linux-kernel - Re: [PATCH bpf-next v3 4/4] bpf/selftests: Verify struct

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Date:   Wed, 25 Jan 2023 10:33:34 -0600
From:   David Vernet <void@...ifault.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...a.com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Kernel Team <kernel-team@...a.com>, Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH bpf-next v3 4/4] bpf/selftests: Verify struct_ops prog
 sleepable behavior

On Wed, Jan 25, 2023 at 08:06:11AM -0800, Alexei Starovoitov wrote:
> On Tue, Jan 24, 2023 at 9:04 PM David Vernet <void@...ifault.com> wrote:
> >
> > In a set of prior changes, we added the ability for struct_ops programs
> > to be sleepable. This patch enhances the dummy_st_ops selftest suite to
> > validate this behavior by adding a new sleepable struct_ops entry to
> > dummy_st_ops.
> >
> > Signed-off-by: David Vernet <void@...ifault.com>
> > ---
> >  include/linux/bpf.h                           |  1 +
> >  net/bpf/bpf_dummy_struct_ops.c                | 18 +++++++
> >  .../selftests/bpf/prog_tests/dummy_st_ops.c   | 54 ++++++++++++++-----
> >  .../selftests/bpf/progs/dummy_st_ops_fail.c   | 27 ++++++++++
> >  ...{dummy_st_ops.c => dummy_st_ops_success.c} | 19 +++----
> >  5 files changed, 94 insertions(+), 25 deletions(-)
> >  create mode 100644 tools/testing/selftests/bpf/progs/dummy_st_ops_fail.c
> >  rename tools/testing/selftests/bpf/progs/{dummy_st_ops.c => dummy_st_ops_success.c} (72%)
> 
> It fails on s390:
> dummy_st_ops_success/dummy_multiple_args:FAIL
> 
> Please add to DENYLIST as part of this patch.

Sorry, this was just a dumb replace-all mistake on my part -- accidentally
changed the name of the testsuite to dummy_st_ops_success when changing the
name of the BPF prog in prog_tests/dummy_st_ops. It's already in the DENYLIST.
This should fix it:

diff --git a/tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c b/tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c
index 135514fad83a..f43fcb13d2c4 100644
--- a/tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c
+++ b/tools/testing/selftests/bpf/prog_tests/dummy_st_ops.c
@@ -144,7 +144,7 @@ static void test_dummy_sleepable(void)
        dummy_st_ops_success__destroy(skel);
 }

-void test_dummy_st_ops_success(void)
+void test_dummy_st_ops(void)
 {
        if (test__start_subtest("dummy_st_ops_attach"))
                test_dummy_st_ops_attach();


Will send out the v4 with that fix shortly.