/// <summary>
/// Creates a new virtual disk that is a linked clone of an existing disk.
/// </summary>
/// <param name="fileSystem">The file system to create the VMDK on</param>
/// <param name="path">The path to the new disk</param>
/// <param name="type">The type of the new disk</param>
/// <param name="parent">The disk to clone</param>
/// <returns>The new virtual disk</returns>
public static DiskImageFile InitializeDifferencing(DiscFileSystem fileSystem, string path, DiskCreateType type, string parent)
{
if (type != DiskCreateType.MonolithicSparse && type != DiskCreateType.TwoGbMaxExtentSparse && type != DiskCreateType.VmfsSparse)
{
throw new ArgumentException("Differencing disks must be sparse", "type");
}
string basePath = Utilities.GetDirectoryFromPath(path);
FileLocator locator = new DiscFileLocator(fileSystem, basePath);
FileLocator parentLocator = locator.GetRelativeLocator(Utilities.GetDirectoryFromPath(parent));
using (DiskImageFile parentFile = new DiskImageFile(parentLocator, Utilities.GetFileFromPath(parent), FileAccess.Read))
{
DescriptorFile baseDescriptor = CreateDifferencingDiskDescriptor(type, parentFile, parent);
return DoInitialize(locator, Utilities.GetFileFromPath(path), parentFile.Capacity, type, baseDescriptor);
}
}
private static DescriptorFile CreateDifferencingDiskDescriptor(DiskCreateType type, DiskImageFile parent, string parentPath)
{
DescriptorFile baseDescriptor = new DescriptorFile();
baseDescriptor.ContentId = (uint)_rng.Next();
baseDescriptor.ParentContentId = parent.ContentId;
baseDescriptor.ParentFileNameHint = parentPath;
baseDescriptor.CreateType = type;
return baseDescriptor;
}
/// <summary>
/// Creates a new virtual disk that is a linked clone of an existing disk.
/// </summary>
/// <param name="path">The path to the new disk</param>
/// <param name="type">The type of the new disk</param>
/// <param name="parent">The disk to clone</param>
/// <returns>The new virtual disk</returns>
public static DiskImageFile InitializeDifferencing(string path, DiskCreateType type, string parent)
{
if (type != DiskCreateType.MonolithicSparse && type != DiskCreateType.TwoGbMaxExtentSparse && type != DiskCreateType.VmfsSparse)
{
throw new ArgumentException("Differencing disks must be sparse", "type");
}
using (DiskImageFile parentFile = new DiskImageFile(parent, FileAccess.Read))
{
DescriptorFile baseDescriptor = CreateDifferencingDiskDescriptor(type, parentFile, parent);
FileLocator locator = new LocalFileLocator(Path.GetDirectoryName(path));
return DoInitialize(locator, Path.GetFileName(path), parentFile.Capacity, type, baseDescriptor);
}
}