0
|
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
|
18
|
12 #if (NGX_TEST_BUILD_DEVPOLL)
|
0
|
13
|
|
14 /* Solaris declarations */
|
|
15
|
|
16 #define POLLREMOVE 0x0800
|
|
17 #define DP_POLL 0xD001
|
|
18
|
|
19 struct dvpoll {
|
|
20 struct pollfd *dp_fds;
|
|
21 int dp_nfds;
|
|
22 int dp_timeout;
|
|
23 };
|
|
24
|
|
25 #endif
|
|
26
|
|
27
|
|
28 typedef struct {
|
|
29 u_int changes;
|
|
30 u_int events;
|
|
31 } ngx_devpoll_conf_t;
|
|
32
|
|
33
|
112
|
34 static ngx_int_t ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer);
|
0
|
35 static void ngx_devpoll_done(ngx_cycle_t *cycle);
|
48
|
36 static ngx_int_t ngx_devpoll_add_event(ngx_event_t *ev, int event, u_int flags);
|
|
37 static ngx_int_t ngx_devpoll_del_event(ngx_event_t *ev, int event, u_int flags);
|
|
38 static ngx_int_t ngx_devpoll_set_event(ngx_event_t *ev, int event, u_int flags);
|
112
|
39 static ngx_int_t ngx_devpoll_process_events(ngx_cycle_t *cycle,
|
|
40 ngx_msec_t timer, ngx_uint_t flags);
|
0
|
41
|
|
42 static void *ngx_devpoll_create_conf(ngx_cycle_t *cycle);
|
|
43 static char *ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf);
|
|
44
|
|
45 static int dp = -1;
|
|
46 static struct pollfd *change_list, *event_list;
|
|
47 static u_int nchanges, max_changes, nevents;
|
|
48
|
|
49 static ngx_event_t **change_index;
|
|
50
|
|
51
|
|
52 static ngx_str_t devpoll_name = ngx_string("/dev/poll");
|
|
53
|
|
54 static ngx_command_t ngx_devpoll_commands[] = {
|
|
55
|
48
|
56 { ngx_string("devpoll_changes"),
|
|
57 NGX_EVENT_CONF|NGX_CONF_TAKE1,
|
|
58 ngx_conf_set_num_slot,
|
|
59 0,
|
|
60 offsetof(ngx_devpoll_conf_t, changes),
|
|
61 NULL },
|
0
|
62
|
48
|
63 { ngx_string("devpoll_events"),
|
|
64 NGX_EVENT_CONF|NGX_CONF_TAKE1,
|
|
65 ngx_conf_set_num_slot,
|
|
66 0,
|
|
67 offsetof(ngx_devpoll_conf_t, events),
|
|
68 NULL },
|
0
|
69
|
48
|
70 ngx_null_command
|
0
|
71 };
|
|
72
|
|
73
|
|
74 ngx_event_module_t ngx_devpoll_module_ctx = {
|
|
75 &devpoll_name,
|
|
76 ngx_devpoll_create_conf, /* create configuration */
|
|
77 ngx_devpoll_init_conf, /* init configuration */
|
|
78
|
|
79 {
|
|
80 ngx_devpoll_add_event, /* add an event */
|
|
81 ngx_devpoll_del_event, /* delete an event */
|
|
82 ngx_devpoll_add_event, /* enable an event */
|
|
83 ngx_devpoll_del_event, /* disable an event */
|
|
84 NULL, /* add an connection */
|
|
85 NULL, /* delete an connection */
|
|
86 NULL, /* process the changes */
|
|
87 ngx_devpoll_process_events, /* process the events */
|
|
88 ngx_devpoll_init, /* init the events */
|
|
89 ngx_devpoll_done, /* done the events */
|
|
90 }
|
|
91
|
|
92 };
|
|
93
|
|
94 ngx_module_t ngx_devpoll_module = {
|
58
|
95 NGX_MODULE_V1,
|
0
|
96 &ngx_devpoll_module_ctx, /* module context */
|
|
97 ngx_devpoll_commands, /* module directives */
|
|
98 NGX_EVENT_MODULE, /* module type */
|
90
|
99 NULL, /* init master */
|
0
|
100 NULL, /* init module */
|
90
|
101 NULL, /* init process */
|
|
102 NULL, /* init thread */
|
|
103 NULL, /* exit thread */
|
|
104 NULL, /* exit process */
|
|
105 NULL, /* exit master */
|
|
106 NGX_MODULE_V1_PADDING
|
0
|
107 };
|
|
108
|
|
109
|
48
|
110 static ngx_int_t
|
112
|
111 ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
|
0
|
112 {
|
|
113 size_t n;
|
|
114 ngx_devpoll_conf_t *dpcf;
|
|
115
|
|
116 dpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_devpoll_module);
|
|
117
|
|
118 if (dp == -1) {
|
|
119 dp = open("/dev/poll", O_RDWR);
|
|
120
|
|
121 if (dp == -1) {
|
|
122 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
123 "open(/dev/poll) failed");
|
|
124 return NGX_ERROR;
|
|
125 }
|
|
126 }
|
|
127
|
|
128 if (max_changes < dpcf->changes) {
|
|
129 if (nchanges) {
|
|
130 n = nchanges * sizeof(struct pollfd);
|
|
131 if (write(dp, change_list, n) != (ssize_t) n) {
|
|
132 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
133 "write(/dev/poll) failed");
|
|
134 return NGX_ERROR;
|
|
135 }
|
|
136
|
|
137 nchanges = 0;
|
|
138 }
|
|
139
|
|
140 if (change_list) {
|
|
141 ngx_free(change_list);
|
|
142 }
|
|
143
|
50
|
144 change_list = ngx_alloc(sizeof(struct pollfd) * dpcf->changes,
|
|
145 cycle->log);
|
|
146 if (change_list == NULL) {
|
|
147 return NGX_ERROR;
|
|
148 }
|
0
|
149
|
|
150 if (change_index) {
|
|
151 ngx_free(change_index);
|
|
152 }
|
|
153
|
50
|
154 change_index = ngx_alloc(sizeof(ngx_event_t *) * dpcf->changes,
|
|
155 cycle->log);
|
|
156 if (change_index == NULL) {
|
|
157 return NGX_ERROR;
|
|
158 }
|
0
|
159 }
|
|
160
|
|
161 max_changes = dpcf->changes;
|
|
162
|
|
163 if (nevents < dpcf->events) {
|
|
164 if (event_list) {
|
|
165 ngx_free(event_list);
|
|
166 }
|
|
167
|
50
|
168 event_list = ngx_alloc(sizeof(struct pollfd) * dpcf->events,
|
|
169 cycle->log);
|
|
170 if (event_list == NULL) {
|
|
171 return NGX_ERROR;
|
|
172 }
|
0
|
173 }
|
|
174
|
|
175 nevents = dpcf->events;
|
|
176
|
|
177 ngx_io = ngx_os_io;
|
|
178
|
|
179 ngx_event_actions = ngx_devpoll_module_ctx.actions;
|
|
180
|
92
|
181 ngx_event_flags = NGX_USE_LEVEL_EVENT|NGX_USE_FD_EVENT;
|
0
|
182
|
|
183 return NGX_OK;
|
|
184 }
|
|
185
|
|
186
|
48
|
187 static void
|
|
188 ngx_devpoll_done(ngx_cycle_t *cycle)
|
0
|
189 {
|
|
190 if (close(dp) == -1) {
|
|
191 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
192 "close(/dev/poll) failed");
|
|
193 }
|
|
194
|
|
195 dp = -1;
|
|
196
|
|
197 ngx_free(change_list);
|
|
198 ngx_free(event_list);
|
|
199 ngx_free(change_index);
|
|
200
|
|
201 change_list = NULL;
|
|
202 event_list = NULL;
|
|
203 change_index = NULL;
|
|
204 max_changes = 0;
|
|
205 nchanges = 0;
|
|
206 nevents = 0;
|
|
207 }
|
|
208
|
|
209
|
48
|
210 static ngx_int_t
|
|
211 ngx_devpoll_add_event(ngx_event_t *ev, int event, u_int flags)
|
0
|
212 {
|
|
213 #if (NGX_DEBUG)
|
|
214 ngx_connection_t *c;
|
|
215 #endif
|
|
216
|
|
217 #if (NGX_READ_EVENT != POLLIN)
|
2
|
218 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
|
0
|
219 #endif
|
|
220
|
|
221 #if (NGX_DEBUG)
|
|
222 c = ev->data;
|
|
223 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
10
|
224 "devpoll add event: fd:%d ev:%04Xd", c->fd, event);
|
0
|
225 #endif
|
|
226
|
|
227 ev->active = 1;
|
2
|
228
|
0
|
229 return ngx_devpoll_set_event(ev, event, 0);
|
|
230 }
|
|
231
|
|
232
|
48
|
233 static ngx_int_t
|
|
234 ngx_devpoll_del_event(ngx_event_t *ev, int event, u_int flags)
|
0
|
235 {
|
|
236 ngx_event_t *e;
|
|
237 ngx_connection_t *c;
|
|
238
|
|
239 c = ev->data;
|
|
240
|
2
|
241 #if (NGX_READ_EVENT != POLLIN)
|
|
242 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
|
|
243 #endif
|
|
244
|
0
|
245 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
10
|
246 "devpoll del event: fd:%d ev:%04Xd", c->fd, event);
|
0
|
247
|
|
248 if (ngx_devpoll_set_event(ev, POLLREMOVE, flags) == NGX_ERROR) {
|
|
249 return NGX_ERROR;
|
|
250 }
|
|
251
|
|
252 ev->active = 0;
|
|
253
|
|
254 if (flags & NGX_CLOSE_EVENT) {
|
|
255 return NGX_OK;
|
|
256 }
|
|
257
|
2
|
258 /* restore the paired event if it exists */
|
0
|
259
|
2
|
260 if (event == POLLIN) {
|
0
|
261 e = c->write;
|
|
262 event = POLLOUT;
|
|
263
|
|
264 } else {
|
|
265 e = c->read;
|
|
266 event = POLLIN;
|
|
267 }
|
|
268
|
2
|
269 if (e && e->active) {
|
0
|
270 return ngx_devpoll_set_event(e, event, 0);
|
|
271 }
|
|
272
|
|
273 return NGX_OK;
|
|
274 }
|
|
275
|
|
276
|
48
|
277 static ngx_int_t
|
|
278 ngx_devpoll_set_event(ngx_event_t *ev, int event, u_int flags)
|
0
|
279 {
|
|
280 size_t n;
|
|
281 ngx_connection_t *c;
|
|
282
|
|
283 c = ev->data;
|
|
284
|
|
285 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
10
|
286 "devpoll fd:%d ev:%04Xd fl:%04Xd", c->fd, event, flags);
|
0
|
287
|
|
288 if (nchanges >= max_changes) {
|
|
289 ngx_log_error(NGX_LOG_WARN, ev->log, 0,
|
|
290 "/dev/pool change list is filled up");
|
|
291
|
|
292 n = nchanges * sizeof(struct pollfd);
|
|
293 if (write(dp, change_list, n) != (ssize_t) n) {
|
|
294 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
295 "write(/dev/poll) failed");
|
|
296 return NGX_ERROR;
|
|
297 }
|
|
298
|
|
299 nchanges = 0;
|
|
300 }
|
|
301
|
|
302 change_list[nchanges].fd = c->fd;
|
|
303 change_list[nchanges].events = event;
|
|
304 change_list[nchanges].revents = 0;
|
|
305
|
|
306 change_index[nchanges] = ev;
|
|
307 ev->index = nchanges;
|
|
308
|
|
309 nchanges++;
|
|
310
|
|
311 if (flags & NGX_CLOSE_EVENT) {
|
|
312 n = nchanges * sizeof(struct pollfd);
|
|
313 if (write(dp, change_list, n) != (ssize_t) n) {
|
|
314 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
315 "write(/dev/poll) failed");
|
|
316 return NGX_ERROR;
|
|
317 }
|
|
318
|
|
319 nchanges = 0;
|
|
320 }
|
|
321
|
|
322 return NGX_OK;
|
|
323 }
|
|
324
|
|
325
|
48
|
326 ngx_int_t
|
112
|
327 ngx_devpoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
|
|
328 ngx_uint_t flags)
|
0
|
329 {
|
32
|
330 int events, revents;
|
106
|
331 size_t n;
|
|
332 ngx_err_t err;
|
0
|
333 ngx_int_t i;
|
112
|
334 ngx_uint_t level;
|
|
335 ngx_event_t *rev, *wev, **queue;
|
0
|
336 ngx_connection_t *c;
|
|
337 struct dvpoll dvp;
|
|
338
|
|
339 /* NGX_TIMER_INFINITE == INFTIM */
|
|
340
|
|
341 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
106
|
342 "devpoll timer: %M", timer);
|
0
|
343
|
|
344 if (nchanges) {
|
|
345 n = nchanges * sizeof(struct pollfd);
|
|
346 if (write(dp, change_list, n) != (ssize_t) n) {
|
|
347 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
348 "write(/dev/poll) failed");
|
|
349 return NGX_ERROR;
|
|
350 }
|
116
|
351
|
|
352 nchanges = 0;
|
0
|
353 }
|
|
354
|
|
355 dvp.dp_fds = event_list;
|
|
356 dvp.dp_nfds = nevents;
|
|
357 dvp.dp_timeout = timer;
|
|
358 events = ioctl(dp, DP_POLL, &dvp);
|
|
359
|
|
360 if (events == -1) {
|
|
361 err = ngx_errno;
|
|
362 } else {
|
|
363 err = 0;
|
|
364 }
|
|
365
|
112
|
366 if (flags & NGX_UPDATE_TIME) {
|
|
367 ngx_time_update(0, 0);
|
|
368 }
|
0
|
369
|
|
370 if (err) {
|
112
|
371 if (err == NGX_EINTR) {
|
|
372
|
|
373 if (ngx_event_timer_alarm) {
|
|
374 ngx_event_timer_alarm = 0;
|
|
375 return NGX_OK;
|
|
376 }
|
126
|
377
|
112
|
378 level = NGX_LOG_INFO;
|
126
|
379
|
|
380 } else {
|
112
|
381 level = NGX_LOG_ALERT;
|
|
382 }
|
|
383
|
|
384 ngx_log_error(level, cycle->log, err, "ioctl(DP_POLL) failed");
|
0
|
385 return NGX_ERROR;
|
|
386 }
|
|
387
|
116
|
388 if (events == 0) {
|
|
389 if (timer != NGX_TIMER_INFINITE) {
|
|
390 return NGX_OK;
|
|
391 }
|
0
|
392
|
116
|
393 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
394 "ioctl(DP_POLL) returned no events without timeout");
|
|
395 return NGX_ERROR;
|
0
|
396 }
|
|
397
|
112
|
398 ngx_mutex_lock(ngx_posted_events_mutex);
|
0
|
399
|
|
400 for (i = 0; i < events; i++) {
|
92
|
401 c = ngx_cycle->files[event_list[i].fd];
|
0
|
402
|
|
403 if (c->fd == -1) {
|
92
|
404 if (c->read->closed) {
|
22
|
405 continue;
|
|
406 }
|
|
407
|
|
408 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "unexpected event");
|
|
409 continue;
|
|
410 }
|
|
411
|
32
|
412 revents = event_list[i].revents;
|
|
413
|
0
|
414 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
415 "devpoll: fd:%d, ev:%04Xd, rev:%04Xd",
|
32
|
416 event_list[i].fd, event_list[i].events, revents);
|
0
|
417
|
32
|
418 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
|
292
|
419 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
420 "ioctl(DP_POLL) error fd:%d ev:%04Xd rev:%04Xd",
|
32
|
421 event_list[i].fd, event_list[i].events, revents);
|
0
|
422 }
|
|
423
|
32
|
424 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
|
0
|
425 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
426 "strange ioctl(DP_POLL) events "
|
10
|
427 "fd:%d ev:%04Xd rev:%04Xd",
|
32
|
428 event_list[i].fd, event_list[i].events, revents);
|
|
429 }
|
|
430
|
|
431 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
|
|
432 && (revents & (POLLIN|POLLOUT)) == 0)
|
|
433 {
|
|
434 /*
|
|
435 * if the error events were returned without POLLIN or POLLOUT,
|
|
436 * then add these flags to handle the events at least in one
|
126
|
437 * active handler
|
32
|
438 */
|
|
439
|
|
440 revents |= POLLIN|POLLOUT;
|
0
|
441 }
|
|
442
|
|
443 rev = c->read;
|
|
444
|
32
|
445 if ((revents & POLLIN) && rev->active) {
|
0
|
446
|
112
|
447 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
448 rev->posted_ready = 1;
|
0
|
449
|
112
|
450 } else {
|
|
451 rev->ready = 1;
|
|
452 }
|
0
|
453
|
112
|
454 if (flags & NGX_POST_EVENTS) {
|
|
455 queue = (ngx_event_t **) (rev->accept ?
|
|
456 &ngx_posted_accept_events : &ngx_posted_events);
|
0
|
457
|
112
|
458 ngx_locked_post_event(rev, queue);
|
0
|
459
|
112
|
460 } else {
|
|
461 rev->handler(rev);
|
|
462 }
|
|
463 }
|
|
464
|
|
465 wev = c->write;
|
|
466
|
|
467 if ((revents & POLLOUT) && wev->active) {
|
0
|
468
|
112
|
469 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
470 wev->posted_ready = 1;
|
0
|
471
|
112
|
472 } else {
|
|
473 wev->ready = 1;
|
|
474 }
|
|
475
|
|
476 if (flags & NGX_POST_EVENTS) {
|
|
477 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
478
|
|
479 } else {
|
|
480 wev->handler(wev);
|
0
|
481 }
|
|
482 }
|
|
483 }
|
|
484
|
112
|
485 ngx_mutex_unlock(ngx_posted_events_mutex);
|
0
|
486
|
|
487 return NGX_OK;
|
|
488 }
|
|
489
|
|
490
|
48
|
491 static void *
|
|
492 ngx_devpoll_create_conf(ngx_cycle_t *cycle)
|
0
|
493 {
|
|
494 ngx_devpoll_conf_t *dpcf;
|
|
495
|
50
|
496 dpcf = ngx_palloc(cycle->pool, sizeof(ngx_devpoll_conf_t));
|
|
497 if (dpcf == NULL) {
|
|
498 return NGX_CONF_ERROR;
|
|
499 }
|
0
|
500
|
|
501 dpcf->changes = NGX_CONF_UNSET;
|
|
502 dpcf->events = NGX_CONF_UNSET;
|
|
503
|
|
504 return dpcf;
|
|
505 }
|
|
506
|
|
507
|
48
|
508 static char *
|
|
509 ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf)
|
0
|
510 {
|
|
511 ngx_devpoll_conf_t *dpcf = conf;
|
|
512
|
212
|
513 ngx_conf_init_uint_value(dpcf->changes, 32);
|
|
514 ngx_conf_init_uint_value(dpcf->events, 32);
|
0
|
515
|
|
516 return NGX_CONF_OK;
|
|
517 }
|