Re: [Xen-devel] Re: [patch] netfront: unregister net device at backend_changed() if network_connect() failed

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 19/11/08 02:13, "Joe Jin" <joe.jin@xxxxxxxxxx> wrote:

>> Have you actually seen this problem occur, in stress tests or elsewhere? Or
>> is this just a 'nice to have'? If the former I'd rather fix the bug!
>> 
> 
> At vm config file set vif type to ioemu and booting guest with pv driver,
> always saw the interface, unregister the device when network_connect(),
> I just saw one nic with 8139 driver.

I think failure to connect in frontend should always be a bug condition.

In this case, xend shouldn't be creating front and back directories at all.
What happens if you make netif's getDeviceDetails() return None for devid if
type == 'ioemu'? This should cause DevController.py not to set up the
front/back details and netfront.c will never get triggered.

Just need to make sure ioemu's netdevice still works. Including across
save/restore. :-)

 -- Keir



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