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+# SPDX-License-Identifier: GPL-2.0-only
+config XFS_FS
+ tristate "XFS filesystem support"
+ depends on BLOCK
+ 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_SUPPORT_V4
+ bool "Support deprecated V4 (crc=0) format"
+ depends on XFS_FS
+ default y
+ help
+ The V4 filesystem format lacks certain features that are supported
+ by the V5 format, such as metadata checksumming, strengthened
+ metadata verification, and the ability to store timestamps past the
+ year 2038. Because of this, the V4 format is deprecated. All users
+ should upgrade by backing up their files, reformatting, and restoring
+ from the backup.
+
+ Administrators and users can detect a V4 filesystem by running
+ xfs_info against a filesystem mountpoint and checking for a string
+ beginning with "crc=". If the string "crc=0" is found, the
+ filesystem is a V4 filesystem. If no such string is found, please
+ upgrade xfsprogs to the latest version and try again.
+
+ This option will become default N in September 2025. Support for the
+ V4 format will be removed entirely in September 2030. Distributors
+ can say N here to withdraw support earlier.
+
+ To continue supporting the old V4 format (crc=0), say Y.
+ To close off an attack surface, say N.
+
+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_ONLINE_REPAIR
+ bool "XFS online metadata repair support"
+ default n
+ depends on XFS_FS && XFS_ONLINE_SCRUB
+ help
+ If you say Y here you will be able to repair metadata on a
+ mounted XFS filesystem. This feature is intended to reduce
+ filesystem downtime by fixing minor problems before they cause the
+ filesystem to go down. However, it requires that the filesystem be
+ formatted with secondary metadata, such as reverse mappings and inode
+ parent pointers.
+
+ 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.