/* INCLUDES *****************************************************************/
#include "ntfs.h"
+#include <ntintsafe.h>
#define NDEBUG
#include <debug.h>
{
PNTFS_ATTR_CONTEXT Context;
- Context = ExAllocatePoolWithTag(NonPagedPool,
- sizeof(NTFS_ATTR_CONTEXT),
- TAG_NTFS);
+ Context = ExAllocateFromNPagedLookasideList(&NtfsGlobalData->AttrCtxtLookasideList);
if(!Context)
{
DPRINT1("Error: Unable to allocate memory for context!\n");
if(!Context->pRecord)
{
DPRINT1("Error: Unable to allocate memory for attribute record!\n");
- ExFreePoolWithTag(Context, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&NtfsGlobalData->AttrCtxtLookasideList, Context);
return NULL;
}
{
DPRINT1("Unable to convert data runs to MCB!\n");
ExFreePoolWithTag(Context->pRecord, TAG_NTFS);
- ExFreePoolWithTag(Context, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&NtfsGlobalData->AttrCtxtLookasideList, Context);
return NULL;
}
}
VOID
ReleaseAttributeContext(PNTFS_ATTR_CONTEXT Context)
{
- if (Context->pRecord->IsNonResident)
+ if (Context->pRecord)
{
- FsRtlUninitializeLargeMcb(&Context->DataRunsMCB);
- }
+ if (Context->pRecord->IsNonResident)
+ {
+ FsRtlUninitializeLargeMcb(&Context->DataRunsMCB);
+ }
- if(Context->pRecord)
ExFreePoolWithTag(Context->pRecord, TAG_NTFS);
+ }
- ExFreePoolWithTag(Context, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&NtfsGlobalData->AttrCtxtLookasideList, Context);
}
* STATUS_CANT_WAIT if CanWait was FALSE and the function could not get immediate, exclusive access to the MFT.
*
* @remarks
-* Increases the size of the Master File Table by 8 records. Bitmap entries for the new records are cleared,
+* Increases the size of the Master File Table by 64 records. Bitmap entries for the new records are cleared,
* and the bitmap is also enlarged if needed. Mimicking Windows' behavior when enlarging the mft is still TODO.
* This function will wait for exlusive access to the volume fcb.
*/
LARGE_INTEGER BitmapSize;
LARGE_INTEGER DataSize;
LONGLONG BitmapSizeDifference;
- ULONG DataSizeDifference = Vcb->NtfsInfo.BytesPerFileRecord * 8;
+ ULONG NewRecords = ATTR_RECORD_ALIGNMENT * 8; // Allocate one new record for every bit of every byte we'll be adding to the bitmap
+ ULONG DataSizeDifference = Vcb->NtfsInfo.BytesPerFileRecord * NewRecords;
ULONG BitmapOffset;
PUCHAR BitmapBuffer;
ULONGLONG BitmapBytes;
ULONGLONG NewBitmapSize;
+ ULONGLONG FirstNewMftIndex;
ULONG BytesRead;
ULONG LengthWritten;
+ PFILE_RECORD_HEADER BlankFileRecord;
+ ULONG i;
NTSTATUS Status;
DPRINT1("IncreaseMftSize(%p, %s)\n", Vcb, CanWait ? "TRUE" : "FALSE");
return STATUS_CANT_WAIT;
}
+ // Create a blank file record that will be used later
+ BlankFileRecord = NtfsCreateEmptyFileRecord(Vcb);
+ if (!BlankFileRecord)
+ {
+ DPRINT1("Error: Unable to create empty file record!\n");
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ // Clear the flags (file record is not in use)
+ BlankFileRecord->Flags = 0;
+
// Find the bitmap attribute of master file table
- Status = FindAttribute(Vcb, Vcb->MasterFileTable, AttributeBitmap, L"", 0, &BitmapContext, &BitmapOffset);
+ Status = FindAttribute(Vcb, Vcb->MasterFileTable, AttributeBitmap, L"", 0, &BitmapContext, NULL);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Couldn't find $BITMAP attribute of Mft!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
ExReleaseResourceLite(&(Vcb->DirResource));
return Status;
}
// Calculate the new mft size
DataSize.QuadPart = AttributeDataLength(Vcb->MFTContext->pRecord) + DataSizeDifference;
+ // Find the index of the first Mft entry that will be created
+ FirstNewMftIndex = AttributeDataLength(Vcb->MFTContext->pRecord) / Vcb->NtfsInfo.BytesPerFileRecord;
+
// Determine how many bytes will make up the bitmap
BitmapBytes = DataSize.QuadPart / Vcb->NtfsInfo.BytesPerFileRecord / 8;
-
+ if ((DataSize.QuadPart / Vcb->NtfsInfo.BytesPerFileRecord) % 8 != 0)
+ BitmapBytes++;
+
+ // Windows will always keep the number of bytes in a bitmap as a multiple of 8, so no bytes are wasted on slack
+ BitmapBytes = ALIGN_UP_BY(BitmapBytes, ATTR_RECORD_ALIGNMENT);
+
// Determine how much we need to adjust the bitmap size (it's possible we don't)
BitmapSizeDifference = BitmapBytes - BitmapSize.QuadPart;
NewBitmapSize = max(BitmapSize.QuadPart + BitmapSizeDifference, BitmapSize.QuadPart);
if (!BitmapBuffer)
{
DPRINT1("ERROR: Unable to allocate memory for bitmap attribute!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
ExReleaseResourceLite(&(Vcb->DirResource));
ReleaseAttributeContext(BitmapContext);
return STATUS_INSUFFICIENT_RESOURCES;
if (BytesRead != BitmapSize.LowPart)
{
DPRINT1("ERROR: Bytes read != Bitmap size!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
ExReleaseResourceLite(&(Vcb->DirResource));
ExFreePoolWithTag(BitmapBuffer, TAG_NTFS);
ReleaseAttributeContext(BitmapContext);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Failed to set size of $MFT data attribute!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
ExReleaseResourceLite(&(Vcb->DirResource));
ExFreePoolWithTag(BitmapBuffer, TAG_NTFS);
ReleaseAttributeContext(BitmapContext);
return Status;
}
+
+ // We'll need to find the bitmap again, because its offset will have changed after resizing the data attribute
+ ReleaseAttributeContext(BitmapContext);
+ Status = FindAttribute(Vcb, Vcb->MasterFileTable, AttributeBitmap, L"", 0, &BitmapContext, &BitmapOffset);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Couldn't find $BITMAP attribute of Mft!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
+ ExReleaseResourceLite(&(Vcb->DirResource));
+ return Status;
+ }
// If the bitmap grew
if (BitmapSizeDifference > 0)
{
// Set the new bitmap size
- BitmapSize.QuadPart += BitmapSizeDifference;
+ BitmapSize.QuadPart = NewBitmapSize;
if (BitmapContext->pRecord->IsNonResident)
Status = SetNonResidentAttributeDataLength(Vcb, BitmapContext, BitmapOffset, Vcb->MasterFileTable, &BitmapSize);
else
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Failed to set size of bitmap attribute!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
ExReleaseResourceLite(&(Vcb->DirResource));
ExFreePoolWithTag(BitmapBuffer, TAG_NTFS);
ReleaseAttributeContext(BitmapContext);
}
}
- //NtfsDumpFileAttributes(Vcb, FileRecord);
+ NtfsDumpFileAttributes(Vcb, Vcb->MasterFileTable);
// Update the file record with the new attribute sizes
Status = UpdateFileRecord(Vcb, Vcb->VolumeFcb->MFTIndex, Vcb->MasterFileTable);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Failed to update $MFT file record!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
ExReleaseResourceLite(&(Vcb->DirResource));
ExFreePoolWithTag(BitmapBuffer, TAG_NTFS);
ReleaseAttributeContext(BitmapContext);
}
// Write out the new bitmap
- Status = WriteAttribute(Vcb, BitmapContext, BitmapOffset, BitmapBuffer, BitmapSize.LowPart, &LengthWritten, Vcb->MasterFileTable);
+ Status = WriteAttribute(Vcb, BitmapContext, 0, BitmapBuffer, NewBitmapSize, &LengthWritten, Vcb->MasterFileTable);
if (!NT_SUCCESS(Status))
{
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
ExReleaseResourceLite(&(Vcb->DirResource));
ExFreePoolWithTag(BitmapBuffer, TAG_NTFS);
ReleaseAttributeContext(BitmapContext);
return Status;
}
+ // Create blank records for the new file record entries.
+ for (i = 0; i < NewRecords; i++)
+ {
+ Status = UpdateFileRecord(Vcb, FirstNewMftIndex + i, BlankFileRecord);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Failed to write blank file record!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
+ ExReleaseResourceLite(&(Vcb->DirResource));
+ ExFreePoolWithTag(BitmapBuffer, TAG_NTFS);
+ ReleaseAttributeContext(BitmapContext);
+ return Status;
+ }
+ }
+
+ // Update the mft mirror
+ Status = UpdateMftMirror(Vcb);
+
// Cleanup
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, BlankFileRecord);
ExReleaseResourceLite(&(Vcb->DirResource));
ExFreePoolWithTag(BitmapBuffer, TAG_NTFS);
ReleaseAttributeContext(BitmapContext);
- return STATUS_SUCCESS;
+ return Status;
}
/**
DestinationAttribute->NonResident.AllocatedSize = AllocationSize;
DestinationAttribute->NonResident.DataSize = DataSize->QuadPart;
DestinationAttribute->NonResident.InitializedSize = DataSize->QuadPart;
+
+ // HighestVCN seems to be set incorrectly somewhere. Apply a hack-fix to reset it.
+ // HACKHACK FIXME: Fix for sparse files; this math won't work in that case.
+ AttrContext->pRecord->NonResident.HighestVCN = ((ULONGLONG)AllocationSize / Vcb->NtfsInfo.BytesPerCluster) - 1;
+ DestinationAttribute->NonResident.HighestVCN = AttrContext->pRecord->NonResident.HighestVCN;
DPRINT("Allocated Size: %I64u\n", DestinationAttribute->NonResident.AllocatedSize);
DPRINT1("Unable to create LargeMcb!\n");
if (AttribDataSize.QuadPart > 0)
ExFreePoolWithTag(AttribData, TAG_NTFS);
+ ExFreePoolWithTag(NewRecord, TAG_NTFS);
_SEH2_YIELD(return _SEH2_GetExceptionCode());
} _SEH2_END;
DPRINT1("ERROR: Couldn't update file record to continue migration!\n");
if (AttribDataSize.QuadPart > 0)
ExFreePoolWithTag(AttribData, TAG_NTFS);
+ ExFreePoolWithTag(NewRecord, TAG_NTFS);
return Status;
}
//TEMPTEMP
ULONG UsedBufferSize;
TempBuffer = ExAllocatePoolWithTag(NonPagedPool, Vcb->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
+ if (TempBuffer == NULL)
+ {
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
LastLCN = 0;
CurrentOffset = 0;
if (*DataRun == 0)
{
+ ExFreePoolWithTag(TempBuffer, TAG_NTFS);
return AlreadyRead;
}
// Do we need to read the file record?
if (FileRecord == NULL)
{
- FileRecord = ExAllocatePoolWithTag(NonPagedPool, Vcb->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
+ FileRecord = ExAllocateFromNPagedLookasideList(&Vcb->FileRecLookasideList);
if (!FileRecord)
{
DPRINT1("Error: Couldn't allocate file record!\n");
{
DPRINT1("ERROR: Couldn't find matching attribute!\n");
if(FileRecordAllocated)
- ExFreePoolWithTag(FileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, FileRecord);
return Status;
}
DPRINT1("DRIVER ERROR: Data being written extends past end of file record!\n");
ReleaseAttributeContext(FoundContext);
if (FileRecordAllocated)
- ExFreePoolWithTag(FileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, FileRecord);
return STATUS_INVALID_PARAMETER;
}
ReleaseAttributeContext(FoundContext);
if (FileRecordAllocated)
- ExFreePoolWithTag(FileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, FileRecord);
if (NT_SUCCESS(Status))
*RealLengthWritten = Length;
CurrentOffset = 0;
// This will be rewritten in the next iteration to just use the DataRuns MCB directly
- TempBuffer = ExAllocatePoolWithTag(NonPagedPool, Vcb->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
+ TempBuffer = ExAllocatePoolWithTag(NonPagedPool, Vcb->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
+ if (TempBuffer == NULL)
+ {
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
ConvertLargeMCBToDataRuns(&Context->DataRunsMCB,
TempBuffer,
// (it may require increasing the allocation size).
DataRunStartLCN = -1;
DPRINT1("FIXME: Writing to sparse files is not supported yet!\n");
- return STATUS_NOT_IMPLEMENTED;
+ Status = STATUS_NOT_IMPLEMENTED;
+ goto Cleanup;
}
// Have we reached the data run we're trying to write to?
// (Presently, this code will rarely be reached, the write will usually have already failed by now)
// [We can reach here by creating a new file record when the MFT isn't large enough]
DPRINT1("FIXME: Master File Table needs to be enlarged.\n");
- return STATUS_END_OF_FILE;
+ Status = STATUS_END_OF_FILE;
+ goto Cleanup;
}
CurrentOffset += DataRunLength * Vcb->NtfsInfo.BytesPerCluster;
Context->CacheRunLastLCN = LastLCN;
Context->CacheRunCurrentOffset = CurrentOffset;
- return Status;
+ goto Cleanup;
}
Length -= WriteLength;
if (DataRunStartLCN == -1)
{
DPRINT1("FIXME: Don't know how to write to sparse files yet! (DataRunStartLCN == -1)\n");
- return STATUS_NOT_IMPLEMENTED;
+ Status = STATUS_NOT_IMPLEMENTED;
+ goto Cleanup;
}
else
{
{
// Failed sanity check.
DPRINT1("Encountered EOF before expected!\n");
- return STATUS_END_OF_FILE;
+ Status = STATUS_END_OF_FILE;
+ goto Cleanup;
}
break;
}
} // end while (Length > 0) [more data to write]
- // TEMPTEMP
- if (Context->pRecord->IsNonResident)
- ExFreePoolWithTag(TempBuffer, TAG_NTFS);
-
Context->CacheRun = DataRun;
Context->CacheRunOffset = Offset + *RealLengthWritten;
Context->CacheRunStartLCN = DataRunStartLCN;
Context->CacheRunLastLCN = LastLCN;
Context->CacheRunCurrentOffset = CurrentOffset;
+Cleanup:
+ // TEMPTEMP
+ if (Context->pRecord->IsNonResident)
+ ExFreePoolWithTag(TempBuffer, TAG_NTFS);
+
return Status;
}
NewAllocationSize,
CaseSensitive ? "TRUE" : "FALSE");
- MftRecord = ExAllocatePoolWithTag(NonPagedPool,
- Vcb->NtfsInfo.BytesPerFileRecord,
- TAG_NTFS);
+ MftRecord = ExAllocateFromNPagedLookasideList(&Vcb->FileRecLookasideList);
if (MftRecord == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
Status = ReadFileRecord(Vcb, ParentMFTIndex, MftRecord);
if (!NT_SUCCESS(Status))
{
- ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MftRecord);
return Status;
}
Status = FindAttribute(Vcb, MftRecord, AttributeIndexRoot, L"$I30", 4, &IndexRootCtx, NULL);
if (!NT_SUCCESS(Status))
{
- ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MftRecord);
return Status;
}
if (IndexRecord == NULL)
{
ReleaseAttributeContext(IndexRootCtx);
- ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MftRecord);
return STATUS_INSUFFICIENT_RESOURCES;
}
DPRINT1("ERROR: Failed to read Index Root!\n");
ExFreePoolWithTag(IndexRecord, TAG_NTFS);
ReleaseAttributeContext(IndexRootCtx);
- ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MftRecord);
+ return Status;
}
IndexRoot = (PINDEX_ROOT_ATTRIBUTE)IndexRecord;
ReleaseAttributeContext(IndexRootCtx);
ExFreePoolWithTag(IndexRecord, TAG_NTFS);
- ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MftRecord);
return Status;
}
ReleaseAttributeContext(BitmapContext);
return STATUS_INSUFFICIENT_RESOURCES;
}
+ RtlZeroMemory(BitmapBuffer, BitmapDataSize + sizeof(ULONG));
// Get a ULONG-aligned pointer for the bitmap itself
BitmapData = (PUCHAR)ALIGN_UP_BY((ULONG_PTR)BitmapBuffer, sizeof(ULONG));
PB_TREE NewTree;
ULONG BtreeIndexLength;
ULONG MaxIndexRootSize;
+ PB_TREE_KEY NewLeftKey;
+ PB_TREE_FILENAME_NODE NewRightHandNode;
+ LARGE_INTEGER MinIndexRootSize;
+ ULONG NewMaxIndexRootSize;
+ ULONG NodeSize;
// Allocate memory for the parent directory
- ParentFileRecord = ExAllocatePoolWithTag(NonPagedPool,
- DeviceExt->NtfsInfo.BytesPerFileRecord,
- TAG_NTFS);
+ ParentFileRecord = ExAllocateFromNPagedLookasideList(&DeviceExt->FileRecLookasideList);
if (!ParentFileRecord)
{
DPRINT1("ERROR: Couldn't allocate memory for file record!\n");
Status = ReadFileRecord(DeviceExt, DirectoryMftIndex, ParentFileRecord);
if (!NT_SUCCESS(Status))
{
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
DPRINT1("ERROR: Couldn't read parent directory with index %I64u\n",
DirectoryMftIndex);
return Status;
}
+#ifndef NDEBUG
DPRINT1("Dumping old parent file record:\n");
NtfsDumpFileRecord(DeviceExt, ParentFileRecord);
+#endif
// Find the index root attribute for the directory
Status = FindAttribute(DeviceExt,
{
DPRINT1("ERROR: Couldn't find $I30 $INDEX_ROOT attribute for parent directory with MFT #: %I64u!\n",
DirectoryMftIndex);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
return Status;
}
MaxIndexRootSize = DeviceExt->NtfsInfo.BytesPerFileRecord // Start with the size of a file record
- IndexRootOffset // Subtract the length of everything that comes before index root
- IndexRootContext->pRecord->Resident.ValueOffset // Subtract the length of the attribute header for index root
- - FIELD_OFFSET(INDEX_ROOT_ATTRIBUTE, Header) // Subtract the length of the index header for index root
+ - sizeof(INDEX_ROOT_ATTRIBUTE) // Subtract the length of the index root header
- (sizeof(ULONG) * 2); // Subtract the length of the file record end marker and padding
// Are there attributes after this one?
{
DPRINT1("ERROR: Couldn't allocate memory for index root attribute!\n");
ReleaseAttributeContext(IndexRootContext);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
return STATUS_INSUFFICIENT_RESOURCES;
}
DPRINT1("ERROR: Couln't read index root attribute for Mft index #%I64u\n", DirectoryMftIndex);
ReleaseAttributeContext(IndexRootContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
return Status;
}
DPRINT1("ERROR: Failed to create B-Tree from Index!\n");
ReleaseAttributeContext(IndexRootContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
return Status;
}
+#ifndef NDEBUG
DumpBTree(NewTree);
+#endif
// Insert the key for the file we're adding
- Status = NtfsInsertKey(NewTree, FileReferenceNumber, FilenameAttribute, NewTree->RootNode, CaseSensitive, MaxIndexRootSize);
+ Status = NtfsInsertKey(NewTree,
+ FileReferenceNumber,
+ FilenameAttribute,
+ NewTree->RootNode,
+ CaseSensitive,
+ MaxIndexRootSize,
+ I30IndexRoot->SizeOfEntry,
+ &NewLeftKey,
+ &NewRightHandNode);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Failed to insert key into B-Tree!\n");
DestroyBTree(NewTree);
ReleaseAttributeContext(IndexRootContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
return Status;
}
+#ifndef NDEBUG
DumpBTree(NewTree);
+#endif
+
+ // The root node can't be split
+ ASSERT(NewLeftKey == NULL);
+ ASSERT(NewRightHandNode == NULL);
+
+ // Convert B*Tree back to Index
+
+ // Updating the index allocation can change the size available for the index root,
+ // And if the index root is demoted, the index allocation will need to be updated again,
+ // which may change the size available for index root... etc.
+ // My solution is to decrease index root to the size it would be if it was demoted,
+ // then UpdateIndexAllocation will have an accurate representation of the maximum space
+ // it can use in the file record. There's still a chance that the act of allocating an
+ // index node after demoting the index root will increase the size of the file record beyond
+ // it's limit, but if that happens, an attribute-list will most definitely be needed.
+ // This a bit hacky, but it seems to be functional.
+
+ // Calculate the minimum size of the index root attribute, considering one dummy key and one VCN
+ MinIndexRootSize.QuadPart = sizeof(INDEX_ROOT_ATTRIBUTE) // size of the index root headers
+ + 0x18; // Size of dummy key with a VCN for a subnode
+ ASSERT(MinIndexRootSize.QuadPart % ATTR_RECORD_ALIGNMENT == 0);
- // Convert B*Tree back to Index, starting with the index allocation
+ // Temporarily shrink the index root to it's minimal size
+ AttributeLength = MinIndexRootSize.LowPart;
+ AttributeLength += sizeof(INDEX_ROOT_ATTRIBUTE);
+
+
+ // FIXME: IndexRoot will probably be invalid until we're finished. If we fail before we finish, the directory will probably be toast.
+ // The potential for catastrophic data-loss exists!!! :)
+
+ // Update the length of the attribute in the file record of the parent directory
+ Status = InternalSetResidentAttributeLength(DeviceExt,
+ IndexRootContext,
+ ParentFileRecord,
+ IndexRootOffset,
+ AttributeLength);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Unable to set length of index root!\n");
+ DestroyBTree(NewTree);
+ ReleaseAttributeContext(IndexRootContext);
+ ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
+ return Status;
+ }
+
+ // Update the index allocation
Status = UpdateIndexAllocation(DeviceExt, NewTree, I30IndexRoot->SizeOfEntry, ParentFileRecord);
if (!NT_SUCCESS(Status))
{
DestroyBTree(NewTree);
ReleaseAttributeContext(IndexRootContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
return Status;
}
+#ifndef NDEBUG
+ DPRINT1("Index Allocation updated\n");
+ DumpBTree(NewTree);
+#endif
+
+ // Find the maximum index root size given what the file record can hold
+ // First, find the max index size assuming index root is the last attribute
+ NewMaxIndexRootSize =
+ DeviceExt->NtfsInfo.BytesPerFileRecord // Start with the size of a file record
+ - IndexRootOffset // Subtract the length of everything that comes before index root
+ - IndexRootContext->pRecord->Resident.ValueOffset // Subtract the length of the attribute header for index root
+ - sizeof(INDEX_ROOT_ATTRIBUTE) // Subtract the length of the index root header
+ - (sizeof(ULONG) * 2); // Subtract the length of the file record end marker and padding
+
+ // Are there attributes after this one?
+ NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)ParentFileRecord + IndexRootOffset + IndexRootContext->pRecord->Length);
+ if (NextAttribute->Type != AttributeEnd)
+ {
+ // Find the length of all attributes after this one, not counting the end marker
+ ULONG LengthOfAttributes = 0;
+ PNTFS_ATTR_RECORD CurrentAttribute = NextAttribute;
+ while (CurrentAttribute->Type != AttributeEnd)
+ {
+ LengthOfAttributes += CurrentAttribute->Length;
+ CurrentAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)CurrentAttribute + CurrentAttribute->Length);
+ }
+
+ // Leave room for the existing attributes
+ NewMaxIndexRootSize -= LengthOfAttributes;
+ }
+
+ // The index allocation and index bitmap may have grown, leaving less room for the index root,
+ // so now we need to double-check that index root isn't too large
+ NodeSize = GetSizeOfIndexEntries(NewTree->RootNode);
+ if (NodeSize > NewMaxIndexRootSize)
+ {
+ DPRINT1("Demoting index root.\nNodeSize: 0x%lx\nNewMaxIndexRootSize: 0x%lx\n", NodeSize, NewMaxIndexRootSize);
+
+ Status = DemoteBTreeRoot(NewTree);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Failed to demote index root!\n");
+ DestroyBTree(NewTree);
+ ReleaseAttributeContext(IndexRootContext);
+ ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
+ return Status;
+ }
+
+ // We need to update the index allocation once more
+ Status = UpdateIndexAllocation(DeviceExt, NewTree, I30IndexRoot->SizeOfEntry, ParentFileRecord);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Failed to update index allocation from B-Tree!\n");
+ DestroyBTree(NewTree);
+ ReleaseAttributeContext(IndexRootContext);
+ ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
+ return Status;
+ }
+
+ // re-recalculate max size of index root
+ NewMaxIndexRootSize =
+ // Find the maximum index size given what the file record can hold
+ // First, find the max index size assuming index root is the last attribute
+ DeviceExt->NtfsInfo.BytesPerFileRecord // Start with the size of a file record
+ - IndexRootOffset // Subtract the length of everything that comes before index root
+ - IndexRootContext->pRecord->Resident.ValueOffset // Subtract the length of the attribute header for index root
+ - sizeof(INDEX_ROOT_ATTRIBUTE) // Subtract the length of the index root header
+ - (sizeof(ULONG) * 2); // Subtract the length of the file record end marker and padding
+
+ // Are there attributes after this one?
+ NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)ParentFileRecord + IndexRootOffset + IndexRootContext->pRecord->Length);
+ if (NextAttribute->Type != AttributeEnd)
+ {
+ // Find the length of all attributes after this one, not counting the end marker
+ ULONG LengthOfAttributes = 0;
+ PNTFS_ATTR_RECORD CurrentAttribute = NextAttribute;
+ while (CurrentAttribute->Type != AttributeEnd)
+ {
+ LengthOfAttributes += CurrentAttribute->Length;
+ CurrentAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)CurrentAttribute + CurrentAttribute->Length);
+ }
+
+ // Leave room for the existing attributes
+ NewMaxIndexRootSize -= LengthOfAttributes;
+ }
+
+
+ }
+
// Create the Index Root from the B*Tree
- Status = CreateIndexRootFromBTree(DeviceExt, NewTree, MaxIndexRootSize, &NewIndexRoot, &BtreeIndexLength);
+ Status = CreateIndexRootFromBTree(DeviceExt, NewTree, NewMaxIndexRootSize, &NewIndexRoot, &BtreeIndexLength);
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Failed to create Index root from B-Tree!\n");
DestroyBTree(NewTree);
ReleaseAttributeContext(IndexRootContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
return Status;
}
// First, we need to resize the attribute.
// CreateIndexRootFromBTree() should have verified that the index root fits within MaxIndexSize.
- // 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.
+ // We can't set the size as we normally would, because $INDEX_ROOT must always be resident.
AttributeLength = NewIndexRoot->Header.AllocatedSize + FIELD_OFFSET(INDEX_ROOT_ATTRIBUTE, Header);
if (AttributeLength != IndexRootContext->pRecord->Resident.ValueLength)
ExFreePoolWithTag(NewIndexRoot, TAG_NTFS);
ReleaseAttributeContext(IndexRootContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
DPRINT1("ERROR: Unable to set resident attribute length!\n");
return Status;
}
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Failed to update file record of directory with index: %llx\n", DirectoryMftIndex);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
ExFreePoolWithTag(NewIndexRoot, TAG_NTFS);
ReleaseAttributeContext(IndexRootContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
ExFreePoolWithTag(NewIndexRoot, TAG_NTFS);
ReleaseAttributeContext(IndexRootContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
return Status;
}
}
else
{
- DPRINT1("Dumping new parent file record:\n");
+#ifndef NDEBUG
+ DPRINT1("Dumping new B-Tree:\n");
+
+ Status = CreateBTreeFromIndex(DeviceExt, ParentFileRecord, IndexRootContext, NewIndexRoot, &NewTree);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Couldn't re-create b-tree\n");
+ return Status;
+ }
+
+ DumpBTree(NewTree);
+
+ DestroyBTree(NewTree);
+
NtfsDumpFileRecord(DeviceExt, ParentFileRecord);
+#endif
}
// Cleanup
ExFreePoolWithTag(NewIndexRoot, TAG_NTFS);
ReleaseAttributeContext(IndexRootContext);
ExFreePoolWithTag(I30IndexRoot, TAG_NTFS);
- ExFreePoolWithTag(ParentFileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&DeviceExt->FileRecLookasideList, ParentFileRecord);
return Status;
}
}
}
+/**
+* @name UpdateMftMirror
+* @implemented
+*
+* Backs-up the first ~4 master file table entries to the $MFTMirr file.
+*
+* @param Vcb
+* Pointer to an NTFS_VCB for the volume whose Mft mirror is being updated.
+*
+* @return
+
+* STATUS_SUCCESS on success.
+* STATUS_INSUFFICIENT_RESOURCES if an allocation failed.
+* STATUS_UNSUCCESSFUL if we couldn't read the master file table.
+*
+* @remarks
+* NTFS maintains up-to-date copies of the first several mft entries in the $MFTMirr file. Usually, the first 4 file
+* records from the mft are stored. The exact number of entries is determined by the size of $MFTMirr's $DATA.
+* If $MFTMirr is not up-to-date, chkdsk will reject every change it can find prior to when $MFTMirr was last updated.
+* Therefore, it's recommended to call this function if the volume changes considerably. For instance, IncreaseMftSize()
+* relies on this function to keep chkdsk from deleting the mft entries it creates. Note that under most instances, creating
+* or deleting a file will not affect the first ~four mft entries, and so will not require updating the mft mirror.
+*/
+NTSTATUS
+UpdateMftMirror(PNTFS_VCB Vcb)
+{
+ PFILE_RECORD_HEADER MirrorFileRecord;
+ PNTFS_ATTR_CONTEXT MirrDataContext;
+ PNTFS_ATTR_CONTEXT MftDataContext;
+ PCHAR DataBuffer;
+ ULONGLONG DataLength;
+ NTSTATUS Status;
+ ULONG BytesRead;
+ ULONG LengthWritten;
+
+ // Allocate memory for the Mft mirror file record
+ MirrorFileRecord = ExAllocateFromNPagedLookasideList(&Vcb->FileRecLookasideList);
+ if (!MirrorFileRecord)
+ {
+ DPRINT1("Error: Failed to allocate memory for $MFTMirr!\n");
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ // Read the Mft Mirror file record
+ Status = ReadFileRecord(Vcb, NTFS_FILE_MFTMIRR, MirrorFileRecord);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Failed to read $MFTMirr!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MirrorFileRecord);
+ return Status;
+ }
+
+ // Find the $DATA attribute of $MFTMirr
+ Status = FindAttribute(Vcb, MirrorFileRecord, AttributeData, L"", 0, &MirrDataContext, NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Couldn't find $DATA attribute!\n");
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MirrorFileRecord);
+ return Status;
+ }
+
+ // Find the $DATA attribute of $MFT
+ Status = FindAttribute(Vcb, Vcb->MasterFileTable, AttributeData, L"", 0, &MftDataContext, NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Couldn't find $DATA attribute!\n");
+ ReleaseAttributeContext(MirrDataContext);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MirrorFileRecord);
+ return Status;
+ }
+
+ // Get the size of the mirror's $DATA attribute
+ DataLength = AttributeDataLength(MirrDataContext->pRecord);
+
+ ASSERT(DataLength % Vcb->NtfsInfo.BytesPerFileRecord == 0);
+
+ // Create buffer for the mirror's $DATA attribute
+ DataBuffer = ExAllocatePoolWithTag(NonPagedPool, DataLength, TAG_NTFS);
+ if (!DataBuffer)
+ {
+ DPRINT1("Error: Couldn't allocate memory for $DATA buffer!\n");
+ ReleaseAttributeContext(MftDataContext);
+ ReleaseAttributeContext(MirrDataContext);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MirrorFileRecord);
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ ASSERT(DataLength < ULONG_MAX);
+
+ // Back up the first several entries of the Mft's $DATA Attribute
+ BytesRead = ReadAttribute(Vcb, MftDataContext, 0, DataBuffer, (ULONG)DataLength);
+ if (BytesRead != (ULONG)DataLength)
+ {
+ DPRINT1("Error: Failed to read $DATA for $MFTMirr!\n");
+ ReleaseAttributeContext(MftDataContext);
+ ReleaseAttributeContext(MirrDataContext);
+ ExFreePoolWithTag(DataBuffer, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MirrorFileRecord);
+ return STATUS_UNSUCCESSFUL;
+ }
+
+ // Write the mirror's $DATA attribute
+ Status = WriteAttribute(Vcb,
+ MirrDataContext,
+ 0,
+ (PUCHAR)DataBuffer,
+ DataLength,
+ &LengthWritten,
+ MirrorFileRecord);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Failed to write $DATA attribute of $MFTMirr!\n");
+ }
+
+ // Cleanup
+ ReleaseAttributeContext(MftDataContext);
+ ReleaseAttributeContext(MirrDataContext);
+ ExFreePoolWithTag(DataBuffer, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MirrorFileRecord);
+
+ return Status;
+}
+
#if 0
static
VOID
}
#endif
+NTSTATUS
+BrowseSubNodeIndexEntries(PNTFS_VCB Vcb,
+ PFILE_RECORD_HEADER MftRecord,
+ ULONG IndexBlockSize,
+ PUNICODE_STRING FileName,
+ PNTFS_ATTR_CONTEXT IndexAllocationContext,
+ PRTL_BITMAP Bitmap,
+ ULONGLONG VCN,
+ PULONG StartEntry,
+ PULONG CurrentEntry,
+ BOOLEAN DirSearch,
+ BOOLEAN CaseSensitive,
+ ULONGLONG *OutMFTIndex)
+{
+ PINDEX_BUFFER IndexRecord;
+ ULONGLONG Offset;
+ ULONG BytesRead;
+ PINDEX_ENTRY_ATTRIBUTE FirstEntry;
+ PINDEX_ENTRY_ATTRIBUTE LastEntry;
+ PINDEX_ENTRY_ATTRIBUTE IndexEntry;
+ ULONG NodeNumber;
+ NTSTATUS Status;
+
+ DPRINT("BrowseSubNodeIndexEntries(%p, %p, %lu, %wZ, %p, %p, %I64d, %lu, %lu, %s, %s, %p)\n",
+ Vcb,
+ MftRecord,
+ IndexBlockSize,
+ FileName,
+ IndexAllocationContext,
+ Bitmap,
+ VCN,
+ *StartEntry,
+ *CurrentEntry,
+ "FALSE",
+ DirSearch ? "TRUE" : "FALSE",
+ CaseSensitive ? "TRUE" : "FALSE",
+ OutMFTIndex);
+
+ // Calculate node number as VCN / Clusters per index record
+ NodeNumber = VCN / (Vcb->NtfsInfo.BytesPerIndexRecord / Vcb->NtfsInfo.BytesPerCluster);
+
+ // Is the bit for this node clear in the bitmap?
+ if (!RtlCheckBit(Bitmap, NodeNumber))
+ {
+ DPRINT1("File system corruption detected, node with VCN %I64u is being reused or is marked as deleted.\n", VCN);
+ return STATUS_DATA_ERROR;
+ }
+
+ // Clear the bit for this node so it can't be recursively referenced
+ RtlClearBits(Bitmap, NodeNumber, 1);
+
+ // Allocate memory for the index record
+ IndexRecord = ExAllocatePoolWithTag(NonPagedPool, IndexBlockSize, TAG_NTFS);
+ if (!IndexRecord)
+ {
+ DPRINT1("Unable to allocate memory for index record!\n");
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ // Calculate offset of index record
+ Offset = VCN * Vcb->NtfsInfo.BytesPerCluster;
+
+ // Read the index record
+ BytesRead = ReadAttribute(Vcb, IndexAllocationContext, Offset, (PCHAR)IndexRecord, IndexBlockSize);
+ if (BytesRead != IndexBlockSize)
+ {
+ DPRINT1("Unable to read index record!\n");
+ ExFreePoolWithTag(IndexRecord, TAG_NTFS);
+ return STATUS_UNSUCCESSFUL;
+ }
+
+ // Assert that we're dealing with an index record here
+ ASSERT(IndexRecord->Ntfs.Type == NRH_INDX_TYPE);
+
+ // Apply the fixup array to the index record
+ Status = FixupUpdateSequenceArray(Vcb, &((PFILE_RECORD_HEADER)IndexRecord)->Ntfs);
+ if (!NT_SUCCESS(Status))
+ {
+ ExFreePoolWithTag(IndexRecord, TAG_NTFS);
+ DPRINT1("Failed to apply fixup array!\n");
+ return Status;
+ }
+
+ ASSERT(IndexRecord->Header.AllocatedSize + FIELD_OFFSET(INDEX_BUFFER, Header) == IndexBlockSize);
+ FirstEntry = (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)&IndexRecord->Header + IndexRecord->Header.FirstEntryOffset);
+ LastEntry = (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)&IndexRecord->Header + IndexRecord->Header.TotalSizeOfEntries);
+ ASSERT(LastEntry <= (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)IndexRecord + IndexBlockSize));
+
+ // Loop through all Index Entries of index, starting with FirstEntry
+ IndexEntry = FirstEntry;
+ while (IndexEntry <= LastEntry)
+ {
+ // Does IndexEntry have a sub-node?
+ if (IndexEntry->Flags & NTFS_INDEX_ENTRY_NODE)
+ {
+ if (!(IndexRecord->Header.Flags & INDEX_NODE_LARGE) || !IndexAllocationContext)
+ {
+ DPRINT1("Filesystem corruption detected!\n");
+ }
+ else
+ {
+ Status = BrowseSubNodeIndexEntries(Vcb,
+ MftRecord,
+ IndexBlockSize,
+ FileName,
+ IndexAllocationContext,
+ Bitmap,
+ GetIndexEntryVCN(IndexEntry),
+ StartEntry,
+ CurrentEntry,
+ DirSearch,
+ CaseSensitive,
+ OutMFTIndex);
+ if (NT_SUCCESS(Status))
+ {
+ ExFreePoolWithTag(IndexRecord, TAG_NTFS);
+ return Status;
+ }
+ }
+ }
+
+ // Are we done?
+ if (IndexEntry->Flags & NTFS_INDEX_ENTRY_END)
+ break;
+
+ // If we've found a file whose index is greater than or equal to StartEntry that matches the search criteria
+ if ((IndexEntry->Data.Directory.IndexedFile & NTFS_MFT_MASK) >= NTFS_FILE_FIRST_USER_FILE &&
+ *CurrentEntry >= *StartEntry &&
+ IndexEntry->FileName.NameType != NTFS_FILE_NAME_DOS &&
+ CompareFileName(FileName, IndexEntry, DirSearch, CaseSensitive))
+ {
+ *StartEntry = *CurrentEntry;
+ *OutMFTIndex = (IndexEntry->Data.Directory.IndexedFile & NTFS_MFT_MASK);
+ ExFreePoolWithTag(IndexRecord, TAG_NTFS);
+ return STATUS_SUCCESS;
+ }
+
+ // Advance to the next index entry
+ (*CurrentEntry) += 1;
+ ASSERT(IndexEntry->Length >= sizeof(INDEX_ENTRY_ATTRIBUTE));
+ IndexEntry = (PINDEX_ENTRY_ATTRIBUTE)((PCHAR)IndexEntry + IndexEntry->Length);
+ }
+
+ ExFreePoolWithTag(IndexRecord, TAG_NTFS);
+
+ return STATUS_OBJECT_PATH_NOT_FOUND;
+}
+
NTSTATUS
BrowseIndexEntries(PDEVICE_EXTENSION Vcb,
PFILE_RECORD_HEADER MftRecord,
- PCHAR IndexRecord,
+ PINDEX_ROOT_ATTRIBUTE IndexRecord,
ULONG IndexBlockSize,
PINDEX_ENTRY_ATTRIBUTE FirstEntry,
PINDEX_ENTRY_ATTRIBUTE LastEntry,
ULONGLONG *OutMFTIndex)
{
NTSTATUS Status;
- ULONG RecordOffset;
PINDEX_ENTRY_ATTRIBUTE IndexEntry;
- PNTFS_ATTR_CONTEXT IndexAllocationCtx;
- ULONGLONG IndexAllocationSize;
- PINDEX_BUFFER IndexBuffer;
+ PNTFS_ATTR_CONTEXT IndexAllocationContext;
+ PNTFS_ATTR_CONTEXT BitmapContext;
+ PCHAR *BitmapMem;
+ ULONG *BitmapPtr;
+ RTL_BITMAP Bitmap;
DPRINT("BrowseIndexEntries(%p, %p, %p, %lu, %p, %p, %wZ, %lu, %lu, %s, %s, %p)\n",
Vcb,
CaseSensitive ? "TRUE" : "FALSE",
OutMFTIndex);
+ // Find the $I30 index allocation, if there is one
+ Status = FindAttribute(Vcb, MftRecord, AttributeIndexAllocation, L"$I30", 4, &IndexAllocationContext, NULL);
+ if (NT_SUCCESS(Status))
+ {
+ ULONGLONG BitmapLength;
+ // Find the bitmap attribute for the index
+ Status = FindAttribute(Vcb, MftRecord, AttributeBitmap, L"$I30", 4, &BitmapContext, NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Potential file system corruption detected!\n");
+ ReleaseAttributeContext(IndexAllocationContext);
+ return Status;
+ }
+
+ // Get the length of the bitmap attribute
+ BitmapLength = AttributeDataLength(BitmapContext->pRecord);
+
+ // Allocate memory for the bitmap, including some padding; RtlInitializeBitmap() wants a pointer
+ // that's ULONG-aligned, and it wants the size of the memory allocated for it to be a ULONG-multiple.
+ BitmapMem = ExAllocatePoolWithTag(NonPagedPool, BitmapLength + sizeof(ULONG), TAG_NTFS);
+ if (!BitmapMem)
+ {
+ DPRINT1("Error: failed to allocate bitmap!");
+ ReleaseAttributeContext(BitmapContext);
+ ReleaseAttributeContext(IndexAllocationContext);
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ RtlZeroMemory(BitmapMem, BitmapLength + sizeof(ULONG));
+
+ // RtlInitializeBitmap() wants a pointer that's ULONG-aligned.
+ BitmapPtr = (PULONG)ALIGN_UP_BY((ULONG_PTR)BitmapMem, sizeof(ULONG));
+
+ // Read the existing bitmap data
+ Status = ReadAttribute(Vcb, BitmapContext, 0, (PCHAR)BitmapPtr, BitmapLength);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Failed to read bitmap attribute!\n");
+ ExFreePoolWithTag(BitmapMem, TAG_NTFS);
+ ReleaseAttributeContext(BitmapContext);
+ ReleaseAttributeContext(IndexAllocationContext);
+ return Status;
+ }
+
+ // Initialize bitmap
+ RtlInitializeBitMap(&Bitmap, BitmapPtr, BitmapLength * 8);
+ }
+ else
+ {
+ // Couldn't find an index allocation
+ IndexAllocationContext = NULL;
+ }
+
+
+ // Loop through all Index Entries of index, starting with FirstEntry
IndexEntry = FirstEntry;
- while (IndexEntry < LastEntry &&
- !(IndexEntry->Flags & NTFS_INDEX_ENTRY_END))
+ while (IndexEntry <= LastEntry)
{
+ // Does IndexEntry have a sub-node?
+ if (IndexEntry->Flags & NTFS_INDEX_ENTRY_NODE)
+ {
+ if (!(IndexRecord->Header.Flags & INDEX_ROOT_LARGE) || !IndexAllocationContext)
+ {
+ DPRINT1("Filesystem corruption detected!\n");
+ }
+ else
+ {
+ Status = BrowseSubNodeIndexEntries(Vcb,
+ MftRecord,
+ IndexBlockSize,
+ FileName,
+ IndexAllocationContext,
+ &Bitmap,
+ GetIndexEntryVCN(IndexEntry),
+ StartEntry,
+ CurrentEntry,
+ DirSearch,
+ CaseSensitive,
+ OutMFTIndex);
+ if (NT_SUCCESS(Status))
+ {
+ ExFreePoolWithTag(BitmapMem, TAG_NTFS);
+ ReleaseAttributeContext(BitmapContext);
+ ReleaseAttributeContext(IndexAllocationContext);
+ return Status;
+ }
+ }
+ }
+
+ // Are we done?
+ if (IndexEntry->Flags & NTFS_INDEX_ENTRY_END)
+ break;
+
+ // If we've found a file whose index is greater than or equal to StartEntry that matches the search criteria
if ((IndexEntry->Data.Directory.IndexedFile & NTFS_MFT_MASK) >= NTFS_FILE_FIRST_USER_FILE &&
*CurrentEntry >= *StartEntry &&
IndexEntry->FileName.NameType != NTFS_FILE_NAME_DOS &&
{
*StartEntry = *CurrentEntry;
*OutMFTIndex = (IndexEntry->Data.Directory.IndexedFile & NTFS_MFT_MASK);
+ if (IndexAllocationContext)
+ {
+ ExFreePoolWithTag(BitmapMem, TAG_NTFS);
+ ReleaseAttributeContext(BitmapContext);
+ ReleaseAttributeContext(IndexAllocationContext);
+ }
return STATUS_SUCCESS;
}
+ // Advance to the next index entry
(*CurrentEntry) += 1;
ASSERT(IndexEntry->Length >= sizeof(INDEX_ENTRY_ATTRIBUTE));
IndexEntry = (PINDEX_ENTRY_ATTRIBUTE)((PCHAR)IndexEntry + IndexEntry->Length);
}
- /* If we're already browsing a subnode */
- if (IndexRecord == NULL)
- {
- return STATUS_OBJECT_PATH_NOT_FOUND;
- }
-
- /* If there's no subnode */
- if (!(IndexEntry->Flags & NTFS_INDEX_ENTRY_NODE))
- {
- return STATUS_OBJECT_PATH_NOT_FOUND;
- }
-
- Status = FindAttribute(Vcb, MftRecord, AttributeIndexAllocation, L"$I30", 4, &IndexAllocationCtx, NULL);
- if (!NT_SUCCESS(Status))
- {
- DPRINT1("Corrupted filesystem!\n");
- return Status;
- }
-
- IndexAllocationSize = AttributeDataLength(IndexAllocationCtx->pRecord);
- Status = STATUS_OBJECT_PATH_NOT_FOUND;
- for (RecordOffset = 0; RecordOffset < IndexAllocationSize; RecordOffset += IndexBlockSize)
+ if (IndexAllocationContext)
{
- ReadAttribute(Vcb, IndexAllocationCtx, RecordOffset, IndexRecord, IndexBlockSize);
- Status = FixupUpdateSequenceArray(Vcb, &((PFILE_RECORD_HEADER)IndexRecord)->Ntfs);
- if (!NT_SUCCESS(Status))
- {
- break;
- }
-
- IndexBuffer = (PINDEX_BUFFER)IndexRecord;
- ASSERT(IndexBuffer->Ntfs.Type == NRH_INDX_TYPE);
- ASSERT(IndexBuffer->Header.AllocatedSize + FIELD_OFFSET(INDEX_BUFFER, Header) == IndexBlockSize);
- FirstEntry = (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)&IndexBuffer->Header + IndexBuffer->Header.FirstEntryOffset);
- LastEntry = (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)&IndexBuffer->Header + IndexBuffer->Header.TotalSizeOfEntries);
- ASSERT(LastEntry <= (PINDEX_ENTRY_ATTRIBUTE)((ULONG_PTR)IndexBuffer + IndexBlockSize));
-
- Status = BrowseIndexEntries(NULL,
- NULL,
- NULL,
- 0,
- FirstEntry,
- LastEntry,
- FileName,
- StartEntry,
- CurrentEntry,
- DirSearch,
- CaseSensitive,
- OutMFTIndex);
- if (NT_SUCCESS(Status))
- {
- break;
- }
+ ExFreePoolWithTag(BitmapMem, TAG_NTFS);
+ ReleaseAttributeContext(BitmapContext);
+ ReleaseAttributeContext(IndexAllocationContext);
}
- ReleaseAttributeContext(IndexAllocationCtx);
- return Status;
+ return STATUS_OBJECT_PATH_NOT_FOUND;
}
NTSTATUS
CaseSensitive ? "TRUE" : "FALSE",
OutMFTIndex);
- MftRecord = ExAllocatePoolWithTag(NonPagedPool,
- Vcb->NtfsInfo.BytesPerFileRecord,
- TAG_NTFS);
+ MftRecord = ExAllocateFromNPagedLookasideList(&Vcb->FileRecLookasideList);
if (MftRecord == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
Status = ReadFileRecord(Vcb, MFTIndex, MftRecord);
if (!NT_SUCCESS(Status))
{
- ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MftRecord);
return Status;
}
Status = FindAttribute(Vcb, MftRecord, AttributeIndexRoot, L"$I30", 4, &IndexRootCtx, NULL);
if (!NT_SUCCESS(Status))
{
- ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MftRecord);
return Status;
}
if (IndexRecord == NULL)
{
ReleaseAttributeContext(IndexRootCtx);
- ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MftRecord);
return STATUS_INSUFFICIENT_RESOURCES;
}
Status = BrowseIndexEntries(Vcb,
MftRecord,
- IndexRecord,
+ (PINDEX_ROOT_ATTRIBUTE)IndexRecord,
IndexRoot->SizeOfEntry,
IndexEntry,
IndexEntryEnd,
OutMFTIndex);
ExFreePoolWithTag(IndexRecord, TAG_NTFS);
- ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, MftRecord);
return Status;
}
FsRtlDissectName(Current, &Current, &Remaining);
}
- *FileRecord = ExAllocatePoolWithTag(NonPagedPool, Vcb->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
+ *FileRecord = ExAllocateFromNPagedLookasideList(&Vcb->FileRecLookasideList);
if (*FileRecord == NULL)
{
DPRINT("NtfsLookupFileAt: Can't allocate MFT record\n");
if (!NT_SUCCESS(Status))
{
DPRINT("NtfsLookupFileAt: Can't read MFT record\n");
- ExFreePoolWithTag(*FileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, *FileRecord);
return Status;
}
return NtfsLookupFileAt(Vcb, PathName, CaseSensitive, FileRecord, MFTIndex, NTFS_FILE_ROOT);
}
+void
+NtfsDumpData(ULONG_PTR Buffer, ULONG Length)
+{
+ ULONG i, j;
+
+ // dump binary data, 8 bytes at a time
+ for (i = 0; i < Length; i += 8)
+ {
+ // display current offset, in hex
+ DbgPrint("\t%03x\t", i);
+
+ // display hex value of each of the next 8 bytes
+ for (j = 0; j < 8; j++)
+ DbgPrint("%02x ", *(PUCHAR)(Buffer + i + j));
+ DbgPrint("\n");
+ }
+}
+
/**
* @name NtfsDumpFileRecord
* @implemented
return Status;
}
- *FileRecord = ExAllocatePoolWithTag(NonPagedPool, Vcb->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
+ *FileRecord = ExAllocateFromNPagedLookasideList(&Vcb->FileRecLookasideList);
if (*FileRecord == NULL)
{
DPRINT("NtfsFindFileAt: Can't allocate MFT record\n");
if (!NT_SUCCESS(Status))
{
DPRINT("NtfsFindFileAt: Can't read MFT record\n");
- ExFreePoolWithTag(*FileRecord, TAG_NTFS);
+ ExFreeToNPagedLookasideList(&Vcb->FileRecLookasideList, *FileRecord);
return Status;
}
projects / reactos.git / blobdiff