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 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 RAID6_PQ
  18         select XOR_BLOCKS
  19         select SRCU
  20
  21         help
  22           Btrfs is a general purpose copy-on-write filesystem with extents,
  23           writable snapshotting, support for multiple devices and many more
  24           features focused on fault tolerance, repair and easy administration.
  25
  26           The filesystem disk format is no longer unstable, and it's not
  27           expected to change unless there are strong reasons to do so. If there
  28           is a format change, file systems with a unchanged format will
  29           continue to be mountable and usable by newer kernels.
  30
  31           For more information, please see the web pages at
  32           http://btrfs.wiki.kernel.org.
  33
  34           To compile this file system support as a module, choose M here. The
  35           module will be called btrfs.
  36
  37           If unsure, say N.
  38
  39 config BTRFS_FS_POSIX_ACL
  40         bool "Btrfs POSIX Access Control Lists"
  41         depends on BTRFS_FS
  42         select FS_POSIX_ACL
  43         help
  44           POSIX Access Control Lists (ACLs) support permissions for users and
  45           groups beyond the owner/group/world scheme.
  46
  47           If you don't know what Access Control Lists are, say N
  48
  49 config BTRFS_FS_CHECK_INTEGRITY
  50         bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
  51         depends on BTRFS_FS
  52         help
  53           Adds code that examines all block write requests (including
  54           writes of the super block). The goal is to verify that the
  55           state of the filesystem on disk is always consistent, i.e.,
  56           after a power-loss or kernel panic event the filesystem is
  57           in a consistent state.
  58
  59           If the integrity check tool is included and activated in
  60           the mount options, plenty of kernel memory is used, and
  61           plenty of additional CPU cycles are spent. Enabling this
  62           functionality is not intended for normal use.
  63
  64           In most cases, unless you are a btrfs developer who needs
  65           to verify the integrity of (super)-block write requests
  66           during the run of a regression test, say N
  67
  68 config BTRFS_FS_RUN_SANITY_TESTS
  69         bool "Btrfs will run sanity tests upon loading"
  70         depends on BTRFS_FS
  71         help
  72           This will run some basic sanity tests on the free space cache
  73           code to make sure it is acting as it should.  These are mostly
  74           regression tests and are only really interesting to btrfs
  75           developers.
  76
  77           If unsure, say N.
  78
  79 config BTRFS_DEBUG
  80         bool "Btrfs debugging support"
  81         depends on BTRFS_FS
  82         help
  83           Enable run-time debugging support for the btrfs filesystem. This may
  84           enable additional and expensive checks with negative impact on
  85           performance, or export extra information via sysfs.
  86
  87           If unsure, say N.
  88
  89 config BTRFS_ASSERT
  90         bool "Btrfs assert support"
  91         depends on BTRFS_FS
  92         help
  93           Enable run-time assertion checking.  This will result in panics if
  94           any of the assertions trip.  This is meant for btrfs developers only.
  95
  96           If unsure, say N.
  97
  98 config BTRFS_FS_REF_VERIFY
  99         bool "Btrfs with the ref verify tool compiled in"
 100         depends on BTRFS_FS
 101         default n
 102         help
 103           Enable run-time extent reference verification instrumentation.  This
 104           is meant to be used by btrfs developers for tracking down extent
 105           reference problems or verifying they didn't break something.
 106
 107           If unsure, say N.