1 // SPDX-License-Identifier: GPL-2.0
2 
3 #include "vmlinux.h"
4 #include <bpf/bpf_helpers.h>
5 #include <bpf/bpf_tracing.h>
6 
7 struct {
8 	__uint(type, BPF_MAP_TYPE_ARRAY);
9 	__uint(max_entries, 8);
10 	__type(key, __u32);
11 	__type(value, __u64);
12 } test_array SEC(".maps");
13 
14 unsigned int triggered;
15 
16 static __u64 test_cb(struct bpf_map *map, __u32 *key, __u64 *val, void *data)
17 {
18 	return 1;
19 }
20 
21 SEC("fexit/bpf_testmod_return_ptr")
22 int BPF_PROG(handle_fexit_ret_subprogs, int arg, struct file *ret)
23 {
24 	*(volatile long *)ret;
25 	*(volatile int *)&ret->f_mode;
26 	bpf_for_each_map_elem(&test_array, test_cb, NULL, 0);
27 	triggered++;
28 	return 0;
29 }
30 
31 SEC("fexit/bpf_testmod_return_ptr")
32 int BPF_PROG(handle_fexit_ret_subprogs2, int arg, struct file *ret)
33 {
34 	*(volatile long *)ret;
35 	*(volatile int *)&ret->f_mode;
36 	bpf_for_each_map_elem(&test_array, test_cb, NULL, 0);
37 	triggered++;
38 	return 0;
39 }
40 
41 SEC("fexit/bpf_testmod_return_ptr")
42 int BPF_PROG(handle_fexit_ret_subprogs3, int arg, struct file *ret)
43 {
44 	*(volatile long *)ret;
45 	*(volatile int *)&ret->f_mode;
46 	bpf_for_each_map_elem(&test_array, test_cb, NULL, 0);
47 	triggered++;
48 	return 0;
49 }
50 
51 char _license[] SEC("license") = "GPL";
52