drivers/serial/serial/info.c

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