[apple/xnu.git] / bsd / kern / kern_shutdown.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 *	File:	bsd/kern/kern_shutdown.c
 *
 *	Copyright (C) 1989, NeXT, Inc.
 *
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/vm.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/clist.h>
#include <sys/callout.h>
#include <sys/mbuf.h>
#include <sys/msgbuf.h>
#include <sys/ioctl.h>
#include <sys/signal.h>
#include <sys/tty.h>
#include <kern/task.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#if	NCPUS > 1
#include <kern/processor.h>
#include <kern/thread.h>
#include <sys/lock.h>
#endif	/* NCPUS > 1 */
#include <vm/vm_kern.h>
#include <mach/vm_param.h>
#include <sys/filedesc.h>
#include <mach/host_reboot.h>

int	waittime = -1;

void
boot(paniced, howto, command)
	int paniced, howto;
	char *command;
{
	register int i;
	int s;
	struct proc *p = current_proc();	/* XXX */
	int hostboot_option=0;
	int funnel_state;

	static void proc_shutdown();
    extern void md_prepare_for_shutdown(int paniced, int howto, char * command);

	funnel_state = thread_funnel_set(kernel_flock, TRUE);

	md_prepare_for_shutdown(paniced, howto, command);

	if ((howto&RB_NOSYNC)==0 && waittime < 0) {
		int iter, nbusy;

		waittime = 0;
		
		printf("syncing disks... ");

		/*
		 * Release vnodes held by texts before sync.
		 */

		/* handle live procs (deallocate their root and current directories). */		
		proc_shutdown();

		sync(p, (void *)NULL, (int *)NULL);

		/* Release vnodes from the VM object cache */	 
		ubc_unmountall();

		IOSleep( 1 * 1000 );

		/*
		 * Unmount filesystems
		 */
		if (panicstr == 0)
			vfs_unmountall();

		/* Wait for the buffer cache to clean remaining dirty buffers */
		for (iter = 0; iter < 20; iter++) {
			nbusy = count_busy_buffers();
			if (nbusy == 0)
				break;
			printf("%d ", nbusy);
			IOSleep( 4 * nbusy );
		}
		if (nbusy)
			printf("giving up\n");
		else
			printf("done\n");
	}

	/*
	 * Can't just use an splnet() here to disable the network
	 * because that will lock out softints which the disk
	 * drivers depend on to finish DMAs.
	 */
	if_down_all();

	if (howto & RB_POWERDOWN)
		hostboot_option = HOST_REBOOT_HALT;
	if (howto & RB_HALT)
		hostboot_option = HOST_REBOOT_HALT;
	if (paniced == RB_PANIC)
		hostboot_option = HOST_REBOOT_HALT;

	if (hostboot_option == HOST_REBOOT_HALT)
	        IOSleep( 1 * 1000 );

	host_reboot(host_priv_self(), hostboot_option);

	thread_funnel_set(kernel_flock, FALSE);
}

/*
 * proc_shutdown()
 *
 *	Shutdown down proc system (release references to current and root
 *	dirs for each process).
 *
 * POSIX modifications:
 *
 *	For POSIX fcntl() file locking call vno_lockrelease() on 
 *	the file to release all of its record locks, if any.
 */

static void
proc_shutdown()
{
	struct proc	*p, *self;
	struct vnode	**cdirp, **rdirp, *vp;
	int		restart, i, TERM_catch;

	/*
	 *	Kill as many procs as we can.  (Except ourself...)
	 */
	self = (struct proc *)current_proc();
	
	/*
	 * Suspend /etc/init
	 */
	p = pfind(1);
	if (p && p != self)
		task_suspend(p->task);		/* stop init */

	/*
	 * Suspend mach_init
	 */
	p = pfind(2);
	if (p && p != self)
		task_suspend(p->task);		/* stop mach_init */

	printf("Killing all processes ");

	/*
	 * send SIGTERM to those procs interested in catching one
	 */
	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
	        if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self)) {
		        if (p->p_sigcatch & sigmask(SIGTERM))
			        psignal(p, SIGTERM);
		}
	}
	/*
	 * now wait for up to 30 seconds to allow those procs catching SIGTERM
	 * to digest it
	 * as soon as these procs have exited, we'll continue on to the next step
	 */
	for (i = 0; i < 300; i++) {
	        /*
		 * sleep for a tenth of a second
		 * and then check to see if the tasks that were sent a
		 * SIGTERM have exited
		 */
	        IOSleep(100);   
		TERM_catch = 0;

	        for (p = allproc.lh_first; p; p = p->p_list.le_next) {
		        if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self)) {
			        if (p->p_sigcatch & sigmask(SIGTERM))
				        TERM_catch++;
			}
		}
		if (TERM_catch == 0)
		        break;
	}

	/*
	 * send a SIGKILL to all the procs still hanging around
	 */
	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
	        if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self))
		        psignal(p, SIGKILL);
	}
	/*
	 * wait for up to 60 seconds to allow these procs to exit normally
	 */
	for (i = 0; i < 300; i++) {
		IOSleep(200);  /* double the time from 100 to 200 for NFS requests in particular */

	        for (p = allproc.lh_first; p; p = p->p_list.le_next) {
		        if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self))
			        break;
		}
		if (!p)
		        break;
	}

	/*
	 * if we still have procs that haven't exited, then brute force 'em
	 */
	p = allproc.lh_first;
	while (p) {
	        if ((p->p_flag&P_SYSTEM) || (p->p_pptr->p_pid == 0) || (p == self)) {
		        p = p->p_list.le_next;
		}
		else {
		        /*
			 * NOTE: following code ignores sig_lock and plays
			 * with exit_thread correctly.  This is OK unless we
			 * are a multiprocessor, in which case I do not
			 * understand the sig_lock.  This needs to be fixed.
			 * XXX
			 */
		        if (p->exit_thread) {	/* someone already doing it */
			        thread_block(0);/* give him a chance */
			}
			else {
			        p->exit_thread = current_thread();
				printf(".");
				exit1(p, 1, (int *)NULL);
			}
			p = allproc.lh_first;
		}
	}
	printf("\n");
	/*
	 *	Forcibly free resources of what's left.
	 */
	p = allproc.lh_first;
	while (p) {
	/*
	 * Close open files and release open-file table.
	 * This may block!
	 */
#ifdef notyet
	/* panics on reboot due to "zfree: non-allocated memory in collectable zone" message */
	fdfree(p);
#endif /* notyet */
	p = p->p_list.le_next;
	}
	/* Wait for the reaper thread to run, and clean up what we have done 
	 * before we proceed with the hardcore shutdown. This reduces the race
	 * between kill_tasks and the reaper thread.
	 */
	/* thread_wakeup(&reaper_queue); */
	/*	IOSleep( 1 * 1000);      */
	printf("continuing\n");
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* File: bsd/kern/kern_shutdown.c
	24	*
	25	* Copyright (C) 1989, NeXT, Inc.
	26	*
	27	*/
	28
	29	#include <sys/param.h>
	30	#include <sys/systm.h>
	31	#include <sys/kernel.h>
	32	#include <sys/vm.h>
	33	#include <sys/proc.h>
	34	#include <sys/user.h>
	35	#include <sys/buf.h>
	36	#include <sys/reboot.h>
	37	#include <sys/conf.h>
	38	#include <sys/vnode.h>
	39	#include <sys/file.h>
	40	#include <sys/clist.h>
	41	#include <sys/callout.h>
	42	#include <sys/mbuf.h>
	43	#include <sys/msgbuf.h>
	44	#include <sys/ioctl.h>
	45	#include <sys/signal.h>
	46	#include <sys/tty.h>
	47	#include <kern/task.h>
	48	#include <ufs/ufs/quota.h>
	49	#include <ufs/ufs/inode.h>
	50	#if NCPUS > 1
	51	#include <kern/processor.h>
	52	#include <kern/thread.h>
	53	#include <sys/lock.h>
	54	#endif /* NCPUS > 1 */
	55	#include <vm/vm_kern.h>
	56	#include <mach/vm_param.h>
	57	#include <sys/filedesc.h>
	58	#include <mach/host_reboot.h>
	59
	60	int waittime = -1;
	61
	62	void
	63	boot(paniced, howto, command)
	64	int paniced, howto;
65	char *command;
66	{
67	register int i;
68	int s;
69	struct proc p = current_proc(); / XXX */
70	int hostboot_option=0;
71	int funnel_state;
72
0b4e3aa0 A	73	static void proc_shutdown();
0b4e3aa0 A	74	extern void md_prepare_for_shutdown(int paniced, int howto, char * command);
1c79356b A	75
	76	funnel_state = thread_funnel_set(kernel_flock, TRUE);
	77
0b4e3aa0	78	md_prepare_for_shutdown(paniced, howto, command);
1c79356b A	79
	80	if ((howto&RB_NOSYNC)==0 && waittime < 0) {
	81	int iter, nbusy;
	82
	83	waittime = 0;
	84
	85	printf("syncing disks... ");
	86
	87	/*
	88	* Release vnodes held by texts before sync.
	89	*/
	90
	91	/* handle live procs (deallocate their root and current directories). */
	92	proc_shutdown();
	93
	94	sync(p, (void )NULL, (int )NULL);
	95
	96	/* Release vnodes from the VM object cache */
	97	ubc_unmountall();
	98
	99	IOSleep( 1 * 1000 );
	100
	101	/*
	102	* Unmount filesystems
	103	*/
	104	if (panicstr == 0)
	105	vfs_unmountall();
	106
	107	/* Wait for the buffer cache to clean remaining dirty buffers */
	108	for (iter = 0; iter < 20; iter++) {
	109	nbusy = count_busy_buffers();
	110	if (nbusy == 0)
	111	break;
	112	printf("%d ", nbusy);
	113	IOSleep( 4 * nbusy );
	114	}
	115	if (nbusy)
	116	printf("giving up\n");
	117	else
	118	printf("done\n");
	119	}
	120
	121	/*
	122	* Can't just use an splnet() here to disable the network
	123	* because that will lock out softints which the disk
	124	* drivers depend on to finish DMAs.
	125	*/
	126	if_down_all();
	127
	128	if (howto & RB_POWERDOWN)
	129	hostboot_option = HOST_REBOOT_HALT;
	130	if (howto & RB_HALT)
	131	hostboot_option = HOST_REBOOT_HALT;
	132	if (paniced == RB_PANIC)
	133	hostboot_option = HOST_REBOOT_HALT;
	134
	135	if (hostboot_option == HOST_REBOOT_HALT)
	136	IOSleep( 1 * 1000 );
	137
	138	host_reboot(host_priv_self(), hostboot_option);
	139
	140	thread_funnel_set(kernel_flock, FALSE);
	141	}
	142
143	/*
144	* proc_shutdown()
145	*
146	* Shutdown down proc system (release references to current and root
147	* dirs for each process).
148	*
149	* POSIX modifications:
150	*
151	* For POSIX fcntl() file locking call vno_lockrelease() on
152	* the file to release all of its record locks, if any.
153	*/
154
155	static void
156	proc_shutdown()
157	{
158	struct proc p, self;
159	struct vnode cdirp, rdirp, *vp;
160	int restart, i, TERM_catch;
161
162	/*
163	* Kill as many procs as we can. (Except ourself...)
164	*/
0b4e3aa0	165	self = (struct proc *)current_proc();
1c79356b A	166
	167	/*
	168	* Suspend /etc/init
	169	*/
	170	p = pfind(1);
	171	if (p && p != self)
	172	task_suspend(p->task); /* stop init */
	173
	174	/*
	175	* Suspend mach_init
	176	*/
	177	p = pfind(2);
	178	if (p && p != self)
	179	task_suspend(p->task); /* stop mach_init */
	180
	181	printf("Killing all processes ");
	182
	183	/*
	184	* send SIGTERM to those procs interested in catching one
	185	*/
	186	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
	187	if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self)) {
	188	if (p->p_sigcatch & sigmask(SIGTERM))
	189	psignal(p, SIGTERM);
	190	}
	191	}
	192	/*
	193	* now wait for up to 30 seconds to allow those procs catching SIGTERM
	194	* to digest it
	195	* as soon as these procs have exited, we'll continue on to the next step
	196	*/
	197	for (i = 0; i < 300; i++) {
	198	/*
	199	* sleep for a tenth of a second
	200	* and then check to see if the tasks that were sent a
	201	* SIGTERM have exited
	202	*/
	203	IOSleep(100);
	204	TERM_catch = 0;
	205
	206	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
	207	if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self)) {
	208	if (p->p_sigcatch & sigmask(SIGTERM))
	209	TERM_catch++;
	210	}
	211	}
	212	if (TERM_catch == 0)
	213	break;
	214	}
	215
	216	/*
	217	* send a SIGKILL to all the procs still hanging around
	218	*/
	219	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
	220	if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self))
	221	psignal(p, SIGKILL);
	222	}
	223	/*
	224	* wait for up to 60 seconds to allow these procs to exit normally
	225	*/
	226	for (i = 0; i < 300; i++) {
	227	IOSleep(200); /* double the time from 100 to 200 for NFS requests in particular */
	228
	229	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
230	if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self))
231	break;
232	}
233	if (!p)
234	break;
235	}
236
237	/*
238	* if we still have procs that haven't exited, then brute force 'em
239	*/
240	p = allproc.lh_first;
241	while (p) {
242	if ((p->p_flag&P_SYSTEM) \|\| (p->p_pptr->p_pid == 0) \|\| (p == self)) {
243	p = p->p_list.le_next;
244	}
245	else {
246	/*
247	* NOTE: following code ignores sig_lock and plays
248	* with exit_thread correctly. This is OK unless we
249	* are a multiprocessor, in which case I do not
250	* understand the sig_lock. This needs to be fixed.
251	* XXX
252	*/
253	if (p->exit_thread) { /* someone already doing it */
254	thread_block(0);/* give him a chance */
255	}
256	else {
257	p->exit_thread = current_thread();
258	printf(".");
0b4e3aa0	259	exit1(p, 1, (int *)NULL);
1c79356b A	260	}
	261	p = allproc.lh_first;
	262	}
	263	}
	264	printf("\n");
	265	/*
	266	* Forcibly free resources of what's left.
	267	*/
	268	p = allproc.lh_first;
	269	while (p) {
	270	/*
	271	* Close open files and release open-file table.
	272	* This may block!
	273	*/
	274	#ifdef notyet
	275	/* panics on reboot due to "zfree: non-allocated memory in collectable zone" message */
	276	fdfree(p);
	277	#endif /* notyet */
	278	p = p->p_list.le_next;
	279	}
	280	/* Wait for the reaper thread to run, and clean up what we have done
	281	* before we proceed with the hardcore shutdown. This reduces the race
	282	* between kill_tasks and the reaper thread.
	283	*/
	284	/* thread_wakeup(&reaper_queue); */
	285	/* IOSleep( 1 * 1000); */
	286	printf("continuing\n");
	287	}
	288