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Commit | Line | Data |
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64d1d77a AS |
1 | /* |
2 | * Test cases for lib/hexdump.c module. | |
3 | */ | |
4 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
5 | ||
6 | #include <linux/init.h> | |
7 | #include <linux/kernel.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/random.h> | |
10 | #include <linux/string.h> | |
11 | ||
12 | static const unsigned char data_b[] = { | |
13 | '\xbe', '\x32', '\xdb', '\x7b', '\x0a', '\x18', '\x93', '\xb2', /* 00 - 07 */ | |
14 | '\x70', '\xba', '\xc4', '\x24', '\x7d', '\x83', '\x34', '\x9b', /* 08 - 0f */ | |
15 | '\xa6', '\x9c', '\x31', '\xad', '\x9c', '\x0f', '\xac', '\xe9', /* 10 - 17 */ | |
16 | '\x4c', '\xd1', '\x19', '\x99', '\x43', '\xb1', '\xaf', '\x0c', /* 18 - 1f */ | |
17 | }; | |
18 | ||
19 | static const unsigned char data_a[] = ".2.{....p..$}.4...1.....L...C..."; | |
20 | ||
c79574ab | 21 | static const char * const test_data_1_le[] __initconst = { |
64d1d77a AS |
22 | "be", "32", "db", "7b", "0a", "18", "93", "b2", |
23 | "70", "ba", "c4", "24", "7d", "83", "34", "9b", | |
24 | "a6", "9c", "31", "ad", "9c", "0f", "ac", "e9", | |
25 | "4c", "d1", "19", "99", "43", "b1", "af", "0c", | |
26 | }; | |
27 | ||
79e23d57 | 28 | static const char * const test_data_2_le[] __initconst = { |
64d1d77a AS |
29 | "32be", "7bdb", "180a", "b293", |
30 | "ba70", "24c4", "837d", "9b34", | |
31 | "9ca6", "ad31", "0f9c", "e9ac", | |
32 | "d14c", "9919", "b143", "0caf", | |
33 | }; | |
34 | ||
79e23d57 | 35 | static const char * const test_data_4_le[] __initconst = { |
64d1d77a AS |
36 | "7bdb32be", "b293180a", "24c4ba70", "9b34837d", |
37 | "ad319ca6", "e9ac0f9c", "9919d14c", "0cafb143", | |
38 | }; | |
39 | ||
79e23d57 | 40 | static const char * const test_data_8_le[] __initconst = { |
64d1d77a AS |
41 | "b293180a7bdb32be", "9b34837d24c4ba70", |
42 | "e9ac0f9cad319ca6", "0cafb1439919d14c", | |
43 | }; | |
44 | ||
87977ca6 AS |
45 | static void __init test_hexdump_prepare_test(size_t len, int rowsize, |
46 | int groupsize, char *test, | |
47 | size_t testlen, bool ascii) | |
64d1d77a | 48 | { |
64d1d77a | 49 | char *p; |
17974c05 | 50 | const char * const *result; |
64d1d77a AS |
51 | size_t l = len; |
52 | int gs = groupsize, rs = rowsize; | |
53 | unsigned int i; | |
54 | ||
64d1d77a AS |
55 | if (rs != 16 && rs != 32) |
56 | rs = 16; | |
57 | ||
58 | if (l > rs) | |
59 | l = rs; | |
60 | ||
61 | if (!is_power_of_2(gs) || gs > 8 || (len % gs != 0)) | |
62 | gs = 1; | |
63 | ||
64 | if (gs == 8) | |
65 | result = test_data_8_le; | |
66 | else if (gs == 4) | |
67 | result = test_data_4_le; | |
68 | else if (gs == 2) | |
69 | result = test_data_2_le; | |
70 | else | |
71 | result = test_data_1_le; | |
72 | ||
87977ca6 | 73 | memset(test, ' ', testlen); |
64d1d77a AS |
74 | |
75 | /* hex dump */ | |
76 | p = test; | |
77 | for (i = 0; i < l / gs; i++) { | |
78 | const char *q = *result++; | |
79 | size_t amount = strlen(q); | |
80 | ||
81 | strncpy(p, q, amount); | |
82 | p += amount + 1; | |
83 | } | |
84 | if (i) | |
85 | p--; | |
86 | ||
87 | /* ASCII part */ | |
88 | if (ascii) { | |
89 | p = test + rs * 2 + rs / gs + 1; | |
90 | strncpy(p, data_a, l); | |
91 | p += l; | |
92 | } | |
93 | ||
94 | *p = '\0'; | |
87977ca6 AS |
95 | } |
96 | ||
97 | #define TEST_HEXDUMP_BUF_SIZE (32 * 3 + 2 + 32 + 1) | |
98 | ||
99 | static void __init test_hexdump(size_t len, int rowsize, int groupsize, | |
100 | bool ascii) | |
101 | { | |
102 | char test[TEST_HEXDUMP_BUF_SIZE]; | |
103 | char real[TEST_HEXDUMP_BUF_SIZE]; | |
104 | ||
105 | hex_dump_to_buffer(data_b, len, rowsize, groupsize, real, sizeof(real), | |
106 | ascii); | |
107 | ||
108 | test_hexdump_prepare_test(len, rowsize, groupsize, test, sizeof(test), | |
109 | ascii); | |
64d1d77a AS |
110 | |
111 | if (strcmp(test, real)) { | |
112 | pr_err("Len: %zu row: %d group: %d\n", len, rowsize, groupsize); | |
113 | pr_err("Result: '%s'\n", real); | |
114 | pr_err("Expect: '%s'\n", test); | |
115 | } | |
116 | } | |
117 | ||
118 | static void __init test_hexdump_set(int rowsize, bool ascii) | |
119 | { | |
120 | size_t d = min_t(size_t, sizeof(data_b), rowsize); | |
121 | size_t len = get_random_int() % d + 1; | |
122 | ||
123 | test_hexdump(len, rowsize, 4, ascii); | |
124 | test_hexdump(len, rowsize, 2, ascii); | |
125 | test_hexdump(len, rowsize, 8, ascii); | |
126 | test_hexdump(len, rowsize, 1, ascii); | |
127 | } | |
128 | ||
114fc1af AS |
129 | static void __init test_hexdump_overflow(bool ascii) |
130 | { | |
131 | char buf[56]; | |
132 | const char *t = test_data_1_le[0]; | |
133 | size_t l = get_random_int() % sizeof(buf); | |
134 | bool a; | |
135 | int e, r; | |
136 | ||
137 | memset(buf, ' ', sizeof(buf)); | |
138 | ||
139 | r = hex_dump_to_buffer(data_b, 1, 16, 1, buf, l, ascii); | |
140 | ||
141 | if (ascii) | |
142 | e = 50; | |
143 | else | |
144 | e = 2; | |
145 | buf[e + 2] = '\0'; | |
146 | ||
147 | if (!l) { | |
148 | a = r == e && buf[0] == ' '; | |
149 | } else if (l < 3) { | |
150 | a = r == e && buf[0] == '\0'; | |
151 | } else if (l < 4) { | |
152 | a = r == e && !strcmp(buf, t); | |
153 | } else if (ascii) { | |
154 | if (l < 51) | |
155 | a = r == e && buf[l - 1] == '\0' && buf[l - 2] == ' '; | |
156 | else | |
157 | a = r == e && buf[50] == '\0' && buf[49] == '.'; | |
158 | } else { | |
159 | a = r == e && buf[e] == '\0'; | |
160 | } | |
161 | ||
162 | if (!a) { | |
163 | pr_err("Len: %zu rc: %u strlen: %zu\n", l, r, strlen(buf)); | |
164 | pr_err("Result: '%s'\n", buf); | |
165 | } | |
166 | } | |
167 | ||
64d1d77a AS |
168 | static int __init test_hexdump_init(void) |
169 | { | |
170 | unsigned int i; | |
171 | int rowsize; | |
172 | ||
173 | pr_info("Running tests...\n"); | |
174 | ||
175 | rowsize = (get_random_int() % 2 + 1) * 16; | |
176 | for (i = 0; i < 16; i++) | |
177 | test_hexdump_set(rowsize, false); | |
178 | ||
179 | rowsize = (get_random_int() % 2 + 1) * 16; | |
180 | for (i = 0; i < 16; i++) | |
181 | test_hexdump_set(rowsize, true); | |
182 | ||
114fc1af AS |
183 | for (i = 0; i < 16; i++) |
184 | test_hexdump_overflow(false); | |
185 | ||
186 | for (i = 0; i < 16; i++) | |
187 | test_hexdump_overflow(true); | |
188 | ||
64d1d77a AS |
189 | return -EINVAL; |
190 | } | |
191 | module_init(test_hexdump_init); | |
192 | MODULE_LICENSE("Dual BSD/GPL"); |