1config BTRFS_FS 2 tristate "Btrfs filesystem support" 3 select CRYPTO 4 select CRYPTO_CRC32C 5 select ZLIB_INFLATE 6 select ZLIB_DEFLATE 7 select LZO_COMPRESS 8 select LZO_DECOMPRESS 9 select ZSTD_COMPRESS 10 select ZSTD_DECOMPRESS 11 select RAID6_PQ 12 select XOR_BLOCKS 13 select SRCU 14 15 help 16 Btrfs is a general purpose copy-on-write filesystem with extents, 17 writable snapshotting, support for multiple devices and many more 18 features focused on fault tolerance, repair and easy administration. 19 20 The filesystem disk format is no longer unstable, and it's not 21 expected to change unless there are strong reasons to do so. If there 22 is a format change, file systems with a unchanged format will 23 continue to be mountable and usable by newer kernels. 24 25 For more information, please see the web pages at 26 http://btrfs.wiki.kernel.org. 27 28 To compile this file system support as a module, choose M here. The 29 module will be called btrfs. 30 31 If unsure, say N. 32 33config BTRFS_FS_POSIX_ACL 34 bool "Btrfs POSIX Access Control Lists" 35 depends on BTRFS_FS 36 select FS_POSIX_ACL 37 help 38 POSIX Access Control Lists (ACLs) support permissions for users and 39 groups beyond the owner/group/world scheme. 40 41 If you don't know what Access Control Lists are, say N 42 43config BTRFS_FS_CHECK_INTEGRITY 44 bool "Btrfs with integrity check tool compiled in (DANGEROUS)" 45 depends on BTRFS_FS 46 help 47 Adds code that examines all block write requests (including 48 writes of the super block). The goal is to verify that the 49 state of the filesystem on disk is always consistent, i.e., 50 after a power-loss or kernel panic event the filesystem is 51 in a consistent state. 52 53 If the integrity check tool is included and activated in 54 the mount options, plenty of kernel memory is used, and 55 plenty of additional CPU cycles are spent. Enabling this 56 functionality is not intended for normal use. 57 58 In most cases, unless you are a btrfs developer who needs 59 to verify the integrity of (super)-block write requests 60 during the run of a regression test, say N 61 62config BTRFS_FS_RUN_SANITY_TESTS 63 bool "Btrfs will run sanity tests upon loading" 64 depends on BTRFS_FS 65 help 66 This will run some basic sanity tests on the free space cache 67 code to make sure it is acting as it should. These are mostly 68 regression tests and are only really interesting to btrfs 69 developers. 70 71 If unsure, say N. 72 73config BTRFS_DEBUG 74 bool "Btrfs debugging support" 75 depends on BTRFS_FS 76 help 77 Enable run-time debugging support for the btrfs filesystem. This may 78 enable additional and expensive checks with negative impact on 79 performance, or export extra information via sysfs. 80 81 If unsure, say N. 82 83config BTRFS_ASSERT 84 bool "Btrfs assert support" 85 depends on BTRFS_FS 86 help 87 Enable run-time assertion checking. This will result in panics if 88 any of the assertions trip. This is meant for btrfs developers only. 89 90 If unsure, say N. 91 92config BTRFS_FS_REF_VERIFY 93 bool "Btrfs with the ref verify tool compiled in" 94 depends on BTRFS_FS 95 default n 96 help 97 Enable run-time extent reference verification instrumentation. This 98 is meant to be used by btrfs developers for tracking down extent 99 reference problems or verifying they didn't break something. 100 101 If unsure, say N. 102