From: Vlad Buslov vladbu@nvidia.com
commit ada09af92e621ab500dd80a16d1d0299a18a1180 upstream.
Currently, match VLAN rule also matches packets that have multiple VLAN headers. This behavior is similar to buggy flower classifier behavior that has recently been fixed. Fix the issue by matching on outer_second_cvlan_tag with value 0 which will cause the HW to verify the packet doesn't contain second vlan header.
Fixes: 699e96ddf47f ("net/mlx5e: Support offloading tc double vlan headers match") Signed-off-by: Vlad Buslov vladbu@nvidia.com Reviewed-by: Maor Dickman maord@nvidia.com Signed-off-by: Saeed Mahameed saeedm@nvidia.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c @@ -2396,6 +2396,17 @@ static int __parse_cls_flower(struct mlx match.key->vlan_priority);
*match_level = MLX5_MATCH_L2; + + if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CVLAN) && + match.mask->vlan_eth_type && + MLX5_CAP_FLOWTABLE_TYPE(priv->mdev, + ft_field_support.outer_second_vid, + fs_type)) { + MLX5_SET(fte_match_set_misc, misc_c, + outer_second_cvlan_tag, 1); + spec->match_criteria_enable |= + MLX5_MATCH_MISC_PARAMETERS; + } } } else if (*match_level != MLX5_MATCH_NONE) { /* cvlan_tag enabled in match criteria and