int nbd_client_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags) { NBDRequest request = { .type = NBD_CMD_READ, .from = offset, .len = bytes, }; assert(bytes <= NBD_MAX_BUFFER_SIZE); assert(!flags); return nbd_co_request(bs, &request, qiov); }