netdev - Re: [PATCH bpf-next 3/5] libbpf: Expose bpf_find_kernel_btf to libbpf

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Date:   Tue, 14 Jan 2020 17:43:58 -0800
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Martin KaFai Lau <kafai@...com>
Cc:     bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        David Miller <davem@...emloft.net>,
        Kernel Team <kernel-team@...com>,
        Networking <netdev@...r.kernel.org>
Subject: Re: [PATCH bpf-next 3/5] libbpf: Expose bpf_find_kernel_btf to libbpf_internal.h

On Tue, Jan 14, 2020 at 2:44 PM Martin KaFai Lau <kafai@...com> wrote:
>
> This patch exposes bpf_find_kernel_btf() to libbpf_internal.h.
> It will be used in 'bpftool map dump' in a following patch
> to dump a map with btf_vmlinux_value_type_id set.
>
> Signed-off-by: Martin KaFai Lau <kafai@...com>
> ---

This function comes up not a first time, I guess it makes sense to
finally make it a public API. We should also try to minimize number of
internal APIs used by bpftool.

So if no one objects to expose it, should we call it a bit more
precisely and according to libbpf naming guidelines:
libbpf_load_kernel_btf? libbpf_find_kernel_btf is acceptable, but it
does more than just finding, thus "load". It should also probably live
in btf.c+btf.h? WDYT?

>  tools/lib/bpf/libbpf.c          | 3 +--
>  tools/lib/bpf/libbpf_internal.h | 1 +
>  2 files changed, 2 insertions(+), 2 deletions(-)
>

[...]