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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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0
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5 */
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6
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7
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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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10
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11
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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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15
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16
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502
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17 #define NGX_HTTP_CACHE_MISS 1
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588
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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_HIT 6
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23 #define NGX_HTTP_CACHE_SCARCE 7
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0
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24
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464
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25 #define NGX_HTTP_CACHE_KEY_LEN 16
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0
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26
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27
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28 typedef struct {
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464
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29 ngx_uint_t status;
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30 time_t valid;
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31 } ngx_http_cache_valid_t;
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32
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33
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34 typedef struct {
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35 ngx_rbtree_node_t node;
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36 ngx_queue_t queue;
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37
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38 u_char key[NGX_HTTP_CACHE_KEY_LEN
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39 - sizeof(ngx_rbtree_key_t)];
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40
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41 unsigned count:20;
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42 unsigned uses:10;
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43 unsigned valid_msec:10;
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44 unsigned error:10;
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45 unsigned exists:1;
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498
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46 unsigned updating:1;
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596
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47 unsigned deleting:1;
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48 /* 11 unused bits */
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464
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49
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50 ngx_file_uniq_t uniq;
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51 time_t expire;
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52 time_t valid_sec;
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53 size_t body_start;
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622
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54 off_t fs_size;
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464
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55 } ngx_http_file_cache_node_t;
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56
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18
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57
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464
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58 struct ngx_http_cache_s {
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59 ngx_file_t file;
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60 ngx_array_t keys;
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61 uint32_t crc32;
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62 u_char key[NGX_HTTP_CACHE_KEY_LEN];
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63
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64 ngx_file_uniq_t uniq;
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65 time_t valid_sec;
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66 time_t last_modified;
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67 time_t date;
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68
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69 size_t header_start;
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70 size_t body_start;
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71 off_t length;
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622
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72 off_t fs_size;
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464
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73
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74 ngx_uint_t min_uses;
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75 ngx_uint_t error;
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76 ngx_uint_t valid_msec;
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77
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78 ngx_buf_t *buf;
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79
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80 ngx_http_file_cache_t *file_cache;
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81 ngx_http_file_cache_node_t *node;
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82
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656
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83 ngx_msec_t lock_timeout;
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84 ngx_msec_t wait_time;
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85
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86 ngx_event_t wait_event;
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87
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88 unsigned lock:1;
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89 unsigned waiting:1;
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90
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464
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91 unsigned updated:1;
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590
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92 unsigned updating:1;
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464
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93 unsigned exists:1;
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94 unsigned temp_file:1;
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95 };
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0
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96
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97
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22
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98 typedef struct {
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464
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99 time_t valid_sec;
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100 time_t last_modified;
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101 time_t date;
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102 uint32_t crc32;
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103 u_short valid_msec;
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104 u_short header_start;
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105 u_short body_start;
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106 } ngx_http_file_cache_header_t;
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26
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107
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108
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480
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109 typedef struct {
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110 ngx_rbtree_t rbtree;
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111 ngx_rbtree_node_t sentinel;
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112 ngx_queue_t queue;
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113 ngx_atomic_t cold;
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514
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114 ngx_atomic_t loading;
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480
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115 off_t size;
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116 } ngx_http_file_cache_sh_t;
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117
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118
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464
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119 struct ngx_http_file_cache_s {
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480
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120 ngx_http_file_cache_sh_t *sh;
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464
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121 ngx_slab_pool_t *shpool;
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18
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122
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464
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123 ngx_path_t *path;
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0
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124
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468
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125 off_t max_size;
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126 size_t bsize;
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127
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464
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128 time_t inactive;
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468
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129
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632
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130 ngx_uint_t files;
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131 ngx_uint_t loader_files;
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468
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132 ngx_msec_t last;
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632
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133 ngx_msec_t loader_sleep;
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134 ngx_msec_t loader_threshold;
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0
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135
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464
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136 ngx_shm_zone_t *shm_zone;
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137 };
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0
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138
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139
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588
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140 ngx_int_t ngx_http_file_cache_new(ngx_http_request_t *r);
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141 ngx_int_t ngx_http_file_cache_create(ngx_http_request_t *r);
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464
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142 void ngx_http_file_cache_create_key(ngx_http_request_t *r);
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143 ngx_int_t ngx_http_file_cache_open(ngx_http_request_t *r);
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144 void ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf);
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145 void ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf);
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146 ngx_int_t ngx_http_cache_send(ngx_http_request_t *);
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590
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147 void ngx_http_file_cache_free(ngx_http_cache_t *c, ngx_temp_file_t *tf);
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464
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148 time_t ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status);
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0
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149
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464
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150 char *ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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151 void *conf);
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152 char *ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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153 void *conf);
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18
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154
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572
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155
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502
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156 extern ngx_str_t ngx_http_cache_status[];
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157
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0
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158
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159 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */
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