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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Test cases for API provided by cmdline.c4 */5 6#include <kunit/test.h>7#include <linux/kernel.h>8#include <linux/random.h>9#include <linux/string.h>10 11static const char *cmdline_test_strings[] = {12 "\"\"", "" , "=" , "\"-", "," , "-," , ",-" , "-" ,13 "+," , "--", ",,", "''" , "\"\",", "\",\"", "-\"\"", "\"",14};15 16static const int cmdline_test_values[] = {17 1, 1, 1, 1, 2, 3, 2, 3,18 1, 3, 2, 1, 1, 1, 3, 1,19};20 21static_assert(ARRAY_SIZE(cmdline_test_strings) == ARRAY_SIZE(cmdline_test_values));22 23static const char *cmdline_test_range_strings[] = {24 "-7" , "--7" , "-1-2" , "7--9",25 "7-" , "-7--9", "7-9," , "9-7" ,26 "5-a", "a-5" , "5-8" , ",8-5",27 "+,1", "-,4" , "-3,0-1,6", "4,-" ,28 " +2", " -9" , "0-1,-3,6", "- 9" ,29};30 31static const int cmdline_test_range_values[][16] = {32 { 1, -7, }, { 0, -0, }, { 4, -1, 0, +1, 2, }, { 0, 7, },33 { 0, +7, }, { 0, -7, }, { 3, +7, 8, +9, 0, }, { 0, 9, },34 { 0, +5, }, { 0, -0, }, { 4, +5, 6, +7, 8, }, { 0, 0, },35 { 0, +0, }, { 0, -0, }, { 4, -3, 0, +1, 6, }, { 1, 4, },36 { 0, +0, }, { 0, -0, }, { 4, +0, 1, -3, 6, }, { 0, 0, },37};38 39static_assert(ARRAY_SIZE(cmdline_test_range_strings) == ARRAY_SIZE(cmdline_test_range_values));40 41static void cmdline_do_one_test(struct kunit *test, const char *in, int rc, int offset)42{43 const char *fmt = "Pattern: %s";44 const char *out = in;45 int dummy;46 int ret;47 48 ret = get_option((char **)&out, &dummy);49 50 KUNIT_EXPECT_EQ_MSG(test, ret, rc, fmt, in);51 KUNIT_EXPECT_PTR_EQ_MSG(test, out, in + offset, fmt, in);52}53 54static void cmdline_test_noint(struct kunit *test)55{56 unsigned int i = 0;57 58 do {59 const char *str = cmdline_test_strings[i];60 int rc = 0;61 int offset;62 63 /* Only first and leading '-' will advance the pointer */64 offset = !!(*str == '-');65 cmdline_do_one_test(test, str, rc, offset);66 } while (++i < ARRAY_SIZE(cmdline_test_strings));67}68 69static void cmdline_test_lead_int(struct kunit *test)70{71 unsigned int i = 0;72 char in[32];73 74 do {75 const char *str = cmdline_test_strings[i];76 int rc = cmdline_test_values[i];77 int offset;78 79 sprintf(in, "%u%s", get_random_u8(), str);80 /* Only first '-' after the number will advance the pointer */81 offset = strlen(in) - strlen(str) + !!(rc == 2);82 cmdline_do_one_test(test, in, rc, offset);83 } while (++i < ARRAY_SIZE(cmdline_test_strings));84}85 86static void cmdline_test_tail_int(struct kunit *test)87{88 unsigned int i = 0;89 char in[32];90 91 do {92 const char *str = cmdline_test_strings[i];93 /* When "" or "-" the result will be valid integer */94 int rc = strcmp(str, "") ? (strcmp(str, "-") ? 0 : 1) : 1;95 int offset;96 97 sprintf(in, "%s%u", str, get_random_u8());98 /*99 * Only first and leading '-' not followed by integer100 * will advance the pointer.101 */102 offset = rc ? strlen(in) : !!(*str == '-');103 cmdline_do_one_test(test, in, rc, offset);104 } while (++i < ARRAY_SIZE(cmdline_test_strings));105}106 107static void cmdline_do_one_range_test(struct kunit *test, const char *in,108 unsigned int n, const int *e)109{110 unsigned int i;111 int r[16];112 int *p;113 114 memset(r, 0, sizeof(r));115 get_options(in, ARRAY_SIZE(r), r);116 KUNIT_EXPECT_EQ_MSG(test, r[0], e[0], "in test %u (parsed) expected %d numbers, got %d",117 n, e[0], r[0]);118 for (i = 1; i < ARRAY_SIZE(r); i++)119 KUNIT_EXPECT_EQ_MSG(test, r[i], e[i], "in test %u at %u", n, i);120 121 memset(r, 0, sizeof(r));122 get_options(in, 0, r);123 KUNIT_EXPECT_EQ_MSG(test, r[0], e[0], "in test %u (validated) expected %d numbers, got %d",124 n, e[0], r[0]);125 126 p = memchr_inv(&r[1], 0, sizeof(r) - sizeof(r[0]));127 KUNIT_EXPECT_PTR_EQ_MSG(test, p, NULL, "in test %u at %td out of bound", n, p - r);128}129 130static void cmdline_test_range(struct kunit *test)131{132 unsigned int i = 0;133 134 do {135 const char *str = cmdline_test_range_strings[i];136 const int *e = cmdline_test_range_values[i];137 138 cmdline_do_one_range_test(test, str, i, e);139 } while (++i < ARRAY_SIZE(cmdline_test_range_strings));140}141 142static struct kunit_case cmdline_test_cases[] = {143 KUNIT_CASE(cmdline_test_noint),144 KUNIT_CASE(cmdline_test_lead_int),145 KUNIT_CASE(cmdline_test_tail_int),146 KUNIT_CASE(cmdline_test_range),147 {}148};149 150static struct kunit_suite cmdline_test_suite = {151 .name = "cmdline",152 .test_cases = cmdline_test_cases,153};154kunit_test_suite(cmdline_test_suite);155 156MODULE_DESCRIPTION("Test cases for API provided by cmdline.c");157MODULE_LICENSE("GPL");158