static int suspend_guest(xc_interface *xch, xc_evtchn *xce, int domid,
int *evtchn, int *lockfd)
{
int port, rc, suspend_evtchn = -1;
*lockfd = -1;
if (!evtchn)
return -1;
port = xs_suspend_evtchn_port(domid);
if (port < 0)
{
fprintf(stderr, "DOM%d: No suspend port, try live migration\n", domid);
goto failed;
}
suspend_evtchn = xc_suspend_evtchn_init_exclusive(xch, xce, domid,
port, lockfd);
if (suspend_evtchn < 0)
{
fprintf(stderr, "Suspend evtchn initialization failed\n");
goto failed;
}
*evtchn = suspend_evtchn;
rc = xc_evtchn_notify(xce, suspend_evtchn);
if (rc < 0)
{
fprintf(stderr, "Failed to notify suspend channel: errno %d\n", rc);
goto failed;
}
if (xc_await_suspend(xch, xce, suspend_evtchn) < 0)
{
fprintf(stderr, "Suspend Failed\n");
goto failed;
}
return 0;
failed:
if (suspend_evtchn != -1)
xc_suspend_evtchn_release(xch, xce, domid,
suspend_evtchn, lockfd);
return -1;
}
/* Set up event channel used to signal a guest to suspend itself */
static int setup_suspend_evtchn(checkpoint_state* s)
{
int port;
port = xs_suspend_evtchn_port(s->domid);
if (port < 0) {
s->errstr = "failed to read suspend event channel";
return -1;
}
s->suspend_evtchn = xc_suspend_evtchn_init(s->xch, s->xce, s->domid, port);
if (s->suspend_evtchn < 0) {
s->errstr = "failed to bind suspend event channel";
return -1;
}
fprintf(stderr, "bound to suspend event channel %u:%d as %d\n", s->domid, port,
s->suspend_evtchn);
return 0;
}
