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925c86a19b
Add a new config option that controls building the buffer_head code, and select it from all file systems and stacking drivers that need it. For the block device nodes and alternative iomap based buffered I/O path is provided when buffer_head support is not enabled, and iomap needs a a small tweak to define the IOMAP_F_BUFFER_HEAD flag to 0 to not call into the buffer_head code when it doesn't exist. Otherwise this is just Kconfig and ifdef changes. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20230801172201.1923299-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
91 lines
3.5 KiB
Text
91 lines
3.5 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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config REISERFS_FS
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tristate "Reiserfs support (deprecated)"
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select BUFFER_HEAD
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select CRC32
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select LEGACY_DIRECT_IO
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help
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Reiserfs is deprecated and scheduled to be removed from the kernel
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in 2025. If you are still using it, please migrate to another
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filesystem or tell us your usecase for reiserfs.
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Reiserfs stores not just filenames but the files themselves in a
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balanced tree. Uses journalling.
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Balanced trees are more efficient than traditional file system
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architectural foundations.
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In general, ReiserFS is as fast as ext2, but is very efficient with
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large directories and small files. Additional patches are needed
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for NFS and quotas, please see
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<https://reiser4.wiki.kernel.org/index.php/Main_Page> for links.
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It is more easily extended to have features currently found in
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database and keyword search systems than block allocation based file
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systems are. The next version will be so extended, and will support
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plugins consistent with our motto ``It takes more than a license to
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make source code open.''
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Read <https://reiser4.wiki.kernel.org/index.php/Main_Page>
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to learn more about reiserfs.
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Sponsored by Threshold Networks, Emusic.com, and Bigstorage.com.
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If you like it, you can pay us to add new features to it that you
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need, buy a support contract, or pay us to port it to another OS.
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config REISERFS_CHECK
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bool "Enable reiserfs debug mode"
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depends on REISERFS_FS
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help
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If you set this to Y, then ReiserFS will perform every check it can
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possibly imagine of its internal consistency throughout its
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operation. It will also go substantially slower. More than once we
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have forgotten that this was on, and then gone despondent over the
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latest benchmarks.:-) Use of this option allows our team to go all
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out in checking for consistency when debugging without fear of its
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effect on end users. If you are on the verge of sending in a bug
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report, say Y and you might get a useful error message. Almost
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everyone should say N.
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config REISERFS_PROC_INFO
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bool "Stats in /proc/fs/reiserfs"
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depends on REISERFS_FS && PROC_FS
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help
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Create under /proc/fs/reiserfs a hierarchy of files, displaying
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various ReiserFS statistics and internal data at the expense of
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making your kernel or module slightly larger (+8 KB). This also
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increases the amount of kernel memory required for each mount.
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Almost everyone but ReiserFS developers and people fine-tuning
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reiserfs or tracing problems should say N.
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config REISERFS_FS_XATTR
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bool "ReiserFS extended attributes"
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depends on REISERFS_FS
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help
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Extended attributes are name:value pairs associated with inodes by
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the kernel or by users (see the attr(5) manual page for details).
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If unsure, say N.
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config REISERFS_FS_POSIX_ACL
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bool "ReiserFS POSIX Access Control Lists"
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depends on REISERFS_FS_XATTR
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select FS_POSIX_ACL
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help
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Posix Access Control Lists (ACLs) support permissions for users and
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groups beyond the owner/group/world scheme.
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If you don't know what Access Control Lists are, say N
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config REISERFS_FS_SECURITY
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bool "ReiserFS Security Labels"
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depends on REISERFS_FS_XATTR
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help
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Security labels support alternative access control models
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implemented by security modules like SELinux. This option
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enables an extended attribute handler for file security
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labels in the ReiserFS filesystem.
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If you are not using a security module that requires using
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extended attributes for file security labels, say N.
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