private void ResolveFileChain()
{
VirtualDiskLayer file = _files[_files.Count - 1].First;
while (file.NeedsParent)
{
bool foundParent = false;
FileLocator locator = file.RelativeFileLocator;
foreach (string posParent in file.GetParentLocations())
{
if (locator.Exists(posParent))
{
file = VirtualDisk.OpenDiskLayer(file.RelativeFileLocator, posParent, FileAccess.Read);
_files.Add(new ThinkAway.Tuple <VirtualDiskLayer, Ownership>(file, Ownership.Dispose));
foundParent = true;
break;
}
}
if (!foundParent)
{
throw new IOException("Parent disk not found");
}
}
}
private static DiskCreateType DiffDiskCreateType(VirtualDiskLayer layer)
{
DiskImageFile vmdkLayer = layer as DiskImageFile;
if (vmdkLayer != null)
{
switch (vmdkLayer.CreateType)
{
case DiskCreateType.FullDevice:
case DiskCreateType.MonolithicFlat:
case DiskCreateType.MonolithicSparse:
case DiskCreateType.PartitionedDevice:
case DiskCreateType.StreamOptimized:
case DiskCreateType.TwoGbMaxExtentFlat:
case DiskCreateType.TwoGbMaxExtentSparse:
return(DiskCreateType.MonolithicSparse);
default:
return(DiskCreateType.VmfsSparse);
}
}
else
{
return(DiskCreateType.MonolithicSparse);
}
}
/// <summary>
/// Create a new differencing disk.
/// </summary>
/// <param name="path">The path (or URI) for the disk to create.</param>
/// <returns>The newly created disk.</returns>
public override VirtualDisk CreateDifferencingDisk(string path)
{
VirtualDiskLayer firstLayer = _files[0].Item1;
return(InitializeDifferencing(path, DiffDiskCreateType(firstLayer),
firstLayer.RelativeFileLocator.GetFullPath(_path)));
}
private static DiskCreateType DiffDiskCreateType(VirtualDiskLayer layer)
{
DiskImageFile vmdkLayer = layer as DiskImageFile;
if (vmdkLayer != null)
{
switch (vmdkLayer.CreateType)
{
case DiskCreateType.FullDevice:
case DiskCreateType.MonolithicFlat:
case DiskCreateType.MonolithicSparse:
case DiskCreateType.PartitionedDevice:
case DiskCreateType.StreamOptimized:
case DiskCreateType.TwoGbMaxExtentFlat:
case DiskCreateType.TwoGbMaxExtentSparse:
return DiskCreateType.MonolithicSparse;
default:
return DiskCreateType.VmfsSparse;
}
}
else
{
return DiskCreateType.MonolithicSparse;
}
}