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.
55 bool "UBIFS XATTR support"
59 Saying Y here includes support for extended attributes (xattrs).
60 Xattrs are name:value pairs associated with inodes by
61 the kernel or by users (see the attr(5) manual page).
65 config UBIFS_FS_ENCRYPTION
66 bool "UBIFS Encryption"
67 depends on UBIFS_FS && UBIFS_FS_XATTR && BLOCK
71 Enable encryption of UBIFS files and directories. This
72 feature is similar to ecryptfs, but it is more memory
73 efficient since it avoids caching the encrypted and
74 decrypted pages in the page cache.
76 config UBIFS_FS_SECURITY
77 bool "UBIFS Security Labels"
78 depends on UBIFS_FS && UBIFS_FS_XATTR
81 Security labels provide an access control facility to support Linux
82 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
83 Linux. This option enables an extended attribute handler for file
84 security labels in the ubifs filesystem, so that it requires enabling
85 the extended attribute support in advance.
87 If you are not using a security module, say N.