1335debeeSAlexey Dobriyanconfig BTRFS_FS 2335debeeSAlexey Dobriyan tristate "Btrfs filesystem (EXPERIMENTAL) Unstable disk format" 3335debeeSAlexey Dobriyan depends on EXPERIMENTAL 4335debeeSAlexey Dobriyan select LIBCRC32C 5335debeeSAlexey Dobriyan select ZLIB_INFLATE 6335debeeSAlexey Dobriyan select ZLIB_DEFLATE 7a6fa6faeSLi Zefan select LZO_COMPRESS 8a6fa6faeSLi Zefan select LZO_DECOMPRESS 9335debeeSAlexey Dobriyan help 10335debeeSAlexey Dobriyan Btrfs is a new filesystem with extents, writable snapshotting, 11335debeeSAlexey Dobriyan support for multiple devices and many more features. 12335debeeSAlexey Dobriyan 13335debeeSAlexey Dobriyan Btrfs is highly experimental, and THE DISK FORMAT IS NOT YET 14335debeeSAlexey Dobriyan FINALIZED. You should say N here unless you are interested in 15335debeeSAlexey Dobriyan testing Btrfs with non-critical data. 16335debeeSAlexey Dobriyan 17335debeeSAlexey Dobriyan To compile this file system support as a module, choose M here. The 18335debeeSAlexey Dobriyan module will be called btrfs. 19335debeeSAlexey Dobriyan 20335debeeSAlexey Dobriyan If unsure, say N. 21bef62ef3SChristian Hesse 22bef62ef3SChristian Hesseconfig BTRFS_FS_POSIX_ACL 23bef62ef3SChristian Hesse bool "Btrfs POSIX Access Control Lists" 24bef62ef3SChristian Hesse depends on BTRFS_FS 25bef62ef3SChristian Hesse select FS_POSIX_ACL 26bef62ef3SChristian Hesse help 27bef62ef3SChristian Hesse POSIX Access Control Lists (ACLs) support permissions for users and 28bef62ef3SChristian Hesse groups beyond the owner/group/world scheme. 29bef62ef3SChristian Hesse 30bef62ef3SChristian Hesse To learn more about Access Control Lists, visit the POSIX ACLs for 31bef62ef3SChristian Hesse Linux website <http://acl.bestbits.at/>. 32bef62ef3SChristian Hesse 33bef62ef3SChristian Hesse If you don't know what Access Control Lists are, say N 34c975dd46SStefan Behrens 35c975dd46SStefan Behrensconfig BTRFS_FS_CHECK_INTEGRITY 36c975dd46SStefan Behrens bool "Btrfs with integrity check tool compiled in (DANGEROUS)" 37c975dd46SStefan Behrens depends on BTRFS_FS 38c975dd46SStefan Behrens help 39c975dd46SStefan Behrens Adds code that examines all block write requests (including 40c975dd46SStefan Behrens writes of the super block). The goal is to verify that the 41c975dd46SStefan Behrens state of the filesystem on disk is always consistent, i.e., 42c975dd46SStefan Behrens after a power-loss or kernel panic event the filesystem is 43c975dd46SStefan Behrens in a consistent state. 44c975dd46SStefan Behrens 45c975dd46SStefan Behrens If the integrity check tool is included and activated in 46c975dd46SStefan Behrens the mount options, plenty of kernel memory is used, and 47c975dd46SStefan Behrens plenty of additional CPU cycles are spent. Enabling this 48c975dd46SStefan Behrens functionality is not intended for normal use. 49c975dd46SStefan Behrens 50c975dd46SStefan Behrens In most cases, unless you are a btrfs developer who needs 51c975dd46SStefan Behrens to verify the integrity of (super)-block write requests 52c975dd46SStefan Behrens during the run of a regression test, say N 53