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comparison src/event/modules/ngx_eventport_module.c @ 236:c982febb7588 NGINX_0_4_3

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nginx 0.4.3 *) Change: now the 499 error could not be redirected using an "error_page" directive. *) Feature: the Solaris 10 event ports support. *) Feature: the ngx_http_browser_module. *) Bugfix: a segmentation fault may occur while redirecting the 400 error to the proxied server using an "proxy_pass" directive. *) Bugfix: a segmentation fault occurred if an unix domain socket was used in an "proxy_pass" directive; bug appeared in 0.3.47. *) Bugfix: SSI did work with memcached and nonbuffered responses. *) Workaround: of the Sun Studio PAUSE hardware capability bug.
author Igor Sysoev <http://sysoev.ru>
date Tue, 26 Sep 2006 00:00:00 +0400
parents
children 500a3242dff6
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235:f622c719b711 236:c982febb7588
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 #if (NGX_TEST_BUILD_EVENTPORT)
13
14 #define ushort_t u_short
15 #define uint_t u_int
16
17 /* Solaris declarations */
18
19 #define PORT_SOURCE_AIO 1
20 #define PORT_SOURCE_TIMER 2
21 #define PORT_SOURCE_USER 3
22 #define PORT_SOURCE_FD 4
23 #define PORT_SOURCE_ALERT 5
24 #define PORT_SOURCE_MQ 6
25
26 #define ETIME 64
27
28 #define SIGEV_PORT 4
29
30 typedef struct {
31 int portev_events; /* event data is source specific */
32 ushort_t portev_source; /* event source */
33 ushort_t portev_pad; /* port internal use */
34 uintptr_t portev_object; /* source specific object */
35 void *portev_user; /* user cookie */
36 } port_event_t;
37
38 typedef struct port_notify {
39 int portnfy_port; /* bind request(s) to port */
40 void *portnfy_user; /* user defined */
41 } port_notify_t;
42
43 typedef struct itimerspec { /* definition per POSIX.4 */
44 struct timespec it_interval; /* timer period */
45 struct timespec it_value; /* timer expiration */
46 } itimerspec_t;
47
48 int port_create(void)
49 {
50 return -1;
51 }
52
53 int port_associate(int port, int source, uintptr_t object, int events,
54 void *user)
55 {
56 return -1;
57 }
58
59 int port_dissociate(int port, int source, uintptr_t object)
60 {
61 return -1;
62 }
63
64 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget,
65 struct timespec *timeout)
66 {
67 return -1;
68 }
69
70 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
71 {
72 return -1;
73 }
74
75 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
76 struct itimerspec *ovalue)
77 {
78 return -1;
79 }
80
81 int timer_delete(timer_t timerid)
82 {
83 return -1;
84 }
85
86 #endif
87
88
89 typedef struct {
90 u_int events;
91 } ngx_eventport_conf_t;
92
93
94 static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer);
95 static void ngx_eventport_done(ngx_cycle_t *cycle);
96 static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, int event,
97 u_int flags);
98 static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, int event,
99 u_int flags);
100 static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle,
101 ngx_msec_t timer, ngx_uint_t flags);
102
103 static void *ngx_eventport_create_conf(ngx_cycle_t *cycle);
104 static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf);
105
106 static int ep = -1;
107 static port_event_t *event_list;
108 static u_int nevents;
109 static timer_t event_timer = -1;
110
111 static ngx_str_t eventport_name = ngx_string("eventport");
112
113
114 static ngx_command_t ngx_eventport_commands[] = {
115
116 { ngx_string("eventport_events"),
117 NGX_EVENT_CONF|NGX_CONF_TAKE1,
118 ngx_conf_set_num_slot,
119 0,
120 offsetof(ngx_eventport_conf_t, events),
121 NULL },
122
123 ngx_null_command
124 };
125
126
127 ngx_event_module_t ngx_eventport_module_ctx = {
128 &eventport_name,
129 ngx_eventport_create_conf, /* create configuration */
130 ngx_eventport_init_conf, /* init configuration */
131
132 {
133 ngx_eventport_add_event, /* add an event */
134 ngx_eventport_del_event, /* delete an event */
135 ngx_eventport_add_event, /* enable an event */
136 ngx_eventport_del_event, /* disable an event */
137 NULL, /* add an connection */
138 NULL, /* delete an connection */
139 NULL, /* process the changes */
140 ngx_eventport_process_events, /* process the events */
141 ngx_eventport_init, /* init the events */
142 ngx_eventport_done, /* done the events */
143 }
144
145 };
146
147 ngx_module_t ngx_eventport_module = {
148 NGX_MODULE_V1,
149 &ngx_eventport_module_ctx, /* module context */
150 ngx_eventport_commands, /* module directives */
151 NGX_EVENT_MODULE, /* module type */
152 NULL, /* init master */
153 NULL, /* init module */
154 NULL, /* init process */
155 NULL, /* init thread */
156 NULL, /* exit thread */
157 NULL, /* exit process */
158 NULL, /* exit master */
159 NGX_MODULE_V1_PADDING
160 };
161
162
163 static ngx_int_t
164 ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer)
165 {
166 port_notify_t pn;
167 struct itimerspec its;
168 struct sigevent sev;
169 ngx_eventport_conf_t *epcf;
170
171 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module);
172
173 if (ep == -1) {
174 ep = port_create();
175
176 if (ep == -1) {
177 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
178 "port_create() failed");
179 return NGX_ERROR;
180 }
181 }
182
183 if (nevents < epcf->events) {
184 if (event_list) {
185 ngx_free(event_list);
186 }
187
188 event_list = ngx_alloc(sizeof(port_event_t) * epcf->events,
189 cycle->log);
190 if (event_list == NULL) {
191 return NGX_ERROR;
192 }
193 }
194
195 ngx_event_flags = NGX_USE_EVENTPORT_EVENT;
196
197 if (timer) {
198 ngx_memzero(&pn, sizeof(port_notify_t));
199 pn.portnfy_port = ep;
200
201 ngx_memzero(&sev, sizeof(struct sigevent));
202 sev.sigev_notify = SIGEV_PORT;
203 #if !(NGX_TEST_BUILD_EVENTPORT)
204 sev.sigev_value.sival_ptr = &pn;
205 #endif
206
207 if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) {
208 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
209 "timer_create() failed");
210 return NGX_ERROR;
211 }
212
213 its.it_interval.tv_sec = timer / 1000;
214 its.it_interval.tv_nsec = (timer % 1000) * 1000000;
215 its.it_value.tv_sec = timer / 1000;
216 its.it_value.tv_nsec = (timer % 1000) * 1000000;
217
218 if (timer_settime(event_timer, 0, &its, NULL) == -1) {
219 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
220 "timer_settime() failed");
221 return NGX_ERROR;
222 }
223
224 ngx_event_flags |= NGX_USE_TIMER_EVENT;
225 }
226
227 nevents = epcf->events;
228
229 ngx_io = ngx_os_io;
230
231 ngx_event_actions = ngx_eventport_module_ctx.actions;
232
233 return NGX_OK;
234 }
235
236
237 static void
238 ngx_eventport_done(ngx_cycle_t *cycle)
239 {
240 if (event_timer != -1) {
241 if (timer_delete(event_timer) == -1) {
242 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
243 "timer_delete() failed");
244 }
245
246 event_timer = -1;
247 }
248
249 if (close(ep) == -1) {
250 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
251 "close() event port failed");
252 }
253
254 ep = -1;
255
256 ngx_free(event_list);
257
258 event_list = NULL;
259 nevents = 0;
260 }
261
262
263 static ngx_int_t
264 ngx_eventport_add_event(ngx_event_t *ev, int event, u_int flags)
265 {
266 int events, prev;
267 ngx_event_t *e;
268 ngx_connection_t *c;
269
270 c = ev->data;
271
272 events = event;
273
274 if (event == NGX_READ_EVENT) {
275 e = c->write;
276 prev = POLLOUT;
277 #if (NGX_READ_EVENT != POLLIN)
278 events = POLLIN;
279 #endif
280
281 } else {
282 e = c->read;
283 prev = POLLIN;
284 #if (NGX_WRITE_EVENT != POLLOUT)
285 events = POLLOUT;
286 #endif
287 }
288
289 if (e->oneshot) {
290 events |= prev;
291 }
292
293 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
294 "eventport add event: fd:%d ev:%04Xd", c->fd, events);
295
296 if (port_associate(ep, PORT_SOURCE_FD, c->fd, events,
297 (void *) ((uintptr_t) ev | ev->instance))
298 == -1)
299 {
300 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
301 "port_associate() failed");
302 return NGX_ERROR;
303 }
304
305 ev->active = 1;
306 ev->oneshot = 1;
307
308 return NGX_OK;
309 }
310
311
312 static ngx_int_t
313 ngx_eventport_del_event(ngx_event_t *ev, int event, u_int flags)
314 {
315 ngx_event_t *e;
316 ngx_connection_t *c;
317
318 /*
319 * when the file descriptor is closed, the event port automatically
320 * dissociates it from the port, so we do not need to dissociate explicity
321 * the event before the closing the file descriptor
322 */
323
324 if (flags & NGX_CLOSE_EVENT) {
325 ev->active = 0;
326 ev->oneshot = 0;
327 return NGX_OK;
328 }
329
330 c = ev->data;
331
332 if (event == NGX_READ_EVENT) {
333 e = c->write;
334 event = POLLOUT;
335
336 } else {
337 e = c->read;
338 event = POLLIN;
339 }
340
341 if (e->oneshot) {
342 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
343 "eventport change event: fd:%d ev:%04Xd", c->fd, event);
344
345 if (port_associate(ep, PORT_SOURCE_FD, c->fd, event,
346 (void *) ((uintptr_t) ev | ev->instance))
347 == -1)
348 {
349 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
350 "port_associate() failed");
351 return NGX_ERROR;
352 }
353
354 } else {
355 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
356 "eventport del event: fd:%d", c->fd);
357
358 if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) {
359 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
360 "port_dissociate() failed");
361 return NGX_ERROR;
362 }
363 }
364
365 ev->active = 0;
366 ev->oneshot = 0;
367
368 return NGX_OK;
369 }
370
371
372 ngx_int_t
373 ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
374 ngx_uint_t flags)
375 {
376 int n, revents;
377 u_int events;
378 ngx_err_t err;
379 ngx_int_t instance;
380 ngx_uint_t i, level;
381 ngx_event_t *ev, *rev, *wev, **queue;
382 ngx_connection_t *c;
383 struct timespec ts, *tp;
384
385 if (timer == NGX_TIMER_INFINITE) {
386 tp = NULL;
387
388 } else {
389 ts.tv_sec = timer / 1000;
390 ts.tv_nsec = (timer % 1000) * 1000000;
391 tp = &ts;
392 }
393
394 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
395 "eventport timer: %M", timer);
396
397 events = 1;
398
399 n = port_getn(ep, event_list, nevents, &events, tp);
400
401 err = ngx_errno;
402
403 if (flags & NGX_UPDATE_TIME) {
404 ngx_time_update(0, 0);
405 }
406
407 if (n == -1) {
408 if (err == ETIME) {
409 if (timer != NGX_TIMER_INFINITE) {
410 return NGX_OK;
411 }
412
413 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
414 "port_getn() returned no events without timeout");
415 return NGX_ERROR;
416 }
417
418 level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT;
419 ngx_log_error(level, cycle->log, err, "port_getn() failed");
420 return NGX_ERROR;
421 }
422
423 if (events == 0) {
424 if (timer != NGX_TIMER_INFINITE) {
425 return NGX_OK;
426 }
427
428 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
429 "port_getn() returned no events without timeout");
430 return NGX_ERROR;
431 }
432
433 ngx_mutex_lock(ngx_posted_events_mutex);
434
435 for (i = 0; i < events; i++) {
436
437 if (event_list[i].portev_source == PORT_SOURCE_TIMER) {
438 ngx_time_update(0, 0);
439 continue;
440 }
441
442 ev = event_list[i].portev_user;
443
444 switch (event_list[i].portev_source) {
445
446 case PORT_SOURCE_FD:
447
448 instance = (uintptr_t) ev & 1;
449 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1);
450
451 if (ev->closed || ev->instance != instance) {
452
453 /*
454 * the stale event from a file descriptor
455 * that was just closed in this iteration
456 */
457
458 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
459 "eventport: stale event %p", ev);
460 continue;
461 }
462
463 revents = event_list[i].portev_events;
464
465 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
466 "eventport: fd:%d, ev:%04Xd",
467 event_list[i].portev_object, revents);
468
469 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
470 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
471 "prot_getn() error fd:%d ev:%04Xd",
472 event_list[i].portev_object, revents);
473 }
474
475 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
476 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
477 "strange port_getn() events fd:%d ev:%04Xd",
478 event_list[i].portev_object, revents);
479 }
480
481 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
482 && (revents & (POLLIN|POLLOUT)) == 0)
483 {
484 /*
485 * if the error events were returned without POLLIN or POLLOUT,
486 * then add these flags to handle the events at least in one
487 * active handler
488 */
489
490 revents |= POLLIN|POLLOUT;
491 }
492
493 c = ev->data;
494 rev = c->read;
495 wev = c->write;
496
497 rev->active = 0;
498 wev->active = 0;
499
500 if (revents & POLLIN) {
501
502 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
503 rev->posted_ready = 1;
504
505 } else {
506 rev->ready = 1;
507 }
508
509 if (flags & NGX_POST_EVENTS) {
510 queue = (ngx_event_t **) (rev->accept ?
511 &ngx_posted_accept_events : &ngx_posted_events);
512
513 ngx_locked_post_event(rev, queue);
514
515 } else {
516 rev->handler(rev);
517 }
518
519 if (rev->accept) {
520 if (ngx_use_accept_mutex) {
521 ngx_accept_events = 1;
522 continue;
523 }
524
525 if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN,
526 (void *) ((uintptr_t) ev | ev->instance))
527 == -1)
528 {
529 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
530 "port_associate() failed");
531 return NGX_ERROR;
532 }
533 }
534 }
535
536 if (revents & POLLOUT) {
537
538 if (flags & NGX_POST_THREAD_EVENTS) {
539 wev->posted_ready = 1;
540
541 } else {
542 wev->ready = 1;
543 }
544
545 if (flags & NGX_POST_EVENTS) {
546 ngx_locked_post_event(wev, &ngx_posted_events);
547
548 } else {
549 wev->handler(wev);
550 }
551 }
552
553 continue;
554
555 default:
556 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
557 "unexpected even_port object %d",
558 event_list[i].portev_object);
559 continue;
560 }
561 }
562
563 ngx_mutex_unlock(ngx_posted_events_mutex);
564
565 return NGX_OK;
566 }
567
568
569 static void *
570 ngx_eventport_create_conf(ngx_cycle_t *cycle)
571 {
572 ngx_eventport_conf_t *epcf;
573
574 epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t));
575 if (epcf == NULL) {
576 return NGX_CONF_ERROR;
577 }
578
579 epcf->events = NGX_CONF_UNSET;
580
581 return epcf;
582 }
583
584
585 static char *
586 ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf)
587 {
588 ngx_eventport_conf_t *epcf = conf;
589
590 ngx_conf_init_uint_value(epcf->events, 32);
591
592 return NGX_CONF_OK;
593 }