netdev - Re: [PATCH bpf-next v7 5/8] selftests/bpf: Test cgroup

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Date:   Mon, 8 Aug 2022 18:18:33 -0700
From:   Hao Luo <haoluo@...gle.com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        cgroups@...r.kernel.org, netdev@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>,
        KP Singh <kpsingh@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        John Fastabend <john.fastabend@...il.com>,
        Michal Koutny <mkoutny@...e.com>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        David Rientjes <rientjes@...gle.com>,
        Stanislav Fomichev <sdf@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Yosry Ahmed <yosryahmed@...gle.com>
Subject: Re: [PATCH bpf-next v7 5/8] selftests/bpf: Test cgroup_iter.

On Mon, Aug 8, 2022 at 5:20 PM Andrii Nakryiko
<andrii.nakryiko@...il.com> wrote:
>
> On Fri, Aug 5, 2022 at 2:49 PM Hao Luo <haoluo@...gle.com> wrote:
> >
> > Add a selftest for cgroup_iter. The selftest creates a mini cgroup tree
> > of the following structure:
> >
> >     ROOT (working cgroup)
> >      |
> >    PARENT
> >   /      \
> > CHILD1  CHILD2
> >
> > and tests the following scenarios:
> >
> >  - invalid cgroup fd.
> >  - pre-order walk over descendants from PARENT.
> >  - post-order walk over descendants from PARENT.
> >  - walk of ancestors from PARENT.
> >  - walk from PARENT in the default order, which is pre-order.
> >  - process only a single object (i.e. PARENT).
> >  - early termination.
> >
> > Acked-by: Yonghong Song <yhs@...com>
> > Signed-off-by: Hao Luo <haoluo@...gle.com>
> > ---
>
> LGTM.
>
> Acked-by: Andrii Nakryiko <andrii@...nel.org>
>

Thanks!

> >  .../selftests/bpf/prog_tests/cgroup_iter.c    | 237 ++++++++++++++++++
> >  tools/testing/selftests/bpf/progs/bpf_iter.h  |   7 +
> >  .../testing/selftests/bpf/progs/cgroup_iter.c |  39 +++
> >  3 files changed, 283 insertions(+)
> >  create mode 100644 tools/testing/selftests/bpf/prog_tests/cgroup_iter.c
> >  create mode 100644 tools/testing/selftests/bpf/progs/cgroup_iter.c
> >
>
> [...]