public Index(File file, string name, BiosParameterBlock bpb, UpperCase upCase)
{
_file = file;
_name = name;
_bpb = bpb;
_isFileIndex = name == "$I30";
_blockCache = new ObjectCache<long, IndexBlock>();
_root = _file.GetStream(AttributeType.IndexRoot, _name).GetContent<IndexRoot>();
_comparer = _root.GetCollator(upCase);
using (Stream s = _file.OpenStream(AttributeType.IndexRoot, _name, FileAccess.Read))
{
byte[] buffer = Utilities.ReadFully(s, (int)s.Length);
_rootNode = new IndexNode(WriteRootNodeToDisk, 0, this, true, buffer, IndexRoot.HeaderOffset);
// Give the attribute some room to breathe, so long as it doesn't squeeze others out
// BROKEN, BROKEN, BROKEN - how to figure this out? Query at the point of adding entries to the root node?
_rootNode.TotalSpaceAvailable += _file.MftRecordFreeSpace(AttributeType.IndexRoot, _name) - 100;
}
if (_file.StreamExists(AttributeType.IndexAllocation, _name))
{
_indexStream = _file.OpenStream(AttributeType.IndexAllocation, _name, FileAccess.ReadWrite);
}
if (_file.StreamExists(AttributeType.Bitmap, _name))
{
_indexBitmap = new Bitmap(_file.OpenStream(AttributeType.Bitmap, _name, FileAccess.ReadWrite), long.MaxValue);
}
}
public IndexBlock(Index index, bool isRoot, IndexEntry parentEntry, BiosParameterBlock bpb)
: base("INDX", bpb.BytesPerSector)
{
_index = index;
_isRoot = isRoot;
Stream stream = index.AllocationStream;
_streamPosition = parentEntry.ChildrenVirtualCluster * bpb.BytesPerSector * bpb.SectorsPerCluster;
stream.Position = _streamPosition;
byte[] buffer = Utilities.ReadFully(stream, (int)index.IndexBufferSize);
FromBytes(buffer, 0);
}
private IndexBlock(Index index, bool isRoot, long vcn, BiosParameterBlock bpb)
: base("INDX", bpb.BytesPerSector, bpb.IndexBufferSize)
{
_index = index;
_isRoot = isRoot;
_indexBlockVcn = (ulong)vcn;
_streamPosition = vcn * bpb.BytesPerSector * bpb.SectorsPerCluster;
_node = new IndexNode(WriteToDisk, UpdateSequenceSize, _index, isRoot, (uint)bpb.IndexBufferSize - FieldSize);
WriteToDisk();
}
private Index(AttributeType attrType, AttributeCollationRule collationRule, File file, string name, BiosParameterBlock bpb, UpperCase upCase)
{
_file = file;
_name = name;
_bpb = bpb;
_isFileIndex = name == "$I30";
_blockCache = new ObjectCache<long, IndexBlock>();
_file.CreateStream(AttributeType.IndexRoot, _name);
_root = new IndexRoot()
{
AttributeType = (uint)attrType,
CollationRule = collationRule,
IndexAllocationSize = (uint)bpb.IndexBufferSize,
RawClustersPerIndexRecord = bpb.RawIndexBufferSize
};
_comparer = _root.GetCollator(upCase);
_rootNode = new IndexNode(WriteRootNodeToDisk, 0, this, true, 32);
}
internal static BiosParameterBlock Initialized(Geometry diskGeometry, int clusterSize, uint partitionStartLba, long partitionSizeLba, int mftRecordSize, int indexBufferSize)
{
BiosParameterBlock bpb = new BiosParameterBlock();
bpb.OemId = "NTFS ";
bpb.BytesPerSector = Sizes.Sector;
bpb.SectorsPerCluster = (byte)(clusterSize / bpb.BytesPerSector);
bpb.ReservedSectors = 0;
bpb.NumFats = 0;
bpb.FatRootEntriesCount = 0;
bpb.TotalSectors16 = 0;
bpb.Media = 0xF8;
bpb.FatSize16 = 0;
bpb.SectorsPerTrack = (ushort)diskGeometry.SectorsPerTrack;
bpb.NumHeads = (ushort)diskGeometry.HeadsPerCylinder;
bpb.HiddenSectors = partitionStartLba;
bpb.TotalSectors32 = 0;
bpb.BiosDriveNumber = 0x80;
bpb.ChkDskFlags = 0;
bpb.SignatureByte = 0x80;
bpb.PaddingByte = 0;
bpb.TotalSectors64 = partitionSizeLba - 1;
bpb.RawMftRecordSize = bpb.CodeRecordSize(mftRecordSize);
bpb.RawIndexBufferSize = bpb.CodeRecordSize(indexBufferSize);
bpb.VolumeSerialNumber = GenSerialNumber();
return bpb;
}
internal static BiosParameterBlock FromBytes(byte[] bytes, int offset)
{
BiosParameterBlock bpb = new BiosParameterBlock();
bpb.OemId = Utilities.BytesToString(bytes, offset + 0x03, 8);
bpb.BytesPerSector = Utilities.ToUInt16LittleEndian(bytes, offset + 0x0B);
bpb.SectorsPerCluster = bytes[offset + 0x0D];
bpb.ReservedSectors = Utilities.ToUInt16LittleEndian(bytes, offset + 0x0E);
bpb.NumFats = bytes[offset + 0x10];
bpb.FatRootEntriesCount = Utilities.ToUInt16LittleEndian(bytes, offset + 0x11);
bpb.TotalSectors16 = Utilities.ToUInt16LittleEndian(bytes, offset + 0x13);
bpb.Media = bytes[offset + 0x15];
bpb.FatSize16 = Utilities.ToUInt16LittleEndian(bytes, offset + 0x16);
bpb.SectorsPerTrack = Utilities.ToUInt16LittleEndian(bytes, offset + 0x18);
bpb.NumHeads = Utilities.ToUInt16LittleEndian(bytes, offset + 0x1A);
bpb.HiddenSectors = Utilities.ToUInt32LittleEndian(bytes, offset + 0x1C);
bpb.TotalSectors32 = Utilities.ToUInt32LittleEndian(bytes, offset + 0x20);
bpb.BiosDriveNumber = bytes[offset + 0x24];
bpb.ChkDskFlags = bytes[offset + 0x25];
bpb.SignatureByte = bytes[offset + 0x26];
bpb.PaddingByte = bytes[offset + 0x27];
bpb.TotalSectors64 = Utilities.ToInt64LittleEndian(bytes, offset + 0x28);
bpb.MftCluster = Utilities.ToInt64LittleEndian(bytes, offset + 0x30);
bpb.MftMirrorCluster = Utilities.ToInt64LittleEndian(bytes, offset + 0x38);
bpb.RawMftRecordSize = bytes[offset + 0x40];
bpb.RawIndexBufferSize = bytes[offset + 0x44];
bpb.VolumeSerialNumber = Utilities.ToUInt64LittleEndian(bytes, offset + 0x48);
return bpb;
}
internal static IndexBlock Initialize(Index index, bool isRoot, IndexEntry parentEntry, BiosParameterBlock bpb)
{
return new IndexBlock(index, isRoot, parentEntry.ChildrenVirtualCluster, bpb);
}