1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Copyright (c) 2020 Facebook */ |
3 | #include "bpf_iter.h" |
4 | #include <bpf/bpf_helpers.h> |
5 | #include <bpf/bpf_tracing.h> |
6 | |
7 | char _license[] SEC("license" ) = "GPL" ; |
8 | |
9 | struct key_t { |
10 | int a; |
11 | int b; |
12 | int c; |
13 | }; |
14 | |
15 | struct { |
16 | __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); |
17 | __uint(max_entries, 3); |
18 | __type(key, __u32); |
19 | __type(value, __u32); |
20 | } arraymap1 SEC(".maps" ); |
21 | |
22 | /* will set before prog run */ |
23 | volatile const __u32 num_cpus = 0; |
24 | |
25 | __u32 key_sum = 0, val_sum = 0; |
26 | |
27 | SEC("iter/bpf_map_elem" ) |
28 | int dump_bpf_percpu_array_map(struct bpf_iter__bpf_map_elem *ctx) |
29 | { |
30 | __u32 *key = ctx->key; |
31 | void *pptr = ctx->value; |
32 | __u32 step; |
33 | int i; |
34 | |
35 | if (key == (void *)0 || pptr == (void *)0) |
36 | return 0; |
37 | |
38 | key_sum += *key; |
39 | |
40 | step = 8; |
41 | for (i = 0; i < num_cpus; i++) { |
42 | val_sum += *(__u32 *)pptr; |
43 | pptr += step; |
44 | } |
45 | return 0; |
46 | } |
47 | |