projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 335debee | 1 | config BTRFS_FS |
| aa825914 | 2 | tristate "Btrfs filesystem support" |
| 14a958e6 FDBM |
3 | select CRYPTO |
| 4 | select CRYPTO_CRC32C | |
| 335debee AD |
5 | select ZLIB_INFLATE |
| 6 | select ZLIB_DEFLATE | |
| a6fa6fae LZ |
7 | select LZO_COMPRESS |
| 8 | select LZO_DECOMPRESS | |
| 53b381b3 | 9 | select RAID6_PQ |
| 10e78e3a | 10 | select XOR_BLOCKS |
| 53b381b3 | 11 | |
| 335debee | 12 | help |
| 4204617d DS |
13 | Btrfs is a general purpose copy-on-write filesystem with extents, |
| 14 | writable snapshotting, support for multiple devices and many more | |
| 15 | features focused on fault tolerance, repair and easy administration. | |
| 335debee | 16 | |
| 4204617d DS |
17 | The filesystem disk format is no longer unstable, and it's not |
| 18 | expected to change unless there are strong reasons to do so. If there | |
| 19 | is a format change, file systems with a unchanged format will | |
| 20 | continue to be mountable and usable by newer kernels. | |
| 21 | ||
| 22 | For more information, please see the web pages at | |
| 23 | http://btrfs.wiki.kernel.org. | |
| 335debee AD |
24 | |
| 25 | To compile this file system support as a module, choose M here. The | |
| 26 | module will be called btrfs. | |
| 27 | ||
| 28 | If unsure, say N. | |
| bef62ef3 CH |
29 | |
| 30 | config BTRFS_FS_POSIX_ACL | |
| 31 | bool "Btrfs POSIX Access Control Lists" | |
| 32 | depends on BTRFS_FS | |
| 33 | select FS_POSIX_ACL | |
| 34 | help | |
| 35 | POSIX Access Control Lists (ACLs) support permissions for users and | |
| 36 | groups beyond the owner/group/world scheme. | |
| 37 | ||
| 38 | To learn more about Access Control Lists, visit the POSIX ACLs for | |
| 39 | Linux website <http://acl.bestbits.at/>. | |
| 40 | ||
| 41 | If you don't know what Access Control Lists are, say N | |
| c975dd46 SB |
42 | |
| 43 | config BTRFS_FS_CHECK_INTEGRITY | |
| 44 | bool "Btrfs with integrity check tool compiled in (DANGEROUS)" | |
| 45 | depends on BTRFS_FS | |
| 46 | help | |
| 47 | Adds code that examines all block write requests (including | |
| 48 | writes of the super block). The goal is to verify that the | |
| 49 | state of the filesystem on disk is always consistent, i.e., | |
| 50 | after a power-loss or kernel panic event the filesystem is | |
| 51 | in a consistent state. | |
| 52 | ||
| 53 | If the integrity check tool is included and activated in | |
| 54 | the mount options, plenty of kernel memory is used, and | |
| 55 | plenty of additional CPU cycles are spent. Enabling this | |
| 56 | functionality is not intended for normal use. | |
| 57 | ||
| 58 | In most cases, unless you are a btrfs developer who needs | |
| 59 | to verify the integrity of (super)-block write requests | |
| 60 | during the run of a regression test, say N | |
| 74255aa0 JB |
61 | |
| 62 | config BTRFS_FS_RUN_SANITY_TESTS | |
| 63 | bool "Btrfs will run sanity tests upon loading" | |
| 64 | depends on BTRFS_FS | |
| 65 | help | |
| 66 | This will run some basic sanity tests on the free space cache | |
| 67 | code to make sure it is acting as it should. These are mostly | |
| a26a8746 MW |
68 | regression tests and are only really interesting to btrfs |
| 69 | developers. | |
| 74255aa0 JB |
70 | |
| 71 | If unsure, say N. | |
| 72 | ||
| 6d49ba1b ES |
73 | config BTRFS_DEBUG |
| 74 | bool "Btrfs debugging support" | |
| 75 | depends on BTRFS_FS | |
| 76 | help | |
| 77 | Enable run-time debugging support for the btrfs filesystem. This may | |
| 78 | enable additional and expensive checks with negative impact on | |
| 79 | performance, or export extra information via sysfs. | |
| 80 | ||
| 81 | If unsure, say N. | |
| 2e17c7c6 JB |
82 | |
| 83 | config BTRFS_ASSERT | |
| 84 | bool "Btrfs assert support" | |
| 85 | depends on BTRFS_FS | |
| 86 | help | |
| 87 | Enable run-time assertion checking. This will result in panics if | |
| 88 | any of the assertions trip. This is meant for btrfs developers only. | |
| 89 | ||
| 90 | If unsure, say N. |