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
10 select CRYPTO_HASH_INFO
11 select UBIFS_FS_XATTR if FS_ENCRYPTION
14 UBIFS is a file system for flash devices which works on top of UBI.
18 config UBIFS_FS_ADVANCED_COMPR
19 bool "Advanced compression options"
21 This option allows to explicitly choose which compressions, if any,
22 are enabled in UBIFS. Removing compressors means inability to read
23 existing file systems.
28 bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR
31 LZO compressor is generally faster than zlib but compresses worse.
35 bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR
38 Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
40 config UBIFS_ATIME_SUPPORT
41 bool "Access time support"
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"
58 Saying Y here includes support for extended attributes (xattrs).
59 Xattrs are name:value pairs associated with inodes by
60 the kernel or by users (see the attr(5) manual page).
64 config UBIFS_FS_SECURITY
65 bool "UBIFS Security Labels"
66 depends on UBIFS_FS_XATTR
69 Security labels provide an access control facility to support Linux
70 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
71 Linux. This option enables an extended attribute handler for file
72 security labels in the ubifs filesystem, so that it requires enabling
73 the extended attribute support in advance.
75 If you are not using a security module, say N.
77 config UBIFS_FS_AUTHENTICATION
78 bool "UBIFS authentication support"
82 Enable authentication support for UBIFS. This feature offers protection
83 against offline changes for both data and metadata of the filesystem.
84 If you say yes here you should also select a hashing algorithm such as
85 sha256, these are not selected automatically since there are many