bool unregister_watchdog(watchdog_t *wd)
{
watchdog_t *p;
bool ok = false;
if (!wd_is_init) {
Jmsg0(NULL, M_ABORT, 0, _("BUG! unregister_watchdog_unlocked called before start_watchdog\n"));
}
wd_lock();
foreach_dlist(p, wd_queue) {
if (wd == p) {
wd_queue->remove(wd);
Dmsg1(800, "Unregistered watchdog %p\n", wd);
ok = true;
goto get_out;
}
}
foreach_dlist(p, wd_inactive) {
if (wd == p) {
wd_inactive->remove(wd);
Dmsg1(800, "Unregistered inactive watchdog %p\n", wd);
ok = true;
goto get_out;
}
}
Dmsg1(800, "Failed to unregister watchdog %p\n", wd);
get_out:
wd_unlock();
ping_watchdog();
return ok;
}
static ssize_t harddog_write(struct file *file, const char __user *data, size_t len,
loff_t *ppos)
{
if(len)
return ping_watchdog(harddog_out_fd);
return 0;
}
static ssize_t harddog_write(struct file *file, const char __user *data, size_t len,
loff_t *ppos)
{
/*
* Refresh the timer.
*/
if(len)
return(ping_watchdog(harddog_out_fd));
return 0;
}
/*
* Terminate the watchdog thread
*
* Returns: 0 on success
* errno on failure
*/
int stop_watchdog(void)
{
int stat;
watchdog_t *p;
if (!wd_is_init) {
return 0;
}
quit = true; /* notify watchdog thread to stop */
ping_watchdog();
stat = pthread_join(wd_tid, NULL);
while (!wd_queue->empty()) {
void *item = wd_queue->first();
wd_queue->remove(item);
p = (watchdog_t *)item;
if (p->destructor != NULL) {
p->destructor(p);
}
free(p);
}
delete wd_queue;
wd_queue = NULL;
while (!wd_inactive->empty()) {
void *item = wd_inactive->first();
wd_inactive->remove(item);
p = (watchdog_t *)item;
if (p->destructor != NULL) {
p->destructor(p);
}
free(p);
}
delete wd_inactive;
wd_inactive = NULL;
rwl_destroy(&lock);
wd_is_init = false;
return stat;
}
bool register_watchdog(watchdog_t *wd)
{
if (!wd_is_init) {
Jmsg0(NULL, M_ABORT, 0, _("BUG! register_watchdog called before start_watchdog\n"));
}
if (wd->callback == NULL) {
Jmsg1(NULL, M_ABORT, 0, _("BUG! Watchdog %p has NULL callback\n"), wd);
}
if (wd->interval == 0) {
Jmsg1(NULL, M_ABORT, 0, _("BUG! Watchdog %p has zero interval\n"), wd);
}
wd_lock();
wd->next_fire = watchdog_time + wd->interval;
wd_queue->append(wd);
Dmsg3(800, "Registered watchdog %p, interval %d%s\n",
wd, wd->interval, wd->one_shot ? " one shot" : "");
wd_unlock();
ping_watchdog();
return false;
}
static int harddog_ioctl_unlocked(struct file *file,
unsigned int cmd, unsigned long arg)
{
void __user *argp= (void __user *)arg;
static struct watchdog_info ident = {
WDIOC_SETTIMEOUT,
0,
"UML Hardware Watchdog"
};
switch (cmd) {
default:
return -ENOTTY;
case WDIOC_GETSUPPORT:
if(copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
return 0;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
return put_user(0,(int __user *)argp);
case WDIOC_KEEPALIVE:
return ping_watchdog(harddog_out_fd);
}
}