netdev - Re: [PATCH bpf-next] bpf: better availability probing for seg6 helpers

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Message-ID: <107fd268-2944-89aa-d565-5a77c41fd44d@iogearbox.net>
Date:   Wed, 11 Jul 2018 22:35:21 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Mathieu Xhonneux <m.xhonneux@...il.com>, netdev@...r.kernel.org
Cc:     alexei.starovoitov@...il.com
Subject: Re: [PATCH bpf-next] bpf: better availability probing for seg6
 helpers

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 <m.xhonneux@...il.com>
> 
> 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!