--- /dev/null
+/*
+ * ReactOS kernel
+ * Copyright (C) 2003 ReactOS Team
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/* $Id$
+ *
+ * COPYRIGHT: See COPYING in the top level directory
+ * PROJECT: ReactOS kernel
+ * FILE: drivers/fs/fs_rec/udfs.c
+ * PURPOSE: Filesystem recognizer driver
+ * PROGRAMMER: Eric Kohl
+ */
+
+/* INCLUDES *****************************************************************/
+
+#include <ddk/ntddk.h>
+
+#define NDEBUG
+#include <debug.h>
+
+#include "fs_rec.h"
+
+
+#define UDFS_VRS_START_SECTOR 16
+#define UDFS_AVDP_SECTOR 256
+
+/* TYPES ********************************************************************/
+
+typedef struct _TAG
+{
+ USHORT Identifier;
+ USHORT Version;
+ UCHAR Checksum;
+ UCHAR Reserved;
+ USHORT SerialNumber;
+ USHORT Crc;
+ USHORT CrcLength;
+ ULONG Location;
+} PACKED TAG, *PTAG;
+
+typedef struct _EXTENT
+{
+ ULONG Length;
+ ULONG Location;
+} PACKED EXTENT, *PEXTENT;
+
+typedef struct _AVDP
+{
+ TAG DescriptorTag;
+ EXTENT MainVolumeDescriptorExtent;
+ EXTENT ReserveVolumeDescriptorExtent;
+} PACKED AVDP, *PAVDP;
+
+/* FUNCTIONS ****************************************************************/
+
+static NTSTATUS
+FsRecCheckVolumeRecognitionSequence(IN PDEVICE_OBJECT DeviceObject,
+ IN ULONG SectorSize)
+{
+ PUCHAR Buffer;
+ ULONG Sector;
+ NTSTATUS Status;
+ ULONG State;
+
+ Buffer = ExAllocatePool(NonPagedPool,
+ SectorSize);
+ if (Buffer == NULL)
+ {
+ return(STATUS_INSUFFICIENT_RESOURCES);
+ }
+
+ State = 0;
+ Sector = UDFS_VRS_START_SECTOR;
+ while (TRUE)
+ {
+ Status = FsRecReadSectors(DeviceObject,
+ Sector,
+ 1,
+ SectorSize,
+ Buffer);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("FsRecReadSectors() failed (Status %lx)\n", Status);
+ break;
+ }
+
+ DPRINT1("Descriptor identifier: [%.5s]\n", Buffer + 1);
+
+ switch (State)
+ {
+ case 0:
+ if ((Sector == UDFS_VRS_START_SECTOR) &&
+ (Buffer[1] == 'B') &&
+ (Buffer[2] == 'E') &&
+ (Buffer[3] == 'A') &&
+ (Buffer[4] == '0') &&
+ (Buffer[5] == '1'))
+ {
+ State = 1;
+ }
+ else
+ {
+ DPRINT1("VRS start sector is not 'BEA01'\n");
+ ExFreePool(Buffer);
+ return(STATUS_UNRECOGNIZED_VOLUME);
+ }
+ break;
+
+ case 1:
+ if ((Buffer[1] == 'N') &&
+ (Buffer[2] == 'S') &&
+ (Buffer[3] == 'R') &&
+ (Buffer[4] == '0') &&
+ ((Buffer[5] == '2') || (Buffer[5] == '3')))
+ {
+ State = 2;
+ }
+ break;
+
+ case 2:
+ if ((Buffer[1] == 'T') &&
+ (Buffer[2] == 'E') &&
+ (Buffer[3] == 'A') &&
+ (Buffer[4] == '0') &&
+ (Buffer[5] == '1'))
+ {
+ DPRINT1("Found 'TEA01'\n");
+ ExFreePool(Buffer);
+ return(STATUS_SUCCESS);
+ }
+ break;
+ }
+
+ Sector++;
+ if (Sector == UDFS_AVDP_SECTOR)
+ {
+ DPRINT1("No 'TEA01' found\n");
+ ExFreePool(Buffer);
+ return(STATUS_UNRECOGNIZED_VOLUME);
+ }
+ }
+
+ ExFreePool(Buffer);
+
+ return(STATUS_UNRECOGNIZED_VOLUME);
+}
+
+
+static NTSTATUS
+FsRecCheckAnchorVolumeDescriptorPointer(IN PDEVICE_OBJECT DeviceObject,
+ IN ULONG SectorSize)
+{
+ PUCHAR Buffer;
+ ULONG Sector;
+ NTSTATUS Status;
+ PAVDP Avdp;
+
+ Buffer = ExAllocatePool(NonPagedPool,
+ SectorSize);
+ if (Buffer == NULL)
+ {
+ return(STATUS_INSUFFICIENT_RESOURCES);
+ }
+
+ Sector = UDFS_AVDP_SECTOR;
+ Status = FsRecReadSectors(DeviceObject,
+ Sector,
+ 1,
+ SectorSize,
+ Buffer);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("FsRecReadSectors() failed (Status %lx)\n", Status);
+ ExFreePool(Buffer);
+ return(Status);
+ }
+
+ Avdp = (PAVDP)Buffer;
+ DPRINT1("Descriptor identifier: %hu\n", Avdp->DescriptorTag.Identifier);
+
+ DPRINT1("Main volume descriptor sequence location: %lu\n",
+ Avdp->MainVolumeDescriptorExtent.Location);
+
+ DPRINT1("Main volume descriptor sequence length: %lu\n",
+ Avdp->MainVolumeDescriptorExtent.Length);
+
+ DPRINT1("Reserve volume descriptor sequence location: %lu\n",
+ Avdp->ReserveVolumeDescriptorExtent.Location);
+
+ DPRINT1("Reserve volume descriptor sequence length: %lu\n",
+ Avdp->ReserveVolumeDescriptorExtent.Length);
+
+ ExFreePool(Buffer);
+
+// return(Status);
+ return(STATUS_SUCCESS);
+}
+
+
+static NTSTATUS
+FsRecIsUdfsVolume(IN PDEVICE_OBJECT DeviceObject)
+{
+ DISK_GEOMETRY DiskGeometry;
+ ULONG Size;
+ NTSTATUS Status;
+
+ Size = sizeof(DISK_GEOMETRY);
+ Status = FsRecDeviceIoControl(DeviceObject,
+ IOCTL_CDROM_GET_DRIVE_GEOMETRY,
+ NULL,
+ 0,
+ &DiskGeometry,
+ &Size);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("FsRecDeviceIoControl() failed (Status %lx)\n", Status);
+ return(Status);
+ }
+ DPRINT1("BytesPerSector: %lu\n", DiskGeometry.BytesPerSector);
+
+ /* Check the volume recognition sequence */
+ Status = FsRecCheckVolumeRecognitionSequence(DeviceObject,
+ DiskGeometry.BytesPerSector);
+ if (!NT_SUCCESS(Status))
+ return(Status);
+
+ Status = FsRecCheckAnchorVolumeDescriptorPointer(DeviceObject,
+ DiskGeometry.BytesPerSector);
+ if (!NT_SUCCESS(Status))
+ return(Status);
+
+
+ return(STATUS_SUCCESS);
+}
+
+
+NTSTATUS
+FsRecUdfsFsControl(IN PDEVICE_OBJECT DeviceObject,
+ IN PIRP Irp)
+{
+ PIO_STACK_LOCATION Stack;
+ UNICODE_STRING RegistryPath;
+ NTSTATUS Status;
+
+ Stack = IoGetCurrentIrpStackLocation(Irp);
+
+ switch (Stack->MinorFunction)
+ {
+ case IRP_MN_MOUNT_VOLUME:
+ DPRINT("Udfs: IRP_MN_MOUNT_VOLUME\n");
+ Status = FsRecIsUdfsVolume(Stack->Parameters.MountVolume.DeviceObject);
+ if (NT_SUCCESS(Status))
+ {
+ DPRINT("Identified UDFS volume\n");
+ Status = STATUS_FS_DRIVER_REQUIRED;
+ }
+ break;
+
+ case IRP_MN_LOAD_FILE_SYSTEM:
+ DPRINT("Udfs: IRP_MN_LOAD_FILE_SYSTEM\n");
+ RtlInitUnicodeStringFromLiteral(&RegistryPath,
+ L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\Udfs");
+ Status = ZwLoadDriver(&RegistryPath);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT("ZwLoadDriver failed (Status %x)\n", Status);
+ }
+ else
+ {
+ IoUnregisterFileSystem(DeviceObject);
+ }
+ break;
+
+ default:
+ DPRINT("Udfs: Unknown minor function %lx\n", Stack->MinorFunction);
+ Status = STATUS_INVALID_DEVICE_REQUEST;
+ break;
+ }
+ return(Status);
+}
+
+/* EOF */
git://git.jankratochvil.net / reactos.git / blobdiff