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Add a new sysctl node kern.shutdown, off which shutdown-related things

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can be hung.

Add a tunable delay at the beginning of the SHUTDOWN_FINAL at_shutdown
queue, allowing time to settle before we launch into the list of things
that are expected to turn the system off.

Fix a bug in at_shutdown_pri() where the second insertion always put
the item in second position in the queue.

Reviewed by:	"D. Rock" <rock@cs.uni-sb.de>
This commit is contained in:
Mike Smith 1999-01-30 19:28:30 +00:00
parent d062c93a3b
commit db82a982a7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=43436
1 changed files with 30 additions and 4 deletions
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34
sys/kern/kern_shutdown.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)kern_shutdown.c 8.3 (Berkeley) 1/21/94
* $Id: kern_shutdown.c,v 1.43 1998/12/04 22:54:51 archie Exp $
* $Id: kern_shutdown.c,v 1.44 1998/12/28 23:03:00 msmith Exp $
*/
#include "opt_ddb.h"
@ -88,6 +88,8 @@ SYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW,
&debugger_on_panic, 0, "");
#endif
SYSCTL_NODE(_kern, OID_AUTO, shutdown, CTLFLAG_RW, 0, "Shutdown environment");
#ifdef HW_WDOG
/*
* If there is a hardware watchdog, point this at the function needed to
@ -470,7 +472,7 @@ at_shutdown(bootlist_fn function, void *arg, int queue)
int
at_shutdown_pri(bootlist_fn function, void *arg, int queue, int pri)
{
sle_p ep, ip;
sle_p op, ep, ip;
if (queue < SHUTDOWN_PRE_SYNC
|| queue > SHUTDOWN_FINAL) {
@ -492,7 +494,7 @@ at_shutdown_pri(bootlist_fn function, void *arg, int queue, int pri)
if (ip == NULL) {
LIST_INSERT_HEAD(&shutdown_lists[queue], ep, links);
} else {
for (; LIST_NEXT(ip, links) != NULL; ip = LIST_NEXT(ip, links)) {
for (; ip != NULL; op = ip, ip = LIST_NEXT(ip, links)) {
if (ep->priority < ip->priority) {
LIST_INSERT_BEFORE(ip, ep, links);
ep = NULL;
@ -500,7 +502,7 @@ at_shutdown_pri(bootlist_fn function, void *arg, int queue, int pri)
}
}
if (ep != NULL)
LIST_INSERT_AFTER(ip, ep, links);
LIST_INSERT_AFTER(op, ep, links);
}
return (0);
}
@ -528,3 +530,27 @@ rm_at_shutdown(bootlist_fn function, void *arg)
}
return (count);
}
/*
* Support for poweroff delay.
*/
static int poweroff_delay = 0;
SYSCTL_INT(_kern_shutdown, OID_AUTO, poweroff_delay, CTLFLAG_RW,
&poweroff_delay, 0, "");
static void poweroff_wait(int howto, void *unused)
{
if(!(howto & RB_POWEROFF) || poweroff_delay <= 0)
return;
DELAY(poweroff_delay * 1000);
}
/*
* XXX OK? This implies I know SHUTDOWN_PRI_LAST > SHUTDOWN_PRI_FIRST
*/
static void poweroff_conf(void *unused)
{
at_shutdown_pri(poweroff_wait, NULL, SHUTDOWN_FINAL, SHUTDOWN_PRI_FIRST);
}
SYSINIT(poweroff_conf, SI_SUB_INTRINSIC, SI_ORDER_ANY, poweroff_conf, NULL)