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https://github.com/reactos/reactos.git
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1f377076d7
Not all files are included, but these are necessary to compile cdrom driver. So far it can only be statically linked with drivers, a proper implementation requires wdfldr helper driver
176 lines
3.6 KiB
C++
176 lines
3.6 KiB
C++
/*++
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Copyright (c) Microsoft Corporation
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Module Name:
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FxIoTargetSelf.cpp
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Abstract:
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This module implements the IO Target APIs
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Author:
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Environment:
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Both kernel and user mode
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Revision History:
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--*/
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#include "../fxtargetsshared.hpp"
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extern "C" {
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#if defined(EVENT_TRACING)
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#include "FxIoTargetSelf.tmh"
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#endif
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}
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FxIoTargetSelf::FxIoTargetSelf(
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_In_ PFX_DRIVER_GLOBALS FxDriverGlobals,
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_In_ USHORT ObjectSize
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) :
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FxIoTarget(FxDriverGlobals, ObjectSize, FX_TYPE_IO_TARGET_SELF),
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m_DispatchQueue(NULL)
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{
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}
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FxIoTargetSelf::~FxIoTargetSelf()
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{
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}
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FxIoQueue*
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FxIoTargetSelf::GetDispatchQueue(
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UCHAR MajorFunction
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)
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/*++
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Routine Description:
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Returns a pointer to the queue to which an IO sent to the Self
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io target must be sent to
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Arguments:
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MajorFunction - IRP_MJ_READ, IRP_MJ_WRITE, or IRP_MJ_DEVICE_CONTROL
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Returns:
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FxIoQueue*
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--*/
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{
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if (m_DispatchQueue != NULL) {
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return m_DispatchQueue;
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}
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return m_Device->m_PkgIo->GetDispatchQueue(MajorFunction);
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}
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VOID
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FxIoTargetSelf::Send(
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_In_ MdIrp Irp
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)
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/*++
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Routine Description:
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send an MdIrp to the Self IO Target.
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Arguments:
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MdIrp for IRP_MJ_READ, IRP_MJ_WRITE, or IRP_MJ_DEVICE_CONTROL
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Returns:
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VOID
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Implementation Note:
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Function body inspired by WdfDeviceWdmDispatchIrpToIoQueue API.
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--*/
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{
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FxIrp irp(Irp);
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FxIoQueue* queue;
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NTSTATUS status;
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UCHAR majorFunction;
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FxIoInCallerContext* ioInCallerCtx;
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#if (FX_CORE_MODE == FX_CORE_USER_MODE)
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//
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// Prepare the request to forward to the inteternal target.
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//
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(static_cast<IWudfIoIrp2*>(Irp))->PrepareToForwardToSelf();
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#else
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//
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// Set Next Stack Location
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//
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irp.SetNextIrpStackLocation();
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//
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// Set Device Object.
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//
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irp.SetCurrentDeviceObject(m_Device->GetDeviceObject());
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#endif
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majorFunction = irp.GetMajorFunction();
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//
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// Retrieve Queue
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//
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queue = GetDispatchQueue(majorFunction);
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if (queue == NULL) {
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DoTraceLevelMessage(
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GetDriverGlobals(), TRACE_LEVEL_ERROR, TRACINGIOTARGET,
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"Send WDFIOTARGET %p, No Dispatch Queue Found for Major Function %d",
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GetObjectHandle(), majorFunction);
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status = STATUS_INVALID_DEVICE_STATE;
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goto Fail;
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}
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//
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// Only read/writes/ctrls/internal_ctrls IRPs are allowed to be sent to
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// Self IO Target
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//
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if (m_Device->GetDispatchPackage(majorFunction) != m_Device->m_PkgIo) {
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status = STATUS_INVALID_PARAMETER;
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DoTraceLevelMessage(
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GetDriverGlobals(), TRACE_LEVEL_ERROR, TRACINGIOTARGET,
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"Only Read/Write/Control/Internal-Control IRPs can be "
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"forwarded to Self IO Target 0x%p, %!IRPMJ!, "
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"IRP_MN %x, Device 0x%p, %!STATUS!",
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GetHandle(), majorFunction, irp.GetMinorFunction(),
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m_Device->GetObjectHandle(), status);
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FxVerifierDbgBreakPoint(GetDriverGlobals());
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goto Fail;
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}
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//
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// Retrieve the InContextCallback function
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//
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ioInCallerCtx = m_Device->m_PkgIo->GetIoInCallerContextCallback(
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queue->GetCxDeviceInfo());
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//
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// DispatchStep2 will convert the IRP into a WDFREQUEST, queue it and if
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// possible dispatch the request to the driver.
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// If a failure occurs, DispatchStep2 completes teh Irp
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//
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(VOID) m_Device->m_PkgIo->DispatchStep2(Irp, ioInCallerCtx, queue);
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return;
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Fail:
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irp.SetStatus(status);
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irp.SetInformation(0);
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irp.CompleteRequest(IO_NO_INCREMENT);
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return;
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}
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