1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Test cases for printf facility. 4 */ 5 6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7 8 #include <linux/init.h> 9 #include <linux/kernel.h> 10 #include <linux/module.h> 11 #include <linux/printk.h> 12 #include <linux/random.h> 13 #include <linux/rtc.h> 14 #include <linux/slab.h> 15 #include <linux/string.h> 16 17 #include <linux/bitmap.h> 18 #include <linux/dcache.h> 19 #include <linux/socket.h> 20 #include <linux/in.h> 21 22 #include <linux/gfp.h> 23 #include <linux/mm.h> 24 25 #include <linux/property.h> 26 27 #include "../tools/testing/selftests/kselftest_module.h" 28 29 #define BUF_SIZE 256 30 #define PAD_SIZE 16 31 #define FILL_CHAR '$' 32 33 #define NOWARN(option, comment, block) \ 34 __diag_push(); \ 35 __diag_ignore_all(#option, comment); \ 36 block \ 37 __diag_pop(); 38 39 KSTM_MODULE_GLOBALS(); 40 41 static char *test_buffer __initdata; 42 static char *alloced_buffer __initdata; 43 44 extern bool no_hash_pointers; 45 46 static int __printf(4, 0) __init 47 do_test(int bufsize, const char *expect, int elen, 48 const char *fmt, va_list ap) 49 { 50 va_list aq; 51 int ret, written; 52 53 total_tests++; 54 55 memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE); 56 va_copy(aq, ap); 57 ret = vsnprintf(test_buffer, bufsize, fmt, aq); 58 va_end(aq); 59 60 if (ret != elen) { 61 pr_warn("vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n", 62 bufsize, fmt, ret, elen); 63 return 1; 64 } 65 66 if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) { 67 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", bufsize, fmt); 68 return 1; 69 } 70 71 if (!bufsize) { 72 if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) { 73 pr_warn("vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n", 74 fmt); 75 return 1; 76 } 77 return 0; 78 } 79 80 written = min(bufsize-1, elen); 81 if (test_buffer[written]) { 82 pr_warn("vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n", 83 bufsize, fmt); 84 return 1; 85 } 86 87 if (memchr_inv(test_buffer + written + 1, FILL_CHAR, bufsize - (written + 1))) { 88 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n", 89 bufsize, fmt); 90 return 1; 91 } 92 93 if (memchr_inv(test_buffer + bufsize, FILL_CHAR, BUF_SIZE + PAD_SIZE - bufsize)) { 94 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond buffer\n", bufsize, fmt); 95 return 1; 96 } 97 98 if (memcmp(test_buffer, expect, written)) { 99 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n", 100 bufsize, fmt, test_buffer, written, expect); 101 return 1; 102 } 103 return 0; 104 } 105 106 static void __printf(3, 4) __init 107 __test(const char *expect, int elen, const char *fmt, ...) 108 { 109 va_list ap; 110 int rand; 111 char *p; 112 113 if (elen >= BUF_SIZE) { 114 pr_err("error in test suite: expected output length %d too long. Format was '%s'.\n", 115 elen, fmt); 116 failed_tests++; 117 return; 118 } 119 120 va_start(ap, fmt); 121 122 /* 123 * Every fmt+args is subjected to four tests: Three where we 124 * tell vsnprintf varying buffer sizes (plenty, not quite 125 * enough and 0), and then we also test that kvasprintf would 126 * be able to print it as expected. 127 */ 128 failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap); 129 rand = 1 + prandom_u32_max(elen+1); 130 /* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */ 131 failed_tests += do_test(rand, expect, elen, fmt, ap); 132 failed_tests += do_test(0, expect, elen, fmt, ap); 133 134 p = kvasprintf(GFP_KERNEL, fmt, ap); 135 if (p) { 136 total_tests++; 137 if (memcmp(p, expect, elen+1)) { 138 pr_warn("kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n", 139 fmt, p, expect); 140 failed_tests++; 141 } 142 kfree(p); 143 } 144 va_end(ap); 145 } 146 147 #define test(expect, fmt, ...) \ 148 __test(expect, strlen(expect), fmt, ##__VA_ARGS__) 149 150 static void __init 151 test_basic(void) 152 { 153 /* Work around annoying "warning: zero-length gnu_printf format string". */ 154 char nul = '\0'; 155 156 test("", &nul); 157 test("100%", "100%%"); 158 test("xxx%yyy", "xxx%cyyy", '%'); 159 __test("xxx\0yyy", 7, "xxx%cyyy", '\0'); 160 } 161 162 static void __init 163 test_number(void) 164 { 165 test("0x1234abcd ", "%#-12x", 0x1234abcd); 166 test(" 0x1234abcd", "%#12x", 0x1234abcd); 167 test("0|001| 12|+123| 1234|-123|-1234", "%d|%03d|%3d|%+d|% d|%+d|% d", 0, 1, 12, 123, 1234, -123, -1234); 168 NOWARN(-Wformat, "Intentionally test narrowing conversion specifiers.", { 169 test("0|1|1|128|255", "%hhu|%hhu|%hhu|%hhu|%hhu", 0, 1, 257, 128, -1); 170 test("0|1|1|-128|-1", "%hhd|%hhd|%hhd|%hhd|%hhd", 0, 1, 257, 128, -1); 171 test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627); 172 }) 173 /* 174 * POSIX/C99: »The result of converting zero with an explicit 175 * precision of zero shall be no characters.« Hence the output 176 * from the below test should really be "00|0||| ". However, 177 * the kernel's printf also produces a single 0 in that 178 * case. This test case simply documents the current 179 * behaviour. 180 */ 181 test("00|0|0|0|0", "%.2d|%.1d|%.0d|%.*d|%1.0d", 0, 0, 0, 0, 0, 0); 182 #ifndef __CHAR_UNSIGNED__ 183 { 184 /* 185 * Passing a 'char' to a %02x specifier doesn't do 186 * what was presumably the intention when char is 187 * signed and the value is negative. One must either & 188 * with 0xff or cast to u8. 189 */ 190 char val = -16; 191 test("0xfffffff0|0xf0|0xf0", "%#02x|%#02x|%#02x", val, val & 0xff, (u8)val); 192 } 193 #endif 194 } 195 196 static void __init 197 test_string(void) 198 { 199 test("", "%s%.0s", "", "123"); 200 test("ABCD|abc|123", "%s|%.3s|%.*s", "ABCD", "abcdef", 3, "123456"); 201 test("1 | 2|3 | 4|5 ", "%-3s|%3s|%-*s|%*s|%*s", "1", "2", 3, "3", 3, "4", -3, "5"); 202 test("1234 ", "%-10.4s", "123456"); 203 test(" 1234", "%10.4s", "123456"); 204 /* 205 * POSIX and C99 say that a negative precision (which is only 206 * possible to pass via a * argument) should be treated as if 207 * the precision wasn't present, and that if the precision is 208 * omitted (as in %.s), the precision should be taken to be 209 * 0. However, the kernel's printf behave exactly opposite, 210 * treating a negative precision as 0 and treating an omitted 211 * precision specifier as if no precision was given. 212 * 213 * These test cases document the current behaviour; should 214 * anyone ever feel the need to follow the standards more 215 * closely, this can be revisited. 216 */ 217 test(" ", "%4.*s", -5, "123456"); 218 test("123456", "%.s", "123456"); 219 test("a||", "%.s|%.0s|%.*s", "a", "b", 0, "c"); 220 test("a | | ", "%-3.s|%-3.0s|%-3.*s", "a", "b", 0, "c"); 221 } 222 223 #define PLAIN_BUF_SIZE 64 /* leave some space so we don't oops */ 224 225 #if BITS_PER_LONG == 64 226 227 #define PTR_WIDTH 16 228 #define PTR ((void *)0xffff0123456789abUL) 229 #define PTR_STR "ffff0123456789ab" 230 #define PTR_VAL_NO_CRNG "(____ptrval____)" 231 #define ZEROS "00000000" /* hex 32 zero bits */ 232 #define ONES "ffffffff" /* hex 32 one bits */ 233 234 static int __init 235 plain_format(void) 236 { 237 char buf[PLAIN_BUF_SIZE]; 238 int nchars; 239 240 nchars = snprintf(buf, PLAIN_BUF_SIZE, "%p", PTR); 241 242 if (nchars != PTR_WIDTH) 243 return -1; 244 245 if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) { 246 pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"", 247 PTR_VAL_NO_CRNG); 248 return 0; 249 } 250 251 if (strncmp(buf, ZEROS, strlen(ZEROS)) != 0) 252 return -1; 253 254 return 0; 255 } 256 257 #else 258 259 #define PTR_WIDTH 8 260 #define PTR ((void *)0x456789ab) 261 #define PTR_STR "456789ab" 262 #define PTR_VAL_NO_CRNG "(ptrval)" 263 #define ZEROS "" 264 #define ONES "" 265 266 static int __init 267 plain_format(void) 268 { 269 /* Format is implicitly tested for 32 bit machines by plain_hash() */ 270 return 0; 271 } 272 273 #endif /* BITS_PER_LONG == 64 */ 274 275 static int __init 276 plain_hash_to_buffer(const void *p, char *buf, size_t len) 277 { 278 int nchars; 279 280 nchars = snprintf(buf, len, "%p", p); 281 282 if (nchars != PTR_WIDTH) 283 return -1; 284 285 if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) { 286 pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"", 287 PTR_VAL_NO_CRNG); 288 return 0; 289 } 290 291 return 0; 292 } 293 294 static int __init 295 plain_hash(void) 296 { 297 char buf[PLAIN_BUF_SIZE]; 298 int ret; 299 300 ret = plain_hash_to_buffer(PTR, buf, PLAIN_BUF_SIZE); 301 if (ret) 302 return ret; 303 304 if (strncmp(buf, PTR_STR, PTR_WIDTH) == 0) 305 return -1; 306 307 return 0; 308 } 309 310 /* 311 * We can't use test() to test %p because we don't know what output to expect 312 * after an address is hashed. 313 */ 314 static void __init 315 plain(void) 316 { 317 int err; 318 319 if (no_hash_pointers) { 320 pr_warn("skipping plain 'p' tests"); 321 skipped_tests += 2; 322 return; 323 } 324 325 err = plain_hash(); 326 if (err) { 327 pr_warn("plain 'p' does not appear to be hashed\n"); 328 failed_tests++; 329 return; 330 } 331 332 err = plain_format(); 333 if (err) { 334 pr_warn("hashing plain 'p' has unexpected format\n"); 335 failed_tests++; 336 } 337 } 338 339 static void __init 340 test_hashed(const char *fmt, const void *p) 341 { 342 char buf[PLAIN_BUF_SIZE]; 343 int ret; 344 345 /* 346 * No need to increase failed test counter since this is assumed 347 * to be called after plain(). 348 */ 349 ret = plain_hash_to_buffer(p, buf, PLAIN_BUF_SIZE); 350 if (ret) 351 return; 352 353 test(buf, fmt, p); 354 } 355 356 /* 357 * NULL pointers aren't hashed. 358 */ 359 static void __init 360 null_pointer(void) 361 { 362 test(ZEROS "00000000", "%p", NULL); 363 test(ZEROS "00000000", "%px", NULL); 364 test("(null)", "%pE", NULL); 365 } 366 367 /* 368 * Error pointers aren't hashed. 369 */ 370 static void __init 371 error_pointer(void) 372 { 373 test(ONES "fffffff5", "%p", ERR_PTR(-11)); 374 test(ONES "fffffff5", "%px", ERR_PTR(-11)); 375 test("(efault)", "%pE", ERR_PTR(-11)); 376 } 377 378 #define PTR_INVALID ((void *)0x000000ab) 379 380 static void __init 381 invalid_pointer(void) 382 { 383 test_hashed("%p", PTR_INVALID); 384 test(ZEROS "000000ab", "%px", PTR_INVALID); 385 test("(efault)", "%pE", PTR_INVALID); 386 } 387 388 static void __init 389 symbol_ptr(void) 390 { 391 } 392 393 static void __init 394 kernel_ptr(void) 395 { 396 /* We can't test this without access to kptr_restrict. */ 397 } 398 399 static void __init 400 struct_resource(void) 401 { 402 } 403 404 static void __init 405 addr(void) 406 { 407 } 408 409 static void __init 410 escaped_str(void) 411 { 412 } 413 414 static void __init 415 hex_string(void) 416 { 417 const char buf[3] = {0xc0, 0xff, 0xee}; 418 419 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee", 420 "%3ph|%3phC|%3phD|%3phN", buf, buf, buf, buf); 421 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee", 422 "%*ph|%*phC|%*phD|%*phN", 3, buf, 3, buf, 3, buf, 3, buf); 423 } 424 425 static void __init 426 mac(void) 427 { 428 const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05}; 429 430 test("2d:48:d6:fc:7a:05", "%pM", addr); 431 test("05:7a:fc:d6:48:2d", "%pMR", addr); 432 test("2d-48-d6-fc-7a-05", "%pMF", addr); 433 test("2d48d6fc7a05", "%pm", addr); 434 test("057afcd6482d", "%pmR", addr); 435 } 436 437 static void __init 438 ip4(void) 439 { 440 struct sockaddr_in sa; 441 442 sa.sin_family = AF_INET; 443 sa.sin_port = cpu_to_be16(12345); 444 sa.sin_addr.s_addr = cpu_to_be32(0x7f000001); 445 446 test("127.000.000.001|127.0.0.1", "%pi4|%pI4", &sa.sin_addr, &sa.sin_addr); 447 test("127.000.000.001|127.0.0.1", "%piS|%pIS", &sa, &sa); 448 sa.sin_addr.s_addr = cpu_to_be32(0x01020304); 449 test("001.002.003.004:12345|1.2.3.4:12345", "%piSp|%pISp", &sa, &sa); 450 } 451 452 static void __init 453 ip6(void) 454 { 455 } 456 457 static void __init 458 ip(void) 459 { 460 ip4(); 461 ip6(); 462 } 463 464 static void __init 465 uuid(void) 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] __initdata = { 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 __init 492 dentry(void) 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 __init 513 struct_va_format(void) 514 { 515 } 516 517 static void __init 518 time_and_date(void) 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; 531 532 test("(%pt?)", "%pt", &tm); 533 test("2018-11-26T05:35:43", "%ptR", &tm); 534 test("0118-10-26T05:35:43", "%ptRr", &tm); 535 test("05:35:43|2018-11-26", "%ptRt|%ptRd", &tm, &tm); 536 test("05:35:43|0118-10-26", "%ptRtr|%ptRdr", &tm, &tm); 537 test("05:35:43|2018-11-26", "%ptRttr|%ptRdtr", &tm, &tm); 538 test("05:35:43 tr|2018-11-26 tr", "%ptRt tr|%ptRd tr", &tm, &tm); 539 540 test("2019-01-04T15:32:23", "%ptT", &t); 541 test("0119-00-04T15:32:23", "%ptTr", &t); 542 test("15:32:23|2019-01-04", "%ptTt|%ptTd", &t, &t); 543 test("15:32:23|0119-00-04", "%ptTtr|%ptTdr", &t, &t); 544 545 test("2019-01-04 15:32:23", "%ptTs", &t); 546 test("0119-00-04 15:32:23", "%ptTsr", &t); 547 test("15:32:23|2019-01-04", "%ptTts|%ptTds", &t, &t); 548 test("15:32:23|0119-00-04", "%ptTtrs|%ptTdrs", &t, &t); 549 } 550 551 static void __init 552 struct_clk(void) 553 { 554 } 555 556 static void __init 557 large_bitmap(void) 558 { 559 const int nbits = 1 << 16; 560 unsigned long *bits = bitmap_zalloc(nbits, GFP_KERNEL); 561 if (!bits) 562 return; 563 564 bitmap_set(bits, 1, 20); 565 bitmap_set(bits, 60000, 15); 566 test("1-20,60000-60014", "%*pbl", nbits, bits); 567 bitmap_free(bits); 568 } 569 570 static void __init 571 bitmap(void) 572 { 573 DECLARE_BITMAP(bits, 20); 574 const int primes[] = {2,3,5,7,11,13,17,19}; 575 int i; 576 577 bitmap_zero(bits, 20); 578 test("00000|00000", "%20pb|%*pb", bits, 20, bits); 579 test("|", "%20pbl|%*pbl", bits, 20, bits); 580 581 for (i = 0; i < ARRAY_SIZE(primes); ++i) 582 set_bit(primes[i], bits); 583 test("a28ac|a28ac", "%20pb|%*pb", bits, 20, bits); 584 test("2-3,5,7,11,13,17,19|2-3,5,7,11,13,17,19", "%20pbl|%*pbl", bits, 20, bits); 585 586 bitmap_fill(bits, 20); 587 test("fffff|fffff", "%20pb|%*pb", bits, 20, bits); 588 test("0-19|0-19", "%20pbl|%*pbl", bits, 20, bits); 589 590 large_bitmap(); 591 } 592 593 static void __init 594 netdev_features(void) 595 { 596 } 597 598 struct page_flags_test { 599 int width; 600 int shift; 601 int mask; 602 const char *fmt; 603 const char *name; 604 }; 605 606 static const struct page_flags_test pft[] = { 607 {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK, 608 "%d", "section"}, 609 {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK, 610 "%d", "node"}, 611 {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK, 612 "%d", "zone"}, 613 {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK, 614 "%#x", "lastcpupid"}, 615 {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK, 616 "%#x", "kasantag"}, 617 }; 618 619 static void __init 620 page_flags_test(int section, int node, int zone, int last_cpupid, 621 int kasan_tag, unsigned long flags, const char *name, 622 char *cmp_buf) 623 { 624 unsigned long values[] = {section, node, zone, last_cpupid, kasan_tag}; 625 unsigned long size; 626 bool append = false; 627 int i; 628 629 for (i = 0; i < ARRAY_SIZE(values); i++) 630 flags |= (values[i] & pft[i].mask) << pft[i].shift; 631 632 size = scnprintf(cmp_buf, BUF_SIZE, "%#lx(", flags); 633 if (flags & PAGEFLAGS_MASK) { 634 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s", name); 635 append = true; 636 } 637 638 for (i = 0; i < ARRAY_SIZE(pft); i++) { 639 if (!pft[i].width) 640 continue; 641 642 if (append) 643 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "|"); 644 645 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s=", 646 pft[i].name); 647 size += scnprintf(cmp_buf + size, BUF_SIZE - size, pft[i].fmt, 648 values[i] & pft[i].mask); 649 append = true; 650 } 651 652 snprintf(cmp_buf + size, BUF_SIZE - size, ")"); 653 654 test(cmp_buf, "%pGp", &flags); 655 } 656 657 static void __init 658 flags(void) 659 { 660 unsigned long flags; 661 char *cmp_buffer; 662 gfp_t gfp; 663 664 cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL); 665 if (!cmp_buffer) 666 return; 667 668 flags = 0; 669 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer); 670 671 flags = 1UL << NR_PAGEFLAGS; 672 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer); 673 674 flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru 675 | 1UL << PG_active | 1UL << PG_swapbacked; 676 page_flags_test(1, 1, 1, 0x1fffff, 1, flags, 677 "uptodate|dirty|lru|active|swapbacked", 678 cmp_buffer); 679 680 flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC; 681 test("read|exec|mayread|maywrite|mayexec", "%pGv", &flags); 682 683 gfp = GFP_TRANSHUGE; 684 test("GFP_TRANSHUGE", "%pGg", &gfp); 685 686 gfp = GFP_ATOMIC|__GFP_DMA; 687 test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp); 688 689 gfp = __GFP_ATOMIC; 690 test("__GFP_ATOMIC", "%pGg", &gfp); 691 692 /* Any flags not translated by the table should remain numeric */ 693 gfp = ~__GFP_BITS_MASK; 694 snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp); 695 test(cmp_buffer, "%pGg", &gfp); 696 697 snprintf(cmp_buffer, BUF_SIZE, "__GFP_ATOMIC|%#lx", 698 (unsigned long) gfp); 699 gfp |= __GFP_ATOMIC; 700 test(cmp_buffer, "%pGg", &gfp); 701 702 kfree(cmp_buffer); 703 } 704 705 static void __init fwnode_pointer(void) 706 { 707 const struct software_node softnodes[] = { 708 { .name = "first", }, 709 { .name = "second", .parent = &softnodes[0], }, 710 { .name = "third", .parent = &softnodes[1], }, 711 { NULL /* Guardian */ } 712 }; 713 const char * const full_name = "first/second/third"; 714 const char * const full_name_second = "first/second"; 715 const char * const second_name = "second"; 716 const char * const third_name = "third"; 717 int rval; 718 719 rval = software_node_register_nodes(softnodes); 720 if (rval) { 721 pr_warn("cannot register softnodes; rval %d\n", rval); 722 return; 723 } 724 725 test(full_name_second, "%pfw", software_node_fwnode(&softnodes[1])); 726 test(full_name, "%pfw", software_node_fwnode(&softnodes[2])); 727 test(full_name, "%pfwf", software_node_fwnode(&softnodes[2])); 728 test(second_name, "%pfwP", software_node_fwnode(&softnodes[1])); 729 test(third_name, "%pfwP", software_node_fwnode(&softnodes[2])); 730 731 software_node_unregister_nodes(softnodes); 732 } 733 734 static void __init fourcc_pointer(void) 735 { 736 struct { 737 u32 code; 738 char *str; 739 } const try[] = { 740 { 0x3231564e, "NV12 little-endian (0x3231564e)", }, 741 { 0xb231564e, "NV12 big-endian (0xb231564e)", }, 742 { 0x10111213, ".... little-endian (0x10111213)", }, 743 { 0x20303159, "Y10 little-endian (0x20303159)", }, 744 }; 745 unsigned int i; 746 747 for (i = 0; i < ARRAY_SIZE(try); i++) 748 test(try[i].str, "%p4cc", &try[i].code); 749 } 750 751 static void __init 752 errptr(void) 753 { 754 test("-1234", "%pe", ERR_PTR(-1234)); 755 756 /* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */ 757 BUILD_BUG_ON(IS_ERR(PTR)); 758 test_hashed("%pe", PTR); 759 760 #ifdef CONFIG_SYMBOLIC_ERRNAME 761 test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK)); 762 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN)); 763 BUILD_BUG_ON(EAGAIN != EWOULDBLOCK); 764 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK)); 765 test("[-EIO ]", "[%-8pe]", ERR_PTR(-EIO)); 766 test("[ -EIO]", "[%8pe]", ERR_PTR(-EIO)); 767 test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER)); 768 #endif 769 } 770 771 static void __init 772 test_pointer(void) 773 { 774 plain(); 775 null_pointer(); 776 error_pointer(); 777 invalid_pointer(); 778 symbol_ptr(); 779 kernel_ptr(); 780 struct_resource(); 781 addr(); 782 escaped_str(); 783 hex_string(); 784 mac(); 785 ip(); 786 uuid(); 787 dentry(); 788 struct_va_format(); 789 time_and_date(); 790 struct_clk(); 791 bitmap(); 792 netdev_features(); 793 flags(); 794 errptr(); 795 fwnode_pointer(); 796 fourcc_pointer(); 797 } 798 799 static void __init selftest(void) 800 { 801 alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL); 802 if (!alloced_buffer) 803 return; 804 test_buffer = alloced_buffer + PAD_SIZE; 805 806 test_basic(); 807 test_number(); 808 test_string(); 809 test_pointer(); 810 811 kfree(alloced_buffer); 812 } 813 814 KSTM_MODULE_LOADERS(test_printf); 815 MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>"); 816 MODULE_LICENSE("GPL"); 817