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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 /*
   4  * Copyright 2020 Google LLC.
   5  */
   6
   7 #include <test_progs.h>
   8 #include <network_helpers.h>
   9
  10 void test_load_bytes_relative(void)
  11 {
  12         int server_fd, cgroup_fd, prog_fd, map_fd, client_fd;
  13         int err;
  14         struct bpf_object *obj;
  15         struct bpf_program *prog;
  16         struct bpf_map *test_result;
  17         __u32 duration = 0;
  18
  19         __u32 map_key = 0;
  20         __u32 map_value = 0;
  21
  22         cgroup_fd = test__join_cgroup("/load_bytes_relative");
  23         if (CHECK_FAIL(cgroup_fd < 0))
  24                 return;
  25
  26         server_fd = start_server(AF_INET, SOCK_STREAM, NULL, 0, 0);
  27         if (CHECK_FAIL(server_fd < 0))
  28                 goto close_cgroup_fd;
  29
  30         err = bpf_prog_load("./load_bytes_relative.o", BPF_PROG_TYPE_CGROUP_SKB,
  31                             &obj, &prog_fd);
  32         if (CHECK_FAIL(err))
  33                 goto close_server_fd;
  34
  35         test_result = bpf_object__find_map_by_name(obj, "test_result");
  36         if (CHECK_FAIL(!test_result))
  37                 goto close_bpf_object;
  38
  39         map_fd = bpf_map__fd(test_result);
  40         if (map_fd < 0)
  41                 goto close_bpf_object;
  42
  43         prog = bpf_object__find_program_by_name(obj, "load_bytes_relative");
  44         if (CHECK_FAIL(!prog))
  45                 goto close_bpf_object;
  46
  47         err = bpf_prog_attach(prog_fd, cgroup_fd, BPF_CGROUP_INET_EGRESS,
  48                               BPF_F_ALLOW_MULTI);
  49         if (CHECK_FAIL(err))
  50                 goto close_bpf_object;
  51
  52         client_fd = connect_to_fd(server_fd, 0);
  53         if (CHECK_FAIL(client_fd < 0))
  54                 goto close_bpf_object;
  55         close(client_fd);
  56
  57         err = bpf_map_lookup_elem(map_fd, &map_key, &map_value);
  58         if (CHECK_FAIL(err))
  59                 goto close_bpf_object;
  60
  61         CHECK(map_value != 1, "bpf", "bpf program returned failure");
  62
  63 close_bpf_object:
  64         bpf_object__close(obj);
  65
  66 close_server_fd:
  67         close(server_fd);
  68
  69 close_cgroup_fd:
  70         close(cgroup_fd);
  71 }