1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "F2FS filesystem support"
8 select F2FS_FS_XATTR if FS_ENCRYPTION
9 select FS_ENCRYPTION_ALGS if FS_ENCRYPTION
10 select LZ4_COMPRESS if F2FS_FS_LZ4
11 select LZ4_DECOMPRESS if F2FS_FS_LZ4
12 select LZ4HC_COMPRESS if F2FS_FS_LZ4HC
13 select LZO_COMPRESS if F2FS_FS_LZO
14 select LZO_DECOMPRESS if F2FS_FS_LZO
15 select ZSTD_COMPRESS if F2FS_FS_ZSTD
16 select ZSTD_DECOMPRESS if F2FS_FS_ZSTD
18 F2FS is based on Log-structured File System (LFS), which supports
19 versatile "flash-friendly" features. The design has been focused on
20 addressing the fundamental issues in LFS, which are snowball effect
21 of wandering tree and high cleaning overhead.
23 Since flash-based storages show different characteristics according to
24 the internal geometry or flash memory management schemes aka FTL, F2FS
25 and tools support various parameters not only for configuring on-disk
26 layout, but also for selecting allocation and cleaning algorithms.
31 bool "F2FS Status Information"
35 /sys/kernel/debug/f2fs/ contains information about all the partitions
36 mounted as f2fs. Each file shows the whole f2fs information.
38 /sys/kernel/debug/f2fs/status includes:
39 - major filesystem information managed by f2fs currently
40 - average SIT information about whole segments
41 - current memory footprint consumed by f2fs.
44 bool "F2FS extended attributes"
48 Extended attributes are name:value pairs associated with inodes by
49 the kernel or by users (see the attr(5) manual page for details).
53 config F2FS_FS_POSIX_ACL
54 bool "F2FS Access Control Lists"
55 depends on F2FS_FS_XATTR
59 Posix Access Control Lists (ACLs) support permissions for users and
60 groups beyond the owner/group/world scheme.
62 If you don't know what Access Control Lists are, say N
64 config F2FS_FS_SECURITY
65 bool "F2FS Security Labels"
66 depends on F2FS_FS_XATTR
68 Security labels provide an access control facility to support Linux
69 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
70 Linux. This option enables an extended attribute handler for file
71 security labels in the f2fs filesystem, so that it requires enabling
72 the extended attribute support in advance. In particular you need this
73 option if you use the setcap command to assign initial process capabi-
74 lities to executables (the security.* extended attributes).
76 If you are not using a security module, say N.
79 bool "F2FS consistency checking feature"
82 Enables BUG_ONs which check the filesystem consistency in runtime.
84 If you want to improve the performance, say N.
86 config F2FS_FAULT_INJECTION
87 bool "F2FS fault injection facility"
90 Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on.
94 config F2FS_FS_COMPRESSION
95 bool "F2FS compression feature"
98 Enable filesystem-level compression on f2fs regular files,
99 multiple back-end compression algorithms are supported.
102 bool "LZO compression support"
103 depends on F2FS_FS_COMPRESSION
106 Support LZO compress algorithm, if unsure, say Y.
108 config F2FS_FS_LZORLE
109 bool "LZO-RLE compression support"
110 depends on F2FS_FS_LZO
113 Support LZO-RLE compress algorithm, if unsure, say Y.
116 bool "LZ4 compression support"
117 depends on F2FS_FS_COMPRESSION
120 Support LZ4 compress algorithm, if unsure, say Y.
123 bool "LZ4HC compression support"
124 depends on F2FS_FS_LZ4
127 Support LZ4HC compress algorithm, LZ4HC has compatible on-disk
128 layout with LZ4, if unsure, say Y.
131 bool "ZSTD compression support"
132 depends on F2FS_FS_COMPRESSION
135 Support ZSTD compress algorithm, if unsure, say Y.
138 bool "F2FS IO statistics information"
142 Support getting IO statistics through sysfs and printing out periodic
143 IO statistics tracepoint events. You have to turn on "iostat_enable"
144 sysfs node to enable this feature.