netdev - Re: [PATCH net-next] net/sched: cls_flower: Introduce support in SKIP SW flag

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Date:	Wed, 8 Jun 2016 09:04:43 +0300
From:	Amir Vadai <amir@...ai.me>
To:	John Fastabend <john.fastabend@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Jiri Pirko <jiri@...lanox.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Hadar Har-Zion <hadarh@...lanox.com>,
	Amir Vadai <amirva@...lanox.com>
Subject: Re: [PATCH net-next] net/sched: cls_flower: Introduce support in
 SKIP SW flag

On Tue, Jun 07, 2016 at 08:37:40AM -0700, John Fastabend wrote:
> On 16-06-05 07:11 AM, Amir Vadai wrote:
> > From: Amir Vadai <amirva@...lanox.com>
> > 
> > In order to make a filter processed only by hardware, skip_sw flag
> > should be supplied. This is an addition to the already existing skip_hw
> > flag (filter will be processed by software only). If no flag is
> > specified, filter will be processed by both software and hardware.
> > 
> > If only hardware offloaded filters exist, fl_classify() will return
> > without doing anything.
> > 
> > A following userspace patch will be sent once kernel patch is accepted.
> > 
> > Example:
> > 
> > tc filter add dev enp0s9 protocol ip prio 20 parent ffff: \
> > 	flower \
> > 		ip_proto 6 \
> > 		indev enp0s9 \
> > 		skip_sw \
> > 	action skbedit mark 0x1234
> > 
> > Signed-off-by: Amir Vadai <amirva@...lanox.com>
> > ---
> 
> 
> 
> Looks good to me. Although we need to do the same error propagation in
> flower that Jakub just added to cls_u32.
Thanks John,
I will send a patch to return error when add to hw is failing and skip_sw
is set.

> 
> Acked-by: John Fastabend <john.r.fastabend@...el.com>
>