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 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)kern_shutdown.c 8.3 (Berkeley) 1/21/94
35 */
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD: releng/8.3/sys/kern/kern_shutdown.c 225728 2011-09-22 11:07:11Z attilio $");
39
40 #include "opt_ddb.h"
41 #include "opt_kdb.h"
42 #include "opt_panic.h"
43 #include "opt_sched.h"
44 #include "opt_watchdog.h"
45
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/bio.h>
49 #include <sys/buf.h>
50 #include <sys/conf.h>
51 #include <sys/cons.h>
52 #include <sys/eventhandler.h>
53 #include <sys/jail.h>
54 #include <sys/kdb.h>
55 #include <sys/kernel.h>
56 #include <sys/kerneldump.h>
57 #include <sys/kthread.h>
58 #include <sys/malloc.h>
59 #include <sys/mount.h>
60 #include <sys/priv.h>
61 #include <sys/proc.h>
62 #include <sys/reboot.h>
63 #include <sys/resourcevar.h>
64 #include <sys/sched.h>
65 #include <sys/smp.h>
66 #include <sys/sysctl.h>
67 #include <sys/sysproto.h>
68 #include <sys/vnode.h>
69 #ifdef SW_WATCHDOG
70 #include <sys/watchdog.h>
71 #endif
72
73 #include <ddb/ddb.h>
74
75 #include <machine/cpu.h>
76 #include <machine/pcb.h>
77 #include <machine/smp.h>
78
79 #include <security/mac/mac_framework.h>
80
81 #include <vm/vm.h>
82 #include <vm/vm_object.h>
83 #include <vm/vm_page.h>
84 #include <vm/vm_pager.h>
85 #include <vm/swap_pager.h>
86
87 #include <sys/signalvar.h>
88
89 #ifndef PANIC_REBOOT_WAIT_TIME
90 #define PANIC_REBOOT_WAIT_TIME 15 /* default to 15 seconds */
91 #endif
92
93 /*
94 * Note that stdarg.h and the ANSI style va_start macro is used for both
95 * ANSI and traditional C compilers.
96 */
97 #include <machine/stdarg.h>
98
99 #ifdef KDB
100 #ifdef KDB_UNATTENDED
101 int debugger_on_panic = 0;
102 #else
103 int debugger_on_panic = 1;
104 #endif
105 SYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW | CTLFLAG_TUN,
106 &debugger_on_panic, 0, "Run debugger on kernel panic");
107 TUNABLE_INT("debug.debugger_on_panic", &debugger_on_panic);
108
109 #ifdef KDB_TRACE
110 static int trace_on_panic = 1;
111 #else
112 static int trace_on_panic = 0;
113 #endif
114 SYSCTL_INT(_debug, OID_AUTO, trace_on_panic, CTLFLAG_RW | CTLFLAG_TUN,
115 &trace_on_panic, 0, "Print stack trace on kernel panic");
116 TUNABLE_INT("debug.trace_on_panic", &trace_on_panic);
117 #endif /* KDB */
118
119 static int sync_on_panic = 0;
120 SYSCTL_INT(_kern, OID_AUTO, sync_on_panic, CTLFLAG_RW | CTLFLAG_TUN,
121 &sync_on_panic, 0, "Do a sync before rebooting from a panic");
122 TUNABLE_INT("kern.sync_on_panic", &sync_on_panic);
123
124 SYSCTL_NODE(_kern, OID_AUTO, shutdown, CTLFLAG_RW, 0, "Shutdown environment");
125
126 #ifndef DIAGNOSTIC
127 static int show_busybufs;
128 #else
129 static int show_busybufs = 1;
130 #endif
131 SYSCTL_INT(_kern_shutdown, OID_AUTO, show_busybufs, CTLFLAG_RW,
132 &show_busybufs, 0, "");
133
134 /*
135 * Variable panicstr contains argument to first call to panic; used as flag
136 * to indicate that the kernel has already called panic.
137 */
138 const char *panicstr;
139
140 int dumping; /* system is dumping */
141 int rebooting; /* system is rebooting */
142 static struct dumperinfo dumper; /* our selected dumper */
143
144 /* Context information for dump-debuggers. */
145 static struct pcb dumppcb; /* Registers. */
146 static lwpid_t dumptid; /* Thread ID. */
147
148 static void boot(int) __dead2;
149 static void poweroff_wait(void *, int);
150 static void shutdown_halt(void *junk, int howto);
151 static void shutdown_panic(void *junk, int howto);
152 static void shutdown_reset(void *junk, int howto);
153
154 /* register various local shutdown events */
155 static void
156 shutdown_conf(void *unused)
157 {
158
159 EVENTHANDLER_REGISTER(shutdown_final, poweroff_wait, NULL,
160 SHUTDOWN_PRI_FIRST);
161 EVENTHANDLER_REGISTER(shutdown_final, shutdown_halt, NULL,
162 SHUTDOWN_PRI_LAST + 100);
163 EVENTHANDLER_REGISTER(shutdown_final, shutdown_panic, NULL,
164 SHUTDOWN_PRI_LAST + 100);
165 EVENTHANDLER_REGISTER(shutdown_final, shutdown_reset, NULL,
166 SHUTDOWN_PRI_LAST + 200);
167 }
168
169 SYSINIT(shutdown_conf, SI_SUB_INTRINSIC, SI_ORDER_ANY, shutdown_conf, NULL);
170
171 /*
172 * The system call that results in a reboot.
173 */
174 /* ARGSUSED */
175 int
176 reboot(struct thread *td, struct reboot_args *uap)
177 {
178 int error;
179
180 error = 0;
181 #ifdef MAC
182 error = mac_system_check_reboot(td->td_ucred, uap->opt);
183 #endif
184 if (error == 0)
185 error = priv_check(td, PRIV_REBOOT);
186 if (error == 0) {
187 mtx_lock(&Giant);
188 boot(uap->opt);
189 mtx_unlock(&Giant);
190 }
191 return (error);
192 }
193
194 /*
195 * Called by events that want to shut down.. e.g <CTL><ALT><DEL> on a PC
196 */
197 static int shutdown_howto = 0;
198
199 void
200 shutdown_nice(int howto)
201 {
202
203 shutdown_howto = howto;
204
205 /* Send a signal to init(8) and have it shutdown the world */
206 if (initproc != NULL) {
207 PROC_LOCK(initproc);
208 psignal(initproc, SIGINT);
209 PROC_UNLOCK(initproc);
210 } else {
211 /* No init(8) running, so simply reboot */
212 boot(RB_NOSYNC);
213 }
214 return;
215 }
216 static int waittime = -1;
217
218 static void
219 print_uptime(void)
220 {
221 int f;
222 struct timespec ts;
223
224 getnanouptime(&ts);
225 printf("Uptime: ");
226 f = 0;
227 if (ts.tv_sec >= 86400) {
228 printf("%ldd", (long)ts.tv_sec / 86400);
229 ts.tv_sec %= 86400;
230 f = 1;
231 }
232 if (f || ts.tv_sec >= 3600) {
233 printf("%ldh", (long)ts.tv_sec / 3600);
234 ts.tv_sec %= 3600;
235 f = 1;
236 }
237 if (f || ts.tv_sec >= 60) {
238 printf("%ldm", (long)ts.tv_sec / 60);
239 ts.tv_sec %= 60;
240 f = 1;
241 }
242 printf("%lds\n", (long)ts.tv_sec);
243 }
244
245 static void
246 doadump(void)
247 {
248
249 /*
250 * Sometimes people have to call this from the kernel debugger.
251 * (if 'panic' can not dump)
252 * Give them a clue as to why they can't dump.
253 */
254 if (dumper.dumper == NULL) {
255 printf("Cannot dump. Device not defined or unavailable.\n");
256 return;
257 }
258
259 savectx(&dumppcb);
260 dumptid = curthread->td_tid;
261 dumping++;
262 #ifdef DDB
263 if (textdump_pending)
264 textdump_dumpsys(&dumper);
265 else
266 #endif
267 dumpsys(&dumper);
268 dumping--;
269 }
270
271 static int
272 isbufbusy(struct buf *bp)
273 {
274 if (((bp->b_flags & (B_INVAL | B_PERSISTENT)) == 0 &&
275 BUF_ISLOCKED(bp)) ||
276 ((bp->b_flags & (B_DELWRI | B_INVAL)) == B_DELWRI))
277 return (1);
278 return (0);
279 }
280
281 /*
282 * Shutdown the system cleanly to prepare for reboot, halt, or power off.
283 */
284 static void
285 boot(int howto)
286 {
287 static int first_buf_printf = 1;
288
289 #if defined(SMP)
290 /*
291 * Bind us to CPU 0 so that all shutdown code runs there. Some
292 * systems don't shutdown properly (i.e., ACPI power off) if we
293 * run on another processor.
294 */
295 thread_lock(curthread);
296 sched_bind(curthread, 0);
297 thread_unlock(curthread);
298 KASSERT(PCPU_GET(cpuid) == 0, ("boot: not running on cpu 0"));
299 #endif
300 /* We're in the process of rebooting. */
301 rebooting = 1;
302
303 /* collect extra flags that shutdown_nice might have set */
304 howto |= shutdown_howto;
305
306 /* We are out of the debugger now. */
307 kdb_active = 0;
308
309 /*
310 * Do any callouts that should be done BEFORE syncing the filesystems.
311 */
312 EVENTHANDLER_INVOKE(shutdown_pre_sync, howto);
313
314 /*
315 * Now sync filesystems
316 */
317 if (!cold && (howto & RB_NOSYNC) == 0 && waittime < 0) {
318 register struct buf *bp;
319 int iter, nbusy, pbusy;
320 #ifndef PREEMPTION
321 int subiter;
322 #endif
323
324 waittime = 0;
325
326 #ifdef SW_WATCHDOG
327 wdog_kern_pat(WD_LASTVAL);
328 #endif
329 sync(curthread, NULL);
330
331 /*
332 * With soft updates, some buffers that are
333 * written will be remarked as dirty until other
334 * buffers are written.
335 */
336 for (iter = pbusy = 0; iter < 20; iter++) {
337 nbusy = 0;
338 for (bp = &buf[nbuf]; --bp >= buf; )
339 if (isbufbusy(bp))
340 nbusy++;
341 if (nbusy == 0) {
342 if (first_buf_printf)
343 printf("All buffers synced.");
344 break;
345 }
346 if (first_buf_printf) {
347 printf("Syncing disks, buffers remaining... ");
348 first_buf_printf = 0;
349 }
350 printf("%d ", nbusy);
351 if (nbusy < pbusy)
352 iter = 0;
353 pbusy = nbusy;
354 #ifdef SW_WATCHDOG
355 wdog_kern_pat(WD_LASTVAL);
356 #endif
357 sync(curthread, NULL);
358
359 #ifdef PREEMPTION
360 /*
361 * Drop Giant and spin for a while to allow
362 * interrupt threads to run.
363 */
364 DROP_GIANT();
365 DELAY(50000 * iter);
366 PICKUP_GIANT();
367 #else
368 /*
369 * Drop Giant and context switch several times to
370 * allow interrupt threads to run.
371 */
372 DROP_GIANT();
373 for (subiter = 0; subiter < 50 * iter; subiter++) {
374 thread_lock(curthread);
375 mi_switch(SW_VOL, NULL);
376 thread_unlock(curthread);
377 DELAY(1000);
378 }
379 PICKUP_GIANT();
380 #endif
381 }
382 printf("\n");
383 /*
384 * Count only busy local buffers to prevent forcing
385 * a fsck if we're just a client of a wedged NFS server
386 */
387 nbusy = 0;
388 for (bp = &buf[nbuf]; --bp >= buf; ) {
389 if (isbufbusy(bp)) {
390 #if 0
391 /* XXX: This is bogus. We should probably have a BO_REMOTE flag instead */
392 if (bp->b_dev == NULL) {
393 TAILQ_REMOVE(&mountlist,
394 bp->b_vp->v_mount, mnt_list);
395 continue;
396 }
397 #endif
398 nbusy++;
399 if (show_busybufs > 0) {
400 printf(
401 "%d: buf:%p, vnode:%p, flags:%0x, blkno:%jd, lblkno:%jd, buflock:",
402 nbusy, bp, bp->b_vp, bp->b_flags,
403 (intmax_t)bp->b_blkno,
404 (intmax_t)bp->b_lblkno);
405 BUF_LOCKPRINTINFO(bp);
406 if (show_busybufs > 1)
407 vn_printf(bp->b_vp,
408 "vnode content: ");
409 }
410 }
411 }
412 if (nbusy) {
413 /*
414 * Failed to sync all blocks. Indicate this and don't
415 * unmount filesystems (thus forcing an fsck on reboot).
416 */
417 printf("Giving up on %d buffers\n", nbusy);
418 DELAY(5000000); /* 5 seconds */
419 } else {
420 if (!first_buf_printf)
421 printf("Final sync complete\n");
422 /*
423 * Unmount filesystems
424 */
425 if (panicstr == 0)
426 vfs_unmountall();
427 }
428 swapoff_all();
429 DELAY(100000); /* wait for console output to finish */
430 }
431
432 print_uptime();
433
434 /*
435 * Ok, now do things that assume all filesystem activity has
436 * been completed.
437 */
438 EVENTHANDLER_INVOKE(shutdown_post_sync, howto);
439
440 if ((howto & (RB_HALT|RB_DUMP)) == RB_DUMP && !cold && !dumping)
441 doadump();
442
443 /* Now that we're going to really halt the system... */
444 EVENTHANDLER_INVOKE(shutdown_final, howto);
445
446 for(;;) ; /* safety against shutdown_reset not working */
447 /* NOTREACHED */
448 }
449
450 /*
451 * If the shutdown was a clean halt, behave accordingly.
452 */
453 static void
454 shutdown_halt(void *junk, int howto)
455 {
456
457 if (howto & RB_HALT) {
458 printf("\n");
459 printf("The operating system has halted.\n");
460 printf("Please press any key to reboot.\n\n");
461 switch (cngetc()) {
462 case -1: /* No console, just die */
463 cpu_halt();
464 /* NOTREACHED */
465 default:
466 howto &= ~RB_HALT;
467 break;
468 }
469 }
470 }
471
472 /*
473 * Check to see if the system paniced, pause and then reboot
474 * according to the specified delay.
475 */
476 static void
477 shutdown_panic(void *junk, int howto)
478 {
479 int loop;
480
481 if (howto & RB_DUMP) {
482 if (PANIC_REBOOT_WAIT_TIME != 0) {
483 if (PANIC_REBOOT_WAIT_TIME != -1) {
484 printf("Automatic reboot in %d seconds - "
485 "press a key on the console to abort\n",
486 PANIC_REBOOT_WAIT_TIME);
487 for (loop = PANIC_REBOOT_WAIT_TIME * 10;
488 loop > 0; --loop) {
489 DELAY(1000 * 100); /* 1/10th second */
490 /* Did user type a key? */
491 if (cncheckc() != -1)
492 break;
493 }
494 if (!loop)
495 return;
496 }
497 } else { /* zero time specified - reboot NOW */
498 return;
499 }
500 printf("--> Press a key on the console to reboot,\n");
501 printf("--> or switch off the system now.\n");
502 cngetc();
503 }
504 }
505
506 /*
507 * Everything done, now reset
508 */
509 static void
510 shutdown_reset(void *junk, int howto)
511 {
512
513 printf("Rebooting...\n");
514 DELAY(1000000); /* wait 1 sec for printf's to complete and be read */
515
516 /*
517 * Acquiring smp_ipi_mtx here has a double effect:
518 * - it disables interrupts avoiding CPU0 preemption
519 * by fast handlers (thus deadlocking against other CPUs)
520 * - it avoids deadlocks against smp_rendezvous() or, more
521 * generally, threads busy-waiting, with this spinlock held,
522 * and waiting for responses by threads on other CPUs
523 * (ie. smp_tlb_shootdown()).
524 *
525 * For the !SMP case it just needs to handle the former problem.
526 */
527 #ifdef SMP
528 mtx_lock_spin(&smp_ipi_mtx);
529 #else
530 spinlock_enter();
531 #endif
532
533 /* cpu_boot(howto); */ /* doesn't do anything at the moment */
534 cpu_reset();
535 /* NOTREACHED */ /* assuming reset worked */
536 }
537
538 /*
539 * Panic is called on unresolvable fatal errors. It prints "panic: mesg",
540 * and then reboots. If we are called twice, then we avoid trying to sync
541 * the disks as this often leads to recursive panics.
542 */
543 void
544 panic(const char *fmt, ...)
545 {
546 #ifdef SMP
547 static volatile u_int panic_cpu = NOCPU;
548 #endif
549 struct thread *td = curthread;
550 int bootopt, newpanic;
551 va_list ap;
552 static char buf[256];
553
554 critical_enter();
555 #ifdef SMP
556 /*
557 * We don't want multiple CPU's to panic at the same time, so we
558 * use panic_cpu as a simple spinlock. We have to keep checking
559 * panic_cpu if we are spinning in case the panic on the first
560 * CPU is canceled.
561 */
562 if (panic_cpu != PCPU_GET(cpuid))
563 while (atomic_cmpset_int(&panic_cpu, NOCPU,
564 PCPU_GET(cpuid)) == 0)
565 while (panic_cpu != NOCPU)
566 ; /* nothing */
567 #endif
568
569 bootopt = RB_AUTOBOOT | RB_DUMP;
570 newpanic = 0;
571 if (panicstr)
572 bootopt |= RB_NOSYNC;
573 else {
574 panicstr = fmt;
575 newpanic = 1;
576 }
577
578 va_start(ap, fmt);
579 if (newpanic) {
580 (void)vsnprintf(buf, sizeof(buf), fmt, ap);
581 panicstr = buf;
582 printf("panic: %s\n", buf);
583 } else {
584 printf("panic: ");
585 vprintf(fmt, ap);
586 printf("\n");
587 }
588 va_end(ap);
589 #ifdef SMP
590 printf("cpuid = %d\n", PCPU_GET(cpuid));
591 #endif
592
593 #ifdef KDB
594 if (newpanic && trace_on_panic)
595 kdb_backtrace();
596 if (debugger_on_panic)
597 kdb_enter(KDB_WHY_PANIC, "panic");
598 #ifdef RESTARTABLE_PANICS
599 /* See if the user aborted the panic, in which case we continue. */
600 if (panicstr == NULL) {
601 #ifdef SMP
602 atomic_store_rel_int(&panic_cpu, NOCPU);
603 #endif
604 return;
605 }
606 #endif
607 #endif
608 /*thread_lock(td); */
609 td->td_flags |= TDF_INPANIC;
610 /* thread_unlock(td); */
611 if (!sync_on_panic)
612 bootopt |= RB_NOSYNC;
613 critical_exit();
614 boot(bootopt);
615 }
616
617 /*
618 * Support for poweroff delay.
619 */
620 #ifndef POWEROFF_DELAY
621 # define POWEROFF_DELAY 5000
622 #endif
623 static int poweroff_delay = POWEROFF_DELAY;
624
625 SYSCTL_INT(_kern_shutdown, OID_AUTO, poweroff_delay, CTLFLAG_RW,
626 &poweroff_delay, 0, "");
627
628 static void
629 poweroff_wait(void *junk, int howto)
630 {
631
632 if (!(howto & RB_POWEROFF) || poweroff_delay <= 0)
633 return;
634 DELAY(poweroff_delay * 1000);
635 }
636
637 /*
638 * Some system processes (e.g. syncer) need to be stopped at appropriate
639 * points in their main loops prior to a system shutdown, so that they
640 * won't interfere with the shutdown process (e.g. by holding a disk buf
641 * to cause sync to fail). For each of these system processes, register
642 * shutdown_kproc() as a handler for one of shutdown events.
643 */
644 static int kproc_shutdown_wait = 60;
645 SYSCTL_INT(_kern_shutdown, OID_AUTO, kproc_shutdown_wait, CTLFLAG_RW,
646 &kproc_shutdown_wait, 0, "");
647
648 void
649 kproc_shutdown(void *arg, int howto)
650 {
651 struct proc *p;
652 char procname[MAXCOMLEN + 1];
653 int error;
654
655 if (panicstr)
656 return;
657
658 p = (struct proc *)arg;
659 strlcpy(procname, p->p_comm, sizeof(procname));
660 printf("Waiting (max %d seconds) for system process `%s' to stop...",
661 kproc_shutdown_wait, procname);
662 error = kproc_suspend(p, kproc_shutdown_wait * hz);
663
664 if (error == EWOULDBLOCK)
665 printf("timed out\n");
666 else
667 printf("done\n");
668 }
669
670 void
671 kthread_shutdown(void *arg, int howto)
672 {
673 struct thread *td;
674 char procname[MAXCOMLEN + 1];
675 int error;
676
677 if (panicstr)
678 return;
679
680 td = (struct thread *)arg;
681 strlcpy(procname, td->td_name, sizeof(procname));
682 printf("Waiting (max %d seconds) for system thread `%s' to stop...",
683 kproc_shutdown_wait, procname);
684 error = kthread_suspend(td, kproc_shutdown_wait * hz);
685
686 if (error == EWOULDBLOCK)
687 printf("timed out\n");
688 else
689 printf("done\n");
690 }
691
692 /* Registration of dumpers */
693 int
694 set_dumper(struct dumperinfo *di)
695 {
696
697 if (di == NULL) {
698 bzero(&dumper, sizeof dumper);
699 return (0);
700 }
701 if (dumper.dumper != NULL)
702 return (EBUSY);
703 dumper = *di;
704 return (0);
705 }
706
707 /* Call dumper with bounds checking. */
708 int
709 dump_write(struct dumperinfo *di, void *virtual, vm_offset_t physical,
710 off_t offset, size_t length)
711 {
712
713 if (length != 0 && (offset < di->mediaoffset ||
714 offset - di->mediaoffset + length > di->mediasize)) {
715 printf("Attempt to write outside dump device boundaries.\n"
716 "offset(%jd), mediaoffset(%jd), length(%ju), mediasize(%jd).\n",
717 (intmax_t)offset, (intmax_t)di->mediaoffset,
718 (uintmax_t)length, (intmax_t)di->mediasize);
719 return (ENOSPC);
720 }
721 return (di->dumper(di->priv, virtual, physical, offset, length));
722 }
723
724 void
725 mkdumpheader(struct kerneldumpheader *kdh, char *magic, uint32_t archver,
726 uint64_t dumplen, uint32_t blksz)
727 {
728
729 bzero(kdh, sizeof(*kdh));
730 strncpy(kdh->magic, magic, sizeof(kdh->magic));
731 strncpy(kdh->architecture, MACHINE_ARCH, sizeof(kdh->architecture));
732 kdh->version = htod32(KERNELDUMPVERSION);
733 kdh->architectureversion = htod32(archver);
734 kdh->dumplength = htod64(dumplen);
735 kdh->dumptime = htod64(time_second);
736 kdh->blocksize = htod32(blksz);
737 strncpy(kdh->hostname, prison0.pr_hostname, sizeof(kdh->hostname));
738 strncpy(kdh->versionstring, version, sizeof(kdh->versionstring));
739 if (panicstr != NULL)
740 strncpy(kdh->panicstring, panicstr, sizeof(kdh->panicstring));
741 kdh->parity = kerneldump_parity(kdh);
742 }
Cache object: f50fab8d09f475ed308c9cace6b834f0
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