drivers/fs/np/volume.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:        See COPYING in the top level directory
   4  * PROJECT:          ReactOS kernel
   5  * FILE:             services/fs/npfs/volume.c
   6  * PURPOSE:          Named pipe filesystem
   7  * PROGRAMMER:       Eric Kohl <ekohl@rz-online.de>
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include <ddk/ntddk.h>
  13 #include <wchar.h>
  14
  15 #define NDEBUG
  16 #include <debug.h>
  17
  18 #include "npfs.h"
  19
  20 /* FUNCTIONS ****************************************************************/
  21
  22 static NTSTATUS
  23 NpfsQueryFsDeviceInformation(PFILE_FS_DEVICE_INFORMATION FsDeviceInfo,
  24                              PULONG BufferLength)
  25 {
  26    DPRINT("NpfsQueryFsDeviceInformation()\n");
  27    DPRINT("FsDeviceInfo = %p\n", FsDeviceInfo);
  28
  29    if (*BufferLength < sizeof(FILE_FS_DEVICE_INFORMATION))
  30      return(STATUS_BUFFER_OVERFLOW);
  31
  32    FsDeviceInfo->DeviceType = FILE_DEVICE_NAMED_PIPE;
  33    FsDeviceInfo->Characteristics = 0;
  34
  35    *BufferLength -= sizeof(FILE_FS_DEVICE_INFORMATION);
  36
  37    DPRINT("NpfsQueryFsDeviceInformation() finished.\n");
  38
  39    return(STATUS_SUCCESS);
  40 }
  41
  42
  43 static NTSTATUS
  44 NpfsQueryFsAttributeInformation(PFILE_FS_ATTRIBUTE_INFORMATION FsAttributeInfo,
  45                                 PULONG BufferLength)
  46 {
  47    DPRINT("NpfsQueryFsAttributeInformation() called.\n");
  48    DPRINT("FsAttributeInfo = %p\n", FsAttributeInfo);
  49
  50    if (*BufferLength < sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8)
  51      return(STATUS_BUFFER_OVERFLOW);
  52
  53    FsAttributeInfo->FileSystemAttributes = FILE_CASE_PRESERVED_NAMES;
  54    FsAttributeInfo->MaximumComponentNameLength = 255;
  55    FsAttributeInfo->FileSystemNameLength = 8;
  56    wcscpy(FsAttributeInfo->FileSystemName,
  57           L"NPFS");
  58
  59    DPRINT("NpfsQueryFsAttributeInformation() finished.\n");
  60    *BufferLength -= (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8);
  61
  62    return(STATUS_SUCCESS);
  63 }
  64
  65
  66 NTSTATUS STDCALL
  67 NpfsQueryVolumeInformation(PDEVICE_OBJECT DeviceObject,
  68                            PIRP Irp)
  69 {
  70    PIO_STACK_LOCATION Stack;
  71    FS_INFORMATION_CLASS FsInformationClass;
  72    NTSTATUS Status = STATUS_SUCCESS;
  73    PVOID SystemBuffer;
  74    ULONG BufferLength;
  75
  76    /* PRECONDITION */
  77    assert(DeviceObject != NULL);
  78    assert(Irp != NULL);
  79
  80    DPRINT("NpfsQueryVolumeInformation(DeviceObject %x, Irp %x)\n",
  81           DeviceObject,
  82           Irp);
  83
  84    Stack = IoGetCurrentIrpStackLocation (Irp);
  85    FsInformationClass = Stack->Parameters.QueryVolume.FsInformationClass;
  86    BufferLength = Stack->Parameters.QueryVolume.Length;
  87    SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
  88
  89    DPRINT("FsInformationClass %d\n", FsInformationClass);
  90    DPRINT("SystemBuffer %x\n", SystemBuffer);
  91
  92    switch (FsInformationClass)
  93      {
  94      case FileFsDeviceInformation:
  95        Status = NpfsQueryFsDeviceInformation(SystemBuffer,
  96                                              &BufferLength);
  97        break;
  98
  99      case FileFsAttributeInformation:
 100        Status = NpfsQueryFsAttributeInformation(SystemBuffer,
 101                                                 &BufferLength);
 102        break;
 103
 104      default:
 105        Status = STATUS_NOT_SUPPORTED;
 106      }
 107
 108    Irp->IoStatus.Status = Status;
 109    if (NT_SUCCESS(Status))
 110      Irp->IoStatus.Information =
 111        Stack->Parameters.QueryVolume.Length - BufferLength;
 112    else
 113      Irp->IoStatus.Information = 0;
 114    IoCompleteRequest(Irp,
 115                      IO_NO_INCREMENT);
 116
 117    return(Status);
 118 }
 119
 120 /* EOF */