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 | |