iface.c

来自「一个类似windows」· C语言 代码 · 共 130 行

/*
 *  ReactOS kernel
 *  Copyright (C) 1998, 1999, 2000, 2001 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.
 */
/*
 * PROJECT:          ReactOS kernel
 * FILE:             drivers/fs/vfat/iface.c
 * PURPOSE:          VFAT Filesystem
 * PROGRAMMER:       Jason Filby ([e-mail])
 */

/* INCLUDES *****************************************************************/

#define NDEBUG
#include "vfat.h"

/* GLOBALS *****************************************************************/

PVFAT_GLOBAL_DATA VfatGlobalData;

/* FUNCTIONS ****************************************************************/

NTSTATUS NTAPI
DriverEntry(PDRIVER_OBJECT DriverObject,
	    PUNICODE_STRING RegistryPath)
/*
 * 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
 */
{
   PDEVICE_OBJECT DeviceObject;
   UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Fat");
   NTSTATUS Status;

   Status = IoCreateDevice(DriverObject,
			   sizeof(VFAT_GLOBAL_DATA),
			   &DeviceName,
			   FILE_DEVICE_DISK_FILE_SYSTEM,
			   0,
			   FALSE,
			   &DeviceObject);
   if (!NT_SUCCESS(Status))
     {
       if (Status == STATUS_OBJECT_NAME_EXISTS ||
	   Status == STATUS_OBJECT_NAME_COLLISION)
	 {
	   /* Try an other name, if 'Fat' is already in use. 'Fat' is also used by fastfat.sys on W2K */
	   RtlInitUnicodeString(&DeviceName, L"\\RosFat");
           Status = IoCreateDevice(DriverObject,
			           sizeof(VFAT_GLOBAL_DATA),
			           &DeviceName,
			           FILE_DEVICE_DISK_FILE_SYSTEM,
			           0,
			           FALSE,
			           &DeviceObject);
	   if (!NT_SUCCESS(Status))
	     {
               return (Status);
	     }
	 }
     }
   VfatGlobalData = DeviceObject->DeviceExtension;
   RtlZeroMemory (VfatGlobalData, sizeof(VFAT_GLOBAL_DATA));
   VfatGlobalData->DriverObject = DriverObject;
   VfatGlobalData->DeviceObject = DeviceObject;

   DeviceObject->Flags |= DO_DIRECT_IO;
   DriverObject->MajorFunction[IRP_MJ_CLOSE] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_CREATE] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_READ] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_WRITE] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] =
     VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] =
     VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = VfatShutdown;
   DriverObject->MajorFunction[IRP_MJ_LOCK_CONTROL] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_CLEANUP] = VfatBuildRequest;
   DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = VfatBuildRequest;

   DriverObject->DriverUnload = NULL;

   /* Cache manager */
   VfatGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = VfatAcquireForLazyWrite;
   VfatGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = VfatReleaseFromLazyWrite;
   VfatGlobalData->CacheMgrCallbacks.AcquireForReadAhead = VfatAcquireForReadAhead;
   VfatGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = VfatReleaseFromReadAhead;

   /* Fast I/O */
   VfatInitFastIoRoutines(&VfatGlobalData->FastIoDispatch);
   DriverObject->FastIoDispatch = &VfatGlobalData->FastIoDispatch;

   /* Private lists */
   ExInitializeNPagedLookasideList(&VfatGlobalData->FcbLookasideList,
                                   NULL, NULL, 0, sizeof(VFATFCB), TAG_FCB, 0);
   ExInitializeNPagedLookasideList(&VfatGlobalData->CcbLookasideList,
                                   NULL, NULL, 0, sizeof(VFATCCB), TAG_CCB, 0);
   ExInitializeNPagedLookasideList(&VfatGlobalData->IrpContextLookasideList,
                                   NULL, NULL, 0, sizeof(VFAT_IRP_CONTEXT), TAG_IRP, 0);

   ExInitializeResourceLite(&VfatGlobalData->VolumeListLock);
   InitializeListHead(&VfatGlobalData->VolumeListHead);
   IoRegisterFileSystem(DeviceObject);
   return(STATUS_SUCCESS);
}

/* EOF */