fs/btrfs/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2
   3 config 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
  36 config 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
  46 config 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
  65 config 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
  76 config 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
  86 config 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
  95 config 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.