IopCallDriverReference

VOID __fastcall IopCallDriverReference(
        _DEVICE_OBJECT *DeviceObject,
        _IRP *Irp,
        UINT8 SynchronousIo,
        _FILE_OBJECT *FileObject,
        _TRANSFER_TYPE TransferType){
  _DWORD *FileObjectExtension; 
  int v10; 
  _IO_PRIORITY_HINT BaseIoPriorityThread; 
  __int64 v12; 
  unsigned int v13; 
  int v14; 
  unsigned int v15; 
  int v16; 
  int v17; 
  char *IrpExtension; 
  _ETHREAD *v19; 
  unsigned int Flags; 
  _ETHREAD *Thread; 
  _ETHREAD *CurrentThread; 
  _LIST_ENTRY *ActivityId; 
  __int128 v24; 

  if( !SynchronousIo )
  {
    if( ObpTraceFlags )
      ObpPushStackInfo((_OBJECT_HEADER *)&FileObject[-1].gap80[40], 1u, 1ui64, 0x746C6644ui64);
    ObpIncrPointerCount((_OBJECT_HEADER *)&FileObject[-1].gap80[40]);
  }
  FileObjectExtension = FileObject->FileObjectExtension;
  v10 = 2;
  if( FileObjectExtension && FileObjectExtension[20] )
  {
    v13 = Irp->Flags & 0xFFF1FFFF;
    Irp->Flags = v13;
    v14 = FileObjectExtension[20] << 17;
  }
  else
  {
    BaseIoPriorityThread = PsGetBaseIoPriorityThread((_ETHREAD *)KeGetCurrentThread());
    if( BaseIoPriorityThread < v10 && (struct _KTHREAD *)v12 == KeGetCurrentThread() && *(_DWORD *)(v12 + 1360) )
      BaseIoPriorityThread = v10;
    v13 = Irp->Flags & 0xFFF1FFFF;
    v14 = (BaseIoPriorityThread << 17) + 0x20000;
  }
  v15 = v13 | v14;
  Irp->Flags = v15;
  v16 = (v15 >> 17) & 7;
  if( !v16 )
  {
    v17 = v10;
LABEL_7:
    v10 = v17;
    goto LABEL_8;
  }
  v17 = v16 - 1;
  if( v17 >= v10 )
    goto LABEL_7;
  Thread = Irp->Tail.Thread;
  if( !Thread || !Thread->IoBoostCount )
    goto LABEL_7;
LABEL_8:
  if( !Irp->RequestorMode )
  {
    if( v10 >= 2 )
      goto LABEL_10;
    v19 = Irp->Tail.Thread;
    if( !v19 || (v19->Tcb._bf_0 & 0x400) == 0 && (v19->SameThreadPassiveFlags & 0x80u) == 0 )
    {
      Flags = Irp->Flags;
      ++*(&stru_140C452E0 + 285);
      Irp->Flags = Flags & 0xFFF1FFFF | 0x60000;
      goto LABEL_10;
    }
  }
  if( v10 < 2 )
  {
    if( TransferType )
    {
      if( TransferType == WriteTransfer )
        ++*(&stru_140C452E0 + 284);
    }
    else
    {
      ++*(&stru_140C452E0 + 283);
    }
  }
LABEL_10:
  if( (Irp->AllocationFlags & 0x80u) == 0
    && (IrpExtension = (char *)Irp->Tail.IrpExtension) != 0i64
    && (*IrpExtension & 2) != 0 )
  {
    v24 = *(_OWORD *)(IrpExtension + 24);
    CurrentThread = (_ETHREAD *)KeGetCurrentThread();
    ActivityId = (_LIST_ENTRY *)CurrentThread->ActivityId;
    CurrentThread->ActivityId = (const _GUID *)&v24;
    IofCallDriver((UINT64)DeviceObject, (UINT64)Irp);
    KeGetCurrentThread()[1].WaitBlock[1].WaitListEntry.Flink = ActivityId;
  }
  else
  {
    IofCallDriver((UINT64)DeviceObject, (UINT64)Irp);
  }
  if( !SynchronousIo )
    ObDereferenceObjectDeferDeleteWithTag((UINT64)FileObject, 1953261124i64);
}

Referenced by: