net/mlx5e: TC, validate action list per attribute

Currently the entire flow action list is validate for offload limitations.
For example, flow with both forward and drop actions are declared invalid
due to hardware restrictions.
However, a multi-table hardware model changes the limitations from a flow
scope to a single flow attribute scope.

Apply offload limitations to flow attributes instead of the entire flow.

Signed-off-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Link: https://lore.kernel.org/r/20221203221337.29267-6-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 4622254..7eaf6c7 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1725,6 +1725,30 @@ clean_encap_dests(struct mlx5e_priv *priv,
 }
 
 static int
+verify_attr_actions(u32 actions, struct netlink_ext_ack *extack)
+{
+       if (!(actions &
+             (MLX5_FLOW_CONTEXT_ACTION_FWD_DEST | MLX5_FLOW_CONTEXT_ACTION_DROP))) {
+               NL_SET_ERR_MSG_MOD(extack, "Rule must have at least one forward/drop action");
+               return -EOPNOTSUPP;
+       }
+
+       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 -EOPNOTSUPP;
+       }
+
+       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");
+               return -EOPNOTSUPP;
+       }
+
+       return 0;
+}
+
+static int
 post_process_attr(struct mlx5e_tc_flow *flow,
                  struct mlx5_flow_attr *attr,
                  bool is_post_act_attr,
@@ -1734,6 +1758,10 @@ post_process_attr(struct mlx5e_tc_flow *flow,
        bool vf_tun;
        int err = 0;
 
+       err = verify_attr_actions(attr->action, extack);
+       if (err)
+               goto err_out;
+
        err = set_encap_dests(flow->priv, flow, attr, extack, &vf_tun);
        if (err)
                goto err_out;
@@ -3532,36 +3560,6 @@ actions_match_supported(struct mlx5e_priv *priv,
        ct_clear = flow->attr->ct_attr.ct_action & TCA_CT_ACT_CLEAR;
        ct_flow = flow_flag_test(flow, CT) && !ct_clear;
 
-       if (!(actions &
-             (MLX5_FLOW_CONTEXT_ACTION_FWD_DEST | MLX5_FLOW_CONTEXT_ACTION_DROP))) {
-               NL_SET_ERR_MSG_MOD(extack, "Rule must have at least one forward/drop action");
-               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");
-               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");
-               return false;
-       }
-
        if (actions & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR &&
            !modify_header_match_supported(priv, &parse_attr->spec, flow_action,
                                           actions, ct_flow, ct_clear, extack))
@@ -3957,6 +3955,10 @@ parse_tc_nic_actions(struct mlx5e_priv *priv,
        if (err)
                return err;
 
+       err = verify_attr_actions(attr->action, extack);
+       if (err)
+               return err;
+
        if (!actions_match_supported(priv, flow_action, parse_state->actions,
                                     parse_attr, flow, extack))
                return -EOPNOTSUPP;