From: Eli Cohen <eli@mellanox.com>
Date: Thu, 12 Mar 2020 17:20:32 +0200
Subject: net/mlx5: Avoid forwarding to other eswitch uplink
Patch-mainline: v5.7-rc1
Git-commit: 87b51810f4ad99a833883f6f00795ee550f3a622
References: jsc#SLE-15172
Do not allow forwarding of encapsulated traffic received from one eswtich's
uplink to another eswtich's uplink.
Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
@@ -66,6 +66,9 @@ static int get_route_and_out_devs(struct
mlx5e_is_uplink_rep(netdev_priv(*out_dev))))
return -EOPNOTSUPP;
+ if (mlx5e_eswitch_uplink_rep(priv->netdev) && *out_dev != priv->netdev)
+ return -EOPNOTSUPP;
+
return 0;
}