Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_upstream_keepalive_module.c @ 5118:af155fc41deb
Image filter: the "image_filter_interlace" directive.
Patch by Ian Babrou, with minor changes.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Tue, 19 Mar 2013 08:13:48 +0000 |
parents | 82336a9ce26d |
children | 089a662c17d1 |
rev | line source |
---|---|
4127 | 1 |
2 /* | |
3 * Copyright (C) Maxim Dounin | |
4412 | 4 * Copyright (C) Nginx, Inc. |
4127 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
13 typedef struct { | |
14 ngx_uint_t max_cached; | |
15 | |
16 ngx_queue_t cache; | |
17 ngx_queue_t free; | |
18 | |
19 ngx_http_upstream_init_pt original_init_upstream; | |
20 ngx_http_upstream_init_peer_pt original_init_peer; | |
21 | |
22 } ngx_http_upstream_keepalive_srv_conf_t; | |
23 | |
24 | |
25 typedef struct { | |
26 ngx_http_upstream_keepalive_srv_conf_t *conf; | |
27 | |
28 ngx_http_upstream_t *upstream; | |
29 | |
30 void *data; | |
31 | |
32 ngx_event_get_peer_pt original_get_peer; | |
33 ngx_event_free_peer_pt original_free_peer; | |
34 | |
35 #if (NGX_HTTP_SSL) | |
36 ngx_event_set_peer_session_pt original_set_session; | |
37 ngx_event_save_peer_session_pt original_save_session; | |
38 #endif | |
39 | |
40 ngx_uint_t failed; /* unsigned:1 */ | |
41 | |
42 } ngx_http_upstream_keepalive_peer_data_t; | |
43 | |
44 | |
45 typedef struct { | |
46 ngx_http_upstream_keepalive_srv_conf_t *conf; | |
47 | |
48 ngx_queue_t queue; | |
49 ngx_connection_t *connection; | |
50 | |
51 socklen_t socklen; | |
52 u_char sockaddr[NGX_SOCKADDRLEN]; | |
53 | |
54 } ngx_http_upstream_keepalive_cache_t; | |
55 | |
56 | |
57 static ngx_int_t ngx_http_upstream_init_keepalive_peer(ngx_http_request_t *r, | |
58 ngx_http_upstream_srv_conf_t *us); | |
59 static ngx_int_t ngx_http_upstream_get_keepalive_peer(ngx_peer_connection_t *pc, | |
60 void *data); | |
61 static void ngx_http_upstream_free_keepalive_peer(ngx_peer_connection_t *pc, | |
62 void *data, ngx_uint_t state); | |
63 | |
64 static void ngx_http_upstream_keepalive_dummy_handler(ngx_event_t *ev); | |
65 static void ngx_http_upstream_keepalive_close_handler(ngx_event_t *ev); | |
66 static void ngx_http_upstream_keepalive_close(ngx_connection_t *c); | |
67 | |
68 | |
69 #if (NGX_HTTP_SSL) | |
70 static ngx_int_t ngx_http_upstream_keepalive_set_session( | |
71 ngx_peer_connection_t *pc, void *data); | |
72 static void ngx_http_upstream_keepalive_save_session(ngx_peer_connection_t *pc, | |
73 void *data); | |
74 #endif | |
75 | |
76 static void *ngx_http_upstream_keepalive_create_conf(ngx_conf_t *cf); | |
77 static char *ngx_http_upstream_keepalive(ngx_conf_t *cf, ngx_command_t *cmd, | |
78 void *conf); | |
79 | |
80 | |
81 static ngx_command_t ngx_http_upstream_keepalive_commands[] = { | |
82 | |
83 { ngx_string("keepalive"), | |
84 NGX_HTTP_UPS_CONF|NGX_CONF_TAKE12, | |
85 ngx_http_upstream_keepalive, | |
86 0, | |
87 0, | |
88 NULL }, | |
89 | |
90 ngx_null_command | |
91 }; | |
92 | |
93 | |
94 static ngx_http_module_t ngx_http_upstream_keepalive_module_ctx = { | |
95 NULL, /* preconfiguration */ | |
96 NULL, /* postconfiguration */ | |
97 | |
98 NULL, /* create main configuration */ | |
99 NULL, /* init main configuration */ | |
100 | |
101 ngx_http_upstream_keepalive_create_conf, /* create server configuration */ | |
102 NULL, /* merge server configuration */ | |
103 | |
104 NULL, /* create location configuration */ | |
105 NULL /* merge location configuration */ | |
106 }; | |
107 | |
108 | |
109 ngx_module_t ngx_http_upstream_keepalive_module = { | |
110 NGX_MODULE_V1, | |
111 &ngx_http_upstream_keepalive_module_ctx, /* module context */ | |
112 ngx_http_upstream_keepalive_commands, /* module directives */ | |
113 NGX_HTTP_MODULE, /* module type */ | |
114 NULL, /* init master */ | |
115 NULL, /* init module */ | |
116 NULL, /* init process */ | |
117 NULL, /* init thread */ | |
118 NULL, /* exit thread */ | |
119 NULL, /* exit process */ | |
120 NULL, /* exit master */ | |
121 NGX_MODULE_V1_PADDING | |
122 }; | |
123 | |
124 | |
125 static ngx_int_t | |
126 ngx_http_upstream_init_keepalive(ngx_conf_t *cf, | |
127 ngx_http_upstream_srv_conf_t *us) | |
128 { | |
129 ngx_uint_t i; | |
130 ngx_http_upstream_keepalive_srv_conf_t *kcf; | |
131 ngx_http_upstream_keepalive_cache_t *cached; | |
132 | |
133 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, cf->log, 0, | |
134 "init keepalive"); | |
135 | |
136 kcf = ngx_http_conf_upstream_srv_conf(us, | |
137 ngx_http_upstream_keepalive_module); | |
138 | |
139 if (kcf->original_init_upstream(cf, us) != NGX_OK) { | |
140 return NGX_ERROR; | |
141 } | |
142 | |
143 kcf->original_init_peer = us->peer.init; | |
144 | |
145 us->peer.init = ngx_http_upstream_init_keepalive_peer; | |
146 | |
147 /* allocate cache items and add to free queue */ | |
148 | |
149 cached = ngx_pcalloc(cf->pool, | |
150 sizeof(ngx_http_upstream_keepalive_cache_t) * kcf->max_cached); | |
151 if (cached == NULL) { | |
152 return NGX_ERROR; | |
153 } | |
154 | |
155 ngx_queue_init(&kcf->cache); | |
156 ngx_queue_init(&kcf->free); | |
157 | |
158 for (i = 0; i < kcf->max_cached; i++) { | |
159 ngx_queue_insert_head(&kcf->free, &cached[i].queue); | |
160 cached[i].conf = kcf; | |
161 } | |
162 | |
163 return NGX_OK; | |
164 } | |
165 | |
166 | |
167 static ngx_int_t | |
168 ngx_http_upstream_init_keepalive_peer(ngx_http_request_t *r, | |
169 ngx_http_upstream_srv_conf_t *us) | |
170 { | |
171 ngx_http_upstream_keepalive_peer_data_t *kp; | |
172 ngx_http_upstream_keepalive_srv_conf_t *kcf; | |
173 | |
174 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
175 "init keepalive peer"); | |
176 | |
177 kcf = ngx_http_conf_upstream_srv_conf(us, | |
178 ngx_http_upstream_keepalive_module); | |
179 | |
180 kp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_keepalive_peer_data_t)); | |
181 if (kp == NULL) { | |
182 return NGX_ERROR; | |
183 } | |
184 | |
185 if (kcf->original_init_peer(r, us) != NGX_OK) { | |
186 return NGX_ERROR; | |
187 } | |
188 | |
189 kp->conf = kcf; | |
190 kp->upstream = r->upstream; | |
191 kp->data = r->upstream->peer.data; | |
192 kp->original_get_peer = r->upstream->peer.get; | |
193 kp->original_free_peer = r->upstream->peer.free; | |
194 | |
195 r->upstream->peer.data = kp; | |
196 r->upstream->peer.get = ngx_http_upstream_get_keepalive_peer; | |
197 r->upstream->peer.free = ngx_http_upstream_free_keepalive_peer; | |
198 | |
199 #if (NGX_HTTP_SSL) | |
200 kp->original_set_session = r->upstream->peer.set_session; | |
201 kp->original_save_session = r->upstream->peer.save_session; | |
202 r->upstream->peer.set_session = ngx_http_upstream_keepalive_set_session; | |
203 r->upstream->peer.save_session = ngx_http_upstream_keepalive_save_session; | |
204 #endif | |
205 | |
206 return NGX_OK; | |
207 } | |
208 | |
209 | |
210 static ngx_int_t | |
211 ngx_http_upstream_get_keepalive_peer(ngx_peer_connection_t *pc, void *data) | |
212 { | |
213 ngx_http_upstream_keepalive_peer_data_t *kp = data; | |
214 ngx_http_upstream_keepalive_cache_t *item; | |
215 | |
216 ngx_int_t rc; | |
217 ngx_queue_t *q, *cache; | |
218 ngx_connection_t *c; | |
219 | |
220 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
221 "get keepalive peer"); | |
222 | |
223 kp->failed = 0; | |
224 | |
4694
5b5c07dee156
Upstream keepalive: "single" parameter deprecated.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
225 /* ask balancer */ |
4127 | 226 |
227 rc = kp->original_get_peer(pc, kp->data); | |
228 | |
4694
5b5c07dee156
Upstream keepalive: "single" parameter deprecated.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
229 if (rc != NGX_OK) { |
4127 | 230 return rc; |
231 } | |
232 | |
233 /* search cache for suitable connection */ | |
234 | |
235 cache = &kp->conf->cache; | |
236 | |
237 for (q = ngx_queue_head(cache); | |
238 q != ngx_queue_sentinel(cache); | |
239 q = ngx_queue_next(q)) | |
240 { | |
241 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); | |
242 c = item->connection; | |
243 | |
244 if (ngx_memn2cmp((u_char *) &item->sockaddr, (u_char *) pc->sockaddr, | |
245 item->socklen, pc->socklen) | |
246 == 0) | |
247 { | |
248 ngx_queue_remove(q); | |
249 ngx_queue_insert_head(&kp->conf->free, q); | |
250 | |
251 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
252 "get keepalive peer: using connection %p", c); | |
253 | |
254 c->idle = 0; | |
255 c->log = pc->log; | |
256 c->read->log = pc->log; | |
257 c->write->log = pc->log; | |
258 c->pool->log = pc->log; | |
259 | |
260 pc->connection = c; | |
261 pc->cached = 1; | |
262 | |
263 return NGX_DONE; | |
264 } | |
265 } | |
266 | |
267 return NGX_OK; | |
268 } | |
269 | |
270 | |
271 static void | |
272 ngx_http_upstream_free_keepalive_peer(ngx_peer_connection_t *pc, void *data, | |
273 ngx_uint_t state) | |
274 { | |
275 ngx_http_upstream_keepalive_peer_data_t *kp = data; | |
276 ngx_http_upstream_keepalive_cache_t *item; | |
277 | |
278 ngx_queue_t *q; | |
279 ngx_connection_t *c; | |
280 ngx_http_upstream_t *u; | |
281 | |
282 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
283 "free keepalive peer"); | |
284 | |
285 /* remember failed state - peer.free() may be called more than once */ | |
286 | |
287 if (state & NGX_PEER_FAILED) { | |
288 kp->failed = 1; | |
289 } | |
290 | |
291 /* cache valid connections */ | |
292 | |
293 u = kp->upstream; | |
294 c = pc->connection; | |
295 | |
296 if (kp->failed | |
297 || c == NULL | |
298 || c->read->eof | |
299 || c->read->error | |
300 || c->read->timedout | |
301 || c->write->error | |
302 || c->write->timedout) | |
303 { | |
304 goto invalid; | |
305 } | |
306 | |
307 if (!u->keepalive) { | |
308 goto invalid; | |
309 } | |
310 | |
311 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { | |
312 goto invalid; | |
313 } | |
314 | |
315 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
316 "free keepalive peer: saving connection %p", c); | |
317 | |
318 if (ngx_queue_empty(&kp->conf->free)) { | |
319 | |
320 q = ngx_queue_last(&kp->conf->cache); | |
321 ngx_queue_remove(q); | |
322 | |
323 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); | |
324 | |
325 ngx_http_upstream_keepalive_close(item->connection); | |
326 | |
327 } else { | |
328 q = ngx_queue_head(&kp->conf->free); | |
329 ngx_queue_remove(q); | |
330 | |
331 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); | |
332 } | |
333 | |
334 item->connection = c; | |
335 ngx_queue_insert_head(&kp->conf->cache, q); | |
336 | |
337 pc->connection = NULL; | |
338 | |
339 if (c->read->timer_set) { | |
340 ngx_del_timer(c->read); | |
341 } | |
342 if (c->write->timer_set) { | |
343 ngx_del_timer(c->write); | |
344 } | |
345 | |
346 c->write->handler = ngx_http_upstream_keepalive_dummy_handler; | |
347 c->read->handler = ngx_http_upstream_keepalive_close_handler; | |
348 | |
349 c->data = item; | |
350 c->idle = 1; | |
351 c->log = ngx_cycle->log; | |
352 c->read->log = ngx_cycle->log; | |
353 c->write->log = ngx_cycle->log; | |
354 c->pool->log = ngx_cycle->log; | |
355 | |
356 item->socklen = pc->socklen; | |
357 ngx_memcpy(&item->sockaddr, pc->sockaddr, pc->socklen); | |
358 | |
359 if (c->read->ready) { | |
360 ngx_http_upstream_keepalive_close_handler(c->read); | |
361 } | |
362 | |
363 invalid: | |
364 | |
365 kp->original_free_peer(pc, kp->data, state); | |
366 } | |
367 | |
368 | |
369 static void | |
370 ngx_http_upstream_keepalive_dummy_handler(ngx_event_t *ev) | |
371 { | |
372 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, | |
373 "keepalive dummy handler"); | |
374 } | |
375 | |
376 | |
377 static void | |
378 ngx_http_upstream_keepalive_close_handler(ngx_event_t *ev) | |
379 { | |
380 ngx_http_upstream_keepalive_srv_conf_t *conf; | |
381 ngx_http_upstream_keepalive_cache_t *item; | |
382 | |
383 int n; | |
384 char buf[1]; | |
385 ngx_connection_t *c; | |
386 | |
387 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, | |
388 "keepalive close handler"); | |
389 | |
390 c = ev->data; | |
391 | |
392 if (c->close) { | |
393 goto close; | |
394 } | |
395 | |
396 n = recv(c->fd, buf, 1, MSG_PEEK); | |
397 | |
398 if (n == -1 && ngx_socket_errno == NGX_EAGAIN) { | |
399 /* stale event */ | |
400 | |
401 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { | |
402 goto close; | |
403 } | |
404 | |
405 return; | |
406 } | |
407 | |
408 close: | |
409 | |
410 item = c->data; | |
411 conf = item->conf; | |
412 | |
413 ngx_http_upstream_keepalive_close(c); | |
414 | |
415 ngx_queue_remove(&item->queue); | |
416 ngx_queue_insert_head(&conf->free, &item->queue); | |
417 } | |
418 | |
419 | |
420 static void | |
421 ngx_http_upstream_keepalive_close(ngx_connection_t *c) | |
422 { | |
423 | |
424 #if (NGX_HTTP_SSL) | |
425 | |
426 if (c->ssl) { | |
427 c->ssl->no_wait_shutdown = 1; | |
428 c->ssl->no_send_shutdown = 1; | |
429 | |
430 if (ngx_ssl_shutdown(c) == NGX_AGAIN) { | |
431 c->ssl->handler = ngx_http_upstream_keepalive_close; | |
432 return; | |
433 } | |
434 } | |
435 | |
436 #endif | |
437 | |
438 ngx_destroy_pool(c->pool); | |
439 ngx_close_connection(c); | |
440 } | |
441 | |
442 | |
443 #if (NGX_HTTP_SSL) | |
444 | |
445 static ngx_int_t | |
446 ngx_http_upstream_keepalive_set_session(ngx_peer_connection_t *pc, void *data) | |
447 { | |
448 ngx_http_upstream_keepalive_peer_data_t *kp = data; | |
449 | |
450 return kp->original_set_session(pc, kp->data); | |
451 } | |
452 | |
453 | |
454 static void | |
455 ngx_http_upstream_keepalive_save_session(ngx_peer_connection_t *pc, void *data) | |
456 { | |
457 ngx_http_upstream_keepalive_peer_data_t *kp = data; | |
458 | |
459 kp->original_save_session(pc, kp->data); | |
460 return; | |
461 } | |
462 | |
463 #endif | |
464 | |
465 | |
466 static void * | |
467 ngx_http_upstream_keepalive_create_conf(ngx_conf_t *cf) | |
468 { | |
469 ngx_http_upstream_keepalive_srv_conf_t *conf; | |
470 | |
471 conf = ngx_pcalloc(cf->pool, | |
472 sizeof(ngx_http_upstream_keepalive_srv_conf_t)); | |
473 if (conf == NULL) { | |
474 return NULL; | |
475 } | |
476 | |
477 /* | |
478 * set by ngx_pcalloc(): | |
479 * | |
480 * conf->original_init_upstream = NULL; | |
481 * conf->original_init_peer = NULL; | |
482 */ | |
483 | |
484 conf->max_cached = 1; | |
485 | |
486 return conf; | |
487 } | |
488 | |
489 | |
490 static char * | |
491 ngx_http_upstream_keepalive(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
492 { | |
493 ngx_http_upstream_srv_conf_t *uscf; | |
494 ngx_http_upstream_keepalive_srv_conf_t *kcf; | |
495 | |
496 ngx_int_t n; | |
497 ngx_str_t *value; | |
498 ngx_uint_t i; | |
499 | |
500 uscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_upstream_module); | |
501 | |
502 kcf = ngx_http_conf_upstream_srv_conf(uscf, | |
503 ngx_http_upstream_keepalive_module); | |
504 | |
4998
82336a9ce26d
Upstream keepalive: detect duplicate "keepalive" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
4694
diff
changeset
|
505 if (kcf->original_init_upstream) { |
82336a9ce26d
Upstream keepalive: detect duplicate "keepalive" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
4694
diff
changeset
|
506 return "is duplicate"; |
82336a9ce26d
Upstream keepalive: detect duplicate "keepalive" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
4694
diff
changeset
|
507 } |
82336a9ce26d
Upstream keepalive: detect duplicate "keepalive" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
4694
diff
changeset
|
508 |
4127 | 509 kcf->original_init_upstream = uscf->peer.init_upstream |
510 ? uscf->peer.init_upstream | |
511 : ngx_http_upstream_init_round_robin; | |
512 | |
513 uscf->peer.init_upstream = ngx_http_upstream_init_keepalive; | |
514 | |
515 /* read options */ | |
516 | |
517 value = cf->args->elts; | |
518 | |
519 n = ngx_atoi(value[1].data, value[1].len); | |
520 | |
521 if (n == NGX_ERROR || n == 0) { | |
522 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
523 "invalid value \"%V\" in \"%V\" directive", | |
524 &value[1], &cmd->name); | |
525 return NGX_CONF_ERROR; | |
526 } | |
527 | |
528 kcf->max_cached = n; | |
529 | |
530 for (i = 2; i < cf->args->nelts; i++) { | |
531 | |
532 if (ngx_strcmp(value[i].data, "single") == 0) { | |
4694
5b5c07dee156
Upstream keepalive: "single" parameter deprecated.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
533 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
5b5c07dee156
Upstream keepalive: "single" parameter deprecated.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
534 "the \"single\" parameter is deprecated"); |
4127 | 535 continue; |
536 } | |
537 | |
538 goto invalid; | |
539 } | |
540 | |
541 return NGX_CONF_OK; | |
542 | |
543 invalid: | |
544 | |
545 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
546 "invalid parameter \"%V\"", &value[i]); | |
547 | |
548 return NGX_CONF_ERROR; | |
549 } |