127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/***************************************************************************
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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Dot4Usb.sys - Lower Filter Driver for Dot4.sys for USB connected
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IEEE 1284.4 devices.
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File Name:
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OpenClos.c
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Abstract:
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Dispatch routines for IRP_MJ_CREATE and IRP_MJ_CLOSE
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Environment:
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Kernel mode only
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Notes:
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THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
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KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
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PURPOSE.
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Copyright (c) 2000 Microsoft Corporation. All Rights Reserved.
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Revision History:
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01/18/2000 : created
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Author(s):
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Doug Fritz (DFritz)
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Joby Lafky (JobyL)
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****************************************************************************/
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#include "pch.h"
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/************************************************************************/
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/* DispatchCreate */
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/************************************************************************/
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//
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// Routine Description:
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//
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// Dispatch routine for IRP_MJ_CREATE
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//
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// Arguments:
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//
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// DevObj - pointer to Device Object that is the target of the create
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// Irp - pointer to the create IRP
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//
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// Return Value:
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//
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// NTSTATUS
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//
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/************************************************************************/
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NTSTATUS
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DispatchCreate(
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IN PDEVICE_OBJECT DevObj,
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IN PIRP Irp
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)
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{
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PDEVICE_EXTENSION devExt = DevObj->DeviceExtension;
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NTSTATUS status = IoAcquireRemoveLock( &devExt->RemoveLock, Irp );
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TR_VERBOSE(("DispatchCreate"));
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if( NT_SUCCESS(status) ) {
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IoSkipCurrentIrpStackLocation( Irp );
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status = IoCallDriver( devExt->LowerDevObj, Irp );
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IoReleaseRemoveLock( &devExt->RemoveLock, Irp );
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} else {
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// unable to acquire RemoveLock - fail CREATE
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Irp->IoStatus.Status = status;
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IoCompleteRequest( Irp, IO_NO_INCREMENT );
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}
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return status;
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}
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/************************************************************************/
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/* DispatchClose */
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/************************************************************************/
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//
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// Routine Description:
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//
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// Dispatch routine for IRP_MJ_CLOSE
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//
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// Arguments:
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//
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// DevObj - pointer to Device Object that is the target of the close
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// Irp - pointer to the close IRP
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//
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// Return Value:
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//
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// NTSTATUS
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//
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/************************************************************************/
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NTSTATUS
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DispatchClose(
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IN PDEVICE_OBJECT DevObj,
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IN PIRP Irp
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)
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{
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PDEVICE_EXTENSION devExt = DevObj->DeviceExtension;
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NTSTATUS status = IoAcquireRemoveLock( &devExt->RemoveLock, Irp );
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TR_VERBOSE(("DispatchClose"));
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if( NT_SUCCESS(status) ) {
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IoSkipCurrentIrpStackLocation( Irp );
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status = IoCallDriver( devExt->LowerDevObj, Irp );
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IoReleaseRemoveLock( &devExt->RemoveLock, Irp );
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} else {
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// unable to acquire RemoveLock - succeed CLOSE anyway
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Irp->IoStatus.Status = STATUS_SUCCESS;
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IoCompleteRequest( Irp, IO_NO_INCREMENT );
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}
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return status;
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}
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