123 lines
3.7 KiB
C
123 lines
3.7 KiB
C
/* $NetBSD: kern_reboot.c,v 1.5 2024/03/05 14:15:36 thorpej Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kern_xxx.c 8.3 (Berkeley) 2/14/95
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* from: NetBSD: kern_xxx.c,v 1.74 2017/10/28 00:37:11 pgoyette Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kern_reboot.c,v 1.5 2024/03/05 14:15:36 thorpej Exp $");
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#include <sys/atomic.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/reboot.h>
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#include <sys/syscall.h>
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#include <sys/syscallargs.h>
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#include <sys/kernel.h>
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#include <sys/kauth.h>
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#include <sys/timevar.h>
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/*
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* Reboot / shutdown the system.
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*/
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void
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kern_reboot(int howto, char *bootstr)
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{
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static lwp_t *rebooter;
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lwp_t *l;
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/*
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* If already rebooting then just hang out. Allow reentry for the
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* benfit of ddb, even if questionable. It would be better to call
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* exit1(), but this is called from all sorts of places.
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*/
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l = atomic_cas_ptr(&rebooter, NULL, curlwp);
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while (l != NULL && l != curlwp) {
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(void)kpause("reboot", true, 0, NULL);
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}
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shutting_down = 1;
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/* Just cut to the chase if cold. */
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if (cold) {
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goto do_cpu_reboot;
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}
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if ((boothowto & RB_NOSYNC) == 0 && panicstr == NULL) {
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/*
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* If we've been adjusting the clock, the todr
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* will be out of synch; adjust it now.
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*/
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if (time_adjusted != 0) {
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time_adjusted = 0;
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resettodr();
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}
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}
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/*
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* XXX We should re-factor out all of the common stuff
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* that each and every cpu_reboot() does and put it here.
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*/
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do_cpu_reboot:
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cpu_reboot(howto, bootstr);
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}
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/* ARGSUSED */
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int
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sys_reboot(struct lwp *l, const struct sys_reboot_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) opt;
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syscallarg(char *) bootstr;
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} */
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int error;
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char *bootstr, bs[128];
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if ((error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_REBOOT,
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0, NULL, NULL, NULL)) != 0)
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return (error);
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/*
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* Only use the boot string if RB_STRING is set.
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*/
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if ((SCARG(uap, opt) & RB_STRING) &&
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(error = copyinstr(SCARG(uap, bootstr), bs, sizeof(bs), 0)) == 0)
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bootstr = bs;
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else
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bootstr = NULL;
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/*
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* Not all ports use the bootstr currently.
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*/
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kern_reboot(SCARG(uap, opt), bootstr);
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return (0);
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}
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