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
| 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 * $Id: kern_shutdown.c,v 1.36 1998/08/19 20:20:52 des Exp $
| 39 * $Id: kern_shutdown.c,v 1.37 1998/08/23 14:18:08 des Exp $
|
40 */
41
42#include "opt_ddb.h"
43#include "opt_hw_wdog.h"
44#include "opt_panic.h"
45#include "opt_show_busybufs.h"
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/buf.h>
50#include <sys/reboot.h>
51#include <sys/proc.h>
52#include <sys/malloc.h>
53#include <sys/kernel.h>
54#include <sys/mount.h>
55#include <sys/sysctl.h>
56#include <sys/conf.h>
57#include <sys/sysproto.h>
58
59#include <machine/pcb.h>
60#include <machine/clock.h>
61#include <machine/cons.h>
62#include <machine/md_var.h>
63#ifdef SMP
64#include <machine/smp.h> /* smp_active, cpuid */
65#endif
66
67#include <sys/signalvar.h>
68
69#ifndef PANIC_REBOOT_WAIT_TIME
70#define PANIC_REBOOT_WAIT_TIME 15 /* default to 15 seconds */
71#endif
72
73/*
74 * Note that stdarg.h and the ANSI style va_start macro is used for both
75 * ANSI and traditional C compilers.
76 */
77#include <machine/stdarg.h>
78
79#ifdef DDB
80#ifdef DDB_UNATTENDED
81static int debugger_on_panic = 0;
82#else
83static int debugger_on_panic = 1;
84#endif
85SYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW,
86 &debugger_on_panic, 0, "");
87#endif
88
89#ifdef HW_WDOG
90/*
91 * If there is a hardware watchdog, point this at the function needed to
92 * hold it off.
93 * It's needed when the kernel needs to do some lengthy operations.
94 * e.g. in wd.c when dumping core.. It's most annoying to have
95 * your precious core-dump only half written because the wdog kicked in.
96 */
97watchdog_tickle_fn wdog_tickler = NULL;
98#endif /* HW_WDOG */
99
100/*
101 * Variable panicstr contains argument to first call to panic; used as flag
102 * to indicate that the kernel has already called panic.
103 */
104const char *panicstr;
105
106/*
107 * callout list for things to do a shutdown
108 */
109typedef struct shutdown_list_element {
110 struct shutdown_list_element *next;
111 bootlist_fn function;
112 void *arg;
113} *sle_p;
114
115/*
116 * there are two shutdown lists. Some things need to be shut down
117 * Earlier than others.
118 */
119static sle_p shutdown_list1;
120static sle_p shutdown_list2;
121
122static void boot __P((int)) __dead2;
123static void dumpsys __P((void));
124
125#ifndef _SYS_SYSPROTO_H_
126struct reboot_args {
127 int opt;
128};
129#endif
130/* ARGSUSED */
131
132/*
133 * The system call that results in a reboot
134 */
135int
136reboot(p, uap)
137 struct proc *p;
138 struct reboot_args *uap;
139{
140 int error;
141
142 if ((error = suser(p->p_ucred, &p->p_acflag)))
143 return (error);
144
145 boot(uap->opt);
146 return (0);
147}
148
149/*
150 * Called by events that want to shut down.. e.g <CTL><ALT><DEL> on a PC
151 */
152void
153shutdown_nice()
154{
155 /* Send a signal to init(8) and have it shutdown the world */
156 if (initproc != NULL) {
157 psignal(initproc, SIGINT);
158 } else {
159 /* No init(8) running, so simply reboot */
160 boot(RB_NOSYNC);
161 }
162 return;
163}
164static int waittime = -1;
165static struct pcb dumppcb;
166
167/*
168 * Go through the rigmarole of shutting down..
169 * this used to be in machdep.c but I'll be dammned if I could see
170 * anything machine dependant in it.
171 */
172static void
173boot(howto)
174 int howto;
175{
176 sle_p ep;
177
178#ifdef SMP
179 if (smp_active) {
180 printf("boot() called on cpu#%d\n", cpuid);
181 }
182#endif
183 /*
184 * Do any callouts that should be done BEFORE syncing the filesystems.
185 */
186 ep = shutdown_list1;
187 while (ep) {
188 shutdown_list1 = ep->next;
189 (*ep->function)(howto, ep->arg);
190 ep = ep->next;
191 }
192
193 /*
194 * Now sync filesystems
195 */
196 if (!cold && (howto & RB_NOSYNC) == 0 && waittime < 0) {
197 register struct buf *bp;
198 int iter, nbusy;
199
200 waittime = 0;
201 printf("\nsyncing disks... ");
202
203 sync(&proc0, NULL);
204
205 /*
206 * With soft updates, some buffers that are
207 * written will be remarked as dirty until other
208 * buffers are written.
209 */
210 for (iter = 0; iter < 20; iter++) {
211 nbusy = 0;
212 for (bp = &buf[nbuf]; --bp >= buf; ) {
213 if ((bp->b_flags & (B_BUSY | B_INVAL)) == B_BUSY) {
214 nbusy++;
215 } else if ((bp->b_flags & (B_DELWRI | B_INVAL))
216 == B_DELWRI) {
217 /* bawrite(bp);*/
218 nbusy++;
219 }
220 }
221 if (nbusy == 0)
222 break;
223 printf("%d ", nbusy);
224 sync(&proc0, NULL);
225 DELAY(50000 * iter);
226 }
227 if (nbusy) {
228 /*
229 * Failed to sync all blocks. Indicate this and don't
230 * unmount filesystems (thus forcing an fsck on reboot).
231 */
232 printf("giving up\n");
233#ifdef SHOW_BUSYBUFS
234 nbusy = 0;
235 for (bp = &buf[nbuf]; --bp >= buf; ) {
236 if ((bp->b_flags & (B_BUSY | B_INVAL)) == B_BUSY) {
237 nbusy++;
238 printf(
239 "%d: dev:%08lx, flags:%08lx, blkno:%ld, lblkno:%ld\n",
240 nbusy, (u_long)bp->b_dev,
241 bp->b_flags, (long)bp->b_blkno,
242 (long)bp->b_lblkno);
243 }
244 }
245 DELAY(5000000); /* 5 seconds */
246#endif
247 } else {
248 printf("done\n");
249 /*
250 * Unmount filesystems
251 */
252 if (panicstr == 0)
253 vfs_unmountall();
254 }
255 DELAY(100000); /* wait for console output to finish */
256 }
257
258 /*
259 * Ok, now do things that assume all filesystem activity has
260 * been completed.
261 */
262 ep = shutdown_list2;
263 while (ep) {
264 shutdown_list2 = ep->next;
265 (*ep->function)(howto, ep->arg);
266 ep = ep->next;
267 }
268 splhigh();
269 if (howto & RB_HALT) {
270 cpu_power_down();
271 printf("\n");
272 printf("The operating system has halted.\n");
273 printf("Please press any key to reboot.\n\n");
274 switch (cngetc()) {
275 case -1: /* No console, just die */
276 cpu_halt();
277 /* NOTREACHED */
278 default:
279 break;
280 }
281 } else {
282 if (howto & RB_DUMP) {
283 if (!cold) {
284 savectx(&dumppcb);
285#ifdef __i386__
286 dumppcb.pcb_cr3 = rcr3();
287#endif
288 dumpsys();
289 }
290
291 if (PANIC_REBOOT_WAIT_TIME != 0) {
292 if (PANIC_REBOOT_WAIT_TIME != -1) {
293 int loop;
294 printf("Automatic reboot in %d seconds - press a key on the console to abort\n",
295 PANIC_REBOOT_WAIT_TIME);
296 for (loop = PANIC_REBOOT_WAIT_TIME * 10; loop > 0; --loop) {
297 DELAY(1000 * 100); /* 1/10th second */
298 /* Did user type a key? */
299 if (cncheckc() != -1)
300 break;
301 }
302 if (!loop)
303 goto die;
304 }
305 } else { /* zero time specified - reboot NOW */
306 goto die;
307 }
308 printf("--> Press a key on the console to reboot <--\n");
309 cngetc();
310 }
311 }
312die:
313 printf("Rebooting...\n");
314 DELAY(1000000); /* wait 1 sec for printf's to complete and be read */
315 /* cpu_boot(howto); */ /* doesn't do anything at the moment */
316 cpu_reset();
317 for(;;) ;
318 /* NOTREACHED */
319}
320
321/*
322 * Magic number for savecore
323 *
324 * exported (symorder) and used at least by savecore(8)
325 *
326 */
327static u_long const dumpmag = 0x8fca0101UL;
328
329static int dumpsize = 0; /* also for savecore */
330
331static int dodump = 1;
332SYSCTL_INT(_machdep, OID_AUTO, do_dump, CTLFLAG_RW, &dodump, 0, "");
333
334/* ARGSUSED */
335static void dump_conf __P((void *dummy));
336static void
337dump_conf(dummy)
338 void *dummy;
339{
340 cpu_dumpconf();
341}
342SYSINIT(dump_conf, SI_SUB_DUMP_CONF, SI_ORDER_FIRST, dump_conf, NULL)
343
344/*
345 * Doadump comes here after turning off memory management and
346 * getting on the dump stack, either when called above, or by
347 * the auto-restart code.
348 */
349static void
350dumpsys(void)
351{
352
353 if (!dodump)
354 return;
355 if (dumpdev == NODEV)
356 return;
357 if (!(bdevsw[major(dumpdev)]))
358 return;
359 if (!(bdevsw[major(dumpdev)]->d_dump))
360 return;
361 dumpsize = Maxmem;
362 printf("\ndumping to dev %lx, offset %ld\n", (u_long)dumpdev, dumplo);
363 printf("dump ");
364 switch ((*bdevsw[major(dumpdev)]->d_dump)(dumpdev)) {
365
366 case ENXIO:
367 printf("device bad\n");
368 break;
369
370 case EFAULT:
371 printf("device not ready\n");
372 break;
373
374 case EINVAL:
375 printf("area improper\n");
376 break;
377
378 case EIO:
379 printf("i/o error\n");
380 break;
381
382 case EINTR:
383 printf("aborted from console\n");
384 break;
385
386 default:
387 printf("succeeded\n");
388 break;
389 }
390}
391
392/*
393 * Panic is called on unresolvable fatal errors. It prints "panic: mesg",
394 * and then reboots. If we are called twice, then we avoid trying to sync
395 * the disks as this often leads to recursive panics.
396 */
397void
398panic(const char *fmt, ...)
399{
400 int bootopt;
401 va_list ap;
| 40 */
41
42#include "opt_ddb.h"
43#include "opt_hw_wdog.h"
44#include "opt_panic.h"
45#include "opt_show_busybufs.h"
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/buf.h>
50#include <sys/reboot.h>
51#include <sys/proc.h>
52#include <sys/malloc.h>
53#include <sys/kernel.h>
54#include <sys/mount.h>
55#include <sys/sysctl.h>
56#include <sys/conf.h>
57#include <sys/sysproto.h>
58
59#include <machine/pcb.h>
60#include <machine/clock.h>
61#include <machine/cons.h>
62#include <machine/md_var.h>
63#ifdef SMP
64#include <machine/smp.h> /* smp_active, cpuid */
65#endif
66
67#include <sys/signalvar.h>
68
69#ifndef PANIC_REBOOT_WAIT_TIME
70#define PANIC_REBOOT_WAIT_TIME 15 /* default to 15 seconds */
71#endif
72
73/*
74 * Note that stdarg.h and the ANSI style va_start macro is used for both
75 * ANSI and traditional C compilers.
76 */
77#include <machine/stdarg.h>
78
79#ifdef DDB
80#ifdef DDB_UNATTENDED
81static int debugger_on_panic = 0;
82#else
83static int debugger_on_panic = 1;
84#endif
85SYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW,
86 &debugger_on_panic, 0, "");
87#endif
88
89#ifdef HW_WDOG
90/*
91 * If there is a hardware watchdog, point this at the function needed to
92 * hold it off.
93 * It's needed when the kernel needs to do some lengthy operations.
94 * e.g. in wd.c when dumping core.. It's most annoying to have
95 * your precious core-dump only half written because the wdog kicked in.
96 */
97watchdog_tickle_fn wdog_tickler = NULL;
98#endif /* HW_WDOG */
99
100/*
101 * Variable panicstr contains argument to first call to panic; used as flag
102 * to indicate that the kernel has already called panic.
103 */
104const char *panicstr;
105
106/*
107 * callout list for things to do a shutdown
108 */
109typedef struct shutdown_list_element {
110 struct shutdown_list_element *next;
111 bootlist_fn function;
112 void *arg;
113} *sle_p;
114
115/*
116 * there are two shutdown lists. Some things need to be shut down
117 * Earlier than others.
118 */
119static sle_p shutdown_list1;
120static sle_p shutdown_list2;
121
122static void boot __P((int)) __dead2;
123static void dumpsys __P((void));
124
125#ifndef _SYS_SYSPROTO_H_
126struct reboot_args {
127 int opt;
128};
129#endif
130/* ARGSUSED */
131
132/*
133 * The system call that results in a reboot
134 */
135int
136reboot(p, uap)
137 struct proc *p;
138 struct reboot_args *uap;
139{
140 int error;
141
142 if ((error = suser(p->p_ucred, &p->p_acflag)))
143 return (error);
144
145 boot(uap->opt);
146 return (0);
147}
148
149/*
150 * Called by events that want to shut down.. e.g <CTL><ALT><DEL> on a PC
151 */
152void
153shutdown_nice()
154{
155 /* Send a signal to init(8) and have it shutdown the world */
156 if (initproc != NULL) {
157 psignal(initproc, SIGINT);
158 } else {
159 /* No init(8) running, so simply reboot */
160 boot(RB_NOSYNC);
161 }
162 return;
163}
164static int waittime = -1;
165static struct pcb dumppcb;
166
167/*
168 * Go through the rigmarole of shutting down..
169 * this used to be in machdep.c but I'll be dammned if I could see
170 * anything machine dependant in it.
171 */
172static void
173boot(howto)
174 int howto;
175{
176 sle_p ep;
177
178#ifdef SMP
179 if (smp_active) {
180 printf("boot() called on cpu#%d\n", cpuid);
181 }
182#endif
183 /*
184 * Do any callouts that should be done BEFORE syncing the filesystems.
185 */
186 ep = shutdown_list1;
187 while (ep) {
188 shutdown_list1 = ep->next;
189 (*ep->function)(howto, ep->arg);
190 ep = ep->next;
191 }
192
193 /*
194 * Now sync filesystems
195 */
196 if (!cold && (howto & RB_NOSYNC) == 0 && waittime < 0) {
197 register struct buf *bp;
198 int iter, nbusy;
199
200 waittime = 0;
201 printf("\nsyncing disks... ");
202
203 sync(&proc0, NULL);
204
205 /*
206 * With soft updates, some buffers that are
207 * written will be remarked as dirty until other
208 * buffers are written.
209 */
210 for (iter = 0; iter < 20; iter++) {
211 nbusy = 0;
212 for (bp = &buf[nbuf]; --bp >= buf; ) {
213 if ((bp->b_flags & (B_BUSY | B_INVAL)) == B_BUSY) {
214 nbusy++;
215 } else if ((bp->b_flags & (B_DELWRI | B_INVAL))
216 == B_DELWRI) {
217 /* bawrite(bp);*/
218 nbusy++;
219 }
220 }
221 if (nbusy == 0)
222 break;
223 printf("%d ", nbusy);
224 sync(&proc0, NULL);
225 DELAY(50000 * iter);
226 }
227 if (nbusy) {
228 /*
229 * Failed to sync all blocks. Indicate this and don't
230 * unmount filesystems (thus forcing an fsck on reboot).
231 */
232 printf("giving up\n");
233#ifdef SHOW_BUSYBUFS
234 nbusy = 0;
235 for (bp = &buf[nbuf]; --bp >= buf; ) {
236 if ((bp->b_flags & (B_BUSY | B_INVAL)) == B_BUSY) {
237 nbusy++;
238 printf(
239 "%d: dev:%08lx, flags:%08lx, blkno:%ld, lblkno:%ld\n",
240 nbusy, (u_long)bp->b_dev,
241 bp->b_flags, (long)bp->b_blkno,
242 (long)bp->b_lblkno);
243 }
244 }
245 DELAY(5000000); /* 5 seconds */
246#endif
247 } else {
248 printf("done\n");
249 /*
250 * Unmount filesystems
251 */
252 if (panicstr == 0)
253 vfs_unmountall();
254 }
255 DELAY(100000); /* wait for console output to finish */
256 }
257
258 /*
259 * Ok, now do things that assume all filesystem activity has
260 * been completed.
261 */
262 ep = shutdown_list2;
263 while (ep) {
264 shutdown_list2 = ep->next;
265 (*ep->function)(howto, ep->arg);
266 ep = ep->next;
267 }
268 splhigh();
269 if (howto & RB_HALT) {
270 cpu_power_down();
271 printf("\n");
272 printf("The operating system has halted.\n");
273 printf("Please press any key to reboot.\n\n");
274 switch (cngetc()) {
275 case -1: /* No console, just die */
276 cpu_halt();
277 /* NOTREACHED */
278 default:
279 break;
280 }
281 } else {
282 if (howto & RB_DUMP) {
283 if (!cold) {
284 savectx(&dumppcb);
285#ifdef __i386__
286 dumppcb.pcb_cr3 = rcr3();
287#endif
288 dumpsys();
289 }
290
291 if (PANIC_REBOOT_WAIT_TIME != 0) {
292 if (PANIC_REBOOT_WAIT_TIME != -1) {
293 int loop;
294 printf("Automatic reboot in %d seconds - press a key on the console to abort\n",
295 PANIC_REBOOT_WAIT_TIME);
296 for (loop = PANIC_REBOOT_WAIT_TIME * 10; loop > 0; --loop) {
297 DELAY(1000 * 100); /* 1/10th second */
298 /* Did user type a key? */
299 if (cncheckc() != -1)
300 break;
301 }
302 if (!loop)
303 goto die;
304 }
305 } else { /* zero time specified - reboot NOW */
306 goto die;
307 }
308 printf("--> Press a key on the console to reboot <--\n");
309 cngetc();
310 }
311 }
312die:
313 printf("Rebooting...\n");
314 DELAY(1000000); /* wait 1 sec for printf's to complete and be read */
315 /* cpu_boot(howto); */ /* doesn't do anything at the moment */
316 cpu_reset();
317 for(;;) ;
318 /* NOTREACHED */
319}
320
321/*
322 * Magic number for savecore
323 *
324 * exported (symorder) and used at least by savecore(8)
325 *
326 */
327static u_long const dumpmag = 0x8fca0101UL;
328
329static int dumpsize = 0; /* also for savecore */
330
331static int dodump = 1;
332SYSCTL_INT(_machdep, OID_AUTO, do_dump, CTLFLAG_RW, &dodump, 0, "");
333
334/* ARGSUSED */
335static void dump_conf __P((void *dummy));
336static void
337dump_conf(dummy)
338 void *dummy;
339{
340 cpu_dumpconf();
341}
342SYSINIT(dump_conf, SI_SUB_DUMP_CONF, SI_ORDER_FIRST, dump_conf, NULL)
343
344/*
345 * Doadump comes here after turning off memory management and
346 * getting on the dump stack, either when called above, or by
347 * the auto-restart code.
348 */
349static void
350dumpsys(void)
351{
352
353 if (!dodump)
354 return;
355 if (dumpdev == NODEV)
356 return;
357 if (!(bdevsw[major(dumpdev)]))
358 return;
359 if (!(bdevsw[major(dumpdev)]->d_dump))
360 return;
361 dumpsize = Maxmem;
362 printf("\ndumping to dev %lx, offset %ld\n", (u_long)dumpdev, dumplo);
363 printf("dump ");
364 switch ((*bdevsw[major(dumpdev)]->d_dump)(dumpdev)) {
365
366 case ENXIO:
367 printf("device bad\n");
368 break;
369
370 case EFAULT:
371 printf("device not ready\n");
372 break;
373
374 case EINVAL:
375 printf("area improper\n");
376 break;
377
378 case EIO:
379 printf("i/o error\n");
380 break;
381
382 case EINTR:
383 printf("aborted from console\n");
384 break;
385
386 default:
387 printf("succeeded\n");
388 break;
389 }
390}
391
392/*
393 * Panic is called on unresolvable fatal errors. It prints "panic: mesg",
394 * and then reboots. If we are called twice, then we avoid trying to sync
395 * the disks as this often leads to recursive panics.
396 */
397void
398panic(const char *fmt, ...)
399{
400 int bootopt;
401 va_list ap;
|
| 402 static char buf[256];
|
402
403 bootopt = RB_AUTOBOOT | RB_DUMP;
404 if (panicstr)
405 bootopt |= RB_NOSYNC;
406 else
407 panicstr = fmt;
408
| 403
404 bootopt = RB_AUTOBOOT | RB_DUMP;
405 if (panicstr)
406 bootopt |= RB_NOSYNC;
407 else
408 panicstr = fmt;
409
|
409 printf("panic: ");
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410 va_start(ap, fmt);
| 410 va_start(ap, fmt);
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411 vprintf(fmt, ap);
| 411 (void)vsprintf(buf, fmt, ap);
412 if (panicstr == fmt)
413 panicstr = buf;
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412 va_end(ap);
| 414 va_end(ap);
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413 printf("\n");
| 415 printf("panic: %s\n", buf);
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414#ifdef SMP
415 /* three seperate prints in case of an unmapped page and trap */
416 printf("mp_lock = %08x; ", mp_lock);
417 printf("cpuid = %d; ", cpuid);
418 printf("lapic.id = %08x\n", lapic.id);
419#endif
420
421#if defined(DDB)
422 if (debugger_on_panic)
423 Debugger ("panic");
424#endif
425 boot(bootopt);
426}
427
428/*
429 * Two routines to handle adding/deleting items on the
430 * shutdown callout lists
431 *
432 * at_shutdown():
433 * Take the arguments given and put them onto the shutdown callout list.
434 * However first make sure that it's not already there.
435 * returns 0 on success.
436 */
437int
438at_shutdown(bootlist_fn function, void *arg, int position)
439{
440 sle_p ep, *epp;
441
442 switch(position) {
443 case SHUTDOWN_PRE_SYNC:
444 epp = &shutdown_list1;
445 break;
446 case SHUTDOWN_POST_SYNC:
447 epp = &shutdown_list2;
448 break;
449 default:
450 printf("bad exit callout list specified\n");
451 return (EINVAL);
452 }
453 if (rm_at_shutdown(function, arg))
454 printf("exit callout entry already present\n");
455 ep = malloc(sizeof(*ep), M_TEMP, M_NOWAIT);
456 if (ep == NULL)
457 return (ENOMEM);
458 ep->next = *epp;
459 ep->function = function;
460 ep->arg = arg;
461 *epp = ep;
462 return (0);
463}
464
465/*
466 * Scan the exit callout lists for the given items and remove them.
467 * Returns the number of items removed.
468 */
469int
470rm_at_shutdown(bootlist_fn function, void *arg)
471{
472 sle_p *epp, ep;
473 int count;
474
475 count = 0;
476 epp = &shutdown_list1;
477 ep = *epp;
478 while (ep) {
479 if ((ep->function == function) && (ep->arg == arg)) {
480 *epp = ep->next;
481 free(ep, M_TEMP);
482 count++;
483 } else {
484 epp = &ep->next;
485 }
486 ep = *epp;
487 }
488 epp = &shutdown_list2;
489 ep = *epp;
490 while (ep) {
491 if ((ep->function == function) && (ep->arg == arg)) {
492 *epp = ep->next;
493 free(ep, M_TEMP);
494 count++;
495 } else {
496 epp = &ep->next;
497 }
498 ep = *epp;
499 }
500 return (count);
501}
| 416#ifdef SMP
417 /* three seperate prints in case of an unmapped page and trap */
418 printf("mp_lock = %08x; ", mp_lock);
419 printf("cpuid = %d; ", cpuid);
420 printf("lapic.id = %08x\n", lapic.id);
421#endif
422
423#if defined(DDB)
424 if (debugger_on_panic)
425 Debugger ("panic");
426#endif
427 boot(bootopt);
428}
429
430/*
431 * Two routines to handle adding/deleting items on the
432 * shutdown callout lists
433 *
434 * at_shutdown():
435 * Take the arguments given and put them onto the shutdown callout list.
436 * However first make sure that it's not already there.
437 * returns 0 on success.
438 */
439int
440at_shutdown(bootlist_fn function, void *arg, int position)
441{
442 sle_p ep, *epp;
443
444 switch(position) {
445 case SHUTDOWN_PRE_SYNC:
446 epp = &shutdown_list1;
447 break;
448 case SHUTDOWN_POST_SYNC:
449 epp = &shutdown_list2;
450 break;
451 default:
452 printf("bad exit callout list specified\n");
453 return (EINVAL);
454 }
455 if (rm_at_shutdown(function, arg))
456 printf("exit callout entry already present\n");
457 ep = malloc(sizeof(*ep), M_TEMP, M_NOWAIT);
458 if (ep == NULL)
459 return (ENOMEM);
460 ep->next = *epp;
461 ep->function = function;
462 ep->arg = arg;
463 *epp = ep;
464 return (0);
465}
466
467/*
468 * Scan the exit callout lists for the given items and remove them.
469 * Returns the number of items removed.
470 */
471int
472rm_at_shutdown(bootlist_fn function, void *arg)
473{
474 sle_p *epp, ep;
475 int count;
476
477 count = 0;
478 epp = &shutdown_list1;
479 ep = *epp;
480 while (ep) {
481 if ((ep->function == function) && (ep->arg == arg)) {
482 *epp = ep->next;
483 free(ep, M_TEMP);
484 count++;
485 } else {
486 epp = &ep->next;
487 }
488 ep = *epp;
489 }
490 epp = &shutdown_list2;
491 ep = *epp;
492 while (ep) {
493 if ((ep->function == function) && (ep->arg == arg)) {
494 *epp = ep->next;
495 free(ep, M_TEMP);
496 count++;
497 } else {
498 epp = &ep->next;
499 }
500 ep = *epp;
501 }
502 return (count);
503}
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502
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