diff options
Diffstat (limited to 'fs/btrfs/Kconfig')
| -rw-r--r-- | fs/btrfs/Kconfig | 112 |
1 files changed, 79 insertions, 33 deletions
diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig index 2b3b83296977..4438637c8900 100644 --- a/fs/btrfs/Kconfig +++ b/fs/btrfs/Kconfig @@ -1,20 +1,37 @@ +# SPDX-License-Identifier: GPL-2.0 + config BTRFS_FS tristate "Btrfs filesystem support" - select LIBCRC32C + select BLK_CGROUP_PUNT_BIO + select CRC32 + select CRYPTO + select CRYPTO_CRC32C + select CRYPTO_XXHASH + select CRYPTO_SHA256 + select CRYPTO_BLAKE2B select ZLIB_INFLATE select ZLIB_DEFLATE select LZO_COMPRESS select LZO_DECOMPRESS + select ZSTD_COMPRESS + select ZSTD_DECOMPRESS + select FS_IOMAP select RAID6_PQ select XOR_BLOCKS + depends on PAGE_SIZE_LESS_THAN_256KB help - Btrfs is a new filesystem with extents, writable snapshotting, - support for multiple devices and many more features. + 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. - Btrfs is highly experimental, and THE DISK FORMAT IS NOT YET - FINALIZED. You should say N here unless you are interested in - testing Btrfs with non-critical data. + For more information, please see the web pages at + https://btrfs.readthedocs.io To compile this file system support as a module, choose M here. The module will be called btrfs. @@ -29,46 +46,75 @@ config BTRFS_FS_POSIX_ACL POSIX Access Control Lists (ACLs) support permissions for users and groups beyond the owner/group/world scheme. - To learn more about Access Control Lists, visit the POSIX ACLs for - Linux website <http://acl.bestbits.at/>. - 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)" +config BTRFS_FS_RUN_SANITY_TESTS + bool "Btrfs will run sanity tests upon loading" 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. + This will run sanity tests for core functionality like free space, + extent maps, extent io, extent buffers, inodes, qgroups and others, + at module load time. These are mostly regression tests and are only + interesting to developers. - 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. + If unsure, say N. - 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_DEBUG + bool "Btrfs debugging support" + depends on BTRFS_FS + select REF_TRACKER if STACKTRACE_SUPPORT + help + Enable run-time debugging support for the btrfs filesystem. -config BTRFS_FS_RUN_SANITY_TESTS - bool "Btrfs will run sanity tests upon loading" + Additional potentially expensive checks, debugging functionality or + sysfs exported information is enabled, like leak checks of internal + objects, optional forced space fragmentation and /sys/fs/btrfs/debug . + This has negative impact on performance. + + If unsure, say N. + +config BTRFS_ASSERT + bool "Btrfs assert support" 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 devlopers. + Enable run-time assertion checking. Additional safety checks are + done, simple enough not to affect performance but verify invariants + and assumptions of code to run properly. This may result in panics, + and is meant for developers but can be enabled in general. If unsure, say N. -config BTRFS_DEBUG - bool "Btrfs debugging support" +config BTRFS_EXPERIMENTAL + bool "Btrfs experimental features" depends on BTRFS_FS + default n 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. + Enable experimental features. These features may not be stable enough + for end users. This is meant for btrfs developers or users who wish + to test the functionality and report problems. + + Current list: + + - COW fixup worker warning - last warning before removing the + functionality catching out-of-band page + dirtying, not necessary since 5.8 + + - RAID mirror read policy - additional read policies for balancing + reading from redundant block group + profiles (currently: pid, round-robin, + fixed devid) + + - send stream protocol v3 - fs-verity support + + - checksum offload mode - sysfs knob to affect when checksums are + calculated (at IO time, or in a thread) + + - raid-stripe-tree - additional mapping of extents to devices to + support RAID1* profiles on zoned devices, + RAID56 not yet supported + + - extent tree v2 - complex rework of extent tracking + + - large folio support If unsure, say N. |