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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>
45 lines
1.3 KiB
Plaintext
45 lines
1.3 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config EXT2_FS
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tristate "Second extended fs support"
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select BUFFER_HEAD
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select FS_IOMAP
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select LEGACY_DIRECT_IO
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help
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Ext2 is a standard Linux file system for hard disks.
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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 ext2.
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If unsure, say Y.
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config EXT2_FS_XATTR
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bool "Ext2 extended attributes"
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depends on EXT2_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 EXT2_FS_POSIX_ACL
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bool "Ext2 POSIX Access Control Lists"
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depends on EXT2_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 EXT2_FS_SECURITY
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bool "Ext2 Security Labels"
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depends on EXT2_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 ext2 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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