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