Mercurial > dovecot > core-2.2

annotate src/lib-dict/dict-fs.c @ 17751:77e71a45a475

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lib-dict: Changed dict.init() API to take struct dict_settings and added dict_init_full(). This allows giving more settings to dict in future as needed. Unfortunately it also breaks the internal dict API, but there aren't really any plugins widely using it, so it's not a big problem.
author Timo Sirainen <tss@iki.fi>
date Thu, 28 Aug 2014 21:56:41 +0900
parents add8c00fb3cc
children 979e5a007248
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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add8c00fb3cc Updated copyright notices to include year 2014.
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diff changeset
1 /* Copyright (c) 2013-2014 Dovecot authors, see the included COPYING file */
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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 const struct dict_settings *set,
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20 struct dict **dict_r, const char **error_r)
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21 {
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22 struct fs_settings fs_set;
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23 struct fs *fs;
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24 struct fs_dict *dict;
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25 const char *p, *fs_driver, *fs_args;
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26
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27 p = strchr(uri, ':');
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28 if (p == NULL) {
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29 fs_driver = uri;
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30 fs_args = "";
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31 } else {
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32 fs_driver = t_strdup_until(uri, p);
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33 fs_args = p+1;
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34 }
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35
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36 memset(&fs_set, 0, sizeof(fs_set));
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37 fs_set.username = set->username;
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38 fs_set.base_dir = set->base_dir;
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39 if (fs_init(fs_driver, fs_args, &fs_set, &fs, error_r) < 0)
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40 return -1;
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41
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42 dict = i_new(struct fs_dict, 1);
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43 dict->dict = *driver;
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44 dict->fs = fs;
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45 dict->username = i_strdup(set->username);
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46
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47 *dict_r = &dict->dict;
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48 return 0;
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49 }
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50
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51 static void fs_dict_deinit(struct dict *_dict)
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52 {
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53 struct fs_dict *dict = (struct fs_dict *)_dict;
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54
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55 fs_deinit(&dict->fs);
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56 i_free(dict->username);
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57 i_free(dict);
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58 }
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59
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60 static const char *fs_dict_get_full_key(struct fs_dict *dict, const char *key)
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61 {
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62 if (strncmp(key, DICT_PATH_SHARED, strlen(DICT_PATH_SHARED)) == 0)
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63 return key + strlen(DICT_PATH_SHARED);
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64 else if (strncmp(key, DICT_PATH_PRIVATE, strlen(DICT_PATH_PRIVATE)) == 0) {
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65 return t_strdup_printf("%s/%s", dict->username,
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66 key + strlen(DICT_PATH_PRIVATE));
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67 } else {
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68 i_unreached();
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69 }
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70 }
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71
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72 static int fs_dict_lookup(struct dict *_dict, pool_t pool,
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73 const char *key, const char **value_r)
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74 {
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75 struct fs_dict *dict = (struct fs_dict *)_dict;
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76 struct fs_file *file;
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77 struct istream *input;
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78 const unsigned char *data;
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79 size_t size;
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80 string_t *str;
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81 int ret;
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82
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83 file = fs_file_init(dict->fs, fs_dict_get_full_key(dict, key),
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84 FS_OPEN_MODE_READONLY);
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85 input = fs_read_stream(file, IO_BLOCK_SIZE);
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86 i_stream_read(input);
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87
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88 str = str_new(pool, i_stream_get_data_size(input)+1);
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89 while ((ret = i_stream_read_data(input, &data, &size, 0)) > 0) {
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90 str_append_n(str, data, size);
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91 i_stream_skip(input, size);
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92 }
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93 i_assert(ret == -1);
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94
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95 if (input->stream_errno == 0) {
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96 *value_r = str_c(str);
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97 ret = 1;
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98 } else {
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99 *value_r = NULL;
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100 if (input->stream_errno == ENOENT)
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101 ret = 0;
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102 }
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103
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104 i_stream_unref(&input);
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105 fs_file_deinit(&file);
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106 return ret;
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107 }
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108
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109 static struct dict_transaction_context *
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110 fs_dict_transaction_init(struct dict *_dict)
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111 {
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112 struct dict_transaction_memory_context *ctx;
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113 pool_t pool;
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114
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115 pool = pool_alloconly_create("file dict transaction", 2048);
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116 ctx = p_new(pool, struct dict_transaction_memory_context, 1);
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117 dict_transaction_memory_init(ctx, _dict, pool);
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118 return &ctx->ctx;
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119 }
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120
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121 static int fs_dict_write_changes(struct dict_transaction_memory_context *ctx)
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122 {
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123 struct fs_dict *dict = (struct fs_dict *)ctx->ctx.dict;
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124 struct fs_file *file;
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125 const struct dict_transaction_memory_change *change;
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126 const char *key;
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127 int ret = 0;
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128
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129 array_foreach(&ctx->changes, change) {
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130 key = fs_dict_get_full_key(dict, change->key);
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131 switch (change->type) {
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132 case DICT_CHANGE_TYPE_SET:
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133 file = fs_file_init(dict->fs, key,
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134 FS_OPEN_MODE_REPLACE);
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135 if (fs_write(file, change->value.str, strlen(change->value.str)) < 0) {
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136 i_error("fs_write(%s) failed: %s", key,
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137 fs_file_last_error(file));
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138 ret = -1;
773e9ce608ed lib-dict: Added "fs" wrapper dict backend, which uses lib-fs.
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139 }
773e9ce608ed lib-dict: Added "fs" wrapper dict backend, which uses lib-fs.
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140 fs_file_deinit(&file);
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141 break;
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142 case DICT_CHANGE_TYPE_UNSET:
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143 file = fs_file_init(dict->fs, key, FS_OPEN_MODE_READONLY);
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144 if (fs_delete(file) < 0) {
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145 i_error("fs_delete(%s) failed: %s", key,
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146 fs_file_last_error(file));
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147 ret = -1;
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148 }
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149 fs_file_deinit(&file);
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150 break;
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151 case DICT_CHANGE_TYPE_APPEND:
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152 case DICT_CHANGE_TYPE_INC:
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153 i_unreached();
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154 }
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155 if (ret < 0)
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156 return -1;
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157 }
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158 return 0;
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159 }
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160
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161 static int
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162 fs_dict_transaction_commit(struct dict_transaction_context *_ctx,
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163 bool async ATTR_UNUSED,
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164 dict_transaction_commit_callback_t *callback,
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165 void *context)
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166 {
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167 struct dict_transaction_memory_context *ctx =
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168 (struct dict_transaction_memory_context *)_ctx;
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169 int ret;
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170
773e9ce608ed lib-dict: Added "fs" wrapper dict backend, which uses lib-fs.
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171 if (fs_dict_write_changes(ctx) < 0)
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172 ret = -1;
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173 else
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174 ret = 1;
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175 pool_unref(&ctx->pool);
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176
773e9ce608ed lib-dict: Added "fs" wrapper dict backend, which uses lib-fs.
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177 if (callback != NULL)
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178 callback(ret, context);
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179 return ret;
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180 }
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181
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182 struct dict dict_driver_fs = {
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183 .name = "fs",
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184 {
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185 fs_dict_init,
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186 fs_dict_deinit,
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187 NULL,
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188 fs_dict_lookup,
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189 NULL,
773e9ce608ed lib-dict: Added "fs" wrapper dict backend, which uses lib-fs.
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diff changeset
190 NULL,
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191 NULL,
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192 fs_dict_transaction_init,
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193 fs_dict_transaction_commit,
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194 dict_transaction_memory_rollback,
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Timo Sirainen <tss@iki.fi>
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195 dict_transaction_memory_set,
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diff changeset
196 dict_transaction_memory_unset,
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197 NULL,
773e9ce608ed lib-dict: Added "fs" wrapper dict backend, which uses lib-fs.
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198 NULL
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199 }
773e9ce608ed lib-dict: Added "fs" wrapper dict backend, which uses lib-fs.
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200 };