1 # SPDX-License-Identifier: GPL-2.0
2 
3 config 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 
41 config 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 
51 config 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 
62 config 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 
72 config 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 
81 config BTRFS_FS_REF_VERIFY
82 	bool "Btrfs with the ref verify tool compiled in"
83 	depends on BTRFS_FS
84 	default n
85 	help
86 	  Enable run-time extent reference verification instrumentation.  This
87 	  is meant to be used by btrfs developers for tracking down extent
88 	  reference problems or verifying they didn't break something.
89 
90 	  If unsure, say N.
91