reactos/drivers/fs/ntfs/blockdev.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/blockdev.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 NTSTATUS
  41 NtfsReadSectors(IN PDEVICE_OBJECT DeviceObject,
  42                 IN ULONG DiskSector,
  43                 IN ULONG SectorCount,
  44                 IN ULONG SectorSize,
  45                 IN OUT PUCHAR Buffer,
  46                 IN BOOLEAN Override)
  47 {
  48   PIO_STACK_LOCATION Stack;
  49   IO_STATUS_BLOCK IoStatus;
  50   LARGE_INTEGER Offset;
  51   ULONG BlockSize;
  52   KEVENT Event;
  53   PIRP Irp;
  54   NTSTATUS Status;
  55
  56   KeInitializeEvent(&Event,
  57                     NotificationEvent,
  58                     FALSE);
  59
  60   Offset.QuadPart = (LONGLONG)DiskSector * (LONGLONG)SectorSize;
  61   BlockSize = SectorCount * SectorSize;
  62
  63   DPRINT("NtfsReadSectors(DeviceObject %x, DiskSector %d, Buffer %x)\n",
  64          DeviceObject, DiskSector, Buffer);
  65   DPRINT("Offset %I64x BlockSize %ld\n",
  66          Offset.QuadPart,
  67          BlockSize);
  68
  69   DPRINT("Building synchronous FSD Request...\n");
  70   Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
  71                                      DeviceObject,
  72                                      Buffer,
  73                                      BlockSize,
  74                                      &Offset,
  75                                      &Event,
  76                                      &IoStatus);
  77   if (Irp == NULL)
  78     {
  79       DPRINT("IoBuildSynchronousFsdRequest failed\n");
  80       return STATUS_INSUFFICIENT_RESOURCES;
  81     }
  82
  83   if (Override)
  84     {
  85       Stack = IoGetNextIrpStackLocation(Irp);
  86       Stack->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
  87     }
  88
  89   DPRINT("Calling IO Driver... with irp %x\n", Irp);
  90   Status = IoCallDriver(DeviceObject, Irp);
  91
  92   DPRINT("Waiting for IO Operation for %x\n", Irp);
  93   if (Status == STATUS_PENDING)
  94     {
  95       DPRINT("Operation pending\n");
  96       KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
  97       DPRINT("Getting IO Status... for %x\n", Irp);
  98       Status = IoStatus.Status;
  99     }
 100
 101   DPRINT("NtfsReadSectors() done (Status %x)\n", Status);
 102
 103   return Status;
 104 }
 105
 106
 107 NTSTATUS
 108 NtfsDeviceIoControl(IN PDEVICE_OBJECT DeviceObject,
 109                     IN ULONG ControlCode,
 110                     IN PVOID InputBuffer,
 111                     IN ULONG InputBufferSize,
 112                     IN OUT PVOID OutputBuffer,
 113                     IN OUT PULONG OutputBufferSize,
 114                     IN BOOLEAN Override)
 115 {
 116   PIO_STACK_LOCATION Stack;
 117   IO_STATUS_BLOCK IoStatus;
 118   KEVENT Event;
 119   PIRP Irp;
 120   NTSTATUS Status;
 121
 122   KeInitializeEvent(&Event, NotificationEvent, FALSE);
 123
 124   DPRINT("Building device I/O control request ...\n");
 125   Irp = IoBuildDeviceIoControlRequest(ControlCode,
 126                                       DeviceObject,
 127                                       InputBuffer,
 128                                       InputBufferSize,
 129                                       OutputBuffer,
 130                                       (OutputBufferSize) ? *OutputBufferSize : 0,
 131                                       FALSE,
 132                                       &Event,
 133                                       &IoStatus);
 134   if (Irp == NULL)
 135     {
 136       DPRINT("IoBuildDeviceIoControlRequest() failed\n");
 137       return STATUS_INSUFFICIENT_RESOURCES;
 138     }
 139
 140   if (Override)
 141     {
 142       Stack = IoGetNextIrpStackLocation(Irp);
 143       Stack->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
 144     }
 145
 146   DPRINT("Calling IO Driver... with irp %x\n", Irp);
 147   Status = IoCallDriver(DeviceObject, Irp);
 148   if (Status == STATUS_PENDING)
 149     {
 150       KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
 151       Status = IoStatus.Status;
 152     }
 153
 154   if (OutputBufferSize)
 155     {
 156       *OutputBufferSize = IoStatus.Information;
 157     }
 158
 159   return Status;
 160 }
 161
 162 /* EOF */