On 09/11/2014 11:54 AM, Peter Krempa wrote:
To express empty drive we historically use storage source with empty path. Unfortunately NBD disks may be declared without a path.
Add a helper to wrap this logic. --- src/libvirt_private.syms | 1 + src/util/virstoragefile.c | 20 ++++++++++++++++++++ src/util/virstoragefile.h | 1 + 3 files changed, 22 insertions(+)
ACK. If I remember right from my virDomainBlockCopy code (commit 37588b25), empty paths are allowed for device types of cdrom, floppy, and lun, but forbidden at parse time for type='block'<disk device='cdrom'> and <disk device='floppy'> but notionally forbidden for <disk device='disk'>.
+ * Returns true if @src points to an empty storage source. + */ +bool +virStorageSourceIsEmpty(virStorageSourcePtr src)
Maybe the comment is better as: Returns true if the guest disk has no associated host storage source (such as an empty cdrom drive). -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org