mirror of
https://github.com/reactos/reactos.git
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145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/*
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* ReactOS kernel
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* Copyright (C) 2002 ReactOS Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id$
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: services/fs/fs_rec/cdfs.c
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* PURPOSE: Filesystem recognizer driver
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* PROGRAMMER: Eric Kohl
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*/
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/* INCLUDES *****************************************************************/
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#include <ntifs.h>
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#include <ntdddisk.h>
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#include <ntddcdrm.h>
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#define NDEBUG
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#include <debug.h>
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#include "fs_rec.h"
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#define CDFS_PVD_SECTOR 16
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/* FUNCTIONS ****************************************************************/
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static NTSTATUS
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FsRecIsCdfsVolume(IN PDEVICE_OBJECT DeviceObject)
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{
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DISK_GEOMETRY DiskGeometry;
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PUCHAR Buffer;
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NTSTATUS Status;
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ULONG Size;
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Size = sizeof(DISK_GEOMETRY);
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Status = FsRecDeviceIoControl(DeviceObject,
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IOCTL_CDROM_GET_DRIVE_GEOMETRY,
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NULL,
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0,
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&DiskGeometry,
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&Size);
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if (!NT_SUCCESS(Status))
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{
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DPRINT("FsRecDeviceIoControl() failed (Status %lx)\n", Status);
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return(Status);
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}
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DPRINT("BytesPerSector: %lu\n", DiskGeometry.BytesPerSector);
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Buffer = ExAllocatePool(NonPagedPool,
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DiskGeometry.BytesPerSector);
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if (Buffer == NULL)
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{
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return(STATUS_INSUFFICIENT_RESOURCES);
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}
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Status = FsRecReadSectors(DeviceObject,
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CDFS_PVD_SECTOR,
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1,
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DiskGeometry.BytesPerSector,
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Buffer);
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if (!NT_SUCCESS(Status))
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{
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DPRINT("FsRecReadSectors() failed (Status %lx)\n", Status);
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ExFreePool(Buffer);
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return(Status);
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}
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Buffer[6] = 0;
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DPRINT("CD-identifier: [%.5s]\n", Buffer + 1);
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Status = (Buffer[0] == 1 &&
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Buffer[1] == 'C' &&
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Buffer[2] == 'D' &&
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Buffer[3] == '0' &&
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Buffer[4] == '0' &&
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Buffer[5] == '1') ? STATUS_SUCCESS : STATUS_UNRECOGNIZED_VOLUME;
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ExFreePool(Buffer);
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return(Status);
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}
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NTSTATUS
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FsRecCdfsFsControl(IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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PIO_STACK_LOCATION Stack;
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static UNICODE_STRING RegistryPath =
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RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\Cdfs");
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NTSTATUS Status;
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Stack = IoGetCurrentIrpStackLocation(Irp);
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switch (Stack->MinorFunction)
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{
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case IRP_MN_MOUNT_VOLUME:
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DPRINT("Cdfs: IRP_MN_MOUNT_VOLUME\n");
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Status = FsRecIsCdfsVolume(Stack->Parameters.MountVolume.DeviceObject);
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if (NT_SUCCESS(Status))
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{
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DPRINT("Identified CDFS volume\n");
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Status = STATUS_FS_DRIVER_REQUIRED;
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}
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break;
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case IRP_MN_LOAD_FILE_SYSTEM:
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DPRINT("Cdfs: IRP_MN_LOAD_FILE_SYSTEM\n");
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Status = ZwLoadDriver(&RegistryPath);
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if (!NT_SUCCESS(Status))
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{
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DPRINT("ZwLoadDriver failed (Status %x)\n", Status);
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}
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else
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{
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IoUnregisterFileSystem(DeviceObject);
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}
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break;
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default:
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DPRINT("Cdfs: Unknown minor function %lx\n", Stack->MinorFunction);
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Status = STATUS_INVALID_DEVICE_REQUEST;
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break;
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}
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return(Status);
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}
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/* EOF */
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