/* Called by xenbus when our backend node changes state */
static void
pcifront_backend_changed(struct xenbus_device *xdev,
XenbusState be_state)
{
struct pcifront_device *pdev = xdev->data;
switch (be_state) {
case XenbusStateClosing:
DPRINTF("backend closing (%s)\n", xdev->nodename);
pcifront_disconnect(pdev);
break;
case XenbusStateClosed:
DPRINTF("backend closed (%s)\n", xdev->nodename);
pcifront_disconnect(pdev);
break;
case XenbusStateConnected:
DPRINTF("backend connected (%s)\n", xdev->nodename);
pcifront_connect(pdev);
break;
default:
break;
}
}
static int pcifront_try_disconnect(struct pcifront_device *pdev)
{
int err = 0;
enum xenbus_state prev_state;
spin_lock(&pdev->dev_lock);
prev_state = xenbus_read_driver_state(pdev->xdev->nodename);
if (prev_state >= XenbusStateClosing)
goto out;
if(prev_state == XenbusStateConnected) {
pcifront_free_roots(pdev);
pcifront_disconnect(pdev);
}
err = xenbus_switch_state(pdev->xdev, XenbusStateClosed);
out:
spin_unlock(&pdev->dev_lock);
return err;
}
