[libvirt] overlayfs support to lxc driver

Hello. I'm interesting in implementing overlayfs support to lxc libvirt driver. As i see i simply can utilize filesystem type='template' for this usage. In case os template fs i need to mount with lowerdir /var/lib/libvirt/filesystems/template to /var/lib/libvirt/filesystems/name But i have problem: overlayfs fs need upperdir that store differences and mountpoint that used by clients. In case of libvirt usage - upperdir need to be places in /var/lib/libvirt/filesystems, but where i can put mountpoint dir ? /var/run/libvirt or in /tmp/libvirt-XXXXX ? Also what is the preferred way to integrate overlayfs support to libvirt? I can addd mount type to filesystem type='mount' or use (like now) template type. What is the preferred way? Thanks -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru