Mercurial > hg > nginx
annotate src/http/ngx_http_upstream_round_robin.c @ 4450:4919fb357a5d stable-1.0
Merge of r4406, r4413: copyrights updated.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Sun, 05 Feb 2012 20:02:59 +0000 |
parents | e917fc5eceb7 |
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rev | line source |
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884 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
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4 * Copyright (C) Nginx, Inc. |
884 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
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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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15 static ngx_uint_t |
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16 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers); |
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17 |
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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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27 |
884 | 28 ngx_int_t |
29 ngx_http_upstream_init_round_robin(ngx_conf_t *cf, | |
30 ngx_http_upstream_srv_conf_t *us) | |
31 { | |
32 ngx_url_t u; | |
33 ngx_uint_t i, j, n; | |
34 ngx_http_upstream_server_t *server; | |
1378 | 35 ngx_http_upstream_rr_peers_t *peers, *backup; |
884 | 36 |
37 us->peer.init = ngx_http_upstream_init_round_robin_peer; | |
38 | |
39 if (us->servers) { | |
40 server = us->servers->elts; | |
41 | |
1378 | 42 n = 0; |
43 | |
884 | 44 for (i = 0; i < us->servers->nelts; i++) { |
1378 | 45 if (server[i].backup) { |
46 continue; | |
47 } | |
48 | |
884 | 49 n += server[i].naddrs; |
50 } | |
51 | |
52 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
53 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
54 if (peers == NULL) { | |
55 return NGX_ERROR; | |
56 } | |
57 | |
1378 | 58 peers->single = (n == 1); |
884 | 59 peers->number = n; |
60 peers->name = &us->host; | |
61 | |
62 n = 0; | |
63 | |
64 for (i = 0; i < us->servers->nelts; i++) { | |
65 for (j = 0; j < server[i].naddrs; j++) { | |
1378 | 66 if (server[i].backup) { |
67 continue; | |
68 } | |
69 | |
884 | 70 peers->peer[n].sockaddr = server[i].addrs[j].sockaddr; |
71 peers->peer[n].socklen = server[i].addrs[j].socklen; | |
72 peers->peer[n].name = server[i].addrs[j].name; | |
73 peers->peer[n].max_fails = server[i].max_fails; | |
74 peers->peer[n].fail_timeout = server[i].fail_timeout; | |
75 peers->peer[n].down = server[i].down; | |
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76 peers->peer[n].weight = server[i].down ? 0 : server[i].weight; |
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77 peers->peer[n].current_weight = peers->peer[n].weight; |
884 | 78 n++; |
79 } | |
80 } | |
81 | |
82 us->peer.data = peers; | |
83 | |
1379 | 84 ngx_sort(&peers->peer[0], (size_t) n, |
85 sizeof(ngx_http_upstream_rr_peer_t), | |
86 ngx_http_upstream_cmp_servers); | |
87 | |
1378 | 88 /* backup servers */ |
89 | |
90 n = 0; | |
91 | |
92 for (i = 0; i < us->servers->nelts; i++) { | |
93 if (!server[i].backup) { | |
94 continue; | |
95 } | |
96 | |
97 n += server[i].naddrs; | |
98 } | |
99 | |
100 if (n == 0) { | |
101 return NGX_OK; | |
102 } | |
103 | |
104 backup = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
105 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
106 if (backup == NULL) { | |
107 return NGX_ERROR; | |
108 } | |
109 | |
110 peers->single = 0; | |
111 backup->single = 0; | |
112 backup->number = n; | |
113 backup->name = &us->host; | |
114 | |
115 n = 0; | |
116 | |
117 for (i = 0; i < us->servers->nelts; i++) { | |
118 for (j = 0; j < server[i].naddrs; j++) { | |
119 if (!server[i].backup) { | |
120 continue; | |
121 } | |
122 | |
123 backup->peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
124 backup->peer[n].socklen = server[i].addrs[j].socklen; | |
125 backup->peer[n].name = server[i].addrs[j].name; | |
126 backup->peer[n].weight = server[i].weight; | |
127 backup->peer[n].current_weight = server[i].weight; | |
128 backup->peer[n].max_fails = server[i].max_fails; | |
129 backup->peer[n].fail_timeout = server[i].fail_timeout; | |
130 backup->peer[n].down = server[i].down; | |
131 n++; | |
132 } | |
133 } | |
134 | |
135 peers->next = backup; | |
136 | |
1379 | 137 ngx_sort(&backup->peer[0], (size_t) n, |
138 sizeof(ngx_http_upstream_rr_peer_t), | |
139 ngx_http_upstream_cmp_servers); | |
140 | |
884 | 141 return NGX_OK; |
142 } | |
143 | |
144 | |
145 /* an upstream implicitly defined by proxy_pass, etc. */ | |
146 | |
906 | 147 if (us->port == 0 && us->default_port == 0) { |
148 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
149 "no port in upstream \"%V\" in %s:%ui", | |
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150 &us->host, us->file_name, us->line); |
906 | 151 return NGX_ERROR; |
152 } | |
153 | |
884 | 154 ngx_memzero(&u, sizeof(ngx_url_t)); |
155 | |
156 u.host = us->host; | |
916 | 157 u.port = (in_port_t) (us->port ? us->port : us->default_port); |
884 | 158 |
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159 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { |
884 | 160 if (u.err) { |
161 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
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162 "%s in upstream \"%V\" in %s:%ui", |
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163 u.err, &us->host, us->file_name, us->line); |
884 | 164 } |
165 | |
166 return NGX_ERROR; | |
167 } | |
168 | |
169 n = u.naddrs; | |
170 | |
171 peers = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
172 + sizeof(ngx_http_upstream_rr_peer_t) * (n - 1)); | |
173 if (peers == NULL) { | |
174 return NGX_ERROR; | |
175 } | |
176 | |
1378 | 177 peers->single = (n == 1); |
884 | 178 peers->number = n; |
179 peers->name = &us->host; | |
180 | |
181 for (i = 0; i < u.naddrs; i++) { | |
1564 | 182 peers->peer[i].sockaddr = u.addrs[i].sockaddr; |
183 peers->peer[i].socklen = u.addrs[i].socklen; | |
184 peers->peer[i].name = u.addrs[i].name; | |
185 peers->peer[i].weight = 1; | |
186 peers->peer[i].current_weight = 1; | |
187 peers->peer[i].max_fails = 1; | |
188 peers->peer[i].fail_timeout = 10; | |
884 | 189 } |
190 | |
191 us->peer.data = peers; | |
192 | |
1378 | 193 /* implicitly defined upstream has no backup servers */ |
194 | |
884 | 195 return NGX_OK; |
196 } | |
197 | |
198 | |
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199 static ngx_int_t |
1379 | 200 ngx_http_upstream_cmp_servers(const void *one, const void *two) |
201 { | |
202 ngx_http_upstream_rr_peer_t *first, *second; | |
203 | |
204 first = (ngx_http_upstream_rr_peer_t *) one; | |
205 second = (ngx_http_upstream_rr_peer_t *) two; | |
206 | |
207 return (first->weight < second->weight); | |
208 } | |
209 | |
210 | |
884 | 211 ngx_int_t |
212 ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r, | |
213 ngx_http_upstream_srv_conf_t *us) | |
214 { | |
215 ngx_uint_t n; | |
216 ngx_http_upstream_rr_peer_data_t *rrp; | |
217 | |
218 rrp = r->upstream->peer.data; | |
219 | |
220 if (rrp == NULL) { | |
221 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
222 if (rrp == NULL) { | |
223 return NGX_ERROR; | |
224 } | |
225 | |
226 r->upstream->peer.data = rrp; | |
227 } | |
228 | |
229 rrp->peers = us->peer.data; | |
230 rrp->current = 0; | |
231 | |
4167 | 232 n = rrp->peers->number; |
233 | |
234 if (rrp->peers->next && rrp->peers->next->number > n) { | |
235 n = rrp->peers->next->number; | |
236 } | |
237 | |
238 if (n <= 8 * sizeof(uintptr_t)) { | |
884 | 239 rrp->tried = &rrp->data; |
240 rrp->data = 0; | |
241 | |
242 } else { | |
4167 | 243 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t)); |
884 | 244 |
245 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
246 if (rrp->tried == NULL) { | |
247 return NGX_ERROR; | |
248 } | |
249 } | |
250 | |
251 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
252 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
253 r->upstream->peer.tries = rrp->peers->number; | |
254 #if (NGX_HTTP_SSL) | |
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255 r->upstream->peer.set_session = |
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256 ngx_http_upstream_set_round_robin_peer_session; |
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257 r->upstream->peer.save_session = |
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258 ngx_http_upstream_save_round_robin_peer_session; |
884 | 259 #endif |
260 | |
261 return NGX_OK; | |
262 } | |
263 | |
264 | |
265 ngx_int_t | |
1658 | 266 ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r, |
267 ngx_http_upstream_resolved_t *ur) | |
268 { | |
269 u_char *p; | |
270 size_t len; | |
271 ngx_uint_t i, n; | |
272 struct sockaddr_in *sin; | |
273 ngx_http_upstream_rr_peers_t *peers; | |
274 ngx_http_upstream_rr_peer_data_t *rrp; | |
275 | |
276 rrp = r->upstream->peer.data; | |
277 | |
278 if (rrp == NULL) { | |
279 rrp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_rr_peer_data_t)); | |
280 if (rrp == NULL) { | |
281 return NGX_ERROR; | |
282 } | |
283 | |
284 r->upstream->peer.data = rrp; | |
285 } | |
286 | |
287 peers = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_rr_peers_t) | |
288 + sizeof(ngx_http_upstream_rr_peer_t) * (ur->naddrs - 1)); | |
289 if (peers == NULL) { | |
290 return NGX_ERROR; | |
291 } | |
292 | |
293 peers->single = (ur->naddrs == 1); | |
294 peers->number = ur->naddrs; | |
295 peers->name = &ur->host; | |
296 | |
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297 if (ur->sockaddr) { |
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298 peers->peer[0].sockaddr = ur->sockaddr; |
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299 peers->peer[0].socklen = ur->socklen; |
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300 peers->peer[0].name = ur->host; |
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301 peers->peer[0].weight = 1; |
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302 peers->peer[0].current_weight = 1; |
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303 peers->peer[0].max_fails = 1; |
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304 peers->peer[0].fail_timeout = 10; |
1658 | 305 |
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306 } else { |
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307 |
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308 for (i = 0; i < ur->naddrs; i++) { |
1658 | 309 |
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310 len = NGX_INET_ADDRSTRLEN + sizeof(":65536") - 1; |
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311 |
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312 p = ngx_pnalloc(r->pool, len); |
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313 if (p == NULL) { |
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314 return NGX_ERROR; |
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315 } |
1658 | 316 |
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317 len = ngx_inet_ntop(AF_INET, &ur->addrs[i], p, NGX_INET_ADDRSTRLEN); |
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318 len = ngx_sprintf(&p[len], ":%d", ur->port) - p; |
1658 | 319 |
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320 sin = ngx_pcalloc(r->pool, sizeof(struct sockaddr_in)); |
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321 if (sin == NULL) { |
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322 return NGX_ERROR; |
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323 } |
1658 | 324 |
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325 sin->sin_family = AF_INET; |
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326 sin->sin_port = htons(ur->port); |
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327 sin->sin_addr.s_addr = ur->addrs[i]; |
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328 |
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329 peers->peer[i].sockaddr = (struct sockaddr *) sin; |
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330 peers->peer[i].socklen = sizeof(struct sockaddr_in); |
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331 peers->peer[i].name.len = len; |
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332 peers->peer[i].name.data = p; |
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333 peers->peer[i].weight = 1; |
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334 peers->peer[i].current_weight = 1; |
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335 peers->peer[i].max_fails = 1; |
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336 peers->peer[i].fail_timeout = 10; |
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337 } |
1658 | 338 } |
339 | |
340 rrp->peers = peers; | |
341 rrp->current = 0; | |
342 | |
343 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { | |
344 rrp->tried = &rrp->data; | |
345 rrp->data = 0; | |
346 | |
347 } else { | |
348 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
349 / (8 * sizeof(uintptr_t)); | |
350 | |
351 rrp->tried = ngx_pcalloc(r->pool, n * sizeof(uintptr_t)); | |
352 if (rrp->tried == NULL) { | |
353 return NGX_ERROR; | |
354 } | |
355 } | |
356 | |
357 r->upstream->peer.get = ngx_http_upstream_get_round_robin_peer; | |
358 r->upstream->peer.free = ngx_http_upstream_free_round_robin_peer; | |
359 r->upstream->peer.tries = rrp->peers->number; | |
360 #if (NGX_HTTP_SSL) | |
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361 r->upstream->peer.set_session = ngx_http_upstream_empty_set_session; |
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362 r->upstream->peer.save_session = ngx_http_upstream_empty_save_session; |
1658 | 363 #endif |
364 | |
365 return NGX_OK; | |
366 } | |
367 | |
368 | |
369 ngx_int_t | |
884 | 370 ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data) |
371 { | |
372 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
373 | |
1378 | 374 time_t now; |
375 uintptr_t m; | |
376 ngx_int_t rc; | |
377 ngx_uint_t i, n; | |
378 ngx_connection_t *c; | |
379 ngx_http_upstream_rr_peer_t *peer; | |
380 ngx_http_upstream_rr_peers_t *peers; | |
884 | 381 |
382 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
383 "get rr peer, try: %ui", pc->tries); | |
384 | |
385 now = ngx_time(); | |
386 | |
387 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
388 | |
389 if (rrp->peers->last_cached) { | |
390 | |
391 /* cached connection */ | |
392 | |
393 c = rrp->peers->cached[rrp->peers->last_cached]; | |
394 rrp->peers->last_cached--; | |
395 | |
396 /* ngx_unlock_mutex(ppr->peers->mutex); */ | |
397 | |
398 #if (NGX_THREADS) | |
399 c->read->lock = c->read->own_lock; | |
400 c->write->lock = c->write->own_lock; | |
401 #endif | |
402 | |
403 pc->connection = c; | |
404 pc->cached = 1; | |
405 | |
406 return NGX_OK; | |
407 } | |
408 | |
409 pc->cached = 0; | |
410 pc->connection = NULL; | |
411 | |
1378 | 412 if (rrp->peers->single) { |
884 | 413 peer = &rrp->peers->peer[0]; |
414 | |
415 } else { | |
416 | |
417 /* there are several peers */ | |
418 | |
419 if (pc->tries == rrp->peers->number) { | |
420 | |
421 /* it's a first try - get a current peer */ | |
422 | |
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423 i = pc->tries; |
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424 |
884 | 425 for ( ;; ) { |
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426 rrp->current = ngx_http_upstream_get_peer(rrp->peers); |
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427 |
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428 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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429 "get rr peer, current: %ui %i", |
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430 rrp->current, |
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431 rrp->peers->peer[rrp->current].current_weight); |
884 | 432 |
433 n = rrp->current / (8 * sizeof(uintptr_t)); | |
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434 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t)); |
884 | 435 |
436 if (!(rrp->tried[n] & m)) { | |
437 peer = &rrp->peers->peer[rrp->current]; | |
438 | |
439 if (!peer->down) { | |
440 | |
441 if (peer->max_fails == 0 | |
442 || peer->fails < peer->max_fails) | |
443 { | |
444 break; | |
445 } | |
446 | |
447 if (now - peer->accessed > peer->fail_timeout) { | |
448 peer->fails = 0; | |
449 break; | |
450 } | |
451 | |
1344
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452 peer->current_weight = 0; |
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453 |
884 | 454 } else { |
455 rrp->tried[n] |= m; | |
456 } | |
457 | |
458 pc->tries--; | |
459 } | |
460 | |
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461 if (pc->tries == 0) { |
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462 goto failed; |
884 | 463 } |
464 | |
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465 if (--i == 0) { |
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466 ngx_log_error(NGX_LOG_ALERT, pc->log, 0, |
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467 "round robin upstream stuck on %ui tries", |
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468 pc->tries); |
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469 goto failed; |
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470 } |
884 | 471 } |
472 | |
473 peer->current_weight--; | |
474 | |
475 } else { | |
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476 |
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477 i = pc->tries; |
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478 |
884 | 479 for ( ;; ) { |
480 n = rrp->current / (8 * sizeof(uintptr_t)); | |
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481 m = (uintptr_t) 1 << rrp->current % (8 * sizeof(uintptr_t)); |
884 | 482 |
483 if (!(rrp->tried[n] & m)) { | |
484 | |
485 peer = &rrp->peers->peer[rrp->current]; | |
486 | |
487 if (!peer->down) { | |
488 | |
489 if (peer->max_fails == 0 | |
490 || peer->fails < peer->max_fails) | |
491 { | |
492 break; | |
493 } | |
494 | |
495 if (now - peer->accessed > peer->fail_timeout) { | |
496 peer->fails = 0; | |
497 break; | |
498 } | |
499 | |
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500 peer->current_weight = 0; |
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501 |
884 | 502 } else { |
503 rrp->tried[n] |= m; | |
504 } | |
505 | |
506 pc->tries--; | |
507 } | |
508 | |
509 rrp->current++; | |
510 | |
511 if (rrp->current >= rrp->peers->number) { | |
512 rrp->current = 0; | |
513 } | |
514 | |
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515 if (pc->tries == 0) { |
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516 goto failed; |
884 | 517 } |
518 | |
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519 if (--i == 0) { |
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520 ngx_log_error(NGX_LOG_ALERT, pc->log, 0, |
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521 "round robin upstream stuck on %ui tries", |
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522 pc->tries); |
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523 goto failed; |
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524 } |
884 | 525 } |
526 | |
527 peer->current_weight--; | |
528 } | |
529 | |
530 rrp->tried[n] |= m; | |
531 } | |
532 | |
533 pc->sockaddr = peer->sockaddr; | |
534 pc->socklen = peer->socklen; | |
535 pc->name = &peer->name; | |
536 | |
537 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
538 | |
1378 | 539 if (pc->tries == 1 && rrp->peers->next) { |
540 pc->tries += rrp->peers->next->number; | |
541 | |
542 n = rrp->peers->next->number / (8 * sizeof(uintptr_t)) + 1; | |
1389 | 543 for (i = 0; i < n; i++) { |
1378 | 544 rrp->tried[i] = 0; |
545 } | |
546 } | |
547 | |
884 | 548 return NGX_OK; |
549 | |
550 failed: | |
551 | |
1378 | 552 peers = rrp->peers; |
553 | |
554 if (peers->next) { | |
555 | |
556 /* ngx_unlock_mutex(peers->mutex); */ | |
557 | |
558 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, "backup servers"); | |
559 | |
560 rrp->peers = peers->next; | |
561 pc->tries = rrp->peers->number; | |
562 | |
563 n = rrp->peers->number / (8 * sizeof(uintptr_t)) + 1; | |
1389 | 564 for (i = 0; i < n; i++) { |
1378 | 565 rrp->tried[i] = 0; |
566 } | |
567 | |
568 rc = ngx_http_upstream_get_round_robin_peer(pc, rrp); | |
569 | |
570 if (rc != NGX_BUSY) { | |
571 return rc; | |
572 } | |
573 | |
574 /* ngx_lock_mutex(peers->mutex); */ | |
575 } | |
576 | |
884 | 577 /* all peers failed, mark them as live for quick recovery */ |
578 | |
1378 | 579 for (i = 0; i < peers->number; i++) { |
580 peers->peer[i].fails = 0; | |
884 | 581 } |
582 | |
1378 | 583 /* ngx_unlock_mutex(peers->mutex); */ |
884 | 584 |
1378 | 585 pc->name = peers->name; |
884 | 586 |
587 return NGX_BUSY; | |
588 } | |
589 | |
590 | |
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591 static ngx_uint_t |
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592 ngx_http_upstream_get_peer(ngx_http_upstream_rr_peers_t *peers) |
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593 { |
4167 | 594 ngx_uint_t i, n, reset = 0; |
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595 ngx_http_upstream_rr_peer_t *peer; |
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596 |
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597 peer = &peers->peer[0]; |
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598 |
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599 for ( ;; ) { |
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600 |
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601 for (i = 0; i < peers->number; i++) { |
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602 |
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603 if (peer[i].current_weight <= 0) { |
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604 continue; |
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605 } |
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606 |
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607 n = i; |
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608 |
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609 while (i < peers->number - 1) { |
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610 |
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611 i++; |
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612 |
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613 if (peer[i].current_weight <= 0) { |
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614 continue; |
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615 } |
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616 |
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617 if (peer[n].current_weight * 1000 / peer[i].current_weight |
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618 > peer[n].weight * 1000 / peer[i].weight) |
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619 { |
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620 return n; |
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621 } |
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622 |
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623 n = i; |
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624 } |
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625 |
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626 if (peer[i].current_weight > 0) { |
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627 n = i; |
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628 } |
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629 |
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630 return n; |
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631 } |
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632 |
4167 | 633 if (reset++) { |
634 return 0; | |
635 } | |
636 | |
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637 for (i = 0; i < peers->number; i++) { |
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638 peer[i].current_weight = peer[i].weight; |
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639 } |
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640 } |
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641 } |
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642 |
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643 |
884 | 644 void |
645 ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
646 ngx_uint_t state) | |
647 { | |
648 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
649 | |
650 time_t now; | |
651 ngx_http_upstream_rr_peer_t *peer; | |
652 | |
653 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
654 "free rr peer %ui %ui", pc->tries, state); | |
655 | |
656 if (state == 0 && pc->tries == 0) { | |
657 return; | |
658 } | |
659 | |
660 /* TODO: NGX_PEER_KEEPALIVE */ | |
661 | |
1378 | 662 if (rrp->peers->single) { |
884 | 663 pc->tries = 0; |
664 return; | |
665 } | |
666 | |
667 if (state & NGX_PEER_FAILED) { | |
668 now = ngx_time(); | |
669 | |
670 peer = &rrp->peers->peer[rrp->current]; | |
671 | |
672 /* ngx_lock_mutex(rrp->peers->mutex); */ | |
673 | |
674 peer->fails++; | |
675 peer->accessed = now; | |
676 | |
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677 if (peer->max_fails) { |
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678 peer->current_weight -= peer->weight / peer->max_fails; |
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679 } |
1344
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680 |
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681 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
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682 "free rr peer failed: %ui %i", |
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683 rrp->current, peer->current_weight); |
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684 |
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685 if (peer->current_weight < 0) { |
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686 peer->current_weight = 0; |
884 | 687 } |
688 | |
689 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
690 } | |
691 | |
692 rrp->current++; | |
693 | |
694 if (rrp->current >= rrp->peers->number) { | |
695 rrp->current = 0; | |
696 } | |
697 | |
698 if (pc->tries) { | |
699 pc->tries--; | |
700 } | |
701 | |
702 /* ngx_unlock_mutex(rrp->peers->mutex); */ | |
703 } | |
704 | |
705 | |
706 #if (NGX_HTTP_SSL) | |
707 | |
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708 ngx_int_t |
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709 ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, |
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710 void *data) |
884 | 711 { |
712 ngx_http_upstream_rr_peer_data_t *rrp = data; | |
713 | |
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714 ngx_int_t rc; |
884 | 715 ngx_ssl_session_t *ssl_session; |
716 ngx_http_upstream_rr_peer_t *peer; | |
717 | |
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718 peer = &rrp->peers->peer[rrp->current]; |
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719 |
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720 /* TODO: threads only mutex */ |
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721 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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722 |
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723 ssl_session = peer->ssl_session; |
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724 |
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725 rc = ngx_ssl_set_session(pc->connection, ssl_session); |
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726 |
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727 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 728 "set session: %p:%d", |
729 ssl_session, ssl_session ? ssl_session->references : 0); | |
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730 |
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731 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
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732 |
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733 return rc; |
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734 } |
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735 |
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736 |
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737 void |
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738 ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, |
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739 void *data) |
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740 { |
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741 ngx_http_upstream_rr_peer_data_t *rrp = data; |
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742 |
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743 ngx_ssl_session_t *old_ssl_session, *ssl_session; |
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744 ngx_http_upstream_rr_peer_t *peer; |
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745 |
884 | 746 ssl_session = ngx_ssl_get_session(pc->connection); |
747 | |
748 if (ssl_session == NULL) { | |
749 return; | |
750 } | |
751 | |
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752 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 753 "save session: %p:%d", ssl_session, ssl_session->references); |
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754 |
884 | 755 peer = &rrp->peers->peer[rrp->current]; |
756 | |
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757 /* TODO: threads only mutex */ |
884 | 758 /* ngx_lock_mutex(rrp->peers->mutex); */ |
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759 |
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760 old_ssl_session = peer->ssl_session; |
884 | 761 peer->ssl_session = ssl_session; |
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762 |
884 | 763 /* ngx_unlock_mutex(rrp->peers->mutex); */ |
764 | |
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765 if (old_ssl_session) { |
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766 |
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767 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, |
1443 | 768 "old session: %p:%d", |
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769 old_ssl_session, old_ssl_session->references); |
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770 |
884 | 771 /* TODO: may block */ |
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772 |
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773 ngx_ssl_free_session(old_ssl_session); |
884 | 774 } |
775 } | |
776 | |
4041
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777 |
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778 static ngx_int_t |
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779 ngx_http_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data) |
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780 { |
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781 return NGX_OK; |
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782 } |
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783 |
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784 |
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785 static void |
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786 ngx_http_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data) |
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787 { |
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788 return; |
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789 } |
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790 |
884 | 791 #endif |