1 ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 2 0d7eff87SArtem Bityutskiyconfig UBIFS_FS 3 0d7eff87SArtem Bityutskiy tristate "UBIFS file system support" 4 0d7eff87SArtem Bityutskiy select CRC16 5 0d7eff87SArtem Bityutskiy select CRC32 6 0d7eff87SArtem Bityutskiy select CRYPTO if UBIFS_FS_ADVANCED_COMPR 7 0d7eff87SArtem Bityutskiy select CRYPTO if UBIFS_FS_LZO 8 0d7eff87SArtem Bityutskiy select CRYPTO if UBIFS_FS_ZLIB 9 eeabb986SMichele Dionisio select CRYPTO if UBIFS_FS_ZSTD 10 0d7eff87SArtem Bityutskiy select CRYPTO_LZO if UBIFS_FS_LZO 11 0d7eff87SArtem Bityutskiy select CRYPTO_DEFLATE if UBIFS_FS_ZLIB 12 eeabb986SMichele Dionisio select CRYPTO_ZSTD if UBIFS_FS_ZSTD 13 49525e5eSSascha Hauer select CRYPTO_HASH_INFO 14 643fa961SChandan Rajendra select UBIFS_FS_XATTR if FS_ENCRYPTION 15 *ede7a09fSHerbert Xu select FS_ENCRYPTION_ALGS if FS_ENCRYPTION 16 0d7eff87SArtem Bityutskiy depends on MTD_UBI 17 0d7eff87SArtem Bityutskiy help 18 0d7eff87SArtem Bityutskiy UBIFS is a file system for flash devices which works on top of UBI. 19 0d7eff87SArtem Bityutskiy 20 aa3d31e0SGeert Uytterhoevenif UBIFS_FS 21 aa3d31e0SGeert Uytterhoeven 22 0d7eff87SArtem Bityutskiyconfig UBIFS_FS_ADVANCED_COMPR 23 0d7eff87SArtem Bityutskiy bool "Advanced compression options" 24 0d7eff87SArtem Bityutskiy help 25 0d7eff87SArtem Bityutskiy This option allows to explicitly choose which compressions, if any, 26 692105b8SMatt LaPlante are enabled in UBIFS. Removing compressors means inability to read 27 0d7eff87SArtem Bityutskiy existing file systems. 28 0d7eff87SArtem Bityutskiy 29 0d7eff87SArtem Bityutskiy If unsure, say 'N'. 30 0d7eff87SArtem Bityutskiy 31 0d7eff87SArtem Bityutskiyconfig UBIFS_FS_LZO 32 0d7eff87SArtem Bityutskiy bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR 33 0d7eff87SArtem Bityutskiy default y 34 0d7eff87SArtem Bityutskiy help 35 692105b8SMatt LaPlante LZO compressor is generally faster than zlib but compresses worse. 36 0d7eff87SArtem Bityutskiy Say 'Y' if unsure. 37 0d7eff87SArtem Bityutskiy 38 0d7eff87SArtem Bityutskiyconfig UBIFS_FS_ZLIB 39 0d7eff87SArtem Bityutskiy bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR 40 0d7eff87SArtem Bityutskiy default y 41 0d7eff87SArtem Bityutskiy help 42 025dfdafSFrederik Schwarzer Zlib compresses better than LZO but it is slower. Say 'Y' if unsure. 43 8c1c5f26SDongsheng Yang 44 eeabb986SMichele Dionisioconfig UBIFS_FS_ZSTD 45 eeabb986SMichele Dionisio bool "ZSTD compression support" if UBIFS_FS_ADVANCED_COMPR 46 eeabb986SMichele Dionisio depends on UBIFS_FS 47 eeabb986SMichele Dionisio default y 48 eeabb986SMichele Dionisio help 49 eeabb986SMichele Dionisio ZSTD compresses is a big win in speed over Zlib and 50 eeabb986SMichele Dionisio in compression ratio over LZO. Say 'Y' if unsure. 51 eeabb986SMichele Dionisio 52 8c1c5f26SDongsheng Yangconfig UBIFS_ATIME_SUPPORT 53 aa3d31e0SGeert Uytterhoeven bool "Access time support" 54 8c1c5f26SDongsheng Yang default n 55 8c1c5f26SDongsheng Yang help 56 8c1c5f26SDongsheng Yang Originally UBIFS did not support atime, because it looked like a bad idea due 57 8c1c5f26SDongsheng Yang increased flash wear. This option adds atime support and it is disabled by default 58 8c1c5f26SDongsheng Yang to preserve the old behavior. If you enable this option, UBIFS starts updating atime, 59 8c1c5f26SDongsheng Yang which means that file-system read operations will cause writes (inode atime 60 8c1c5f26SDongsheng Yang updates). This may affect file-system performance and increase flash device wear, 61 8c1c5f26SDongsheng Yang so be careful. How often atime is updated depends on the selected strategy: 62 8c1c5f26SDongsheng Yang strictatime is the "heavy", relatime is "lighter", etc. 63 8c1c5f26SDongsheng Yang 64 8c1c5f26SDongsheng Yang If unsure, say 'N' 65 d475a507SRichard Weinberger 66 7e5471ceSStefan Agnerconfig UBIFS_FS_XATTR 67 7e5471ceSStefan Agner bool "UBIFS XATTR support" 68 7e5471ceSStefan Agner default y 69 7e5471ceSStefan Agner help 70 7e5471ceSStefan Agner Saying Y here includes support for extended attributes (xattrs). 71 7e5471ceSStefan Agner Xattrs are name:value pairs associated with inodes by 72 7e5471ceSStefan Agner the kernel or by users (see the attr(5) manual page). 73 7e5471ceSStefan Agner 74 7e5471ceSStefan Agner If unsure, say Y. 75 7e5471ceSStefan Agner 76 8326c1eeSHyunchul Leeconfig UBIFS_FS_SECURITY 77 8326c1eeSHyunchul Lee bool "UBIFS Security Labels" 78 aa3d31e0SGeert Uytterhoeven depends on UBIFS_FS_XATTR 79 8326c1eeSHyunchul Lee default y 80 8326c1eeSHyunchul Lee help 81 8326c1eeSHyunchul Lee Security labels provide an access control facility to support Linux 82 8326c1eeSHyunchul Lee Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO 83 8326c1eeSHyunchul Lee Linux. This option enables an extended attribute handler for file 84 8326c1eeSHyunchul Lee security labels in the ubifs filesystem, so that it requires enabling 85 8326c1eeSHyunchul Lee the extended attribute support in advance. 86 8326c1eeSHyunchul Lee 87 8326c1eeSHyunchul Lee If you are not using a security module, say N. 88 d8a22773SSascha Hauer 89 d8a22773SSascha Hauerconfig UBIFS_FS_AUTHENTICATION 90 d8a22773SSascha Hauer bool "UBIFS authentication support" 91 817aa094SSascha Hauer select KEYS 92 d8a22773SSascha Hauer select CRYPTO_HMAC 93 817aa094SSascha Hauer select SYSTEM_DATA_VERIFICATION 94 d8a22773SSascha Hauer help 95 d8a22773SSascha Hauer Enable authentication support for UBIFS. This feature offers protection 96 d8a22773SSascha Hauer against offline changes for both data and metadata of the filesystem. 97 d8a22773SSascha Hauer If you say yes here you should also select a hashing algorithm such as 98 d8a22773SSascha Hauer sha256, these are not selected automatically since there are many 99 d8a22773SSascha Hauer different options. 100 aa3d31e0SGeert Uytterhoeven 101 aa3d31e0SGeert Uytterhoevenendif # UBIFS_FS 102