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_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.
 
 
 
 
 
 
 
 
 

 
 
 1config BTRFS_FS
 2	tristate "Btrfs filesystem (EXPERIMENTAL) Unstable disk format"
 3	depends on EXPERIMENTAL
 
 
 4	select LIBCRC32C
 
 
 
 5	select ZLIB_INFLATE
 6	select ZLIB_DEFLATE
 7	select LZO_COMPRESS
 8	select LZO_DECOMPRESS
 
 
 
 
 
 
 
 9	help
10	  Btrfs is a new filesystem with extents, writable snapshotting,
11	  support for multiple devices and many more features.
 
 
 
 
 
 
12
13	  Btrfs is highly experimental, and THE DISK FORMAT IS NOT YET
14	  FINALIZED.  You should say N here unless you are interested in
15	  testing Btrfs with non-critical data.
16
17	  To compile this file system support as a module, choose M here. The
18	  module will be called btrfs.
19
20	  If unsure, say N.
21
22config BTRFS_FS_POSIX_ACL
23	bool "Btrfs POSIX Access Control Lists"
24	depends on BTRFS_FS
25	select FS_POSIX_ACL
26	help
27	  POSIX Access Control Lists (ACLs) support permissions for users and
28	  groups beyond the owner/group/world scheme.
29
30	  To learn more about Access Control Lists, visit the POSIX ACLs for
31	  Linux website <http://acl.bestbits.at/>.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
32
33	  If you don't know what Access Control Lists are, say N
34
35config BTRFS_FS_CHECK_INTEGRITY
36	bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
37	depends on BTRFS_FS
 
38	help
39	  Adds code that examines all block write requests (including
40	  writes of the super block). The goal is to verify that the
41	  state of the filesystem on disk is always consistent, i.e.,
42	  after a power-loss or kernel panic event the filesystem is
43	  in a consistent state.
44
45	  If the integrity check tool is included and activated in
46	  the mount options, plenty of kernel memory is used, and
47	  plenty of additional CPU cycles are spent. Enabling this
48	  functionality is not intended for normal use.
49
50	  In most cases, unless you are a btrfs developer who needs
51	  to verify the integrity of (super)-block write requests
52	  during the run of a regression test, say N