net/mlx5: reject inner ethernet matching in GTP

The user is able to create a flow rule pattern with ETH after GTP
although it is not supported by the flex-parser configuration.

Failed the rule validation in such case with proper error message.

Fixes: 23c1d42c7138 ("net/mlx5: split flow validation to dedicated function")
Cc: stable@dpdk.org
Signed-off-by: Lior Margalit <lmargalit@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 2059f29b23530068fa342fb5f4bd5391ec9e3ba4..a3fdce685e1295b28b7e2b12b30c19581d7f1118 100644 (file)
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -1999,6 +1999,10 @@ mlx5_flow_validate_item_eth(const struct rte_flow_item *item,
                return rte_flow_error_set(error, EINVAL,
                                          RTE_FLOW_ERROR_TYPE_ITEM, item,
                                          "L2 layer should not follow VLAN");
+       if (item_flags & MLX5_FLOW_LAYER_GTP)
+               return rte_flow_error_set(error, EINVAL,
+                                         RTE_FLOW_ERROR_TYPE_ITEM, item,
+                                         "L2 layer should not follow GTP");
        if (!mask)
                mask = &rte_flow_item_eth_mask;
        ret = mlx5_flow_item_acceptable(item, (const uint8_t *)mask,