xref: /openbmc/linux/fs/btrfs/Kconfig (revision 7c768f84)
1# SPDX-License-Identifier: GPL-2.0
2
3config BTRFS_FS
4	tristate "Btrfs filesystem support"
5	select LIBCRC32C
6	select ZLIB_INFLATE
7	select ZLIB_DEFLATE
8	select LZO_COMPRESS
9	select LZO_DECOMPRESS
10	select ZSTD_COMPRESS
11	select ZSTD_DECOMPRESS
12	select RAID6_PQ
13	select XOR_BLOCKS
14	select SRCU
15
16	help
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.
20
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.
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.
33
34config 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
42	  If you don't know what Access Control Lists are, say N
43
44config 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
62
63config 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
69	  regression tests and are only really interesting to btrfs
70	  developers.
71
72	  If unsure, say N.
73
74config 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.
83
84config 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.
92
93config 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.
103