net/mlx5e: TC, Reject rules with multiple CT actions

The driver doesn't support multiple CT actions.
Multiple CT clear actions are ok as they are redundant also with
another CT actions.

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/act/act.h b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/act.h
index 04734e5..bfbc91c 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/act.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/act.h
@@ -16,6 +16,7 @@ struct mlx5e_tc_act_parse_state {
        unsigned int num_actions;
        struct mlx5e_tc_flow *flow;
        struct netlink_ext_ack *extack;
+       bool ct;
        bool encap;
        bool decap;
        bool mpls_push;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/ct.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/ct.c
index 0d08cc3..4a04e0a 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/ct.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/ct.c
@@ -11,6 +11,7 @@ tc_act_can_offload_ct(struct mlx5e_tc_act_parse_state *parse_state,
                      int act_index,
                      struct mlx5_flow_attr *attr)
 {
+       bool clear_action = act->ct.action & TCA_CT_ACT_CLEAR;
        struct netlink_ext_ack *extack = parse_state->extack;
 
        if (flow_flag_test(parse_state->flow, SAMPLE)) {
@@ -19,6 +20,11 @@ tc_act_can_offload_ct(struct mlx5e_tc_act_parse_state *parse_state,
                return false;
        }
 
+       if (parse_state->ct && !clear_action) {
+               NL_SET_ERR_MSG_MOD(extack, "Multiple CT actions are not supoported");
+               return false;
+       }
+
        return true;
 }
 
@@ -28,6 +34,7 @@ tc_act_parse_ct(struct mlx5e_tc_act_parse_state *parse_state,
                struct mlx5e_priv *priv,
                struct mlx5_flow_attr *attr)
 {
+       bool clear_action = act->ct.action & TCA_CT_ACT_CLEAR;
        int err;
 
        err = mlx5_tc_ct_parse_action(parse_state->ct_priv, attr,
@@ -41,6 +48,9 @@ tc_act_parse_ct(struct mlx5e_tc_act_parse_state *parse_state,
        if (mlx5e_is_eswitch_flow(parse_state->flow))
                attr->esw_attr->split_count = attr->esw_attr->out_count;
 
+       if (!clear_action)
+               parse_state->ct = true;
+
        return 0;
 }