1# SPDX-License-Identifier: GPL-2.0-only 2config FAT_FS 3 tristate 4 select BUFFER_HEAD 5 select NLS 6 select LEGACY_DIRECT_IO 7 help 8 If you want to use one of the FAT-based file systems (the MS-DOS and 9 VFAT (Windows 95) file systems), then you must say Y or M here 10 to include FAT support. You will then be able to mount partitions or 11 diskettes with FAT-based file systems and transparently access the 12 files on them, i.e. MSDOS files will look and behave just like all 13 other Unix files. 14 15 This FAT support is not a file system in itself, it only provides 16 the foundation for the other file systems. You will have to say Y or 17 M to at least one of "MSDOS fs support" or "VFAT fs support" in 18 order to make use of it. 19 20 Another way to read and write MSDOS floppies and hard drive 21 partitions from within Linux (but not transparently) is with the 22 mtools ("man mtools") program suite. You don't need to say Y here in 23 order to do that. 24 25 If you need to move large files on floppies between a DOS and a 26 Linux box, say Y here, mount the floppy under Linux with an MSDOS 27 file system and use GNU tar's M option. GNU tar is a program 28 available for Unix and DOS ("man tar" or "info tar"). 29 30 The FAT support will enlarge your kernel by about 37 KB. If unsure, 31 say Y. 32 33 To compile this as a module, choose M here: the module will be called 34 fat. Note that if you compile the FAT support as a module, you 35 cannot compile any of the FAT-based file systems into the kernel 36 -- they will have to be modules as well. 37 38config MSDOS_FS 39 tristate "MSDOS fs support" 40 select FAT_FS 41 help 42 This allows you to mount MSDOS partitions of your hard drive (unless 43 they are compressed; to access compressed MSDOS partitions under 44 Linux, you can either use the DOS emulator DOSEMU, described in the 45 DOSEMU-HOWTO, available from 46 <https://www.tldp.org/docs.html#howto>, or try dmsdosfs in 47 <ftp://ibiblio.org/pub/Linux/system/filesystems/dosfs/>. If you 48 intend to use dosemu with a non-compressed MSDOS partition, say Y 49 here) and MSDOS floppies. This means that file access becomes 50 transparent, i.e. the MSDOS files look and behave just like all 51 other Unix files. 52 53 If you have Windows 95 or Windows NT installed on your MSDOS 54 partitions, you should use the VFAT file system (say Y to "VFAT fs 55 support" below), or you will not be able to see the long filenames 56 generated by Windows 95 / Windows NT. 57 58 This option will enlarge your kernel by about 7 KB. If unsure, 59 answer Y. This will only work if you said Y to "DOS FAT fs support" 60 as well. To compile this as a module, choose M here: the module will 61 be called msdos. 62 63config VFAT_FS 64 tristate "VFAT (Windows-95) fs support" 65 select FAT_FS 66 help 67 This option provides support for normal Windows file systems with 68 long filenames. That includes non-compressed FAT-based file systems 69 used by Windows 95, Windows 98, Windows NT 4.0, and the Unix 70 programs from the mtools package. 71 72 The VFAT support enlarges your kernel by about 10 KB and it only 73 works if you said Y to the "DOS FAT fs support" above. Please read 74 the file <file:Documentation/filesystems/vfat.rst> for details. If 75 unsure, say Y. 76 77 To compile this as a module, choose M here: the module will be called 78 vfat. 79 80config FAT_DEFAULT_CODEPAGE 81 int "Default codepage for FAT" 82 depends on FAT_FS 83 default 437 84 help 85 This option should be set to the codepage of your FAT filesystems. 86 It can be overridden with the "codepage" mount option. 87 See <file:Documentation/filesystems/vfat.rst> for more information. 88 89config FAT_DEFAULT_IOCHARSET 90 string "Default iocharset for FAT" 91 depends on VFAT_FS 92 default "iso8859-1" 93 help 94 Set this to the default input/output character set you'd 95 like FAT to use. It should probably match the character set 96 that most of your FAT filesystems use, and can be overridden 97 with the "iocharset" mount option for FAT filesystems. 98 Note that "utf8" is not recommended for FAT filesystems. 99 If unsure, you shouldn't set "utf8" here - select the next option 100 instead if you would like to use UTF-8 encoded file names by default. 101 See <file:Documentation/filesystems/vfat.rst> for more information. 102 103 Enable any character sets you need in File Systems/Native Language 104 Support. 105 106config FAT_DEFAULT_UTF8 107 bool "Enable FAT UTF-8 option by default" 108 depends on VFAT_FS 109 default n 110 help 111 Set this if you would like to have "utf8" mount option set 112 by default when mounting FAT filesystems. 113 114 Even if you say Y here can always disable UTF-8 for 115 particular mount by adding "utf8=0" to mount options. 116 117 Say Y if you use UTF-8 encoding for file names, N otherwise. 118 119 See <file:Documentation/filesystems/vfat.rst> for more information. 120 121config FAT_KUNIT_TEST 122 tristate "Unit Tests for FAT filesystems" if !KUNIT_ALL_TESTS 123 depends on KUNIT && FAT_FS 124 default KUNIT_ALL_TESTS 125 help 126 This builds the FAT KUnit tests 127 128 For more information on KUnit and unit tests in general, please refer 129 to the KUnit documentation in Documentation/dev-tools/kunit 130 131 If unsure, say N 132