selftests/bpf/cgroup_helpers.c

39 #define format_cgroup_path_pid(buf, path, pid) \
41 	CGROUP_WORK_DIR, pid, path)
43 #define format_cgroup_path(buf, path) \
44 	format_cgroup_path_pid(buf, path, getpid())
46 #define format_parent_cgroup_path(buf, path) \
47 	format_cgroup_path_pid(buf, path, getppid())
62 	char path[PATH_MAX + 1];
70 		snprintf(path, sizeof(path), "%s/cgroup.controllers",
72 		fd = open(path, O_RDONLY);
74 			log_err("Opening cgroup.controllers: %s", path);
80 			log_err("Reading cgroup.controllers: %s", path);
92 	snprintf(path, sizeof(path), "%s/cgroup.subtree_control", cgroup_path);
93 	cfd = open(path, O_RDWR);
95 		log_err("Opening cgroup.subtree_control: %s", path);
101 			log_err("Enabling controller %s: %s", c, path);
112  * @relative_path: The cgroup path, relative to the workdir
153  * @relative_path: The cgroup path, relative to the workdir
173  * @relative_path: The cgroup path, relative to the parent process workdir
277  * @relative_path: The cgroup path, relative to the workdir, to join
280  * work dir, and it joins it. For example, passing "/my-cgroup" as the path
308  * @relative_path: The cgroup path, relative to parent process workdir, to join
324  * @relative_path: The cgroup path, relative to the workdir, to set xattr
398  * @relative_path: The cgroup path, relative to the workdir, to remove
417  * @relative_path: The cgroup path, relative to the workdir, to join
446  * get_cgroup_id_from_path - Get cgroup id for a particular cgroup path
447  * @cgroup_workdir: The absolute cgroup path
506 int cgroup_setup_and_join(const char *path) {
514 	cg_fd = create_and_get_cgroup(path);
521 	if (join_cgroup(path)) {