35 lines · c
1/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */2#include <linux/bpf.h>3#include <bpf/bpf_helpers.h>4 5struct {6 __uint(type, BPF_MAP_TYPE_HASH);7 __type(key, __u32);8 __type(value, long);9 __uint(max_entries, 2);10} htab SEC(".maps");11 12struct {13 __uint(type, BPF_MAP_TYPE_ARRAY);14 __type(key, __u32);15 __type(value, long);16 __uint(max_entries, 2);17} array SEC(".maps");18 19/* Sample program which should always load for testing control paths. */20SEC("xdp") 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}35