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

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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: 4c6c615e3f ("net/mlx5e: IPoIB, Add PKEY child interface nic profile")
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Erez Shitrit 2020-05-04 11:46:25 +03:00 committed by Saeed Mahameed
parent 80639b199c
commit 8b46d424a7
1 changed files with 12 additions and 3 deletions
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15
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
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@ -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);