|
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 #include <ngx_channel.h>
|
|
|
11
|
|
|
12
|
|
|
13 static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n,
|
|
|
14 ngx_int_t type);
|
|
|
15 static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo);
|
|
|
16 static ngx_uint_t ngx_reap_childs(ngx_cycle_t *cycle);
|
|
2
|
17 static void ngx_master_exit(ngx_cycle_t *cycle);
|
|
0
|
18 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data);
|
|
|
19 static void ngx_channel_handler(ngx_event_t *ev);
|
|
|
20 #if (NGX_THREADS)
|
|
|
21 static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle);
|
|
|
22 static void *ngx_worker_thread_cycle(void *data);
|
|
|
23 #endif
|
|
|
24
|
|
|
25
|
|
|
26 ngx_uint_t ngx_process;
|
|
|
27 ngx_pid_t ngx_pid;
|
|
|
28 ngx_uint_t ngx_threaded;
|
|
|
29
|
|
|
30 sig_atomic_t ngx_reap;
|
|
|
31 sig_atomic_t ngx_timer;
|
|
|
32 sig_atomic_t ngx_sigio;
|
|
|
33 sig_atomic_t ngx_terminate;
|
|
|
34 sig_atomic_t ngx_quit;
|
|
|
35 ngx_uint_t ngx_exiting;
|
|
|
36 sig_atomic_t ngx_reconfigure;
|
|
|
37 sig_atomic_t ngx_reopen;
|
|
|
38
|
|
|
39 sig_atomic_t ngx_change_binary;
|
|
|
40 ngx_pid_t ngx_new_binary;
|
|
|
41 ngx_uint_t ngx_inherited;
|
|
|
42 ngx_uint_t ngx_daemonized;
|
|
|
43
|
|
|
44 sig_atomic_t ngx_noaccept;
|
|
|
45 ngx_uint_t ngx_noaccepting;
|
|
|
46 ngx_uint_t ngx_restart;
|
|
|
47
|
|
|
48
|
|
|
49 #if (NGX_THREADS)
|
|
|
50 volatile ngx_thread_t ngx_threads[NGX_MAX_THREADS];
|
|
|
51 ngx_int_t ngx_threads_n;
|
|
|
52 #endif
|
|
|
53
|
|
|
54
|
|
|
55 u_char master_process[] = "master process";
|
|
|
56
|
|
|
57
|
|
2
|
58 void ngx_master_process_cycle(ngx_cycle_t *cycle)
|
|
0
|
59 {
|
|
|
60 char *title;
|
|
|
61 u_char *p;
|
|
|
62 size_t size;
|
|
|
63 ngx_int_t i;
|
|
|
64 sigset_t set;
|
|
|
65 struct timeval tv;
|
|
|
66 struct itimerval itv;
|
|
|
67 ngx_uint_t live;
|
|
|
68 ngx_msec_t delay;
|
|
|
69 ngx_core_conf_t *ccf;
|
|
|
70
|
|
|
71 sigemptyset(&set);
|
|
|
72 sigaddset(&set, SIGCHLD);
|
|
|
73 sigaddset(&set, SIGALRM);
|
|
|
74 sigaddset(&set, SIGIO);
|
|
|
75 sigaddset(&set, SIGINT);
|
|
|
76 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
|
|
|
77 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
|
|
|
78 sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL));
|
|
|
79 sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL));
|
|
|
80 sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
|
|
|
81 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
|
|
|
82
|
|
|
83 if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) {
|
|
|
84 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
85 "sigprocmask() failed");
|
|
|
86 }
|
|
|
87
|
|
|
88 sigemptyset(&set);
|
|
|
89
|
|
|
90
|
|
|
91 size = sizeof(master_process);
|
|
|
92
|
|
2
|
93 for (i = 0; i < ngx_argc; i++) {
|
|
|
94 size += ngx_strlen(ngx_argv[i]) + 1;
|
|
0
|
95 }
|
|
|
96
|
|
|
97 title = ngx_palloc(cycle->pool, size);
|
|
|
98
|
|
|
99 p = ngx_cpymem(title, master_process, sizeof(master_process) - 1);
|
|
2
|
100 for (i = 0; i < ngx_argc; i++) {
|
|
0
|
101 *p++ = ' ';
|
|
2
|
102 p = ngx_cpystrn(p, (u_char *) ngx_argv[i], size);
|
|
0
|
103 }
|
|
|
104
|
|
|
105 ngx_setproctitle(title);
|
|
|
106
|
|
|
107
|
|
|
108 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
|
109
|
|
|
110 ngx_start_worker_processes(cycle, ccf->worker_processes,
|
|
|
111 NGX_PROCESS_RESPAWN);
|
|
|
112
|
|
|
113 ngx_new_binary = 0;
|
|
|
114 delay = 0;
|
|
|
115 live = 1;
|
|
|
116
|
|
|
117 for ( ;; ) {
|
|
|
118 if (delay) {
|
|
|
119 delay *= 2;
|
|
|
120
|
|
|
121 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
122 "temination cycle: %d", delay);
|
|
|
123
|
|
|
124 itv.it_interval.tv_sec = 0;
|
|
|
125 itv.it_interval.tv_usec = 0;
|
|
|
126 itv.it_value.tv_sec = delay / 1000;
|
|
|
127 itv.it_value.tv_usec = (delay % 1000 ) * 1000;
|
|
|
128
|
|
|
129 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
|
|
|
130 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
131 "setitimer() failed");
|
|
|
132 }
|
|
|
133 }
|
|
|
134
|
|
|
135 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend");
|
|
|
136
|
|
|
137 sigsuspend(&set);
|
|
|
138
|
|
|
139 ngx_gettimeofday(&tv);
|
|
|
140 ngx_time_update(tv.tv_sec);
|
|
|
141
|
|
|
142 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "wake up");
|
|
|
143
|
|
|
144 if (ngx_reap) {
|
|
|
145 ngx_reap = 0;
|
|
|
146 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap childs");
|
|
|
147
|
|
|
148 live = ngx_reap_childs(cycle);
|
|
|
149 }
|
|
|
150
|
|
|
151 if (!live && (ngx_terminate || ngx_quit)) {
|
|
2
|
152 ngx_master_exit(cycle);
|
|
0
|
153 }
|
|
|
154
|
|
|
155 if (ngx_terminate) {
|
|
|
156 if (delay == 0) {
|
|
|
157 delay = 50;
|
|
|
158 }
|
|
|
159
|
|
|
160 if (delay > 1000) {
|
|
|
161 ngx_signal_worker_processes(cycle, SIGKILL);
|
|
|
162 } else {
|
|
|
163 ngx_signal_worker_processes(cycle,
|
|
|
164 ngx_signal_value(NGX_TERMINATE_SIGNAL));
|
|
|
165 }
|
|
|
166
|
|
|
167 continue;
|
|
|
168 }
|
|
|
169
|
|
|
170 if (ngx_quit) {
|
|
|
171 ngx_signal_worker_processes(cycle,
|
|
|
172 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
|
|
|
173 continue;
|
|
|
174 }
|
|
|
175
|
|
|
176 if (ngx_timer) {
|
|
|
177 ngx_timer = 0;
|
|
4
|
178
|
|
|
179 if (!ngx_noaccepting) {
|
|
|
180 ngx_start_worker_processes(cycle, ccf->worker_processes,
|
|
|
181 NGX_PROCESS_JUST_RESPAWN);
|
|
|
182 live = 1;
|
|
|
183 ngx_signal_worker_processes(cycle,
|
|
0
|
184 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
|
|
4
|
185 }
|
|
0
|
186 }
|
|
|
187
|
|
|
188 if (ngx_reconfigure) {
|
|
|
189 ngx_reconfigure = 0;
|
|
|
190
|
|
|
191 if (ngx_new_binary) {
|
|
|
192 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start new workers");
|
|
|
193
|
|
|
194 ngx_start_worker_processes(cycle, ccf->worker_processes,
|
|
|
195 NGX_PROCESS_RESPAWN);
|
|
|
196 ngx_noaccepting = 0;
|
|
|
197
|
|
|
198 continue;
|
|
|
199 }
|
|
|
200
|
|
|
201 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring");
|
|
|
202
|
|
|
203 cycle = ngx_init_cycle(cycle);
|
|
|
204 if (cycle == NULL) {
|
|
|
205 cycle = (ngx_cycle_t *) ngx_cycle;
|
|
|
206 continue;
|
|
|
207 }
|
|
|
208
|
|
|
209 ngx_cycle = cycle;
|
|
|
210 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
|
|
|
211 ngx_core_module);
|
|
|
212 ngx_start_worker_processes(cycle, ccf->worker_processes,
|
|
|
213 NGX_PROCESS_JUST_RESPAWN);
|
|
|
214 live = 1;
|
|
|
215 ngx_signal_worker_processes(cycle,
|
|
|
216 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
|
|
|
217 }
|
|
|
218
|
|
|
219 if (ngx_restart) {
|
|
|
220 ngx_restart = 0;
|
|
|
221 ngx_start_worker_processes(cycle, ccf->worker_processes,
|
|
|
222 NGX_PROCESS_RESPAWN);
|
|
|
223 live = 1;
|
|
|
224 }
|
|
|
225
|
|
|
226 if (ngx_reopen) {
|
|
|
227 ngx_reopen = 0;
|
|
|
228 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs");
|
|
|
229 ngx_reopen_files(cycle, ccf->user);
|
|
|
230 ngx_signal_worker_processes(cycle,
|
|
|
231 ngx_signal_value(NGX_REOPEN_SIGNAL));
|
|
|
232 }
|
|
|
233
|
|
|
234 if (ngx_change_binary) {
|
|
|
235 ngx_change_binary = 0;
|
|
|
236 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "changing binary");
|
|
2
|
237 ngx_new_binary = ngx_exec_new_binary(cycle, ngx_argv);
|
|
0
|
238 }
|
|
|
239
|
|
|
240 if (ngx_noaccept) {
|
|
|
241 ngx_noaccept = 0;
|
|
|
242 ngx_noaccepting = 1;
|
|
|
243 ngx_signal_worker_processes(cycle,
|
|
|
244 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
|
|
|
245 }
|
|
|
246 }
|
|
|
247 }
|
|
|
248
|
|
|
249
|
|
2
|
250 void ngx_single_process_cycle(ngx_cycle_t *cycle)
|
|
0
|
251 {
|
|
|
252 ngx_uint_t i;
|
|
|
253
|
|
|
254 ngx_init_temp_number();
|
|
|
255
|
|
|
256 for (i = 0; ngx_modules[i]; i++) {
|
|
|
257 if (ngx_modules[i]->init_process) {
|
|
|
258 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
|
|
|
259 /* fatal */
|
|
|
260 exit(2);
|
|
|
261 }
|
|
|
262 }
|
|
|
263 }
|
|
|
264
|
|
|
265 for ( ;; ) {
|
|
|
266 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
|
|
|
267
|
|
|
268 ngx_process_events(cycle);
|
|
|
269
|
|
|
270 if (ngx_terminate || ngx_quit) {
|
|
2
|
271 ngx_master_exit(cycle);
|
|
0
|
272 }
|
|
|
273
|
|
|
274 if (ngx_reconfigure) {
|
|
|
275 ngx_reconfigure = 0;
|
|
|
276 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring");
|
|
|
277
|
|
|
278 cycle = ngx_init_cycle(cycle);
|
|
|
279 if (cycle == NULL) {
|
|
|
280 cycle = (ngx_cycle_t *) ngx_cycle;
|
|
|
281 continue;
|
|
|
282 }
|
|
|
283
|
|
|
284 ngx_cycle = cycle;
|
|
|
285 }
|
|
|
286
|
|
|
287 if (ngx_reopen) {
|
|
|
288 ngx_reopen = 0;
|
|
|
289 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs");
|
|
|
290 ngx_reopen_files(cycle, (ngx_uid_t) -1);
|
|
|
291 }
|
|
|
292 }
|
|
|
293 }
|
|
|
294
|
|
|
295
|
|
|
296 static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n,
|
|
|
297 ngx_int_t type)
|
|
|
298 {
|
|
|
299 ngx_int_t i;
|
|
|
300 ngx_channel_t ch;
|
|
|
301 struct itimerval itv;
|
|
|
302
|
|
|
303 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start worker processes");
|
|
|
304
|
|
|
305 ch.command = NGX_CMD_OPEN_CHANNEL;
|
|
|
306
|
|
|
307 while (n--) {
|
|
|
308 ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL,
|
|
|
309 "worker process", type);
|
|
|
310
|
|
|
311 ch.pid = ngx_processes[ngx_process_slot].pid;
|
|
|
312 ch.slot = ngx_process_slot;
|
|
|
313 ch.fd = ngx_processes[ngx_process_slot].channel[0];
|
|
|
314
|
|
|
315 for (i = 0; i < ngx_last_process; i++) {
|
|
|
316
|
|
|
317 if (i == ngx_process_slot
|
|
|
318 || ngx_processes[i].pid == -1
|
|
|
319 || ngx_processes[i].channel[0] == -1)
|
|
|
320 {
|
|
|
321 continue;
|
|
|
322 }
|
|
|
323
|
|
|
324 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
325 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
|
|
|
326 ch.slot, ch.pid, ch.fd,
|
|
|
327 i, ngx_processes[i].pid,
|
|
|
328 ngx_processes[i].channel[0]);
|
|
0
|
329
|
|
|
330 /* TODO: NGX_AGAIN */
|
|
|
331
|
|
|
332 ngx_write_channel(ngx_processes[i].channel[0],
|
|
|
333 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
|
334 }
|
|
|
335 }
|
|
|
336
|
|
|
337 /*
|
|
|
338 * we have to limit the maximum life time of the worker processes
|
|
|
339 * by 10 days because our millisecond event timer is limited
|
|
|
340 * by 24 days on 32-bit platforms
|
|
|
341 */
|
|
|
342
|
|
|
343 itv.it_interval.tv_sec = 0;
|
|
|
344 itv.it_interval.tv_usec = 0;
|
|
|
345 itv.it_value.tv_sec = 10 * 24 * 60 * 60;
|
|
|
346 itv.it_value.tv_usec = 0;
|
|
|
347
|
|
|
348 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
|
|
|
349 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
350 "setitimer() failed");
|
|
|
351 }
|
|
|
352 }
|
|
|
353
|
|
|
354
|
|
|
355 static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo)
|
|
|
356 {
|
|
|
357 ngx_int_t i;
|
|
|
358 ngx_err_t err;
|
|
|
359 ngx_channel_t ch;
|
|
|
360
|
|
|
361
|
|
|
362 switch (signo) {
|
|
|
363
|
|
|
364 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
|
|
|
365 ch.command = NGX_CMD_QUIT;
|
|
|
366 break;
|
|
|
367
|
|
|
368 case ngx_signal_value(NGX_TERMINATE_SIGNAL):
|
|
|
369 ch.command = NGX_CMD_TERMINATE;
|
|
|
370 break;
|
|
|
371
|
|
|
372 case ngx_signal_value(NGX_REOPEN_SIGNAL):
|
|
|
373 ch.command = NGX_CMD_REOPEN;
|
|
|
374 break;
|
|
|
375
|
|
|
376 default:
|
|
|
377 ch.command = 0;
|
|
|
378 }
|
|
|
379
|
|
|
380 ch.fd = -1;
|
|
|
381
|
|
|
382
|
|
|
383 for (i = 0; i < ngx_last_process; i++) {
|
|
|
384
|
|
|
385 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
386 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
|
|
0
|
387 i,
|
|
|
388 ngx_processes[i].pid,
|
|
|
389 ngx_processes[i].exiting,
|
|
|
390 ngx_processes[i].exited,
|
|
|
391 ngx_processes[i].detached,
|
|
|
392 ngx_processes[i].respawn,
|
|
|
393 ngx_processes[i].just_respawn);
|
|
|
394
|
|
|
395 if (ngx_processes[i].detached || ngx_processes[i].pid == -1) {
|
|
|
396 continue;
|
|
|
397 }
|
|
|
398
|
|
|
399 if (ngx_processes[i].just_respawn) {
|
|
|
400 ngx_processes[i].just_respawn = 0;
|
|
|
401 continue;
|
|
|
402 }
|
|
|
403
|
|
|
404 if (ngx_processes[i].exiting
|
|
|
405 && signo == ngx_signal_value(NGX_SHUTDOWN_SIGNAL))
|
|
|
406 {
|
|
|
407 continue;
|
|
|
408 }
|
|
|
409
|
|
|
410 if (ch.command) {
|
|
|
411 if (ngx_write_channel(ngx_processes[i].channel[0],
|
|
|
412 &ch, sizeof(ngx_channel_t), cycle->log) == NGX_OK)
|
|
|
413 {
|
|
|
414 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
|
415 ngx_processes[i].exiting = 1;
|
|
|
416 }
|
|
|
417
|
|
|
418 continue;
|
|
|
419 }
|
|
|
420 }
|
|
|
421
|
|
|
422 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
423 "kill (%P, %d)" , ngx_processes[i].pid, signo);
|
|
0
|
424
|
|
|
425 if (kill(ngx_processes[i].pid, signo) == -1) {
|
|
|
426 err = ngx_errno;
|
|
|
427 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
10
|
428 "kill(%P, %d) failed",
|
|
0
|
429 ngx_processes[i].pid, signo);
|
|
|
430
|
|
|
431 if (err == NGX_ESRCH) {
|
|
|
432 ngx_processes[i].exited = 1;
|
|
|
433 ngx_processes[i].exiting = 0;
|
|
|
434 ngx_reap = 1;
|
|
|
435 }
|
|
|
436
|
|
|
437 continue;
|
|
|
438 }
|
|
|
439
|
|
|
440 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
|
441 ngx_processes[i].exiting = 1;
|
|
|
442 }
|
|
|
443 }
|
|
|
444 }
|
|
|
445
|
|
|
446
|
|
|
447 static ngx_uint_t ngx_reap_childs(ngx_cycle_t *cycle)
|
|
|
448 {
|
|
|
449 ngx_int_t i, n;
|
|
|
450 ngx_uint_t live;
|
|
|
451 ngx_channel_t ch;
|
|
|
452
|
|
|
453 ch.command = NGX_CMD_CLOSE_CHANNEL;
|
|
|
454 ch.fd = -1;
|
|
|
455
|
|
|
456 live = 0;
|
|
|
457 for (i = 0; i < ngx_last_process; i++) {
|
|
|
458
|
|
|
459 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
460 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
|
|
0
|
461 i,
|
|
|
462 ngx_processes[i].pid,
|
|
|
463 ngx_processes[i].exiting,
|
|
|
464 ngx_processes[i].exited,
|
|
|
465 ngx_processes[i].detached,
|
|
|
466 ngx_processes[i].respawn,
|
|
|
467 ngx_processes[i].just_respawn);
|
|
|
468
|
|
|
469 if (ngx_processes[i].pid == -1) {
|
|
|
470 continue;
|
|
|
471 }
|
|
|
472
|
|
|
473 if (ngx_processes[i].exited) {
|
|
|
474
|
|
|
475 if (!ngx_processes[i].detached) {
|
|
|
476 ngx_close_channel(ngx_processes[i].channel, cycle->log);
|
|
|
477
|
|
|
478 ngx_processes[i].channel[0] = -1;
|
|
|
479 ngx_processes[i].channel[1] = -1;
|
|
|
480
|
|
|
481 ch.pid = ngx_processes[i].pid;
|
|
|
482 ch.slot = i;
|
|
|
483
|
|
|
484 for (n = 0; n < ngx_last_process; n++) {
|
|
|
485 if (ngx_processes[n].exited
|
|
|
486 || ngx_processes[n].pid == -1
|
|
|
487 || ngx_processes[n].channel[0] == -1)
|
|
|
488 {
|
|
|
489 continue;
|
|
|
490 }
|
|
|
491
|
|
|
492 ngx_log_debug3(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
493 "pass close channel s:%i pid:%P to:%P",
|
|
|
494 ch.slot, ch.pid, ngx_processes[n].pid);
|
|
0
|
495
|
|
|
496 /* TODO: NGX_AGAIN */
|
|
|
497
|
|
|
498 ngx_write_channel(ngx_processes[n].channel[0],
|
|
|
499 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
|
500 }
|
|
|
501 }
|
|
|
502
|
|
|
503 if (ngx_processes[i].respawn
|
|
|
504 && !ngx_processes[i].exiting
|
|
|
505 && !ngx_terminate
|
|
|
506 && !ngx_quit)
|
|
|
507 {
|
|
|
508 if (ngx_spawn_process(cycle, ngx_processes[i].proc,
|
|
|
509 ngx_processes[i].data,
|
|
|
510 ngx_processes[i].name, i)
|
|
|
511 == NGX_ERROR)
|
|
|
512 {
|
|
|
513 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
514 "can not respawn %s", ngx_processes[i].name);
|
|
|
515 continue;
|
|
|
516 }
|
|
|
517
|
|
|
518 live = 1;
|
|
|
519
|
|
|
520 continue;
|
|
|
521 }
|
|
|
522
|
|
|
523 if (ngx_processes[i].pid == ngx_new_binary) {
|
|
|
524 ngx_new_binary = 0;
|
|
|
525 if (ngx_noaccepting) {
|
|
|
526 ngx_restart = 1;
|
|
|
527 ngx_noaccepting = 0;
|
|
|
528 }
|
|
|
529 }
|
|
|
530
|
|
|
531 if (i == ngx_last_process - 1) {
|
|
|
532 ngx_last_process--;
|
|
|
533
|
|
|
534 } else {
|
|
|
535 ngx_processes[i].pid = -1;
|
|
|
536 }
|
|
|
537
|
|
|
538 } else if (ngx_processes[i].exiting || !ngx_processes[i].detached) {
|
|
|
539 live = 1;
|
|
|
540 }
|
|
|
541 }
|
|
|
542
|
|
|
543 return live;
|
|
|
544 }
|
|
|
545
|
|
|
546
|
|
2
|
547 static void ngx_master_exit(ngx_cycle_t *cycle)
|
|
0
|
548 {
|
|
|
549 ngx_delete_pidfile(cycle);
|
|
|
550
|
|
|
551 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exit");
|
|
|
552
|
|
|
553 ngx_destroy_pool(cycle->pool);
|
|
|
554
|
|
|
555 exit(0);
|
|
|
556 }
|
|
|
557
|
|
|
558
|
|
|
559 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data)
|
|
|
560 {
|
|
|
561 sigset_t set;
|
|
|
562 ngx_err_t err;
|
|
|
563 ngx_int_t n;
|
|
|
564 ngx_uint_t i;
|
|
|
565 struct timeval tv;
|
|
|
566 ngx_listening_t *ls;
|
|
|
567 ngx_core_conf_t *ccf;
|
|
|
568 ngx_connection_t *c;
|
|
|
569
|
|
|
570
|
|
|
571 ngx_gettimeofday(&tv);
|
|
|
572
|
|
|
573 ngx_start_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
|
|
|
574 ngx_old_elapsed_msec = 0;
|
|
|
575 ngx_elapsed_msec = 0;
|
|
|
576
|
|
|
577
|
|
|
578 ngx_process = NGX_PROCESS_WORKER;
|
|
|
579
|
|
|
580 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
|
581
|
|
4
|
582 if (geteuid() == 0) {
|
|
0
|
583 if (setgid(ccf->group) == -1) {
|
|
|
584 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
585 "setgid(%d) failed", ccf->group);
|
|
|
586 /* fatal */
|
|
|
587 exit(2);
|
|
|
588 }
|
|
|
589
|
|
|
590 if (setuid(ccf->user) == -1) {
|
|
|
591 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
592 "setuid(%d) failed", ccf->user);
|
|
|
593 /* fatal */
|
|
|
594 exit(2);
|
|
|
595 }
|
|
|
596 }
|
|
|
597
|
|
4
|
598 #if (NGX_HAVE_PR_SET_DUMPABLE)
|
|
0
|
599
|
|
|
600 /* allow coredump after setuid() in Linux 2.4.x */
|
|
|
601
|
|
|
602 if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) {
|
|
|
603 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
604 "prctl(PR_SET_DUMPABLE) failed");
|
|
|
605 }
|
|
|
606
|
|
|
607 #endif
|
|
|
608
|
|
|
609 sigemptyset(&set);
|
|
|
610
|
|
|
611 if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) {
|
|
|
612 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
613 "sigprocmask() failed");
|
|
|
614 }
|
|
|
615
|
|
|
616 ngx_init_temp_number();
|
|
|
617
|
|
|
618 /*
|
|
|
619 * disable deleting previous events for the listening sockets because
|
|
|
620 * in the worker processes there are no events at all at this point
|
|
|
621 */
|
|
|
622 ls = cycle->listening.elts;
|
|
|
623 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
|
624 ls[i].remain = 0;
|
|
|
625 }
|
|
|
626
|
|
|
627 for (i = 0; ngx_modules[i]; i++) {
|
|
|
628 if (ngx_modules[i]->init_process) {
|
|
|
629 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
|
|
|
630 /* fatal */
|
|
|
631 exit(2);
|
|
|
632 }
|
|
|
633 }
|
|
|
634 }
|
|
|
635
|
|
|
636 for (n = 0; n < ngx_last_process; n++) {
|
|
|
637
|
|
|
638 if (ngx_processes[n].pid == -1) {
|
|
|
639 continue;
|
|
|
640 }
|
|
|
641
|
|
|
642 if (n == ngx_process_slot) {
|
|
|
643 continue;
|
|
|
644 }
|
|
|
645
|
|
|
646 if (ngx_processes[n].channel[1] == -1) {
|
|
|
647 continue;
|
|
|
648 }
|
|
|
649
|
|
|
650 if (close(ngx_processes[n].channel[1]) == -1) {
|
|
|
651 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
652 "close() failed");
|
|
|
653 }
|
|
|
654 }
|
|
|
655
|
|
|
656 if (close(ngx_processes[ngx_process_slot].channel[0]) == -1) {
|
|
|
657 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
658 "close() failed");
|
|
|
659 }
|
|
|
660
|
|
|
661 #if 0
|
|
|
662 ngx_last_process = 0;
|
|
|
663 #endif
|
|
|
664
|
|
|
665 if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT,
|
|
|
666 ngx_channel_handler) == NGX_ERROR)
|
|
|
667 {
|
|
|
668 /* fatal */
|
|
|
669 exit(2);
|
|
|
670 }
|
|
|
671
|
|
|
672 ngx_setproctitle("worker process");
|
|
|
673
|
|
|
674 #if (NGX_THREADS)
|
|
|
675
|
|
|
676 if (ngx_time_mutex_init(cycle->log) == NGX_ERROR) {
|
|
|
677 /* fatal */
|
|
|
678 exit(2);
|
|
|
679 }
|
|
|
680
|
|
|
681 if (ngx_threads_n) {
|
|
|
682 if (ngx_init_threads(ngx_threads_n,
|
|
|
683 ccf->thread_stack_size, cycle) == NGX_ERROR)
|
|
|
684 {
|
|
|
685 /* fatal */
|
|
|
686 exit(2);
|
|
|
687 }
|
|
|
688
|
|
|
689 err = ngx_thread_key_create(&ngx_core_tls_key);
|
|
|
690 if (err != 0) {
|
|
|
691 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
692 ngx_thread_key_create_n " failed");
|
|
|
693 /* fatal */
|
|
|
694 exit(2);
|
|
|
695 }
|
|
|
696
|
|
|
697 for (n = 0; n < ngx_threads_n; n++) {
|
|
|
698
|
|
|
699 if (!(ngx_threads[n].cv = ngx_cond_init(cycle->log))) {
|
|
|
700 /* fatal */
|
|
|
701 exit(2);
|
|
|
702 }
|
|
|
703
|
|
|
704 if (ngx_create_thread((ngx_tid_t *) &ngx_threads[n].tid,
|
|
|
705 ngx_worker_thread_cycle,
|
|
|
706 (void *) &ngx_threads[n], cycle->log) != 0)
|
|
|
707 {
|
|
|
708 /* fatal */
|
|
|
709 exit(2);
|
|
|
710 }
|
|
|
711 }
|
|
|
712 }
|
|
|
713
|
|
|
714 #endif
|
|
|
715
|
|
|
716 for ( ;; ) {
|
|
|
717 if (ngx_exiting
|
|
|
718 && ngx_event_timer_rbtree == &ngx_event_timer_sentinel)
|
|
|
719 {
|
|
|
720 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting");
|
|
|
721
|
|
|
722
|
|
|
723 #if (NGX_THREADS)
|
|
|
724 ngx_terminate = 1;
|
|
|
725
|
|
|
726 ngx_wakeup_worker_threads(cycle);
|
|
|
727 #endif
|
|
|
728
|
|
|
729 /*
|
|
|
730 * we do not destroy cycle->pool here because a signal handler
|
|
|
731 * that uses cycle->log can be called at this point
|
|
|
732 */
|
|
|
733 exit(0);
|
|
|
734 }
|
|
|
735
|
|
|
736 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
|
|
|
737
|
|
|
738 ngx_process_events(cycle);
|
|
|
739
|
|
|
740 if (ngx_terminate) {
|
|
|
741 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting");
|
|
|
742
|
|
|
743 #if (NGX_THREADS)
|
|
|
744 ngx_wakeup_worker_threads(cycle);
|
|
|
745 #endif
|
|
|
746
|
|
|
747 /*
|
|
|
748 * we do not destroy cycle->pool here because a signal handler
|
|
|
749 * that uses cycle->log can be called at this point
|
|
|
750 */
|
|
|
751 exit(0);
|
|
|
752 }
|
|
|
753
|
|
|
754 if (ngx_quit) {
|
|
|
755 ngx_quit = 0;
|
|
|
756 ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
|
|
|
757 "gracefully shutting down");
|
|
|
758 ngx_setproctitle("worker process is shutting down");
|
|
|
759
|
|
|
760 if (!ngx_exiting) {
|
|
|
761 ngx_close_listening_sockets(cycle);
|
|
|
762 ngx_exiting = 1;
|
|
|
763 }
|
|
|
764 }
|
|
|
765
|
|
|
766 if (ngx_reopen) {
|
|
|
767 ngx_reopen = 0;
|
|
|
768 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopen logs");
|
|
|
769 ngx_reopen_files(cycle, -1);
|
|
|
770 }
|
|
|
771 }
|
|
|
772 }
|
|
|
773
|
|
|
774
|
|
|
775 static void ngx_channel_handler(ngx_event_t *ev)
|
|
|
776 {
|
|
|
777 ngx_int_t n;
|
|
|
778 ngx_channel_t ch;
|
|
|
779 ngx_connection_t *c;
|
|
|
780
|
|
|
781 c = ev->data;
|
|
|
782
|
|
|
783 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler");
|
|
|
784
|
|
|
785 n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log);
|
|
|
786
|
|
10
|
787 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %i", n);
|
|
0
|
788
|
|
10
|
789 if (n == NGX_ERROR) {
|
|
|
790 if (close(c->fd) == -1) {
|
|
|
791 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
792 "close() channel failed");
|
|
|
793 }
|
|
|
794
|
|
|
795 c->fd = -1;
|
|
|
796 return;
|
|
|
797 }
|
|
|
798
|
|
|
799 if (n == NGX_AGAIN) {
|
|
0
|
800 return;
|
|
|
801 }
|
|
|
802
|
|
|
803 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
|
804 "channel command: %d", ch.command);
|
|
|
805
|
|
|
806 switch (ch.command) {
|
|
|
807
|
|
|
808 case NGX_CMD_QUIT:
|
|
|
809 ngx_quit = 1;
|
|
|
810 break;
|
|
|
811
|
|
|
812 case NGX_CMD_TERMINATE:
|
|
|
813 ngx_terminate = 1;
|
|
|
814 break;
|
|
|
815
|
|
|
816 case NGX_CMD_REOPEN:
|
|
|
817 ngx_reopen = 1;
|
|
|
818 break;
|
|
|
819
|
|
|
820 case NGX_CMD_OPEN_CHANNEL:
|
|
|
821
|
|
|
822 ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
10
|
823 "get channel s:%i pid:%P fd:%d", ch.slot, ch.pid, ch.fd);
|
|
0
|
824
|
|
|
825 ngx_processes[ch.slot].pid = ch.pid;
|
|
|
826 ngx_processes[ch.slot].channel[0] = ch.fd;
|
|
|
827 break;
|
|
|
828
|
|
|
829 case NGX_CMD_CLOSE_CHANNEL:
|
|
|
830
|
|
|
831 ngx_log_debug4(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
10
|
832 "close channel s:%i pid:%P our:%P fd:%d",
|
|
0
|
833 ch.slot, ch.pid, ngx_processes[ch.slot].pid,
|
|
|
834 ngx_processes[ch.slot].channel[0]);
|
|
|
835
|
|
|
836 if (close(ngx_processes[ch.slot].channel[0]) == -1) {
|
|
|
837 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "close() failed");
|
|
|
838 }
|
|
|
839
|
|
|
840 ngx_processes[ch.slot].channel[0] = -1;
|
|
|
841 break;
|
|
|
842 }
|
|
|
843 }
|
|
|
844
|
|
|
845
|
|
|
846 #if (NGX_THREADS)
|
|
|
847
|
|
|
848 static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle)
|
|
|
849 {
|
|
|
850 ngx_int_t i;
|
|
|
851 ngx_uint_t live;
|
|
|
852
|
|
|
853 for ( ;; ) {
|
|
|
854
|
|
|
855 live = 0;
|
|
|
856
|
|
|
857 for (i = 0; i < ngx_threads_n; i++) {
|
|
|
858 if (ngx_threads[i].state < NGX_THREAD_EXIT) {
|
|
|
859 ngx_cond_signal(ngx_threads[i].cv);
|
|
|
860
|
|
|
861 if (ngx_threads[i].cv->tid == (ngx_tid_t) -1) {
|
|
|
862 ngx_threads[i].state = NGX_THREAD_DONE;
|
|
|
863 } else {
|
|
|
864 live = 1;
|
|
|
865 }
|
|
|
866 }
|
|
|
867
|
|
|
868 if (ngx_threads[i].state == NGX_THREAD_EXIT) {
|
|
|
869 ngx_thread_join(ngx_threads[i].tid, NULL);
|
|
|
870 ngx_threads[i].state = NGX_THREAD_DONE;
|
|
|
871 }
|
|
|
872 }
|
|
|
873
|
|
|
874 if (live == 0) {
|
|
|
875 ngx_log_debug0(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
876 "all worker threads are joined");
|
|
|
877
|
|
|
878 /* STUB */
|
|
|
879 ngx_done_events(cycle);
|
|
|
880 ngx_mutex_destroy(ngx_event_timer_mutex);
|
|
|
881 ngx_mutex_destroy(ngx_posted_events_mutex);
|
|
|
882
|
|
|
883 return;
|
|
|
884 }
|
|
|
885
|
|
|
886 ngx_sched_yield();
|
|
|
887 }
|
|
|
888 }
|
|
|
889
|
|
|
890
|
|
10
|
891 static void *ngx_worker_thread_cycle(void *data)
|
|
0
|
892 {
|
|
|
893 ngx_thread_t *thr = data;
|
|
|
894
|
|
|
895 sigset_t set;
|
|
|
896 ngx_err_t err;
|
|
|
897 ngx_core_tls_t *tls;
|
|
|
898 ngx_cycle_t *cycle;
|
|
|
899 struct timeval tv;
|
|
|
900
|
|
|
901 thr->cv->tid = ngx_thread_self();
|
|
|
902
|
|
|
903 cycle = (ngx_cycle_t *) ngx_cycle;
|
|
|
904
|
|
|
905 sigemptyset(&set);
|
|
|
906 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
|
|
|
907 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
|
|
|
908 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
|
|
|
909
|
|
|
910 err = ngx_thread_sigmask(SIG_BLOCK, &set, NULL);
|
|
|
911 if (err) {
|
|
|
912 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
913 ngx_thread_sigmask_n " failed");
|
|
|
914 return (void *) 1;
|
|
|
915 }
|
|
|
916
|
|
|
917 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
918 "thread " NGX_TID_T_FMT " started", ngx_thread_self());
|
|
0
|
919
|
|
|
920 ngx_setthrtitle("worker thread");
|
|
|
921
|
|
|
922 if (!(tls = ngx_calloc(sizeof(ngx_core_tls_t), cycle->log))) {
|
|
|
923 return (void *) 1;
|
|
|
924 }
|
|
|
925
|
|
|
926 err = ngx_thread_set_tls(ngx_core_tls_key, tls);
|
|
|
927 if (err != 0) {
|
|
|
928 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
929 ngx_thread_set_tls_n " failed");
|
|
|
930 return (void *) 1;
|
|
|
931 }
|
|
|
932
|
|
|
933 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
934 return (void *) 1;
|
|
|
935 }
|
|
|
936
|
|
|
937 for ( ;; ) {
|
|
|
938 thr->state = NGX_THREAD_FREE;
|
|
|
939
|
|
|
940 if (ngx_cond_wait(thr->cv, ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
941 return (void *) 1;
|
|
|
942 }
|
|
|
943
|
|
|
944 if (ngx_terminate) {
|
|
|
945 thr->state = NGX_THREAD_EXIT;
|
|
|
946
|
|
|
947 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
|
948
|
|
|
949 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
950 "thread " NGX_TID_T_FMT " is done",
|
|
|
951 ngx_thread_self());
|
|
0
|
952
|
|
|
953 return (void *) 0;
|
|
|
954 }
|
|
|
955
|
|
|
956 thr->state = NGX_THREAD_BUSY;
|
|
|
957
|
|
|
958 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
|
959 return (void *) 1;
|
|
|
960 }
|
|
|
961
|
|
|
962 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
|
963 return (void *) 1;
|
|
|
964 }
|
|
|
965
|
|
|
966 if (ngx_process_changes) {
|
|
|
967 if (ngx_process_changes(cycle, 1) == NGX_ERROR) {
|
|
|
968 return (void *) 1;
|
|
|
969 }
|
|
|
970 }
|
|
|
971 }
|
|
|
972 }
|
|
|
973
|
|
|
974 #endif
|
