blob: 575636f6491ef6d887180f9fc3c36740d410083c [file] [log] [blame]
David Sterba852eb3a2018-04-03 19:23:33 +02001# SPDX-License-Identifier: GPL-2.0
2
Alexey Dobriyan335debe2009-01-22 10:27:30 +03003config BTRFS_FS
David Sterbaaa8259142013-03-19 11:50:59 +00004 tristate "Btrfs filesystem support"
Johannes Thumshirnd5178572019-06-03 16:58:57 +02005 select CRYPTO
6 select CRYPTO_CRC32C
YueHaibing314c4cd2019-07-02 22:39:03 +08007 select LIBCRC32C
Johannes Thumshirn3951e7f2019-10-07 11:11:01 +02008 select CRYPTO_XXHASH
Johannes Thumshirn3831bf02019-10-07 11:11:02 +02009 select CRYPTO_SHA256
David Sterba78f926f2019-11-28 13:02:32 +010010 select CRYPTO_BLAKE2B
Alexey Dobriyan335debe2009-01-22 10:27:30 +030011 select ZLIB_INFLATE
12 select ZLIB_DEFLATE
Li Zefana6fa6fa2010-10-25 15:12:26 +080013 select LZO_COMPRESS
14 select LZO_DECOMPRESS
Nick Terrell5c1aab12017-08-09 19:39:02 -070015 select ZSTD_COMPRESS
16 select ZSTD_DECOMPRESS
David Woodhouse53b381b2013-01-29 18:40:14 -050017 select RAID6_PQ
Tomasz Torcz10e78e32013-02-05 09:38:53 -050018 select XOR_BLOCKS
Pranith Kumar83fe27e2014-12-05 11:24:45 -050019 select SRCU
David Woodhouse53b381b2013-01-29 18:40:14 -050020
Alexey Dobriyan335debe2009-01-22 10:27:30 +030021 help
David Sterba42046172013-11-20 14:32:34 +010022 Btrfs is a general purpose copy-on-write filesystem with extents,
23 writable snapshotting, support for multiple devices and many more
24 features focused on fault tolerance, repair and easy administration.
Alexey Dobriyan335debe2009-01-22 10:27:30 +030025
David Sterba42046172013-11-20 14:32:34 +010026 The filesystem disk format is no longer unstable, and it's not
27 expected to change unless there are strong reasons to do so. If there
28 is a format change, file systems with a unchanged format will
29 continue to be mountable and usable by newer kernels.
30
31 For more information, please see the web pages at
32 http://btrfs.wiki.kernel.org.
Alexey Dobriyan335debe2009-01-22 10:27:30 +030033
34 To compile this file system support as a module, choose M here. The
35 module will be called btrfs.
36
37 If unsure, say N.
Christian Hessebef62ef2009-02-04 09:28:28 -050038
39config BTRFS_FS_POSIX_ACL
40 bool "Btrfs POSIX Access Control Lists"
41 depends on BTRFS_FS
42 select FS_POSIX_ACL
43 help
44 POSIX Access Control Lists (ACLs) support permissions for users and
45 groups beyond the owner/group/world scheme.
46
Christian Hessebef62ef2009-02-04 09:28:28 -050047 If you don't know what Access Control Lists are, say N
Stefan Behrensc975dd42011-11-01 17:06:04 +010048
49config BTRFS_FS_CHECK_INTEGRITY
50 bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
51 depends on BTRFS_FS
52 help
53 Adds code that examines all block write requests (including
54 writes of the super block). The goal is to verify that the
55 state of the filesystem on disk is always consistent, i.e.,
56 after a power-loss or kernel panic event the filesystem is
57 in a consistent state.
58
59 If the integrity check tool is included and activated in
60 the mount options, plenty of kernel memory is used, and
61 plenty of additional CPU cycles are spent. Enabling this
62 functionality is not intended for normal use.
63
64 In most cases, unless you are a btrfs developer who needs
65 to verify the integrity of (super)-block write requests
66 during the run of a regression test, say N
Josef Bacik74255aa2013-03-15 09:47:08 -040067
68config BTRFS_FS_RUN_SANITY_TESTS
69 bool "Btrfs will run sanity tests upon loading"
70 depends on BTRFS_FS
71 help
72 This will run some basic sanity tests on the free space cache
73 code to make sure it is acting as it should. These are mostly
Michael Wittena26a8742013-08-14 09:59:45 +000074 regression tests and are only really interesting to btrfs
75 developers.
Josef Bacik74255aa2013-03-15 09:47:08 -040076
77 If unsure, say N.
78
Eric Sandeen6d49ba12013-04-22 16:12:31 +000079config BTRFS_DEBUG
80 bool "Btrfs debugging support"
81 depends on BTRFS_FS
82 help
83 Enable run-time debugging support for the btrfs filesystem. This may
84 enable additional and expensive checks with negative impact on
85 performance, or export extra information via sysfs.
86
87 If unsure, say N.
Josef Bacik2e17c7c62013-08-26 16:53:15 -040088
89config BTRFS_ASSERT
90 bool "Btrfs assert support"
91 depends on BTRFS_FS
92 help
93 Enable run-time assertion checking. This will result in panics if
94 any of the assertions trip. This is meant for btrfs developers only.
95
96 If unsure, say N.
Josef Bacikfd708b82017-09-29 15:43:50 -040097
98config BTRFS_FS_REF_VERIFY
99 bool "Btrfs with the ref verify tool compiled in"
100 depends on BTRFS_FS
101 default n
102 help
103 Enable run-time extent reference verification instrumentation. This
104 is meant to be used by btrfs developers for tracking down extent
105 reference problems or verifying they didn't break something.
106
107 If unsure, say N.