mirror of
https://github.com/reactos/reactos.git
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142 lines
4.6 KiB
C
142 lines
4.6 KiB
C
/*
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* ReactOS kernel
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* Copyright (C) 2002, 2003 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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: drivers/fs/cdfs/cdfs.c
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* PURPOSE: CDROM (ISO 9660) filesystem driver
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* PROGRAMMER: Art Yerkes
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* Eric Kohl
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*/
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/* INCLUDES *****************************************************************/
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#include "cdfs.h"
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#define NDEBUG
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#include <debug.h>
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/* GLOBALS ******************************************************************/
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PCDFS_GLOBAL_DATA CdfsGlobalData;
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/* FUNCTIONS ****************************************************************/
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NTSTATUS NTAPI
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DriverEntry(PDRIVER_OBJECT DriverObject,
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PUNICODE_STRING RegistryPath)
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/*
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* FUNCTION: Called by the system to initalize the driver
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* ARGUMENTS:
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* DriverObject = object describing this driver
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* RegistryPath = path to our configuration entries
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* RETURNS: Success or failure
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*/
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{
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PDEVICE_OBJECT DeviceObject;
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NTSTATUS Status;
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UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Cdfs");
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DPRINT("CDFS 0.0.3\n");
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Status = IoCreateDevice(DriverObject,
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sizeof(CDFS_GLOBAL_DATA),
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&DeviceName,
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FILE_DEVICE_CD_ROM_FILE_SYSTEM,
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0,
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FALSE,
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&DeviceObject);
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if (!NT_SUCCESS(Status))
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{
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return(Status);
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}
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/* Initialize global data */
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CdfsGlobalData = DeviceObject->DeviceExtension;
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RtlZeroMemory(CdfsGlobalData,
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sizeof(CDFS_GLOBAL_DATA));
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CdfsGlobalData->DriverObject = DriverObject;
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CdfsGlobalData->DeviceObject = DeviceObject;
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/* Initialize driver data */
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DeviceObject->Flags = DO_DIRECT_IO;
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DriverObject->MajorFunction[IRP_MJ_CLOSE] = CdfsClose;
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DriverObject->MajorFunction[IRP_MJ_CLEANUP] = CdfsCleanup;
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DriverObject->MajorFunction[IRP_MJ_CREATE] = CdfsCreate;
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DriverObject->MajorFunction[IRP_MJ_READ] = CdfsRead;
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DriverObject->MajorFunction[IRP_MJ_WRITE] = CdfsWrite;
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DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] =
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CdfsFileSystemControl;
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DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] =
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CdfsDirectoryControl;
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DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] =
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CdfsQueryInformation;
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DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] =
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CdfsSetInformation;
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DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] =
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CdfsQueryVolumeInformation;
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DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] =
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CdfsSetVolumeInformation;
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DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] =
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CdfsDeviceControl;
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DriverObject->DriverUnload = NULL;
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/* Cache manager */
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CdfsGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = CdfsAcquireForLazyWrite;
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CdfsGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = CdfsReleaseFromLazyWrite;
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CdfsGlobalData->CacheMgrCallbacks.AcquireForReadAhead = CdfsAcquireForLazyWrite;
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CdfsGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = CdfsReleaseFromLazyWrite;
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DeviceObject->Flags |= DO_LOW_PRIORITY_FILESYSTEM;
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IoRegisterFileSystem(DeviceObject);
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DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
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return(STATUS_SUCCESS);
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}
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BOOLEAN NTAPI
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CdfsAcquireForLazyWrite(IN PVOID Context,
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IN BOOLEAN Wait)
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{
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PFCB Fcb = (PFCB)Context;
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ASSERT(Fcb);
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DPRINT("CdfsAcquireForLazyWrite(): Fcb %p\n", Fcb);
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if (!ExAcquireResourceExclusiveLite(&(Fcb->MainResource), Wait))
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{
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DPRINT("CdfsAcquireForLazyWrite(): ExReleaseResourceLite failed.\n");
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return FALSE;
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}
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return TRUE;
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}
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VOID NTAPI
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CdfsReleaseFromLazyWrite(IN PVOID Context)
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{
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PFCB Fcb = (PFCB)Context;
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ASSERT(Fcb);
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DPRINT("CdfsReleaseFromLazyWrite(): Fcb %p\n", Fcb);
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ExReleaseResourceLite(&(Fcb->MainResource));
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}
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