linux-kernel - RE: [PATCH bpf-next 1/2] bpf: Add ifindex to bpf_sk

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Date:   Thu, 21 Oct 2021 12:00:11 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     Mark Pashmfouroush <markpash@...udflare.com>,
        markpash@...udflare.com
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Shuah Khan <shuah@...nel.org>,
        Florent Revest <revest@...omium.org>,
        Brendan Jackman <jackmanb@...gle.com>,
        Joe Stringer <joe@...ium.io>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Hangbin Liu <liuhangbin@...il.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Lorenz Bauer <lmb@...udflare.com>,
        Dave Marchevsky <davemarchevsky@...com>,
        Luke Nelson <luke.r.nels@...il.com>,
        Björn Töpel <bjorn@...nel.org>,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: RE: [PATCH bpf-next 1/2] bpf: Add ifindex to bpf_sk_lookup

Mark Pashmfouroush wrote:
> It may be helpful to have access to the ifindex during bpf socket
> lookup. Add this to the bpf_sk_lookup API.
> 
> Signed-off-by: Mark Pashmfouroush <markpash@...udflare.com>
> 

Would be nice to have more details on the 'use case' here. I
don't know off-hand how it 'may be helpful'.

For the actual code though LGTM.

Acked-by: John Fastabend <john.fastabend@...il.com>