Re: [Xen-devel] Re: Linux Stubdom Problem

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 9 Nov 2011, Jiageng Yu wrote:
> The keyboard driver is OK now. I am working on network device. In
> linux stubdom, I have udev, ifconfig and brctl tools. After udevd
> started, stubdom executes "ifconfig eth0 IPadderss netmask netgate up"
> to setup the network. When qemu in stubdom creates a tapxx interface
> for hvm guest,  the script should be executed to build a net bridge.
> 
>       /sbin/brctl addbr eth0
>       /sbin/brctl addif eth0 tapXX
> 
> Therefore, the hvm guest has the network device. Is this plan
> reasonable? Or have better one?

The bridge should be called xenbr0, the stubdom's network interface
(that should probably called eth0) should be added to the bridge at boot
time.

Like you said, when qemu starts is going to create a tap interface, on
Linux usually we rely on a udev script to add the tap interface to the
bridge. The script is tools/hotplug/Linux/vif-setup, that calls
tools/hotplug/Linux/vif-bridge.

So at the end you have:

xenbr0 (bridge)
||
|+-------------------------------+
|                                |
eth0                             |
(stubdom network interface)      tapXX
                                 (qemu's tap interface)

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