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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