| # 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. |
