netdev - Re: [PATCH v4 bpf-next 0/5] bpf: Add support for XDP programs in DEVMAP entries

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Message-ID: <CAADnVQK1rzFfzcQX-EGW57=O2xnz2pjX5madnZGTiAsKnCmbHA@mail.gmail.com>
Date:   Mon, 1 Jun 2020 14:12:45 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     David Ahern <dsahern@...nel.org>
Cc:     Network Development <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        John Fastabend <john.fastabend@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        David Ahern <dsahern@...il.com>
Subject: Re: [PATCH v4 bpf-next 0/5] bpf: Add support for XDP programs in
 DEVMAP entries

On Fri, May 29, 2020 at 3:07 PM David Ahern <dsahern@...nel.org> wrote:
>
> Implementation of Daniel's proposal for allowing DEVMAP entries to be
> a device index, program fd pair.
>
> Programs are run after XDP_REDIRECT and have access to both Rx device
> and Tx device.
>
> v4
> - moved struct bpf_devmap_val from uapi to devmap.c, named the union
>   and dropped the prefix from the elements - Jesper
> - fixed 2 bugs in selftests

Applied.

In patch 5 I had to fix:
/data/users/ast/net-next/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c:
In function ‘test_neg_xdp_devmap_helpers’:
/data/users/ast/net-next/tools/testing/selftests/bpf/test_progs.h:106:3:
warning: ‘duration’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
  106 |   fprintf(stdout, "%s:PASS:%s %d nsec\n",   \
      |   ^~~~~~~
/data/users/ast/net-next/tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c:79:8:
note: ‘duration’ was declared here
   79 |  __u32 duration;

and that selftest is imo too primitive.
It's only loading progs and not executing them.
Could you please add prog_test_run to it?