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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
   3
   4 #define _GNU_SOURCE
   5 #include <cgroup_helpers.h>
   6 #include <test_progs.h>
   7
   8 #include "cgrp_kfunc_failure.skel.h"
   9 #include "cgrp_kfunc_success.skel.h"
  10
  11 static struct cgrp_kfunc_success *open_load_cgrp_kfunc_skel(void)
  12 {
  13         struct cgrp_kfunc_success *skel;
  14         int err;
  15
  16         skel = cgrp_kfunc_success__open();
  17         if (!ASSERT_OK_PTR(skel, "skel_open"))
  18                 return NULL;
  19
  20         skel->bss->pid = getpid();
  21
  22         err = cgrp_kfunc_success__load(skel);
  23         if (!ASSERT_OK(err, "skel_load"))
  24                 goto cleanup;
  25
  26         return skel;
  27
  28 cleanup:
  29         cgrp_kfunc_success__destroy(skel);
  30         return NULL;
  31 }
  32
  33 static int mkdir_rm_test_dir(void)
  34 {
  35         int fd;
  36         const char *cgrp_path = "cgrp_kfunc";
  37
  38         fd = create_and_get_cgroup(cgrp_path);
  39         if (!ASSERT_GT(fd, 0, "mkdir_cgrp_fd"))
  40                 return -1;
  41
  42         close(fd);
  43         remove_cgroup(cgrp_path);
  44
  45         return 0;
  46 }
  47
  48 static void run_success_test(const char *prog_name)
  49 {
  50         struct cgrp_kfunc_success *skel;
  51         struct bpf_program *prog;
  52         struct bpf_link *link = NULL;
  53
  54         skel = open_load_cgrp_kfunc_skel();
  55         if (!ASSERT_OK_PTR(skel, "open_load_skel"))
  56                 return;
  57
  58         if (!ASSERT_OK(skel->bss->err, "pre_mkdir_err"))
  59                 goto cleanup;
  60
  61         prog = bpf_object__find_program_by_name(skel->obj, prog_name);
  62         if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
  63                 goto cleanup;
  64
  65         link = bpf_program__attach(prog);
  66         if (!ASSERT_OK_PTR(link, "attached_link"))
  67                 goto cleanup;
  68
  69         ASSERT_EQ(skel->bss->invocations, 0, "pre_rmdir_count");
  70         if (!ASSERT_OK(mkdir_rm_test_dir(), "cgrp_mkdir"))
  71                 goto cleanup;
  72
  73         ASSERT_EQ(skel->bss->invocations, 1, "post_rmdir_count");
  74         ASSERT_OK(skel->bss->err, "post_rmdir_err");
  75
  76 cleanup:
  77         bpf_link__destroy(link);
  78         cgrp_kfunc_success__destroy(skel);
  79 }
  80
  81 static const char * const success_tests[] = {
  82         "test_cgrp_acquire_release_argument",
  83         "test_cgrp_acquire_leave_in_map",
  84         "test_cgrp_xchg_release",
  85         "test_cgrp_get_release",
  86         "test_cgrp_get_ancestors",
  87         "test_cgrp_from_id",
  88 };
  89
  90 void test_cgrp_kfunc(void)
  91 {
  92         int i, err;
  93
  94         err = setup_cgroup_environment();
  95         if (!ASSERT_OK(err, "cgrp_env_setup"))
  96                 goto cleanup;
  97
  98         for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
  99                 if (!test__start_subtest(success_tests[i]))
 100                         continue;
 101
 102                 run_success_test(success_tests[i]);
 103         }
 104
 105         RUN_TESTS(cgrp_kfunc_failure);
 106
 107 cleanup:
 108         cleanup_cgroup_environment();
 109 }