drivers/fs/ntfs/mft.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., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /* $Id$
  20  *
  21  * COPYRIGHT:        See COPYING in the top level directory
  22  * PROJECT:          ReactOS kernel
  23  * FILE:             services/fs/ntfs/mft.c
  24  * PURPOSE:          NTFS filesystem driver
  25  * PROGRAMMER:       Eric Kohl
  26  */
  27
  28 /* INCLUDES *****************************************************************/
  29
  30 #include <ddk/ntddk.h>
  31
  32 //#define NDEBUG
  33 #include <debug.h>
  34
  35 #include "ntfs.h"
  36
  37
  38 /* FUNCTIONS ****************************************************************/
  39
  40
  41 NTSTATUS
  42 NtfsOpenMft(PDEVICE_OBJECT DeviceObject,
  43             PDEVICE_EXTENSION Vcb)
  44 {
  45   PVOID Buffer;
  46   PFILE_RECORD_HEADER RecordHeader;
  47   PATTRIBUTE Attribute;
  48   NTSTATUS Status;
  49
  50   DPRINT1("NtfsOpenMft() called\n");
  51
  52   Buffer = ExAllocatePool(NonPagedPool,
  53                           Vcb->NtfsInfo.BytesPerCluster);
  54   if (Buffer == NULL)
  55     {
  56       return(STATUS_INSUFFICIENT_RESOURCES);
  57     }
  58
  59
  60   /* read first MFT cluster */
  61   Status = NtfsReadRawSectors(DeviceObject,
  62                               Vcb->NtfsInfo.MftStart.u.LowPart * Vcb->NtfsInfo.SectorsPerCluster,
  63                               Vcb->NtfsInfo.SectorsPerCluster,
  64                               Vcb->NtfsInfo.BytesPerSector,
  65                               (PVOID)Buffer);
  66   if (NT_SUCCESS(Status))
  67     {
  68       /* Enumerate MFT records */
  69       RecordHeader = Buffer;
  70       while (((ULONG)RecordHeader - (ULONG)Buffer) < Vcb->NtfsInfo.BytesPerCluster)
  71         {
  72           DbgPrint("\n");
  73 //        DbgPrint("Magic: %.04s\n", (PCHAR)&RecordHeader->Ntfs.Type);
  74 //        DbgPrint("Real size: %lx\n", RecordHeader->RealSize);
  75 //        DbgPrint("AllocSize: %lx\n", RecordHeader->AllocSize);
  76
  77           /* Enumerate attributes */
  78           Attribute = (PATTRIBUTE)((ULONG)RecordHeader +
  79                                    RecordHeader->Ntfs.UsnOffset +
  80                                    RecordHeader->Ntfs.UsnSize * sizeof(USHORT));
  81           while (Attribute->AttributeType != 0xFFFFFFFF)
  82             {
  83               NtfsDumpAttribute(Attribute);
  84
  85               Attribute = (PATTRIBUTE)((ULONG)Attribute + Attribute->Length);
  86             }
  87
  88
  89           RecordHeader = (PFILE_RECORD_HEADER)((ULONG)RecordHeader + RecordHeader->BytesAllocated);
  90         }
  91
  92     }
  93
  94   ExFreePool(Buffer);
  95
  96   return(Status);
  97 }
  98
  99
 100 /* EOF */