static void wait_for_event(void)
{
int ret;
fd_set inset;
evtchn_port_t port;
struct timeval tv;
int evtchn_fd;
if (xce_handle == NULL) {
nanosleep(&opts.poll_sleep, NULL);
return;
}
evtchn_fd = xenevtchn_fd(xce_handle);
FD_ZERO(&inset);
FD_SET(evtchn_fd, &inset);
tv.tv_sec = 1;
tv.tv_usec = 0;
// tv = millis_to_timespec(&opts.poll_sleep);
ret = select(evtchn_fd+1, &inset, NULL, NULL, &tv);
if ( (ret == 1) && FD_ISSET(evtchn_fd, &inset)) {
if ((port = xenevtchn_pending(xce_handle)) == -1)
perror("Failed to read from event fd");
// if (port == virq_port)
// printf("got the event I was looking for\r\n");
if (xenevtchn_unmask(xce_handle, port) == -1)
perror("Failed to write to event fd");
}
}
static void xen_9pfs_evtchn_event(void *opaque)
{
Xen9pfsRing *ring = opaque;
evtchn_port_t port;
port = xenevtchn_pending(ring->evtchndev);
xenevtchn_unmask(ring->evtchndev, port);
qemu_bh_schedule(ring->bh);
}
int main(int argc, char *argv[])
{
int rc;
atexit(cleanup);
xch = xc_interface_open(NULL, NULL, 0);
if (xch == NULL)
{
perror("Failed to open xc interface");
return 1;
}
xce_handle = xenevtchn_open(NULL, 0);
if (xce_handle == NULL)
{
perror("Failed to open evtchn device");
return 2;
}
xs_handle = xs_daemon_open();
if (xs_handle == NULL)
{
perror("Failed to open xenstore connection");
return 3;
}
if ((rc = xenevtchn_bind_virq(xce_handle, VIRQ_ENOMEM)) == -1)
{
perror("Failed to bind to domain exception virq port");
return 4;
}
virq_port = rc;
while(1)
{
evtchn_port_t port;
if ((port = xenevtchn_pending(xce_handle)) == -1)
{
perror("Failed to listen for pending event channel");
return 5;
}
if (port != virq_port)
{
char data[BUFSZ];
snprintf(data, BUFSZ, "Wrong port, got %d expected %d", port, virq_port);
perror(data);
return 6;
}
if (xenevtchn_unmask(xce_handle, port) == -1)
{
perror("Failed to unmask port");
return 7;
}
printf("Got a virq kick, time to get work\n");
handle_low_mem();
}
return 0;
}
