kern_shutdown.c revision 47084
117658Sjulian/*- 217658Sjulian * Copyright (c) 1986, 1988, 1991, 1993 317658Sjulian * The Regents of the University of California. All rights reserved. 417658Sjulian * (c) UNIX System Laboratories, Inc. 517658Sjulian * All or some portions of this file are derived from material licensed 617658Sjulian * to the University of California by American Telephone and Telegraph 717658Sjulian * Co. or Unix System Laboratories, Inc. and are reproduced herein with 817658Sjulian * the permission of UNIX System Laboratories, Inc. 917658Sjulian * 1017658Sjulian * Redistribution and use in source and binary forms, with or without 1117658Sjulian * modification, are permitted provided that the following conditions 1217658Sjulian * are met: 1317658Sjulian * 1. Redistributions of source code must retain the above copyright 1417658Sjulian * notice, this list of conditions and the following disclaimer. 1517658Sjulian * 2. Redistributions in binary form must reproduce the above copyright 1617658Sjulian * notice, this list of conditions and the following disclaimer in the 1717658Sjulian * documentation and/or other materials provided with the distribution. 1817658Sjulian * 3. All advertising materials mentioning features or use of this software 1917658Sjulian * must display the following acknowledgement: 2017658Sjulian * This product includes software developed by the University of 2117658Sjulian * California, Berkeley and its contributors. 2217658Sjulian * 4. Neither the name of the University nor the names of its contributors 2317658Sjulian * may be used to endorse or promote products derived from this software 2417658Sjulian * without specific prior written permission. 2517658Sjulian * 2617658Sjulian * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2717658Sjulian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2817658Sjulian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2917658Sjulian * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3017658Sjulian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3117658Sjulian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3217658Sjulian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3317658Sjulian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3417658Sjulian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3517658Sjulian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3617658Sjulian * SUCH DAMAGE. 3717658Sjulian * 3817658Sjulian * @(#)kern_shutdown.c 8.3 (Berkeley) 1/21/94 3947084Speter * $Id: kern_shutdown.c,v 1.51 1999/05/08 06:39:38 phk Exp $ 4017658Sjulian */ 4117658Sjulian 4217658Sjulian#include "opt_ddb.h" 4333445Seivind#include "opt_hw_wdog.h" 4428976Sbde#include "opt_panic.h" 4528976Sbde#include "opt_show_busybufs.h" 4617658Sjulian 4717658Sjulian#include <sys/param.h> 4817658Sjulian#include <sys/systm.h> 4931275Sbde#include <sys/buf.h> 5017658Sjulian#include <sys/reboot.h> 5117658Sjulian#include <sys/proc.h> 5241137Smsmith#include <sys/vnode.h> 5317658Sjulian#include <sys/malloc.h> 5417658Sjulian#include <sys/kernel.h> 5521776Sbde#include <sys/mount.h> 5639237Sgibbs#include <sys/queue.h> 5717658Sjulian#include <sys/sysctl.h> 5817658Sjulian#include <sys/conf.h> 5917658Sjulian#include <sys/sysproto.h> 6017658Sjulian 6117658Sjulian#include <machine/pcb.h> 6217658Sjulian#include <machine/clock.h> 6317658Sjulian#include <machine/cons.h> 6417658Sjulian#include <machine/md_var.h> 6526812Speter#ifdef SMP 6626812Speter#include <machine/smp.h> /* smp_active, cpuid */ 6726812Speter#endif 6817658Sjulian 6917658Sjulian#include <sys/signalvar.h> 7017658Sjulian 7117658Sjulian#ifndef PANIC_REBOOT_WAIT_TIME 7217658Sjulian#define PANIC_REBOOT_WAIT_TIME 15 /* default to 15 seconds */ 7317658Sjulian#endif 7417658Sjulian 7517658Sjulian/* 7617658Sjulian * Note that stdarg.h and the ANSI style va_start macro is used for both 7717658Sjulian * ANSI and traditional C compilers. 7817658Sjulian */ 7917658Sjulian#include <machine/stdarg.h> 8017658Sjulian 8128769Sbde#ifdef DDB 8217658Sjulian#ifdef DDB_UNATTENDED 8342135Smsmithint debugger_on_panic = 0; 8417658Sjulian#else 8542135Smsmithint debugger_on_panic = 1; 8617658Sjulian#endif 8717658SjulianSYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW, 8846381Sbillf &debugger_on_panic, 0, "Run debugger on kernel panic"); 8917658Sjulian#endif 9017658Sjulian 9143436SmsmithSYSCTL_NODE(_kern, OID_AUTO, shutdown, CTLFLAG_RW, 0, "Shutdown environment"); 9243436Smsmith 9328000Sjulian#ifdef HW_WDOG 9417658Sjulian/* 9527997Sjulian * If there is a hardware watchdog, point this at the function needed to 9627997Sjulian * hold it off. 9727997Sjulian * It's needed when the kernel needs to do some lengthy operations. 9827997Sjulian * e.g. in wd.c when dumping core.. It's most annoying to have 9927997Sjulian * your precious core-dump only half written because the wdog kicked in. 10027997Sjulian */ 10127997Sjulianwatchdog_tickle_fn wdog_tickler = NULL; 10228000Sjulian#endif /* HW_WDOG */ 10327997Sjulian 10427997Sjulian/* 10517658Sjulian * Variable panicstr contains argument to first call to panic; used as flag 10617658Sjulian * to indicate that the kernel has already called panic. 10717658Sjulian */ 10817658Sjulianconst char *panicstr; 10917658Sjulian 11017658Sjulian/* 11117658Sjulian * callout list for things to do a shutdown 11217658Sjulian */ 11317658Sjuliantypedef struct shutdown_list_element { 11439237Sgibbs LIST_ENTRY(shutdown_list_element) links; 11517658Sjulian bootlist_fn function; 11617658Sjulian void *arg; 11740751Smsmith int priority; 11817658Sjulian} *sle_p; 11917658Sjulian 12017768Sjulian/* 12139237Sgibbs * There are three shutdown lists. Some things need to be shut down 12239237Sgibbs * earlier than others. 12317768Sjulian */ 12439237SgibbsLIST_HEAD(shutdown_list, shutdown_list_element); 12517658Sjulian 12639237Sgibbsstatic struct shutdown_list shutdown_lists[SHUTDOWN_FINAL + 1]; 12739237Sgibbs 12831275Sbdestatic void boot __P((int)) __dead2; 12931275Sbdestatic void dumpsys __P((void)); 13017658Sjulian 13117658Sjulian#ifndef _SYS_SYSPROTO_H_ 13217658Sjulianstruct reboot_args { 13317658Sjulian int opt; 13417658Sjulian}; 13517658Sjulian#endif 13617658Sjulian/* ARGSUSED */ 13717658Sjulian 13817658Sjulian/* 13917658Sjulian * The system call that results in a reboot 14017658Sjulian */ 14117658Sjulianint 14230994Sphkreboot(p, uap) 14317658Sjulian struct proc *p; 14417658Sjulian struct reboot_args *uap; 14517658Sjulian{ 14617658Sjulian int error; 14717658Sjulian 14846112Sphk if ((error = suser(p))) 14917658Sjulian return (error); 15017658Sjulian 15117658Sjulian boot(uap->opt); 15217658Sjulian return (0); 15317658Sjulian} 15417658Sjulian 15517658Sjulian/* 15617658Sjulian * Called by events that want to shut down.. e.g <CTL><ALT><DEL> on a PC 15717658Sjulian */ 15817658Sjulianvoid 15928769Sbdeshutdown_nice() 16017658Sjulian{ 16117658Sjulian /* Send a signal to init(8) and have it shutdown the world */ 16217658Sjulian if (initproc != NULL) { 16317658Sjulian psignal(initproc, SIGINT); 16417658Sjulian } else { 16517658Sjulian /* No init(8) running, so simply reboot */ 16617658Sjulian boot(RB_NOSYNC); 16717658Sjulian } 16817658Sjulian return; 16917658Sjulian} 17017658Sjulianstatic int waittime = -1; 17117658Sjulianstatic struct pcb dumppcb; 17217658Sjulian 17317658Sjulian/* 17417658Sjulian * Go through the rigmarole of shutting down.. 17517658Sjulian * this used to be in machdep.c but I'll be dammned if I could see 17617658Sjulian * anything machine dependant in it. 17717658Sjulian */ 17831275Sbdestatic void 17917658Sjulianboot(howto) 18017658Sjulian int howto; 18117658Sjulian{ 18217768Sjulian sle_p ep; 18317658Sjulian 18425164Speter#ifdef SMP 18525164Speter if (smp_active) { 18626812Speter printf("boot() called on cpu#%d\n", cpuid); 18725164Speter } 18825164Speter#endif 18927997Sjulian /* 19027997Sjulian * Do any callouts that should be done BEFORE syncing the filesystems. 19127997Sjulian */ 19239237Sgibbs LIST_FOREACH(ep, &shutdown_lists[SHUTDOWN_PRE_SYNC], links) 19317658Sjulian (*ep->function)(howto, ep->arg); 19427997Sjulian 19527997Sjulian /* 19627997Sjulian * Now sync filesystems 19727997Sjulian */ 19817658Sjulian if (!cold && (howto & RB_NOSYNC) == 0 && waittime < 0) { 19917658Sjulian register struct buf *bp; 20017658Sjulian int iter, nbusy; 20117658Sjulian 20217658Sjulian waittime = 0; 20317658Sjulian printf("\nsyncing disks... "); 20417658Sjulian 20530994Sphk sync(&proc0, NULL); 20617658Sjulian 20734266Sjulian /* 20834266Sjulian * With soft updates, some buffers that are 20934266Sjulian * written will be remarked as dirty until other 21034266Sjulian * buffers are written. 21134266Sjulian */ 21217658Sjulian for (iter = 0; iter < 20; iter++) { 21317658Sjulian nbusy = 0; 21417658Sjulian for (bp = &buf[nbuf]; --bp >= buf; ) { 21539237Sgibbs if ((bp->b_flags & (B_BUSY | B_INVAL)) 21639237Sgibbs == B_BUSY) { 21717658Sjulian nbusy++; 21834266Sjulian } else if ((bp->b_flags & (B_DELWRI | B_INVAL)) 21934266Sjulian == B_DELWRI) { 22034266Sjulian /* bawrite(bp);*/ 22134266Sjulian nbusy++; 22217658Sjulian } 22317658Sjulian } 22417658Sjulian if (nbusy == 0) 22517658Sjulian break; 22617658Sjulian printf("%d ", nbusy); 22734266Sjulian sync(&proc0, NULL); 22834266Sjulian DELAY(50000 * iter); 22917658Sjulian } 23041137Smsmith /* 23141137Smsmith * Count only busy local buffers to prevent forcing 23241137Smsmith * a fsck if we're just a client of a wedged NFS server 23341137Smsmith */ 23441137Smsmith nbusy = 0; 23541137Smsmith for (bp = &buf[nbuf]; --bp >= buf; ) { 23646568Speter if (((bp->b_flags & (B_BUSY | B_INVAL)) == B_BUSY) || 23746568Speter ((bp->b_flags & (B_DELWRI | B_INVAL))== B_DELWRI)) { 23841137Smsmith if(bp->b_dev == NODEV) 23941137Smsmith CIRCLEQ_REMOVE(&mountlist, bp->b_vp->v_mount, mnt_list); 24041137Smsmith else 24141137Smsmith nbusy++; 24246568Speter } 24341137Smsmith 24441137Smsmith 24541137Smsmith } 24617658Sjulian if (nbusy) { 24717658Sjulian /* 24817658Sjulian * Failed to sync all blocks. Indicate this and don't 24917658Sjulian * unmount filesystems (thus forcing an fsck on reboot). 25017658Sjulian */ 25117658Sjulian printf("giving up\n"); 25217658Sjulian#ifdef SHOW_BUSYBUFS 25317658Sjulian nbusy = 0; 25417658Sjulian for (bp = &buf[nbuf]; --bp >= buf; ) { 25539237Sgibbs if ((bp->b_flags & (B_BUSY | B_INVAL)) 25639237Sgibbs == B_BUSY) { 25717658Sjulian nbusy++; 25837555Sbde printf( 25937555Sbde "%d: dev:%08lx, flags:%08lx, blkno:%ld, lblkno:%ld\n", 26037555Sbde nbusy, (u_long)bp->b_dev, 26137555Sbde bp->b_flags, (long)bp->b_blkno, 26237555Sbde (long)bp->b_lblkno); 26317658Sjulian } 26417658Sjulian } 26517658Sjulian DELAY(5000000); /* 5 seconds */ 26617658Sjulian#endif 26717658Sjulian } else { 26817658Sjulian printf("done\n"); 26917658Sjulian /* 27017658Sjulian * Unmount filesystems 27117658Sjulian */ 27217658Sjulian if (panicstr == 0) 27317658Sjulian vfs_unmountall(); 27417658Sjulian } 27539237Sgibbs DELAY(100000); /* wait for console output to finish */ 27617658Sjulian } 27727997Sjulian 27827997Sjulian /* 27927997Sjulian * Ok, now do things that assume all filesystem activity has 28027997Sjulian * been completed. 28127997Sjulian */ 28239237Sgibbs LIST_FOREACH(ep, &shutdown_lists[SHUTDOWN_POST_SYNC], links) 28317768Sjulian (*ep->function)(howto, ep->arg); 28439237Sgibbs splhigh(); 28539522Sdt if ((howto & (RB_HALT|RB_DUMP)) == RB_DUMP && !cold) { 28639237Sgibbs savectx(&dumppcb); 28739237Sgibbs#ifdef __i386__ 28839237Sgibbs dumppcb.pcb_cr3 = rcr3(); 28939237Sgibbs#endif 29039237Sgibbs dumpsys(); 29117768Sjulian } 29239237Sgibbs 29339237Sgibbs /* Now that we're going to really halt the system... */ 29439237Sgibbs LIST_FOREACH(ep, &shutdown_lists[SHUTDOWN_FINAL], links) 29539237Sgibbs (*ep->function)(howto, ep->arg); 29639237Sgibbs 29717658Sjulian if (howto & RB_HALT) { 29817658Sjulian printf("\n"); 29917658Sjulian printf("The operating system has halted.\n"); 30017658Sjulian printf("Please press any key to reboot.\n\n"); 30119274Sjulian switch (cngetc()) { 30219274Sjulian case -1: /* No console, just die */ 30319274Sjulian cpu_halt(); 30419274Sjulian /* NOTREACHED */ 30519274Sjulian default: 30639237Sgibbs howto &= ~RB_HALT; 30719274Sjulian break; 30819274Sjulian } 30939237Sgibbs } else if (howto & RB_DUMP) { 31039237Sgibbs /* System Paniced */ 31117658Sjulian 31239237Sgibbs if (PANIC_REBOOT_WAIT_TIME != 0) { 31339237Sgibbs if (PANIC_REBOOT_WAIT_TIME != -1) { 31439237Sgibbs int loop; 31539237Sgibbs printf("Automatic reboot in %d seconds - " 31639237Sgibbs "press a key on the console to abort\n", 31739237Sgibbs PANIC_REBOOT_WAIT_TIME); 31839237Sgibbs for (loop = PANIC_REBOOT_WAIT_TIME * 10; 31939237Sgibbs loop > 0; --loop) { 32039237Sgibbs DELAY(1000 * 100); /* 1/10th second */ 32139237Sgibbs /* Did user type a key? */ 32239237Sgibbs if (cncheckc() != -1) 32339237Sgibbs break; 32417658Sjulian } 32539237Sgibbs if (!loop) 32639237Sgibbs goto die; 32717658Sjulian } 32839237Sgibbs } else { /* zero time specified - reboot NOW */ 32939237Sgibbs goto die; 33017658Sjulian } 33139237Sgibbs printf("--> Press a key on the console to reboot <--\n"); 33239237Sgibbs cngetc(); 33317658Sjulian } 33417658Sjuliandie: 33517658Sjulian printf("Rebooting...\n"); 33617658Sjulian DELAY(1000000); /* wait 1 sec for printf's to complete and be read */ 33717677Sjulian /* cpu_boot(howto); */ /* doesn't do anything at the moment */ 33817658Sjulian cpu_reset(); 33917658Sjulian for(;;) ; 34017658Sjulian /* NOTREACHED */ 34117658Sjulian} 34217658Sjulian 34317658Sjulian/* 34417658Sjulian * Magic number for savecore 34517658Sjulian * 34617658Sjulian * exported (symorder) and used at least by savecore(8) 34717658Sjulian * 34817658Sjulian */ 34917658Sjulianstatic u_long const dumpmag = 0x8fca0101UL; 35017658Sjulian 35117658Sjulianstatic int dumpsize = 0; /* also for savecore */ 35217658Sjulian 35317658Sjulianstatic int dodump = 1; 35446381SbillfSYSCTL_INT(_machdep, OID_AUTO, do_dump, CTLFLAG_RW, 35546381Sbillf &dodump, 0, "Do coredump on kernel panic"); 35617658Sjulian 35731403Sjulian/* ARGSUSED */ 35831403Sjulianstatic void dump_conf __P((void *dummy)); 35931403Sjulianstatic void 36031403Sjuliandump_conf(dummy) 36131403Sjulian void *dummy; 36231403Sjulian{ 36331403Sjulian cpu_dumpconf(); 36431403Sjulian} 36531403SjulianSYSINIT(dump_conf, SI_SUB_DUMP_CONF, SI_ORDER_FIRST, dump_conf, NULL) 36631403Sjulian 36717658Sjulian/* 36817658Sjulian * Doadump comes here after turning off memory management and 36917658Sjulian * getting on the dump stack, either when called above, or by 37017658Sjulian * the auto-restart code. 37117658Sjulian */ 37217658Sjulianstatic void 37317658Sjuliandumpsys(void) 37417658Sjulian{ 37517658Sjulian 37617658Sjulian if (!dodump) 37717658Sjulian return; 37817658Sjulian if (dumpdev == NODEV) 37917658Sjulian return; 38046676Sphk if (!(bdevsw(dumpdev))) 38117658Sjulian return; 38246676Sphk if (!(bdevsw(dumpdev)->d_dump)) 38317658Sjulian return; 38417658Sjulian dumpsize = Maxmem; 38547084Speter printf("\ndumping to dev (%d,%d), offset %ld\n", 38647084Speter major(dumpdev), minor(dumpdev), dumplo); 38717658Sjulian printf("dump "); 38846676Sphk switch ((*bdevsw(dumpdev)->d_dump)(dumpdev)) { 38917658Sjulian 39017658Sjulian case ENXIO: 39117658Sjulian printf("device bad\n"); 39217658Sjulian break; 39317658Sjulian 39417658Sjulian case EFAULT: 39517658Sjulian printf("device not ready\n"); 39617658Sjulian break; 39717658Sjulian 39817658Sjulian case EINVAL: 39917658Sjulian printf("area improper\n"); 40017658Sjulian break; 40117658Sjulian 40217658Sjulian case EIO: 40317658Sjulian printf("i/o error\n"); 40417658Sjulian break; 40517658Sjulian 40617658Sjulian case EINTR: 40717658Sjulian printf("aborted from console\n"); 40817658Sjulian break; 40917658Sjulian 41017658Sjulian default: 41117658Sjulian printf("succeeded\n"); 41217658Sjulian break; 41317658Sjulian } 41417658Sjulian} 41517658Sjulian 41617658Sjulian/* 41717658Sjulian * Panic is called on unresolvable fatal errors. It prints "panic: mesg", 41817658Sjulian * and then reboots. If we are called twice, then we avoid trying to sync 41917658Sjulian * the disks as this often leads to recursive panics. 42017658Sjulian */ 42117658Sjulianvoid 42217658Sjulianpanic(const char *fmt, ...) 42317658Sjulian{ 42417658Sjulian int bootopt; 42517658Sjulian va_list ap; 42638874Sache static char buf[256]; 42717658Sjulian 42817658Sjulian bootopt = RB_AUTOBOOT | RB_DUMP; 42917658Sjulian if (panicstr) 43017658Sjulian bootopt |= RB_NOSYNC; 43117658Sjulian else 43217658Sjulian panicstr = fmt; 43317658Sjulian 43417658Sjulian va_start(ap, fmt); 43541514Sarchie (void)vsnprintf(buf, sizeof(buf), fmt, ap); 43638874Sache if (panicstr == fmt) 43738874Sache panicstr = buf; 43817658Sjulian va_end(ap); 43938874Sache printf("panic: %s\n", buf); 44026100Sfsmp#ifdef SMP 44129128Speter /* three seperate prints in case of an unmapped page and trap */ 44229128Speter printf("mp_lock = %08x; ", mp_lock); 44329128Speter printf("cpuid = %d; ", cpuid); 44429128Speter printf("lapic.id = %08x\n", lapic.id); 44526100Sfsmp#endif 44617658Sjulian 44717658Sjulian#if defined(DDB) 44817658Sjulian if (debugger_on_panic) 44917658Sjulian Debugger ("panic"); 45017658Sjulian#endif 45117658Sjulian boot(bootopt); 45217658Sjulian} 45317658Sjulian 45417768Sjulian/* 45540751Smsmith * Three routines to handle adding/deleting items on the 45617768Sjulian * shutdown callout lists 45717768Sjulian * 45817768Sjulian * at_shutdown(): 45917658Sjulian * Take the arguments given and put them onto the shutdown callout list. 46017658Sjulian * However first make sure that it's not already there. 46117658Sjulian * returns 0 on success. 46217658Sjulian */ 46317658Sjulianint 46439237Sgibbsat_shutdown(bootlist_fn function, void *arg, int queue) 46517658Sjulian{ 46640751Smsmith return(at_shutdown_pri(function, arg, queue, SHUTDOWN_PRI_DEFAULT)); 46740751Smsmith} 46817768Sjulian 46940751Smsmith/* 47040751Smsmith * at_shutdown_pri(): 47140751Smsmith * Take the arguments given and put them onto the shutdown callout list 47240751Smsmith * with the given execution priority. 47340751Smsmith * returns 0 on success. 47440751Smsmith */ 47540751Smsmithint 47640751Smsmithat_shutdown_pri(bootlist_fn function, void *arg, int queue, int pri) 47740751Smsmith{ 47843436Smsmith sle_p op, ep, ip; 47940751Smsmith 48039237Sgibbs if (queue < SHUTDOWN_PRE_SYNC 48139237Sgibbs || queue > SHUTDOWN_FINAL) { 48239237Sgibbs printf("at_shutdown: bad exit callout queue %d specified\n", 48339237Sgibbs queue); 48417768Sjulian return (EINVAL); 48517768Sjulian } 48617768Sjulian if (rm_at_shutdown(function, arg)) 48739237Sgibbs printf("at_shutdown: exit callout entry was already present\n"); 48817768Sjulian ep = malloc(sizeof(*ep), M_TEMP, M_NOWAIT); 48917768Sjulian if (ep == NULL) 49017768Sjulian return (ENOMEM); 49117658Sjulian ep->function = function; 49217658Sjulian ep->arg = arg; 49340751Smsmith ep->priority = pri; 49440751Smsmith 49540751Smsmith /* Sort into list of items on this queue */ 49640751Smsmith ip = LIST_FIRST(&shutdown_lists[queue]); 49740751Smsmith if (ip == NULL) { 49840751Smsmith LIST_INSERT_HEAD(&shutdown_lists[queue], ep, links); 49940751Smsmith } else { 50043436Smsmith for (; ip != NULL; op = ip, ip = LIST_NEXT(ip, links)) { 50140751Smsmith if (ep->priority < ip->priority) { 50240751Smsmith LIST_INSERT_BEFORE(ip, ep, links); 50340751Smsmith ep = NULL; 50440751Smsmith break; 50540751Smsmith } 50640751Smsmith } 50740751Smsmith if (ep != NULL) 50843436Smsmith LIST_INSERT_AFTER(op, ep, links); 50940751Smsmith } 51017768Sjulian return (0); 51117658Sjulian} 51217768Sjulian 51317658Sjulian/* 51417768Sjulian * Scan the exit callout lists for the given items and remove them. 51517658Sjulian * Returns the number of items removed. 51617658Sjulian */ 51717658Sjulianint 51817658Sjulianrm_at_shutdown(bootlist_fn function, void *arg) 51917658Sjulian{ 52039237Sgibbs sle_p ep; 52139237Sgibbs int count; 52239237Sgibbs int queue; 52317658Sjulian 52417768Sjulian count = 0; 52539237Sgibbs for (queue = SHUTDOWN_PRE_SYNC; queue < SHUTDOWN_FINAL; queue++) { 52639237Sgibbs LIST_FOREACH(ep, &shutdown_lists[queue], links) { 52739237Sgibbs if ((ep->function == function) && (ep->arg == arg)) { 52839237Sgibbs LIST_REMOVE(ep, links); 52939237Sgibbs free(ep, M_TEMP); 53039237Sgibbs count++; 53139237Sgibbs } 53217658Sjulian } 53317658Sjulian } 53417768Sjulian return (count); 53517658Sjulian} 53643436Smsmith 53743436Smsmith/* 53843436Smsmith * Support for poweroff delay. 53943436Smsmith */ 54043436Smsmithstatic int poweroff_delay = 0; 54143436SmsmithSYSCTL_INT(_kern_shutdown, OID_AUTO, poweroff_delay, CTLFLAG_RW, 54243436Smsmith &poweroff_delay, 0, ""); 54343436Smsmith 54443436Smsmithstatic void poweroff_wait(int howto, void *unused) 54543436Smsmith{ 54643436Smsmith if(!(howto & RB_POWEROFF) || poweroff_delay <= 0) 54743436Smsmith return; 54843436Smsmith DELAY(poweroff_delay * 1000); 54943436Smsmith} 55043436Smsmith 55143436Smsmith/* 55243436Smsmith * XXX OK? This implies I know SHUTDOWN_PRI_LAST > SHUTDOWN_PRI_FIRST 55343436Smsmith */ 55443436Smsmithstatic void poweroff_conf(void *unused) 55543436Smsmith{ 55643436Smsmith at_shutdown_pri(poweroff_wait, NULL, SHUTDOWN_FINAL, SHUTDOWN_PRI_FIRST); 55743436Smsmith} 55843436Smsmith 55943436SmsmithSYSINIT(poweroff_conf, SI_SUB_INTRINSIC, SI_ORDER_ANY, poweroff_conf, NULL) 560