Function flow_get_prefix_layer_flags

dpdk/drivers/net/mlx5/mlx5_flow.c:4754–4777

* Get layer flags from the prefix flow. * * Some flows may be split to several subflows, the prefix subflow gets the * match items and the suffix sub flow gets the actions. * Some actions need the user defined match item flags to get the detail for * the action. * This function helps the suffix flow to get the item layer flags from prefix * subflow. * * @param[in] dev_flow * Poi

 *   The layers get from prefix subflow.
 */
static inline uint64_t
flow_get_prefix_layer_flags(struct mlx5_flow *dev_flow)
{
	uint64_t layers = 0;

	/*
	 * Layers bits could be localization, but usually the compiler will
	 * help to do the optimization work for source code.
	 * If no decap actions, use the layers directly.
	 */
	if (!(dev_flow->act_flags & MLX5_FLOW_ACTION_DECAP))
		return dev_flow->handle->layers;
	/* Convert L3 layers with decap action. */
	if (dev_flow->handle->layers & MLX5_FLOW_LAYER_INNER_L3_IPV4)
		layers |= MLX5_FLOW_LAYER_OUTER_L3_IPV4;
	else if (dev_flow->handle->layers & MLX5_FLOW_LAYER_INNER_L3_IPV6)
		layers |= MLX5_FLOW_LAYER_OUTER_L3_IPV6;
	/* Convert L4 layers with decap action.  */
	if (dev_flow->handle->layers & MLX5_FLOW_LAYER_INNER_L4_TCP)
		layers |= MLX5_FLOW_LAYER_OUTER_L4_TCP;
	else if (dev_flow->handle->layers & MLX5_FLOW_LAYER_INNER_L4_UDP)
		layers |= MLX5_FLOW_LAYER_OUTER_L4_UDP;
	return layers;
}

/**
 * Get metadata split action information.