netdev - Re: [PATCH bpf 2/2] tools: bpftool: add error message on pin failure

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Date:   Thu, 8 Aug 2019 11:54:12 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        oss-drivers@...ronome.com, Andy Lutomirski <luto@...nel.org>,
        Quentin Monnet <quentin.monnet@...ronome.com>
Subject: Re: [PATCH bpf 2/2] tools: bpftool: add error message on pin failure

On Tue, Aug 6, 2019 at 5:21 PM Jakub Kicinski
<jakub.kicinski@...ronome.com> wrote:
>
> No error message is currently printed if the pin syscall
> itself fails. It got lost in the loadall refactoring.
>
> Fixes: 77380998d91d ("bpftool: add loadall command")
> Reported-by: Andy Lutomirski <luto@...nel.org>
> Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
> Reviewed-by: Quentin Monnet <quentin.monnet@...ronome.com>
> ---

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

> CC: luto@...nel.org, sdf@...gle.com
>
>  tools/bpf/bpftool/common.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c
> index c52a6ffb8949..6a71324be628 100644
> --- a/tools/bpf/bpftool/common.c
> +++ b/tools/bpf/bpftool/common.c
> @@ -204,7 +204,11 @@ int do_pin_fd(int fd, const char *name)
>         if (err)
>                 return err;
>
> -       return bpf_obj_pin(fd, name);
> +       err = bpf_obj_pin(fd, name);
> +       if (err)
> +               p_err("can't pin the object (%s): %s", name, strerror(errno));
> +
> +       return err;
>  }
>
>  int do_pin_any(int argc, char **argv, int (*get_fd_by_id)(__u32))
> --
> 2.21.0
>