1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2018 Facebook */
3 #include <stddef.h>
4 #include <linux/bpf.h>
5 #include <linux/types.h>
6 #include <bpf/bpf_helpers.h>
7
8 struct {
9 __uint(type, BPF_MAP_TYPE_ARRAY_OF_MAPS);
10 __uint(max_entries, 1);
11 __uint(map_flags, 0);
12 __type(key, __u32);
13 __type(value, __u32);
14 } mim_array SEC(".maps");
15
16 struct {
17 __uint(type, BPF_MAP_TYPE_HASH_OF_MAPS);
18 __uint(max_entries, 1);
19 __uint(map_flags, 0);
20 __type(key, int);
21 __type(value, __u32);
22 } mim_hash SEC(".maps");
23
24 /* The following three maps are used to test
25 * perf_event_array map can be an inner
26 * map of hash/array_of_maps.
27 */
28 struct perf_event_array {
29 __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
30 __type(key, __u32);
31 __type(value, __u32);
32 } inner_map0 SEC(".maps");
33
34 struct {
35 __uint(type, BPF_MAP_TYPE_ARRAY_OF_MAPS);
36 __uint(max_entries, 1);
37 __type(key, __u32);
38 __array(values, struct perf_event_array);
39 } mim_array_pe SEC(".maps") = {
40 .values = {&inner_map0}};
41
42 struct {
43 __uint(type, BPF_MAP_TYPE_HASH_OF_MAPS);
44 __uint(max_entries, 1);
45 __type(key, __u32);
46 __array(values, struct perf_event_array);
47 } mim_hash_pe SEC(".maps") = {
48 .values = {&inner_map0}};
49
50 SEC("xdp")
51 int xdp_mimtest0(struct xdp_md *ctx)
52 {
53 int value = 123;
54 int *value_p;
55 int key = 0;
56 void *map;
57
58 map = bpf_map_lookup_elem(&mim_array, &key);
59 if (!map)
60 return XDP_DROP;
61
62 bpf_map_update_elem(map, &key, &value, 0);
63 value_p = bpf_map_lookup_elem(map, &key);
64 if (!value_p || *value_p != 123)
65 return XDP_DROP;
66
67 map = bpf_map_lookup_elem(&mim_hash, &key);
68 if (!map)
69 return XDP_DROP;
70
71 bpf_map_update_elem(map, &key, &value, 0);
72
73 return XDP_PASS;
74 }
75
76 char _license[] SEC("license") = "GPL";
77
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