public void Create(ulong driveSize)
{
Header = new VhdFooter();
Header.InitDefaults();
Header.OrigSize = driveSize.EndianSwap();
Header.CurSize = driveSize.EndianSwap();
DynamicDiskHeader = new VhdDynamicDiskHeader();
DynamicDiskHeader.InitDefaults();
var batEntryCount = (uint)(driveSize/DynamicDiskHeader.BlockSize.EndianSwap());
BlockAllocationTable = new uint[(int) batEntryCount];
for (uint i = 0; i < batEntryCount; i++)
BlockAllocationTable[i] = 0xFFFFFFFF;
DynamicDiskHeader.MaxTableEntries = batEntryCount.EndianSwap();
Header.CalculateChecksum();
DynamicDiskHeader.CalculateChecksum();
}
public void Create(ulong driveSize)
{
Header = new VhdFooter();
Header.InitDefaults();
Header.OrigSize = driveSize.EndianSwap();
Header.CurSize = driveSize.EndianSwap();
DynamicDiskHeader = new VhdDynamicDiskHeader();
DynamicDiskHeader.InitDefaults();
var batEntryCount = (uint)(driveSize / DynamicDiskHeader.BlockSize.EndianSwap());
BlockAllocationTable = new uint[(int)batEntryCount];
for (uint i = 0; i < batEntryCount; i++)
{
BlockAllocationTable[i] = 0xFFFFFFFF;
}
DynamicDiskHeader.MaxTableEntries = batEntryCount.EndianSwap();
Header.CalculateChecksum();
DynamicDiskHeader.CalculateChecksum();
}
public bool ConvertToVhd(string destFile)
{
if (IsEncrypted)
return false;
// xvd -> vhd conversion just needs the FS data extracted with a vhd footer put at the end
// seems to work for older OS XVDs, newer XVCs use a 4k sector size though and windows VHD driver doesn't like it, not sure what new OS XVDs use
// todo: look into converting 4k sectors to 512
using(var vhdFile = new IO(destFile, FileMode.Create))
{
_io.Stream.Position = (long)DataOffset;
if (IsXvcFile) // if it's an XVC file then find the correct XVC data offset
{
bool foundFs = false;
foreach (var hdr in RegionHeaders)
{
if (hdr.Description == "FS-MD" || hdr.Id == 0x40000002)
{
foundFs = true;
_io.Stream.Position = (long)hdr.Offset;
break;
}
}
if (!foundFs)
{ // no FS-MD in the file, older XVCs seem to use the last region for it
_io.Stream.Position = (long)RegionHeaders[RegionHeaders.Count - 1].Offset;
}
}
vhdFile.Stream.Position = 0;
var driveSize = (long)Header.DriveSize;
while (_io.Stream.Length > _io.Stream.Position)
{
long toRead = 0x4000;
if (_io.Stream.Position + toRead > _io.Stream.Length)
toRead = _io.Stream.Length - _io.Stream.Position;
byte[] data = _io.Reader.ReadBytes((int) toRead);
vhdFile.Writer.Write(data);
}
vhdFile.Stream.Position = driveSize;
var footer = new VhdFooter();
footer.InitDefaults();
footer.OrigSize = ((ulong) driveSize).EndianSwap();
footer.CurSize = footer.OrigSize;
footer.UniqueId = Header.VDUID;
// don't need to calculate these
footer.DiskGeometryHeads = 0;
footer.DiskGeometrySectors = 0;
footer.DiskGeometryCylinders = 0;
footer.TimeStamp = 0;
footer.CalculateChecksum();
vhdFile.Writer.WriteStruct(footer);
}
if (DisableNativeFunctions)
return true;
// make sure NTFS compression is disabled on the vhd
int lpBytesReturned = 0;
// ReSharper disable InconsistentNaming
const int FSCTL_SET_COMPRESSION = 0x9C040;
short COMPRESSION_FORMAT_NONE = 0;
// ReSharper restore InconsistentNaming
using (FileStream f = File.Open(destFile, FileMode.Open, FileAccess.ReadWrite, FileShare.None))
{
#pragma warning disable 618
Natives.DeviceIoControl(f.Handle, FSCTL_SET_COMPRESSION,
#pragma warning restore 618
ref COMPRESSION_FORMAT_NONE, 2 /*sizeof(short)*/, IntPtr.Zero, 0,
ref lpBytesReturned, IntPtr.Zero);
}
return true;
}
public bool ConvertToVhd(string destFile)
{
if (IsEncrypted)
{
return(false);
}
// xvd -> vhd conversion just needs the FS data extracted with a vhd footer put at the end
// seems to work for older OS XVDs, newer XVCs use a 4k sector size though and windows VHD driver doesn't like it, not sure what new OS XVDs use
// todo: look into converting 4k sectors to 512
using (var vhdFile = new IO(destFile, FileMode.Create))
{
_io.Stream.Position = (long)DataOffset;
if (IsXvcFile) // if it's an XVC file then find the correct XVC data offset
{
bool foundFs = false;
foreach (var hdr in RegionHeaders)
{
if (hdr.Description == "FS-MD" || hdr.Id == 0x40000002)
{
foundFs = true;
_io.Stream.Position = (long)hdr.Offset;
break;
}
}
if (!foundFs)
{ // no FS-MD in the file, older XVCs seem to use the last region for it
_io.Stream.Position = (long)RegionHeaders[RegionHeaders.Count - 1].Offset;
}
}
vhdFile.Stream.Position = 0;
var driveSize = (long)Header.DriveSize;
while (_io.Stream.Length > _io.Stream.Position)
{
long toRead = 0x4000;
if (_io.Stream.Position + toRead > _io.Stream.Length)
{
toRead = _io.Stream.Length - _io.Stream.Position;
}
byte[] data = _io.Reader.ReadBytes((int)toRead);
vhdFile.Writer.Write(data);
}
vhdFile.Stream.Position = driveSize;
var footer = new VhdFooter();
footer.InitDefaults();
footer.OrigSize = ((ulong)driveSize).EndianSwap();
footer.CurSize = footer.OrigSize;
footer.UniqueId = Header.VDUID;
// don't need to calculate these
footer.DiskGeometryHeads = 0;
footer.DiskGeometrySectors = 0;
footer.DiskGeometryCylinders = 0;
footer.TimeStamp = 0;
footer.CalculateChecksum();
vhdFile.Writer.WriteStruct(footer);
}
if (DisableNativeFunctions)
{
return(true);
}
// make sure NTFS compression is disabled on the vhd
int lpBytesReturned = 0;
// ReSharper disable InconsistentNaming
const int FSCTL_SET_COMPRESSION = 0x9C040;
short COMPRESSION_FORMAT_NONE = 0;
// ReSharper restore InconsistentNaming
using (FileStream f = File.Open(destFile, FileMode.Open, FileAccess.ReadWrite, FileShare.None))
{
#pragma warning disable 618
Natives.DeviceIoControl(f.Handle, FSCTL_SET_COMPRESSION,
#pragma warning restore 618
ref COMPRESSION_FORMAT_NONE, 2 /*sizeof(short)*/, IntPtr.Zero, 0,
ref lpBytesReturned, IntPtr.Zero);
}
return(true);
}