reactos/drivers/filesystems/fastfat/iface.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License along
  16  *  with this program; if not, write to the Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19 /*
  20  * PROJECT:          ReactOS kernel
  21  * FILE:             drivers/fs/vfat/iface.c
  22  * PURPOSE:          VFAT Filesystem
  23  * PROGRAMMER:       Jason Filby (jasonfilby@yahoo.com)
  24  */
  25
  26 /* INCLUDES *****************************************************************/
  27
  28 #include "vfat.h"
  29
  30 #define NDEBUG
  31 #include <debug.h>
  32
  33 /* GLOBALS *****************************************************************/
  34
  35 PVFAT_GLOBAL_DATA VfatGlobalData;
  36
  37 /* FUNCTIONS ****************************************************************/
  38
  39 /*
  40  * FUNCTION: Called by the system to initialize the driver
  41  * ARGUMENTS:
  42  *           DriverObject = object describing this driver
  43  *           RegistryPath = path to our configuration entries
  44  * RETURNS: Success or failure
  45  */
  46 NTSTATUS
  47 NTAPI
  48 DriverEntry(
  49     IN PDRIVER_OBJECT DriverObject,
  50     IN PUNICODE_STRING RegistryPath)
  51 {
  52     PDEVICE_OBJECT DeviceObject;
  53     UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Fat");
  54     NTSTATUS Status;
  55
  56     UNREFERENCED_PARAMETER(RegistryPath);
  57
  58     Status = IoCreateDevice(DriverObject,
  59                             sizeof(VFAT_GLOBAL_DATA),
  60                             &DeviceName,
  61                             FILE_DEVICE_DISK_FILE_SYSTEM,
  62                             0,
  63                             FALSE,
  64                             &DeviceObject);
  65     if (Status == STATUS_OBJECT_NAME_EXISTS ||
  66        Status == STATUS_OBJECT_NAME_COLLISION)
  67     {
  68         /* Try an other name, if 'Fat' is already in use. 'Fat' is also used by fastfat.sys on W2K */
  69         RtlInitUnicodeString(&DeviceName, L"\\RosFat");
  70         Status = IoCreateDevice(DriverObject,
  71                                 sizeof(VFAT_GLOBAL_DATA),
  72                                 &DeviceName,
  73                                 FILE_DEVICE_DISK_FILE_SYSTEM,
  74                                 0,
  75                                 FALSE,
  76                                 &DeviceObject);
  77     }
  78
  79     if (!NT_SUCCESS(Status))
  80     {
  81         return Status;
  82     }
  83
  84     VfatGlobalData = DeviceObject->DeviceExtension;
  85     RtlZeroMemory (VfatGlobalData, sizeof(VFAT_GLOBAL_DATA));
  86     VfatGlobalData->DriverObject = DriverObject;
  87     VfatGlobalData->DeviceObject = DeviceObject;
  88
  89     DeviceObject->Flags |= DO_DIRECT_IO;
  90     DriverObject->MajorFunction[IRP_MJ_CLOSE] = VfatBuildRequest;
  91     DriverObject->MajorFunction[IRP_MJ_CREATE] = VfatBuildRequest;
  92     DriverObject->MajorFunction[IRP_MJ_READ] = VfatBuildRequest;
  93     DriverObject->MajorFunction[IRP_MJ_WRITE] = VfatBuildRequest;
  94     DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = VfatBuildRequest;
  95     DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = VfatBuildRequest;
  96     DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = VfatBuildRequest;
  97     DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = VfatBuildRequest;
  98     DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = VfatBuildRequest;
  99     DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] = VfatBuildRequest;
 100     DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = VfatShutdown;
 101     DriverObject->MajorFunction[IRP_MJ_LOCK_CONTROL] = VfatBuildRequest;
 102     DriverObject->MajorFunction[IRP_MJ_CLEANUP] = VfatBuildRequest;
 103     DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = VfatBuildRequest;
 104     DriverObject->MajorFunction[IRP_MJ_PNP] = VfatBuildRequest;
 105
 106     DriverObject->DriverUnload = NULL;
 107
 108     /* Cache manager */
 109     VfatGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = VfatAcquireForLazyWrite;
 110     VfatGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = VfatReleaseFromLazyWrite;
 111     VfatGlobalData->CacheMgrCallbacks.AcquireForReadAhead = VfatAcquireForReadAhead;
 112     VfatGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = VfatReleaseFromReadAhead;
 113
 114     /* Fast I/O */
 115     VfatInitFastIoRoutines(&VfatGlobalData->FastIoDispatch);
 116     DriverObject->FastIoDispatch = &VfatGlobalData->FastIoDispatch;
 117
 118     /* Private lists */
 119     ExInitializeNPagedLookasideList(&VfatGlobalData->FcbLookasideList,
 120                                     NULL, NULL, 0, sizeof(VFATFCB), TAG_FCB, 0);
 121     ExInitializeNPagedLookasideList(&VfatGlobalData->CcbLookasideList,
 122                                     NULL, NULL, 0, sizeof(VFATCCB), TAG_CCB, 0);
 123     ExInitializeNPagedLookasideList(&VfatGlobalData->IrpContextLookasideList,
 124                                     NULL, NULL, 0, sizeof(VFAT_IRP_CONTEXT), TAG_IRP, 0);
 125
 126     ExInitializeResourceLite(&VfatGlobalData->VolumeListLock);
 127     InitializeListHead(&VfatGlobalData->VolumeListHead);
 128     IoRegisterFileSystem(DeviceObject);
 129     return STATUS_SUCCESS;
 130 }
 131
 132 /* EOF */