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50f530e1 RF |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * Test cases for sscanf facility. | |
4 | */ | |
5 | ||
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
7 | ||
8 | #include <linux/bitops.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/overflow.h> | |
13 | #include <linux/printk.h> | |
0402779a | 14 | #include <linux/prandom.h> |
50f530e1 RF |
15 | #include <linux/slab.h> |
16 | #include <linux/string.h> | |
17 | ||
18 | #include "../tools/testing/selftests/kselftest_module.h" | |
19 | ||
20 | #define BUF_SIZE 1024 | |
21 | ||
22 | KSTM_MODULE_GLOBALS(); | |
23 | static char *test_buffer __initdata; | |
24 | static char *fmt_buffer __initdata; | |
25 | static struct rnd_state rnd_state __initdata; | |
26 | ||
27 | typedef int (*check_fn)(const void *check_data, const char *string, | |
28 | const char *fmt, int n_args, va_list ap); | |
29 | ||
30 | static void __scanf(4, 6) __init | |
31 | _test(check_fn fn, const void *check_data, const char *string, const char *fmt, | |
32 | int n_args, ...) | |
33 | { | |
34 | va_list ap, ap_copy; | |
35 | int ret; | |
36 | ||
37 | total_tests++; | |
38 | ||
39 | va_start(ap, n_args); | |
40 | va_copy(ap_copy, ap); | |
41 | ret = vsscanf(string, fmt, ap_copy); | |
42 | va_end(ap_copy); | |
43 | ||
44 | if (ret != n_args) { | |
45 | pr_warn("vsscanf(\"%s\", \"%s\", ...) returned %d expected %d\n", | |
46 | string, fmt, ret, n_args); | |
47 | goto fail; | |
48 | } | |
49 | ||
50 | ret = (*fn)(check_data, string, fmt, n_args, ap); | |
51 | if (ret) | |
52 | goto fail; | |
53 | ||
54 | va_end(ap); | |
55 | ||
56 | return; | |
57 | ||
58 | fail: | |
59 | failed_tests++; | |
60 | va_end(ap); | |
61 | } | |
62 | ||
63 | #define _check_numbers_template(arg_fmt, expect, str, fmt, n_args, ap) \ | |
64 | do { \ | |
65 | pr_debug("\"%s\", \"%s\" ->\n", str, fmt); \ | |
66 | for (; n_args > 0; n_args--, expect++) { \ | |
67 | typeof(*expect) got = *va_arg(ap, typeof(expect)); \ | |
68 | pr_debug("\t" arg_fmt "\n", got); \ | |
69 | if (got != *expect) { \ | |
70 | pr_warn("vsscanf(\"%s\", \"%s\", ...) expected " arg_fmt " got " arg_fmt "\n", \ | |
71 | str, fmt, *expect, got); \ | |
72 | return 1; \ | |
73 | } \ | |
74 | } \ | |
75 | return 0; \ | |
76 | } while (0) | |
77 | ||
78 | static int __init check_ull(const void *check_data, const char *string, | |
79 | const char *fmt, int n_args, va_list ap) | |
80 | { | |
81 | const unsigned long long *pval = check_data; | |
82 | ||
83 | _check_numbers_template("%llu", pval, string, fmt, n_args, ap); | |
84 | } | |
85 | ||
86 | static int __init check_ll(const void *check_data, const char *string, | |
87 | const char *fmt, int n_args, va_list ap) | |
88 | { | |
89 | const long long *pval = check_data; | |
90 | ||
91 | _check_numbers_template("%lld", pval, string, fmt, n_args, ap); | |
92 | } | |
93 | ||
94 | static int __init check_ulong(const void *check_data, const char *string, | |
95 | const char *fmt, int n_args, va_list ap) | |
96 | { | |
97 | const unsigned long *pval = check_data; | |
98 | ||
99 | _check_numbers_template("%lu", pval, string, fmt, n_args, ap); | |
100 | } | |
101 | ||
102 | static int __init check_long(const void *check_data, const char *string, | |
103 | const char *fmt, int n_args, va_list ap) | |
104 | { | |
105 | const long *pval = check_data; | |
106 | ||
107 | _check_numbers_template("%ld", pval, string, fmt, n_args, ap); | |
108 | } | |
109 | ||
110 | static int __init check_uint(const void *check_data, const char *string, | |
111 | const char *fmt, int n_args, va_list ap) | |
112 | { | |
113 | const unsigned int *pval = check_data; | |
114 | ||
115 | _check_numbers_template("%u", pval, string, fmt, n_args, ap); | |
116 | } | |
117 | ||
118 | static int __init check_int(const void *check_data, const char *string, | |
119 | const char *fmt, int n_args, va_list ap) | |
120 | { | |
121 | const int *pval = check_data; | |
122 | ||
123 | _check_numbers_template("%d", pval, string, fmt, n_args, ap); | |
124 | } | |
125 | ||
126 | static int __init check_ushort(const void *check_data, const char *string, | |
127 | const char *fmt, int n_args, va_list ap) | |
128 | { | |
129 | const unsigned short *pval = check_data; | |
130 | ||
131 | _check_numbers_template("%hu", pval, string, fmt, n_args, ap); | |
132 | } | |
133 | ||
134 | static int __init check_short(const void *check_data, const char *string, | |
135 | const char *fmt, int n_args, va_list ap) | |
136 | { | |
137 | const short *pval = check_data; | |
138 | ||
139 | _check_numbers_template("%hd", pval, string, fmt, n_args, ap); | |
140 | } | |
141 | ||
142 | static int __init check_uchar(const void *check_data, const char *string, | |
143 | const char *fmt, int n_args, va_list ap) | |
144 | { | |
145 | const unsigned char *pval = check_data; | |
146 | ||
147 | _check_numbers_template("%hhu", pval, string, fmt, n_args, ap); | |
148 | } | |
149 | ||
150 | static int __init check_char(const void *check_data, const char *string, | |
151 | const char *fmt, int n_args, va_list ap) | |
152 | { | |
153 | const signed char *pval = check_data; | |
154 | ||
155 | _check_numbers_template("%hhd", pval, string, fmt, n_args, ap); | |
156 | } | |
157 | ||
158 | /* Selection of interesting numbers to test, copied from test-kstrtox.c */ | |
159 | static const unsigned long long numbers[] __initconst = { | |
160 | 0x0ULL, | |
161 | 0x1ULL, | |
162 | 0x7fULL, | |
163 | 0x80ULL, | |
164 | 0x81ULL, | |
165 | 0xffULL, | |
166 | 0x100ULL, | |
167 | 0x101ULL, | |
168 | 0x7fffULL, | |
169 | 0x8000ULL, | |
170 | 0x8001ULL, | |
171 | 0xffffULL, | |
172 | 0x10000ULL, | |
173 | 0x10001ULL, | |
174 | 0x7fffffffULL, | |
175 | 0x80000000ULL, | |
176 | 0x80000001ULL, | |
177 | 0xffffffffULL, | |
178 | 0x100000000ULL, | |
179 | 0x100000001ULL, | |
180 | 0x7fffffffffffffffULL, | |
181 | 0x8000000000000000ULL, | |
182 | 0x8000000000000001ULL, | |
183 | 0xfffffffffffffffeULL, | |
184 | 0xffffffffffffffffULL, | |
185 | }; | |
186 | ||
187 | #define value_representable_in_type(T, val) \ | |
188 | (is_signed_type(T) \ | |
189 | ? ((long long)(val) >= type_min(T)) && ((long long)(val) <= type_max(T)) \ | |
1b932689 RF |
190 | : ((unsigned long long)(val) <= type_max(T))) |
191 | ||
50f530e1 RF |
192 | |
193 | #define test_one_number(T, gen_fmt, scan_fmt, val, fn) \ | |
194 | do { \ | |
195 | const T expect_val = (T)(val); \ | |
196 | T result = ~expect_val; /* should be overwritten */ \ | |
197 | \ | |
198 | snprintf(test_buffer, BUF_SIZE, gen_fmt, expect_val); \ | |
199 | _test(fn, &expect_val, test_buffer, "%" scan_fmt, 1, &result); \ | |
200 | } while (0) | |
201 | ||
202 | #define simple_numbers_loop(T, gen_fmt, scan_fmt, fn) \ | |
203 | do { \ | |
204 | int i; \ | |
205 | \ | |
206 | for (i = 0; i < ARRAY_SIZE(numbers); i++) { \ | |
1b932689 RF |
207 | if (value_representable_in_type(T, numbers[i])) \ |
208 | test_one_number(T, gen_fmt, scan_fmt, \ | |
209 | numbers[i], fn); \ | |
50f530e1 | 210 | \ |
1b932689 | 211 | if (value_representable_in_type(T, -numbers[i])) \ |
50f530e1 RF |
212 | test_one_number(T, gen_fmt, scan_fmt, \ |
213 | -numbers[i], fn); \ | |
214 | } \ | |
215 | } while (0) | |
216 | ||
217 | static void __init numbers_simple(void) | |
218 | { | |
219 | simple_numbers_loop(unsigned long long, "%llu", "llu", check_ull); | |
220 | simple_numbers_loop(long long, "%lld", "lld", check_ll); | |
221 | simple_numbers_loop(long long, "%lld", "lli", check_ll); | |
222 | simple_numbers_loop(unsigned long long, "%llx", "llx", check_ull); | |
223 | simple_numbers_loop(long long, "%llx", "llx", check_ll); | |
224 | simple_numbers_loop(long long, "0x%llx", "lli", check_ll); | |
225 | simple_numbers_loop(unsigned long long, "0x%llx", "llx", check_ull); | |
226 | simple_numbers_loop(long long, "0x%llx", "llx", check_ll); | |
227 | ||
228 | simple_numbers_loop(unsigned long, "%lu", "lu", check_ulong); | |
229 | simple_numbers_loop(long, "%ld", "ld", check_long); | |
230 | simple_numbers_loop(long, "%ld", "li", check_long); | |
231 | simple_numbers_loop(unsigned long, "%lx", "lx", check_ulong); | |
232 | simple_numbers_loop(long, "%lx", "lx", check_long); | |
233 | simple_numbers_loop(long, "0x%lx", "li", check_long); | |
234 | simple_numbers_loop(unsigned long, "0x%lx", "lx", check_ulong); | |
235 | simple_numbers_loop(long, "0x%lx", "lx", check_long); | |
236 | ||
237 | simple_numbers_loop(unsigned int, "%u", "u", check_uint); | |
238 | simple_numbers_loop(int, "%d", "d", check_int); | |
239 | simple_numbers_loop(int, "%d", "i", check_int); | |
240 | simple_numbers_loop(unsigned int, "%x", "x", check_uint); | |
241 | simple_numbers_loop(int, "%x", "x", check_int); | |
242 | simple_numbers_loop(int, "0x%x", "i", check_int); | |
243 | simple_numbers_loop(unsigned int, "0x%x", "x", check_uint); | |
244 | simple_numbers_loop(int, "0x%x", "x", check_int); | |
245 | ||
246 | simple_numbers_loop(unsigned short, "%hu", "hu", check_ushort); | |
247 | simple_numbers_loop(short, "%hd", "hd", check_short); | |
248 | simple_numbers_loop(short, "%hd", "hi", check_short); | |
249 | simple_numbers_loop(unsigned short, "%hx", "hx", check_ushort); | |
250 | simple_numbers_loop(short, "%hx", "hx", check_short); | |
251 | simple_numbers_loop(short, "0x%hx", "hi", check_short); | |
252 | simple_numbers_loop(unsigned short, "0x%hx", "hx", check_ushort); | |
253 | simple_numbers_loop(short, "0x%hx", "hx", check_short); | |
254 | ||
255 | simple_numbers_loop(unsigned char, "%hhu", "hhu", check_uchar); | |
256 | simple_numbers_loop(signed char, "%hhd", "hhd", check_char); | |
257 | simple_numbers_loop(signed char, "%hhd", "hhi", check_char); | |
258 | simple_numbers_loop(unsigned char, "%hhx", "hhx", check_uchar); | |
259 | simple_numbers_loop(signed char, "%hhx", "hhx", check_char); | |
260 | simple_numbers_loop(signed char, "0x%hhx", "hhi", check_char); | |
261 | simple_numbers_loop(unsigned char, "0x%hhx", "hhx", check_uchar); | |
262 | simple_numbers_loop(signed char, "0x%hhx", "hhx", check_char); | |
263 | } | |
264 | ||
265 | /* | |
266 | * This gives a better variety of number "lengths" in a small sample than | |
267 | * the raw prandom*() functions (Not mathematically rigorous!!). | |
268 | * Variabilty of length and value is more important than perfect randomness. | |
269 | */ | |
270 | static u32 __init next_test_random(u32 max_bits) | |
271 | { | |
272 | u32 n_bits = hweight32(prandom_u32_state(&rnd_state)) % (max_bits + 1); | |
273 | ||
fe8e3ee0 | 274 | return prandom_u32_state(&rnd_state) & GENMASK(n_bits, 0); |
50f530e1 RF |
275 | } |
276 | ||
277 | static unsigned long long __init next_test_random_ull(void) | |
278 | { | |
279 | u32 rand1 = prandom_u32_state(&rnd_state); | |
280 | u32 n_bits = (hweight32(rand1) * 3) % 64; | |
281 | u64 val = (u64)prandom_u32_state(&rnd_state) * rand1; | |
282 | ||
fe8e3ee0 | 283 | return val & GENMASK_ULL(n_bits, 0); |
50f530e1 RF |
284 | } |
285 | ||
286 | #define random_for_type(T) \ | |
287 | ((T)(sizeof(T) <= sizeof(u32) \ | |
288 | ? next_test_random(BITS_PER_TYPE(T)) \ | |
289 | : next_test_random_ull())) | |
290 | ||
291 | /* | |
292 | * Define a pattern of negative and positive numbers to ensure we get | |
293 | * some of both within the small number of samples in a test string. | |
294 | */ | |
295 | #define NEGATIVES_PATTERN 0x3246 /* 00110010 01000110 */ | |
296 | ||
297 | #define fill_random_array(arr) \ | |
298 | do { \ | |
299 | unsigned int neg_pattern = NEGATIVES_PATTERN; \ | |
300 | int i; \ | |
301 | \ | |
302 | for (i = 0; i < ARRAY_SIZE(arr); i++, neg_pattern >>= 1) { \ | |
303 | (arr)[i] = random_for_type(typeof((arr)[0])); \ | |
304 | if (is_signed_type(typeof((arr)[0])) && (neg_pattern & 1)) \ | |
305 | (arr)[i] = -(arr)[i]; \ | |
306 | } \ | |
307 | } while (0) | |
308 | ||
309 | /* | |
310 | * Convenience wrapper around snprintf() to append at buf_pos in buf, | |
311 | * updating buf_pos and returning the number of characters appended. | |
312 | * On error buf_pos is not changed and return value is 0. | |
313 | */ | |
314 | static int __init __printf(4, 5) | |
315 | append_fmt(char *buf, int *buf_pos, int buf_len, const char *val_fmt, ...) | |
316 | { | |
317 | va_list ap; | |
318 | int field_len; | |
319 | ||
320 | va_start(ap, val_fmt); | |
321 | field_len = vsnprintf(buf + *buf_pos, buf_len - *buf_pos, val_fmt, ap); | |
322 | va_end(ap); | |
323 | ||
324 | if (field_len < 0) | |
325 | field_len = 0; | |
326 | ||
327 | *buf_pos += field_len; | |
328 | ||
329 | return field_len; | |
330 | } | |
331 | ||
332 | /* | |
333 | * Convenience function to append the field delimiter string | |
334 | * to both the value string and format string buffers. | |
335 | */ | |
336 | static void __init append_delim(char *str_buf, int *str_buf_pos, int str_buf_len, | |
337 | char *fmt_buf, int *fmt_buf_pos, int fmt_buf_len, | |
338 | const char *delim_str) | |
339 | { | |
340 | append_fmt(str_buf, str_buf_pos, str_buf_len, delim_str); | |
341 | append_fmt(fmt_buf, fmt_buf_pos, fmt_buf_len, delim_str); | |
342 | } | |
343 | ||
344 | #define test_array_8(fn, check_data, string, fmt, arr) \ | |
345 | do { \ | |
346 | BUILD_BUG_ON(ARRAY_SIZE(arr) != 8); \ | |
347 | _test(fn, check_data, string, fmt, 8, \ | |
348 | &(arr)[0], &(arr)[1], &(arr)[2], &(arr)[3], \ | |
349 | &(arr)[4], &(arr)[5], &(arr)[6], &(arr)[7]); \ | |
350 | } while (0) | |
351 | ||
352 | #define numbers_list_8(T, gen_fmt, field_sep, scan_fmt, fn) \ | |
353 | do { \ | |
354 | int i, pos = 0, fmt_pos = 0; \ | |
355 | T expect[8], result[8]; \ | |
356 | \ | |
357 | fill_random_array(expect); \ | |
358 | \ | |
359 | for (i = 0; i < ARRAY_SIZE(expect); i++) { \ | |
360 | if (i != 0) \ | |
361 | append_delim(test_buffer, &pos, BUF_SIZE, \ | |
362 | fmt_buffer, &fmt_pos, BUF_SIZE, \ | |
363 | field_sep); \ | |
364 | \ | |
365 | append_fmt(test_buffer, &pos, BUF_SIZE, gen_fmt, expect[i]); \ | |
366 | append_fmt(fmt_buffer, &fmt_pos, BUF_SIZE, "%%%s", scan_fmt); \ | |
367 | } \ | |
368 | \ | |
369 | test_array_8(fn, expect, test_buffer, fmt_buffer, result); \ | |
370 | } while (0) | |
371 | ||
372 | #define numbers_list_fix_width(T, gen_fmt, field_sep, width, scan_fmt, fn) \ | |
373 | do { \ | |
374 | char full_fmt[16]; \ | |
375 | \ | |
376 | snprintf(full_fmt, sizeof(full_fmt), "%u%s", width, scan_fmt); \ | |
377 | numbers_list_8(T, gen_fmt, field_sep, full_fmt, fn); \ | |
378 | } while (0) | |
379 | ||
380 | #define numbers_list_val_width(T, gen_fmt, field_sep, scan_fmt, fn) \ | |
381 | do { \ | |
382 | int i, val_len, pos = 0, fmt_pos = 0; \ | |
383 | T expect[8], result[8]; \ | |
384 | \ | |
385 | fill_random_array(expect); \ | |
386 | \ | |
387 | for (i = 0; i < ARRAY_SIZE(expect); i++) { \ | |
388 | if (i != 0) \ | |
389 | append_delim(test_buffer, &pos, BUF_SIZE, \ | |
390 | fmt_buffer, &fmt_pos, BUF_SIZE, field_sep);\ | |
391 | \ | |
392 | val_len = append_fmt(test_buffer, &pos, BUF_SIZE, gen_fmt, \ | |
393 | expect[i]); \ | |
394 | append_fmt(fmt_buffer, &fmt_pos, BUF_SIZE, \ | |
395 | "%%%u%s", val_len, scan_fmt); \ | |
396 | } \ | |
397 | \ | |
398 | test_array_8(fn, expect, test_buffer, fmt_buffer, result); \ | |
399 | } while (0) | |
400 | ||
ba7b1f86 | 401 | static void __init numbers_list_ll(const char *delim) |
50f530e1 RF |
402 | { |
403 | numbers_list_8(unsigned long long, "%llu", delim, "llu", check_ull); | |
404 | numbers_list_8(long long, "%lld", delim, "lld", check_ll); | |
405 | numbers_list_8(long long, "%lld", delim, "lli", check_ll); | |
406 | numbers_list_8(unsigned long long, "%llx", delim, "llx", check_ull); | |
407 | numbers_list_8(unsigned long long, "0x%llx", delim, "llx", check_ull); | |
408 | numbers_list_8(long long, "0x%llx", delim, "lli", check_ll); | |
ba7b1f86 | 409 | } |
50f530e1 | 410 | |
ba7b1f86 LT |
411 | static void __init numbers_list_l(const char *delim) |
412 | { | |
50f530e1 RF |
413 | numbers_list_8(unsigned long, "%lu", delim, "lu", check_ulong); |
414 | numbers_list_8(long, "%ld", delim, "ld", check_long); | |
415 | numbers_list_8(long, "%ld", delim, "li", check_long); | |
416 | numbers_list_8(unsigned long, "%lx", delim, "lx", check_ulong); | |
417 | numbers_list_8(unsigned long, "0x%lx", delim, "lx", check_ulong); | |
418 | numbers_list_8(long, "0x%lx", delim, "li", check_long); | |
ba7b1f86 | 419 | } |
50f530e1 | 420 | |
ba7b1f86 LT |
421 | static void __init numbers_list_d(const char *delim) |
422 | { | |
50f530e1 RF |
423 | numbers_list_8(unsigned int, "%u", delim, "u", check_uint); |
424 | numbers_list_8(int, "%d", delim, "d", check_int); | |
425 | numbers_list_8(int, "%d", delim, "i", check_int); | |
426 | numbers_list_8(unsigned int, "%x", delim, "x", check_uint); | |
427 | numbers_list_8(unsigned int, "0x%x", delim, "x", check_uint); | |
428 | numbers_list_8(int, "0x%x", delim, "i", check_int); | |
ba7b1f86 | 429 | } |
50f530e1 | 430 | |
ba7b1f86 LT |
431 | static void __init numbers_list_h(const char *delim) |
432 | { | |
50f530e1 RF |
433 | numbers_list_8(unsigned short, "%hu", delim, "hu", check_ushort); |
434 | numbers_list_8(short, "%hd", delim, "hd", check_short); | |
435 | numbers_list_8(short, "%hd", delim, "hi", check_short); | |
436 | numbers_list_8(unsigned short, "%hx", delim, "hx", check_ushort); | |
437 | numbers_list_8(unsigned short, "0x%hx", delim, "hx", check_ushort); | |
438 | numbers_list_8(short, "0x%hx", delim, "hi", check_short); | |
ba7b1f86 | 439 | } |
50f530e1 | 440 | |
ba7b1f86 LT |
441 | static void __init numbers_list_hh(const char *delim) |
442 | { | |
50f530e1 RF |
443 | numbers_list_8(unsigned char, "%hhu", delim, "hhu", check_uchar); |
444 | numbers_list_8(signed char, "%hhd", delim, "hhd", check_char); | |
445 | numbers_list_8(signed char, "%hhd", delim, "hhi", check_char); | |
446 | numbers_list_8(unsigned char, "%hhx", delim, "hhx", check_uchar); | |
447 | numbers_list_8(unsigned char, "0x%hhx", delim, "hhx", check_uchar); | |
448 | numbers_list_8(signed char, "0x%hhx", delim, "hhi", check_char); | |
449 | } | |
450 | ||
ba7b1f86 LT |
451 | static void __init numbers_list(const char *delim) |
452 | { | |
453 | numbers_list_ll(delim); | |
454 | numbers_list_l(delim); | |
455 | numbers_list_d(delim); | |
456 | numbers_list_h(delim); | |
457 | numbers_list_hh(delim); | |
458 | } | |
459 | ||
460 | static void __init numbers_list_field_width_ll(const char *delim) | |
50f530e1 RF |
461 | { |
462 | numbers_list_fix_width(unsigned long long, "%llu", delim, 20, "llu", check_ull); | |
463 | numbers_list_fix_width(long long, "%lld", delim, 20, "lld", check_ll); | |
464 | numbers_list_fix_width(long long, "%lld", delim, 20, "lli", check_ll); | |
465 | numbers_list_fix_width(unsigned long long, "%llx", delim, 16, "llx", check_ull); | |
466 | numbers_list_fix_width(unsigned long long, "0x%llx", delim, 18, "llx", check_ull); | |
467 | numbers_list_fix_width(long long, "0x%llx", delim, 18, "lli", check_ll); | |
ba7b1f86 | 468 | } |
50f530e1 | 469 | |
ba7b1f86 LT |
470 | static void __init numbers_list_field_width_l(const char *delim) |
471 | { | |
50f530e1 RF |
472 | #if BITS_PER_LONG == 64 |
473 | numbers_list_fix_width(unsigned long, "%lu", delim, 20, "lu", check_ulong); | |
474 | numbers_list_fix_width(long, "%ld", delim, 20, "ld", check_long); | |
475 | numbers_list_fix_width(long, "%ld", delim, 20, "li", check_long); | |
476 | numbers_list_fix_width(unsigned long, "%lx", delim, 16, "lx", check_ulong); | |
477 | numbers_list_fix_width(unsigned long, "0x%lx", delim, 18, "lx", check_ulong); | |
478 | numbers_list_fix_width(long, "0x%lx", delim, 18, "li", check_long); | |
479 | #else | |
480 | numbers_list_fix_width(unsigned long, "%lu", delim, 10, "lu", check_ulong); | |
481 | numbers_list_fix_width(long, "%ld", delim, 11, "ld", check_long); | |
482 | numbers_list_fix_width(long, "%ld", delim, 11, "li", check_long); | |
483 | numbers_list_fix_width(unsigned long, "%lx", delim, 8, "lx", check_ulong); | |
484 | numbers_list_fix_width(unsigned long, "0x%lx", delim, 10, "lx", check_ulong); | |
485 | numbers_list_fix_width(long, "0x%lx", delim, 10, "li", check_long); | |
486 | #endif | |
ba7b1f86 | 487 | } |
50f530e1 | 488 | |
ba7b1f86 LT |
489 | static void __init numbers_list_field_width_d(const char *delim) |
490 | { | |
50f530e1 RF |
491 | numbers_list_fix_width(unsigned int, "%u", delim, 10, "u", check_uint); |
492 | numbers_list_fix_width(int, "%d", delim, 11, "d", check_int); | |
493 | numbers_list_fix_width(int, "%d", delim, 11, "i", check_int); | |
494 | numbers_list_fix_width(unsigned int, "%x", delim, 8, "x", check_uint); | |
495 | numbers_list_fix_width(unsigned int, "0x%x", delim, 10, "x", check_uint); | |
496 | numbers_list_fix_width(int, "0x%x", delim, 10, "i", check_int); | |
ba7b1f86 | 497 | } |
50f530e1 | 498 | |
ba7b1f86 LT |
499 | static void __init numbers_list_field_width_h(const char *delim) |
500 | { | |
50f530e1 RF |
501 | numbers_list_fix_width(unsigned short, "%hu", delim, 5, "hu", check_ushort); |
502 | numbers_list_fix_width(short, "%hd", delim, 6, "hd", check_short); | |
503 | numbers_list_fix_width(short, "%hd", delim, 6, "hi", check_short); | |
504 | numbers_list_fix_width(unsigned short, "%hx", delim, 4, "hx", check_ushort); | |
505 | numbers_list_fix_width(unsigned short, "0x%hx", delim, 6, "hx", check_ushort); | |
506 | numbers_list_fix_width(short, "0x%hx", delim, 6, "hi", check_short); | |
ba7b1f86 | 507 | } |
50f530e1 | 508 | |
ba7b1f86 LT |
509 | static void __init numbers_list_field_width_hh(const char *delim) |
510 | { | |
50f530e1 RF |
511 | numbers_list_fix_width(unsigned char, "%hhu", delim, 3, "hhu", check_uchar); |
512 | numbers_list_fix_width(signed char, "%hhd", delim, 4, "hhd", check_char); | |
513 | numbers_list_fix_width(signed char, "%hhd", delim, 4, "hhi", check_char); | |
514 | numbers_list_fix_width(unsigned char, "%hhx", delim, 2, "hhx", check_uchar); | |
515 | numbers_list_fix_width(unsigned char, "0x%hhx", delim, 4, "hhx", check_uchar); | |
516 | numbers_list_fix_width(signed char, "0x%hhx", delim, 4, "hhi", check_char); | |
517 | } | |
518 | ||
519 | /* | |
520 | * List of numbers separated by delim. Each field width specifier is the | |
ba7b1f86 | 521 | * maximum possible digits for the given type and base. |
50f530e1 | 522 | */ |
ba7b1f86 LT |
523 | static void __init numbers_list_field_width_typemax(const char *delim) |
524 | { | |
525 | numbers_list_field_width_ll(delim); | |
526 | numbers_list_field_width_l(delim); | |
527 | numbers_list_field_width_d(delim); | |
528 | numbers_list_field_width_h(delim); | |
529 | numbers_list_field_width_hh(delim); | |
530 | } | |
531 | ||
532 | static void __init numbers_list_field_width_val_ll(const char *delim) | |
50f530e1 RF |
533 | { |
534 | numbers_list_val_width(unsigned long long, "%llu", delim, "llu", check_ull); | |
535 | numbers_list_val_width(long long, "%lld", delim, "lld", check_ll); | |
536 | numbers_list_val_width(long long, "%lld", delim, "lli", check_ll); | |
537 | numbers_list_val_width(unsigned long long, "%llx", delim, "llx", check_ull); | |
538 | numbers_list_val_width(unsigned long long, "0x%llx", delim, "llx", check_ull); | |
539 | numbers_list_val_width(long long, "0x%llx", delim, "lli", check_ll); | |
ba7b1f86 | 540 | } |
50f530e1 | 541 | |
ba7b1f86 LT |
542 | static void __init numbers_list_field_width_val_l(const char *delim) |
543 | { | |
50f530e1 RF |
544 | numbers_list_val_width(unsigned long, "%lu", delim, "lu", check_ulong); |
545 | numbers_list_val_width(long, "%ld", delim, "ld", check_long); | |
546 | numbers_list_val_width(long, "%ld", delim, "li", check_long); | |
547 | numbers_list_val_width(unsigned long, "%lx", delim, "lx", check_ulong); | |
548 | numbers_list_val_width(unsigned long, "0x%lx", delim, "lx", check_ulong); | |
549 | numbers_list_val_width(long, "0x%lx", delim, "li", check_long); | |
ba7b1f86 | 550 | } |
50f530e1 | 551 | |
ba7b1f86 LT |
552 | static void __init numbers_list_field_width_val_d(const char *delim) |
553 | { | |
50f530e1 RF |
554 | numbers_list_val_width(unsigned int, "%u", delim, "u", check_uint); |
555 | numbers_list_val_width(int, "%d", delim, "d", check_int); | |
556 | numbers_list_val_width(int, "%d", delim, "i", check_int); | |
557 | numbers_list_val_width(unsigned int, "%x", delim, "x", check_uint); | |
558 | numbers_list_val_width(unsigned int, "0x%x", delim, "x", check_uint); | |
559 | numbers_list_val_width(int, "0x%x", delim, "i", check_int); | |
ba7b1f86 | 560 | } |
50f530e1 | 561 | |
ba7b1f86 LT |
562 | static void __init numbers_list_field_width_val_h(const char *delim) |
563 | { | |
50f530e1 RF |
564 | numbers_list_val_width(unsigned short, "%hu", delim, "hu", check_ushort); |
565 | numbers_list_val_width(short, "%hd", delim, "hd", check_short); | |
566 | numbers_list_val_width(short, "%hd", delim, "hi", check_short); | |
567 | numbers_list_val_width(unsigned short, "%hx", delim, "hx", check_ushort); | |
568 | numbers_list_val_width(unsigned short, "0x%hx", delim, "hx", check_ushort); | |
569 | numbers_list_val_width(short, "0x%hx", delim, "hi", check_short); | |
ba7b1f86 | 570 | } |
50f530e1 | 571 | |
ba7b1f86 LT |
572 | static void __init numbers_list_field_width_val_hh(const char *delim) |
573 | { | |
50f530e1 RF |
574 | numbers_list_val_width(unsigned char, "%hhu", delim, "hhu", check_uchar); |
575 | numbers_list_val_width(signed char, "%hhd", delim, "hhd", check_char); | |
576 | numbers_list_val_width(signed char, "%hhd", delim, "hhi", check_char); | |
577 | numbers_list_val_width(unsigned char, "%hhx", delim, "hhx", check_uchar); | |
578 | numbers_list_val_width(unsigned char, "0x%hhx", delim, "hhx", check_uchar); | |
579 | numbers_list_val_width(signed char, "0x%hhx", delim, "hhi", check_char); | |
580 | } | |
581 | ||
ba7b1f86 LT |
582 | /* |
583 | * List of numbers separated by delim. Each field width specifier is the | |
584 | * exact length of the corresponding value digits in the string being scanned. | |
585 | */ | |
586 | static void __init numbers_list_field_width_val_width(const char *delim) | |
587 | { | |
588 | numbers_list_field_width_val_ll(delim); | |
589 | numbers_list_field_width_val_l(delim); | |
590 | numbers_list_field_width_val_d(delim); | |
591 | numbers_list_field_width_val_h(delim); | |
592 | numbers_list_field_width_val_hh(delim); | |
593 | } | |
594 | ||
50f530e1 RF |
595 | /* |
596 | * Slice a continuous string of digits without field delimiters, containing | |
597 | * numbers of varying length, using the field width to extract each group | |
598 | * of digits. For example the hex values c0,3,bf01,303 would have a | |
599 | * string representation of "c03bf01303" and extracted with "%2x%1x%4x%3x". | |
600 | */ | |
601 | static void __init numbers_slice(void) | |
602 | { | |
603 | numbers_list_field_width_val_width(""); | |
604 | } | |
605 | ||
606 | #define test_number_prefix(T, str, scan_fmt, expect0, expect1, n_args, fn) \ | |
607 | do { \ | |
608 | const T expect[2] = { expect0, expect1 }; \ | |
92382d74 | 609 | T result[2] = { (T)~expect[0], (T)~expect[1] }; \ |
50f530e1 RF |
610 | \ |
611 | _test(fn, &expect, str, scan_fmt, n_args, &result[0], &result[1]); \ | |
612 | } while (0) | |
613 | ||
614 | /* | |
615 | * Number prefix is >= field width. | |
616 | * Expected behaviour is derived from testing userland sscanf. | |
617 | */ | |
618 | static void __init numbers_prefix_overflow(void) | |
619 | { | |
620 | /* | |
621 | * Negative decimal with a field of width 1, should quit scanning | |
622 | * and return 0. | |
623 | */ | |
624 | test_number_prefix(long long, "-1 1", "%1lld %lld", 0, 0, 0, check_ll); | |
625 | test_number_prefix(long, "-1 1", "%1ld %ld", 0, 0, 0, check_long); | |
626 | test_number_prefix(int, "-1 1", "%1d %d", 0, 0, 0, check_int); | |
627 | test_number_prefix(short, "-1 1", "%1hd %hd", 0, 0, 0, check_short); | |
628 | test_number_prefix(signed char, "-1 1", "%1hhd %hhd", 0, 0, 0, check_char); | |
629 | ||
630 | test_number_prefix(long long, "-1 1", "%1lli %lli", 0, 0, 0, check_ll); | |
631 | test_number_prefix(long, "-1 1", "%1li %li", 0, 0, 0, check_long); | |
632 | test_number_prefix(int, "-1 1", "%1i %i", 0, 0, 0, check_int); | |
633 | test_number_prefix(short, "-1 1", "%1hi %hi", 0, 0, 0, check_short); | |
634 | test_number_prefix(signed char, "-1 1", "%1hhi %hhi", 0, 0, 0, check_char); | |
635 | ||
636 | /* | |
637 | * 0x prefix in a field of width 1: 0 is a valid digit so should | |
638 | * convert. Next field scan starts at the 'x' which isn't a digit so | |
639 | * scan quits with one field converted. | |
640 | */ | |
641 | test_number_prefix(unsigned long long, "0xA7", "%1llx%llx", 0, 0, 1, check_ull); | |
642 | test_number_prefix(unsigned long, "0xA7", "%1lx%lx", 0, 0, 1, check_ulong); | |
643 | test_number_prefix(unsigned int, "0xA7", "%1x%x", 0, 0, 1, check_uint); | |
644 | test_number_prefix(unsigned short, "0xA7", "%1hx%hx", 0, 0, 1, check_ushort); | |
645 | test_number_prefix(unsigned char, "0xA7", "%1hhx%hhx", 0, 0, 1, check_uchar); | |
646 | test_number_prefix(long long, "0xA7", "%1lli%llx", 0, 0, 1, check_ll); | |
647 | test_number_prefix(long, "0xA7", "%1li%lx", 0, 0, 1, check_long); | |
648 | test_number_prefix(int, "0xA7", "%1i%x", 0, 0, 1, check_int); | |
649 | test_number_prefix(short, "0xA7", "%1hi%hx", 0, 0, 1, check_short); | |
650 | test_number_prefix(char, "0xA7", "%1hhi%hhx", 0, 0, 1, check_char); | |
651 | ||
652 | /* | |
653 | * 0x prefix in a field of width 2 using %x conversion: first field | |
654 | * converts to 0. Next field scan starts at the character after "0x". | |
655 | * Both fields will convert. | |
656 | */ | |
657 | test_number_prefix(unsigned long long, "0xA7", "%2llx%llx", 0, 0xa7, 2, check_ull); | |
658 | test_number_prefix(unsigned long, "0xA7", "%2lx%lx", 0, 0xa7, 2, check_ulong); | |
659 | test_number_prefix(unsigned int, "0xA7", "%2x%x", 0, 0xa7, 2, check_uint); | |
660 | test_number_prefix(unsigned short, "0xA7", "%2hx%hx", 0, 0xa7, 2, check_ushort); | |
661 | test_number_prefix(unsigned char, "0xA7", "%2hhx%hhx", 0, 0xa7, 2, check_uchar); | |
662 | ||
663 | /* | |
664 | * 0x prefix in a field of width 2 using %i conversion: first field | |
665 | * converts to 0. Next field scan starts at the character after "0x", | |
53b0fe36 | 666 | * which will convert if can be interpreted as decimal but will fail |
50f530e1 RF |
667 | * if it contains any hex digits (since no 0x prefix). |
668 | */ | |
669 | test_number_prefix(long long, "0x67", "%2lli%lli", 0, 67, 2, check_ll); | |
670 | test_number_prefix(long, "0x67", "%2li%li", 0, 67, 2, check_long); | |
671 | test_number_prefix(int, "0x67", "%2i%i", 0, 67, 2, check_int); | |
672 | test_number_prefix(short, "0x67", "%2hi%hi", 0, 67, 2, check_short); | |
673 | test_number_prefix(char, "0x67", "%2hhi%hhi", 0, 67, 2, check_char); | |
674 | ||
675 | test_number_prefix(long long, "0xA7", "%2lli%lli", 0, 0, 1, check_ll); | |
676 | test_number_prefix(long, "0xA7", "%2li%li", 0, 0, 1, check_long); | |
677 | test_number_prefix(int, "0xA7", "%2i%i", 0, 0, 1, check_int); | |
678 | test_number_prefix(short, "0xA7", "%2hi%hi", 0, 0, 1, check_short); | |
679 | test_number_prefix(char, "0xA7", "%2hhi%hhi", 0, 0, 1, check_char); | |
680 | } | |
681 | ||
682 | #define _test_simple_strtoxx(T, fn, gen_fmt, expect, base) \ | |
683 | do { \ | |
684 | T got; \ | |
685 | char *endp; \ | |
686 | int len; \ | |
687 | bool fail = false; \ | |
688 | \ | |
689 | total_tests++; \ | |
690 | len = snprintf(test_buffer, BUF_SIZE, gen_fmt, expect); \ | |
691 | got = (fn)(test_buffer, &endp, base); \ | |
692 | pr_debug(#fn "(\"%s\", %d) -> " gen_fmt "\n", test_buffer, base, got); \ | |
693 | if (got != (expect)) { \ | |
694 | fail = true; \ | |
695 | pr_warn(#fn "(\"%s\", %d): got " gen_fmt " expected " gen_fmt "\n", \ | |
696 | test_buffer, base, got, expect); \ | |
697 | } else if (endp != test_buffer + len) { \ | |
698 | fail = true; \ | |
699 | pr_warn(#fn "(\"%s\", %d) startp=0x%px got endp=0x%px expected 0x%px\n", \ | |
700 | test_buffer, base, test_buffer, \ | |
701 | test_buffer + len, endp); \ | |
702 | } \ | |
703 | \ | |
704 | if (fail) \ | |
705 | failed_tests++; \ | |
706 | } while (0) | |
707 | ||
708 | #define test_simple_strtoxx(T, fn, gen_fmt, base) \ | |
709 | do { \ | |
710 | int i; \ | |
711 | \ | |
712 | for (i = 0; i < ARRAY_SIZE(numbers); i++) { \ | |
713 | _test_simple_strtoxx(T, fn, gen_fmt, (T)numbers[i], base); \ | |
714 | \ | |
715 | if (is_signed_type(T)) \ | |
716 | _test_simple_strtoxx(T, fn, gen_fmt, \ | |
717 | -(T)numbers[i], base); \ | |
718 | } \ | |
719 | } while (0) | |
720 | ||
721 | static void __init test_simple_strtoull(void) | |
722 | { | |
723 | test_simple_strtoxx(unsigned long long, simple_strtoull, "%llu", 10); | |
724 | test_simple_strtoxx(unsigned long long, simple_strtoull, "%llu", 0); | |
725 | test_simple_strtoxx(unsigned long long, simple_strtoull, "%llx", 16); | |
726 | test_simple_strtoxx(unsigned long long, simple_strtoull, "0x%llx", 16); | |
727 | test_simple_strtoxx(unsigned long long, simple_strtoull, "0x%llx", 0); | |
728 | } | |
729 | ||
730 | static void __init test_simple_strtoll(void) | |
731 | { | |
732 | test_simple_strtoxx(long long, simple_strtoll, "%lld", 10); | |
733 | test_simple_strtoxx(long long, simple_strtoll, "%lld", 0); | |
734 | test_simple_strtoxx(long long, simple_strtoll, "%llx", 16); | |
735 | test_simple_strtoxx(long long, simple_strtoll, "0x%llx", 16); | |
736 | test_simple_strtoxx(long long, simple_strtoll, "0x%llx", 0); | |
737 | } | |
738 | ||
739 | static void __init test_simple_strtoul(void) | |
740 | { | |
741 | test_simple_strtoxx(unsigned long, simple_strtoul, "%lu", 10); | |
742 | test_simple_strtoxx(unsigned long, simple_strtoul, "%lu", 0); | |
743 | test_simple_strtoxx(unsigned long, simple_strtoul, "%lx", 16); | |
744 | test_simple_strtoxx(unsigned long, simple_strtoul, "0x%lx", 16); | |
745 | test_simple_strtoxx(unsigned long, simple_strtoul, "0x%lx", 0); | |
746 | } | |
747 | ||
748 | static void __init test_simple_strtol(void) | |
749 | { | |
750 | test_simple_strtoxx(long, simple_strtol, "%ld", 10); | |
751 | test_simple_strtoxx(long, simple_strtol, "%ld", 0); | |
752 | test_simple_strtoxx(long, simple_strtol, "%lx", 16); | |
753 | test_simple_strtoxx(long, simple_strtol, "0x%lx", 16); | |
754 | test_simple_strtoxx(long, simple_strtol, "0x%lx", 0); | |
755 | } | |
756 | ||
757 | /* Selection of common delimiters/separators between numbers in a string. */ | |
758 | static const char * const number_delimiters[] __initconst = { | |
759 | " ", ":", ",", "-", "/", | |
760 | }; | |
761 | ||
762 | static void __init test_numbers(void) | |
763 | { | |
764 | int i; | |
765 | ||
766 | /* String containing only one number. */ | |
767 | numbers_simple(); | |
768 | ||
769 | /* String with multiple numbers separated by delimiter. */ | |
770 | for (i = 0; i < ARRAY_SIZE(number_delimiters); i++) { | |
771 | numbers_list(number_delimiters[i]); | |
772 | ||
773 | /* Field width may be longer than actual field digits. */ | |
774 | numbers_list_field_width_typemax(number_delimiters[i]); | |
775 | ||
776 | /* Each field width exactly length of actual field digits. */ | |
777 | numbers_list_field_width_val_width(number_delimiters[i]); | |
778 | } | |
779 | ||
780 | /* Slice continuous sequence of digits using field widths. */ | |
781 | numbers_slice(); | |
782 | ||
783 | numbers_prefix_overflow(); | |
784 | } | |
785 | ||
786 | static void __init selftest(void) | |
787 | { | |
788 | test_buffer = kmalloc(BUF_SIZE, GFP_KERNEL); | |
789 | if (!test_buffer) | |
790 | return; | |
791 | ||
792 | fmt_buffer = kmalloc(BUF_SIZE, GFP_KERNEL); | |
793 | if (!fmt_buffer) { | |
794 | kfree(test_buffer); | |
795 | return; | |
796 | } | |
797 | ||
798 | prandom_seed_state(&rnd_state, 3141592653589793238ULL); | |
799 | ||
800 | test_numbers(); | |
801 | ||
802 | test_simple_strtoull(); | |
803 | test_simple_strtoll(); | |
804 | test_simple_strtoul(); | |
805 | test_simple_strtol(); | |
806 | ||
807 | kfree(fmt_buffer); | |
808 | kfree(test_buffer); | |
809 | } | |
810 | ||
811 | KSTM_MODULE_LOADERS(test_scanf); | |
812 | MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); | |
a930fde9 | 813 | MODULE_DESCRIPTION("Test cases for sscanf facility"); |
50f530e1 | 814 | MODULE_LICENSE("GPL v2"); |