linux-kernel - Re: [PATCH] tools/bpf/bpftool: Fix wrong return value in do

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Message-ID: <CAEf4Bza0C3iB3S8wXkkQxPoE+ndNuUtkmU3L8g7NzMgjHzkx8Q@mail.gmail.com>
Date:   Sun, 2 Aug 2020 18:16:58 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin Lau <kafai@...com>, Song Liu <songliubraving@...com>,
        Yonghong Song <yhs@...com>, Andrii Nakryiko <andriin@...com>,
        john fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Quentin Monnet <quentin@...valent.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Tobias Klauser <tklauser@...tanz.ch>,
        Jiri Olsa <jolsa@...nel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        tianjia.zhang@...baba.com
Subject: Re: [PATCH] tools/bpf/bpftool: Fix wrong return value in do_dump()

On Sun, Aug 2, 2020 at 4:16 AM Tianjia Zhang
<tianjia.zhang@...ux.alibaba.com> wrote:
>
> In case of btf_id does not exist, a negative error code -ENOENT
> should be returned.
>
> Fixes: c93cc69004df3 ("bpftool: add ability to dump BTF types")
> Cc: Andrii Nakryiko <andriin@...com>
> Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
> ---


Acked-by: Andrii Nakryiko <andriin@...com>

>  tools/bpf/bpftool/btf.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
> index faac8189b285..c2f1fd414820 100644
> --- a/tools/bpf/bpftool/btf.c
> +++ b/tools/bpf/bpftool/btf.c
> @@ -596,7 +596,7 @@ static int do_dump(int argc, char **argv)
>                         goto done;
>                 }
>                 if (!btf) {
> -                       err = ENOENT;
> +                       err = -ENOENT;
>                         p_err("can't find btf with ID (%u)", btf_id);
>                         goto done;
>                 }
> --
> 2.26.2
>