public virtual FileRecord CreateFile(MftSegmentReference parentDirectory, string fileName, bool isDirectory)
{
// Worst case scenrario: the MFT might be full and the parent directory index requires multiple splits
if (NumberOfFreeClusters < 24)
{
throw new DiskFullException();
}
FileRecord parentDirectoryRecord = GetFileRecord(parentDirectory);
m_mftLock.AcquireWriterLock(Timeout.Infinite);
IndexData parentDirectoryIndex = new IndexData(this, parentDirectoryRecord, AttributeType.FileName);
if (parentDirectoryIndex.ContainsFileName(fileName))
{
m_mftLock.ReleaseWriterLock();
throw new AlreadyExistsException();
}
List <FileNameRecord> fileNameRecords = IndexHelper.GenerateFileNameRecords(parentDirectory, fileName, isDirectory, m_generateDosNames, parentDirectoryIndex);
uint transactionID = m_logClient.AllocateTransactionID();
FileRecord fileRecord = m_mft.CreateFile(fileNameRecords, transactionID);
// Update parent directory index
foreach (FileNameRecord fileNameRecord in fileNameRecords)
{
parentDirectoryIndex.AddEntry(fileRecord.BaseSegmentReference, fileNameRecord.GetBytes());
}
m_logClient.WriteForgetTransactionRecord(transactionID);
m_logClient.WriteRestartRecord(this.MajorVersion, true);
m_mftLock.ReleaseWriterLock();
return(fileRecord);
}
public virtual FileRecord CreateFile(MftSegmentReference parentDirectory, string fileName, bool isDirectory)
{
if (fileName.Length > FileNameRecord.MaxFileNameLength)
{
throw new InvalidNameException();
}
// Worst case scenrario: the MFT might be full and the parent directory index requires multiple splits.
// We assume IndexData.ExtendGranularity is bigger than or equal to the number of splits.
if (NumberOfFreeClusters < m_mft.NumberOfClustersRequiredToExtend + NumberOfClustersRequiredToExtendIndex)
{
throw new DiskFullException();
}
lock (m_mftLock)
{
FileRecord parentDirectoryRecord = GetFileRecord(parentDirectory);
IndexData parentDirectoryIndex = new IndexData(this, parentDirectoryRecord, AttributeType.FileName);
if (parentDirectoryIndex.ContainsFileName(fileName))
{
throw new AlreadyExistsException();
}
List <FileNameRecord> fileNameRecords = IndexHelper.GenerateFileNameRecords(parentDirectory, fileName, isDirectory, GenerateDosNames, parentDirectoryIndex);
uint transactionID = m_logClient.AllocateTransactionID();
FileRecord fileRecord = m_mft.CreateFile(fileNameRecords, transactionID);
// Update parent directory index
foreach (FileNameRecord fileNameRecord in fileNameRecords)
{
parentDirectoryIndex.AddEntry(fileRecord.BaseSegmentReference, fileNameRecord.GetBytes());
}
m_logClient.WriteForgetTransactionRecord(transactionID);
m_logClient.WriteRestartRecord(true);
return(fileRecord);
}
}