From: Roi Dayan <r...@mellanox.com>
As part of creating the tunnel headers while offloading TC encap rules,
we resolve the route and neighbour in order to get the source /
destination mac.
Since the way we offload multipath route is by having two HW rules,
one per uplink port, doing naive route lookup might get us a "wrong"
routing path which goes through the peer uplink and this will get us
eventually to create a wrong L2 header for the tunnel.
To avoid that, we use a device hint to get the correct route.
Signed-off-by: Roi Dayan <r...@mellanox.com>
Reviewed-by: Or Gerlitz <ogerl...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
index 03e5d0d8fd8f..fa2a3c444cdc 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
@@ -54,12 +54,24 @@ static int mlx5e_route_lookup_ipv4(struct mlx5e_priv *priv,
struct neighbour *n = NULL;
#if IS_ENABLED(CONFIG_INET)
+ struct mlx5_core_dev *mdev = priv->mdev;
+ struct net_device *uplink_dev;
int ret;
+ if (mlx5_lag_is_multipath(mdev)) {
+ struct mlx5_eswitch *esw = mdev->priv.eswitch;
+
+ uplink_dev = mlx5_eswitch_uplink_get_proto_dev(esw, REP_ETH);
+ fl4->flowi4_oif = uplink_dev->ifindex;
+ }
+
rt = ip_route_output_key(dev_net(mirred_dev), fl4);
ret = PTR_ERR_OR_ZERO(rt);
if (ret)
return ret;
+
+ if (mlx5_lag_is_multipath(mdev) && !rt->rt_gateway)
+ return -ENETUNREACH;
#else
return -EOPNOTSUPP;
#endif
--
2.20.1
