/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* File: bsd/kern/kern_shutdown.c
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/vm.h>
-#include <sys/proc.h>
+#include <sys/proc_internal.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/vnode_internal.h>
+#include <sys/file_internal.h>
#include <sys/clist.h>
#include <sys/callout.h>
#include <sys/mbuf.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 <sys/kern_audit.h>
-int waittime = -1;
+#include <security/audit/audit.h>
+
+#include <kern/sched_prim.h> /* for thread_block() */
+#include <kern/host.h> /* for host_priv_self() */
+#include <net/if_var.h> /* for if_down_all() */
+#include <sys/buf_internal.h> /* for count_busy_buffers() */
+#include <sys/mount_internal.h> /* for vfs_unmountall() */
+#include <mach/task.h> /* for task_suspend() */
+#include <sys/sysproto.h> /* abused for sync() */
+#include <kern/clock.h> /* for delay_for_interval() */
+#include <libkern/OSAtomic.h>
+
+#include <sys/kdebug.h>
+
+uint32_t system_inshutdown = 0;
+
+/* XXX should be in a header file somewhere, but isn't */
+extern void md_prepare_for_shutdown(int, int, char *);
+extern void (*unmountroot_pre_hook)(void);
+
+unsigned int proc_shutdown_exitcount = 0;
+
+static int sd_openlog(vfs_context_t);
+static int sd_closelog(vfs_context_t);
+static void sd_log(vfs_context_t, const char *, ...);
+static void proc_shutdown(void);
+
+extern void IOSystemShutdownNotification(void);
+
+struct sd_filterargs{
+ int delayterm;
+ int shutdownstate;
+};
+
+
+struct sd_iterargs {
+ int signo; /* the signal to be posted */
+ int setsdstate; /* shutdown state to be set */
+ int countproc; /* count processes on action */
+ int activecount; /* number of processes on which action was done */
+};
+
+static vnode_t sd_logvp = NULLVP;
+static off_t sd_log_offset = 0;
+
-void
-boot(paniced, howto, command)
- int paniced, howto;
- char *command;
+static int sd_filt1(proc_t, void *);
+static int sd_filt2(proc_t, void *);
+static int sd_callback1(proc_t p, void * arg);
+static int sd_callback2(proc_t p, void * arg);
+static int sd_callback3(proc_t p, void * arg);
+
+int
+boot(int paniced, int 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);
+ if (!OSCompareAndSwap(0, 1, &system_inshutdown)) {
+ if ( (howto&RB_QUICK) == RB_QUICK)
+ goto force_reboot;
+ return (EBUSY);
+ }
+ /*
+ * Temporary hack to notify the power management root domain
+ * that the system will shut down.
+ */
+ IOSystemShutdownNotification();
md_prepare_for_shutdown(paniced, howto, command);
- if ((howto&RB_NOSYNC)==0 && waittime < 0) {
+ if ((howto&RB_QUICK)==RB_QUICK) {
+ printf("Quick reboot...\n");
+ if ((howto&RB_NOSYNC)==0) {
+ sync(p, (void *)NULL, (int *)NULL);
+ }
+ }
+ else if ((howto&RB_NOSYNC)==0) {
int iter, nbusy;
- waittime = 0;
-
printf("syncing disks... ");
/*
/* handle live procs (deallocate their root and current directories). */
proc_shutdown();
+#if CONFIG_AUDIT
audit_shutdown();
+#endif
+
+ if (unmountroot_pre_hook != NULL)
+ unmountroot_pre_hook();
sync(p, (void *)NULL, (int *)NULL);
- /* Release vnodes from the VM object cache */
- ubc_unmountall();
+ /*
+ * Now that all processes have been terminated and system is
+ * sync'ed up, suspend init
+ */
+
+ if (initproc && p != initproc)
+ task_suspend(initproc->task);
- IOSleep( 1 * 1000 );
+ if (kdebug_enable)
+ kdbg_dump_trace_to_file("/var/log/shutdown/shutdown.trace");
/*
* Unmount filesystems
*/
- if (panicstr == 0)
- vfs_unmountall();
+ vfs_unmountall();
/* Wait for the buffer cache to clean remaining dirty buffers */
- for (iter = 0; iter < 20; iter++) {
+ for (iter = 0; iter < 100; iter++) {
nbusy = count_busy_buffers();
if (nbusy == 0)
break;
printf("%d ", nbusy);
- IOSleep( 4 * nbusy );
+ delay_for_interval( 1 * nbusy, 1000 * 1000);
}
if (nbusy)
printf("giving up\n");
else
printf("done\n");
}
-
+#if NETWORKING
/*
* 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();
+#endif /* NETWORKING */
+force_reboot:
if (howto & RB_POWERDOWN)
hostboot_option = HOST_REBOOT_HALT;
if (howto & RB_HALT)
if (paniced == RB_PANIC)
hostboot_option = HOST_REBOOT_HALT;
- if (hostboot_option == HOST_REBOOT_HALT)
- IOSleep( 1 * 1000 );
+ if (howto & RB_UPSDELAY) {
+ hostboot_option = HOST_REBOOT_UPSDELAY;
+ }
host_reboot(host_priv_self(), hostboot_option);
+ /*
+ * should not be reached
+ */
+ return (0);
+}
+
+static int
+sd_openlog(vfs_context_t ctx)
+{
+ int error = 0;
+ struct timeval tv;
+
+ /* Open shutdown log */
+ if ((error = vnode_open(PROC_SHUTDOWN_LOG, (O_CREAT | FWRITE | O_NOFOLLOW), 0644, 0, &sd_logvp, ctx))) {
+ printf("Failed to open %s: error %d\n", PROC_SHUTDOWN_LOG, error);
+ sd_logvp = NULLVP;
+ return error;
+ }
+
+ vnode_setsize(sd_logvp, (off_t)0, 0, ctx);
+
+ /* Write a little header */
+ microtime(&tv);
+ sd_log(ctx, "Process shutdown log. Current time is %lu (in seconds).\n\n", tv.tv_sec);
+
+ return 0;
+}
+
+static int
+sd_closelog(vfs_context_t ctx)
+{
+ int error = 0;
+ if (sd_logvp != NULLVP) {
+ VNOP_FSYNC(sd_logvp, MNT_WAIT, ctx);
+ error = vnode_close(sd_logvp, FWRITE, ctx);
+ }
+
+ return error;
+}
+
+static void
+sd_log(vfs_context_t ctx, const char *fmt, ...)
+{
+ int resid, log_error, len;
+ char logbuf[100];
+ va_list arglist;
+
+ /* If the log isn't open yet, open it */
+ if (sd_logvp == NULLVP) {
+ if (sd_openlog(ctx) != 0) {
+ /* Couldn't open, we fail out */
+ return;
+ }
+ }
+
+ va_start(arglist, fmt);
+ len = vsnprintf(logbuf, sizeof(logbuf), fmt, arglist);
+ log_error = vn_rdwr(UIO_WRITE, sd_logvp, (caddr_t)logbuf, len, sd_log_offset,
+ UIO_SYSSPACE, IO_UNIT | IO_NOAUTH, vfs_context_ucred(ctx), &resid, vfs_context_proc(ctx));
+ if (log_error == EIO || log_error == 0) {
+ sd_log_offset += (len - resid);
+ }
+
+ va_end(arglist);
+
+}
+
+static int
+sd_filt1(proc_t p, void * args)
+{
+ proc_t self = current_proc();
+ struct sd_filterargs * sf = (struct sd_filterargs *)args;
+ int delayterm = sf-> delayterm;
+ int shutdownstate = sf->shutdownstate;
+
+ if (((p->p_flag&P_SYSTEM) != 0) || (p->p_ppid == 0)
+ ||(p == self) || (p->p_stat == SZOMB)
+ || (p->p_shutdownstate != shutdownstate)
+ ||((delayterm == 0) && ((p->p_lflag& P_LDELAYTERM) == P_LDELAYTERM))
+ || ((p->p_sigcatch & sigmask(SIGTERM))== 0)) {
+ return(0);
+ }
+ else
+ return(1);
+}
+
+
+static int
+sd_callback1(proc_t p, void * args)
+{
+ struct sd_iterargs * sd = (struct sd_iterargs *)args;
+ int signo = sd->signo;
+ int setsdstate = sd->setsdstate;
+ int countproc = sd->countproc;
+
+ proc_lock(p);
+ p->p_shutdownstate = setsdstate;
+ if (p->p_stat != SZOMB) {
+ proc_unlock(p);
+ if (countproc != 0) {
+ proc_list_lock();
+ p->p_listflag |= P_LIST_EXITCOUNT;
+ proc_shutdown_exitcount++;
+ proc_list_unlock();
+ }
- thread_funnel_set(kernel_flock, FALSE);
+ psignal(p, signo);
+ if (countproc != 0)
+ sd->activecount++;
+ } else
+ proc_unlock(p);
+ return(PROC_RETURNED);
}
+static int
+sd_filt2(proc_t p, void * args)
+{
+ proc_t self = current_proc();
+ struct sd_filterargs * sf = (struct sd_filterargs *)args;
+ int delayterm = sf-> delayterm;
+ int shutdownstate = sf->shutdownstate;
+
+ if (((p->p_flag&P_SYSTEM) != 0) || (p->p_ppid == 0)
+ ||(p == self) || (p->p_stat == SZOMB)
+ || (p->p_shutdownstate == shutdownstate)
+ ||((delayterm == 0) && ((p->p_lflag& P_LDELAYTERM) == P_LDELAYTERM))) {
+ return(0);
+ }
+ else
+ return(1);
+}
+
+static int
+sd_callback2(proc_t p, void * args)
+{
+ struct sd_iterargs * sd = (struct sd_iterargs *)args;
+ int signo = sd->signo;
+ int setsdstate = sd->setsdstate;
+ int countproc = sd->countproc;
+
+ proc_lock(p);
+ p->p_shutdownstate = setsdstate;
+ if (p->p_stat != SZOMB) {
+ proc_unlock(p);
+ if (countproc != 0) {
+ proc_list_lock();
+ p->p_listflag |= P_LIST_EXITCOUNT;
+ proc_shutdown_exitcount++;
+ proc_list_unlock();
+ }
+ psignal(p, signo);
+ if (countproc != 0)
+ sd->activecount++;
+ } else
+ proc_unlock(p);
+
+ return(PROC_RETURNED);
+
+}
+
+static int
+sd_callback3(proc_t p, void * args)
+{
+ struct sd_iterargs * sd = (struct sd_iterargs *)args;
+ vfs_context_t ctx = vfs_context_current();
+
+ int setsdstate = sd->setsdstate;
+
+ proc_lock(p);
+ p->p_shutdownstate = setsdstate;
+ if (p->p_stat != SZOMB) {
+ /*
+ * 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 */
+ proc_unlock(p);
+ /* give him a chance */
+ thread_block(THREAD_CONTINUE_NULL);
+ } else {
+ p->exit_thread = current_thread();
+ printf(".");
+
+ sd_log(ctx, "%s[%d] had to be forced closed with exit1().\n", p->p_comm, p->p_pid);
+
+ proc_unlock(p);
+ KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_PROC, BSD_PROC_FRCEXIT) | DBG_FUNC_NONE,
+ p->p_pid, 0, 1, 0, 0);
+ sd->activecount++;
+ exit1(p, 1, (int *)NULL);
+ }
+ } else
+ proc_unlock(p);
+
+ return(PROC_RETURNED);
+}
+
+
/*
* proc_shutdown()
*
*/
static void
-proc_shutdown()
+proc_shutdown(void)
{
- struct proc *p, *self;
- struct vnode **cdirp, **rdirp, *vp;
- int restart, i, TERM_catch;
+ vfs_context_t ctx = vfs_context_current();
+ struct proc *p, *self;
+ int delayterm = 0;
+ struct sd_filterargs sfargs;
+ struct sd_iterargs sdargs;
+ int error = 0;
+ struct timespec ts;
/*
* Kill as many procs as we can. (Except ourself...)
self = (struct proc *)current_proc();
/*
- * Suspend /etc/init
+ * Signal the init with SIGTERM so that he does not launch
+ * new processes
*/
- p = pfind(1);
- if (p && p != self)
- task_suspend(p->task); /* stop init */
+ p = proc_find(1);
+ if (p && p != self) {
+ psignal(p, SIGTERM);
+ }
+ proc_rele(p);
printf("Killing all processes ");
+sigterm_loop:
/*
* 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++;
+ sfargs.delayterm = delayterm;
+ sfargs.shutdownstate = 0;
+ sdargs.signo = SIGTERM;
+ sdargs.setsdstate = 1;
+ sdargs.countproc = 1;
+ sdargs.activecount = 0;
+
+ error = 0;
+ /* post a SIGTERM to all that catch SIGTERM and not marked for delay */
+ proc_rebootscan(sd_callback1, (void *)&sdargs, sd_filt1, (void *)&sfargs);
+
+ if (sdargs.activecount != 0 && proc_shutdown_exitcount!= 0) {
+ proc_list_lock();
+ if (proc_shutdown_exitcount != 0) {
+ /*
+ * 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
+ */
+ ts.tv_sec = 30;
+ ts.tv_nsec = 0;
+ error = msleep(&proc_shutdown_exitcount, proc_list_mlock, PWAIT, "shutdownwait", &ts);
+ if (error != 0) {
+ for (p = allproc.lh_first; p; p = p->p_list.le_next) {
+ if ((p->p_listflag & P_LIST_EXITCOUNT) == P_LIST_EXITCOUNT)
+ p->p_listflag &= ~P_LIST_EXITCOUNT;
+ }
+ for (p = zombproc.lh_first; p; p = p->p_list.le_next) {
+ if ((p->p_listflag & P_LIST_EXITCOUNT) == P_LIST_EXITCOUNT)
+ p->p_listflag &= ~P_LIST_EXITCOUNT;
+ }
}
+
}
- if (TERM_catch == 0)
- break;
+ proc_list_unlock();
}
- if (TERM_catch) {
- /*
+ if (error == ETIMEDOUT) {
+ /*
* log the names of the unresponsive tasks
*/
- 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))
- printf("%s[%d]: didn't act on SIGTERM\n", p->p_comm, p->p_pid);
+
+ proc_list_lock();
+
+ 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);
+ sd_log(ctx, "%s[%d]: didn't act on SIGTERM\n", p->p_comm, p->p_pid);
}
}
- IOSleep(1000 * 5);
+
+ proc_list_unlock();
+
+ delay_for_interval(1000 * 5, 1000 * 1000);
}
/*
* 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;
+ sfargs.delayterm = delayterm;
+ sfargs.shutdownstate = 2;
+ sdargs.signo = SIGKILL;
+ sdargs.setsdstate = 2;
+ sdargs.countproc = 1;
+ sdargs.activecount = 0;
+
+ /* post a SIGKILL to all that catch SIGTERM and not marked for delay */
+ proc_rebootscan(sd_callback2, (void *)&sdargs, sd_filt2, (void *)&sfargs);
+
+ if (sdargs.activecount != 0 && proc_shutdown_exitcount!= 0) {
+ proc_list_lock();
+ if (proc_shutdown_exitcount != 0) {
+ /*
+ * wait for up to 60 seconds to allow these procs to exit normally
+ *
+ * History: The delay interval was changed from 100 to 200
+ * for NFS requests in particular.
+ */
+ ts.tv_sec = 60;
+ ts.tv_nsec = 0;
+ error = msleep(&proc_shutdown_exitcount, proc_list_mlock, PWAIT, "shutdownwait", &ts);
+ if (error != 0) {
+ for (p = allproc.lh_first; p; p = p->p_list.le_next) {
+ if ((p->p_listflag & P_LIST_EXITCOUNT) == P_LIST_EXITCOUNT)
+ p->p_listflag &= ~P_LIST_EXITCOUNT;
+ }
+ for (p = zombproc.lh_first; p; p = p->p_list.le_next) {
+ if ((p->p_listflag & P_LIST_EXITCOUNT) == P_LIST_EXITCOUNT)
+ p->p_listflag &= ~P_LIST_EXITCOUNT;
+ }
+ }
}
- if (!p)
- break;
+ proc_list_unlock();
}
/*
* 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 */
- /* give him a chance */
- thread_block(THREAD_CONTINUE_NULL);
- }
- else {
- p->exit_thread = current_act();
- printf(".");
- exit1(p, 1, (int *)NULL);
- }
- p = allproc.lh_first;
- }
- }
+ sfargs.delayterm = delayterm;
+ sfargs.shutdownstate = 3;
+ sdargs.signo = 0;
+ sdargs.setsdstate = 3;
+ sdargs.countproc = 0;
+ sdargs.activecount = 0;
+
+ /* post a SIGTERM to all that catch SIGTERM and not marked for delay */
+ proc_rebootscan(sd_callback3, (void *)&sdargs, sd_filt2, (void *)&sfargs);
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;
+
+ /* Now start the termination of processes that are marked for delayed termn */
+ if (delayterm == 0) {
+ delayterm = 1;
+ goto sigterm_loop;
}
- /* 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); */
+
+ sd_closelog(ctx);
+
+ /* drop the ref on initproc */
+ proc_rele(initproc);
printf("continuing\n");
}
projects / apple / xnu.git / blobdiff