1335debeeSAlexey Dobriyanconfig BTRFS_FS 2aa825914SDavid Sterba tristate "Btrfs filesystem support" 314a958e6SFilipe David Borba Manana select CRYPTO 414a958e6SFilipe David Borba Manana select CRYPTO_CRC32C 5335debeeSAlexey Dobriyan select ZLIB_INFLATE 6335debeeSAlexey Dobriyan select ZLIB_DEFLATE 7a6fa6faeSLi Zefan select LZO_COMPRESS 8a6fa6faeSLi Zefan select LZO_DECOMPRESS 95c1aab1dSNick Terrell select ZSTD_COMPRESS 105c1aab1dSNick Terrell select ZSTD_DECOMPRESS 1153b381b3SDavid Woodhouse select RAID6_PQ 1210e78e3aSTomasz Torcz select XOR_BLOCKS 1383fe27eaSPranith Kumar select SRCU 1453b381b3SDavid Woodhouse 15335debeeSAlexey Dobriyan help 164204617dSDavid Sterba Btrfs is a general purpose copy-on-write filesystem with extents, 174204617dSDavid Sterba writable snapshotting, support for multiple devices and many more 184204617dSDavid Sterba features focused on fault tolerance, repair and easy administration. 19335debeeSAlexey Dobriyan 204204617dSDavid Sterba The filesystem disk format is no longer unstable, and it's not 214204617dSDavid Sterba expected to change unless there are strong reasons to do so. If there 224204617dSDavid Sterba is a format change, file systems with a unchanged format will 234204617dSDavid Sterba continue to be mountable and usable by newer kernels. 244204617dSDavid Sterba 254204617dSDavid Sterba For more information, please see the web pages at 264204617dSDavid Sterba http://btrfs.wiki.kernel.org. 27335debeeSAlexey Dobriyan 28335debeeSAlexey Dobriyan To compile this file system support as a module, choose M here. The 29335debeeSAlexey Dobriyan module will be called btrfs. 30335debeeSAlexey Dobriyan 31335debeeSAlexey Dobriyan If unsure, say N. 32bef62ef3SChristian Hesse 33bef62ef3SChristian Hesseconfig BTRFS_FS_POSIX_ACL 34bef62ef3SChristian Hesse bool "Btrfs POSIX Access Control Lists" 35bef62ef3SChristian Hesse depends on BTRFS_FS 36bef62ef3SChristian Hesse select FS_POSIX_ACL 37bef62ef3SChristian Hesse help 38bef62ef3SChristian Hesse POSIX Access Control Lists (ACLs) support permissions for users and 39bef62ef3SChristian Hesse groups beyond the owner/group/world scheme. 40bef62ef3SChristian Hesse 41bef62ef3SChristian Hesse To learn more about Access Control Lists, visit the POSIX ACLs for 42bef62ef3SChristian Hesse Linux website <http://acl.bestbits.at/>. 43bef62ef3SChristian Hesse 44bef62ef3SChristian Hesse If you don't know what Access Control Lists are, say N 45c975dd46SStefan Behrens 46c975dd46SStefan Behrensconfig BTRFS_FS_CHECK_INTEGRITY 47c975dd46SStefan Behrens bool "Btrfs with integrity check tool compiled in (DANGEROUS)" 48c975dd46SStefan Behrens depends on BTRFS_FS 49c975dd46SStefan Behrens help 50c975dd46SStefan Behrens Adds code that examines all block write requests (including 51c975dd46SStefan Behrens writes of the super block). The goal is to verify that the 52c975dd46SStefan Behrens state of the filesystem on disk is always consistent, i.e., 53c975dd46SStefan Behrens after a power-loss or kernel panic event the filesystem is 54c975dd46SStefan Behrens in a consistent state. 55c975dd46SStefan Behrens 56c975dd46SStefan Behrens If the integrity check tool is included and activated in 57c975dd46SStefan Behrens the mount options, plenty of kernel memory is used, and 58c975dd46SStefan Behrens plenty of additional CPU cycles are spent. Enabling this 59c975dd46SStefan Behrens functionality is not intended for normal use. 60c975dd46SStefan Behrens 61c975dd46SStefan Behrens In most cases, unless you are a btrfs developer who needs 62c975dd46SStefan Behrens to verify the integrity of (super)-block write requests 63c975dd46SStefan Behrens during the run of a regression test, say N 6474255aa0SJosef Bacik 6574255aa0SJosef Bacikconfig BTRFS_FS_RUN_SANITY_TESTS 6674255aa0SJosef Bacik bool "Btrfs will run sanity tests upon loading" 6774255aa0SJosef Bacik depends on BTRFS_FS 6874255aa0SJosef Bacik help 6974255aa0SJosef Bacik This will run some basic sanity tests on the free space cache 7074255aa0SJosef Bacik code to make sure it is acting as it should. These are mostly 71a26a8746SMichael Witten regression tests and are only really interesting to btrfs 72a26a8746SMichael Witten developers. 7374255aa0SJosef Bacik 7474255aa0SJosef Bacik If unsure, say N. 7574255aa0SJosef Bacik 766d49ba1bSEric Sandeenconfig BTRFS_DEBUG 776d49ba1bSEric Sandeen bool "Btrfs debugging support" 786d49ba1bSEric Sandeen depends on BTRFS_FS 796d49ba1bSEric Sandeen help 806d49ba1bSEric Sandeen Enable run-time debugging support for the btrfs filesystem. This may 816d49ba1bSEric Sandeen enable additional and expensive checks with negative impact on 826d49ba1bSEric Sandeen performance, or export extra information via sysfs. 836d49ba1bSEric Sandeen 846d49ba1bSEric Sandeen If unsure, say N. 852e17c7c6SJosef Bacik 862e17c7c6SJosef Bacikconfig BTRFS_ASSERT 872e17c7c6SJosef Bacik bool "Btrfs assert support" 882e17c7c6SJosef Bacik depends on BTRFS_FS 892e17c7c6SJosef Bacik help 902e17c7c6SJosef Bacik Enable run-time assertion checking. This will result in panics if 912e17c7c6SJosef Bacik any of the assertions trip. This is meant for btrfs developers only. 922e17c7c6SJosef Bacik 932e17c7c6SJosef Bacik If unsure, say N. 94