1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "F2FS filesystem support"
9 select F2FS_FS_XATTR if FS_ENCRYPTION
10 select FS_ENCRYPTION_ALGS if FS_ENCRYPTION
12 select LZ4_COMPRESS if F2FS_FS_LZ4
13 select LZ4_DECOMPRESS if F2FS_FS_LZ4
14 select LZ4HC_COMPRESS if F2FS_FS_LZ4HC
15 select LZO_COMPRESS if F2FS_FS_LZO
16 select LZO_DECOMPRESS if F2FS_FS_LZO
17 select ZSTD_COMPRESS if F2FS_FS_ZSTD
18 select ZSTD_DECOMPRESS if F2FS_FS_ZSTD
20 F2FS is based on Log-structured File System (LFS), which supports
21 versatile "flash-friendly" features. The design has been focused on
22 addressing the fundamental issues in LFS, which are snowball effect
23 of wandering tree and high cleaning overhead.
25 Since flash-based storages show different characteristics according to
26 the internal geometry or flash memory management schemes aka FTL, F2FS
27 and tools support various parameters not only for configuring on-disk
28 layout, but also for selecting allocation and cleaning algorithms.
33 bool "F2FS Status Information"
37 /sys/kernel/debug/f2fs/ contains information about all the partitions
38 mounted as f2fs. Each file shows the whole f2fs information.
40 /sys/kernel/debug/f2fs/status includes:
41 - major filesystem information managed by f2fs currently
42 - average SIT information about whole segments
43 - current memory footprint consumed by f2fs.
46 bool "F2FS extended attributes"
50 Extended attributes are name:value pairs associated with inodes by
51 the kernel or by users (see the attr(5) manual page for details).
55 config F2FS_FS_POSIX_ACL
56 bool "F2FS Access Control Lists"
57 depends on F2FS_FS_XATTR
61 Posix Access Control Lists (ACLs) support permissions for users and
62 groups beyond the owner/group/world scheme.
64 If you don't know what Access Control Lists are, say N
66 config F2FS_FS_SECURITY
67 bool "F2FS Security Labels"
68 depends on F2FS_FS_XATTR
70 Security labels provide an access control facility to support Linux
71 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
72 Linux. This option enables an extended attribute handler for file
73 security labels in the f2fs filesystem, so that it requires enabling
74 the extended attribute support in advance. In particular you need this
75 option if you use the setcap command to assign initial process capabi-
76 lities to executables (the security.* extended attributes).
78 If you are not using a security module, say N.
81 bool "F2FS consistency checking feature"
84 Enables BUG_ONs which check the filesystem consistency in runtime.
86 If you want to improve the performance, say N.
88 config F2FS_FAULT_INJECTION
89 bool "F2FS fault injection facility"
92 Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on.
96 config F2FS_FS_COMPRESSION
97 bool "F2FS compression feature"
100 Enable filesystem-level compression on f2fs regular files,
101 multiple back-end compression algorithms are supported.
104 bool "LZO compression support"
105 depends on F2FS_FS_COMPRESSION
108 Support LZO compress algorithm, if unsure, say Y.
110 config F2FS_FS_LZORLE
111 bool "LZO-RLE compression support"
112 depends on F2FS_FS_LZO
115 Support LZO-RLE compress algorithm, if unsure, say Y.
118 bool "LZ4 compression support"
119 depends on F2FS_FS_COMPRESSION
122 Support LZ4 compress algorithm, if unsure, say Y.
125 bool "LZ4HC compression support"
126 depends on F2FS_FS_LZ4
129 Support LZ4HC compress algorithm, LZ4HC has compatible on-disk
130 layout with LZ4, if unsure, say Y.
133 bool "ZSTD compression support"
134 depends on F2FS_FS_COMPRESSION
137 Support ZSTD compress algorithm, if unsure, say Y.
140 bool "F2FS IO statistics information"
144 Support getting IO statistics through sysfs and printing out periodic
145 IO statistics tracepoint events. You have to turn on "iostat_enable"
146 sysfs node to enable this feature.
148 config F2FS_UNFAIR_RWSEM
149 bool "F2FS unfair rw_semaphore"
150 depends on F2FS_FS && BLK_CGROUP
152 Use unfair rw_semaphore, if system configured IO priority by block