1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "XFS filesystem support"
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
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.
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.
26 bool "XFS Quota support"
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
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.
44 bool "XFS POSIX ACL support"
48 POSIX Access Control Lists (ACLs) support permissions for users and
49 groups beyond the owner/group/world scheme.
51 If you don't know what Access Control Lists are, say N.
54 bool "XFS Realtime subvolume support"
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.
67 See the xfs man page in section 5 for additional information.
71 config XFS_ONLINE_SCRUB
72 bool "XFS online metadata check support"
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.
82 This feature is considered EXPERIMENTAL. Use with caution!
84 See the xfs_scrub man page in section 8 for additional information.
88 config XFS_ONLINE_REPAIR
89 bool "XFS online metadata repair support"
91 depends on XFS_FS && XFS_ONLINE_SCRUB
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
100 This feature is considered EXPERIMENTAL. Use with caution!
102 See the xfs_scrub man page in section 8 for additional information.
107 bool "XFS Verbose Warnings"
108 depends on XFS_FS && !XFS_DEBUG
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.
116 However, similar to XFS_DEBUG, it is only advisable to use this if you
117 are debugging a particular problem.
120 bool "XFS Debugging support"
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.
127 Note that the resulting code will be HUGE and SLOW, and probably
128 not useful unless you are debugging a particular problem.
130 Say N unless you are an XFS developer, or you play one on TV.
132 config XFS_ASSERT_FATAL
133 bool "XFS fatal asserts"
135 depends on XFS_FS && XFS_DEBUG
137 Set the default DEBUG mode ASSERT failure behavior.
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
143 This behavior can be modified at runtime via sysfs.