Philo Lu | fecb159 | 2024-04-05 10:55:36 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | #include "vmlinux.h" |
| 3 | #include <bpf/bpf_helpers.h> |
| 4 | |
| 5 | char _license[] SEC("license") = "GPL"; |
| 6 | |
| 7 | struct { |
| 8 | __uint(type, BPF_MAP_TYPE_ARRAY); |
| 9 | __uint(max_entries, 3); |
| 10 | __type(key, __u32); |
| 11 | __type(value, __u64); |
| 12 | } arraymap SEC(".maps"); |
| 13 | |
| 14 | struct { |
| 15 | __uint(type, BPF_MAP_TYPE_HASH); |
| 16 | __uint(max_entries, 5); |
| 17 | __type(key, __u32); |
| 18 | __type(value, __u64); |
| 19 | } hashmap SEC(".maps"); |
| 20 | |
| 21 | struct callback_ctx { |
| 22 | int output; |
| 23 | }; |
| 24 | |
| 25 | u32 data_output = 0; |
| 26 | int use_array = 0; |
| 27 | |
| 28 | static __u64 |
| 29 | check_map_elem(struct bpf_map *map, __u32 *key, __u64 *val, |
| 30 | struct callback_ctx *data) |
| 31 | { |
| 32 | data->output += *val; |
| 33 | return 0; |
| 34 | } |
| 35 | |
| 36 | SEC("tc") |
| 37 | int test_pkt_access(struct __sk_buff *skb) |
| 38 | { |
| 39 | struct callback_ctx data; |
| 40 | |
| 41 | data.output = 0; |
| 42 | if (use_array) |
| 43 | bpf_for_each_map_elem(&arraymap, check_map_elem, &data, 0); |
| 44 | else |
| 45 | bpf_for_each_map_elem(&hashmap, check_map_elem, &data, 0); |
| 46 | data_output = data.output; |
| 47 | |
| 48 | return 0; |
| 49 | } |