private void Initialize()
{
_fileStream.Position = 0;
FileHeader fileHeader = Utilities.ReadStruct <FileHeader>(_fileStream);
if (!fileHeader.IsValid)
{
throw new IOException("Invalid VHDX file - file signature mismatch");
}
_freeSpace = new FreeSpaceTable(_fileStream.Length);
ReadHeaders();
ReplayLog();
ReadRegionTable();
ReadMetadata();
_batStream = OpenRegion(RegionTable.BatGuid);
_freeSpace.Reserve(BatControlledFileExtents());
// Indicate the file is open for modification
if (_fileStream.CanWrite)
{
_header.FileWriteGuid = Guid.NewGuid();
WriteHeader();
}
}
public Chunk(Stream bat, SparseStream file, FreeSpaceTable freeSpace, FileParameters fileParameters, int chunk, int blocksPerChunk)
{
_bat = bat;
_file = file;
_freeSpace = freeSpace;
_fileParameters = fileParameters;
_chunk = chunk;
_blocksPerChunk = blocksPerChunk;
_bat.Position = _chunk * (_blocksPerChunk + 1) * 8;
_batData = Utilities.ReadFully(bat, (_blocksPerChunk + 1) * 8);
}
public Chunk(Stream bat, SparseStream file, FreeSpaceTable freeSpace, FileParameters fileParameters, int chunk, int blocksPerChunk)
{
_bat = bat;
_file = file;
_freeSpace = freeSpace;
_fileParameters = fileParameters;
_chunk = chunk;
_blocksPerChunk = blocksPerChunk;
_bat.Position = _chunk * (_blocksPerChunk + 1) * 8;
_batData = Utilities.ReadFully(bat, (_blocksPerChunk + 1) * 8);
}
public ContentStream(SparseStream fileStream, Stream batStream, FreeSpaceTable freeSpaceTable, Metadata metadata, long length, SparseStream parentStream, Ownership ownsParent)
{
_fileStream = fileStream;
_batStream = batStream;
_freeSpaceTable = freeSpaceTable;
_metadata = metadata;
_fileParameters = _metadata.FileParameters;
_length = length;
_parentStream = parentStream;
_ownsParent = ownsParent;
_chunks = new ObjectCache<int, Chunk>();
}
public ContentStream(SparseStream fileStream, Stream batStream, FreeSpaceTable freeSpaceTable, Metadata metadata, long length, SparseStream parentStream, Ownership ownsParent)
{
_fileStream = fileStream;
_batStream = batStream;
_freeSpaceTable = freeSpaceTable;
_metadata = metadata;
_fileParameters = _metadata.FileParameters;
_length = length;
_parentStream = parentStream;
_ownsParent = ownsParent;
_chunks = new ObjectCache <int, Chunk>();
}
private void Initialize()
{
_fileStream.Position = 0;
FileHeader fileHeader = Utilities.ReadStruct<FileHeader>(_fileStream);
if (!fileHeader.IsValid)
{
throw new IOException("Invalid VHDX file - file signature mismatch");
}
_freeSpace = new FreeSpaceTable(_fileStream.Length);
ReadHeaders();
if (_header.LogGuid != Guid.Empty)
{
throw new NotSupportedException("Detected VHDX file with replay log - not yet supported");
}
_freeSpace.Reserve((long)_header.LogOffset, _header.LogLength);
ReadRegionTable();
ReadMetadata();
_batStream = OpenRegion(RegionTable.BatGuid);
_freeSpace.Reserve(BatControlledFileExtents());
// Indicate the file is open for modification
if (_fileStream.CanWrite)
{
_header.FileWriteGuid = Guid.NewGuid();
WriteHeader();
}
}
