linux-kernel - [PATCH v4 bpf-next 0/4] cgroup bpf auto-detachment

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Message-ID: <20190524235156.4076591-1-guro@fb.com>
Date:   Fri, 24 May 2019 16:51:52 -0700
From:   Roman Gushchin <guro@...com>
To:     Alexei Starovoitov <ast@...nel.org>, <bpf@...r.kernel.org>
CC:     Daniel Borkmann <daniel@...earbox.net>, <netdev@...r.kernel.org>,
        Tejun Heo <tj@...nel.org>, <kernel-team@...com>,
        <cgroups@...r.kernel.org>, Stanislav Fomichev <sdf@...ichev.me>,
        Yonghong Song <yhs@...com>, <linux-kernel@...r.kernel.org>,
        Roman Gushchin <guro@...com>
Subject: [PATCH v4 bpf-next 0/4] cgroup bpf auto-detachment

This patchset implements a cgroup bpf auto-detachment functionality:
bpf programs are detached as soon as possible after removal of the
cgroup, without waiting for the release of all associated resources.

Patches 2 and 3 are required to implement a corresponding kselftest
in patch 4.

v4:
  1) release cgroup bpf data using a workqueue
  2) add test_cgroup_attach to .gitignore

v3:
  1) some minor changes and typo fixes

v2:
  1) removed a bogus check in patch 4
  2) moved buf[len] = 0 in patch 2


Roman Gushchin (4):
  bpf: decouple the lifetime of cgroup_bpf from cgroup itself
  selftests/bpf: convert test_cgrp2_attach2 example into kselftest
  selftests/bpf: enable all available cgroup v2 controllers
  selftests/bpf: add auto-detach test

 include/linux/bpf-cgroup.h                    |  11 +-
 include/linux/cgroup.h                        |  18 +++
 kernel/bpf/cgroup.c                           |  41 ++++-
 kernel/cgroup/cgroup.c                        |  11 +-
 samples/bpf/Makefile                          |   2 -
 tools/testing/selftests/bpf/.gitignore        |   1 +
 tools/testing/selftests/bpf/Makefile          |   4 +-
 tools/testing/selftests/bpf/cgroup_helpers.c  |  57 +++++++
 .../selftests/bpf/test_cgroup_attach.c        | 146 ++++++++++++++++--
 9 files changed, 262 insertions(+), 29 deletions(-)
 rename samples/bpf/test_cgrp2_attach2.c => tools/testing/selftests/bpf/test_cgroup_attach.c (79%)

-- 
2.21.0