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