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usr
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src
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linux-headers-5.15.0-190
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fs
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ubifs
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/usr/src/linux-headers-5.15.0-190/fs/ubifs
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/usr/src/linux-headers-5.15.0-190/fs/ubifs/Kconfig
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# SPDX-License-Identifier: GPL-2.0-only config UBIFS_FS tristate "UBIFS file system support" select CRC16 select CRC32 select CRYPTO if UBIFS_FS_ADVANCED_COMPR select CRYPTO if UBIFS_FS_LZO select CRYPTO if UBIFS_FS_ZLIB select CRYPTO if UBIFS_FS_ZSTD select CRYPTO_LZO if UBIFS_FS_LZO select CRYPTO_DEFLATE if UBIFS_FS_ZLIB select CRYPTO_ZSTD if UBIFS_FS_ZSTD select CRYPTO_HASH_INFO select UBIFS_FS_XATTR if FS_ENCRYPTION select FS_ENCRYPTION_ALGS if FS_ENCRYPTION depends on MTD_UBI help UBIFS is a file system for flash devices which works on top of UBI. if UBIFS_FS config UBIFS_FS_ADVANCED_COMPR bool "Advanced compression options" help This option allows to explicitly choose which compressions, if any, are enabled in UBIFS. Removing compressors means inability to read existing file systems. If unsure, say 'N'. config UBIFS_FS_LZO bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR default y help LZO compressor is generally faster than zlib but compresses worse. Say 'Y' if unsure. config UBIFS_FS_ZLIB bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR default y help Zlib compresses better than LZO but it is slower. Say 'Y' if unsure. config UBIFS_FS_ZSTD bool "ZSTD compression support" if UBIFS_FS_ADVANCED_COMPR depends on UBIFS_FS default y help ZSTD compresses is a big win in speed over Zlib and in compression ratio over LZO. Say 'Y' if unsure. config UBIFS_ATIME_SUPPORT bool "Access time support" default n help Originally UBIFS did not support atime, because it looked like a bad idea due increased flash wear. This option adds atime support and it is disabled by default to preserve the old behavior. If you enable this option, UBIFS starts updating atime, which means that file-system read operations will cause writes (inode atime updates). This may affect file-system performance and increase flash device wear, so be careful. How often atime is updated depends on the selected strategy: strictatime is the "heavy", relatime is "lighter", etc. If unsure, say 'N' config UBIFS_FS_XATTR bool "UBIFS XATTR support" default y help Saying Y here includes support for extended attributes (xattrs). Xattrs are name:value pairs associated with inodes by the kernel or by users (see the attr(5) manual page). If unsure, say Y. config UBIFS_FS_SECURITY bool "UBIFS Security Labels" depends on UBIFS_FS_XATTR default y help Security labels provide an access control facility to support Linux Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO Linux. This option enables an extended attribute handler for file security labels in the ubifs filesystem, so that it requires enabling the extended attribute support in advance. If you are not using a security module, say N. config UBIFS_FS_AUTHENTICATION bool "UBIFS authentication support" select KEYS select CRYPTO_HMAC select SYSTEM_DATA_VERIFICATION help Enable authentication support for UBIFS. This feature offers protection against offline changes for both data and metadata of the filesystem. If you say yes here you should also select a hashing algorithm such as sha256, these are not selected automatically since there are many different options. endif # UBIFS_FS
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