static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
			      struct rdma_conn_param *conn_param)
{
	struct ib_cm_sidr_req_param req;
	struct ib_cm_id	*id;
	void *private_data;
	u8 offset;
	int ret;

	memset(&req, 0, sizeof req);
	offset = cma_user_data_offset(id_priv);
	req.private_data_len = offset + conn_param->private_data_len;
	if (req.private_data_len < conn_param->private_data_len)
		return -EINVAL;

	if (req.private_data_len) {
		private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
		if (!private_data)
			return -ENOMEM;
	} else {
		private_data = NULL;
	}

	if (conn_param->private_data && conn_param->private_data_len)
		memcpy(private_data + offset, conn_param->private_data,
		       conn_param->private_data_len);

	if (private_data) {
		ret = cma_format_hdr(private_data, id_priv);
		if (ret)
			goto out;
		req.private_data = private_data;
	}

	id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
			     id_priv);
	if (IS_ERR(id)) {
		ret = PTR_ERR(id);
		goto out;
	}
	id_priv->cm_id.ib = id;

	req.path = id_priv->id.route.path_rec;
	req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
	req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
	req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
	req.max_cm_retries = CMA_MAX_CM_RETRIES;

	trace_cm_send_sidr_req(id_priv);
	ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
	if (ret) {
		ib_destroy_cm_id(id_priv->cm_id.ib);
		id_priv->cm_id.ib = NULL;
	}
out:
	kfree(private_data);
	return ret;
}
Unknown