Re: [dpdk-dev] [PATCH 5/5] net/softnic: update headers size calculation

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 11/16/2020 7:55 AM, Xiaoyu Min wrote:
> From: Dekel Peled <dekelp@nvidia.com>
> 
> The rte_flow_item_eth and rte_flow_item_vlan items were updated in [1].
> The rte_flow_item_ipv6 item was updated in [2].
> The structs now contain additional metadata following the header data.
> The size to use for match should be the header data size only, and
> not the size of the whole struct.
> 
> This patch replaces the rte_flow_item_* with the corresponding rte_*_hdr.
> 
> [1]:commit 09315fc83861 ("ethdev: add VLAN attributes to ethernet and VLAN
> items")
> 
> [2]: commit ad976bd40d28 ("ethdev: add extensions attributes to IPv6 item")
> 
> Signed-off-by: Dekel Peled <dekelp@nvidia.com>
> ---
>   drivers/net/softnic/rte_eth_softnic_flow.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/softnic/rte_eth_softnic_flow.c b/drivers/net/softnic/rte_eth_softnic_flow.c
> index f05ff092fa..7925bad1c0 100644
> --- a/drivers/net/softnic/rte_eth_softnic_flow.c
> +++ b/drivers/net/softnic/rte_eth_softnic_flow.c
> @@ -169,22 +169,22 @@ flow_item_is_proto(enum rte_flow_item_type type,
>   
>   	case RTE_FLOW_ITEM_TYPE_ETH:
>   		*mask = &rte_flow_item_eth_mask;
> -		*size = sizeof(struct rte_flow_item_eth);
> +		*size = sizeof(struct rte_ether_hdr);
>   		return 1; /* TRUE */
>   
>   	case RTE_FLOW_ITEM_TYPE_VLAN:
>   		*mask = &rte_flow_item_vlan_mask;
> -		*size = sizeof(struct rte_flow_item_vlan);
> +		*size = sizeof(struct rte_vlan_hdr);
>   		return 1;
>   
>   	case RTE_FLOW_ITEM_TYPE_IPV4:
>   		*mask = &rte_flow_item_ipv4_mask;
> -		*size = sizeof(struct rte_flow_item_ipv4);
> +		*size = sizeof(struct rte_ipv4_hdr);
>   		return 1;
>   
>   	case RTE_FLOW_ITEM_TYPE_IPV6:
>   		*mask = &rte_flow_item_ipv6_mask;
> -		*size = sizeof(struct rte_flow_item_ipv6);
> +		*size = sizeof(struct rte_ipv6_hdr);
>   		return 1;
>   

As far as I can see the 'flow_item_is_proto' sets the size to be used over 
'rte_flow_item_*" types, the original values seems correct to me, am I missing 
something.

Can you please elaborate why the change is needed?