1// SPDX-License-Identifier: GPL-2.0
 2// Copyright (c) 2018 Facebook
 3
 4#include <linux/bpf.h>
 5#include <bpf/bpf_helpers.h>
 6
 7__u64 cg_id;
 8__u64 expected_pid;
 9
10SEC("tracepoint/syscalls/sys_enter_nanosleep")
11int trace(void *ctx)
12{
13	__u32 pid = bpf_get_current_pid_tgid();
14
15	if (expected_pid == pid)
16		cg_id = bpf_get_current_cgroup_id();
17
18	return 0;
19}
20
21char _license[] SEC("license") = "GPL";