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_ARRAY);
17 	__uint(max_entries, 3);
18 	__type(key, __u32);
19 	__type(value, __u64);
20 } arraymap1 SEC(".maps");
21 
22 __u32 key_sum = 0;
23 __u64 val_sum = 0;
24 
25 SEC("iter/bpf_map_elem")
dump_bpf_array_map(struct bpf_iter__bpf_map_elem * ctx)26 int dump_bpf_array_map(struct bpf_iter__bpf_map_elem *ctx)
27 {
28 	__u32 *key = ctx->key;
29 	__u64 *val = ctx->value;
30 
31 	if (key == (void *)0 || val == (void *)0)
32 		return 0;
33 
34 	bpf_seq_write(ctx->meta->seq, key, sizeof(__u32));
35 	bpf_seq_write(ctx->meta->seq, val, sizeof(__u64));
36 	key_sum += *key;
37 	val_sum += *val;
38 	*val = *key;
39 	return 0;
40 }
41