linux-kernel - Re: [PATCH v2] IPv6: sr: Fix End.X nexthop to use oif.

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Message-ID: <CAA8Zg7FQL6Ong+70qpbh23ooORJ0C5_mZGCP_Tjw2zYHQBKxAw@mail.gmail.com>
Date:   Tue, 20 Oct 2020 17:55:20 +0530
From:   Reji Thomas <rejithomas.d@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Reji Thomas <rejithomas@...iper.net>, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel test robot <lkp@...el.com>,
        Mathieu Xhonneux <m.xhonneux@...il.com>,
        David Lebrun <david.lebrun@...ouvain.be>
Subject: Re: [PATCH v2] IPv6: sr: Fix End.X nexthop to use oif.

On Mon, Oct 19, 2020 at 9:47 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> If we can save the device lookup and still be semantically correct,
> that's probably better.
I am afraid we need to do a device lookup if I am looking up the
neighbor. neigh_lookup
apis expect dev to be passed. If I go through the current lookup ie
ip6_pol_route() I can
drop the dev lookup at risk of returning a non neighbor route as it
exists today.