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ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
0d7eff87 AB |
2 | config UBIFS_FS |
3 | tristate "UBIFS file system support" | |
4 | select CRC16 | |
5 | select CRC32 | |
6 | select CRYPTO if UBIFS_FS_ADVANCED_COMPR | |
7 | select CRYPTO if UBIFS_FS_LZO | |
8 | select CRYPTO if UBIFS_FS_ZLIB | |
9 | select CRYPTO_LZO if UBIFS_FS_LZO | |
10 | select CRYPTO_DEFLATE if UBIFS_FS_ZLIB | |
49525e5e | 11 | select CRYPTO_HASH_INFO |
643fa961 | 12 | select UBIFS_FS_XATTR if FS_ENCRYPTION |
0d7eff87 AB |
13 | depends on MTD_UBI |
14 | help | |
15 | UBIFS is a file system for flash devices which works on top of UBI. | |
16 | ||
aa3d31e0 GU |
17 | if UBIFS_FS |
18 | ||
0d7eff87 AB |
19 | config UBIFS_FS_ADVANCED_COMPR |
20 | bool "Advanced compression options" | |
0d7eff87 AB |
21 | help |
22 | This option allows to explicitly choose which compressions, if any, | |
692105b8 | 23 | are enabled in UBIFS. Removing compressors means inability to read |
0d7eff87 AB |
24 | existing file systems. |
25 | ||
26 | If unsure, say 'N'. | |
27 | ||
28 | config UBIFS_FS_LZO | |
29 | bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR | |
0d7eff87 AB |
30 | default y |
31 | help | |
692105b8 | 32 | LZO compressor is generally faster than zlib but compresses worse. |
0d7eff87 AB |
33 | Say 'Y' if unsure. |
34 | ||
35 | config UBIFS_FS_ZLIB | |
36 | bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR | |
0d7eff87 AB |
37 | default y |
38 | help | |
025dfdaf | 39 | Zlib compresses better than LZO but it is slower. Say 'Y' if unsure. |
8c1c5f26 DY |
40 | |
41 | config UBIFS_ATIME_SUPPORT | |
aa3d31e0 | 42 | bool "Access time support" |
8c1c5f26 DY |
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' | |
d475a507 | 54 | |
7e5471ce SA |
55 | config UBIFS_FS_XATTR |
56 | bool "UBIFS XATTR support" | |
7e5471ce SA |
57 | default y |
58 | help | |
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). | |
62 | ||
63 | If unsure, say Y. | |
64 | ||
8326c1ee HL |
65 | config UBIFS_FS_SECURITY |
66 | bool "UBIFS Security Labels" | |
aa3d31e0 | 67 | depends on UBIFS_FS_XATTR |
8326c1ee HL |
68 | default y |
69 | help | |
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. | |
75 | ||
76 | If you are not using a security module, say N. | |
d8a22773 SH |
77 | |
78 | config UBIFS_FS_AUTHENTICATION | |
79 | bool "UBIFS authentication support" | |
60eb5da2 | 80 | depends on KEYS |
d8a22773 SH |
81 | select CRYPTO_HMAC |
82 | help | |
83 | Enable authentication support for UBIFS. This feature offers protection | |
84 | against offline changes for both data and metadata of the filesystem. | |
85 | If you say yes here you should also select a hashing algorithm such as | |
86 | sha256, these are not selected automatically since there are many | |
87 | different options. | |
aa3d31e0 GU |
88 | |
89 | endif # UBIFS_FS |