tools/perf/util/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
  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,
  32                           struct rblist *metric_events, bool open_cgroup);
  33
  34 void evlist__set_default_cgroup(struct evlist *evlist, struct cgroup *cgroup);
  35
  36 int parse_cgroups(const struct option *opt, const char *str, int unset);
  37
  38 struct cgroup *cgroup__findnew(struct perf_env *env, uint64_t id,
  39                                const char *path);
  40 struct cgroup *cgroup__find(struct perf_env *env, uint64_t id);
  41 struct cgroup *__cgroup__find(struct rb_root *root, uint64_t id);
  42
  43 void perf_env__purge_cgroups(struct perf_env *env);
  44
  45 #ifdef HAVE_FILE_HANDLE
  46 int read_cgroup_id(struct cgroup *cgrp);
  47 #else
  48 static inline int read_cgroup_id(struct cgroup *cgrp __maybe_unused)
  49 {
  50         return -1;
  51 }
  52 #endif  /* HAVE_FILE_HANDLE */
  53
  54 /* read all cgroups in the system and save them in the rbtree */
  55 void read_all_cgroups(struct rb_root *root);
  56
  57 int cgroup_is_v2(const char *subsys);
  58
  59 #endif /* __CGROUP_H__ */