1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2019 Carlos Neira cneirabustos@gmail.com */
3 
4 #include <linux/bpf.h>
5 #include <stdint.h>
6 #include <bpf/bpf_helpers.h>
7 
8 __u64 user_pid = 0;
9 __u64 user_tgid = 0;
10 __u64 dev = 0;
11 __u64 ino = 0;
12 
13 SEC("tracepoint/syscalls/sys_enter_nanosleep")
handler(const void * ctx)14 int handler(const void *ctx)
15 {
16 	struct bpf_pidns_info nsdata;
17 
18 	if (bpf_get_ns_current_pid_tgid(dev, ino, &nsdata, sizeof(struct bpf_pidns_info)))
19 		return 0;
20 
21 	user_pid = nsdata.pid;
22 	user_tgid = nsdata.tgid;
23 
24 	return 0;
25 }
26 
27 char _license[] SEC("license") = "GPL";
28