Eric Lee / smarc-fsl-linux-kernel

Blame view

fs/ubifs/Kconfig 2.49 KB
edit raw normal view history
81f7e3824   Eric Lee   Initial Release, ... 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
 
  config UBIFS_FS
  	tristate "UBIFS file system support"
  	select CRC16
  	select CRC32
  	select CRYPTO if UBIFS_FS_ADVANCED_COMPR
  	select CRYPTO if UBIFS_FS_LZO
  	select CRYPTO if UBIFS_FS_ZLIB
  	select CRYPTO_LZO if UBIFS_FS_LZO
  	select CRYPTO_DEFLATE if UBIFS_FS_ZLIB
  	depends on MTD_UBI
  	help
  	  UBIFS is a file system for flash devices which works on top of UBI.
  
  config UBIFS_FS_ADVANCED_COMPR
  	bool "Advanced compression options"
  	depends on UBIFS_FS
  	help
  	  This option allows to explicitly choose which compressions, if any,
  	  are enabled in UBIFS. Removing compressors means inability to read
  	  existing file systems.
  
  	  If unsure, say 'N'.
  
  config UBIFS_FS_LZO
  	bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR
  	depends on UBIFS_FS
  	default y
  	help
  	   LZO compressor is generally faster than zlib but compresses worse.
  	   Say 'Y' if unsure.
  
  config UBIFS_FS_ZLIB
  	bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR
  	depends on UBIFS_FS
  	default y
  	help
  	  Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
  
  config UBIFS_ATIME_SUPPORT
  	bool "Access time support" if UBIFS_FS
  	depends on UBIFS_FS
  	default n
  	help
  	  Originally UBIFS did not support atime, because it looked like a bad idea due
  	  increased flash wear. This option adds atime support and it is disabled by default
  	  to preserve the old behavior. If you enable this option, UBIFS starts updating atime,
  	  which means that file-system read operations will cause writes (inode atime
  	  updates). This may affect file-system performance and increase flash device wear,
  	  so be careful. How often atime is updated depends on the selected strategy:
  	  strictatime is the "heavy", relatime is "lighter", etc.
  
  	  If unsure, say 'N'
  
  config UBIFS_FS_ENCRYPTION
  	bool "UBIFS Encryption"
  	depends on UBIFS_FS && BLOCK
  	select FS_ENCRYPTION
  	default n
  	help
  	  Enable encryption of UBIFS files and directories. This
  	  feature is similar to ecryptfs, but it is more memory
  	  efficient since it avoids caching the encrypted and
  	  decrypted pages in the page cache.
  
  config UBIFS_FS_SECURITY
  	bool "UBIFS Security Labels"
  	depends on UBIFS_FS
  	default y
  	help
  	  Security labels provide an access control facility to support Linux
  	  Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
  	  Linux. This option enables an extended attribute handler for file
  	  security labels in the ubifs filesystem, so that it requires enabling
  	  the extended attribute support in advance.
  
  	  If you are not using a security module, say N.