| # SPDX-License-Identifier: GPL-2.0 |
| |
| config BTRFS_FS |
| tristate "Btrfs filesystem support" |
| 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 |
| |
| 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. |
