1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 20d7eff87SArtem Bityutskiyconfig UBIFS_FS 30d7eff87SArtem Bityutskiy tristate "UBIFS file system support" 40d7eff87SArtem Bityutskiy select CRC16 50d7eff87SArtem Bityutskiy select CRC32 60d7eff87SArtem Bityutskiy select CRYPTO if UBIFS_FS_ADVANCED_COMPR 70d7eff87SArtem Bityutskiy select CRYPTO if UBIFS_FS_LZO 80d7eff87SArtem Bityutskiy select CRYPTO if UBIFS_FS_ZLIB 9eeabb986SMichele Dionisio select CRYPTO if UBIFS_FS_ZSTD 100d7eff87SArtem Bityutskiy select CRYPTO_LZO if UBIFS_FS_LZO 110d7eff87SArtem Bityutskiy select CRYPTO_DEFLATE if UBIFS_FS_ZLIB 12eeabb986SMichele Dionisio select CRYPTO_ZSTD if UBIFS_FS_ZSTD 1349525e5eSSascha Hauer select CRYPTO_HASH_INFO 14643fa961SChandan Rajendra select UBIFS_FS_XATTR if FS_ENCRYPTION 15*ede7a09fSHerbert Xu select FS_ENCRYPTION_ALGS if FS_ENCRYPTION 160d7eff87SArtem Bityutskiy depends on MTD_UBI 170d7eff87SArtem Bityutskiy help 180d7eff87SArtem Bityutskiy UBIFS is a file system for flash devices which works on top of UBI. 190d7eff87SArtem Bityutskiy 20aa3d31e0SGeert Uytterhoevenif UBIFS_FS 21aa3d31e0SGeert Uytterhoeven 220d7eff87SArtem Bityutskiyconfig UBIFS_FS_ADVANCED_COMPR 230d7eff87SArtem Bityutskiy bool "Advanced compression options" 240d7eff87SArtem Bityutskiy help 250d7eff87SArtem Bityutskiy This option allows to explicitly choose which compressions, if any, 26692105b8SMatt LaPlante are enabled in UBIFS. Removing compressors means inability to read 270d7eff87SArtem Bityutskiy existing file systems. 280d7eff87SArtem Bityutskiy 290d7eff87SArtem Bityutskiy If unsure, say 'N'. 300d7eff87SArtem Bityutskiy 310d7eff87SArtem Bityutskiyconfig UBIFS_FS_LZO 320d7eff87SArtem Bityutskiy bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR 330d7eff87SArtem Bityutskiy default y 340d7eff87SArtem Bityutskiy help 35692105b8SMatt LaPlante LZO compressor is generally faster than zlib but compresses worse. 360d7eff87SArtem Bityutskiy Say 'Y' if unsure. 370d7eff87SArtem Bityutskiy 380d7eff87SArtem Bityutskiyconfig UBIFS_FS_ZLIB 390d7eff87SArtem Bityutskiy bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR 400d7eff87SArtem Bityutskiy default y 410d7eff87SArtem Bityutskiy help 42025dfdafSFrederik Schwarzer Zlib compresses better than LZO but it is slower. Say 'Y' if unsure. 438c1c5f26SDongsheng Yang 44eeabb986SMichele Dionisioconfig UBIFS_FS_ZSTD 45eeabb986SMichele Dionisio bool "ZSTD compression support" if UBIFS_FS_ADVANCED_COMPR 46eeabb986SMichele Dionisio depends on UBIFS_FS 47eeabb986SMichele Dionisio default y 48eeabb986SMichele Dionisio help 49eeabb986SMichele Dionisio ZSTD compresses is a big win in speed over Zlib and 50eeabb986SMichele Dionisio in compression ratio over LZO. Say 'Y' if unsure. 51eeabb986SMichele Dionisio 528c1c5f26SDongsheng Yangconfig UBIFS_ATIME_SUPPORT 53aa3d31e0SGeert Uytterhoeven bool "Access time support" 548c1c5f26SDongsheng Yang default n 558c1c5f26SDongsheng Yang help 568c1c5f26SDongsheng Yang Originally UBIFS did not support atime, because it looked like a bad idea due 578c1c5f26SDongsheng Yang increased flash wear. This option adds atime support and it is disabled by default 588c1c5f26SDongsheng Yang to preserve the old behavior. If you enable this option, UBIFS starts updating atime, 598c1c5f26SDongsheng Yang which means that file-system read operations will cause writes (inode atime 608c1c5f26SDongsheng Yang updates). This may affect file-system performance and increase flash device wear, 618c1c5f26SDongsheng Yang so be careful. How often atime is updated depends on the selected strategy: 628c1c5f26SDongsheng Yang strictatime is the "heavy", relatime is "lighter", etc. 638c1c5f26SDongsheng Yang 648c1c5f26SDongsheng Yang If unsure, say 'N' 65d475a507SRichard Weinberger 667e5471ceSStefan Agnerconfig UBIFS_FS_XATTR 677e5471ceSStefan Agner bool "UBIFS XATTR support" 687e5471ceSStefan Agner default y 697e5471ceSStefan Agner help 707e5471ceSStefan Agner Saying Y here includes support for extended attributes (xattrs). 717e5471ceSStefan Agner Xattrs are name:value pairs associated with inodes by 727e5471ceSStefan Agner the kernel or by users (see the attr(5) manual page). 737e5471ceSStefan Agner 747e5471ceSStefan Agner If unsure, say Y. 757e5471ceSStefan Agner 768326c1eeSHyunchul Leeconfig UBIFS_FS_SECURITY 778326c1eeSHyunchul Lee bool "UBIFS Security Labels" 78aa3d31e0SGeert Uytterhoeven depends on UBIFS_FS_XATTR 798326c1eeSHyunchul Lee default y 808326c1eeSHyunchul Lee help 818326c1eeSHyunchul Lee Security labels provide an access control facility to support Linux 828326c1eeSHyunchul Lee Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO 838326c1eeSHyunchul Lee Linux. This option enables an extended attribute handler for file 848326c1eeSHyunchul Lee security labels in the ubifs filesystem, so that it requires enabling 858326c1eeSHyunchul Lee the extended attribute support in advance. 868326c1eeSHyunchul Lee 878326c1eeSHyunchul Lee If you are not using a security module, say N. 88d8a22773SSascha Hauer 89d8a22773SSascha Hauerconfig UBIFS_FS_AUTHENTICATION 90d8a22773SSascha Hauer bool "UBIFS authentication support" 91817aa094SSascha Hauer select KEYS 92d8a22773SSascha Hauer select CRYPTO_HMAC 93817aa094SSascha Hauer select SYSTEM_DATA_VERIFICATION 94d8a22773SSascha Hauer help 95d8a22773SSascha Hauer Enable authentication support for UBIFS. This feature offers protection 96d8a22773SSascha Hauer against offline changes for both data and metadata of the filesystem. 97d8a22773SSascha Hauer If you say yes here you should also select a hashing algorithm such as 98d8a22773SSascha Hauer sha256, these are not selected automatically since there are many 99d8a22773SSascha Hauer different options. 100aa3d31e0SGeert Uytterhoeven 101aa3d31e0SGeert Uytterhoevenendif # UBIFS_FS 102