summaryrefslogtreecommitdiff
path: root/fs/fat/fat_test.c
blob: 2dab4ca1d0d80efc6118cbb18ddf6dc428f69470 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
// SPDX-License-Identifier: GPL-2.0
/*
 * KUnit tests for FAT filesystems.
 *
 * Copyright (C) 2020 Google LLC.
 * Author: David Gow <davidgow@google.com>
 */

#include <kunit/test.h>

#include "fat.h"

static void fat_checksum_test(struct kunit *test)
{
	/* With no extension. */
	KUNIT_EXPECT_EQ(test, fat_checksum("VMLINUX    "), (u8)44);
	/* With 3-letter extension. */
	KUNIT_EXPECT_EQ(test, fat_checksum("README  TXT"), (u8)115);
	/* With short (1-letter) extension. */
	KUNIT_EXPECT_EQ(test, fat_checksum("ABCDEFGHA  "), (u8)98);
}

struct fat_timestamp_testcase {
	const char *name;
	struct timespec64 ts;
	__le16 time;
	__le16 date;
	u8 cs;
	int time_offset;
};

static struct fat_timestamp_testcase time_test_cases[] = {
	{
		.name = "Earliest possible UTC (1980-01-01 00:00:00)",
		.ts = {.tv_sec = 315532800LL, .tv_nsec = 0L},
		.time = cpu_to_le16(0),
		.date = cpu_to_le16(33),
		.cs = 0,
		.time_offset = 0,
	},
	{
		.name = "Latest possible UTC (2107-12-31 23:59:58)",
		.ts = {.tv_sec = 4354819198LL, .tv_nsec = 0L},
		.time = cpu_to_le16(49021),
		.date = cpu_to_le16(65439),
		.cs = 0,
		.time_offset = 0,
	},
	{
		.name = "Earliest possible (UTC-11) (== 1979-12-31 13:00:00 UTC)",
		.ts = {.tv_sec = 315493200LL, .tv_nsec = 0L},
		.time = cpu_to_le16(0),
		.date = cpu_to_le16(33),
		.cs = 0,
		.time_offset = 11 * 60,
	},
	{
		.name = "Latest possible (UTC+11) (== 2108-01-01 10:59:58 UTC)",
		.ts = {.tv_sec = 4354858798LL, .tv_nsec = 0L},
		.time = cpu_to_le16(49021),
		.date = cpu_to_le16(65439),
		.cs = 0,
		.time_offset = -11 * 60,
	},
	{
		.name = "Leap Day / Year (1996-02-29 00:00:00)",
		.ts = {.tv_sec = 825552000LL, .tv_nsec = 0L},
		.time = cpu_to_le16(0),
		.date = cpu_to_le16(8285),
		.cs = 0,
		.time_offset = 0,
	},
	{
		.name = "Year 2000 is leap year (2000-02-29 00:00:00)",
		.ts = {.tv_sec = 951782400LL, .tv_nsec = 0L},
		.time = cpu_to_le16(0),
		.date = cpu_to_le16(10333),
		.cs = 0,
		.time_offset = 0,
	},
	{
		.name = "Year 2100 not leap year (2100-03-01 00:00:00)",
		.ts = {.tv_sec = 4107542400LL, .tv_nsec = 0L},
		.time = cpu_to_le16(0),
		.date = cpu_to_le16(61537),
		.cs = 0,
		.time_offset = 0,
	},
	{
		.name = "Leap year + timezone UTC+1 (== 2004-02-29 00:30:00 UTC)",
		.ts = {.tv_sec = 1078014600LL, .tv_nsec = 0L},
		.time = cpu_to_le16(48064),
		.date = cpu_to_le16(12380),
		.cs = 0,
		.time_offset = -60,
	},
	{
		.name = "Leap year + timezone UTC-1 (== 2004-02-29 23:30:00 UTC)",
		.ts = {.tv_sec = 1078097400LL, .tv_nsec = 0L},
		.time = cpu_to_le16(960),
		.date = cpu_to_le16(12385),
		.cs = 0,
		.time_offset = 60,
	},
	{
		.name = "VFAT odd-second resolution (1999-12-31 23:59:59)",
		.ts = {.tv_sec = 946684799LL, .tv_nsec = 0L},
		.time = cpu_to_le16(49021),
		.date = cpu_to_le16(10143),
		.cs = 100,
		.time_offset = 0,
	},
	{
		.name = "VFAT 10ms resolution (1980-01-01 00:00:00:0010)",
		.ts = {.tv_sec = 315532800LL, .tv_nsec = 10000000L},
		.time = cpu_to_le16(0),
		.date = cpu_to_le16(33),
		.cs = 1,
		.time_offset = 0,
	},
};

static void time_testcase_desc(struct fat_timestamp_testcase *t,
			       char *desc)
{
	strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
}

KUNIT_ARRAY_PARAM(fat_time, time_test_cases, time_testcase_desc);

static void fat_time_fat2unix_test(struct kunit *test)
{
	static struct msdos_sb_info fake_sb;
	struct timespec64 ts;
	struct fat_timestamp_testcase *testcase =
		(struct fat_timestamp_testcase *)test->param_value;

	fake_sb.options.tz_set = 1;
	fake_sb.options.time_offset = testcase->time_offset;

	fat_time_fat2unix(&fake_sb, &ts,
			  testcase->time,
			  testcase->date,
			  testcase->cs);
	KUNIT_EXPECT_EQ_MSG(test,
			    testcase->ts.tv_sec,
			    ts.tv_sec,
			    "Timestamp mismatch (seconds)\n");
	KUNIT_EXPECT_EQ_MSG(test,
			    testcase->ts.tv_nsec,
			    ts.tv_nsec,
			    "Timestamp mismatch (nanoseconds)\n");
}

static void fat_time_unix2fat_test(struct kunit *test)
{
	static struct msdos_sb_info fake_sb;
	__le16 date, time;
	u8 cs;
	struct fat_timestamp_testcase *testcase =
		(struct fat_timestamp_testcase *)test->param_value;

	fake_sb.options.tz_set = 1;
	fake_sb.options.time_offset = testcase->time_offset;

	fat_time_unix2fat(&fake_sb, &testcase->ts,
			  &time, &date, &cs);
	KUNIT_EXPECT_EQ_MSG(test,
			    le16_to_cpu(testcase->time),
			    le16_to_cpu(time),
			    "Time mismatch\n");
	KUNIT_EXPECT_EQ_MSG(test,
			    le16_to_cpu(testcase->date),
			    le16_to_cpu(date),
			    "Date mismatch\n");
	KUNIT_EXPECT_EQ_MSG(test,
			    testcase->cs,
			    cs,
			    "Centisecond mismatch\n");
}

static struct kunit_case fat_test_cases[] = {
	KUNIT_CASE(fat_checksum_test),
	KUNIT_CASE_PARAM(fat_time_fat2unix_test, fat_time_gen_params),
	KUNIT_CASE_PARAM(fat_time_unix2fat_test, fat_time_gen_params),
	{},
};

static struct kunit_suite fat_test_suite = {
	.name = "fat_test",
	.test_cases = fat_test_cases,
};

kunit_test_suites(&fat_test_suite);

MODULE_LICENSE("GPL v2");