netdev - Re: [RFC net-next 0/2] net/sched: cls_flower, act

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Date:	Mon, 15 Aug 2016 15:59:06 +0300
From:	Amir Vadai <amir@...ai.me>
To:	Jiri Pirko <jiri@...nulli.us>
Cc:	Jamal Hadi Salim <jhs@...atatu.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	John Fastabend <john.fastabend@...il.com>,
	Jiri Pirko <jiri@...lanox.com>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Hadar Har-Zion <hadarh@...lanox.com>,
	Oded Shanoon <odeds@...lanox.com>,
	Amir Vadai <amirva@...lanox.com>
Subject: Re: [RFC net-next 0/2] net/sched: cls_flower, act_mirred: VXLAN
 redirect using TC

On Mon, Aug 15, 2016 at 02:34:00PM +0200, Jiri Pirko wrote:
> Mon, Aug 15, 2016 at 12:08:10PM CEST, jhs@...atatu.com wrote:
> >On 16-08-15 05:08 AM, Amir Vadai wrote:
> >> On Mon, Aug 15, 2016 at 11:17:40AM +0300, Amir Vadai wrote:
> >> > On Mon, Aug 15, 2016 at 09:11:22AM +0200, Jiri Pirko wrote:
> >> > > Sun, Aug 14, 2016 at 07:53:30PM CEST, xiyou.wangcong@...il.com wrote:
> >
> >> > 
> >> > Thanks,
> >> > Amir
> >> 
> >> Any objection to the following?
> >> 
> >> # ENCAP rule
> >> tc filter add dev $ETH protocol ip parent ffff: prio 10 \
> >> 		flower ip_proto 1 \
> >> 		action set_tunnel_key src_ip 11.11.0.1 dst_ip 11.11.0.2 key_id 11 dst_port 4789 \
> >> 		action mirred egress redirect dev $VXLAN
> >
> >Assuming $VXLAN is actually not a linux netdev of type vxlan?
> >then the action does vxlan encap redirect sends it to the $VXLAN
> >dev with encapsulation in place.
> >Sounds to me like a name like "vxlan" would be more usable. Example:
> 
> I believe those are generic tunelling data
> 
> 
> >
> >tc filter add dev $ETH protocol ip parent ffff: prio 10 ..
> >action vxlan encap src_ip 11.11.0.1 dst_ip 11.11.0.2 key_id 11 ....
> >action mirred egress redirect dev eth0
> >
> >> 
> >> # DECAP rule
> >> tc filter add dev $VXLAN protocol ip parent ffff: prio 10 \
> >> 		flower \
> >> 			enc_src_ip 11.11.0.2 enc_dst_ip 11.11.0.1 enc_key_id 11 \
> >> 			ip_proto 1 \
> >> 		action mirred egress redirect dev $ETH
> >> 
> >
> >And a decap would be of the form:
> >tc filter add dev $ETH protocol ip parent ffff: prio 10 ..
> >action vxlan decap
> 
> That's right. Amir, don't you need decap here to drop the tunnel
> metadata?
Right. will add a decap that will release it.

> 
> 
> >
> >i.e there is no redirect needed here, no?
> >
> >cheers,
> >jamal