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Jaegeuk Kima14d53932012-11-02 17:25:27 +09001config F2FS_FS
Jaegeuk Kimd7196c52015-03-03 17:06:55 -08002 tristate "F2FS filesystem support"
Jaegeuk Kim573ea5f2012-11-30 17:32:08 +09003 depends on BLOCK
Jaegeuk Kima14d53932012-11-02 17:25:27 +09004 help
5 F2FS is based on Log-structured File System (LFS), which supports
6 versatile "flash-friendly" features. The design has been focused on
7 addressing the fundamental issues in LFS, which are snowball effect
8 of wandering tree and high cleaning overhead.
9
10 Since flash-based storages show different characteristics according to
11 the internal geometry or flash memory management schemes aka FTL, F2FS
12 and tools support various parameters not only for configuring on-disk
13 layout, but also for selecting allocation and cleaning algorithms.
14
15 If unsure, say N.
16
17config F2FS_STAT_FS
18 bool "F2FS Status Information"
19 depends on F2FS_FS && DEBUG_FS
20 default y
21 help
22 /sys/kernel/debug/f2fs/ contains information about all the partitions
23 mounted as f2fs. Each file shows the whole f2fs information.
24
25 /sys/kernel/debug/f2fs/status includes:
arter97e1c42042014-08-06 23:22:50 +090026 - major filesystem information managed by f2fs currently
Jaegeuk Kima14d53932012-11-02 17:25:27 +090027 - average SIT information about whole segments
28 - current memory footprint consumed by f2fs.
29
30config F2FS_FS_XATTR
31 bool "F2FS extended attributes"
32 depends on F2FS_FS
33 default y
34 help
35 Extended attributes are name:value pairs associated with inodes by
36 the kernel or by users (see the attr(5) manual page, or visit
37 <http://acl.bestbits.at/> for details).
38
39 If unsure, say N.
40
41config F2FS_FS_POSIX_ACL
42 bool "F2FS Access Control Lists"
43 depends on F2FS_FS_XATTR
44 select FS_POSIX_ACL
45 default y
46 help
47 Posix Access Control Lists (ACLs) support permissions for users and
Junesung Lee217940d2015-08-18 22:42:15 +090048 groups beyond the owner/group/world scheme.
Jaegeuk Kima14d53932012-11-02 17:25:27 +090049
50 To learn more about Access Control Lists, visit the POSIX ACLs for
51 Linux website <http://acl.bestbits.at/>.
52
53 If you don't know what Access Control Lists are, say N
Jaegeuk Kim8ae8f162013-06-03 19:46:19 +090054
55config F2FS_FS_SECURITY
56 bool "F2FS Security Labels"
57 depends on F2FS_FS_XATTR
58 help
59 Security labels provide an access control facility to support Linux
60 Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
61 Linux. This option enables an extended attribute handler for file
62 security labels in the f2fs filesystem, so that it requires enabling
63 the extended attribute support in advance.
64
65 If you are not using a security module, say N.
Jaegeuk Kim3b218e32013-10-29 15:43:01 +090066
67config F2FS_CHECK_FS
68 bool "F2FS consistency checking feature"
69 depends on F2FS_FS
70 help
arter97e1c42042014-08-06 23:22:50 +090071 Enables BUG_ONs which check the filesystem consistency in runtime.
Jaegeuk Kim3b218e32013-10-29 15:43:01 +090072
73 If you want to improve the performance, say N.
Jaegeuk Kim63f92dd2014-12-17 19:45:05 -080074
Jaegeuk Kimd33793f2015-04-10 16:28:26 -070075config F2FS_FS_ENCRYPTION
76 bool "F2FS Encryption"
77 depends on F2FS_FS
78 depends on F2FS_FS_XATTR
79 select CRYPTO_AES
80 select CRYPTO_CBC
81 select CRYPTO_ECB
82 select CRYPTO_XTS
83 select CRYPTO_CTS
84 select CRYPTO_CTR
85 select CRYPTO_SHA256
86 select KEYS
87 select ENCRYPTED_KEYS
88 help
89 Enable encryption of f2fs files and directories. This
90 feature is similar to ecryptfs, but it is more memory
91 efficient since it avoids caching the encrypted and
92 decrypted pages in the page cache.
93
Jaegeuk Kim63f92dd2014-12-17 19:45:05 -080094config F2FS_IO_TRACE
95 bool "F2FS IO tracer"
96 depends on F2FS_FS
97 depends on FUNCTION_TRACER
98 help
99 F2FS IO trace is based on a function trace, which gathers process
100 information and block IO patterns in the filesystem level.
101
102 If unsure, say N.