netdev - Re: [PATCH bpf-next v3 2/3] libbpf: add bpf_object__load_xattr() API function to pass log

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Date:   Tue, 28 May 2019 17:35:57 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Quentin Monnet <quentin.monnet@...ronome.com>
Cc:     Daniel Borkmann <daniel@...earbox.net>, bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        oss-drivers@...ronome.com, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>
Subject: Re: [PATCH bpf-next v3 2/3] libbpf: add bpf_object__load_xattr() API
 function to pass log_level

On Fri, May 24, 2019 at 3:36 AM Quentin Monnet
<quentin.monnet@...ronome.com> wrote:
>
> libbpf was recently made aware of the log_level attribute for programs,
> used to specify the level of information expected to be dumped by the
> verifier. Function bpf_prog_load_xattr() got support for this log_level
> parameter.
>
> But some applications using libbpf rely on another function to load
> programs, bpf_object__load(), which does accept any parameter for log
> level. Create an API function based on bpf_object__load(), but accepting
> an "attr" object as a parameter. Then add a log_level field to that
> object, so that applications calling the new bpf_object__load_xattr()
> can pick the desired log level.
>
> v3:
> - Rewrite commit log.
>
> v2:
> - We are in a new cycle, bump libbpf extraversion number.
>
> Signed-off-by: Quentin Monnet <quentin.monnet@...ronome.com>
> Reviewed-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
> ---
>  tools/lib/bpf/Makefile   |  2 +-
>  tools/lib/bpf/libbpf.c   | 20 +++++++++++++++++---
>  tools/lib/bpf/libbpf.h   |  6 ++++++
>  tools/lib/bpf/libbpf.map |  5 +++++
>  4 files changed, 29 insertions(+), 4 deletions(-)

This commit broke ./test_progs -s
prog_tests/bpf_verif_scale.c no longer passes log_level.
Could you please take a look?