net/mlx5e: TC, Reject rules with forward and drop actions

Such rules are redundant but allowed and passed to the driver.
The driver does not support offloading such rules so return an error.

Fixes: acfaf192c274 ("net/mlx5e: Add TC drop and mirred/redirect action parsing for SRIOV offloads")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 671f76c350db6611e4f4c59a00479977e99a6dfb..4c6e3c26c1abb76ea9521985804a47131e0667aa 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -3191,6 +3191,12 @@ actions_match_supported(struct mlx5e_priv *priv,
                return false;
        }
 
+       if (!(~actions &
+             (MLX5_FLOW_CONTEXT_ACTION_FWD_DEST | MLX5_FLOW_CONTEXT_ACTION_DROP))) {
+               NL_SET_ERR_MSG_MOD(extack, "Rule cannot support forward+drop action");
+               return false;
+       }
+
        if (actions & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR &&
            actions & MLX5_FLOW_CONTEXT_ACTION_DROP) {
                NL_SET_ERR_MSG_MOD(extack, "Drop with modify header action is not supported");