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

/*
 * Copyright (c) 2000-2004 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_internal.h>
#include <sys/user.h>
#include <sys/reboot.h>
#include <sys/conf.h>
#include <sys/vnode_internal.h>
#include <sys/file_internal.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 <sys/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_priv.h>
#include <mach/host_reboot.h>

#include <bsm/audit_kernel.h>

int	waittime = -1;
static void proc_shutdown();

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;
	struct proc  *launchd_proc;

    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();

		audit_shutdown();

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

		/*
		 * Now that all processes have been  termianted and system is sync'ed up, 
		 * suspend launchd
		 */

		launchd_proc = pfind(1);
		if (launchd_proc && p != launchd_proc) {
			task_suspend(launchd_proc->task);
		}

		/*
		 * Unmount filesystems
		 */
		vfs_unmountall();

		/* Wait for the buffer cache to clean remaining dirty buffers */
		for (iter = 0; iter < 100; iter++) {
			nbusy = count_busy_buffers();
			if (nbusy == 0)
				break;
			printf("%d ", nbusy);
			IOSleep( 1 * 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 we're going to power down due to a halt,
	 * give the disks a chance to finish getting
	 * the track cache flushed to the media... 
	 * unfortunately, some of our earlier drives
	 * don't properly hold off on returning 
	 * from the track flush command (issued by
	 * the unmounts) until it's actully fully
	 * committed.
	 */
	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;
	int delayterm = 0;

	/*
	 *	Kill as many procs as we can.  (Except ourself...)
	 */
	self = (struct proc *)current_proc();
	
	/*
	 * Signal the init with SIGTERM so that he does not launch
	 * new processes 
	 */
	p = pfind(1);
	if (p && p != self) {
		psignal(p, SIGTERM);
	}

	printf("Killing all processes ");

	/*
	 * send SIGTERM to those procs interested in catching one
	 */
sigterm_loop:
	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) && (p->p_stat != SZOMB) && (p->p_shutdownstate == 0)) {

			if ((delayterm == 0) && ((p->p_lflag& P_LDELAYTERM) == P_LDELAYTERM)) {
				continue;
			}
		        if (p->p_sigcatch & sigmask(SIGTERM)) {
					p->p_shutdownstate = 1;
					if (proc_refinternal(p, 1) == p) {
			        	psignal(p, SIGTERM);
						proc_dropinternal(p, 1);
					}
				goto sigterm_loop;
		}
	}
	}
	/*
	 * 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_shutdownstate == 1) {
				TERM_catch++;
			}
		}
		if (TERM_catch == 0)
		        break;
	}
	if (TERM_catch) {
		/*
		 * log the names of the unresponsive tasks
		 */

	        for (p = allproc.lh_first; p; p = p->p_list.le_next) {
			if (p->p_shutdownstate == 1) {
				  printf("%s[%d]: didn't act on SIGTERM\n", p->p_comm, p->p_pid);
			}
		}
		IOSleep(1000 * 5);
	}

	/*
	 * send a SIGKILL to all the procs still hanging around
	 */
sigkill_loop:
	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) && (p->p_stat != SZOMB) && (p->p_shutdownstate != 2)) {

			if ((delayterm == 0) && ((p->p_lflag& P_LDELAYTERM) == P_LDELAYTERM)) {
				continue;
			}
			if (proc_refinternal(p, 1) == p) {
				psignal(p, SIGKILL);
				proc_dropinternal(p, 1);
			}
			p->p_shutdownstate = 2;
			goto sigkill_loop;
		}
	}
	/*
	 * 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_shutdownstate == 2)
			        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_shutdownstate == 3) || (p->p_flag&P_SYSTEM) || (!delayterm && ((p->p_lflag& P_LDELAYTERM))) 
				|| (p->p_pptr->p_pid == 0) || (p == self)) {
		        p = p->p_list.le_next;
		}
		else {
			p->p_shutdownstate = 3;
		        /*
			 * 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 */
				/* give him a chance */
				thread_block(THREAD_CONTINUE_NULL);
			} else {
				p->exit_thread = current_thread();
				printf(".");
				if (proc_refinternal(p, 1) == p) {
					exit1(p, 1, (int *)NULL);
					proc_dropinternal(p, 1);
				}
			}
			p = allproc.lh_first;
		}
	}
	printf("\n");


	/* Now start the termination of processes that are marked for delayed termn */
	if (delayterm == 0) {
		delayterm = 1;
		goto  sigterm_loop;
	}
	printf("continuing\n");
}
Commit	Line	Data
1c79356b	1	/*
91447636	2	* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
37839358 A	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.
1c79356b	11	*
37839358 A	12	* This Original Code and all software distributed under the License are
37839358 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
37839358 A	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.
1c79356b A	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>
91447636	33	#include <sys/proc_internal.h>
1c79356b	34	#include <sys/user.h>
1c79356b A	35	#include <sys/reboot.h>
1c79356b A	36	#include <sys/conf.h>
91447636 A	37	#include <sys/vnode_internal.h>
91447636 A	38	#include <sys/file_internal.h>
1c79356b A	39	#include <sys/clist.h>
	40	#include <sys/callout.h>
	41	#include <sys/mbuf.h>
	42	#include <sys/msgbuf.h>
	43	#include <sys/ioctl.h>
	44	#include <sys/signal.h>
	45	#include <sys/tty.h>
	46	#include <kern/task.h>
9bccf70c	47	#include <sys/quota.h>
1c79356b A	48	#include <ufs/ufs/inode.h>
	49	#if NCPUS > 1
	50	#include <kern/processor.h>
	51	#include <kern/thread.h>
	52	#include <sys/lock.h>
	53	#endif /* NCPUS > 1 */
	54	#include <vm/vm_kern.h>
	55	#include <mach/vm_param.h>
	56	#include <sys/filedesc.h>
91447636	57	#include <mach/host_priv.h>
1c79356b	58	#include <mach/host_reboot.h>
91447636	59
e5568f75	60	#include <bsm/audit_kernel.h>
1c79356b A	61
1c79356b A	62	int waittime = -1;
ff6e181a	63	static void proc_shutdown();
1c79356b A	64
	65	void
	66	boot(paniced, howto, command)
	67	int paniced, howto;
	68	char *command;
	69	{
	70	register int i;
	71	int s;
	72	struct proc p = current_proc(); / XXX */
	73	int hostboot_option=0;
	74	int funnel_state;
91447636	75	struct proc *launchd_proc;
1c79356b	76
0b4e3aa0	77	extern void md_prepare_for_shutdown(int paniced, int howto, char * command);
1c79356b A	78
	79	funnel_state = thread_funnel_set(kernel_flock, TRUE);
	80
0b4e3aa0	81	md_prepare_for_shutdown(paniced, howto, command);
1c79356b A	82
	83	if ((howto&RB_NOSYNC)==0 && waittime < 0) {
	84	int iter, nbusy;
	85
	86	waittime = 0;
	87
	88	printf("syncing disks... ");
	89
	90	/*
	91	* Release vnodes held by texts before sync.
	92	*/
	93
	94	/* handle live procs (deallocate their root and current directories). */
	95	proc_shutdown();
	96
55e303ae A	97	audit_shutdown();
55e303ae A	98
1c79356b A	99	sync(p, (void )NULL, (int )NULL);
1c79356b A	100
91447636 A	101	/*
	102	* Now that all processes have been termianted and system is sync'ed up,
	103	* suspend launchd
	104	*/
1c79356b	105
91447636 A	106	launchd_proc = pfind(1);
	107	if (launchd_proc && p != launchd_proc) {
	108	task_suspend(launchd_proc->task);
	109	}
1c79356b A	110
	111	/*
	112	* Unmount filesystems
	113	*/
91447636	114	vfs_unmountall();
1c79356b A	115
1c79356b A	116	/* Wait for the buffer cache to clean remaining dirty buffers */
91447636	117	for (iter = 0; iter < 100; iter++) {
1c79356b A	118	nbusy = count_busy_buffers();
	119	if (nbusy == 0)
	120	break;
	121	printf("%d ", nbusy);
91447636	122	IOSleep( 1 * nbusy );
1c79356b A	123	}
	124	if (nbusy)
	125	printf("giving up\n");
	126	else
	127	printf("done\n");
	128	}
	129
	130	/*
	131	* Can't just use an splnet() here to disable the network
	132	* because that will lock out softints which the disk
	133	* drivers depend on to finish DMAs.
	134	*/
	135	if_down_all();
	136
	137	if (howto & RB_POWERDOWN)
	138	hostboot_option = HOST_REBOOT_HALT;
	139	if (howto & RB_HALT)
	140	hostboot_option = HOST_REBOOT_HALT;
	141	if (paniced == RB_PANIC)
	142	hostboot_option = HOST_REBOOT_HALT;
	143
91447636 A	144	/*
	145	* if we're going to power down due to a halt,
	146	* give the disks a chance to finish getting
	147	* the track cache flushed to the media...
	148	* unfortunately, some of our earlier drives
	149	* don't properly hold off on returning
	150	* from the track flush command (issued by
	151	* the unmounts) until it's actully fully
	152	* committed.
	153	*/
1c79356b A	154	if (hostboot_option == HOST_REBOOT_HALT)
	155	IOSleep( 1 * 1000 );
	156
	157	host_reboot(host_priv_self(), hostboot_option);
	158
	159	thread_funnel_set(kernel_flock, FALSE);
	160	}
	161
	162	/*
	163	* proc_shutdown()
	164	*
	165	* Shutdown down proc system (release references to current and root
	166	* dirs for each process).
	167	*
	168	* POSIX modifications:
	169	*
	170	* For POSIX fcntl() file locking call vno_lockrelease() on
	171	* the file to release all of its record locks, if any.
	172	*/
	173
	174	static void
	175	proc_shutdown()
	176	{
	177	struct proc p, self;
	178	struct vnode cdirp, rdirp, *vp;
	179	int restart, i, TERM_catch;
91447636	180	int delayterm = 0;
1c79356b A	181
	182	/*
	183	* Kill as many procs as we can. (Except ourself...)
	184	*/
0b4e3aa0	185	self = (struct proc *)current_proc();
1c79356b A	186
1c79356b A	187	/*
91447636 A	188	* Signal the init with SIGTERM so that he does not launch
91447636 A	189	* new processes
1c79356b A	190	*/
1c79356b A	191	p = pfind(1);
91447636 A	192	if (p && p != self) {
	193	psignal(p, SIGTERM);
	194	}
1c79356b	195
1c79356b A	196	printf("Killing all processes ");
	197
	198	/*
	199	* send SIGTERM to those procs interested in catching one
	200	*/
4a249263	201	sigterm_loop:
1c79356b	202	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
91447636 A	203	if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self) && (p->p_stat != SZOMB) && (p->p_shutdownstate == 0)) {
	204
	205	if ((delayterm == 0) && ((p->p_lflag& P_LDELAYTERM) == P_LDELAYTERM)) {
	206	continue;
	207	}
4a249263	208	if (p->p_sigcatch & sigmask(SIGTERM)) {
91447636	209	p->p_shutdownstate = 1;
ff6e181a A	210	if (proc_refinternal(p, 1) == p) {
	211	psignal(p, SIGTERM);
	212	proc_dropinternal(p, 1);
	213	}
4a249263	214	goto sigterm_loop;
1c79356b A	215	}
1c79356b A	216	}
91447636	217	}
1c79356b A	218	/*
	219	* now wait for up to 30 seconds to allow those procs catching SIGTERM
	220	* to digest it
	221	* as soon as these procs have exited, we'll continue on to the next step
	222	*/
	223	for (i = 0; i < 300; i++) {
	224	/*
	225	* sleep for a tenth of a second
	226	* and then check to see if the tasks that were sent a
	227	* SIGTERM have exited
	228	*/
91447636	229	IOSleep(100);
1c79356b A	230	TERM_catch = 0;
1c79356b A	231
91447636 A	232	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
	233	if (p->p_shutdownstate == 1) {
	234	TERM_catch++;
	235	}
1c79356b A	236	}
	237	if (TERM_catch == 0)
	238	break;
	239	}
55e303ae	240	if (TERM_catch) {
91447636	241	/*
55e303ae A	242	* log the names of the unresponsive tasks
55e303ae A	243	*/
91447636	244
55e303ae	245	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
91447636	246	if (p->p_shutdownstate == 1) {
55e303ae	247	printf("%s[%d]: didn't act on SIGTERM\n", p->p_comm, p->p_pid);
91447636	248	}
55e303ae A	249	}
	250	IOSleep(1000 * 5);
	251	}
1c79356b A	252
	253	/*
	254	* send a SIGKILL to all the procs still hanging around
	255	*/
4a249263	256	sigkill_loop:
1c79356b	257	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
91447636 A	258	if (((p->p_flag&P_SYSTEM) == 0) && (p->p_pptr->p_pid != 0) && (p != self) && (p->p_stat != SZOMB) && (p->p_shutdownstate != 2)) {
	259
	260	if ((delayterm == 0) && ((p->p_lflag& P_LDELAYTERM) == P_LDELAYTERM)) {
	261	continue;
	262	}
ff6e181a A	263	if (proc_refinternal(p, 1) == p) {
	264	psignal(p, SIGKILL);
	265	proc_dropinternal(p, 1);
	266	}
4a249263	267	p->p_shutdownstate = 2;
4a249263 A	268	goto sigkill_loop;
4a249263 A	269	}
1c79356b A	270	}
	271	/*
	272	* wait for up to 60 seconds to allow these procs to exit normally
	273	*/
	274	for (i = 0; i < 300; i++) {
	275	IOSleep(200); /* double the time from 100 to 200 for NFS requests in particular */
	276
	277	for (p = allproc.lh_first; p; p = p->p_list.le_next) {
91447636	278	if (p->p_shutdownstate == 2)
1c79356b A	279	break;
	280	}
	281	if (!p)
	282	break;
	283	}
	284
	285	/*
	286	* if we still have procs that haven't exited, then brute force 'em
	287	*/
	288	p = allproc.lh_first;
	289	while (p) {
ff6e181a	290	if ((p->p_shutdownstate == 3) \|\| (p->p_flag&P_SYSTEM) \|\| (!delayterm && ((p->p_lflag& P_LDELAYTERM)))
91447636	291	\|\| (p->p_pptr->p_pid == 0) \|\| (p == self)) {
1c79356b A	292	p = p->p_list.le_next;
	293	}
	294	else {
ff6e181a	295	p->p_shutdownstate = 3;
1c79356b A	296	/*
	297	* NOTE: following code ignores sig_lock and plays
	298	* with exit_thread correctly. This is OK unless we
	299	* are a multiprocessor, in which case I do not
	300	* understand the sig_lock. This needs to be fixed.
	301	* XXX
	302	*/
91447636 A	303	if (p->exit_thread) { /* someone already doing it */
	304	/* give him a chance */
	305	thread_block(THREAD_CONTINUE_NULL);
	306	} else {
	307	p->exit_thread = current_thread();
1c79356b	308	printf(".");
ff6e181a A	309	if (proc_refinternal(p, 1) == p) {
	310	exit1(p, 1, (int *)NULL);
	311	proc_dropinternal(p, 1);
	312	}
1c79356b A	313	}
	314	p = allproc.lh_first;
	315	}
	316	}
	317	printf("\n");
4a249263	318
91447636 A	319
	320	/* Now start the termination of processes that are marked for delayed termn */
	321	if (delayterm == 0) {
	322	delayterm = 1;
	323	goto sigterm_loop;
1c79356b	324	}
1c79356b A	325	printf("continuing\n");
	326	}
	327