static void
proc_shutdown(void)
{
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();
/*
* Signal the init with SIGTERM so that he does not launch
* new processes
*/
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
*/
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;
}
}
}
proc_list_unlock();
}
if (error == ETIMEDOUT) {
/*
* log the names of the unresponsive tasks
*/
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);
}
}
proc_list_unlock();
delay_for_interval(1000 * 5, 1000 * 1000);
}
/*
* send a SIGKILL to all the procs still hanging around
*/
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;
}
}
}
proc_list_unlock();
}
/*
* if we still have procs that haven't exited, then brute force 'em
*/
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");
/* Now start the termination of processes that are marked for delayed termn */
if (delayterm == 0) {
delayterm = 1;
goto sigterm_loop;
}
sd_closelog(ctx);
/* drop the ref on initproc */
proc_rele(initproc);
printf("continuing\n");
}
int
reboot_kernel(int howto, char *message)
{
int hostboot_option=0;
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();
if ((howto&RB_QUICK)==RB_QUICK) {
printf("Quick reboot...\n");
if ((howto&RB_NOSYNC)==0) {
sync((proc_t)NULL, (void *)NULL, (int *)NULL);
}
}
else if ((howto&RB_NOSYNC)==0) {
int iter, nbusy;
printf("syncing disks... ");
/*
* Release vnodes held by texts before sync.
*/
/* handle live procs (deallocate their root and current directories), suspend initproc */
proc_shutdown();
#if CONFIG_AUDIT
audit_shutdown();
#endif
if (unmountroot_pre_hook != NULL)
unmountroot_pre_hook();
sync((proc_t)NULL, (void *)NULL, (int *)NULL);
if (kdebug_enable)
kdbg_dump_trace_to_file("/var/log/shutdown/shutdown.trace");
/*
* Unmount filesystems
*/
#if DEVELOPMENT || DEBUG
if (!(howto & RB_PANIC) || !kdp_has_polled_corefile())
#endif /* DEVELOPMENT || DEBUG */
{
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);
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_PANIC) {
if (strncmp(message, "Kernel memory has exceeded limits", 33) == 0) {
kernel_hwm_panic_info();
}
panic ("userspace panic: %s", message);
}
if (howto & RB_POWERDOWN)
hostboot_option = HOST_REBOOT_HALT;
if (howto & RB_HALT)
hostboot_option = HOST_REBOOT_HALT;
if (howto & RB_UPSDELAY) {
hostboot_option = HOST_REBOOT_UPSDELAY;
}
host_reboot(host_priv_self(), hostboot_option);
/*
* should not be reached
*/
return (0);
}
int
boot(int paniced, int howto, char *command)
{
struct proc *p = current_proc(); /* XXX */
int hostboot_option=0;
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_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;
printf("syncing disks... ");
/*
* Release vnodes held by texts before sync.
*/
/* 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);
/*
* Now that all processes have been terminated and system is
* sync'ed up, suspend init
*/
if (initproc && p != initproc)
task_suspend(initproc->task);
if (kdebug_enable)
kdbg_dump_trace_to_file("/var/log/shutdown/shutdown.trace");
/*
* 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);
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)
hostboot_option = HOST_REBOOT_HALT;
if (paniced == RB_PANIC)
hostboot_option = HOST_REBOOT_HALT;
if (howto & RB_UPSDELAY) {
hostboot_option = HOST_REBOOT_UPSDELAY;
}
host_reboot(host_priv_self(), hostboot_option);
/*
* should not be reached
*/
return (0);
}
void
delay(
int usec)
{
delay_for_interval((usec < 0)? -usec: usec, NSEC_PER_USEC);
}
