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1# SPDX-License-Identifier: GPL-2.0
2
3config BTRFS_FS
4 tristate "Btrfs filesystem support"
5 select CRYPTO
6 select CRYPTO_CRC32C
7 select LIBCRC32C
8 select CRYPTO_XXHASH
9 select CRYPTO_SHA256
10 select CRYPTO_BLAKE2B
11 select ZLIB_INFLATE
12 select ZLIB_DEFLATE
13 select LZO_COMPRESS
14 select LZO_DECOMPRESS
15 select ZSTD_COMPRESS
16 select ZSTD_DECOMPRESS
17 select FS_IOMAP
18 select RAID6_PQ
19 select XOR_BLOCKS
20 select SRCU
21 depends on PAGE_SIZE_LESS_THAN_256KB
22
23 help
24 Btrfs is a general purpose copy-on-write filesystem with extents,
25 writable snapshotting, support for multiple devices and many more
26 features focused on fault tolerance, repair and easy administration.
27
28 The filesystem disk format is no longer unstable, and it's not
29 expected to change unless there are strong reasons to do so. If there
30 is a format change, file systems with a unchanged format will
31 continue to be mountable and usable by newer kernels.
32
33 For more information, please see the web pages at
34 http://btrfs.wiki.kernel.org.
35
36 To compile this file system support as a module, choose M here. The
37 module will be called btrfs.
38
39 If unsure, say N.
40
41config BTRFS_FS_POSIX_ACL
42 bool "Btrfs POSIX Access Control Lists"
43 depends on BTRFS_FS
44 select FS_POSIX_ACL
45 help
46 POSIX Access Control Lists (ACLs) support permissions for users and
47 groups beyond the owner/group/world scheme.
48
49 If you don't know what Access Control Lists are, say N
50
51config BTRFS_FS_CHECK_INTEGRITY
52 bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
53 depends on BTRFS_FS
54 help
55 Adds code that examines all block write requests (including
56 writes of the super block). The goal is to verify that the
57 state of the filesystem on disk is always consistent, i.e.,
58 after a power-loss or kernel panic event the filesystem is
59 in a consistent state.
60
61 If the integrity check tool is included and activated in
62 the mount options, plenty of kernel memory is used, and
63 plenty of additional CPU cycles are spent. Enabling this
64 functionality is not intended for normal use.
65
66 In most cases, unless you are a btrfs developer who needs
67 to verify the integrity of (super)-block write requests
68 during the run of a regression test, say N
69
70config BTRFS_FS_RUN_SANITY_TESTS
71 bool "Btrfs will run sanity tests upon loading"
72 depends on BTRFS_FS
73 help
74 This will run some basic sanity tests on the free space cache
75 code to make sure it is acting as it should. These are mostly
76 regression tests and are only really interesting to btrfs
77 developers.
78
79 If unsure, say N.
80
81config BTRFS_DEBUG
82 bool "Btrfs debugging support"
83 depends on BTRFS_FS
84 help
85 Enable run-time debugging support for the btrfs filesystem. This may
86 enable additional and expensive checks with negative impact on
87 performance, or export extra information via sysfs.
88
89 If unsure, say N.
90
91config BTRFS_ASSERT
92 bool "Btrfs assert support"
93 depends on BTRFS_FS
94 help
95 Enable run-time assertion checking. This will result in panics if
96 any of the assertions trip. This is meant for btrfs developers only.
97
98 If unsure, say N.
99
100config BTRFS_FS_REF_VERIFY
101 bool "Btrfs with the ref verify tool compiled in"
102 depends on BTRFS_FS
103 default n
104 help
105 Enable run-time extent reference verification instrumentation. This
106 is meant to be used by btrfs developers for tracking down extent
107 reference problems or verifying they didn't break something.
108
109 If unsure, say N.
1# SPDX-License-Identifier: GPL-2.0
2
3config BTRFS_FS
4 tristate "Btrfs filesystem support"
5 select BLK_CGROUP_PUNT_BIO
6 select CRYPTO
7 select CRYPTO_CRC32C
8 select LIBCRC32C
9 select CRYPTO_XXHASH
10 select CRYPTO_SHA256
11 select CRYPTO_BLAKE2B
12 select ZLIB_INFLATE
13 select ZLIB_DEFLATE
14 select LZO_COMPRESS
15 select LZO_DECOMPRESS
16 select ZSTD_COMPRESS
17 select ZSTD_DECOMPRESS
18 select FS_IOMAP
19 select RAID6_PQ
20 select XOR_BLOCKS
21 depends on PAGE_SIZE_LESS_THAN_256KB
22
23 help
24 Btrfs is a general purpose copy-on-write filesystem with extents,
25 writable snapshotting, support for multiple devices and many more
26 features focused on fault tolerance, repair and easy administration.
27
28 The filesystem disk format is no longer unstable, and it's not
29 expected to change unless there are strong reasons to do so. If there
30 is a format change, file systems with a unchanged format will
31 continue to be mountable and usable by newer kernels.
32
33 For more information, please see the web pages at
34 https://btrfs.readthedocs.io
35
36 To compile this file system support as a module, choose M here. The
37 module will be called btrfs.
38
39 If unsure, say N.
40
41config BTRFS_FS_POSIX_ACL
42 bool "Btrfs POSIX Access Control Lists"
43 depends on BTRFS_FS
44 select FS_POSIX_ACL
45 help
46 POSIX Access Control Lists (ACLs) support permissions for users and
47 groups beyond the owner/group/world scheme.
48
49 If you don't know what Access Control Lists are, say N
50
51config BTRFS_FS_RUN_SANITY_TESTS
52 bool "Btrfs will run sanity tests upon loading"
53 depends on BTRFS_FS
54 help
55 This will run some basic sanity tests on the free space cache
56 code to make sure it is acting as it should. These are mostly
57 regression tests and are only really interesting to btrfs
58 developers.
59
60 If unsure, say N.
61
62config BTRFS_DEBUG
63 bool "Btrfs debugging support"
64 depends on BTRFS_FS
65 help
66 Enable run-time debugging support for the btrfs filesystem. This may
67 enable additional and expensive checks with negative impact on
68 performance, or export extra information via sysfs.
69
70 If unsure, say N.
71
72config BTRFS_ASSERT
73 bool "Btrfs assert support"
74 depends on BTRFS_FS
75 help
76 Enable run-time assertion checking. This will result in panics if
77 any of the assertions trip. This is meant for btrfs developers only.
78
79 If unsure, say N.
80
81config BTRFS_EXPERIMENTAL
82 bool "Btrfs experimental features"
83 depends on BTRFS_FS
84 default n
85 help
86 Enable experimental features. These features may not be stable enough
87 for end users. This is meant for btrfs developers or users who wish
88 to test the functionality and report problems.
89
90 Current list:
91
92 - extent map shrinker - performance problems with too frequent shrinks
93
94 - send stream protocol v3 - fs-verity support
95
96 - checksum offload mode - sysfs knob to affect when checksums are
97 calculated (at IO time, or in a thread)
98
99 - raid-stripe-tree - additional mapping of extents to devices to
100 support RAID1* profiles on zoned devices,
101 RAID56 not yet supported
102
103 - extent tree v2 - complex rework of extent tracking
104
105 If unsure, say N.
106
107config BTRFS_FS_REF_VERIFY
108 bool "Btrfs with the ref verify tool compiled in"
109 depends on BTRFS_FS
110 default n
111 help
112 Enable run-time extent reference verification instrumentation. This
113 is meant to be used by btrfs developers for tracking down extent
114 reference problems or verifying they didn't break something.
115
116 If unsure, say N.