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	depends on !PPC_256K_PAGES	# powerpc
16	depends on !PAGE_SIZE_256KB	# hexagon
17
18	help
19	  Btrfs is a general purpose copy-on-write filesystem with extents,
20	  writable snapshotting, support for multiple devices and many more
21	  features focused on fault tolerance, repair and easy administration.
22
23	  The filesystem disk format is no longer unstable, and it's not
24	  expected to change unless there are strong reasons to do so. If there
25	  is a format change, file systems with a unchanged format will
26	  continue to be mountable and usable by newer kernels.
27
28	  For more information, please see the web pages at
29	  http://btrfs.wiki.kernel.org.
30
31	  To compile this file system support as a module, choose M here. The
32	  module will be called btrfs.
33
34	  If unsure, say N.
35
36config BTRFS_FS_POSIX_ACL
37	bool "Btrfs POSIX Access Control Lists"
38	depends on BTRFS_FS
39	select FS_POSIX_ACL
40	help
41	  POSIX Access Control Lists (ACLs) support permissions for users and
42	  groups beyond the owner/group/world scheme.
43
44	  If you don't know what Access Control Lists are, say N
45
46config BTRFS_FS_CHECK_INTEGRITY
47	bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
48	depends on BTRFS_FS
49	help
50	  Adds code that examines all block write requests (including
51	  writes of the super block). The goal is to verify that the
52	  state of the filesystem on disk is always consistent, i.e.,
53	  after a power-loss or kernel panic event the filesystem is
54	  in a consistent state.
55
56	  If the integrity check tool is included and activated in
57	  the mount options, plenty of kernel memory is used, and
58	  plenty of additional CPU cycles are spent. Enabling this
59	  functionality is not intended for normal use.
60
61	  In most cases, unless you are a btrfs developer who needs
62	  to verify the integrity of (super)-block write requests
63	  during the run of a regression test, say N
64
65config BTRFS_FS_RUN_SANITY_TESTS
66	bool "Btrfs will run sanity tests upon loading"
67	depends on BTRFS_FS
68	help
69	  This will run some basic sanity tests on the free space cache
70	  code to make sure it is acting as it should.  These are mostly
71	  regression tests and are only really interesting to btrfs
72	  developers.
73
74	  If unsure, say N.
75
76config BTRFS_DEBUG
77	bool "Btrfs debugging support"
78	depends on BTRFS_FS
79	help
80	  Enable run-time debugging support for the btrfs filesystem. This may
81	  enable additional and expensive checks with negative impact on
82	  performance, or export extra information via sysfs.
83
84	  If unsure, say N.
85
86config BTRFS_ASSERT
87	bool "Btrfs assert support"
88	depends on BTRFS_FS
89	help
90	  Enable run-time assertion checking.  This will result in panics if
91	  any of the assertions trip.  This is meant for btrfs developers only.
92
93	  If unsure, say N.
94
95config BTRFS_FS_REF_VERIFY
96	bool "Btrfs with the ref verify tool compiled in"
97	depends on BTRFS_FS
98	default n
99	help
100	  Enable run-time extent reference verification instrumentation.  This
101	  is meant to be used by btrfs developers for tracking down extent
102	  reference problems or verifying they didn't break something.
103
104	  If unsure, say N.
105