mirror of
https://github.com/reactos/reactos.git
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195 lines
4.1 KiB
C++
195 lines
4.1 KiB
C++
/*++
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Copyright (c) Microsoft Corporation
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Module Name:
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FxObjectUm.cpp
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Abstract:
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User mode implementations of FxObject APIs
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Author:
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Environment:
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user mode only
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Revision History:
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--*/
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#include "fxobjectpch.hpp"
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extern "C" {
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#if defined(EVENT_TRACING)
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#include "FxObjectUm.tmh"
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#endif
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}
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extern "C" {
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#define INITGUID
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#include <guiddef.h>
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#include <WdfFileObject_private.h>
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//
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// Function declarations for the WdfObjectQuery DDIs
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//
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_IRQL_requires_max_(PASSIVE_LEVEL)
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WDFAPI
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NTSTATUS
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WDFEXPORT(WdfFileObjectIncrementProcessKeepAliveCount)(
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_In_
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PWDF_DRIVER_GLOBALS DriverGlobals,
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_In_
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WDFFILEOBJECT FileObject
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);
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_IRQL_requires_max_(PASSIVE_LEVEL)
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WDFAPI
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NTSTATUS
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WDFEXPORT(WdfFileObjectDecrementProcessKeepAliveCount)(
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_In_
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PWDF_DRIVER_GLOBALS DriverGlobals,
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_In_
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WDFFILEOBJECT FileObject
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);
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}
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extern "C" {
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_Must_inspect_result_
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NTSTATUS
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FxObject::_ObjectQuery(
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_In_ FxObject* Object,
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_In_ CONST GUID* Guid,
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_In_ ULONG QueryBufferLength,
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_Out_writes_bytes_(QueryBufferLength)
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PVOID QueryBuffer
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)
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/*++
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Routine Description:
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Query the object handle for specific information
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This allows dynamic extensions to DDI's.
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Currently, it is used to allow test hooks for verification
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which are not available in a production release.
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Arguments:
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Object - Object to query
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Guid - GUID to represent the information/DDI to query for
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QueryBufferLength - Length of QueryBuffer to return data in
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QueryBuffer - Pointer to QueryBuffer
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Returns:
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NTSTATUS
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--*/
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{
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PFX_DRIVER_GLOBALS pFxDriverGlobals = Object->GetDriverGlobals();
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//
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// Design Note: This interface does not look strongly typed
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// but it is. The GUID defines a specific strongly typed
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// contract for QueryBuffer and QueryBufferLength.
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//
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#if DBG
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//
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// These operations are only available on checked builds for deep unit
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// testing, code coverage analysis, and model verification.
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//
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// Add code based on the GUID
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// IsEqualGUID(guid1, guid2), DEFINE_GUID, INITGUID, inc\wnet\guiddef.h
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#endif
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if (IsEqualGUID(*Guid, GUID_WDFP_FILEOBJECT_INTERFACE)) {
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//
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// Check the query buffer size before performing the cast
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//
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const ULONG RequiredBufferLength = sizeof(WDFP_FILEOBJECT_INTERFACE);
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if (QueryBufferLength < RequiredBufferLength) {
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DoTraceLevelMessage(
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pFxDriverGlobals, TRACE_LEVEL_ERROR, TRACINGDEVICE,
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"Insufficient query buffer size for file object query "
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"Required size %d, %!STATUS!",
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RequiredBufferLength,
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STATUS_BUFFER_TOO_SMALL);
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FxVerifierDbgBreakPoint(pFxDriverGlobals);
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return STATUS_BUFFER_TOO_SMALL;
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}
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if (nullptr == QueryBuffer) {
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DoTraceLevelMessage(
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pFxDriverGlobals, TRACE_LEVEL_ERROR, TRACINGDEVICE,
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"NULL query buffer for file object query, %!STATUS!",
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STATUS_BUFFER_TOO_SMALL);
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FxVerifierDbgBreakPoint(pFxDriverGlobals);
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return STATUS_INVALID_PARAMETER;
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}
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PWDFP_FILEOBJECT_INTERFACE FileObjectInterface =
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reinterpret_cast<PWDFP_FILEOBJECT_INTERFACE>(QueryBuffer);
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//
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// Check the struct version (require an exact match for a private DDI)
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//
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if (FileObjectInterface->Size != RequiredBufferLength) {
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DoTraceLevelMessage(
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pFxDriverGlobals, TRACE_LEVEL_ERROR, TRACINGDEVICE,
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"Wrong struct version provided for file object query, "
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"%!STATUS!",
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STATUS_INVALID_PARAMETER);
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FxVerifierDbgBreakPoint(pFxDriverGlobals);
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return STATUS_INVALID_PARAMETER;
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}
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FileObjectInterface->WdfpFileObjectIncrementProcessKeepAliveCount =
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WDFEXPORT(WdfFileObjectIncrementProcessKeepAliveCount);
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FileObjectInterface->WdfpFileObjectDecrementProcessKeepAliveCount =
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WDFEXPORT(WdfFileObjectDecrementProcessKeepAliveCount);
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return STATUS_SUCCESS;
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}
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return STATUS_NOT_FOUND;
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}
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} // extern "C"
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