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__ */ 60