LXR linux/tools/testing/selftests/bpf/prog_tests/load_bytes

   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
  10void 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
  63close_bpf_object:
  64        bpf_object__close(obj);
  65
  66close_server_fd:
  67        close(server_fd);
  68
  69close_cgroup_fd:
  70        close(cgroup_fd);
  71}
  72