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