1config BTRFS_FS 2 tristate "Btrfs filesystem support" 3 select LIBCRC32C 4 select ZLIB_INFLATE 5 select ZLIB_DEFLATE 6 select LZO_COMPRESS 7 select LZO_DECOMPRESS 8 select ZSTD_COMPRESS 9 select ZSTD_DECOMPRESS 10 select RAID6_PQ 11 select XOR_BLOCKS 12 select SRCU 13 14 help 15 Btrfs is a general purpose copy-on-write filesystem with extents, 16 writable snapshotting, support for multiple devices and many more 17 features focused on fault tolerance, repair and easy administration. 18 19 The filesystem disk format is no longer unstable, and it's not 20 expected to change unless there are strong reasons to do so. If there 21 is a format change, file systems with a unchanged format will 22 continue to be mountable and usable by newer kernels. 23 24 For more information, please see the web pages at 25 http://btrfs.wiki.kernel.org. 26 27 To compile this file system support as a module, choose M here. The 28 module will be called btrfs. 29 30 If unsure, say N. 31 32config BTRFS_FS_POSIX_ACL 33 bool "Btrfs POSIX Access Control Lists" 34 depends on BTRFS_FS 35 select FS_POSIX_ACL 36 help 37 POSIX Access Control Lists (ACLs) support permissions for users and 38 groups beyond the owner/group/world scheme. 39 40 If you don't know what Access Control Lists are, say N 41 42config BTRFS_FS_CHECK_INTEGRITY 43 bool "Btrfs with integrity check tool compiled in (DANGEROUS)" 44 depends on BTRFS_FS 45 help 46 Adds code that examines all block write requests (including 47 writes of the super block). The goal is to verify that the 48 state of the filesystem on disk is always consistent, i.e., 49 after a power-loss or kernel panic event the filesystem is 50 in a consistent state. 51 52 If the integrity check tool is included and activated in 53 the mount options, plenty of kernel memory is used, and 54 plenty of additional CPU cycles are spent. Enabling this 55 functionality is not intended for normal use. 56 57 In most cases, unless you are a btrfs developer who needs 58 to verify the integrity of (super)-block write requests 59 during the run of a regression test, say N 60 61config BTRFS_FS_RUN_SANITY_TESTS 62 bool "Btrfs will run sanity tests upon loading" 63 depends on BTRFS_FS 64 help 65 This will run some basic sanity tests on the free space cache 66 code to make sure it is acting as it should. These are mostly 67 regression tests and are only really interesting to btrfs 68 developers. 69 70 If unsure, say N. 71 72config BTRFS_DEBUG 73 bool "Btrfs debugging support" 74 depends on BTRFS_FS 75 help 76 Enable run-time debugging support for the btrfs filesystem. This may 77 enable additional and expensive checks with negative impact on 78 performance, or export extra information via sysfs. 79 80 If unsure, say N. 81 82config BTRFS_ASSERT 83 bool "Btrfs assert support" 84 depends on BTRFS_FS 85 help 86 Enable run-time assertion checking. This will result in panics if 87 any of the assertions trip. This is meant for btrfs developers only. 88 89 If unsure, say N. 90 91config BTRFS_FS_REF_VERIFY 92 bool "Btrfs with the ref verify tool compiled in" 93 depends on BTRFS_FS 94 default n 95 help 96 Enable run-time extent reference verification instrumentation. This 97 is meant to be used by btrfs developers for tracking down extent 98 reference problems or verifying they didn't break something. 99 100 If unsure, say N. 101