mirror of
https://github.com/reactos/reactos.git
synced 2024-08-27 05:38:41 +00:00
527f2f9057
* Create a branch for some evul shell experiments. svn path=/branches/shell-experiments/; revision=61927
109 lines
3 KiB
C
109 lines
3 KiB
C
/*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: ReactOS File System Recognizer
|
|
* FILE: drivers/filesystems/fs_rec/ext2.c
|
|
* PURPOSE: EXT2 Recognizer
|
|
* PROGRAMMER: Eric Kohl
|
|
*/
|
|
|
|
/* INCLUDES *****************************************************************/
|
|
|
|
#include "fs_rec.h"
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
/* FUNCTIONS ****************************************************************/
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
FsRecIsExt2Volume(IN PVOID PackedBootSector)
|
|
{
|
|
UNREFERENCED_PARAMETER(PackedBootSector);
|
|
/* For now, always return failure... */
|
|
return FALSE;
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
FsRecExt2FsControl(IN PDEVICE_OBJECT DeviceObject,
|
|
IN PIRP Irp)
|
|
{
|
|
PIO_STACK_LOCATION Stack;
|
|
NTSTATUS Status;
|
|
PDEVICE_OBJECT MountDevice;
|
|
PVOID Bpb = NULL;
|
|
ULONG SectorSize;
|
|
LARGE_INTEGER Offset = {{0, 0}};
|
|
BOOLEAN DeviceError = FALSE;
|
|
PAGED_CODE();
|
|
|
|
/* Get the I/O Stack and check the function type */
|
|
Stack = IoGetCurrentIrpStackLocation(Irp);
|
|
switch (Stack->MinorFunction)
|
|
{
|
|
case IRP_MN_MOUNT_VOLUME:
|
|
|
|
/* Assume failure */
|
|
Status = STATUS_UNRECOGNIZED_VOLUME;
|
|
|
|
/* Get the device object and request the sector size */
|
|
MountDevice = Stack->Parameters.MountVolume.DeviceObject;
|
|
if (FsRecGetDeviceSectorSize(MountDevice, &SectorSize))
|
|
{
|
|
/* Try to read the BPB */
|
|
if (FsRecReadBlock(MountDevice,
|
|
&Offset,
|
|
512,
|
|
SectorSize,
|
|
(PVOID)&Bpb,
|
|
&DeviceError))
|
|
{
|
|
/* Check if it's an actual EXT2 volume */
|
|
if (FsRecIsExt2Volume(Bpb))
|
|
{
|
|
/* It is! */
|
|
Status = STATUS_FS_DRIVER_REQUIRED;
|
|
}
|
|
}
|
|
|
|
/* Free the boot sector if we have one */
|
|
ExFreePool(Bpb);
|
|
}
|
|
else
|
|
{
|
|
/* We have some sort of failure in the storage stack */
|
|
DeviceError = TRUE;
|
|
}
|
|
|
|
/* Check if we have an error on the stack */
|
|
if (DeviceError)
|
|
{
|
|
/* Was this because of a floppy? */
|
|
if (MountDevice->Characteristics & FILE_FLOPPY_DISKETTE)
|
|
{
|
|
/* Let the FS try anyway */
|
|
Status = STATUS_FS_DRIVER_REQUIRED;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case IRP_MN_LOAD_FILE_SYSTEM:
|
|
|
|
/* Load the file system */
|
|
Status = FsRecLoadFileSystem(DeviceObject,
|
|
L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\Ext2");
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Invalid request */
|
|
Status = STATUS_INVALID_DEVICE_REQUEST;
|
|
}
|
|
|
|
/* Return Status */
|
|
return Status;
|
|
}
|
|
|
|
/* EOF */
|