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annotate src/http/ngx_http_upstream_round_robin.h @ 6713:63b8b157b776

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Modules compatibility: down flag promoted to a bitmask. It is to be used as a bitmask with various bits set/reset when appropriate. Any bit set means that the peer should not be used, that is, exactly what current checks do, no additional changes required.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 29 Sep 2016 18:06:05 +0300
parents fd5c2781460b
children d200a0fd00b7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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)
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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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56 typedef struct ngx_http_upstream_rr_peers_s ngx_http_upstream_rr_peers_t;
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57
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58 struct ngx_http_upstream_rr_peers_s {
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59 ngx_uint_t number;
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60
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61 #if (NGX_HTTP_UPSTREAM_ZONE)
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62 ngx_slab_pool_t *shpool;
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63 ngx_atomic_t rwlock;
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64 ngx_http_upstream_rr_peers_t *zone_next;
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65 #endif
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66
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67 ngx_uint_t total_weight;
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68
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69 unsigned single:1;
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70 unsigned weighted:1;
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71
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72 ngx_str_t *name;
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73
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74 ngx_http_upstream_rr_peers_t *next;
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75
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76 ngx_http_upstream_rr_peer_t *peer;
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77 };
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79
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80 #if (NGX_HTTP_UPSTREAM_ZONE)
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81
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82 #define ngx_http_upstream_rr_peers_rlock(peers) \
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83 \
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84 if (peers->shpool) { \
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85 ngx_rwlock_rlock(&peers->rwlock); \
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86 }
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87
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88 #define ngx_http_upstream_rr_peers_wlock(peers) \
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89 \
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90 if (peers->shpool) { \
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91 ngx_rwlock_wlock(&peers->rwlock); \
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92 }
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93
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94 #define ngx_http_upstream_rr_peers_unlock(peers) \
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95 \
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96 if (peers->shpool) { \
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97 ngx_rwlock_unlock(&peers->rwlock); \
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98 }
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99
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100
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101 #define ngx_http_upstream_rr_peer_lock(peers, peer) \
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102 \
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103 if (peers->shpool) { \
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104 ngx_rwlock_wlock(&peer->lock); \
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105 }
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106
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107 #define ngx_http_upstream_rr_peer_unlock(peers, peer) \
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108 \
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109 if (peers->shpool) { \
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110 ngx_rwlock_unlock(&peer->lock); \
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111 }
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112
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113 #else
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114
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115 #define ngx_http_upstream_rr_peers_rlock(peers)
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116 #define ngx_http_upstream_rr_peers_wlock(peers)
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117 #define ngx_http_upstream_rr_peers_unlock(peers)
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118 #define ngx_http_upstream_rr_peer_lock(peers, peer)
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119 #define ngx_http_upstream_rr_peer_unlock(peers, peer)
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120
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121 #endif
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122
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123
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124 typedef struct {
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125 ngx_uint_t config;
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126 ngx_http_upstream_rr_peers_t *peers;
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127 ngx_http_upstream_rr_peer_t *current;
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128 uintptr_t *tried;
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129 uintptr_t data;
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130 } ngx_http_upstream_rr_peer_data_t;
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131
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132
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133 ngx_int_t ngx_http_upstream_init_round_robin(ngx_conf_t *cf,
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134 ngx_http_upstream_srv_conf_t *us);
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135 ngx_int_t ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r,
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136 ngx_http_upstream_srv_conf_t *us);
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137 ngx_int_t ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r,
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138 ngx_http_upstream_resolved_t *ur);
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139 ngx_int_t ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc,
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140 void *data);
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141 void ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc,
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142 void *data, ngx_uint_t state);
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143
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144 #if (NGX_HTTP_SSL)
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145 ngx_int_t
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146 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc,
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147 void *data);
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148 void ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc,
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149 void *data);
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150 #endif
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151
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152
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153 #endif /* _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ */