[linux.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/bitmap.h>
#include <linux/dcache.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) {
		total_tests++;
		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);
	test("0|1|1|128|255", "%hhu|%hhu|%hhu|%hhu|%hhu", 0, 1, 257, 128, -1);
	test("0|1|1|-128|-1", "%hhd|%hhd|%hhd|%hhd|%hhd", 0, 1, 257, 128, -1);
	test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627);
	/*
	 * POSIX/C99: »The result of converting zero with an explicit
	 * precision of zero shall be no characters.« Hence the output
	 * from the below test should really be "00|0||| ". However,
	 * the kernel's printf also produces a single 0 in that
	 * case. This test case simply documents the current
	 * behaviour.
	 */
	test("00|0|0|0|0", "%.2d|%.1d|%.0d|%.*d|%1.0d", 0, 0, 0, 0, 0, 0);
#ifndef __CHAR_UNSIGNED__
	{
		/*
		 * Passing a 'char' to a %02x specifier doesn't do
		 * what was presumably the intention when char is
		 * signed and the value is negative. One must either &
		 * with 0xff or cast to u8.
		 */
		char val = -16;
		test("0xfffffff0|0xf0|0xf0", "%#02x|%#02x|%#02x", val, val & 0xff, (u8)val);
	}
#endif
}

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 struct dentry test_dentry[4] __initdata = {
	{ .d_parent = &test_dentry[0],
	  .d_name = QSTR_INIT(test_dentry[0].d_iname, 3),
	  .d_iname = "foo" },
	{ .d_parent = &test_dentry[0],
	  .d_name = QSTR_INIT(test_dentry[1].d_iname, 5),
	  .d_iname = "bravo" },
	{ .d_parent = &test_dentry[1],
	  .d_name = QSTR_INIT(test_dentry[2].d_iname, 4),
	  .d_iname = "alfa" },
	{ .d_parent = &test_dentry[2],
	  .d_name = QSTR_INIT(test_dentry[3].d_iname, 5),
	  .d_iname = "romeo" },
};

static void __init
dentry(void)
{
	test("foo", "%pd", &test_dentry[0]);
	test("foo", "%pd2", &test_dentry[0]);

	test("romeo", "%pd", &test_dentry[3]);
	test("alfa/romeo", "%pd2", &test_dentry[3]);
	test("bravo/alfa/romeo", "%pd3", &test_dentry[3]);
	test("/bravo/alfa/romeo", "%pd4", &test_dentry[3]);
	test("/bravo/alfa", "%pd4", &test_dentry[2]);

	test("bravo/alfa  |bravo/alfa  ", "%-12pd2|%*pd2", &test_dentry[2], -12, &test_dentry[2]);
	test("  bravo/alfa|  bravo/alfa", "%12pd2|%*pd2", &test_dentry[2], 12, &test_dentry[2]);
}

static void __init
struct_va_format(void)
{
}

static void __init
struct_clk(void)
{
}

static void __init
large_bitmap(void)
{
	const int nbits = 1 << 16;
	unsigned long *bits = kcalloc(BITS_TO_LONGS(nbits), sizeof(long), GFP_KERNEL);
	if (!bits)
		return;

	bitmap_set(bits, 1, 20);
	bitmap_set(bits, 60000, 15);
	test("1-20,60000-60014", "%*pbl", nbits, bits);
	kfree(bits);
}

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);

	large_bitmap();
}

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 <[email protected]>");
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
857cca4d	15	#include <linux/bitmap.h>
251c7234	16	#include <linux/dcache.h>
707cc728 RV	17	#include <linux/socket.h>
	18	#include <linux/in.h>
	19
	20	#define BUF_SIZE 256
331e4deb	21	#define PAD_SIZE 16
707cc728 RV	22	#define FILL_CHAR '$'
	23
	24	#define PTR1 ((void*)0x01234567)
	25	#define PTR2 ((void*)(long)(int)0xfedcba98)
	26
	27	#if BITS_PER_LONG == 64
	28	#define PTR1_ZEROES "000000000"
	29	#define PTR1_SPACES " "
	30	#define PTR1_STR "1234567"
	31	#define PTR2_STR "fffffffffedcba98"
	32	#define PTR_WIDTH 16
	33	#else
	34	#define PTR1_ZEROES "0"
	35	#define PTR1_SPACES " "
	36	#define PTR1_STR "1234567"
	37	#define PTR2_STR "fedcba98"
	38	#define PTR_WIDTH 8
	39	#endif
	40	#define PTR_WIDTH_STR stringify(PTR_WIDTH)
	41
	42	static unsigned total_tests __initdata;
	43	static unsigned failed_tests __initdata;
	44	static char *test_buffer __initdata;
331e4deb	45	static char *alloced_buffer __initdata;
707cc728 RV	46
	47	static int __printf(4, 0) __init
	48	do_test(int bufsize, const char *expect, int elen,
	49	const char *fmt, va_list ap)
	50	{
	51	va_list aq;
	52	int ret, written;
	53
	54	total_tests++;
	55
331e4deb	56	memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE);
707cc728 RV	57	va_copy(aq, ap);
	58	ret = vsnprintf(test_buffer, bufsize, fmt, aq);
	59	va_end(aq);
	60
	61	if (ret != elen) {
	62	pr_warn("vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n",
	63	bufsize, fmt, ret, elen);
	64	return 1;
	65	}
	66
331e4deb RV	67	if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) {
	68	pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", bufsize, fmt);
	69	return 1;
	70	}
	71
707cc728	72	if (!bufsize) {
331e4deb	73	if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) {
707cc728 RV	74	pr_warn("vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n",
	75	fmt);
	76	return 1;
	77	}
	78	return 0;
	79	}
	80
	81	written = min(bufsize-1, elen);
	82	if (test_buffer[written]) {
	83	pr_warn("vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n",
	84	bufsize, fmt);
	85	return 1;
	86	}
	87
331e4deb RV	88	if (memchr_inv(test_buffer + written + 1, FILL_CHAR, BUF_SIZE + PAD_SIZE - (written + 1))) {
	89	pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n",
	90	bufsize, fmt);
	91	return 1;
	92	}
	93
707cc728 RV	94	if (memcmp(test_buffer, expect, written)) {
	95	pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n",
	96	bufsize, fmt, test_buffer, written, expect);
	97	return 1;
	98	}
	99	return 0;
	100	}
	101
	102	static void __printf(3, 4) __init
	103	__test(const char expect, int elen, const char fmt, ...)
	104	{
	105	va_list ap;
	106	int rand;
	107	char *p;
	108
fd0515d5 RV	109	if (elen >= BUF_SIZE) {
	110	pr_err("error in test suite: expected output length %d too long. Format was '%s'.\n",
	111	elen, fmt);
	112	failed_tests++;
	113	return;
	114	}
707cc728 RV	115
	116	va_start(ap, fmt);
	117
	118	/*
	119	* Every fmt+args is subjected to four tests: Three where we
	120	* tell vsnprintf varying buffer sizes (plenty, not quite
	121	* enough and 0), and then we also test that kvasprintf would
	122	* be able to print it as expected.
	123	*/
	124	failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap);
	125	rand = 1 + prandom_u32_max(elen+1);
	126	/* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */
	127	failed_tests += do_test(rand, expect, elen, fmt, ap);
	128	failed_tests += do_test(0, expect, elen, fmt, ap);
	129
	130	p = kvasprintf(GFP_KERNEL, fmt, ap);
	131	if (p) {
b79a7db3	132	total_tests++;
707cc728 RV	133	if (memcmp(p, expect, elen+1)) {
	134	pr_warn("kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n",
	135	fmt, p, expect);
	136	failed_tests++;
	137	}
	138	kfree(p);
	139	}
	140	va_end(ap);
	141	}
	142
	143	#define test(expect, fmt, ...) \
	144	__test(expect, strlen(expect), fmt, ##__VA_ARGS__)
	145
	146	static void __init
	147	test_basic(void)
	148	{
	149	/* Work around annoying "warning: zero-length gnu_printf format string". */
	150	char nul = '\0';
	151
	152	test("", &nul);
	153	test("100%", "100%%");
	154	test("xxx%yyy", "xxx%cyyy", '%');
	155	__test("xxx\0yyy", 7, "xxx%cyyy", '\0');
	156	}
	157
	158	static void __init
	159	test_number(void)
	160	{
	161	test("0x1234abcd ", "%#-12x", 0x1234abcd);
	162	test(" 0x1234abcd", "%#12x", 0x1234abcd);
	163	test("0\|001\| 12\|+123\| 1234\|-123\|-1234", "%d\|%03d\|%3d\|%+d\|% d\|%+d\|% d", 0, 1, 12, 123, 1234, -123, -1234);
1ca8e8eb RV	164	test("0\|1\|1\|128\|255", "%hhu\|%hhu\|%hhu\|%hhu\|%hhu", 0, 1, 257, 128, -1);
	165	test("0\|1\|1\|-128\|-1", "%hhd\|%hhd\|%hhd\|%hhd\|%hhd", 0, 1, 257, 128, -1);
	166	test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627);
	167	/*
	168	* POSIX/C99: »The result of converting zero with an explicit
	169	* precision of zero shall be no characters.« Hence the output
	170	* from the below test should really be "00\|0\|\|\| ". However,
	171	* the kernel's printf also produces a single 0 in that
	172	* case. This test case simply documents the current
	173	* behaviour.
	174	*/
	175	test("00\|0\|0\|0\|0", "%.2d\|%.1d\|%.0d\|%.*d\|%1.0d", 0, 0, 0, 0, 0, 0);
	176	#ifndef __CHAR_UNSIGNED__
	177	{
	178	/*
	179	* Passing a 'char' to a %02x specifier doesn't do
	180	* what was presumably the intention when char is
	181	* signed and the value is negative. One must either &
	182	* with 0xff or cast to u8.
	183	*/
	184	char val = -16;
	185	test("0xfffffff0\|0xf0\|0xf0", "%#02x\|%#02x\|%#02x", val, val & 0xff, (u8)val);
	186	}
	187	#endif
707cc728 RV	188	}
	189
	190	static void __init
	191	test_string(void)
	192	{
	193	test("", "%s%.0s", "", "123");
	194	test("ABCD\|abc\|123", "%s\|%.3s\|%.*s", "ABCD", "abcdef", 3, "123456");
	195	test("1 \| 2\|3 \| 4\|5 ", "%-3s\|%3s\|%-s\|%s\|%*s", "1", "2", 3, "3", 3, "4", -3, "5");
f176eb4c RV	196	test("1234 ", "%-10.4s", "123456");
f176eb4c RV	197	test(" 1234", "%10.4s", "123456");
707cc728	198	/*
f176eb4c RV	199	* POSIX and C99 say that a negative precision (which is only
	200	* possible to pass via a * argument) should be treated as if
	201	* the precision wasn't present, and that if the precision is
	202	* omitted (as in %.s), the precision should be taken to be
	203	* 0. However, the kernel's printf behave exactly opposite,
	204	* treating a negative precision as 0 and treating an omitted
	205	* precision specifier as if no precision was given.
	206	*
	207	* These test cases document the current behaviour; should
	208	* anyone ever feel the need to follow the standards more
	209	* closely, this can be revisited.
707cc728	210	*/
f176eb4c RV	211	test(" ", "%4.*s", -5, "123456");
f176eb4c RV	212	test("123456", "%.s", "123456");
707cc728 RV	213	test("a\|\|", "%.s\|%.0s\|%.*s", "a", "b", 0, "c");
	214	test("a \| \| ", "%-3.s\|%-3.0s\|%-3.*s", "a", "b", 0, "c");
	215	}
	216
	217	static void __init
	218	plain(void)
	219	{
	220	test(PTR1_ZEROES PTR1_STR " " PTR2_STR, "%p %p", PTR1, PTR2);
	221	/*
	222	* The field width is overloaded for some %p extensions to
	223	* pass another piece of information. For plain pointers, the
	224	* behaviour is slightly odd: One cannot pass either the 0
	225	* flag nor a precision to %p without gcc complaining, and if
	226	* one explicitly gives a field width, the number is no longer
	227	* zero-padded.
	228	*/
	229	test("\|" PTR1_STR PTR1_SPACES " \| " PTR1_SPACES PTR1_STR "\|",
	230	"\|%-p\|%p\|", PTR_WIDTH+2, PTR1, PTR_WIDTH+2, PTR1);
	231	test("\|" PTR2_STR " \| " PTR2_STR "\|",
	232	"\|%-p\|%p\|", PTR_WIDTH+2, PTR2, PTR_WIDTH+2, PTR2);
	233
	234	/*
	235	* Unrecognized %p extensions are treated as plain %p, but the
	236	* alphanumeric suffix is ignored (that is, does not occur in
	237	* the output.)
	238	*/
	239	test("\|"PTR1_ZEROES PTR1_STR"\|", "\|%p0y\|", PTR1);
	240	test("\|"PTR2_STR"\|", "\|%p0y\|", PTR2);
	241	}
	242
	243	static void __init
	244	symbol_ptr(void)
	245	{
	246	}
	247
	248	static void __init
	249	kernel_ptr(void)
	250	{
	251	}
	252
	253	static void __init
	254	struct_resource(void)
	255	{
	256	}
	257
	258	static void __init
	259	addr(void)
	260	{
	261	}
	262
	263	static void __init
	264	escaped_str(void)
	265	{
	266	}
	267
	268	static void __init
	269	hex_string(void)
	270	{
	271	const char buf[3] = {0xc0, 0xff, 0xee};
	272
	273	test("c0 ff ee\|c0:ff:ee\|c0-ff-ee\|c0ffee",
	274	"%3ph\|%3phC\|%3phD\|%3phN", buf, buf, buf, buf);
	275	test("c0 ff ee\|c0:ff:ee\|c0-ff-ee\|c0ffee",
	276	"%ph\|%phC\|%phD\|%phN", 3, buf, 3, buf, 3, buf, 3, buf);
277	}
278
279	static void __init
280	mac(void)
281	{
282	const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05};
283
284	test("2d:48:d6:fc:7a:05", "%pM", addr);
285	test("05:7a:fc:d6:48:2d", "%pMR", addr);
286	test("2d-48-d6-fc-7a-05", "%pMF", addr);
287	test("2d48d6fc7a05", "%pm", addr);
288	test("057afcd6482d", "%pmR", addr);
289	}
290
291	static void __init
292	ip4(void)
293	{
294	struct sockaddr_in sa;
295
296	sa.sin_family = AF_INET;
297	sa.sin_port = cpu_to_be16(12345);
298	sa.sin_addr.s_addr = cpu_to_be32(0x7f000001);
299
300	test("127.000.000.001\|127.0.0.1", "%pi4\|%pI4", &sa.sin_addr, &sa.sin_addr);
301	test("127.000.000.001\|127.0.0.1", "%piS\|%pIS", &sa, &sa);
302	sa.sin_addr.s_addr = cpu_to_be32(0x01020304);
303	test("001.002.003.004:12345\|1.2.3.4:12345", "%piSp\|%pISp", &sa, &sa);
304	}
305
306	static void __init
307	ip6(void)
308	{
309	}
310
311	static void __init
312	ip(void)
313	{
314	ip4();
315	ip6();
316	}
317
318	static void __init
319	uuid(void)
320	{
321	const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
322	0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};
323
324	test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid);
325	test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid);
326	test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid);
327	test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid);
328	}
329
251c7234 RV	330	static struct dentry test_dentry[4] __initdata = {
	331	{ .d_parent = &test_dentry[0],
	332	.d_name = QSTR_INIT(test_dentry[0].d_iname, 3),
	333	.d_iname = "foo" },
	334	{ .d_parent = &test_dentry[0],
	335	.d_name = QSTR_INIT(test_dentry[1].d_iname, 5),
	336	.d_iname = "bravo" },
	337	{ .d_parent = &test_dentry[1],
	338	.d_name = QSTR_INIT(test_dentry[2].d_iname, 4),
	339	.d_iname = "alfa" },
	340	{ .d_parent = &test_dentry[2],
	341	.d_name = QSTR_INIT(test_dentry[3].d_iname, 5),
	342	.d_iname = "romeo" },
	343	};
	344
707cc728 RV	345	static void __init
	346	dentry(void)
	347	{
251c7234 RV	348	test("foo", "%pd", &test_dentry[0]);
	349	test("foo", "%pd2", &test_dentry[0]);
	350
	351	test("romeo", "%pd", &test_dentry[3]);
	352	test("alfa/romeo", "%pd2", &test_dentry[3]);
	353	test("bravo/alfa/romeo", "%pd3", &test_dentry[3]);
	354	test("/bravo/alfa/romeo", "%pd4", &test_dentry[3]);
	355	test("/bravo/alfa", "%pd4", &test_dentry[2]);
	356
	357	test("bravo/alfa \|bravo/alfa ", "%-12pd2\|%*pd2", &test_dentry[2], -12, &test_dentry[2]);
	358	test(" bravo/alfa\| bravo/alfa", "%12pd2\|%*pd2", &test_dentry[2], 12, &test_dentry[2]);
707cc728 RV	359	}
	360
	361	static void __init
	362	struct_va_format(void)
	363	{
	364	}
	365
	366	static void __init
	367	struct_clk(void)
	368	{
	369	}
	370
857cca4d RV	371	static void __init
	372	large_bitmap(void)
	373	{
	374	const int nbits = 1 << 16;
	375	unsigned long *bits = kcalloc(BITS_TO_LONGS(nbits), sizeof(long), GFP_KERNEL);
	376	if (!bits)
	377	return;
	378
	379	bitmap_set(bits, 1, 20);
	380	bitmap_set(bits, 60000, 15);
	381	test("1-20,60000-60014", "%*pbl", nbits, bits);
	382	kfree(bits);
	383	}
	384
707cc728 RV	385	static void __init
	386	bitmap(void)
	387	{
	388	DECLARE_BITMAP(bits, 20);
	389	const int primes[] = {2,3,5,7,11,13,17,19};
	390	int i;
	391
	392	bitmap_zero(bits, 20);
	393	test("00000\|00000", "%20pb\|%*pb", bits, 20, bits);
	394	test("\|", "%20pbl\|%*pbl", bits, 20, bits);
	395
	396	for (i = 0; i < ARRAY_SIZE(primes); ++i)
	397	set_bit(primes[i], bits);
	398	test("a28ac\|a28ac", "%20pb\|%*pb", bits, 20, bits);
	399	test("2-3,5,7,11,13,17,19\|2-3,5,7,11,13,17,19", "%20pbl\|%*pbl", bits, 20, bits);
	400
	401	bitmap_fill(bits, 20);
	402	test("fffff\|fffff", "%20pb\|%*pb", bits, 20, bits);
	403	test("0-19\|0-19", "%20pbl\|%*pbl", bits, 20, bits);
857cca4d RV	404
857cca4d RV	405	large_bitmap();
707cc728 RV	406	}
	407
	408	static void __init
	409	netdev_features(void)
	410	{
	411	}
	412
	413	static void __init
	414	test_pointer(void)
	415	{
	416	plain();
	417	symbol_ptr();
	418	kernel_ptr();
	419	struct_resource();
	420	addr();
	421	escaped_str();
	422	hex_string();
	423	mac();
	424	ip();
	425	uuid();
	426	dentry();
	427	struct_va_format();
	428	struct_clk();
	429	bitmap();
	430	netdev_features();
	431	}
	432
	433	static int __init
	434	test_printf_init(void)
	435	{
331e4deb RV	436	alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
331e4deb RV	437	if (!alloced_buffer)
707cc728	438	return -ENOMEM;
331e4deb	439	test_buffer = alloced_buffer + PAD_SIZE;
707cc728 RV	440
	441	test_basic();
	442	test_number();
	443	test_string();
	444	test_pointer();
	445
331e4deb	446	kfree(alloced_buffer);
707cc728 RV	447
	448	if (failed_tests == 0)
	449	pr_info("all %u tests passed\n", total_tests);
	450	else
	451	pr_warn("failed %u out of %u tests\n", failed_tests, total_tests);
	452
	453	return failed_tests ? -EINVAL : 0;
	454	}
	455
	456	module_init(test_printf_init);
	457
	458	MODULE_AUTHOR("Rasmus Villemoes <[email protected]>");
	459	MODULE_LICENSE("GPL");