mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 01:51:53 +00:00
894645546b
Pavel Machek complained that the question about supporting deprecated XFS v4 comes up even when XFS is disabled. This clearly makes no sense, so fix Kconfig. Reported-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com>
169 lines
6.3 KiB
Plaintext
169 lines
6.3 KiB
Plaintext
# 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.
|