Re: [PATCH 1/1] RDMA/rxe: Use the standard method to produce udp source port

[Leon Romanovsky <leon@kernel.org>]

On Fri, Dec 24, 2021 at 12:27:35PM -0500, yanjun.zhu@linux.dev wrote:
> From: Zhu Yanjun <yanjun.zhu@linux.dev>
> 
> Use the standard method to produce udp source port based on the
> commit 2b880b2e5e03 ("RDMA/mlx5: Define RoCEv2 udp source port
> when set path").
> 
> Signed-off-by: Zhu Yanjun <yanjun.zhu@linux.dev>
> ---
>  drivers/infiniband/sw/rxe/rxe_verbs.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
> index 0aa0d7e52773..9a0748ad6417 100644
> --- a/drivers/infiniband/sw/rxe/rxe_verbs.c
> +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
> @@ -451,6 +451,14 @@ static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init,
>  	return err;
>  }
>  
> +static u16 rxe_get_udp_sport(u32 fl, u32 lqpn, u32 rqpn)
> +{
> +	if (!fl)
> +		fl = rdma_calc_flow_label(lqpn, rqpn);
> +
> +	return rdma_flow_label_to_udp_sport(fl);
> +}
> +

Now, we have three drivers with the same function.

>  static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
>  			 int mask, struct ib_udata *udata)
>  {
> @@ -469,6 +477,16 @@ static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
>  	if (err)
>  		goto err1;
>  
> +	if (mask & IB_QP_AV) {
> +		if (attr->ah_attr.ah_flags & IB_AH_GRH) {
> +			u32 fl = attr->ah_attr.grh.flow_label;
> +			u32 lqp = qp->ibqp.qp_num;
> +			u32 rqp = qp->attr.dest_qp_num;
> +
> +			qp->src_port = rxe_get_udp_sport(fl, lqp, rqp);
> +		}
> +	}
> +
>  	return 0;
>  
>  err1:
> -- 
> 2.27.0
>