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b0d4adaf3b
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>
129 lines
5 KiB
Text
129 lines
5 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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config FAT_FS
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tristate
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select NLS
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help
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If you want to use one of the FAT-based file systems (the MS-DOS and
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VFAT (Windows 95) file systems), then you must say Y or M here
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to include FAT support. You will then be able to mount partitions or
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diskettes with FAT-based file systems and transparently access the
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files on them, i.e. MSDOS files will look and behave just like all
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other Unix files.
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This FAT support is not a file system in itself, it only provides
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the foundation for the other file systems. You will have to say Y or
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M to at least one of "MSDOS fs support" or "VFAT fs support" in
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order to make use of it.
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Another way to read and write MSDOS floppies and hard drive
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partitions from within Linux (but not transparently) is with the
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mtools ("man mtools") program suite. You don't need to say Y here in
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order to do that.
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If you need to move large files on floppies between a DOS and a
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Linux box, say Y here, mount the floppy under Linux with an MSDOS
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file system and use GNU tar's M option. GNU tar is a program
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available for Unix and DOS ("man tar" or "info tar").
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The FAT support will enlarge your kernel by about 37 KB. If unsure,
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say Y.
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To compile this as a module, choose M here: the module will be called
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fat. Note that if you compile the FAT support as a module, you
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cannot compile any of the FAT-based file systems into the kernel
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-- they will have to be modules as well.
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config MSDOS_FS
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tristate "MSDOS fs support"
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select FAT_FS
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help
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This allows you to mount MSDOS partitions of your hard drive (unless
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they are compressed; to access compressed MSDOS partitions under
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Linux, you can either use the DOS emulator DOSEMU, described in the
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DOSEMU-HOWTO, available from
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<https://www.tldp.org/docs.html#howto>, or try dmsdosfs in
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<ftp://ibiblio.org/pub/Linux/system/filesystems/dosfs/>. If you
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intend to use dosemu with a non-compressed MSDOS partition, say Y
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here) and MSDOS floppies. This means that file access becomes
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transparent, i.e. the MSDOS files look and behave just like all
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other Unix files.
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If you have Windows 95 or Windows NT installed on your MSDOS
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partitions, you should use the VFAT file system (say Y to "VFAT fs
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support" below), or you will not be able to see the long filenames
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generated by Windows 95 / Windows NT.
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This option will enlarge your kernel by about 7 KB. If unsure,
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answer Y. This will only work if you said Y to "DOS FAT fs support"
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as well. To compile this as a module, choose M here: the module will
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be called msdos.
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config VFAT_FS
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tristate "VFAT (Windows-95) fs support"
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select FAT_FS
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help
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This option provides support for normal Windows file systems with
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long filenames. That includes non-compressed FAT-based file systems
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used by Windows 95, Windows 98, Windows NT 4.0, and the Unix
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programs from the mtools package.
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The VFAT support enlarges your kernel by about 10 KB and it only
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works if you said Y to the "DOS FAT fs support" above. Please read
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the file <file:Documentation/filesystems/vfat.rst> for details. If
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unsure, say Y.
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To compile this as a module, choose M here: the module will be called
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vfat.
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config FAT_DEFAULT_CODEPAGE
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int "Default codepage for FAT"
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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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It can be overridden with the "codepage" mount option.
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See <file:Documentation/filesystems/vfat.rst> for more information.
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config FAT_DEFAULT_IOCHARSET
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string "Default iocharset for FAT"
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depends on VFAT_FS
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default "iso8859-1"
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help
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Set this to the default input/output character set you'd
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like FAT to use. It should probably match the character set
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that most of your FAT filesystems use, and can be overridden
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with the "iocharset" mount option for FAT filesystems.
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Note that "utf8" is not recommended for FAT filesystems.
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If unsure, you shouldn't set "utf8" here - select the next option
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instead if you would like to use UTF-8 encoded file names by default.
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See <file:Documentation/filesystems/vfat.rst> for more information.
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Enable any character sets you need in File Systems/Native Language
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Support.
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config FAT_DEFAULT_UTF8
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bool "Enable FAT UTF-8 option by default"
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depends on VFAT_FS
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default n
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help
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Set this if you would like to have "utf8" mount option set
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by default when mounting FAT filesystems.
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Even if you say Y here can always disable UTF-8 for
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particular mount by adding "utf8=0" to mount options.
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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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