[dpdk-dev] [RFC] ethdev: introduce GENEVE header extension item

Stephen Hemminger stephen at networkplumber.org
Sun Aug 16 19:25:58 CEST 2020


On Sun, 16 Aug 2020 10:15:03 +0000
Shiri Kuzin <shirik at nvidia.com> wrote:

> The Geneve tunneling protocol is designed to allow
> the user to specify some data context on the packet.
> The header extension options is the mean intended
> to present the user data. These ones are implemented
> in TLV (Type-Length-Value) fashion, in order to
> support these Geneve protocol feature we will
> introduce the new item "rte_flow_item_geneve_option"
> 
> The support for new item will be added to testpmd
> and include values and masks for the fields:
> - class
> - type
> - data length
> - data itself
> 
> The usage example:
> 
> "flow create 0 ingress pattern ipv4 / udp /
> geneve / geneve_opt class is 102 type is 80
> type mask ff data is 10002 data mask is
> 7fffffff / end actions drop / end "
> 
> New item will be added to testpmd to support
> raw encap/decap action.
> 
> Signed-off-by: Shiri Kuzin <shirik at nvidia.com>
> ---
>  lib/librte_ethdev/rte_flow.h | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/lib/librte_ethdev/rte_flow.h b/lib/librte_ethdev/rte_flow.h
> index da8bfa5..d04ee7c 100644
> --- a/lib/librte_ethdev/rte_flow.h
> +++ b/lib/librte_ethdev/rte_flow.h
> @@ -347,6 +347,13 @@ enum rte_flow_item_type {
>  	RTE_FLOW_ITEM_TYPE_GENEVE,
>  
>  	/**
> +	 * Matches a GENEVE Variable Length Option.
> +	 *
> +	 * See struct rte_flow_item_geneve_option.
> +	 */
> +	RTE_FLOW_ITEM_TYPE_GENEVE_OPTION,
> +
> +	/**

Please don't break ABI by putting items in middle of enum.
New items should go at the end.
enum changes the val


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