1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_event.h>
10
11
12 #define DEFAULT_CONNECTIONS 512
13
14
15 extern ngx_module_t ngx_kqueue_module;
16 extern ngx_module_t ngx_eventport_module;
17 extern ngx_module_t ngx_devpoll_module;
18 extern ngx_module_t ngx_epoll_module;
19 extern ngx_module_t ngx_rtsig_module;
20 extern ngx_module_t ngx_select_module;
21
22
23 static ngx_int_t ngx_event_module_init(ngx_cycle_t *cycle);
24 static ngx_int_t ngx_event_process_init(ngx_cycle_t *cycle);
25 static char *ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
26
27 static char *ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd,
28 void *conf);
29 static char *ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
30 static char *ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd,
31 void *conf);
32
33 static void *ngx_event_create_conf(ngx_cycle_t *cycle);
34 static char *ngx_event_init_conf(ngx_cycle_t *cycle, void *conf);
35
36
37 static ngx_uint_t ngx_timer_resolution;
38 sig_atomic_t ngx_event_timer_alarm;
39
40 static ngx_uint_t ngx_event_max_module;
41
42 ngx_uint_t ngx_event_flags;
43 ngx_event_actions_t ngx_event_actions;
44
45
46 ngx_atomic_t connection_counter = 1;
47 ngx_atomic_t *ngx_connection_counter = &connection_counter;
48
49
50 ngx_atomic_t *ngx_accept_mutex_ptr;
51 ngx_shmtx_t ngx_accept_mutex;
52 ngx_uint_t ngx_use_accept_mutex;
53 ngx_uint_t ngx_accept_events;
54 ngx_uint_t ngx_accept_mutex_held;
55 ngx_msec_t ngx_accept_mutex_delay;
56 ngx_int_t ngx_accept_disabled;
57 ngx_file_t ngx_accept_mutex_lock_file;
58
59
60 #if (NGX_STAT_STUB)
61
62 ngx_atomic_t ngx_stat_accepted0;
63 ngx_atomic_t *ngx_stat_accepted = &ngx_stat_accepted0;
64 ngx_atomic_t ngx_stat_handled0;
65 ngx_atomic_t *ngx_stat_handled = &ngx_stat_handled0;
66 ngx_atomic_t ngx_stat_requests0;
67 ngx_atomic_t *ngx_stat_requests = &ngx_stat_requests0;
68 ngx_atomic_t ngx_stat_active0;
69 ngx_atomic_t *ngx_stat_active = &ngx_stat_active0;
70 ngx_atomic_t ngx_stat_reading0;
71 ngx_atomic_t *ngx_stat_reading = &ngx_stat_reading0;
72 ngx_atomic_t ngx_stat_writing0;
73 ngx_atomic_t *ngx_stat_writing = &ngx_stat_writing0;
74
75 #endif
76
77
78
79 static ngx_command_t ngx_events_commands[] = {
80
81 { ngx_string("events"),
82 NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
83 ngx_events_block,
84 0,
85 0,
86 NULL },
87
88 ngx_null_command
89 };
90
91
92 static ngx_core_module_t ngx_events_module_ctx = {
93 ngx_string("events"),
94 NULL,
95 NULL
96 };
97
98
99 ngx_module_t ngx_events_module = {
100 NGX_MODULE_V1,
101 &ngx_events_module_ctx, /* module context */
102 ngx_events_commands, /* module directives */
103 NGX_CORE_MODULE, /* module type */
104 NULL, /* init master */
105 NULL, /* init module */
106 NULL, /* init process */
107 NULL, /* init thread */
108 NULL, /* exit thread */
109 NULL, /* exit process */
110 NULL, /* exit master */
111 NGX_MODULE_V1_PADDING
112 };
113
114
115 static ngx_str_t event_core_name = ngx_string("event_core");
116
117
118 static ngx_command_t ngx_event_core_commands[] = {
119
120 { ngx_string("worker_connections"),
121 NGX_EVENT_CONF|NGX_CONF_TAKE1,
122 ngx_event_connections,
123 0,
124 0,
125 NULL },
126
127 { ngx_string("connections"),
128 NGX_EVENT_CONF|NGX_CONF_TAKE1,
129 ngx_event_connections,
130 0,
131 0,
132 NULL },
133
134 { ngx_string("use"),
135 NGX_EVENT_CONF|NGX_CONF_TAKE1,
136 ngx_event_use,
137 0,
138 0,
139 NULL },
140
141 { ngx_string("multi_accept"),
142 NGX_EVENT_CONF|NGX_CONF_FLAG,
143 ngx_conf_set_flag_slot,
144 0,
145 offsetof(ngx_event_conf_t, multi_accept),
146 NULL },
147
148 { ngx_string("accept_mutex"),
149 NGX_EVENT_CONF|NGX_CONF_FLAG,
150 ngx_conf_set_flag_slot,
151 0,
152 offsetof(ngx_event_conf_t, accept_mutex),
153 NULL },
154
155 { ngx_string("accept_mutex_delay"),
156 NGX_EVENT_CONF|NGX_CONF_TAKE1,
157 ngx_conf_set_msec_slot,
158 0,
159 offsetof(ngx_event_conf_t, accept_mutex_delay),
160 NULL },
161
162 { ngx_string("debug_connection"),
163 NGX_EVENT_CONF|NGX_CONF_TAKE1,
164 ngx_event_debug_connection,
165 0,
166 0,
167 NULL },
168
169 ngx_null_command
170 };
171
172
173 ngx_event_module_t ngx_event_core_module_ctx = {
174 &event_core_name,
175 ngx_event_create_conf, /* create configuration */
176 ngx_event_init_conf, /* init configuration */
177
178 { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
179 };
180
181
182 ngx_module_t ngx_event_core_module = {
183 NGX_MODULE_V1,
184 &ngx_event_core_module_ctx, /* module context */
185 ngx_event_core_commands, /* module directives */
186 NGX_EVENT_MODULE, /* module type */
187 NULL, /* init master */
188 ngx_event_module_init, /* init module */
189 ngx_event_process_init, /* init process */
190 NULL, /* init thread */
191 NULL, /* exit thread */
192 NULL, /* exit process */
193 NULL, /* exit master */
194 NGX_MODULE_V1_PADDING
195 };
196
197
198 void
199 ngx_process_events_and_timers(ngx_cycle_t *cycle)
200 {
201 ngx_uint_t flags;
202 ngx_msec_t timer, delta;
203
204 if (ngx_timer_resolution) {
205 timer = NGX_TIMER_INFINITE;
206 flags = 0;
207
208 } else {
209 timer = ngx_event_find_timer();
210 flags = NGX_UPDATE_TIME;
211
212 #if (NGX_THREADS)
213
214 if (timer == NGX_TIMER_INFINITE || timer > 500) {
215 timer = 500;
216 }
217
218 #endif
219 }
220
221 if (ngx_use_accept_mutex) {
222 if (ngx_accept_disabled > 0) {
223 ngx_accept_disabled--;
224
225 } else {
226 if (ngx_trylock_accept_mutex(cycle) == NGX_ERROR) {
227 return;
228 }
229
230 if (ngx_accept_mutex_held) {
231 flags |= NGX_POST_EVENTS;
232
233 } else {
234 if (timer == NGX_TIMER_INFINITE
235 || timer > ngx_accept_mutex_delay)
236 {
237 timer = ngx_accept_mutex_delay;
238 }
239 }
240 }
241 }
242
243 delta = ngx_current_msec;
244
245 (void) ngx_process_events(cycle, timer, flags);
246
247 delta = ngx_current_msec - delta;
248
249 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
250 "timer delta: %M", delta);
251
252 if (ngx_posted_accept_events) {
253 ngx_event_process_posted(cycle, &ngx_posted_accept_events);
254 }
255
256 if (ngx_accept_mutex_held) {
257 ngx_shmtx_unlock(&ngx_accept_mutex);
258 }
259
260 if (delta) {
261 ngx_event_expire_timers();
262 }
263
264 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
265 "posted events %p", ngx_posted_events);
266
267 if (ngx_posted_events) {
268 if (ngx_threaded) {
269 ngx_wakeup_worker_thread(cycle);
270
271 } else {
272 ngx_event_process_posted(cycle, &ngx_posted_events);
273 }
274 }
275 }
276
277
278 ngx_int_t
279 ngx_handle_read_event(ngx_event_t *rev, ngx_uint_t flags)
280 {
281 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
282
283 /* kqueue, epoll */
284
285 if (!rev->active && !rev->ready) {
286 if (ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT)
287 == NGX_ERROR)
288 {
289 return NGX_ERROR;
290 }
291 }
292
293 return NGX_OK;
294
295 } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
296
297 /* select, poll, /dev/poll */
298
299 if (!rev->active && !rev->ready) {
300 if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT)
301 == NGX_ERROR)
302 {
303 return NGX_ERROR;
304 }
305
306 return NGX_OK;
307 }
308
309 if (rev->active && (rev->ready || (flags & NGX_CLOSE_EVENT))) {
310 if (ngx_del_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT | flags)
311 == NGX_ERROR)
312 {
313 return NGX_ERROR;
314 }
315
316 return NGX_OK;
317 }
318
319 } else if (ngx_event_flags & NGX_USE_EVENTPORT_EVENT) {
320
321 /* event ports */
322
323 if (!rev->active && !rev->ready) {
324 if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
325 return NGX_ERROR;
326 }
327
328 return NGX_OK;
329 }
330
331 if (rev->oneshot && !rev->ready) {
332 if (ngx_del_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
333 return NGX_ERROR;
334 }
335
336 return NGX_OK;
337 }
338 }
339
340 /* aio, iocp, rtsig */
341
342 return NGX_OK;
343 }
344
345
346 ngx_int_t
347 ngx_handle_write_event(ngx_event_t *wev, size_t lowat)
348 {
349 ngx_connection_t *c;
350
351 if (lowat) {
352 c = wev->data;
353
354 if (ngx_send_lowat(c, lowat) == NGX_ERROR) {
355 return NGX_ERROR;
356 }
357 }
358
359 if (ngx_event_flags & NGX_USE_CLEAR_EVENT) {
360
361 /* kqueue, epoll */
362
363 if (!wev->active && !wev->ready) {
364 if (ngx_add_event(wev, NGX_WRITE_EVENT,
365 NGX_CLEAR_EVENT | (lowat ? NGX_LOWAT_EVENT : 0))
366 == NGX_ERROR)
367 {
368 return NGX_ERROR;
369 }
370 }
371
372 return NGX_OK;
373
374 } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
375
376 /* select, poll, /dev/poll */
377
378 if (!wev->active && !wev->ready) {
379 if (ngx_add_event(wev, NGX_WRITE_EVENT, NGX_LEVEL_EVENT)
380 == NGX_ERROR)
381 {
382 return NGX_ERROR;
383 }
384
385 return NGX_OK;
386 }
387
388 if (wev->active && wev->ready) {
389 if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_LEVEL_EVENT)
390 == NGX_ERROR)
391 {
392 return NGX_ERROR;
393 }
394
395 return NGX_OK;
396 }
397
398 } else if (ngx_event_flags & NGX_USE_EVENTPORT_EVENT) {
399
400 /* event ports */
401
402 if (!wev->active && !wev->ready) {
403 if (ngx_add_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
404 return NGX_ERROR;
405 }
406
407 return NGX_OK;
408 }
409
410 if (wev->oneshot && wev->ready) {
411 if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
412 return NGX_ERROR;
413 }
414
415 return NGX_OK;
416 }
417 }
418
419 /* aio, iocp, rtsig */
420
421 return NGX_OK;
422 }
423
424
425 static ngx_int_t
426 ngx_event_module_init(ngx_cycle_t *cycle)
427 {
428 void ***cf;
429 u_char *shared;
430 size_t size, cl;
431 ngx_shm_t shm;
432 ngx_core_conf_t *ccf;
433 ngx_event_conf_t *ecf;
434
435 cf = ngx_get_conf(cycle->conf_ctx, ngx_events_module);
436
437 if (cf == NULL) {
438 ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
439 "no \"events\" section in configuration");
440 return NGX_ERROR;
441 }
442
443 ecf = (*cf)[ngx_event_core_module.ctx_index];
444
445 if (!ngx_test_config) {
446 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
447 "using the \"%s\" event method", ecf->name);
448 }
449
450 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
451
452 ngx_timer_resolution = ccf->timer_resolution;
453
454 #if !(NGX_WIN32)
455 {
456 ngx_int_t limit;
457 struct rlimit rlmt;
458
459 if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
460 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
461 "getrlimit(RLIMIT_NOFILE) failed, ignored");
462
463 } else {
464 if (ecf->connections > (ngx_uint_t) rlmt.rlim_cur
465 && (ccf->rlimit_nofile == NGX_CONF_UNSET
466 || ecf->connections > (ngx_uint_t) ccf->rlimit_nofile))
467 {
468 limit = (ccf->rlimit_nofile == NGX_CONF_UNSET) ?
469 (ngx_int_t) rlmt.rlim_cur : ccf->rlimit_nofile;
470
471 ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
472 "%ui worker_connections are more than "
473 "open file resource limit: %i",
474 ecf->connections, limit);
475 }
476 }
477 }
478 #endif /* !(NGX_WIN32) */
479
480
481 if (ccf->master == 0) {
482 return NGX_OK;
483 }
484
485 if (ngx_accept_mutex_ptr) {
486 return NGX_OK;
487 }
488
489
490 /* cl should be equal or bigger than cache line size */
491
492 cl = 128;
493
494 size = cl /* ngx_accept_mutex */
495 + cl; /* ngx_connection_counter */
496
497 #if (NGX_STAT_STUB)
498
499 size += cl /* ngx_stat_accepted */
500 + cl /* ngx_stat_handled */
501 + cl /* ngx_stat_requests */
502 + cl /* ngx_stat_active */
503 + cl /* ngx_stat_reading */
504 + cl; /* ngx_stat_writing */
505
506 #endif
507
508 shm.size = size;
509 shm.log = cycle->log;
510
511 if (ngx_shm_alloc(&shm) != NGX_OK) {
512 return NGX_ERROR;
513 }
514
515 shared = shm.addr;
516
517 ngx_accept_mutex_ptr = (ngx_atomic_t *) shared;
518
519 if (ngx_shmtx_create(&ngx_accept_mutex, shared, cycle->lock_file.data)
520 != NGX_OK)
521 {
522 return NGX_ERROR;
523 }
524
525 ngx_connection_counter = (ngx_atomic_t *) (shared + 1 * cl);
526
527 #if (NGX_STAT_STUB)
528
529 ngx_stat_accepted = (ngx_atomic_t *) (shared + 2 * cl);
530 ngx_stat_handled = (ngx_atomic_t *) (shared + 3 * cl);
531 ngx_stat_requests = (ngx_atomic_t *) (shared + 4 * cl);
532 ngx_stat_active = (ngx_atomic_t *) (shared + 5 * cl);
533 ngx_stat_reading = (ngx_atomic_t *) (shared + 6 * cl);
534 ngx_stat_writing = (ngx_atomic_t *) (shared + 7 * cl);
535
536 #endif
537
538 *ngx_connection_counter = 1;
539
540 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
541 "counter: %p, %d",
542 ngx_connection_counter, *ngx_connection_counter);
543
544 return NGX_OK;
545 }
546
547
548 #if !(NGX_WIN32)
549
550 void
551 ngx_timer_signal_handler(int signo)
552 {
553 ngx_event_timer_alarm = 1;
554
555 ngx_time_update(0, 0);
556
557 #if 1
558 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "timer signal");
559 #endif
560 }
561
562 #endif
563
564
565 static ngx_int_t
566 ngx_event_process_init(ngx_cycle_t *cycle)
567 {
568 ngx_uint_t m, i;
569 ngx_event_t *rev, *wev;
570 ngx_listening_t *ls;
571 ngx_connection_t *c, *next, *old;
572 ngx_core_conf_t *ccf;
573 ngx_event_conf_t *ecf;
574 ngx_event_module_t *module;
575
576 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
577 ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module);
578
579 if (ccf->master && ccf->worker_processes > 1 && ecf->accept_mutex) {
580 ngx_use_accept_mutex = 1;
581 ngx_accept_mutex_held = 0;
582 ngx_accept_mutex_delay = ecf->accept_mutex_delay;
583
584 } else {
585 ngx_use_accept_mutex = 0;
586 }
587
588 #if (NGX_THREADS)
589 ngx_posted_events_mutex = ngx_mutex_init(cycle->log, 0);
590 if (ngx_posted_events_mutex == NULL) {
591 return NGX_ERROR;
592 }
593 #endif
594
595 if (ngx_event_timer_init(cycle->log) == NGX_ERROR) {
596 return NGX_ERROR;
597 }
598
599 cycle->connection_n = ecf->connections;
600
601 for (m = 0; ngx_modules[m]; m++) {
602 if (ngx_modules[m]->type != NGX_EVENT_MODULE) {
603 continue;
604 }
605
606 if (ngx_modules[m]->ctx_index == ecf->use) {
607 module = ngx_modules[m]->ctx;
608 if (module->actions.init(cycle, ngx_timer_resolution) == NGX_ERROR)
609 {
610 /* fatal */
611 exit(2);
612 }
613 break;
614 }
615 }
616
617 #if !(NGX_WIN32)
618
619 if (ngx_timer_resolution && !(ngx_event_flags & NGX_USE_TIMER_EVENT)) {
620 struct sigaction sa;
621 struct itimerval itv;
622
623 ngx_memzero(&sa, sizeof(struct sigaction));
624 sa.sa_handler = ngx_timer_signal_handler;
625 sigemptyset(&sa.sa_mask);
626
627 if (sigaction(SIGALRM, &sa, NULL) == -1) {
628 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
629 "sigaction(SIGALRM) failed");
630 return NGX_ERROR;
631 }
632
633 itv.it_interval.tv_sec = ngx_timer_resolution / 1000;
634 itv.it_interval.tv_usec = (ngx_timer_resolution % 1000) * 1000;
635 itv.it_value.tv_sec = ngx_timer_resolution / 1000;
636 itv.it_value.tv_usec = (ngx_timer_resolution % 1000 ) * 1000;
637
638 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
639 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
640 "setitimer() failed");
641 }
642 }
643
644 if (ngx_event_flags & NGX_USE_FD_EVENT) {
645 struct rlimit rlmt;
646
647 if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
648 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
649 "getrlimit(RLIMIT_NOFILE) failed");
650 return NGX_ERROR;
651 }
652
653 cycle->files_n = (ngx_uint_t) rlmt.rlim_cur;
654
655 cycle->files = ngx_calloc(sizeof(ngx_connection_t *) * cycle->files_n,
656 cycle->log);
657 if (cycle->files == NULL) {
658 return NGX_ERROR;
659 }
660 }
661
662 #endif
663
664 cycle->connections = ngx_alloc(sizeof(ngx_connection_t) * ecf->connections,
665 cycle->log);
666 if (cycle->connections == NULL) {
667 return NGX_ERROR;
668 }
669
670 c = cycle->connections;
671
672 cycle->read_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections,
673 cycle->log);
674 if (cycle->read_events == NULL) {
675 return NGX_ERROR;
676 }
677
678 rev = cycle->read_events;
679 for (i = 0; i < cycle->connection_n; i++) {
680 rev[i].closed = 1;
681 rev[i].instance = 1;
682 #if (NGX_THREADS)
683 rev[i].lock = &c[i].lock;
684 rev[i].own_lock = &c[i].lock;
685 #endif
686 }
687
688 cycle->write_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections,
689 cycle->log);
690 if (cycle->write_events == NULL) {
691 return NGX_ERROR;
692 }
693
694 wev = cycle->write_events;
695 for (i = 0; i < cycle->connection_n; i++) {
696 wev[i].closed = 1;
697 #if (NGX_THREADS)
698 wev[i].lock = &c[i].lock;
699 wev[i].own_lock = &c[i].lock;
700 #endif
701 }
702
703 i = cycle->connection_n;
704 next = NULL;
705
706 do {
707 i--;
708
709 c[i].data = next;
710 c[i].read = &cycle->read_events[i];
711 c[i].write = &cycle->write_events[i];
712 c[i].fd = (ngx_socket_t) -1;
713
714 next = &c[i];
715
716 #if (NGX_THREADS)
717 c[i].lock = 0;
718 #endif
719 } while (i);
720
721 cycle->free_connections = next;
722 cycle->free_connection_n = ecf->connections;
723
724 /* for each listening socket */
725
726 ls = cycle->listening.elts;
727 for (i = 0; i < cycle->listening.nelts; i++) {
728
729 c = ngx_get_connection(ls[i].fd, cycle->log);
730
731 if (c == NULL) {
732 return NGX_ERROR;
733 }
734
735 c->log = &ls[i].log;
736
737 c->listening = &ls[i];
738 ls[i].connection = c;
739
740 rev = c->read;
741
742 rev->log = c->log;
743 rev->accept = 1;
744
745 #if (NGX_HAVE_DEFERRED_ACCEPT)
746 rev->deferred_accept = ls[i].deferred_accept;
747 #endif
748
749 if (!(ngx_event_flags & NGX_USE_IOCP_EVENT)) {
750 if (ls[i].previous) {
751
752 /*
753 * delete the old accept events that were bound to
754 * the old cycle read events array
755 */
756
757 old = ls[i].previous->connection;
758
759 if (ngx_del_event(old->read, NGX_READ_EVENT, NGX_CLOSE_EVENT)
760 == NGX_ERROR)
761 {
762 return NGX_ERROR;
763 }
764
765 old->fd = (ngx_socket_t) -1;
766 }
767 }
768
769 #if (NGX_WIN32)
770
771 if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
772 ngx_iocp_conf_t *iocpcf;
773
774 rev->handler = ngx_event_acceptex;
775
776 if (ngx_add_event(rev, 0, NGX_IOCP_ACCEPT) == NGX_ERROR) {
777 return NGX_ERROR;
778 }
779
780 ls[i].log.handler = ngx_acceptex_log_error;
781
782 iocpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_iocp_module);
783 if (ngx_event_post_acceptex(&ls[i], iocpcf->post_acceptex)
784 == NGX_ERROR)
785 {
786 return NGX_ERROR;
787 }
788
789 } else {
790 rev->handler = ngx_event_accept;
791
792 if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
793 return NGX_ERROR;
794 }
795 }
796
797 #else
798
799 rev->handler = ngx_event_accept;
800
801 if (ngx_use_accept_mutex) {
802 continue;
803 }
804
805 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
806 if (ngx_add_conn(c) == NGX_ERROR) {
807 return NGX_ERROR;
808 }
809
810 } else {
811 if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
812 return NGX_ERROR;
813 }
814 }
815
816 #endif
817
818 }
819
820 return NGX_OK;
821 }
822
823
824 ngx_int_t
825 ngx_send_lowat(ngx_connection_t *c, size_t lowat)
826 {
827 int sndlowat;
828
829 #if (NGX_HAVE_LOWAT_EVENT)
830
831 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
832 c->write->available = lowat;
833 return NGX_OK;
834 }
835
836 #endif
837
838 if (lowat == 0 || c->sndlowat) {
839 return NGX_OK;
840 }
841
842 sndlowat = (int) lowat;
843
844 if (setsockopt(c->fd, SOL_SOCKET, SO_SNDLOWAT,
845 (const void *) &sndlowat, sizeof(int))
846 == -1)
847 {
848 ngx_connection_error(c, ngx_socket_errno,
849 "setsockopt(SO_SNDLOWAT) failed");
850 return NGX_ERROR;
851 }
852
853 c->sndlowat = 1;
854
855 return NGX_OK;
856 }
857
858
859 static char *
860 ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
861 {
862 char *rv;
863 void ***ctx;
864 ngx_uint_t i;
865 ngx_conf_t pcf;
866 ngx_event_module_t *m;
867
868 /* count the number of the event modules and set up their indices */
869
870 ngx_event_max_module = 0;
871 for (i = 0; ngx_modules[i]; i++) {
872 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
873 continue;
874 }
875
876 ngx_modules[i]->ctx_index = ngx_event_max_module++;
877 }
878
879 ctx = ngx_pcalloc(cf->pool, sizeof(void *));
880 if (ctx == NULL) {
881 return NGX_CONF_ERROR;
882 }
883
884 *ctx = ngx_pcalloc(cf->pool, ngx_event_max_module * sizeof(void *));
885 if (*ctx == NULL) {
886 return NGX_CONF_ERROR;
887 }
888
889 *(void **) conf = ctx;
890
891 for (i = 0; ngx_modules[i]; i++) {
892 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
893 continue;
894 }
895
896 m = ngx_modules[i]->ctx;
897
898 if (m->create_conf) {
899 (*ctx)[ngx_modules[i]->ctx_index] = m->create_conf(cf->cycle);
900 if ((*ctx)[ngx_modules[i]->ctx_index] == NULL) {
901 return NGX_CONF_ERROR;
902 }
903 }
904 }
905
906 pcf = *cf;
907 cf->ctx = ctx;
908 cf->module_type = NGX_EVENT_MODULE;
909 cf->cmd_type = NGX_EVENT_CONF;
910
911 rv = ngx_conf_parse(cf, NULL);
912
913 *cf = pcf;
914
915 if (rv != NGX_CONF_OK)
916 return rv;
917
918 for (i = 0; ngx_modules[i]; i++) {
919 if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
920 continue;
921 }
922
923 m = ngx_modules[i]->ctx;
924
925 if (m->init_conf) {
926 rv = m->init_conf(cf->cycle, (*ctx)[ngx_modules[i]->ctx_index]);
927 if (rv != NGX_CONF_OK) {
928 return rv;
929 }
930 }
931 }
932
933 return NGX_CONF_OK;
934 }
935
936
937 static char *
938 ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
939 {
940 ngx_event_conf_t *ecf = conf;
941
942 ngx_str_t *value;
943
944 if (ecf->connections != NGX_CONF_UNSET_UINT) {
945 return "is duplicate" ;
946 }
947
948 if (ngx_strcmp(cmd->name.data, "connections") == 0) {
949 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
950 "the \"connections\" directive is deprecated, "
951 "use the \"worker_connections\" directive instead");
952 }
953
954 value = cf->args->elts;
955 ecf->connections = ngx_atoi(value[1].data, value[1].len);
956 if (ecf->connections == (ngx_uint_t) NGX_ERROR) {
957 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
958 "invalid number \"%V\"", &value[1]);
959
960 return NGX_CONF_ERROR;
961 }
962
963 cf->cycle->connection_n = ecf->connections;
964
965 return NGX_CONF_OK;
966 }
967
968
969 static char *
970 ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
971 {
972 ngx_event_conf_t *ecf = conf;
973
974 ngx_int_t m;
975 ngx_str_t *value;
976 ngx_event_conf_t *old_ecf;
977 ngx_event_module_t *module;
978
979 if (ecf->use != NGX_CONF_UNSET_UINT) {
980 return "is duplicate" ;
981 }
982
983 value = cf->args->elts;
984
985 if (cf->cycle->old_cycle->conf_ctx) {
986 old_ecf = ngx_event_get_conf(cf->cycle->old_cycle->conf_ctx,
987 ngx_event_core_module);
988 } else {
989 old_ecf = NULL;
990 }
991
992
993 for (m = 0; ngx_modules[m]; m++) {
994 if (ngx_modules[m]->type != NGX_EVENT_MODULE) {
995 continue;
996 }
997
998 module = ngx_modules[m]->ctx;
999 if (module->name->len == value[1].len) {
1000 if (ngx_strcmp(module->name->data, value[1].data) == 0) {
1001 ecf->use = ngx_modules[m]->ctx_index;
1002 ecf->name = module->name->data;
1003
1004 if (ngx_process == NGX_PROCESS_SINGLE
1005 && old_ecf
1006 && old_ecf->use != ecf->use)
1007 {
1008 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1009 "when the server runs without a master process "
1010 "the \"%V\" event type must be the same as "
1011 "in previous configuration - \"%s\" "
1012 "and it can not be changed on the fly, "
1013 "to change it you need to stop server "
1014 "and start it again",
1015 &value[1], old_ecf->name);
1016
1017 return NGX_CONF_ERROR;
1018 }
1019
1020 return NGX_CONF_OK;
1021 }
1022 }
1023 }
1024
1025 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1026 "invalid event type \"%V\"", &value[1]);
1027
1028 return NGX_CONF_ERROR;
1029 }
1030
1031
1032 static char *
1033 ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1034 {
1035 #if (NGX_DEBUG)
1036 ngx_event_conf_t *ecf = conf;
1037
1038 ngx_int_t rc;
1039 ngx_str_t *value;
1040 ngx_event_debug_t *dc;
1041 struct hostent *h;
1042 ngx_inet_cidr_t in_cidr;
1043
1044 value = cf->args->elts;
1045
1046 /* AF_INET only */
1047
1048 dc = ngx_array_push(&ecf->debug_connection);
1049 if (dc == NULL) {
1050 return NGX_CONF_ERROR;
1051 }
1052
1053 dc->addr = inet_addr((char *) value[1].data);
1054
1055 if (dc->addr != INADDR_NONE) {
1056 dc->mask = 0xffffffff;
1057 return NGX_CONF_OK;
1058 }
1059
1060 rc = ngx_ptocidr(&value[1], &in_cidr);
1061
1062 if (rc == NGX_DONE) {
1063 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
1064 "low address bits of %V are meaningless", &value[1]);
1065 rc = NGX_OK;
1066 }
1067
1068 if (rc == NGX_OK) {
1069 dc->mask = in_cidr.mask;
1070 dc->addr = in_cidr.addr;
1071 return NGX_CONF_OK;
1072 }
1073
1074 h = gethostbyname((char *) value[1].data);
1075
1076 if (h == NULL || h->h_addr_list[0] == NULL) {
1077 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1078 "host \"%s\" not found", value[1].data);
1079 return NGX_CONF_ERROR;
1080 }
1081
1082 dc->mask = 0xffffffff;
1083 dc->addr = *(in_addr_t *)(h->h_addr_list[0]);
1084
1085 #else
1086
1087 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
1088 "\"debug_connection\" is ignored, you need to rebuild "
1089 "nginx using --with-debug option to enable it");
1090
1091 #endif
1092
1093 return NGX_CONF_OK;
1094 }
1095
1096
1097 static void *
1098 ngx_event_create_conf(ngx_cycle_t *cycle)
1099 {
1100 ngx_event_conf_t *ecf;
1101
1102 ecf = ngx_palloc(cycle->pool, sizeof(ngx_event_conf_t));
1103 if (ecf == NULL) {
1104 return NGX_CONF_ERROR;
1105 }
1106
1107 ecf->connections = NGX_CONF_UNSET_UINT;
1108 ecf->use = NGX_CONF_UNSET_UINT;
1109 ecf->multi_accept = NGX_CONF_UNSET;
1110 ecf->accept_mutex = NGX_CONF_UNSET;
1111 ecf->accept_mutex_delay = NGX_CONF_UNSET_MSEC;
1112 ecf->name = (void *) NGX_CONF_UNSET;
1113
1114 #if (NGX_DEBUG)
1115
1116 if (ngx_array_init(&ecf->debug_connection, cycle->pool, 4,
1117 sizeof(ngx_event_debug_t)) == NGX_ERROR)
1118 {
1119 return NGX_CONF_ERROR;
1120 }
1121
1122 #endif
1123
1124 return ecf;
1125 }
1126
1127
1128 static char *
1129 ngx_event_init_conf(ngx_cycle_t *cycle, void *conf)
1130 {
1131 ngx_event_conf_t *ecf = conf;
1132
1133 #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
1134 int fd;
1135 #endif
1136 #if (NGX_HAVE_RTSIG)
1137 ngx_uint_t rtsig;
1138 ngx_core_conf_t *ccf;
1139 #endif
1140 ngx_int_t i, connections;
1141 ngx_module_t *module;
1142 ngx_event_module_t *event_module;
1143
1144 connections = NGX_CONF_UNSET_UINT;
1145 module = NULL;
1146
1147 #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
1148
1149 fd = epoll_create(100);
1150
1151 if (fd != -1) {
1152 close(fd);
1153 connections = DEFAULT_CONNECTIONS;
1154 module = &ngx_epoll_module;
1155
1156 } else if (ngx_errno != NGX_ENOSYS) {
1157 connections = DEFAULT_CONNECTIONS;
1158 module = &ngx_epoll_module;
1159 }
1160
1161 #endif
1162
1163 #if (NGX_HAVE_RTSIG)
1164
1165 if (module == NULL) {
1166 connections = DEFAULT_CONNECTIONS;
1167 module = &ngx_rtsig_module;
1168 rtsig = 1;
1169
1170 } else {
1171 rtsig = 0;
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