0
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
660
|
4 * Copyright (C) Nginx, Inc.
|
0
|
5 */
|
|
6
|
|
7
|
|
8 #include <ngx_config.h>
|
|
9 #include <ngx_core.h>
|
|
10 #include <ngx_event.h>
|
|
11
|
|
12
|
18
|
13 #if (NGX_TEST_BUILD_EPOLL)
|
0
|
14
|
|
15 /* epoll declarations */
|
|
16
|
|
17 #define EPOLLIN 0x001
|
|
18 #define EPOLLPRI 0x002
|
|
19 #define EPOLLOUT 0x004
|
|
20 #define EPOLLRDNORM 0x040
|
|
21 #define EPOLLRDBAND 0x080
|
|
22 #define EPOLLWRNORM 0x100
|
|
23 #define EPOLLWRBAND 0x200
|
|
24 #define EPOLLMSG 0x400
|
|
25 #define EPOLLERR 0x008
|
|
26 #define EPOLLHUP 0x010
|
|
27
|
|
28 #define EPOLLET 0x80000000
|
|
29 #define EPOLLONESHOT 0x40000000
|
|
30
|
|
31 #define EPOLL_CTL_ADD 1
|
|
32 #define EPOLL_CTL_DEL 2
|
|
33 #define EPOLL_CTL_MOD 3
|
|
34
|
|
35 typedef union epoll_data {
|
|
36 void *ptr;
|
|
37 int fd;
|
|
38 uint32_t u32;
|
|
39 uint64_t u64;
|
|
40 } epoll_data_t;
|
|
41
|
|
42 struct epoll_event {
|
|
43 uint32_t events;
|
|
44 epoll_data_t data;
|
|
45 };
|
|
46
|
682
|
47
|
|
48 int epoll_create(int size);
|
|
49
|
0
|
50 int epoll_create(int size)
|
|
51 {
|
|
52 return -1;
|
|
53 }
|
|
54
|
682
|
55
|
|
56 int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event);
|
|
57
|
0
|
58 int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
|
|
59 {
|
|
60 return -1;
|
|
61 }
|
|
62
|
682
|
63
|
|
64 int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout);
|
|
65
|
0
|
66 int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout)
|
|
67 {
|
|
68 return -1;
|
|
69 }
|
|
70
|
518
|
71 #if (NGX_HAVE_FILE_AIO)
|
|
72
|
|
73 #define SYS_io_setup 245
|
|
74 #define SYS_io_destroy 246
|
|
75 #define SYS_io_getevents 247
|
|
76 #define SYS_eventfd 323
|
|
77
|
|
78 typedef u_int aio_context_t;
|
|
79
|
|
80 struct io_event {
|
|
81 uint64_t data; /* the data field from the iocb */
|
|
82 uint64_t obj; /* what iocb this event came from */
|
|
83 int64_t res; /* result code for this event */
|
|
84 int64_t res2; /* secondary result */
|
|
85 };
|
|
86
|
|
87
|
|
88 #endif
|
0
|
89 #endif
|
|
90
|
|
91
|
|
92 typedef struct {
|
324
|
93 ngx_uint_t events;
|
640
|
94 ngx_uint_t aio_requests;
|
0
|
95 } ngx_epoll_conf_t;
|
|
96
|
|
97
|
112
|
98 static ngx_int_t ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer);
|
0
|
99 static void ngx_epoll_done(ngx_cycle_t *cycle);
|
324
|
100 static ngx_int_t ngx_epoll_add_event(ngx_event_t *ev, ngx_int_t event,
|
|
101 ngx_uint_t flags);
|
|
102 static ngx_int_t ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event,
|
|
103 ngx_uint_t flags);
|
48
|
104 static ngx_int_t ngx_epoll_add_connection(ngx_connection_t *c);
|
324
|
105 static ngx_int_t ngx_epoll_del_connection(ngx_connection_t *c,
|
|
106 ngx_uint_t flags);
|
112
|
107 static ngx_int_t ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
|
|
108 ngx_uint_t flags);
|
0
|
109
|
518
|
110 #if (NGX_HAVE_FILE_AIO)
|
|
111 static void ngx_epoll_eventfd_handler(ngx_event_t *ev);
|
|
112 #endif
|
|
113
|
0
|
114 static void *ngx_epoll_create_conf(ngx_cycle_t *cycle);
|
|
115 static char *ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf);
|
|
116
|
|
117 static int ep = -1;
|
|
118 static struct epoll_event *event_list;
|
324
|
119 static ngx_uint_t nevents;
|
0
|
120
|
518
|
121 #if (NGX_HAVE_FILE_AIO)
|
|
122
|
|
123 int ngx_eventfd = -1;
|
|
124 aio_context_t ngx_aio_ctx = 0;
|
|
125
|
|
126 static ngx_event_t ngx_eventfd_event;
|
|
127 static ngx_connection_t ngx_eventfd_conn;
|
|
128
|
|
129 #endif
|
0
|
130
|
|
131 static ngx_str_t epoll_name = ngx_string("epoll");
|
|
132
|
|
133 static ngx_command_t ngx_epoll_commands[] = {
|
|
134
|
48
|
135 { ngx_string("epoll_events"),
|
|
136 NGX_EVENT_CONF|NGX_CONF_TAKE1,
|
|
137 ngx_conf_set_num_slot,
|
|
138 0,
|
|
139 offsetof(ngx_epoll_conf_t, events),
|
|
140 NULL },
|
0
|
141
|
640
|
142 { ngx_string("worker_aio_requests"),
|
|
143 NGX_EVENT_CONF|NGX_CONF_TAKE1,
|
|
144 ngx_conf_set_num_slot,
|
|
145 0,
|
|
146 offsetof(ngx_epoll_conf_t, aio_requests),
|
|
147 NULL },
|
|
148
|
48
|
149 ngx_null_command
|
0
|
150 };
|
|
151
|
|
152
|
|
153 ngx_event_module_t ngx_epoll_module_ctx = {
|
|
154 &epoll_name,
|
|
155 ngx_epoll_create_conf, /* create configuration */
|
|
156 ngx_epoll_init_conf, /* init configuration */
|
|
157
|
|
158 {
|
|
159 ngx_epoll_add_event, /* add an event */
|
|
160 ngx_epoll_del_event, /* delete an event */
|
|
161 ngx_epoll_add_event, /* enable an event */
|
|
162 ngx_epoll_del_event, /* disable an event */
|
|
163 ngx_epoll_add_connection, /* add an connection */
|
|
164 ngx_epoll_del_connection, /* delete an connection */
|
|
165 NULL, /* process the changes */
|
|
166 ngx_epoll_process_events, /* process the events */
|
|
167 ngx_epoll_init, /* init the events */
|
|
168 ngx_epoll_done, /* done the events */
|
|
169 }
|
|
170 };
|
|
171
|
|
172 ngx_module_t ngx_epoll_module = {
|
58
|
173 NGX_MODULE_V1,
|
0
|
174 &ngx_epoll_module_ctx, /* module context */
|
|
175 ngx_epoll_commands, /* module directives */
|
|
176 NGX_EVENT_MODULE, /* module type */
|
90
|
177 NULL, /* init master */
|
0
|
178 NULL, /* init module */
|
90
|
179 NULL, /* init process */
|
|
180 NULL, /* init thread */
|
|
181 NULL, /* exit thread */
|
|
182 NULL, /* exit process */
|
|
183 NULL, /* exit master */
|
|
184 NGX_MODULE_V1_PADDING
|
0
|
185 };
|
|
186
|
|
187
|
518
|
188 #if (NGX_HAVE_FILE_AIO)
|
|
189
|
|
190 /*
|
|
191 * We call io_setup(), io_destroy() io_submit(), and io_getevents() directly
|
|
192 * as syscalls instead of libaio usage, because the library header file
|
|
193 * supports eventfd() since 0.3.107 version only.
|
|
194 *
|
|
195 * Also we do not use eventfd() in glibc, because glibc supports it
|
|
196 * since 2.8 version and glibc maps two syscalls eventfd() and eventfd2()
|
|
197 * into single eventfd() function with different number of parameters.
|
|
198 */
|
|
199
|
640
|
200 static int
|
518
|
201 io_setup(u_int nr_reqs, aio_context_t *ctx)
|
|
202 {
|
|
203 return syscall(SYS_io_setup, nr_reqs, ctx);
|
|
204 }
|
|
205
|
|
206
|
|
207 static int
|
|
208 io_destroy(aio_context_t ctx)
|
|
209 {
|
|
210 return syscall(SYS_io_destroy, ctx);
|
|
211 }
|
|
212
|
|
213
|
640
|
214 static int
|
518
|
215 io_getevents(aio_context_t ctx, long min_nr, long nr, struct io_event *events,
|
|
216 struct timespec *tmo)
|
|
217 {
|
|
218 return syscall(SYS_io_getevents, ctx, min_nr, nr, events, tmo);
|
|
219 }
|
|
220
|
640
|
221
|
|
222 static void
|
|
223 ngx_epoll_aio_init(ngx_cycle_t *cycle, ngx_epoll_conf_t *epcf)
|
|
224 {
|
|
225 int n;
|
|
226 struct epoll_event ee;
|
|
227
|
|
228 ngx_eventfd = syscall(SYS_eventfd, 0);
|
|
229
|
|
230 if (ngx_eventfd == -1) {
|
|
231 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
232 "eventfd() failed");
|
|
233 ngx_file_aio = 0;
|
|
234 return;
|
|
235 }
|
|
236
|
|
237 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
238 "eventfd: %d", ngx_eventfd);
|
|
239
|
|
240 n = 1;
|
|
241
|
|
242 if (ioctl(ngx_eventfd, FIONBIO, &n) == -1) {
|
|
243 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
244 "ioctl(eventfd, FIONBIO) failed");
|
|
245 goto failed;
|
|
246 }
|
|
247
|
|
248 if (io_setup(epcf->aio_requests, &ngx_aio_ctx) == -1) {
|
|
249 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
250 "io_setup() failed");
|
|
251 goto failed;
|
|
252 }
|
|
253
|
|
254 ngx_eventfd_event.data = &ngx_eventfd_conn;
|
|
255 ngx_eventfd_event.handler = ngx_epoll_eventfd_handler;
|
|
256 ngx_eventfd_event.log = cycle->log;
|
|
257 ngx_eventfd_event.active = 1;
|
|
258 ngx_eventfd_conn.fd = ngx_eventfd;
|
|
259 ngx_eventfd_conn.read = &ngx_eventfd_event;
|
|
260 ngx_eventfd_conn.log = cycle->log;
|
|
261
|
|
262 ee.events = EPOLLIN|EPOLLET;
|
|
263 ee.data.ptr = &ngx_eventfd_conn;
|
|
264
|
|
265 if (epoll_ctl(ep, EPOLL_CTL_ADD, ngx_eventfd, &ee) != -1) {
|
|
266 return;
|
|
267 }
|
|
268
|
|
269 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
270 "epoll_ctl(EPOLL_CTL_ADD, eventfd) failed");
|
|
271
|
|
272 if (io_destroy(ngx_aio_ctx) == -1) {
|
|
273 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
274 "io_destroy() failed");
|
|
275 }
|
|
276
|
|
277 failed:
|
|
278
|
|
279 if (close(ngx_eventfd) == -1) {
|
|
280 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
281 "eventfd close() failed");
|
|
282 }
|
|
283
|
|
284 ngx_eventfd = -1;
|
|
285 ngx_aio_ctx = 0;
|
|
286 ngx_file_aio = 0;
|
|
287 }
|
|
288
|
518
|
289 #endif
|
|
290
|
|
291
|
48
|
292 static ngx_int_t
|
112
|
293 ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
|
0
|
294 {
|
|
295 ngx_epoll_conf_t *epcf;
|
|
296
|
|
297 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_epoll_module);
|
|
298
|
|
299 if (ep == -1) {
|
384
|
300 ep = epoll_create(cycle->connection_n / 2);
|
0
|
301
|
|
302 if (ep == -1) {
|
|
303 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
304 "epoll_create() failed");
|
|
305 return NGX_ERROR;
|
|
306 }
|
518
|
307
|
|
308 #if (NGX_HAVE_FILE_AIO)
|
|
309
|
640
|
310 ngx_epoll_aio_init(cycle, epcf);
|
518
|
311
|
|
312 #endif
|
0
|
313 }
|
|
314
|
|
315 if (nevents < epcf->events) {
|
|
316 if (event_list) {
|
|
317 ngx_free(event_list);
|
|
318 }
|
|
319
|
|
320 event_list = ngx_alloc(sizeof(struct epoll_event) * epcf->events,
|
|
321 cycle->log);
|
|
322 if (event_list == NULL) {
|
|
323 return NGX_ERROR;
|
|
324 }
|
|
325 }
|
|
326
|
|
327 nevents = epcf->events;
|
|
328
|
|
329 ngx_io = ngx_os_io;
|
|
330
|
|
331 ngx_event_actions = ngx_epoll_module_ctx.actions;
|
|
332
|
18
|
333 #if (NGX_HAVE_CLEAR_EVENT)
|
0
|
334 ngx_event_flags = NGX_USE_CLEAR_EVENT
|
|
335 #else
|
|
336 ngx_event_flags = NGX_USE_LEVEL_EVENT
|
|
337 #endif
|
4
|
338 |NGX_USE_GREEDY_EVENT
|
0
|
339 |NGX_USE_EPOLL_EVENT;
|
|
340
|
|
341 return NGX_OK;
|
|
342 }
|
|
343
|
|
344
|
48
|
345 static void
|
|
346 ngx_epoll_done(ngx_cycle_t *cycle)
|
0
|
347 {
|
|
348 if (close(ep) == -1) {
|
|
349 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
350 "epoll close() failed");
|
|
351 }
|
|
352
|
|
353 ep = -1;
|
|
354
|
518
|
355 #if (NGX_HAVE_FILE_AIO)
|
|
356
|
640
|
357 if (ngx_eventfd != -1) {
|
|
358
|
|
359 if (io_destroy(ngx_aio_ctx) == -1) {
|
|
360 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
361 "io_destroy() failed");
|
|
362 }
|
|
363
|
|
364 if (close(ngx_eventfd) == -1) {
|
|
365 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
366 "eventfd close() failed");
|
|
367 }
|
|
368
|
|
369 ngx_eventfd = -1;
|
518
|
370 }
|
|
371
|
|
372 ngx_aio_ctx = 0;
|
|
373
|
|
374 #endif
|
|
375
|
0
|
376 ngx_free(event_list);
|
|
377
|
|
378 event_list = NULL;
|
|
379 nevents = 0;
|
|
380 }
|
|
381
|
|
382
|
48
|
383 static ngx_int_t
|
324
|
384 ngx_epoll_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
|
0
|
385 {
|
32
|
386 int op;
|
|
387 uint32_t events, prev;
|
0
|
388 ngx_event_t *e;
|
|
389 ngx_connection_t *c;
|
|
390 struct epoll_event ee;
|
|
391
|
|
392 c = ev->data;
|
|
393
|
32
|
394 events = (uint32_t) event;
|
|
395
|
0
|
396 if (event == NGX_READ_EVENT) {
|
|
397 e = c->write;
|
|
398 prev = EPOLLOUT;
|
|
399 #if (NGX_READ_EVENT != EPOLLIN)
|
32
|
400 events = EPOLLIN;
|
0
|
401 #endif
|
|
402
|
|
403 } else {
|
|
404 e = c->read;
|
|
405 prev = EPOLLIN;
|
|
406 #if (NGX_WRITE_EVENT != EPOLLOUT)
|
32
|
407 events = EPOLLOUT;
|
0
|
408 #endif
|
|
409 }
|
|
410
|
|
411 if (e->active) {
|
|
412 op = EPOLL_CTL_MOD;
|
32
|
413 events |= prev;
|
0
|
414
|
|
415 } else {
|
|
416 op = EPOLL_CTL_ADD;
|
|
417 }
|
|
418
|
324
|
419 ee.events = events | (uint32_t) flags;
|
130
|
420 ee.data.ptr = (void *) ((uintptr_t) c | ev->instance);
|
0
|
421
|
|
422 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
10
|
423 "epoll add event: fd:%d op:%d ev:%08XD",
|
0
|
424 c->fd, op, ee.events);
|
|
425
|
|
426 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
427 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
428 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
429 return NGX_ERROR;
|
|
430 }
|
|
431
|
|
432 ev->active = 1;
|
|
433 #if 0
|
|
434 ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0;
|
|
435 #endif
|
|
436
|
|
437 return NGX_OK;
|
|
438 }
|
|
439
|
|
440
|
48
|
441 static ngx_int_t
|
324
|
442 ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
|
0
|
443 {
|
32
|
444 int op;
|
|
445 uint32_t prev;
|
0
|
446 ngx_event_t *e;
|
|
447 ngx_connection_t *c;
|
|
448 struct epoll_event ee;
|
|
449
|
|
450 /*
|
32
|
451 * when the file descriptor is closed, the epoll automatically deletes
|
670
|
452 * it from its queue, so we do not need to delete explicitly the event
|
0
|
453 * before the closing the file descriptor
|
|
454 */
|
|
455
|
|
456 if (flags & NGX_CLOSE_EVENT) {
|
|
457 ev->active = 0;
|
|
458 return NGX_OK;
|
|
459 }
|
|
460
|
|
461 c = ev->data;
|
|
462
|
|
463 if (event == NGX_READ_EVENT) {
|
|
464 e = c->write;
|
|
465 prev = EPOLLOUT;
|
|
466
|
|
467 } else {
|
|
468 e = c->read;
|
|
469 prev = EPOLLIN;
|
|
470 }
|
|
471
|
|
472 if (e->active) {
|
|
473 op = EPOLL_CTL_MOD;
|
324
|
474 ee.events = prev | (uint32_t) flags;
|
130
|
475 ee.data.ptr = (void *) ((uintptr_t) c | ev->instance);
|
0
|
476
|
|
477 } else {
|
|
478 op = EPOLL_CTL_DEL;
|
|
479 ee.events = 0;
|
|
480 ee.data.ptr = NULL;
|
|
481 }
|
|
482
|
|
483 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
10
|
484 "epoll del event: fd:%d op:%d ev:%08XD",
|
0
|
485 c->fd, op, ee.events);
|
|
486
|
|
487 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
488 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
489 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
490 return NGX_ERROR;
|
|
491 }
|
|
492
|
|
493 ev->active = 0;
|
|
494
|
|
495 return NGX_OK;
|
|
496 }
|
|
497
|
|
498
|
48
|
499 static ngx_int_t
|
|
500 ngx_epoll_add_connection(ngx_connection_t *c)
|
0
|
501 {
|
|
502 struct epoll_event ee;
|
|
503
|
|
504 ee.events = EPOLLIN|EPOLLOUT|EPOLLET;
|
130
|
505 ee.data.ptr = (void *) ((uintptr_t) c | c->read->instance);
|
0
|
506
|
|
507 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
10
|
508 "epoll add connection: fd:%d ev:%08XD", c->fd, ee.events);
|
0
|
509
|
|
510 if (epoll_ctl(ep, EPOLL_CTL_ADD, c->fd, &ee) == -1) {
|
|
511 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
512 "epoll_ctl(EPOLL_CTL_ADD, %d) failed", c->fd);
|
|
513 return NGX_ERROR;
|
|
514 }
|
|
515
|
|
516 c->read->active = 1;
|
|
517 c->write->active = 1;
|
|
518
|
|
519 return NGX_OK;
|
|
520 }
|
|
521
|
|
522
|
48
|
523 static ngx_int_t
|
324
|
524 ngx_epoll_del_connection(ngx_connection_t *c, ngx_uint_t flags)
|
0
|
525 {
|
324
|
526 int op;
|
|
527 struct epoll_event ee;
|
0
|
528
|
|
529 /*
|
|
530 * when the file descriptor is closed the epoll automatically deletes
|
670
|
531 * it from its queue so we do not need to delete explicitly the event
|
0
|
532 * before the closing the file descriptor
|
|
533 */
|
|
534
|
|
535 if (flags & NGX_CLOSE_EVENT) {
|
|
536 c->read->active = 0;
|
|
537 c->write->active = 0;
|
|
538 return NGX_OK;
|
|
539 }
|
|
540
|
|
541 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
542 "epoll del connection: fd:%d", c->fd);
|
|
543
|
|
544 op = EPOLL_CTL_DEL;
|
|
545 ee.events = 0;
|
130
|
546 ee.data.ptr = NULL;
|
0
|
547
|
|
548 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
549 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
550 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
551 return NGX_ERROR;
|
|
552 }
|
|
553
|
|
554 c->read->active = 0;
|
|
555 c->write->active = 0;
|
|
556
|
|
557 return NGX_OK;
|
|
558 }
|
|
559
|
|
560
|
48
|
561 static ngx_int_t
|
112
|
562 ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags)
|
0
|
563 {
|
|
564 int events;
|
32
|
565 uint32_t revents;
|
0
|
566 ngx_int_t instance, i;
|
112
|
567 ngx_uint_t level;
|
0
|
568 ngx_err_t err;
|
112
|
569 ngx_event_t *rev, *wev, **queue;
|
0
|
570 ngx_connection_t *c;
|
|
571
|
|
572 /* NGX_TIMER_INFINITE == INFTIM */
|
|
573
|
|
574 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
106
|
575 "epoll timer: %M", timer);
|
0
|
576
|
324
|
577 events = epoll_wait(ep, event_list, (int) nevents, timer);
|
0
|
578
|
518
|
579 err = (events == -1) ? ngx_errno : 0;
|
0
|
580
|
566
|
581 if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
|
|
582 ngx_time_update();
|
112
|
583 }
|
0
|
584
|
|
585 if (err) {
|
112
|
586 if (err == NGX_EINTR) {
|
|
587
|
|
588 if (ngx_event_timer_alarm) {
|
|
589 ngx_event_timer_alarm = 0;
|
|
590 return NGX_OK;
|
|
591 }
|
126
|
592
|
112
|
593 level = NGX_LOG_INFO;
|
126
|
594
|
|
595 } else {
|
112
|
596 level = NGX_LOG_ALERT;
|
|
597 }
|
|
598
|
|
599 ngx_log_error(level, cycle->log, err, "epoll_wait() failed");
|
0
|
600 return NGX_ERROR;
|
|
601 }
|
|
602
|
112
|
603 if (events == 0) {
|
116
|
604 if (timer != NGX_TIMER_INFINITE) {
|
|
605 return NGX_OK;
|
|
606 }
|
|
607
|
|
608 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
609 "epoll_wait() returned no events without timeout");
|
|
610 return NGX_ERROR;
|
112
|
611 }
|
0
|
612
|
112
|
613 ngx_mutex_lock(ngx_posted_events_mutex);
|
0
|
614
|
|
615 for (i = 0; i < events; i++) {
|
|
616 c = event_list[i].data.ptr;
|
|
617
|
|
618 instance = (uintptr_t) c & 1;
|
|
619 c = (ngx_connection_t *) ((uintptr_t) c & (uintptr_t) ~1);
|
|
620
|
|
621 rev = c->read;
|
|
622
|
|
623 if (c->fd == -1 || rev->instance != instance) {
|
|
624
|
|
625 /*
|
|
626 * the stale event from a file descriptor
|
|
627 * that was just closed in this iteration
|
|
628 */
|
|
629
|
|
630 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
631 "epoll: stale event %p", c);
|
0
|
632 continue;
|
|
633 }
|
|
634
|
32
|
635 revents = event_list[i].events;
|
|
636
|
622
|
637 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
638 "epoll: fd:%d ev:%04XD d:%p",
|
126
|
639 c->fd, revents, event_list[i].data.ptr);
|
0
|
640
|
32
|
641 if (revents & (EPOLLERR|EPOLLHUP)) {
|
622
|
642 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
10
|
643 "epoll_wait() error on fd:%d ev:%04XD",
|
32
|
644 c->fd, revents);
|
|
645 }
|
|
646
|
212
|
647 #if 0
|
32
|
648 if (revents & ~(EPOLLIN|EPOLLOUT|EPOLLERR|EPOLLHUP)) {
|
622
|
649 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
32
|
650 "strange epoll_wait() events fd:%d ev:%04XD",
|
|
651 c->fd, revents);
|
0
|
652 }
|
212
|
653 #endif
|
0
|
654
|
32
|
655 if ((revents & (EPOLLERR|EPOLLHUP))
|
|
656 && (revents & (EPOLLIN|EPOLLOUT)) == 0)
|
|
657 {
|
|
658 /*
|
|
659 * if the error events were returned without EPOLLIN or EPOLLOUT,
|
|
660 * then add these flags to handle the events at least in one
|
|
661 * active handler
|
|
662 */
|
|
663
|
|
664 revents |= EPOLLIN|EPOLLOUT;
|
0
|
665 }
|
|
666
|
112
|
667 if ((revents & EPOLLIN) && rev->active) {
|
|
668
|
|
669 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
670 rev->posted_ready = 1;
|
|
671
|
|
672 } else {
|
|
673 rev->ready = 1;
|
|
674 }
|
|
675
|
|
676 if (flags & NGX_POST_EVENTS) {
|
|
677 queue = (ngx_event_t **) (rev->accept ?
|
|
678 &ngx_posted_accept_events : &ngx_posted_events);
|
|
679
|
|
680 ngx_locked_post_event(rev, queue);
|
|
681
|
|
682 } else {
|
|
683 rev->handler(rev);
|
|
684 }
|
|
685 }
|
|
686
|
0
|
687 wev = c->write;
|
|
688
|
652
|
689 if ((revents & EPOLLOUT) && wev->active) {
|
650
|
690
|
652
|
691 if (c->fd == -1 || wev->instance != instance) {
|
650
|
692
|
652
|
693 /*
|
|
694 * the stale event from a file descriptor
|
|
695 * that was just closed in this iteration
|
|
696 */
|
650
|
697
|
652
|
698 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
699 "epoll: stale event %p", c);
|
|
700 continue;
|
|
701 }
|
32
|
702
|
112
|
703 if (flags & NGX_POST_THREAD_EVENTS) {
|
0
|
704 wev->posted_ready = 1;
|
|
705
|
|
706 } else {
|
|
707 wev->ready = 1;
|
|
708 }
|
|
709
|
112
|
710 if (flags & NGX_POST_EVENTS) {
|
|
711 ngx_locked_post_event(wev, &ngx_posted_events);
|
0
|
712
|
112
|
713 } else {
|
|
714 wev->handler(wev);
|
0
|
715 }
|
|
716 }
|
|
717 }
|
|
718
|
112
|
719 ngx_mutex_unlock(ngx_posted_events_mutex);
|
0
|
720
|
|
721 return NGX_OK;
|
|
722 }
|
|
723
|
|
724
|
518
|
725 #if (NGX_HAVE_FILE_AIO)
|
|
726
|
|
727 static void
|
|
728 ngx_epoll_eventfd_handler(ngx_event_t *ev)
|
|
729 {
|
640
|
730 int n, events;
|
|
731 long i;
|
518
|
732 uint64_t ready;
|
|
733 ngx_err_t err;
|
|
734 ngx_event_t *e;
|
|
735 ngx_event_aio_t *aio;
|
|
736 struct io_event event[64];
|
|
737 struct timespec ts;
|
|
738
|
|
739 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd handler");
|
|
740
|
|
741 n = read(ngx_eventfd, &ready, 8);
|
|
742
|
|
743 err = ngx_errno;
|
|
744
|
|
745 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd: %d", n);
|
|
746
|
|
747 if (n != 8) {
|
|
748 if (n == -1) {
|
|
749 if (err == NGX_EAGAIN) {
|
|
750 return;
|
|
751 }
|
|
752
|
|
753 ngx_log_error(NGX_LOG_ALERT, ev->log, err, "read(eventfd) failed");
|
|
754 return;
|
|
755 }
|
|
756
|
|
757 ngx_log_error(NGX_LOG_ALERT, ev->log, 0,
|
|
758 "read(eventfd) returned only %d bytes", n);
|
|
759 return;
|
|
760 }
|
|
761
|
|
762 ts.tv_sec = 0;
|
|
763 ts.tv_nsec = 0;
|
|
764
|
|
765 while (ready) {
|
|
766
|
|
767 events = io_getevents(ngx_aio_ctx, 1, 64, event, &ts);
|
|
768
|
|
769 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
770 "io_getevents: %l", events);
|
|
771
|
|
772 if (events > 0) {
|
|
773 ready -= events;
|
|
774
|
|
775 for (i = 0; i < events; i++) {
|
|
776
|
|
777 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
778 "io_event: %uXL %uXL %L %L",
|
|
779 event[i].data, event[i].obj,
|
|
780 event[i].res, event[i].res2);
|
|
781
|
|
782 e = (ngx_event_t *) (uintptr_t) event[i].data;
|
|
783
|
|
784 e->complete = 1;
|
|
785 e->active = 0;
|
|
786 e->ready = 1;
|
|
787
|
|
788 aio = e->data;
|
|
789 aio->res = event[i].res;
|
|
790
|
|
791 ngx_post_event(e, &ngx_posted_events);
|
|
792 }
|
|
793
|
|
794 continue;
|
|
795 }
|
|
796
|
|
797 if (events == 0) {
|
|
798 return;
|
|
799 }
|
|
800
|
640
|
801 /* events == -1 */
|
|
802 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
803 "io_getevents() failed");
|
518
|
804 return;
|
|
805 }
|
|
806 }
|
|
807
|
|
808 #endif
|
|
809
|
|
810
|
48
|
811 static void *
|
|
812 ngx_epoll_create_conf(ngx_cycle_t *cycle)
|
0
|
813 {
|
|
814 ngx_epoll_conf_t *epcf;
|
|
815
|
50
|
816 epcf = ngx_palloc(cycle->pool, sizeof(ngx_epoll_conf_t));
|
|
817 if (epcf == NULL) {
|
496
|
818 return NULL;
|
50
|
819 }
|
0
|
820
|
|
821 epcf->events = NGX_CONF_UNSET;
|
640
|
822 epcf->aio_requests = NGX_CONF_UNSET;
|
0
|
823
|
|
824 return epcf;
|
|
825 }
|
|
826
|
|
827
|
48
|
828 static char *
|
|
829 ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf)
|
0
|
830 {
|
|
831 ngx_epoll_conf_t *epcf = conf;
|
|
832
|
212
|
833 ngx_conf_init_uint_value(epcf->events, 512);
|
640
|
834 ngx_conf_init_uint_value(epcf->aio_requests, 32);
|
0
|
835
|
|
836 return NGX_CONF_OK;
|
|
837 }
|