Fix a symbol not found problem by not including madt.c in the ACPI module.
[dragonfly.git] / sys / kern / kern_shutdown.c
CommitLineData
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1/*-
2 * Copyright (c) 1986, 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)kern_shutdown.c 8.3 (Berkeley) 1/21/94
39 * $FreeBSD: src/sys/kern/kern_shutdown.c,v 1.72.2.12 2002/02/21 19:15:10 dillon Exp $
ddcc5e10 40 * $DragonFly: src/sys/kern/kern_shutdown.c,v 1.22 2005/07/19 19:53:53 dillon Exp $
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41 */
42
43#include "opt_ddb.h"
b1e04573 44#include "opt_ddb_trace.h"
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45#include "opt_hw_wdog.h"
46#include "opt_panic.h"
47#include "opt_show_busybufs.h"
48
49#include <sys/param.h>
50#include <sys/systm.h>
51#include <sys/eventhandler.h>
52#include <sys/buf.h>
53#include <sys/disklabel.h>
54#include <sys/reboot.h>
55#include <sys/proc.h>
56#include <sys/vnode.h>
57#include <sys/kernel.h>
58#include <sys/kthread.h>
59#include <sys/malloc.h>
60#include <sys/mount.h>
61#include <sys/queue.h>
62#include <sys/sysctl.h>
63#include <sys/conf.h>
64#include <sys/sysproto.h>
335dda38 65#include <sys/device.h>
984263bc 66#include <sys/cons.h>
9ec81f83 67#include <sys/thread2.h>
3020e3be 68#include <sys/buf2.h>
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69
70#include <machine/pcb.h>
71#include <machine/clock.h>
72#include <machine/md_var.h>
0f7a3396 73#include <machine/smp.h> /* smp_active_mask, cpuid */
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74
75#include <sys/signalvar.h>
76
77#ifndef PANIC_REBOOT_WAIT_TIME
78#define PANIC_REBOOT_WAIT_TIME 15 /* default to 15 seconds */
79#endif
80
81/*
82 * Note that stdarg.h and the ANSI style va_start macro is used for both
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83 * ANSI and traditional C compilers. We use the machine version to stay
84 * within the confines of the kernel header files.
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85 */
86#include <machine/stdarg.h>
87
88#ifdef DDB
89#ifdef DDB_UNATTENDED
90int debugger_on_panic = 0;
91#else
92int debugger_on_panic = 1;
93#endif
94SYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW,
95 &debugger_on_panic, 0, "Run debugger on kernel panic");
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96
97extern void db_print_backtrace(void);
98
99#ifdef DDB_TRACE
100int trace_on_panic = 1;
101#else
102int trace_on_panic = 0;
103#endif
104SYSCTL_INT(_debug, OID_AUTO, trace_on_panic, CTLFLAG_RW,
105 &trace_on_panic, 0, "Print stack trace on kernel panic");
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106#endif
107
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108static int sync_on_panic = 1;
109SYSCTL_INT(_kern, OID_AUTO, sync_on_panic, CTLFLAG_RW,
110 &sync_on_panic, 0, "Do a sync before rebooting from a panic");
111
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112SYSCTL_NODE(_kern, OID_AUTO, shutdown, CTLFLAG_RW, 0, "Shutdown environment");
113
114#ifdef HW_WDOG
115/*
116 * If there is a hardware watchdog, point this at the function needed to
117 * hold it off.
118 * It's needed when the kernel needs to do some lengthy operations.
119 * e.g. in wd.c when dumping core.. It's most annoying to have
120 * your precious core-dump only half written because the wdog kicked in.
121 */
122watchdog_tickle_fn wdog_tickler = NULL;
123#endif /* HW_WDOG */
124
125/*
126 * Variable panicstr contains argument to first call to panic; used as flag
127 * to indicate that the kernel has already called panic.
128 */
129const char *panicstr;
130
131int dumping; /* system is dumping */
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132#ifdef SMP
133u_int panic_cpu_interlock; /* panic interlock */
134globaldata_t panic_cpu_gd; /* which cpu took the panic */
135#endif
984263bc 136
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137static void boot (int) __dead2;
138static void dumpsys (void);
139static int setdumpdev (dev_t dev);
140static void poweroff_wait (void *, int);
141static void print_uptime (void);
142static void shutdown_halt (void *junk, int howto);
143static void shutdown_panic (void *junk, int howto);
144static void shutdown_reset (void *junk, int howto);
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145
146/* register various local shutdown events */
147static void
148shutdown_conf(void *unused)
149{
150 EVENTHANDLER_REGISTER(shutdown_final, poweroff_wait, NULL, SHUTDOWN_PRI_FIRST);
151 EVENTHANDLER_REGISTER(shutdown_final, shutdown_halt, NULL, SHUTDOWN_PRI_LAST + 100);
152 EVENTHANDLER_REGISTER(shutdown_final, shutdown_panic, NULL, SHUTDOWN_PRI_LAST + 100);
153 EVENTHANDLER_REGISTER(shutdown_final, shutdown_reset, NULL, SHUTDOWN_PRI_LAST + 200);
154}
155
156SYSINIT(shutdown_conf, SI_SUB_INTRINSIC, SI_ORDER_ANY, shutdown_conf, NULL)
157
158/* ARGSUSED */
159
160/*
161 * The system call that results in a reboot
162 */
163int
41c20dac 164reboot(struct reboot_args *uap)
984263bc 165{
dadab5e9 166 struct thread *td = curthread;
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167 int error;
168
dadab5e9 169 if ((error = suser(td)))
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170 return (error);
171
172 boot(uap->opt);
173 return (0);
174}
175
176/*
177 * Called by events that want to shut down.. e.g <CTL><ALT><DEL> on a PC
178 */
179static int shutdown_howto = 0;
180
181void
182shutdown_nice(int howto)
183{
184 shutdown_howto = howto;
185
186 /* Send a signal to init(8) and have it shutdown the world */
187 if (initproc != NULL) {
188 psignal(initproc, SIGINT);
189 } else {
190 /* No init(8) running, so simply reboot */
191 boot(RB_NOSYNC);
192 }
193 return;
194}
195static int waittime = -1;
196static struct pcb dumppcb;
197
198static void
199print_uptime()
200{
201 int f;
202 struct timespec ts;
203
204 getnanouptime(&ts);
205 printf("Uptime: ");
206 f = 0;
207 if (ts.tv_sec >= 86400) {
208 printf("%ldd", ts.tv_sec / 86400);
209 ts.tv_sec %= 86400;
210 f = 1;
211 }
212 if (f || ts.tv_sec >= 3600) {
213 printf("%ldh", ts.tv_sec / 3600);
214 ts.tv_sec %= 3600;
215 f = 1;
216 }
217 if (f || ts.tv_sec >= 60) {
218 printf("%ldm", ts.tv_sec / 60);
219 ts.tv_sec %= 60;
220 f = 1;
221 }
222 printf("%lds\n", ts.tv_sec);
223}
224
225/*
226 * Go through the rigmarole of shutting down..
227 * this used to be in machdep.c but I'll be dammned if I could see
228 * anything machine dependant in it.
229 */
230static void
41c20dac 231boot(int howto)
984263bc 232{
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233 /*
234 * Get rid of any user scheduler baggage and then give
235 * us a high priority.
236 */
237 if (curthread->td_release)
238 curthread->td_release(curthread);
239 lwkt_setpri_self(TDPRI_MAX);
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240
241 /* collect extra flags that shutdown_nice might have set */
242 howto |= shutdown_howto;
243
244#ifdef SMP
0f7a3396 245 if (smp_active_mask > 1) {
72740893 246 printf("boot() called on cpu#%d\n", mycpu->gd_cpuid);
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247 }
248#endif
249 /*
250 * Do any callouts that should be done BEFORE syncing the filesystems.
251 */
252 EVENTHANDLER_INVOKE(shutdown_pre_sync, howto);
253
254 /*
255 * Now sync filesystems
256 */
257 if (!cold && (howto & RB_NOSYNC) == 0 && waittime < 0) {
1fd87d54 258 struct buf *bp;
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259 int iter, nbusy, pbusy;
260
261 waittime = 0;
262 printf("\nsyncing disks... ");
263
41c20dac 264 sync(NULL); /* YYY was sync(&proc0, NULL). why proc0 ? */
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265
266 /*
267 * With soft updates, some buffers that are
268 * written will be remarked as dirty until other
269 * buffers are written.
270 */
271 for (iter = pbusy = 0; iter < 20; iter++) {
272 nbusy = 0;
273 for (bp = &buf[nbuf]; --bp >= buf; ) {
274 if ((bp->b_flags & B_INVAL) == 0 &&
275 BUF_REFCNT(bp) > 0) {
276 nbusy++;
277 } else if ((bp->b_flags & (B_DELWRI | B_INVAL))
278 == B_DELWRI) {
279 /* bawrite(bp);*/
280 nbusy++;
281 }
282 }
283 if (nbusy == 0)
284 break;
285 printf("%d ", nbusy);
286 if (nbusy < pbusy)
287 iter = 0;
288 pbusy = nbusy;
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289 /*
290 * XXX:
291 * Process soft update work queue if buffers don't sync
292 * after 6 iterations by permitting the syncer to run.
293 */
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294 if (iter > 5 && bioops.io_sync)
295 (*bioops.io_sync)(NULL);
41c20dac 296 sync(NULL); /* YYY was sync(&proc0, NULL). why proc0 ? */
3ad8cc28 297 tsleep(boot, 0, "shutdn", hz * iter / 20 + 1);
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298 }
299 printf("\n");
300 /*
301 * Count only busy local buffers to prevent forcing
302 * a fsck if we're just a client of a wedged NFS server
303 */
304 nbusy = 0;
305 for (bp = &buf[nbuf]; --bp >= buf; ) {
306 if (((bp->b_flags&B_INVAL) == 0 && BUF_REFCNT(bp)) ||
307 ((bp->b_flags & (B_DELWRI|B_INVAL)) == B_DELWRI)) {
308 if (bp->b_dev == NODEV) {
861905fb 309 mountlist_remove(bp->b_vp->v_mount);
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310 continue;
311 }
312 nbusy++;
313#if defined(SHOW_BUSYBUFS) || defined(DIAGNOSTIC)
314 printf(
315 "%p %d: dev:%s, flags:%08lx, blkno:%ld, lblkno:%ld\n",
316 bp, nbusy, devtoname(bp->b_dev),
317 bp->b_flags, (long)bp->b_blkno,
318 (long)bp->b_lblkno);
319#endif
320 }
321 }
322 if (nbusy) {
323 /*
324 * Failed to sync all blocks. Indicate this and don't
325 * unmount filesystems (thus forcing an fsck on reboot).
326 */
327 printf("giving up on %d buffers\n", nbusy);
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328#ifdef DDB
329 Debugger("busy buffer problem");
330#endif /* DDB */
3ad8cc28 331 tsleep(boot, 0, "shutdn", hz * 5 + 1);
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332 } else {
333 printf("done\n");
334 /*
335 * Unmount filesystems
336 */
337 if (panicstr == 0)
338 vfs_unmountall();
339 }
3ad8cc28 340 tsleep(boot, 0, "shutdn", hz / 10 + 1);
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341 }
342
343 print_uptime();
344
345 /*
346 * Ok, now do things that assume all filesystem activity has
347 * been completed.
348 */
349 EVENTHANDLER_INVOKE(shutdown_post_sync, howto);
9ec81f83 350 crit_enter();
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351 if ((howto & (RB_HALT|RB_DUMP)) == RB_DUMP && !cold)
352 dumpsys();
353
354 /* Now that we're going to really halt the system... */
355 EVENTHANDLER_INVOKE(shutdown_final, howto);
356
357 for(;;) ; /* safety against shutdown_reset not working */
358 /* NOTREACHED */
359}
360
361/*
362 * If the shutdown was a clean halt, behave accordingly.
363 */
364static void
365shutdown_halt(void *junk, int howto)
366{
367 if (howto & RB_HALT) {
368 printf("\n");
369 printf("The operating system has halted.\n");
370 printf("Please press any key to reboot.\n\n");
371 switch (cngetc()) {
372 case -1: /* No console, just die */
373 cpu_halt();
374 /* NOTREACHED */
375 default:
376 howto &= ~RB_HALT;
377 break;
378 }
379 }
380}
381
382/*
383 * Check to see if the system paniced, pause and then reboot
384 * according to the specified delay.
385 */
386static void
387shutdown_panic(void *junk, int howto)
388{
389 int loop;
390
391 if (howto & RB_DUMP) {
392 if (PANIC_REBOOT_WAIT_TIME != 0) {
393 if (PANIC_REBOOT_WAIT_TIME != -1) {
394 printf("Automatic reboot in %d seconds - "
395 "press a key on the console to abort\n",
396 PANIC_REBOOT_WAIT_TIME);
397 for (loop = PANIC_REBOOT_WAIT_TIME * 10;
398 loop > 0; --loop) {
399 DELAY(1000 * 100); /* 1/10th second */
400 /* Did user type a key? */
401 if (cncheckc() != -1)
402 break;
403 }
404 if (!loop)
405 return;
406 }
407 } else { /* zero time specified - reboot NOW */
408 return;
409 }
410 printf("--> Press a key on the console to reboot,\n");
411 printf("--> or switch off the system now.\n");
412 cngetc();
413 }
414}
415
416/*
417 * Everything done, now reset
418 */
419static void
420shutdown_reset(void *junk, int howto)
421{
422 printf("Rebooting...\n");
423 DELAY(1000000); /* wait 1 sec for printf's to complete and be read */
424 /* cpu_boot(howto); */ /* doesn't do anything at the moment */
425 cpu_reset();
426 /* NOTREACHED */ /* assuming reset worked */
427}
428
429/*
430 * Magic number for savecore
431 *
432 * exported (symorder) and used at least by savecore(8)
433 *
434 */
435static u_long const dumpmag = 0x8fca0101UL;
436
437static int dumpsize = 0; /* also for savecore */
438
439static int dodump = 1;
440
441SYSCTL_INT(_machdep, OID_AUTO, do_dump, CTLFLAG_RW, &dodump, 0,
442 "Try to perform coredump on kernel panic");
443
444static int
445setdumpdev(dev)
446 dev_t dev;
447{
448 int psize;
449 long newdumplo;
450
451 if (dev == NODEV) {
452 dumpdev = dev;
453 return (0);
454 }
335dda38 455 psize = dev_dpsize(dev);
984263bc 456 if (psize == -1)
335dda38 457 return (ENXIO);
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458 /*
459 * XXX should clean up checking in dumpsys() to be more like this.
460 */
461 newdumplo = psize - Maxmem * (PAGE_SIZE / DEV_BSIZE);
462 if (newdumplo <= LABELSECTOR)
463 return (ENOSPC);
464 dumpdev = dev;
465 dumplo = newdumplo;
466 return (0);
467}
468
469
470/* ARGSUSED */
402ed7e1 471static void dump_conf (void *dummy);
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472static void
473dump_conf(dummy)
474 void *dummy;
475{
476 char *path;
477 dev_t dev;
478
479 path = malloc(MNAMELEN, M_TEMP, M_WAITOK);
480 if (TUNABLE_STR_FETCH("dumpdev", path, MNAMELEN) != 0) {
481 dev = getdiskbyname(path);
482 if (dev != NODEV)
483 dumpdev = dev;
484 }
485 free(path, M_TEMP);
486 if (setdumpdev(dumpdev) != 0)
487 dumpdev = NODEV;
488}
489
490SYSINIT(dump_conf, SI_SUB_DUMP_CONF, SI_ORDER_FIRST, dump_conf, NULL)
491
492static int
493sysctl_kern_dumpdev(SYSCTL_HANDLER_ARGS)
494{
495 int error;
496 udev_t ndumpdev;
497
498 ndumpdev = dev2udev(dumpdev);
499 error = sysctl_handle_opaque(oidp, &ndumpdev, sizeof ndumpdev, req);
500 if (error == 0 && req->newptr != NULL)
501 error = setdumpdev(udev2dev(ndumpdev, 0));
502 return (error);
503}
504
505SYSCTL_PROC(_kern, KERN_DUMPDEV, dumpdev, CTLTYPE_OPAQUE|CTLFLAG_RW,
506 0, sizeof dumpdev, sysctl_kern_dumpdev, "T,dev_t", "");
507
508/*
509 * Doadump comes here after turning off memory management and
510 * getting on the dump stack, either when called above, or by
511 * the auto-restart code.
512 */
513static void
514dumpsys(void)
515{
516 int error;
517
518 savectx(&dumppcb);
519 if (dumping++) {
520 printf("Dump already in progress, bailing...\n");
521 return;
522 }
523 if (!dodump)
524 return;
525 if (dumpdev == NODEV)
526 return;
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527 dumpsize = Maxmem;
528 printf("\ndumping to dev %s, offset %ld\n", devtoname(dumpdev), dumplo);
529 printf("dump ");
335dda38 530 error = dev_ddump(dumpdev);
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531 if (error == 0) {
532 printf("succeeded\n");
533 return;
534 }
535 printf("failed, reason: ");
536 switch (error) {
335dda38 537 case ENOSYS:
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538 case ENODEV:
539 printf("device doesn't support a dump routine\n");
540 break;
541
542 case ENXIO:
543 printf("device bad\n");
544 break;
545
546 case EFAULT:
547 printf("device not ready\n");
548 break;
549
550 case EINVAL:
551 printf("area improper\n");
552 break;
553
554 case EIO:
555 printf("i/o error\n");
556 break;
557
558 case EINTR:
559 printf("aborted from console\n");
560 break;
561
562 default:
563 printf("unknown, error = %d\n", error);
564 break;
565 }
566}
567
568int
569dumpstatus(vm_offset_t addr, off_t count)
570{
571 int c;
572
573 if (addr % (1024 * 1024) == 0) {
574#ifdef HW_WDOG
575 if (wdog_tickler)
576 (*wdog_tickler)();
577#endif
578 printf("%ld ", (long)(count / (1024 * 1024)));
579 }
580
581 if ((c = cncheckc()) == 0x03)
582 return -1;
583 else if (c != -1)
584 printf("[CTRL-C to abort] ");
585
586 return 0;
587}
588
589/*
590 * Panic is called on unresolvable fatal errors. It prints "panic: mesg",
591 * and then reboots. If we are called twice, then we avoid trying to sync
592 * the disks as this often leads to recursive panics.
593 */
594void
595panic(const char *fmt, ...)
596{
b1e04573 597 int bootopt, newpanic;
e2565a42 598 __va_list ap;
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599 static char buf[256];
600
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601#ifdef SMP
602 /*
603 * If a panic occurs on multiple cpus before the first is able to
604 * halt the other cpus, only one cpu is allowed to take the panic.
605 * Attempt to be verbose about this situation but if the printf()
606 * itself panics don't let us overrun the kernel stack.
607 *
608 * Be very nasty about descheduling our thread at the lowest
609 * level possible in an attempt to freeze the thread without
610 * inducing further panics.
611 *
612 * Bumping gd_trap_nesting_level will also bypass assertions in
613 * lwkt_switch() and allow us to switch away even if we are a
614 * FAST interrupt or IPI.
615 */
616 if (atomic_poll_acquire_int(&panic_cpu_interlock)) {
617 panic_cpu_gd = mycpu;
618 } else if (panic_cpu_gd != mycpu) {
619 crit_enter();
620 ++mycpu->gd_trap_nesting_level;
621 if (mycpu->gd_trap_nesting_level < 25) {
622 printf("SECONDARY PANIC ON CPU %d THREAD %p\n",
623 mycpu->gd_cpuid, curthread);
624 }
625 curthread->td_release = NULL; /* be a grinch */
626 for (;;) {
627 lwkt_deschedule_self(curthread);
628 lwkt_switch();
629 }
630 /* NOT REACHED */
631 /* --mycpu->gd_trap_nesting_level */
632 /* crit_exit() */
633 }
634#endif
984263bc 635 bootopt = RB_AUTOBOOT | RB_DUMP;
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636 if (sync_on_panic == 0)
637 bootopt |= RB_NOSYNC;
b1e04573 638 newpanic = 0;
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639 if (panicstr)
640 bootopt |= RB_NOSYNC;
b1e04573 641 else {
984263bc 642 panicstr = fmt;
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JH
643 newpanic = 1;
644 }
984263bc 645
e2565a42 646 __va_start(ap, fmt);
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647 (void)vsnprintf(buf, sizeof(buf), fmt, ap);
648 if (panicstr == fmt)
649 panicstr = buf;
e2565a42 650 __va_end(ap);
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651 printf("panic: %s\n", buf);
652#ifdef SMP
7a44d1cb 653 /* three separate prints in case of an unmapped page and trap */
984263bc 654 printf("mp_lock = %08x; ", mp_lock);
72740893 655 printf("cpuid = %d; ", mycpu->gd_cpuid);
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656 printf("lapic.id = %08x\n", lapic.id);
657#endif
658
659#if defined(DDB)
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660 if (newpanic && trace_on_panic)
661 db_print_backtrace();
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662 if (debugger_on_panic)
663 Debugger ("panic");
664#endif
665 boot(bootopt);
666}
667
668/*
669 * Support for poweroff delay.
670 */
671#ifndef POWEROFF_DELAY
672# define POWEROFF_DELAY 5000
673#endif
674static int poweroff_delay = POWEROFF_DELAY;
675
676SYSCTL_INT(_kern_shutdown, OID_AUTO, poweroff_delay, CTLFLAG_RW,
677 &poweroff_delay, 0, "");
678
679static void
680poweroff_wait(void *junk, int howto)
681{
682 if(!(howto & RB_POWEROFF) || poweroff_delay <= 0)
683 return;
684 DELAY(poweroff_delay * 1000);
685}
686
687/*
688 * Some system processes (e.g. syncer) need to be stopped at appropriate
689 * points in their main loops prior to a system shutdown, so that they
690 * won't interfere with the shutdown process (e.g. by holding a disk buf
691 * to cause sync to fail). For each of these system processes, register
692 * shutdown_kproc() as a handler for one of shutdown events.
693 */
694static int kproc_shutdown_wait = 60;
695SYSCTL_INT(_kern_shutdown, OID_AUTO, kproc_shutdown_wait, CTLFLAG_RW,
696 &kproc_shutdown_wait, 0, "");
697
698void
699shutdown_kproc(void *arg, int howto)
700{
bc6dffab 701 struct thread *td;
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702 struct proc *p;
703 int error;
704
705 if (panicstr)
706 return;
707
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708 td = (struct thread *)arg;
709 if ((p = td->td_proc) != NULL) {
710 printf("Waiting (max %d seconds) for system process `%s' to stop...",
711 kproc_shutdown_wait, p->p_comm);
712 } else {
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713 printf("Waiting (max %d seconds) for system thread %s to stop...",
714 kproc_shutdown_wait, td->td_comm);
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715 }
716 error = suspend_kproc(td, kproc_shutdown_wait * hz);
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717
718 if (error == EWOULDBLOCK)
719 printf("timed out\n");
720 else
721 printf("stopped\n");
722}