1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 config F2FS_FS 2 config F2FS_FS
3 tristate "F2FS filesystem support" 3 tristate "F2FS filesystem support"
4 depends on BLOCK 4 depends on BLOCK
5 select BUFFER_HEAD <<
6 select NLS 5 select NLS
7 select CRYPTO 6 select CRYPTO
8 select CRYPTO_CRC32 7 select CRYPTO_CRC32
9 select F2FS_FS_XATTR if FS_ENCRYPTION 8 select F2FS_FS_XATTR if FS_ENCRYPTION
10 select FS_ENCRYPTION_ALGS if FS_ENCRYP 9 select FS_ENCRYPTION_ALGS if FS_ENCRYPTION
11 select FS_IOMAP <<
12 select LZ4_COMPRESS if F2FS_FS_LZ4 10 select LZ4_COMPRESS if F2FS_FS_LZ4
13 select LZ4_DECOMPRESS if F2FS_FS_LZ4 11 select LZ4_DECOMPRESS if F2FS_FS_LZ4
14 select LZ4HC_COMPRESS if F2FS_FS_LZ4HC 12 select LZ4HC_COMPRESS if F2FS_FS_LZ4HC
15 select LZO_COMPRESS if F2FS_FS_LZO 13 select LZO_COMPRESS if F2FS_FS_LZO
16 select LZO_DECOMPRESS if F2FS_FS_LZO 14 select LZO_DECOMPRESS if F2FS_FS_LZO
17 select ZSTD_COMPRESS if F2FS_FS_ZSTD 15 select ZSTD_COMPRESS if F2FS_FS_ZSTD
18 select ZSTD_DECOMPRESS if F2FS_FS_ZSTD 16 select ZSTD_DECOMPRESS if F2FS_FS_ZSTD
19 help 17 help
20 F2FS is based on Log-structured File 18 F2FS is based on Log-structured File System (LFS), which supports
21 versatile "flash-friendly" features. 19 versatile "flash-friendly" features. The design has been focused on
22 addressing the fundamental issues in 20 addressing the fundamental issues in LFS, which are snowball effect
23 of wandering tree and high cleaning 21 of wandering tree and high cleaning overhead.
24 22
25 Since flash-based storages show diff 23 Since flash-based storages show different characteristics according to
26 the internal geometry or flash memor 24 the internal geometry or flash memory management schemes aka FTL, F2FS
27 and tools support various parameters 25 and tools support various parameters not only for configuring on-disk
28 layout, but also for selecting alloc 26 layout, but also for selecting allocation and cleaning algorithms.
29 27
30 If unsure, say N. 28 If unsure, say N.
31 29
32 config F2FS_STAT_FS 30 config F2FS_STAT_FS
33 bool "F2FS Status Information" 31 bool "F2FS Status Information"
34 depends on F2FS_FS 32 depends on F2FS_FS
35 default y 33 default y
36 help 34 help
37 /sys/kernel/debug/f2fs/ contains inf 35 /sys/kernel/debug/f2fs/ contains information about all the partitions
38 mounted as f2fs. Each file shows the 36 mounted as f2fs. Each file shows the whole f2fs information.
39 37
40 /sys/kernel/debug/f2fs/status includ 38 /sys/kernel/debug/f2fs/status includes:
41 - major filesystem information man 39 - major filesystem information managed by f2fs currently
42 - average SIT information about wh 40 - average SIT information about whole segments
43 - current memory footprint consume 41 - current memory footprint consumed by f2fs.
44 42
45 config F2FS_FS_XATTR 43 config F2FS_FS_XATTR
46 bool "F2FS extended attributes" 44 bool "F2FS extended attributes"
47 depends on F2FS_FS 45 depends on F2FS_FS
48 default y 46 default y
49 help 47 help
50 Extended attributes are name:value p 48 Extended attributes are name:value pairs associated with inodes by
51 the kernel or by users (see the attr 49 the kernel or by users (see the attr(5) manual page for details).
52 50
53 If unsure, say N. 51 If unsure, say N.
54 52
55 config F2FS_FS_POSIX_ACL 53 config F2FS_FS_POSIX_ACL
56 bool "F2FS Access Control Lists" 54 bool "F2FS Access Control Lists"
57 depends on F2FS_FS_XATTR 55 depends on F2FS_FS_XATTR
58 select FS_POSIX_ACL 56 select FS_POSIX_ACL
59 default y 57 default y
60 help 58 help
61 Posix Access Control Lists (ACLs) su 59 Posix Access Control Lists (ACLs) support permissions for users and
62 groups beyond the owner/group/world 60 groups beyond the owner/group/world scheme.
63 61
64 If you don't know what Access Contro 62 If you don't know what Access Control Lists are, say N
65 63
66 config F2FS_FS_SECURITY 64 config F2FS_FS_SECURITY
67 bool "F2FS Security Labels" 65 bool "F2FS Security Labels"
68 depends on F2FS_FS_XATTR 66 depends on F2FS_FS_XATTR
69 help 67 help
70 Security labels provide an access co 68 Security labels provide an access control facility to support Linux
71 Security Models (LSMs) accepted by A 69 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
72 Linux. This option enables an extend 70 Linux. This option enables an extended attribute handler for file
73 security labels in the f2fs filesyst 71 security labels in the f2fs filesystem, so that it requires enabling
74 the extended attribute support in ad 72 the extended attribute support in advance. In particular you need this
75 option if you use the setcap command 73 option if you use the setcap command to assign initial process capabi-
76 lities to executables (the security. 74 lities to executables (the security.* extended attributes).
77 75
78 If you are not using a security modu 76 If you are not using a security module, say N.
79 77
80 config F2FS_CHECK_FS 78 config F2FS_CHECK_FS
81 bool "F2FS consistency checking featur 79 bool "F2FS consistency checking feature"
82 depends on F2FS_FS 80 depends on F2FS_FS
83 help 81 help
84 Enables BUG_ONs which check the file 82 Enables BUG_ONs which check the filesystem consistency in runtime.
85 83
86 If you want to improve the performan 84 If you want to improve the performance, say N.
87 85
88 config F2FS_FAULT_INJECTION 86 config F2FS_FAULT_INJECTION
89 bool "F2FS fault injection facility" 87 bool "F2FS fault injection facility"
90 depends on F2FS_FS 88 depends on F2FS_FS
91 help 89 help
92 Test F2FS to inject faults such as E 90 Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on.
93 91
94 If unsure, say N. 92 If unsure, say N.
95 93
96 config F2FS_FS_COMPRESSION 94 config F2FS_FS_COMPRESSION
97 bool "F2FS compression feature" 95 bool "F2FS compression feature"
98 depends on F2FS_FS 96 depends on F2FS_FS
99 help 97 help
100 Enable filesystem-level compression 98 Enable filesystem-level compression on f2fs regular files,
101 multiple back-end compression algori 99 multiple back-end compression algorithms are supported.
102 100
103 config F2FS_FS_LZO 101 config F2FS_FS_LZO
104 bool "LZO compression support" 102 bool "LZO compression support"
105 depends on F2FS_FS_COMPRESSION 103 depends on F2FS_FS_COMPRESSION
106 default y 104 default y
107 help 105 help
108 Support LZO compress algorithm, if u 106 Support LZO compress algorithm, if unsure, say Y.
109 107
110 config F2FS_FS_LZORLE 108 config F2FS_FS_LZORLE
111 bool "LZO-RLE compression support" 109 bool "LZO-RLE compression support"
112 depends on F2FS_FS_LZO 110 depends on F2FS_FS_LZO
113 default y 111 default y
114 help 112 help
115 Support LZO-RLE compress algorithm, 113 Support LZO-RLE compress algorithm, if unsure, say Y.
116 114
117 config F2FS_FS_LZ4 115 config F2FS_FS_LZ4
118 bool "LZ4 compression support" 116 bool "LZ4 compression support"
119 depends on F2FS_FS_COMPRESSION 117 depends on F2FS_FS_COMPRESSION
120 default y 118 default y
121 help 119 help
122 Support LZ4 compress algorithm, if u 120 Support LZ4 compress algorithm, if unsure, say Y.
123 121
124 config F2FS_FS_LZ4HC 122 config F2FS_FS_LZ4HC
125 bool "LZ4HC compression support" 123 bool "LZ4HC compression support"
126 depends on F2FS_FS_LZ4 124 depends on F2FS_FS_LZ4
127 default y 125 default y
128 help 126 help
129 Support LZ4HC compress algorithm, LZ 127 Support LZ4HC compress algorithm, LZ4HC has compatible on-disk
130 layout with LZ4, if unsure, say Y. 128 layout with LZ4, if unsure, say Y.
131 129
132 config F2FS_FS_ZSTD 130 config F2FS_FS_ZSTD
133 bool "ZSTD compression support" 131 bool "ZSTD compression support"
134 depends on F2FS_FS_COMPRESSION 132 depends on F2FS_FS_COMPRESSION
135 default y 133 default y
136 help 134 help
137 Support ZSTD compress algorithm, if 135 Support ZSTD compress algorithm, if unsure, say Y.
138 136
139 config F2FS_IOSTAT 137 config F2FS_IOSTAT
140 bool "F2FS IO statistics information" 138 bool "F2FS IO statistics information"
141 depends on F2FS_FS 139 depends on F2FS_FS
142 default y 140 default y
143 help 141 help
144 Support getting IO statistics throug 142 Support getting IO statistics through sysfs and printing out periodic
145 IO statistics tracepoint events. You 143 IO statistics tracepoint events. You have to turn on "iostat_enable"
146 sysfs node to enable this feature. 144 sysfs node to enable this feature.
147 <<
148 config F2FS_UNFAIR_RWSEM <<
149 bool "F2FS unfair rw_semaphore" <<
150 depends on F2FS_FS && BLK_CGROUP <<
151 help <<
152 Use unfair rw_semaphore, if system c <<
153 cgroup. <<
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.