On Tue, Jan 20, 2009 at 04:44:22PM +0100, Daniel Schwager wrote: > Hi Daniel, > > thx for the fast answer. > > > QEMU is responsible for passing arguments to the interface scripts, > > so its out of libvirt's control. QEMU passes a single paramter to > > the script, which is the name of the TAP device interface being > > added. If you don't give a <target dev='tap3'> libvirt generates > > a TAP device name vnetXXXX. > > If I do not specify the <target>-element inside of <interface>, > your docu told me > > "The guest will have a tun device created with a name of vnetN, > which can also be overridden with the <target> element." > (http://www.libvirt.org/formatdomain.html#elementsNICS) > > I understood this in the following way: I can remove the target-element > and > I will get automatically a target name "vnet<N>" - if I do this, I will > get an > interfacename "(null") : > > 5459 ? Sl 0:01 /usr/bin/kvm -S -M pc -m 500 -smp 1 -name > solidcam -uuid 60a8db24-86a5-f9fc-16ee-b60b32411dd8 -monitor pty -boot c > -drive file=/srv/winxp127-xxx.dsk,if=ide,index=0,boot=on -net > nic,macaddr=52:54:00:46:58:41,vlan=0 -net > tap,ifname=(null),script=/etc/kvm/qemu-ifup,vlan=0 -serial pty -parallel > none -usb -usbdevice tablet -vnc 0.0.0.0:0 That is a bug I'm afraid - it *should* pass the real auto-generated interface name but for some reason it isn't. I see this is one of the XML configs we don't have tested in our xml -> ARGV conversion test. > So, this means libvirt is NOT responsible for the naming auf the target. > Maybe you have to clarify this in the docu. > For my case, I have to write a domain-xml dynamically and specify the > interface name (target-element) to the domain-xml > like > > <interface type='ethernet'> > <script path='/etc/kvm/qemu-ifup'/> > <target dev='my-new-name001122'/> > </interface> Yes, explicitly giving a interface name is a reasonable workaround until i fix the bug. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :| -- Libvir-list mailing list Libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list