Re: [PATCH v2 1/2] ethdev: add new symmetric hash function

["lihuisong (C)" <lihuisong@huawei.com>]

Hi Xueming,

在 2023/8/27 16:17, Xueming Li 写道:
> The new symmetric hash function swap src/dst L3 address and
> L4 ports automatically by sorting.
>
> Signed-off-by: Xueming Li <xuemingl@nvidia.com>
> ---
>   lib/ethdev/rte_flow.h | 7 +++++++
>   1 file changed, 7 insertions(+)
>
> diff --git a/lib/ethdev/rte_flow.h b/lib/ethdev/rte_flow.h
> index 2ebb76dbc0..4f4421ca50 100644
> --- a/lib/ethdev/rte_flow.h
> +++ b/lib/ethdev/rte_flow.h
> @@ -3196,6 +3196,13 @@ enum rte_eth_hash_function {
>   	 * src or dst address will xor with zero pair.
>   	 */
>   	RTE_ETH_HASH_FUNCTION_SYMMETRIC_TOEPLITZ,
> +	/**
> +	 * Symmetric Toeplitz: L3 and L4 fields are sorted prior to
> +	 * the hash function.
> +	 *  If src_ip > dst_ip, swap src_ip and dst_ip.
> +	 *  If src_port > dst_port, swap src_port and dst_port.
> +	 */
If hash result are computed by the order: "src_ip+dst_ip+src_port+dst_port"
How to obtain the value of every L3 and L4 field obove?
I still cannot understand how to swap and set these values for these 
fields?
> +	RTE_ETH_HASH_FUNCTION_SYMMETRIC_TOEPLITZ_SORT,
>   	RTE_ETH_HASH_FUNCTION_MAX,
>   };
>