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