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

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Date:	Mon, 15 Aug 2016 14:34:00 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	Jamal Hadi Salim <jhs@...atatu.com>
Cc:	Amir Vadai <amir@...ai.me>, 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

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?


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