until(uri, p);
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35 fs_args = p+1;
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36 }
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37
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38 memset(&fs_set, 0, sizeof(fs_set));
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39 fs_set.base_dir = base_dir;
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40 if (fs_init(fs_driver, fs_args, &fs_set, &fs, error_r) < 0)
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41 return -1;
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42
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43 dict = i_new(struct fs_dict, 1);
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44 dict->dict = *driver;
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45 dict->fs = fs;
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46 dict->username = i_strdup(username);
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47
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48 *dict_r = &dict->dict;
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49 return 0;
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50 }
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51
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52 static void fs_dict_deinit(struct dict *_dict)
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53 {
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54 struct fs_dict *dict = (struct fs_dict *)_dict;
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55
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56 fs_deinit(&dict->fs);
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57 i_free(dict->username);
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58 i_free(dict);
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59 }
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60
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61 static const char *fs_dict_get_full_key(struct fs_dict *dict, const char *key)
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62 {
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63 if (strncmp(key, DICT_PATH_SHARED, strlen(DICT_PATH_SHARED)) == 0)
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64 return key + strlen(DICT_PATH_SHARED);
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65 else if (strncmp(key, DICT_PATH_PRIVATE, strlen(DICT_PATH_PRIVATE)) == 0) {
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66 return t_strdup_printf("%s/%s", dict->username,
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67 key + strlen(DICT_PATH_PRIVATE));
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68 } else {
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69 i_unreached();
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70 }
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71 }
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72
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73 static int fs_dict_lookup(struct dict *_dict, pool_t pool,
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74 const char *key, const char **value_r)
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75 {
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76 struct fs_dict *dict = (struct fs_dict *)_dict;
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77 struct fs_file *file;
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78 struct istream *input;
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79 const unsigned char *data;
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80 size_t size;
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81 string_t *str;
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82 int ret;
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83
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84 file = fs_file_init(dict->fs, fs_dict_get_full_key(dict, key),
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85 FS_OPEN_MODE_READONLY);
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86 input = fs_read_stream(file, IO_BLOCK_SIZE);
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87 i_stream_read(input);
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88
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89 str = str_new(pool, i_stream_get_data_size(input)+1);
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90 while ((ret = i_stream_read_data(input, &data, &size, 0)) > 0) {
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91 str_append_n(str, data, size);
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92 i_stream_skip(input, size);
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93 }
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94 i_assert(ret == -1);
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95
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96 if (input->stream_errno == 0) {
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97 *value_r = str_c(str);
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98 ret = 1;
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99 } else {
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100 *value_r = NULL;
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101 if (input->stream_errno == ENOENT)
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102 ret = 0;
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103 }
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104
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105 i_stream_unref(&input);
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106 fs_file_deinit(&file);
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107 return ret;
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108 }
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109
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110 static struct dict_transaction_context *
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111 fs_dict_transaction_init(struct dict *_dict)
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112 {
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113 struct dict_transaction_memory_context *ctx;
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114 pool_t pool;
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115
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116 pool = pool_alloconly_create("file dict transaction", 2048);
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117 ctx = p_new(pool, struct dict_transaction_memory_context, 1);
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118 dict_transaction_memory_init(ctx, _dict, pool);
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119 return &ctx->ctx;
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120 }
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121
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122 static int fs_dict_write_changes(struct dict_transaction_memory_context *ctx)
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123 {
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124 struct fs_dict *dict = (struct fs_dict *)ctx->ctx.dict;
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125 struct fs_file *file;
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126 const struct dict_transaction_memory_change *change;
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127 const char *key;
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128 int ret = 0;
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129
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130 array_foreach(&ctx->changes, change) {
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131 key = fs_dict_get_full_key(dict, change->key);
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132 switch (change->type) {
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133 case DICT_CHANGE_TYPE_SET:
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134 file = fs_file_init(dict->fs, key,
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135 FS_OPEN_MODE_REPLACE);
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136 if (fs_write(file, change->value.str, strlen(change->value.str)) < 0) {
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137 i_error("fs_write(%s) failed: %s", key,
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138 fs_file_last_error(file));
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139 ret = -1;
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140 }
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141 fs_file_deinit(&file);
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142 break;
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143 case DICT_CHANGE_TYPE_UNSET:
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144 file = fs_file_init(dict->fs, key, FS_OPEN_MODE_READONLY);
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145 if (fs_delete(file) < 0) {
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146 i_error("fs_delete(%s) failed: %s", key,
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147 fs_file_last_error(file));
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148 ret = -1;
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149 }
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150 fs_file_deinit(&file);
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151 break;
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152 case DICT_CHANGE_TYPE_APPEND:
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153 case DICT_CHANGE_TYPE_INC:
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154 i_unreached();
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155 }
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156 if (ret < 0)
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157 return -1;
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158 }
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159 return 0;
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160 }
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161
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162 static int
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163 fs_dict_transaction_commit(struct dict_transaction_context *_ctx,
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164 bool async ATTR_UNUSED,
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165 dict_transaction_commit_callback_t *callback,
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166 void *context)
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167 {
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168 struct dict_transaction_memory_context *ctx =
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169 (struct dict_transaction_memory_context *)_ctx;
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170 int ret;
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171
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172 if (fs_dict_write_changes(ctx) < 0)
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173 ret = -1;
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174 else
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175 ret = 1;
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176 pool_unref(&ctx->pool);
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177
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178 if (callback != NULL)
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179 callback(ret, context);
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180 return ret;
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181 }
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182
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183 struct dict dict_driver_fs = {
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184 .name = "fs",
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185 {
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186 fs_dict_init,
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187 fs_dict_deinit,
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188 NULL,
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189 fs_dict_lookup,
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190 NULL,
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191 NULL,
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192 NULL,
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193 fs_dict_transaction_init,
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194 fs_dict_transaction_commit,
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195 dict_transaction_memory_rollback,
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196 dict_transaction_memory_set,
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197 dict_transaction_memory_unset,
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198 NULL,
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199 NULL
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200 }
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201 };