Re: [PATCH v2 2/6] ethdev: add GTPC and GTPU items

["Xing, Beilei" <beilei.xing@intel.com>]

Hi Adrien,

> -----Original Message-----
> From: Adrien Mazarguil [mailto:adrien.mazarguil@6wind.com]
> Sent: Thursday, September 7, 2017 8:20 PM
> To: Xing, Beilei <beilei.xing@intel.com>
> Cc: Wu, Jingjing <jingjing.wu@intel.com>; Chilikin, Andrey
> <andrey.chilikin@intel.com>; dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v2 2/6] ethdev: add GTPC and GTPU items
> 
> Hi Beilei,
> 
> I assume this patch supersedes [1]?
> 
> [1] http://dpdk.org/ml/archives/dev/2017-August/073501.html
> 
> Thanks for merging testpmd and the API change as a single patch, I still have
> a few comments, see below.
> 
> (please add "flow API" somewhere in the title by the way)

Thanks for all your comments.
Yes, http://dpdk.org/ml/archives/dev/2017-August/073501.html is superseded and did merging testpmd and API change.
I will update title in next version.

> 
> On Thu, Sep 07, 2017 at 07:20:59PM +0800, Beilei Xing wrote:
> > This patch adds GTPC and GTPU items to generic rte flow, and also
> > exposes the following item fields through the flow command:
> >
> > - GTPC TEID
> > - GTPU TEID
> >
> > Signed-off-by: Beilei Xing <beilei.xing@intel.com>
> 
> Won't there be a need to match nonspecific GTP traffic as well (both GTP-C
> and GTP-U a once), since they use the same structure?
> 
> I'm not familiar with the protocol at all so I wonder if you should maybe leave
> the GTP item in addition to those two.
> 

Agree, I will leave the GTP item in next version.

GTP-C and GTP-U use the same structure, the difference between them is UDP port, 2123 is for GTP-C, and 2152 is for GTP-U.
Add GTP-C and GTP -U item since I want to design a user-friendly CLI.

For example, if user wants to add such flow: assign GTP-U packets with TEID 0x123456 to queue 14. 
Then use can use following CLI:
flow create 0 ingress pattern eth / ipv4 / udp / gtpu teid is 0x123456 / end actions queue index 14 / end
instead of below CLI to distinguish GTP-C and GTP-U with UDP port:
flow create 0 ingress pattern eth / ipv4 / udp dst spec 2125 dst mask 0 / gtp teid is 0x123456 / end actions queue index 14 / end

And all your other comments will be addressed in next version, thanks.

Beilei