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1// SPDX-License-Identifier: GPL-2.0-only
2//
3// uapi_test.c - An application of Kunit to check layout of structures exposed to user space for
4// FireWire subsystem.
5//
6// Copyright (c) 2023 Takashi Sakamoto
7
8#include <kunit/test.h>
9#include <linux/firewire-cdev.h>
10
11// Known issue added at v2.6.27 kernel.
12static void structure_layout_event_response(struct kunit *test)
13{
14#if defined(CONFIG_X86_32)
15 // 4 bytes alignment for aggregate type including 8 bytes storage types.
16 KUNIT_EXPECT_EQ(test, 20, sizeof(struct fw_cdev_event_response));
17#else
18 // 8 bytes alignment for aggregate type including 8 bytes storage types.
19 KUNIT_EXPECT_EQ(test, 24, sizeof(struct fw_cdev_event_response));
20#endif
21
22 KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_response, closure));
23 KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_response, type));
24 KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_response, rcode));
25 KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_response, length));
26 KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_response, data));
27}
28
29// Added at v6.5.
30static void structure_layout_event_request3(struct kunit *test)
31{
32 KUNIT_EXPECT_EQ(test, 56, sizeof(struct fw_cdev_event_request3));
33
34 KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_request3, closure));
35 KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_request3, type));
36 KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_request3, tcode));
37 KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_request3, offset));
38 KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_request3, source_node_id));
39 KUNIT_EXPECT_EQ(test, 28, offsetof(struct fw_cdev_event_request3, destination_node_id));
40 KUNIT_EXPECT_EQ(test, 32, offsetof(struct fw_cdev_event_request3, card));
41 KUNIT_EXPECT_EQ(test, 36, offsetof(struct fw_cdev_event_request3, generation));
42 KUNIT_EXPECT_EQ(test, 40, offsetof(struct fw_cdev_event_request3, handle));
43 KUNIT_EXPECT_EQ(test, 44, offsetof(struct fw_cdev_event_request3, length));
44 KUNIT_EXPECT_EQ(test, 48, offsetof(struct fw_cdev_event_request3, tstamp));
45 KUNIT_EXPECT_EQ(test, 56, offsetof(struct fw_cdev_event_request3, data));
46}
47
48// Added at v6.5.
49static void structure_layout_event_response2(struct kunit *test)
50{
51 KUNIT_EXPECT_EQ(test, 32, sizeof(struct fw_cdev_event_response2));
52
53 KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_response2, closure));
54 KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_response2, type));
55 KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_response2, rcode));
56 KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_response2, length));
57 KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_response2, request_tstamp));
58 KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_response2, response_tstamp));
59 KUNIT_EXPECT_EQ(test, 32, offsetof(struct fw_cdev_event_response2, data));
60}
61
62// Added at v6.5.
63static void structure_layout_event_phy_packet2(struct kunit *test)
64{
65 KUNIT_EXPECT_EQ(test, 24, sizeof(struct fw_cdev_event_phy_packet2));
66
67 KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_phy_packet2, closure));
68 KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_phy_packet2, type));
69 KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_phy_packet2, rcode));
70 KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_phy_packet2, length));
71 KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_phy_packet2, tstamp));
72 KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_phy_packet2, data));
73}
74
75static struct kunit_case structure_layout_test_cases[] = {
76 KUNIT_CASE(structure_layout_event_response),
77 KUNIT_CASE(structure_layout_event_request3),
78 KUNIT_CASE(structure_layout_event_response2),
79 KUNIT_CASE(structure_layout_event_phy_packet2),
80 {}
81};
82
83static struct kunit_suite structure_layout_test_suite = {
84 .name = "firewire-uapi-structure-layout",
85 .test_cases = structure_layout_test_cases,
86};
87kunit_test_suite(structure_layout_test_suite);
88
89MODULE_DESCRIPTION("FireWire UAPI unit test suite");
90MODULE_LICENSE("GPL");