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
10 struct option;
11
12 struct cgroup {
13 struct rb_node node;
14 u64 id;
15 char *name;
16 int fd;
17 refcount_t refcnt;
18 };
19
20 extern int nr_cgroups; /* number of explicit cgroups defined */
21 extern bool cgrp_event_expanded;
22
23 struct cgroup *cgroup__get(struct cgroup *cgroup);
24 void cgroup__put(struct cgroup *cgroup);
25
26 struct evlist;
27 struct rblist;
28
29 struct cgroup *cgroup__new(const char *name, bool do_open);
30 struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name);
31 int evlist__expand_cgroup(struct evlist *evlist, const char *cgroups, bool open_cgroup);
32
33 void evlist__set_default_cgroup(struct evlist *evlist, struct cgroup *cgroup);
34
35 int parse_cgroups(const struct option *opt, const char *str, int unset);
36
37 struct cgroup *cgroup__findnew(struct perf_env *env, uint64_t id,
38 const char *path);
39 struct cgroup *cgroup__find(struct perf_env *env, uint64_t id);
40 struct cgroup *__cgroup__find(struct rb_root *root, uint64_t id);
41
42 void perf_env__purge_cgroups(struct perf_env *env);
43
44 #ifdef HAVE_FILE_HANDLE
45 int read_cgroup_id(struct cgroup *cgrp);
46 #else
read_cgroup_id(struct cgroup * cgrp __maybe_unused)47 static 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 */
54 void read_all_cgroups(struct rb_root *root);
55
56 int cgroup_is_v2(const char *subsys);
57
58 #endif /* __CGROUP_H__ */
59