[thirdparty/kernel/linux.git] / lib / test_printf.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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/rtc.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>

#include <linux/gfp.h>
#include <linux/mm.h>

#include <linux/property.h>

#include "../tools/testing/selftests/kselftest_module.h"

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

KSTM_MODULE_GLOBALS();

static char *test_buffer __initdata;
static char *alloced_buffer __initdata;

extern bool no_hash_pointers;

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");
}

#define PLAIN_BUF_SIZE 64	/* leave some space so we don't oops */

#if BITS_PER_LONG == 64

#define PTR_WIDTH 16
#define PTR ((void *)0xffff0123456789abUL)
#define PTR_STR "ffff0123456789ab"
#define PTR_VAL_NO_CRNG "(____ptrval____)"
#define ZEROS "00000000"	/* hex 32 zero bits */
#define ONES "ffffffff"		/* hex 32 one bits */

static int __init
plain_format(void)
{
	char buf[PLAIN_BUF_SIZE];
	int nchars;

	nchars = snprintf(buf, PLAIN_BUF_SIZE, "%p", PTR);

	if (nchars != PTR_WIDTH)
		return -1;

	if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
		pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
			PTR_VAL_NO_CRNG);
		return 0;
	}

	if (strncmp(buf, ZEROS, strlen(ZEROS)) != 0)
		return -1;

	return 0;
}

#else

#define PTR_WIDTH 8
#define PTR ((void *)0x456789ab)
#define PTR_STR "456789ab"
#define PTR_VAL_NO_CRNG "(ptrval)"
#define ZEROS ""
#define ONES ""

static int __init
plain_format(void)
{
	/* Format is implicitly tested for 32 bit machines by plain_hash() */
	return 0;
}

#endif	/* BITS_PER_LONG == 64 */

static int __init
plain_hash_to_buffer(const void *p, char *buf, size_t len)
{
	int nchars;

	nchars = snprintf(buf, len, "%p", p);

	if (nchars != PTR_WIDTH)
		return -1;

	if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
		pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
			PTR_VAL_NO_CRNG);
		return 0;
	}

	return 0;
}

static int __init
plain_hash(void)
{
	char buf[PLAIN_BUF_SIZE];
	int ret;

	ret = plain_hash_to_buffer(PTR, buf, PLAIN_BUF_SIZE);
	if (ret)
		return ret;

	if (strncmp(buf, PTR_STR, PTR_WIDTH) == 0)
		return -1;

	return 0;
}

/*
 * We can't use test() to test %p because we don't know what output to expect
 * after an address is hashed.
 */
static void __init
plain(void)
{
	int err;

	if (no_hash_pointers) {
		pr_warn("skipping plain 'p' tests");
		skipped_tests += 2;
		return;
	}

	err = plain_hash();
	if (err) {
		pr_warn("plain 'p' does not appear to be hashed\n");
		failed_tests++;
		return;
	}

	err = plain_format();
	if (err) {
		pr_warn("hashing plain 'p' has unexpected format\n");
		failed_tests++;
	}
}

static void __init
test_hashed(const char *fmt, const void *p)
{
	char buf[PLAIN_BUF_SIZE];
	int ret;

	/*
	 * No need to increase failed test counter since this is assumed
	 * to be called after plain().
	 */
	ret = plain_hash_to_buffer(p, buf, PLAIN_BUF_SIZE);
	if (ret)
		return;

	test(buf, fmt, p);
}

/*
 * NULL pointers aren't hashed.
 */
static void __init
null_pointer(void)
{
	test(ZEROS "00000000", "%p", NULL);
	test(ZEROS "00000000", "%px", NULL);
	test("(null)", "%pE", NULL);
}

/*
 * Error pointers aren't hashed.
 */
static void __init
error_pointer(void)
{
	test(ONES "fffffff5", "%p", ERR_PTR(-11));
	test(ONES "fffffff5", "%px", ERR_PTR(-11));
	test("(efault)", "%pE", ERR_PTR(-11));
}

#define PTR_INVALID ((void *)0x000000ab)

static void __init
invalid_pointer(void)
{
	test_hashed("%p", PTR_INVALID);
	test(ZEROS "000000ab", "%px", PTR_INVALID);
	test("(efault)", "%pE", PTR_INVALID);
}

static void __init
symbol_ptr(void)
{
}

static void __init
kernel_ptr(void)
{
	/* We can't test this without access to kptr_restrict. */
}

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("(null)", "%pd", NULL);
	test("(efault)", "%pd", PTR_INVALID);
	test("(null)", "%pD", NULL);
	test("(efault)", "%pD", PTR_INVALID);

	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
time_and_date(void)
{
	/* 1543210543 */
	const struct rtc_time tm = {
		.tm_sec = 43,
		.tm_min = 35,
		.tm_hour = 5,
		.tm_mday = 26,
		.tm_mon = 10,
		.tm_year = 118,
	};
	/* 2019-01-04T15:32:23 */
	time64_t t = 1546615943;

	test("(%pt?)", "%pt", &tm);
	test("2018-11-26T05:35:43", "%ptR", &tm);
	test("0118-10-26T05:35:43", "%ptRr", &tm);
	test("05:35:43|2018-11-26", "%ptRt|%ptRd", &tm, &tm);
	test("05:35:43|0118-10-26", "%ptRtr|%ptRdr", &tm, &tm);
	test("05:35:43|2018-11-26", "%ptRttr|%ptRdtr", &tm, &tm);
	test("05:35:43 tr|2018-11-26 tr", "%ptRt tr|%ptRd tr", &tm, &tm);

	test("2019-01-04T15:32:23", "%ptT", &t);
	test("0119-00-04T15:32:23", "%ptTr", &t);
	test("15:32:23|2019-01-04", "%ptTt|%ptTd", &t, &t);
	test("15:32:23|0119-00-04", "%ptTtr|%ptTdr", &t, &t);
}

static void __init
struct_clk(void)
{
}

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

	bitmap_set(bits, 1, 20);
	bitmap_set(bits, 60000, 15);
	test("1-20,60000-60014", "%*pbl", nbits, bits);
	bitmap_free(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
flags(void)
{
	unsigned long flags;
	gfp_t gfp;
	char *cmp_buffer;

	flags = 0;
	test("", "%pGp", &flags);

	/* Page flags should filter the zone id */
	flags = 1UL << NR_PAGEFLAGS;
	test("", "%pGp", &flags);

	flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru
		| 1UL << PG_active | 1UL << PG_swapbacked;
	test("uptodate|dirty|lru|active|swapbacked", "%pGp", &flags);


	flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC
			| VM_DENYWRITE;
	test("read|exec|mayread|maywrite|mayexec|denywrite", "%pGv", &flags);

	gfp = GFP_TRANSHUGE;
	test("GFP_TRANSHUGE", "%pGg", &gfp);

	gfp = GFP_ATOMIC|__GFP_DMA;
	test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp);

	gfp = __GFP_ATOMIC;
	test("__GFP_ATOMIC", "%pGg", &gfp);

	cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL);
	if (!cmp_buffer)
		return;

	/* Any flags not translated by the table should remain numeric */
	gfp = ~__GFP_BITS_MASK;
	snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp);
	test(cmp_buffer, "%pGg", &gfp);

	snprintf(cmp_buffer, BUF_SIZE, "__GFP_ATOMIC|%#lx",
							(unsigned long) gfp);
	gfp |= __GFP_ATOMIC;
	test(cmp_buffer, "%pGg", &gfp);

	kfree(cmp_buffer);
}

static void __init fwnode_pointer(void)
{
	const struct software_node softnodes[] = {
		{ .name = "first", },
		{ .name = "second", .parent = &softnodes[0], },
		{ .name = "third", .parent = &softnodes[1], },
		{ NULL /* Guardian */ }
	};
	const char * const full_name = "first/second/third";
	const char * const full_name_second = "first/second";
	const char * const second_name = "second";
	const char * const third_name = "third";
	int rval;

	rval = software_node_register_nodes(softnodes);
	if (rval) {
		pr_warn("cannot register softnodes; rval %d\n", rval);
		return;
	}

	test(full_name_second, "%pfw", software_node_fwnode(&softnodes[1]));
	test(full_name, "%pfw", software_node_fwnode(&softnodes[2]));
	test(full_name, "%pfwf", software_node_fwnode(&softnodes[2]));
	test(second_name, "%pfwP", software_node_fwnode(&softnodes[1]));
	test(third_name, "%pfwP", software_node_fwnode(&softnodes[2]));

	software_node_unregister_nodes(softnodes);
}

static void __init
errptr(void)
{
	test("-1234", "%pe", ERR_PTR(-1234));

	/* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */
	BUILD_BUG_ON(IS_ERR(PTR));
	test_hashed("%pe", PTR);

#ifdef CONFIG_SYMBOLIC_ERRNAME
	test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK));
	test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN));
	BUILD_BUG_ON(EAGAIN != EWOULDBLOCK);
	test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK));
	test("[-EIO    ]", "[%-8pe]", ERR_PTR(-EIO));
	test("[    -EIO]", "[%8pe]", ERR_PTR(-EIO));
	test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER));
#endif
}

static void __init
test_pointer(void)
{
	plain();
	null_pointer();
	error_pointer();
	invalid_pointer();
	symbol_ptr();
	kernel_ptr();
	struct_resource();
	addr();
	escaped_str();
	hex_string();
	mac();
	ip();
	uuid();
	dentry();
	struct_va_format();
	time_and_date();
	struct_clk();
	bitmap();
	netdev_features();
	flags();
	errptr();
	fwnode_pointer();
}

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

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

	kfree(alloced_buffer);
}

KSTM_MODULE_LOADERS(test_printf);
MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");
MODULE_LICENSE("GPL");
Commit	Line	Data
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>
f1ce39df SA	26
6b1a4d5b TH	27	#include "../tools/testing/selftests/kselftest_module.h"
6b1a4d5b TH	28
707cc728	29	#define BUF_SIZE 256
331e4deb	30	#define PAD_SIZE 16
707cc728 RV	31	#define FILL_CHAR '$'
707cc728 RV	32
4e89a787 TT	33	KSTM_MODULE_GLOBALS();
4e89a787 TT	34
707cc728	35	static char *test_buffer __initdata;
331e4deb	36	static char *alloced_buffer __initdata;
707cc728	37
5ead723a TT	38	extern bool no_hash_pointers;
5ead723a TT	39
707cc728 RV	40	static int __printf(4, 0) __init
	41	do_test(int bufsize, const char *expect, int elen,
	42	const char *fmt, va_list ap)
	43	{
	44	va_list aq;
	45	int ret, written;
	46
	47	total_tests++;
	48
331e4deb	49	memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE);
707cc728 RV	50	va_copy(aq, ap);
	51	ret = vsnprintf(test_buffer, bufsize, fmt, aq);
	52	va_end(aq);
	53
	54	if (ret != elen) {
	55	pr_warn("vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n",
	56	bufsize, fmt, ret, elen);
	57	return 1;
	58	}
	59
331e4deb RV	60	if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) {
	61	pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", bufsize, fmt);
	62	return 1;
	63	}
	64
707cc728	65	if (!bufsize) {
331e4deb	66	if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) {
707cc728 RV	67	pr_warn("vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n",
	68	fmt);
	69	return 1;
	70	}
	71	return 0;
	72	}
	73
	74	written = min(bufsize-1, elen);
	75	if (test_buffer[written]) {
	76	pr_warn("vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n",
	77	bufsize, fmt);
	78	return 1;
	79	}
	80
331e4deb RV	81	if (memchr_inv(test_buffer + written + 1, FILL_CHAR, BUF_SIZE + PAD_SIZE - (written + 1))) {
	82	pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n",
	83	bufsize, fmt);
	84	return 1;
	85	}
	86
707cc728 RV	87	if (memcmp(test_buffer, expect, written)) {
	88	pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n",
	89	bufsize, fmt, test_buffer, written, expect);
	90	return 1;
	91	}
	92	return 0;
	93	}
	94
	95	static void __printf(3, 4) __init
	96	__test(const char expect, int elen, const char fmt, ...)
	97	{
	98	va_list ap;
	99	int rand;
	100	char *p;
	101
fd0515d5 RV	102	if (elen >= BUF_SIZE) {
	103	pr_err("error in test suite: expected output length %d too long. Format was '%s'.\n",
	104	elen, fmt);
	105	failed_tests++;
	106	return;
	107	}
707cc728 RV	108
	109	va_start(ap, fmt);
	110
	111	/*
	112	* Every fmt+args is subjected to four tests: Three where we
	113	* tell vsnprintf varying buffer sizes (plenty, not quite
	114	* enough and 0), and then we also test that kvasprintf would
	115	* be able to print it as expected.
	116	*/
	117	failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap);
	118	rand = 1 + prandom_u32_max(elen+1);
	119	/* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */
	120	failed_tests += do_test(rand, expect, elen, fmt, ap);
	121	failed_tests += do_test(0, expect, elen, fmt, ap);
	122
	123	p = kvasprintf(GFP_KERNEL, fmt, ap);
	124	if (p) {
b79a7db3	125	total_tests++;
707cc728 RV	126	if (memcmp(p, expect, elen+1)) {
	127	pr_warn("kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n",
	128	fmt, p, expect);
	129	failed_tests++;
	130	}
	131	kfree(p);
	132	}
	133	va_end(ap);
	134	}
	135
	136	#define test(expect, fmt, ...) \
	137	__test(expect, strlen(expect), fmt, ##__VA_ARGS__)
	138
	139	static void __init
	140	test_basic(void)
	141	{
	142	/* Work around annoying "warning: zero-length gnu_printf format string". */
	143	char nul = '\0';
	144
	145	test("", &nul);
	146	test("100%", "100%%");
	147	test("xxx%yyy", "xxx%cyyy", '%');
	148	__test("xxx\0yyy", 7, "xxx%cyyy", '\0');
	149	}
	150
	151	static void __init
	152	test_number(void)
	153	{
	154	test("0x1234abcd ", "%#-12x", 0x1234abcd);
	155	test(" 0x1234abcd", "%#12x", 0x1234abcd);
	156	test("0\|001\| 12\|+123\| 1234\|-123\|-1234", "%d\|%03d\|%3d\|%+d\|% d\|%+d\|% d", 0, 1, 12, 123, 1234, -123, -1234);
1ca8e8eb RV	157	test("0\|1\|1\|128\|255", "%hhu\|%hhu\|%hhu\|%hhu\|%hhu", 0, 1, 257, 128, -1);
	158	test("0\|1\|1\|-128\|-1", "%hhd\|%hhd\|%hhd\|%hhd\|%hhd", 0, 1, 257, 128, -1);
	159	test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627);
	160	/*
	161	* POSIX/C99: »The result of converting zero with an explicit
	162	* precision of zero shall be no characters.« Hence the output
	163	* from the below test should really be "00\|0\|\|\| ". However,
	164	* the kernel's printf also produces a single 0 in that
	165	* case. This test case simply documents the current
	166	* behaviour.
	167	*/
	168	test("00\|0\|0\|0\|0", "%.2d\|%.1d\|%.0d\|%.*d\|%1.0d", 0, 0, 0, 0, 0, 0);
	169	#ifndef __CHAR_UNSIGNED__
	170	{
	171	/*
	172	* Passing a 'char' to a %02x specifier doesn't do
	173	* what was presumably the intention when char is
	174	* signed and the value is negative. One must either &
	175	* with 0xff or cast to u8.
	176	*/
	177	char val = -16;
	178	test("0xfffffff0\|0xf0\|0xf0", "%#02x\|%#02x\|%#02x", val, val & 0xff, (u8)val);
	179	}
	180	#endif
707cc728 RV	181	}
	182
	183	static void __init
	184	test_string(void)
	185	{
	186	test("", "%s%.0s", "", "123");
	187	test("ABCD\|abc\|123", "%s\|%.3s\|%.*s", "ABCD", "abcdef", 3, "123456");
	188	test("1 \| 2\|3 \| 4\|5 ", "%-3s\|%3s\|%-s\|%s\|%*s", "1", "2", 3, "3", 3, "4", -3, "5");
f176eb4c RV	189	test("1234 ", "%-10.4s", "123456");
f176eb4c RV	190	test(" 1234", "%10.4s", "123456");
707cc728	191	/*
f176eb4c RV	192	* POSIX and C99 say that a negative precision (which is only
	193	* possible to pass via a * argument) should be treated as if
	194	* the precision wasn't present, and that if the precision is
	195	* omitted (as in %.s), the precision should be taken to be
	196	* 0. However, the kernel's printf behave exactly opposite,
	197	* treating a negative precision as 0 and treating an omitted
	198	* precision specifier as if no precision was given.
	199	*
	200	* These test cases document the current behaviour; should
	201	* anyone ever feel the need to follow the standards more
	202	* closely, this can be revisited.
707cc728	203	*/
f176eb4c RV	204	test(" ", "%4.*s", -5, "123456");
f176eb4c RV	205	test("123456", "%.s", "123456");
707cc728 RV	206	test("a\|\|", "%.s\|%.0s\|%.*s", "a", "b", 0, "c");
	207	test("a \| \| ", "%-3.s\|%-3.0s\|%-3.*s", "a", "b", 0, "c");
	208	}
	209
ad67b74d TH	210	#define PLAIN_BUF_SIZE 64 /* leave some space so we don't oops */
	211
	212	#if BITS_PER_LONG == 64
	213
	214	#define PTR_WIDTH 16
c604b407	215	#define PTR ((void *)0xffff0123456789abUL)
ad67b74d	216	#define PTR_STR "ffff0123456789ab"
ce041c43	217	#define PTR_VAL_NO_CRNG "(____ptrval____)"
ad67b74d	218	#define ZEROS "00000000" /* hex 32 zero bits */
7bd57fbc	219	#define ONES "ffffffff" /* hex 32 one bits */
ad67b74d TH	220
	221	static int __init
	222	plain_format(void)
	223	{
	224	char buf[PLAIN_BUF_SIZE];
	225	int nchars;
	226
	227	nchars = snprintf(buf, PLAIN_BUF_SIZE, "%p", PTR);
	228
ce041c43 TE	229	if (nchars != PTR_WIDTH)
	230	return -1;
	231
	232	if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
	233	pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
	234	PTR_VAL_NO_CRNG);
	235	return 0;
	236	}
	237
	238	if (strncmp(buf, ZEROS, strlen(ZEROS)) != 0)
ad67b74d TH	239	return -1;
	240
	241	return 0;
	242	}
	243
	244	#else
	245
	246	#define PTR_WIDTH 8
	247	#define PTR ((void *)0x456789ab)
	248	#define PTR_STR "456789ab"
ce041c43	249	#define PTR_VAL_NO_CRNG "(ptrval)"
3e5903eb	250	#define ZEROS ""
7bd57fbc	251	#define ONES ""
ad67b74d TH	252
	253	static int __init
	254	plain_format(void)
	255	{
	256	/* Format is implicitly tested for 32 bit machines by plain_hash() */
	257	return 0;
	258	}
	259
	260	#endif /* BITS_PER_LONG == 64 */
	261
	262	static int __init
4d42c447	263	plain_hash_to_buffer(const void p, char buf, size_t len)
ad67b74d	264	{
ad67b74d TH	265	int nchars;
ad67b74d TH	266
4d42c447	267	nchars = snprintf(buf, len, "%p", p);
ad67b74d	268
ce041c43 TE	269	if (nchars != PTR_WIDTH)
	270	return -1;
	271
	272	if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {
	273	pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",
	274	PTR_VAL_NO_CRNG);
	275	return 0;
	276	}
	277
4d42c447 AS	278	return 0;
	279	}
	280
4d42c447 AS	281	static int __init
	282	plain_hash(void)
	283	{
	284	char buf[PLAIN_BUF_SIZE];
	285	int ret;
	286
	287	ret = plain_hash_to_buffer(PTR, buf, PLAIN_BUF_SIZE);
	288	if (ret)
	289	return ret;
	290
ce041c43	291	if (strncmp(buf, PTR_STR, PTR_WIDTH) == 0)
ad67b74d TH	292	return -1;
	293
	294	return 0;
	295	}
	296
	297	/*
	298	* We can't use test() to test %p because we don't know what output to expect
	299	* after an address is hashed.
	300	*/
707cc728 RV	301	static void __init
	302	plain(void)
	303	{
ad67b74d	304	int err;
707cc728	305
5ead723a TT	306	if (no_hash_pointers) {
	307	pr_warn("skipping plain 'p' tests");
	308	skipped_tests += 2;
	309	return;
	310	}
	311
ad67b74d TH	312	err = plain_hash();
	313	if (err) {
	314	pr_warn("plain 'p' does not appear to be hashed\n");
	315	failed_tests++;
	316	return;
	317	}
	318
	319	err = plain_format();
	320	if (err) {
	321	pr_warn("hashing plain 'p' has unexpected format\n");
	322	failed_tests++;
	323	}
707cc728 RV	324	}
707cc728 RV	325
4d42c447 AS	326	static void __init
	327	test_hashed(const char fmt, const void p)
	328	{
	329	char buf[PLAIN_BUF_SIZE];
	330	int ret;
	331
	332	/*
	333	* No need to increase failed test counter since this is assumed
	334	* to be called after plain().
	335	*/
	336	ret = plain_hash_to_buffer(p, buf, PLAIN_BUF_SIZE);
	337	if (ret)
	338	return;
	339
	340	test(buf, fmt, p);
	341	}
	342
7bd57fbc ID	343	/*
	344	* NULL pointers aren't hashed.
	345	*/
3e5903eb PM	346	static void __init
	347	null_pointer(void)
	348	{
7bd57fbc	349	test(ZEROS "00000000", "%p", NULL);
3e5903eb PM	350	test(ZEROS "00000000", "%px", NULL);
	351	test("(null)", "%pE", NULL);
	352	}
	353
7bd57fbc ID	354	/*
	355	* Error pointers aren't hashed.
	356	*/
	357	static void __init
	358	error_pointer(void)
	359	{
	360	test(ONES "fffffff5", "%p", ERR_PTR(-11));
	361	test(ONES "fffffff5", "%px", ERR_PTR(-11));
	362	test("(efault)", "%pE", ERR_PTR(-11));
	363	}
	364
3e5903eb PM	365	#define PTR_INVALID ((void *)0x000000ab)
	366
	367	static void __init
	368	invalid_pointer(void)
	369	{
	370	test_hashed("%p", PTR_INVALID);
	371	test(ZEROS "000000ab", "%px", PTR_INVALID);
	372	test("(efault)", "%pE", PTR_INVALID);
	373	}
	374
707cc728 RV	375	static void __init
	376	symbol_ptr(void)
	377	{
	378	}
	379
	380	static void __init
	381	kernel_ptr(void)
	382	{
ad67b74d	383	/* We can't test this without access to kptr_restrict. */
707cc728 RV	384	}
	385
	386	static void __init
	387	struct_resource(void)
	388	{
	389	}
	390
	391	static void __init
	392	addr(void)
	393	{
	394	}
	395
	396	static void __init
	397	escaped_str(void)
	398	{
	399	}
	400
	401	static void __init
	402	hex_string(void)
	403	{
	404	const char buf[3] = {0xc0, 0xff, 0xee};
	405
	406	test("c0 ff ee\|c0:ff:ee\|c0-ff-ee\|c0ffee",
	407	"%3ph\|%3phC\|%3phD\|%3phN", buf, buf, buf, buf);
	408	test("c0 ff ee\|c0:ff:ee\|c0-ff-ee\|c0ffee",
	409	"%ph\|%phC\|%phD\|%phN", 3, buf, 3, buf, 3, buf, 3, buf);
	410	}
	411
	412	static void __init
	413	mac(void)
	414	{
	415	const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05};
	416
	417	test("2d:48:d6:fc:7a:05", "%pM", addr);
	418	test("05:7a:fc:d6:48:2d", "%pMR", addr);
	419	test("2d-48-d6-fc-7a-05", "%pMF", addr);
	420	test("2d48d6fc7a05", "%pm", addr);
	421	test("057afcd6482d", "%pmR", addr);
	422	}
	423
	424	static void __init
	425	ip4(void)
	426	{
	427	struct sockaddr_in sa;
	428
	429	sa.sin_family = AF_INET;
	430	sa.sin_port = cpu_to_be16(12345);
	431	sa.sin_addr.s_addr = cpu_to_be32(0x7f000001);
	432
	433	test("127.000.000.001\|127.0.0.1", "%pi4\|%pI4", &sa.sin_addr, &sa.sin_addr);
	434	test("127.000.000.001\|127.0.0.1", "%piS\|%pIS", &sa, &sa);
	435	sa.sin_addr.s_addr = cpu_to_be32(0x01020304);
	436	test("001.002.003.004:12345\|1.2.3.4:12345", "%piSp\|%pISp", &sa, &sa);
	437	}
	438
	439	static void __init
	440	ip6(void)
	441	{
	442	}
	443
	444	static void __init
	445	ip(void)
	446	{
	447	ip4();
448	ip6();
449	}
450
451	static void __init
452	uuid(void)
453	{
454	const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
455	0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};
456
457	test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid);
458	test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid);
459	test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid);
460	test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid);
461	}
462
251c7234 RV	463	static struct dentry test_dentry[4] __initdata = {
	464	{ .d_parent = &test_dentry[0],
	465	.d_name = QSTR_INIT(test_dentry[0].d_iname, 3),
	466	.d_iname = "foo" },
	467	{ .d_parent = &test_dentry[0],
	468	.d_name = QSTR_INIT(test_dentry[1].d_iname, 5),
	469	.d_iname = "bravo" },
	470	{ .d_parent = &test_dentry[1],
	471	.d_name = QSTR_INIT(test_dentry[2].d_iname, 4),
	472	.d_iname = "alfa" },
	473	{ .d_parent = &test_dentry[2],
	474	.d_name = QSTR_INIT(test_dentry[3].d_iname, 5),
	475	.d_iname = "romeo" },
	476	};
	477
707cc728 RV	478	static void __init
	479	dentry(void)
	480	{
251c7234 RV	481	test("foo", "%pd", &test_dentry[0]);
	482	test("foo", "%pd2", &test_dentry[0]);
	483
cf6b7921 JH	484	test("(null)", "%pd", NULL);
cf6b7921 JH	485	test("(efault)", "%pd", PTR_INVALID);
cf6b7921 JH	486	test("(null)", "%pD", NULL);
	487	test("(efault)", "%pD", PTR_INVALID);
	488
251c7234 RV	489	test("romeo", "%pd", &test_dentry[3]);
	490	test("alfa/romeo", "%pd2", &test_dentry[3]);
	491	test("bravo/alfa/romeo", "%pd3", &test_dentry[3]);
	492	test("/bravo/alfa/romeo", "%pd4", &test_dentry[3]);
	493	test("/bravo/alfa", "%pd4", &test_dentry[2]);
	494
	495	test("bravo/alfa \|bravo/alfa ", "%-12pd2\|%*pd2", &test_dentry[2], -12, &test_dentry[2]);
	496	test(" bravo/alfa\| bravo/alfa", "%12pd2\|%*pd2", &test_dentry[2], 12, &test_dentry[2]);
707cc728 RV	497	}
	498
	499	static void __init
	500	struct_va_format(void)
	501	{
	502	}
	503
4d42c447	504	static void __init
7daac5b2	505	time_and_date(void)
4d42c447 AS	506	{
	507	/* 1543210543 */
	508	const struct rtc_time tm = {
	509	.tm_sec = 43,
	510	.tm_min = 35,
	511	.tm_hour = 5,
	512	.tm_mday = 26,
	513	.tm_mon = 10,
	514	.tm_year = 118,
	515	};
7daac5b2 AS	516	/* 2019-01-04T15:32:23 */
7daac5b2 AS	517	time64_t t = 1546615943;
4d42c447	518
7daac5b2	519	test("(%pt?)", "%pt", &tm);
4d42c447 AS	520	test("2018-11-26T05:35:43", "%ptR", &tm);
	521	test("0118-10-26T05:35:43", "%ptRr", &tm);
	522	test("05:35:43\|2018-11-26", "%ptRt\|%ptRd", &tm, &tm);
	523	test("05:35:43\|0118-10-26", "%ptRtr\|%ptRdr", &tm, &tm);
	524	test("05:35:43\|2018-11-26", "%ptRttr\|%ptRdtr", &tm, &tm);
	525	test("05:35:43 tr\|2018-11-26 tr", "%ptRt tr\|%ptRd tr", &tm, &tm);
7daac5b2 AS	526
	527	test("2019-01-04T15:32:23", "%ptT", &t);
	528	test("0119-00-04T15:32:23", "%ptTr", &t);
	529	test("15:32:23\|2019-01-04", "%ptTt\|%ptTd", &t, &t);
	530	test("15:32:23\|0119-00-04", "%ptTtr\|%ptTdr", &t, &t);
4d42c447 AS	531	}
4d42c447 AS	532
707cc728 RV	533	static void __init
	534	struct_clk(void)
	535	{
	536	}
	537
857cca4d RV	538	static void __init
	539	large_bitmap(void)
	540	{
	541	const int nbits = 1 << 16;
2821fd0c	542	unsigned long *bits = bitmap_zalloc(nbits, GFP_KERNEL);
857cca4d RV	543	if (!bits)
	544	return;
	545
	546	bitmap_set(bits, 1, 20);
	547	bitmap_set(bits, 60000, 15);
	548	test("1-20,60000-60014", "%*pbl", nbits, bits);
2821fd0c	549	bitmap_free(bits);
857cca4d RV	550	}
857cca4d RV	551
707cc728 RV	552	static void __init
	553	bitmap(void)
	554	{
	555	DECLARE_BITMAP(bits, 20);
	556	const int primes[] = {2,3,5,7,11,13,17,19};
	557	int i;
	558
	559	bitmap_zero(bits, 20);
	560	test("00000\|00000", "%20pb\|%*pb", bits, 20, bits);
	561	test("\|", "%20pbl\|%*pbl", bits, 20, bits);
	562
	563	for (i = 0; i < ARRAY_SIZE(primes); ++i)
	564	set_bit(primes[i], bits);
	565	test("a28ac\|a28ac", "%20pb\|%*pb", bits, 20, bits);
	566	test("2-3,5,7,11,13,17,19\|2-3,5,7,11,13,17,19", "%20pbl\|%*pbl", bits, 20, bits);
	567
	568	bitmap_fill(bits, 20);
	569	test("fffff\|fffff", "%20pb\|%*pb", bits, 20, bits);
	570	test("0-19\|0-19", "%20pbl\|%*pbl", bits, 20, bits);
857cca4d RV	571
857cca4d RV	572	large_bitmap();
707cc728 RV	573	}
	574
	575	static void __init
	576	netdev_features(void)
	577	{
	578	}
	579
edf14cdb VB	580	static void __init
	581	flags(void)
	582	{
	583	unsigned long flags;
	584	gfp_t gfp;
	585	char *cmp_buffer;
	586
	587	flags = 0;
	588	test("", "%pGp", &flags);
	589
	590	/* Page flags should filter the zone id */
	591	flags = 1UL << NR_PAGEFLAGS;
	592	test("", "%pGp", &flags);
	593
	594	flags \|= 1UL << PG_uptodate \| 1UL << PG_dirty \| 1UL << PG_lru
	595	\| 1UL << PG_active \| 1UL << PG_swapbacked;
	596	test("uptodate\|dirty\|lru\|active\|swapbacked", "%pGp", &flags);
	597
	598
	599	flags = VM_READ \| VM_EXEC \| VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC
	600	\| VM_DENYWRITE;
	601	test("read\|exec\|mayread\|maywrite\|mayexec\|denywrite", "%pGv", &flags);
	602
	603	gfp = GFP_TRANSHUGE;
	604	test("GFP_TRANSHUGE", "%pGg", &gfp);
	605
	606	gfp = GFP_ATOMIC\|__GFP_DMA;
	607	test("GFP_ATOMIC\|GFP_DMA", "%pGg", &gfp);
	608
	609	gfp = __GFP_ATOMIC;
	610	test("__GFP_ATOMIC", "%pGg", &gfp);
	611
	612	cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL);
	613	if (!cmp_buffer)
	614	return;
	615
	616	/* Any flags not translated by the table should remain numeric */
	617	gfp = ~__GFP_BITS_MASK;
	618	snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp);
	619	test(cmp_buffer, "%pGg", &gfp);
	620
	621	snprintf(cmp_buffer, BUF_SIZE, "__GFP_ATOMIC\|%#lx",
	622	(unsigned long) gfp);
	623	gfp \|= __GFP_ATOMIC;
	624	test(cmp_buffer, "%pGg", &gfp);
	625
	626	kfree(cmp_buffer);
	627	}
	628
f1ce39df SA	629	static void __init fwnode_pointer(void)
	630	{
	631	const struct software_node softnodes[] = {
	632	{ .name = "first", },
	633	{ .name = "second", .parent = &softnodes[0], },
	634	{ .name = "third", .parent = &softnodes[1], },
	635	{ NULL /* Guardian */ }
	636	};
	637	const char * const full_name = "first/second/third";
	638	const char * const full_name_second = "first/second";
	639	const char * const second_name = "second";
	640	const char * const third_name = "third";
	641	int rval;
	642
	643	rval = software_node_register_nodes(softnodes);
	644	if (rval) {
	645	pr_warn("cannot register softnodes; rval %d\n", rval);
	646	return;
	647	}
	648
	649	test(full_name_second, "%pfw", software_node_fwnode(&softnodes[1]));
	650	test(full_name, "%pfw", software_node_fwnode(&softnodes[2]));
	651	test(full_name, "%pfwf", software_node_fwnode(&softnodes[2]));
	652	test(second_name, "%pfwP", software_node_fwnode(&softnodes[1]));
	653	test(third_name, "%pfwP", software_node_fwnode(&softnodes[2]));
	654
f0328be5	655	software_node_unregister_nodes(softnodes);
f1ce39df SA	656	}
f1ce39df SA	657
57f5677e RV	658	static void __init
	659	errptr(void)
	660	{
	661	test("-1234", "%pe", ERR_PTR(-1234));
	662
	663	/* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */
	664	BUILD_BUG_ON(IS_ERR(PTR));
	665	test_hashed("%pe", PTR);
	666
	667	#ifdef CONFIG_SYMBOLIC_ERRNAME
	668	test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK));
	669	test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN));
	670	BUILD_BUG_ON(EAGAIN != EWOULDBLOCK);
	671	test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK));
	672	test("[-EIO ]", "[%-8pe]", ERR_PTR(-EIO));
	673	test("[ -EIO]", "[%8pe]", ERR_PTR(-EIO));
	674	test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER));
	675	#endif
	676	}
	677
707cc728 RV	678	static void __init
	679	test_pointer(void)
	680	{
	681	plain();
3e5903eb	682	null_pointer();
7bd57fbc	683	error_pointer();
3e5903eb	684	invalid_pointer();
707cc728 RV	685	symbol_ptr();
	686	kernel_ptr();
	687	struct_resource();
	688	addr();
	689	escaped_str();
	690	hex_string();
	691	mac();
	692	ip();
	693	uuid();
	694	dentry();
	695	struct_va_format();
7daac5b2	696	time_and_date();
707cc728 RV	697	struct_clk();
	698	bitmap();
	699	netdev_features();
edf14cdb	700	flags();
57f5677e	701	errptr();
f1ce39df	702	fwnode_pointer();
707cc728 RV	703	}
707cc728 RV	704
6b1a4d5b	705	static void __init selftest(void)
707cc728	706	{
331e4deb RV	707	alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
331e4deb RV	708	if (!alloced_buffer)
6b1a4d5b	709	return;
331e4deb	710	test_buffer = alloced_buffer + PAD_SIZE;
707cc728 RV	711
	712	test_basic();
	713	test_number();
	714	test_string();
	715	test_pointer();
	716
331e4deb	717	kfree(alloced_buffer);
707cc728 RV	718	}
707cc728 RV	719
6b1a4d5b	720	KSTM_MODULE_LOADERS(test_printf);
707cc728 RV	721	MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");
707cc728 RV	722	MODULE_LICENSE("GPL");