This patchset implements a cgroup bpf auto-detachment functionality: bpf programs are attached 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. 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 | 8 +- include/linux/cgroup.h | 18 +++ kernel/bpf/cgroup.c | 25 ++- kernel/cgroup/cgroup.c | 11 +- samples/bpf/Makefile | 2 - tools/testing/selftests/bpf/Makefile | 4 +- tools/testing/selftests/bpf/cgroup_helpers.c | 57 +++++++ .../selftests/bpf/test_cgroup_attach.c | 145 ++++++++++++++++-- 8 files changed, 243 insertions(+), 27 deletions(-) rename samples/bpf/test_cgrp2_attach2.c => tools/testing/selftests/bpf/test_cgroup_attach.c (79%) -- 2.20.1
