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