func (p *VirStoragePool) StorageVolCreateXMLFrom(xmlConfig string, clonevol VirStorageVol, flags uint32) (VirStorageVol, error) {
cXml := C.CString(string(xmlConfig))
defer C.free(unsafe.Pointer(cXml))
ptr := C.virStorageVolCreateXMLFrom(p.ptr, cXml, clonevol.ptr, C.uint(flags))
if ptr == nil {
return VirStorageVol{}, GetLastError()
}
return VirStorageVol{ptr: ptr}, nil
}
// CreateStorageVolumeFrom creates a storage volume in the parent pool, using
// the "cloneVol" volume as input. Information for the new volume (name, perms)
// are passed via a typical volume XML description.
// Since 1.0.1 VolCreatePreallocMetadata in "flags" can be used to get higher
// performance with qcow2 image files which don't support full preallocation, by
// creating a sparse image file with metadata.
// "Free" should be used to free the resources after the storage volume object
// is no longer needed.
func (pool StoragePool) CreateStorageVolumeFrom(xml string, cloneVol StorageVolume, flags StorageVolumeCreateFlag) (StorageVolume, error) {
cXML := C.CString(xml)
defer C.free(unsafe.Pointer(cXML))
pool.log.Printf("creating storage volume from another volume (flags = %v)...\n", flags)
cVol := C.virStorageVolCreateXMLFrom(pool.virStoragePool, cXML, cloneVol.virStorageVol, C.uint(flags))
if cVol == nil {
err := LastError()
pool.log.Printf("an error occurred: %v\n", err)
return StorageVolume{}, err
}
pool.log.Println("volume created")
storageVolume := StorageVolume{
log: pool.log,
virStorageVol: cVol,
}
return storageVolume, nil
}