netdev - Re: [PATCH nf-next] netfilter: nf

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Message-ID: <bf148d57-dab9-0e25-d406-332d1b28f045@6wind.com>
Date:   Tue, 6 Sep 2022 08:57:12 +0200
From:   Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:     Florian Westphal <fw@...len.de>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Network Development <netdev@...r.kernel.org>,
        Toke Høiland-Jørgensen <toke@...nel.org>,
        netfilter-devel <netfilter-devel@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH nf-next] netfilter: nf_tables: add ebpf expression


Le 31/08/2022 à 23:57, Florian Westphal a écrit :
> Alexei Starovoitov <alexei.starovoitov@...il.com> wrote:
>>> This helps gradually moving towards move epbf for those that
>>> still heavily rely on the classic forwarding path.
>>
>> No one is using it.
>> If it was, we would have seen at least one bug report over
>> all these years. We've seen none.
> 
> Err, it IS used, else I would not have sent this patch.
> 
>> very reasonable early on and turned out to be useless with
>> zero users.
>> BPF_PROG_TYPE_SCHED_ACT and BPF_PROG_TYPE_LWT*
>> are in this category.
> 
> I doubt it had 0 users.  Those users probably moved to something
> better?
We are using BPF_PROG_TYPE_SCHED_ACT to perform custom encapsulations.
What could we used to replace that?