netdev - Re: [RFC net-next 1/4] net: ipv6: Introduce flowi6_init

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Date:	Mon, 28 Apr 2014 10:07:27 +0300 (EEST)
From:	Julian Anastasov <ja@....bg>
To:	Lorenzo Colitti <lorenzo@...gle.com>
cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	David Miller <davem@...emloft.net>, JP Abgrall <jpa@...gle.com>
Subject: Re: [RFC net-next 1/4] net: ipv6: Introduce flowi6_init_output.


	Hello,

On Sun, 27 Apr 2014, Lorenzo Colitti wrote:

> On Sat, Apr 26, 2014 at 2:56 PM, Julian Anastasov <ja@....bg> wrote:
> >> +     fl6->flowi6_oif = oif;
> >> +     fl6->flowi6_iif = 0;
> >
> >         Make sure LOOPBACK_IFINDEX is provided in
> > flowi6_iif instead of 0, recent commit fixed such
> > FIB rule lookups.
> 
> I'm assuming that was for IPv4? All the IPv6 code in current net-next
> still seems to set flowi6_iif to zero. It's later set to
> LOOPBACK_IFINDEX in ip6_route_output.

	I see, it seems more IPv6 places need a fix.

> You could argue that if this patch is accepted, then setting
> flowi6_iif to LOOPBACK_IFINDEX belongs there for consistency with
> IPv4. That seems reasonable, but I'd prefer not doing that in this
> patch because 1) this patch is semantically a no-op and I'd like to
> keep it that way, 2) it would be a bigger change, because even with
> this patch, there are still codepaths that initialize their own flowi6
> and memset them to zero.

	OK. I'll try a patch to fix the remaining flowi6_iif
places...

Regards

--
Julian Anastasov <ja@....bg>
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