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 #include <debug.h>
  13
  14 NTSTATUS NTAPI
  15 SerialQueryInformation(
  16         IN PDEVICE_OBJECT DeviceObject,
  17         IN PIRP Irp)
  18 {
  19         PIO_STACK_LOCATION Stack;
  20         PVOID SystemBuffer;
  21         ULONG BufferLength;
  22         ULONG_PTR Information = 0;
  23         NTSTATUS Status;
  24
  25         Stack = IoGetCurrentIrpStackLocation(Irp);
  26         SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
  27         BufferLength = Stack->Parameters.QueryFile.Length;
  28
  29         switch (Stack->Parameters.QueryFile.FileInformationClass)
  30         {
  31                 case FileStandardInformation:
  32                 {
  33                         PFILE_STANDARD_INFORMATION StandardInfo = (PFILE_STANDARD_INFORMATION)SystemBuffer;
  34
  35                         TRACE_(SERIAL, "IRP_MJ_QUERY_INFORMATION / FileStandardInformation\n");
  36                         if (BufferLength < sizeof(FILE_STANDARD_INFORMATION))
  37                                 Status = STATUS_BUFFER_OVERFLOW;
  38                         else if (!StandardInfo)
  39                                 Status = STATUS_INVALID_PARAMETER;
  40                         else
  41                         {
  42                                 StandardInfo->AllocationSize.QuadPart = 0;
  43                                 StandardInfo->EndOfFile.QuadPart = 0;
  44                                 StandardInfo->Directory = FALSE;
  45                                 StandardInfo->NumberOfLinks = 0;
  46                                 StandardInfo->DeletePending = FALSE; /* FIXME: should be TRUE sometimes */
  47                                 Information = sizeof(FILE_STANDARD_INFORMATION);
  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                         TRACE_(SERIAL, "IRP_MJ_QUERY_INFORMATION / FilePositionInformation\n");
  59                         if (BufferLength < sizeof(FILE_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                                 Information = sizeof(FILE_POSITION_INFORMATION);
  67                                 Status = STATUS_SUCCESS;
  68                         }
  69                         break;
  70                 }
  71                 default:
  72                 {
  73                         TRACE_(SERIAL, "IRP_MJ_QUERY_INFORMATION: Unexpected file information class 0x%02x\n", Stack->Parameters.QueryFile.FileInformationClass);
  74                         return ForwardIrpAndForget(DeviceObject, Irp);
  75                 }
  76         }
  77
  78         Irp->IoStatus.Information = Information;
  79         Irp->IoStatus.Status = Status;
  80         IoCompleteRequest(Irp, IO_NO_INCREMENT);
  81         return Status;
  82 }