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