From: Erez Shitrit erezsh@mellanox.com
[ Upstream commit 8b46d424a743ddfef8056d5167f13ee7ebd1dcad ]
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: 4c6c615e3f30 ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index e2beb89c1832..b69957be653a 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -1501,6 +1501,7 @@ 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
@@ -1514,6 +1515,7 @@ 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; @@ -1535,7 +1537,8 @@ 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; @@ -1544,9 +1547,15 @@ 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);