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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | // 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 %u 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_LICENSE("GPL"); |