tools/testing/selftests/bpf/prog_tests/fentry_test.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2019 Facebook */
   3 #include <test_progs.h>
   4
   5 void test_fentry_test(void)
   6 {
   7         struct bpf_prog_load_attr attr = {
   8                 .file = "./fentry_test.o",
   9         };
  10
  11         char prog_name[] = "fentry/bpf_fentry_testX";
  12         struct bpf_object *obj = NULL, *pkt_obj;
  13         int err, pkt_fd, kfree_skb_fd, i;
  14         struct bpf_link *link[6] = {};
  15         struct bpf_program *prog[6];
  16         __u32 duration, retval;
  17         struct bpf_map *data_map;
  18         const int zero = 0;
  19         u64 result[6];
  20
  21         err = bpf_prog_load("./test_pkt_access.o", BPF_PROG_TYPE_SCHED_CLS,
  22                             &pkt_obj, &pkt_fd);
  23         if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno))
  24                 return;
  25         err = bpf_prog_load_xattr(&attr, &obj, &kfree_skb_fd);
  26         if (CHECK(err, "prog_load fail", "err %d errno %d\n", err, errno))
  27                 goto close_prog;
  28
  29         for (i = 0; i < 6; i++) {
  30                 prog_name[sizeof(prog_name) - 2] = '1' + i;
  31                 prog[i] = bpf_object__find_program_by_title(obj, prog_name);
  32                 if (CHECK(!prog[i], "find_prog", "prog %s not found\n", prog_name))
  33                         goto close_prog;
  34                 link[i] = bpf_program__attach_trace(prog[i]);
  35                 if (CHECK(IS_ERR(link[i]), "attach_trace", "failed to link\n"))
  36                         goto close_prog;
  37         }
  38         data_map = bpf_object__find_map_by_name(obj, "fentry_t.bss");
  39         if (CHECK(!data_map, "find_data_map", "data map not found\n"))
  40                 goto close_prog;
  41
  42         err = bpf_prog_test_run(pkt_fd, 1, &pkt_v6, sizeof(pkt_v6),
  43                                 NULL, NULL, &retval, &duration);
  44         CHECK(err || retval, "ipv6",
  45               "err %d errno %d retval %d duration %d\n",
  46               err, errno, retval, duration);
  47
  48         err = bpf_map_lookup_elem(bpf_map__fd(data_map), &zero, &result);
  49         if (CHECK(err, "get_result",
  50                   "failed to get output data: %d\n", err))
  51                 goto close_prog;
  52
  53         for (i = 0; i < 6; i++)
  54                 if (CHECK(result[i] != 1, "result", "bpf_fentry_test%d failed err %ld\n",
  55                           i + 1, result[i]))
  56                         goto close_prog;
  57
  58 close_prog:
  59         for (i = 0; i < 6; i++)
  60                 if (!IS_ERR_OR_NULL(link[i]))
  61                         bpf_link__destroy(link[i]);
  62         bpf_object__close(obj);
  63         bpf_object__close(pkt_obj);
  64 }