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[NTFS] - Add the most basic support for file creation. Expand diagnostic output, especially in NtfsDumpIndexRootAttribute(). Replace an ExFreePool() with ExFreePoolWithTag().

Browse source 
AddFileName() - Add a parameter to receive the Mft index of the parent directory. Fix so the name of the file will be stored in the attribute, not the name of the directory.
NtfsCreateFile() - Open a file that was successfully created, instead of assuming failure.
NtfsCreateFileRecord() - Add the filename attribute of the created file to the parent directory's index.
+NtfsAddFilenameToDirectory() - Adds a $FILE_NAME attribute to a given directory index. Presently, a file can be created in an empty directory only.
AddNewMftEntry() - Add a parameter to receive the mft index where the new entry was stored.

svn path=/branches/GSoC_2016/NTFS/; revision=74970
This commit is contained in:
Trevor Thompson 2017-06-09 03:14:30 +00:00 • committed by Thomas Faber
parent 4ca9151300
commit e0048b1362
5 changed files with 388 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

94
drivers/filesystems/ntfs/attrib.c
View file

@ -112,6 +112,9 @@ AddData(PFILE_RECORD_HEADER FileRecord,
* Pointer to the FILE_OBJECT which represents the new name.
* This parameter is used to determine the filename and parent directory.
*
* @param ParentMftIndex
* Pointer to a ULONGLONG which will receive the index of the parent directory.
*
* @return
* STATUS_SUCCESS on success. STATUS_NOT_IMPLEMENTED if target address isn't at the end
* of the given file record.
@ -128,16 +131,18 @@ NTSTATUS
AddFileName(PFILE_RECORD_HEADER FileRecord,
PNTFS_ATTR_RECORD AttributeAddress,
PDEVICE_EXTENSION DeviceExt,
PFILE_OBJECT FileObject)
PFILE_OBJECT FileObject,
PULONGLONG ParentMftIndex)
{
ULONG ResidentHeaderLength = FIELD_OFFSET(NTFS_ATTR_RECORD, Resident.Reserved) + sizeof(UCHAR);
PFILENAME_ATTRIBUTE FileNameAttribute;
LARGE_INTEGER SystemTime;
ULONG FileRecordEnd = AttributeAddress->Length;
ULONGLONG CurrentMFTIndex = NTFS_FILE_ROOT;
UNICODE_STRING Current, Remaining;
UNICODE_STRING Current, Remaining, FilenameNoPath;
NTSTATUS Status = STATUS_SUCCESS;
ULONG FirstEntry = 0;
WCHAR Buffer[MAX_PATH];
if (AttributeAddress->Type != AttributeEnd)
{
@ -162,21 +167,30 @@ AddFileName(PFILE_RECORD_HEADER FileRecord,
// we need to extract the filename from the path
DPRINT1("Pathname: %wZ\n", &FileObject->FileName);
RtlZeroMemory(&FilenameNoPath, sizeof(UNICODE_STRING));
FilenameNoPath.Buffer = Buffer;
FilenameNoPath.MaximumLength = MAX_PATH;
FsRtlDissectName(FileObject->FileName, &Current, &Remaining);
while (Current.Length != 0)
{
DPRINT1("Current: %wZ\n", &Current);
if(Remaining.Length != 0)
RtlCopyUnicodeString(&FilenameNoPath, &Remaining);
Status = NtfsFindMftRecord(DeviceExt, CurrentMFTIndex, &Current, &FirstEntry, FALSE, &CurrentMFTIndex);
if (!NT_SUCCESS(Status))
break;
if (Remaining.Length == 0 )
{
if(Current.Length != 0)
RtlCopyUnicodeString(&FilenameNoPath, &Current);
break;
}
if (Remaining.Length == 0)
break;
FsRtlDissectName(Current, &Current, &Remaining);
}
@ -184,6 +198,9 @@ AddFileName(PFILE_RECORD_HEADER FileRecord,
// set reference to parent directory
FileNameAttribute->DirectoryFileReferenceNumber = CurrentMFTIndex;
*ParentMftIndex = CurrentMFTIndex;
DPRINT1("SequenceNumber: 0x%02x\n", FileRecord->SequenceNumber);
// The highest 2 bytes should be the sequence number, unless the parent happens to be root
if (CurrentMFTIndex == NTFS_FILE_ROOT)
@ -191,19 +208,19 @@ AddFileName(PFILE_RECORD_HEADER FileRecord,
else
FileNameAttribute->DirectoryFileReferenceNumber |= (ULONGLONG)FileRecord->SequenceNumber << 48;
DPRINT1("FileNameAttribute->DirectoryFileReferenceNumber: 0x%I64x\n", FileNameAttribute->DirectoryFileReferenceNumber);
DPRINT1("FileNameAttribute->DirectoryFileReferenceNumber: 0x%016I64x\n", FileNameAttribute->DirectoryFileReferenceNumber);
FileNameAttribute->NameLength = Current.Length / 2;
FileNameAttribute->NameLength = FilenameNoPath.Length / 2;
// TODO: Get proper nametype, add DOS links as needed
FileNameAttribute->NameType = NTFS_FILE_NAME_WIN32_AND_DOS;
RtlCopyMemory(FileNameAttribute->Name, Current.Buffer, Current.Length);
RtlCopyMemory(FileNameAttribute->Name, FilenameNoPath.Buffer, FilenameNoPath.Length);
FileRecord->LinkCount++;
AttributeAddress->Length = ResidentHeaderLength +
FIELD_OFFSET(FILENAME_ATTRIBUTE, Name) + Current.Length;
FIELD_OFFSET(FILENAME_ATTRIBUTE, Name) + FilenameNoPath.Length;
AttributeAddress->Length = ALIGN_UP_BY(AttributeAddress->Length, 8);
AttributeAddress->Resident.ValueLength = FIELD_OFFSET(FILENAME_ATTRIBUTE, Name) + Current.Length;
AttributeAddress->Resident.ValueLength = FIELD_OFFSET(FILENAME_ATTRIBUTE, Name) + FilenameNoPath.Length;
AttributeAddress->Resident.ValueOffset = ResidentHeaderLength;
AttributeAddress->Resident.Flags = 1; // indexed
@ -1054,6 +1071,7 @@ NtfsDumpFileNameAttribute(PNTFS_ATTR_RECORD Attribute)
DbgPrint(" (%x) '%.*S' ", FileNameAttr->NameType, FileNameAttr->NameLength, FileNameAttr->Name);
DbgPrint(" '%x' \n", FileNameAttr->FileAttributes);
DbgPrint(" AllocatedSize: %I64u\nDataSize: %I64u\n", FileNameAttr->AllocatedSize, FileNameAttr->DataSize);
DbgPrint(" File reference: 0x%016I64x\n", FileNameAttr->DirectoryFileReferenceNumber);
}
@ -1110,23 +1128,73 @@ VOID
NtfsDumpIndexRootAttribute(PNTFS_ATTR_RECORD Attribute)
{
PINDEX_ROOT_ATTRIBUTE IndexRootAttr;
ULONG currentOffset;
ULONG currentNode;
IndexRootAttr = (PINDEX_ROOT_ATTRIBUTE)((ULONG_PTR)Attribute + Attribute->Resident.ValueOffset);
if (IndexRootAttr->AttributeType == AttributeFileName)
ASSERT(IndexRootAttr->CollationRule == COLLATION_FILE_NAME);
DbgPrint(" $INDEX_ROOT (%uB, %u) ", IndexRootAttr->SizeOfEntry, IndexRootAttr->ClustersPerIndexRecord);
DbgPrint(" $INDEX_ROOT (%u bytes per index record, %u clusters) ", IndexRootAttr->SizeOfEntry, IndexRootAttr->ClustersPerIndexRecord);
if (IndexRootAttr->Header.Flags == INDEX_ROOT_SMALL)
{
DbgPrint(" (small) ");
DbgPrint(" (small)\n");
}
else
{
ASSERT(IndexRootAttr->Header.Flags == INDEX_ROOT_LARGE);
DbgPrint(" (large) ");
DbgPrint(" (large)\n");
}
DbgPrint(" Offset to first index: 0x%lx\n Total size of index entries: 0x%lx\n Allocated size of node: 0x%lx\n",
IndexRootAttr->Header.FirstEntryOffset,
IndexRootAttr->Header.TotalSizeOfEntries,
IndexRootAttr->Header.AllocatedSize);
currentOffset = IndexRootAttr->Header.FirstEntryOffset;
currentNode = 0;
// print details of every node in the index
while (currentOffset < IndexRootAttr->Header.TotalSizeOfEntries)
{
PINDEX_ENTRY_ATTRIBUTE currentIndexExtry = (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)IndexRootAttr + 0x10 + currentOffset);
DbgPrint(" Index Node Entry %u", currentNode++);
if (currentIndexExtry->Flags & NTFS_INDEX_ENTRY_NODE)
DbgPrint(" (Branch)");
else
DbgPrint(" (Leaf)");
if((currentIndexExtry->Flags & NTFS_INDEX_ENTRY_END))
{
DbgPrint(" (Dummy Key)");
}
DbgPrint("\n File Reference: 0x%016I64x\n", currentIndexExtry->Data.Directory.IndexedFile);
DbgPrint(" Index Entry Length: 0x%x\n", currentIndexExtry->Length);
DbgPrint(" Index Key Length: 0x%x\n", currentIndexExtry->KeyLength);
// if this isn't the final (dummy) node, print info about the key (Filename attribute)
if (!(currentIndexExtry->Flags & NTFS_INDEX_ENTRY_END))
{
UNICODE_STRING Name;
DbgPrint(" Parent File Reference: 0x%016I64x\n", currentIndexExtry->FileName.DirectoryFileReferenceNumber);
DbgPrint(" $FILENAME indexed: ");
Name.Length = currentIndexExtry->FileName.NameLength * sizeof(WCHAR);
Name.MaximumLength = Name.Length;
Name.Buffer = currentIndexExtry->FileName.Name;
DbgPrint("'%wZ'\n", &Name);
}
// if this node has a sub-node beneath it
if (currentIndexExtry->Flags & NTFS_INDEX_ENTRY_NODE)
{
// Print the VCN of the sub-node
PULONGLONG SubNodeVCN = (PULONGLONG)((ULONG_PTR)currentIndexExtry + currentIndexExtry->Length - 8);
DbgPrint(" VCN of sub-node: 0x%llx\n", *SubNodeVCN);
}
currentOffset += currentIndexExtry->Length;
ASSERT(currentIndexExtry->Length);
}
}

44
drivers/filesystems/ntfs/create.c
View file

@ -523,7 +523,7 @@ NtfsCreateFile(PDEVICE_OBJECT DeviceObject,
DoneOverwriting:
if (fileRecord)
ExFreePool(fileRecord);
ExFreePoolWithTag(fileRecord, TAG_NTFS);
if (dataContext)
ReleaseAttributeContext(dataContext);
@ -562,13 +562,14 @@ NtfsCreateFile(PDEVICE_OBJECT DeviceObject,
// Create the file record on disk
Status = NtfsCreateFileRecord(DeviceExt, FileObject);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Couldn't create file record!\n");
return Status;
}
// Update the parent directory index
// Still TODO
// Call NtfsOpenFile()
return STATUS_CANNOT_MAKE;
// Now we should be able to open the file
return NtfsCreateFile(DeviceObject, Irp);
}
}
@ -624,7 +625,8 @@ NtfsCreate(PNTFS_IRP_CONTEXT IrpContext)
* @name NtfsCreateFileRecord()
* @implemented
*
* Creates a file record and saves it to the MFT.
* Creates a file record and saves it to the MFT. Adds the filename attribute of the
* created file to the parent directory's index.
*
* @param DeviceExt
* Points to the target disk's DEVICE_EXTENSION
@ -643,6 +645,9 @@ NtfsCreateFileRecord(PDEVICE_EXTENSION DeviceExt,
NTSTATUS Status = STATUS_SUCCESS;
PFILE_RECORD_HEADER FileRecord;
PNTFS_ATTR_RECORD NextAttribute;
PFILENAME_ATTRIBUTE FilenameAttribute;
ULONGLONG ParentMftIndex;
ULONGLONG FileMftIndex;
// allocate memory for file record
FileRecord = ExAllocatePoolWithTag(NonPagedPool,
@ -686,7 +691,10 @@ NtfsCreateFileRecord(PDEVICE_EXTENSION DeviceExt,
NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)NextAttribute + (ULONG_PTR)NextAttribute->Length);
// Add the $FILE_NAME attribute
AddFileName(FileRecord, NextAttribute, DeviceExt, FileObject);
AddFileName(FileRecord, NextAttribute, DeviceExt, FileObject, &ParentMftIndex);
// save a pointer to the filename attribute
FilenameAttribute = (PFILENAME_ATTRIBUTE)((ULONG_PTR)NextAttribute + NextAttribute->Resident.ValueOffset);
// advance NextAttribute pointer to the next attribute
NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)NextAttribute + (ULONG_PTR)NextAttribute->Length);
@ -698,7 +706,23 @@ NtfsCreateFileRecord(PDEVICE_EXTENSION DeviceExt,
NtfsDumpFileRecord(DeviceExt, FileRecord);
// Now that we've built the file record in memory, we need to store it in the MFT.
Status = AddNewMftEntry(FileRecord, DeviceExt);
Status = AddNewMftEntry(FileRecord, DeviceExt, &FileMftIndex);
if (NT_SUCCESS(Status))
{
// The highest 2 bytes should be the sequence number, unless the parent happens to be root
if (FileMftIndex == NTFS_FILE_ROOT)
FileMftIndex = FileMftIndex + ((ULONGLONG)NTFS_FILE_ROOT << 48);
else
FileMftIndex = FileMftIndex + ((ULONGLONG)FileRecord->SequenceNumber << 48);
DPRINT1("New File Reference: 0x%016I64x\n", FileMftIndex);
// Add the filename attribute to the filename-index of the parent directory
Status = NtfsAddFilenameToDirectory(DeviceExt,
ParentMftIndex,
FileMftIndex,
FilenameAttribute);
}
ExFreePoolWithTag(FileRecord, TAG_NTFS);

250
drivers/filesystems/ntfs/dirctl.c
View file

@ -34,6 +34,256 @@
/* FUNCTIONS ****************************************************************/
/**
* @name NtfsAddFilenameToDirectory
* @implemented
*
* Adds a $FILE_NAME attribute to a given directory index.
*
* @param DeviceExt
* Points to the target disk's DEVICE_EXTENSION.
*
* @param DirectoryMftIndex
* Mft index of the parent directory which will receive the file.
*
* @param FileReferenceNumber
* File reference of the file to be added to the directory. This is a combination of the
* Mft index and sequence number.
*
* @param FilenameAttribute
* Pointer to the FILENAME_ATTRIBUTE of the file being added to the directory.
*
* @return
* STATUS_SUCCESS on success.
* STATUS_INSUFFICIENT_RESOURCES if an allocation fails.
* STATUS_NOT_IMPLEMENTED if target address isn't at the end of the given file record.
*
* @remarks
* WIP - Can only support an empty directory.
* One FILENAME_ATTRIBUTE is added to the directory's index for each link to that file. So, each
* file which contains one FILENAME_ATTRIBUTE for a long name and another for the 8.3 name, will
* get both attributes added to its parent directory.
*/
NTSTATUS
NtfsAddFilenameToDirectory(PDEVICE_EXTENSION DeviceExt,
ULONGLONG DirectoryMftIndex,
ULONGLONG FileReferenceNumber,
PFILENAME_ATTRIBUTE FilenameAttribute)
{
NTSTATUS Status = STATUS_SUCCESS;
PFILE_RECORD_HEADER ParentFileRecord;
PNTFS_ATTR_CONTEXT DirectoryContext;
PINDEX_ROOT_ATTRIBUTE I30IndexRoot;
ULONG IndexRootOffset;
ULONGLONG I30IndexRootLength;
PINDEX_ENTRY_ATTRIBUTE IndexNodeEntry;
ULONG LengthWritten;
PNTFS_ATTR_RECORD DestinationAttribute;
PINDEX_ROOT_ATTRIBUTE NewIndexRoot;
ULONG AttributeLength;
PNTFS_ATTR_RECORD NextAttribute;
// Allocate memory for the parent directory
ParentFileRecord = ExAllocatePoolWithTag(NonPagedPool,
DeviceExt->NtfsInfo.BytesPerFileRecord,
TAG_NTFS);
if (!ParentFileRecord)
{
DPRINT1("ERROR: Couldn't allocate memory for file record!\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
// Open the parent directory
Status = ReadFileRecord(DeviceExt, DirectoryMftIndex, ParentFileRecord);
if (!NT_SUCCESS(Status))
{
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
DPRINT1("ERROR: Couldn't read parent directory with index %I64u\n",
DirectoryMftIndex);
return Status;
}
DPRINT1("Dumping old parent file record:\n");
NtfsDumpFileRecord(DeviceExt, ParentFileRecord);
// Find the index root attribute for the directory
Status = FindAttribute(DeviceExt,
ParentFileRecord,
AttributeIndexRoot,
L"$I30",
4,
&DirectoryContext,
&IndexRootOffset);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Couldn't find $I30 $INDEX_ROOT attribute for parent directory with MFT #: %I64u!\n",
DirectoryMftIndex);
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
return Status;
}
I30IndexRootLength = AttributeDataLength(&DirectoryContext->Record);
// Allocate memory for the index root data
I30IndexRoot = (PINDEX_ROOT_ATTRIBUTE)ExAllocatePoolWithTag(NonPagedPool, I30IndexRootLength, TAG_NTFS);
if (!I30IndexRoot)
{
DPRINT1("ERROR: Couldn't allocate memory for index root attribute!\n");
ReleaseAttributeContext(DirectoryContext);
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
}
// Read the Index Root
Status = ReadAttribute(DeviceExt, DirectoryContext, 0, (PCHAR)I30IndexRoot, I30IndexRootLength);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Couln't read index root attribute for Mft index #%I64u\n", DirectoryMftIndex);
ReleaseAttributeContext(DirectoryContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
return Status;
}
// Make sure it's empty (temporarily)
IndexNodeEntry = (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)I30IndexRoot + I30IndexRoot->Header.FirstEntryOffset + 0x10);
if (IndexNodeEntry->Data.Directory.IndexedFile != 0 || IndexNodeEntry->Flags != 2)
{
DPRINT1("FIXME: File-creation is only supported in empty directories right now! Be patient! :)\n");
ReleaseAttributeContext(DirectoryContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
return STATUS_NOT_IMPLEMENTED;
}
// Now we need to setup a new index root attribute to replace the old one
NewIndexRoot = ExAllocatePoolWithTag(NonPagedPool, DeviceExt->NtfsInfo.BytesPerIndexRecord, TAG_NTFS);
if (!NewIndexRoot)
{
DPRINT1("ERROR: Unable to allocate memory for new index root attribute!\n");
ReleaseAttributeContext(DirectoryContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
return STATUS_INSUFFICIENT_RESOURCES;
}
// Setup the new index record
RtlZeroMemory(NewIndexRoot, DeviceExt->NtfsInfo.BytesPerIndexRecord); // shouldn't be necessary but aids in debugging
NewIndexRoot->AttributeType = AttributeFileName;
NewIndexRoot->CollationRule = COLLATION_FILE_NAME;
NewIndexRoot->SizeOfEntry = DeviceExt->NtfsInfo.BytesPerIndexRecord;
// If Bytes per index record is less than cluster size, clusters per index record becomes sectors per index
if(NewIndexRoot->SizeOfEntry < DeviceExt->NtfsInfo.BytesPerCluster)
NewIndexRoot->ClustersPerIndexRecord = NewIndexRoot->SizeOfEntry / DeviceExt->NtfsInfo.BytesPerSector;
else
NewIndexRoot->ClustersPerIndexRecord = NewIndexRoot->SizeOfEntry / DeviceExt->NtfsInfo.BytesPerCluster;
// Setup the Index node header
NewIndexRoot->Header.FirstEntryOffset = 0x10;
NewIndexRoot->Header.Flags = INDEX_ROOT_SMALL;
// still need to calculate sizes
// The first index node entry will be for the filename we're adding
IndexNodeEntry = (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)NewIndexRoot + NewIndexRoot->Header.FirstEntryOffset + 0x10);
IndexNodeEntry->Data.Directory.IndexedFile = FileReferenceNumber;
IndexNodeEntry->Flags = INDEX_ROOT_SMALL;
IndexNodeEntry->KeyLength = FIELD_OFFSET(FILENAME_ATTRIBUTE, Name) + (2 * FilenameAttribute->NameLength);
IndexNodeEntry->Length = ALIGN_UP_BY(IndexNodeEntry->KeyLength, 8) + FIELD_OFFSET(INDEX_ENTRY_ATTRIBUTE, FileName);
// Now we can calculate the Node length (temp logic)
NewIndexRoot->Header.TotalSizeOfEntries = NewIndexRoot->Header.FirstEntryOffset + IndexNodeEntry->Length + 0x10;
NewIndexRoot->Header.AllocatedSize = NewIndexRoot->Header.TotalSizeOfEntries;
DPRINT1("New Index Node Entry Stream Length: %u\nNew Inde Node Entry Length: %u\n",
IndexNodeEntry->KeyLength,
IndexNodeEntry->Length);
// copy over the attribute proper
RtlCopyMemory(&IndexNodeEntry->FileName, FilenameAttribute, IndexNodeEntry->KeyLength);
// Now setup the dummy key
IndexNodeEntry = (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)IndexNodeEntry + IndexNodeEntry->Length);
IndexNodeEntry->Data.Directory.IndexedFile = 0;
IndexNodeEntry->Length = 0x10;
IndexNodeEntry->KeyLength = 0;
IndexNodeEntry->Flags = NTFS_INDEX_ENTRY_END;
// This is when we'd normally setup the length (already done above)
// Write back the new index root attribute to the parent directory file record
// First, we need to make sure the attribute is large enough.
// We can't set the size as we normally would, because if we extend past the file record,
// we must create an index allocation and index bitmap (TODO). Also TODO: support file records with
// $ATTRIBUTE_LIST's.
AttributeLength = NewIndexRoot->Header.AllocatedSize + FIELD_OFFSET(INDEX_ROOT_ATTRIBUTE, Header);
DestinationAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)ParentFileRecord + IndexRootOffset);
NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)DestinationAttribute + DestinationAttribute->Length);
if (NextAttribute->Type != AttributeEnd)
{
DPRINT1("FIXME: For now, only resizing index root at the end of a file record is supported!\n");
ExFreePoolWithTag(NewIndexRoot, TAG_NTFS);
ReleaseAttributeContext(DirectoryContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
return STATUS_NOT_IMPLEMENTED;
}
// Update the length of the attribute in the file record of the parent directory
InternalSetResidentAttributeLength(DirectoryContext,
ParentFileRecord,
IndexRootOffset,
AttributeLength);
Status = UpdateFileRecord(DeviceExt, DirectoryMftIndex, ParentFileRecord);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Failed to update file record of directory with index: %llx\n", DirectoryMftIndex);
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
ExFreePoolWithTag(NewIndexRoot, TAG_NTFS);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
return Status;
}
// Update the parent directory with the new index root
Status = WriteAttribute(DeviceExt,
DirectoryContext,
0,
(PUCHAR)NewIndexRoot,
AttributeLength,
&LengthWritten);
if (!NT_SUCCESS(Status) )
{
DPRINT1("ERROR: Unable to write new index root attribute to parent directory!\n");
ExFreePoolWithTag(NewIndexRoot, TAG_NTFS);
ReleaseAttributeContext(DirectoryContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
return Status;
}
// re-read the parent file record, so we can dump it
Status = ReadFileRecord(DeviceExt, DirectoryMftIndex, ParentFileRecord);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Couldn't read parent directory after messing with it!\n");
}
else
{
DPRINT1("Dumping new parent file record:\n");
NtfsDumpFileRecord(DeviceExt, ParentFileRecord);
}
// Cleanup
ExFreePoolWithTag(NewIndexRoot, TAG_NTFS);
ReleaseAttributeContext(DirectoryContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
return Status;
}
ULONGLONG
NtfsGetFileSize(PDEVICE_EXTENSION DeviceExt,

8
drivers/filesystems/ntfs/mft.c
View file

@ -1361,6 +1361,9 @@ FixupUpdateSequenceArray(PDEVICE_EXTENSION Vcb,
* @param DeviceExt
* Pointer to the DEVICE_EXTENSION of the target drive.
*
* @param DestinationIndex
* Pointer to a ULONGLONG which will receive the MFT index where the file record was stored.
*
* @return
* STATUS_SUCCESS on success.
* STATUS_OBJECT_NAME_NOT_FOUND if we can't find the MFT's $Bitmap or if we weren't able
@ -1371,7 +1374,8 @@ FixupUpdateSequenceArray(PDEVICE_EXTENSION Vcb,
*/
NTSTATUS
AddNewMftEntry(PFILE_RECORD_HEADER FileRecord,
PDEVICE_EXTENSION DeviceExt)
PDEVICE_EXTENSION DeviceExt,
PULONGLONG DestinationIndex)
{
NTSTATUS Status = STATUS_SUCCESS;
ULONGLONG MftIndex;
@ -1454,6 +1458,8 @@ AddNewMftEntry(PFILE_RECORD_HEADER FileRecord,
return Status;
}
*DestinationIndex = MftIndex;
ExFreePoolWithTag(BitmapData, TAG_NTFS);
ReleaseAttributeContext(BitmapContext);

18
drivers/filesystems/ntfs/ntfs.h
View file

@ -534,7 +534,8 @@ NTSTATUS
AddFileName(PFILE_RECORD_HEADER FileRecord,
PNTFS_ATTR_RECORD AttributeAddress,
PDEVICE_EXTENSION DeviceExt,
PFILE_OBJECT FileObject);
PFILE_OBJECT FileObject,
PULONGLONG ParentMftIndex);
NTSTATUS
AddStandardInformation(PFILE_RECORD_HEADER FileRecord,
@ -675,6 +676,12 @@ NtfsDeviceControl(PNTFS_IRP_CONTEXT IrpContext);
/* dirctl.c */
NTSTATUS
NtfsAddFilenameToDirectory(PDEVICE_EXTENSION DeviceExt,
ULONGLONG DirectoryMftIndex,
ULONGLONG FileMftIndex,
PFILENAME_ATTRIBUTE FilenameAttribute);
ULONGLONG
NtfsGetFileSize(PDEVICE_EXTENSION DeviceExt,
PFILE_RECORD_HEADER FileRecord,
@ -816,7 +823,8 @@ NtfsFileSystemControl(PNTFS_IRP_CONTEXT IrpContext);
/* mft.c */
NTSTATUS
AddNewMftEntry(PFILE_RECORD_HEADER FileRecord,
PDEVICE_EXTENSION DeviceExt);
PDEVICE_EXTENSION DeviceExt,
PULONGLONG DestinationIndex);
PNTFS_ATTR_CONTEXT
PrepareAttributeContext(PNTFS_ATTR_RECORD AttrRecord);
@ -842,6 +850,12 @@ WriteAttribute(PDEVICE_EXTENSION Vcb,
ULONGLONG
AttributeDataLength(PNTFS_ATTR_RECORD AttrRecord);
VOID
InternalSetResidentAttributeLength(PNTFS_ATTR_CONTEXT AttrContext,
PFILE_RECORD_HEADER FileRecord,
ULONG AttrOffset,
ULONG DataSize);
NTSTATUS
SetAttributeDataLength(PFILE_OBJECT FileObject,
PNTFS_FCB Fcb,