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