LXR linux/tools/testing/selftests/bpf/progs/test_ns_current_pid

   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
  13SEC("tracepoint/syscalls/sys_enter_nanosleep")
  14int 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
  27char _license[] SEC("license") = "GPL";
  28