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annotate src/http/ngx_http_upstream_round_robin.h @ 7690:8253424d1aff

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Added size check to ngx_http_alloc_large_header_buffer(). This ensures that copying won't write more than the buffer size even if the buffer comes from hc->free and it is smaller than the large client header buffer size in the virtual host configuration. This might happen if size of large client header buffers is different in name-based virtual hosts, similarly to the problem with number of buffers fixed in 6926:e662cbf1b932.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 06 Aug 2020 05:02:22 +0300
parents e38e9c50a40e
children 90cc7194e993
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1
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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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6
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7
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8 #ifndef _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_
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9 #define _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_
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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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17 typedef struct ngx_http_upstream_rr_peer_s ngx_http_upstream_rr_peer_t;
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18
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19 struct ngx_http_upstream_rr_peer_s {
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20 struct sockaddr *sockaddr;
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21 socklen_t socklen;
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22 ngx_str_t name;
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23 ngx_str_t server;
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24
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25 ngx_int_t current_weight;
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26 ngx_int_t effective_weight;
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27 ngx_int_t weight;
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28
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29 ngx_uint_t conns;
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30 ngx_uint_t max_conns;
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31
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32 ngx_uint_t fails;
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33 time_t accessed;
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34 time_t checked;
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35
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36 ngx_uint_t max_fails;
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37 time_t fail_timeout;
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38 ngx_msec_t slow_start;
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39 ngx_msec_t start_time;
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40
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41 ngx_uint_t down;
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42
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43 #if (NGX_HTTP_SSL || NGX_COMPAT)
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44 void *ssl_session;
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45 int ssl_session_len;
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46 #endif
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47
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48 #if (NGX_HTTP_UPSTREAM_ZONE)
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49 ngx_atomic_t lock;
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50 #endif
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51
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52 ngx_http_upstream_rr_peer_t *next;
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53
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54 NGX_COMPAT_BEGIN(32)
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55 NGX_COMPAT_END
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56 };
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59 typedef struct ngx_http_upstream_rr_peers_s ngx_http_upstream_rr_peers_t;
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60
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61 struct ngx_http_upstream_rr_peers_s {
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62 ngx_uint_t number;
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63
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64 #if (NGX_HTTP_UPSTREAM_ZONE)
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65 ngx_slab_pool_t *shpool;
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66 ngx_atomic_t rwlock;
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67 ngx_http_upstream_rr_peers_t *zone_next;
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68 #endif
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69
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70 ngx_uint_t total_weight;
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71
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72 unsigned single:1;
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73 unsigned weighted:1;
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74
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75 ngx_str_t *name;
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76
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77 ngx_http_upstream_rr_peers_t *next;
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78
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79 ngx_http_upstream_rr_peer_t *peer;
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80 };
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83 #if (NGX_HTTP_UPSTREAM_ZONE)
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84
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85 #define ngx_http_upstream_rr_peers_rlock(peers) \
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86 \
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87 if (peers->shpool) { \
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88 ngx_rwlock_rlock(&peers->rwlock); \
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89 }
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90
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91 #define ngx_http_upstream_rr_peers_wlock(peers) \
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92 \
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93 if (peers->shpool) { \
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94 ngx_rwlock_wlock(&peers->rwlock); \
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95 }
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96
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97 #define ngx_http_upstream_rr_peers_unlock(peers) \
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98 \
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99 if (peers->shpool) { \
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100 ngx_rwlock_unlock(&peers->rwlock); \
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101 }
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102
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103
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104 #define ngx_http_upstream_rr_peer_lock(peers, peer) \
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105 \
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106 if (peers->shpool) { \
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107 ngx_rwlock_wlock(&peer->lock); \
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108 }
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109
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110 #define ngx_http_upstream_rr_peer_unlock(peers, peer) \
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111 \
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112 if (peers->shpool) { \
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113 ngx_rwlock_unlock(&peer->lock); \
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114 }
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115
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116 #else
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117
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118 #define ngx_http_upstream_rr_peers_rlock(peers)
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119 #define ngx_http_upstream_rr_peers_wlock(peers)
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120 #define ngx_http_upstream_rr_peers_unlock(peers)
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121 #define ngx_http_upstream_rr_peer_lock(peers, peer)
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122 #define ngx_http_upstream_rr_peer_unlock(peers, peer)
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123
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124 #endif
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125
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126
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127 typedef struct {
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128 ngx_uint_t config;
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129 ngx_http_upstream_rr_peers_t *peers;
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130 ngx_http_upstream_rr_peer_t *current;
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131 uintptr_t *tried;
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132 uintptr_t data;
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133 } ngx_http_upstream_rr_peer_data_t;
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134
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135
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136 ngx_int_t ngx_http_upstream_init_round_robin(ngx_conf_t *cf,
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137 ngx_http_upstream_srv_conf_t *us);
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138 ngx_int_t ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r,
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139 ngx_http_upstream_srv_conf_t *us);
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140 ngx_int_t ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r,
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141 ngx_http_upstream_resolved_t *ur);
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142 ngx_int_t ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc,
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143 void *data);
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144 void ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc,
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145 void *data, ngx_uint_t state);
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146
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147 #if (NGX_HTTP_SSL)
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148 ngx_int_t
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149 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc,
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150 void *data);
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151 void ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc,
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152 void *data);
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153 #endif
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154
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155
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156 #endif /* _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ */