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
  39 /* FUNCTIONS ****************************************************************/
  40
  41 /*
  42  * FUNCTION: Called by the system to initialize the driver
  43  * ARGUMENTS:
  44  *           DriverObject = object describing this driver
  45  *           RegistryPath = path to our configuration entries
  46  * RETURNS: Success or failure
  47  */
  48 NTSTATUS
  49 NTAPI
  50 DriverEntry(PDRIVER_OBJECT DriverObject,
  51             PUNICODE_STRING RegistryPath)
  52 {
  53     UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(DEVICE_NAME);
  54     NTSTATUS Status;
  55
  56     TRACE_(NTFS, "DriverEntry(%p, '%wZ')\n", DriverObject, RegistryPath);
  57
  58     /* Initialize global data */
  59     NtfsGlobalData = ExAllocatePoolWithTag(NonPagedPool, sizeof(NTFS_GLOBAL_DATA), 'GRDN');
  60     if (!NtfsGlobalData)
  61     {
  62         Status = STATUS_INSUFFICIENT_RESOURCES;
  63         goto ErrorEnd;
  64     }
  65
  66     RtlZeroMemory(NtfsGlobalData, sizeof(NTFS_GLOBAL_DATA));
  67     NtfsGlobalData->Identifier.Type = NTFS_TYPE_GLOBAL_DATA;
  68     NtfsGlobalData->Identifier.Size = sizeof(NTFS_GLOBAL_DATA);
  69
  70     ExInitializeResourceLite(&NtfsGlobalData->Resource);
  71
  72     /* Keep trace of Driver Object */
  73     NtfsGlobalData->DriverObject = DriverObject;
  74
  75     /* Initialize IRP functions array */
  76     NtfsInitializeFunctionPointers(DriverObject);
  77
  78     /* Initialize CC functions array */
  79     NtfsGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = NtfsAcqLazyWrite;
  80     NtfsGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = NtfsRelLazyWrite;
  81     NtfsGlobalData->CacheMgrCallbacks.AcquireForReadAhead = NtfsAcqReadAhead;
  82     NtfsGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = NtfsRelReadAhead;
  83
  84     /* Driver can't be unloaded */
  85     DriverObject->DriverUnload = NULL;
  86
  87     Status = IoCreateDevice(DriverObject,
  88                             sizeof(NTFS_GLOBAL_DATA),
  89                             &DeviceName,
  90                             FILE_DEVICE_DISK_FILE_SYSTEM,
  91                             0,
  92                             FALSE,
  93                             &NtfsGlobalData->DeviceObject);
  94     if (!NT_SUCCESS(Status))
  95     {
  96         WARN_(NTFS, "IoCreateDevice failed with status: %lx\n", Status);
  97         goto ErrorEnd;
  98     }
  99
 100     NtfsGlobalData->DeviceObject->Flags |= DO_DIRECT_IO;
 101
 102     /* Register file system */
 103     IoRegisterFileSystem(NtfsGlobalData->DeviceObject);
 104     ObReferenceObject(NtfsGlobalData->DeviceObject);
 105
 106 ErrorEnd:
 107     if (!NT_SUCCESS(Status))
 108     {
 109         if (NtfsGlobalData)
 110         {
 111             ExDeleteResourceLite(&NtfsGlobalData->Resource);
 112             ExFreePoolWithTag(NtfsGlobalData, 'GRDN');
 113         }
 114     }
 115
 116     return Status;
 117 }
 118
 119
 120 /*
 121  * FUNCTION: Called within the driver entry to initialize the IRP functions array
 122  * ARGUMENTS:
 123  *           DriverObject = object describing this driver
 124  * RETURNS: Nothing
 125  */
 126 VOID
 127 NTAPI
 128 NtfsInitializeFunctionPointers(PDRIVER_OBJECT DriverObject)
 129 {
 130     DriverObject->MajorFunction[IRP_MJ_CREATE]                   = NtfsFsdCreate;
 131     DriverObject->MajorFunction[IRP_MJ_CLOSE]                    = NtfsFsdClose;
 132     DriverObject->MajorFunction[IRP_MJ_READ]                     = NtfsFsdRead;
 133     DriverObject->MajorFunction[IRP_MJ_WRITE]                    = NtfsFsdWrite;
 134     DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION]        = NtfsFsdQueryInformation;
 135     DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = NtfsFsdDispatch;
 136     DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION]   = NtfsFsdDispatch;
 137     DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL]        = NtfsFsdDirectoryControl;
 138     DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL]      = NtfsFsdFileSystemControl;
 139
 140     return;
 141 }
 142
 143 /* EOF */