fxfileobjectkm.cpp

Go to the documentation of this file.

/*++
 
Copyright (c) Microsoft Corporation
 
Module Name:
 
    FxFileObjectKm.hpp
 
Abstract:
 
    This module implements a frameworks managed FileObject
 
Author:
 
 
 
Environment:
 
    Kernel mode only
 
Revision History:
 
 
--*/
 
#include "coreprivshared.hpp"
 
// Tracing support
extern "C" {
// #include "FxFileObjectKm.tmh"
}
 
VOID
FxFileObject::SetFileObjectContext(
    _In_ MdFileObject WdmFileObject,
    _In_ WDF_FILEOBJECT_CLASS NormalizedFileClass,
    _In_ MdIrp Irp,
    _In_ FxDevice* Device
    )
{
    MxFileObject wdmFileObject(WdmFileObject);
 
    UNREFERENCED_PARAMETER(Irp);
    UNREFERENCED_PARAMETER(Device);
 
    //
    // We now must be able to quickly retrieve the FxFileObject*
    // from the WDM PFILE_OBJECT when we get I/O requests.
    //
    // But different driver stacks have different rules, so
    // we must be flexible here, including not touching the
    // WDM PFILE_OBJECT at all.
    //
    if( NormalizedFileClass == WdfFileObjectWdfCanUseFsContext ) {
        wdmFileObject.SetFsContext(this);
    }
    else if( NormalizedFileClass == WdfFileObjectWdfCanUseFsContext2 ) {
        wdmFileObject.SetFsContext2(this);
    }
    else {
        //
        // WdfDeviceFileObjectNoContext will look up the FxFileObject
        // from the FxDevice->m_FileObjectListHead at runtime.
        //
    }
}
 
VOID
FxFileObject::Initialize(
    _In_ MdIrp CreateIrp
    )
{
    UNREFERENCED_PARAMETER(CreateIrp);
 
    //
    // Not needed for KMDF.
    //
    DO_NOTHING();
 
    return;
}
 
_Must_inspect_result_
NTSTATUS
FxFileObject::UpdateProcessKeepAliveCount(
    _In_ BOOLEAN Increment
    )
{
    UNREFERENCED_PARAMETER(Increment);
 
    //
    // Not needed for KMDF.
    //
    DO_NOTHING();
 
    return STATUS_NOT_IMPLEMENTED;
}