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("$FreeBSD$"); 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 static SYSCTL_NODE(_kern, OID_AUTO, shutdown, CTLFLAG_RW, 0, 125 "Shutdown environment"); 126 127 #ifndef DIAGNOSTIC 128 static int show_busybufs; 129 #else 130 static int show_busybufs = 1; 131 #endif 132 SYSCTL_INT(_kern_shutdown, OID_AUTO, show_busybufs, CTLFLAG_RW, 133 &show_busybufs, 0, ""); 134 135 /* 136 * Variable panicstr contains argument to first call to panic; used as flag 137 * to indicate that the kernel has already called panic. 138 */ 139 const char *panicstr; 140 141 int dumping; /* system is dumping */ 142 int rebooting; /* system is rebooting */ 143 static struct dumperinfo dumper; /* our selected dumper */ 144 145 /* Context information for dump-debuggers. */ 146 static struct pcb dumppcb; /* Registers. */ 147 static lwpid_t dumptid; /* Thread ID. */ 148 149 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 sys_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 kern_reboot(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 kern_psignal(initproc, SIGINT); 209 PROC_UNLOCK(initproc); 210 } else { 211 /* No init(8) running, so simply reboot */ 212 kern_reboot(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 int 246 doadump(boolean_t textdump) 247 { 248 boolean_t coredump; 249 250 if (dumping) 251 return (EBUSY); 252 if (dumper.dumper == NULL) 253 return (ENXIO); 254 255 savectx(&dumppcb); 256 dumptid = curthread->td_tid; 257 dumping++; 258 259 coredump = TRUE; 260 #ifdef DDB 261 if (textdump && textdump_pending) { 262 coredump = FALSE; 263 textdump_dumpsys(&dumper); 264 } 265 #endif 266 if (coredump) 267 dumpsys(&dumper); 268 269 dumping--; 270 return (0); 271 } 272 273 static int 274 isbufbusy(struct buf *bp) 275 { 276 if (((bp->b_flags & (B_INVAL | B_PERSISTENT)) == 0 && 277 BUF_ISLOCKED(bp)) || 278 ((bp->b_flags & (B_DELWRI | B_INVAL)) == B_DELWRI)) 279 return (1); 280 return (0); 281 } 282 283 /* 284 * Shutdown the system cleanly to prepare for reboot, halt, or power off. 285 */ 286 void 287 kern_reboot(int howto) 288 { 289 static int first_buf_printf = 1; 290 291 #if defined(SMP) 292 /* 293 * Bind us to CPU 0 so that all shutdown code runs there. Some 294 * systems don't shutdown properly (i.e., ACPI power off) if we 295 * run on another processor. 296 */ 297 thread_lock(curthread); 298 sched_bind(curthread, 0); 299 thread_unlock(curthread); 300 KASSERT(PCPU_GET(cpuid) == 0, ("%s: not running on cpu 0", __func__)); 301 #endif 302 /* We're in the process of rebooting. */ 303 rebooting = 1; 304 305 /* collect extra flags that shutdown_nice might have set */ 306 howto |= shutdown_howto; 307 308 /* We are out of the debugger now. */ 309 kdb_active = 0; 310 311 /* 312 * Do any callouts that should be done BEFORE syncing the filesystems. 313 */ 314 EVENTHANDLER_INVOKE(shutdown_pre_sync, howto); 315 316 /* 317 * Now sync filesystems 318 */ 319 if (!cold && (howto & RB_NOSYNC) == 0 && waittime < 0) { 320 register struct buf *bp; 321 int iter, nbusy, pbusy; 322 #ifndef PREEMPTION 323 int subiter; 324 #endif 325 326 waittime = 0; 327 328 #ifdef SW_WATCHDOG 329 wdog_kern_pat(WD_LASTVAL); 330 #endif 331 sys_sync(curthread, NULL); 332 333 /* 334 * With soft updates, some buffers that are 335 * written will be remarked as dirty until other 336 * buffers are written. 337 */ 338 for (iter = pbusy = 0; iter < 20; iter++) { 339 nbusy = 0; 340 for (bp = &buf[nbuf]; --bp >= buf; ) 341 if (isbufbusy(bp)) 342 nbusy++; 343 if (nbusy == 0) { 344 if (first_buf_printf) 345 printf("All buffers synced."); 346 break; 347 } 348 if (first_buf_printf) { 349 printf("Syncing disks, buffers remaining... "); 350 first_buf_printf = 0; 351 } 352 printf("%d ", nbusy); 353 if (nbusy < pbusy) 354 iter = 0; 355 pbusy = nbusy; 356 #ifdef SW_WATCHDOG 357 wdog_kern_pat(WD_LASTVAL); 358 #endif 359 sys_sync(curthread, NULL); 360 361 #ifdef PREEMPTION 362 /* 363 * Drop Giant and spin for a while to allow 364 * interrupt threads to run. 365 */ 366 DROP_GIANT(); 367 DELAY(50000 * iter); 368 PICKUP_GIANT(); 369 #else 370 /* 371 * Drop Giant and context switch several times to 372 * allow interrupt threads to run. 373 */ 374 DROP_GIANT(); 375 for (subiter = 0; subiter < 50 * iter; subiter++) { 376 thread_lock(curthread); 377 mi_switch(SW_VOL, NULL); 378 thread_unlock(curthread); 379 DELAY(1000); 380 } 381 PICKUP_GIANT(); 382 #endif 383 } 384 printf("\n"); 385 /* 386 * Count only busy local buffers to prevent forcing 387 * a fsck if we're just a client of a wedged NFS server 388 */ 389 nbusy = 0; 390 for (bp = &buf[nbuf]; --bp >= buf; ) { 391 if (isbufbusy(bp)) { 392 #if 0 393 /* XXX: This is bogus. We should probably have a BO_REMOTE flag instead */ 394 if (bp->b_dev == NULL) { 395 TAILQ_REMOVE(&mountlist, 396 bp->b_vp->v_mount, mnt_list); 397 continue; 398 } 399 #endif 400 nbusy++; 401 if (show_busybufs > 0) { 402 printf( 403 "%d: buf:%p, vnode:%p, flags:%0x, blkno:%jd, lblkno:%jd, buflock:", 404 nbusy, bp, bp->b_vp, bp->b_flags, 405 (intmax_t)bp->b_blkno, 406 (intmax_t)bp->b_lblkno); 407 BUF_LOCKPRINTINFO(bp); 408 if (show_busybufs > 1) 409 vn_printf(bp->b_vp, 410 "vnode content: "); 411 } 412 } 413 } 414 if (nbusy) { 415 /* 416 * Failed to sync all blocks. Indicate this and don't 417 * unmount filesystems (thus forcing an fsck on reboot). 418 */ 419 printf("Giving up on %d buffers\n", nbusy); 420 DELAY(5000000); /* 5 seconds */ 421 } else { 422 if (!first_buf_printf) 423 printf("Final sync complete\n"); 424 /* 425 * Unmount filesystems 426 */ 427 if (panicstr == 0) 428 vfs_unmountall(); 429 } 430 swapoff_all(); 431 DELAY(100000); /* wait for console output to finish */ 432 } 433 434 print_uptime(); 435 436 /* 437 * Ok, now do things that assume all filesystem activity has 438 * been completed. 439 */ 440 EVENTHANDLER_INVOKE(shutdown_post_sync, howto); 441 442 if ((howto & (RB_HALT|RB_DUMP)) == RB_DUMP && !cold && !dumping) 443 doadump(TRUE); 444 445 /* Now that we're going to really halt the system... */ 446 EVENTHANDLER_INVOKE(shutdown_final, howto); 447 448 for(;;) ; /* safety against shutdown_reset not working */ 449 /* NOTREACHED */ 450 } 451 452 /* 453 * If the shutdown was a clean halt, behave accordingly. 454 */ 455 static void 456 shutdown_halt(void *junk, int howto) 457 { 458 459 if (howto & RB_HALT) { 460 printf("\n"); 461 printf("The operating system has halted.\n"); 462 printf("Please press any key to reboot.\n\n"); 463 switch (cngetc()) { 464 case -1: /* No console, just die */ 465 cpu_halt(); 466 /* NOTREACHED */ 467 default: 468 howto &= ~RB_HALT; 469 break; 470 } 471 } 472 } 473 474 /* 475 * Check to see if the system paniced, pause and then reboot 476 * according to the specified delay. 477 */ 478 static void 479 shutdown_panic(void *junk, int howto) 480 { 481 int loop; 482 483 if (howto & RB_DUMP) { 484 if (PANIC_REBOOT_WAIT_TIME != 0) { 485 if (PANIC_REBOOT_WAIT_TIME != -1) { 486 printf("Automatic reboot in %d seconds - " 487 "press a key on the console to abort\n", 488 PANIC_REBOOT_WAIT_TIME); 489 for (loop = PANIC_REBOOT_WAIT_TIME * 10; 490 loop > 0; --loop) { 491 DELAY(1000 * 100); /* 1/10th second */ 492 /* Did user type a key? */ 493 if (cncheckc() != -1) 494 break; 495 } 496 if (!loop) 497 return; 498 } 499 } else { /* zero time specified - reboot NOW */ 500 return; 501 } 502 printf("--> Press a key on the console to reboot,\n"); 503 printf("--> or switch off the system now.\n"); 504 cngetc(); 505 } 506 } 507 508 /* 509 * Everything done, now reset 510 */ 511 static void 512 shutdown_reset(void *junk, int howto) 513 { 514 515 printf("Rebooting...\n"); 516 DELAY(1000000); /* wait 1 sec for printf's to complete and be read */ 517 518 /* 519 * Acquiring smp_ipi_mtx here has a double effect: 520 * - it disables interrupts avoiding CPU0 preemption 521 * by fast handlers (thus deadlocking against other CPUs) 522 * - it avoids deadlocks against smp_rendezvous() or, more 523 * generally, threads busy-waiting, with this spinlock held, 524 * and waiting for responses by threads on other CPUs 525 * (ie. smp_tlb_shootdown()). 526 * 527 * For the !SMP case it just needs to handle the former problem. 528 */ 529 #ifdef SMP 530 mtx_lock_spin(&smp_ipi_mtx); 531 #else 532 spinlock_enter(); 533 #endif 534 535 /* cpu_boot(howto); */ /* doesn't do anything at the moment */ 536 cpu_reset(); 537 /* NOTREACHED */ /* assuming reset worked */ 538 } 539 540 /* 541 * Panic is called on unresolvable fatal errors. It prints "panic: mesg", 542 * and then reboots. If we are called twice, then we avoid trying to sync 543 * the disks as this often leads to recursive panics. 544 */ 545 void 546 panic(const char *fmt, ...) 547 { 548 #ifdef SMP 549 static volatile u_int panic_cpu = NOCPU; 550 #endif 551 struct thread *td = curthread; 552 int bootopt, newpanic; 553 va_list ap; 554 static char buf[256]; 555 556 critical_enter(); 557 #ifdef SMP 558 /* 559 * We don't want multiple CPU's to panic at the same time, so we 560 * use panic_cpu as a simple spinlock. We have to keep checking 561 * panic_cpu if we are spinning in case the panic on the first 562 * CPU is canceled. 563 */ 564 if (panic_cpu != PCPU_GET(cpuid)) 565 while (atomic_cmpset_int(&panic_cpu, NOCPU, 566 PCPU_GET(cpuid)) == 0) 567 while (panic_cpu != NOCPU) 568 ; /* nothing */ 569 #endif 570 571 bootopt = RB_AUTOBOOT; 572 newpanic = 0; 573 if (panicstr) 574 bootopt |= RB_NOSYNC; 575 else { 576 bootopt |= RB_DUMP; 577 panicstr = fmt; 578 newpanic = 1; 579 } 580 581 va_start(ap, fmt); 582 if (newpanic) { 583 (void)vsnprintf(buf, sizeof(buf), fmt, ap); 584 panicstr = buf; 585 printf("panic: %s\n", buf); 586 } else { 587 printf("panic: "); 588 vprintf(fmt, ap); 589 printf("\n"); 590 } 591 va_end(ap); 592 #ifdef SMP 593 printf("cpuid = %d\n", PCPU_GET(cpuid)); 594 #endif 595 596 #ifdef KDB 597 if (newpanic && trace_on_panic) 598 kdb_backtrace(); 599 if (debugger_on_panic) 600 kdb_enter(KDB_WHY_PANIC, "panic"); 601 #endif 602 /*thread_lock(td); */ 603 td->td_flags |= TDF_INPANIC; 604 /* thread_unlock(td); */ 605 if (!sync_on_panic) 606 bootopt |= RB_NOSYNC; 607 critical_exit(); 608 kern_reboot(bootopt); 609 } 610 611 /* 612 * Support for poweroff delay. 613 * 614 * Please note that setting this delay too short might power off your machine 615 * before the write cache on your hard disk has been flushed, leading to 616 * soft-updates inconsistencies. 617 */ 618 #ifndef POWEROFF_DELAY 619 # define POWEROFF_DELAY 5000 620 #endif 621 static int poweroff_delay = POWEROFF_DELAY; 622 623 SYSCTL_INT(_kern_shutdown, OID_AUTO, poweroff_delay, CTLFLAG_RW, 624 &poweroff_delay, 0, ""); 625 626 static void 627 poweroff_wait(void *junk, int howto) 628 { 629 630 if (!(howto & RB_POWEROFF) || poweroff_delay <= 0) 631 return; 632 DELAY(poweroff_delay * 1000); 633 } 634 635 /* 636 * Some system processes (e.g. syncer) need to be stopped at appropriate 637 * points in their main loops prior to a system shutdown, so that they 638 * won't interfere with the shutdown process (e.g. by holding a disk buf 639 * to cause sync to fail). For each of these system processes, register 640 * shutdown_kproc() as a handler for one of shutdown events. 641 */ 642 static int kproc_shutdown_wait = 60; 643 SYSCTL_INT(_kern_shutdown, OID_AUTO, kproc_shutdown_wait, CTLFLAG_RW, 644 &kproc_shutdown_wait, 0, ""); 645 646 void 647 kproc_shutdown(void *arg, int howto) 648 { 649 struct proc *p; 650 int error; 651 652 if (panicstr) 653 return; 654 655 p = (struct proc *)arg; 656 printf("Waiting (max %d seconds) for system process `%s' to stop...", 657 kproc_shutdown_wait, p->p_comm); 658 error = kproc_suspend(p, kproc_shutdown_wait * hz); 659 660 if (error == EWOULDBLOCK) 661 printf("timed out\n"); 662 else 663 printf("done\n"); 664 } 665 666 void 667 kthread_shutdown(void *arg, int howto) 668 { 669 struct thread *td; 670 int error; 671 672 if (panicstr) 673 return; 674 675 td = (struct thread *)arg; 676 printf("Waiting (max %d seconds) for system thread `%s' to stop...", 677 kproc_shutdown_wait, td->td_name); 678 error = kthread_suspend(td, kproc_shutdown_wait * hz); 679 680 if (error == EWOULDBLOCK) 681 printf("timed out\n"); 682 else 683 printf("done\n"); 684 } 685 686 /* Registration of dumpers */ 687 int 688 set_dumper(struct dumperinfo *di) 689 { 690 691 if (di == NULL) { 692 bzero(&dumper, sizeof dumper); 693 return (0); 694 } 695 if (dumper.dumper != NULL) 696 return (EBUSY); 697 dumper = *di; 698 return (0); 699 } 700 701 /* Call dumper with bounds checking. */ 702 int 703 dump_write(struct dumperinfo *di, void *virtual, vm_offset_t physical, 704 off_t offset, size_t length) 705 { 706 707 if (length != 0 && (offset < di->mediaoffset || 708 offset - di->mediaoffset + length > di->mediasize)) { 709 printf("Attempt to write outside dump device boundaries.\n" 710 "offset(%jd), mediaoffset(%jd), length(%ju), mediasize(%jd).\n", 711 (intmax_t)offset, (intmax_t)di->mediaoffset, 712 (uintmax_t)length, (intmax_t)di->mediasize); 713 return (ENOSPC); 714 } 715 return (di->dumper(di->priv, virtual, physical, offset, length)); 716 } 717 718 void 719 mkdumpheader(struct kerneldumpheader *kdh, char *magic, uint32_t archver, 720 uint64_t dumplen, uint32_t blksz) 721 { 722 723 bzero(kdh, sizeof(*kdh)); 724 strncpy(kdh->magic, magic, sizeof(kdh->magic)); 725 strncpy(kdh->architecture, MACHINE_ARCH, sizeof(kdh->architecture)); 726 kdh->version = htod32(KERNELDUMPVERSION); 727 kdh->architectureversion = htod32(archver); 728 kdh->dumplength = htod64(dumplen); 729 kdh->dumptime = htod64(time_second); 730 kdh->blocksize = htod32(blksz); 731 strncpy(kdh->hostname, prison0.pr_hostname, sizeof(kdh->hostname)); 732 strncpy(kdh->versionstring, version, sizeof(kdh->versionstring)); 733 if (panicstr != NULL) 734 strncpy(kdh->panicstring, panicstr, sizeof(kdh->panicstring)); 735 kdh->parity = kerneldump_parity(kdh); 736 } 737