reactos/drivers/filesystems/ntfs/ntfs.c

152 lines
5.6 KiB
C

/*
* ReactOS kernel
* Copyright (C) 2002 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: drivers/filesystem/ntfs/ntfs.c
* PURPOSE: NTFS filesystem driver
* PROGRAMMER: Eric Kohl
* Pierre Schweitzer
*/
/* INCLUDES *****************************************************************/
#include "ntfs.h"
#define NDEBUG
#include <debug.h>
#if defined(ALLOC_PRAGMA)
#pragma alloc_text(INIT, DriverEntry)
#pragma alloc_text(INIT, NtfsInitializeFunctionPointers)
#endif
/* GLOBALS *****************************************************************/
PNTFS_GLOBAL_DATA NtfsGlobalData = NULL;
/* FUNCTIONS ****************************************************************/
/*
* FUNCTION: Called by the system to initialize the driver
* ARGUMENTS:
* DriverObject = object describing this driver
* RegistryPath = path to our configuration entries
* RETURNS: Success or failure
*/
INIT_SECTION
NTSTATUS
NTAPI
DriverEntry(PDRIVER_OBJECT DriverObject,
PUNICODE_STRING RegistryPath)
{
UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(DEVICE_NAME);
NTSTATUS Status;
PDEVICE_OBJECT DeviceObject;
TRACE_(NTFS, "DriverEntry(%p, '%wZ')\n", DriverObject, RegistryPath);
Status = IoCreateDevice(DriverObject,
sizeof(NTFS_GLOBAL_DATA),
&DeviceName,
FILE_DEVICE_DISK_FILE_SYSTEM,
0,
FALSE,
&DeviceObject);
if (!NT_SUCCESS(Status))
{
WARN_(NTFS, "IoCreateDevice failed with status: %lx\n", Status);
return Status;
}
/* Initialize global data */
NtfsGlobalData = DeviceObject->DeviceExtension;
RtlZeroMemory(NtfsGlobalData, sizeof(NTFS_GLOBAL_DATA));
NtfsGlobalData->DeviceObject = DeviceObject;
NtfsGlobalData->Identifier.Type = NTFS_TYPE_GLOBAL_DATA;
NtfsGlobalData->Identifier.Size = sizeof(NTFS_GLOBAL_DATA);
ExInitializeResourceLite(&NtfsGlobalData->Resource);
/* Keep trace of Driver Object */
NtfsGlobalData->DriverObject = DriverObject;
/* Initialize IRP functions array */
NtfsInitializeFunctionPointers(DriverObject);
/* Initialize CC functions array */
NtfsGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = NtfsAcqLazyWrite;
NtfsGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = NtfsRelLazyWrite;
NtfsGlobalData->CacheMgrCallbacks.AcquireForReadAhead = NtfsAcqReadAhead;
NtfsGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = NtfsRelReadAhead;
NtfsGlobalData->FastIoDispatch.SizeOfFastIoDispatch = sizeof(FAST_IO_DISPATCH);
NtfsGlobalData->FastIoDispatch.FastIoCheckIfPossible = NtfsFastIoCheckIfPossible;
NtfsGlobalData->FastIoDispatch.FastIoRead = NtfsFastIoRead;
NtfsGlobalData->FastIoDispatch.FastIoWrite = NtfsFastIoWrite;
DriverObject->FastIoDispatch = &NtfsGlobalData->FastIoDispatch;
/* Initialize lookaside list for IRP contexts */
ExInitializeNPagedLookasideList(&NtfsGlobalData->IrpContextLookasideList,
NULL, NULL, 0, sizeof(NTFS_IRP_CONTEXT), 'PRIN', 0);
/* Initialize lookaside list for FCBs */
ExInitializeNPagedLookasideList(&NtfsGlobalData->FcbLookasideList,
NULL, NULL, 0, sizeof(NTFS_FCB), TAG_FCB, 0);
/* Driver can't be unloaded */
DriverObject->DriverUnload = NULL;
NtfsGlobalData->DeviceObject->Flags |= DO_DIRECT_IO;
/* Register file system */
IoRegisterFileSystem(NtfsGlobalData->DeviceObject);
ObReferenceObject(NtfsGlobalData->DeviceObject);
return Status;
}
/*
* FUNCTION: Called within the driver entry to initialize the IRP functions array
* ARGUMENTS:
* DriverObject = object describing this driver
* RETURNS: Nothing
*/
INIT_SECTION
VOID
NTAPI
NtfsInitializeFunctionPointers(PDRIVER_OBJECT DriverObject)
{
DriverObject->MajorFunction[IRP_MJ_CREATE] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_CLEANUP] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_READ] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_WRITE] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = NtfsFsdDispatch;
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = NtfsFsdDispatch;
return;
}
/* EOF */