1 # SPDX-License-Identifier: GPL-2.0-only <<
2 config UBIFS_FS 1 config UBIFS_FS
3 tristate "UBIFS file system support" 2 tristate "UBIFS file system support"
4 select CRC16 3 select CRC16
5 select CRC32 4 select CRC32
6 select CRYPTO if UBIFS_FS_ADVANCED_COM 5 select CRYPTO if UBIFS_FS_ADVANCED_COMPR
7 select CRYPTO if UBIFS_FS_LZO 6 select CRYPTO if UBIFS_FS_LZO
8 select CRYPTO if UBIFS_FS_ZLIB 7 select CRYPTO if UBIFS_FS_ZLIB
9 select CRYPTO if UBIFS_FS_ZSTD <<
10 select CRYPTO_LZO if UBIFS_FS_LZO 8 select CRYPTO_LZO if UBIFS_FS_LZO
11 select CRYPTO_DEFLATE if UBIFS_FS_ZLIB 9 select CRYPTO_DEFLATE if UBIFS_FS_ZLIB
12 select CRYPTO_ZSTD if UBIFS_FS_ZSTD <<
13 select CRYPTO_HASH_INFO 10 select CRYPTO_HASH_INFO
14 select UBIFS_FS_XATTR if FS_ENCRYPTION <<
15 select FS_ENCRYPTION_ALGS if FS_ENCRYP <<
16 depends on MTD_UBI 11 depends on MTD_UBI
17 help 12 help
18 UBIFS is a file system for flash dev 13 UBIFS is a file system for flash devices which works on top of UBI.
19 14
20 if UBIFS_FS 15 if UBIFS_FS
21 16
22 config UBIFS_FS_ADVANCED_COMPR 17 config UBIFS_FS_ADVANCED_COMPR
23 bool "Advanced compression options" 18 bool "Advanced compression options"
24 help 19 help
25 This option allows to explicitly cho 20 This option allows to explicitly choose which compressions, if any,
26 are enabled in UBIFS. Removing compr 21 are enabled in UBIFS. Removing compressors means inability to read
27 existing file systems. 22 existing file systems.
28 23
29 If unsure, say 'N'. 24 If unsure, say 'N'.
30 25
31 config UBIFS_FS_LZO 26 config UBIFS_FS_LZO
32 bool "LZO compression support" if UBIF 27 bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR
33 default y 28 default y
34 help 29 help
35 LZO compressor is generally faster 30 LZO compressor is generally faster than zlib but compresses worse.
36 Say 'Y' if unsure. 31 Say 'Y' if unsure.
37 32
38 config UBIFS_FS_ZLIB 33 config UBIFS_FS_ZLIB
39 bool "ZLIB compression support" if UBI 34 bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR
40 default y 35 default y
41 help 36 help
42 Zlib compresses better than LZO but 37 Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
43 38
44 config UBIFS_FS_ZSTD <<
45 bool "ZSTD compression support" if UBI <<
46 depends on UBIFS_FS <<
47 default y <<
48 help <<
49 ZSTD compresses is a big win in spee <<
50 in compression ratio over LZO. Say ' <<
51 <<
52 config UBIFS_ATIME_SUPPORT 39 config UBIFS_ATIME_SUPPORT
53 bool "Access time support" 40 bool "Access time support"
54 default n 41 default n
55 help 42 help
56 Originally UBIFS did not support ati 43 Originally UBIFS did not support atime, because it looked like a bad idea due
57 increased flash wear. This option ad 44 increased flash wear. This option adds atime support and it is disabled by default
58 to preserve the old behavior. If you 45 to preserve the old behavior. If you enable this option, UBIFS starts updating atime,
59 which means that file-system read op 46 which means that file-system read operations will cause writes (inode atime
60 updates). This may affect file-syste 47 updates). This may affect file-system performance and increase flash device wear,
61 so be careful. How often atime is up 48 so be careful. How often atime is updated depends on the selected strategy:
62 strictatime is the "heavy", relatime 49 strictatime is the "heavy", relatime is "lighter", etc.
63 50
64 If unsure, say 'N' 51 If unsure, say 'N'
65 52
66 config UBIFS_FS_XATTR 53 config UBIFS_FS_XATTR
67 bool "UBIFS XATTR support" 54 bool "UBIFS XATTR support"
68 default y 55 default y
69 help 56 help
70 Saying Y here includes support for e 57 Saying Y here includes support for extended attributes (xattrs).
71 Xattrs are name:value pairs associat 58 Xattrs are name:value pairs associated with inodes by
72 the kernel or by users (see the attr 59 the kernel or by users (see the attr(5) manual page).
73 60
74 If unsure, say Y. 61 If unsure, say Y.
75 62
>> 63 config UBIFS_FS_ENCRYPTION
>> 64 bool "UBIFS Encryption"
>> 65 depends on UBIFS_FS_XATTR && BLOCK
>> 66 select FS_ENCRYPTION
>> 67 default n
>> 68 help
>> 69 Enable encryption of UBIFS files and directories. This
>> 70 feature is similar to ecryptfs, but it is more memory
>> 71 efficient since it avoids caching the encrypted and
>> 72 decrypted pages in the page cache.
>> 73
76 config UBIFS_FS_SECURITY 74 config UBIFS_FS_SECURITY
77 bool "UBIFS Security Labels" 75 bool "UBIFS Security Labels"
78 depends on UBIFS_FS_XATTR 76 depends on UBIFS_FS_XATTR
79 default y 77 default y
80 help 78 help
81 Security labels provide an access co 79 Security labels provide an access control facility to support Linux
82 Security Models (LSMs) accepted by A 80 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
83 Linux. This option enables an extend 81 Linux. This option enables an extended attribute handler for file
84 security labels in the ubifs filesys 82 security labels in the ubifs filesystem, so that it requires enabling
85 the extended attribute support in ad 83 the extended attribute support in advance.
86 84
87 If you are not using a security modu 85 If you are not using a security module, say N.
88 86
89 config UBIFS_FS_AUTHENTICATION 87 config UBIFS_FS_AUTHENTICATION
90 bool "UBIFS authentication support" 88 bool "UBIFS authentication support"
91 select KEYS !! 89 depends on KEYS
92 select CRYPTO_HMAC 90 select CRYPTO_HMAC
93 select SYSTEM_DATA_VERIFICATION <<
94 help 91 help
95 Enable authentication support for UB 92 Enable authentication support for UBIFS. This feature offers protection
96 against offline changes for both dat 93 against offline changes for both data and metadata of the filesystem.
97 If you say yes here you should also 94 If you say yes here you should also select a hashing algorithm such as
98 sha256, these are not selected autom 95 sha256, these are not selected automatically since there are many
99 different options. 96 different options.
100 97
101 endif # UBIFS_FS 98 endif # UBIFS_FS
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