[libvirt] [PATCH 0/2] Modify generic ethernet interface so it will work when sVirt is enabled with qemu

Tyler Coumbes coumbes at gmail.com
Tue Sep 20 23:16:55 UTC 2011

Currently you cannot use generic ethernet interfaces with qemu when
sVirt is enabled. This is because
libvirt was having qemu handle the TAP creation and it doesn't have
the rights to do so.

This patch changes it so that libvirt handles and TAP creation and
deletion. Passing the TAP as
a file descriptor to qemu instead. Backwards capability has been
maintained in the following manner.

If a script is defined for the interface in the domain XML then it
uses the old method of having
qemu create the TAP and running the ifup script. If a script is not
defined then the new method
is used. When used with a script(old method) you will still be unable
to use sVirt. You can use the
old method without running a script. To do this define script='no'
this will use the old method,
but without a script.

I have been running this patched version for while now on Fedora 15. I
haven't ran into any issues.
Hopefully I didn't miss anything.

Previous patch proposal



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