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21bcc72661
The cgroup_is_v2() is to check if the given subsystem is mounted on cgroup v2 or not. It'll be used by BPF cgroup code later. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Ian Rogers <irogers@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <songliubraving@fb.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20210625071826.608504-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __CGROUP_H__
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#define __CGROUP_H__
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#include <linux/compiler.h>
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#include <linux/refcount.h>
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#include <linux/rbtree.h>
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#include "util/env.h"
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struct option;
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struct cgroup {
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struct rb_node node;
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u64 id;
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char *name;
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int fd;
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refcount_t refcnt;
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};
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extern int nr_cgroups; /* number of explicit cgroups defined */
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struct cgroup *cgroup__get(struct cgroup *cgroup);
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void cgroup__put(struct cgroup *cgroup);
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struct evlist;
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struct rblist;
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struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name);
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int evlist__expand_cgroup(struct evlist *evlist, const char *cgroups,
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struct rblist *metric_events, bool open_cgroup);
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void evlist__set_default_cgroup(struct evlist *evlist, struct cgroup *cgroup);
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int parse_cgroups(const struct option *opt, const char *str, int unset);
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struct cgroup *cgroup__findnew(struct perf_env *env, uint64_t id,
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const char *path);
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struct cgroup *cgroup__find(struct perf_env *env, uint64_t id);
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void perf_env__purge_cgroups(struct perf_env *env);
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#ifdef HAVE_FILE_HANDLE
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int read_cgroup_id(struct cgroup *cgrp);
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#else
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static inline int read_cgroup_id(struct cgroup *cgrp __maybe_unused)
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{
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return -1;
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}
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#endif /* HAVE_FILE_HANDLE */
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int cgroup_is_v2(const char *subsys);
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#endif /* __CGROUP_H__ */
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