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
  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
  65     RtlZeroMemory(NtfsGlobalData, sizeof(NTFS_GLOBAL_DATA));
  66     NtfsGlobalData->Identifier.Type = NTFS_TYPE_GLOBAL_DATA;
  67     NtfsGlobalData->Identifier.Size = sizeof(NTFS_GLOBAL_DATA);
  68
  69     ExInitializeResourceLite(&NtfsGlobalData->Resource);
  70
  71     /* Keep trace of Driver Object */
  72     NtfsGlobalData->DriverObject = DriverObject;
  73
  74     /* Initialize IRP functions array */
  75     NtfsInitializeFunctionPointers(DriverObject);
  76
  77     /* Initialize CC functions array */
  78     NtfsGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = NtfsAcqLazyWrite;
  79     NtfsGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = NtfsRelLazyWrite;
  80     NtfsGlobalData->CacheMgrCallbacks.AcquireForReadAhead = NtfsAcqReadAhead;
  81     NtfsGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = NtfsRelReadAhead;
  82
  83     /* Driver can't be unloaded */
  84     DriverObject->DriverUnload = NULL;
  85
  86     Status = IoCreateDevice(DriverObject,
  87                             sizeof(NTFS_GLOBAL_DATA),
  88                             &DeviceName,
  89                             FILE_DEVICE_DISK_FILE_SYSTEM,
  90                             0,
  91                             FALSE,
  92                             &NtfsGlobalData->DeviceObject);
  93     if (!NT_SUCCESS(Status))
  94     {
  95         WARN_(NTFS, "IoCreateDevice failed with status: %lx\n", Status);
  96         goto ErrorEnd;
  97     }
  98
  99     NtfsGlobalData->DeviceObject->Flags |= DO_DIRECT_IO;
 100
 101     /* Register file system */
 102     IoRegisterFileSystem(NtfsGlobalData->DeviceObject);
 103     ObReferenceObject(NtfsGlobalData->DeviceObject);
 104
 105 ErrorEnd:
 106     if (!NT_SUCCESS(Status))
 107     {
 108         if (NtfsGlobalData)
 109         {
 110             ExDeleteResourceLite(&NtfsGlobalData->Resource);
 111             ExFreePoolWithTag(NtfsGlobalData, 'GRDN');
 112         }
 113     }
 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]                   = NtfsFsdCreate;
 130     DriverObject->MajorFunction[IRP_MJ_CLOSE]                    = NtfsFsdClose;
 131     DriverObject->MajorFunction[IRP_MJ_READ]                     = NtfsFsdRead;
 132     DriverObject->MajorFunction[IRP_MJ_WRITE]                    = NtfsFsdWrite;
 133     DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION]        = NtfsFsdQueryInformation;
 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]        = NtfsFsdDirectoryControl;
 137     DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL]      = NtfsFsdFileSystemControl;
 138
 139     return;
 140 }
 141
 142 /* EOF */