Commit 8b46d424 authored by Erez Shitrit's avatar Erez Shitrit Committed by Saeed Mahameed
Browse files

net/mlx5e: IPoIB, Drop multicast packets that this interface sent 



After enabled loopback packets for IPoIB, we need to drop these packets
that this HCA has replicated and came back to the same interface that
sent them.

Fixes: 4c6c615e ("net/mlx5e: IPoIB, Add PKEY child interface nic profile")
Signed-off-by: default avatarErez Shitrit <erezsh@mellanox.com>
Reviewed-by: default avatarAlex Vesker <valex@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 80639b19

drivers/net/ethernet/mellanox/mlx5/core/en_rx.c

+12 −3
Original line number Diff line number Diff line
@@ -1489,6 +1489,7 @@ out: 


#ifdef CONFIG_MLX5_CORE_IPOIB



#define MLX5_IB_GRH_SGID_OFFSET 8

#define MLX5_IB_GRH_DGID_OFFSET 24

#define MLX5_GID_SIZE           16
@@ -1502,6 +1503,7 @@ static inline void mlx5i_complete_rx_cqe(struct mlx5e_rq *rq, 
	struct net_device *netdev;

	struct mlx5e_priv *priv;

	char *pseudo_header;

	u32 flags_rqpn;

	u32 qpn;

	u8 *dgid;

	u8 g;
@@ -1523,7 +1525,8 @@ static inline void mlx5i_complete_rx_cqe(struct mlx5e_rq *rq, 
	tstamp = &priv->tstamp;

	stats = &priv->channel_stats[rq->ix].rq;



	g = (be32_to_cpu(cqe->flags_rqpn) >> 28) & 3;

	flags_rqpn = be32_to_cpu(cqe->flags_rqpn);

	g = (flags_rqpn >> 28) & 3;

	dgid = skb->data + MLX5_IB_GRH_DGID_OFFSET;

	if ((!g) || dgid[0] != 0xff)

		skb->pkt_type = PACKET_HOST;
@@ -1532,9 +1535,15 @@ static inline void mlx5i_complete_rx_cqe(struct mlx5e_rq *rq, 
	else

		skb->pkt_type = PACKET_MULTICAST;



	/* TODO: IB/ipoib: Allow mcast packets from other VFs

	 * 68996a6e760e5c74654723eeb57bf65628ae87f4

	/* Drop packets that this interface sent, ie multicast packets

	 * that the HCA has replicated.

	 */

	if (g && (qpn == (flags_rqpn & 0xffffff)) &&

	    (memcmp(netdev->dev_addr + 4, skb->data + MLX5_IB_GRH_SGID_OFFSET,

		    MLX5_GID_SIZE) == 0)) {

		skb->dev = NULL;

		return;

	}



	skb_pull(skb, MLX5_IB_GRH_BYTES);

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