tools/testing/selftests/bpf/progs/sample_map_ret0.c

   1 /* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
   2 #include <linux/bpf.h>
   3 #include "bpf_helpers.h"
   4
   5 struct bpf_map_def SEC("maps") htab = {
   6         .type = BPF_MAP_TYPE_HASH,
   7         .key_size = sizeof(__u32),
   8         .value_size = sizeof(long),
   9         .max_entries = 2,
  10 };
  11
  12 struct bpf_map_def SEC("maps") array = {
  13         .type = BPF_MAP_TYPE_ARRAY,
  14         .key_size = sizeof(__u32),
  15         .value_size = sizeof(long),
  16         .max_entries = 2,
  17 };
  18
  19 /* Sample program which should always load for testing control paths. */
  20 SEC(".text") int func()
  21 {
  22         __u64 key64 = 0;
  23         __u32 key = 0;
  24         long *value;
  25
  26         value = bpf_map_lookup_elem(&htab, &key);
  27         if (!value)
  28                 return 1;
  29         value = bpf_map_lookup_elem(&array, &key64);
  30         if (!value)
  31                 return 1;
  32
  33         return 0;
  34 }