* Valentin Verkhovsky
* Pierre Schweitzer (pierre@reactos.org)
* Hervé Poussineau (hpoussin@reactos.org)
+ * Trevor Thompson
*/
/* INCLUDES *****************************************************************/
#include "ntfs.h"
#define NDEBUG
+#undef NDEBUG
#include <debug.h>
/* FUNCTIONS ****************************************************************/
}
+/**
+* @name FindAttribute
+* @implemented
+*
+* Searches a file record for an attribute matching the given type and name.
+*
+* @param Offset
+* Optional pointer to a ULONG that will receive the offset of the found attribute
+* from the beginning of the record. Can be set to NULL.
+*/
NTSTATUS
FindAttribute(PDEVICE_EXTENSION Vcb,
PFILE_RECORD_HEADER MftRecord,
ULONG Type,
PCWSTR Name,
ULONG NameLength,
- PNTFS_ATTR_CONTEXT * AttrCtx)
+ PNTFS_ATTR_CONTEXT * AttrCtx,
+ PULONG Offset)
{
BOOLEAN Found;
NTSTATUS Status;
/* Found it, fill up the context and return. */
DPRINT("Found context\n");
*AttrCtx = PrepareAttributeContext(Attribute);
+
+ (*AttrCtx)->FileMFTIndex = MftRecord->MFTRecordNumber;
+
+ if (Offset != NULL)
+ *Offset = Context.Offset;
+
FindCloseAttribute(&Context);
return STATUS_SUCCESS;
}
}
-ULONG
+ULONGLONG
AttributeAllocatedLength(PNTFS_ATTR_RECORD AttrRecord)
{
if (AttrRecord->IsNonResident)
return AttrRecord->Resident.ValueLength;
}
+void
+InternalSetResidentAttributeLength(PNTFS_ATTR_CONTEXT AttrContext,
+ PFILE_RECORD_HEADER FileRecord,
+ ULONG AttrOffset,
+ ULONG DataSize)
+{
+ ULONG EndMarker = AttributeEnd;
+ ULONG FinalMarker = FILE_RECORD_END;
+ ULONG NextAttributeOffset;
+ ULONG Offset;
+ USHORT Padding;
+
+ DPRINT("InternalSetResidentAttributeLength( %p, %p, %lu, %lu )\n", AttrContext, FileRecord, AttrOffset, DataSize);
+
+ // update ValueLength Field
+ AttrContext->Record.Resident.ValueLength = DataSize;
+ Offset = AttrOffset + FIELD_OFFSET(NTFS_ATTR_RECORD, Resident.ValueLength);
+ RtlCopyMemory((PCHAR)FileRecord + Offset, &DataSize, sizeof(ULONG));
+
+ // calculate the record length and end marker offset
+ AttrContext->Record.Length = DataSize + AttrContext->Record.Resident.ValueOffset;
+ NextAttributeOffset = AttrOffset + AttrContext->Record.Length;
+
+ // Ensure NextAttributeOffset is aligned to an 8-byte boundary
+ if (NextAttributeOffset % 8 != 0)
+ {
+ Padding = 8 - (NextAttributeOffset % 8);
+ NextAttributeOffset += Padding;
+ AttrContext->Record.Length += Padding;
+ }
+
+ // update the record length
+ Offset = AttrOffset + FIELD_OFFSET(NTFS_ATTR_RECORD, Length);
+ RtlCopyMemory((PCHAR)FileRecord + Offset, &AttrContext->Record.Length, sizeof(ULONG));
+
+ // write the end marker
+ RtlCopyMemory((PCHAR)FileRecord + NextAttributeOffset, &EndMarker, sizeof(ULONG));
+
+ // write the final marker
+ Offset = NextAttributeOffset + sizeof(ULONG);
+ RtlCopyMemory((PCHAR)FileRecord + Offset, &FinalMarker, sizeof(ULONG));
+
+ FileRecord->BytesInUse = Offset + sizeof(ULONG);
+}
+
+NTSTATUS
+SetAttributeDataLength(PFILE_OBJECT FileObject,
+ PNTFS_FCB Fcb,
+ PNTFS_ATTR_CONTEXT AttrContext,
+ ULONG AttrOffset,
+ PFILE_RECORD_HEADER FileRecord,
+ PLARGE_INTEGER DataSize)
+{
+ NTSTATUS Status = STATUS_SUCCESS;
+
+ // are we truncating the file?
+ if (DataSize->QuadPart < AttributeDataLength(&AttrContext->Record)
+ {
+ if (!MmCanFileBeTruncated(FileObject->SectionObjectPointer, (PLARGE_INTEGER)&AllocationSize))
+ {
+ DPRINT1("Can't truncate a memory-mapped file!\n");
+ return STATUS_USER_MAPPED_FILE;
+ }
+ }
+
+ if (AttrContext->Record.IsNonResident)
+ {
+ ULONG BytesPerCluster = Fcb->Vcb->NtfsInfo.BytesPerCluster;
+ ULONGLONG AllocationSize = ROUND_UP(DataSize->QuadPart, BytesPerCluster);
+
+ // do we need to increase the allocation size?
+ if (AttrContext->Record.NonResident.AllocatedSize < AllocationSize)
+ {
+ ULONG ExistingClusters = AttrContext->Record.NonResident.AllocatedSize / BytesPerCluster;
+ ULONG ClustersNeeded = (AllocationSize / BytesPerCluster) - ExistingClusters;
+ LARGE_INTEGER LastClusterInDataRun;
+ ULONG NextAssignedCluster;
+ ULONG AssignedClusters;
+
+ NTSTATUS Status = GetLastClusterInDataRun(Fcb->Vcb, &AttrContext->Record, &LastClusterInDataRun.QuadPart);
+
+ DPRINT1("GetLastClusterInDataRun returned: %I64u\n", LastClusterInDataRun.QuadPart);
+ DPRINT1("Highest VCN of record: %I64u\n", AttrContext->Record.NonResident.HighestVCN);
+
+ while (ClustersNeeded > 0)
+ {
+ Status = NtfsAllocateClusters(Fcb->Vcb,
+ LastClusterInDataRun.LowPart + 1,
+ ClustersNeeded,
+ &NextAssignedCluster,
+ &AssignedClusters);
+
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Error: Unable to allocate requested clusters!\n");
+ return Status;
+ }
+
+ // now we need to add the clusters we allocated to the data run
+ Status = AddRun(AttrContext, NextAssignedCluster, AssignedClusters);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Error: Unable to add data run!\n");
+ return Status;
+ }
+
+ ClustersNeeded -= AssignedClusters;
+ LastClusterInDataRun.LowPart = NextAssignedCluster + AssignedClusters - 1;
+ }
+
+ DPRINT1("FixMe: Increasing allocation size is unimplemented!\n");
+ return STATUS_NOT_IMPLEMENTED;
+ }
+
+ // TODO: is the file compressed, encrypted, or sparse?
+
+ // NOTE: we need to have acquired the main resource exclusively, as well as(?) the PagingIoResource
+
+ // TODO: update the allocated size on-disk
+ DPRINT("Allocated Size: %I64u\n", AttrContext->Record.NonResident.AllocatedSize);
+
+ AttrContext->Record.NonResident.DataSize = DataSize->QuadPart;
+ AttrContext->Record.NonResident.InitializedSize = DataSize->QuadPart;
+
+ // copy the attribute record back into the FileRecord
+ RtlCopyMemory((PCHAR)FileRecord + AttrOffset, &AttrContext->Record, AttrContext->Record.Length);
+ }
+ else
+ {
+ // resident attribute
+
+ // find the next attribute
+ ULONG NextAttributeOffset = AttrOffset + AttrContext->Record.Length;
+ PNTFS_ATTR_RECORD NextAttribute = (PNTFS_ATTR_RECORD)((PCHAR)FileRecord + NextAttributeOffset);
+
+ //NtfsDumpFileAttributes(Fcb->Vcb, FileRecord);
+
+ // Do we need to increase the data length?
+ if (DataSize->QuadPart > AttrContext->Record.Resident.ValueLength)
+ {
+ // There's usually padding at the end of a record. Do we need to extend past it?
+ ULONG MaxValueLength = AttrContext->Record.Length - AttrContext->Record.Resident.ValueOffset;
+ if (MaxValueLength < DataSize->LowPart)
+ {
+ // If this is the last attribute, we could move the end marker to the very end of the file record
+ MaxValueLength += Fcb->Vcb->NtfsInfo.BytesPerFileRecord - NextAttributeOffset - (sizeof(ULONG) * 2);
+
+ if (MaxValueLength < DataSize->LowPart || NextAttribute->Type != AttributeEnd)
+ {
+ DPRINT1("FIXME: Need to convert attribute to non-resident!\n");
+ return STATUS_NOT_IMPLEMENTED;
+ }
+ }
+ }
+ else if (DataSize->LowPart < AttrContext->Record.Resident.ValueLength)
+ {
+ // we need to decrease the length
+ if (NextAttribute->Type != AttributeEnd)
+ {
+ DPRINT1("FIXME: Don't know how to decrease length of resident attribute unless it's the final attribute!\n");
+ return STATUS_NOT_IMPLEMENTED;
+ }
+ }
+
+ InternalSetResidentAttributeLength(AttrContext, FileRecord, AttrOffset, DataSize->LowPart);
+ }
+
+ //NtfsDumpFileAttributes(Fcb->Vcb, FileRecord);
+
+ // write the updated file record back to disk
+ Status = UpdateFileRecord(Fcb->Vcb, Fcb->MFTIndex, FileRecord);
+
+ if (NT_SUCCESS(Status))
+ {
+ Fcb->RFCB.FileSize = *DataSize;
+ Fcb->RFCB.ValidDataLength = *DataSize;
+ CcSetFileSizes(FileObject, (PCC_FILE_SIZES)&Fcb->RFCB.AllocationSize);
+ }
+
+ return STATUS_SUCCESS;
+}
ULONG
ReadAttribute(PDEVICE_EXTENSION Vcb,
}
else
DataRunStartLCN = -1;
-
- if (*DataRun == 0)
- return AlreadyRead;
}
while (Length > 0)
}
+/**
+* @name WriteAttribute
+* @implemented
+*
+* Writes an NTFS attribute to the disk. It presently borrows a lot of code from ReadAttribute(),
+* and it still needs more documentation / cleaning up.
+*
+* @param Vcb
+* Volume Control Block indicating which volume to write the attribute to
+*
+* @param Context
+* Pointer to an NTFS_ATTR_CONTEXT that has information about the attribute
+*
+* @param Offset
+* Offset, in bytes, from the beginning of the attribute indicating where to start
+* writing data
+*
+* @param Buffer
+* The data that's being written to the device
+*
+* @param Length
+* How much data will be written, in bytes
+*
+* @param RealLengthWritten
+* Pointer to a ULONG which will receive how much data was written, in bytes
+*
+* @return
+* STATUS_SUCCESS if successful, an error code otherwise. STATUS_NOT_IMPLEMENTED if
+* writing to a sparse file.
+*
+* @remarks Note that in this context the word "attribute" isn't referring read-only, hidden,
+* etc. - the file's data is actually stored in an attribute in NTFS parlance.
+*
+*/
+
+NTSTATUS
+WriteAttribute(PDEVICE_EXTENSION Vcb,
+ PNTFS_ATTR_CONTEXT Context,
+ ULONGLONG Offset,
+ const PUCHAR Buffer,
+ ULONG Length,
+ PULONG RealLengthWritten)
+{
+ ULONGLONG LastLCN;
+ PUCHAR DataRun;
+ LONGLONG DataRunOffset;
+ ULONGLONG DataRunLength;
+ LONGLONG DataRunStartLCN;
+ ULONGLONG CurrentOffset;
+ ULONG WriteLength;
+ NTSTATUS Status;
+ PUCHAR SourceBuffer = Buffer;
+ LONGLONG StartingOffset;
+
+ DPRINT("WriteAttribute(%p, %p, %I64u, %p, %lu, %p)\n", Vcb, Context, Offset, Buffer, Length, RealLengthWritten);
+
+ *RealLengthWritten = 0;
+
+ // is this a resident attribute?
+ if (!Context->Record.IsNonResident)
+ {
+ ULONG AttributeOffset;
+ PNTFS_ATTR_CONTEXT FoundContext;
+ PFILE_RECORD_HEADER FileRecord;
+
+ if (Offset + Length > Context->Record.Resident.ValueLength)
+ {
+ DPRINT1("DRIVER ERROR: Attribute is too small!\n");
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ FileRecord = ExAllocatePoolWithTag(NonPagedPool, Vcb->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
+
+ if (!FileRecord)
+ {
+ DPRINT1("Error: Couldn't allocate file record!\n");
+ return STATUS_NO_MEMORY;
+ }
+
+ // read the file record
+ ReadFileRecord(Vcb, Context->FileMFTIndex, FileRecord);
+
+ // find where to write the attribute data to
+ Status = FindAttribute(Vcb, FileRecord,
+ Context->Record.Type,
+ (PCWSTR)((PCHAR)&Context->Record + Context->Record.NameOffset),
+ Context->Record.NameLength,
+ &FoundContext,
+ &AttributeOffset);
+
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Couldn't find matching attribute!\n");
+ ExFreePoolWithTag(FileRecord, TAG_NTFS);
+ return Status;
+ }
+
+ DPRINT("Offset: %I64u, AttributeOffset: %u, ValueOffset: %u\n", Offset, AttributeOffset, Context->Record.Resident.ValueLength);
+ Offset += AttributeOffset + Context->Record.Resident.ValueOffset;
+
+ if (Offset + Length > Vcb->NtfsInfo.BytesPerFileRecord)
+ {
+ DPRINT1("DRIVER ERROR: Data being written extends past end of file record!\n");
+ ReleaseAttributeContext(FoundContext);
+ ExFreePoolWithTag(FileRecord, TAG_NTFS);
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ // copy the data being written into the file record
+ RtlCopyMemory((PCHAR)FileRecord + Offset, Buffer, Length);
+
+ Status = UpdateFileRecord(Vcb, Context->FileMFTIndex, FileRecord);
+
+ ReleaseAttributeContext(FoundContext);
+ ExFreePoolWithTag(FileRecord, TAG_NTFS);
+
+ if (NT_SUCCESS(Status))
+ *RealLengthWritten = Length;
+
+ return Status;
+ }
+
+ // This is a non-resident attribute.
+
+ // I. Find the corresponding start data run.
+
+ // FIXME: Cache seems to be non-working. Disable it for now
+ //if(Context->CacheRunOffset <= Offset && Offset < Context->CacheRunOffset + Context->CacheRunLength * Volume->ClusterSize)
+ /*if (0)
+ {
+ DataRun = Context->CacheRun;
+ LastLCN = Context->CacheRunLastLCN;
+ DataRunStartLCN = Context->CacheRunStartLCN;
+ DataRunLength = Context->CacheRunLength;
+ CurrentOffset = Context->CacheRunCurrentOffset;
+ }
+ else*/
+ {
+ LastLCN = 0;
+ DataRun = (PUCHAR)&Context->Record + Context->Record.NonResident.MappingPairsOffset;
+ CurrentOffset = 0;
+
+ while (1)
+ {
+ DataRun = DecodeRun(DataRun, &DataRunOffset, &DataRunLength);
+ if (DataRunOffset != -1)
+ {
+ // Normal data run.
+ // DPRINT1("Writing to normal data run, LastLCN %I64u DataRunOffset %I64d\n", LastLCN, DataRunOffset);
+ DataRunStartLCN = LastLCN + DataRunOffset;
+ LastLCN = DataRunStartLCN;
+ }
+ else
+ {
+ // Sparse data run. We can't support writing to sparse files yet
+ // (it may require increasing the allocation size).
+ DataRunStartLCN = -1;
+ DPRINT1("FIXME: Writing to sparse files is not supported yet!\n");
+ return STATUS_NOT_IMPLEMENTED;
+ }
+
+ // Have we reached the data run we're trying to write to?
+ if (Offset >= CurrentOffset &&
+ Offset < CurrentOffset + (DataRunLength * Vcb->NtfsInfo.BytesPerCluster))
+ {
+ break;
+ }
+
+ if (*DataRun == 0)
+ {
+ // We reached the last assigned cluster
+ // TODO: assign new clusters to the end of the file.
+ // (Presently, this code will never be reached, the write should have already failed by now)
+ return STATUS_END_OF_FILE;
+ }
+
+ CurrentOffset += DataRunLength * Vcb->NtfsInfo.BytesPerCluster;
+ }
+ }
+
+ // II. Go through the run list and write the data
+
+ /* REVIEWME -- As adapted from NtfsReadAttribute():
+ We seem to be making a special case for the first applicable data run, but I'm not sure why.
+ Does it have something to do with (not) caching? Is this strategy equally applicable to writing? */
+
+ WriteLength = (ULONG)min(DataRunLength * Vcb->NtfsInfo.BytesPerCluster - (Offset - CurrentOffset), Length);
+
+ StartingOffset = DataRunStartLCN * Vcb->NtfsInfo.BytesPerCluster + Offset - CurrentOffset;
+
+ // Write the data to the disk
+ Status = NtfsWriteDisk(Vcb->StorageDevice,
+ StartingOffset,
+ WriteLength,
+ Vcb->NtfsInfo.BytesPerSector,
+ (PVOID)SourceBuffer);
+
+ // Did the write fail?
+ if (!NT_SUCCESS(Status))
+ {
+ Context->CacheRun = DataRun;
+ Context->CacheRunOffset = Offset;
+ Context->CacheRunStartLCN = DataRunStartLCN;
+ Context->CacheRunLength = DataRunLength;
+ Context->CacheRunLastLCN = LastLCN;
+ Context->CacheRunCurrentOffset = CurrentOffset;
+
+ return Status;
+ }
+
+ Length -= WriteLength;
+ SourceBuffer += WriteLength;
+ *RealLengthWritten += WriteLength;
+
+ // Did we write to the end of the data run?
+ if (WriteLength == DataRunLength * Vcb->NtfsInfo.BytesPerCluster - (Offset - CurrentOffset))
+ {
+ // Advance to the next data run
+ CurrentOffset += DataRunLength * Vcb->NtfsInfo.BytesPerCluster;
+ DataRun = DecodeRun(DataRun, &DataRunOffset, &DataRunLength);
+
+ if (DataRunOffset != (ULONGLONG)-1)
+ {
+ DataRunStartLCN = LastLCN + DataRunOffset;
+ LastLCN = DataRunStartLCN;
+ }
+ else
+ DataRunStartLCN = -1;
+ }
+
+ // Do we have more data to write?
+ while (Length > 0)
+ {
+ // Make sure we don't write past the end of the current data run
+ WriteLength = (ULONG)min(DataRunLength * Vcb->NtfsInfo.BytesPerCluster, Length);
+
+ // Are we dealing with a sparse data run?
+ if (DataRunStartLCN == -1)
+ {
+ DPRINT1("FIXME: Don't know how to write to sparse files yet! (DataRunStartLCN == -1)\n");
+ return STATUS_NOT_IMPLEMENTED;
+ }
+ else
+ {
+ // write the data to the disk
+ Status = NtfsWriteDisk(Vcb->StorageDevice,
+ DataRunStartLCN * Vcb->NtfsInfo.BytesPerCluster,
+ WriteLength,
+ Vcb->NtfsInfo.BytesPerSector,
+ (PVOID)SourceBuffer);
+ if (!NT_SUCCESS(Status))
+ break;
+ }
+
+ Length -= WriteLength;
+ SourceBuffer += WriteLength;
+ *RealLengthWritten += WriteLength;
+
+ // We finished this request, but there's still data in this data run.
+ if (Length == 0 && WriteLength != DataRunLength * Vcb->NtfsInfo.BytesPerCluster)
+ break;
+
+ // Go to next run in the list.
+
+ if (*DataRun == 0)
+ {
+ // that was the last run
+ if (Length > 0)
+ {
+ // Failed sanity check.
+ DPRINT1("Encountered EOF before expected!\n");
+ return STATUS_END_OF_FILE;
+ }
+
+ break;
+ }
+
+ // Advance to the next data run
+ CurrentOffset += DataRunLength * Vcb->NtfsInfo.BytesPerCluster;
+ DataRun = DecodeRun(DataRun, &DataRunOffset, &DataRunLength);
+ if (DataRunOffset != -1)
+ {
+ // Normal data run.
+ DataRunStartLCN = LastLCN + DataRunOffset;
+ LastLCN = DataRunStartLCN;
+ }
+ else
+ {
+ // Sparse data run.
+ DataRunStartLCN = -1;
+ }
+ } // end while (Length > 0) [more data to write]
+
+ Context->CacheRun = DataRun;
+ Context->CacheRunOffset = Offset + *RealLengthWritten;
+ Context->CacheRunStartLCN = DataRunStartLCN;
+ Context->CacheRunLength = DataRunLength;
+ Context->CacheRunLastLCN = LastLCN;
+ Context->CacheRunCurrentOffset = CurrentOffset;
+
+ return Status;
+}
+
NTSTATUS
ReadFileRecord(PDEVICE_EXTENSION Vcb,
ULONGLONG index,
}
/* Apply update sequence array fixups. */
+ DPRINT("Sequence number: %u\n", file->SequenceNumber);
return FixupUpdateSequenceArray(Vcb, &file->Ntfs);
}
-NTSTATUS
+/**
+* Searches a file's parent directory (given the parent's index in the mft)
+* for the given file. Upon finding an index entry for that file, updates
+* Data Size and Allocated Size values in the $FILE_NAME attribute of that entry.
+*
+* (Most of this code was copied from NtfsFindMftRecord)
+*/
+NTSTATUS
+UpdateFileNameRecord(PDEVICE_EXTENSION Vcb,
+ ULONGLONG ParentMFTIndex,
+ PUNICODE_STRING FileName,
+ BOOLEAN DirSearch,
+ ULONGLONG NewDataSize,
+ ULONGLONG NewAllocationSize)
+{
+ PFILE_RECORD_HEADER MftRecord;
+ PNTFS_ATTR_CONTEXT IndexRootCtx;
+ PINDEX_ROOT_ATTRIBUTE IndexRoot;
+ PCHAR IndexRecord;
+ PINDEX_ENTRY_ATTRIBUTE IndexEntry, IndexEntryEnd;
+ NTSTATUS Status;
+ ULONG CurrentEntry = 0;
+
+ DPRINT("UpdateFileNameRecord(%p, %I64d, %wZ, %u, %I64u, %I64u)\n", Vcb, ParentMFTIndex, FileName, DirSearch, NewDataSize, NewAllocationSize);
+
+ MftRecord = ExAllocatePoolWithTag(NonPagedPool,
+ Vcb->NtfsInfo.BytesPerFileRecord,
+ TAG_NTFS);
+ if (MftRecord == NULL)
+ {
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ Status = ReadFileRecord(Vcb, ParentMFTIndex, MftRecord);
+ if (!NT_SUCCESS(Status))
+ {
+ ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ return Status;
+ }
+
+ ASSERT(MftRecord->Ntfs.Type == NRH_FILE_TYPE);
+ Status = FindAttribute(Vcb, MftRecord, AttributeIndexRoot, L"$I30", 4, &IndexRootCtx, NULL);
+ if (!NT_SUCCESS(Status))
+ {
+ ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ return Status;
+ }
+
+ IndexRecord = ExAllocatePoolWithTag(NonPagedPool, Vcb->NtfsInfo.BytesPerIndexRecord, TAG_NTFS);
+ if (IndexRecord == NULL)
+ {
+ ReleaseAttributeContext(IndexRootCtx);
+ ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ ReadAttribute(Vcb, IndexRootCtx, 0, IndexRecord, Vcb->NtfsInfo.BytesPerIndexRecord);
+ IndexRoot = (PINDEX_ROOT_ATTRIBUTE)IndexRecord;
+ IndexEntry = (PINDEX_ENTRY_ATTRIBUTE)((PCHAR)&IndexRoot->Header + IndexRoot->Header.FirstEntryOffset);
+ // Index root is always resident.
+ IndexEntryEnd = (PINDEX_ENTRY_ATTRIBUTE)(IndexRecord + IndexRoot->Header.TotalSizeOfEntries);
+
+ DPRINT("IndexRecordSize: %x IndexBlockSize: %x\n", Vcb->NtfsInfo.BytesPerIndexRecord, IndexRoot->SizeOfEntry);
+
+ Status = UpdateIndexEntryFileNameSize(Vcb,
+ MftRecord,
+ IndexRecord,
+ IndexRoot->SizeOfEntry,
+ IndexEntry,
+ IndexEntryEnd,
+ FileName,
+ &CurrentEntry,
+ &CurrentEntry,
+ DirSearch,
+ NewDataSize,
+ NewAllocationSize);
+
+ ReleaseAttributeContext(IndexRootCtx);
+ ExFreePoolWithTag(IndexRecord, TAG_NTFS);
+ ExFreePoolWithTag(MftRecord, TAG_NTFS);
+
+ return Status;
+}
+
+/**
+* Recursively searches directory index and applies the size update to the $FILE_NAME attribute of the
+* proper index entry.
+* (Heavily based on BrowseIndexEntries)
+*/
+NTSTATUS
+UpdateIndexEntryFileNameSize(PDEVICE_EXTENSION Vcb,
+ PFILE_RECORD_HEADER MftRecord,
+ PCHAR IndexRecord,
+ ULONG IndexBlockSize,
+ PINDEX_ENTRY_ATTRIBUTE FirstEntry,
+ PINDEX_ENTRY_ATTRIBUTE LastEntry,
+ PUNICODE_STRING FileName,
+ PULONG StartEntry,
+ PULONG CurrentEntry,
+ BOOLEAN DirSearch,
+ ULONGLONG NewDataSize,
+ ULONGLONG NewAllocatedSize)
+{
+ NTSTATUS Status;
+ ULONG RecordOffset;
+ PINDEX_ENTRY_ATTRIBUTE IndexEntry;
+ PNTFS_ATTR_CONTEXT IndexAllocationCtx;
+ ULONGLONG IndexAllocationSize;
+ PINDEX_BUFFER IndexBuffer;
+
+ DPRINT("UpdateIndexEntrySize(%p, %p, %p, %u, %p, %p, %wZ, %u, %u, %u, %I64u, %I64u)\n", Vcb, MftRecord, IndexRecord, IndexBlockSize, FirstEntry, LastEntry, FileName, *StartEntry, *CurrentEntry, DirSearch, NewDataSize, NewAllocatedSize);
+
+ // find the index entry responsible for the file we're trying to update
+ IndexEntry = FirstEntry;
+ while (IndexEntry < LastEntry &&
+ !(IndexEntry->Flags & NTFS_INDEX_ENTRY_END))
+ {
+ if ((IndexEntry->Data.Directory.IndexedFile & NTFS_MFT_MASK) > 0x10 &&
+ *CurrentEntry >= *StartEntry &&
+ IndexEntry->FileName.NameType != NTFS_FILE_NAME_DOS &&
+ CompareFileName(FileName, IndexEntry, DirSearch))
+ {
+ *StartEntry = *CurrentEntry;
+ IndexEntry->FileName.DataSize = NewDataSize;
+ IndexEntry->FileName.AllocatedSize = NewAllocatedSize;
+ // indicate that the caller will still need to write the structure to the disk
+ return STATUS_PENDING;
+ }
+
+ (*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))
+ {
+ DPRINT("Corrupted filesystem!\n");
+ return Status;
+ }
+
+ IndexAllocationSize = AttributeDataLength(&IndexAllocationCtx->Record);
+ Status = STATUS_OBJECT_PATH_NOT_FOUND;
+ for (RecordOffset = 0; RecordOffset < IndexAllocationSize; RecordOffset += IndexBlockSize)
+ {
+ 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 = UpdateIndexEntryFileNameSize(NULL, NULL, NULL, 0, FirstEntry, LastEntry, FileName, StartEntry, CurrentEntry, DirSearch, NewDataSize, NewAllocatedSize);
+ if (Status == STATUS_PENDING)
+ {
+ // write the index record back to disk
+ ULONG Written;
+
+ // first we need to update the fixup values for the index block
+ Status = AddFixupArray(Vcb, &((PFILE_RECORD_HEADER)IndexRecord)->Ntfs);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("Error: Failed to update fixup sequence array!\n");
+ break;
+ }
+
+ Status = WriteAttribute(Vcb, IndexAllocationCtx, RecordOffset, (const PUCHAR)IndexRecord, IndexBlockSize, &Written);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR Performing write!\n");
+ break;
+ }
+
+ Status = STATUS_SUCCESS;
+ break;
+ }
+ if (NT_SUCCESS(Status))
+ {
+ break;
+ }
+ }
+
+ ReleaseAttributeContext(IndexAllocationCtx);
+ return Status;
+}
+
+/**
+* UpdateFileRecord
+* @implemented
+* Writes a file record to the master file table, at a given index.
+*/
+NTSTATUS
+UpdateFileRecord(PDEVICE_EXTENSION Vcb,
+ ULONGLONG index,
+ PFILE_RECORD_HEADER file)
+{
+ ULONG BytesWritten;
+ NTSTATUS Status = STATUS_SUCCESS;
+
+ DPRINT("UpdateFileRecord(%p, %I64x, %p)\n", Vcb, index, file);
+
+ // Add the fixup array to prepare the data for writing to disk
+ AddFixupArray(Vcb, &file->Ntfs);
+
+ // write the file record to the master file table
+ Status = WriteAttribute(Vcb, Vcb->MFTContext, index * Vcb->NtfsInfo.BytesPerFileRecord, (const PUCHAR)file, Vcb->NtfsInfo.BytesPerFileRecord, &BytesWritten);
+
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("UpdateFileRecord failed: %I64u written, %u expected\n", BytesWritten, Vcb->NtfsInfo.BytesPerFileRecord);
+ }
+
+ return Status;
+}
+
+
+NTSTATUS
FixupUpdateSequenceArray(PDEVICE_EXTENSION Vcb,
PNTFS_RECORD_HEADER Record)
{
USACount = Record->UsaCount - 1; /* Exclude the USA Number. */
Block = (USHORT*)((PCHAR)Record + Vcb->NtfsInfo.BytesPerSector - 2);
+ DPRINT("FixupUpdateSequenceArray(%p, %p)\nUSANumber: %u\tUSACount: %u\n", Vcb, Record, USANumber, USACount);
+
while (USACount)
{
if (*Block != USANumber)
return STATUS_SUCCESS;
}
+NTSTATUS
+AddFixupArray(PDEVICE_EXTENSION Vcb,
+ PNTFS_RECORD_HEADER Record)
+{
+ USHORT *pShortToFixUp;
+ unsigned int ArrayEntryCount = Record->UsaCount - 1;
+ unsigned int Offset = Vcb->NtfsInfo.BytesPerSector - 2;
+ int i;
+
+ PFIXUP_ARRAY fixupArray = (PFIXUP_ARRAY)((UCHAR*)Record + Record->UsaOffset);
+
+ DPRINT("AddFixupArray(%p, %p)\n fixupArray->USN: %u, ArrayEntryCount: %u\n", Vcb, Record, fixupArray->USN, ArrayEntryCount);
+
+ fixupArray->USN++;
+
+ for (i = 0; i < ArrayEntryCount; i++)
+ {
+ DPRINT("USN: %u\tOffset: %u\n", fixupArray->USN, Offset);
+
+ pShortToFixUp = (USHORT*)((PCHAR)Record + Offset);
+ fixupArray->Array[i] = *pShortToFixUp;
+ *pShortToFixUp = fixupArray->USN;
+ Offset += Vcb->NtfsInfo.BytesPerSector;
+ }
+
+ return STATUS_SUCCESS;
+}
NTSTATUS
ReadLCN(PDEVICE_EXTENSION Vcb,
return STATUS_OBJECT_PATH_NOT_FOUND;
}
- Status = FindAttribute(Vcb, MftRecord, AttributeIndexAllocation, L"$I30", 4, &IndexAllocationCtx);
+ Status = FindAttribute(Vcb, MftRecord, AttributeIndexAllocation, L"$I30", 4, &IndexAllocationCtx, NULL);
if (!NT_SUCCESS(Status))
{
DPRINT("Corrupted filesystem!\n");
}
ASSERT(MftRecord->Ntfs.Type == NRH_FILE_TYPE);
- Status = FindAttribute(Vcb, MftRecord, AttributeIndexRoot, L"$I30", 4, &IndexRootCtx);
+ Status = FindAttribute(Vcb, MftRecord, AttributeIndexRoot, L"$I30", 4, &IndexRootCtx, NULL);
if (!NT_SUCCESS(Status))
{
ExFreePoolWithTag(MftRecord, TAG_NTFS);
projects / reactos.git / blobdiff