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annotate src/http/ngx_http_cache.h @ 7660:d33e17499088

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Version bump.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 26 May 2020 22:03:00 +0300
parents 609daeb3b48b
children ccb5ff87ab3e
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_HTTP_CACHE_H_INCLUDED_
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9 #define _NGX_HTTP_CACHE_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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14 #include <ngx_http.h>
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16
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17 #define NGX_HTTP_CACHE_MISS 1
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18 #define NGX_HTTP_CACHE_BYPASS 2
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19 #define NGX_HTTP_CACHE_EXPIRED 3
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20 #define NGX_HTTP_CACHE_STALE 4
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21 #define NGX_HTTP_CACHE_UPDATING 5
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22 #define NGX_HTTP_CACHE_REVALIDATED 6
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23 #define NGX_HTTP_CACHE_HIT 7
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24 #define NGX_HTTP_CACHE_SCARCE 8
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25
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26 #define NGX_HTTP_CACHE_KEY_LEN 16
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27 #define NGX_HTTP_CACHE_ETAG_LEN 128
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28 #define NGX_HTTP_CACHE_VARY_LEN 128
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29
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30 #define NGX_HTTP_CACHE_VERSION 5
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31
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33 typedef struct {
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34 ngx_uint_t status;
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35 time_t valid;
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36 } ngx_http_cache_valid_t;
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37
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38
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39 typedef struct {
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40 ngx_rbtree_node_t node;
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41 ngx_queue_t queue;
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42
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43 u_char key[NGX_HTTP_CACHE_KEY_LEN
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44 - sizeof(ngx_rbtree_key_t)];
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45
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46 unsigned count:20;
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47 unsigned uses:10;
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48 unsigned valid_msec:10;
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49 unsigned error:10;
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50 unsigned exists:1;
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51 unsigned updating:1;
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52 unsigned deleting:1;
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53 unsigned purged:1;
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54 /* 10 unused bits */
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55
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56 ngx_file_uniq_t uniq;
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57 time_t expire;
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58 time_t valid_sec;
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59 size_t body_start;
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60 off_t fs_size;
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61 ngx_msec_t lock_time;
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62 } ngx_http_file_cache_node_t;
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63
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64
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65 struct ngx_http_cache_s {
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66 ngx_file_t file;
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67 ngx_array_t keys;
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68 uint32_t crc32;
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69 u_char key[NGX_HTTP_CACHE_KEY_LEN];
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70 u_char main[NGX_HTTP_CACHE_KEY_LEN];
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71
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72 ngx_file_uniq_t uniq;
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73 time_t valid_sec;
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74 time_t updating_sec;
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75 time_t error_sec;
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76 time_t last_modified;
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77 time_t date;
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78
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79 ngx_str_t etag;
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80 ngx_str_t vary;
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81 u_char variant[NGX_HTTP_CACHE_KEY_LEN];
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82
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83 size_t header_start;
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84 size_t body_start;
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85 off_t length;
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86 off_t fs_size;
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87
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88 ngx_uint_t min_uses;
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89 ngx_uint_t error;
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90 ngx_uint_t valid_msec;
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91 ngx_uint_t vary_tag;
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92
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93 ngx_buf_t *buf;
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94
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95 ngx_http_file_cache_t *file_cache;
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96 ngx_http_file_cache_node_t *node;
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97
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98 #if (NGX_THREADS || NGX_COMPAT)
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99 ngx_thread_task_t *thread_task;
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100 #endif
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101
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102 ngx_msec_t lock_timeout;
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103 ngx_msec_t lock_age;
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104 ngx_msec_t lock_time;
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105 ngx_msec_t wait_time;
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106
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107 ngx_event_t wait_event;
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108
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109 unsigned lock:1;
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110 unsigned waiting:1;
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111
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112 unsigned updated:1;
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113 unsigned updating:1;
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114 unsigned exists:1;
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115 unsigned temp_file:1;
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116 unsigned purged:1;
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117 unsigned reading:1;
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118 unsigned secondary:1;
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119 unsigned background:1;
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120
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121 unsigned stale_updating:1;
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122 unsigned stale_error:1;
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123 };
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125
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126 typedef struct {
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127 ngx_uint_t version;
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128 time_t valid_sec;
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129 time_t updating_sec;
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130 time_t error_sec;
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131 time_t last_modified;
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132 time_t date;
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133 uint32_t crc32;
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134 u_short valid_msec;
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135 u_short header_start;
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136 u_short body_start;
5737
44b9ab7752e3 Cache: ETag now saved into cache header.
Maxim Dounin <mdounin@mdounin.ru>
parents: 5736
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137 u_char etag_len;
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Maxim Dounin <mdounin@mdounin.ru>
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138 u_char etag[NGX_HTTP_CACHE_ETAG_LEN];
5878
2c89956b6a76 Cache: hash of Vary headers now stored in cache.
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139 u_char vary_len;
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Maxim Dounin <mdounin@mdounin.ru>
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140 u_char vary[NGX_HTTP_CACHE_VARY_LEN];
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141 u_char variant[NGX_HTTP_CACHE_KEY_LEN];
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142 } ngx_http_file_cache_header_t;
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143
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144
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145 typedef struct {
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146 ngx_rbtree_t rbtree;
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147 ngx_rbtree_node_t sentinel;
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148 ngx_queue_t queue;
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149 ngx_atomic_t cold;
3018
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150 ngx_atomic_t loading;
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151 off_t size;
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c9d680b00744 Cache: added watermark to reduce IO load when keys_zone is full.
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152 ngx_uint_t count;
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153 ngx_uint_t watermark;
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154 } ngx_http_file_cache_sh_t;
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155
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156
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157 struct ngx_http_file_cache_s {
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158 ngx_http_file_cache_sh_t *sh;
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159 ngx_slab_pool_t *shpool;
469
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diff changeset
160
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diff changeset
161 ngx_path_t *path;
201
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162
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163 off_t max_size;
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164 size_t bsize;
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165
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166 time_t inactive;
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167
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168 time_t fail_time;
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169
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170 ngx_uint_t files;
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171 ngx_uint_t loader_files;
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172 ngx_msec_t last;
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173 ngx_msec_t loader_sleep;
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174 ngx_msec_t loader_threshold;
201
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175
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176 ngx_uint_t manager_files;
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177 ngx_msec_t manager_sleep;
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178 ngx_msec_t manager_threshold;
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179
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180 ngx_shm_zone_t *shm_zone;
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181
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182 ngx_uint_t use_temp_path;
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183 /* unsigned use_temp_path:1 */
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diff changeset
184 };
200
abeaebe0a33c nginx-0.0.1-2003-11-28-20:41:47 import
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diff changeset
185
197
0b81c7a0b133 nginx-0.0.1-2003-11-27-10:45:22 import
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parents: 195
diff changeset
186
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187 ngx_int_t ngx_http_file_cache_new(ngx_http_request_t *r);
3699
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188 ngx_int_t ngx_http_file_cache_create(ngx_http_request_t *r);
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189 void ngx_http_file_cache_create_key(ngx_http_request_t *r);
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190 ngx_int_t ngx_http_file_cache_open(ngx_http_request_t *r);
5959
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Valentin Bartenev <vbart@nginx.com>
parents: 5905
diff changeset
191 ngx_int_t ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf);
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diff changeset
192 void ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf);
5441
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Maxim Dounin <mdounin@mdounin.ru>
parents: 4412
diff changeset
193 void ngx_http_file_cache_update_header(ngx_http_request_t *r);
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diff changeset
194 ngx_int_t ngx_http_cache_send(ngx_http_request_t *);
3711
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195 void ngx_http_file_cache_free(ngx_http_cache_t *c, ngx_temp_file_t *tf);
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diff changeset
196 time_t ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status);
199
a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
Igor Sysoev <igor@sysoev.ru>
parents: 197
diff changeset
197
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198 char *ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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diff changeset
199 void *conf);
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diff changeset
200 char *ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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diff changeset
201 void *conf);
469
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diff changeset
202
3526
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Igor Sysoev <igor@sysoev.ru>
parents: 3052
diff changeset
203
2952
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diff changeset
204 extern ngx_str_t ngx_http_cache_status[];
0998606fbfd4 $upstream_cache_status
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diff changeset
205
199
a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
Igor Sysoev <igor@sysoev.ru>
parents: 197
diff changeset
206
170
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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parents:
diff changeset
207 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */