netdev - Re: [PATCH bpf-next v3 3/8] selftests: bpf: Enable CONFIG_IKCONFIG

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Date:   Fri, 6 May 2022 15:25:16 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Mat Martineau <mathew.j.martineau@...ux.intel.com>
Cc:     Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Geliang Tang <geliang.tang@...e.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>, mptcp@...ts.linux.dev
Subject: Re: [PATCH bpf-next v3 3/8] selftests: bpf: Enable
 CONFIG_IKCONFIG_PROC in config

On Mon, May 2, 2022 at 2:12 PM Mat Martineau
<mathew.j.martineau@...ux.intel.com> wrote:
>
> From: Geliang Tang <geliang.tang@...e.com>
>
> CONFIG_IKCONFIG_PROC is required by BPF selftests, otherwise we get
> errors like this:
>
>  libbpf: failed to open system Kconfig
>  libbpf: failed to load object 'kprobe_multi'
>  libbpf: failed to load BPF skeleton 'kprobe_multi': -22
>
> It's because /proc/config.gz is opened in bpf_object__read_kconfig_file()
> in tools/lib/bpf/libbpf.c:
>
>         file = gzopen("/proc/config.gz", "r");
>
> So this patch enables CONFIG_IKCONFIG and CONFIG_IKCONFIG_PROC in
> tools/testing/selftests/bpf/config.
>
> Suggested-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
> Signed-off-by: Geliang Tang <geliang.tang@...e.com>
> Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
> ---

Acked-by: Andrii Nakryiko <andrii@...nel.org>

>  tools/testing/selftests/bpf/config | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/tools/testing/selftests/bpf/config b/tools/testing/selftests/bpf/config
> index 763db63a3890..8d7faff33c54 100644
> --- a/tools/testing/selftests/bpf/config
> +++ b/tools/testing/selftests/bpf/config
> @@ -53,3 +53,5 @@ CONFIG_NF_DEFRAG_IPV4=y
>  CONFIG_NF_DEFRAG_IPV6=y
>  CONFIG_NF_CONNTRACK=y
>  CONFIG_USERFAULTFD=y
> +CONFIG_IKCONFIG=y
> +CONFIG_IKCONFIG_PROC=y
> --
> 2.36.0
>