198 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * KUnit tests for FAT filesystems.4 *5 * Copyright (C) 2020 Google LLC.6 * Author: David Gow <davidgow@google.com>7 */8 9#include <kunit/test.h>10 11#include "fat.h"12 13static void fat_checksum_test(struct kunit *test)14{15 /* With no extension. */16 KUNIT_EXPECT_EQ(test, fat_checksum("VMLINUX "), (u8)44);17 /* With 3-letter extension. */18 KUNIT_EXPECT_EQ(test, fat_checksum("README TXT"), (u8)115);19 /* With short (1-letter) extension. */20 KUNIT_EXPECT_EQ(test, fat_checksum("ABCDEFGHA "), (u8)98);21}22 23struct fat_timestamp_testcase {24 const char *name;25 struct timespec64 ts;26 __le16 time;27 __le16 date;28 u8 cs;29 int time_offset;30};31 32static struct fat_timestamp_testcase time_test_cases[] = {33 {34 .name = "Earliest possible UTC (1980-01-01 00:00:00)",35 .ts = {.tv_sec = 315532800LL, .tv_nsec = 0L},36 .time = cpu_to_le16(0),37 .date = cpu_to_le16(33),38 .cs = 0,39 .time_offset = 0,40 },41 {42 .name = "Latest possible UTC (2107-12-31 23:59:58)",43 .ts = {.tv_sec = 4354819198LL, .tv_nsec = 0L},44 .time = cpu_to_le16(49021),45 .date = cpu_to_le16(65439),46 .cs = 0,47 .time_offset = 0,48 },49 {50 .name = "Earliest possible (UTC-11) (== 1979-12-31 13:00:00 UTC)",51 .ts = {.tv_sec = 315493200LL, .tv_nsec = 0L},52 .time = cpu_to_le16(0),53 .date = cpu_to_le16(33),54 .cs = 0,55 .time_offset = 11 * 60,56 },57 {58 .name = "Latest possible (UTC+11) (== 2108-01-01 10:59:58 UTC)",59 .ts = {.tv_sec = 4354858798LL, .tv_nsec = 0L},60 .time = cpu_to_le16(49021),61 .date = cpu_to_le16(65439),62 .cs = 0,63 .time_offset = -11 * 60,64 },65 {66 .name = "Leap Day / Year (1996-02-29 00:00:00)",67 .ts = {.tv_sec = 825552000LL, .tv_nsec = 0L},68 .time = cpu_to_le16(0),69 .date = cpu_to_le16(8285),70 .cs = 0,71 .time_offset = 0,72 },73 {74 .name = "Year 2000 is leap year (2000-02-29 00:00:00)",75 .ts = {.tv_sec = 951782400LL, .tv_nsec = 0L},76 .time = cpu_to_le16(0),77 .date = cpu_to_le16(10333),78 .cs = 0,79 .time_offset = 0,80 },81 {82 .name = "Year 2100 not leap year (2100-03-01 00:00:00)",83 .ts = {.tv_sec = 4107542400LL, .tv_nsec = 0L},84 .time = cpu_to_le16(0),85 .date = cpu_to_le16(61537),86 .cs = 0,87 .time_offset = 0,88 },89 {90 .name = "Leap year + timezone UTC+1 (== 2004-02-29 00:30:00 UTC)",91 .ts = {.tv_sec = 1078014600LL, .tv_nsec = 0L},92 .time = cpu_to_le16(48064),93 .date = cpu_to_le16(12380),94 .cs = 0,95 .time_offset = -60,96 },97 {98 .name = "Leap year + timezone UTC-1 (== 2004-02-29 23:30:00 UTC)",99 .ts = {.tv_sec = 1078097400LL, .tv_nsec = 0L},100 .time = cpu_to_le16(960),101 .date = cpu_to_le16(12385),102 .cs = 0,103 .time_offset = 60,104 },105 {106 .name = "VFAT odd-second resolution (1999-12-31 23:59:59)",107 .ts = {.tv_sec = 946684799LL, .tv_nsec = 0L},108 .time = cpu_to_le16(49021),109 .date = cpu_to_le16(10143),110 .cs = 100,111 .time_offset = 0,112 },113 {114 .name = "VFAT 10ms resolution (1980-01-01 00:00:00:0010)",115 .ts = {.tv_sec = 315532800LL, .tv_nsec = 10000000L},116 .time = cpu_to_le16(0),117 .date = cpu_to_le16(33),118 .cs = 1,119 .time_offset = 0,120 },121};122 123static void time_testcase_desc(struct fat_timestamp_testcase *t,124 char *desc)125{126 strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);127}128 129KUNIT_ARRAY_PARAM(fat_time, time_test_cases, time_testcase_desc);130 131static void fat_time_fat2unix_test(struct kunit *test)132{133 static struct msdos_sb_info fake_sb;134 struct timespec64 ts;135 struct fat_timestamp_testcase *testcase =136 (struct fat_timestamp_testcase *)test->param_value;137 138 fake_sb.options.tz_set = 1;139 fake_sb.options.time_offset = testcase->time_offset;140 141 fat_time_fat2unix(&fake_sb, &ts,142 testcase->time,143 testcase->date,144 testcase->cs);145 KUNIT_EXPECT_EQ_MSG(test,146 testcase->ts.tv_sec,147 ts.tv_sec,148 "Timestamp mismatch (seconds)\n");149 KUNIT_EXPECT_EQ_MSG(test,150 testcase->ts.tv_nsec,151 ts.tv_nsec,152 "Timestamp mismatch (nanoseconds)\n");153}154 155static void fat_time_unix2fat_test(struct kunit *test)156{157 static struct msdos_sb_info fake_sb;158 __le16 date, time;159 u8 cs;160 struct fat_timestamp_testcase *testcase =161 (struct fat_timestamp_testcase *)test->param_value;162 163 fake_sb.options.tz_set = 1;164 fake_sb.options.time_offset = testcase->time_offset;165 166 fat_time_unix2fat(&fake_sb, &testcase->ts,167 &time, &date, &cs);168 KUNIT_EXPECT_EQ_MSG(test,169 le16_to_cpu(testcase->time),170 le16_to_cpu(time),171 "Time mismatch\n");172 KUNIT_EXPECT_EQ_MSG(test,173 le16_to_cpu(testcase->date),174 le16_to_cpu(date),175 "Date mismatch\n");176 KUNIT_EXPECT_EQ_MSG(test,177 testcase->cs,178 cs,179 "Centisecond mismatch\n");180}181 182static struct kunit_case fat_test_cases[] = {183 KUNIT_CASE(fat_checksum_test),184 KUNIT_CASE_PARAM(fat_time_fat2unix_test, fat_time_gen_params),185 KUNIT_CASE_PARAM(fat_time_unix2fat_test, fat_time_gen_params),186 {},187};188 189static struct kunit_suite fat_test_suite = {190 .name = "fat_test",191 .test_cases = fat_test_cases,192};193 194kunit_test_suites(&fat_test_suite);195 196MODULE_DESCRIPTION("KUnit tests for FAT filesystems");197MODULE_LICENSE("GPL v2");198