netdev - Re: [bpf PATCH] samples/bpf: all XDP samples should unload xdp/bpf prog on SIGTERM

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Date:   Wed, 15 Aug 2018 08:47:19 -0700
From:   Y Song <ys114321@...il.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     Daniel Borkmann <borkmann@...earbox.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        netdev <netdev@...r.kernel.org>, jhsiao@...hat.com
Subject: Re: [bpf PATCH] samples/bpf: all XDP samples should unload xdp/bpf
 prog on SIGTERM

On Wed, Aug 15, 2018 at 7:57 AM, Jesper Dangaard Brouer
<brouer@...hat.com> wrote:
> It is common XDP practice to unload/deattach the XDP bpf program,
> when the XDP sample program is Ctrl-C interrupted (SIGINT) or
> killed (SIGTERM).
>
> The samples/bpf programs xdp_redirect_cpu and xdp_rxq_info,
> forgot to trap signal SIGTERM (which is the default signal used
> by the kill command).
>
> This was discovered by Red Hat QA, which automated scripts depend
> on killing the XDP sample program after a timeout period.
>
> Fixes: fad3917e361b ("samples/bpf: add cpumap sample program xdp_redirect_cpu")
> Fixes: 0fca931a6f21 ("samples/bpf: program demonstrating access to xdp_rxq_info")
> Reported-by: Jean-Tsung Hsiao <jhsiao@...hat.com>
> Signed-off-by: Jesper Dangaard Brouer <brouer@...hat.com>

Acked-by: Yonghong Song <yhs@...com>

> ---
>  samples/bpf/xdp_redirect_cpu_user.c |    3 ++-
>  samples/bpf/xdp_rxq_info_user.c     |    3 ++-
>  2 files changed, 4 insertions(+), 2 deletions(-)