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Merge tag 'for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pateldipen19...
[linux-block.git] / lib / test_printf.c
CommitLineData
09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
707cc728
RV		 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>
4d42c447 13#include <linux/rtc.h>
707cc728
RV		 14#include <linux/slab.h>
15#include <linux/string.h>
16
857cca4d 17#include <linux/bitmap.h>
251c7234 18#include <linux/dcache.h>
707cc728
RV		 19#include <linux/socket.h>
20#include <linux/in.h>
21
edf14cdb
VB		 22#include <linux/gfp.h>
23#include <linux/mm.h>
24
f1ce39df
SA		 25#include <linux/property.h>
26
6b1a4d5b
TH		 27#include "../tools/testing/selftests/kselftest_module.h"
28
707cc728 29#define BUF_SIZE 256
331e4deb 30#define PAD_SIZE 16
707cc728
RV		 31#define FILL_CHAR '$'
32
96dd9a2f
JS		 33#define NOWARN(option, comment, block) \
34 __diag_push(); \
35 __diag_ignore_all(#option, comment); \
36 block \
37 __diag_pop();
38
4e89a787
TT		 39KSTM_MODULE_GLOBALS();
40
707cc728 41static char *test_buffer __initdata;
331e4deb 42static char *alloced_buffer __initdata;
707cc728 43
5ead723a
TT		 44extern bool no_hash_pointers;
45
707cc728
RV		 46static int __printf(4, 0) __init
47do_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
331e4deb 55 memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE);
707cc728
RV		 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
331e4deb
RV		 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
707cc728 71 if (!bufsize) {
331e4deb 72 if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) {
707cc728
RV		 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
9a3bfa01 87 if (memchr_inv(test_buffer + written + 1, FILL_CHAR, bufsize - (written + 1))) {
331e4deb
RV		 88 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n",
89 bufsize, fmt);
90 return 1;
91 }
92
9a3bfa01
RV		 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
707cc728
RV		 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
106static 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
fd0515d5
RV		 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 }
707cc728
RV		 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);
e8a533cb 129 rand = get_random_u32_inclusive(1, elen + 1);
707cc728
RV		 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) {
b79a7db3 136 total_tests++;
707cc728
RV		 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
150static void __init
151test_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
162static void __init
163test_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);
96dd9a2f
JS		 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 })
1ca8e8eb
RV		 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);
707cc728
RV		 182}
183
184static void __init
185test_string(void)
186{
187 test("", "%s%.0s", "", "123");
188 test("ABCD|abc|123", "%s|%.3s|%.*s", "ABCD", "abcdef", 3, "123456");
189 test("1 | 2|3 | 4|5 ", "%-3s|%3s|%-*s|%*s|%*s", "1", "2", 3, "3", 3, "4", -3, "5");
f176eb4c
RV		 190 test("1234 ", "%-10.4s", "123456");
191 test(" 1234", "%10.4s", "123456");
707cc728 192 /*
f176eb4c
RV		 193 * POSIX and C99 say that a negative precision (which is only
194 * possible to pass via a * argument) should be treated as if
195 * the precision wasn't present, and that if the precision is
196 * omitted (as in %.s), the precision should be taken to be
197 * 0. However, the kernel's printf behave exactly opposite,
198 * treating a negative precision as 0 and treating an omitted
199 * precision specifier as if no precision was given.
200 *
201 * These test cases document the current behaviour; should
202 * anyone ever feel the need to follow the standards more
203 * closely, this can be revisited.
707cc728 204 */
f176eb4c
RV		 205 test(" ", "%4.*s", -5, "123456");
206 test("123456", "%.s", "123456");
707cc728
RV		 207 test("a||", "%.s|%.0s|%.*s", "a", "b", 0, "c");
208 test("a | | ", "%-3.s|%-3.0s|%-3.*s", "a", "b", 0, "c");
209}
210
ad67b74d
TH		 211#define PLAIN_BUF_SIZE 64 /* leave some space so we don't oops */
212
213#if BITS_PER_LONG == 64
214
215#define PTR_WIDTH 16
c604b407 216#define PTR ((void *)0xffff0123456789abUL)
ad67b74d 217#define PTR_STR "ffff0123456789ab"
ce041c43 218#define PTR_VAL_NO_CRNG "(____ptrval____)"
ad67b74d 219#define ZEROS "00000000" /* hex 32 zero bits */
7bd57fbc 220#define ONES "ffffffff" /* hex 32 one bits */
ad67b74d
TH		 221
222static int __init
223plain_format(void)
224{
225 char buf[PLAIN_BUF_SIZE];
226 int nchars;
227
228 nchars = snprintf(buf, PLAIN_BUF_SIZE, "%p", PTR);
229
ce041c43
TE		 230 if (nchars != PTR_WIDTH)
231 return -1;
232
233 if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
234 pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
235 PTR_VAL_NO_CRNG);
236 return 0;
237 }
238
239 if (strncmp(buf, ZEROS, strlen(ZEROS)) != 0)
ad67b74d
TH		 240 return -1;
241
242 return 0;
243}
244
245#else
246
247#define PTR_WIDTH 8
248#define PTR ((void *)0x456789ab)
249#define PTR_STR "456789ab"
ce041c43 250#define PTR_VAL_NO_CRNG "(ptrval)"
3e5903eb 251#define ZEROS ""
7bd57fbc 252#define ONES ""
ad67b74d
TH		 253
254static int __init
255plain_format(void)
256{
257 /* Format is implicitly tested for 32 bit machines by plain_hash() */
258 return 0;
259}
260
261#endif /* BITS_PER_LONG == 64 */
262
263static int __init
4d42c447 264plain_hash_to_buffer(const void *p, char *buf, size_t len)
ad67b74d 265{
ad67b74d
TH		 266 int nchars;
267
4d42c447 268 nchars = snprintf(buf, len, "%p", p);
ad67b74d 269
ce041c43
TE		 270 if (nchars != PTR_WIDTH)
271 return -1;
272
273 if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
274 pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
275 PTR_VAL_NO_CRNG);
276 return 0;
277 }
278
4d42c447
AS		 279 return 0;
280}
281
4d42c447
AS		 282static int __init
283plain_hash(void)
284{
285 char buf[PLAIN_BUF_SIZE];
286 int ret;
287
288 ret = plain_hash_to_buffer(PTR, buf, PLAIN_BUF_SIZE);
289 if (ret)
290 return ret;
291
ce041c43 292 if (strncmp(buf, PTR_STR, PTR_WIDTH) == 0)
ad67b74d
TH		 293 return -1;
294
295 return 0;
296}
297
298/*
299 * We can't use test() to test %p because we don't know what output to expect
300 * after an address is hashed.
301 */
707cc728
RV		 302static void __init
303plain(void)
304{
ad67b74d 305 int err;
707cc728 306
5ead723a
TT		 307 if (no_hash_pointers) {
308 pr_warn("skipping plain 'p' tests");
309 skipped_tests += 2;
310 return;
311 }
312
ad67b74d
TH		 313 err = plain_hash();
314 if (err) {
315 pr_warn("plain 'p' does not appear to be hashed\n");
316 failed_tests++;
317 return;
318 }
319
320 err = plain_format();
321 if (err) {
322 pr_warn("hashing plain 'p' has unexpected format\n");
323 failed_tests++;
324 }
707cc728
RV		 325}
326
4d42c447
AS		 327static void __init
328test_hashed(const char *fmt, const void *p)
329{
330 char buf[PLAIN_BUF_SIZE];
331 int ret;
332
333 /*
334 * No need to increase failed test counter since this is assumed
335 * to be called after plain().
336 */
337 ret = plain_hash_to_buffer(p, buf, PLAIN_BUF_SIZE);
338 if (ret)
339 return;
340
341 test(buf, fmt, p);
342}
343
7bd57fbc
ID		 344/*
345 * NULL pointers aren't hashed.
346 */
3e5903eb
PM		 347static void __init
348null_pointer(void)
349{
7bd57fbc 350 test(ZEROS "00000000", "%p", NULL);
3e5903eb
PM		 351 test(ZEROS "00000000", "%px", NULL);
352 test("(null)", "%pE", NULL);
353}
354
7bd57fbc
ID		 355/*
356 * Error pointers aren't hashed.
357 */
358static void __init
359error_pointer(void)
360{
361 test(ONES "fffffff5", "%p", ERR_PTR(-11));
362 test(ONES "fffffff5", "%px", ERR_PTR(-11));
363 test("(efault)", "%pE", ERR_PTR(-11));
364}
365
3e5903eb
PM		 366#define PTR_INVALID ((void *)0x000000ab)
367
368static void __init
369invalid_pointer(void)
370{
371 test_hashed("%p", PTR_INVALID);
372 test(ZEROS "000000ab", "%px", PTR_INVALID);
373 test("(efault)", "%pE", PTR_INVALID);
374}
375
707cc728
RV		 376static void __init
377symbol_ptr(void)
378{
379}
380
381static void __init
382kernel_ptr(void)
383{
ad67b74d 384 /* We can't test this without access to kptr_restrict. */
707cc728
RV		 385}
386
387static void __init
388struct_resource(void)
389{
390}
391
392static void __init
393addr(void)
394{
395}
396
397static void __init
398escaped_str(void)
399{
400}
401
402static void __init
403hex_string(void)
404{
405 const char buf[3] = {0xc0, 0xff, 0xee};
406
407 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",
408 "%3ph|%3phC|%3phD|%3phN", buf, buf, buf, buf);
409 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",
410 "%*ph|%*phC|%*phD|%*phN", 3, buf, 3, buf, 3, buf, 3, buf);
411}
412
413static void __init
414mac(void)
415{
416 const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05};
417
418 test("2d:48:d6:fc:7a:05", "%pM", addr);
419 test("05:7a:fc:d6:48:2d", "%pMR", addr);
420 test("2d-48-d6-fc-7a-05", "%pMF", addr);
421 test("2d48d6fc7a05", "%pm", addr);
422 test("057afcd6482d", "%pmR", addr);
423}
424
425static void __init
426ip4(void)
427{
428 struct sockaddr_in sa;
429
430 sa.sin_family = AF_INET;
431 sa.sin_port = cpu_to_be16(12345);
432 sa.sin_addr.s_addr = cpu_to_be32(0x7f000001);
433
434 test("127.000.000.001|127.0.0.1", "%pi4|%pI4", &sa.sin_addr, &sa.sin_addr);
435 test("127.000.000.001|127.0.0.1", "%piS|%pIS", &sa, &sa);
436 sa.sin_addr.s_addr = cpu_to_be32(0x01020304);
437 test("001.002.003.004:12345|1.2.3.4:12345", "%piSp|%pISp", &sa, &sa);
438}
439
440static void __init
441ip6(void)
442{
443}
444
445static void __init
446ip(void)
447{
448 ip4();
449 ip6();
450}
451
452static void __init
453uuid(void)
454{
455 const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
456 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};
457
458 test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid);
459 test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid);
460 test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid);
461 test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid);
462}
463
251c7234
RV		 464static struct dentry test_dentry[4] __initdata = {
465 { .d_parent = &test_dentry[0],
466 .d_name = QSTR_INIT(test_dentry[0].d_iname, 3),
467 .d_iname = "foo" },
468 { .d_parent = &test_dentry[0],
469 .d_name = QSTR_INIT(test_dentry[1].d_iname, 5),
470 .d_iname = "bravo" },
471 { .d_parent = &test_dentry[1],
472 .d_name = QSTR_INIT(test_dentry[2].d_iname, 4),
473 .d_iname = "alfa" },
474 { .d_parent = &test_dentry[2],
475 .d_name = QSTR_INIT(test_dentry[3].d_iname, 5),
476 .d_iname = "romeo" },
477};
478
707cc728
RV		 479static void __init
480dentry(void)
481{
251c7234
RV		 482 test("foo", "%pd", &test_dentry[0]);
483 test("foo", "%pd2", &test_dentry[0]);
484
cf6b7921
JH		 485 test("(null)", "%pd", NULL);
486 test("(efault)", "%pd", PTR_INVALID);
cf6b7921
JH		 487 test("(null)", "%pD", NULL);
488 test("(efault)", "%pD", PTR_INVALID);
489
251c7234
RV		 490 test("romeo", "%pd", &test_dentry[3]);
491 test("alfa/romeo", "%pd2", &test_dentry[3]);
492 test("bravo/alfa/romeo", "%pd3", &test_dentry[3]);
493 test("/bravo/alfa/romeo", "%pd4", &test_dentry[3]);
494 test("/bravo/alfa", "%pd4", &test_dentry[2]);
495
496 test("bravo/alfa |bravo/alfa ", "%-12pd2|%*pd2", &test_dentry[2], -12, &test_dentry[2]);
497 test(" bravo/alfa| bravo/alfa", "%12pd2|%*pd2", &test_dentry[2], 12, &test_dentry[2]);
707cc728
RV		 498}
499
500static void __init
501struct_va_format(void)
502{
503}
504
4d42c447 505static void __init
7daac5b2 506time_and_date(void)
4d42c447
AS		 507{
508 /* 1543210543 */
509 const struct rtc_time tm = {
510 .tm_sec = 43,
511 .tm_min = 35,
512 .tm_hour = 5,
513 .tm_mday = 26,
514 .tm_mon = 10,
515 .tm_year = 118,
516 };
7daac5b2
AS		 517 /* 2019-01-04T15:32:23 */
518 time64_t t = 1546615943;
4d42c447 519
7daac5b2 520 test("(%pt?)", "%pt", &tm);
4d42c447
AS		 521 test("2018-11-26T05:35:43", "%ptR", &tm);
522 test("0118-10-26T05:35:43", "%ptRr", &tm);
523 test("05:35:43|2018-11-26", "%ptRt|%ptRd", &tm, &tm);
524 test("05:35:43|0118-10-26", "%ptRtr|%ptRdr", &tm, &tm);
525 test("05:35:43|2018-11-26", "%ptRttr|%ptRdtr", &tm, &tm);
526 test("05:35:43 tr|2018-11-26 tr", "%ptRt tr|%ptRd tr", &tm, &tm);
7daac5b2
AS		 527
528 test("2019-01-04T15:32:23", "%ptT", &t);
529 test("0119-00-04T15:32:23", "%ptTr", &t);
530 test("15:32:23|2019-01-04", "%ptTt|%ptTd", &t, &t);
531 test("15:32:23|0119-00-04", "%ptTtr|%ptTdr", &t, &t);
20bc8c1e
AS		 532
533 test("2019-01-04 15:32:23", "%ptTs", &t);
534 test("0119-00-04 15:32:23", "%ptTsr", &t);
535 test("15:32:23|2019-01-04", "%ptTts|%ptTds", &t, &t);
536 test("15:32:23|0119-00-04", "%ptTtrs|%ptTdrs", &t, &t);
4d42c447
AS		 537}
538
707cc728
RV		 539static void __init
540struct_clk(void)
541{
542}
543
857cca4d
RV		 544static void __init
545large_bitmap(void)
546{
547 const int nbits = 1 << 16;
2821fd0c 548 unsigned long *bits = bitmap_zalloc(nbits, GFP_KERNEL);
857cca4d
RV		 549 if (!bits)
550 return;
551
552 bitmap_set(bits, 1, 20);
553 bitmap_set(bits, 60000, 15);
554 test("1-20,60000-60014", "%*pbl", nbits, bits);
2821fd0c 555 bitmap_free(bits);
857cca4d
RV		 556}
557
707cc728
RV		 558static void __init
559bitmap(void)
560{
561 DECLARE_BITMAP(bits, 20);
562 const int primes[] = {2,3,5,7,11,13,17,19};
563 int i;
564
565 bitmap_zero(bits, 20);
566 test("00000|00000", "%20pb|%*pb", bits, 20, bits);
567 test("|", "%20pbl|%*pbl", bits, 20, bits);
568
569 for (i = 0; i < ARRAY_SIZE(primes); ++i)
570 set_bit(primes[i], bits);
571 test("a28ac|a28ac", "%20pb|%*pb", bits, 20, bits);
572 test("2-3,5,7,11,13,17,19|2-3,5,7,11,13,17,19", "%20pbl|%*pbl", bits, 20, bits);
573
574 bitmap_fill(bits, 20);
575 test("fffff|fffff", "%20pb|%*pb", bits, 20, bits);
576 test("0-19|0-19", "%20pbl|%*pbl", bits, 20, bits);
857cca4d
RV		 577
578 large_bitmap();
707cc728
RV		 579}
580
581static void __init
582netdev_features(void)
583{
584}
585
c244297a
YS		 586struct page_flags_test {
587 int width;
588 int shift;
589 int mask;
c244297a
YS		 590 const char *fmt;
591 const char *name;
592};
593
c666d447 594static const struct page_flags_test pft[] = {
c244297a 595 {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK,
c666d447 596 "%d", "section"},
c244297a 597 {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK,
c666d447 598 "%d", "node"},
c244297a 599 {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK,
c666d447 600 "%d", "zone"},
c244297a 601 {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK,
c666d447 602 "%#x", "lastcpupid"},
c244297a 603 {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK,
c666d447 604 "%#x", "kasantag"},
c244297a
YS		 605};
606
607static void __init
608page_flags_test(int section, int node, int zone, int last_cpupid,
a25a0854
MWO		 609 int kasan_tag, unsigned long flags, const char *name,
610 char *cmp_buf)
c244297a
YS		 611{
612 unsigned long values[] = {section, node, zone, last_cpupid, kasan_tag};
23efd080 613 unsigned long size;
c244297a
YS		 614 bool append = false;
615 int i;
616
23efd080
MWO		 617 for (i = 0; i < ARRAY_SIZE(values); i++)
618 flags |= (values[i] & pft[i].mask) << pft[i].shift;
619
620 size = scnprintf(cmp_buf, BUF_SIZE, "%#lx(", flags);
a25a0854 621 if (flags & PAGEFLAGS_MASK) {
507f9860 622 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s", name);
5b358b0d 623 append = true;
c244297a
YS		 624 }
625
c244297a
YS		 626 for (i = 0; i < ARRAY_SIZE(pft); i++) {
627 if (!pft[i].width)
628 continue;
629
507f9860
MWO		 630 if (append)
631 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "|");
c244297a 632
507f9860
MWO		 633 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s=",
634 pft[i].name);
635 size += scnprintf(cmp_buf + size, BUF_SIZE - size, pft[i].fmt,
636 values[i] & pft[i].mask);
c244297a
YS		 637 append = true;
638 }
639
23efd080
MWO		 640 snprintf(cmp_buf + size, BUF_SIZE - size, ")");
641
a25a0854 642 test(cmp_buf, "%pGp", &flags);
c244297a
YS		 643}
644
4c85c0be
HY		 645static void __init page_type_test(unsigned int page_type, const char *name,
646 char *cmp_buf)
647{
648 unsigned long size;
649
650 size = scnprintf(cmp_buf, BUF_SIZE, "%#x(", page_type);
651 if (page_type_has_type(page_type))
652 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s", name);
653
654 snprintf(cmp_buf + size, BUF_SIZE - size, ")");
655 test(cmp_buf, "%pGt", &page_type);
656}
657
edf14cdb
VB		 658static void __init
659flags(void)
660{
661 unsigned long flags;
edf14cdb 662 char *cmp_buffer;
c244297a 663 gfp_t gfp;
4c85c0be 664 unsigned int page_type;
c244297a
YS		 665
666 cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL);
667 if (!cmp_buffer)
668 return;
edf14cdb
VB		 669
670 flags = 0;
c244297a 671 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);
edf14cdb 672
edf14cdb 673 flags = 1UL << NR_PAGEFLAGS;
c244297a 674 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);
edf14cdb
VB		 675
676 flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru
677 | 1UL << PG_active | 1UL << PG_swapbacked;
c244297a
YS		 678 page_flags_test(1, 1, 1, 0x1fffff, 1, flags,
679 "uptodate|dirty|lru|active|swapbacked",
680 cmp_buffer);
edf14cdb 681
8d0920bd
DH		 682 flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;
683 test("read|exec|mayread|maywrite|mayexec", "%pGv", &flags);
edf14cdb
VB		 684
685 gfp = GFP_TRANSHUGE;
686 test("GFP_TRANSHUGE", "%pGg", &gfp);
687
688 gfp = GFP_ATOMIC|__GFP_DMA;
689 test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp);
690
2973d822
N		 691 gfp = __GFP_HIGH;
692 test("__GFP_HIGH", "%pGg", &gfp);
edf14cdb 693
edf14cdb
VB		 694 /* Any flags not translated by the table should remain numeric */
695 gfp = ~__GFP_BITS_MASK;
696 snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp);
697 test(cmp_buffer, "%pGg", &gfp);
698
2973d822 699 snprintf(cmp_buffer, BUF_SIZE, "__GFP_HIGH|%#lx",
edf14cdb 700 (unsigned long) gfp);
2973d822 701 gfp |= __GFP_HIGH;
edf14cdb
VB		 702 test(cmp_buffer, "%pGg", &gfp);
703
4c85c0be
HY		 704 page_type = ~0;
705 page_type_test(page_type, "", cmp_buffer);
706
707 page_type = 10;
708 page_type_test(page_type, "", cmp_buffer);
709
710 page_type = ~PG_buddy;
711 page_type_test(page_type, "buddy", cmp_buffer);
712
713 page_type = ~(PG_table | PG_buddy);
714 page_type_test(page_type, "table|buddy", cmp_buffer);
715
edf14cdb
VB		 716 kfree(cmp_buffer);
717}
718
f1ce39df
SA		 719static void __init fwnode_pointer(void)
720{
fd070e8c
AS		 721 const struct software_node first = { .name = "first" };
722 const struct software_node second = { .name = "second", .parent = &first };
723 const struct software_node third = { .name = "third", .parent = &second };
724 const struct software_node *group[] = { &first, &second, &third, NULL };
f1ce39df 725 const char * const full_name_second = "first/second";
fd070e8c 726 const char * const full_name_third = "first/second/third";
f1ce39df
SA		 727 const char * const second_name = "second";
728 const char * const third_name = "third";
729 int rval;
730
fd070e8c 731 rval = software_node_register_node_group(group);
f1ce39df
SA		 732 if (rval) {
733 pr_warn("cannot register softnodes; rval %d\n", rval);
734 return;
735 }
736
fd070e8c
AS		 737 test(full_name_second, "%pfw", software_node_fwnode(&second));
738 test(full_name_third, "%pfw", software_node_fwnode(&third));
739 test(full_name_third, "%pfwf", software_node_fwnode(&third));
740 test(second_name, "%pfwP", software_node_fwnode(&second));
741 test(third_name, "%pfwP", software_node_fwnode(&third));
f1ce39df 742
fd070e8c 743 software_node_unregister_node_group(group);
f1ce39df
SA		 744}
745
af612e43
SA		 746static void __init fourcc_pointer(void)
747{
748 struct {
749 u32 code;
750 char *str;
751 } const try[] = {
752 { 0x3231564e, "NV12 little-endian (0x3231564e)", },
753 { 0xb231564e, "NV12 big-endian (0xb231564e)", },
754 { 0x10111213, ".... little-endian (0x10111213)", },
755 { 0x20303159, "Y10 little-endian (0x20303159)", },
756 };
757 unsigned int i;
758
759 for (i = 0; i < ARRAY_SIZE(try); i++)
760 test(try[i].str, "%p4cc", &try[i].code);
761}
762
57f5677e
RV		 763static void __init
764errptr(void)
765{
766 test("-1234", "%pe", ERR_PTR(-1234));
767
768 /* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */
769 BUILD_BUG_ON(IS_ERR(PTR));
770 test_hashed("%pe", PTR);
771
772#ifdef CONFIG_SYMBOLIC_ERRNAME
773 test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK));
774 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN));
775 BUILD_BUG_ON(EAGAIN != EWOULDBLOCK);
776 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK));
777 test("[-EIO ]", "[%-8pe]", ERR_PTR(-EIO));
778 test("[ -EIO]", "[%8pe]", ERR_PTR(-EIO));
779 test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER));
780#endif
781}
782
707cc728
RV		 783static void __init
784test_pointer(void)
785{
786 plain();
3e5903eb 787 null_pointer();
7bd57fbc 788 error_pointer();
3e5903eb 789 invalid_pointer();
707cc728
RV		 790 symbol_ptr();
791 kernel_ptr();
792 struct_resource();
793 addr();
794 escaped_str();
795 hex_string();
796 mac();
797 ip();
798 uuid();
799 dentry();
800 struct_va_format();
7daac5b2 801 time_and_date();
707cc728
RV		 802 struct_clk();
803 bitmap();
804 netdev_features();
edf14cdb 805 flags();
57f5677e 806 errptr();
f1ce39df 807 fwnode_pointer();
af612e43 808 fourcc_pointer();
707cc728
RV		 809}
810
6b1a4d5b 811static void __init selftest(void)
707cc728 812{
331e4deb
RV		 813 alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
814 if (!alloced_buffer)
6b1a4d5b 815 return;
331e4deb 816 test_buffer = alloced_buffer + PAD_SIZE;
707cc728
RV		 817
818 test_basic();
819 test_number();
820 test_string();
821 test_pointer();
822
331e4deb 823 kfree(alloced_buffer);
707cc728
RV		 824}
825
6b1a4d5b 826KSTM_MODULE_LOADERS(test_printf);
707cc728
RV		 827MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");
828MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)