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08da4a07b0
Implement reading by polling (expect lots of bugs!) Use receive and send queues Better handling of some IRPs Lots of small bugs fixes svn path=/trunk/; revision=14177
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/* $Id:
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: drivers/dd/serial/info.c
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* PURPOSE: Serial IRP_MJ_QUERY_INFORMATION operations
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*
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* PROGRAMMERS: Hervé Poussineau (poussine@freesurf.fr)
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*/
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#define NDEBUG2
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#include "serial.h"
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NTSTATUS STDCALL
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SerialQueryInformation(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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PSERIAL_DEVICE_EXTENSION DeviceExtension;
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PIO_STACK_LOCATION Stack;
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PVOID SystemBuffer;
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ULONG BufferLength;
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ULONG Information = 0;
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NTSTATUS Status;
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DeviceExtension = (PSERIAL_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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Stack = IoGetCurrentIrpStackLocation(Irp);
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SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
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BufferLength = Stack->Parameters.QueryFile.Length;
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switch (Stack->Parameters.QueryFile.FileInformationClass)
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{
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case FileStandardInformation:
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{
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PFILE_STANDARD_INFORMATION StandardInfo = (PFILE_STANDARD_INFORMATION)SystemBuffer;
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DPRINT("Serial: IRP_MJ_QUERY_INFORMATION / FileStandardInformation\n");
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if (BufferLength < sizeof(FILE_STANDARD_INFORMATION))
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Status = STATUS_BUFFER_OVERFLOW;
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else
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{
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StandardInfo->AllocationSize.QuadPart = 0;
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StandardInfo->EndOfFile.QuadPart = 0;
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StandardInfo->Directory = FALSE;
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StandardInfo->NumberOfLinks = 0;
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StandardInfo->DeletePending = FALSE; /* FIXME: should be TRUE sometimes */
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Status = STATUS_SUCCESS;
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}
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break;
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}
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case FilePositionInformation:
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{
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PFILE_POSITION_INFORMATION PositionInfo = (PFILE_POSITION_INFORMATION)SystemBuffer;
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DPRINT("Serial: IRP_MJ_QUERY_INFORMATION / FilePositionInformation\n");
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if (BufferLength < sizeof(PFILE_POSITION_INFORMATION))
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Status = STATUS_BUFFER_OVERFLOW;
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else
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{
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PositionInfo->CurrentByteOffset.QuadPart = 0;
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Status = STATUS_SUCCESS;
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}
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break;
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}
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default:
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{
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DPRINT("Serial: IRP_MJ_QUERY_INFORMATION: Unexpected file information class 0x%02x\n", Stack->Parameters.QueryFile.FileInformationClass);
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return ForwardIrpAndForget(DeviceObject, Irp);
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}
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}
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Irp->IoStatus.Information = Information;
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Irp->IoStatus.Status = Status;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return Status;
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}
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