1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Test cases for printf facility. 4 */ 5 6 #include <kunit/test.h> 7 #include <linux/kernel.h> 8 #include <linux/module.h> 9 #include <linux/printk.h> 10 #include <linux/random.h> 11 #include <linux/rtc.h> 12 #include <linux/slab.h> 13 #include <linux/sprintf.h> 14 #include <linux/string.h> 15 16 #include <linux/bitmap.h> 17 #include <linux/dcache.h> 18 #include <linux/socket.h> 19 #include <linux/in.h> 20 #include <linux/in6.h> 21 22 #include <linux/gfp.h> 23 #include <linux/mm.h> 24 25 #include <linux/property.h> 26 27 #define BUF_SIZE 256 28 #define PAD_SIZE 16 29 #define FILL_CHAR '$' 30 31 #define NOWARN(option, comment, block) \ 32 __diag_push(); \ 33 __diag_ignore_all(#option, comment); \ 34 block \ 35 __diag_pop(); 36 37 static unsigned int total_tests; 38 39 static char *test_buffer; 40 static char *alloced_buffer; 41 42 static void __printf(7, 0) 43 do_test(struct kunit *kunittest, const char *file, const int line, int bufsize, const char *expect, 44 int elen, const char *fmt, va_list ap) 45 { 46 va_list aq; 47 int ret, written; 48 49 total_tests++; 50 51 memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE); 52 va_copy(aq, ap); 53 ret = vsnprintf(test_buffer, bufsize, fmt, aq); 54 va_end(aq); 55 56 if (ret != elen) { 57 KUNIT_FAIL(kunittest, 58 "%s:%d: vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n", 59 file, line, bufsize, fmt, ret, elen); 60 return; 61 } 62 63 if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) { 64 KUNIT_FAIL(kunittest, 65 "%s:%d: vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", 66 file, line, bufsize, fmt); 67 return; 68 } 69 70 if (!bufsize) { 71 if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) { 72 KUNIT_FAIL(kunittest, 73 "%s:%d: vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n", 74 file, line, fmt); 75 } 76 return; 77 } 78 79 written = min(bufsize-1, elen); 80 if (test_buffer[written]) { 81 KUNIT_FAIL(kunittest, 82 "%s:%d: vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n", 83 file, line, bufsize, fmt); 84 return; 85 } 86 87 if (memchr_inv(test_buffer + written + 1, FILL_CHAR, bufsize - (written + 1))) { 88 KUNIT_FAIL(kunittest, 89 "%s:%d: vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n", 90 file, line, bufsize, fmt); 91 return; 92 } 93 94 if (memchr_inv(test_buffer + bufsize, FILL_CHAR, BUF_SIZE + PAD_SIZE - bufsize)) { 95 KUNIT_FAIL(kunittest, 96 "%s:%d: vsnprintf(buf, %d, \"%s\", ...) wrote beyond buffer\n", 97 file, line, bufsize, fmt); 98 return; 99 } 100 101 if (memcmp(test_buffer, expect, written)) { 102 KUNIT_FAIL(kunittest, 103 "%s:%d: vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n", 104 file, line, bufsize, fmt, test_buffer, written, expect); 105 return; 106 } 107 } 108 109 static void __printf(6, 7) 110 __test(struct kunit *kunittest, const char *file, const int line, const char *expect, int elen, 111 const char *fmt, ...) 112 { 113 va_list ap; 114 int rand; 115 char *p; 116 117 if (elen >= BUF_SIZE) { 118 KUNIT_FAIL(kunittest, 119 "%s:%d: error in test suite: expected length (%d) >= BUF_SIZE (%d). fmt=\"%s\"\n", 120 file, line, elen, BUF_SIZE, fmt); 121 return; 122 } 123 124 va_start(ap, fmt); 125 126 /* 127 * Every fmt+args is subjected to four tests: Three where we 128 * tell vsnprintf varying buffer sizes (plenty, not quite 129 * enough and 0), and then we also test that kvasprintf would 130 * be able to print it as expected. 131 */ 132 do_test(kunittest, file, line, BUF_SIZE, expect, elen, fmt, ap); 133 rand = get_random_u32_inclusive(1, elen + 1); 134 /* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */ 135 do_test(kunittest, file, line, rand, expect, elen, fmt, ap); 136 do_test(kunittest, file, line, 0, expect, elen, fmt, ap); 137 138 p = kvasprintf(GFP_KERNEL, fmt, ap); 139 if (p) { 140 total_tests++; 141 if (memcmp(p, expect, elen+1)) { 142 KUNIT_FAIL(kunittest, 143 "%s:%d: kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n", 144 file, line, fmt, p, expect); 145 } 146 kfree(p); 147 } 148 va_end(ap); 149 } 150 151 #define test(expect, fmt, ...) \ 152 __test(kunittest, __FILE__, __LINE__, expect, strlen(expect), fmt, ##__VA_ARGS__) 153 154 static void 155 test_basic(struct kunit *kunittest) 156 { 157 /* Work around annoying "warning: zero-length gnu_printf format string". */ 158 char nul = '\0'; 159 160 test("", &nul); 161 test("100%", "100%%"); 162 test("xxx%yyy", "xxx%cyyy", '%'); 163 __test(kunittest, __FILE__, __LINE__, "xxx\0yyy", 7, "xxx%cyyy", '\0'); 164 } 165 166 static void 167 test_number(struct kunit *kunittest) 168 { 169 test("0x1234abcd ", "%#-12x", 0x1234abcd); 170 test(" 0x1234abcd", "%#12x", 0x1234abcd); 171 test("0|001| 12|+123| 1234|-123|-1234", "%d|%03d|%3d|%+d|% d|%+d|% d", 0, 1, 12, 123, 1234, -123, -1234); 172 NOWARN(-Wformat, "Intentionally test narrowing conversion specifiers.", { 173 test("0|1|1|128|255", "%hhu|%hhu|%hhu|%hhu|%hhu", 0, 1, 257, 128, -1); 174 test("0|1|1|-128|-1", "%hhd|%hhd|%hhd|%hhd|%hhd", 0, 1, 257, 128, -1); 175 test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627); 176 }) 177 /* 178 * POSIX/C99: »The result of converting zero with an explicit 179 * precision of zero shall be no characters.« Hence the output 180 * from the below test should really be "00|0||| ". However, 181 * the kernel's printf also produces a single 0 in that 182 * case. This test case simply documents the current 183 * behaviour. 184 */ 185 test("00|0|0|0|0", "%.2d|%.1d|%.0d|%.*d|%1.0d", 0, 0, 0, 0, 0, 0); 186 } 187 188 static void 189 test_string(struct kunit *kunittest) 190 { 191 test("", "%s%.0s", "", "123"); 192 test("ABCD|abc|123", "%s|%.3s|%.*s", "ABCD", "abcdef", 3, "123456"); 193 test("1 | 2|3 | 4|5 ", "%-3s|%3s|%-*s|%*s|%*s", "1", "2", 3, "3", 3, "4", -3, "5"); 194 test("1234 ", "%-10.4s", "123456"); 195 test(" 1234", "%10.4s", "123456"); 196 /* 197 * POSIX and C99 say that a negative precision (which is only 198 * possible to pass via a * argument) should be treated as if 199 * the precision wasn't present, and that if the precision is 200 * omitted (as in %.s), the precision should be taken to be 201 * 0. However, the kernel's printf behave exactly opposite, 202 * treating a negative precision as 0 and treating an omitted 203 * precision specifier as if no precision was given. 204 * 205 * These test cases document the current behaviour; should 206 * anyone ever feel the need to follow the standards more 207 * closely, this can be revisited. 208 */ 209 test(" ", "%4.*s", -5, "123456"); 210 test("123456", "%.s", "123456"); 211 test("a||", "%.s|%.0s|%.*s", "a", "b", 0, "c"); 212 test("a | | ", "%-3.s|%-3.0s|%-3.*s", "a", "b", 0, "c"); 213 } 214 215 #define PLAIN_BUF_SIZE 64 /* leave some space so we don't oops */ 216 217 #if BITS_PER_LONG == 64 218 219 #define PTR_WIDTH 16 220 #define PTR ((void *)0xffff0123456789abUL) 221 #define PTR_STR "ffff0123456789ab" 222 #define PTR_VAL_NO_CRNG "(____ptrval____)" 223 #define ZEROS "00000000" /* hex 32 zero bits */ 224 #define ONES "ffffffff" /* hex 32 one bits */ 225 226 #else 227 228 #define PTR_WIDTH 8 229 #define PTR ((void *)0x456789ab) 230 #define PTR_STR "456789ab" 231 #define PTR_VAL_NO_CRNG "(ptrval)" 232 #define ZEROS "" 233 #define ONES "" 234 235 #endif /* BITS_PER_LONG == 64 */ 236 237 static void 238 plain_hash_to_buffer(struct kunit *kunittest, const void *p, char *buf, size_t len) 239 { 240 KUNIT_ASSERT_EQ(kunittest, snprintf(buf, len, "%p", p), PTR_WIDTH); 241 242 if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) { 243 kunit_skip(kunittest, 244 "crng possibly not yet initialized. plain 'p' buffer contains \"%s\"\n", 245 PTR_VAL_NO_CRNG); 246 } 247 } 248 249 static void 250 hash_pointer(struct kunit *kunittest) 251 { 252 if (no_hash_pointers) 253 kunit_skip(kunittest, "hash pointers disabled"); 254 255 char buf[PLAIN_BUF_SIZE]; 256 257 plain_hash_to_buffer(kunittest, PTR, buf, PLAIN_BUF_SIZE); 258 259 /* 260 * The hash of %p is unpredictable, therefore test() cannot be used. 261 * 262 * Instead verify that the first 32 bits are zeros on a 64-bit system 263 * and that the non-hashed value is not printed. 264 */ 265 266 KUNIT_EXPECT_MEMEQ(kunittest, buf, ZEROS, strlen(ZEROS)); 267 KUNIT_EXPECT_MEMNEQ(kunittest, buf, PTR_STR, PTR_WIDTH); 268 } 269 270 /* 271 * This is a macro so that the compiler can compare its arguments to the 272 * __printf() attribute on __test(). This cannot be a function with a __printf() 273 * attribute because GCC requires __printf() functions to be variadic. 274 */ 275 #define test_hashed(kunittest, fmt, p) \ 276 do { \ 277 char buf[PLAIN_BUF_SIZE]; \ 278 plain_hash_to_buffer(kunittest, p, buf, PLAIN_BUF_SIZE); \ 279 test(buf, fmt, p); \ 280 } while (0) 281 282 /* 283 * NULL pointers aren't hashed. 284 */ 285 static void 286 null_pointer(struct kunit *kunittest) 287 { 288 test(ZEROS "00000000", "%p", NULL); 289 test(ZEROS "00000000", "%px", NULL); 290 test("(null)", "%pE", NULL); 291 } 292 293 /* 294 * Error pointers aren't hashed. 295 */ 296 static void 297 error_pointer(struct kunit *kunittest) 298 { 299 test(ONES "fffffff5", "%p", ERR_PTR(-11)); 300 test(ONES "fffffff5", "%px", ERR_PTR(-11)); 301 test("(efault)", "%pE", ERR_PTR(-11)); 302 } 303 304 #define PTR_INVALID ((void *)0x000000ab) 305 306 static void 307 invalid_pointer(struct kunit *kunittest) 308 { 309 test_hashed(kunittest, "%p", PTR_INVALID); 310 test(ZEROS "000000ab", "%px", PTR_INVALID); 311 test("(efault)", "%pE", PTR_INVALID); 312 } 313 314 static void 315 symbol_ptr(struct kunit *kunittest) 316 { 317 } 318 319 static void 320 kernel_ptr(struct kunit *kunittest) 321 { 322 /* We can't test this without access to kptr_restrict. */ 323 } 324 325 static void 326 struct_resource(struct kunit *kunittest) 327 { 328 struct resource test_resource = { 329 .start = 0xc0ffee00, 330 .end = 0xc0ffee00, 331 .flags = IORESOURCE_MEM, 332 }; 333 334 test("[mem 0xc0ffee00 flags 0x200]", 335 "%pr", &test_resource); 336 337 test_resource = (struct resource) { 338 .start = 0xc0ffee, 339 .end = 0xba5eba11, 340 .flags = IORESOURCE_MEM, 341 }; 342 test("[mem 0x00c0ffee-0xba5eba11 flags 0x200]", 343 "%pr", &test_resource); 344 345 test_resource = (struct resource) { 346 .start = 0xba5eba11, 347 .end = 0xc0ffee, 348 .flags = IORESOURCE_MEM, 349 }; 350 test("[mem 0xba5eba11-0x00c0ffee flags 0x200]", 351 "%pr", &test_resource); 352 353 test_resource = (struct resource) { 354 .start = 0xba5eba11, 355 .end = 0xba5eca11, 356 .flags = IORESOURCE_MEM, 357 }; 358 359 test("[mem 0xba5eba11-0xba5eca11 flags 0x200]", 360 "%pr", &test_resource); 361 362 test_resource = (struct resource) { 363 .start = 0xba11, 364 .end = 0xca10, 365 .flags = IORESOURCE_IO | 366 IORESOURCE_DISABLED | 367 IORESOURCE_UNSET, 368 }; 369 370 test("[io size 0x1000 disabled]", 371 "%pR", &test_resource); 372 } 373 374 static void 375 struct_range(struct kunit *kunittest) 376 { 377 struct range test_range = DEFINE_RANGE(0xc0ffee00ba5eba11, 378 0xc0ffee00ba5eba11); 379 test("[range 0xc0ffee00ba5eba11]", "%pra", &test_range); 380 381 test_range = DEFINE_RANGE(0xc0ffee, 0xba5eba11); 382 test("[range 0x0000000000c0ffee-0x00000000ba5eba11]", 383 "%pra", &test_range); 384 385 test_range = DEFINE_RANGE(0xba5eba11, 0xc0ffee); 386 test("[range 0x00000000ba5eba11-0x0000000000c0ffee]", 387 "%pra", &test_range); 388 } 389 390 static void 391 addr(struct kunit *kunittest) 392 { 393 } 394 395 static void 396 escaped_str(struct kunit *kunittest) 397 { 398 } 399 400 static void 401 hex_string(struct kunit *kunittest) 402 { 403 const char buf[3] = {0xc0, 0xff, 0xee}; 404 405 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee", 406 "%3ph|%3phC|%3phD|%3phN", buf, buf, buf, buf); 407 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee", 408 "%*ph|%*phC|%*phD|%*phN", 3, buf, 3, buf, 3, buf, 3, buf); 409 } 410 411 static void 412 mac(struct kunit *kunittest) 413 { 414 const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05}; 415 416 test("2d:48:d6:fc:7a:05", "%pM", addr); 417 test("05:7a:fc:d6:48:2d", "%pMR", addr); 418 test("2d-48-d6-fc-7a-05", "%pMF", addr); 419 test("2d48d6fc7a05", "%pm", addr); 420 test("057afcd6482d", "%pmR", addr); 421 } 422 423 static void 424 ip4(struct kunit *kunittest) 425 { 426 struct sockaddr_in sa; 427 428 sa.sin_family = AF_INET; 429 sa.sin_port = cpu_to_be16(12345); 430 sa.sin_addr.s_addr = cpu_to_be32(0x7f000001); 431 432 test("127.000.000.001|127.0.0.1", "%pi4|%pI4", &sa.sin_addr, &sa.sin_addr); 433 test("127.000.000.001|127.0.0.1", "%piS|%pIS", &sa, &sa); 434 sa.sin_addr.s_addr = cpu_to_be32(0x01020304); 435 test("001.002.003.004:12345|1.2.3.4:12345", "%piSp|%pISp", &sa, &sa); 436 } 437 438 static void 439 ip6(struct kunit *kunittest) 440 { 441 const struct in6_addr addr = { 442 .s6_addr = { 0x00, 0x01, 0x00, 0x02, 0x00, 0x03, 0x00, 0x04, 443 0x00, 0x05, 0x00, 0x06, 0x00, 0x07, 0x00, 0x08 } 444 }; 445 const struct in6_addr single_zero = { 446 .s6_addr = { 0x00, 0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x04, 447 0x00, 0x05, 0x00, 0x06, 0x00, 0x07, 0x00, 0x08 } 448 }; 449 struct sockaddr_in6 sa = { 450 .sin6_family = AF_INET6, 451 .sin6_port = cpu_to_be16(12345), 452 .sin6_addr = addr, 453 }; 454 455 test("00010002000300040005000600070008|0001:0002:0003:0004:0005:0006:0007:0008", 456 "%pi6|%pI6", &addr, &addr); 457 test("00010002000300040005000600070008|0001:0002:0003:0004:0005:0006:0007:0008", 458 "%piS|%pIS", &sa, &sa); 459 test("1:2:3:4:5:6:7:8", "%pI6c", &addr); 460 test("1:0:3:4:5:6:7:8", "%pI6c", &single_zero); 461 test("[1:2:3:4:5:6:7:8]:12345", "%pISpc", &sa); 462 } 463 464 static void 465 uuid(struct kunit *kunittest) 466 { 467 const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 468 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf}; 469 470 test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid); 471 test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid); 472 test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid); 473 test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid); 474 } 475 476 static struct dentry test_dentry[4] = { 477 { .d_parent = &test_dentry[0], 478 .d_name = QSTR_INIT(test_dentry[0].d_iname, 3), 479 .d_iname = "foo" }, 480 { .d_parent = &test_dentry[0], 481 .d_name = QSTR_INIT(test_dentry[1].d_iname, 5), 482 .d_iname = "bravo" }, 483 { .d_parent = &test_dentry[1], 484 .d_name = QSTR_INIT(test_dentry[2].d_iname, 4), 485 .d_iname = "alfa" }, 486 { .d_parent = &test_dentry[2], 487 .d_name = QSTR_INIT(test_dentry[3].d_iname, 5), 488 .d_iname = "romeo" }, 489 }; 490 491 static void 492 dentry(struct kunit *kunittest) 493 { 494 test("foo", "%pd", &test_dentry[0]); 495 test("foo", "%pd2", &test_dentry[0]); 496 497 test("(null)", "%pd", NULL); 498 test("(efault)", "%pd", PTR_INVALID); 499 test("(null)", "%pD", NULL); 500 test("(efault)", "%pD", PTR_INVALID); 501 502 test("romeo", "%pd", &test_dentry[3]); 503 test("alfa/romeo", "%pd2", &test_dentry[3]); 504 test("bravo/alfa/romeo", "%pd3", &test_dentry[3]); 505 test("/bravo/alfa/romeo", "%pd4", &test_dentry[3]); 506 test("/bravo/alfa", "%pd4", &test_dentry[2]); 507 508 test("bravo/alfa |bravo/alfa ", "%-12pd2|%*pd2", &test_dentry[2], -12, &test_dentry[2]); 509 test(" bravo/alfa| bravo/alfa", "%12pd2|%*pd2", &test_dentry[2], 12, &test_dentry[2]); 510 } 511 512 static void 513 struct_va_format(struct kunit *kunittest) 514 { 515 } 516 517 static void 518 time_and_date(struct kunit *kunittest) 519 { 520 /* 1543210543 */ 521 const struct rtc_time tm = { 522 .tm_sec = 43, 523 .tm_min = 35, 524 .tm_hour = 5, 525 .tm_mday = 26, 526 .tm_mon = 10, 527 .tm_year = 118, 528 }; 529 /* 2019-01-04T15:32:23 */ 530 time64_t t = 1546615943; 531 struct timespec64 ts = { .tv_sec = t, .tv_nsec = 11235813 }; 532 533 test("(%pt?)", "%pt", &tm); 534 test("2018-11-26T05:35:43", "%ptR", &tm); 535 test("0118-10-26T05:35:43", "%ptRr", &tm); 536 test("05:35:43|2018-11-26", "%ptRt|%ptRd", &tm, &tm); 537 test("05:35:43|0118-10-26", "%ptRtr|%ptRdr", &tm, &tm); 538 test("05:35:43|2018-11-26", "%ptRttr|%ptRdtr", &tm, &tm); 539 test("05:35:43 tr|2018-11-26 tr", "%ptRt tr|%ptRd tr", &tm, &tm); 540 541 test("2019-01-04T15:32:23", "%ptT", &t); 542 test("0119-00-04T15:32:23", "%ptTr", &t); 543 test("15:32:23|2019-01-04", "%ptTt|%ptTd", &t, &t); 544 test("15:32:23|0119-00-04", "%ptTtr|%ptTdr", &t, &t); 545 546 test("2019-01-04 15:32:23", "%ptTs", &t); 547 test("0119-00-04 15:32:23", "%ptTsr", &t); 548 test("15:32:23|2019-01-04", "%ptTts|%ptTds", &t, &t); 549 test("15:32:23|0119-00-04", "%ptTtrs|%ptTdrs", &t, &t); 550 551 test("2019-01-04T15:32:23.011235813", "%ptS", &ts); 552 test("1546615943.011235813", "%ptSp", &ts); 553 } 554 555 static void 556 struct_clk(struct kunit *kunittest) 557 { 558 } 559 560 static void 561 large_bitmap(struct kunit *kunittest) 562 { 563 const int nbits = 1 << 16; 564 unsigned long *bits = bitmap_zalloc(nbits, GFP_KERNEL); 565 if (!bits) 566 return; 567 568 bitmap_set(bits, 1, 20); 569 bitmap_set(bits, 60000, 15); 570 test("1-20,60000-60014", "%*pbl", nbits, bits); 571 bitmap_free(bits); 572 } 573 574 static void 575 bitmap(struct kunit *kunittest) 576 { 577 DECLARE_BITMAP(bits, 20); 578 const int primes[] = {2,3,5,7,11,13,17,19}; 579 int i; 580 581 bitmap_zero(bits, 20); 582 test("00000|00000", "%20pb|%*pb", bits, 20, bits); 583 test("|", "%20pbl|%*pbl", bits, 20, bits); 584 585 for (i = 0; i < ARRAY_SIZE(primes); ++i) 586 set_bit(primes[i], bits); 587 test("a28ac|a28ac", "%20pb|%*pb", bits, 20, bits); 588 test("2-3,5,7,11,13,17,19|2-3,5,7,11,13,17,19", "%20pbl|%*pbl", bits, 20, bits); 589 590 bitmap_fill(bits, 20); 591 test("fffff|fffff", "%20pb|%*pb", bits, 20, bits); 592 test("0-19|0-19", "%20pbl|%*pbl", bits, 20, bits); 593 594 large_bitmap(kunittest); 595 } 596 597 static void 598 netdev_features(struct kunit *kunittest) 599 { 600 } 601 602 struct page_flags_test { 603 int width; 604 int shift; 605 int mask; 606 const char *fmt; 607 const char *name; 608 }; 609 610 static const struct page_flags_test pft[] = { 611 {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK, 612 "%d", "section"}, 613 {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK, 614 "%d", "node"}, 615 {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK, 616 "%d", "zone"}, 617 {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK, 618 "%#x", "lastcpupid"}, 619 {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK, 620 "%#x", "kasantag"}, 621 }; 622 623 static void 624 page_flags_test(struct kunit *kunittest, int section, int node, int zone, 625 int last_cpupid, int kasan_tag, unsigned long flags, const char *name, 626 char *cmp_buf) 627 { 628 unsigned long values[] = {section, node, zone, last_cpupid, kasan_tag}; 629 unsigned long size; 630 bool append = false; 631 int i; 632 633 for (i = 0; i < ARRAY_SIZE(values); i++) 634 flags |= (values[i] & pft[i].mask) << pft[i].shift; 635 636 size = scnprintf(cmp_buf, BUF_SIZE, "%#lx(", flags); 637 if (flags & PAGEFLAGS_MASK) { 638 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s", name); 639 append = true; 640 } 641 642 for (i = 0; i < ARRAY_SIZE(pft); i++) { 643 if (!pft[i].width) 644 continue; 645 646 if (append) 647 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "|"); 648 649 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s=", 650 pft[i].name); 651 size += scnprintf(cmp_buf + size, BUF_SIZE - size, pft[i].fmt, 652 values[i] & pft[i].mask); 653 append = true; 654 } 655 656 snprintf(cmp_buf + size, BUF_SIZE - size, ")"); 657 658 test(cmp_buf, "%pGp", &flags); 659 } 660 661 static void 662 flags(struct kunit *kunittest) 663 { 664 unsigned long flags; 665 char *cmp_buffer; 666 gfp_t gfp; 667 668 cmp_buffer = kunit_kmalloc(kunittest, BUF_SIZE, GFP_KERNEL); 669 KUNIT_ASSERT_NOT_NULL(kunittest, cmp_buffer); 670 671 flags = 0; 672 page_flags_test(kunittest, 0, 0, 0, 0, 0, flags, "", cmp_buffer); 673 674 flags = 1UL << NR_PAGEFLAGS; 675 page_flags_test(kunittest, 0, 0, 0, 0, 0, flags, "", cmp_buffer); 676 677 flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru 678 | 1UL << PG_active | 1UL << PG_swapbacked; 679 page_flags_test(kunittest, 1, 1, 1, 0x1fffff, 1, flags, 680 "uptodate|dirty|lru|active|swapbacked", 681 cmp_buffer); 682 683 flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC; 684 test("read|exec|mayread|maywrite|mayexec", "%pGv", &flags); 685 686 gfp = GFP_TRANSHUGE; 687 test("GFP_TRANSHUGE", "%pGg", &gfp); 688 689 gfp = GFP_ATOMIC|__GFP_DMA; 690 test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp); 691 692 gfp = __GFP_HIGH; 693 test("__GFP_HIGH", "%pGg", &gfp); 694 695 /* Any flags not translated by the table should remain numeric */ 696 gfp = ~__GFP_BITS_MASK; 697 snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp); 698 test(cmp_buffer, "%pGg", &gfp); 699 700 snprintf(cmp_buffer, BUF_SIZE, "__GFP_HIGH|%#lx", 701 (unsigned long) gfp); 702 gfp |= __GFP_HIGH; 703 test(cmp_buffer, "%pGg", &gfp); 704 } 705 706 static void fwnode_pointer(struct kunit *kunittest) 707 { 708 const struct software_node first = { .name = "first" }; 709 const struct software_node second = { .name = "second", .parent = &first }; 710 const struct software_node third = { .name = "third", .parent = &second }; 711 const struct software_node *group[] = { &first, &second, &third, NULL }; 712 const char * const full_name_second = "first/second"; 713 const char * const full_name_third = "first/second/third"; 714 const char * const second_name = "second"; 715 const char * const third_name = "third"; 716 int rval; 717 718 rval = software_node_register_node_group(group); 719 if (rval) { 720 kunit_skip(kunittest, "cannot register softnodes; rval %d\n", rval); 721 } 722 723 test(full_name_second, "%pfw", software_node_fwnode(&second)); 724 test(full_name_third, "%pfw", software_node_fwnode(&third)); 725 test(full_name_third, "%pfwf", software_node_fwnode(&third)); 726 test(second_name, "%pfwP", software_node_fwnode(&second)); 727 test(third_name, "%pfwP", software_node_fwnode(&third)); 728 729 software_node_unregister_node_group(group); 730 } 731 732 struct fourcc_struct { 733 u32 code; 734 const char *str; 735 }; 736 737 static void fourcc_pointer_test(struct kunit *kunittest, const struct fourcc_struct *fc, 738 size_t n, const char *fmt) 739 { 740 size_t i; 741 742 for (i = 0; i < n; i++) 743 test(fc[i].str, fmt, &fc[i].code); 744 } 745 746 static void fourcc_pointer(struct kunit *kunittest) 747 { 748 static const struct fourcc_struct try_cc[] = { 749 { 0x3231564e, "NV12 little-endian (0x3231564e)", }, 750 { 0xb231564e, "NV12 big-endian (0xb231564e)", }, 751 { 0x10111213, ".... little-endian (0x10111213)", }, 752 { 0x20303159, "Y10 little-endian (0x20303159)", }, 753 }; 754 static const struct fourcc_struct try_ch[] = { 755 { 0x41424344, "ABCD (0x41424344)", }, 756 }; 757 static const struct fourcc_struct try_chR[] = { 758 { 0x41424344, "DCBA (0x44434241)", }, 759 }; 760 static const struct fourcc_struct try_cl[] = { 761 { (__force u32)cpu_to_le32(0x41424344), "ABCD (0x41424344)", }, 762 }; 763 static const struct fourcc_struct try_cb[] = { 764 { (__force u32)cpu_to_be32(0x41424344), "ABCD (0x41424344)", }, 765 }; 766 767 fourcc_pointer_test(kunittest, try_cc, ARRAY_SIZE(try_cc), "%p4cc"); 768 fourcc_pointer_test(kunittest, try_ch, ARRAY_SIZE(try_ch), "%p4ch"); 769 fourcc_pointer_test(kunittest, try_chR, ARRAY_SIZE(try_chR), "%p4chR"); 770 fourcc_pointer_test(kunittest, try_cl, ARRAY_SIZE(try_cl), "%p4cl"); 771 fourcc_pointer_test(kunittest, try_cb, ARRAY_SIZE(try_cb), "%p4cb"); 772 } 773 774 static void 775 errptr(struct kunit *kunittest) 776 { 777 test("-1234", "%pe", ERR_PTR(-1234)); 778 779 /* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */ 780 BUILD_BUG_ON(IS_ERR(PTR)); 781 test_hashed(kunittest, "%pe", PTR); 782 783 #ifdef CONFIG_SYMBOLIC_ERRNAME 784 test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK)); 785 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN)); 786 BUILD_BUG_ON(EAGAIN != EWOULDBLOCK); 787 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK)); 788 test("[-EIO ]", "[%-8pe]", ERR_PTR(-EIO)); 789 test("[ -EIO]", "[%8pe]", ERR_PTR(-EIO)); 790 test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER)); 791 #endif 792 } 793 794 static int printf_suite_init(struct kunit_suite *suite) 795 { 796 total_tests = 0; 797 798 alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL); 799 if (!alloced_buffer) 800 return -ENOMEM; 801 test_buffer = alloced_buffer + PAD_SIZE; 802 803 return 0; 804 } 805 806 static void printf_suite_exit(struct kunit_suite *suite) 807 { 808 kfree(alloced_buffer); 809 810 kunit_info(suite, "ran %u tests\n", total_tests); 811 } 812 813 static struct kunit_case printf_test_cases[] = { 814 KUNIT_CASE(test_basic), 815 KUNIT_CASE(test_number), 816 KUNIT_CASE(test_string), 817 KUNIT_CASE(hash_pointer), 818 KUNIT_CASE(null_pointer), 819 KUNIT_CASE(error_pointer), 820 KUNIT_CASE(invalid_pointer), 821 KUNIT_CASE(symbol_ptr), 822 KUNIT_CASE(kernel_ptr), 823 KUNIT_CASE(struct_resource), 824 KUNIT_CASE(struct_range), 825 KUNIT_CASE(addr), 826 KUNIT_CASE(escaped_str), 827 KUNIT_CASE(hex_string), 828 KUNIT_CASE(mac), 829 KUNIT_CASE(ip4), 830 KUNIT_CASE(ip6), 831 KUNIT_CASE(uuid), 832 KUNIT_CASE(dentry), 833 KUNIT_CASE(struct_va_format), 834 KUNIT_CASE(time_and_date), 835 KUNIT_CASE(struct_clk), 836 KUNIT_CASE(bitmap), 837 KUNIT_CASE(netdev_features), 838 KUNIT_CASE(flags), 839 KUNIT_CASE(errptr), 840 KUNIT_CASE(fwnode_pointer), 841 KUNIT_CASE(fourcc_pointer), 842 {} 843 }; 844 845 static struct kunit_suite printf_test_suite = { 846 .name = "printf", 847 .suite_init = printf_suite_init, 848 .suite_exit = printf_suite_exit, 849 .test_cases = printf_test_cases, 850 }; 851 852 kunit_test_suite(printf_test_suite); 853 854 MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>"); 855 MODULE_DESCRIPTION("Test cases for printf facility"); 856 MODULE_LICENSE("GPL"); 857