Added forgotten ext2.c

svn path=/branches/ext2/; revision=13013

reactos/drivers/fs/fs_rec/ext2.c

@@ -0,0 +1,136 @@
+/*
+ *  ReactOS kernel
+ *  Copyright (C) 2002,2003 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: fat.c 9284 2004-05-02 20:12:38Z hbirr $
+ *
+ * COPYRIGHT:        See COPYING in the top level directory
+ * PROJECT:          ReactOS kernel
+ * FILE:             drivers/fs/fs_rec/ext2.c (based on vfat.c)
+ * PURPOSE:          Filesystem recognizer driver
+ * PROGRAMMER:       Eric Kohl
+ */
+
+/* INCLUDES *****************************************************************/
+
+#include <ddk/ntddk.h>
+#include <rosrtl/string.h>
+
+#define NDEBUG
+#include <debug.h>
+
+#include "fs_rec.h"
+
+
+/* FUNCTIONS ****************************************************************/
+
+static NTSTATUS
+FsRecIsExt2Volume(IN PDEVICE_OBJECT DeviceObject)
+{
+   NTSTATUS Status;
+   PARTITION_INFORMATION PartitionInfo;
+   DISK_GEOMETRY DiskGeometry;
+   ULONG Size;
+   BOOL RecognizedFS = FALSE;
+   Size = sizeof(DISK_GEOMETRY);
+
+   Status = FsRecDeviceIoControl(DeviceObject,
+				 IOCTL_DISK_GET_DRIVE_GEOMETRY,
+				 NULL,
+				 0,
+				 &DiskGeometry,
+				 &Size);
+   if (!NT_SUCCESS(Status))
+   {
+      DPRINT("FsRecDeviceIoControl faild (%x)\n", Status);
+      return Status;
+   }
+   if (DiskGeometry.MediaType == FixedMedia || DiskGeometry.MediaType == RemovableMedia)
+   {
+      // We have found a hard disk
+      Size = sizeof(PARTITION_INFORMATION);
+      Status = FsRecDeviceIoControl(DeviceObject,
+				    IOCTL_DISK_GET_PARTITION_INFO,
+				    NULL,
+				    0,
+				    &PartitionInfo,
+				    &Size);
+      if (!NT_SUCCESS(Status))
+      {
+         DPRINT("FsRecDeviceIoControl faild (%x)\n", Status);
+         return Status;
+      }
+      
+      if (PartitionInfo.PartitionType)
+      {
+          if (PartitionInfo.PartitionType == PARTITION_EXT2)
+         {
+            RecognizedFS = TRUE;
+         }
+      }
+   }
+
+   return RecognizedFS ? STATUS_SUCCESS : STATUS_UNRECOGNIZED_VOLUME;
+}
+
+
+NTSTATUS
+FsRecExt2FsControl(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("FAT: IRP_MN_MOUNT_VOLUME\n");
+	Status = FsRecIsExt2Volume(Stack->Parameters.MountVolume.DeviceObject);
+	if (NT_SUCCESS(Status))
+	  {
+	    DPRINT("Identified FAT volume\n");
+	    Status = STATUS_FS_DRIVER_REQUIRED;
+	  }
+	break;
+
+      case IRP_MN_LOAD_FILE_SYSTEM:
+	DPRINT("FAT: IRP_MN_LOAD_FILE_SYSTEM\n");
+	RtlRosInitUnicodeStringFromLiteral(&RegistryPath,
+			     L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\Ext2");
+	Status = ZwLoadDriver(&RegistryPath);
+	if (!NT_SUCCESS(Status))
+	  {
+	    DPRINT("ZwLoadDriver failed (Status %x)\n", Status);
+	  }
+	else
+	  {
+	    IoUnregisterFileSystem(DeviceObject);
+	  }
+	break;
+
+      default:
+	DPRINT("FAT: Unknown minor function %lx\n", Stack->MinorFunction);
+	Status = STATUS_INVALID_DEVICE_REQUEST;
+	break;
+    }
+  return(Status);
+}
+
+/* EOF */