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- # SPDX-License-Identifier: GPL-2.0
- config BTRFS_FS
- tristate "Btrfs filesystem support"
- select CRYPTO
- select CRYPTO_CRC32C
- select LIBCRC32C
- select ZLIB_INFLATE
- select ZLIB_DEFLATE
- select LZO_COMPRESS
- select LZO_DECOMPRESS
- select ZSTD_COMPRESS
- select ZSTD_DECOMPRESS
- select RAID6_PQ
- select XOR_BLOCKS
- select SRCU
- depends on !PPC_256K_PAGES # powerpc
- depends on !PAGE_SIZE_256KB # hexagon
- help
- Btrfs is a general purpose copy-on-write filesystem with extents,
- writable snapshotting, support for multiple devices and many more
- features focused on fault tolerance, repair and easy administration.
- The filesystem disk format is no longer unstable, and it's not
- expected to change unless there are strong reasons to do so. If there
- is a format change, file systems with a unchanged format will
- continue to be mountable and usable by newer kernels.
- For more information, please see the web pages at
- http://btrfs.wiki.kernel.org.
- To compile this file system support as a module, choose M here. The
- module will be called btrfs.
- If unsure, say N.
- config BTRFS_FS_POSIX_ACL
- bool "Btrfs POSIX Access Control Lists"
- depends on BTRFS_FS
- select FS_POSIX_ACL
- help
- POSIX Access Control Lists (ACLs) support permissions for users and
- groups beyond the owner/group/world scheme.
- If you don't know what Access Control Lists are, say N
- config BTRFS_FS_CHECK_INTEGRITY
- bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
- depends on BTRFS_FS
- help
- Adds code that examines all block write requests (including
- writes of the super block). The goal is to verify that the
- state of the filesystem on disk is always consistent, i.e.,
- after a power-loss or kernel panic event the filesystem is
- in a consistent state.
- If the integrity check tool is included and activated in
- the mount options, plenty of kernel memory is used, and
- plenty of additional CPU cycles are spent. Enabling this
- functionality is not intended for normal use.
- In most cases, unless you are a btrfs developer who needs
- to verify the integrity of (super)-block write requests
- during the run of a regression test, say N
- config BTRFS_FS_RUN_SANITY_TESTS
- bool "Btrfs will run sanity tests upon loading"
- depends on BTRFS_FS
- help
- This will run some basic sanity tests on the free space cache
- code to make sure it is acting as it should. These are mostly
- regression tests and are only really interesting to btrfs
- developers.
- If unsure, say N.
- config BTRFS_DEBUG
- bool "Btrfs debugging support"
- depends on BTRFS_FS
- help
- Enable run-time debugging support for the btrfs filesystem. This may
- enable additional and expensive checks with negative impact on
- performance, or export extra information via sysfs.
- If unsure, say N.
- config BTRFS_ASSERT
- bool "Btrfs assert support"
- depends on BTRFS_FS
- help
- Enable run-time assertion checking. This will result in panics if
- any of the assertions trip. This is meant for btrfs developers only.
- If unsure, say N.
- config BTRFS_FS_REF_VERIFY
- bool "Btrfs with the ref verify tool compiled in"
- depends on BTRFS_FS
- default n
- help
- Enable run-time extent reference verification instrumentation. This
- is meant to be used by btrfs developers for tracking down extent
- reference problems or verifying they didn't break something.
- If unsure, say N.
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