[sheepdog] [Openstack-dev][Sheepdog]Add a new driver for Openstack Cinder like Sheepdog volumes

[harryxiyou]

Hi Morita and other developers,

If i add a QEMU/Libvirt driver(the same as Sheepdog volumes driver in
Openstack Cinder branch) to let Openstack Cinder support a new block-level
storage system, I should change following stuffs, right?

1, Add a driver file to the dir in Openstack Cinder branch(the same as
sheepdog.py),
      https://github.com/openstack/cinder/blob/master/cinder/volume/drivers
2, Change the file in Openstack Nova branch(Let libvirt attach HLFS volumes
to QEMU, the same as sheepdog)，
      https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py

Do I should change/add any other files for Openstack? Cloud anyone give me
some suggestions?    Thanks in advance ;-)

-- 
Thanks
Harry Wei