/*===========================================================================*
* sef_cb_signal_manager *
*===========================================================================*/
static int sef_cb_signal_manager(endpoint_t target, int signo)
{
/* Process system signal on behalf of the kernel. */
int target_p;
struct rproc *rp;
message m;
/* Lookup slot. */
if(rs_isokendpt(target, &target_p) != OK || rproc_ptr[target_p] == NULL) {
if(rs_verbose)
printf("RS: ignoring spurious signal %d for process %d\n",
signo, target);
return OK; /* clear the signal */
}
rp = rproc_ptr[target_p];
/* Don't bother if a termination signal has already been processed. */
if((rp->r_flags & RS_TERMINATED) && !(rp->r_flags & RS_EXITING)) {
return EDEADEPT; /* process is gone */
}
/* Ignore external signals for inactive service instances. */
if( !(rp->r_flags & RS_ACTIVE) && !(rp->r_flags & RS_EXITING)) {
if(rs_verbose)
printf("RS: ignoring signal %d for inactive %s\n",
signo, srv_to_string(rp));
return OK; /* clear the signal */
}
if(rs_verbose)
printf("RS: %s got %s signal %d\n", srv_to_string(rp),
SIGS_IS_TERMINATION(signo) ? "termination" : "non-termination",signo);
/* Print stacktrace if necessary. */
if(SIGS_IS_STACKTRACE(signo)) {
sys_diagctl_stacktrace(target);
}
/* In case of termination signal handle the event. */
if(SIGS_IS_TERMINATION(signo)) {
rp->r_flags |= RS_TERMINATED;
terminate_service(rp);
rs_idle_period();
return EDEADEPT; /* process is now gone */
}
/* Never deliver signals to VM. */
if (rp->r_pub->endpoint == VM_PROC_NR) {
return OK;
}
/* Translate every non-termination signal into a message. */
m.m_type = SIGS_SIGNAL_RECEIVED;
m.m_pm_lsys_sigs_signal.num = signo;
rs_asynsend(rp, &m, 1);
return OK; /* signal has been delivered */
}
/*===========================================================================*
* main *
*===========================================================================*/
PUBLIC int main(void)
{
/* This is the main routine of this service. The main loop consists of
* three major activities: getting new work, processing the work, and
* sending the reply. The loop never terminates, unless a panic occurs.
*/
message m; /* request message */
int ipc_status; /* status code */
int call_nr, who_e,who_p; /* call number and caller */
int result; /* result to return */
int s;
/* SEF local startup. */
sef_local_startup();
if (OK != (s=sys_getmachine(&machine)))
panic("couldn't get machine info: %d", s);
/* Main loop - get work and do it, forever. */
while (TRUE) {
/* Wait for request message. */
get_work(&m, &ipc_status);
who_e = m.m_source;
if(rs_isokendpt(who_e, &who_p) != OK) {
panic("message from bogus source: %d", who_e);
}
call_nr = m.m_type;
/* Now determine what to do. Four types of requests are expected:
* - Heartbeat messages (notifications from registered system services)
* - System notifications (synchronous alarm)
* - User requests (control messages to manage system services)
* - Ready messages (reply messages from registered services)
*/
/* Notification messages are control messages and do not need a reply.
* These include heartbeat messages and system notifications.
*/
if (is_ipc_notify(ipc_status)) {
switch (who_p) {
case CLOCK:
do_period(&m); /* check services status */
continue;
default: /* heartbeat notification */
if (rproc_ptr[who_p] != NULL) { /* mark heartbeat time */
rproc_ptr[who_p]->r_alive_tm = m.NOTIFY_TIMESTAMP;
} else {
printf("RS: warning: got unexpected notify message from %d\n",
m.m_source);
}
}
}
/* If we get this far, this is a normal request.
* Handle the request and send a reply to the caller.
*/
else {
if (call_nr != COMMON_GETSYSINFO &&
(call_nr < RS_RQ_BASE || call_nr >= RS_RQ_BASE+0x100))
{
/* Ignore invalid requests. Do not try to reply. */
printf("RS: warning: got invalid request %d from endpoint %d\n",
call_nr, m.m_source);
continue;
}
/* Handler functions are responsible for permission checking. */
switch(call_nr) {
/* User requests. */
case RS_UP: result = do_up(&m); break;
case RS_DOWN: result = do_down(&m); break;
case RS_REFRESH: result = do_refresh(&m); break;
case RS_RESTART: result = do_restart(&m); break;
case RS_SHUTDOWN: result = do_shutdown(&m); break;
case RS_UPDATE: result = do_update(&m); break;
case RS_CLONE: result = do_clone(&m); break;
case RS_EDIT: result = do_edit(&m); break;
case COMMON_GETSYSINFO:
result = do_getsysinfo(&m); break;
case RS_LOOKUP: result = do_lookup(&m); break;
/* Ready messages. */
case RS_INIT: result = do_init_ready(&m); break;
case RS_LU_PREPARE: result = do_upd_ready(&m); break;
default:
printf("RS: warning: got unexpected request %d from %d\n",
m.m_type, m.m_source);
result = EINVAL;
}
/* Finally send reply message, unless disabled. */
if (result != EDONTREPLY) {
m.m_type = result;
reply(who_e, NULL, &m);
}
}
}
}
