Mercurial > hg > nginx
annotate src/stream/ngx_stream_upstream_zone_module.c @ 7109:4a670c18e5e6
Removed more remnants of the old pthread implementation.
After e284f3ff6831, ngx_crypt() can no longer return NGX_AGAIN.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Mon, 18 Sep 2017 11:09:41 +0300 |
parents | ac120e797d28 |
children | 3b1b81e248bc |
rev | line source |
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6115 | 1 |
2 /* | |
3 * Copyright (C) Ruslan Ermilov | |
4 * Copyright (C) Nginx, Inc. | |
5 */ | |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_stream.h> | |
11 | |
12 | |
13 static char *ngx_stream_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd, | |
14 void *conf); | |
15 static ngx_int_t ngx_stream_upstream_init_zone(ngx_shm_zone_t *shm_zone, | |
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 static ngx_stream_upstream_rr_peer_t *ngx_stream_upstream_zone_copy_peer( |
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20 ngx_stream_upstream_rr_peers_t *peers, ngx_stream_upstream_rr_peer_t *src); |
6115 | 21 |
22 | |
23 static ngx_command_t ngx_stream_upstream_zone_commands[] = { | |
24 | |
25 { ngx_string("zone"), | |
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26 NGX_STREAM_UPS_CONF|NGX_CONF_TAKE12, |
6115 | 27 ngx_stream_upstream_zone, |
28 0, | |
29 0, | |
30 NULL }, | |
31 | |
32 ngx_null_command | |
33 }; | |
34 | |
35 | |
36 static ngx_stream_module_t ngx_stream_upstream_zone_module_ctx = { | |
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37 NULL, /* preconfiguration */ |
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38 NULL, /* postconfiguration */ |
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39 |
6115 | 40 NULL, /* create main configuration */ |
41 NULL, /* init main configuration */ | |
42 | |
43 NULL, /* create server configuration */ | |
6629 | 44 NULL /* merge server configuration */ |
6115 | 45 }; |
46 | |
47 | |
48 ngx_module_t ngx_stream_upstream_zone_module = { | |
49 NGX_MODULE_V1, | |
50 &ngx_stream_upstream_zone_module_ctx, /* module context */ | |
51 ngx_stream_upstream_zone_commands, /* module directives */ | |
52 NGX_STREAM_MODULE, /* module type */ | |
53 NULL, /* init master */ | |
54 NULL, /* init module */ | |
55 NULL, /* init process */ | |
56 NULL, /* init thread */ | |
57 NULL, /* exit thread */ | |
58 NULL, /* exit process */ | |
59 NULL, /* exit master */ | |
60 NGX_MODULE_V1_PADDING | |
61 }; | |
62 | |
63 | |
64 static char * | |
65 ngx_stream_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
66 { | |
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67 ssize_t size; |
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68 ngx_str_t *value; |
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69 ngx_stream_upstream_srv_conf_t *uscf; |
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70 ngx_stream_upstream_main_conf_t *umcf; |
6115 | 71 |
72 uscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_upstream_module); | |
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73 umcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_upstream_module); |
6115 | 74 |
75 value = cf->args->elts; | |
76 | |
77 if (!value[1].len) { | |
78 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
79 "invalid zone name \"%V\"", &value[1]); | |
80 return NGX_CONF_ERROR; | |
81 } | |
82 | |
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83 if (cf->args->nelts == 3) { |
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84 size = ngx_parse_size(&value[2]); |
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85 |
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86 if (size == NGX_ERROR) { |
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87 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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88 "invalid zone size \"%V\"", &value[2]); |
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89 return NGX_CONF_ERROR; |
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90 } |
6115 | 91 |
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92 if (size < (ssize_t) (8 * ngx_pagesize)) { |
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93 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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94 "zone \"%V\" is too small", &value[1]); |
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95 return NGX_CONF_ERROR; |
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96 } |
6115 | 97 |
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98 } else { |
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99 size = 0; |
6115 | 100 } |
101 | |
102 uscf->shm_zone = ngx_shared_memory_add(cf, &value[1], size, | |
103 &ngx_stream_upstream_module); | |
104 if (uscf->shm_zone == NULL) { | |
105 return NGX_CONF_ERROR; | |
106 } | |
107 | |
108 uscf->shm_zone->init = ngx_stream_upstream_init_zone; | |
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109 uscf->shm_zone->data = umcf; |
6115 | 110 |
111 uscf->shm_zone->noreuse = 1; | |
112 | |
113 return NGX_CONF_OK; | |
114 } | |
115 | |
116 | |
117 static ngx_int_t | |
118 ngx_stream_upstream_init_zone(ngx_shm_zone_t *shm_zone, void *data) | |
119 { | |
120 size_t len; | |
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121 ngx_uint_t i; |
6115 | 122 ngx_slab_pool_t *shpool; |
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123 ngx_stream_upstream_rr_peers_t *peers, **peersp; |
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124 ngx_stream_upstream_srv_conf_t *uscf, **uscfp; |
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125 ngx_stream_upstream_main_conf_t *umcf; |
6115 | 126 |
127 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; | |
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128 umcf = shm_zone->data; |
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129 uscfp = umcf->upstreams.elts; |
6115 | 130 |
131 if (shm_zone->shm.exists) { | |
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132 peers = shpool->data; |
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133 |
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134 for (i = 0; i < umcf->upstreams.nelts; i++) { |
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135 uscf = uscfp[i]; |
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136 |
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137 if (uscf->shm_zone != shm_zone) { |
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138 continue; |
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139 } |
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140 |
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141 uscf->peer.data = peers; |
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142 peers = peers->zone_next; |
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143 } |
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144 |
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145 return NGX_OK; |
6115 | 146 } |
147 | |
148 len = sizeof(" in upstream zone \"\"") + shm_zone->shm.name.len; | |
149 | |
150 shpool->log_ctx = ngx_slab_alloc(shpool, len); | |
151 if (shpool->log_ctx == NULL) { | |
152 return NGX_ERROR; | |
153 } | |
154 | |
155 ngx_sprintf(shpool->log_ctx, " in upstream zone \"%V\"%Z", | |
156 &shm_zone->shm.name); | |
157 | |
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158 |
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159 /* copy peers to shared memory */ |
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160 |
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161 peersp = (ngx_stream_upstream_rr_peers_t **) (void *) &shpool->data; |
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162 |
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163 for (i = 0; i < umcf->upstreams.nelts; i++) { |
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164 uscf = uscfp[i]; |
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165 |
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166 if (uscf->shm_zone != shm_zone) { |
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167 continue; |
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168 } |
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169 |
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170 peers = ngx_stream_upstream_zone_copy_peers(shpool, uscf); |
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171 if (peers == NULL) { |
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172 return NGX_ERROR; |
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173 } |
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174 |
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175 *peersp = peers; |
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176 peersp = &peers->zone_next; |
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177 } |
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178 |
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179 return NGX_OK; |
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180 } |
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181 |
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182 |
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183 static ngx_stream_upstream_rr_peers_t * |
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184 ngx_stream_upstream_zone_copy_peers(ngx_slab_pool_t *shpool, |
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185 ngx_stream_upstream_srv_conf_t *uscf) |
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186 { |
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187 ngx_str_t *name; |
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188 ngx_stream_upstream_rr_peer_t *peer, **peerp; |
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189 ngx_stream_upstream_rr_peers_t *peers, *backup; |
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190 |
6115 | 191 peers = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t)); |
192 if (peers == NULL) { | |
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193 return NULL; |
6115 | 194 } |
195 | |
196 ngx_memcpy(peers, uscf->peer.data, sizeof(ngx_stream_upstream_rr_peers_t)); | |
197 | |
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198 name = ngx_slab_alloc(shpool, sizeof(ngx_str_t)); |
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199 if (name == NULL) { |
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200 return NULL; |
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201 } |
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202 |
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203 name->data = ngx_slab_alloc(shpool, peers->name->len); |
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204 if (name->data == NULL) { |
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205 return NULL; |
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206 } |
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207 |
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208 ngx_memcpy(name->data, peers->name->data, peers->name->len); |
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209 name->len = peers->name->len; |
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210 |
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211 peers->name = name; |
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212 |
6115 | 213 peers->shpool = shpool; |
214 | |
215 for (peerp = &peers->peer; *peerp; peerp = &peer->next) { | |
216 /* pool is unlocked */ | |
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217 peer = ngx_stream_upstream_zone_copy_peer(peers, *peerp); |
6115 | 218 if (peer == NULL) { |
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219 return NULL; |
6115 | 220 } |
221 | |
222 *peerp = peer; | |
223 } | |
224 | |
225 if (peers->next == NULL) { | |
226 goto done; | |
227 } | |
228 | |
229 backup = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
230 if (backup == NULL) { | |
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231 return NULL; |
6115 | 232 } |
233 | |
234 ngx_memcpy(backup, peers->next, sizeof(ngx_stream_upstream_rr_peers_t)); | |
235 | |
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236 backup->name = name; |
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237 |
6115 | 238 backup->shpool = shpool; |
239 | |
240 for (peerp = &backup->peer; *peerp; peerp = &peer->next) { | |
241 /* pool is unlocked */ | |
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242 peer = ngx_stream_upstream_zone_copy_peer(backup, *peerp); |
6115 | 243 if (peer == NULL) { |
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244 return NULL; |
6115 | 245 } |
246 | |
247 *peerp = peer; | |
248 } | |
249 | |
250 peers->next = backup; | |
251 | |
252 done: | |
253 | |
254 uscf->peer.data = peers; | |
255 | |
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256 return peers; |
6115 | 257 } |
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258 |
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259 |
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260 static ngx_stream_upstream_rr_peer_t * |
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261 ngx_stream_upstream_zone_copy_peer(ngx_stream_upstream_rr_peers_t *peers, |
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262 ngx_stream_upstream_rr_peer_t *src) |
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263 { |
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264 ngx_slab_pool_t *pool; |
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265 ngx_stream_upstream_rr_peer_t *dst; |
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266 |
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267 pool = peers->shpool; |
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268 |
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269 dst = ngx_slab_calloc_locked(pool, sizeof(ngx_stream_upstream_rr_peer_t)); |
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270 if (dst == NULL) { |
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271 return NULL; |
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272 } |
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273 |
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274 if (src) { |
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275 ngx_memcpy(dst, src, sizeof(ngx_stream_upstream_rr_peer_t)); |
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276 dst->sockaddr = NULL; |
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277 dst->name.data = NULL; |
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278 dst->server.data = NULL; |
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279 } |
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280 |
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281 dst->sockaddr = ngx_slab_calloc_locked(pool, NGX_SOCKADDRLEN); |
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282 if (dst->sockaddr == NULL) { |
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283 goto failed; |
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284 } |
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285 |
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286 dst->name.data = ngx_slab_calloc_locked(pool, NGX_SOCKADDR_STRLEN); |
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287 if (dst->name.data == NULL) { |
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288 goto failed; |
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289 } |
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290 |
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291 if (src) { |
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292 ngx_memcpy(dst->sockaddr, src->sockaddr, src->socklen); |
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293 ngx_memcpy(dst->name.data, src->name.data, src->name.len); |
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294 |
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295 dst->server.data = ngx_slab_alloc_locked(pool, src->server.len); |
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296 if (dst->server.data == NULL) { |
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297 goto failed; |
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298 } |
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299 |
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300 ngx_memcpy(dst->server.data, src->server.data, src->server.len); |
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301 } |
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302 |
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303 return dst; |
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304 |
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305 failed: |
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306 |
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307 if (dst->server.data) { |
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308 ngx_slab_free_locked(pool, dst->server.data); |
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309 } |
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310 |
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311 if (dst->name.data) { |
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312 ngx_slab_free_locked(pool, dst->name.data); |
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313 } |
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314 |
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315 if (dst->sockaddr) { |
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316 ngx_slab_free_locked(pool, dst->sockaddr); |
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317 } |
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318 |
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319 ngx_slab_free_locked(pool, dst); |
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320 |
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|
321 return NULL; |
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|
322 } |