cgroup.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __CGROUP_H__
 3#define __CGROUP_H__
 4
 5#include <linux/compiler.h>
 6#include <linux/refcount.h>
 7#include <linux/rbtree.h>
 8#include "util/env.h"
 9
10struct option;
11
12struct cgroup {
13	struct rb_node		node;
14	u64			id;
15	char			*name;
16	int			fd;
17	refcount_t		refcnt;
18};
19
20extern int nr_cgroups; /* number of explicit cgroups defined */
21extern bool cgrp_event_expanded;
22
23struct cgroup *cgroup__get(struct cgroup *cgroup);
24void cgroup__put(struct cgroup *cgroup);
25
26struct evlist;
27struct rblist;
28
29struct cgroup *cgroup__new(const char *name, bool do_open);
30struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name);
31int evlist__expand_cgroup(struct evlist *evlist, const char *cgroups, bool open_cgroup);
32
33void evlist__set_default_cgroup(struct evlist *evlist, struct cgroup *cgroup);
34
35int parse_cgroups(const struct option *opt, const char *str, int unset);
36
37struct cgroup *cgroup__findnew(struct perf_env *env, uint64_t id,
38			       const char *path);
39struct cgroup *cgroup__find(struct perf_env *env, uint64_t id);
40struct cgroup *__cgroup__find(struct rb_root *root, uint64_t id);
41
42void perf_env__purge_cgroups(struct perf_env *env);
43
44#ifdef HAVE_FILE_HANDLE
45int read_cgroup_id(struct cgroup *cgrp);
46#else
47static inline int read_cgroup_id(struct cgroup *cgrp __maybe_unused)
48{
49	return -1;
50}
51#endif  /* HAVE_FILE_HANDLE */
52
53/* read all cgroups in the system and save them in the rbtree */
54void read_all_cgroups(struct rb_root *root);
55
56int cgroup_is_v2(const char *subsys);
57
58#endif /* __CGROUP_H__ */