1#define _GNU_SOURCE
2
3#include <stdio.h>
4#include <unistd.h>
5#include <bpf/libbpf.h>
6
7int main(int argc, char **argv)
8{
9 struct bpf_link *link = NULL;
10 struct bpf_program *prog;
11 struct bpf_object *obj;
12 char filename[256];
13 char command[256];
14 int ret = 0;
15 FILE *f;
16
17 if (!argv[1]) {
18 fprintf(stderr, "ERROR: Run with the btrfs device argument!\n");
19 return 0;
20 }
21
22 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
23 obj = bpf_object__open_file(filename, NULL);
24 if (libbpf_get_error(obj)) {
25 fprintf(stderr, "ERROR: opening BPF object file failed\n");
26 return 0;
27 }
28
29 prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
30 if (!prog) {
31 fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
32 goto cleanup;
33 }
34
35
36 if (bpf_object__load(obj)) {
37 fprintf(stderr, "ERROR: loading BPF object file failed\n");
38 goto cleanup;
39 }
40
41 link = bpf_program__attach(prog);
42 if (libbpf_get_error(link)) {
43 fprintf(stderr, "ERROR: bpf_program__attach failed\n");
44 link = NULL;
45 goto cleanup;
46 }
47
48 snprintf(command, 256, "mount %s tmpmnt/", argv[1]);
49 f = popen(command, "r");
50 ret = pclose(f);
51
52cleanup:
53 bpf_link__destroy(link);
54 bpf_object__close(obj);
55 return ret ? 0 : 1;
56}
57
