projects/linux·blob v6.2-rc7 · refs

802 lines · 18.8 KiB

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
39KSTM_MODULE_GLOBALS();
40
41static char *test_buffer __initdata;
42static char *alloced_buffer __initdata;
43
44extern bool no_hash_pointers;
45
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
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
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
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 = get_random_u32_inclusive(1, 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
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);
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}
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");
190 test("1234 ", "%-10.4s", "123456");
191 test(" 1234", "%10.4s", "123456");
192 /*
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.
204 */
205 test(" ", "%4.*s", -5, "123456");
206 test("123456", "%.s", "123456");
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
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
216#define PTR ((void *)0xffff0123456789abUL)
217#define PTR_STR "ffff0123456789ab"
218#define PTR_VAL_NO_CRNG "(____ptrval____)"
219#define ZEROS "00000000" /* hex 32 zero bits */
220#define ONES "ffffffff" /* hex 32 one bits */
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
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)
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"
250#define PTR_VAL_NO_CRNG "(ptrval)"
251#define ZEROS ""
252#define ONES ""
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
264plain_hash_to_buffer(const void *p, char *buf, size_t len)
265{
266 int nchars;
267
268 nchars = snprintf(buf, len, "%p", p);
269
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
279 return 0;
280}
281
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
292 if (strncmp(buf, PTR_STR, PTR_WIDTH) == 0)
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 */
302static void __init
303plain(void)
304{
305 int err;
306
307 if (no_hash_pointers) {
308 pr_warn("skipping plain 'p' tests");
309 skipped_tests += 2;
310 return;
311 }
312
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 }
325}
326
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
344/*
345 * NULL pointers aren't hashed.
346 */
347static void __init
348null_pointer(void)
349{
350 test(ZEROS "00000000", "%p", NULL);
351 test(ZEROS "00000000", "%px", NULL);
352 test("(null)", "%pE", NULL);
353}
354
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
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
376static void __init
377symbol_ptr(void)
378{
379}
380
381static void __init
382kernel_ptr(void)
383{
384 /* We can't test this without access to kptr_restrict. */
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
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
479static void __init
480dentry(void)
481{
482 test("foo", "%pd", &test_dentry[0]);
483 test("foo", "%pd2", &test_dentry[0]);
484
485 test("(null)", "%pd", NULL);
486 test("(efault)", "%pd", PTR_INVALID);
487 test("(null)", "%pD", NULL);
488 test("(efault)", "%pD", PTR_INVALID);
489
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]);
498}
499
500static void __init
501struct_va_format(void)
502{
503}
504
505static void __init
506time_and_date(void)
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 };
517 /* 2019-01-04T15:32:23 */
518 time64_t t = 1546615943;
519
520 test("(%pt?)", "%pt", &tm);
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);
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);
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);
537}
538
539static void __init
540struct_clk(void)
541{
542}
543
544static void __init
545large_bitmap(void)
546{
547 const int nbits = 1 << 16;
548 unsigned long *bits = bitmap_zalloc(nbits, GFP_KERNEL);
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);
555 bitmap_free(bits);
556}
557
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);
577
578 large_bitmap();
579}
580
581static void __init
582netdev_features(void)
583{
584}
585
586struct page_flags_test {
587 int width;
588 int shift;
589 int mask;
590 const char *fmt;
591 const char *name;
592};
593
594static const struct page_flags_test pft[] = {
595 {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK,
596 "%d", "section"},
597 {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK,
598 "%d", "node"},
599 {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK,
600 "%d", "zone"},
601 {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK,
602 "%#x", "lastcpupid"},
603 {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK,
604 "%#x", "kasantag"},
605};
606
607static void __init
608page_flags_test(int section, int node, int zone, int last_cpupid,
609 int kasan_tag, unsigned long flags, const char *name,
610 char *cmp_buf)
611{
612 unsigned long values[] = {section, node, zone, last_cpupid, kasan_tag};
613 unsigned long size;
614 bool append = false;
615 int i;
616
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);
621 if (flags & PAGEFLAGS_MASK) {
622 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s", name);
623 append = true;
624 }
625
626 for (i = 0; i < ARRAY_SIZE(pft); i++) {
627 if (!pft[i].width)
628 continue;
629
630 if (append)
631 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "|");
632
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);
637 append = true;
638 }
639
640 snprintf(cmp_buf + size, BUF_SIZE - size, ")");
641
642 test(cmp_buf, "%pGp", &flags);
643}
644
645static void __init
646flags(void)
647{
648 unsigned long flags;
649 char *cmp_buffer;
650 gfp_t gfp;
651
652 cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL);
653 if (!cmp_buffer)
654 return;
655
656 flags = 0;
657 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);
658
659 flags = 1UL << NR_PAGEFLAGS;
660 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);
661
662 flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru
663 | 1UL << PG_active | 1UL << PG_swapbacked;
664 page_flags_test(1, 1, 1, 0x1fffff, 1, flags,
665 "uptodate|dirty|lru|active|swapbacked",
666 cmp_buffer);
667
668 flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;
669 test("read|exec|mayread|maywrite|mayexec", "%pGv", &flags);
670
671 gfp = GFP_TRANSHUGE;
672 test("GFP_TRANSHUGE", "%pGg", &gfp);
673
674 gfp = GFP_ATOMIC|__GFP_DMA;
675 test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp);
676
677 gfp = __GFP_ATOMIC;
678 test("__GFP_ATOMIC", "%pGg", &gfp);
679
680 /* Any flags not translated by the table should remain numeric */
681 gfp = ~__GFP_BITS_MASK;
682 snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp);
683 test(cmp_buffer, "%pGg", &gfp);
684
685 snprintf(cmp_buffer, BUF_SIZE, "__GFP_ATOMIC|%#lx",
686 (unsigned long) gfp);
687 gfp |= __GFP_ATOMIC;
688 test(cmp_buffer, "%pGg", &gfp);
689
690 kfree(cmp_buffer);
691}
692
693static void __init fwnode_pointer(void)
694{
695 const struct software_node first = { .name = "first" };
696 const struct software_node second = { .name = "second", .parent = &first };
697 const struct software_node third = { .name = "third", .parent = &second };
698 const struct software_node *group[] = { &first, &second, &third, NULL };
699 const char * const full_name_second = "first/second";
700 const char * const full_name_third = "first/second/third";
701 const char * const second_name = "second";
702 const char * const third_name = "third";
703 int rval;
704
705 rval = software_node_register_node_group(group);
706 if (rval) {
707 pr_warn("cannot register softnodes; rval %d\n", rval);
708 return;
709 }
710
711 test(full_name_second, "%pfw", software_node_fwnode(&second));
712 test(full_name_third, "%pfw", software_node_fwnode(&third));
713 test(full_name_third, "%pfwf", software_node_fwnode(&third));
714 test(second_name, "%pfwP", software_node_fwnode(&second));
715 test(third_name, "%pfwP", software_node_fwnode(&third));
716
717 software_node_unregister_node_group(group);
718}
719
720static void __init fourcc_pointer(void)
721{
722 struct {
723 u32 code;
724 char *str;
725 } const try[] = {
726 { 0x3231564e, "NV12 little-endian (0x3231564e)", },
727 { 0xb231564e, "NV12 big-endian (0xb231564e)", },
728 { 0x10111213, ".... little-endian (0x10111213)", },
729 { 0x20303159, "Y10 little-endian (0x20303159)", },
730 };
731 unsigned int i;
732
733 for (i = 0; i < ARRAY_SIZE(try); i++)
734 test(try[i].str, "%p4cc", &try[i].code);
735}
736
737static void __init
738errptr(void)
739{
740 test("-1234", "%pe", ERR_PTR(-1234));
741
742 /* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */
743 BUILD_BUG_ON(IS_ERR(PTR));
744 test_hashed("%pe", PTR);
745
746#ifdef CONFIG_SYMBOLIC_ERRNAME
747 test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK));
748 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN));
749 BUILD_BUG_ON(EAGAIN != EWOULDBLOCK);
750 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK));
751 test("[-EIO ]", "[%-8pe]", ERR_PTR(-EIO));
752 test("[ -EIO]", "[%8pe]", ERR_PTR(-EIO));
753 test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER));
754#endif
755}
756
757static void __init
758test_pointer(void)
759{
760 plain();
761 null_pointer();
762 error_pointer();
763 invalid_pointer();
764 symbol_ptr();
765 kernel_ptr();
766 struct_resource();
767 addr();
768 escaped_str();
769 hex_string();
770 mac();
771 ip();
772 uuid();
773 dentry();
774 struct_va_format();
775 time_and_date();
776 struct_clk();
777 bitmap();
778 netdev_features();
779 flags();
780 errptr();
781 fwnode_pointer();
782 fourcc_pointer();
783}
784
785static void __init selftest(void)
786{
787 alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
788 if (!alloced_buffer)
789 return;
790 test_buffer = alloced_buffer + PAD_SIZE;
791
792 test_basic();
793 test_number();
794 test_string();
795 test_pointer();
796
797 kfree(alloced_buffer);
798}
799
800KSTM_MODULE_LOADERS(test_printf);
801MODULE_AUTHOR("Rasmus Villemoes <[email protected]>");
802MODULE_LICENSE("GPL");