Xen devel - May 2007 - Xenbus state and domain state are different or same?

Hi All,

Following definition is from Xen-3.0.4-1 src.

static void backend_changed(struct xenbus_device *dev,
			    enum xenbus_state backend_state)
{
	struct netfront_info *np = dev->dev.driver_data;
	struct net_device *netdev = np->netdev;

	DPRINTK("%s\n", xenbus_strstate(backend_state));

	switch (backend_state) {
	case XenbusStateInitialising:
	case XenbusStateInitialised:
	case XenbusStateConnected:
	case XenbusStateUnknown:
	case XenbusStateClosed:
		break;

	case XenbusStateInitWait:
		if (dev->state != XenbusStateInitialising)
			break;
		if (network_connect(netdev) != 0)
			break;
		xenbus_switch_state(dev, XenbusStateConnected);
		(void)send_fake_arp(netdev);
		break;

	case XenbusStateClosing:
		xenbus_frontend_closed(dev);
		break;
	}
}

Now my query is, Can backend state of backend domain  different from
that of dev->state here as depicted here -
  case XenbusStateInitWait:
		if (dev->state != XenbusStateInitialising)

Does this means that state of the backend domain and that of the
Xenbus may not necessarily be same for the frontend Domain?

Thanks in advance

--psr
-- 
---
pradeep singh rautela

"Genius is 1% inspiration, and 99% perspiration" - not me :)

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