Re: [PATCH bpf-next 2/6] bpftool: stop supporting BPF offload-enabled feature probing

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Hi Quentin and Andrii,

Sorry for late reply.

On 2022-02-03 10:24:57 +0000, Quentin Monnet wrote:
> Thanks for the Cc. This feature was added for Netronome's SmartNICs 
> and I don't work with them anymore, so no objection from me (if 
> anything, that's one more incentive to finalise the new versioning 
> scheme and have this change under a new major version number!).
> 
> +Cc Simon, David: Hi! If you folks are still using bpftool to probe
> eBPF-related features supported by the NICs, we'll have to move the
> probes to bpftool.

We do use this feature and it is something we would like to keep.

Do I understand the situation correctly that in order to keep the 
functionality in bpftool the functionality of bpf_probe_prog_type(), 
bpf_probe_map_type() and bpf_probe_helper() needs to me moved from 
libbpf to bpftool and used if probing an NIC's features (ifindex 
provided) while using the new libbpf functions if not? And the reason 
for this being that libbpf going forward will not support probing of NIC 
features?

Is this something that can be added to this series as to avoid a release 
where this feature is missing?

-- 
Regards,
Niklas Söderlund



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