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 #define NDEBUG
  29 #include "vfat.h"
  30
  31 /* GLOBALS *****************************************************************/
  32
  33 PVFAT_GLOBAL_DATA VfatGlobalData;
  34
  35 /* FUNCTIONS ****************************************************************/
  36
  37 NTSTATUS NTAPI
  38 DriverEntry(PDRIVER_OBJECT DriverObject,
  39             PUNICODE_STRING RegistryPath)
  40 /*
  41  * FUNCTION: Called by the system to initialize the driver
  42  * ARGUMENTS:
  43  *           DriverObject = object describing this driver
  44  *           RegistryPath = path to our configuration entries
  45  * RETURNS: Success or failure
  46  */
  47 {
  48    PDEVICE_OBJECT DeviceObject;
  49    UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Fat");
  50    NTSTATUS Status;
  51
  52    Status = IoCreateDevice(DriverObject,
  53                            sizeof(VFAT_GLOBAL_DATA),
  54                            &DeviceName,
  55                            FILE_DEVICE_DISK_FILE_SYSTEM,
  56                            0,
  57                            FALSE,
  58                            &DeviceObject);
  59
  60    if (Status == STATUS_OBJECT_NAME_EXISTS ||
  61        Status == STATUS_OBJECT_NAME_COLLISION)
  62      {
  63        /* Try an other name, if 'Fat' is already in use. 'Fat' is also used by fastfat.sys on W2K */
  64        RtlInitUnicodeString(&DeviceName, L"\\RosFat");
  65        Status = IoCreateDevice(DriverObject,
  66                                sizeof(VFAT_GLOBAL_DATA),
  67                                &DeviceName,
  68                                FILE_DEVICE_DISK_FILE_SYSTEM,
  69                                0,
  70                                FALSE,
  71                                &DeviceObject);
  72      }
  73
  74
  75
  76    if (!NT_SUCCESS(Status))
  77      {
  78        return (Status);
  79      }
  80
  81    VfatGlobalData = DeviceObject->DeviceExtension;
  82    RtlZeroMemory (VfatGlobalData, sizeof(VFAT_GLOBAL_DATA));
  83    VfatGlobalData->DriverObject = DriverObject;
  84    VfatGlobalData->DeviceObject = DeviceObject;
  85
  86    DeviceObject->Flags |= DO_DIRECT_IO;
  87    DriverObject->MajorFunction[IRP_MJ_CLOSE] = VfatBuildRequest;
  88    DriverObject->MajorFunction[IRP_MJ_CREATE] = VfatBuildRequest;
  89    DriverObject->MajorFunction[IRP_MJ_READ] = VfatBuildRequest;
  90    DriverObject->MajorFunction[IRP_MJ_WRITE] = VfatBuildRequest;
  91    DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = VfatBuildRequest;
  92    DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = VfatBuildRequest;
  93    DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = VfatBuildRequest;
  94    DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = VfatBuildRequest;
  95    DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] =
  96      VfatBuildRequest;
  97    DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] =
  98      VfatBuildRequest;
  99    DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = VfatShutdown;
 100    DriverObject->MajorFunction[IRP_MJ_LOCK_CONTROL] = VfatBuildRequest;
 101    DriverObject->MajorFunction[IRP_MJ_CLEANUP] = VfatBuildRequest;
 102    DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = VfatBuildRequest;
 103    DriverObject->MajorFunction[IRP_MJ_PNP] = VfatBuildRequest;
 104
 105    DriverObject->DriverUnload = NULL;
 106
 107    /* Cache manager */
 108    VfatGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = VfatAcquireForLazyWrite;
 109    VfatGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = VfatReleaseFromLazyWrite;
 110    VfatGlobalData->CacheMgrCallbacks.AcquireForReadAhead = VfatAcquireForReadAhead;
 111    VfatGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = VfatReleaseFromReadAhead;
 112
 113    /* Fast I/O */
 114    VfatInitFastIoRoutines(&VfatGlobalData->FastIoDispatch);
 115    DriverObject->FastIoDispatch = &VfatGlobalData->FastIoDispatch;
 116
 117    /* Private lists */
 118    ExInitializeNPagedLookasideList(&VfatGlobalData->FcbLookasideList,
 119                                    NULL, NULL, 0, sizeof(VFATFCB), TAG_FCB, 0);
 120    ExInitializeNPagedLookasideList(&VfatGlobalData->CcbLookasideList,
 121                                    NULL, NULL, 0, sizeof(VFATCCB), TAG_CCB, 0);
 122    ExInitializeNPagedLookasideList(&VfatGlobalData->IrpContextLookasideList,
 123                                    NULL, NULL, 0, sizeof(VFAT_IRP_CONTEXT), TAG_IRP, 0);
 124
 125    ExInitializeResourceLite(&VfatGlobalData->VolumeListLock);
 126    InitializeListHead(&VfatGlobalData->VolumeListHead);
 127    IoRegisterFileSystem(DeviceObject);
 128    return(STATUS_SUCCESS);
 129 }
 130
 131 /* EOF */
 132