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