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
  39 /* FUNCTIONS ****************************************************************/
  40
  41 NTSTATUS NTAPI
  42 DriverEntry(PDRIVER_OBJECT DriverObject,
  43             PUNICODE_STRING RegistryPath)
  44 /*
  45  * FUNCTION: Called by the system to initalize the driver
  46  * ARGUMENTS:
  47  *           DriverObject = object describing this driver
  48  *           RegistryPath = path to our configuration entries
  49  * RETURNS: Success or failure
  50  */
  51 {
  52   NTSTATUS Status;
  53   UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(DEVICE_NAME);
  54
  55   TRACE_(NTFS, "DriverEntry(%p, '%wZ')\n", DriverObject, RegistryPath);
  56
  57   /* Initialize global data */
  58   NtfsGlobalData = ExAllocatePoolWithTag(NonPagedPool, sizeof(NTFS_GLOBAL_DATA), 'GRDN');
  59   if (!NtfsGlobalData)
  60   {
  61     Status = STATUS_INSUFFICIENT_RESOURCES;
  62     goto ErrorEnd;
  63   }
  64   RtlZeroMemory(NtfsGlobalData, sizeof(NTFS_GLOBAL_DATA));
  65   NtfsGlobalData->Identifier.Type = NTFS_TYPE_GLOBAL_DATA;
  66   NtfsGlobalData->Identifier.Size = sizeof(NTFS_GLOBAL_DATA);
  67
  68   ExInitializeResourceLite(&NtfsGlobalData->Resource);
  69
  70   /* Keep trace of Driver Object */
  71   NtfsGlobalData->DriverObject = DriverObject;
  72
  73   /* Initialize IRP functions array */
  74   NtfsInitializeFunctionPointers(DriverObject);
  75
  76   /* Initialize CC functions array */
  77   NtfsGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = NtfsAcqLazyWrite;
  78   NtfsGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = NtfsRelLazyWrite;
  79   NtfsGlobalData->CacheMgrCallbacks.AcquireForReadAhead = NtfsAcqReadAhead;
  80   NtfsGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = NtfsRelReadAhead;
  81
  82   /* Driver can't be unloaded */
  83   DriverObject->DriverUnload = NULL;
  84
  85   Status = IoCreateDevice(DriverObject,
  86                           sizeof(NTFS_GLOBAL_DATA),
  87                           &DeviceName,
  88                           FILE_DEVICE_DISK_FILE_SYSTEM,
  89                           0,
  90                           FALSE,
  91                           &NtfsGlobalData->DeviceObject);
  92   if (!NT_SUCCESS(Status))
  93   {
  94     WARN_(NTFS, "IoCreateDevice failed with status: %lx\n", Status);
  95     goto ErrorEnd;
  96   }
  97
  98   NtfsGlobalData->DeviceObject->Flags |= DO_DIRECT_IO;
  99
 100   /* Register file system */
 101   IoRegisterFileSystem(NtfsGlobalData->DeviceObject);
 102   ObReferenceObject(NtfsGlobalData->DeviceObject);
 103
 104 ErrorEnd:
 105   if (!NT_SUCCESS(Status))
 106   {
 107     if (NtfsGlobalData)
 108     {
 109       ExDeleteResourceLite(&NtfsGlobalData->Resource);
 110       ExFreePoolWithTag(NtfsGlobalData, 'GRDN');
 111     }
 112   }
 113
 114   return Status;
 115 }
 116
 117 VOID NTAPI
 118 NtfsInitializeFunctionPointers(PDRIVER_OBJECT DriverObject)
 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 {
 126   DriverObject->MajorFunction[IRP_MJ_CREATE]                   = NtfsFsdCreate;
 127   DriverObject->MajorFunction[IRP_MJ_CLOSE]                    = NtfsFsdClose;
 128   DriverObject->MajorFunction[IRP_MJ_READ]                     = NtfsFsdRead;
 129   DriverObject->MajorFunction[IRP_MJ_WRITE]                    = NtfsFsdWrite;
 130   DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION]        = NtfsFsdQueryInformation;
 131   DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = NtfsFsdDispatch;
 132   DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION]   = NtfsFsdDispatch;
 133   DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL]        = NtfsFsdDirectoryControl;
 134   DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL]      = NtfsFsdFileSystemControl;
 135
 136   return;
 137 }
 138