1config XFS_FS
2	tristate "XFS filesystem support"
3	depends on BLOCK
4	select EXPORTFS
5	help
6	  XFS is a high performance journaling filesystem which originated
7	  on the SGI IRIX platform.  It is completely multi-threaded, can
8	  support large files and large filesystems, extended attributes,
9	  variable block sizes, is extent based, and makes extensive use of
10	  Btrees (directories, extents, free space) to aid both performance
11	  and scalability.
12
13	  Refer to the documentation at <http://oss.sgi.com/projects/xfs/>
14	  for complete details.  This implementation is on-disk compatible
15	  with the IRIX version of XFS.
16
17	  To compile this file system support as a module, choose M here: the
18	  module will be called xfs.  Be aware, however, that if the file
19	  system of your root partition is compiled as a module, you'll need
20	  to use an initial ramdisk (initrd) to boot.
21
22config XFS_QUOTA
23	bool "XFS Quota support"
24	depends on XFS_FS
25	select QUOTACTL
26	help
27	  If you say Y here, you will be able to set limits for disk usage on
28	  a per user and/or a per group basis under XFS.  XFS considers quota
29	  information as filesystem metadata and uses journaling to provide a
30	  higher level guarantee of consistency.  The on-disk data format for
31	  quota is also compatible with the IRIX version of XFS, allowing a
32	  filesystem to be migrated between Linux and IRIX without any need
33	  for conversion.
34
35	  If unsure, say N.  More comprehensive documentation can be found in
36	  README.quota in the xfsprogs package.  XFS quota can be used either
37	  with or without the generic quota support enabled (CONFIG_QUOTA) -
38	  they are completely independent subsystems.
39
40config XFS_POSIX_ACL
41	bool "XFS POSIX ACL support"
42	depends on XFS_FS
43	select FS_POSIX_ACL
44	help
45	  POSIX Access Control Lists (ACLs) support permissions for users and
46	  groups beyond the owner/group/world scheme.
47
48	  To learn more about Access Control Lists, visit the POSIX ACLs for
49	  Linux website <http://acl.bestbits.at/>.
50
51	  If you don't know what Access Control Lists are, say N.
52
53config XFS_RT
54	bool "XFS Realtime subvolume support"
55	depends on XFS_FS
56	help
57	  If you say Y here you will be able to mount and use XFS filesystems
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.
66
67	  See the xfs man page in section 5 for additional information.
68
69	  If unsure, say N.
70
71config XFS_DEBUG
72	bool "XFS Debugging support (EXPERIMENTAL)"
73	depends on XFS_FS && EXPERIMENTAL
74	help
75	  Say Y here to get an XFS build with many debugging features,
76	  including ASSERT checks, function wrappers around macros,
77	  and extra sanity-checking functions in various code paths.
78
79	  Note that the resulting code will be HUGE and SLOW, and probably
80	  not useful unless you are debugging a particular problem.
81
82	  Say N unless you are an XFS developer, or you play one on TV.
83