1 | #define _GNU_SOURCE |
2 | |
3 | #include <stdio.h> |
4 | #include <unistd.h> |
5 | #include <bpf/libbpf.h> |
6 | |
7 | int 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, format: "ERROR: Run with the btrfs device argument!\n" ); |
19 | return 0; |
20 | } |
21 | |
22 | snprintf(s: filename, maxlen: sizeof(filename), format: "%s.bpf.o" , argv[0]); |
23 | obj = bpf_object__open_file(filename, NULL); |
24 | if (libbpf_get_error(obj)) { |
25 | fprintf(stderr, format: "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, format: "ERROR: finding a prog in obj file failed\n" ); |
32 | goto cleanup; |
33 | } |
34 | |
35 | /* load BPF program */ |
36 | if (bpf_object__load(obj)) { |
37 | fprintf(stderr, format: "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, format: "ERROR: bpf_program__attach failed\n" ); |
44 | link = NULL; |
45 | goto cleanup; |
46 | } |
47 | |
48 | snprintf(s: command, maxlen: 256, format: "mount %s tmpmnt/" , argv[1]); |
49 | f = popen(command: command, modes: "r" ); |
50 | ret = pclose(stream: f); |
51 | |
52 | cleanup: |
53 | bpf_link__destroy(link); |
54 | bpf_object__close(obj); |
55 | return ret ? 0 : 1; |
56 | } |
57 | |