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332
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10
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11
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12 /*
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13 * open file cache caches
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14 * open file handles with stat() info;
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15 * directories stat() info;
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16 * files and directories errors: not found, access denied, etc.
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17 */
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18
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19
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532
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20 #define NGX_MIN_READ_AHEAD (128 * 1024)
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21
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22
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332
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23 static void ngx_open_file_cache_cleanup(void *data);
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358
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24 static ngx_int_t ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of,
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25 ngx_log_t *log);
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26 static void ngx_open_file_add_event(ngx_open_file_cache_t *cache,
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27 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log);
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332
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28 static void ngx_open_file_cleanup(void *data);
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29 static void ngx_close_cached_file(ngx_open_file_cache_t *cache,
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358
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30 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log);
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31 static void ngx_open_file_del_event(ngx_cached_open_file_t *file);
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332
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32 static void ngx_expire_old_cached_files(ngx_open_file_cache_t *cache,
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33 ngx_uint_t n, ngx_log_t *log);
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34 static void ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
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35 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
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358
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36 static ngx_cached_open_file_t *
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37 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name,
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38 uint32_t hash);
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332
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39 static void ngx_open_file_cache_remove(ngx_event_t *ev);
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40
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41
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42 ngx_open_file_cache_t *
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43 ngx_open_file_cache_init(ngx_pool_t *pool, ngx_uint_t max, time_t inactive)
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44 {
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45 ngx_pool_cleanup_t *cln;
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46 ngx_open_file_cache_t *cache;
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47
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48 cache = ngx_palloc(pool, sizeof(ngx_open_file_cache_t));
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49 if (cache == NULL) {
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50 return NULL;
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51 }
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52
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358
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53 ngx_rbtree_init(&cache->rbtree, &cache->sentinel,
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54 ngx_open_file_cache_rbtree_insert_value);
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332
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55
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358
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56 ngx_queue_init(&cache->expire_queue);
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332
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57
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58 cache->current = 0;
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59 cache->max = max;
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60 cache->inactive = inactive;
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61
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62 cln = ngx_pool_cleanup_add(pool, 0);
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63 if (cln == NULL) {
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64 return NULL;
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65 }
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66
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67 cln->handler = ngx_open_file_cache_cleanup;
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68 cln->data = cache;
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69
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70 return cache;
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71 }
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72
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73
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74 static void
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75 ngx_open_file_cache_cleanup(void *data)
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76 {
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77 ngx_open_file_cache_t *cache = data;
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78
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358
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79 ngx_queue_t *q;
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332
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80 ngx_cached_open_file_t *file;
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81
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82 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
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83 "open file cache cleanup");
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84
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85 for ( ;; ) {
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86
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358
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87 if (ngx_queue_empty(&cache->expire_queue)) {
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332
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88 break;
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89 }
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90
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358
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91 q = ngx_queue_last(&cache->expire_queue);
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92
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93 file = ngx_queue_data(q, ngx_cached_open_file_t, queue);
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94
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95 ngx_queue_remove(q);
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332
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96
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97 ngx_rbtree_delete(&cache->rbtree, &file->node);
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98
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99 cache->current--;
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100
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101 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
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102 "delete cached open file: %s", file->name);
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103
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104 if (!file->err && !file->is_dir) {
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105 file->close = 1;
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106 file->count = 0;
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358
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107 ngx_close_cached_file(cache, file, 0, ngx_cycle->log);
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332
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108
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109 } else {
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110 ngx_free(file->name);
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111 ngx_free(file);
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112 }
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113 }
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114
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115 if (cache->current) {
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116 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
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117 "%d items still leave in open file cache",
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118 cache->current);
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119 }
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120
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121 if (cache->rbtree.root != cache->rbtree.sentinel) {
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122 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
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123 "rbtree still is not empty in open file cache");
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124
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125 }
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126 }
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127
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128
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129 ngx_int_t
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130 ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name,
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131 ngx_open_file_info_t *of, ngx_pool_t *pool)
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132 {
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133 time_t now;
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134 uint32_t hash;
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135 ngx_int_t rc;
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482
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136 ngx_file_info_t fi;
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332
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137 ngx_pool_cleanup_t *cln;
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138 ngx_cached_open_file_t *file;
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139 ngx_pool_cleanup_file_t *clnf;
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140 ngx_open_file_cache_cleanup_t *ofcln;
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141
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384
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142 of->fd = NGX_INVALID_FILE;
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332
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143 of->err = 0;
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144
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145 if (cache == NULL) {
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146
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482
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147 if (of->test_only) {
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148
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484
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149 if (ngx_file_info(name->data, &fi) == NGX_FILE_ERROR) {
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482
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150 of->err = ngx_errno;
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151 of->failed = ngx_file_info_n;
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152 return NGX_ERROR;
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153 }
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154
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155 of->uniq = ngx_file_uniq(&fi);
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156 of->mtime = ngx_file_mtime(&fi);
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157 of->size = ngx_file_size(&fi);
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622
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158 of->fs_size = ngx_file_fs_size(&fi);
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482
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159 of->is_dir = ngx_is_dir(&fi);
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160 of->is_file = ngx_is_file(&fi);
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161 of->is_link = ngx_is_link(&fi);
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162 of->is_exec = ngx_is_exec(&fi);
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163
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164 return NGX_OK;
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165 }
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166
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332
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167 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t));
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168 if (cln == NULL) {
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169 return NGX_ERROR;
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170 }
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171
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172 rc = ngx_open_and_stat_file(name->data, of, pool->log);
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173
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174 if (rc == NGX_OK && !of->is_dir) {
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175 cln->handler = ngx_pool_cleanup_file;
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176 clnf = cln->data;
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177
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178 clnf->fd = of->fd;
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179 clnf->name = name->data;
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180 clnf->log = pool->log;
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181 }
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182
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183 return rc;
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184 }
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185
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186 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t));
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187 if (cln == NULL) {
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188 return NGX_ERROR;
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189 }
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190
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191 now = ngx_time();
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192
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358
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193 hash = ngx_crc32_long(name->data, name->len);
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194
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195 file = ngx_open_file_lookup(cache, name, hash);
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196
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197 if (file) {
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198
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199 file->uses++;
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200
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201 ngx_queue_remove(&file->queue);
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332
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202
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358
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203 if (file->fd == NGX_INVALID_FILE && file->err == 0 && !file->is_dir) {
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204
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205 /* file was not used often enough to keep open */
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206
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207 rc = ngx_open_and_stat_file(name->data, of, pool->log);
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332
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208
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358
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209 if (rc != NGX_OK && (of->err == 0 || !of->errors)) {
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210 goto failed;
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211 }
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212
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213 goto add_event;
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332
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214 }
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215
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384
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216 if (file->use_event
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217 || (file->event == NULL
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218 && (of->uniq == 0 || of->uniq == file->uniq)
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219 && now - file->created < of->valid))
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358
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220 {
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221 if (file->err == 0) {
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332
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222
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358
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223 of->fd = file->fd;
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224 of->uniq = file->uniq;
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225 of->mtime = file->mtime;
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226 of->size = file->size;
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332
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227
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358
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228 of->is_dir = file->is_dir;
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229 of->is_file = file->is_file;
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230 of->is_link = file->is_link;
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231 of->is_exec = file->is_exec;
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410
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232 of->is_directio = file->is_directio;
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332
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233
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358
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234 if (!file->is_dir) {
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235 file->count++;
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236 ngx_open_file_add_event(cache, file, of, pool->log);
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332
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237 }
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238
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358
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239 } else {
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240 of->err = file->err;
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484
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241 of->failed = ngx_open_file_n;
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358
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242 }
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243
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244 goto found;
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245 }
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246
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247 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0,
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248 "retest open file: %s, fd:%d, c:%d, e:%d",
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249 file->name, file->fd, file->count, file->err);
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250
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251 if (file->is_dir) {
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252
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253 /*
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254 * chances that directory became file are very small
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255 * so test_dir flag allows to use a single syscall
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256 * in ngx_file_info() instead of three syscalls
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257 */
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258
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259 of->test_dir = 1;
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260 }
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261
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384
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262 of->fd = file->fd;
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263 of->uniq = file->uniq;
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264
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358
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265 rc = ngx_open_and_stat_file(name->data, of, pool->log);
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332
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266
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358
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267 if (rc != NGX_OK && (of->err == 0 || !of->errors)) {
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268 goto failed;
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269 }
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270
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271 if (of->is_dir) {
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272
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273 if (file->is_dir || file->err) {
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274 goto update;
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275 }
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276
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277 /* file became directory */
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278
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279 } else if (of->err == 0) { /* file */
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280
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281 if (file->is_dir || file->err) {
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282 goto add_event;
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283 }
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284
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384
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285 if (of->uniq == file->uniq) {
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332
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286
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358
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287 if (file->event) {
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288 file->use_event = 1;
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332
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289 }
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290
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638
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291 of->is_directio = file->is_directio;
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292
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293 goto update;
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358
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294 }
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332
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295
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358
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296 /* file was changed */
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332
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297
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358
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298 } else { /* error to cache */
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332
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299
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358
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300 if (file->err || file->is_dir) {
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301 goto update;
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332
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302 }
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303
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358
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304 /* file was removed, etc. */
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305 }
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306
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307 if (file->count == 0) {
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308
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309 ngx_open_file_del_event(file);
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332
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310
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358
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311 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
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312 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno,
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313 ngx_close_file_n " \"%s\" failed",
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314 name->data);
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315 }
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332
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316
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358
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317 goto add_event;
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318 }
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319
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320 ngx_rbtree_delete(&cache->rbtree, &file->node);
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321
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322 cache->current--;
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323
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324 file->close = 1;
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325
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326 goto create;
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332
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327 }
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328
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329 /* not found */
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330
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331 rc = ngx_open_and_stat_file(name->data, of, pool->log);
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332
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333 if (rc != NGX_OK && (of->err == 0 || !of->errors)) {
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334 goto failed;
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335 }
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336
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337 create:
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338
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339 if (cache->current >= cache->max) {
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340 ngx_expire_old_cached_files(cache, 0, pool->log);
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341 }
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342
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343 file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log);
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344
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345 if (file == NULL) {
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346 goto failed;
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347 }
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348
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349 file->name = ngx_alloc(name->len + 1, pool->log);
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350
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351 if (file->name == NULL) {
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352 ngx_free(file);
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353 file = NULL;
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354 goto failed;
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355 }
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356
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357 ngx_cpystrn(file->name, name->data, name->len + 1);
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358
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359 file->node.key = hash;
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360
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361 ngx_rbtree_insert(&cache->rbtree, &file->node);
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362
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363 cache->current++;
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364
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358
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365 file->uses = 1;
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332
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366 file->count = 0;
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500
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367 file->use_event = 0;
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358
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368 file->event = NULL;
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369
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370 add_event:
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371
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372 ngx_open_file_add_event(cache, file, of, pool->log);
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332
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373
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374 update:
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375
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376 file->fd = of->fd;
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377 file->err = of->err;
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378
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379 if (of->err == 0) {
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380 file->uniq = of->uniq;
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381 file->mtime = of->mtime;
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382 file->size = of->size;
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383
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384 file->close = 0;
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385
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386 file->is_dir = of->is_dir;
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387 file->is_file = of->is_file;
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388 file->is_link = of->is_link;
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389 file->is_exec = of->is_exec;
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410
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390 file->is_directio = of->is_directio;
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332
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391
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392 if (!of->is_dir) {
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393 file->count++;
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394 }
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395 }
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396
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397 file->created = now;
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398
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399 found:
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400
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401 file->accessed = now;
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402
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358
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403 ngx_queue_insert_head(&cache->expire_queue, &file->queue);
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332
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404
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358
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405 ngx_log_debug5(NGX_LOG_DEBUG_CORE, pool->log, 0,
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406 "cached open file: %s, fd:%d, c:%d, e:%d, u:%d",
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407 file->name, file->fd, file->count, file->err, file->uses);
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332
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408
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|
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409 if (of->err == 0) {
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410
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|
|
411 if (!of->is_dir) {
|
|
|
412 cln->handler = ngx_open_file_cleanup;
|
|
|
413 ofcln = cln->data;
|
|
|
414
|
|
|
415 ofcln->cache = cache;
|
|
|
416 ofcln->file = file;
|
|
358
|
417 ofcln->min_uses = of->min_uses;
|
|
332
|
418 ofcln->log = pool->log;
|
|
|
419 }
|
|
|
420
|
|
|
421 return NGX_OK;
|
|
|
422 }
|
|
|
423
|
|
|
424 return NGX_ERROR;
|
|
|
425
|
|
|
426 failed:
|
|
|
427
|
|
374
|
428 if (file) {
|
|
332
|
429 ngx_rbtree_delete(&cache->rbtree, &file->node);
|
|
|
430
|
|
|
431 cache->current--;
|
|
|
432
|
|
374
|
433 if (file->count == 0) {
|
|
|
434
|
|
376
|
435 if (file->fd != NGX_INVALID_FILE) {
|
|
|
436 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
|
|
|
437 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno,
|
|
|
438 ngx_close_file_n " \"%s\" failed",
|
|
374
|
439 file->name);
|
|
376
|
440 }
|
|
|
441 }
|
|
374
|
442
|
|
|
443 ngx_free(file->name);
|
|
|
444 ngx_free(file);
|
|
|
445
|
|
|
446 } else {
|
|
|
447 file->close = 1;
|
|
332
|
448 }
|
|
|
449 }
|
|
|
450
|
|
|
451 if (of->fd != NGX_INVALID_FILE) {
|
|
|
452 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) {
|
|
|
453 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno,
|
|
|
454 ngx_close_file_n " \"%s\" failed", name->data);
|
|
|
455 }
|
|
|
456 }
|
|
|
457
|
|
|
458 return NGX_ERROR;
|
|
|
459 }
|
|
|
460
|
|
|
461
|
|
|
462 static ngx_int_t
|
|
|
463 ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log)
|
|
|
464 {
|
|
|
465 ngx_fd_t fd;
|
|
|
466 ngx_file_info_t fi;
|
|
|
467
|
|
384
|
468 if (of->fd != NGX_INVALID_FILE) {
|
|
332
|
469
|
|
484
|
470 if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) {
|
|
482
|
471 of->failed = ngx_file_info_n;
|
|
384
|
472 goto failed;
|
|
332
|
473 }
|
|
|
474
|
|
384
|
475 if (of->uniq == ngx_file_uniq(&fi)) {
|
|
|
476 goto done;
|
|
|
477 }
|
|
|
478
|
|
|
479 } else if (of->test_dir) {
|
|
|
480
|
|
484
|
481 if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) {
|
|
482
|
482 of->failed = ngx_file_info_n;
|
|
384
|
483 goto failed;
|
|
|
484 }
|
|
332
|
485
|
|
440
|
486 if (ngx_is_dir(&fi)) {
|
|
384
|
487 goto done;
|
|
332
|
488 }
|
|
|
489 }
|
|
|
490
|
|
384
|
491 if (!of->log) {
|
|
568
|
492
|
|
|
493 /*
|
|
|
494 * Use non-blocking open() not to hang on FIFO files, etc.
|
|
|
495 * This flag has no effect on a regular files.
|
|
|
496 */
|
|
|
497
|
|
|
498 fd = ngx_open_file(name, NGX_FILE_RDONLY|NGX_FILE_NONBLOCK,
|
|
|
499 NGX_FILE_OPEN, 0);
|
|
384
|
500
|
|
|
501 } else {
|
|
470
|
502 fd = ngx_open_file(name, NGX_FILE_APPEND, NGX_FILE_CREATE_OR_OPEN,
|
|
384
|
503 NGX_FILE_DEFAULT_ACCESS);
|
|
|
504 }
|
|
332
|
505
|
|
|
506 if (fd == NGX_INVALID_FILE) {
|
|
482
|
507 of->failed = ngx_open_file_n;
|
|
384
|
508 goto failed;
|
|
332
|
509 }
|
|
|
510
|
|
|
511 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
|
|
|
512 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
|
|
|
513 ngx_fd_info_n " \"%s\" failed", name);
|
|
|
514
|
|
|
515 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
|
|
516 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
|
517 ngx_close_file_n " \"%s\" failed", name);
|
|
|
518 }
|
|
|
519
|
|
384
|
520 of->fd = NGX_INVALID_FILE;
|
|
|
521
|
|
332
|
522 return NGX_ERROR;
|
|
|
523 }
|
|
|
524
|
|
|
525 if (ngx_is_dir(&fi)) {
|
|
|
526 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
|
|
527 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
|
528 ngx_close_file_n " \"%s\" failed", name);
|
|
|
529 }
|
|
|
530
|
|
384
|
531 of->fd = NGX_INVALID_FILE;
|
|
|
532
|
|
|
533 } else {
|
|
|
534 of->fd = fd;
|
|
390
|
535
|
|
532
|
536 if (of->read_ahead && ngx_file_size(&fi) > NGX_MIN_READ_AHEAD) {
|
|
|
537 if (ngx_read_ahead(fd, of->read_ahead) == NGX_ERROR) {
|
|
|
538 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
|
539 ngx_read_ahead_n " \"%s\" failed", name);
|
|
|
540 }
|
|
|
541 }
|
|
|
542
|
|
390
|
543 if (of->directio <= ngx_file_size(&fi)) {
|
|
530
|
544 if (ngx_directio_on(fd) == NGX_FILE_ERROR) {
|
|
390
|
545 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
410
|
546 ngx_directio_on_n " \"%s\" failed", name);
|
|
406
|
547
|
|
|
548 } else {
|
|
|
549 of->is_directio = 1;
|
|
390
|
550 }
|
|
|
551 }
|
|
332
|
552 }
|
|
|
553
|
|
384
|
554 done:
|
|
|
555
|
|
332
|
556 of->uniq = ngx_file_uniq(&fi);
|
|
|
557 of->mtime = ngx_file_mtime(&fi);
|
|
|
558 of->size = ngx_file_size(&fi);
|
|
622
|
559 of->fs_size = ngx_file_fs_size(&fi);
|
|
332
|
560 of->is_dir = ngx_is_dir(&fi);
|
|
|
561 of->is_file = ngx_is_file(&fi);
|
|
|
562 of->is_link = ngx_is_link(&fi);
|
|
|
563 of->is_exec = ngx_is_exec(&fi);
|
|
|
564
|
|
|
565 return NGX_OK;
|
|
384
|
566
|
|
|
567 failed:
|
|
|
568
|
|
|
569 of->fd = NGX_INVALID_FILE;
|
|
|
570 of->err = ngx_errno;
|
|
|
571
|
|
|
572 return NGX_ERROR;
|
|
332
|
573 }
|
|
|
574
|
|
|
575
|
|
358
|
576 /*
|
|
|
577 * we ignore any possible event setting error and
|
|
|
578 * fallback to usual periodic file retests
|
|
|
579 */
|
|
|
580
|
|
|
581 static void
|
|
|
582 ngx_open_file_add_event(ngx_open_file_cache_t *cache,
|
|
|
583 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log)
|
|
|
584 {
|
|
|
585 ngx_open_file_cache_event_t *fev;
|
|
|
586
|
|
|
587 if (!(ngx_event_flags & NGX_USE_VNODE_EVENT)
|
|
|
588 || !of->events
|
|
|
589 || file->event
|
|
|
590 || of->fd == NGX_INVALID_FILE
|
|
|
591 || file->uses < of->min_uses)
|
|
|
592 {
|
|
|
593 return;
|
|
|
594 }
|
|
|
595
|
|
384
|
596 file->use_event = 0;
|
|
|
597
|
|
358
|
598 file->event = ngx_calloc(sizeof(ngx_event_t), log);
|
|
|
599 if (file->event== NULL) {
|
|
|
600 return;
|
|
|
601 }
|
|
|
602
|
|
|
603 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), log);
|
|
|
604 if (fev == NULL) {
|
|
|
605 ngx_free(file->event);
|
|
|
606 file->event = NULL;
|
|
|
607 return;
|
|
|
608 }
|
|
|
609
|
|
|
610 fev->fd = of->fd;
|
|
|
611 fev->file = file;
|
|
|
612 fev->cache = cache;
|
|
|
613
|
|
|
614 file->event->handler = ngx_open_file_cache_remove;
|
|
|
615 file->event->data = fev;
|
|
|
616
|
|
|
617 /*
|
|
|
618 * although vnode event may be called while ngx_cycle->poll
|
|
|
619 * destruction, however, cleanup procedures are run before any
|
|
|
620 * memory freeing and events will be canceled.
|
|
|
621 */
|
|
|
622
|
|
|
623 file->event->log = ngx_cycle->log;
|
|
|
624
|
|
|
625 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT)
|
|
|
626 != NGX_OK)
|
|
|
627 {
|
|
|
628 ngx_free(file->event->data);
|
|
|
629 ngx_free(file->event);
|
|
|
630 file->event = NULL;
|
|
|
631 return;
|
|
|
632 }
|
|
|
633
|
|
|
634 /*
|
|
384
|
635 * we do not set file->use_event here because there may be a race
|
|
|
636 * condition: a file may be deleted between opening the file and
|
|
|
637 * adding event, so we rely upon event notification only after
|
|
|
638 * one file revalidation on next file access
|
|
358
|
639 */
|
|
|
640
|
|
|
641 return;
|
|
|
642 }
|
|
|
643
|
|
|
644
|
|
332
|
645 static void
|
|
|
646 ngx_open_file_cleanup(void *data)
|
|
|
647 {
|
|
|
648 ngx_open_file_cache_cleanup_t *c = data;
|
|
|
649
|
|
|
650 c->file->count--;
|
|
|
651
|
|
358
|
652 ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log);
|
|
332
|
653
|
|
|
654 /* drop one or two expired open files */
|
|
|
655 ngx_expire_old_cached_files(c->cache, 1, c->log);
|
|
|
656 }
|
|
|
657
|
|
|
658
|
|
|
659 static void
|
|
|
660 ngx_close_cached_file(ngx_open_file_cache_t *cache,
|
|
358
|
661 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log)
|
|
332
|
662 {
|
|
358
|
663 ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0,
|
|
|
664 "close cached open file: %s, fd:%d, c:%d, u:%d, %d",
|
|
|
665 file->name, file->fd, file->count, file->uses, file->close);
|
|
332
|
666
|
|
|
667 if (!file->close) {
|
|
|
668
|
|
|
669 file->accessed = ngx_time();
|
|
|
670
|
|
358
|
671 ngx_queue_remove(&file->queue);
|
|
332
|
672
|
|
358
|
673 ngx_queue_insert_head(&cache->expire_queue, &file->queue);
|
|
332
|
674
|
|
358
|
675 if (file->uses >= min_uses || file->count) {
|
|
|
676 return;
|
|
332
|
677 }
|
|
|
678 }
|
|
|
679
|
|
358
|
680 ngx_open_file_del_event(file);
|
|
332
|
681
|
|
|
682 if (file->count) {
|
|
|
683 return;
|
|
|
684 }
|
|
|
685
|
|
358
|
686 if (file->fd != NGX_INVALID_FILE) {
|
|
|
687
|
|
|
688 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
|
|
|
689 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
|
690 ngx_close_file_n " \"%s\" failed", file->name);
|
|
|
691 }
|
|
|
692
|
|
|
693 file->fd = NGX_INVALID_FILE;
|
|
|
694 }
|
|
|
695
|
|
|
696 if (!file->close) {
|
|
|
697 return;
|
|
332
|
698 }
|
|
|
699
|
|
|
700 ngx_free(file->name);
|
|
|
701 ngx_free(file);
|
|
|
702 }
|
|
|
703
|
|
|
704
|
|
|
705 static void
|
|
358
|
706 ngx_open_file_del_event(ngx_cached_open_file_t *file)
|
|
|
707 {
|
|
|
708 if (file->event == NULL) {
|
|
|
709 return;
|
|
|
710 }
|
|
|
711
|
|
|
712 (void) ngx_del_event(file->event, NGX_VNODE_EVENT,
|
|
|
713 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT);
|
|
|
714
|
|
|
715 ngx_free(file->event->data);
|
|
|
716 ngx_free(file->event);
|
|
|
717 file->event = NULL;
|
|
|
718 file->use_event = 0;
|
|
|
719 }
|
|
|
720
|
|
|
721
|
|
|
722 static void
|
|
332
|
723 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n,
|
|
|
724 ngx_log_t *log)
|
|
|
725 {
|
|
|
726 time_t now;
|
|
358
|
727 ngx_queue_t *q;
|
|
332
|
728 ngx_cached_open_file_t *file;
|
|
|
729
|
|
|
730 now = ngx_time();
|
|
|
731
|
|
|
732 /*
|
|
|
733 * n == 1 deletes one or two inactive files
|
|
|
734 * n == 0 deletes least recently used file by force
|
|
|
735 * and one or two inactive files
|
|
|
736 */
|
|
|
737
|
|
|
738 while (n < 3) {
|
|
|
739
|
|
358
|
740 if (ngx_queue_empty(&cache->expire_queue)) {
|
|
332
|
741 return;
|
|
|
742 }
|
|
|
743
|
|
358
|
744 q = ngx_queue_last(&cache->expire_queue);
|
|
|
745
|
|
|
746 file = ngx_queue_data(q, ngx_cached_open_file_t, queue);
|
|
|
747
|
|
332
|
748 if (n++ != 0 && now - file->accessed <= cache->inactive) {
|
|
|
749 return;
|
|
|
750 }
|
|
|
751
|
|
358
|
752 ngx_queue_remove(q);
|
|
332
|
753
|
|
|
754 ngx_rbtree_delete(&cache->rbtree, &file->node);
|
|
|
755
|
|
|
756 cache->current--;
|
|
|
757
|
|
|
758 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0,
|
|
|
759 "expire cached open file: %s", file->name);
|
|
|
760
|
|
|
761 if (!file->err && !file->is_dir) {
|
|
|
762 file->close = 1;
|
|
358
|
763 ngx_close_cached_file(cache, file, 0, log);
|
|
332
|
764
|
|
|
765 } else {
|
|
|
766 ngx_free(file->name);
|
|
|
767 ngx_free(file);
|
|
|
768 }
|
|
|
769 }
|
|
|
770 }
|
|
|
771
|
|
|
772
|
|
|
773 static void
|
|
|
774 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
|
|
|
775 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
|
|
|
776 {
|
|
|
777 ngx_rbtree_node_t **p;
|
|
|
778 ngx_cached_open_file_t *file, *file_temp;
|
|
|
779
|
|
|
780 for ( ;; ) {
|
|
|
781
|
|
|
782 if (node->key < temp->key) {
|
|
|
783
|
|
|
784 p = &temp->left;
|
|
|
785
|
|
|
786 } else if (node->key > temp->key) {
|
|
|
787
|
|
|
788 p = &temp->right;
|
|
|
789
|
|
|
790 } else { /* node->key == temp->key */
|
|
|
791
|
|
|
792 file = (ngx_cached_open_file_t *) node;
|
|
|
793 file_temp = (ngx_cached_open_file_t *) temp;
|
|
|
794
|
|
|
795 p = (ngx_strcmp(file->name, file_temp->name) < 0)
|
|
|
796 ? &temp->left : &temp->right;
|
|
|
797 }
|
|
|
798
|
|
|
799 if (*p == sentinel) {
|
|
|
800 break;
|
|
|
801 }
|
|
|
802
|
|
|
803 temp = *p;
|
|
|
804 }
|
|
|
805
|
|
|
806 *p = node;
|
|
|
807 node->parent = temp;
|
|
|
808 node->left = sentinel;
|
|
|
809 node->right = sentinel;
|
|
|
810 ngx_rbt_red(node);
|
|
|
811 }
|
|
|
812
|
|
|
813
|
|
358
|
814 static ngx_cached_open_file_t *
|
|
|
815 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name,
|
|
|
816 uint32_t hash)
|
|
|
817 {
|
|
|
818 ngx_int_t rc;
|
|
|
819 ngx_rbtree_node_t *node, *sentinel;
|
|
|
820 ngx_cached_open_file_t *file;
|
|
|
821
|
|
|
822 node = cache->rbtree.root;
|
|
|
823 sentinel = cache->rbtree.sentinel;
|
|
|
824
|
|
|
825 while (node != sentinel) {
|
|
|
826
|
|
|
827 if (hash < node->key) {
|
|
|
828 node = node->left;
|
|
|
829 continue;
|
|
|
830 }
|
|
|
831
|
|
|
832 if (hash > node->key) {
|
|
|
833 node = node->right;
|
|
|
834 continue;
|
|
|
835 }
|
|
|
836
|
|
|
837 /* hash == node->key */
|
|
|
838
|
|
|
839 do {
|
|
|
840 file = (ngx_cached_open_file_t *) node;
|
|
|
841
|
|
|
842 rc = ngx_strcmp(name->data, file->name);
|
|
|
843
|
|
|
844 if (rc == 0) {
|
|
|
845 return file;
|
|
|
846 }
|
|
|
847
|
|
|
848 node = (rc < 0) ? node->left : node->right;
|
|
|
849
|
|
|
850 } while (node != sentinel && hash == node->key);
|
|
|
851
|
|
|
852 break;
|
|
|
853 }
|
|
|
854
|
|
|
855 return NULL;
|
|
|
856 }
|
|
|
857
|
|
|
858
|
|
332
|
859 static void
|
|
|
860 ngx_open_file_cache_remove(ngx_event_t *ev)
|
|
|
861 {
|
|
|
862 ngx_cached_open_file_t *file;
|
|
|
863 ngx_open_file_cache_event_t *fev;
|
|
|
864
|
|
|
865 fev = ev->data;
|
|
|
866 file = fev->file;
|
|
|
867
|
|
358
|
868 ngx_queue_remove(&file->queue);
|
|
332
|
869
|
|
|
870 ngx_rbtree_delete(&fev->cache->rbtree, &file->node);
|
|
|
871
|
|
|
872 fev->cache->current--;
|
|
|
873
|
|
|
874 /* NGX_ONESHOT_EVENT was already deleted */
|
|
|
875 file->event = NULL;
|
|
384
|
876 file->use_event = 0;
|
|
332
|
877
|
|
|
878 file->close = 1;
|
|
|
879
|
|
358
|
880 ngx_close_cached_file(fev->cache, file, 0, ev->log);
|
|
332
|
881
|
|
|
882 /* free memory only when fev->cache and fev->file are already not needed */
|
|
|
883
|
|
|
884 ngx_free(ev->data);
|
|
|
885 ngx_free(ev);
|
|
|
886 }
|
