static int coroutine_fn bdrv_co_do_readv(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) { BlockDriver *drv = bs->drv; if (!drv) { return -ENOMEDIUM; } if (bdrv_check_request(bs, sector_num, nb_sectors)) { return -EIO; } /* throttling disk read I/O */ if (bs->io_limits_enabled) { bdrv_io_limits_intercept(bs, false, nb_sectors); } return drv->bdrv_co_readv(bs, sector_num, nb_sectors, qiov); }