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.

 
 
 1config BTRFS_FS
 2	tristate "Btrfs filesystem support"
 
 3	select CRYPTO
 4	select CRYPTO_CRC32C
 
 
 
 
 5	select ZLIB_INFLATE
 6	select ZLIB_DEFLATE
 7	select LZO_COMPRESS
 8	select LZO_DECOMPRESS
 
 
 
 9	select RAID6_PQ
10	select XOR_BLOCKS
 
11
12	help
13	  Btrfs is a general purpose copy-on-write filesystem with extents,
14	  writable snapshotting, support for multiple devices and many more
15	  features focused on fault tolerance, repair and easy administration.
16
17	  The filesystem disk format is no longer unstable, and it's not
18	  expected to change unless there are strong reasons to do so. If there
19	  is a format change, file systems with a unchanged format will
20	  continue to be mountable and usable by newer kernels.
21
22	  For more information, please see the web pages at
23	  http://btrfs.wiki.kernel.org.
24
25	  To compile this file system support as a module, choose M here. The
26	  module will be called btrfs.
27
28	  If unsure, say N.
29
30config BTRFS_FS_POSIX_ACL
31	bool "Btrfs POSIX Access Control Lists"
32	depends on BTRFS_FS
33	select FS_POSIX_ACL
34	help
35	  POSIX Access Control Lists (ACLs) support permissions for users and
36	  groups beyond the owner/group/world scheme.
37
38	  To learn more about Access Control Lists, visit the POSIX ACLs for
39	  Linux website <http://acl.bestbits.at/>.
40
41	  If you don't know what Access Control Lists are, say N
42
43config BTRFS_FS_CHECK_INTEGRITY
44	bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
45	depends on BTRFS_FS
46	help
47	  Adds code that examines all block write requests (including
48	  writes of the super block). The goal is to verify that the
49	  state of the filesystem on disk is always consistent, i.e.,
50	  after a power-loss or kernel panic event the filesystem is
51	  in a consistent state.
52
53	  If the integrity check tool is included and activated in
54	  the mount options, plenty of kernel memory is used, and
55	  plenty of additional CPU cycles are spent. Enabling this
56	  functionality is not intended for normal use.
57
58	  In most cases, unless you are a btrfs developer who needs
59	  to verify the integrity of (super)-block write requests
60	  during the run of a regression test, say N
61
62config BTRFS_FS_RUN_SANITY_TESTS
63	bool "Btrfs will run sanity tests upon loading"
64	depends on BTRFS_FS
65	help
66	  This will run some basic sanity tests on the free space cache
67	  code to make sure it is acting as it should.  These are mostly
68	  regression tests and are only really interesting to btrfs
69	  developers.
70
71	  If unsure, say N.
72
73config BTRFS_DEBUG
74	bool "Btrfs debugging support"
75	depends on BTRFS_FS
76	help
77	  Enable run-time debugging support for the btrfs filesystem. This may
78	  enable additional and expensive checks with negative impact on
79	  performance, or export extra information via sysfs.
80
81	  If unsure, say N.
82
83config BTRFS_ASSERT
84	bool "Btrfs assert support"
85	depends on BTRFS_FS
86	help
87	  Enable run-time assertion checking.  This will result in panics if
88	  any of the assertions trip.  This is meant for btrfs developers only.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
89
90	  If unsure, say N.