libvirt hook qemu suse12

Question

we have this qemu hook. In suse 11 was working well but in suse 12 it is not working. The hook is setting the ports in openvswitch native-untagged. Do you know if there is some libvirt missing configuration in suse 12 for the hook to work? We are using this version of libvirt: libvirtd (libvirt) 1.2.5

Thanks and BR/ Cristina

#!/bin/bash

#/etc/libvirt/hooks/qemu
domain_name="$1"
domain_task="$2"

# Create temporary file to hold the configuration.
guest_cfg=`mktemp`

function cleanup() {
  if [ -n "$guest_cfg" ]; then
   rm -f $guest_cfg
  fi
}

trap cleanup EXIT

function ovs_untag_port() {
  # Read XML configuration on stdin.
  cat - > $guest_cfg
  ifaces=`xpath $guest_cfg         

"count(//devices/interface[@type='network']/target[@dev])" 2>/dev/null`
 for i in `seq 1 $ifaces`; do
 interface=`xpath $guest_cfg "//devices/interface[$i]  

[@type='network']/target[@dev]" 2>/dev/null | cut -d \" -f2`
echo ${interface}
ovs-vsctl set port ${interface} vlan_mode=native-untagged
 done
 cleanup

}


case "${domain_task}" in
  prepare)
    ovs_untag_port
    ;;
  start)
    ;;
  started)
    ovs_untag_port
    ;;
  stopped)
    ;;
  release)
    ;;
  migrate)
    ;;
  restore)
    ;;
  reconnect)
    ;;
  attach)
    ;;
  *)
    exit 0
    echo "qemu hook called with unexpected options $*" >&2
    ;;
esac

exit 0