rdma_consumer_reject_data
EXPORT_SYMBOL(rdma_consumer_reject_data);
msg = rdma_consumer_reject_data(con->c.cm_id, ev, &data_len);
rej_data = rdma_consumer_reject_data(cm_id, ev, &rej_data_len);
const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
err = (int *)rdma_consumer_reject_data(cm_id, event, &len);