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annotate src/http/ngx_http_cache.h @ 3711:ce6ba077c270

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several changes in cache cleanup handling: *) now ngx_http_file_cache_cleanup() uses ngx_http_file_cache_free() *) ngx_http_file_cache_free() interface has been changed to accept r->cache ngx_http_file_cache_cleanup() must use r->cache, but not r, because there can be several r->cache's during request processing, r->cache may be NULL at request finalising, etc. *) test if updating request does not complete correctly
author Igor Sysoev <igor@sysoev.ru>
date Wed, 28 Jul 2010 15:49:34 +0000
parents b0a0686a85bb
children 76e3a93821b1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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7 #ifndef _NGX_HTTP_CACHE_H_INCLUDED_
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8 #define _NGX_HTTP_CACHE_H_INCLUDED_
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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13 #include <ngx_http.h>
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15
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16 #define NGX_HTTP_CACHE_MISS 1
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17 #define NGX_HTTP_CACHE_BYPASS 2
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18 #define NGX_HTTP_CACHE_EXPIRED 3
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19 #define NGX_HTTP_CACHE_STALE 4
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20 #define NGX_HTTP_CACHE_UPDATING 5
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21 #define NGX_HTTP_CACHE_HIT 6
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22 #define NGX_HTTP_CACHE_SCARCE 7
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24 #define NGX_HTTP_CACHE_KEY_LEN 16
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27 typedef struct {
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28 ngx_uint_t status;
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29 time_t valid;
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30 } ngx_http_cache_valid_t;
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31
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32
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33 typedef struct {
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34 ngx_rbtree_node_t node;
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35 ngx_queue_t queue;
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36
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37 u_char key[NGX_HTTP_CACHE_KEY_LEN
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38 - sizeof(ngx_rbtree_key_t)];
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39
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40 unsigned count:20;
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41 unsigned uses:10;
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42 unsigned valid_msec:10;
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43 unsigned error:10;
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44 unsigned exists:1;
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45 unsigned updating:1;
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46 /* 12 unused bits */
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47
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48 ngx_file_uniq_t uniq;
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49 time_t expire;
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50 time_t valid_sec;
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51 size_t body_start;
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52 off_t length;
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53 } ngx_http_file_cache_node_t;
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54
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55
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56 struct ngx_http_cache_s {
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57 ngx_file_t file;
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58 ngx_array_t keys;
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59 uint32_t crc32;
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60 u_char key[NGX_HTTP_CACHE_KEY_LEN];
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61
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62 ngx_file_uniq_t uniq;
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63 time_t valid_sec;
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64 time_t last_modified;
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65 time_t date;
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66
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67 size_t header_start;
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68 size_t body_start;
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69 off_t length;
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70
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71 ngx_uint_t min_uses;
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72 ngx_uint_t error;
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73 ngx_uint_t valid_msec;
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74
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75 ngx_buf_t *buf;
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76
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77 ngx_http_file_cache_t *file_cache;
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78 ngx_http_file_cache_node_t *node;
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79
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80 unsigned updated:1;
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81 unsigned updating:1;
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82 unsigned exists:1;
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83 unsigned temp_file:1;
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84 };
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86
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87 typedef struct {
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88 time_t valid_sec;
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89 time_t last_modified;
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90 time_t date;
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91 uint32_t crc32;
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92 u_short valid_msec;
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93 u_short header_start;
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94 u_short body_start;
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95 } ngx_http_file_cache_header_t;
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97
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98 typedef struct {
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99 ngx_rbtree_t rbtree;
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100 ngx_rbtree_node_t sentinel;
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101 ngx_queue_t queue;
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102 ngx_atomic_t cold;
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103 ngx_atomic_t loading;
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104 off_t size;
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105 } ngx_http_file_cache_sh_t;
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106
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107
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108 struct ngx_http_file_cache_s {
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109 ngx_http_file_cache_sh_t *sh;
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110 ngx_slab_pool_t *shpool;
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111
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112 ngx_path_t *path;
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113
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114 off_t max_size;
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115 size_t bsize;
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116
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117 time_t inactive;
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118
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119 ngx_msec_t last;
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120 ngx_uint_t files;
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121
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122 ngx_shm_zone_t *shm_zone;
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123 };
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124
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125
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126 ngx_int_t ngx_http_file_cache_new(ngx_http_request_t *r);
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127 ngx_int_t ngx_http_file_cache_create(ngx_http_request_t *r);
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128 void ngx_http_file_cache_create_key(ngx_http_request_t *r);
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129 ngx_int_t ngx_http_file_cache_open(ngx_http_request_t *r);
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130 void ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf);
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131 void ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf);
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132 ngx_int_t ngx_http_cache_send(ngx_http_request_t *);
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133 void ngx_http_file_cache_free(ngx_http_cache_t *c, ngx_temp_file_t *tf);
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134 time_t ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status);
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135
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136 char *ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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137 void *conf);
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138 char *ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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139 void *conf);
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140
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141
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0998606fbfd4 $upstream_cache_status
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142 extern ngx_str_t ngx_http_cache_status[];
0998606fbfd4 $upstream_cache_status
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143
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a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
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144
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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145 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */