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
 11static 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
 28cleanup:
 29	cgrp_kfunc_success__destroy(skel);
 30	return NULL;
 31}
 32
 33static 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
 48static 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
 76cleanup:
 77	bpf_link__destroy(link);
 78	cgrp_kfunc_success__destroy(skel);
 79}
 80
 81static 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
 90void 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
107cleanup:
108	cleanup_cgroup_environment();
109}