samples/bpf/tracex1_user.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <stdio.h>
   3 #include <unistd.h>
   4 #include <bpf/libbpf.h>
   5 #include "trace_helpers.h"
   6
   7 int main(int ac, char **argv)
   8 {
   9         struct bpf_link *link = NULL;
  10         struct bpf_program *prog;
  11         struct bpf_object *obj;
  12         char filename[256];
  13         FILE *f;
  14
  15         snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
  16         obj = bpf_object__open_file(filename, NULL);
  17         if (libbpf_get_error(obj)) {
  18                 fprintf(stderr, "ERROR: opening BPF object file failed\n");
  19                 return 0;
  20         }
  21
  22         prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
  23         if (!prog) {
  24                 fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
  25                 goto cleanup;
  26         }
  27
  28         /* load BPF program */
  29         if (bpf_object__load(obj)) {
  30                 fprintf(stderr, "ERROR: loading BPF object file failed\n");
  31                 goto cleanup;
  32         }
  33
  34         link = bpf_program__attach(prog);
  35         if (libbpf_get_error(link)) {
  36                 fprintf(stderr, "ERROR: bpf_program__attach failed\n");
  37                 link = NULL;
  38                 goto cleanup;
  39         }
  40
  41         f = popen("taskset 1 ping -c5 localhost", "r");
  42         (void) f;
  43
  44         read_trace_pipe();
  45
  46 cleanup:
  47         bpf_link__destroy(link);
  48         bpf_object__close(obj);
  49         return 0;
  50 }