[linux-block.git] / lib / test_printf.c

/*
 * Test cases for printf facility.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/printk.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/string.h>

#include <linux/socket.h>
#include <linux/in.h>

#define BUF_SIZE 256
#define PAD_SIZE 16
#define FILL_CHAR '$'

#define PTR1 ((void*)0x01234567)
#define PTR2 ((void*)(long)(int)0xfedcba98)

#if BITS_PER_LONG == 64
#define PTR1_ZEROES "000000000"
#define PTR1_SPACES "         "
#define PTR1_STR "1234567"
#define PTR2_STR "fffffffffedcba98"
#define PTR_WIDTH 16
#else
#define PTR1_ZEROES "0"
#define PTR1_SPACES " "
#define PTR1_STR "1234567"
#define PTR2_STR "fedcba98"
#define PTR_WIDTH 8
#endif
#define PTR_WIDTH_STR stringify(PTR_WIDTH)

static unsigned total_tests __initdata;
static unsigned failed_tests __initdata;
static char *test_buffer __initdata;
static char *alloced_buffer __initdata;

static int __printf(4, 0) __init
do_test(int bufsize, const char *expect, int elen,
	const char *fmt, va_list ap)
{
	va_list aq;
	int ret, written;

	total_tests++;

	memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE);
	va_copy(aq, ap);
	ret = vsnprintf(test_buffer, bufsize, fmt, aq);
	va_end(aq);

	if (ret != elen) {
		pr_warn("vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n",
			bufsize, fmt, ret, elen);
		return 1;
	}

	if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) {
		pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", bufsize, fmt);
		return 1;
	}

	if (!bufsize) {
		if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) {
			pr_warn("vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n",
				fmt);
			return 1;
		}
		return 0;
	}

	written = min(bufsize-1, elen);
	if (test_buffer[written]) {
		pr_warn("vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n",
			bufsize, fmt);
		return 1;
	}

	if (memchr_inv(test_buffer + written + 1, FILL_CHAR, BUF_SIZE + PAD_SIZE - (written + 1))) {
		pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n",
			bufsize, fmt);
		return 1;
	}

	if (memcmp(test_buffer, expect, written)) {
		pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n",
			bufsize, fmt, test_buffer, written, expect);
		return 1;
	}
	return 0;
}

static void __printf(3, 4) __init
__test(const char *expect, int elen, const char *fmt, ...)
{
	va_list ap;
	int rand;
	char *p;

	if (elen >= BUF_SIZE) {
		pr_err("error in test suite: expected output length %d too long. Format was '%s'.\n",
		       elen, fmt);
		failed_tests++;
		return;
	}

	va_start(ap, fmt);

	/*
	 * Every fmt+args is subjected to four tests: Three where we
	 * tell vsnprintf varying buffer sizes (plenty, not quite
	 * enough and 0), and then we also test that kvasprintf would
	 * be able to print it as expected.
	 */
	failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap);
	rand = 1 + prandom_u32_max(elen+1);
	/* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */
	failed_tests += do_test(rand, expect, elen, fmt, ap);
	failed_tests += do_test(0, expect, elen, fmt, ap);

	p = kvasprintf(GFP_KERNEL, fmt, ap);
	if (p) {
		if (memcmp(p, expect, elen+1)) {
			pr_warn("kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n",
				fmt, p, expect);
			failed_tests++;
		}
		kfree(p);
	}
	va_end(ap);
}

#define test(expect, fmt, ...)					\
	__test(expect, strlen(expect), fmt, ##__VA_ARGS__)

static void __init
test_basic(void)
{
	/* Work around annoying "warning: zero-length gnu_printf format string". */
	char nul = '\0';

	test("", &nul);
	test("100%", "100%%");
	test("xxx%yyy", "xxx%cyyy", '%');
	__test("xxx\0yyy", 7, "xxx%cyyy", '\0');
}

static void __init
test_number(void)
{
	test("0x1234abcd  ", "%#-12x", 0x1234abcd);
	test("  0x1234abcd", "%#12x", 0x1234abcd);
	test("0|001| 12|+123| 1234|-123|-1234", "%d|%03d|%3d|%+d|% d|%+d|% d", 0, 1, 12, 123, 1234, -123, -1234);
}

static void __init
test_string(void)
{
	test("", "%s%.0s", "", "123");
	test("ABCD|abc|123", "%s|%.3s|%.*s", "ABCD", "abcdef", 3, "123456");
	test("1  |  2|3  |  4|5  ", "%-3s|%3s|%-*s|%*s|%*s", "1", "2", 3, "3", 3, "4", -3, "5");
	test("1234      ", "%-10.4s", "123456");
	test("      1234", "%10.4s", "123456");
	/*
	 * POSIX and C99 say that a negative precision (which is only
	 * possible to pass via a * argument) should be treated as if
	 * the precision wasn't present, and that if the precision is
	 * omitted (as in %.s), the precision should be taken to be
	 * 0. However, the kernel's printf behave exactly opposite,
	 * treating a negative precision as 0 and treating an omitted
	 * precision specifier as if no precision was given.
	 *
	 * These test cases document the current behaviour; should
	 * anyone ever feel the need to follow the standards more
	 * closely, this can be revisited.
	 */
	test("    ", "%4.*s", -5, "123456");
	test("123456", "%.s", "123456");
	test("a||", "%.s|%.0s|%.*s", "a", "b", 0, "c");
	test("a  |   |   ", "%-3.s|%-3.0s|%-3.*s", "a", "b", 0, "c");
}

static void __init
plain(void)
{
	test(PTR1_ZEROES PTR1_STR " " PTR2_STR, "%p %p", PTR1, PTR2);
	/*
	 * The field width is overloaded for some %p extensions to
	 * pass another piece of information. For plain pointers, the
	 * behaviour is slightly odd: One cannot pass either the 0
	 * flag nor a precision to %p without gcc complaining, and if
	 * one explicitly gives a field width, the number is no longer
	 * zero-padded.
	 */
	test("|" PTR1_STR PTR1_SPACES "  |  " PTR1_SPACES PTR1_STR "|",
	     "|%-*p|%*p|", PTR_WIDTH+2, PTR1, PTR_WIDTH+2, PTR1);
	test("|" PTR2_STR "  |  " PTR2_STR "|",
	     "|%-*p|%*p|", PTR_WIDTH+2, PTR2, PTR_WIDTH+2, PTR2);

	/*
	 * Unrecognized %p extensions are treated as plain %p, but the
	 * alphanumeric suffix is ignored (that is, does not occur in
	 * the output.)
	 */
	test("|"PTR1_ZEROES PTR1_STR"|", "|%p0y|", PTR1);
	test("|"PTR2_STR"|", "|%p0y|", PTR2);
}

static void __init
symbol_ptr(void)
{
}

static void __init
kernel_ptr(void)
{
}

static void __init
struct_resource(void)
{
}

static void __init
addr(void)
{
}

static void __init
escaped_str(void)
{
}

static void __init
hex_string(void)
{
	const char buf[3] = {0xc0, 0xff, 0xee};

	test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",
	     "%3ph|%3phC|%3phD|%3phN", buf, buf, buf, buf);
	test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",
	     "%*ph|%*phC|%*phD|%*phN", 3, buf, 3, buf, 3, buf, 3, buf);
}

static void __init
mac(void)
{
	const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05};

	test("2d:48:d6:fc:7a:05", "%pM", addr);
	test("05:7a:fc:d6:48:2d", "%pMR", addr);
	test("2d-48-d6-fc-7a-05", "%pMF", addr);
	test("2d48d6fc7a05", "%pm", addr);
	test("057afcd6482d", "%pmR", addr);
}

static void __init
ip4(void)
{
	struct sockaddr_in sa;

	sa.sin_family = AF_INET;
	sa.sin_port = cpu_to_be16(12345);
	sa.sin_addr.s_addr = cpu_to_be32(0x7f000001);

	test("127.000.000.001|127.0.0.1", "%pi4|%pI4", &sa.sin_addr, &sa.sin_addr);
	test("127.000.000.001|127.0.0.1", "%piS|%pIS", &sa, &sa);
	sa.sin_addr.s_addr = cpu_to_be32(0x01020304);
	test("001.002.003.004:12345|1.2.3.4:12345", "%piSp|%pISp", &sa, &sa);
}

static void __init
ip6(void)
{
}

static void __init
ip(void)
{
	ip4();
	ip6();
}

static void __init
uuid(void)
{
	const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
			       0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};

	test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid);
	test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid);
	test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid);
	test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid);
}

static void __init
dentry(void)
{
}

static void __init
struct_va_format(void)
{
}

static void __init
struct_clk(void)
{
}

static void __init
bitmap(void)
{
	DECLARE_BITMAP(bits, 20);
	const int primes[] = {2,3,5,7,11,13,17,19};
	int i;

	bitmap_zero(bits, 20);
	test("00000|00000", "%20pb|%*pb", bits, 20, bits);
	test("|", "%20pbl|%*pbl", bits, 20, bits);

	for (i = 0; i < ARRAY_SIZE(primes); ++i)
		set_bit(primes[i], bits);
	test("a28ac|a28ac", "%20pb|%*pb", bits, 20, bits);
	test("2-3,5,7,11,13,17,19|2-3,5,7,11,13,17,19", "%20pbl|%*pbl", bits, 20, bits);

	bitmap_fill(bits, 20);
	test("fffff|fffff", "%20pb|%*pb", bits, 20, bits);
	test("0-19|0-19", "%20pbl|%*pbl", bits, 20, bits);
}

static void __init
netdev_features(void)
{
}

static void __init
test_pointer(void)
{
	plain();
	symbol_ptr();
	kernel_ptr();
	struct_resource();
	addr();
	escaped_str();
	hex_string();
	mac();
	ip();
	uuid();
	dentry();
	struct_va_format();
	struct_clk();
	bitmap();
	netdev_features();
}

static int __init
test_printf_init(void)
{
	alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
	if (!alloced_buffer)
		return -ENOMEM;
	test_buffer = alloced_buffer + PAD_SIZE;

	test_basic();
	test_number();
	test_string();
	test_pointer();

	kfree(alloced_buffer);

	if (failed_tests == 0)
		pr_info("all %u tests passed\n", total_tests);
	else
		pr_warn("failed %u out of %u tests\n", failed_tests, total_tests);

	return failed_tests ? -EINVAL : 0;
}

module_init(test_printf_init);

MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");
MODULE_LICENSE("GPL");
Commit	Line	Data
707cc728 RV	1	/*
	2	* Test cases for printf facility.
	3	*/
	4
	5	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	6
	7	#include <linux/init.h>
	8	#include <linux/kernel.h>
	9	#include <linux/module.h>
	10	#include <linux/printk.h>
	11	#include <linux/random.h>
	12	#include <linux/slab.h>
	13	#include <linux/string.h>
	14
	15	#include <linux/socket.h>
	16	#include <linux/in.h>
	17
	18	#define BUF_SIZE 256
331e4deb	19	#define PAD_SIZE 16
707cc728 RV	20	#define FILL_CHAR '$'
	21
	22	#define PTR1 ((void*)0x01234567)
	23	#define PTR2 ((void*)(long)(int)0xfedcba98)
	24
	25	#if BITS_PER_LONG == 64
	26	#define PTR1_ZEROES "000000000"
	27	#define PTR1_SPACES " "
	28	#define PTR1_STR "1234567"
	29	#define PTR2_STR "fffffffffedcba98"
	30	#define PTR_WIDTH 16
	31	#else
	32	#define PTR1_ZEROES "0"
	33	#define PTR1_SPACES " "
	34	#define PTR1_STR "1234567"
	35	#define PTR2_STR "fedcba98"
	36	#define PTR_WIDTH 8
	37	#endif
	38	#define PTR_WIDTH_STR stringify(PTR_WIDTH)
	39
	40	static unsigned total_tests __initdata;
	41	static unsigned failed_tests __initdata;
	42	static char *test_buffer __initdata;
331e4deb	43	static char *alloced_buffer __initdata;
707cc728 RV	44
	45	static int __printf(4, 0) __init
	46	do_test(int bufsize, const char *expect, int elen,
	47	const char *fmt, va_list ap)
	48	{
	49	va_list aq;
	50	int ret, written;
	51
	52	total_tests++;
	53
331e4deb	54	memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE);
707cc728 RV	55	va_copy(aq, ap);
	56	ret = vsnprintf(test_buffer, bufsize, fmt, aq);
	57	va_end(aq);
	58
	59	if (ret != elen) {
	60	pr_warn("vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n",
	61	bufsize, fmt, ret, elen);
	62	return 1;
	63	}
	64
331e4deb RV	65	if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) {
	66	pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", bufsize, fmt);
	67	return 1;
	68	}
	69
707cc728	70	if (!bufsize) {
331e4deb	71	if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) {
707cc728 RV	72	pr_warn("vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n",
	73	fmt);
	74	return 1;
	75	}
	76	return 0;
	77	}
	78
	79	written = min(bufsize-1, elen);
	80	if (test_buffer[written]) {
	81	pr_warn("vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n",
	82	bufsize, fmt);
	83	return 1;
	84	}
	85
331e4deb RV	86	if (memchr_inv(test_buffer + written + 1, FILL_CHAR, BUF_SIZE + PAD_SIZE - (written + 1))) {
	87	pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n",
	88	bufsize, fmt);
	89	return 1;
	90	}
	91
707cc728 RV	92	if (memcmp(test_buffer, expect, written)) {
	93	pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n",
	94	bufsize, fmt, test_buffer, written, expect);
	95	return 1;
	96	}
	97	return 0;
	98	}
	99
	100	static void __printf(3, 4) __init
	101	__test(const char expect, int elen, const char fmt, ...)
	102	{
	103	va_list ap;
	104	int rand;
	105	char *p;
	106
fd0515d5 RV	107	if (elen >= BUF_SIZE) {
	108	pr_err("error in test suite: expected output length %d too long. Format was '%s'.\n",
	109	elen, fmt);
	110	failed_tests++;
	111	return;
	112	}
707cc728 RV	113
	114	va_start(ap, fmt);
	115
	116	/*
	117	* Every fmt+args is subjected to four tests: Three where we
	118	* tell vsnprintf varying buffer sizes (plenty, not quite
	119	* enough and 0), and then we also test that kvasprintf would
	120	* be able to print it as expected.
	121	*/
	122	failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap);
	123	rand = 1 + prandom_u32_max(elen+1);
	124	/* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */
	125	failed_tests += do_test(rand, expect, elen, fmt, ap);
	126	failed_tests += do_test(0, expect, elen, fmt, ap);
	127
	128	p = kvasprintf(GFP_KERNEL, fmt, ap);
	129	if (p) {
	130	if (memcmp(p, expect, elen+1)) {
	131	pr_warn("kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n",
	132	fmt, p, expect);
	133	failed_tests++;
	134	}
	135	kfree(p);
	136	}
	137	va_end(ap);
	138	}
	139
	140	#define test(expect, fmt, ...) \
	141	__test(expect, strlen(expect), fmt, ##__VA_ARGS__)
	142
	143	static void __init
	144	test_basic(void)
	145	{
	146	/* Work around annoying "warning: zero-length gnu_printf format string". */
	147	char nul = '\0';
	148
	149	test("", &nul);
	150	test("100%", "100%%");
	151	test("xxx%yyy", "xxx%cyyy", '%');
	152	__test("xxx\0yyy", 7, "xxx%cyyy", '\0');
	153	}
	154
	155	static void __init
	156	test_number(void)
	157	{
	158	test("0x1234abcd ", "%#-12x", 0x1234abcd);
	159	test(" 0x1234abcd", "%#12x", 0x1234abcd);
	160	test("0\|001\| 12\|+123\| 1234\|-123\|-1234", "%d\|%03d\|%3d\|%+d\|% d\|%+d\|% d", 0, 1, 12, 123, 1234, -123, -1234);
	161	}
	162
	163	static void __init
	164	test_string(void)
	165	{
	166	test("", "%s%.0s", "", "123");
	167	test("ABCD\|abc\|123", "%s\|%.3s\|%.*s", "ABCD", "abcdef", 3, "123456");
	168	test("1 \| 2\|3 \| 4\|5 ", "%-3s\|%3s\|%-s\|%s\|%*s", "1", "2", 3, "3", 3, "4", -3, "5");
f176eb4c RV	169	test("1234 ", "%-10.4s", "123456");
f176eb4c RV	170	test(" 1234", "%10.4s", "123456");
707cc728	171	/*
f176eb4c RV	172	* POSIX and C99 say that a negative precision (which is only
	173	* possible to pass via a * argument) should be treated as if
	174	* the precision wasn't present, and that if the precision is
	175	* omitted (as in %.s), the precision should be taken to be
	176	* 0. However, the kernel's printf behave exactly opposite,
	177	* treating a negative precision as 0 and treating an omitted
	178	* precision specifier as if no precision was given.
	179	*
	180	* These test cases document the current behaviour; should
	181	* anyone ever feel the need to follow the standards more
	182	* closely, this can be revisited.
707cc728	183	*/
f176eb4c RV	184	test(" ", "%4.*s", -5, "123456");
f176eb4c RV	185	test("123456", "%.s", "123456");
707cc728 RV	186	test("a\|\|", "%.s\|%.0s\|%.*s", "a", "b", 0, "c");
	187	test("a \| \| ", "%-3.s\|%-3.0s\|%-3.*s", "a", "b", 0, "c");
	188	}
	189
	190	static void __init
	191	plain(void)
	192	{
	193	test(PTR1_ZEROES PTR1_STR " " PTR2_STR, "%p %p", PTR1, PTR2);
	194	/*
	195	* The field width is overloaded for some %p extensions to
	196	* pass another piece of information. For plain pointers, the
	197	* behaviour is slightly odd: One cannot pass either the 0
	198	* flag nor a precision to %p without gcc complaining, and if
	199	* one explicitly gives a field width, the number is no longer
	200	* zero-padded.
	201	*/
	202	test("\|" PTR1_STR PTR1_SPACES " \| " PTR1_SPACES PTR1_STR "\|",
	203	"\|%-p\|%p\|", PTR_WIDTH+2, PTR1, PTR_WIDTH+2, PTR1);
	204	test("\|" PTR2_STR " \| " PTR2_STR "\|",
	205	"\|%-p\|%p\|", PTR_WIDTH+2, PTR2, PTR_WIDTH+2, PTR2);
	206
	207	/*
	208	* Unrecognized %p extensions are treated as plain %p, but the
	209	* alphanumeric suffix is ignored (that is, does not occur in
	210	* the output.)
	211	*/
	212	test("\|"PTR1_ZEROES PTR1_STR"\|", "\|%p0y\|", PTR1);
	213	test("\|"PTR2_STR"\|", "\|%p0y\|", PTR2);
	214	}
	215
	216	static void __init
	217	symbol_ptr(void)
	218	{
	219	}
	220
	221	static void __init
	222	kernel_ptr(void)
	223	{
	224	}
	225
	226	static void __init
	227	struct_resource(void)
	228	{
	229	}
	230
	231	static void __init
	232	addr(void)
	233	{
	234	}
	235
	236	static void __init
	237	escaped_str(void)
	238	{
	239	}
	240
	241	static void __init
	242	hex_string(void)
	243	{
	244	const char buf[3] = {0xc0, 0xff, 0xee};
	245
	246	test("c0 ff ee\|c0:ff:ee\|c0-ff-ee\|c0ffee",
	247	"%3ph\|%3phC\|%3phD\|%3phN", buf, buf, buf, buf);
	248	test("c0 ff ee\|c0:ff:ee\|c0-ff-ee\|c0ffee",
	249	"%ph\|%phC\|%phD\|%phN", 3, buf, 3, buf, 3, buf, 3, buf);
250	}
251
252	static void __init
253	mac(void)
254	{
255	const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05};
256
257	test("2d:48:d6:fc:7a:05", "%pM", addr);
258	test("05:7a:fc:d6:48:2d", "%pMR", addr);
259	test("2d-48-d6-fc-7a-05", "%pMF", addr);
260	test("2d48d6fc7a05", "%pm", addr);
261	test("057afcd6482d", "%pmR", addr);
262	}
263
264	static void __init
265	ip4(void)
266	{
267	struct sockaddr_in sa;
268
269	sa.sin_family = AF_INET;
270	sa.sin_port = cpu_to_be16(12345);
271	sa.sin_addr.s_addr = cpu_to_be32(0x7f000001);
272
273	test("127.000.000.001\|127.0.0.1", "%pi4\|%pI4", &sa.sin_addr, &sa.sin_addr);
274	test("127.000.000.001\|127.0.0.1", "%piS\|%pIS", &sa, &sa);
275	sa.sin_addr.s_addr = cpu_to_be32(0x01020304);
276	test("001.002.003.004:12345\|1.2.3.4:12345", "%piSp\|%pISp", &sa, &sa);
277	}
278
279	static void __init
280	ip6(void)
281	{
282	}
283
284	static void __init
285	ip(void)
286	{
287	ip4();
288	ip6();
289	}
290
291	static void __init
292	uuid(void)
293	{
294	const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
295	0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};
296
297	test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid);
298	test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid);
299	test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid);
300	test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid);
301	}
302
303	static void __init
304	dentry(void)
305	{
306	}
307
308	static void __init
309	struct_va_format(void)
310	{
311	}
312
313	static void __init
314	struct_clk(void)
315	{
316	}
317
318	static void __init
319	bitmap(void)
320	{
321	DECLARE_BITMAP(bits, 20);
322	const int primes[] = {2,3,5,7,11,13,17,19};
323	int i;
324
325	bitmap_zero(bits, 20);
326	test("00000\|00000", "%20pb\|%*pb", bits, 20, bits);
327	test("\|", "%20pbl\|%*pbl", bits, 20, bits);
328
329	for (i = 0; i < ARRAY_SIZE(primes); ++i)
330	set_bit(primes[i], bits);
331	test("a28ac\|a28ac", "%20pb\|%*pb", bits, 20, bits);
332	test("2-3,5,7,11,13,17,19\|2-3,5,7,11,13,17,19", "%20pbl\|%*pbl", bits, 20, bits);
333
334	bitmap_fill(bits, 20);
335	test("fffff\|fffff", "%20pb\|%*pb", bits, 20, bits);
336	test("0-19\|0-19", "%20pbl\|%*pbl", bits, 20, bits);
337	}
338
339	static void __init
340	netdev_features(void)
341	{
342	}
343
344	static void __init
345	test_pointer(void)
346	{
347	plain();
348	symbol_ptr();
349	kernel_ptr();
350	struct_resource();
351	addr();
352	escaped_str();
353	hex_string();
354	mac();
355	ip();
356	uuid();
357	dentry();
358	struct_va_format();
359	struct_clk();
360	bitmap();
361	netdev_features();
362	}
363
364	static int __init
365	test_printf_init(void)
366	{
331e4deb RV	367	alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
331e4deb RV	368	if (!alloced_buffer)
707cc728	369	return -ENOMEM;
331e4deb	370	test_buffer = alloced_buffer + PAD_SIZE;
707cc728 RV	371
	372	test_basic();
	373	test_number();
	374	test_string();
	375	test_pointer();
	376
331e4deb	377	kfree(alloced_buffer);
707cc728 RV	378
	379	if (failed_tests == 0)
	380	pr_info("all %u tests passed\n", total_tests);
	381	else
	382	pr_warn("failed %u out of %u tests\n", failed_tests, total_tests);
	383
	384	return failed_tests ? -EINVAL : 0;
	385	}
	386
	387	module_init(test_printf_init);
	388
	389	MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");
	390	MODULE_LICENSE("GPL");