1a14d5393SJaegeuk Kimconfig F2FS_FS 2d7196c5aSJaegeuk Kim tristate "F2FS filesystem support" 3573ea5fcSJaegeuk Kim depends on BLOCK 443b6573bSKeith Mok select CRYPTO 543b6573bSKeith Mok select CRYPTO_CRC32 6643fa961SChandan Rajendra select F2FS_FS_XATTR if FS_ENCRYPTION 7a14d5393SJaegeuk Kim help 8a14d5393SJaegeuk Kim F2FS is based on Log-structured File System (LFS), which supports 9a14d5393SJaegeuk Kim versatile "flash-friendly" features. The design has been focused on 10a14d5393SJaegeuk Kim addressing the fundamental issues in LFS, which are snowball effect 11a14d5393SJaegeuk Kim of wandering tree and high cleaning overhead. 12a14d5393SJaegeuk Kim 13a14d5393SJaegeuk Kim Since flash-based storages show different characteristics according to 14a14d5393SJaegeuk Kim the internal geometry or flash memory management schemes aka FTL, F2FS 15a14d5393SJaegeuk Kim and tools support various parameters not only for configuring on-disk 16a14d5393SJaegeuk Kim layout, but also for selecting allocation and cleaning algorithms. 17a14d5393SJaegeuk Kim 18a14d5393SJaegeuk Kim If unsure, say N. 19a14d5393SJaegeuk Kim 20a14d5393SJaegeuk Kimconfig F2FS_STAT_FS 21a14d5393SJaegeuk Kim bool "F2FS Status Information" 22a14d5393SJaegeuk Kim depends on F2FS_FS && DEBUG_FS 23a14d5393SJaegeuk Kim default y 24a14d5393SJaegeuk Kim help 25a14d5393SJaegeuk Kim /sys/kernel/debug/f2fs/ contains information about all the partitions 26a14d5393SJaegeuk Kim mounted as f2fs. Each file shows the whole f2fs information. 27a14d5393SJaegeuk Kim 28a14d5393SJaegeuk Kim /sys/kernel/debug/f2fs/status includes: 29a14d5393SJaegeuk Kim - major filesystem information managed by f2fs currently 30a14d5393SJaegeuk Kim - average SIT information about whole segments 31a14d5393SJaegeuk Kim - current memory footprint consumed by f2fs. 32a14d5393SJaegeuk Kim 33a14d5393SJaegeuk Kimconfig F2FS_FS_XATTR 34a14d5393SJaegeuk Kim bool "F2FS extended attributes" 35a14d5393SJaegeuk Kim depends on F2FS_FS 36a14d5393SJaegeuk Kim default y 37a14d5393SJaegeuk Kim help 38a14d5393SJaegeuk Kim Extended attributes are name:value pairs associated with inodes by 3991581e4cSAdam Borowski the kernel or by users (see the attr(5) manual page for details). 40a14d5393SJaegeuk Kim 41a14d5393SJaegeuk Kim If unsure, say N. 42a14d5393SJaegeuk Kim 43a14d5393SJaegeuk Kimconfig F2FS_FS_POSIX_ACL 44a14d5393SJaegeuk Kim bool "F2FS Access Control Lists" 45a14d5393SJaegeuk Kim depends on F2FS_FS_XATTR 46a14d5393SJaegeuk Kim select FS_POSIX_ACL 47a14d5393SJaegeuk Kim default y 48a14d5393SJaegeuk Kim help 49a14d5393SJaegeuk Kim Posix Access Control Lists (ACLs) support permissions for users and 50217940d4SJunesung Lee groups beyond the owner/group/world scheme. 51a14d5393SJaegeuk Kim 52a14d5393SJaegeuk Kim If you don't know what Access Control Lists are, say N 538ae8f162SJaegeuk Kim 548ae8f162SJaegeuk Kimconfig F2FS_FS_SECURITY 558ae8f162SJaegeuk Kim bool "F2FS Security Labels" 568ae8f162SJaegeuk Kim depends on F2FS_FS_XATTR 578ae8f162SJaegeuk Kim help 588ae8f162SJaegeuk Kim Security labels provide an access control facility to support Linux 598ae8f162SJaegeuk Kim Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO 608ae8f162SJaegeuk Kim Linux. This option enables an extended attribute handler for file 618ae8f162SJaegeuk Kim security labels in the f2fs filesystem, so that it requires enabling 628ae8f162SJaegeuk Kim the extended attribute support in advance. 638ae8f162SJaegeuk Kim 648ae8f162SJaegeuk Kim If you are not using a security module, say N. 653b218e3aSJaegeuk Kim 663b218e3aSJaegeuk Kimconfig F2FS_CHECK_FS 673b218e3aSJaegeuk Kim bool "F2FS consistency checking feature" 683b218e3aSJaegeuk Kim depends on F2FS_FS 693b218e3aSJaegeuk Kim help 703b218e3aSJaegeuk Kim Enables BUG_ONs which check the filesystem consistency in runtime. 713b218e3aSJaegeuk Kim 723b218e3aSJaegeuk Kim If you want to improve the performance, say N. 7363f92ddcSJaegeuk Kim 7463f92ddcSJaegeuk Kimconfig F2FS_IO_TRACE 7563f92ddcSJaegeuk Kim bool "F2FS IO tracer" 7663f92ddcSJaegeuk Kim depends on F2FS_FS 7763f92ddcSJaegeuk Kim depends on FUNCTION_TRACER 7863f92ddcSJaegeuk Kim help 7963f92ddcSJaegeuk Kim F2FS IO trace is based on a function trace, which gathers process 8063f92ddcSJaegeuk Kim information and block IO patterns in the filesystem level. 8163f92ddcSJaegeuk Kim 8263f92ddcSJaegeuk Kim If unsure, say N. 8373faec4dSJaegeuk Kim 8473faec4dSJaegeuk Kimconfig F2FS_FAULT_INJECTION 8573faec4dSJaegeuk Kim bool "F2FS fault injection facility" 8673faec4dSJaegeuk Kim depends on F2FS_FS 8773faec4dSJaegeuk Kim help 8873faec4dSJaegeuk Kim Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on. 8973faec4dSJaegeuk Kim 9073faec4dSJaegeuk Kim If unsure, say N. 91