# SPDX-License-Identifier: GPL-2.0-only config F2FS_FS tristate "F2FS filesystem support" depends on BLOCK select BUFFER_HEAD select NLS select CRYPTO select CRYPTO_CRC32 select F2FS_FS_XATTR if FS_ENCRYPTION select FS_ENCRYPTION_ALGS if FS_ENCRYPTION select FS_IOMAP select LZ4_COMPRESS if F2FS_FS_LZ4 select LZ4_DECOMPRESS if F2FS_FS_LZ4 select LZ4HC_COMPRESS if F2FS_FS_LZ4HC select LZO_COMPRESS if F2FS_FS_LZO select LZO_DECOMPRESS if F2FS_FS_LZO select ZSTD_COMPRESS if F2FS_FS_ZSTD select ZSTD_DECOMPRESS if F2FS_FS_ZSTD help F2FS is based on Log-structured File System (LFS), which supports versatile "flash-friendly" features. The design has been focused on addressing the fundamental issues in LFS, which are snowball effect of wandering tree and high cleaning overhead. Since flash-based storages show different characteristics according to the internal geometry or flash memory management schemes aka FTL, F2FS and tools support various parameters not only for configuring on-disk layout, but also for selecting allocation and cleaning algorithms. If unsure, say N. config F2FS_STAT_FS bool "F2FS Status Information" depends on F2FS_FS default y help /sys/kernel/debug/f2fs/ contains information about all the partitions mounted as f2fs. Each file shows the whole f2fs information. /sys/kernel/debug/f2fs/status includes: - major filesystem information managed by f2fs currently - average SIT information about whole segments - current memory footprint consumed by f2fs. config F2FS_FS_XATTR bool "F2FS extended attributes" depends on F2FS_FS default y help Extended attributes are name:value pairs associated with inodes by the kernel or by users (see the attr(5) manual page for details). If unsure, say N. config F2FS_FS_POSIX_ACL bool "F2FS Access Control Lists" depends on F2FS_FS_XATTR select FS_POSIX_ACL default y help Posix Access Control Lists (ACLs) support permissions for users and groups beyond the owner/group/world scheme. If you don't know what Access Control Lists are, say N config F2FS_FS_SECURITY bool "F2FS Security Labels" depends on F2FS_FS_XATTR 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 f2fs filesystem, so that it requires enabling the extended attribute support in advance. In particular you need this option if you use the setcap command to assign initial process capabi- lities to executables (the security.* extended attributes). If you are not using a security module, say N. config F2FS_CHECK_FS bool "F2FS consistency checking feature" depends on F2FS_FS help Enables BUG_ONs which check the filesystem consistency in runtime. If you want to improve the performance, say N. config F2FS_FAULT_INJECTION bool "F2FS fault injection facility" depends on F2FS_FS help Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on. If unsure, say N. config F2FS_FS_COMPRESSION bool "F2FS compression feature" depends on F2FS_FS help Enable filesystem-level compression on f2fs regular files, multiple back-end compression algorithms are supported. config F2FS_FS_LZO bool "LZO compression support" depends on F2FS_FS_COMPRESSION default y help Support LZO compress algorithm, if unsure, say Y. config F2FS_FS_LZORLE bool "LZO-RLE compression support" depends on F2FS_FS_LZO default y help Support LZO-RLE compress algorithm, if unsure, say Y. config F2FS_FS_LZ4 bool "LZ4 compression support" depends on F2FS_FS_COMPRESSION default y help Support LZ4 compress algorithm, if unsure, say Y. config F2FS_FS_LZ4HC bool "LZ4HC compression support" depends on F2FS_FS_LZ4 default y help Support LZ4HC compress algorithm, LZ4HC has compatible on-disk layout with LZ4, if unsure, say Y. config F2FS_FS_ZSTD bool "ZSTD compression support" depends on F2FS_FS_COMPRESSION default y help Support ZSTD compress algorithm, if unsure, say Y. config F2FS_IOSTAT bool "F2FS IO statistics information" depends on F2FS_FS default y help Support getting IO statistics through sysfs and printing out periodic IO statistics tracepoint events. You have to turn on "iostat_enable" sysfs node to enable this feature. config F2FS_UNFAIR_RWSEM bool "F2FS unfair rw_semaphore" depends on F2FS_FS && BLK_CGROUP help Use unfair rw_semaphore, if system configured IO priority by block cgroup.