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Merge commit 'v0.8.10'
[nginx-catap.git] / src / os / unix / ngx_process_cycle.c
blobd8e4b9097e079eed3c7d275f170c66cc4098f2ac
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_start_cache_manager_processes(ngx_cycle_t *cycle,
16 ngx_uint_t respawn);
17 static void ngx_pass_open_channel(ngx_cycle_t *cycle, ngx_channel_t *ch);
18 static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo);
19 static ngx_uint_t ngx_reap_children(ngx_cycle_t *cycle);
20 static void ngx_master_process_exit(ngx_cycle_t *cycle);
21 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data);
22 static void ngx_worker_process_init(ngx_cycle_t *cycle, ngx_uint_t priority);
23 static void ngx_worker_process_exit(ngx_cycle_t *cycle);
24 static void ngx_channel_handler(ngx_event_t *ev);
25 #if (NGX_THREADS)
26 static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle);
27 static ngx_thread_value_t ngx_worker_thread_cycle(void *data);
28 #endif
29 static void ngx_cache_manager_process_cycle(ngx_cycle_t *cycle, void *data);
30 static void ngx_cache_manager_process_handler(ngx_event_t *ev);
31 static void ngx_cache_loader_process_handler(ngx_event_t *ev);
32
33
34 ngx_uint_t ngx_process;
35 ngx_pid_t ngx_pid;
36 ngx_uint_t ngx_threaded;
37
38 sig_atomic_t ngx_reap;
39 sig_atomic_t ngx_sigio;
40 sig_atomic_t ngx_terminate;
41 sig_atomic_t ngx_quit;
42 sig_atomic_t ngx_debug_quit;
43 ngx_uint_t ngx_exiting;
44 sig_atomic_t ngx_reconfigure;
45 sig_atomic_t ngx_reopen;
46
47 sig_atomic_t ngx_change_binary;
48 ngx_pid_t ngx_new_binary;
49 ngx_uint_t ngx_inherited;
50 ngx_uint_t ngx_daemonized;
51
52 sig_atomic_t ngx_noaccept;
53 ngx_uint_t ngx_noaccepting;
54 ngx_uint_t ngx_restart;
55
56
57 #if (NGX_THREADS)
58 volatile ngx_thread_t ngx_threads[NGX_MAX_THREADS];
59 ngx_int_t ngx_threads_n;
60 #endif
61
62
63 u_long cpu_affinity;
64 static u_char master_process[] = "master process";
65
66
67 static ngx_cache_manager_ctx_t ngx_cache_manager_ctx = {
68 ngx_cache_manager_process_handler, "cache manager process", 0
69 };
70
71 static ngx_cache_manager_ctx_t ngx_cache_loader_ctx = {
72 ngx_cache_loader_process_handler, "cache loader process", 60000
73 };
74
75
76 static ngx_cycle_t ngx_exit_cycle;
77 static ngx_log_t ngx_exit_log;
78 static ngx_open_file_t ngx_exit_log_file;
79
80
81 void
82 ngx_master_process_cycle(ngx_cycle_t *cycle)
83 {
84 char *title;
85 u_char *p;
86 size_t size;
87 ngx_int_t i;
88 ngx_uint_t n;
89 sigset_t set;
90 struct itimerval itv;
91 ngx_uint_t live;
92 ngx_msec_t delay;
93 ngx_listening_t *ls;
94 ngx_core_conf_t *ccf;
95
96 sigemptyset(&set);
97 sigaddset(&set, SIGCHLD);
98 sigaddset(&set, SIGALRM);
99 sigaddset(&set, SIGIO);
100 sigaddset(&set, SIGINT);
101 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
102 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
103 sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL));
104 sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL));
105 sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
106 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
107
108 if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) {
109 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
110 "sigprocmask() failed");
111 }
112
113 sigemptyset(&set);
114
115
116 size = sizeof(master_process);
117
118 for (i = 0; i < ngx_argc; i++) {
119 size += ngx_strlen(ngx_argv[i]) + 1;
120 }
121
122 title = ngx_pnalloc(cycle->pool, size);
123
124 p = ngx_cpymem(title, master_process, sizeof(master_process) - 1);
125 for (i = 0; i < ngx_argc; i++) {
126 *p++ = ' ';
127 p = ngx_cpystrn(p, (u_char *) ngx_argv[i], size);
128 }
129
130 ngx_setproctitle(title);
131
132
133 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
134
135 ngx_start_worker_processes(cycle, ccf->worker_processes,
136 NGX_PROCESS_RESPAWN);
137 ngx_start_cache_manager_processes(cycle, 0);
138
139 ngx_new_binary = 0;
140 delay = 0;
141 live = 1;
142
143 for ( ;; ) {
144 if (delay) {
145 delay *= 2;
146
147 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
148 "temination cycle: %d", delay);
149
150 itv.it_interval.tv_sec = 0;
151 itv.it_interval.tv_usec = 0;
152 itv.it_value.tv_sec = delay / 1000;
153 itv.it_value.tv_usec = (delay % 1000 ) * 1000;
154
155 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
156 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
157 "setitimer() failed");
158 }
159 }
160
161 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend");
162
163 sigsuspend(&set);
164
165 ngx_time_update(0, 0);
166
167 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "wake up");
168
169 if (ngx_reap) {
170 ngx_reap = 0;
171 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap children");
172
173 live = ngx_reap_children(cycle);
174 }
175
176 if (!live && (ngx_terminate || ngx_quit)) {
177 ngx_master_process_exit(cycle);
178 }
179
180 if (ngx_terminate) {
181 if (delay == 0) {
182 delay = 50;
183 }
184
185 if (delay > 1000) {
186 ngx_signal_worker_processes(cycle, SIGKILL);
187 } else {
188 ngx_signal_worker_processes(cycle,
189 ngx_signal_value(NGX_TERMINATE_SIGNAL));
190 }
191
192 continue;
193 }
194
195 if (ngx_quit) {
196 ngx_signal_worker_processes(cycle,
197 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
198
199 ls = cycle->listening.elts;
200 for (n = 0; n < cycle->listening.nelts; n++) {
201 if (ngx_close_socket(ls[n].fd) == -1) {
202 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
203 ngx_close_socket_n " %V failed",
204 &ls[n].addr_text);
205 }
206 }
207 cycle->listening.nelts = 0;
208
209 continue;
210 }
211
212 if (ngx_reconfigure) {
213 ngx_reconfigure = 0;
214
215 if (ngx_new_binary) {
216 ngx_start_worker_processes(cycle, ccf->worker_processes,
217 NGX_PROCESS_RESPAWN);
218 ngx_start_cache_manager_processes(cycle, 0);
219 ngx_noaccepting = 0;
220
221 continue;
222 }
223
224 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring");
225
226 cycle = ngx_init_cycle(cycle);
227 if (cycle == NULL) {
228 cycle = (ngx_cycle_t *) ngx_cycle;
229 continue;
230 }
231
232 ngx_cycle = cycle;
233 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
234 ngx_core_module);
235 ngx_start_worker_processes(cycle, ccf->worker_processes,
236 NGX_PROCESS_JUST_RESPAWN);
237 ngx_start_cache_manager_processes(cycle, 1);
238 live = 1;
239 ngx_signal_worker_processes(cycle,
240 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
241 }
242
243 if (ngx_restart) {
244 ngx_restart = 0;
245 ngx_start_worker_processes(cycle, ccf->worker_processes,
246 NGX_PROCESS_RESPAWN);
247 ngx_start_cache_manager_processes(cycle, 0);
248 live = 1;
249 }
250
251 if (ngx_reopen) {
252 ngx_reopen = 0;
253 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
254 ngx_reopen_files(cycle, ccf->user);
255 ngx_signal_worker_processes(cycle,
256 ngx_signal_value(NGX_REOPEN_SIGNAL));
257 }
258
259 if (ngx_change_binary) {
260 ngx_change_binary = 0;
261 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "changing binary");
262 ngx_new_binary = ngx_exec_new_binary(cycle, ngx_argv);
263 }
264
265 if (ngx_noaccept) {
266 ngx_noaccept = 0;
267 ngx_noaccepting = 1;
268 ngx_signal_worker_processes(cycle,
269 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
270 }
271 }
272 }
273
274
275 void
276 ngx_single_process_cycle(ngx_cycle_t *cycle)
277 {
278 ngx_uint_t i;
279
280 for (i = 0; ngx_modules[i]; i++) {
281 if (ngx_modules[i]->init_process) {
282 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
283 /* fatal */
284 exit(2);
285 }
286 }
287 }
288
289 for ( ;; ) {
290 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
291
292 ngx_process_events_and_timers(cycle);
293
294 if (ngx_terminate || ngx_quit) {
295
296 for (i = 0; ngx_modules[i]; i++) {
297 if (ngx_modules[i]->exit_process) {
298 ngx_modules[i]->exit_process(cycle);
299 }
300 }
301
302 ngx_master_process_exit(cycle);
303 }
304
305 if (ngx_reconfigure) {
306 ngx_reconfigure = 0;
307 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring");
308
309 cycle = ngx_init_cycle(cycle);
310 if (cycle == NULL) {
311 cycle = (ngx_cycle_t *) ngx_cycle;
312 continue;
313 }
314
315 ngx_cycle = cycle;
316 }
317
318 if (ngx_reopen) {
319 ngx_reopen = 0;
320 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
321 ngx_reopen_files(cycle, (ngx_uid_t) -1);
322 }
323 }
324 }
325
326
327 static void
328 ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n, ngx_int_t type)
329 {
330 ngx_int_t i;
331 ngx_channel_t ch;
332
333 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start worker processes");
334
335 ch.command = NGX_CMD_OPEN_CHANNEL;
336
337 for (i = 0; i < n; i++) {
338
339 cpu_affinity = ngx_get_cpu_affinity(i);
340
341 ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL,
342 "worker process", type);
343
344 ch.pid = ngx_processes[ngx_process_slot].pid;
345 ch.slot = ngx_process_slot;
346 ch.fd = ngx_processes[ngx_process_slot].channel[0];
347
348 ngx_pass_open_channel(cycle, &ch);
349 }
350 }
351
352
353 static void
354 ngx_start_cache_manager_processes(ngx_cycle_t *cycle, ngx_uint_t respawn)
355 {
356 ngx_uint_t i, manager, loader;
357 ngx_path_t **path;
358 ngx_channel_t ch;
359
360 manager = 0;
361 loader = 0;
362
363 path = ngx_cycle->pathes.elts;
364 for (i = 0; i < ngx_cycle->pathes.nelts; i++) {
365
366 if (path[i]->manager) {
367 manager = 1;
368 }
369
370 if (path[i]->loader) {
371 loader = 1;
372 }
373 }
374
375 if (manager == 0) {
376 return;
377 }
378
379 ngx_spawn_process(cycle, ngx_cache_manager_process_cycle,
380 &ngx_cache_manager_ctx, "cache manager process",
381 respawn ? NGX_PROCESS_JUST_RESPAWN : NGX_PROCESS_RESPAWN);
382
383 ch.command = NGX_CMD_OPEN_CHANNEL;
384 ch.pid = ngx_processes[ngx_process_slot].pid;
385 ch.slot = ngx_process_slot;
386 ch.fd = ngx_processes[ngx_process_slot].channel[0];
387
388 ngx_pass_open_channel(cycle, &ch);
389
390 if (loader == 0) {
391 return;
392 }
393
394 ngx_spawn_process(cycle, ngx_cache_manager_process_cycle,
395 &ngx_cache_loader_ctx, "cache loader process",
396 respawn ? NGX_PROCESS_JUST_SPAWN : NGX_PROCESS_NORESPAWN);
397
398 ch.command = NGX_CMD_OPEN_CHANNEL;
399 ch.pid = ngx_processes[ngx_process_slot].pid;
400 ch.slot = ngx_process_slot;
401 ch.fd = ngx_processes[ngx_process_slot].channel[0];
402
403 ngx_pass_open_channel(cycle, &ch);
404 }
405
406
407 static void
408 ngx_pass_open_channel(ngx_cycle_t *cycle, ngx_channel_t *ch)
409 {
410 ngx_int_t i;
411
412 for (i = 0; i < ngx_last_process; i++) {
413
414 if (i == ngx_process_slot
415 || ngx_processes[i].pid == -1
416 || ngx_processes[i].channel[0] == -1)
417 {
418 continue;
419 }
420
421 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
422 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
423 ch->slot, ch->pid, ch->fd,
424 i, ngx_processes[i].pid,
425 ngx_processes[i].channel[0]);
426
427 /* TODO: NGX_AGAIN */
428
429 ngx_write_channel(ngx_processes[i].channel[0],
430 ch, sizeof(ngx_channel_t), cycle->log);
431 }
432 }
433
434
435 static void
436 ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo)
437 {
438 ngx_int_t i;
439 ngx_err_t err;
440 ngx_channel_t ch;
441
442 #if (NGX_BROKEN_SCM_RIGHTS)
443
444 ch.command = 0;
445
446 #else
447
448 switch (signo) {
449
450 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
451 ch.command = NGX_CMD_QUIT;
452 break;
453
454 case ngx_signal_value(NGX_TERMINATE_SIGNAL):
455 ch.command = NGX_CMD_TERMINATE;
456 break;
457
458 case ngx_signal_value(NGX_REOPEN_SIGNAL):
459 ch.command = NGX_CMD_REOPEN;
460 break;
461
462 default:
463 ch.command = 0;
464 }
465
466 #endif
467
468 ch.fd = -1;
469
470
471 for (i = 0; i < ngx_last_process; i++) {
472
473 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
474 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
475 i,
476 ngx_processes[i].pid,
477 ngx_processes[i].exiting,
478 ngx_processes[i].exited,
479 ngx_processes[i].detached,
480 ngx_processes[i].respawn,
481 ngx_processes[i].just_spawn);
482
483 if (ngx_processes[i].detached || ngx_processes[i].pid == -1) {
484 continue;
485 }
486
487 if (ngx_processes[i].just_spawn) {
488 ngx_processes[i].just_spawn = 0;
489 continue;
490 }
491
492 if (ngx_processes[i].exiting
493 && signo == ngx_signal_value(NGX_SHUTDOWN_SIGNAL))
494 {
495 continue;
496 }
497
498 if (ch.command) {
499 if (ngx_write_channel(ngx_processes[i].channel[0],
500 &ch, sizeof(ngx_channel_t), cycle->log)
501 == NGX_OK)
502 {
503 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
504 ngx_processes[i].exiting = 1;
505 }
506
507 continue;
508 }
509 }
510
511 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
512 "kill (%P, %d)" , ngx_processes[i].pid, signo);
513
514 if (kill(ngx_processes[i].pid, signo) == -1) {
515 err = ngx_errno;
516 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
517 "kill(%P, %d) failed",
518 ngx_processes[i].pid, signo);
519
520 if (err == NGX_ESRCH) {
521 ngx_processes[i].exited = 1;
522 ngx_processes[i].exiting = 0;
523 ngx_reap = 1;
524 }
525
526 continue;
527 }
528
529 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
530 ngx_processes[i].exiting = 1;
531 }
532 }
533 }
534
535
536 static ngx_uint_t
537 ngx_reap_children(ngx_cycle_t *cycle)
538 {
539 ngx_int_t i, n;
540 ngx_uint_t live;
541 ngx_channel_t ch;
542 ngx_core_conf_t *ccf;
543
544 ch.command = NGX_CMD_CLOSE_CHANNEL;
545 ch.fd = -1;
546
547 live = 0;
548 for (i = 0; i < ngx_last_process; i++) {
549
550 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
551 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
552 i,
553 ngx_processes[i].pid,
554 ngx_processes[i].exiting,
555 ngx_processes[i].exited,
556 ngx_processes[i].detached,
557 ngx_processes[i].respawn,
558 ngx_processes[i].just_spawn);
559
560 if (ngx_processes[i].pid == -1) {
561 continue;
562 }
563
564 if (ngx_processes[i].exited) {
565
566 if (!ngx_processes[i].detached) {
567 ngx_close_channel(ngx_processes[i].channel, cycle->log);
568
569 ngx_processes[i].channel[0] = -1;
570 ngx_processes[i].channel[1] = -1;
571
572 ch.pid = ngx_processes[i].pid;
573 ch.slot = i;
574
575 for (n = 0; n < ngx_last_process; n++) {
576 if (ngx_processes[n].exited
577 || ngx_processes[n].pid == -1
578 || ngx_processes[n].channel[0] == -1)
579 {
580 continue;
581 }
582
583 ngx_log_debug3(NGX_LOG_DEBUG_CORE, cycle->log, 0,
584 "pass close channel s:%i pid:%P to:%P",
585 ch.slot, ch.pid, ngx_processes[n].pid);
586
587 /* TODO: NGX_AGAIN */
588
589 ngx_write_channel(ngx_processes[n].channel[0],
590 &ch, sizeof(ngx_channel_t), cycle->log);
591 }
592 }
593
594 if (ngx_processes[i].respawn
595 && !ngx_processes[i].exiting
596 && !ngx_terminate
597 && !ngx_quit)
598 {
599 if (ngx_spawn_process(cycle, ngx_processes[i].proc,
600 ngx_processes[i].data,
601 ngx_processes[i].name, i)
602 == NGX_INVALID_PID)
603 {
604 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
605 "can not respawn %s", ngx_processes[i].name);
606 continue;
607 }
608
609
610 ch.command = NGX_CMD_OPEN_CHANNEL;
611 ch.pid = ngx_processes[ngx_process_slot].pid;
612 ch.slot = ngx_process_slot;
613 ch.fd = ngx_processes[ngx_process_slot].channel[0];
614
615 ngx_pass_open_channel(cycle, &ch);
616
617 live = 1;
618
619 continue;
620 }
621
622 if (ngx_processes[i].pid == ngx_new_binary) {
623
624 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
625 ngx_core_module);
626
627 if (ngx_rename_file((char *) ccf->oldpid.data,
628 (char *) ccf->pid.data)
629 != NGX_OK)
630 {
631 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
632 ngx_rename_file_n " %s back to %s failed "
633 "after the new binary process \"%s\" exited",
634 ccf->oldpid.data, ccf->pid.data, ngx_argv[0]);
635 }
636
637 ngx_new_binary = 0;
638 if (ngx_noaccepting) {
639 ngx_restart = 1;
640 ngx_noaccepting = 0;
641 }
642 }
643
644 if (i == ngx_last_process - 1) {
645 ngx_last_process--;
646
647 } else {
648 ngx_processes[i].pid = -1;
649 }
650
651 } else if (ngx_processes[i].exiting || !ngx_processes[i].detached) {
652 live = 1;
653 }
654 }
655
656 return live;
657 }
658
659
660 static void
661 ngx_master_process_exit(ngx_cycle_t *cycle)
662 {
663 ngx_uint_t i;
664
665 ngx_delete_pidfile(cycle);
666
667 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exit");
668
669 for (i = 0; ngx_modules[i]; i++) {
670 if (ngx_modules[i]->exit_master) {
671 ngx_modules[i]->exit_master(cycle);
672 }
673 }
674
675 /*
676 * Copy ngx_cycle->log related data to the special static exit cycle,
677 * log, and log file structures enough to allow a signal handler to log.
678 * The handler may be called when standard ngx_cycle->log allocated from
679 * ngx_cycle->pool is already destroyed.
680 */
681
682 ngx_exit_log_file.fd = ngx_cycle->log->file->fd;
683
684 ngx_exit_log = *ngx_cycle->log;
685 ngx_exit_log.file = &ngx_exit_log_file;
686
687 ngx_exit_cycle.log = &ngx_exit_log;
688 ngx_cycle = &ngx_exit_cycle;
689
690 ngx_destroy_pool(cycle->pool);
691
692 exit(0);
693 }
694
695
696 static void
697 ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data)
698 {
699 ngx_uint_t i;
700 ngx_connection_t *c;
701
702 ngx_worker_process_init(cycle, 1);
703
704 ngx_setproctitle("worker process");
705
706 #if (NGX_THREADS)
707 {
708 ngx_int_t n;
709 ngx_err_t err;
710 ngx_core_conf_t *ccf;
711
712 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
713
714 if (ngx_threads_n) {
715 if (ngx_init_threads(ngx_threads_n, ccf->thread_stack_size, cycle)
716 == NGX_ERROR)
717 {
718 /* fatal */
719 exit(2);
720 }
721
722 err = ngx_thread_key_create(&ngx_core_tls_key);
723 if (err != 0) {
724 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
725 ngx_thread_key_create_n " failed");
726 /* fatal */
727 exit(2);
728 }
729
730 for (n = 0; n < ngx_threads_n; n++) {
731
732 ngx_threads[n].cv = ngx_cond_init(cycle->log);
733
734 if (ngx_threads[n].cv == NULL) {
735 /* fatal */
736 exit(2);
737 }
738
739 if (ngx_create_thread((ngx_tid_t *) &ngx_threads[n].tid,
740 ngx_worker_thread_cycle,
741 (void *) &ngx_threads[n], cycle->log)
742 != 0)
743 {
744 /* fatal */
745 exit(2);
746 }
747 }
748 }
749 }
750 #endif
751
752 for ( ;; ) {
753
754 if (ngx_exiting) {
755
756 c = cycle->connections;
757
758 for (i = 0; i < cycle->connection_n; i++) {
759
760 /* THREAD: lock */
761
762 if (c[i].fd != -1 && c[i].idle) {
763 c[i].close = 1;
764 c[i].read->handler(c[i].read);
765 }
766 }
767
768 if (ngx_event_timer_rbtree.root == ngx_event_timer_rbtree.sentinel)
769 {
770 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
771
772 ngx_worker_process_exit(cycle);
773 }
774 }
775
776 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
777
778 ngx_process_events_and_timers(cycle);
779
780 if (ngx_terminate) {
781 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
782
783 ngx_worker_process_exit(cycle);
784 }
785
786 if (ngx_quit) {
787 ngx_quit = 0;
788 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
789 "gracefully shutting down");
790 ngx_setproctitle("worker process is shutting down");
791
792 if (!ngx_exiting) {
793 ngx_close_listening_sockets(cycle);
794 ngx_exiting = 1;
795 }
796 }
797
798 if (ngx_reopen) {
799 ngx_reopen = 0;
800 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
801 ngx_reopen_files(cycle, -1);
802 }
803 }
804 }
805
806
807 static void
808 ngx_worker_process_init(ngx_cycle_t *cycle, ngx_uint_t priority)
809 {
810 sigset_t set;
811 ngx_int_t n;
812 ngx_uint_t i;
813 struct rlimit rlmt;
814 ngx_core_conf_t *ccf;
815 ngx_listening_t *ls;
816
817 ngx_process = NGX_PROCESS_WORKER;
818
819 if (ngx_set_environment(cycle, NULL) == NULL) {
820 /* fatal */
821 exit(2);
822 }
823
824 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
825
826 if (priority && ccf->priority != 0) {
827 if (setpriority(PRIO_PROCESS, 0, ccf->priority) == -1) {
828 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
829 "setpriority(%d) failed", ccf->priority);
830 }
831 }
832
833 if (ccf->rlimit_nofile != NGX_CONF_UNSET) {
834 rlmt.rlim_cur = (rlim_t) ccf->rlimit_nofile;
835 rlmt.rlim_max = (rlim_t) ccf->rlimit_nofile;
836
837 if (setrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
838 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
839 "setrlimit(RLIMIT_NOFILE, %i) failed",
840 ccf->rlimit_nofile);
841 }
842 }
843
844 if (ccf->rlimit_core != NGX_CONF_UNSET_SIZE) {
845 rlmt.rlim_cur = (rlim_t) ccf->rlimit_core;
846 rlmt.rlim_max = (rlim_t) ccf->rlimit_core;
847
848 if (setrlimit(RLIMIT_CORE, &rlmt) == -1) {
849 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
850 "setrlimit(RLIMIT_CORE, %i) failed",
851 ccf->rlimit_core);
852 }
853 }
854
855 #ifdef RLIMIT_SIGPENDING
856 if (ccf->rlimit_sigpending != NGX_CONF_UNSET) {
857 rlmt.rlim_cur = (rlim_t) ccf->rlimit_sigpending;
858 rlmt.rlim_max = (rlim_t) ccf->rlimit_sigpending;
859
860 if (setrlimit(RLIMIT_SIGPENDING, &rlmt) == -1) {
861 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
862 "setrlimit(RLIMIT_SIGPENDING, %i) failed",
863 ccf->rlimit_sigpending);
864 }
865 }
866 #endif
867
868 #ifdef NGX_HAVE_CAPABILITIES
869 if (ccf->use_bind_capability && ngx_clear_capability(cycle->log) != NGX_OK) {
870 exit(2);
871 }
872 #endif
873
874 if (ngx_switch_user(cycle) == NGX_ERROR) {
875 exit(2);
876 }
877
878 #if (NGX_HAVE_SCHED_SETAFFINITY)
879
880 if (cpu_affinity) {
881 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
882 "sched_setaffinity(0x%08Xl)", cpu_affinity);
883
884 if (sched_setaffinity(0, 32, (cpu_set_t *) &cpu_affinity) == -1) {
885 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
886 "sched_setaffinity(0x%08Xl) failed", cpu_affinity);
887 }
888 }
889
890 #endif
891
892 #if (NGX_HAVE_PR_SET_DUMPABLE)
893
894 /* allow coredump after setuid() in Linux 2.4.x */
895
896 if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) {
897 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
898 "prctl(PR_SET_DUMPABLE) failed");
899 }
900
901 #endif
902
903 if (ccf->working_directory.len) {
904 if (chdir((char *) ccf->working_directory.data) == -1) {
905 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
906 "chdir(\"%s\") failed", ccf->working_directory.data);
907 /* fatal */
908 exit(2);
909 }
910 }
911
912 sigemptyset(&set);
913
914 if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) {
915 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
916 "sigprocmask() failed");
917 }
918
919 /*
920 * disable deleting previous events for the listening sockets because
921 * in the worker processes there are no events at all at this point
922 */
923 ls = cycle->listening.elts;
924 for (i = 0; i < cycle->listening.nelts; i++) {
925 ls[i].previous = NULL;
926 }
927
928 for (i = 0; ngx_modules[i]; i++) {
929 if (ngx_modules[i]->init_process) {
930 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
931 /* fatal */
932 exit(2);
933 }
934 }
935 }
936
937 for (n = 0; n < ngx_last_process; n++) {
938
939 if (ngx_processes[n].pid == -1) {
940 continue;
941 }
942
943 if (n == ngx_process_slot) {
944 continue;
945 }
946
947 if (ngx_processes[n].channel[1] == -1) {
948 continue;
949 }
950
951 if (close(ngx_processes[n].channel[1]) == -1) {
952 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
953 "close() channel failed");
954 }
955 }
956
957 if (close(ngx_processes[ngx_process_slot].channel[0]) == -1) {
958 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
959 "close() channel failed");
960 }
961
962 #if 0
963 ngx_last_process = 0;
964 #endif
965
966 if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT,
967 ngx_channel_handler)
968 == NGX_ERROR)
969 {
970 /* fatal */
971 exit(2);
972 }
973 }
974
975
976 static void
977 ngx_worker_process_exit(ngx_cycle_t *cycle)
978 {
979 ngx_uint_t i;
980 ngx_connection_t *c;
981
982 #if (NGX_THREADS)
983 ngx_terminate = 1;
984
985 ngx_wakeup_worker_threads(cycle);
986 #endif
987
988 for (i = 0; ngx_modules[i]; i++) {
989 if (ngx_modules[i]->exit_process) {
990 ngx_modules[i]->exit_process(cycle);
991 }
992 }
993
994 if (ngx_exiting) {
995 c = cycle->connections;
996 for (i = 0; i < cycle->connection_n; i++) {
997 if (c[i].fd != -1
998 && c[i].read
999 && !c[i].read->accept
1000 && !c[i].read->channel
1001 && !c[i].read->resolver)
1002 {
1003 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
1004 "open socket #%d left in connection %ui",
1005 c[i].fd, i);
1006 ngx_debug_quit = 1;
1007 }
1008 }
1009
1010 if (ngx_debug_quit) {
1011 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "aborting");
1012 ngx_debug_point();
1013 }
1014 }
1015
1016 /*
1017 * Copy ngx_cycle->log related data to the special static exit cycle,
1018 * log, and log file structures enough to allow a signal handler to log.
1019 * The handler may be called when standard ngx_cycle->log allocated from
1020 * ngx_cycle->pool is already destroyed.
1021 */
1022
1023 ngx_exit_log_file.fd = ngx_cycle->log->file->fd;
1024
1025 ngx_exit_log = *ngx_cycle->log;
1026 ngx_exit_log.file = &ngx_exit_log_file;
1027
1028 ngx_exit_cycle.log = &ngx_exit_log;
1029 ngx_cycle = &ngx_exit_cycle;
1030
1031 ngx_destroy_pool(cycle->pool);
1032
1033 ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, "exit");
1034
1035 exit(0);
1036 }
1037
1038
1039 static void
1040 ngx_channel_handler(ngx_event_t *ev)
1041 {
1042 ngx_int_t n;
1043 ngx_channel_t ch;
1044 ngx_connection_t *c;
1045
1046 if (ev->timedout) {
1047 ev->timedout = 0;
1048 return;
1049 }
1050
1051 c = ev->data;
1052
1053 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler");
1054
1055 for ( ;; ) {
1056
1057 n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log);
1058
1059 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %i", n);
1060
1061 if (n == NGX_ERROR) {
1062
1063 if (ngx_event_flags & NGX_USE_EPOLL_EVENT) {
1064 ngx_del_conn(c, 0);
1065 }
1066
1067 ngx_close_connection(c);
1068 return;
1069 }
1070
1071 if (ngx_event_flags & NGX_USE_EVENTPORT_EVENT) {
1072 if (ngx_add_event(ev, NGX_READ_EVENT, 0) == NGX_ERROR) {
1073 return;
1074 }
1075 }
1076
1077 if (n == NGX_AGAIN) {
1078 return;
1079 }
1080
1081 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0,
1082 "channel command: %d", ch.command);
1083
1084 switch (ch.command) {
1085
1086 case NGX_CMD_QUIT:
1087 ngx_quit = 1;
1088 break;
1089
1090 case NGX_CMD_TERMINATE:
1091 ngx_terminate = 1;
1092 break;
1093
1094 case NGX_CMD_REOPEN:
1095 ngx_reopen = 1;
1096 break;
1097
1098 case NGX_CMD_OPEN_CHANNEL:
1099
1100 ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0,
1101 "get channel s:%i pid:%P fd:%d",
1102 ch.slot, ch.pid, ch.fd);
1103
1104 ngx_processes[ch.slot].pid = ch.pid;
1105 ngx_processes[ch.slot].channel[0] = ch.fd;
1106 break;
1107
1108 case NGX_CMD_CLOSE_CHANNEL:
1109
1110 ngx_log_debug4(NGX_LOG_DEBUG_CORE, ev->log, 0,
1111 "close channel s:%i pid:%P our:%P fd:%d",
1112 ch.slot, ch.pid, ngx_processes[ch.slot].pid,
1113 ngx_processes[ch.slot].channel[0]);
1114
1115 if (close(ngx_processes[ch.slot].channel[0]) == -1) {
1116 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
1117 "close() channel failed");
1118 }
1119
1120 ngx_processes[ch.slot].channel[0] = -1;
1121 break;
1122 }
1123 }
1124 }
1125
1126
1127 #if (NGX_THREADS)
1128
1129 static void
1130 ngx_wakeup_worker_threads(ngx_cycle_t *cycle)
1131 {
1132 ngx_int_t i;
1133 ngx_uint_t live;
1134
1135 for ( ;; ) {
1136
1137 live = 0;
1138
1139 for (i = 0; i < ngx_threads_n; i++) {
1140 if (ngx_threads[i].state < NGX_THREAD_EXIT) {
1141 if (ngx_cond_signal(ngx_threads[i].cv) == NGX_ERROR) {
1142 ngx_threads[i].state = NGX_THREAD_DONE;
1143
1144 } else {
1145 live = 1;
1146 }
1147 }
1148
1149 if (ngx_threads[i].state == NGX_THREAD_EXIT) {
1150 ngx_thread_join(ngx_threads[i].tid, NULL);
1151 ngx_threads[i].state = NGX_THREAD_DONE;
1152 }
1153 }
1154
1155 if (live == 0) {
1156 ngx_log_debug0(NGX_LOG_DEBUG_CORE, cycle->log, 0,
1157 "all worker threads are joined");
1158
1159 /* STUB */
1160 ngx_done_events(cycle);
1161 ngx_mutex_destroy(ngx_event_timer_mutex);
1162 ngx_mutex_destroy(ngx_posted_events_mutex);
1163
1164 return;
1165 }
1166
1167 ngx_sched_yield();
1168 }
1169 }
1170
1171
1172 static ngx_thread_value_t
1173 ngx_worker_thread_cycle(void *data)
1174 {
1175 ngx_thread_t *thr = data;
1176
1177 sigset_t set;
1178 ngx_err_t err;
1179 ngx_core_tls_t *tls;
1180 ngx_cycle_t *cycle;
1181
1182 cycle = (ngx_cycle_t *) ngx_cycle;
1183
1184 sigemptyset(&set);
1185 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
1186 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
1187 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
1188
1189 err = ngx_thread_sigmask(SIG_BLOCK, &set, NULL);
1190 if (err) {
1191 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
1192 ngx_thread_sigmask_n " failed");
1193 return (ngx_thread_value_t) 1;
1194 }
1195
1196 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
1197 "thread " NGX_TID_T_FMT " started", ngx_thread_self());
1198
1199 ngx_setthrtitle("worker thread");
1200
1201 tls = ngx_calloc(sizeof(ngx_core_tls_t), cycle->log);
1202 if (tls == NULL) {
1203 return (ngx_thread_value_t) 1;
1204 }
1205
1206 err = ngx_thread_set_tls(ngx_core_tls_key, tls);
1207 if (err != 0) {
1208 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
1209 ngx_thread_set_tls_n " failed");
1210 return (ngx_thread_value_t) 1;
1211 }
1212
1213 ngx_mutex_lock(ngx_posted_events_mutex);
1214
1215 for ( ;; ) {
1216 thr->state = NGX_THREAD_FREE;
1217
1218 if (ngx_cond_wait(thr->cv, ngx_posted_events_mutex) == NGX_ERROR) {
1219 return (ngx_thread_value_t) 1;
1220 }
1221
1222 if (ngx_terminate) {
1223 thr->state = NGX_THREAD_EXIT;
1224
1225 ngx_mutex_unlock(ngx_posted_events_mutex);
1226
1227 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
1228 "thread " NGX_TID_T_FMT " is done",
1229 ngx_thread_self());
1230
1231 return (ngx_thread_value_t) 0;
1232 }
1233
1234 thr->state = NGX_THREAD_BUSY;
1235
1236 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
1237 return (ngx_thread_value_t) 1;
1238 }
1239
1240 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
1241 return (ngx_thread_value_t) 1;
1242 }
1243
1244 if (ngx_process_changes) {
1245 if (ngx_process_changes(cycle, 1) == NGX_ERROR) {
1246 return (ngx_thread_value_t) 1;
1247 }
1248 }
1249 }
1250 }
1251
1252 #endif
1253
1254
1255 static void
1256 ngx_cache_manager_process_cycle(ngx_cycle_t *cycle, void *data)
1257 {
1258 ngx_cache_manager_ctx_t *ctx = data;
1259
1260 void *ident[4];
1261 ngx_event_t ev;
1262
1263 cycle->connection_n = 512;
1264
1265 ngx_worker_process_init(cycle, 0);
1266
1267 ngx_close_listening_sockets(cycle);
1268
1269 ngx_memzero(&ev, sizeof(ngx_event_t));
1270 ev.handler = ctx->handler;
1271 ev.data = ident;
1272 ev.log = cycle->log;
1273 ident[3] = (void *) -1;
1274
1275 ngx_use_accept_mutex = 0;
1276
1277 ngx_setproctitle(ctx->name);
1278
1279 ngx_add_timer(&ev, ctx->delay);
1280
1281 for ( ;; ) {
1282
1283 if (ngx_terminate || ngx_quit) {
1284 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
1285 exit(0);
1286 }
1287
1288 if (ngx_reopen) {
1289 ngx_reopen = 0;
1290 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
1291 ngx_reopen_files(cycle, -1);
1292 }
1293
1294 ngx_process_events_and_timers(cycle);
1295 }
1296 }
1297
1298
1299 static void
1300 ngx_cache_manager_process_handler(ngx_event_t *ev)
1301 {
1302 time_t next, n;
1303 ngx_uint_t i;
1304 ngx_path_t **path;
1305
1306 next = 60 * 60;
1307
1308 path = ngx_cycle->pathes.elts;
1309 for (i = 0; i < ngx_cycle->pathes.nelts; i++) {
1310
1311 if (path[i]->manager) {
1312 n = path[i]->manager(path[i]->data);
1313
1314 next = (n <= next) ? n : next;
1315
1316 ngx_time_update(0, 0);
1317 }
1318 }
1319
1320 if (next == 0) {
1321 next = 1;
1322 }
1323
1324 ngx_add_timer(ev, next * 1000);
1325 }
1326
1327
1328 static void
1329 ngx_cache_loader_process_handler(ngx_event_t *ev)
1330 {
1331 ngx_uint_t i;
1332 ngx_path_t **path;
1333 ngx_cycle_t *cycle;
1334
1335 cycle = (ngx_cycle_t *) ngx_cycle;
1336
1337 path = cycle->pathes.elts;
1338 for (i = 0; i < cycle->pathes.nelts; i++) {
1339
1340 if (ngx_terminate || ngx_quit) {
1341 break;
1342 }
1343
1344 if (path[i]->loader) {
1345 path[i]->loader(path[i]->data);
1346 ngx_time_update(0, 0);
1347 }
1348 }
1349
1350 exit(0);
1351 }
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