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

   1// SPDX-License-Identifier: GPL-2.0
   2/* Copyright (c) 2021 Isovalent, Inc. */
   3#include <linux/bpf.h>
   4#include <bpf/bpf_helpers.h>
   5
   6struct inner {
   7        __uint(type, BPF_MAP_TYPE_ARRAY);
   8        __type(key, __u32);
   9        __type(value, int);
  10        __uint(max_entries, 4);
  11};
  12
  13struct {
  14        __uint(type, BPF_MAP_TYPE_ARRAY_OF_MAPS);
  15        __uint(max_entries, 0); /* This will make map creation to fail */
  16        __uint(key_size, sizeof(__u32));
  17        __array(values, struct inner);
  18} mim SEC(".maps");
  19
  20SEC("xdp")
  21int xdp_noop0(struct xdp_md *ctx)
  22{
  23        return XDP_PASS;
  24}
  25
  26char _license[] SEC("license") = "GPL";
  27