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

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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
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94
drivers/filesystems/ntfs/attrib.c
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@ -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);
}
}