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- # 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.
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