netdev - Re: [net PATCH v3 1/1] net_sched fix: reclassification needs to consider ether protocol changes

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Message-ID: <56C5BC68.9060705@iogearbox.net>
Date:	Thu, 18 Feb 2016 13:43:20 +0100
From:	Daniel Borkmann <daniel@...earbox.net>
To:	Jamal Hadi Salim <jhs@...atatu.com>, davem@...emloft.net
CC:	netdev@...r.kernel.org, xiyou.wangcong@...il.com
Subject: Re: [net PATCH v3 1/1] net_sched fix: reclassification needs to consider
 ether protocol changes

On 02/18/2016 01:38 PM, Jamal Hadi Salim wrote:
> From: Jamal Hadi Salim <jhs@...atatu.com>
>
> actions could change the etherproto in particular with ethernet
> tunnelled data. Typically such actions, after peeling the outer header,
> will ask for the packet to be  reclassified. We then need to restart
> the classification with the new proto header.
>
> Example setup used to catch this:
> sudo tc qdisc add dev $ETH ingress
> sudo $TC filter add dev $ETH parent ffff: pref 1 protocol 802.1Q \
> u32 match u32 0 0 flowid 1:1 \
> action  vlan pop reclassify
>
> Fixes: 3b3ae880266d ("net: sched: consolidate tc_classify{,_compat}")
> Signed-off-by: Jamal Hadi Salim <jhs@...atatu.com>

Acked-by: Daniel Borkmann <daniel@...earbox.net>