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