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

   1// SPDX-License-Identifier: GPL-2.0-only
   2#include "vmlinux.h"
   3#include <bpf/bpf_helpers.h>
   4#include <bpf/bpf_endian.h>
   5
   6#define TEST_COMM_LEN 16
   7
   8struct {
   9        __uint(type, BPF_MAP_TYPE_CGROUP_ARRAY);
  10        __uint(max_entries, 1);
  11        __type(key, u32);
  12        __type(value, u32);
  13} cgroup_map SEC(".maps");
  14
  15char _license[] SEC("license") = "GPL";
  16
  17SEC("classifier/test_skb_helpers")
  18int test_skb_helpers(struct __sk_buff *skb)
  19{
  20        struct task_struct *task;
  21        char comm[TEST_COMM_LEN];
  22        __u32 tpid;
  23
  24        task = (struct task_struct *)bpf_get_current_task();
  25        bpf_probe_read_kernel(&tpid , sizeof(tpid), &task->tgid);
  26        bpf_probe_read_kernel_str(&comm, sizeof(comm), &task->comm);
  27        return 0;
  28}
  29