| Jaegeuk Kim | a14d5393 | 2012-11-02 17:25:27 +0900 | [diff] [blame] | 1 | config F2FS_FS |
| Jaegeuk Kim | d7196c5 | 2015-03-03 17:06:55 -0800 | [diff] [blame] | 2 | tristate "F2FS filesystem support" |
| Jaegeuk Kim | 573ea5f | 2012-11-30 17:32:08 +0900 | [diff] [blame] | 3 | depends on BLOCK |
| Keith Mok | 43b6573 | 2016-03-02 12:04:24 -0800 | [diff] [blame] | 4 | select CRYPTO |
| 5 | select CRYPTO_CRC32 |
| Jaegeuk Kim | a14d5393 | 2012-11-02 17:25:27 +0900 | [diff] [blame] | 6 | help |
| 7 | F2FS is based on Log-structured File System (LFS), which supports |
| 8 | versatile "flash-friendly" features. The design has been focused on |
| 9 | addressing the fundamental issues in LFS, which are snowball effect |
| 10 | of wandering tree and high cleaning overhead. |
| 11 | |
| 12 | Since flash-based storages show different characteristics according to |
| 13 | the internal geometry or flash memory management schemes aka FTL, F2FS |
| 14 | and tools support various parameters not only for configuring on-disk |
| 15 | layout, but also for selecting allocation and cleaning algorithms. |
| 16 | |
| 17 | If unsure, say N. |
| 18 | |
| 19 | config F2FS_STAT_FS |
| 20 | bool "F2FS Status Information" |
| 21 | depends on F2FS_FS && DEBUG_FS |
| 22 | default y |
| 23 | help |
| 24 | /sys/kernel/debug/f2fs/ contains information about all the partitions |
| 25 | mounted as f2fs. Each file shows the whole f2fs information. |
| 26 | |
| 27 | /sys/kernel/debug/f2fs/status includes: |
| arter97 | e1c4204 | 2014-08-06 23:22:50 +0900 | [diff] [blame] | 28 | - major filesystem information managed by f2fs currently |
| Jaegeuk Kim | a14d5393 | 2012-11-02 17:25:27 +0900 | [diff] [blame] | 29 | - average SIT information about whole segments |
| 30 | - current memory footprint consumed by f2fs. |
| 31 | |
| 32 | config F2FS_FS_XATTR |
| 33 | bool "F2FS extended attributes" |
| 34 | depends on F2FS_FS |
| 35 | default y |
| 36 | help |
| 37 | Extended attributes are name:value pairs associated with inodes by |
| 38 | the kernel or by users (see the attr(5) manual page, or visit |
| 39 | <http://acl.bestbits.at/> for details). |
| 40 | |
| 41 | If unsure, say N. |
| 42 | |
| 43 | config F2FS_FS_POSIX_ACL |
| 44 | bool "F2FS Access Control Lists" |
| 45 | depends on F2FS_FS_XATTR |
| 46 | select FS_POSIX_ACL |
| 47 | default y |
| 48 | help |
| 49 | Posix Access Control Lists (ACLs) support permissions for users and |
| Junesung Lee | 217940d | 2015-08-18 22:42:15 +0900 | [diff] [blame] | 50 | groups beyond the owner/group/world scheme. |
| Jaegeuk Kim | a14d5393 | 2012-11-02 17:25:27 +0900 | [diff] [blame] | 51 | |
| 52 | To learn more about Access Control Lists, visit the POSIX ACLs for |
| 53 | Linux website <http://acl.bestbits.at/>. |
| 54 | |
| 55 | If you don't know what Access Control Lists are, say N |
| Jaegeuk Kim | 8ae8f16 | 2013-06-03 19:46:19 +0900 | [diff] [blame] | 56 | |
| 57 | config F2FS_FS_SECURITY |
| 58 | bool "F2FS Security Labels" |
| 59 | depends on F2FS_FS_XATTR |
| 60 | help |
| 61 | Security labels provide an access control facility to support Linux |
| 62 | Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO |
| 63 | Linux. This option enables an extended attribute handler for file |
| 64 | security labels in the f2fs filesystem, so that it requires enabling |
| 65 | the extended attribute support in advance. |
| 66 | |
| 67 | If you are not using a security module, say N. |
| Jaegeuk Kim | 3b218e3 | 2013-10-29 15:43:01 +0900 | [diff] [blame] | 68 | |
| 69 | config F2FS_CHECK_FS |
| 70 | bool "F2FS consistency checking feature" |
| 71 | depends on F2FS_FS |
| 72 | help |
| arter97 | e1c4204 | 2014-08-06 23:22:50 +0900 | [diff] [blame] | 73 | Enables BUG_ONs which check the filesystem consistency in runtime. |
| Jaegeuk Kim | 3b218e3 | 2013-10-29 15:43:01 +0900 | [diff] [blame] | 74 | |
| 75 | If you want to improve the performance, say N. |
| Jaegeuk Kim | 63f92dd | 2014-12-17 19:45:05 -0800 | [diff] [blame] | 76 | |
| Jaegeuk Kim | d33793f | 2015-04-10 16:28:26 -0700 | [diff] [blame] | 77 | config F2FS_FS_ENCRYPTION |
| 78 | bool "F2FS Encryption" |
| 79 | depends on F2FS_FS |
| 80 | depends on F2FS_FS_XATTR |
| Jaegeuk Kim | 0b81d07 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 81 | select FS_ENCRYPTION |
| Jaegeuk Kim | d33793f | 2015-04-10 16:28:26 -0700 | [diff] [blame] | 82 | help |
| 83 | Enable encryption of f2fs files and directories. This |
| 84 | feature is similar to ecryptfs, but it is more memory |
| 85 | efficient since it avoids caching the encrypted and |
| 86 | decrypted pages in the page cache. |
| 87 | |
| Jaegeuk Kim | 63f92dd | 2014-12-17 19:45:05 -0800 | [diff] [blame] | 88 | config F2FS_IO_TRACE |
| 89 | bool "F2FS IO tracer" |
| 90 | depends on F2FS_FS |
| 91 | depends on FUNCTION_TRACER |
| 92 | help |
| 93 | F2FS IO trace is based on a function trace, which gathers process |
| 94 | information and block IO patterns in the filesystem level. |
| 95 | |
| 96 | If unsure, say N. |
| Jaegeuk Kim | 73faec4 | 2016-04-29 15:34:32 -0700 | [diff] [blame] | 97 | |
| 98 | config F2FS_FAULT_INJECTION |
| 99 | bool "F2FS fault injection facility" |
| 100 | depends on F2FS_FS |
| 101 | help |
| 102 | Test F2FS to inject faults such as ENOMEM, ENOSPC, and so on. |
| 103 | |
| 104 | If unsure, say N. |