Re: [dpdk-dev] [PATCH v3] net/mlx5: support modify field rte flow action

[Raslan Darawsheh <rasland@nvidia.com>]

Hi,

> -----Original Message-----
> From: Alexander Kozyrev <akozyrev@nvidia.com>
> Sent: Thursday, January 28, 2021 10:00 AM
> To: dev@dpdk.org
> Cc: Raslan Darawsheh <rasland@nvidia.com>; Slava Ovsiienko
> <viacheslavo@nvidia.com>; Matan Azrad <matan@nvidia.com>; Ori Kam
> <orika@nvidia.com>
> Subject: [PATCH v3] net/mlx5: support modify field rte flow action
> 
> Add support for new MODIFY_FIELD action to the Mellanox PMD.
> This is the generic API that allows to manipulate any packet
> header field by copying data from another packet field or
> mark, metadata, tag, or immediate value (or pointer to it).
> 
> Since the API is generic and covers a lot of action under its
> umbrella it makes sense to implement all the mechanics gradually
> in order to move to this API for any packet field manipulations
> in the future. This is the first step of RTE flows consolidation.
> 
> The modify field RTE flow action supports three operations: set,
> add and sub. This patch brings to live only the "set" operation.
> Support is provided for any packet header field as well as
> meta/tag/mark and immediate value can be used as a source.
> 
> There are few limitations for this first version of API support:
> - encapsulation levels are not supported, just outermost header
> can be manipulated for now.
> - offsets can only be 4-bytes aligned: 32, 64 and 96 for IPv6.
> - the special ITEM_START ID is not supported as we do not allow
> to cross packet header field boundaries yet.
> 
> Signed-off-by: Alexander Kozyrev <akozyrev@nvidia.com>
> Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
> ---
> Depends-on: patch-87216
> v1: https://patchwork.dpdk.org/patch/87390/
> v2: Added documentation, addressed comments.
> v3: Corrected header field sizes.

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh