Mercurial > hg > nginx
annotate src/http/modules/ngx_http_upstream_keepalive_module.c @ 5984:3f568dd68af1
Cache: reduced diffs to the plus version of nginx.
No functional changes.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Tue, 17 Feb 2015 16:27:52 +0300 |
parents | 39befd3c0d84 |
children | 4d8936b1fc32 |
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_http_upstream_keepalive_peer_data_t; | |
41 | |
42 | |
43 typedef struct { | |
44 ngx_http_upstream_keepalive_srv_conf_t *conf; | |
45 | |
46 ngx_queue_t queue; | |
47 ngx_connection_t *connection; | |
48 | |
49 socklen_t socklen; | |
50 u_char sockaddr[NGX_SOCKADDRLEN]; | |
51 | |
52 } ngx_http_upstream_keepalive_cache_t; | |
53 | |
54 | |
55 static ngx_int_t ngx_http_upstream_init_keepalive_peer(ngx_http_request_t *r, | |
56 ngx_http_upstream_srv_conf_t *us); | |
57 static ngx_int_t ngx_http_upstream_get_keepalive_peer(ngx_peer_connection_t *pc, | |
58 void *data); | |
59 static void ngx_http_upstream_free_keepalive_peer(ngx_peer_connection_t *pc, | |
60 void *data, ngx_uint_t state); | |
61 | |
62 static void ngx_http_upstream_keepalive_dummy_handler(ngx_event_t *ev); | |
63 static void ngx_http_upstream_keepalive_close_handler(ngx_event_t *ev); | |
64 static void ngx_http_upstream_keepalive_close(ngx_connection_t *c); | |
65 | |
66 | |
67 #if (NGX_HTTP_SSL) | |
68 static ngx_int_t ngx_http_upstream_keepalive_set_session( | |
69 ngx_peer_connection_t *pc, void *data); | |
70 static void ngx_http_upstream_keepalive_save_session(ngx_peer_connection_t *pc, | |
71 void *data); | |
72 #endif | |
73 | |
74 static void *ngx_http_upstream_keepalive_create_conf(ngx_conf_t *cf); | |
75 static char *ngx_http_upstream_keepalive(ngx_conf_t *cf, ngx_command_t *cmd, | |
76 void *conf); | |
77 | |
78 | |
79 static ngx_command_t ngx_http_upstream_keepalive_commands[] = { | |
80 | |
81 { ngx_string("keepalive"), | |
5830
3e5b630e0ec9
Upstream keepalive: removed "single" parameter remnants.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5213
diff
changeset
|
82 NGX_HTTP_UPS_CONF|NGX_CONF_TAKE1, |
4127 | 83 ngx_http_upstream_keepalive, |
5213
822b82191940
Upstream keepalive: slightly simplified code.
Ruslan Ermilov <ru@nginx.com>
parents:
5133
diff
changeset
|
84 NGX_HTTP_SRV_CONF_OFFSET, |
4127 | 85 0, |
86 NULL }, | |
87 | |
88 ngx_null_command | |
89 }; | |
90 | |
91 | |
92 static ngx_http_module_t ngx_http_upstream_keepalive_module_ctx = { | |
93 NULL, /* preconfiguration */ | |
94 NULL, /* postconfiguration */ | |
95 | |
96 NULL, /* create main configuration */ | |
97 NULL, /* init main configuration */ | |
98 | |
99 ngx_http_upstream_keepalive_create_conf, /* create server configuration */ | |
100 NULL, /* merge server configuration */ | |
101 | |
102 NULL, /* create location configuration */ | |
103 NULL /* merge location configuration */ | |
104 }; | |
105 | |
106 | |
107 ngx_module_t ngx_http_upstream_keepalive_module = { | |
108 NGX_MODULE_V1, | |
109 &ngx_http_upstream_keepalive_module_ctx, /* module context */ | |
110 ngx_http_upstream_keepalive_commands, /* module directives */ | |
111 NGX_HTTP_MODULE, /* module type */ | |
112 NULL, /* init master */ | |
113 NULL, /* init module */ | |
114 NULL, /* init process */ | |
115 NULL, /* init thread */ | |
116 NULL, /* exit thread */ | |
117 NULL, /* exit process */ | |
118 NULL, /* exit master */ | |
119 NGX_MODULE_V1_PADDING | |
120 }; | |
121 | |
122 | |
123 static ngx_int_t | |
124 ngx_http_upstream_init_keepalive(ngx_conf_t *cf, | |
125 ngx_http_upstream_srv_conf_t *us) | |
126 { | |
127 ngx_uint_t i; | |
128 ngx_http_upstream_keepalive_srv_conf_t *kcf; | |
129 ngx_http_upstream_keepalive_cache_t *cached; | |
130 | |
131 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, cf->log, 0, | |
132 "init keepalive"); | |
133 | |
134 kcf = ngx_http_conf_upstream_srv_conf(us, | |
135 ngx_http_upstream_keepalive_module); | |
136 | |
137 if (kcf->original_init_upstream(cf, us) != NGX_OK) { | |
138 return NGX_ERROR; | |
139 } | |
140 | |
141 kcf->original_init_peer = us->peer.init; | |
142 | |
143 us->peer.init = ngx_http_upstream_init_keepalive_peer; | |
144 | |
145 /* allocate cache items and add to free queue */ | |
146 | |
147 cached = ngx_pcalloc(cf->pool, | |
148 sizeof(ngx_http_upstream_keepalive_cache_t) * kcf->max_cached); | |
149 if (cached == NULL) { | |
150 return NGX_ERROR; | |
151 } | |
152 | |
153 ngx_queue_init(&kcf->cache); | |
154 ngx_queue_init(&kcf->free); | |
155 | |
156 for (i = 0; i < kcf->max_cached; i++) { | |
157 ngx_queue_insert_head(&kcf->free, &cached[i].queue); | |
158 cached[i].conf = kcf; | |
159 } | |
160 | |
161 return NGX_OK; | |
162 } | |
163 | |
164 | |
165 static ngx_int_t | |
166 ngx_http_upstream_init_keepalive_peer(ngx_http_request_t *r, | |
167 ngx_http_upstream_srv_conf_t *us) | |
168 { | |
169 ngx_http_upstream_keepalive_peer_data_t *kp; | |
170 ngx_http_upstream_keepalive_srv_conf_t *kcf; | |
171 | |
172 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
173 "init keepalive peer"); | |
174 | |
175 kcf = ngx_http_conf_upstream_srv_conf(us, | |
176 ngx_http_upstream_keepalive_module); | |
177 | |
178 kp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_keepalive_peer_data_t)); | |
179 if (kp == NULL) { | |
180 return NGX_ERROR; | |
181 } | |
182 | |
183 if (kcf->original_init_peer(r, us) != NGX_OK) { | |
184 return NGX_ERROR; | |
185 } | |
186 | |
187 kp->conf = kcf; | |
188 kp->upstream = r->upstream; | |
189 kp->data = r->upstream->peer.data; | |
190 kp->original_get_peer = r->upstream->peer.get; | |
191 kp->original_free_peer = r->upstream->peer.free; | |
192 | |
193 r->upstream->peer.data = kp; | |
194 r->upstream->peer.get = ngx_http_upstream_get_keepalive_peer; | |
195 r->upstream->peer.free = ngx_http_upstream_free_keepalive_peer; | |
196 | |
197 #if (NGX_HTTP_SSL) | |
198 kp->original_set_session = r->upstream->peer.set_session; | |
199 kp->original_save_session = r->upstream->peer.save_session; | |
200 r->upstream->peer.set_session = ngx_http_upstream_keepalive_set_session; | |
201 r->upstream->peer.save_session = ngx_http_upstream_keepalive_save_session; | |
202 #endif | |
203 | |
204 return NGX_OK; | |
205 } | |
206 | |
207 | |
208 static ngx_int_t | |
209 ngx_http_upstream_get_keepalive_peer(ngx_peer_connection_t *pc, void *data) | |
210 { | |
211 ngx_http_upstream_keepalive_peer_data_t *kp = data; | |
212 ngx_http_upstream_keepalive_cache_t *item; | |
213 | |
214 ngx_int_t rc; | |
215 ngx_queue_t *q, *cache; | |
216 ngx_connection_t *c; | |
217 | |
218 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
219 "get keepalive peer"); | |
220 | |
4694
5b5c07dee156
Upstream keepalive: "single" parameter deprecated.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
221 /* ask balancer */ |
4127 | 222 |
223 rc = kp->original_get_peer(pc, kp->data); | |
224 | |
4694
5b5c07dee156
Upstream keepalive: "single" parameter deprecated.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4412
diff
changeset
|
225 if (rc != NGX_OK) { |
4127 | 226 return rc; |
227 } | |
228 | |
229 /* search cache for suitable connection */ | |
230 | |
231 cache = &kp->conf->cache; | |
232 | |
233 for (q = ngx_queue_head(cache); | |
234 q != ngx_queue_sentinel(cache); | |
235 q = ngx_queue_next(q)) | |
236 { | |
237 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); | |
238 c = item->connection; | |
239 | |
240 if (ngx_memn2cmp((u_char *) &item->sockaddr, (u_char *) pc->sockaddr, | |
241 item->socklen, pc->socklen) | |
242 == 0) | |
243 { | |
244 ngx_queue_remove(q); | |
245 ngx_queue_insert_head(&kp->conf->free, q); | |
246 | |
247 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
248 "get keepalive peer: using connection %p", c); | |
249 | |
250 c->idle = 0; | |
5864
39befd3c0d84
Upstream keepalive: reset c->sent on cached connections.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5830
diff
changeset
|
251 c->sent = 0; |
4127 | 252 c->log = pc->log; |
253 c->read->log = pc->log; | |
254 c->write->log = pc->log; | |
255 c->pool->log = pc->log; | |
256 | |
257 pc->connection = c; | |
258 pc->cached = 1; | |
259 | |
260 return NGX_DONE; | |
261 } | |
262 } | |
263 | |
264 return NGX_OK; | |
265 } | |
266 | |
267 | |
268 static void | |
269 ngx_http_upstream_free_keepalive_peer(ngx_peer_connection_t *pc, void *data, | |
270 ngx_uint_t state) | |
271 { | |
272 ngx_http_upstream_keepalive_peer_data_t *kp = data; | |
273 ngx_http_upstream_keepalive_cache_t *item; | |
274 | |
275 ngx_queue_t *q; | |
276 ngx_connection_t *c; | |
277 ngx_http_upstream_t *u; | |
278 | |
279 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
280 "free keepalive peer"); | |
281 | |
282 /* cache valid connections */ | |
283 | |
284 u = kp->upstream; | |
285 c = pc->connection; | |
286 | |
5133
089a662c17d1
Upstream: removed double-free workarounds in peer.free() methods.
Ruslan Ermilov <ru@nginx.com>
parents:
4998
diff
changeset
|
287 if (state & NGX_PEER_FAILED |
4127 | 288 || c == NULL |
289 || c->read->eof | |
290 || c->read->error | |
291 || c->read->timedout | |
292 || c->write->error | |
293 || c->write->timedout) | |
294 { | |
295 goto invalid; | |
296 } | |
297 | |
298 if (!u->keepalive) { | |
299 goto invalid; | |
300 } | |
301 | |
302 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { | |
303 goto invalid; | |
304 } | |
305 | |
306 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, | |
307 "free keepalive peer: saving connection %p", c); | |
308 | |
309 if (ngx_queue_empty(&kp->conf->free)) { | |
310 | |
311 q = ngx_queue_last(&kp->conf->cache); | |
312 ngx_queue_remove(q); | |
313 | |
314 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); | |
315 | |
316 ngx_http_upstream_keepalive_close(item->connection); | |
317 | |
318 } else { | |
319 q = ngx_queue_head(&kp->conf->free); | |
320 ngx_queue_remove(q); | |
321 | |
322 item = ngx_queue_data(q, ngx_http_upstream_keepalive_cache_t, queue); | |
323 } | |
324 | |
325 item->connection = c; | |
326 ngx_queue_insert_head(&kp->conf->cache, q); | |
327 | |
328 pc->connection = NULL; | |
329 | |
330 if (c->read->timer_set) { | |
331 ngx_del_timer(c->read); | |
332 } | |
333 if (c->write->timer_set) { | |
334 ngx_del_timer(c->write); | |
335 } | |
336 | |
337 c->write->handler = ngx_http_upstream_keepalive_dummy_handler; | |
338 c->read->handler = ngx_http_upstream_keepalive_close_handler; | |
339 | |
340 c->data = item; | |
341 c->idle = 1; | |
342 c->log = ngx_cycle->log; | |
343 c->read->log = ngx_cycle->log; | |
344 c->write->log = ngx_cycle->log; | |
345 c->pool->log = ngx_cycle->log; | |
346 | |
347 item->socklen = pc->socklen; | |
348 ngx_memcpy(&item->sockaddr, pc->sockaddr, pc->socklen); | |
349 | |
350 if (c->read->ready) { | |
351 ngx_http_upstream_keepalive_close_handler(c->read); | |
352 } | |
353 | |
354 invalid: | |
355 | |
356 kp->original_free_peer(pc, kp->data, state); | |
357 } | |
358 | |
359 | |
360 static void | |
361 ngx_http_upstream_keepalive_dummy_handler(ngx_event_t *ev) | |
362 { | |
363 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, | |
364 "keepalive dummy handler"); | |
365 } | |
366 | |
367 | |
368 static void | |
369 ngx_http_upstream_keepalive_close_handler(ngx_event_t *ev) | |
370 { | |
371 ngx_http_upstream_keepalive_srv_conf_t *conf; | |
372 ngx_http_upstream_keepalive_cache_t *item; | |
373 | |
374 int n; | |
375 char buf[1]; | |
376 ngx_connection_t *c; | |
377 | |
378 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, | |
379 "keepalive close handler"); | |
380 | |
381 c = ev->data; | |
382 | |
383 if (c->close) { | |
384 goto close; | |
385 } | |
386 | |
387 n = recv(c->fd, buf, 1, MSG_PEEK); | |
388 | |
389 if (n == -1 && ngx_socket_errno == NGX_EAGAIN) { | |
390 /* stale event */ | |
391 | |
392 if (ngx_handle_read_event(c->read, 0) != NGX_OK) { | |
393 goto close; | |
394 } | |
395 | |
396 return; | |
397 } | |
398 | |
399 close: | |
400 | |
401 item = c->data; | |
402 conf = item->conf; | |
403 | |
404 ngx_http_upstream_keepalive_close(c); | |
405 | |
406 ngx_queue_remove(&item->queue); | |
407 ngx_queue_insert_head(&conf->free, &item->queue); | |
408 } | |
409 | |
410 | |
411 static void | |
412 ngx_http_upstream_keepalive_close(ngx_connection_t *c) | |
413 { | |
414 | |
415 #if (NGX_HTTP_SSL) | |
416 | |
417 if (c->ssl) { | |
418 c->ssl->no_wait_shutdown = 1; | |
419 c->ssl->no_send_shutdown = 1; | |
420 | |
421 if (ngx_ssl_shutdown(c) == NGX_AGAIN) { | |
422 c->ssl->handler = ngx_http_upstream_keepalive_close; | |
423 return; | |
424 } | |
425 } | |
426 | |
427 #endif | |
428 | |
429 ngx_destroy_pool(c->pool); | |
430 ngx_close_connection(c); | |
431 } | |
432 | |
433 | |
434 #if (NGX_HTTP_SSL) | |
435 | |
436 static ngx_int_t | |
437 ngx_http_upstream_keepalive_set_session(ngx_peer_connection_t *pc, void *data) | |
438 { | |
439 ngx_http_upstream_keepalive_peer_data_t *kp = data; | |
440 | |
441 return kp->original_set_session(pc, kp->data); | |
442 } | |
443 | |
444 | |
445 static void | |
446 ngx_http_upstream_keepalive_save_session(ngx_peer_connection_t *pc, void *data) | |
447 { | |
448 ngx_http_upstream_keepalive_peer_data_t *kp = data; | |
449 | |
450 kp->original_save_session(pc, kp->data); | |
451 return; | |
452 } | |
453 | |
454 #endif | |
455 | |
456 | |
457 static void * | |
458 ngx_http_upstream_keepalive_create_conf(ngx_conf_t *cf) | |
459 { | |
460 ngx_http_upstream_keepalive_srv_conf_t *conf; | |
461 | |
462 conf = ngx_pcalloc(cf->pool, | |
463 sizeof(ngx_http_upstream_keepalive_srv_conf_t)); | |
464 if (conf == NULL) { | |
465 return NULL; | |
466 } | |
467 | |
468 /* | |
469 * set by ngx_pcalloc(): | |
470 * | |
471 * conf->original_init_upstream = NULL; | |
472 * conf->original_init_peer = NULL; | |
473 */ | |
474 | |
475 conf->max_cached = 1; | |
476 | |
477 return conf; | |
478 } | |
479 | |
480 | |
481 static char * | |
482 ngx_http_upstream_keepalive(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
483 { | |
484 ngx_http_upstream_srv_conf_t *uscf; | |
5213
822b82191940
Upstream keepalive: slightly simplified code.
Ruslan Ermilov <ru@nginx.com>
parents:
5133
diff
changeset
|
485 ngx_http_upstream_keepalive_srv_conf_t *kcf = conf; |
4127 | 486 |
487 ngx_int_t n; | |
488 ngx_str_t *value; | |
489 | |
490 uscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_upstream_module); | |
491 | |
4998
82336a9ce26d
Upstream keepalive: detect duplicate "keepalive" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
4694
diff
changeset
|
492 if (kcf->original_init_upstream) { |
82336a9ce26d
Upstream keepalive: detect duplicate "keepalive" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
4694
diff
changeset
|
493 return "is duplicate"; |
82336a9ce26d
Upstream keepalive: detect duplicate "keepalive" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
4694
diff
changeset
|
494 } |
82336a9ce26d
Upstream keepalive: detect duplicate "keepalive" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
4694
diff
changeset
|
495 |
4127 | 496 kcf->original_init_upstream = uscf->peer.init_upstream |
497 ? uscf->peer.init_upstream | |
498 : ngx_http_upstream_init_round_robin; | |
499 | |
500 uscf->peer.init_upstream = ngx_http_upstream_init_keepalive; | |
501 | |
502 /* read options */ | |
503 | |
504 value = cf->args->elts; | |
505 | |
506 n = ngx_atoi(value[1].data, value[1].len); | |
507 | |
508 if (n == NGX_ERROR || n == 0) { | |
509 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
510 "invalid value \"%V\" in \"%V\" directive", | |
511 &value[1], &cmd->name); | |
512 return NGX_CONF_ERROR; | |
513 } | |
514 | |
515 kcf->max_cached = n; | |
516 | |
517 return NGX_CONF_OK; | |
518 } |