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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 | // SPDX-License-Identifier: GPL-2.0 /* * KUnit test of ext4 inode that verify the seconds part of [a/c/m] * timestamps in ext4 inode structs are decoded correctly. */ #include <kunit/test.h> #include <linux/kernel.h> #include <linux/time64.h> #include "ext4.h" /* * For constructing the nonnegative timestamp lower bound value. * binary: 00000000 00000000 00000000 00000000 */ #define LOWER_MSB_0 0L /* * For constructing the nonnegative timestamp upper bound value. * binary: 01111111 11111111 11111111 11111111 * */ #define UPPER_MSB_0 0x7fffffffL /* * For constructing the negative timestamp lower bound value. * binary: 10000000 00000000 00000000 00000000 */ #define LOWER_MSB_1 (-(UPPER_MSB_0) - 1L) /* avoid overflow */ /* * For constructing the negative timestamp upper bound value. * binary: 11111111 11111111 11111111 11111111 */ #define UPPER_MSB_1 (-1L) /* * Upper bound for nanoseconds value supported by the encoding. * binary: 00111111 11111111 11111111 11111111 */ #define MAX_NANOSECONDS ((1L << 30) - 1) #define CASE_NAME_FORMAT "%s: msb:%x lower_bound:%x extra_bits: %x" #define LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE\ "1901-12-13 Lower bound of 32bit < 0 timestamp, no extra bits" #define UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE\ "1969-12-31 Upper bound of 32bit < 0 timestamp, no extra bits" #define LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE\ "1970-01-01 Lower bound of 32bit >=0 timestamp, no extra bits" #define UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE\ "2038-01-19 Upper bound of 32bit >=0 timestamp, no extra bits" #define LOWER_BOUND_NEG_LO_1_CASE\ "2038-01-19 Lower bound of 32bit <0 timestamp, lo extra sec bit on" #define UPPER_BOUND_NEG_LO_1_CASE\ "2106-02-07 Upper bound of 32bit <0 timestamp, lo extra sec bit on" #define LOWER_BOUND_NONNEG_LO_1_CASE\ "2106-02-07 Lower bound of 32bit >=0 timestamp, lo extra sec bit on" #define UPPER_BOUND_NONNEG_LO_1_CASE\ "2174-02-25 Upper bound of 32bit >=0 timestamp, lo extra sec bit on" #define LOWER_BOUND_NEG_HI_1_CASE\ "2174-02-25 Lower bound of 32bit <0 timestamp, hi extra sec bit on" #define UPPER_BOUND_NEG_HI_1_CASE\ "2242-03-16 Upper bound of 32bit <0 timestamp, hi extra sec bit on" #define LOWER_BOUND_NONNEG_HI_1_CASE\ "2242-03-16 Lower bound of 32bit >=0 timestamp, hi extra sec bit on" #define UPPER_BOUND_NONNEG_HI_1_CASE\ "2310-04-04 Upper bound of 32bit >=0 timestamp, hi extra sec bit on" #define UPPER_BOUND_NONNEG_HI_1_NS_1_CASE\ "2310-04-04 Upper bound of 32bit>=0 timestamp, hi extra sec bit 1. 1 ns" #define LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE\ "2378-04-22 Lower bound of 32bit>= timestamp. Extra sec bits 1. Max ns" #define LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE\ "2378-04-22 Lower bound of 32bit >=0 timestamp. All extra sec bits on" #define UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE\ "2446-05-10 Upper bound of 32bit >=0 timestamp. All extra sec bits on" struct timestamp_expectation { const char *test_case_name; struct timespec64 expected; u32 extra_bits; bool msb_set; bool lower_bound; }; static time64_t get_32bit_time(const struct timestamp_expectation * const test) { if (test->msb_set) { if (test->lower_bound) return LOWER_MSB_1; return UPPER_MSB_1; } if (test->lower_bound) return LOWER_MSB_0; return UPPER_MSB_0; } /* * Test data is derived from the table in the Inode Timestamps section of * Documentation/filesystems/ext4/inodes.rst. */ static void inode_test_xtimestamp_decoding(struct kunit *test) { const struct timestamp_expectation test_data[] = { { .test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE, .msb_set = true, .lower_bound = true, .extra_bits = 0, .expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L}, }, { .test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE, .msb_set = true, .lower_bound = false, .extra_bits = 0, .expected = {.tv_sec = -1LL, .tv_nsec = 0L}, }, { .test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE, .msb_set = false, .lower_bound = true, .extra_bits = 0, .expected = {0LL, 0L}, }, { .test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE, .msb_set = false, .lower_bound = false, .extra_bits = 0, .expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L}, }, { .test_case_name = LOWER_BOUND_NEG_LO_1_CASE, .msb_set = true, .lower_bound = true, .extra_bits = 1, .expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L}, }, { .test_case_name = UPPER_BOUND_NEG_LO_1_CASE, .msb_set = true, .lower_bound = false, .extra_bits = 1, .expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L}, }, { .test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE, .msb_set = false, .lower_bound = true, .extra_bits = 1, .expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L}, }, { .test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE, .msb_set = false, .lower_bound = false, .extra_bits = 1, .expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L}, }, { .test_case_name = LOWER_BOUND_NEG_HI_1_CASE, .msb_set = true, .lower_bound = true, .extra_bits = 2, .expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L}, }, { .test_case_name = UPPER_BOUND_NEG_HI_1_CASE, .msb_set = true, .lower_bound = false, .extra_bits = 2, .expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L}, }, { .test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE, .msb_set = false, .lower_bound = true, .extra_bits = 2, .expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L}, }, { .test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE, .msb_set = false, .lower_bound = false, .extra_bits = 2, .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L}, }, { .test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE, .msb_set = false, .lower_bound = false, .extra_bits = 6, .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L}, }, { .test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE, .msb_set = false, .lower_bound = true, .extra_bits = 0xFFFFFFFF, .expected = {.tv_sec = 0x300000000LL, .tv_nsec = MAX_NANOSECONDS}, }, { .test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE, .msb_set = false, .lower_bound = true, .extra_bits = 3, .expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L}, }, { .test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE, .msb_set = false, .lower_bound = false, .extra_bits = 3, .expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L}, } }; struct timespec64 timestamp; int i; for (i = 0; i < ARRAY_SIZE(test_data); ++i) { timestamp.tv_sec = get_32bit_time(&test_data[i]); ext4_decode_extra_time(×tamp, cpu_to_le32(test_data[i].extra_bits)); KUNIT_EXPECT_EQ_MSG(test, test_data[i].expected.tv_sec, timestamp.tv_sec, CASE_NAME_FORMAT, test_data[i].test_case_name, test_data[i].msb_set, test_data[i].lower_bound, test_data[i].extra_bits); KUNIT_EXPECT_EQ_MSG(test, test_data[i].expected.tv_nsec, timestamp.tv_nsec, CASE_NAME_FORMAT, test_data[i].test_case_name, test_data[i].msb_set, test_data[i].lower_bound, test_data[i].extra_bits); } } static struct kunit_case ext4_inode_test_cases[] = { KUNIT_CASE(inode_test_xtimestamp_decoding), {} }; static struct kunit_suite ext4_inode_test_suite = { .name = "ext4_inode_test", .test_cases = ext4_inode_test_cases, }; kunit_test_suite(ext4_inode_test_suite); |