1config 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 10 depends on MTD_UBI 11 help 12 UBIFS is a file system for flash devices which works on top of UBI. 13 14config UBIFS_FS_XATTR 15 bool "Extended attributes support" 16 depends on UBIFS_FS 17 help 18 This option enables support of extended attributes. 19 20config UBIFS_FS_ADVANCED_COMPR 21 bool "Advanced compression options" 22 depends on UBIFS_FS 23 help 24 This option allows to explicitly choose which compressions, if any, 25 are enabled in UBIFS. Removing compressors means inbility to read 26 existing file systems. 27 28 If unsure, say 'N'. 29 30config UBIFS_FS_LZO 31 bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR 32 depends on UBIFS_FS 33 default y 34 help 35 LZO compressor is generally faster then zlib but compresses worse. 36 Say 'Y' if unsure. 37 38config UBIFS_FS_ZLIB 39 bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR 40 depends on UBIFS_FS 41 default y 42 help 43 Zlib copresses better then LZO but it is slower. Say 'Y' if unsure. 44 45# Debugging-related stuff 46config UBIFS_FS_DEBUG 47 bool "Enable debugging" 48 depends on UBIFS_FS 49 select DEBUG_FS 50 select KALLSYMS_ALL 51 help 52 This option enables UBIFS debugging. 53 54config UBIFS_FS_DEBUG_MSG_LVL 55 int "Default message level (0 = no extra messages, 3 = lots)" 56 depends on UBIFS_FS_DEBUG 57 default "0" 58 help 59 This controls the amount of debugging messages produced by UBIFS. 60 If reporting bugs, please try to have available a full dump of the 61 messages at level 1 while the misbehaviour was occurring. Level 2 62 may become necessary if level 1 messages were not enough to find the 63 bug. Generally Level 3 should be avoided. 64 65config UBIFS_FS_DEBUG_CHKS 66 bool "Enable extra checks" 67 depends on UBIFS_FS_DEBUG 68 help 69 If extra checks are enabled UBIFS will check the consistency of its 70 internal data structures during operation. However, UBIFS performance 71 is dramatically slower when this option is selected especially if the 72 file system is large. 73