1*4882a593Smuzhiyun #define _GNU_SOURCE
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun #include <stdio.h>
4*4882a593Smuzhiyun #include <unistd.h>
5*4882a593Smuzhiyun #include <bpf/libbpf.h>
6*4882a593Smuzhiyun
main(int argc,char ** argv)7*4882a593Smuzhiyun int main(int argc, char **argv)
8*4882a593Smuzhiyun {
9*4882a593Smuzhiyun struct bpf_link *link = NULL;
10*4882a593Smuzhiyun struct bpf_program *prog;
11*4882a593Smuzhiyun struct bpf_object *obj;
12*4882a593Smuzhiyun char filename[256];
13*4882a593Smuzhiyun char command[256];
14*4882a593Smuzhiyun int ret = 0;
15*4882a593Smuzhiyun FILE *f;
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun if (!argv[1]) {
18*4882a593Smuzhiyun fprintf(stderr, "ERROR: Run with the btrfs device argument!\n");
19*4882a593Smuzhiyun return 0;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
23*4882a593Smuzhiyun obj = bpf_object__open_file(filename, NULL);
24*4882a593Smuzhiyun if (libbpf_get_error(obj)) {
25*4882a593Smuzhiyun fprintf(stderr, "ERROR: opening BPF object file failed\n");
26*4882a593Smuzhiyun return 0;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
30*4882a593Smuzhiyun if (!prog) {
31*4882a593Smuzhiyun fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
32*4882a593Smuzhiyun goto cleanup;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun /* load BPF program */
36*4882a593Smuzhiyun if (bpf_object__load(obj)) {
37*4882a593Smuzhiyun fprintf(stderr, "ERROR: loading BPF object file failed\n");
38*4882a593Smuzhiyun goto cleanup;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun link = bpf_program__attach(prog);
42*4882a593Smuzhiyun if (libbpf_get_error(link)) {
43*4882a593Smuzhiyun fprintf(stderr, "ERROR: bpf_program__attach failed\n");
44*4882a593Smuzhiyun link = NULL;
45*4882a593Smuzhiyun goto cleanup;
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun snprintf(command, 256, "mount %s tmpmnt/", argv[1]);
49*4882a593Smuzhiyun f = popen(command, "r");
50*4882a593Smuzhiyun ret = pclose(f);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun cleanup:
53*4882a593Smuzhiyun bpf_link__destroy(link);
54*4882a593Smuzhiyun bpf_object__close(obj);
55*4882a593Smuzhiyun return ret ? 0 : 1;
56*4882a593Smuzhiyun }
57