reactos/drivers/filesystems/ntfs/ntfs.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 2002 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
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
  18  *
  19  * COPYRIGHT:        See COPYING in the top level directory
  20  * PROJECT:          ReactOS kernel
  21  * FILE:             drivers/filesystem/ntfs/ntfs.c
  22  * PURPOSE:          NTFS filesystem driver
  23  * PROGRAMMER:       Eric Kohl
  24  *                   Pierre Schweitzer
  25  */
  26
  27 /* INCLUDES *****************************************************************/
  28
  29 #include "ntfs.h"
  30
  31 #define NDEBUG
  32 #include <debug.h>
  33
  34 /* GLOBALS *****************************************************************/
  35
  36 PNTFS_GLOBAL_DATA NtfsGlobalData = NULL;
  37
  38 /* FUNCTIONS ****************************************************************/
  39
  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 NTSTATUS
  48 NTAPI
  49 DriverEntry(PDRIVER_OBJECT DriverObject,
  50             PUNICODE_STRING RegistryPath)
  51 {
  52     UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(DEVICE_NAME);
  53     NTSTATUS Status;
  54     PDEVICE_OBJECT DeviceObject;
  55
  56     TRACE_(NTFS, "DriverEntry(%p, '%wZ')\n", DriverObject, RegistryPath);
  57
  58     Status = IoCreateDevice(DriverObject,
  59                             sizeof(NTFS_GLOBAL_DATA),
  60                             &DeviceName,
  61                             FILE_DEVICE_DISK_FILE_SYSTEM,
  62                             0,
  63                             FALSE,
  64                             &DeviceObject);
  65     if (!NT_SUCCESS(Status))
  66     {
  67         WARN_(NTFS, "IoCreateDevice failed with status: %lx\n", Status);
  68         return Status;
  69     }
  70
  71     /* Initialize global data */
  72     NtfsGlobalData = DeviceObject->DeviceExtension;
  73     RtlZeroMemory(NtfsGlobalData, sizeof(NTFS_GLOBAL_DATA));
  74
  75     NtfsGlobalData->DeviceObject = DeviceObject;
  76     NtfsGlobalData->Identifier.Type = NTFS_TYPE_GLOBAL_DATA;
  77     NtfsGlobalData->Identifier.Size = sizeof(NTFS_GLOBAL_DATA);
  78
  79     ExInitializeResourceLite(&NtfsGlobalData->Resource);
  80
  81     /* Keep trace of Driver Object */
  82     NtfsGlobalData->DriverObject = DriverObject;
  83
  84     /* Initialize IRP functions array */
  85     NtfsInitializeFunctionPointers(DriverObject);
  86
  87     /* Initialize CC functions array */
  88     NtfsGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = NtfsAcqLazyWrite;
  89     NtfsGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = NtfsRelLazyWrite;
  90     NtfsGlobalData->CacheMgrCallbacks.AcquireForReadAhead = NtfsAcqReadAhead;
  91     NtfsGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = NtfsRelReadAhead;
  92
  93     NtfsGlobalData->FastIoDispatch.SizeOfFastIoDispatch = sizeof(FAST_IO_DISPATCH);
  94     NtfsGlobalData->FastIoDispatch.FastIoCheckIfPossible = NtfsFastIoCheckIfPossible;
  95     NtfsGlobalData->FastIoDispatch.FastIoRead = NtfsFastIoRead;
  96     NtfsGlobalData->FastIoDispatch.FastIoWrite = NtfsFastIoWrite;
  97     DriverObject->FastIoDispatch = &NtfsGlobalData->FastIoDispatch;
  98
  99     /* Initialize lookaside list for IRP contexts */
 100     ExInitializeNPagedLookasideList(&NtfsGlobalData->IrpContextLookasideList,
 101                                     NULL, NULL, 0, sizeof(NTFS_IRP_CONTEXT), 'PRIN', 0);
 102     /* Initialize lookaside list for FCBs */
 103     ExInitializeNPagedLookasideList(&NtfsGlobalData->FcbLookasideList,
 104                                     NULL, NULL, 0, sizeof(NTFS_FCB), TAG_FCB, 0);
 105
 106     /* Driver can't be unloaded */
 107     DriverObject->DriverUnload = NULL;
 108
 109     NtfsGlobalData->DeviceObject->Flags |= DO_DIRECT_IO;
 110
 111     /* Register file system */
 112     IoRegisterFileSystem(NtfsGlobalData->DeviceObject);
 113     ObReferenceObject(NtfsGlobalData->DeviceObject);
 114
 115     return Status;
 116 }
 117
 118
 119 /*
 120  * FUNCTION: Called within the driver entry to initialize the IRP functions array
 121  * ARGUMENTS:
 122  *           DriverObject = object describing this driver
 123  * RETURNS: Nothing
 124  */
 125 VOID
 126 NTAPI
 127 NtfsInitializeFunctionPointers(PDRIVER_OBJECT DriverObject)
 128 {
 129     DriverObject->MajorFunction[IRP_MJ_CREATE]                   = NtfsFsdDispatch;
 130     DriverObject->MajorFunction[IRP_MJ_CLOSE]                    = NtfsFsdDispatch;
 131     DriverObject->MajorFunction[IRP_MJ_READ]                     = NtfsFsdDispatch;
 132     DriverObject->MajorFunction[IRP_MJ_WRITE]                    = NtfsFsdDispatch;
 133     DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION]        = NtfsFsdDispatch;
 134     DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = NtfsFsdDispatch;
 135     DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION]   = NtfsFsdDispatch;
 136     DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL]        = NtfsFsdDispatch;
 137     DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL]      = NtfsFsdDispatch;
 138     DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL]           = NtfsFsdDispatch;
 139
 140     return;
 141 }
 142
 143 /* EOF */