Re: [Qemu-devel] [PATCH] tap: add the possibility to specify a tap prefix

[Paolo Bonzini <pbonzini@redhat.com>]

Il 14/01/2014 18:15, William Dauchy ha scritto:
> this will permit to specify an interface prefix to the tap instead of the
> default one ("tap")
> this functionnality is useful when you need an easy way to find the
> interfaces attached to a given virtual machine
> 
> example:
>  -net bridge,prefix=tapvmA. -net bridge,prefix=tapvmA.
>  will create `tapvmA.0` and `tapvmA.1`
>  `brctl show | grep vmA` will be an easy way to find the interfaces
>  attached to the vmA
> 
> Signed-off-by: <william@gandi.net>

I think this was nacked already in the past.  You would need to
implement some kind of ACL system like the one that is in place for
bridges.  Without it, for example, you could hijack existing iptables rules.

Sorry for the bad news. :)

Paolo