int xc_suspend_evtchn_init(xc_interface *xch, xc_evtchn *xce, int domid, int port)
{
int rc, suspend_evtchn = -1;
if (lock_suspend_event(xch, domid))
return -EINVAL;
suspend_evtchn = xc_evtchn_bind_interdomain(xce, domid, port);
if (suspend_evtchn < 0) {
ERROR("failed to bind suspend event channel: %d", suspend_evtchn);
goto cleanup;
}
rc = xc_domain_subscribe_for_suspend(xch, domid, port);
if (rc < 0) {
ERROR("failed to subscribe to domain: %d", rc);
goto cleanup;
}
/* event channel is pending immediately after binding */
xc_await_suspend(xch, xce, suspend_evtchn);
return suspend_evtchn;
cleanup:
xc_suspend_evtchn_release(xch, xce, domid, suspend_evtchn);
return -1;
}
int xc_suspend_evtchn_init_sane(xc_interface *xch, xc_evtchn *xce,
int domid, int port, int *lockfd)
{
int rc, suspend_evtchn = -1;
if (lock_suspend_event(xch, domid, lockfd)) {
errno = EINVAL;
goto cleanup;
}
suspend_evtchn = xc_evtchn_bind_interdomain(xce, domid, port);
if (suspend_evtchn < 0) {
ERROR("failed to bind suspend event channel: %d", suspend_evtchn);
goto cleanup;
}
rc = xc_domain_subscribe_for_suspend(xch, domid, port);
if (rc < 0) {
ERROR("failed to subscribe to domain: %d", rc);
goto cleanup;
}
return suspend_evtchn;
cleanup:
xc_suspend_evtchn_release(xch, xce, domid, suspend_evtchn, lockfd);
return -1;
}
