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