|
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
|
|
92
|
12 /* the buffer size is enough to hold "struct sockaddr_un" */
|
|
|
13 #define NGX_SOCKLEN 512
|
|
|
14
|
|
|
15
|
|
122
|
16 static ngx_int_t ngx_enable_accept_events(ngx_cycle_t *cycle);
|
|
|
17 static ngx_int_t ngx_disable_accept_events(ngx_cycle_t *cycle);
|
|
92
|
18 static void ngx_close_accepted_connection(ngx_connection_t *c);
|
|
0
|
19
|
|
|
20
|
|
42
|
21 void
|
|
|
22 ngx_event_accept(ngx_event_t *ev)
|
|
0
|
23 {
|
|
92
|
24 socklen_t sl;
|
|
32
|
25 ngx_err_t err;
|
|
|
26 ngx_log_t *log;
|
|
|
27 ngx_socket_t s;
|
|
|
28 ngx_event_t *rev, *wev;
|
|
92
|
29 ngx_listening_t *ls;
|
|
|
30 ngx_connection_t *c, *lc;
|
|
32
|
31 ngx_event_conf_t *ecf;
|
|
92
|
32 char sa[NGX_SOCKLEN];
|
|
0
|
33
|
|
|
34 ecf = ngx_event_get_conf(ngx_cycle->conf_ctx, ngx_event_core_module);
|
|
|
35
|
|
|
36 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
|
|
|
37 ev->available = 1;
|
|
|
38
|
|
4
|
39 } else if (!(ngx_event_flags & NGX_USE_KQUEUE_EVENT)) {
|
|
0
|
40 ev->available = ecf->multi_accept;
|
|
|
41 }
|
|
|
42
|
|
92
|
43 lc = ev->data;
|
|
|
44 ls = lc->listening;
|
|
|
45 ev->ready = 0;
|
|
0
|
46
|
|
|
47 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
92
|
48 "accept on %V, ready: %d", &ls->addr_text, ev->available);
|
|
0
|
49
|
|
|
50 do {
|
|
92
|
51 sl = NGX_SOCKLEN;
|
|
0
|
52
|
|
92
|
53 s = accept(lc->fd, (struct sockaddr *) sa, &sl);
|
|
26
|
54
|
|
0
|
55 if (s == -1) {
|
|
|
56 err = ngx_socket_errno;
|
|
|
57
|
|
|
58 if (err == NGX_EAGAIN) {
|
|
|
59 return;
|
|
|
60 }
|
|
|
61
|
|
58
|
62 ngx_log_error((err == NGX_ECONNABORTED) ? NGX_LOG_CRIT:
|
|
|
63 NGX_LOG_ALERT,
|
|
92
|
64 ev->log, err, "accept() failed");
|
|
0
|
65
|
|
|
66 if (err == NGX_ECONNABORTED) {
|
|
4
|
67 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
|
0
|
68 ev->available--;
|
|
|
69 }
|
|
|
70
|
|
|
71 if (ev->available) {
|
|
|
72 continue;
|
|
|
73 }
|
|
|
74 }
|
|
|
75
|
|
|
76 return;
|
|
|
77 }
|
|
|
78
|
|
|
79 #if (NGX_STAT_STUB)
|
|
110
|
80 ngx_atomic_fetch_add(ngx_stat_accepted, 1);
|
|
|
81 ngx_atomic_fetch_add(ngx_stat_active, 1);
|
|
0
|
82 #endif
|
|
|
83
|
|
92
|
84 ngx_accept_disabled = NGX_ACCEPT_THRESHOLD
|
|
|
85 - ngx_cycle->free_connection_n;
|
|
|
86
|
|
|
87 c = ngx_get_connection(s, ev->log);
|
|
0
|
88
|
|
92
|
89 if (c == NULL) {
|
|
|
90 if (ngx_close_socket(s) == -1) {
|
|
|
91 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
|
|
|
92 ngx_close_socket_n " failed");
|
|
|
93 }
|
|
0
|
94
|
|
92
|
95 return;
|
|
|
96 }
|
|
|
97
|
|
|
98 c->pool = ngx_create_pool(ls->pool_size, ev->log);
|
|
|
99 if (c->pool == NULL) {
|
|
|
100 ngx_close_accepted_connection(c);
|
|
|
101 return;
|
|
|
102 }
|
|
0
|
103
|
|
92
|
104 c->sockaddr = ngx_palloc(c->pool, sl);
|
|
|
105 if (c->sockaddr == NULL) {
|
|
|
106 ngx_close_accepted_connection(c);
|
|
|
107 return;
|
|
|
108 }
|
|
|
109
|
|
|
110 ngx_memcpy(c->sockaddr, sa, sl);
|
|
|
111
|
|
|
112 log = ngx_palloc(c->pool, sizeof(ngx_log_t));
|
|
|
113 if (log == NULL) {
|
|
|
114 ngx_close_accepted_connection(c);
|
|
0
|
115 return;
|
|
|
116 }
|
|
|
117
|
|
36
|
118 /* set a blocking mode for aio and non-blocking mode for others */
|
|
0
|
119
|
|
|
120 if (ngx_inherited_nonblocking) {
|
|
92
|
121 if (ngx_event_flags & NGX_USE_AIO_EVENT) {
|
|
0
|
122 if (ngx_blocking(s) == -1) {
|
|
92
|
123 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
|
|
0
|
124 ngx_blocking_n " failed");
|
|
92
|
125 ngx_close_accepted_connection(c);
|
|
0
|
126 return;
|
|
|
127 }
|
|
|
128 }
|
|
|
129
|
|
|
130 } else {
|
|
|
131 if (!(ngx_event_flags & (NGX_USE_AIO_EVENT|NGX_USE_RTSIG_EVENT))) {
|
|
|
132 if (ngx_nonblocking(s) == -1) {
|
|
92
|
133 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno,
|
|
0
|
134 ngx_nonblocking_n " failed");
|
|
92
|
135 ngx_close_accepted_connection(c);
|
|
0
|
136 return;
|
|
|
137 }
|
|
|
138 }
|
|
|
139 }
|
|
|
140
|
|
92
|
141 *log = ls->log;
|
|
|
142
|
|
|
143 c->recv = ngx_recv;
|
|
|
144 c->send = ngx_send;
|
|
126
|
145 c->recv_chain = ngx_recv_chain;
|
|
92
|
146 c->send_chain = ngx_send_chain;
|
|
0
|
147
|
|
92
|
148 c->log = log;
|
|
|
149 c->pool->log = log;
|
|
0
|
150
|
|
92
|
151 c->listening = ls;
|
|
|
152 c->socklen = sl;
|
|
|
153
|
|
|
154 c->unexpected_eof = 1;
|
|
|
155
|
|
|
156 c->ctx = lc->ctx;
|
|
|
157 c->servers = lc->servers;
|
|
0
|
158
|
|
110
|
159 rev = c->read;
|
|
|
160 wev = c->write;
|
|
0
|
161
|
|
|
162 wev->ready = 1;
|
|
|
163
|
|
|
164 if (ngx_event_flags & (NGX_USE_AIO_EVENT|NGX_USE_RTSIG_EVENT)) {
|
|
42
|
165 /* rtsig, aio, iocp */
|
|
0
|
166 rev->ready = 1;
|
|
|
167 }
|
|
|
168
|
|
|
169 if (ev->deferred_accept) {
|
|
|
170 rev->ready = 1;
|
|
72
|
171 #if (NGX_HAVE_KQUEUE)
|
|
|
172 rev->available = 1;
|
|
|
173 #endif
|
|
0
|
174 }
|
|
|
175
|
|
|
176 rev->log = log;
|
|
|
177 wev->log = log;
|
|
|
178
|
|
|
179 /*
|
|
110
|
180 * TODO: MT: - ngx_atomic_fetch_add()
|
|
0
|
181 * or protection by critical section or light mutex
|
|
|
182 *
|
|
|
183 * TODO: MP: - allocated in a shared memory
|
|
110
|
184 * - ngx_atomic_fetch_add()
|
|
0
|
185 * or protection by critical section or light mutex
|
|
|
186 */
|
|
|
187
|
|
110
|
188 c->number = ngx_atomic_fetch_add(ngx_connection_counter, 1);
|
|
0
|
189
|
|
44
|
190 #if (NGX_STAT_STUB)
|
|
110
|
191 ngx_atomic_fetch_add(ngx_stat_handled, 1);
|
|
44
|
192 #endif
|
|
|
193
|
|
0
|
194 #if (NGX_THREADS)
|
|
|
195 rev->lock = &c->lock;
|
|
|
196 wev->lock = &c->lock;
|
|
|
197 rev->own_lock = &c->lock;
|
|
|
198 wev->own_lock = &c->lock;
|
|
|
199 #endif
|
|
|
200
|
|
92
|
201 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, log, 0,
|
|
0
|
202 "accept: fd:%d c:%d", s, c->number);
|
|
|
203
|
|
92
|
204 if (ls->addr_ntop) {
|
|
|
205 c->addr_text.data = ngx_palloc(c->pool, ls->addr_text_max_len);
|
|
0
|
206 if (c->addr_text.data == NULL) {
|
|
92
|
207 ngx_close_accepted_connection(c);
|
|
0
|
208 return;
|
|
|
209 }
|
|
126
|
210
|
|
92
|
211 c->addr_text.len = ngx_sock_ntop(ls->family, c->sockaddr,
|
|
0
|
212 c->addr_text.data,
|
|
92
|
213 ls->addr_text_max_len);
|
|
0
|
214 if (c->addr_text.len == 0) {
|
|
92
|
215 ngx_close_accepted_connection(c);
|
|
0
|
216 return;
|
|
|
217 }
|
|
|
218 }
|
|
|
219
|
|
|
220 #if (NGX_DEBUG)
|
|
|
221 {
|
|
|
222
|
|
|
223 uint32_t *addr;
|
|
|
224 in_addr_t i;
|
|
28
|
225 struct sockaddr_in *sin;
|
|
0
|
226
|
|
28
|
227 sin = (struct sockaddr_in *) sa;
|
|
0
|
228 addr = ecf->debug_connection.elts;
|
|
|
229 for (i = 0; i < ecf->debug_connection.nelts; i++) {
|
|
28
|
230 if (addr[i] == sin->sin_addr.s_addr) {
|
|
0
|
231 log->log_level = NGX_LOG_DEBUG_CONNECTION|NGX_LOG_DEBUG_ALL;
|
|
|
232 break;
|
|
|
233 }
|
|
|
234 }
|
|
|
235
|
|
|
236 }
|
|
|
237 #endif
|
|
|
238
|
|
|
239 if (ngx_add_conn && (ngx_event_flags & NGX_USE_EPOLL_EVENT) == 0) {
|
|
|
240 if (ngx_add_conn(c) == NGX_ERROR) {
|
|
92
|
241 ngx_close_accepted_connection(c);
|
|
0
|
242 return;
|
|
|
243 }
|
|
|
244 }
|
|
|
245
|
|
|
246 log->data = NULL;
|
|
|
247 log->handler = NULL;
|
|
|
248
|
|
92
|
249 ls->handler(c);
|
|
0
|
250
|
|
4
|
251 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
|
|
0
|
252 ev->available--;
|
|
|
253 }
|
|
|
254
|
|
|
255 } while (ev->available);
|
|
|
256 }
|
|
|
257
|
|
|
258
|
|
42
|
259 ngx_int_t
|
|
|
260 ngx_trylock_accept_mutex(ngx_cycle_t *cycle)
|
|
0
|
261 {
|
|
|
262 if (*ngx_accept_mutex == 0
|
|
|
263 && ngx_atomic_cmp_set(ngx_accept_mutex, 0, ngx_pid))
|
|
|
264 {
|
|
|
265 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
266 "accept mutex locked");
|
|
|
267
|
|
122
|
268 if (ngx_accept_mutex_held
|
|
|
269 && (!(ngx_event_flags & NGX_USE_RTSIG_EVENT)
|
|
|
270 || *ngx_accept_mutex_last_owner == (ngx_atomic_t) ngx_pid))
|
|
|
271 {
|
|
|
272 return NGX_OK;
|
|
|
273 }
|
|
0
|
274
|
|
122
|
275 if (ngx_enable_accept_events(cycle) == NGX_ERROR) {
|
|
|
276 *ngx_accept_mutex = 0;
|
|
|
277 return NGX_ERROR;
|
|
0
|
278 }
|
|
|
279
|
|
122
|
280 ngx_accept_mutex_held = 1;
|
|
|
281
|
|
0
|
282 return NGX_OK;
|
|
|
283 }
|
|
|
284
|
|
|
285 if (ngx_accept_mutex_held) {
|
|
|
286 if (ngx_disable_accept_events(cycle) == NGX_ERROR) {
|
|
|
287 return NGX_ERROR;
|
|
|
288 }
|
|
|
289
|
|
|
290 ngx_accept_mutex_held = 0;
|
|
|
291 }
|
|
|
292
|
|
|
293 return NGX_OK;
|
|
|
294 }
|
|
|
295
|
|
|
296
|
|
122
|
297 static ngx_int_t
|
|
42
|
298 ngx_enable_accept_events(ngx_cycle_t *cycle)
|
|
0
|
299 {
|
|
92
|
300 ngx_uint_t i;
|
|
|
301 ngx_listening_t *ls;
|
|
|
302 ngx_connection_t *c;
|
|
0
|
303
|
|
92
|
304 ls = cycle->listening.elts;
|
|
0
|
305 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
|
306
|
|
92
|
307 c = ls[i].connection;
|
|
0
|
308
|
|
|
309 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
|
|
122
|
310
|
|
|
311 if (ngx_accept_mutex_held) {
|
|
|
312 c->read->disabled = 1;
|
|
|
313 }
|
|
|
314
|
|
92
|
315 if (ngx_add_conn(c) == NGX_ERROR) {
|
|
0
|
316 return NGX_ERROR;
|
|
|
317 }
|
|
|
318
|
|
122
|
319 *ngx_accept_mutex_last_owner = ngx_pid;
|
|
|
320
|
|
0
|
321 } else {
|
|
92
|
322 if (ngx_add_event(c->read, NGX_READ_EVENT, 0) == NGX_ERROR) {
|
|
0
|
323 return NGX_ERROR;
|
|
|
324 }
|
|
|
325 }
|
|
|
326 }
|
|
|
327
|
|
|
328 return NGX_OK;
|
|
|
329 }
|
|
|
330
|
|
|
331
|
|
122
|
332 static ngx_int_t
|
|
42
|
333 ngx_disable_accept_events(ngx_cycle_t *cycle)
|
|
0
|
334 {
|
|
92
|
335 ngx_uint_t i;
|
|
|
336 ngx_listening_t *ls;
|
|
|
337 ngx_connection_t *c;
|
|
0
|
338
|
|
92
|
339 ls = cycle->listening.elts;
|
|
0
|
340 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
|
341
|
|
92
|
342 c = ls[i].connection;
|
|
|
343
|
|
|
344 if (!c->read->active) {
|
|
|
345 continue;
|
|
|
346 }
|
|
0
|
347
|
|
|
348 if (ngx_event_flags & NGX_USE_RTSIG_EVENT) {
|
|
92
|
349 if (ngx_del_conn(c, NGX_DISABLE_EVENT) == NGX_ERROR) {
|
|
0
|
350 return NGX_ERROR;
|
|
|
351 }
|
|
|
352
|
|
|
353 } else {
|
|
92
|
354 if (ngx_del_event(c->read, NGX_READ_EVENT, NGX_DISABLE_EVENT)
|
|
|
355 == NGX_ERROR)
|
|
0
|
356 {
|
|
|
357 return NGX_ERROR;
|
|
|
358 }
|
|
|
359 }
|
|
|
360 }
|
|
|
361
|
|
|
362 return NGX_OK;
|
|
|
363 }
|
|
|
364
|
|
|
365
|
|
42
|
366 static void
|
|
92
|
367 ngx_close_accepted_connection(ngx_connection_t *c)
|
|
0
|
368 {
|
|
92
|
369 ngx_socket_t fd;
|
|
|
370
|
|
|
371 ngx_free_connection(c);
|
|
|
372
|
|
|
373 fd = c->fd;
|
|
|
374 c->fd = (ngx_socket_t) -1;
|
|
|
375
|
|
|
376 if (ngx_close_socket(fd) == -1) {
|
|
|
377 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno,
|
|
0
|
378 ngx_close_socket_n " failed");
|
|
|
379 }
|
|
44
|
380
|
|
92
|
381 if (c->pool) {
|
|
|
382 ngx_destroy_pool(c->pool);
|
|
|
383 }
|
|
|
384
|
|
44
|
385 #if (NGX_STAT_STUB)
|
|
110
|
386 ngx_atomic_fetch_add(ngx_stat_active, -1);
|
|
44
|
387 #endif
|
|
0
|
388 }
|
|
|
389
|
|
|
390
|
|
92
|
391 u_char *
|
|
42
|
392 ngx_accept_log_error(ngx_log_t *log, u_char *buf, size_t len)
|
|
0
|
393 {
|
|
92
|
394 return ngx_snprintf(buf, len, " while accepting new connection on %V",
|
|
|
395 log->data);
|
|
0
|
396 }
|
