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