From: Eli Cohen <eli@mellanox.com>
Date: Thu, 12 Mar 2020 15:20:32 +0000 (+0200)
Subject: net/mlx5: Avoid forwarding to other eswitch uplink
X-Git-Tag: v5.7-rc1~146^2~130^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=87b51810f4ad99a833883f6f00795ee550f3a622;p=thirdparty%2Flinux.git

net/mlx5: Avoid forwarding to other eswitch uplink

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>
---

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 608d0e07c3082..b45c3f46570bd 100644
--- 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_priv *priv,
 	      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;
 }