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 953b381b3SDavid Woodhouse select RAID6_PQ 1053b381b3SDavid Woodhouse 11335debeeSAlexey Dobriyan help 12335debeeSAlexey Dobriyan Btrfs is a new filesystem with extents, writable snapshotting, 13335debeeSAlexey Dobriyan support for multiple devices and many more features. 14335debeeSAlexey Dobriyan 15335debeeSAlexey Dobriyan Btrfs is highly experimental, and THE DISK FORMAT IS NOT YET 16335debeeSAlexey Dobriyan FINALIZED. You should say N here unless you are interested in 17335debeeSAlexey Dobriyan testing Btrfs with non-critical data. 18335debeeSAlexey Dobriyan 19335debeeSAlexey Dobriyan To compile this file system support as a module, choose M here. The 20335debeeSAlexey Dobriyan module will be called btrfs. 21335debeeSAlexey Dobriyan 22335debeeSAlexey Dobriyan If unsure, say N. 23bef62ef3SChristian Hesse 24bef62ef3SChristian Hesseconfig BTRFS_FS_POSIX_ACL 25bef62ef3SChristian Hesse bool "Btrfs POSIX Access Control Lists" 26bef62ef3SChristian Hesse depends on BTRFS_FS 27bef62ef3SChristian Hesse select FS_POSIX_ACL 28bef62ef3SChristian Hesse help 29bef62ef3SChristian Hesse POSIX Access Control Lists (ACLs) support permissions for users and 30bef62ef3SChristian Hesse groups beyond the owner/group/world scheme. 31bef62ef3SChristian Hesse 32bef62ef3SChristian Hesse To learn more about Access Control Lists, visit the POSIX ACLs for 33bef62ef3SChristian Hesse Linux website <http://acl.bestbits.at/>. 34bef62ef3SChristian Hesse 35bef62ef3SChristian Hesse If you don't know what Access Control Lists are, say N 36c975dd46SStefan Behrens 37c975dd46SStefan Behrensconfig BTRFS_FS_CHECK_INTEGRITY 38c975dd46SStefan Behrens bool "Btrfs with integrity check tool compiled in (DANGEROUS)" 39c975dd46SStefan Behrens depends on BTRFS_FS 40c975dd46SStefan Behrens help 41c975dd46SStefan Behrens Adds code that examines all block write requests (including 42c975dd46SStefan Behrens writes of the super block). The goal is to verify that the 43c975dd46SStefan Behrens state of the filesystem on disk is always consistent, i.e., 44c975dd46SStefan Behrens after a power-loss or kernel panic event the filesystem is 45c975dd46SStefan Behrens in a consistent state. 46c975dd46SStefan Behrens 47c975dd46SStefan Behrens If the integrity check tool is included and activated in 48c975dd46SStefan Behrens the mount options, plenty of kernel memory is used, and 49c975dd46SStefan Behrens plenty of additional CPU cycles are spent. Enabling this 50c975dd46SStefan Behrens functionality is not intended for normal use. 51c975dd46SStefan Behrens 52c975dd46SStefan Behrens In most cases, unless you are a btrfs developer who needs 53c975dd46SStefan Behrens to verify the integrity of (super)-block write requests 54c975dd46SStefan Behrens during the run of a regression test, say N 55