[linux-2.6-block.git] / fs / xfs / Kconfig

config XFS_FS
	tristate "XFS filesystem support"
	depends on BLOCK
	depends on (64BIT || LBDAF)
	select EXPORTFS
	select LIBCRC32C
	select FS_IOMAP
	help
	  XFS is a high performance journaling filesystem which originated
	  on the SGI IRIX platform.  It is completely multi-threaded, can
	  support large files and large filesystems, extended attributes,
	  variable block sizes, is extent based, and makes extensive use of
	  Btrees (directories, extents, free space) to aid both performance
	  and scalability.

	  Refer to the documentation at <http://oss.sgi.com/projects/xfs/>
	  for complete details.  This implementation is on-disk compatible
	  with the IRIX version of XFS.

	  To compile this file system support as a module, choose M here: the
	  module will be called xfs.  Be aware, however, that if the file
	  system of your root partition is compiled as a module, you'll need
	  to use an initial ramdisk (initrd) to boot.

config XFS_QUOTA
	bool "XFS Quota support"
	depends on XFS_FS
	select QUOTACTL
	help
	  If you say Y here, you will be able to set limits for disk usage on
	  a per user and/or a per group basis under XFS.  XFS considers quota
	  information as filesystem metadata and uses journaling to provide a
	  higher level guarantee of consistency.  The on-disk data format for
	  quota is also compatible with the IRIX version of XFS, allowing a
	  filesystem to be migrated between Linux and IRIX without any need
	  for conversion.

	  If unsure, say N.  More comprehensive documentation can be found in
	  README.quota in the xfsprogs package.  XFS quota can be used either
	  with or without the generic quota support enabled (CONFIG_QUOTA) -
	  they are completely independent subsystems.

config XFS_POSIX_ACL
	bool "XFS POSIX ACL support"
	depends on XFS_FS
	select FS_POSIX_ACL
	help
	  POSIX Access Control Lists (ACLs) support permissions for users and
	  groups beyond the owner/group/world scheme.

	  If you don't know what Access Control Lists are, say N.

config XFS_RT
	bool "XFS Realtime subvolume support"
	depends on XFS_FS
	help
	  If you say Y here you will be able to mount and use XFS filesystems
	  which contain a realtime subvolume.  The realtime subvolume is a
	  separate area of disk space where only file data is stored.  It was
	  originally designed to provide deterministic data rates suitable
	  for media streaming applications, but is also useful as a generic
	  mechanism for ensuring data and metadata/log I/Os are completely
	  separated.  Regular file I/Os are isolated to a separate device
	  from all other requests, and this can be done quite transparently
	  to applications via the inherit-realtime directory inode flag.

	  See the xfs man page in section 5 for additional information.

	  If unsure, say N.

config XFS_ONLINE_SCRUB
	bool "XFS online metadata check support"
	default n
	depends on XFS_FS
	help
	  If you say Y here you will be able to check metadata on a
	  mounted XFS filesystem.  This feature is intended to reduce
	  filesystem downtime by supplementing xfs_repair.  The key
	  advantage here is to look for problems proactively so that
	  they can be dealt with in a controlled manner.

	  This feature is considered EXPERIMENTAL.  Use with caution!

	  See the xfs_scrub man page in section 8 for additional information.

	  If unsure, say N.

config XFS_WARN
	bool "XFS Verbose Warnings"
	depends on XFS_FS && !XFS_DEBUG
	help
	  Say Y here to get an XFS build with many additional warnings.
	  It converts ASSERT checks to WARN, so will log any out-of-bounds
	  conditions that occur that would otherwise be missed. It is much
	  lighter weight than XFS_DEBUG and does not modify algorithms and will
	  not cause the kernel to panic on non-fatal errors.

	  However, similar to XFS_DEBUG, it is only advisable to use this if you
	  are debugging a particular problem.

config XFS_DEBUG
	bool "XFS Debugging support"
	depends on XFS_FS
	help
	  Say Y here to get an XFS build with many debugging features,
	  including ASSERT checks, function wrappers around macros,
	  and extra sanity-checking functions in various code paths.

	  Note that the resulting code will be HUGE and SLOW, and probably
	  not useful unless you are debugging a particular problem.

	  Say N unless you are an XFS developer, or you play one on TV.

config XFS_ASSERT_FATAL
	bool "XFS fatal asserts"
	default y
	depends on XFS_FS && XFS_DEBUG
	help
	  Set the default DEBUG mode ASSERT failure behavior.

	  Say Y here to cause DEBUG mode ASSERT failures to result in fatal
	  errors that BUG() the kernel by default. If you say N, ASSERT failures
	  result in warnings.

	  This behavior can be modified at runtime via sysfs.
Commit	Line	Data
1da177e4 LT	1	config XFS_FS
1da177e4 LT	2	tristate "XFS filesystem support"
9361401e	3	depends on BLOCK
d5cf09ba	4	depends on (64BIT \|\| LBDAF)
d296d30a	5	select EXPORTFS
bc02e869	6	select LIBCRC32C
68a9f5e7	7	select FS_IOMAP
1da177e4 LT	8	help
	9	XFS is a high performance journaling filesystem which originated
	10	on the SGI IRIX platform. It is completely multi-threaded, can
	11	support large files and large filesystems, extended attributes,
	12	variable block sizes, is extent based, and makes extensive use of
	13	Btrees (directories, extents, free space) to aid both performance
	14	and scalability.
	15
	16	Refer to the documentation at <http://oss.sgi.com/projects/xfs/>
	17	for complete details. This implementation is on-disk compatible
	18	with the IRIX version of XFS.
	19
	20	To compile this file system support as a module, choose M here: the
	21	module will be called xfs. Be aware, however, that if the file
	22	system of your root partition is compiled as a module, you'll need
	23	to use an initial ramdisk (initrd) to boot.
	24
1da177e4	25	config XFS_QUOTA
538524ae	26	bool "XFS Quota support"
1da177e4	27	depends on XFS_FS
80f44b15	28	select QUOTACTL
1da177e4 LT	29	help
	30	If you say Y here, you will be able to set limits for disk usage on
	31	a per user and/or a per group basis under XFS. XFS considers quota
	32	information as filesystem metadata and uses journaling to provide a
	33	higher level guarantee of consistency. The on-disk data format for
	34	quota is also compatible with the IRIX version of XFS, allowing a
	35	filesystem to be migrated between Linux and IRIX without any need
	36	for conversion.
	37
	38	If unsure, say N. More comprehensive documentation can be found in
	39	README.quota in the xfsprogs package. XFS quota can be used either
	40	with or without the generic quota support enabled (CONFIG_QUOTA) -
	41	they are completely independent subsystems.
	42
1da177e4	43	config XFS_POSIX_ACL
20ba0287	44	bool "XFS POSIX ACL support"
1da177e4	45	depends on XFS_FS
ef14f0c1	46	select FS_POSIX_ACL
1da177e4 LT	47	help
	48	POSIX Access Control Lists (ACLs) support permissions for users and
	49	groups beyond the owner/group/world scheme.
	50
1da177e4 LT	51	If you don't know what Access Control Lists are, say N.
1da177e4 LT	52
20ba0287	53	config XFS_RT
d7ede1aa NS	54	bool "XFS Realtime subvolume support"
d7ede1aa NS	55	depends on XFS_FS
20ba0287 NS	56	help
20ba0287 NS	57	If you say Y here you will be able to mount and use XFS filesystems
d7ede1aa NS	58	which contain a realtime subvolume. The realtime subvolume is a
	59	separate area of disk space where only file data is stored. It was
	60	originally designed to provide deterministic data rates suitable
	61	for media streaming applications, but is also useful as a generic
	62	mechanism for ensuring data and metadata/log I/Os are completely
	63	separated. Regular file I/Os are isolated to a separate device
	64	from all other requests, and this can be done quite transparently
	65	to applications via the inherit-realtime directory inode flag.
20ba0287	66
d7ede1aa	67	See the xfs man page in section 5 for additional information.
20ba0287 NS	68
20ba0287 NS	69	If unsure, say N.
7788fae6	70
36fd6e86 DW	71	config XFS_ONLINE_SCRUB
	72	bool "XFS online metadata check support"
	73	default n
	74	depends on XFS_FS
	75	help
	76	If you say Y here you will be able to check metadata on a
	77	mounted XFS filesystem. This feature is intended to reduce
	78	filesystem downtime by supplementing xfs_repair. The key
	79	advantage here is to look for problems proactively so that
	80	they can be dealt with in a controlled manner.
	81
	82	This feature is considered EXPERIMENTAL. Use with caution!
	83
	84	See the xfs_scrub man page in section 8 for additional information.
	85
	86	If unsure, say N.
	87
742ae1e3 DC	88	config XFS_WARN
	89	bool "XFS Verbose Warnings"
	90	depends on XFS_FS && !XFS_DEBUG
	91	help
	92	Say Y here to get an XFS build with many additional warnings.
	93	It converts ASSERT checks to WARN, so will log any out-of-bounds
	94	conditions that occur that would otherwise be missed. It is much
	95	lighter weight than XFS_DEBUG and does not modify algorithms and will
	96	not cause the kernel to panic on non-fatal errors.
	97
	98	However, similar to XFS_DEBUG, it is only advisable to use this if you
	99	are debugging a particular problem.
	100
7788fae6	101	config XFS_DEBUG
d9777b8d KC	102	bool "XFS Debugging support"
d9777b8d KC	103	depends on XFS_FS
7788fae6 CH	104	help
	105	Say Y here to get an XFS build with many debugging features,
	106	including ASSERT checks, function wrappers around macros,
	107	and extra sanity-checking functions in various code paths.
	108
	109	Note that the resulting code will be HUGE and SLOW, and probably
	110	not useful unless you are debugging a particular problem.
	111
	112	Say N unless you are an XFS developer, or you play one on TV.
1040960e BF	113
	114	config XFS_ASSERT_FATAL
	115	bool "XFS fatal asserts"
	116	default y
	117	depends on XFS_FS && XFS_DEBUG
	118	help
	119	Set the default DEBUG mode ASSERT failure behavior.
	120
	121	Say Y here to cause DEBUG mode ASSERT failures to result in fatal
	122	errors that BUG() the kernel by default. If you say N, ASSERT failures
	123	result in warnings.
	124
	125	This behavior can be modified at runtime via sysfs.