[libvirt] virStoragePoolGetXMLDesc - how to specify format type

Hi, I'm trying to write virStoragePoolGetXMLDesc() for XenAPI remote storage. I'd like to produce an XML similar to this <pool type="netfs"> <name>....</name> <uuid>....</uuid> <source> <format type="nfs"/> <host name="telos"/> <dir path="/images"/> </source> </pool> I'm trying to fill in the virStoragePoolDefPtr for this. I need to know if struct _virStoragePoolSource->format Is the one to fill for format type="nfs". It's seemingly an integer. Is there any enum for format types for Nfs and ext3? I couldn't find any in storage_conf.h My next query is, when would I have to fill in device path? What is it used for And which pool types use it for remote storage? Could someone explain? Regards, Sharadha