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authorRoi Dayan <roid@mellanox.com>2019-02-05 09:48:38 +0200
committerSaeed Mahameed <saeedm@mellanox.com>2019-03-01 12:04:17 -0800
commit5fb091e8130bdd3649ca80957e59c87defbb13f9 (patch)
tree6a8548ad3407842e43f6f0d2d914e9e420fc98d5 /drivers/net/ethernet
parent316d5f72b4c1d4122f83cccbc9002e7b13660077 (diff)
downloadlinux-5fb091e8130bdd3649ca80957e59c87defbb13f9.tar.bz2
net/mlx5e: Use hint to resolve route when in HW multipath mode
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 <roid@mellanox.com> Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c12
1 files changed, 12 insertions, 0 deletions
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