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