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| author | Hou Tao <houtao1@huawei.com> | 2022-11-21 10:34:39 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-11-21 19:40:42 +0300 |
| commit | 2a42461a88314bbeaa3dcad3d19a4bb3d9aa546f (patch) | |
| tree | 956d1477167a2eb558828be7343a8d657e3adeb9 /tools/testing/selftests/bpf/cgroup_helpers.c | |
| parent | 1a5160d4d8fe63ba4964cfff4a85831b6af75f2d (diff) | |
| download | linux-2a42461a88314bbeaa3dcad3d19a4bb3d9aa546f.tar.xz | |
selftests/bpf: Add cgroup helper remove_cgroup()
Add remove_cgroup() to remove a cgroup which doesn't have any children
or live processes. It will be used by the following patch to test cgroup
iterator on a dead cgroup.
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20221121073440.1828292-3-houtao@huaweicloud.com
Diffstat (limited to 'tools/testing/selftests/bpf/cgroup_helpers.c')
| -rw-r--r-- | tools/testing/selftests/bpf/cgroup_helpers.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/cgroup_helpers.c b/tools/testing/selftests/bpf/cgroup_helpers.c index dd1aa5afcf5a..9e95b37a7dff 100644 --- a/tools/testing/selftests/bpf/cgroup_helpers.c +++ b/tools/testing/selftests/bpf/cgroup_helpers.c @@ -333,6 +333,25 @@ int get_root_cgroup(void) return fd; } +/* + * remove_cgroup() - Remove a cgroup + * @relative_path: The cgroup path, relative to the workdir, to remove + * + * This function expects a cgroup to already be created, relative to the cgroup + * work dir. It also expects the cgroup doesn't have any children or live + * processes and it removes the cgroup. + * + * On failure, it will print an error to stderr. + */ +void remove_cgroup(const char *relative_path) +{ + char cgroup_path[PATH_MAX + 1]; + + format_cgroup_path(cgroup_path, relative_path); + if (rmdir(cgroup_path)) + log_err("rmdiring cgroup %s .. %s", relative_path, cgroup_path); +} + /** * create_and_get_cgroup() - Create a cgroup, relative to workdir, and get the FD * @relative_path: The cgroup path, relative to the workdir, to join |