1// SPDX-License-Identifier: GPL-2.0
  2/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
  3#include <test_progs.h>
  4#include <time.h>
  5
  6#include "struct_ops_module.skel.h"
  7
  8static void check_map_info(struct bpf_map_info *info)
  9{
 10	struct bpf_btf_info btf_info;
 11	char btf_name[256];
 12	u32 btf_info_len = sizeof(btf_info);
 13	int err, fd;
 14
 15	fd = bpf_btf_get_fd_by_id(info->btf_vmlinux_id);
 16	if (!ASSERT_GE(fd, 0, "get_value_type_btf_obj_fd"))
 17		return;
 18
 19	memset(&btf_info, 0, sizeof(btf_info));
 20	btf_info.name = ptr_to_u64(btf_name);
 21	btf_info.name_len = sizeof(btf_name);
 22	err = bpf_btf_get_info_by_fd(fd, &btf_info, &btf_info_len);
 23	if (!ASSERT_OK(err, "get_value_type_btf_obj_info"))
 24		goto cleanup;
 25
 26	if (!ASSERT_EQ(strcmp(btf_name, "bpf_testmod"), 0, "get_value_type_btf_obj_name"))
 27		goto cleanup;
 28
 29cleanup:
 30	close(fd);
 31}
 32
 33static int attach_ops_and_check(struct struct_ops_module *skel,
 34				struct bpf_map *map,
 35				int expected_test_2_result)
 36{
 37	struct bpf_link *link;
 38
 39	link = bpf_map__attach_struct_ops(map);
 40	ASSERT_OK_PTR(link, "attach_test_mod_1");
 41	if (!link)
 42		return -1;
 43
 44	/* test_{1,2}() would be called from bpf_dummy_reg() in bpf_testmod.c */
 45	ASSERT_EQ(skel->bss->test_1_result, 0xdeadbeef, "test_1_result");
 46	ASSERT_EQ(skel->bss->test_2_result, expected_test_2_result, "test_2_result");
 47
 48	bpf_link__destroy(link);
 49	return 0;
 50}
 51
 52static void test_struct_ops_load(void)
 53{
 54	struct struct_ops_module *skel;
 55	struct bpf_map_info info = {};
 56	int err;
 57	u32 len;
 58
 59	skel = struct_ops_module__open();
 60	if (!ASSERT_OK_PTR(skel, "struct_ops_module_open"))
 61		return;
 62
 63	skel->struct_ops.testmod_1->data = 13;
 64	skel->struct_ops.testmod_1->test_2 = skel->progs.test_3;
 65	/* Since test_2() is not being used, it should be disabled from
 66	 * auto-loading, or it will fail to load.
 67	 */
 68	bpf_program__set_autoload(skel->progs.test_2, false);
 69
 70	err = struct_ops_module__load(skel);
 71	if (!ASSERT_OK(err, "struct_ops_module_load"))
 72		goto cleanup;
 73
 74	len = sizeof(info);
 75	err = bpf_map_get_info_by_fd(bpf_map__fd(skel->maps.testmod_1), &info,
 76				     &len);
 77	if (!ASSERT_OK(err, "bpf_map_get_info_by_fd"))
 78		goto cleanup;
 79
 80	check_map_info(&info);
 81	/* test_3() will be called from bpf_dummy_reg() in bpf_testmod.c
 82	 *
 83	 * In bpf_testmod.c it will pass 4 and 13 (the value of data) to
 84	 * .test_2.  So, the value of test_2_result should be 20 (4 + 13 +
 85	 * 3).
 86	 */
 87	if (!attach_ops_and_check(skel, skel->maps.testmod_1, 20))
 88		goto cleanup;
 89	if (!attach_ops_and_check(skel, skel->maps.testmod_2, 12))
 90		goto cleanup;
 91
 92cleanup:
 93	struct_ops_module__destroy(skel);
 94}
 95
 96void serial_test_struct_ops_module(void)
 97{
 98	if (test__start_subtest("test_struct_ops_load"))
 99		test_struct_ops_load();
100}
101