netdev - Re: [PATCH v2 1/4] ipv4: add option to drop unicast encapsulated in L2 multicast

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Message-ID: <1446672958.13649.4.camel@sipsolutions.net>
Date:	Wed, 04 Nov 2015 22:35:58 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Julian Anastasov <ja@....bg>
Cc:	linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2 1/4] ipv4: add option to drop unicast encapsulated in
 L2 multicast

On Wed, 2015-11-04 at 22:59 +0200, Julian Anastasov wrote:
> 
>         Patches 1 and 3 look correct to me,
> 
> Reviewed-by: Julian Anastasov <ja@....bg>

Thanks for checking!

>         If the patches are lost in the merge window you
> can also consider one minor optimization, see below...

Oh, yeah, they probably are - sorry Dave.

> > -     } else if (rt->rt_type == RTN_BROADCAST)
> > +     } else if (rt->rt_type == RTN_BROADCAST) {
> >               IP_UPD_PO_STATS_BH(net, IPSTATS_MIB_INBCAST, skb-
> >len);
> > +     } else {
> 
>         } else if (unlikely(skb->pkt_type != PACKET_HOST)) {
> 
>         May be such check can save some cycles because
> it is more common to see PACKET_HOST packets...

I had thought about that based on your earlier comments, but then I
didn't quite see the point. However, perhaps we could invert the check
below to check the pkt_type first, hoping it'll have some kind of cache
effect?

johannes
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