// SPDX-License-Identifier: GPL-2.0+/* * Test cases for API provided by cmdline.c */ #include <kunit/test.h>#include <linux/kernel.h>#include <linux/random.h>#include <linux/string.h> static const char *cmdline_test_strings[] = {	"\"\"", ""  , "=" , "\"-", ","    , "-,"   , ",-"   , "-" ,	"+,"  , "--", ",,", "''" , "\"\",", "\",\"", "-\"\"", "\"",}; static const int cmdline_test_values[] = {	1, 1, 1, 1, 2, 3, 2, 3,	1, 3, 2, 1, 1, 1, 3, 1,}; static_assert(ARRAY_SIZE(cmdline_test_strings) == ARRAY_SIZE(cmdline_test_values)); static const char *cmdline_test_range_strings[] = {	"-7" , "--7"  , "-1-2"    , "7--9",	"7-" , "-7--9", "7-9,"    , "9-7" ,	"5-a", "a-5"  , "5-8"     , ",8-5",	"+,1", "-,4"  , "-3,0-1,6", "4,-" ,	" +2", " -9"  , "0-1,-3,6", "- 9" ,}; static const int cmdline_test_range_values[][16] = {	{ 1, -7, }, { 0, -0, }, { 4, -1, 0, +1, 2, }, { 0, 7, },	{ 0, +7, }, { 0, -7, }, { 3, +7, 8, +9, 0, }, { 0, 9, },	{ 0, +5, }, { 0, -0, }, { 4, +5, 6, +7, 8, }, { 0, 0, },	{ 0, +0, }, { 0, -0, }, { 4, -3, 0, +1, 6, }, { 1, 4, },	{ 0, +0, }, { 0, -0, }, { 4, +0, 1, -3, 6, }, { 0, 0, },}; static_assert(ARRAY_SIZE(cmdline_test_range_strings) == ARRAY_SIZE(cmdline_test_range_values)); static void cmdline_do_one_test(struct kunit *test, const char *in, int rc, int offset){	const char *fmt = "Pattern: %s";	const char *out = in;	int dummy;	int ret; 	ret = get_option((char **)&out, &dummy); 	KUNIT_EXPECT_EQ_MSG(test, ret, rc, fmt, in);	KUNIT_EXPECT_PTR_EQ_MSG(test, out, in + offset, fmt, in);} static void cmdline_test_noint(struct kunit *test){	unsigned int i = 0; 	do {		const char *str = cmdline_test_strings[i];		int rc = 0;		int offset; 		/* Only first and leading '-' will advance the pointer */		offset = !!(*str == '-');		cmdline_do_one_test(test, str, rc, offset);	} while (++i < ARRAY_SIZE(cmdline_test_strings));} static void cmdline_test_lead_int(struct kunit *test){	unsigned int i = 0;	char in[32]; 	do {		const char *str = cmdline_test_strings[i];		int rc = cmdline_test_values[i];		int offset; 		sprintf(in, "%u%s", get_random_u8(), str);		/* Only first '-' after the number will advance the pointer */		offset = strlen(in) - strlen(str) + !!(rc == 2);		cmdline_do_one_test(test, in, rc, offset);	} while (++i < ARRAY_SIZE(cmdline_test_strings));} static void cmdline_test_tail_int(struct kunit *test){	unsigned int i = 0;	char in[32]; 	do {		const char *str = cmdline_test_strings[i];		/* When "" or "-" the result will be valid integer */		int rc = strcmp(str, "") ? (strcmp(str, "-") ? 0 : 1) : 1;		int offset; 		sprintf(in, "%s%u", str, get_random_u8());		/*		 * Only first and leading '-' not followed by integer		 * will advance the pointer.		 */		offset = rc ? strlen(in) : !!(*str == '-');		cmdline_do_one_test(test, in, rc, offset);	} while (++i < ARRAY_SIZE(cmdline_test_strings));} static void cmdline_do_one_range_test(struct kunit *test, const char *in,				      unsigned int n, const int *e){	unsigned int i;	int r[16];	int *p; 	memset(r, 0, sizeof(r));	get_options(in, ARRAY_SIZE(r), r);	KUNIT_EXPECT_EQ_MSG(test, r[0], e[0], "in test %u (parsed) expected %d numbers, got %d",			    n, e[0], r[0]);	for (i = 1; i < ARRAY_SIZE(r); i++)		KUNIT_EXPECT_EQ_MSG(test, r[i], e[i], "in test %u at %u", n, i); 	memset(r, 0, sizeof(r));	get_options(in, 0, r);	KUNIT_EXPECT_EQ_MSG(test, r[0], e[0], "in test %u (validated) expected %d numbers, got %d",			    n, e[0], r[0]); 	p = memchr_inv(&r[1], 0, sizeof(r) - sizeof(r[0]));	KUNIT_EXPECT_PTR_EQ_MSG(test, p, NULL, "in test %u at %td out of bound", n, p - r);} static void cmdline_test_range(struct kunit *test){	unsigned int i = 0; 	do {		const char *str = cmdline_test_range_strings[i];		const int *e = cmdline_test_range_values[i]; 		cmdline_do_one_range_test(test, str, i, e);	} while (++i < ARRAY_SIZE(cmdline_test_range_strings));} static struct kunit_case cmdline_test_cases[] = {	KUNIT_CASE(cmdline_test_noint),	KUNIT_CASE(cmdline_test_lead_int),	KUNIT_CASE(cmdline_test_tail_int),	KUNIT_CASE(cmdline_test_range),	{}}; static struct kunit_suite cmdline_test_suite = {	.name = "cmdline",	.test_cases = cmdline_test_cases,};kunit_test_suite(cmdline_test_suite); MODULE_DESCRIPTION("Test cases for API provided by cmdline.c");MODULE_LICENSE("GPL");