reactos/drivers/dd/serial/info.c

   1 /* $Id:
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            drivers/dd/serial/info.c
   6  * PURPOSE:         Serial IRP_MJ_QUERY_INFORMATION operations
   7  *
   8  * PROGRAMMERS:     Hervé Poussineau (poussine@freesurf.fr)
   9  */
  10
  11 #define NDEBUG2
  12 #include "serial.h"
  13
  14 NTSTATUS STDCALL
  15 SerialQueryInformation(
  16         IN PDEVICE_OBJECT DeviceObject,
  17         IN PIRP Irp)
  18 {
  19         PSERIAL_DEVICE_EXTENSION DeviceExtension;
  20         PIO_STACK_LOCATION Stack;
  21         PVOID SystemBuffer;
  22         ULONG BufferLength;
  23         ULONG_PTR Information = 0;
  24         NTSTATUS Status;
  25
  26         DeviceExtension = (PSERIAL_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
  27         Stack = IoGetCurrentIrpStackLocation(Irp);
  28         SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
  29         BufferLength = Stack->Parameters.QueryFile.Length;
  30
  31         switch (Stack->Parameters.QueryFile.FileInformationClass)
  32         {
  33                 case FileStandardInformation:
  34                 {
  35                         PFILE_STANDARD_INFORMATION StandardInfo = (PFILE_STANDARD_INFORMATION)SystemBuffer;
  36
  37                         DPRINT("Serial: IRP_MJ_QUERY_INFORMATION / FileStandardInformation\n");
  38                         if (BufferLength < sizeof(FILE_STANDARD_INFORMATION))
  39                                 Status = STATUS_BUFFER_OVERFLOW;
  40                         else if (!StandardInfo)
  41                                 Status = STATUS_INVALID_PARAMETER;
  42                         {
  43                                 StandardInfo->AllocationSize.QuadPart = 0;
  44                                 StandardInfo->EndOfFile.QuadPart = 0;
  45                                 StandardInfo->Directory = FALSE;
  46                                 StandardInfo->NumberOfLinks = 0;
  47                                 StandardInfo->DeletePending = FALSE; /* FIXME: should be TRUE sometimes */
  48                                 Status = STATUS_SUCCESS;
  49                         }
  50                         break;
  51                 }
  52                 case FilePositionInformation:
  53                 {
  54                         PFILE_POSITION_INFORMATION PositionInfo = (PFILE_POSITION_INFORMATION)SystemBuffer;
  55
  56                         ASSERT(PositionInfo);
  57
  58                         DPRINT("Serial: IRP_MJ_QUERY_INFORMATION / FilePositionInformation\n");
  59                         if (BufferLength < sizeof(PFILE_POSITION_INFORMATION))
  60                                 Status = STATUS_BUFFER_OVERFLOW;
  61                         else if (!PositionInfo)
  62                                 Status = STATUS_INVALID_PARAMETER;
  63                         else
  64                         {
  65                                 PositionInfo->CurrentByteOffset.QuadPart = 0;
  66                                 Status = STATUS_SUCCESS;
  67                         }
  68                         break;
  69                 }
  70                 default:
  71                 {
  72                         DPRINT("Serial: IRP_MJ_QUERY_INFORMATION: Unexpected file information class 0x%02x\n", Stack->Parameters.QueryFile.FileInformationClass);
  73                         return ForwardIrpAndForget(DeviceObject, Irp);
  74                 }
  75         }
  76
  77         Irp->IoStatus.Information = Information;
  78         Irp->IoStatus.Status = Status;
  79         IoCompleteRequest(Irp, IO_NO_INCREMENT);
  80         return Status;
  81 }