func: static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
  
                           int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
  
                           BlockDriverCompletionFunc *cb, void *opaque)
  
  {
  
      BDRVRawState *s = bs->opaque;
  
      return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
  
                         cb, opaque, QEMU_AIO_READ);
  
  }
  