| Artem Bityutskiy | 0d7eff8 | 2008-07-14 19:08:38 +0300 | [diff] [blame] | 1 | config UBIFS_FS |
| 2 | tristate "UBIFS file system support" |
| 3 | select CRC16 |
| 4 | select CRC32 |
| 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 |
| Sascha Hauer | 49525e5 | 2018-09-07 14:36:32 +0200 | [diff] [blame] | 10 | select CRYPTO_HASH_INFO |
| Artem Bityutskiy | 0d7eff8 | 2008-07-14 19:08:38 +0300 | [diff] [blame] | 11 | depends on MTD_UBI |
| 12 | help |
| 13 | UBIFS is a file system for flash devices which works on top of UBI. |
| 14 | |
| Artem Bityutskiy | 0d7eff8 | 2008-07-14 19:08:38 +0300 | [diff] [blame] | 15 | config UBIFS_FS_ADVANCED_COMPR |
| 16 | bool "Advanced compression options" |
| 17 | depends on UBIFS_FS |
| 18 | help |
| 19 | This option allows to explicitly choose which compressions, if any, |
| Matt LaPlante | 692105b | 2009-01-26 11:12:25 +0100 | [diff] [blame] | 20 | are enabled in UBIFS. Removing compressors means inability to read |
| Artem Bityutskiy | 0d7eff8 | 2008-07-14 19:08:38 +0300 | [diff] [blame] | 21 | existing file systems. |
| 22 | |
| 23 | If unsure, say 'N'. |
| 24 | |
| 25 | config UBIFS_FS_LZO |
| 26 | bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR |
| 27 | depends on UBIFS_FS |
| 28 | default y |
| 29 | help |
| Matt LaPlante | 692105b | 2009-01-26 11:12:25 +0100 | [diff] [blame] | 30 | LZO compressor is generally faster than zlib but compresses worse. |
| Artem Bityutskiy | 0d7eff8 | 2008-07-14 19:08:38 +0300 | [diff] [blame] | 31 | Say 'Y' if unsure. |
| 32 | |
| 33 | config UBIFS_FS_ZLIB |
| 34 | bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR |
| 35 | depends on UBIFS_FS |
| 36 | default y |
| 37 | help |
| Frederik Schwarzer | 025dfda | 2008-10-16 19:02:37 +0200 | [diff] [blame] | 38 | Zlib compresses better than LZO but it is slower. Say 'Y' if unsure. |
| Dongsheng Yang | 8c1c5f2 | 2015-11-07 12:46:11 +0800 | [diff] [blame] | 39 | |
| 40 | config UBIFS_ATIME_SUPPORT |
| 41 | bool "Access time support" if UBIFS_FS |
| 42 | depends on UBIFS_FS |
| 43 | default n |
| 44 | help |
| 45 | Originally UBIFS did not support atime, because it looked like a bad idea due |
| 46 | increased flash wear. This option adds atime support and it is disabled by default |
| 47 | to preserve the old behavior. If you enable this option, UBIFS starts updating atime, |
| 48 | which means that file-system read operations will cause writes (inode atime |
| 49 | updates). This may affect file-system performance and increase flash device wear, |
| 50 | so be careful. How often atime is updated depends on the selected strategy: |
| 51 | strictatime is the "heavy", relatime is "lighter", etc. |
| 52 | |
| 53 | If unsure, say 'N' |
| Richard Weinberger | d475a50 | 2016-10-20 16:47:56 +0200 | [diff] [blame] | 54 | |
| Stefan Agner | 7e5471c | 2018-07-31 15:13:20 +0200 | [diff] [blame] | 55 | config UBIFS_FS_XATTR |
| 56 | bool "UBIFS XATTR support" |
| 57 | depends on UBIFS_FS |
| 58 | default y |
| 59 | help |
| 60 | Saying Y here includes support for extended attributes (xattrs). |
| 61 | Xattrs are name:value pairs associated with inodes by |
| 62 | the kernel or by users (see the attr(5) manual page). |
| 63 | |
| 64 | If unsure, say Y. |
| 65 | |
| Richard Weinberger | d475a50 | 2016-10-20 16:47:56 +0200 | [diff] [blame] | 66 | config UBIFS_FS_ENCRYPTION |
| 67 | bool "UBIFS Encryption" |
| Stefan Agner | 7e5471c | 2018-07-31 15:13:20 +0200 | [diff] [blame] | 68 | depends on UBIFS_FS && UBIFS_FS_XATTR && BLOCK |
| Richard Weinberger | d475a50 | 2016-10-20 16:47:56 +0200 | [diff] [blame] | 69 | select FS_ENCRYPTION |
| 70 | default n |
| 71 | help |
| 72 | Enable encryption of UBIFS files and directories. This |
| 73 | feature is similar to ecryptfs, but it is more memory |
| 74 | efficient since it avoids caching the encrypted and |
| 75 | decrypted pages in the page cache. |
| Hyunchul Lee | 8326c1e | 2017-03-03 16:44:03 +0900 | [diff] [blame] | 76 | |
| 77 | config UBIFS_FS_SECURITY |
| 78 | bool "UBIFS Security Labels" |
| Stefan Agner | 7e5471c | 2018-07-31 15:13:20 +0200 | [diff] [blame] | 79 | depends on UBIFS_FS && UBIFS_FS_XATTR |
| Hyunchul Lee | 8326c1e | 2017-03-03 16:44:03 +0900 | [diff] [blame] | 80 | default y |
| 81 | help |
| 82 | Security labels provide an access control facility to support Linux |
| 83 | Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO |
| 84 | Linux. This option enables an extended attribute handler for file |
| 85 | security labels in the ubifs filesystem, so that it requires enabling |
| 86 | the extended attribute support in advance. |
| 87 | |
| 88 | If you are not using a security module, say N. |
| Sascha Hauer | d8a2277 | 2018-09-07 14:36:45 +0200 | [diff] [blame] | 89 | |
| 90 | config UBIFS_FS_AUTHENTICATION |
| 91 | bool "UBIFS authentication support" |
| 92 | select CRYPTO_HMAC |
| 93 | help |
| 94 | Enable authentication support for UBIFS. This feature offers protection |
| 95 | against offline changes for both data and metadata of the filesystem. |
| 96 | If you say yes here you should also select a hashing algorithm such as |
| 97 | sha256, these are not selected automatically since there are many |
| 98 | different options. |