Re: [dpdk-dev] [PATCH v6 3/3] app/testpmd: add MPLSoGRE encapsulation

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

On 10/22/2018 6:38 PM, Ori Kam wrote:
> Example for MPLSoGRE tunnel:
> ETH / IPV4 / GRE / MPLS / IP / L4..L7
> 
> In order to encapsulate such a tunnel there is a need to remove L2 of
> the inner packet and encap the remaining tunnel, this is done by
> applying 2 rte flow commands l2_decap followed by mplsogre_encap.
> Both commands must appear in the same flow, and from the point of the
> packet it both actions are applyed at the same time. (There is no part
> where a packet doesn't have L2 header).
> 
> Decapsulating such a tunnel works the other way, first we need to decap
> the outer tunnel header and then apply the new L2.
> So the commands will be mplsogre_decap / l2_encap
> 
> Due to the complex encapsulation of MPLSoGRE flow action and
> based on the fact testpmd does not allocate memory, this patch adds a
> new command in testpmd to initialise a global structure containing the
> necessary information to make the outer layer of the packet.  This same
> global structures will then be used by the flow commands in testpmd when
> the action mplsogre_encap, mplsogre_decap, will be parsed, at this point,
> the conversion into such action becomes trivial.
> 
> Signed-off-by: Ori Kam <orika@mellanox.com>

Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>