| 1 | # SPDX-License-Identifier: GPL-2.0-only |
| 2 | config F2FS_FS |
| 3 | tristate "F2FS filesystem support" |
| 4 | depends on BLOCK |
| 5 | select BUFFER_HEAD |
| 6 | select NLS |
| 7 | select CRC32 |
| 8 | select F2FS_FS_XATTR if FS_ENCRYPTION |
| 9 | select FS_ENCRYPTION_ALGS if FS_ENCRYPTION |
| 10 | select FS_IOMAP |
| 11 | select LZ4_COMPRESS if F2FS_FS_LZ4 |
| 12 | select LZ4_DECOMPRESS if F2FS_FS_LZ4 |
| 13 | select LZ4HC_COMPRESS if F2FS_FS_LZ4HC |
| 14 | select LZO_COMPRESS if F2FS_FS_LZO |
| 15 | select LZO_DECOMPRESS if F2FS_FS_LZO |
| 16 | select ZSTD_COMPRESS if F2FS_FS_ZSTD |
| 17 | select ZSTD_DECOMPRESS if F2FS_FS_ZSTD |
| 18 | help |
| 19 | F2FS is based on Log-structured File System (LFS), which supports |
| 20 | versatile "flash-friendly" features. The design has been focused on |
| 21 | addressing the fundamental issues in LFS, which are snowball effect |
| 22 | of wandering tree and high cleaning overhead. |
| 23 | |
| 24 | Since flash-based storages show different characteristics according to |
| 25 | the internal geometry or flash memory management schemes aka FTL, F2FS |
| 26 | and tools support various parameters not only for configuring on-disk |
| 27 | layout, but also for selecting allocation and cleaning algorithms. |
| 28 | |
| 29 | If unsure, say N. |
| 30 | |
| 31 | config F2FS_STAT_FS |
| 32 | bool "F2FS Status Information" |
| 33 | depends on F2FS_FS |
| 34 | default y |
| 35 | help |
| 36 | /sys/kernel/debug/f2fs/ contains information about all the partitions |
| 37 | mounted as f2fs. Each file shows the whole f2fs information. |
| 38 | |
| 39 | /sys/kernel/debug/f2fs/status includes: |
| 40 | - major filesystem information managed by f2fs currently |
| 41 | - average SIT information about whole segments |
| 42 | - current memory footprint consumed by f2fs. |
| 43 | |
| 44 | config F2FS_FS_XATTR |
| 45 | bool "F2FS extended attributes" |
| 46 | depends on F2FS_FS |
| 47 | default y |
| 48 | help |
| 49 | Extended attributes are name:value pairs associated with inodes by |
| 50 | the kernel or by users (see the attr(5) manual page for details). |
| 51 | |
| 52 | If unsure, say N. |
| 53 | |
| 54 | config F2FS_FS_POSIX_ACL |
| 55 | bool "F2FS Access Control Lists" |
| 56 | depends on F2FS_FS_XATTR |
| 57 | select FS_POSIX_ACL |
| 58 | default y |
| 59 | help |
| 60 | Posix Access Control Lists (ACLs) support permissions for users and |
| 61 | groups beyond the owner/group/world scheme. |
| 62 | |
| 63 | If you don't know what Access Control Lists are, say N |
| 64 | |
| 65 | config F2FS_FS_SECURITY |
| 66 | bool "F2FS Security Labels" |
| 67 | depends on F2FS_FS_XATTR |
| 68 | help |
| 69 | Security labels provide an access control facility to support Linux |
| 70 | Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO |
| 71 | Linux. This option enables an extended attribute handler for file |
| 72 | security labels in the f2fs filesystem, so that it requires enabling |
| 73 | the extended attribute support in advance. In particular you need this |
| 74 | option if you use the setcap command to assign initial process capabi- |
| 75 | lities to executables (the security.* extended attributes). |
| 76 | |
| 77 | If you are not using a security module, say N. |
| 78 | |
| 79 | config F2FS_CHECK_FS |
| 80 | bool "F2FS consistency checking feature" |
| 81 | depends on F2FS_FS |
| 82 | help |
| 83 | Enables BUG_ONs which check the filesystem consistency in runtime. |
| 84 | |
| 85 | If you want to improve the performance, say N. |
| 86 | |
| 87 | config F2FS_FAULT_INJECTION |
| 88 | bool "F2FS fault injection facility" |
| 89 | depends on F2FS_FS |
| 90 | help |
| 91 | Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on. |
| 92 | |
| 93 | If unsure, say N. |
| 94 | |
| 95 | config F2FS_FS_COMPRESSION |
| 96 | bool "F2FS compression feature" |
| 97 | depends on F2FS_FS |
| 98 | help |
| 99 | Enable filesystem-level compression on f2fs regular files, |
| 100 | multiple back-end compression algorithms are supported. |
| 101 | |
| 102 | config F2FS_FS_LZO |
| 103 | bool "LZO compression support" |
| 104 | depends on F2FS_FS_COMPRESSION |
| 105 | default y |
| 106 | help |
| 107 | Support LZO compress algorithm, if unsure, say Y. |
| 108 | |
| 109 | config F2FS_FS_LZORLE |
| 110 | bool "LZO-RLE compression support" |
| 111 | depends on F2FS_FS_LZO |
| 112 | default y |
| 113 | help |
| 114 | Support LZO-RLE compress algorithm, if unsure, say Y. |
| 115 | |
| 116 | config F2FS_FS_LZ4 |
| 117 | bool "LZ4 compression support" |
| 118 | depends on F2FS_FS_COMPRESSION |
| 119 | default y |
| 120 | help |
| 121 | Support LZ4 compress algorithm, if unsure, say Y. |
| 122 | |
| 123 | config F2FS_FS_LZ4HC |
| 124 | bool "LZ4HC compression support" |
| 125 | depends on F2FS_FS_LZ4 |
| 126 | default y |
| 127 | help |
| 128 | Support LZ4HC compress algorithm, LZ4HC has compatible on-disk |
| 129 | layout with LZ4, if unsure, say Y. |
| 130 | |
| 131 | config F2FS_FS_ZSTD |
| 132 | bool "ZSTD compression support" |
| 133 | depends on F2FS_FS_COMPRESSION |
| 134 | default y |
| 135 | help |
| 136 | Support ZSTD compress algorithm, if unsure, say Y. |
| 137 | |
| 138 | config F2FS_IOSTAT |
| 139 | bool "F2FS IO statistics information" |
| 140 | depends on F2FS_FS |
| 141 | default y |
| 142 | help |
| 143 | Support getting IO statistics through sysfs and printing out periodic |
| 144 | IO statistics tracepoint events. You have to turn on "iostat_enable" |
| 145 | sysfs node to enable this feature. |
| 146 | |
| 147 | config F2FS_UNFAIR_RWSEM |
| 148 | bool "F2FS unfair rw_semaphore" |
| 149 | depends on F2FS_FS && BLK_CGROUP |
| 150 | help |
| 151 | Use unfair rw_semaphore, if system configured IO priority by block |
| 152 | cgroup. |