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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>
42 lines
1.8 KiB
Plaintext
42 lines
1.8 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config ISO9660_FS
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tristate "ISO 9660 CDROM file system support"
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select BUFFER_HEAD
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help
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This is the standard file system used on CD-ROMs. It was previously
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known as "High Sierra File System" and is called "hsfs" on other
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Unix systems. The so-called Rock-Ridge extensions which allow for
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long Unix filenames and symbolic links are also supported by this
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driver. If you have a CD-ROM drive and want to do more with it than
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just listen to audio CDs and watch its LEDs, say Y (and read
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<file:Documentation/filesystems/isofs.rst> and the CD-ROM-HOWTO,
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available from <http://www.tldp.org/docs.html#howto>), thereby
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enlarging your kernel by about 27 KB; otherwise say N.
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To compile this file system support as a module, choose M here: the
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module will be called isofs.
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config JOLIET
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bool "Microsoft Joliet CDROM extensions"
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depends on ISO9660_FS
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select NLS
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help
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Joliet is a Microsoft extension for the ISO 9660 CD-ROM file system
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which allows for long filenames in unicode format (unicode is the
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new 16 bit character code, successor to ASCII, which encodes the
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characters of almost all languages of the world; see
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<http://www.unicode.org/> for more information). Say Y here if you
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want to be able to read Joliet CD-ROMs under Linux.
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config ZISOFS
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bool "Transparent decompression extension"
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depends on ISO9660_FS
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select ZLIB_INFLATE
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help
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This is a Linux-specific extension to RockRidge which lets you store
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data in compressed form on a CD-ROM and have it transparently
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decompressed when the CD-ROM is accessed. See
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<http://www.kernel.org/pub/linux/utils/fs/zisofs/> for the tools
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necessary to create such a filesystem. Say Y here if you want to be
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able to read such compressed CD-ROMs.
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