public void UpdateFileRecordSegment(FileRecordSegment recordSegment)
{
long segmentNumber = recordSegment.MftSegmentNumber;
NTFSBootRecord bootRecord = m_volume.BootRecord;
long firstSectorIndex = segmentNumber * m_volume.SectorsPerFileRecordSegment;
byte[] recordSegmentBytes = recordSegment.GetBytes(bootRecord.FileRecordSegmentLength, m_volume.BytesPerCluster, m_volume.MinorVersion);
m_mftRecord.NonResidentDataRecord.WriteDataSectors(m_volume, firstSectorIndex, recordSegmentBytes);
}
public FileRecord CreateFile(List <FileNameRecord> fileNameRecords, uint transactionID)
{
if (fileNameRecords.Count == 0)
{
throw new ArgumentException();
}
bool isDirectory = fileNameRecords[0].IsDirectory;
MftSegmentReference segmentReference = AllocateFileRecordSegment(transactionID);
FileRecordSegment fileRecordSegment = new FileRecordSegment(segmentReference.SegmentNumber, segmentReference.SequenceNumber);
// UpdateFileRecord() expects the base segment to be present on disk
byte[] redoData = fileRecordSegment.GetBytes(m_volume.BytesPerFileRecordSegment, m_volume.MinorVersion, false);
ulong streamOffset = (ulong)(fileRecordSegment.SegmentNumber * m_volume.BytesPerFileRecordSegment);
m_volume.LogClient.WriteLogRecord(m_mftRecord.BaseSegmentReference, m_mftRecord.DataRecord, streamOffset, NTFSLogOperation.InitializeFileRecordSegment, redoData, NTFSLogOperation.DeallocateFileRecordSegment, new byte[0], transactionID);
UpdateFileRecordSegment(fileRecordSegment);
fileRecordSegment.ReferenceCount = (ushort)fileNameRecords.Count; // Each FileNameRecord is about to be indexed
fileRecordSegment.IsInUse = true;
fileRecordSegment.IsDirectory = isDirectory;
FileRecord fileRecord = new FileRecord(fileRecordSegment);
StandardInformationRecord standardInformation = (StandardInformationRecord)fileRecord.CreateAttributeRecord(AttributeType.StandardInformation, String.Empty);
standardInformation.CreationTime = fileNameRecords[0].CreationTime;
standardInformation.ModificationTime = fileNameRecords[0].ModificationTime;
standardInformation.MftModificationTime = fileNameRecords[0].MftModificationTime;
standardInformation.LastAccessTime = fileNameRecords[0].LastAccessTime;
standardInformation.FileAttributes = 0;
foreach (FileNameRecord fileNameRecord in fileNameRecords)
{
FileNameAttributeRecord fileNameAttribute = (FileNameAttributeRecord)fileRecord.CreateAttributeRecord(AttributeType.FileName, String.Empty);
fileNameAttribute.IsIndexed = true;
fileNameAttribute.Record = fileNameRecord;
}
if (isDirectory)
{
string indexName = IndexHelper.GetIndexName(AttributeType.FileName);
IndexRootRecord indexRoot = (IndexRootRecord)fileRecord.CreateAttributeRecord(AttributeType.IndexRoot, indexName);
IndexHelper.InitializeIndexRoot(indexRoot, AttributeType.FileName, m_volume.BytesPerIndexRecord, m_volume.BytesPerCluster);
}
else
{
fileRecord.CreateAttributeRecord(AttributeType.Data, String.Empty);
}
UpdateFileRecord(fileRecord, transactionID);
return(fileRecord);
}
public void UpdateFileRecordSegment(FileRecordSegment recordSegment)
{
long segmentNumber = recordSegment.SegmentNumber;
long firstSectorIndex = segmentNumber * m_volume.SectorsPerFileRecordSegment;
if (segmentNumber >= FirstReservedSegmentNumber)
{
recordSegment.UpdateSequenceNumber++;
}
recordSegment.LogFileSequenceNumber = 0;
byte[] recordSegmentBytes = recordSegment.GetBytes(m_volume.BytesPerFileRecordSegment, m_volume.MinorVersion);
m_mftFile.Data.WriteSectors(firstSectorIndex, recordSegmentBytes);
}
private static void WriteFileRecordSegment(byte[] mftData, FileRecordSegment segment, int bytesPerFileRecordSegment, byte minorNTFSVersion)
{
byte[] segmentBytes = segment.GetBytes(bytesPerFileRecordSegment, minorNTFSVersion, true);
ByteWriter.WriteBytes(mftData, bytesPerFileRecordSegment * (int)segment.SegmentNumber, segmentBytes);
}
public void UpdateFileRecord(FileRecord fileRecord, uint transactionID)
{
Dictionary <MftSegmentReference, byte[]> undoDictionary = new Dictionary <MftSegmentReference, byte[]>();
foreach (FileRecordSegment segment in fileRecord.Segments)
{
byte[] segmentBytes = segment.GetBytes(m_volume.BytesPerFileRecordSegment, m_volume.MinorVersion, false);
undoDictionary.Add(segment.SegmentReference, segmentBytes);
}
AttributeRecord oldAttributeList = fileRecord.BaseSegment.GetImmediateAttributeRecord(AttributeType.AttributeList, String.Empty);
fileRecord.UpdateSegments(m_volume.BytesPerFileRecordSegment, m_volume.MinorVersion);
FileRecordSegment baseSegment = fileRecord.BaseSegment;
for (int segmentIndex = 1; segmentIndex < fileRecord.Segments.Count; segmentIndex++)
{
FileRecordSegment segment = fileRecord.Segments[segmentIndex];
if (segment.SegmentReference == MftSegmentReference.NullReference)
{
// New segment, we must allocate space for it
MftSegmentReference segmentReference;
if (baseSegment.SegmentNumber == MasterFileTable.MasterFileTableSegmentNumber)
{
segmentReference = AllocateReservedFileRecordSegment(transactionID);
}
else
{
segmentReference = AllocateFileRecordSegment(transactionID);
}
FileRecordSegment newSegment = new FileRecordSegment(segmentReference.SegmentNumber, segmentReference.SequenceNumber, baseSegment.SegmentReference);
newSegment.IsInUse = true;
newSegment.IsDirectory = fileRecord.IsDirectory;
newSegment.NextAttributeInstance = segment.NextAttributeInstance;
newSegment.ImmediateAttributes.AddRange(segment.ImmediateAttributes);
fileRecord.Segments[segmentIndex] = newSegment;
}
else if (segment.ImmediateAttributes.Count == 0)
{
byte[] undoData = undoDictionary[segment.SegmentReference];
ulong streamOffset = (ulong)(segment.SegmentNumber * m_volume.BytesPerFileRecordSegment);
m_volume.LogClient.WriteLogRecord(m_mftRecord.BaseSegmentReference, m_mftRecord.DataRecord, streamOffset, m_volume.BytesPerFileRecordSegment, NTFSLogOperation.DeallocateFileRecordSegment, new byte[0], NTFSLogOperation.InitializeFileRecordSegment, undoData, transactionID);
DeallocateFileRecordSegment(segment, transactionID);
fileRecord.Segments.RemoveAt(segmentIndex);
segmentIndex--;
}
}
for (int segmentIndex = 1; segmentIndex < fileRecord.Segments.Count; segmentIndex++)
{
FileRecordSegment segment = fileRecord.Segments[segmentIndex];
byte[] undoData;
byte[] redoData = segment.GetBytes(m_volume.BytesPerFileRecordSegment, m_volume.MinorVersion, false);
ulong streamOffset = (ulong)(segment.SegmentNumber * m_volume.BytesPerFileRecordSegment);
if (undoDictionary.TryGetValue(segment.SegmentReference, out undoData))
{
m_volume.LogClient.WriteLogRecord(m_mftRecord.BaseSegmentReference, m_mftRecord.DataRecord, streamOffset, m_volume.BytesPerFileRecordSegment, NTFSLogOperation.InitializeFileRecordSegment, redoData, NTFSLogOperation.InitializeFileRecordSegment, undoData, transactionID);
}
else
{
// New segment
m_volume.LogClient.WriteLogRecord(m_mftRecord.BaseSegmentReference, m_mftRecord.DataRecord, streamOffset, m_volume.BytesPerFileRecordSegment, NTFSLogOperation.InitializeFileRecordSegment, redoData, NTFSLogOperation.DeallocateFileRecordSegment, new byte[0], transactionID);
}
UpdateFileRecordSegment(segment);
}
if (oldAttributeList is NonResidentAttributeRecord)
{
new NonResidentAttributeData(m_volume, null, (NonResidentAttributeRecord)oldAttributeList).Truncate(0);
}
bool needsAttributeList = (fileRecord.Segments.Count > 1);
if (needsAttributeList)
{
List <AttributeListEntry> entries = FileRecordHelper.BuildAttributeList(fileRecord.Segments, m_volume.BytesPerFileRecordSegment, m_volume.MinorVersion);
int dataLength = AttributeList.GetLength(entries);
int attributeListRecordLength = ResidentAttributeRecord.GetRecordLength(0, dataLength);
int numberOfBytesFreeInBaseSegment = baseSegment.GetNumberOfBytesFree(m_volume.BytesPerFileRecordSegment, m_volume.MinorVersion);
bool isResident = (attributeListRecordLength <= numberOfBytesFreeInBaseSegment);
AttributeRecord attributeListRecord = baseSegment.CreateAttributeListRecord(isResident);
AttributeList attributeList = new AttributeList(m_volume, attributeListRecord);
attributeList.WriteEntries(entries);
}
byte[] baseRecordUndoData = undoDictionary[baseSegment.SegmentReference];
byte[] baseRecordRedoData = baseSegment.GetBytes(m_volume.BytesPerFileRecordSegment, m_volume.MinorVersion, false);
ulong baseRecordStreamOffset = (ulong)(baseSegment.SegmentNumber * m_volume.BytesPerFileRecordSegment);
m_volume.LogClient.WriteLogRecord(m_mftRecord.BaseSegmentReference, m_mftRecord.DataRecord, baseRecordStreamOffset, m_volume.BytesPerFileRecordSegment, NTFSLogOperation.InitializeFileRecordSegment, baseRecordRedoData, NTFSLogOperation.InitializeFileRecordSegment, baseRecordUndoData, transactionID);
UpdateFileRecordSegment(baseSegment);
}
