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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: 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>
alistair/sunxi64-5.8
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);