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net/mlx5e: Don't match double-vlan packets if cvlan is not set

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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: 699e96ddf4 ("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>
This commit is contained in:
Vlad Buslov 2022-03-28 15:54:52 +03:00 committed by Saeed Mahameed
parent 7ba2d9d8de
commit ada09af92e
1 changed files with 11 additions and 0 deletions
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11
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
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@ -2459,6 +2459,17 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
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