1# SPDX-License-Identifier: GPL-2.0-only 2config F2FS_FS 3 tristate "F2FS filesystem support" 4 depends on BLOCK 5 select NLS 6 select CRYPTO 7 select CRYPTO_CRC32 8 select F2FS_FS_XATTR if FS_ENCRYPTION 9 help 10 F2FS is based on Log-structured File System (LFS), which supports 11 versatile "flash-friendly" features. The design has been focused on 12 addressing the fundamental issues in LFS, which are snowball effect 13 of wandering tree and high cleaning overhead. 14 15 Since flash-based storages show different characteristics according to 16 the internal geometry or flash memory management schemes aka FTL, F2FS 17 and tools support various parameters not only for configuring on-disk 18 layout, but also for selecting allocation and cleaning algorithms. 19 20 If unsure, say N. 21 22config F2FS_STAT_FS 23 bool "F2FS Status Information" 24 depends on F2FS_FS 25 default y 26 help 27 /sys/kernel/debug/f2fs/ contains information about all the partitions 28 mounted as f2fs. Each file shows the whole f2fs information. 29 30 /sys/kernel/debug/f2fs/status includes: 31 - major filesystem information managed by f2fs currently 32 - average SIT information about whole segments 33 - current memory footprint consumed by f2fs. 34 35config F2FS_FS_XATTR 36 bool "F2FS extended attributes" 37 depends on F2FS_FS 38 default y 39 help 40 Extended attributes are name:value pairs associated with inodes by 41 the kernel or by users (see the attr(5) manual page for details). 42 43 If unsure, say N. 44 45config F2FS_FS_POSIX_ACL 46 bool "F2FS Access Control Lists" 47 depends on F2FS_FS_XATTR 48 select FS_POSIX_ACL 49 default y 50 help 51 Posix Access Control Lists (ACLs) support permissions for users and 52 groups beyond the owner/group/world scheme. 53 54 If you don't know what Access Control Lists are, say N 55 56config F2FS_FS_SECURITY 57 bool "F2FS Security Labels" 58 depends on F2FS_FS_XATTR 59 help 60 Security labels provide an access control facility to support Linux 61 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO 62 Linux. This option enables an extended attribute handler for file 63 security labels in the f2fs filesystem, so that it requires enabling 64 the extended attribute support in advance. In particular you need this 65 option if you use the setcap command to assign initial process capabi- 66 lities to executables (the security.* extended attributes). 67 68 If you are not using a security module, say N. 69 70config F2FS_CHECK_FS 71 bool "F2FS consistency checking feature" 72 depends on F2FS_FS 73 help 74 Enables BUG_ONs which check the filesystem consistency in runtime. 75 76 If you want to improve the performance, say N. 77 78config F2FS_IO_TRACE 79 bool "F2FS IO tracer" 80 depends on F2FS_FS 81 depends on FUNCTION_TRACER 82 help 83 F2FS IO trace is based on a function trace, which gathers process 84 information and block IO patterns in the filesystem level. 85 86 If unsure, say N. 87 88config F2FS_FAULT_INJECTION 89 bool "F2FS fault injection facility" 90 depends on F2FS_FS 91 help 92 Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on. 93 94 If unsure, say N. 95 96config F2FS_FS_COMPRESSION 97 bool "F2FS compression feature" 98 depends on F2FS_FS 99 help 100 Enable filesystem-level compression on f2fs regular files, 101 multiple back-end compression algorithms are supported. 102 103config F2FS_FS_LZO 104 bool "LZO compression support" 105 depends on F2FS_FS_COMPRESSION 106 select LZO_COMPRESS 107 select LZO_DECOMPRESS 108 default y 109 help 110 Support LZO compress algorithm, if unsure, say Y. 111 112config F2FS_FS_LZ4 113 bool "LZ4 compression support" 114 depends on F2FS_FS_COMPRESSION 115 select LZ4_COMPRESS 116 select LZ4_DECOMPRESS 117 default y 118 help 119 Support LZ4 compress algorithm, if unsure, say Y. 120