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Date:   Wed, 11 Jul 2018 22:35:21 +0200
From:   Daniel Borkmann <>
To:     Mathieu Xhonneux <>,
Subject: Re: [PATCH bpf-next] bpf: better availability probing for seg6

On 07/10/2018 09:20 PM, Daniel Borkmann wrote:
> On 07/10/2018 06:54 PM, Mathieu Xhonneux wrote:
>> bpf_lwt_seg6_* helpers require CONFIG_IPV6_SEG6_BPF, and currently
>> return -EOPNOTSUPP to indicate unavailability. This patch forces the
>> BPF verifier to reject programs using these helpers when
>> !CONFIG_IPV6_SEG6_BPF, allowing users to more easily probe if they are
>> available or not.
>> Signed-off-by: Mathieu Xhonneux <>
> Note, just fyi, this would need to go to bpf tree (and not bpf-next) as
> otherwise there's a change in behavior.

Applied, thanks Mathieu!

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