| David Sterba | 852eb3a | 2018-04-03 19:23:33 +0200 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | |
| Alexey Dobriyan | 335debe | 2009-01-22 10:27:30 +0300 | [diff] [blame] | 3 | config BTRFS_FS |
| David Sterba | aa825914 | 2013-03-19 11:50:59 +0000 | [diff] [blame] | 4 | tristate "Btrfs filesystem support" |
| Nikolay Borisov | 9678c54 | 2018-01-08 11:45:05 +0200 | [diff] [blame] | 5 | select LIBCRC32C |
| Alexey Dobriyan | 335debe | 2009-01-22 10:27:30 +0300 | [diff] [blame] | 6 | select ZLIB_INFLATE |
| 7 | select ZLIB_DEFLATE |
| Li Zefan | a6fa6fa | 2010-10-25 15:12:26 +0800 | [diff] [blame] | 8 | select LZO_COMPRESS |
| 9 | select LZO_DECOMPRESS |
| Nick Terrell | 5c1aab1 | 2017-08-09 19:39:02 -0700 | [diff] [blame] | 10 | select ZSTD_COMPRESS |
| 11 | select ZSTD_DECOMPRESS |
| David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 12 | select RAID6_PQ |
| Tomasz Torcz | 10e78e3 | 2013-02-05 09:38:53 -0500 | [diff] [blame] | 13 | select XOR_BLOCKS |
| Pranith Kumar | 83fe27e | 2014-12-05 11:24:45 -0500 | [diff] [blame] | 14 | select SRCU |
| David Woodhouse | 53b381b | 2013-01-29 18:40:14 -0500 | [diff] [blame] | 15 | |
| Alexey Dobriyan | 335debe | 2009-01-22 10:27:30 +0300 | [diff] [blame] | 16 | help |
| David Sterba | 4204617 | 2013-11-20 14:32:34 +0100 | [diff] [blame] | 17 | Btrfs is a general purpose copy-on-write filesystem with extents, |
| 18 | writable snapshotting, support for multiple devices and many more |
| 19 | features focused on fault tolerance, repair and easy administration. |
| Alexey Dobriyan | 335debe | 2009-01-22 10:27:30 +0300 | [diff] [blame] | 20 | |
| David Sterba | 4204617 | 2013-11-20 14:32:34 +0100 | [diff] [blame] | 21 | The filesystem disk format is no longer unstable, and it's not |
| 22 | expected to change unless there are strong reasons to do so. If there |
| 23 | is a format change, file systems with a unchanged format will |
| 24 | continue to be mountable and usable by newer kernels. |
| 25 | |
| 26 | For more information, please see the web pages at |
| 27 | http://btrfs.wiki.kernel.org. |
| Alexey Dobriyan | 335debe | 2009-01-22 10:27:30 +0300 | [diff] [blame] | 28 | |
| 29 | To compile this file system support as a module, choose M here. The |
| 30 | module will be called btrfs. |
| 31 | |
| 32 | If unsure, say N. |
| Christian Hesse | bef62ef | 2009-02-04 09:28:28 -0500 | [diff] [blame] | 33 | |
| 34 | config BTRFS_FS_POSIX_ACL |
| 35 | bool "Btrfs POSIX Access Control Lists" |
| 36 | depends on BTRFS_FS |
| 37 | select FS_POSIX_ACL |
| 38 | help |
| 39 | POSIX Access Control Lists (ACLs) support permissions for users and |
| 40 | groups beyond the owner/group/world scheme. |
| 41 | |
| Christian Hesse | bef62ef | 2009-02-04 09:28:28 -0500 | [diff] [blame] | 42 | If you don't know what Access Control Lists are, say N |
| Stefan Behrens | c975dd4 | 2011-11-01 17:06:04 +0100 | [diff] [blame] | 43 | |
| 44 | config BTRFS_FS_CHECK_INTEGRITY |
| 45 | bool "Btrfs with integrity check tool compiled in (DANGEROUS)" |
| 46 | depends on BTRFS_FS |
| 47 | help |
| 48 | Adds code that examines all block write requests (including |
| 49 | writes of the super block). The goal is to verify that the |
| 50 | state of the filesystem on disk is always consistent, i.e., |
| 51 | after a power-loss or kernel panic event the filesystem is |
| 52 | in a consistent state. |
| 53 | |
| 54 | If the integrity check tool is included and activated in |
| 55 | the mount options, plenty of kernel memory is used, and |
| 56 | plenty of additional CPU cycles are spent. Enabling this |
| 57 | functionality is not intended for normal use. |
| 58 | |
| 59 | In most cases, unless you are a btrfs developer who needs |
| 60 | to verify the integrity of (super)-block write requests |
| 61 | during the run of a regression test, say N |
| Josef Bacik | 74255aa | 2013-03-15 09:47:08 -0400 | [diff] [blame] | 62 | |
| 63 | config BTRFS_FS_RUN_SANITY_TESTS |
| 64 | bool "Btrfs will run sanity tests upon loading" |
| 65 | depends on BTRFS_FS |
| 66 | help |
| 67 | This will run some basic sanity tests on the free space cache |
| 68 | code to make sure it is acting as it should. These are mostly |
| Michael Witten | a26a874 | 2013-08-14 09:59:45 +0000 | [diff] [blame] | 69 | regression tests and are only really interesting to btrfs |
| 70 | developers. |
| Josef Bacik | 74255aa | 2013-03-15 09:47:08 -0400 | [diff] [blame] | 71 | |
| 72 | If unsure, say N. |
| 73 | |
| Eric Sandeen | 6d49ba1 | 2013-04-22 16:12:31 +0000 | [diff] [blame] | 74 | config BTRFS_DEBUG |
| 75 | bool "Btrfs debugging support" |
| 76 | depends on BTRFS_FS |
| 77 | help |
| 78 | Enable run-time debugging support for the btrfs filesystem. This may |
| 79 | enable additional and expensive checks with negative impact on |
| 80 | performance, or export extra information via sysfs. |
| 81 | |
| 82 | If unsure, say N. |
| Josef Bacik | 2e17c7c6 | 2013-08-26 16:53:15 -0400 | [diff] [blame] | 83 | |
| 84 | config BTRFS_ASSERT |
| 85 | bool "Btrfs assert support" |
| 86 | depends on BTRFS_FS |
| 87 | help |
| 88 | Enable run-time assertion checking. This will result in panics if |
| 89 | any of the assertions trip. This is meant for btrfs developers only. |
| 90 | |
| 91 | If unsure, say N. |
| Josef Bacik | fd708b8 | 2017-09-29 15:43:50 -0400 | [diff] [blame] | 92 | |
| 93 | config BTRFS_FS_REF_VERIFY |
| 94 | bool "Btrfs with the ref verify tool compiled in" |
| 95 | depends on BTRFS_FS |
| 96 | default n |
| 97 | help |
| 98 | Enable run-time extent reference verification instrumentation. This |
| 99 | is meant to be used by btrfs developers for tracking down extent |
| 100 | reference problems or verifying they didn't break something. |
| 101 | |
| 102 | If unsure, say N. |