Re: [PATCH bpf-next v4 00/12] bpf: Support dumping kfunc prototypes from BTF

[Daniel Xu]

On Sat, Jun 08, 2024 at 03:15:56PM GMT, Daniel Xu wrote:
> This patchset enables both detecting as well as dumping compilable
> prototypes for kfuncs.
> 
> The first commit instructs pahole to DECL_TAG kfuncs when available.
> This requires v1.27 or newer. v1.27 is nearing release at time of
> writing. Following this, users will be able to look at BTF inside
> vmlinux (or modules) and check if the kfunc they want is available.
> 
> The final commit teaches bpftool how to dump kfunc prototypes. This
> is done for developer convenience.
> 
> The rest of the commits are fixups to enable selftests to use the
> newly dumped kfunc prototypes. With these, selftests will regularly
> exercise the newly added codepaths.

I tested that this patchset works for both pahole:

    <1.27: https://github.com/kernel-patches/bpf/pull/7168
    >=1.27: https://github.com/kernel-patches/bpf/pull/7163

I meant to include that in the cover letter but I forgot. I'll try to
remember next time.