drivers/filesystems/npfs/volume.c

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