xref: /linux/fs/xfs/Kconfig (revision 1040960efaabb8e6c87633c7becbb51fc99d4b9b)
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