[PATCH 5.13 082/151] net/mlx5e: Avoid creating tunnel headers for local route

Greg Kroah-Hartman
2021-08-16T13:25:57Z

From: Roi Dayan <roid@nvidia.com>

[ Upstream commit c623c95afa56bf4bf64e4f58742dc94616ef83db ]

It could be local and remote are on the same machine and the route
result will be a local route which will result in creating encap id
with src/dst mac address of 0.

Fixes: a54e20b4fcae ("net/mlx5e: Add basic TC tunnel set action for SRIOV offloads")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 5 +++++
1 file changed, 5 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 172e0474f2e6..3980a3905084 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
@@ -124,6 +124,11 @@ static int mlx5e_route_lookup_ipv4_get(struct mlx5e_priv *priv,
if (IS_ERR(rt))
return PTR_ERR(rt);

+ if (rt->rt_type != RTN_UNICAST) {
+ ret = -ENETUNREACH;
+ goto err_rt_release;
+ }
+
if (mlx5_lag_is_multipath(mdev) && rt->rt_gw_family != AF_INET) {
ret = -ENETUNREACH;
goto err_rt_release;
--
2.30.2