Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1# SPDX-License-Identifier: GPL-2.0
2
3config BTRFS_FS
4 tristate "Btrfs filesystem support"
5 select BLK_CGROUP_PUNT_BIO
6 select CRC32
7 select CRYPTO
8 select CRYPTO_CRC32C
9 select CRYPTO_XXHASH
10 select CRYPTO_SHA256
11 select CRYPTO_BLAKE2B
12 select ZLIB_INFLATE
13 select ZLIB_DEFLATE
14 select LZO_COMPRESS
15 select LZO_DECOMPRESS
16 select ZSTD_COMPRESS
17 select ZSTD_DECOMPRESS
18 select FS_IOMAP
19 select RAID6_PQ
20 select XOR_BLOCKS
21 depends on PAGE_SIZE_LESS_THAN_256KB
22
23 help
24 Btrfs is a general purpose copy-on-write filesystem with extents,
25 writable snapshotting, support for multiple devices and many more
26 features focused on fault tolerance, repair and easy administration.
27
28 The filesystem disk format is no longer unstable, and it's not
29 expected to change unless there are strong reasons to do so. If there
30 is a format change, file systems with a unchanged format will
31 continue to be mountable and usable by newer kernels.
32
33 For more information, please see the web pages at
34 https://btrfs.readthedocs.io
35
36 To compile this file system support as a module, choose M here. The
37 module will be called btrfs.
38
39 If unsure, say N.
40
41config BTRFS_FS_POSIX_ACL
42 bool "Btrfs POSIX Access Control Lists"
43 depends on BTRFS_FS
44 select FS_POSIX_ACL
45 help
46 POSIX Access Control Lists (ACLs) support permissions for users and
47 groups beyond the owner/group/world scheme.
48
49 If you don't know what Access Control Lists are, say N
50
51config BTRFS_FS_RUN_SANITY_TESTS
52 bool "Btrfs will run sanity tests upon loading"
53 depends on BTRFS_FS
54 help
55 This will run sanity tests for core functionality like free space,
56 extent maps, extent io, extent buffers, inodes, qgroups and others,
57 at module load time. These are mostly regression tests and are only
58 interesting to developers.
59
60 If unsure, say N.
61
62config BTRFS_DEBUG
63 bool "Btrfs debugging support"
64 depends on BTRFS_FS
65 select REF_TRACKER if STACKTRACE_SUPPORT
66 help
67 Enable run-time debugging support for the btrfs filesystem.
68
69 Additional potentially expensive checks, debugging functionality or
70 sysfs exported information is enabled, like leak checks of internal
71 objects, optional forced space fragmentation and /sys/fs/btrfs/debug .
72 This has negative impact on performance.
73
74 If unsure, say N.
75
76config BTRFS_ASSERT
77 bool "Btrfs assert support"
78 depends on BTRFS_FS
79 help
80 Enable run-time assertion checking. Additional safety checks are
81 done, simple enough not to affect performance but verify invariants
82 and assumptions of code to run properly. This may result in panics,
83 and is meant for developers but can be enabled in general.
84
85 If unsure, say N.
86
87config BTRFS_EXPERIMENTAL
88 bool "Btrfs experimental features"
89 depends on BTRFS_FS
90 default n
91 help
92 Enable experimental features. These features may not be stable enough
93 for end users. This is meant for btrfs developers or users who wish
94 to test the functionality and report problems.
95
96 Current list:
97
98 - COW fixup worker warning - last warning before removing the
99 functionality catching out-of-band page
100 dirtying, not necessary since 5.8
101
102 - RAID mirror read policy - additional read policies for balancing
103 reading from redundant block group
104 profiles (currently: pid, round-robin,
105 fixed devid)
106
107 - send stream protocol v3 - fs-verity support
108
109 - checksum offload mode - sysfs knob to affect when checksums are
110 calculated (at IO time, or in a thread)
111
112 - raid-stripe-tree - additional mapping of extents to devices to
113 support RAID1* profiles on zoned devices,
114 RAID56 not yet supported
115
116 - extent tree v2 - complex rework of extent tracking
117
118 - large folio support
119
120 If unsure, say N.