2 tristate "UBIFS file system support"
5 select CRYPTO if UBIFS_FS_ADVANCED_COMPR
6 select CRYPTO if UBIFS_FS_LZO
7 select CRYPTO if UBIFS_FS_ZLIB
8 select CRYPTO_LZO if UBIFS_FS_LZO
9 select CRYPTO_DEFLATE if UBIFS_FS_ZLIB
12 UBIFS is a file system for flash devices which works on top of UBI.
14 config UBIFS_FS_ADVANCED_COMPR
15 bool "Advanced compression options"
18 This option allows to explicitly choose which compressions, if any,
19 are enabled in UBIFS. Removing compressors means inability to read
20 existing file systems.
25 bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR
29 LZO compressor is generally faster than zlib but compresses worse.
33 bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR
37 Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
39 config UBIFS_ATIME_SUPPORT
40 bool "Access time support" if UBIFS_FS
44 Originally UBIFS did not support atime, because it looked like a bad idea due
45 increased flash wear. This option adds atime support and it is disabled by default
46 to preserve the old behavior. If you enable this option, UBIFS starts updating atime,
47 which means that file-system read operations will cause writes (inode atime
48 updates). This may affect file-system performance and increase flash device wear,
49 so be careful. How often atime is updated depends on the selected strategy:
50 strictatime is the "heavy", relatime is "lighter", etc.
54 config UBIFS_FS_ENCRYPTION
55 bool "UBIFS Encryption"
56 depends on UBIFS_FS && BLOCK
60 Enable encryption of UBIFS files and directories. This
61 feature is similar to ecryptfs, but it is more memory
62 efficient since it avoids caching the encrypted and
63 decrypted pages in the page cache.
65 config UBIFS_FS_SECURITY
66 bool "UBIFS Security Labels"
70 Security labels provide an access control facility to support Linux
71 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
72 Linux. This option enables an extended attribute handler for file
73 security labels in the ubifs filesystem, so that it requires enabling
74 the extended attribute support in advance.
76 If you are not using a security module, say N.