public MBTPartition(BlockDevice aBackend, uint aBlockStart, uint aBlockCount, string aName)
{
mBlockStart = aBlockStart;
mBlockCount = aBlockCount;
mBackend = aBackend;
mName = aName;
}
private static void DetectFilesystem(BlockDevice aDevice) {
#region Ext2
if (Ext2.BlockDeviceContainsExt2(aDevice)) {
aDevice.Used = true;
var xFS = new Ext2(aDevice);
mFilesystems.Add(xFS);
}
#endregion
}
private static List<Device> getPartitions(BlockDevice xBlockDev)
{
if (xBlockDev == null)
return default(List<Device>);
List<Device> partitionList = new List<Device>();
int xContentsIndex = 0x1BE;
//DebugUtil.SendMessage("MBT", "Found Device");
byte[] xBlockContents = new byte[xBlockDev.BlockSize];
xBlockDev.ReadBlock(0, xBlockContents);
// detecting whether MBT or not
//DebugUtil.SendNumber("MBT", "xBlockDev.BlockSize", xBlockDev.BlockSize, 32);
//DebugUtil.SendDoubleNumber("MBT", "Last bytes of block", xBlockContents[510], 8, xBlockContents[511], 8);
if (!(xBlockContents[xBlockDev.BlockSize - 2] == 0x55 && xBlockContents[xBlockDev.BlockSize - 1] == 0xAA))
{
//DebugUtil.SendMessage("MBT", "Does not contain MBR");
//Hardware.DebugUtil.SendATA_BlockReceived(255, 255, 0, xBlockContents);
return default(List<Device>);
}
for (byte j = 0; j < 4; j++)
{
//DebugUtil.SendNumber("MBT", "Partition Status", xBlockContents[xContentsIndex], 8);
if (!(xBlockContents[xContentsIndex] == 0x80 || xBlockContents[xContentsIndex] == 0))
{
xContentsIndex += 16;
continue;
}
xContentsIndex += 8;
uint xStart = BitConverter.ToUInt32(xBlockContents, xContentsIndex);
xContentsIndex += 4;
uint xLength = BitConverter.ToUInt32(xBlockContents, xContentsIndex);
xContentsIndex += 4;
if (xStart > 0 && xLength > 0)
{
//DebugUtil.SendDoubleNumber("MBT", "Entry Found. Start, Length in blocks", xStart, 32, xLength, 32);
xStart += 2;
Console.WriteLine("Add Partition to Device list");
partitionList.Add(new MBTPartition(xBlockDev, xStart, xLength, "Partition")); //Causes System Fault on the HTC Shift!
//DebugUtil.SendMessage("MBT", "FoundPartition");
}
}
return partitionList;
}
public MBRPartition(IBMPartitionInformation info, MBR mbr)
{
Mbr = mbr;
Start = info.StartLBA;
Length = info.LengthLBA;
Identifier = info.PartitionType;
blockDev = mbr.blockdevice;
}
public static bool BlockDeviceContainsExt2(BlockDevice aDevice) {
if (aDevice.BlockCount > 3)
{
byte[] xBuffer = new byte[aDevice.BlockSize];
// todo: implement better detection
aDevice.ReadBlock(2,
xBuffer);
bool xResult = (xBuffer[56] == 0x53 && xBuffer[57] == 0xEF);
return xResult;
}
return false;
}
public Ext2(BlockDevice aBackend) {
mBackend = aBackend;
Initialize();
}