xref: /openbmc/linux/fs/xfs/Kconfig (revision ba61bb17)
1config XFS_FS
2	tristate "XFS filesystem support"
3	depends on BLOCK
4	depends on (64BIT || LBDAF)
5	select EXPORTFS
6	select LIBCRC32C
7	select FS_IOMAP
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
25config XFS_QUOTA
26	bool "XFS Quota support"
27	depends on XFS_FS
28	select QUOTACTL
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
43config XFS_POSIX_ACL
44	bool "XFS POSIX ACL support"
45	depends on XFS_FS
46	select FS_POSIX_ACL
47	help
48	  POSIX Access Control Lists (ACLs) support permissions for users and
49	  groups beyond the owner/group/world scheme.
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_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
88config XFS_ONLINE_REPAIR
89	bool "XFS online metadata repair support"
90	default n
91	depends on XFS_FS && XFS_ONLINE_SCRUB
92	help
93	  If you say Y here you will be able to repair metadata on a
94	  mounted XFS filesystem.  This feature is intended to reduce
95	  filesystem downtime by fixing minor problems before they cause the
96	  filesystem to go down.  However, it requires that the filesystem be
97	  formatted with secondary metadata, such as reverse mappings and inode
98	  parent pointers.
99
100	  This feature is considered EXPERIMENTAL.  Use with caution!
101
102	  See the xfs_scrub man page in section 8 for additional information.
103
104	  If unsure, say N.
105
106config XFS_WARN
107	bool "XFS Verbose Warnings"
108	depends on XFS_FS && !XFS_DEBUG
109	help
110	  Say Y here to get an XFS build with many additional warnings.
111	  It converts ASSERT checks to WARN, so will log any out-of-bounds
112	  conditions that occur that would otherwise be missed. It is much
113	  lighter weight than XFS_DEBUG and does not modify algorithms and will
114	  not cause the kernel to panic on non-fatal errors.
115
116	  However, similar to XFS_DEBUG, it is only advisable to use this if you
117	  are debugging a particular problem.
118
119config XFS_DEBUG
120	bool "XFS Debugging support"
121	depends on XFS_FS
122	help
123	  Say Y here to get an XFS build with many debugging features,
124	  including ASSERT checks, function wrappers around macros,
125	  and extra sanity-checking functions in various code paths.
126
127	  Note that the resulting code will be HUGE and SLOW, and probably
128	  not useful unless you are debugging a particular problem.
129
130	  Say N unless you are an XFS developer, or you play one on TV.
131
132config XFS_ASSERT_FATAL
133	bool "XFS fatal asserts"
134	default y
135	depends on XFS_FS && XFS_DEBUG
136	help
137	  Set the default DEBUG mode ASSERT failure behavior.
138
139	  Say Y here to cause DEBUG mode ASSERT failures to result in fatal
140	  errors that BUG() the kernel by default. If you say N, ASSERT failures
141	  result in warnings.
142
143	  This behavior can be modified at runtime via sysfs.
144