260
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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372
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12 static ngx_int_t ngx_http_upstream_cmp_servers(const void *one,
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13 const void *two);
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324
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14 static ngx_uint_t
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15 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers);
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16
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17
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260
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18 ngx_int_t
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19 ngx_http_upstream_init_round_robin(ngx_conf_t *cf,
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20 ngx_http_upstream_srv_conf_t *us)
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21 {
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22 ngx_url_t u;
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23 ngx_uint_t i, j, n;
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24 ngx_http_upstream_server_t *server;
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326
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25 ngx_http_upstream_rr_peers_t *peers, *backup;
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260
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26
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27 us->peer.init = ngx_http_upstream_init_round_robin_peer;
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28
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29 if (us->servers) {
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30 server = us->servers->elts;
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31
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326
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32 n = 0;
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33
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260
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34 for (i = 0; i < us->servers->nelts; i++) {
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326
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35 if (server[i].backup) {
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36 continue;
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37 }
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38
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260
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39 n += server[i].naddrs;
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40 }
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41
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42 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)
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43 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1));
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44 if (peers == NULL) {
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45 return NGX_ERROR;
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46 }
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47
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326
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48 peers->single = (n == 1);
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260
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49 peers->number = n;
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50 peers->name = &us->host;
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51
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52 n = 0;
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53
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54 for (i = 0; i < us->servers->nelts; i++) {
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55 for (j = 0; j < server[i].naddrs; j++) {
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326
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56 if (server[i].backup) {
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57 continue;
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58 }
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59
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260
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60 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr;
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61 peers->peer[n].socklen = server[i].addrs[j].socklen;
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62 peers->peer[n].name = server[i].addrs[j].name;
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63 peers->peer[n].max_fails = server[i].max_fails;
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64 peers->peer[n].fail_timeout = server[i].fail_timeout;
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65 peers->peer[n].down = server[i].down;
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326
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66 peers->peer[n].weight = server[i].down ? 0 : server[i].weight;
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67 peers->peer[n].current_weight = peers->peer[n].weight;
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260
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68 n++;
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69 }
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70 }
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71
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72 us->peer.data = peers;
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73
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326
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74 ngx_sort(&peers->peer[0], (size_t) n,
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75 sizeof(ngx_http_upstream_rr_peer_t),
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76 ngx_http_upstream_cmp_servers);
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77
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78 /* backup servers */
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79
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80 n = 0;
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81
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82 for (i = 0; i < us->servers->nelts; i++) {
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83 if (!server[i].backup) {
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84 continue;
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85 }
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86
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87 n += server[i].naddrs;
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88 }
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89
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90 if (n == 0) {
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91 return NGX_OK;
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92 }
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93
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94 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)
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95 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1));
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96 if (backup == NULL) {
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97 return NGX_ERROR;
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98 }
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99
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100 peers->single = 0;
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101 backup->single = 0;
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102 backup->number = n;
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103 backup->name = &us->host;
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104
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105 n = 0;
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106
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107 for (i = 0; i < us->servers->nelts; i++) {
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108 for (j = 0; j < server[i].naddrs; j++) {
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109 if (!server[i].backup) {
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110 continue;
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111 }
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112
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113 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr;
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114 backup->peer[n].socklen = server[i].addrs[j].socklen;
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115 backup->peer[n].name = server[i].addrs[j].name;
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116 backup->peer[n].weight = server[i].weight;
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117 backup->peer[n].current_weight = server[i].weight;
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118 backup->peer[n].max_fails = server[i].max_fails;
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119 backup->peer[n].fail_timeout = server[i].fail_timeout;
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120 backup->peer[n].down = server[i].down;
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121 n++;
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122 }
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123 }
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124
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125 peers->next = backup;
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126
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127 ngx_sort(&backup->peer[0], (size_t) n,
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128 sizeof(ngx_http_upstream_rr_peer_t),
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129 ngx_http_upstream_cmp_servers);
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130
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260
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131 return NGX_OK;
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132 }
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133
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134
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135 /* an upstream implicitly defined by proxy_pass, etc. */
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136
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266
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137 if (us->port == 0 && us->default_port == 0) {
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138 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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139 "no port in upstream \"%V\" in %s:%ui",
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336
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140 &us->host, us->file_name, us->line);
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266
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141 return NGX_ERROR;
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142 }
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143
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260
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144 ngx_memzero(&u, sizeof(ngx_url_t));
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145
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146 u.host = us->host;
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266
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147 u.port = (in_port_t) (us->port ? us->port : us->default_port);
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260
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148
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340
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149 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) {
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260
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150 if (u.err) {
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151 ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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262
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152 "%s in upstream \"%V\" in %s:%ui",
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336
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153 u.err, &us->host, us->file_name, us->line);
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260
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154 }
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155
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156 return NGX_ERROR;
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157 }
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158
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159 n = u.naddrs;
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160
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161 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t)
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162 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1));
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163 if (peers == NULL) {
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164 return NGX_ERROR;
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165 }
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166
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326
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167 peers->single = (n == 1);
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260
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168 peers->number = n;
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169 peers->name = &us->host;
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170
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171 for (i = 0; i < u.naddrs; i++) {
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340
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172 peers->peer[i].sockaddr = u.addrs[i].sockaddr;
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173 peers->peer[i].socklen = u.addrs[i].socklen;
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174 peers->peer[i].name = u.addrs[i].name;
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175 peers->peer[i].weight = 1;
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176 peers->peer[i].current_weight = 1;
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177 peers->peer[i].max_fails = 1;
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178 peers->peer[i].fail_timeout = 10;
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260
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179 }
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180
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181 us->peer.data = peers;
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182
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326
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183 /* implicitly defined upstream has no backup servers */
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184
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260
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185 return NGX_OK;
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186 }
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187
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188
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372
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189 static ngx_int_t
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326
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190 ngx_http_upstream_cmp_servers(const void *one, const void *two)
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191 {
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192 ngx_http_upstream_rr_peer_t *first, *second;
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193
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194 first = (ngx_http_upstream_rr_peer_t *) one;
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195 second = (ngx_http_upstream_rr_peer_t *) two;
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196
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197 return (first->weight < second->weight);
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198 }
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199
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200
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260
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201 ngx_int_t
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202 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r,
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203 ngx_http_upstream_srv_conf_t *us)
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204 {
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205 ngx_uint_t n;
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206 ngx_http_upstream_rr_peer_data_t *rrp;
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207
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208 rrp = r->upstream->peer.data;
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209
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210 if (rrp == NULL) {
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211 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t));
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212 if (rrp == NULL) {
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213 return NGX_ERROR;
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214 }
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215
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216 r->upstream->peer.data = rrp;
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217 }
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218
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219 rrp->peers = us->peer.data;
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220 rrp->current = 0;
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221
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222 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) {
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223 rrp->tried = &rrp->data;
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224 rrp->data = 0;
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225
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226 } else {
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227 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1))
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228 / (8 * sizeof(uintptr_t));
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229
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230 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t));
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231 if (rrp->tried == NULL) {
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232 return NGX_ERROR;
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233 }
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234 }
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235
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236 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer;
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237 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer;
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238 r->upstream->peer.tries = rrp->peers->number;
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239 #if (NGX_HTTP_SSL)
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318
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240 r->upstream->peer.set_session =
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241 ngx_http_upstream_set_round_robin_peer_session;
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242 r->upstream->peer.save_session =
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243 ngx_http_upstream_save_round_robin_peer_session;
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260
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244 #endif
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245
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246 return NGX_OK;
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247 }
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248
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249
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250 ngx_int_t
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348
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251 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r,
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252 ngx_http_upstream_resolved_t *ur)
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253 {
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254 u_char *p;
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255 size_t len;
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256 ngx_uint_t i, n;
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257 struct sockaddr_in *sin;
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258 ngx_http_upstream_rr_peers_t *peers;
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259 ngx_http_upstream_rr_peer_data_t *rrp;
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260
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261 rrp = r->upstream->peer.data;
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262
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263 if (rrp == NULL) {
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264 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t));
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265 if (rrp == NULL) {
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266 return NGX_ERROR;
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267 }
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268
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269 r->upstream->peer.data = rrp;
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270 }
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271
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272 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t)
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273 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1));
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274 if (peers == NULL) {
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275 return NGX_ERROR;
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276 }
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277
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278 peers->single = (ur->naddrs == 1);
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279 peers->number = ur->naddrs;
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280 peers->name = &ur->host;
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281
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463
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282 if (ur->sockaddr) {
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283 peers->peer[0].sockaddr = ur->sockaddr;
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284 peers->peer[0].socklen = ur->socklen;
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285 peers->peer[0].name = ur->host;
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286 peers->peer[0].weight = 1;
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287 peers->peer[0].current_weight = 1;
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288 peers->peer[0].max_fails = 1;
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289 peers->peer[0].fail_timeout = 10;
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348
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290
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463
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291 } else {
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292
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293 for (i = 0; i < ur->naddrs; i++) {
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348
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294
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463
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295 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1;
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296
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297 p = ngx_pnalloc(r->pool, len);
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298 if (p == NULL) {
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299 return NGX_ERROR;
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300 }
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348
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301
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463
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302 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN);
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303 len = ngx_sprintf(&p[len], ":%d", ur->port) - p;
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348
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304
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463
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305 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in));
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306 if (sin == NULL) {
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307 return NGX_ERROR;
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308 }
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348
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309
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463
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310 sin->sin_family = AF_INET;
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311 sin->sin_port = htons(ur->port);
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312 sin->sin_addr.s_addr = ur->addrs[i];
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313
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314 peers->peer[i].sockaddr = (struct sockaddr *) sin;
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315 peers->peer[i].socklen = sizeof(struct sockaddr_in);
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316 peers->peer[i].name.len = len;
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317 peers->peer[i].name.data = p;
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318 peers->peer[i].weight = 1;
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319 peers->peer[i].current_weight = 1;
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320 peers->peer[i].max_fails = 1;
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321 peers->peer[i].fail_timeout = 10;
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322 }
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348
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323 }
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324
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325 rrp->peers = peers;
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326 rrp->current = 0;
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327
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328 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) {
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329 rrp->tried = &rrp->data;
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330 rrp->data = 0;
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331
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332 } else {
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333 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1))
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334 / (8 * sizeof(uintptr_t));
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335
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336 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t));
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337 if (rrp->tried == NULL) {
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338 return NGX_ERROR;
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339 }
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340 }
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341
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342 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer;
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343 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer;
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344 r->upstream->peer.tries = rrp->peers->number;
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345 #if (NGX_HTTP_SSL)
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346 r->upstream->peer.set_session =
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347 ngx_http_upstream_set_round_robin_peer_session;
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348 r->upstream->peer.save_session =
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349 ngx_http_upstream_save_round_robin_peer_session;
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350 #endif
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351
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352 return NGX_OK;
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353 }
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354
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355
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356 ngx_int_t
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260
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357 ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data)
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358 {
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359 ngx_http_upstream_rr_peer_data_t *rrp = data;
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360
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326
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361 time_t now;
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362 uintptr_t m;
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363 ngx_int_t rc;
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364 ngx_uint_t i, n;
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365 ngx_connection_t *c;
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366 ngx_http_upstream_rr_peer_t *peer;
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367 ngx_http_upstream_rr_peers_t *peers;
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260
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368
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369 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0,
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370 "get rr peer, try: %ui", pc->tries);
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371
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372 now = ngx_time();
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373
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374 /* ngx_lock_mutex(rrp->peers->mutex); */
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375
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376 if (rrp->peers->last_cached) {
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377
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378 /* cached connection */
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379
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380 c = rrp->peers->cached[rrp->peers->last_cached];
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381 rrp->peers->last_cached--;
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382
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383 /* ngx_unlock_mutex(ppr->peers->mutex); */
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384
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385 #if (NGX_THREADS)
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386 c->read->lock = c->read->own_lock;
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387 c->write->lock = c->write->own_lock;
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388 #endif
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389
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390 pc->connection = c;
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391 pc->cached = 1;
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392
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393 return NGX_OK;
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394 }
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395
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396 pc->cached = 0;
|
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397 pc->connection = NULL;
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398
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326
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399 if (rrp->peers->single) {
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260
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400 peer = &rrp->peers->peer[0];
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401
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402 } else {
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403
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404 /* there are several peers */
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405
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406 if (pc->tries == rrp->peers->number) {
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407
|
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408 /* it's a first try - get a current peer */
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409
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330
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410 i = pc->tries;
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411
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260
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412 for ( ;; ) {
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324
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413 rrp->current = ngx_http_upstream_get_peer(rrp->peers);
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414
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415 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
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416 "get rr peer, current: %ui %i",
|
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417 rrp->current,
|
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418 rrp->peers->peer[rrp->current].current_weight);
|
260
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419
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420 n = rrp->current / (8 * sizeof(uintptr_t));
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302
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421 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t));
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260
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422
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423 if (!(rrp->tried[n] & m)) {
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424 peer = &rrp->peers->peer[rrp->current];
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425
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426 if (!peer->down) {
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427
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428 if (peer->max_fails == 0
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429 || peer->fails < peer->max_fails)
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430 {
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431 break;
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432 }
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433
|
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434 if (now - peer->accessed > peer->fail_timeout) {
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435 peer->fails = 0;
|
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436 break;
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437 }
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438
|
324
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439 peer->current_weight = 0;
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440
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260
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441 } else {
|
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442 rrp->tried[n] |= m;
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443 }
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444
|
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445 pc->tries--;
|
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446 }
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447
|
330
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448 if (pc->tries == 0) {
|
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449 goto failed;
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260
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450 }
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451
|
330
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452 if (--i == 0) {
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453 ngx_log_error(NGX_LOG_ALERT, pc->log, 0,
|
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454 "round robin upstream stuck on %ui tries",
|
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455 pc->tries);
|
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456 goto failed;
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457 }
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260
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458 }
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459
|
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460 peer->current_weight--;
|
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461
|
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462 } else {
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330
|
463
|
|
464 i = pc->tries;
|
|
465
|
260
|
466 for ( ;; ) {
|
|
467 n = rrp->current / (8 * sizeof(uintptr_t));
|
302
|
468 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t));
|
260
|
469
|
|
470 if (!(rrp->tried[n] & m)) {
|
|
471
|
|
472 peer = &rrp->peers->peer[rrp->current];
|
|
473
|
|
474 if (!peer->down) {
|
|
475
|
|
476 if (peer->max_fails == 0
|
|
477 || peer->fails < peer->max_fails)
|
|
478 {
|
|
479 break;
|
|
480 }
|
|
481
|
|
482 if (now - peer->accessed > peer->fail_timeout) {
|
|
483 peer->fails = 0;
|
|
484 break;
|
|
485 }
|
|
486
|
324
|
487 peer->current_weight = 0;
|
|
488
|
260
|
489 } else {
|
|
490 rrp->tried[n] |= m;
|
|
491 }
|
|
492
|
|
493 pc->tries--;
|
|
494 }
|
|
495
|
|
496 rrp->current++;
|
|
497
|
|
498 if (rrp->current >= rrp->peers->number) {
|
|
499 rrp->current = 0;
|
|
500 }
|
|
501
|
330
|
502 if (pc->tries == 0) {
|
|
503 goto failed;
|
260
|
504 }
|
|
505
|
330
|
506 if (--i == 0) {
|
|
507 ngx_log_error(NGX_LOG_ALERT, pc->log, 0,
|
|
508 "round robin upstream stuck on %ui tries",
|
|
509 pc->tries);
|
|
510 goto failed;
|
|
511 }
|
260
|
512 }
|
|
513
|
|
514 peer->current_weight--;
|
|
515 }
|
|
516
|
|
517 rrp->tried[n] |= m;
|
|
518 }
|
|
519
|
|
520 pc->sockaddr = peer->sockaddr;
|
|
521 pc->socklen = peer->socklen;
|
|
522 pc->name = &peer->name;
|
|
523
|
|
524 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
525
|
326
|
526 if (pc->tries == 1 && rrp->peers->next) {
|
|
527 pc->tries += rrp->peers->next->number;
|
|
528
|
|
529 n = rrp->peers->next->number / (8 * sizeof(uintptr_t)) + 1;
|
|
530 for (i = 0; i < n; i++) {
|
|
531 rrp->tried[i] = 0;
|
|
532 }
|
|
533 }
|
|
534
|
260
|
535 return NGX_OK;
|
|
536
|
|
537 failed:
|
|
538
|
326
|
539 peers = rrp->peers;
|
|
540
|
|
541 if (peers->next) {
|
|
542
|
|
543 /* ngx_unlock_mutex(peers->mutex); */
|
|
544
|
|
545 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers");
|
|
546
|
|
547 rrp->peers = peers->next;
|
|
548 pc->tries = rrp->peers->number;
|
|
549
|
|
550 n = rrp->peers->number / (8 * sizeof(uintptr_t)) + 1;
|
|
551 for (i = 0; i < n; i++) {
|
|
552 rrp->tried[i] = 0;
|
|
553 }
|
|
554
|
|
555 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp);
|
|
556
|
|
557 if (rc != NGX_BUSY) {
|
|
558 return rc;
|
|
559 }
|
|
560
|
|
561 /* ngx_lock_mutex(peers->mutex); */
|
|
562 }
|
|
563
|
260
|
564 /* all peers failed, mark them as live for quick recovery */
|
|
565
|
326
|
566 for (i = 0; i < peers->number; i++) {
|
|
567 peers->peer[i].fails = 0;
|
260
|
568 }
|
|
569
|
326
|
570 /* ngx_unlock_mutex(peers->mutex); */
|
260
|
571
|
326
|
572 pc->name = peers->name;
|
260
|
573
|
|
574 return NGX_BUSY;
|
|
575 }
|
|
576
|
|
577
|
324
|
578 static ngx_uint_t
|
|
579 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers)
|
|
580 {
|
|
581 ngx_uint_t i, n;
|
|
582 ngx_http_upstream_rr_peer_t *peer;
|
|
583
|
|
584 peer = &peers->peer[0];
|
|
585
|
|
586 for ( ;; ) {
|
|
587
|
|
588 for (i = 0; i < peers->number; i++) {
|
|
589
|
|
590 if (peer[i].current_weight <= 0) {
|
|
591 continue;
|
|
592 }
|
|
593
|
|
594 n = i;
|
|
595
|
|
596 while (i < peers->number - 1) {
|
|
597
|
|
598 i++;
|
|
599
|
|
600 if (peer[i].current_weight <= 0) {
|
|
601 continue;
|
|
602 }
|
|
603
|
|
604 if (peer[n].current_weight * 1000 / peer[i].current_weight
|
336
|
605 > peer[n].weight * 1000 / peer[i].weight)
|
324
|
606 {
|
|
607 return n;
|
|
608 }
|
|
609
|
|
610 n = i;
|
|
611 }
|
|
612
|
|
613 if (peer[i].current_weight > 0) {
|
|
614 n = i;
|
|
615 }
|
|
616
|
|
617 return n;
|
|
618 }
|
|
619
|
|
620 for (i = 0; i < peers->number; i++) {
|
364
|
621 peer[i].current_weight = peer[i].weight;
|
324
|
622 }
|
|
623 }
|
|
624 }
|
|
625
|
|
626
|
260
|
627 void
|
|
628 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data,
|
|
629 ngx_uint_t state)
|
|
630 {
|
|
631 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
632
|
|
633 time_t now;
|
|
634 ngx_http_upstream_rr_peer_t *peer;
|
|
635
|
|
636 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
637 "free rr peer %ui %ui", pc->tries, state);
|
|
638
|
|
639 if (state == 0 && pc->tries == 0) {
|
|
640 return;
|
|
641 }
|
|
642
|
|
643 /* TODO: NGX_PEER_KEEPALIVE */
|
|
644
|
326
|
645 if (rrp->peers->single) {
|
260
|
646 pc->tries = 0;
|
|
647 return;
|
|
648 }
|
|
649
|
|
650 if (state & NGX_PEER_FAILED) {
|
|
651 now = ngx_time();
|
|
652
|
|
653 peer = &rrp->peers->peer[rrp->current];
|
|
654
|
|
655 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
656
|
|
657 peer->fails++;
|
|
658 peer->accessed = now;
|
|
659
|
421
|
660 if (peer->max_fails) {
|
|
661 peer->current_weight -= peer->weight / peer->max_fails;
|
|
662 }
|
324
|
663
|
|
664 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
|
665 "free rr peer failed: %ui %i",
|
|
666 rrp->current, peer->current_weight);
|
|
667
|
|
668 if (peer->current_weight < 0) {
|
|
669 peer->current_weight = 0;
|
260
|
670 }
|
|
671
|
|
672 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
673 }
|
|
674
|
|
675 rrp->current++;
|
|
676
|
|
677 if (rrp->current >= rrp->peers->number) {
|
|
678 rrp->current = 0;
|
|
679 }
|
|
680
|
|
681 if (pc->tries) {
|
|
682 pc->tries--;
|
|
683 }
|
|
684
|
|
685 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
686 }
|
|
687
|
|
688
|
|
689 #if (NGX_HTTP_SSL)
|
|
690
|
318
|
691 ngx_int_t
|
|
692 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc,
|
|
693 void *data)
|
260
|
694 {
|
|
695 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
696
|
318
|
697 ngx_int_t rc;
|
260
|
698 ngx_ssl_session_t *ssl_session;
|
|
699 ngx_http_upstream_rr_peer_t *peer;
|
|
700
|
318
|
701 peer = &rrp->peers->peer[rrp->current];
|
|
702
|
|
703 /* TODO: threads only mutex */
|
|
704 /* ngx_lock_mutex(rrp->peers->mutex); */
|
|
705
|
|
706 ssl_session = peer->ssl_session;
|
|
707
|
|
708 rc = ngx_ssl_set_session(pc->connection, ssl_session);
|
|
709
|
|
710 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
332
|
711 "set session: %p:%d",
|
|
712 ssl_session, ssl_session ? ssl_session->references : 0);
|
318
|
713
|
|
714 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
715
|
|
716 return rc;
|
|
717 }
|
|
718
|
|
719
|
|
720 void
|
|
721 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc,
|
|
722 void *data)
|
|
723 {
|
|
724 ngx_http_upstream_rr_peer_data_t *rrp = data;
|
|
725
|
|
726 ngx_ssl_session_t *old_ssl_session, *ssl_session;
|
|
727 ngx_http_upstream_rr_peer_t *peer;
|
|
728
|
260
|
729 ssl_session = ngx_ssl_get_session(pc->connection);
|
|
730
|
|
731 if (ssl_session == NULL) {
|
|
732 return;
|
|
733 }
|
|
734
|
318
|
735 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
332
|
736 "save session: %p:%d", ssl_session, ssl_session->references);
|
318
|
737
|
260
|
738 peer = &rrp->peers->peer[rrp->current];
|
|
739
|
318
|
740 /* TODO: threads only mutex */
|
260
|
741 /* ngx_lock_mutex(rrp->peers->mutex); */
|
318
|
742
|
|
743 old_ssl_session = peer->ssl_session;
|
260
|
744 peer->ssl_session = ssl_session;
|
318
|
745
|
260
|
746 /* ngx_unlock_mutex(rrp->peers->mutex); */
|
|
747
|
318
|
748 if (old_ssl_session) {
|
|
749
|
|
750 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0,
|
332
|
751 "old session: %p:%d",
|
318
|
752 old_ssl_session, old_ssl_session->references);
|
|
753
|
260
|
754 /* TODO: may block */
|
318
|
755
|
|
756 ngx_ssl_free_session(old_ssl_session);
|
260
|
757 }
|
|
758 }
|
|
759
|
|
760 #endif
|