Arnd Bergmann wrote:
In order to support macvtap, we need a way to select the actual
tap endpoint. While it would be nice to pass it by network interface
name, passing the character device is more flexible, and we can
easily do both in the long run.
Signed-off-by: Arnd Bergmann <a...@arndb.de>
This isn't really a generic thing and I dislike pretending it is. This
is specifically for macvtap.
If we were going to do this, I'd rather introduce a -net macvtap that
actually allocated the interfaces (similar to how tap works). The
problem with this interface is that it's a two stage process. You have
to create an interface, then hand the name to qemu. It would be just as
easy to hand qemu an fd with a helper.
What's nice about -net tap is that with a little bit of setup
(/etc/qemu-ifup), it Just Works. -net tap,dev= does not share this
property.
I think this is a good place where an exec helper would be a natural fit.
Regards,
Anthony Liguori
