/*
* log_event_upcall - Perform the upcall to syseventd for event buffer delivery.
* Check for rebinding errors
* This buffer is reused to by the syseventd door_return
* to hold the result code
*/
static int
log_event_upcall(log_event_upcall_arg_t *arg)
{
int error;
size_t size;
sysevent_t *ev;
door_arg_t darg, save_arg;
int retry;
int neagain = 0;
int neintr = 0;
int nticks = LOG_EVENT_MIN_PAUSE;
/* Initialize door args */
ev = (sysevent_t *)&arg->buf;
size = sizeof (log_event_upcall_arg_t) + SE_PAYLOAD_SZ(ev);
darg.rbuf = (char *)arg;
darg.data_ptr = (char *)arg;
darg.rsize = size;
darg.data_size = size;
darg.desc_ptr = NULL;
darg.desc_num = 0;
if ((event_door == NULL) &&
((error = log_event_upcall_lookup()) != 0)) {
LOG_DEBUG((CE_CONT,
"log_event_upcall: event_door error (%d)\n", error));
return (error);
}
LOG_DEBUG1((CE_CONT, "log_event_upcall: 0x%llx\n",
(longlong_t)SE_SEQ((sysevent_t *)&arg->buf)));
save_arg = darg;
for (retry = 0; ; retry++) {
if ((error = door_ki_upcall_limited(event_door, &darg, NULL,
SIZE_MAX, 0)) == 0) {
break;
}
switch (error) {
case EINTR:
neintr++;
log_event_pause(2);
darg = save_arg;
break;
case EAGAIN:
/* cannot deliver upcall - process may be forking */
neagain++;
log_event_pause(nticks);
nticks <<= 1;
if (nticks > LOG_EVENT_MAX_PAUSE)
nticks = LOG_EVENT_MAX_PAUSE;
darg = save_arg;
break;
case EBADF:
LOG_DEBUG((CE_CONT, "log_event_upcall: rebinding\n"));
/* Server may have died. Try rebinding */
if ((error = log_event_upcall_lookup()) != 0) {
LOG_DEBUG((CE_CONT,
"log_event_upcall: lookup error %d\n",
error));
return (EBADF);
}
if (retry > 4) {
LOG_DEBUG((CE_CONT,
"log_event_upcall: ebadf\n"));
return (EBADF);
}
LOG_DEBUG((CE_CONT, "log_event_upcall: "
"retrying upcall after lookup\n"));
darg = save_arg;
break;
default:
cmn_err(CE_CONT,
"log_event_upcall: door_ki_upcall error %d\n",
error);
return (error);
}
}
if (neagain > 0 || neintr > 0) {
LOG_DEBUG((CE_CONT, "upcall: eagain=%d eintr=%d nticks=%d\n",
neagain, neintr, nticks));
}
LOG_DEBUG1((CE_CONT, "log_event_upcall:\n\t"
"error=%d rptr1=%p rptr2=%p dptr2=%p ret1=%x ret2=%x\n",
error, (void *)arg, (void *)darg.rbuf,
(void *)darg.data_ptr,
*((int *)(darg.rbuf)), *((int *)(darg.data_ptr))));
if (!error) {
/*
* upcall was successfully executed. Check return code.
*/
error = *((int *)(darg.rbuf));
}
return (error);
}
/*
* log_event_upcall - Perform the upcall to syseventd for event buffer delivery.
* Check for rebinding errors
* This buffer is reused to by the syseventd door_return
* to hold the result code
*/
static int
log_event_upcall(log_event_upcall_arg_t *arg)
{
int error;
size_t size;
sysevent_t *ev;
door_arg_t darg, save_arg;
int retry;
int neagain = 0;
int neintr = 0;
int nticks = LOG_EVENT_MIN_PAUSE;
/* Initialize door args */
ev = (sysevent_t *)&arg->buf;
size = sizeof (log_event_upcall_arg_t) + SE_PAYLOAD_SZ(ev);
darg.rbuf = (char *)arg;
darg.data_ptr = (char *)arg;
darg.rsize = size;
darg.data_size = size;
darg.desc_ptr = NULL;
darg.desc_num = 0;
LOG_DEBUG1((CE_CONT, "log_event_upcall: 0x%llx\n",
(longlong_t)SE_SEQ((sysevent_t *)&arg->buf)));
save_arg = darg;
for (retry = 0; ; retry++) {
mutex_enter(&event_door_mutex);
if (event_door == NULL) {
mutex_exit(&event_door_mutex);
return (EBADF);
}
if ((error = door_ki_upcall_limited(event_door, &darg, NULL,
SIZE_MAX, 0)) == 0) {
mutex_exit(&event_door_mutex);
break;
}
/*
* EBADF is handled outside the switch below because we need to
* hold event_door_mutex a bit longer
*/
if (error == EBADF) {
/* Server died */
door_ki_rele(event_door);
event_door = NULL;
mutex_exit(&event_door_mutex);
return (error);
}
mutex_exit(&event_door_mutex);
/*
* The EBADF case is already handled above with event_door_mutex
* held
*/
switch (error) {
case EINTR:
neintr++;
log_event_pause(2);
darg = save_arg;
break;
case EAGAIN:
/* cannot deliver upcall - process may be forking */
neagain++;
log_event_pause(nticks);
nticks <<= 1;
if (nticks > LOG_EVENT_MAX_PAUSE)
nticks = LOG_EVENT_MAX_PAUSE;
darg = save_arg;
break;
default:
cmn_err(CE_CONT,
"log_event_upcall: door_ki_upcall error %d\n",
error);
return (error);
}
}
if (neagain > 0 || neintr > 0) {
LOG_DEBUG((CE_CONT, "upcall: eagain=%d eintr=%d nticks=%d\n",
neagain, neintr, nticks));
}
LOG_DEBUG1((CE_CONT, "log_event_upcall:\n\t"
"error=%d rptr1=%p rptr2=%p dptr2=%p ret1=%x ret2=%x\n",
error, (void *)arg, (void *)darg.rbuf,
(void *)darg.data_ptr,
*((int *)(darg.rbuf)), *((int *)(darg.data_ptr))));
if (!error) {
/*
* upcall was successfully executed. Check return code.
*/
error = *((int *)(darg.rbuf));
}
return (error);
}
