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fat: Add KUnit tests for checksums and timestamps
Add some basic sanity-check tests for the fat_checksum() function and the fat_time_unix2fat() and fat_time_fat2unix() functions. These unit tests verify these functions return correct output for a number of test inputs. These tests were inspired by -- and serve a similar purpose to -- the timestamp parsing KUnit tests in ext4[1]. Note that, unlike fat_time_unix2fat, fat_time_fat2unix wasn't previously exported, so this patch exports it as well. This is required for the case where we're building the fat and fat_test as modules. Fixed minor checkpatch coding style errors and typos in commit log: Shuah Khan <skhan@linuxfoundation.org> [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/ext4/inode-test.c Signed-off-by: David Gow <davidgow@google.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Tested-by: Daniel Latypov <dlatypov@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
David Gow
Shuah Khan
parent
2734d6c1b1
commit
b0d4adaf3b
5
fs/fat/.kunitconfig
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5
fs/fat/.kunitconfig
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@ -0,0 +1,5 @@
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CONFIG_KUNIT=y
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CONFIG_FAT_FS=y
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CONFIG_MSDOS_FS=y
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CONFIG_VFAT_FS=y
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CONFIG_FAT_KUNIT_TEST=y
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@ -77,7 +77,7 @@ config VFAT_FS
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config FAT_DEFAULT_CODEPAGE
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int "Default codepage for FAT"
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depends on MSDOS_FS || VFAT_FS
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depends on FAT_FS
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default 437
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help
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This option should be set to the codepage of your FAT filesystems.
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@ -115,3 +115,15 @@ config FAT_DEFAULT_UTF8
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Say Y if you use UTF-8 encoding for file names, N otherwise.
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See <file:Documentation/filesystems/vfat.rst> for more information.
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config FAT_KUNIT_TEST
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tristate "Unit Tests for FAT filesystems" if !KUNIT_ALL_TESTS
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depends on KUNIT && FAT_FS
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default KUNIT_ALL_TESTS
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help
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This builds the FAT KUnit tests
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For more information on KUnit and unit tests in general, please refer
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to the KUnit documentation in Documentation/dev-tools/kunit
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If unsure, say N
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@ -10,3 +10,5 @@ obj-$(CONFIG_MSDOS_FS) += msdos.o
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fat-y := cache.o dir.o fatent.o file.o inode.o misc.o nfs.o
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vfat-y := namei_vfat.o
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msdos-y := namei_msdos.o
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obj-$(CONFIG_FAT_KUNIT_TEST) += fat_test.o
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196
fs/fat/fat_test.c
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196
fs/fat/fat_test.c
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@ -0,0 +1,196 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* KUnit tests for FAT filesystems.
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*
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* Copyright (C) 2020 Google LLC.
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* Author: David Gow <davidgow@google.com>
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*/
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#include <kunit/test.h>
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#include "fat.h"
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static void fat_checksum_test(struct kunit *test)
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{
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/* With no extension. */
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KUNIT_EXPECT_EQ(test, fat_checksum("VMLINUX "), (u8)44);
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/* With 3-letter extension. */
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KUNIT_EXPECT_EQ(test, fat_checksum("README TXT"), (u8)115);
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/* With short (1-letter) extension. */
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KUNIT_EXPECT_EQ(test, fat_checksum("ABCDEFGHA "), (u8)98);
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}
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struct fat_timestamp_testcase {
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const char *name;
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struct timespec64 ts;
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__le16 time;
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__le16 date;
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u8 cs;
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int time_offset;
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};
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static struct fat_timestamp_testcase time_test_cases[] = {
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{
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.name = "Earliest possible UTC (1980-01-01 00:00:00)",
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.ts = {.tv_sec = 315532800LL, .tv_nsec = 0L},
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.time = cpu_to_le16(0),
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.date = cpu_to_le16(33),
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.cs = 0,
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.time_offset = 0,
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},
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{
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.name = "Latest possible UTC (2107-12-31 23:59:58)",
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.ts = {.tv_sec = 4354819198LL, .tv_nsec = 0L},
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.time = cpu_to_le16(49021),
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.date = cpu_to_le16(65439),
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.cs = 0,
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.time_offset = 0,
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},
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{
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.name = "Earliest possible (UTC-11) (== 1979-12-31 13:00:00 UTC)",
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.ts = {.tv_sec = 315493200LL, .tv_nsec = 0L},
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.time = cpu_to_le16(0),
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.date = cpu_to_le16(33),
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.cs = 0,
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.time_offset = 11 * 60,
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},
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{
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.name = "Latest possible (UTC+11) (== 2108-01-01 10:59:58 UTC)",
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.ts = {.tv_sec = 4354858798LL, .tv_nsec = 0L},
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.time = cpu_to_le16(49021),
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.date = cpu_to_le16(65439),
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.cs = 0,
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.time_offset = -11 * 60,
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},
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{
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.name = "Leap Day / Year (1996-02-29 00:00:00)",
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.ts = {.tv_sec = 825552000LL, .tv_nsec = 0L},
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.time = cpu_to_le16(0),
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.date = cpu_to_le16(8285),
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.cs = 0,
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.time_offset = 0,
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},
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{
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.name = "Year 2000 is leap year (2000-02-29 00:00:00)",
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.ts = {.tv_sec = 951782400LL, .tv_nsec = 0L},
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.time = cpu_to_le16(0),
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.date = cpu_to_le16(10333),
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.cs = 0,
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.time_offset = 0,
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},
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{
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.name = "Year 2100 not leap year (2100-03-01 00:00:00)",
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.ts = {.tv_sec = 4107542400LL, .tv_nsec = 0L},
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.time = cpu_to_le16(0),
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.date = cpu_to_le16(61537),
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.cs = 0,
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.time_offset = 0,
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},
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{
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.name = "Leap year + timezone UTC+1 (== 2004-02-29 00:30:00 UTC)",
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.ts = {.tv_sec = 1078014600LL, .tv_nsec = 0L},
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.time = cpu_to_le16(48064),
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.date = cpu_to_le16(12380),
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.cs = 0,
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.time_offset = -60,
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},
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{
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.name = "Leap year + timezone UTC-1 (== 2004-02-29 23:30:00 UTC)",
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.ts = {.tv_sec = 1078097400LL, .tv_nsec = 0L},
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.time = cpu_to_le16(960),
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.date = cpu_to_le16(12385),
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.cs = 0,
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.time_offset = 60,
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},
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{
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.name = "VFAT odd-second resolution (1999-12-31 23:59:59)",
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.ts = {.tv_sec = 946684799LL, .tv_nsec = 0L},
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.time = cpu_to_le16(49021),
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.date = cpu_to_le16(10143),
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.cs = 100,
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.time_offset = 0,
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},
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{
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.name = "VFAT 10ms resolution (1980-01-01 00:00:00:0010)",
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.ts = {.tv_sec = 315532800LL, .tv_nsec = 10000000L},
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.time = cpu_to_le16(0),
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.date = cpu_to_le16(33),
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.cs = 1,
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.time_offset = 0,
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},
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};
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static void time_testcase_desc(struct fat_timestamp_testcase *t,
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char *desc)
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{
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strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
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}
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KUNIT_ARRAY_PARAM(fat_time, time_test_cases, time_testcase_desc);
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static void fat_time_fat2unix_test(struct kunit *test)
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{
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static struct msdos_sb_info fake_sb;
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struct timespec64 ts;
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struct fat_timestamp_testcase *testcase =
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(struct fat_timestamp_testcase *)test->param_value;
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fake_sb.options.tz_set = 1;
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fake_sb.options.time_offset = testcase->time_offset;
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fat_time_fat2unix(&fake_sb, &ts,
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testcase->time,
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testcase->date,
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testcase->cs);
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KUNIT_EXPECT_EQ_MSG(test,
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testcase->ts.tv_sec,
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ts.tv_sec,
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"Timestamp mismatch (seconds)\n");
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KUNIT_EXPECT_EQ_MSG(test,
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testcase->ts.tv_nsec,
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ts.tv_nsec,
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"Timestamp mismatch (nanoseconds)\n");
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}
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static void fat_time_unix2fat_test(struct kunit *test)
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{
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static struct msdos_sb_info fake_sb;
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__le16 date, time;
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u8 cs;
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struct fat_timestamp_testcase *testcase =
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(struct fat_timestamp_testcase *)test->param_value;
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fake_sb.options.tz_set = 1;
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fake_sb.options.time_offset = testcase->time_offset;
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fat_time_unix2fat(&fake_sb, &testcase->ts,
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&time, &date, &cs);
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KUNIT_EXPECT_EQ_MSG(test,
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le16_to_cpu(testcase->time),
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le16_to_cpu(time),
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"Time mismatch\n");
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KUNIT_EXPECT_EQ_MSG(test,
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le16_to_cpu(testcase->date),
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le16_to_cpu(date),
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"Date mismatch\n");
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KUNIT_EXPECT_EQ_MSG(test,
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testcase->cs,
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cs,
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"Centisecond mismatch\n");
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}
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static struct kunit_case fat_test_cases[] = {
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KUNIT_CASE(fat_checksum_test),
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KUNIT_CASE_PARAM(fat_time_fat2unix_test, fat_time_gen_params),
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KUNIT_CASE_PARAM(fat_time_unix2fat_test, fat_time_gen_params),
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{},
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};
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static struct kunit_suite fat_test_suite = {
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.name = "fat_test",
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.test_cases = fat_test_cases,
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};
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kunit_test_suites(&fat_test_suite);
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MODULE_LICENSE("GPL v2");
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@ -230,6 +230,9 @@ void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec64 *ts,
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}
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}
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/* Export fat_time_fat2unix() for the fat_test KUnit tests. */
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EXPORT_SYMBOL_GPL(fat_time_fat2unix);
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/* Convert linear UNIX date to a FAT time/date pair. */
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void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec64 *ts,
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__le16 *time, __le16 *date, u8 *time_cs)
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