1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2021 Facebook */
3
4#include "vmlinux.h"
5#include <bpf/bpf_helpers.h>
6#include <bpf/bpf_tracing.h>
7
8char _license[] SEC("license") = "GPL";
9
10struct {
11	__uint(type, BPF_MAP_TYPE_HASH);
12	__uint(max_entries, 1);
13	__type(key, int);
14	__type(value, long);
15} hash1 SEC(".maps");
16
17struct {
18	__uint(type, BPF_MAP_TYPE_HASH);
19	__uint(max_entries, 1);
20	__type(key, int);
21	__type(value, long);
22} hash2 SEC(".maps");
23
24int pass1 = 0;
25int pass2 = 0;
26
27SEC("fentry/htab_map_delete_elem")
28int BPF_PROG(on_delete, struct bpf_map *map)
29{
30	int key = 0;
31
32	if (map == (void *)&hash1) {
33		pass1++;
34		return 0;
35	}
36	if (map == (void *)&hash2) {
37		pass2++;
38		bpf_map_delete_elem(&hash2, &key);
39		return 0;
40	}
41
42	return 0;
43}
44