FsRtlGetVirtualDiskNestingLevel

VOID __fastcall FsRtlGetVirtualDiskNestingLevel(
        _DEVICE_OBJECT *DeviceObject,
        UINT64 *NestingLevel,
        UINT64 *NestingFlags){
  unsigned __int64 DeviceType; 
  int v7; 
  int v8; 
  __int64 v9; 
  char v10; 
  char v11; 
  _IRP *v12; 
  INT64 v13; 
  _BYTE *v14; 
  NTSTATUS Status; 
  _BYTE *v16; 
  unsigned int v17; 
  int v18; 
  int v19; 
  UINT64 OutputBufferLength; 
  __int16 Object; 
  char v22; 
  char v23; 
  int v24; 
  __int64 v25[2]; 
  __int64 InputBuffer; 
  _IO_STATUS_BLOCK IoStatusBlock; 
  __int128 OutputBuffer; 
  INT64 v29; 
  VOID *ReturnAddress; 

  DeviceType = DeviceObject->DeviceType;
  v23 = 0;
  v7 = 0;
  v8 = 1;
  IoStatusBlock = 0i64;
  if( (unsigned int)DeviceType <= 0x24 )
  {
    v9 = 0x100000018Ci64;
    if( _bittest64(&v9, DeviceType) )
    {
      Object = 0;
      v25[1] = (__int64)v25;
      v22 = 6;
      v25[0] = (__int64)v25;
      v24 = 0;
      IoSetThreadHardErrorMode(0);
      v11 = v10;
      InputBuffer = 1i64;
      LODWORD(v29) = 0;
      LODWORD(OutputBufferLength) = 20;
      OutputBuffer = 0i64;
      v12 = IopBuildDeviceIoControlRequest(
              0x2D1190ui64,
              DeviceObject,
              &InputBuffer,
              8ui64,
              &OutputBuffer,
              OutputBufferLength,
              0,
              (_KEVENT *)&Object,
              &IoStatusBlock,
              ReturnAddress);
      if( v12 )
      {
        Status = IofCallDriver((UINT64)DeviceObject, (UINT64)v12);
        if( Status == 259 )
        {
          KeWaitForSingleObject((UINT64)&Object, 0, 0, 0, 0i64);
          Status = IoStatusBlock.Status;
        }
        if( Status >= 0 && IoStatusBlock.Information >= 0x14 && (_DWORD)OutputBuffer == 1 )
        {
          FsRtlQueryMaximumVirtualDiskNestingLevel(v13, v14);
          if( (unsigned int)v29 > v17 )
          {
            FsRtlQueryMaximumVirtualDiskNestingLevel((unsigned int)v29, v16);
            v7 = v19;
          }
          else if( (_DWORD)v29 )
          {
            v7 = v29;
          }
          BYTE1(v13) = BYTE13(OutputBuffer);
          if( BYTE4(OutputBuffer) )
            v8 = 0;
          v18 = v8;
          v8 |= 2u;
          if( (BYTE12(OutputBuffer) & 2) == 0 )
            v8 = v18;
        }
      }
      *(_DWORD *)NestingLevel = v7;
      if( NestingFlags )
        *(_DWORD *)NestingFlags = v8;
      LOBYTE(v13) = v11;
      IoSetThreadHardErrorMode(v13);
    }
  }
}

Referenced by: