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Date: Thu, 1 Aug 2013 18:23:25 +0400
From: Gleb Smirnoff <glebius@FreeBSD.org>
To: Hiroki Sato <hrs@FreeBSD.org>
Subject: Re: svn commit: r253841 - head/sys/netinet6
Message-ID: <20130801142324.GG20104@FreeBSD.org>
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On Wed, Jul 31, 2013 at 04:24:50PM +0000, Hiroki Sato wrote:
H> Author: hrs
H> Date: Wed Jul 31 16:24:49 2013
H> New Revision: 253841
H> URL: http://svnweb.freebsd.org/changeset/base/253841
H> 
H> Log:
H>   Allocate in6_ifextra (ifp->if_afdata[AF_INET6]) only for IPv6-capable
H>   interfaces.  This eliminates unnecessary IPv6 processing for non-IPv6
H>   interfaces.
H>   
H>   MFC after:	3 days
H> 
H> Modified:
H>   head/sys/netinet6/in6.c
H>   head/sys/netinet6/in6_ifattach.c
H>   head/sys/netinet6/nd6.c
H> 
H> Modified: head/sys/netinet6/in6.c
H> ==============================================================================
H> --- head/sys/netinet6/in6.c	Wed Jul 31 15:55:01 2013	(r253840)
H> +++ head/sys/netinet6/in6.c	Wed Jul 31 16:24:49 2013	(r253841)
H> @@ -2746,6 +2746,13 @@ in6_domifattach(struct ifnet *ifp)
H>  {
H>  	struct in6_ifextra *ext;
H>  
H> +	/* There are not IPv6-capable interfaces. */
H> +	switch (ifp->if_type) {
H> +	case IFT_PFLOG:
H> +	case IFT_PFSYNC:
H> +	case IFT_USB:
H> +		return (NULL);
H> +	}

All three should just disappear as interfaces :)

-- 
Totus tuus, Glebius.