688ea0e5a0
This patch introduces a kernel config option and a module param. Both can be used independently to turn the default value of redirect_dir on or off. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
24 lines
1.1 KiB
Text
24 lines
1.1 KiB
Text
config OVERLAY_FS
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tristate "Overlay filesystem support"
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help
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An overlay filesystem combines two filesystems - an 'upper' filesystem
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and a 'lower' filesystem. When a name exists in both filesystems, the
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object in the 'upper' filesystem is visible while the object in the
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'lower' filesystem is either hidden or, in the case of directories,
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merged with the 'upper' object.
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For more information see Documentation/filesystems/overlayfs.txt
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config OVERLAY_FS_REDIRECT_DIR
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bool "Overlayfs: turn on redirect dir feature by default"
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depends on OVERLAY_FS
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help
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If this config option is enabled then overlay filesystems will use
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redirects when renaming directories by default. In this case it is
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still possible to turn off redirects globally with the
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"redirect_dir=off" module option or on a filesystem instance basis
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with the "redirect_dir=off" mount option.
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Note, that redirects are not backward compatible. That is, mounting
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an overlay which has redirects on a kernel that doesn't support this
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feature will have unexpected results.
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