11da177e4SLinus Torvaldsconfig XFS_FS 21da177e4SLinus Torvalds tristate "XFS filesystem support" 39361401eSDavid Howells depends on BLOCK 4d5cf09baSChristoph Hellwig depends on (64BIT || LBDAF) 5d296d30aSChristoph Hellwig select EXPORTFS 6bc02e869SChristoph Hellwig select LIBCRC32C 768a9f5e7SChristoph Hellwig select FS_IOMAP 81da177e4SLinus Torvalds help 91da177e4SLinus Torvalds XFS is a high performance journaling filesystem which originated 101da177e4SLinus Torvalds on the SGI IRIX platform. It is completely multi-threaded, can 111da177e4SLinus Torvalds support large files and large filesystems, extended attributes, 121da177e4SLinus Torvalds variable block sizes, is extent based, and makes extensive use of 131da177e4SLinus Torvalds Btrees (directories, extents, free space) to aid both performance 141da177e4SLinus Torvalds and scalability. 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds Refer to the documentation at <http://oss.sgi.com/projects/xfs/> 171da177e4SLinus Torvalds for complete details. This implementation is on-disk compatible 181da177e4SLinus Torvalds with the IRIX version of XFS. 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds To compile this file system support as a module, choose M here: the 211da177e4SLinus Torvalds module will be called xfs. Be aware, however, that if the file 221da177e4SLinus Torvalds system of your root partition is compiled as a module, you'll need 231da177e4SLinus Torvalds to use an initial ramdisk (initrd) to boot. 241da177e4SLinus Torvalds 251da177e4SLinus Torvaldsconfig XFS_QUOTA 26538524aeSNathan Scott bool "XFS Quota support" 271da177e4SLinus Torvalds depends on XFS_FS 2880f44b15SJan Kara select QUOTACTL 291da177e4SLinus Torvalds help 301da177e4SLinus Torvalds If you say Y here, you will be able to set limits for disk usage on 311da177e4SLinus Torvalds a per user and/or a per group basis under XFS. XFS considers quota 321da177e4SLinus Torvalds information as filesystem metadata and uses journaling to provide a 331da177e4SLinus Torvalds higher level guarantee of consistency. The on-disk data format for 341da177e4SLinus Torvalds quota is also compatible with the IRIX version of XFS, allowing a 351da177e4SLinus Torvalds filesystem to be migrated between Linux and IRIX without any need 361da177e4SLinus Torvalds for conversion. 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds If unsure, say N. More comprehensive documentation can be found in 391da177e4SLinus Torvalds README.quota in the xfsprogs package. XFS quota can be used either 401da177e4SLinus Torvalds with or without the generic quota support enabled (CONFIG_QUOTA) - 411da177e4SLinus Torvalds they are completely independent subsystems. 421da177e4SLinus Torvalds 431da177e4SLinus Torvaldsconfig XFS_POSIX_ACL 4420ba0287SNathan Scott bool "XFS POSIX ACL support" 451da177e4SLinus Torvalds depends on XFS_FS 46ef14f0c1SChristoph Hellwig select FS_POSIX_ACL 471da177e4SLinus Torvalds help 481da177e4SLinus Torvalds POSIX Access Control Lists (ACLs) support permissions for users and 491da177e4SLinus Torvalds groups beyond the owner/group/world scheme. 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds To learn more about Access Control Lists, visit the POSIX ACLs for 521da177e4SLinus Torvalds Linux website <http://acl.bestbits.at/>. 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds If you don't know what Access Control Lists are, say N. 551da177e4SLinus Torvalds 5620ba0287SNathan Scottconfig XFS_RT 57d7ede1aaSNathan Scott bool "XFS Realtime subvolume support" 58d7ede1aaSNathan Scott depends on XFS_FS 5920ba0287SNathan Scott help 6020ba0287SNathan Scott If you say Y here you will be able to mount and use XFS filesystems 6120ba0287SNathan Scott which contain a realtime subvolume. The realtime subvolume is a 62d7ede1aaSNathan Scott separate area of disk space where only file data is stored. It was 63d7ede1aaSNathan Scott originally designed to provide deterministic data rates suitable 64d7ede1aaSNathan Scott for media streaming applications, but is also useful as a generic 65d7ede1aaSNathan Scott mechanism for ensuring data and metadata/log I/Os are completely 66d7ede1aaSNathan Scott separated. Regular file I/Os are isolated to a separate device 67d7ede1aaSNathan Scott from all other requests, and this can be done quite transparently 68d7ede1aaSNathan Scott to applications via the inherit-realtime directory inode flag. 6920ba0287SNathan Scott 70d7ede1aaSNathan Scott See the xfs man page in section 5 for additional information. 7120ba0287SNathan Scott 7220ba0287SNathan Scott If unsure, say N. 737788fae6SChristoph Hellwig 74742ae1e3SDave Chinnerconfig XFS_WARN 75742ae1e3SDave Chinner bool "XFS Verbose Warnings" 76742ae1e3SDave Chinner depends on XFS_FS && !XFS_DEBUG 77742ae1e3SDave Chinner help 78742ae1e3SDave Chinner Say Y here to get an XFS build with many additional warnings. 79742ae1e3SDave Chinner It converts ASSERT checks to WARN, so will log any out-of-bounds 80742ae1e3SDave Chinner conditions that occur that would otherwise be missed. It is much 81742ae1e3SDave Chinner lighter weight than XFS_DEBUG and does not modify algorithms and will 82742ae1e3SDave Chinner not cause the kernel to panic on non-fatal errors. 83742ae1e3SDave Chinner 84742ae1e3SDave Chinner However, similar to XFS_DEBUG, it is only advisable to use this if you 85742ae1e3SDave Chinner are debugging a particular problem. 86742ae1e3SDave Chinner 877788fae6SChristoph Hellwigconfig XFS_DEBUG 88d9777b8dSKees Cook bool "XFS Debugging support" 89d9777b8dSKees Cook depends on XFS_FS 907788fae6SChristoph Hellwig help 917788fae6SChristoph Hellwig Say Y here to get an XFS build with many debugging features, 927788fae6SChristoph Hellwig including ASSERT checks, function wrappers around macros, 937788fae6SChristoph Hellwig and extra sanity-checking functions in various code paths. 947788fae6SChristoph Hellwig 957788fae6SChristoph Hellwig Note that the resulting code will be HUGE and SLOW, and probably 967788fae6SChristoph Hellwig not useful unless you are debugging a particular problem. 977788fae6SChristoph Hellwig 987788fae6SChristoph Hellwig Say N unless you are an XFS developer, or you play one on TV. 99*1040960eSBrian Foster 100*1040960eSBrian Fosterconfig XFS_ASSERT_FATAL 101*1040960eSBrian Foster bool "XFS fatal asserts" 102*1040960eSBrian Foster default y 103*1040960eSBrian Foster depends on XFS_FS && XFS_DEBUG 104*1040960eSBrian Foster help 105*1040960eSBrian Foster Set the default DEBUG mode ASSERT failure behavior. 106*1040960eSBrian Foster 107*1040960eSBrian Foster Say Y here to cause DEBUG mode ASSERT failures to result in fatal 108*1040960eSBrian Foster errors that BUG() the kernel by default. If you say N, ASSERT failures 109*1040960eSBrian Foster result in warnings. 110*1040960eSBrian Foster 111*1040960eSBrian Foster This behavior can be modified at runtime via sysfs. 112