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 #if defined(ALLOC_PRAGMA)
  35 #pragma alloc_text(INIT, DriverEntry)
  36 #pragma alloc_text(INIT, NtfsInitializeFunctionPointers)
  37 #endif
  38
  39 /* GLOBALS *****************************************************************/
  40
  41 PNTFS_GLOBAL_DATA NtfsGlobalData = NULL;
  42
  43 /* FUNCTIONS ****************************************************************/
  44
  45 /*
  46  * FUNCTION: Called by the system to initialize the driver
  47  * ARGUMENTS:
  48  *           DriverObject = object describing this driver
  49  *           RegistryPath = path to our configuration entries
  50  * RETURNS: Success or failure
  51  */
  52 INIT_SECTION
  53 NTSTATUS
  54 NTAPI
  55 DriverEntry(PDRIVER_OBJECT DriverObject,
  56             PUNICODE_STRING RegistryPath)
  57 {
  58     UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(DEVICE_NAME);
  59     NTSTATUS Status;
  60     PDEVICE_OBJECT DeviceObject;
  61
  62     TRACE_(NTFS, "DriverEntry(%p, '%wZ')\n", DriverObject, RegistryPath);
  63
  64     Status = IoCreateDevice(DriverObject,
  65                             sizeof(NTFS_GLOBAL_DATA),
  66                             &DeviceName,
  67                             FILE_DEVICE_DISK_FILE_SYSTEM,
  68                             0,
  69                             FALSE,
  70                             &DeviceObject);
  71     if (!NT_SUCCESS(Status))
  72     {
  73         WARN_(NTFS, "IoCreateDevice failed with status: %lx\n", Status);
  74         return Status;
  75     }
  76
  77     /* Initialize global data */
  78     NtfsGlobalData = DeviceObject->DeviceExtension;
  79     RtlZeroMemory(NtfsGlobalData, sizeof(NTFS_GLOBAL_DATA));
  80
  81     NtfsGlobalData->DeviceObject = DeviceObject;
  82     NtfsGlobalData->Identifier.Type = NTFS_TYPE_GLOBAL_DATA;
  83     NtfsGlobalData->Identifier.Size = sizeof(NTFS_GLOBAL_DATA);
  84
  85     ExInitializeResourceLite(&NtfsGlobalData->Resource);
  86
  87     /* Keep trace of Driver Object */
  88     NtfsGlobalData->DriverObject = DriverObject;
  89
  90     /* Initialize IRP functions array */
  91     NtfsInitializeFunctionPointers(DriverObject);
  92
  93     /* Initialize CC functions array */
  94     NtfsGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = NtfsAcqLazyWrite;
  95     NtfsGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = NtfsRelLazyWrite;
  96     NtfsGlobalData->CacheMgrCallbacks.AcquireForReadAhead = NtfsAcqReadAhead;
  97     NtfsGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = NtfsRelReadAhead;
  98
  99     NtfsGlobalData->FastIoDispatch.SizeOfFastIoDispatch = sizeof(FAST_IO_DISPATCH);
 100     NtfsGlobalData->FastIoDispatch.FastIoCheckIfPossible = NtfsFastIoCheckIfPossible;
 101     NtfsGlobalData->FastIoDispatch.FastIoRead = NtfsFastIoRead;
 102     NtfsGlobalData->FastIoDispatch.FastIoWrite = NtfsFastIoWrite;
 103     DriverObject->FastIoDispatch = &NtfsGlobalData->FastIoDispatch;
 104
 105     /* Initialize lookaside list for IRP contexts */
 106     ExInitializeNPagedLookasideList(&NtfsGlobalData->IrpContextLookasideList,
 107                                     NULL, NULL, 0, sizeof(NTFS_IRP_CONTEXT), 'PRIN', 0);
 108     /* Initialize lookaside list for FCBs */
 109     ExInitializeNPagedLookasideList(&NtfsGlobalData->FcbLookasideList,
 110                                     NULL, NULL, 0, sizeof(NTFS_FCB), TAG_FCB, 0);
 111
 112     /* Driver can't be unloaded */
 113     DriverObject->DriverUnload = NULL;
 114
 115     NtfsGlobalData->DeviceObject->Flags |= DO_DIRECT_IO;
 116
 117     /* Register file system */
 118     IoRegisterFileSystem(NtfsGlobalData->DeviceObject);
 119     ObReferenceObject(NtfsGlobalData->DeviceObject);
 120
 121     return Status;
 122 }
 123
 124
 125 /*
 126  * FUNCTION: Called within the driver entry to initialize the IRP functions array
 127  * ARGUMENTS:
 128  *           DriverObject = object describing this driver
 129  * RETURNS: Nothing
 130  */
 131 INIT_SECTION
 132 VOID
 133 NTAPI
 134 NtfsInitializeFunctionPointers(PDRIVER_OBJECT DriverObject)
 135 {
 136     DriverObject->MajorFunction[IRP_MJ_CREATE]                   = NtfsFsdDispatch;
 137     DriverObject->MajorFunction[IRP_MJ_CLOSE]                    = NtfsFsdDispatch;
 138     DriverObject->MajorFunction[IRP_MJ_CLEANUP]                  = NtfsFsdDispatch;
 139     DriverObject->MajorFunction[IRP_MJ_READ]                     = NtfsFsdDispatch;
 140     DriverObject->MajorFunction[IRP_MJ_WRITE]                    = NtfsFsdDispatch;
 141     DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION]        = NtfsFsdDispatch;
 142     DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = NtfsFsdDispatch;
 143     DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION]   = NtfsFsdDispatch;
 144     DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL]        = NtfsFsdDispatch;
 145     DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL]      = NtfsFsdDispatch;
 146     DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL]           = NtfsFsdDispatch;
 147
 148     return;
 149 }
 150
 151 /* EOF */