On Sat, Aug 10, 2013 at 08:33:17PM -0600, Joshua McKee wrote:
> Sorry, I accidentally hit send before I was done. Here's the finished
> message:
>
> Thanks! Unfortunately, I am running into the following issue when
> attempting to use the generic ethernet configuration:
>
> $ virsh -c qemu:///system create /tmp/generic.xml
> error: Failed to create domain from /tmp/generic.xml
> error: internal error process exited while connecting to monitor: kvm:
> -netdev tap,id=hostnet0: could not configure /dev/net/tun: Operation not
> permitted
> kvm: -netdev tap,id=hostnet0: Device 'tap' could not be initialized
>
> This is the network part of my xml file:
>
> ...
> <devices>
>    <interface type="ethernet"/>
>    ...
>    <interface type="ethernet'>
>       <target dev="tap0"/>
>       <script path='/etc/qemu-ifup'/>
>    </interface>
>    ...
> </devices>
> ...
>
> In my /etc/libvirt/qemu.conf file I have the following set:
>
> user = "root"
> group ="root"
> dynamic ownership = 0
> clear_emulator_capabilities = 0
> cgroup_device_acl = [
>     "/dev/null", "/dev/full", "/dev/zero",
>     "/dev/random", "/dev/urandom",
>     "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
>     "/dev/rtc", "/dev/hpet",
>     "/dev/net/tun",
> ]

You did restart libvirtd after making those setting changes, right ?
The user, group & clear_emulator_capabilities settings are the 3 that
matter here & you have them correctly set.

> I am running Ubuntu 12, which does not use SELinux.

It has apparmour though, which possibly denies access to /dev/net/tun

Daniel
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