#define NDEBUG
#include <debug.h>
+static PCWSTR MftIdToName[] = {
+ L"$MFT",
+ L"$MFTMirr",
+ L"$LogFile",
+ L"$Volume",
+ L"AttrDef",
+ L".",
+ L"$Bitmap",
+ L"$Boot",
+ L"$BadClus",
+ L"$Quota",
+ L"$UpCase",
+ L"$Extended",
+};
+
/* FUNCTIONS ****************************************************************/
static
Fcb = pFileObject->FsContext;
ASSERT(Fcb);
+ if (Fcb->Flags & FCB_IS_VOLUME)
+ {
+ /* This is likely to be an opening by ID, return ourselves */
+ if (pRelativeFileName[0] == L'\\')
+ {
+ *pAbsoluteFilename = NULL;
+ return STATUS_SUCCESS;
+ }
+
+ return STATUS_INVALID_PARAMETER;
+ }
+
/* verify related object is a directory and target name
don't start with \. */
if (NtfsFCBIsDirectory(Fcb) == FALSE ||
}
+static
+NTSTATUS
+NtfsMoonWalkID(PDEVICE_EXTENSION DeviceExt,
+ ULONGLONG Id,
+ PUNICODE_STRING OutPath)
+{
+ NTSTATUS Status;
+ PFILE_RECORD_HEADER MftRecord;
+ PFILENAME_ATTRIBUTE FileName;
+ WCHAR FullPath[MAX_PATH];
+ ULONG WritePosition = MAX_PATH - 1;
+
+ DPRINT1("NtfsMoonWalkID(%p, %I64x, %p)\n", DeviceExt, Id, OutPath);
+
+ RtlZeroMemory(FullPath, sizeof(FullPath));
+ MftRecord = ExAllocatePoolWithTag(NonPagedPool,
+ DeviceExt->NtfsInfo.BytesPerFileRecord,
+ TAG_NTFS);
+ if (MftRecord == NULL)
+ {
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ while (TRUE)
+ {
+ Status = ReadFileRecord(DeviceExt, Id, MftRecord);
+ if (!NT_SUCCESS(Status))
+ break;
+
+ ASSERT(MftRecord->Ntfs.Type == NRH_FILE_TYPE);
+ if (!(MftRecord->Flags & FRH_IN_USE))
+ {
+ Status = STATUS_OBJECT_PATH_NOT_FOUND;
+ break;
+ }
+
+ FileName = GetBestFileNameFromRecord(MftRecord);
+ if (FileName == NULL)
+ {
+ DPRINT1("$FILE_NAME attribute not found for %I64x\n", Id);
+ Status = STATUS_OBJECT_PATH_NOT_FOUND;
+ break;
+ }
+
+ WritePosition -= FileName->NameLength;
+ ASSERT(WritePosition < MAX_PATH);
+ RtlCopyMemory(FullPath + WritePosition, FileName->Name, FileName->NameLength * sizeof(WCHAR));
+ WritePosition -= 1;
+ ASSERT(WritePosition < MAX_PATH);
+ FullPath[WritePosition] = L'\\';
+
+ Id = FileName->DirectoryFileReferenceNumber & NTFS_MFT_MASK;
+ if (Id == NTFS_FILE_ROOT)
+ break;
+ }
+
+ ExFreePoolWithTag(MftRecord, TAG_NTFS);
+
+ if (!NT_SUCCESS(Status))
+ return Status;
+
+ OutPath->Length = (MAX_PATH - WritePosition - 1) * sizeof(WCHAR);
+ OutPath->MaximumLength = (MAX_PATH - WritePosition) * sizeof(WCHAR);
+ OutPath->Buffer = ExAllocatePoolWithTag(NonPagedPool, OutPath->MaximumLength, TAG_NTFS);
+ if (OutPath->Buffer == NULL)
+ {
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+ RtlCopyMemory(OutPath->Buffer, FullPath + WritePosition, OutPath->MaximumLength);
+
+ return Status;
+}
+
+static
+NTSTATUS
+NtfsOpenFileById(PDEVICE_EXTENSION DeviceExt,
+ PFILE_OBJECT FileObject,
+ ULONGLONG MftId,
+ PNTFS_FCB * FoundFCB)
+{
+ NTSTATUS Status;
+ PNTFS_FCB FCB;
+ PFILE_RECORD_HEADER MftRecord;
+
+ DPRINT1("NtfsOpenFileById(%p, %p, %I64x, %p)\n", DeviceExt, FileObject, MftId, FoundFCB);
+
+ ASSERT(MftId < 0x10);
+ if (MftId > 0xb) /* No entries are used yet beyond this */
+ {
+ return STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+
+ MftRecord = ExAllocatePoolWithTag(NonPagedPool,
+ DeviceExt->NtfsInfo.BytesPerFileRecord,
+ TAG_NTFS);
+ if (MftRecord == NULL)
+ {
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ Status = ReadFileRecord(DeviceExt, MftId, MftRecord);
+ if (!NT_SUCCESS(Status))
+ {
+ ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ return Status;
+ }
+
+ if (!(MftRecord->Flags & FRH_IN_USE))
+ {
+ ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ return STATUS_OBJECT_PATH_NOT_FOUND;
+ }
+
+ FCB = NtfsGrabFCBFromTable(DeviceExt, MftIdToName[MftId]);
+ if (FCB == NULL)
+ {
+ UNICODE_STRING Name;
+
+ RtlInitUnicodeString(&Name, MftIdToName[MftId]);
+ Status = NtfsMakeFCBFromDirEntry(DeviceExt, NULL, &Name, MftRecord, MftId, &FCB);
+ if (!NT_SUCCESS(Status))
+ {
+ ExFreePoolWithTag(MftRecord, TAG_NTFS);
+ return Status;
+ }
+ }
+
+ ASSERT(FCB != NULL);
+
+ ExFreePoolWithTag(MftRecord, TAG_NTFS);
+
+ Status = NtfsAttachFCBToFileObject(DeviceExt,
+ FCB,
+ FileObject);
+ *FoundFCB = FCB;
+
+ return Status;
+}
+
/*
* FUNCTION: Opens a file
*/
NtfsOpenFile(PDEVICE_EXTENSION DeviceExt,
PFILE_OBJECT FileObject,
PWSTR FileName,
- BOOLEAN OpenById,
PNTFS_FCB * FoundFCB)
{
PNTFS_FCB ParentFcb;
NTSTATUS Status;
PWSTR AbsFileName = NULL;
- DPRINT1("NtfsOpenFile(%p, %p, %S, %u, %p)\n", DeviceExt, FileObject, (!OpenById ? FileName : NULL), OpenById, FoundFCB);
+ DPRINT1("NtfsOpenFile(%p, %p, %S, %p)\n", DeviceExt, FileObject, FileName, FoundFCB);
*FoundFCB = NULL;
- if (OpenById)
+ if (FileObject->RelatedFileObject)
{
- ULONGLONG Id = (*(PULONGLONG)FileName) & NTFS_MFT_MASK;
+ DPRINT("Converting relative filename to absolute filename\n");
- DPRINT1("Will attempt to open by id: %I64x\n", Id);
-
- Fcb = NtfsGrabFCBFromTableById(DeviceExt,
- Id);
- if (Fcb == NULL)
+ Status = NtfsMakeAbsoluteFilename(FileObject->RelatedFileObject,
+ FileName,
+ &AbsFileName);
+ if (AbsFileName) FileName = AbsFileName;
+ if (!NT_SUCCESS(Status))
{
- Status = NtfsGetFCBForFileById(DeviceExt,
- &Fcb,
- Id);
- if (!NT_SUCCESS (Status))
- {
- DPRINT("Could not make a new FCB, status: %x\n", Status);
-
- return Status;
- }
-
- Fcb->Flags |= FCB_IS_OPEN_BY_ID;
+ return Status;
}
}
- else
- {
- if (FileObject->RelatedFileObject)
- {
- DPRINT("Converting relative filename to absolute filename\n");
- Status = NtfsMakeAbsoluteFilename(FileObject->RelatedFileObject,
- FileName,
- &AbsFileName);
- FileName = AbsFileName;
- if (!NT_SUCCESS(Status))
- {
- return Status;
- }
-
- return STATUS_UNSUCCESSFUL;
- }
+ //FIXME: Get cannonical path name (remove .'s, ..'s and extra separators)
- //FIXME: Get cannonical path name (remove .'s, ..'s and extra separators)
+ DPRINT("PathName to open: %S\n", FileName);
- DPRINT("PathName to open: %S\n", FileName);
-
- /* try first to find an existing FCB in memory */
- DPRINT("Checking for existing FCB in memory\n");
- Fcb = NtfsGrabFCBFromTable(DeviceExt,
+ /* try first to find an existing FCB in memory */
+ DPRINT("Checking for existing FCB in memory\n");
+ Fcb = NtfsGrabFCBFromTable(DeviceExt,
+ FileName);
+ if (Fcb == NULL)
+ {
+ DPRINT("No existing FCB found, making a new one if file exists.\n");
+ Status = NtfsGetFCBForFile(DeviceExt,
+ &ParentFcb,
+ &Fcb,
FileName);
- if (Fcb == NULL)
+ if (ParentFcb != NULL)
{
- DPRINT("No existing FCB found, making a new one if file exists.\n");
- Status = NtfsGetFCBForFile(DeviceExt,
- &ParentFcb,
- &Fcb,
- FileName);
- if (ParentFcb != NULL)
- {
- NtfsReleaseFCB(DeviceExt,
- ParentFcb);
- }
+ NtfsReleaseFCB(DeviceExt,
+ ParentFcb);
+ }
- if (!NT_SUCCESS (Status))
- {
- DPRINT("Could not make a new FCB, status: %x\n", Status);
+ if (!NT_SUCCESS (Status))
+ {
+ DPRINT("Could not make a new FCB, status: %x\n", Status);
- if (AbsFileName)
- ExFreePool(AbsFileName);
+ if (AbsFileName)
+ ExFreePool(AbsFileName);
- return Status;
- }
+ return Status;
}
}
PFILE_OBJECT FileObject;
ULONG RequestedDisposition;
ULONG RequestedOptions;
- PNTFS_FCB Fcb;
+ PNTFS_FCB Fcb = NULL;
// PWSTR FileName;
NTSTATUS Status;
+ UNICODE_STRING FullPath;
DPRINT1("NtfsCreateFile(%p, %p) called\n", DeviceObject, Irp);
return STATUS_INVALID_PARAMETER;
}
- if (RequestedOptions & FILE_OPEN_BY_FILE_ID)
- {
- UNIMPLEMENTED;
- return STATUS_NOT_IMPLEMENTED;
- }
-
FileObject = Stack->FileObject;
if (RequestedDisposition == FILE_CREATE ||
return STATUS_ACCESS_DENIED;
}
- if ((RequestedOptions & FILE_OPEN_BY_FILE_ID) == FILE_OPEN_BY_FILE_ID &&
- FileObject->FileName.Length != sizeof(ULONGLONG))
+ if ((RequestedOptions & FILE_OPEN_BY_FILE_ID) == FILE_OPEN_BY_FILE_ID)
{
- return STATUS_INVALID_PARAMETER;
+ ULONGLONG MFTId;
+
+ if (FileObject->FileName.Length != sizeof(ULONGLONG))
+ return STATUS_INVALID_PARAMETER;
+
+ MFTId = (*(PULONGLONG)FileObject->FileName.Buffer) & NTFS_MFT_MASK;
+ if (MFTId < 0x10)
+ {
+ Status = NtfsOpenFileById(DeviceExt, FileObject, MFTId, &Fcb);
+ }
+ else
+ {
+ Status = NtfsMoonWalkID(DeviceExt, MFTId, &FullPath);
+ }
+
+ if (!NT_SUCCESS(Status))
+ {
+ return Status;
+ }
+
+ DPRINT1("Open by ID: %I64x -> %wZ\n", (*(PULONGLONG)FileObject->FileName.Buffer) & NTFS_MFT_MASK, &FullPath);
}
/* This a open operation for the volume itself */
return STATUS_SUCCESS;
}
- Status = NtfsOpenFile(DeviceExt,
- FileObject,
- FileObject->FileName.Buffer,
- ((RequestedOptions & FILE_OPEN_BY_FILE_ID) == FILE_OPEN_BY_FILE_ID),
- &Fcb);
+ if (Fcb == NULL)
+ {
+ Status = NtfsOpenFile(DeviceExt,
+ FileObject,
+ ((RequestedOptions & FILE_OPEN_BY_FILE_ID) ? FullPath.Buffer : FileObject->FileName.Buffer),
+ &Fcb);
+
+ if (RequestedOptions & FILE_OPEN_BY_FILE_ID)
+ {
+ ExFreePoolWithTag(FullPath.Buffer, TAG_NTFS);
+ }
+ }
if (NT_SUCCESS(Status))
{
* fail immediately
*/
Irp->IoStatus.Information = (NT_SUCCESS(Status)) ? FILE_OPENED : 0;
- Irp->IoStatus.Status = Status;
return Status;
}
NTSTATUS
-NTAPI
-NtfsFsdCreate(PDEVICE_OBJECT DeviceObject,
- PIRP Irp)
+NtfsCreate(PNTFS_IRP_CONTEXT IrpContext)
{
PDEVICE_EXTENSION DeviceExt;
NTSTATUS Status;
+ PDEVICE_OBJECT DeviceObject;
+ DeviceObject = IrpContext->DeviceObject;
if (DeviceObject == NtfsGlobalData->DeviceObject)
{
/* DeviceObject represents FileSystem instead of logical volume */
DPRINT("Opening file system\n");
- Irp->IoStatus.Information = FILE_OPENED;
- Status = STATUS_SUCCESS;
- goto ByeBye;
+ IrpContext->Irp->IoStatus.Information = FILE_OPENED;
+ return STATUS_SUCCESS;
}
DeviceExt = DeviceObject->DeviceExtension;
- FsRtlEnterFileSystem();
+ if (!(IrpContext->Flags & IRPCONTEXT_CANWAIT))
+ {
+ return NtfsMarkIrpContextForQueue(IrpContext);
+ }
+
ExAcquireResourceExclusiveLite(&DeviceExt->DirResource,
TRUE);
Status = NtfsCreateFile(DeviceObject,
- Irp);
+ IrpContext->Irp);
ExReleaseResourceLite(&DeviceExt->DirResource);
- FsRtlExitFileSystem();
-
-ByeBye:
- Irp->IoStatus.Status = Status;
- IoCompleteRequest(Irp,
- NT_SUCCESS(Status) ? IO_DISK_INCREMENT : IO_NO_INCREMENT);
return Status;
}
projects / reactos.git / blobdiff