Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/plugins/quota/quota-dirsize.c @ 4330:823648215520 HEAD

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If size of the mail was known before saving started, we allocated the quota twice for it.
author Timo Sirainen <timo.sirainen@movial.fi>
date Sun, 11 Jun 2006 20:39:04 +0300
parents 85efed60baef
children 1a35d53c18fc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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51306837698b Quota API redesign. Still not perfect, but better than before. Quota backends no longer need to be told where the mails exist. fs backend doesn't work correctly with multiple partitions (if you've multiple namespaces).
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parents: 4044
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1 /* Copyright (C) 2005-2006 Timo Sirainen */
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2
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3 /* Quota reporting based on simply summing sizes of all files in mailbox
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4 together. */
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5
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6 #include "lib.h"
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7 #include "array.h"
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8 #include "str.h"
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9 #include "quota-private.h"
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10
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11 #include <stdlib.h>
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12 #include <unistd.h>
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13 #include <dirent.h>
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14 #include <sys/stat.h>
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15
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16 struct dirsize_quota_root {
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17 struct quota_root root;
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18
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19 uint64_t storage_limit;
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20 };
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21
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22 extern struct quota_backend quota_backend_dirsize;
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23
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24 static struct quota_root *
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25 dirsize_quota_init(struct quota_setup *setup, const char *name)
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26 {
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27 struct dirsize_quota_root *root;
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28 const char *const *args;
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29
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30 root = i_new(struct dirsize_quota_root, 1);
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31 root->root.name = i_strdup(name);
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32 root->root.v = quota_backend_dirsize.v;
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33
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34 t_push();
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35 args = t_strsplit(setup->data, ":");
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36
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37 for (; *args != '\0'; args++) {
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38 if (strncmp(*args, "storage=", 8) == 0)
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39 root->storage_limit = strtoull(*args + 8, NULL, 10);
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40 }
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41 t_pop();
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42
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43 if (getenv("DEBUG") != NULL) {
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44 i_info("dirsize quota limit = %llukB",
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45 (unsigned long long)root->storage_limit);
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46 }
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47
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48 return &root->root;
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49 }
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50
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51 static void dirsize_quota_deinit(struct quota_root *_root)
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52 {
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53 struct dirsize_quota_root *root = (struct dirsize_quota_root *)_root;
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54
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55 i_free(root->root.name);
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56 i_free(root);
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57 }
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58
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59 static bool
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60 dirsize_quota_add_storage(struct quota_root *root __attr_unused__,
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61 struct mail_storage *storage __attr_unused__)
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62 {
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63 return TRUE;
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64 }
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65
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66 static void
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67 dirsize_quota_remove_storage(struct quota_root *root __attr_unused__,
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68 struct mail_storage *storage __attr_unused__)
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69 {
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70 }
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71
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72 static const char *const *
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73 dirsize_quota_root_get_resources(struct quota_root *root __attr_unused__)
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74 {
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75 static const char *resources[] = { QUOTA_NAME_STORAGE, NULL };
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76
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77 return resources;
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78 }
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79
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80 static int get_dir_usage(const char *dir, uint64_t *value)
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81 {
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82 DIR *dirp;
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83 string_t *path;
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84 struct dirent *d;
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85 struct stat st;
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86 unsigned int path_pos;
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87 int ret;
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88
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89 dirp = opendir(dir);
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90 if (dirp == NULL) {
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91 if (errno == ENOENT)
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92 return 0;
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93
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94 i_error("opendir(%s) failed: %m", dir);
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95 return -1;
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96 }
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97
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98 path = t_str_new(128);
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99 str_append(path, dir);
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100 str_append_c(path, '/');
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101 path_pos = str_len(path);
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102
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103 ret = 0;
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104 while ((d = readdir(dirp)) != NULL) {
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105 if (d->d_name[0] == '.' &&
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106 (d->d_name[1] == '\0' ||
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107 (d->d_name[1] == '.' && d->d_name[2] == '\0'))) {
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108 /* skip . and .. */
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109 continue;
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110 }
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111
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112 str_truncate(path, path_pos);
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113 str_append(path, d->d_name);
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114
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115 if (lstat(str_c(path), &st) < 0) {
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116 if (errno == ENOENT)
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117 continue;
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118
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119 i_error("lstat(%s) failed: %m", dir);
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120 ret = -1;
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121 break;
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122 } else if (S_ISDIR(st.st_mode)) {
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123 if (get_dir_usage(str_c(path), value) < 0) {
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124 ret = -1;
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125 break;
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126 }
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127 } else {
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128 *value += st.st_size;
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129 }
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130 }
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131
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132 (void)closedir(dirp);
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133 return ret;
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134 }
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135
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136 static int get_usage(struct dirsize_quota_root *root,
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137 const char *path, bool is_file, uint64_t *value_r)
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138 {
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139 struct stat st;
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140
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141 if (is_file) {
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142 if (lstat(path, &st) < 0) {
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143 if (errno == ENOENT)
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144 return 0;
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145
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146 i_error("lstat(%s) failed: %m", path);
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147 return -1;
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148 }
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149 *value_r += st.st_size;
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150 } else {
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151 if (get_dir_usage(path, value_r) < 0) {
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152 quota_set_error(root->root.setup->quota,
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153 "Internal quota calculation error");
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154 return -1;
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155 }
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156 }
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157 return 0;
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158 }
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159
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160 struct quota_count_path {
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161 const char *path;
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162 bool is_file;
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163 };
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164
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165 static void quota_count_path_add(array_t *paths, const char *path, bool is_file)
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166 {
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167 ARRAY_SET_TYPE(paths, struct quota_count_path);
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168 struct quota_count_path *count_path;
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169 unsigned int i, count;
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170
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171 count_path = array_get_modifyable(paths, &count);
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172 for (i = 0; i < count; i++) {
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173 if (strncmp(count_path[i].path, path,
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174 strlen(count_path[i].path)) == 0) {
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175 /* this path is already being counted */
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176 return;
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177 }
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178 if (strncmp(count_path[i].path, path, strlen(path)) == 0) {
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179 /* the new path contains the existing path */
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180 i_assert(!is_file);
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181 count_path += i;
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182 break;
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183 }
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184 }
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185
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186 if (i == count)
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187 count_path = array_append_space(paths);
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188 count_path->path = t_strdup(path);
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189 count_path->is_file = is_file;
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190 }
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191
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192 static int
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193 get_quota_root_usage(struct dirsize_quota_root *root, uint64_t *value_r)
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194 {
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195 struct mail_storage *const *storages;
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196 array_t ARRAY_DEFINE(paths, struct quota_count_path);
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197 const struct quota_count_path *count_paths;
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198 unsigned int i, count;
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199 const char *path;
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200 bool is_file;
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201
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202 t_push();
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203 ARRAY_CREATE(&paths, pool_datastack_create(),
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204 struct quota_count_path, 8);
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205 storages = array_get(&root->root.storages, &count);
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206 for (i = 0; i < count; i++) {
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diff changeset
207 path = mail_storage_get_mailbox_path(storages[i], "", &is_file);
4182
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diff changeset
208 quota_count_path_add(&paths, path, is_file);
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209
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diff changeset
210 /* INBOX may be in different path. */
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diff changeset
211 path = mail_storage_get_mailbox_path(storages[i], "INBOX",
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diff changeset
212 &is_file);
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diff changeset
213 quota_count_path_add(&paths, path, is_file);
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diff changeset
214 }
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diff changeset
215
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diff changeset
216 /* now sum up the found paths */
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diff changeset
217 count_paths = array_get(&paths, &count);
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diff changeset
218 for (i = 0; i < count; i++) {
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diff changeset
219 if (get_usage(root, count_paths[i].path, count_paths[i].is_file,
85efed60baef When using multiple namespaces, don't count each of them if they're using
Timo Sirainen <tss@iki.fi>
parents: 4181
diff changeset
220 value_r) < 0) {
85efed60baef When using multiple namespaces, don't count each of them if they're using
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parents: 4181
diff changeset
221 t_pop();
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diff changeset
222 return -1;
4084
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223 }
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diff changeset
224 }
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diff changeset
225
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diff changeset
226 t_pop();
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diff changeset
227
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diff changeset
228 return 0;
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229 }
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diff changeset
230
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diff changeset
231 static int
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diff changeset
232 dirsize_quota_get_resource(struct quota_root *_root, const char *name,
3738
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diff changeset
233 uint64_t *value_r, uint64_t *limit_r)
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diff changeset
234 {
4084
51306837698b Quota API redesign. Still not perfect, but better than before. Quota backends no longer need to be told where the mails exist. fs backend doesn't work correctly with multiple partitions (if you've multiple namespaces).
Timo Sirainen <timo.sirainen@movial.fi>
parents: 4044
diff changeset
235 struct dirsize_quota_root *root = (struct dirsize_quota_root *)_root;
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parents:
diff changeset
236
732b62dc1976 Added beginnings of plugin infrastructure. TODO: These could be optionally
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diff changeset
237 *value_r = 0;
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parents:
diff changeset
238 *limit_r = 0;
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parents:
diff changeset
239
732b62dc1976 Added beginnings of plugin infrastructure. TODO: These could be optionally
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parents:
diff changeset
240 if (strcasecmp(name, QUOTA_NAME_STORAGE) != 0)
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diff changeset
241 return 0;
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parents:
diff changeset
242
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diff changeset
243 if (get_quota_root_usage(root, value_r) < 0)
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parents:
diff changeset
244 return -1;
4084
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diff changeset
245
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diff changeset
246 *value_r /= 1024;
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diff changeset
247 *limit_r = root->storage_limit;
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248 return 1;
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diff changeset
249 }
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diff changeset
250
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parents:
diff changeset
251 static int
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parents:
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252 dirsize_quota_set_resource(struct quota_root *root,
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253 const char *name __attr_unused__,
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254 uint64_t value __attr_unused__)
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255 {
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256 quota_set_error(root->setup->quota, MAIL_STORAGE_ERR_NO_PERMISSION);
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257 return -1;
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258 }
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259
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260 static struct quota_root_transaction_context *
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261 dirsize_quota_transaction_begin(struct quota_root *_root,
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262 struct quota_transaction_context *_ctx)
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263 {
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264 struct dirsize_quota_root *root = (struct dirsize_quota_root *)_root;
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265 struct quota_root_transaction_context *ctx;
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266
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267 ctx = i_new(struct quota_root_transaction_context, 1);
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268 ctx->root = _root;
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269 ctx->ctx = _ctx;
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270
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271 /* Get dir usage only once at the beginning of transaction.
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272 When copying/appending lots of mails we don't want to re-read the
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273 entire directory structure after each mail. */
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274 if (get_quota_root_usage(root, &ctx->bytes_current) < 0 ||
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275 ctx->bytes_current == (uint64_t)-1) {
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276 ctx->bytes_current = (uint64_t)-1;
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277 quota_set_error(_root->setup->quota,
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278 "Internal quota calculation error");
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279 }
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280
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281 ctx->bytes_limit = root->storage_limit * 1024;
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282 ctx->count_limit = (uint64_t)-1;
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283 return ctx;
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284 }
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285
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286 static int
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287 dirsize_quota_transaction_commit(struct quota_root_transaction_context *ctx)
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288 {
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289 int ret = ctx->bytes_current == (uint64_t)-1 ? -1 : 0;
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290
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291 i_free(ctx);
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292 return ret;
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293 }
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294
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295 struct quota_backend quota_backend_dirsize = {
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296 "dirsize",
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297
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298 {
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299 dirsize_quota_init,
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300 dirsize_quota_deinit,
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301
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302 dirsize_quota_add_storage,
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303 dirsize_quota_remove_storage,
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304
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305 dirsize_quota_root_get_resources,
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306
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307 dirsize_quota_get_resource,
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308 dirsize_quota_set_resource,
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309
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310 dirsize_quota_transaction_begin,
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311 dirsize_quota_transaction_commit,
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312 quota_default_transaction_rollback,
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313
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314 quota_default_try_alloc,
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315 quota_default_try_alloc_bytes,
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316 quota_default_test_alloc_bytes,
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317 quota_default_alloc,
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318 quota_default_free
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319 }
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320 };