1335debeeSAlexey Dobriyanconfig BTRFS_FS 2aa825914SDavid Sterba tristate "Btrfs filesystem support" 39678c543SNikolay Borisov select LIBCRC32C 4335debeeSAlexey Dobriyan select ZLIB_INFLATE 5335debeeSAlexey Dobriyan select ZLIB_DEFLATE 6a6fa6faeSLi Zefan select LZO_COMPRESS 7a6fa6faeSLi Zefan select LZO_DECOMPRESS 85c1aab1dSNick Terrell select ZSTD_COMPRESS 95c1aab1dSNick Terrell select ZSTD_DECOMPRESS 1053b381b3SDavid Woodhouse select RAID6_PQ 1110e78e3aSTomasz Torcz select XOR_BLOCKS 1283fe27eaSPranith Kumar select SRCU 1353b381b3SDavid Woodhouse 14335debeeSAlexey Dobriyan help 154204617dSDavid Sterba Btrfs is a general purpose copy-on-write filesystem with extents, 164204617dSDavid Sterba writable snapshotting, support for multiple devices and many more 174204617dSDavid Sterba features focused on fault tolerance, repair and easy administration. 18335debeeSAlexey Dobriyan 194204617dSDavid Sterba The filesystem disk format is no longer unstable, and it's not 204204617dSDavid Sterba expected to change unless there are strong reasons to do so. If there 214204617dSDavid Sterba is a format change, file systems with a unchanged format will 224204617dSDavid Sterba continue to be mountable and usable by newer kernels. 234204617dSDavid Sterba 244204617dSDavid Sterba For more information, please see the web pages at 254204617dSDavid Sterba http://btrfs.wiki.kernel.org. 26335debeeSAlexey Dobriyan 27335debeeSAlexey Dobriyan To compile this file system support as a module, choose M here. The 28335debeeSAlexey Dobriyan module will be called btrfs. 29335debeeSAlexey Dobriyan 30335debeeSAlexey Dobriyan If unsure, say N. 31bef62ef3SChristian Hesse 32bef62ef3SChristian Hesseconfig BTRFS_FS_POSIX_ACL 33bef62ef3SChristian Hesse bool "Btrfs POSIX Access Control Lists" 34bef62ef3SChristian Hesse depends on BTRFS_FS 35bef62ef3SChristian Hesse select FS_POSIX_ACL 36bef62ef3SChristian Hesse help 37bef62ef3SChristian Hesse POSIX Access Control Lists (ACLs) support permissions for users and 38bef62ef3SChristian Hesse groups beyond the owner/group/world scheme. 39bef62ef3SChristian Hesse 40bef62ef3SChristian Hesse If you don't know what Access Control Lists are, say N 41c975dd46SStefan Behrens 42c975dd46SStefan Behrensconfig BTRFS_FS_CHECK_INTEGRITY 43c975dd46SStefan Behrens bool "Btrfs with integrity check tool compiled in (DANGEROUS)" 44c975dd46SStefan Behrens depends on BTRFS_FS 45c975dd46SStefan Behrens help 46c975dd46SStefan Behrens Adds code that examines all block write requests (including 47c975dd46SStefan Behrens writes of the super block). The goal is to verify that the 48c975dd46SStefan Behrens state of the filesystem on disk is always consistent, i.e., 49c975dd46SStefan Behrens after a power-loss or kernel panic event the filesystem is 50c975dd46SStefan Behrens in a consistent state. 51c975dd46SStefan Behrens 52c975dd46SStefan Behrens If the integrity check tool is included and activated in 53c975dd46SStefan Behrens the mount options, plenty of kernel memory is used, and 54c975dd46SStefan Behrens plenty of additional CPU cycles are spent. Enabling this 55c975dd46SStefan Behrens functionality is not intended for normal use. 56c975dd46SStefan Behrens 57c975dd46SStefan Behrens In most cases, unless you are a btrfs developer who needs 58c975dd46SStefan Behrens to verify the integrity of (super)-block write requests 59c975dd46SStefan Behrens during the run of a regression test, say N 6074255aa0SJosef Bacik 6174255aa0SJosef Bacikconfig BTRFS_FS_RUN_SANITY_TESTS 6274255aa0SJosef Bacik bool "Btrfs will run sanity tests upon loading" 6374255aa0SJosef Bacik depends on BTRFS_FS 6474255aa0SJosef Bacik help 6574255aa0SJosef Bacik This will run some basic sanity tests on the free space cache 6674255aa0SJosef Bacik code to make sure it is acting as it should. These are mostly 67a26a8746SMichael Witten regression tests and are only really interesting to btrfs 68a26a8746SMichael Witten developers. 6974255aa0SJosef Bacik 7074255aa0SJosef Bacik If unsure, say N. 7174255aa0SJosef Bacik 726d49ba1bSEric Sandeenconfig BTRFS_DEBUG 736d49ba1bSEric Sandeen bool "Btrfs debugging support" 746d49ba1bSEric Sandeen depends on BTRFS_FS 756d49ba1bSEric Sandeen help 766d49ba1bSEric Sandeen Enable run-time debugging support for the btrfs filesystem. This may 776d49ba1bSEric Sandeen enable additional and expensive checks with negative impact on 786d49ba1bSEric Sandeen performance, or export extra information via sysfs. 796d49ba1bSEric Sandeen 806d49ba1bSEric Sandeen If unsure, say N. 812e17c7c6SJosef Bacik 822e17c7c6SJosef Bacikconfig BTRFS_ASSERT 832e17c7c6SJosef Bacik bool "Btrfs assert support" 842e17c7c6SJosef Bacik depends on BTRFS_FS 852e17c7c6SJosef Bacik help 862e17c7c6SJosef Bacik Enable run-time assertion checking. This will result in panics if 872e17c7c6SJosef Bacik any of the assertions trip. This is meant for btrfs developers only. 882e17c7c6SJosef Bacik 892e17c7c6SJosef Bacik If unsure, say N. 90fd708b81SJosef Bacik 91fd708b81SJosef Bacikconfig BTRFS_FS_REF_VERIFY 92fd708b81SJosef Bacik bool "Btrfs with the ref verify tool compiled in" 93fd708b81SJosef Bacik depends on BTRFS_FS 94fd708b81SJosef Bacik default n 95fd708b81SJosef Bacik help 96fd708b81SJosef Bacik Enable run-time extent reference verification instrumentation. This 97fd708b81SJosef Bacik is meant to be used by btrfs developers for tracking down extent 98fd708b81SJosef Bacik reference problems or verifying they didn't break something. 99fd708b81SJosef Bacik 100fd708b81SJosef Bacik If unsure, say N. 101