update_map_in_htab.c

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (C) 2024. Huawei Technologies Co., Ltd */
 3#include <linux/bpf.h>
 4#include <bpf/bpf_helpers.h>
 5
 6struct inner_map_type {
 7	__uint(type, BPF_MAP_TYPE_ARRAY);
 8	__uint(key_size, 4);
 9	__uint(value_size, 4);
10	__uint(max_entries, 1);
11} inner_map SEC(".maps");
12
13struct {
14	__uint(type, BPF_MAP_TYPE_HASH_OF_MAPS);
15	__type(key, int);
16	__type(value, int);
17	__uint(max_entries, 2);
18	__array(values, struct inner_map_type);
19} outer_htab_map SEC(".maps");
20
21struct {
22	__uint(type, BPF_MAP_TYPE_HASH_OF_MAPS);
23	__uint(map_flags, BPF_F_NO_PREALLOC);
24	__type(key, int);
25	__type(value, int);
26	__uint(max_entries, 2);
27	__array(values, struct inner_map_type);
28} outer_alloc_htab_map SEC(".maps");
29
30char _license[] SEC("license") = "GPL";