1# SPDX-License-Identifier: GPL-2.0
  2
  3config BTRFS_FS
  4	tristate "Btrfs filesystem support"
  5	select CRYPTO
  6	select CRYPTO_CRC32C
  7	select LIBCRC32C
  8	select CRYPTO_XXHASH
  9	select CRYPTO_SHA256
 10	select CRYPTO_BLAKE2B
 11	select ZLIB_INFLATE
 12	select ZLIB_DEFLATE
 13	select LZO_COMPRESS
 14	select LZO_DECOMPRESS
 15	select ZSTD_COMPRESS
 16	select ZSTD_DECOMPRESS
 17	select FS_IOMAP
 18	select RAID6_PQ
 19	select XOR_BLOCKS
 20	select SRCU
 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	  http://btrfs.wiki.kernel.org.
 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_CHECK_INTEGRITY
 52	bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
 53	depends on BTRFS_FS
 54	help
 55	  Adds code that examines all block write requests (including
 56	  writes of the super block). The goal is to verify that the
 57	  state of the filesystem on disk is always consistent, i.e.,
 58	  after a power-loss or kernel panic event the filesystem is
 59	  in a consistent state.
 60
 61	  If the integrity check tool is included and activated in
 62	  the mount options, plenty of kernel memory is used, and
 63	  plenty of additional CPU cycles are spent. Enabling this
 64	  functionality is not intended for normal use.
 65
 66	  In most cases, unless you are a btrfs developer who needs
 67	  to verify the integrity of (super)-block write requests
 68	  during the run of a regression test, say N
 69
 70config BTRFS_FS_RUN_SANITY_TESTS
 71	bool "Btrfs will run sanity tests upon loading"
 72	depends on BTRFS_FS
 73	help
 74	  This will run some basic sanity tests on the free space cache
 75	  code to make sure it is acting as it should.  These are mostly
 76	  regression tests and are only really interesting to btrfs
 77	  developers.
 78
 79	  If unsure, say N.
 80
 81config BTRFS_DEBUG
 82	bool "Btrfs debugging support"
 83	depends on BTRFS_FS
 84	help
 85	  Enable run-time debugging support for the btrfs filesystem. This may
 86	  enable additional and expensive checks with negative impact on
 87	  performance, or export extra information via sysfs.
 88
 89	  If unsure, say N.
 90
 91config BTRFS_ASSERT
 92	bool "Btrfs assert support"
 93	depends on BTRFS_FS
 94	help
 95	  Enable run-time assertion checking.  This will result in panics if
 96	  any of the assertions trip.  This is meant for btrfs developers only.
 97
 98	  If unsure, say N.
 99
100config BTRFS_FS_REF_VERIFY
101	bool "Btrfs with the ref verify tool compiled in"
102	depends on BTRFS_FS
103	default n
104	help
105	  Enable run-time extent reference verification instrumentation.  This
106	  is meant to be used by btrfs developers for tracking down extent
107	  reference problems or verifying they didn't break something.
108
109	  If unsure, say N.

  1# SPDX-License-Identifier: GPL-2.0
  2
  3config BTRFS_FS
  4	tristate "Btrfs filesystem support"
  5	select CRYPTO
  6	select CRYPTO_CRC32C
  7	select LIBCRC32C
 
 
 
  8	select ZLIB_INFLATE
  9	select ZLIB_DEFLATE
 10	select LZO_COMPRESS
 11	select LZO_DECOMPRESS
 12	select ZSTD_COMPRESS
 13	select ZSTD_DECOMPRESS
 
 14	select RAID6_PQ
 15	select XOR_BLOCKS
 16	select SRCU
 
 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.