# SPDX-License-Identifier: GPL-2.0-only
config F2FS_FS
tristate "F2FS filesystem support"
depends on BLOCK
select BUFFER_HEAD
select NLS
select 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 notusing 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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