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 <<
11 select FS_IOMAP <<
12 select LZ4_COMPRESS if F2FS_FS_LZ4 <<
13 select LZ4_DECOMPRESS if F2FS_FS_LZ4 <<
14 select LZ4HC_COMPRESS if F2FS_FS_LZ4HC <<
15 select LZO_COMPRESS if F2FS_FS_LZO <<
16 select LZO_DECOMPRESS if F2FS_FS_LZO <<
17 select ZSTD_COMPRESS if F2FS_FS_ZSTD <<
18 select ZSTD_DECOMPRESS if F2FS_FS_ZSTD <<
19 help 9 help
20 F2FS is based on Log-structured File 10 F2FS is based on Log-structured File System (LFS), which supports
21 versatile "flash-friendly" features. 11 versatile "flash-friendly" features. The design has been focused on
22 addressing the fundamental issues in 12 addressing the fundamental issues in LFS, which are snowball effect
23 of wandering tree and high cleaning 13 of wandering tree and high cleaning overhead.
24 14
25 Since flash-based storages show diff 15 Since flash-based storages show different characteristics according to
26 the internal geometry or flash memor 16 the internal geometry or flash memory management schemes aka FTL, F2FS
27 and tools support various parameters 17 and tools support various parameters not only for configuring on-disk
28 layout, but also for selecting alloc 18 layout, but also for selecting allocation and cleaning algorithms.
29 19
30 If unsure, say N. 20 If unsure, say N.
31 21
32 config F2FS_STAT_FS 22 config F2FS_STAT_FS
33 bool "F2FS Status Information" 23 bool "F2FS Status Information"
34 depends on F2FS_FS !! 24 depends on F2FS_FS && DEBUG_FS
35 default y 25 default y
36 help 26 help
37 /sys/kernel/debug/f2fs/ contains inf 27 /sys/kernel/debug/f2fs/ contains information about all the partitions
38 mounted as f2fs. Each file shows the 28 mounted as f2fs. Each file shows the whole f2fs information.
39 29
40 /sys/kernel/debug/f2fs/status includ 30 /sys/kernel/debug/f2fs/status includes:
41 - major filesystem information man 31 - major filesystem information managed by f2fs currently
42 - average SIT information about wh 32 - average SIT information about whole segments
43 - current memory footprint consume 33 - current memory footprint consumed by f2fs.
44 34
45 config F2FS_FS_XATTR 35 config F2FS_FS_XATTR
46 bool "F2FS extended attributes" 36 bool "F2FS extended attributes"
47 depends on F2FS_FS 37 depends on F2FS_FS
48 default y 38 default y
49 help 39 help
50 Extended attributes are name:value p 40 Extended attributes are name:value pairs associated with inodes by
51 the kernel or by users (see the attr 41 the kernel or by users (see the attr(5) manual page for details).
52 42
53 If unsure, say N. 43 If unsure, say N.
54 44
55 config F2FS_FS_POSIX_ACL 45 config F2FS_FS_POSIX_ACL
56 bool "F2FS Access Control Lists" 46 bool "F2FS Access Control Lists"
57 depends on F2FS_FS_XATTR 47 depends on F2FS_FS_XATTR
58 select FS_POSIX_ACL 48 select FS_POSIX_ACL
59 default y 49 default y
60 help 50 help
61 Posix Access Control Lists (ACLs) su 51 Posix Access Control Lists (ACLs) support permissions for users and
62 groups beyond the owner/group/world 52 groups beyond the owner/group/world scheme.
63 53
64 If you don't know what Access Contro 54 If you don't know what Access Control Lists are, say N
65 55
66 config F2FS_FS_SECURITY 56 config F2FS_FS_SECURITY
67 bool "F2FS Security Labels" 57 bool "F2FS Security Labels"
68 depends on F2FS_FS_XATTR 58 depends on F2FS_FS_XATTR
69 help 59 help
70 Security labels provide an access co 60 Security labels provide an access control facility to support Linux
71 Security Models (LSMs) accepted by A 61 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
72 Linux. This option enables an extend 62 Linux. This option enables an extended attribute handler for file
73 security labels in the f2fs filesyst 63 security labels in the f2fs filesystem, so that it requires enabling
74 the extended attribute support in ad 64 the extended attribute support in advance. In particular you need this
75 option if you use the setcap command 65 option if you use the setcap command to assign initial process capabi-
76 lities to executables (the security. 66 lities to executables (the security.* extended attributes).
77 67
78 If you are not using a security modu 68 If you are not using a security module, say N.
79 69
80 config F2FS_CHECK_FS 70 config F2FS_CHECK_FS
81 bool "F2FS consistency checking featur 71 bool "F2FS consistency checking feature"
82 depends on F2FS_FS 72 depends on F2FS_FS
83 help 73 help
84 Enables BUG_ONs which check the file 74 Enables BUG_ONs which check the filesystem consistency in runtime.
85 75
86 If you want to improve the performan 76 If you want to improve the performance, say N.
87 77
88 config F2FS_FAULT_INJECTION !! 78 config F2FS_IO_TRACE
89 bool "F2FS fault injection facility" !! 79 bool "F2FS IO tracer"
90 depends on F2FS_FS 80 depends on F2FS_FS
>> 81 depends on FUNCTION_TRACER
91 help 82 help
92 Test F2FS to inject faults such as E !! 83 F2FS IO trace is based on a function trace, which gathers process
>> 84 information and block IO patterns in the filesystem level.
93 85
94 If unsure, say N. 86 If unsure, say N.
95 87
96 config F2FS_FS_COMPRESSION !! 88 config F2FS_FAULT_INJECTION
97 bool "F2FS compression feature" !! 89 bool "F2FS fault injection facility"
98 depends on F2FS_FS 90 depends on F2FS_FS
99 help 91 help
100 Enable filesystem-level compression !! 92 Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on.
101 multiple back-end compression algori <<
102 <<
103 config F2FS_FS_LZO <<
104 bool "LZO compression support" <<
105 depends on F2FS_FS_COMPRESSION <<
106 default y <<
107 help <<
108 Support LZO compress algorithm, if u <<
109 <<
110 config F2FS_FS_LZORLE <<
111 bool "LZO-RLE compression support" <<
112 depends on F2FS_FS_LZO <<
113 default y <<
114 help <<
115 Support LZO-RLE compress algorithm, <<
116 <<
117 config F2FS_FS_LZ4 <<
118 bool "LZ4 compression support" <<
119 depends on F2FS_FS_COMPRESSION <<
120 default y <<
121 help <<
122 Support LZ4 compress algorithm, if u <<
123 <<
124 config F2FS_FS_LZ4HC <<
125 bool "LZ4HC compression support" <<
126 depends on F2FS_FS_LZ4 <<
127 default y <<
128 help <<
129 Support LZ4HC compress algorithm, LZ <<
130 layout with LZ4, if unsure, say Y. <<
131 <<
132 config F2FS_FS_ZSTD <<
133 bool "ZSTD compression support" <<
134 depends on F2FS_FS_COMPRESSION <<
135 default y <<
136 help <<
137 Support ZSTD compress algorithm, if <<
138 93
139 config F2FS_IOSTAT !! 94 If unsure, say N.
140 bool "F2FS IO statistics information" <<
141 depends on F2FS_FS <<
142 default y <<
143 help <<
144 Support getting IO statistics throug <<
145 IO statistics tracepoint events. You <<
146 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. <<
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