1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 2a14d5393SJaegeuk Kimconfig F2FS_FS 3d7196c5aSJaegeuk Kim tristate "F2FS filesystem support" 4573ea5fcSJaegeuk Kim depends on BLOCK 5aabc172bSYueHaibing select NLS 643b6573bSKeith Mok select CRYPTO 743b6573bSKeith Mok select CRYPTO_CRC32 8643fa961SChandan Rajendra select F2FS_FS_XATTR if FS_ENCRYPTION 9*ede7a09fSHerbert Xu select FS_ENCRYPTION_ALGS if FS_ENCRYPTION 10a14d5393SJaegeuk Kim help 11a14d5393SJaegeuk Kim F2FS is based on Log-structured File System (LFS), which supports 12a14d5393SJaegeuk Kim versatile "flash-friendly" features. The design has been focused on 13a14d5393SJaegeuk Kim addressing the fundamental issues in LFS, which are snowball effect 14a14d5393SJaegeuk Kim of wandering tree and high cleaning overhead. 15a14d5393SJaegeuk Kim 16a14d5393SJaegeuk Kim Since flash-based storages show different characteristics according to 17a14d5393SJaegeuk Kim the internal geometry or flash memory management schemes aka FTL, F2FS 18a14d5393SJaegeuk Kim and tools support various parameters not only for configuring on-disk 19a14d5393SJaegeuk Kim layout, but also for selecting allocation and cleaning algorithms. 20a14d5393SJaegeuk Kim 21a14d5393SJaegeuk Kim If unsure, say N. 22a14d5393SJaegeuk Kim 23a14d5393SJaegeuk Kimconfig F2FS_STAT_FS 24a14d5393SJaegeuk Kim bool "F2FS Status Information" 25a14d5393SJaegeuk Kim depends on F2FS_FS && DEBUG_FS 26a14d5393SJaegeuk Kim default y 27a14d5393SJaegeuk Kim help 28a14d5393SJaegeuk Kim /sys/kernel/debug/f2fs/ contains information about all the partitions 29a14d5393SJaegeuk Kim mounted as f2fs. Each file shows the whole f2fs information. 30a14d5393SJaegeuk Kim 31a14d5393SJaegeuk Kim /sys/kernel/debug/f2fs/status includes: 32a14d5393SJaegeuk Kim - major filesystem information managed by f2fs currently 33a14d5393SJaegeuk Kim - average SIT information about whole segments 34a14d5393SJaegeuk Kim - current memory footprint consumed by f2fs. 35a14d5393SJaegeuk Kim 36a14d5393SJaegeuk Kimconfig F2FS_FS_XATTR 37a14d5393SJaegeuk Kim bool "F2FS extended attributes" 38a14d5393SJaegeuk Kim depends on F2FS_FS 39a14d5393SJaegeuk Kim default y 40a14d5393SJaegeuk Kim help 41a14d5393SJaegeuk Kim Extended attributes are name:value pairs associated with inodes by 4291581e4cSAdam Borowski the kernel or by users (see the attr(5) manual page for details). 43a14d5393SJaegeuk Kim 44a14d5393SJaegeuk Kim If unsure, say N. 45a14d5393SJaegeuk Kim 46a14d5393SJaegeuk Kimconfig F2FS_FS_POSIX_ACL 47a14d5393SJaegeuk Kim bool "F2FS Access Control Lists" 48a14d5393SJaegeuk Kim depends on F2FS_FS_XATTR 49a14d5393SJaegeuk Kim select FS_POSIX_ACL 50a14d5393SJaegeuk Kim default y 51a14d5393SJaegeuk Kim help 52a14d5393SJaegeuk Kim Posix Access Control Lists (ACLs) support permissions for users and 53217940d4SJunesung Lee groups beyond the owner/group/world scheme. 54a14d5393SJaegeuk Kim 55a14d5393SJaegeuk Kim If you don't know what Access Control Lists are, say N 568ae8f162SJaegeuk Kim 578ae8f162SJaegeuk Kimconfig F2FS_FS_SECURITY 588ae8f162SJaegeuk Kim bool "F2FS Security Labels" 598ae8f162SJaegeuk Kim depends on F2FS_FS_XATTR 608ae8f162SJaegeuk Kim help 618ae8f162SJaegeuk Kim Security labels provide an access control facility to support Linux 628ae8f162SJaegeuk Kim Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO 638ae8f162SJaegeuk Kim Linux. This option enables an extended attribute handler for file 648ae8f162SJaegeuk Kim security labels in the f2fs filesystem, so that it requires enabling 65bd7253bcSLockywolf the extended attribute support in advance. In particular you need this 66bd7253bcSLockywolf option if you use the setcap command to assign initial process capabi- 67bd7253bcSLockywolf lities to executables (the security.* extended attributes). 688ae8f162SJaegeuk Kim 698ae8f162SJaegeuk Kim If you are not using a security module, say N. 703b218e3aSJaegeuk Kim 713b218e3aSJaegeuk Kimconfig F2FS_CHECK_FS 723b218e3aSJaegeuk Kim bool "F2FS consistency checking feature" 733b218e3aSJaegeuk Kim depends on F2FS_FS 743b218e3aSJaegeuk Kim help 753b218e3aSJaegeuk Kim Enables BUG_ONs which check the filesystem consistency in runtime. 763b218e3aSJaegeuk Kim 773b218e3aSJaegeuk Kim If you want to improve the performance, say N. 7863f92ddcSJaegeuk Kim 7963f92ddcSJaegeuk Kimconfig F2FS_IO_TRACE 8063f92ddcSJaegeuk Kim bool "F2FS IO tracer" 8163f92ddcSJaegeuk Kim depends on F2FS_FS 8263f92ddcSJaegeuk Kim depends on FUNCTION_TRACER 8363f92ddcSJaegeuk Kim help 8463f92ddcSJaegeuk Kim F2FS IO trace is based on a function trace, which gathers process 8563f92ddcSJaegeuk Kim information and block IO patterns in the filesystem level. 8663f92ddcSJaegeuk Kim 8763f92ddcSJaegeuk Kim If unsure, say N. 8873faec4dSJaegeuk Kim 8973faec4dSJaegeuk Kimconfig F2FS_FAULT_INJECTION 9073faec4dSJaegeuk Kim bool "F2FS fault injection facility" 9173faec4dSJaegeuk Kim depends on F2FS_FS 9273faec4dSJaegeuk Kim help 9373faec4dSJaegeuk Kim Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on. 9473faec4dSJaegeuk Kim 9573faec4dSJaegeuk Kim If unsure, say N. 96