public static StandardInformation InitializeNewFile(File file, FileAttributeFlags flags)
{
DateTime now = DateTime.UtcNow;
NtfsStream siStream = file.CreateStream(AttributeType.StandardInformation, null);
StandardInformation si = new StandardInformation();
si.CreationTime = now;
si.ModificationTime = now;
si.MftChangedTime = now;
si.LastAccessTime = now;
si.FileAttributes = flags;
siStream.SetContent(si);
return si;
}
public File InitializeNew(INtfsContext context, long firstBitmapCluster, ulong numBitmapClusters, long firstRecordsCluster, ulong numRecordsClusters)
{
BiosParameterBlock bpb = context.BiosParameterBlock;
FileRecord fileRec = new FileRecord(bpb.BytesPerSector, bpb.MftRecordSize, (uint)MftIndex);
fileRec.Flags = FileRecordFlags.InUse;
fileRec.SequenceNumber = 1;
_recordCache[MftIndex] = fileRec;
_self = new File(context, fileRec);
StandardInformation.InitializeNewFile(_self, FileAttributeFlags.Hidden | FileAttributeFlags.System);
NtfsStream recordsStream = _self.CreateStream(AttributeType.Data, null, firstRecordsCluster, numRecordsClusters, (uint)bpb.BytesPerCluster);
_recordStream = recordsStream.Open(FileAccess.ReadWrite);
Wipe(_recordStream);
NtfsStream bitmapStream = _self.CreateStream(AttributeType.Bitmap, null, firstBitmapCluster, numBitmapClusters, (uint)bpb.BytesPerCluster);
using (Stream s = bitmapStream.Open(FileAccess.ReadWrite))
{
Wipe(s);
s.SetLength(8);
_bitmap = new Bitmap(s, long.MaxValue);
}
_recordLength = context.BiosParameterBlock.MftRecordSize;
_bytesPerSector = context.BiosParameterBlock.BytesPerSector;
_bitmap.MarkPresentRange(0, 1);
// Write the MFT's own record to itself
byte[] buffer = new byte[_recordLength];
fileRec.ToBytes(buffer, 0);
_recordStream.Position = 0;
_recordStream.Write(buffer, 0, _recordLength);
_recordStream.Flush();
return(_self);
}
private Directory CreateSystemDirectory(long mftIndex)
{
DateTime now = DateTime.UtcNow;
BiosParameterBlock bpb = _context.BiosParameterBlock;
FileRecord fileRec = _context.Mft.AllocateRecord((uint)mftIndex, FileRecordFlags.None);
fileRec.Flags = FileRecordFlags.InUse | FileRecordFlags.IsDirectory;
fileRec.SequenceNumber = (ushort)mftIndex;
Directory dir = new Directory(_context, fileRec);
StandardInformation.InitializeNewFile(dir, FileAttributeFlags.Hidden | FileAttributeFlags.System);
dir.CreateIndex("$I30", AttributeType.FileName, AttributeCollationRule.Filename);
dir.UpdateRecordInMft();
return(dir);
}
private void VerifyDirectories()
{
foreach (FileRecord fr in _context.Mft.Records)
{
if (fr.BaseFile.Value != 0)
{
continue;
}
File f = new File(_context, fr);
foreach (NtfsStream stream in f.AllStreams)
{
if (stream.AttributeType == AttributeType.IndexRoot && stream.Name == "$I30")
{
IndexView <FileNameRecord, FileRecordReference> dir =
new IndexView <FileNameRecord, FileRecordReference>(f.GetIndex("$I30"));
foreach (KeyValuePair <FileNameRecord, FileRecordReference> entry in dir.Entries)
{
FileRecord refFile = _context.Mft.GetRecord(entry.Value);
// Make sure each referenced file actually exists...
if (refFile == null)
{
ReportError("Directory {0} references non-existent file {1}", f, entry.Key);
}
File referencedFile = new File(_context, refFile);
StandardInformation si = referencedFile.StandardInformation;
if (si.CreationTime != entry.Key.CreationTime ||
si.MftChangedTime != entry.Key.MftChangedTime ||
si.ModificationTime != entry.Key.ModificationTime)
{
ReportInfo("Directory entry {0} in {1} is out of date", entry.Key, f);
}
}
}
}
}
}
internal static File CreateNew(INtfsContext context, FileRecordFlags flags)
{
DateTime now = DateTime.UtcNow;
File newFile = context.AllocateFile(flags);
StandardInformation.InitializeNewFile(newFile, FileAttributeFlags.Archive | FileRecord.ConvertFlags(flags));
if (context.ObjectIds != null)
{
Guid newId = CreateNewGuid(context);
NtfsStream stream = newFile.CreateStream(AttributeType.ObjectId, null);
ObjectId objId = new ObjectId();
objId.Id = newId;
stream.SetContent(objId);
context.ObjectIds.Add(newId, newFile.MftReference, newId, Guid.Empty, Guid.Empty);
}
newFile.CreateAttribute(AttributeType.Data, AttributeFlags.None);
newFile.UpdateRecordInMft();
return(newFile);
}
public void UpdateRecordInMft()
{
if (MftRecordIsDirty)
{
if (NtfsTransaction.Current != null)
{
NtfsStream stream = GetStream(AttributeType.StandardInformation, null);
StandardInformation si = stream.GetContent <StandardInformation>();
si.MftChangedTime = NtfsTransaction.Current.Timestamp;
stream.SetContent(si);
}
bool fixesApplied = true;
while (fixesApplied)
{
fixesApplied = false;
for (int i = 0; i < _records.Count; ++i)
{
FileRecord record = _records[i];
bool fixedAttribute = true;
while (record.Size > _mft.RecordSize && fixedAttribute)
{
fixedAttribute = false;
if (!fixedAttribute && !record.IsMftRecord)
{
foreach (AttributeRecord attr in record.Attributes)
{
if (!attr.IsNonResident &&
!_context.AttributeDefinitions.MustBeResident(attr.AttributeType))
{
MakeAttributeNonResident(
new AttributeReference(record.Reference, attr.AttributeId),
(int)attr.DataLength);
fixedAttribute = true;
break;
}
}
}
if (!fixedAttribute)
{
foreach (AttributeRecord attr in record.Attributes)
{
if (attr.AttributeType == AttributeType.IndexRoot &&
ShrinkIndexRoot(attr.Name))
{
fixedAttribute = true;
break;
}
}
}
if (!fixedAttribute)
{
if (record.Attributes.Count == 1)
{
fixedAttribute = SplitAttribute(record);
}
else
{
if (_records.Count == 1)
{
CreateAttributeList();
}
fixedAttribute = ExpelAttribute(record);
}
}
fixesApplied |= fixedAttribute;
}
}
}
MftRecordIsDirty = false;
foreach (FileRecord record in _records)
{
_mft.WriteRecord(record);
}
}
}