Commit | Line | Data |
---|---|---|
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 | ||
3db4a987 AS |
45 | #define FILL_CHAR '#' |
46 | ||
87977ca6 AS |
47 | static void __init test_hexdump_prepare_test(size_t len, int rowsize, |
48 | int groupsize, char *test, | |
49 | size_t testlen, bool ascii) | |
64d1d77a | 50 | { |
64d1d77a | 51 | char *p; |
17974c05 | 52 | const char * const *result; |
64d1d77a AS |
53 | size_t l = len; |
54 | int gs = groupsize, rs = rowsize; | |
55 | unsigned int i; | |
56 | ||
64d1d77a AS |
57 | if (rs != 16 && rs != 32) |
58 | rs = 16; | |
59 | ||
60 | if (l > rs) | |
61 | l = rs; | |
62 | ||
63 | if (!is_power_of_2(gs) || gs > 8 || (len % gs != 0)) | |
64 | gs = 1; | |
65 | ||
66 | if (gs == 8) | |
67 | result = test_data_8_le; | |
68 | else if (gs == 4) | |
69 | result = test_data_4_le; | |
70 | else if (gs == 2) | |
71 | result = test_data_2_le; | |
72 | else | |
73 | result = test_data_1_le; | |
74 | ||
64d1d77a AS |
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); | |
3db4a987 AS |
82 | p += amount; |
83 | ||
84 | *p++ = ' '; | |
64d1d77a AS |
85 | } |
86 | if (i) | |
87 | p--; | |
88 | ||
89 | /* ASCII part */ | |
90 | if (ascii) { | |
3db4a987 AS |
91 | do { |
92 | *p++ = ' '; | |
93 | } while (p < test + rs * 2 + rs / gs + 1); | |
94 | ||
64d1d77a AS |
95 | strncpy(p, data_a, l); |
96 | p += l; | |
97 | } | |
98 | ||
99 | *p = '\0'; | |
87977ca6 AS |
100 | } |
101 | ||
102 | #define TEST_HEXDUMP_BUF_SIZE (32 * 3 + 2 + 32 + 1) | |
103 | ||
104 | static void __init test_hexdump(size_t len, int rowsize, int groupsize, | |
105 | bool ascii) | |
106 | { | |
107 | char test[TEST_HEXDUMP_BUF_SIZE]; | |
108 | char real[TEST_HEXDUMP_BUF_SIZE]; | |
109 | ||
7047d813 | 110 | memset(real, FILL_CHAR, sizeof(real)); |
87977ca6 AS |
111 | hex_dump_to_buffer(data_b, len, rowsize, groupsize, real, sizeof(real), |
112 | ascii); | |
113 | ||
7047d813 | 114 | memset(test, FILL_CHAR, sizeof(test)); |
87977ca6 AS |
115 | test_hexdump_prepare_test(len, rowsize, groupsize, test, sizeof(test), |
116 | ascii); | |
64d1d77a | 117 | |
7047d813 | 118 | if (memcmp(test, real, TEST_HEXDUMP_BUF_SIZE)) { |
64d1d77a AS |
119 | pr_err("Len: %zu row: %d group: %d\n", len, rowsize, groupsize); |
120 | pr_err("Result: '%s'\n", real); | |
121 | pr_err("Expect: '%s'\n", test); | |
122 | } | |
123 | } | |
124 | ||
125 | static void __init test_hexdump_set(int rowsize, bool ascii) | |
126 | { | |
127 | size_t d = min_t(size_t, sizeof(data_b), rowsize); | |
128 | size_t len = get_random_int() % d + 1; | |
129 | ||
130 | test_hexdump(len, rowsize, 4, ascii); | |
131 | test_hexdump(len, rowsize, 2, ascii); | |
132 | test_hexdump(len, rowsize, 8, ascii); | |
133 | test_hexdump(len, rowsize, 1, ascii); | |
134 | } | |
135 | ||
1dacd9dd AS |
136 | static void __init test_hexdump_overflow(size_t buflen, size_t len, |
137 | int rowsize, int groupsize, | |
138 | bool ascii) | |
114fc1af | 139 | { |
cc77a719 | 140 | char test[TEST_HEXDUMP_BUF_SIZE]; |
a3d601fc | 141 | char buf[TEST_HEXDUMP_BUF_SIZE]; |
cc77a719 AS |
142 | int rs = rowsize, gs = groupsize; |
143 | int ae, he, e, f, r; | |
114fc1af | 144 | bool a; |
114fc1af | 145 | |
3db4a987 | 146 | memset(buf, FILL_CHAR, sizeof(buf)); |
114fc1af | 147 | |
ad27a755 AS |
148 | r = hex_dump_to_buffer(data_b, len, rs, gs, buf, buflen, ascii); |
149 | ||
150 | /* | |
151 | * Caller must provide the data length multiple of groupsize. The | |
152 | * calculations below are made with that assumption in mind. | |
153 | */ | |
154 | ae = rs * 2 /* hex */ + rs / gs /* spaces */ + 1 /* space */ + len /* ascii */; | |
155 | he = (gs * 2 /* hex */ + 1 /* space */) * len / gs - 1 /* no trailing space */; | |
114fc1af AS |
156 | |
157 | if (ascii) | |
ad27a755 | 158 | e = ae; |
114fc1af | 159 | else |
ad27a755 | 160 | e = he; |
cc77a719 AS |
161 | |
162 | f = min_t(int, e + 1, buflen); | |
163 | if (buflen) { | |
164 | test_hexdump_prepare_test(len, rs, gs, test, sizeof(test), ascii); | |
165 | test[f - 1] = '\0'; | |
114fc1af | 166 | } |
cc77a719 AS |
167 | memset(test + f, FILL_CHAR, sizeof(test) - f); |
168 | ||
169 | a = r == e && !memcmp(test, buf, TEST_HEXDUMP_BUF_SIZE); | |
170 | ||
171 | buf[sizeof(buf) - 1] = '\0'; | |
114fc1af AS |
172 | |
173 | if (!a) { | |
cc77a719 AS |
174 | pr_err("Len: %zu buflen: %zu strlen: %zu\n", |
175 | len, buflen, strnlen(buf, sizeof(buf))); | |
176 | pr_err("Result: %d '%s'\n", r, buf); | |
177 | pr_err("Expect: %d '%s'\n", e, test); | |
114fc1af AS |
178 | } |
179 | } | |
180 | ||
1dacd9dd AS |
181 | static void __init test_hexdump_overflow_set(size_t buflen, bool ascii) |
182 | { | |
183 | unsigned int i = 0; | |
184 | int rs = (get_random_int() % 2 + 1) * 16; | |
185 | ||
186 | do { | |
187 | int gs = 1 << i; | |
188 | size_t len = get_random_int() % rs + gs; | |
189 | ||
190 | test_hexdump_overflow(buflen, rounddown(len, gs), rs, gs, ascii); | |
191 | } while (i++ < 3); | |
192 | } | |
193 | ||
64d1d77a AS |
194 | static int __init test_hexdump_init(void) |
195 | { | |
196 | unsigned int i; | |
197 | int rowsize; | |
198 | ||
199 | pr_info("Running tests...\n"); | |
200 | ||
201 | rowsize = (get_random_int() % 2 + 1) * 16; | |
202 | for (i = 0; i < 16; i++) | |
203 | test_hexdump_set(rowsize, false); | |
204 | ||
205 | rowsize = (get_random_int() % 2 + 1) * 16; | |
206 | for (i = 0; i < 16; i++) | |
207 | test_hexdump_set(rowsize, true); | |
208 | ||
a3d601fc | 209 | for (i = 0; i <= TEST_HEXDUMP_BUF_SIZE; i++) |
1dacd9dd | 210 | test_hexdump_overflow_set(i, false); |
114fc1af | 211 | |
a3d601fc | 212 | for (i = 0; i <= TEST_HEXDUMP_BUF_SIZE; i++) |
1dacd9dd | 213 | test_hexdump_overflow_set(i, true); |
114fc1af | 214 | |
64d1d77a AS |
215 | return -EINVAL; |
216 | } | |
217 | module_init(test_hexdump_init); | |
218 | MODULE_LICENSE("Dual BSD/GPL"); |