annotate src/stream/ngx_stream_upstream_zone_module.c @ 6198:311d232ad803

Upstream: fixed shared upstreams on win32.
author Ruslan Ermilov <ru@nginx.com>
date Tue, 16 Jun 2015 00:43:00 +0300
parents 68c106e6fa0a
children 341e4303d25b
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1
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2 /*
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3 * Copyright (C) Ruslan Ermilov
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4 * Copyright (C) Nginx, Inc.
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_stream.h>
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11
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12
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13 static char *ngx_stream_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd,
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14 void *conf);
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15 static ngx_int_t ngx_stream_upstream_init_zone(ngx_shm_zone_t *shm_zone,
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16 void *data);
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17 static ngx_stream_upstream_rr_peers_t *ngx_stream_upstream_zone_copy_peers(
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18 ngx_slab_pool_t *shpool, ngx_stream_upstream_srv_conf_t *uscf);
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19
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20
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21 static ngx_command_t ngx_stream_upstream_zone_commands[] = {
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22
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23 { ngx_string("zone"),
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24 NGX_STREAM_UPS_CONF|NGX_CONF_TAKE12,
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25 ngx_stream_upstream_zone,
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26 0,
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27 0,
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28 NULL },
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29
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30 ngx_null_command
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31 };
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32
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33
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34 static ngx_stream_module_t ngx_stream_upstream_zone_module_ctx = {
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35 NULL, /* postconfiguration */
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36
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37 NULL, /* create main configuration */
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38 NULL, /* init main configuration */
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39
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40 NULL, /* create server configuration */
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41 NULL, /* merge server configuration */
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42 };
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43
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44
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45 ngx_module_t ngx_stream_upstream_zone_module = {
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46 NGX_MODULE_V1,
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47 &ngx_stream_upstream_zone_module_ctx, /* module context */
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48 ngx_stream_upstream_zone_commands, /* module directives */
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49 NGX_STREAM_MODULE, /* module type */
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50 NULL, /* init master */
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51 NULL, /* init module */
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52 NULL, /* init process */
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53 NULL, /* init thread */
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54 NULL, /* exit thread */
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55 NULL, /* exit process */
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56 NULL, /* exit master */
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57 NGX_MODULE_V1_PADDING
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58 };
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60
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61 static char *
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62 ngx_stream_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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63 {
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64 ssize_t size;
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65 ngx_str_t *value;
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66 ngx_stream_upstream_srv_conf_t *uscf;
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67 ngx_stream_upstream_main_conf_t *umcf;
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68
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69 uscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_upstream_module);
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70 umcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_upstream_module);
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71
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72 value = cf->args->elts;
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73
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74 if (!value[1].len) {
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75 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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76 "invalid zone name \"%V\"", &value[1]);
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77 return NGX_CONF_ERROR;
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78 }
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79
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80 if (cf->args->nelts == 3) {
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81 size = ngx_parse_size(&value[2]);
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82
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83 if (size == NGX_ERROR) {
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84 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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85 "invalid zone size \"%V\"", &value[2]);
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86 return NGX_CONF_ERROR;
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87 }
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88
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89 if (size < (ssize_t) (8 * ngx_pagesize)) {
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90 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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91 "zone \"%V\" is too small", &value[1]);
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92 return NGX_CONF_ERROR;
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93 }
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94
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95 } else {
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96 size = 0;
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97 }
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98
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99 uscf->shm_zone = ngx_shared_memory_add(cf, &value[1], size,
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100 &ngx_stream_upstream_module);
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101 if (uscf->shm_zone == NULL) {
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102 return NGX_CONF_ERROR;
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103 }
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104
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105 uscf->shm_zone->init = ngx_stream_upstream_init_zone;
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106 uscf->shm_zone->data = umcf;
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107
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108 uscf->shm_zone->noreuse = 1;
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109
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110 return NGX_CONF_OK;
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111 }
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112
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113
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114 static ngx_int_t
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115 ngx_stream_upstream_init_zone(ngx_shm_zone_t *shm_zone, void *data)
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116 {
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117 size_t len;
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118 ngx_uint_t i;
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119 ngx_slab_pool_t *shpool;
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120 ngx_stream_upstream_rr_peers_t *peers, **peersp;
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121 ngx_stream_upstream_srv_conf_t *uscf, **uscfp;
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122 ngx_stream_upstream_main_conf_t *umcf;
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123
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124 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
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125 umcf = shm_zone->data;
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126 uscfp = umcf->upstreams.elts;
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127
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128 if (shm_zone->shm.exists) {
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129 peers = shpool->data;
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130
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131 for (i = 0; i < umcf->upstreams.nelts; i++) {
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132 uscf = uscfp[i];
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133
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134 if (uscf->shm_zone != shm_zone) {
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135 continue;
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136 }
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137
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138 uscf->peer.data = peers;
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139 peers = peers->zone_next;
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140 }
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141
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142 return NGX_OK;
6115
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diff changeset
143 }
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144
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145 len = sizeof(" in upstream zone \"\"") + shm_zone->shm.name.len;
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146
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147 shpool->log_ctx = ngx_slab_alloc(shpool, len);
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148 if (shpool->log_ctx == NULL) {
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149 return NGX_ERROR;
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parents:
diff changeset
150 }
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parents:
diff changeset
151
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Ruslan Ermilov <ru@nginx.com>
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diff changeset
152 ngx_sprintf(shpool->log_ctx, " in upstream zone \"%V\"%Z",
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parents:
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153 &shm_zone->shm.name);
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parents:
diff changeset
154
6123
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
155
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
156 /* copy peers to shared memory */
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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157
6198
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diff changeset
158 peersp = (ngx_stream_upstream_rr_peers_t **) &shpool->data;
6123
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159
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
160 for (i = 0; i < umcf->upstreams.nelts; i++) {
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
161 uscf = uscfp[i];
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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162
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
163 if (uscf->shm_zone != shm_zone) {
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
164 continue;
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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parents: 6115
diff changeset
165 }
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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166
6198
311d232ad803 Upstream: fixed shared upstreams on win32.
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diff changeset
167 peers = ngx_stream_upstream_zone_copy_peers(shpool, uscf);
311d232ad803 Upstream: fixed shared upstreams on win32.
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diff changeset
168 if (peers == NULL) {
6123
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
169 return NGX_ERROR;
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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170 }
6198
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diff changeset
171
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diff changeset
172 *peersp = peers;
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173 peersp = &peers->zone_next;
6123
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
174 }
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
175
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
176 return NGX_OK;
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parents: 6115
diff changeset
177 }
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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parents: 6115
diff changeset
178
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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179
6198
311d232ad803 Upstream: fixed shared upstreams on win32.
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diff changeset
180 static ngx_stream_upstream_rr_peers_t *
6123
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
181 ngx_stream_upstream_zone_copy_peers(ngx_slab_pool_t *shpool,
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
182 ngx_stream_upstream_srv_conf_t *uscf)
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
183 {
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
184 ngx_stream_upstream_rr_peer_t *peer, **peerp;
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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diff changeset
185 ngx_stream_upstream_rr_peers_t *peers, *backup;
caa103acf180 Upstream: allow multiple upstreams to use the same shared zone.
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parents: 6115
diff changeset
186
6115
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Ruslan Ermilov <ru@nginx.com>
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diff changeset
187 peers = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t));
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parents:
diff changeset
188 if (peers == NULL) {
6198
311d232ad803 Upstream: fixed shared upstreams on win32.
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parents: 6174
diff changeset
189 return NULL;
6115
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Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
190 }
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
191
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Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
192 ngx_memcpy(peers, uscf->peer.data, sizeof(ngx_stream_upstream_rr_peers_t));
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Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
193
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
194 peers->shpool = shpool;
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
195
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Ruslan Ermilov <ru@nginx.com>
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diff changeset
196 for (peerp = &peers->peer; *peerp; peerp = &peer->next) {
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parents:
diff changeset
197 /* pool is unlocked */
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Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
198 peer = ngx_slab_calloc_locked(shpool,
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
199 sizeof(ngx_stream_upstream_rr_peer_t));
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
200 if (peer == NULL) {
6198
311d232ad803 Upstream: fixed shared upstreams on win32.
Ruslan Ermilov <ru@nginx.com>
parents: 6174
diff changeset
201 return NULL;
6115
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
202 }
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
203
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
204 ngx_memcpy(peer, *peerp, sizeof(ngx_stream_upstream_rr_peer_t));
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
205
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
206 *peerp = peer;
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
207 }
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
208
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
209 if (peers->next == NULL) {
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
210 goto done;
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
211 }
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
212
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
213 backup = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t));
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
214 if (backup == NULL) {
6198
311d232ad803 Upstream: fixed shared upstreams on win32.
Ruslan Ermilov <ru@nginx.com>
parents: 6174
diff changeset
215 return NULL;
6115
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
216 }
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
217
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
218 ngx_memcpy(backup, peers->next, sizeof(ngx_stream_upstream_rr_peers_t));
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
219
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
220 backup->shpool = shpool;
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
221
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
222 for (peerp = &backup->peer; *peerp; peerp = &peer->next) {
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
223 /* pool is unlocked */
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
224 peer = ngx_slab_calloc_locked(shpool,
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
225 sizeof(ngx_stream_upstream_rr_peer_t));
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
226 if (peer == NULL) {
6198
311d232ad803 Upstream: fixed shared upstreams on win32.
Ruslan Ermilov <ru@nginx.com>
parents: 6174
diff changeset
227 return NULL;
6115
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
228 }
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
229
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
230 ngx_memcpy(peer, *peerp, sizeof(ngx_stream_upstream_rr_peer_t));
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
231
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
232 *peerp = peer;
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
233 }
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
234
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
235 peers->next = backup;
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
236
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
237 done:
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
238
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
239 uscf->peer.data = peers;
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
240
6198
311d232ad803 Upstream: fixed shared upstreams on win32.
Ruslan Ermilov <ru@nginx.com>
parents: 6174
diff changeset
241 return peers;
6115
61d7ae76647d Stream: port from NGINX+.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
242 }