netdev - Re: [PATCH net-next] net: Fix vti use case with oif in dst lookups for IPv6

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Message-ID: <20151009071710.GJ7701@secunet.com>
Date:	Fri, 9 Oct 2015 09:17:10 +0200
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	Hajime Tazaki <thehajime@...il.com>
CC:	<dsa@...ulusnetworks.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] net: Fix vti use case with oif in dst lookups
 for IPv6

On Fri, Oct 09, 2015 at 03:54:22PM +0900, Hajime Tazaki wrote:
> 
> Hello David,
> 
> At Mon,  5 Oct 2015 08:32:51 -0600,
> David Ahern wrote:
> 
> > 
> > diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
> > index 30caa289c5db..5cedfda4b241 100644
> > --- a/net/ipv6/xfrm6_policy.c
> > +++ b/net/ipv6/xfrm6_policy.c
> > @@ -37,6 +37,7 @@ static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, int oif,
> >  
> >  	memset(&fl6, 0, sizeof(fl6));
> >  	fl6.flowi6_oif = oif;
> > +	fl6.flowi6_flags = FLOWI_FLAG_SKIP_NH_OIF;
> >  	memcpy(&fl6.daddr, daddr, sizeof(fl6.daddr));
> >  	if (saddr)
> >  		memcpy(&fl6.saddr, saddr, sizeof(fl6.saddr));
> 
> I found that this fix is still not sufficient with the mip6
> (Mobile IPv6) use case.

It does not even fix the vti case. The behaviour of the vti devices is
the same, with and without the patch.
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