netdev - Re: [PATCHv4 bpf-next 3/5] selftests/bpf: Add re-attach test to fexit

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Date:   Wed, 14 Apr 2021 13:01:53 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     Jiri Olsa <jolsa@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andriin@...com>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Julia Lawall <julia.lawall@...ia.fr>
Subject: Re: [PATCHv4 bpf-next 3/5] selftests/bpf: Add re-attach test to
 fexit_test

On Tue, Apr 13, 2021 at 02:55:32PM -0700, Andrii Nakryiko wrote:
> On Mon, Apr 12, 2021 at 9:30 AM Jiri Olsa <jolsa@...nel.org> wrote:
> >
> > Adding the test to re-attach (detach/attach again) tracing
> > fexit programs, plus check that already linked program can't
> > be attached again.
> >
> > Also switching to ASSERT* macros.
> >
> > Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> > ---
> >  .../selftests/bpf/prog_tests/fexit_test.c     | 51 +++++++++++++------
> >  1 file changed, 36 insertions(+), 15 deletions(-)
> >
> > diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_test.c b/tools/testing/selftests/bpf/prog_tests/fexit_test.c
> > index 78d7a2765c27..c48e10c138bc 100644
> > --- a/tools/testing/selftests/bpf/prog_tests/fexit_test.c
> > +++ b/tools/testing/selftests/bpf/prog_tests/fexit_test.c
> > @@ -3,35 +3,56 @@
> >  #include <test_progs.h>
> >  #include "fexit_test.skel.h"
> >
> > -void test_fexit_test(void)
> > +static int fexit_test(struct fexit_test *fexit_skel)
> >  {
> > -       struct fexit_test *fexit_skel = NULL;
> >         int err, prog_fd, i;
> >         __u32 duration = 0, retval;
> > +       struct bpf_link *link;
> >         __u64 *result;
> >
> > -       fexit_skel = fexit_test__open_and_load();
> > -       if (CHECK(!fexit_skel, "fexit_skel_load", "fexit skeleton failed\n"))
> > -               goto cleanup;
> > -
> >         err = fexit_test__attach(fexit_skel);
> > -       if (CHECK(err, "fexit_attach", "fexit attach failed: %d\n", err))
> > -               goto cleanup;
> > +       if (!ASSERT_OK(err, "fexit_attach"))
> > +               return err;
> > +
> > +       /* Check that already linked program can't be attached again. */
> > +       link = bpf_program__attach(fexit_skel->progs.test1);
> > +       if (!ASSERT_ERR_PTR(link, "fexit_attach_link"))
> > +               return -1;
> >
> >         prog_fd = bpf_program__fd(fexit_skel->progs.test1);
> >         err = bpf_prog_test_run(prog_fd, 1, NULL, 0,
> >                                 NULL, NULL, &retval, &duration);
> > -       CHECK(err || retval, "test_run",
> > -             "err %d errno %d retval %d duration %d\n",
> > -             err, errno, retval, duration);
> > +       ASSERT_OK(err || retval, "test_run");
> 
> same as in previous patch
> 
> With this fixed, feel free to add my ack to this and previous patch. Thanks!

ok, thanks,
jirka