public override void Extend(long numberOfAdditionalBytes)
{
if (m_descriptor.DiskType == VirtualMachineDiskType.MonolithicFlat)
{
// Add updated extent entries
List <string> lines = VirtualMachineDiskDescriptor.ReadASCIITextLines(m_descriptorPath);
m_descriptor.ExtentEntries[0].SizeInSectors += numberOfAdditionalBytes / this.BytesPerSector;
m_descriptor.UpdateExtentEntries(lines);
File.WriteAllLines(m_descriptorPath, lines.ToArray(), Encoding.ASCII);
m_extent.Extend(numberOfAdditionalBytes);
}
else
{
throw new NotImplementedException("Extending a monolithic sparse is not supported");
}
}
/// <exception cref="System.IO.IOException"></exception>
/// <exception cref="System.IO.InvalidDataException"></exception>
/// <exception cref="System.NotImplementedException"></exception>
/// <exception cref="System.UnauthorizedAccessException"></exception>
public VirtualMachineDisk(string descriptorPath, bool isReadOnly) : base(descriptorPath)
{
m_descriptorPath = descriptorPath;
m_descriptor = VirtualMachineDiskDescriptor.ReadFromFile(m_descriptorPath);
bool isDescriptorEmbedded = false;
if (m_descriptor == null)
{
SparseExtent sparse;
try
{
sparse = new SparseExtent(m_descriptorPath);
}
catch (InvalidDataException)
{
throw new InvalidDataException("Missing VMDK descriptor");
}
if (sparse.Descriptor != null)
{
isDescriptorEmbedded = true;
m_descriptor = sparse.Descriptor;
m_extent = sparse;
}
else
{
throw new InvalidDataException("Missing VMDK descriptor");
}
}
if (m_descriptor.Version != 1)
{
throw new NotImplementedException("Unsupported VMDK descriptor version");
}
if (m_descriptor.ParentContentID != BaseDiskParentCID)
{
throw new InvalidDataException("VMDK descriptor ParentContentID does not match BaseDiskParentCID");
}
if (!isDescriptorEmbedded && m_descriptor.DiskType != VirtualMachineDiskType.MonolithicFlat)
{
throw new NotImplementedException("Unsupported VMDK disk type");
}
if (isDescriptorEmbedded && m_descriptor.DiskType != VirtualMachineDiskType.MonolithicSparse)
{
throw new NotImplementedException("Unsupported VMDK disk type");
}
foreach (VirtualMachineDiskExtentEntry extentEntry in m_descriptor.ExtentEntries)
{
if (!isDescriptorEmbedded && extentEntry.ExtentType != ExtentType.Flat)
{
throw new NotImplementedException("Unsupported VMDK extent type");
}
if (isDescriptorEmbedded && extentEntry.ExtentType != ExtentType.Sparse)
{
throw new NotImplementedException("Unsupported VMDK extent type");
}
}
if (m_descriptor.ExtentEntries.Count != 1)
{
throw new NotImplementedException("Unsupported number of VMDK extents");
}
if (m_descriptor.DiskType == VirtualMachineDiskType.MonolithicFlat)
{
VirtualMachineDiskExtentEntry entry = m_descriptor.ExtentEntries[0];
string directory = System.IO.Path.GetDirectoryName(descriptorPath);
string extentPath = directory + @"\" + entry.FileName;
DiskImage extent = new RawDiskImage(extentPath, BytesPerDiskSector, isReadOnly);
m_extent = extent;
}
}
