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
|
// SPDX-License-Identifier: GPL-2.0-or-later
#include <kunit/test.h>
#include <linux/sw842.h>
#define SW842_GUARD_SIZE 8
#define SW842_MAX_OUTPUT 16
#define SW842_GUARD_BYTE 0x42
#define SW842_OUTPUT_POISON 0x5a
/* ZEROS, I8(0), END, CRC32. */
static const u8 sw842_index_exact_fit[] = {
0xe6, 0x40, 0x3c, 0x00, 0x00, 0x00, 0x00,
};
/* D8(eight zero bytes), I8(0), END, CRC32. */
static const u8 sw842_index_output_overflow[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x06, 0x40, 0x3c, 0x00, 0x00, 0x00, 0x00,
};
/* ZEROS, SHORT_DATA(01 02 03 04 05), END, CRC32. */
static const u8 sw842_short_data_exact_fit[] = {
0xe7, 0x68, 0x08, 0x10, 0x18, 0x20,
0x2f, 0xa9, 0x67, 0xfc, 0x07, 0xc0,
};
/* ZEROS, SHORT_DATA(five zero bytes), END, CRC32. */
static const u8 sw842_short_data_output_overflow[] = {
0xe7, 0x48, 0x07, 0x80, 0x00, 0x00, 0x00, 0x00,
};
/* ZEROS, REPEAT(one block), END, CRC32. */
static const u8 sw842_repeat_exact_history[] = {
0xe6, 0xc0, 0xf0, 0x00, 0x00, 0x00, 0x00,
};
/*
* SHORT_DATA(seven zero bytes), REPEAT(one block), END, CRC32.
* CRC32 includes SW842_GUARD_BYTE copied from before output into byte 7.
*/
static const u8 sw842_repeat_without_full_history[] = {
0xef, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xd8, 0x1e, 0x09, 0xa3, 0x1d, 0xd6,
};
static const u8 sw842_zero_output[SW842_MAX_OUTPUT];
static const u8 sw842_short_data_output[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x02, 0x03, 0x04, 0x05,
};
struct sw842_decompress_test_case {
const char *name;
const u8 *compressed;
unsigned int compressed_len;
const u8 *expected_output;
unsigned int output_capacity;
int expected_ret;
};
#define SW842_DECOMPRESS_CASE(_name, _compressed, _compressed_len, _expected, \
_capacity, _ret) \
{ \
.name = _name, \
.compressed = _compressed, \
.compressed_len = _compressed_len, \
.expected_output = _expected, \
.output_capacity = _capacity, \
.expected_ret = _ret, \
}
static const struct sw842_decompress_test_case sw842_decompress_cases[] = {
SW842_DECOMPRESS_CASE("index_exact_fit", sw842_index_exact_fit,
ARRAY_SIZE(sw842_index_exact_fit),
sw842_zero_output, 16, 0),
SW842_DECOMPRESS_CASE("index_output_overflow",
sw842_index_output_overflow,
ARRAY_SIZE(sw842_index_output_overflow),
sw842_zero_output, 8, -ENOSPC),
SW842_DECOMPRESS_CASE("short_data_exact_fit",
sw842_short_data_exact_fit,
ARRAY_SIZE(sw842_short_data_exact_fit),
sw842_short_data_output,
sizeof(sw842_short_data_output), 0),
SW842_DECOMPRESS_CASE("short_data_output_overflow",
sw842_short_data_output_overflow,
ARRAY_SIZE(sw842_short_data_output_overflow),
sw842_zero_output, 8, -ENOSPC),
SW842_DECOMPRESS_CASE("repeat_exact_history",
sw842_repeat_exact_history,
ARRAY_SIZE(sw842_repeat_exact_history),
sw842_zero_output, 16, 0),
SW842_DECOMPRESS_CASE("repeat_without_full_history",
sw842_repeat_without_full_history,
ARRAY_SIZE(sw842_repeat_without_full_history),
sw842_zero_output, 15, -EINVAL),
};
KUNIT_ARRAY_PARAM_DESC(sw842_decompress, sw842_decompress_cases, name);
static void sw842_decompress_test(struct kunit *test)
{
const struct sw842_decompress_test_case *test_case = test->param_value;
u8 storage[SW842_GUARD_SIZE + SW842_MAX_OUTPUT + SW842_GUARD_SIZE];
u8 expected_guard[SW842_GUARD_SIZE];
u8 *output = storage + SW842_GUARD_SIZE;
unsigned int output_len = test_case->output_capacity;
int ret;
KUNIT_ASSERT_LE(test, test_case->output_capacity, SW842_MAX_OUTPUT);
memset(storage, SW842_GUARD_BYTE, sizeof(storage));
memset(expected_guard, SW842_GUARD_BYTE, sizeof(expected_guard));
memset(output, SW842_OUTPUT_POISON, test_case->output_capacity);
ret = sw842_decompress(test_case->compressed,
test_case->compressed_len, output, &output_len);
KUNIT_EXPECT_EQ(test, ret, test_case->expected_ret);
/* Every successful case is an exact-fit boundary test. */
KUNIT_EXPECT_EQ(test, output_len,
test_case->expected_ret ? 0U : test_case->output_capacity);
if (!test_case->expected_ret)
KUNIT_EXPECT_MEMEQ(test, output, test_case->expected_output,
test_case->output_capacity);
KUNIT_EXPECT_MEMEQ(test, storage, expected_guard, SW842_GUARD_SIZE);
KUNIT_EXPECT_MEMEQ(test, output + test_case->output_capacity,
expected_guard, SW842_GUARD_SIZE);
}
static struct kunit_case sw842_decompress_test_cases[] = {
KUNIT_CASE_PARAM(sw842_decompress_test, sw842_decompress_gen_params),
{}
};
static struct kunit_suite sw842_decompress_test_suite = {
.name = "842-decompress",
.test_cases = sw842_decompress_test_cases,
};
kunit_test_suite(sw842_decompress_test_suite);
MODULE_DESCRIPTION("Software 842 decompressor KUnit tests");
MODULE_LICENSE("GPL");
|
