diff options
Diffstat (limited to 'tools/perf/util/cgroup.c')
| -rw-r--r-- | tools/perf/util/cgroup.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c index f24ab4585553..ef18c988c681 100644 --- a/tools/perf/util/cgroup.c +++ b/tools/perf/util/cgroup.c @@ -45,6 +45,31 @@ static int open_cgroup(const char *name) return fd; } +#ifdef HAVE_FILE_HANDLE +int read_cgroup_id(struct cgroup *cgrp) +{ + char path[PATH_MAX + 1]; + char mnt[PATH_MAX + 1]; + struct { + struct file_handle fh; + uint64_t cgroup_id; + } handle; + int mount_id; + + if (cgroupfs_find_mountpoint(mnt, PATH_MAX + 1, "perf_event")) + return -1; + + scnprintf(path, PATH_MAX, "%s/%s", mnt, cgrp->name); + + handle.fh.handle_bytes = sizeof(handle.cgroup_id); + if (name_to_handle_at(AT_FDCWD, path, &handle.fh, &mount_id, 0) < 0) + return -1; + + cgrp->id = handle.cgroup_id; + return 0; +} +#endif /* HAVE_FILE_HANDLE */ + static struct cgroup *evlist__find_cgroup(struct evlist *evlist, const char *str) { struct evsel *counter; |