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