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[19.03 backport] Fix overlay2 busy error on mount #332
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@dmcgowan @kolyshkin PTAL |
When mounting overlays which have children, enforce that the mount is always performed as read only. Newer versions of the kernel return a device busy error when a lower directory is in use as an upper directory in another overlay mount. Adds committed file to indicate when an overlay is being used as a parent, ensuring it will no longer be mounted with an upper directory. Signed-off-by: Derek McGowan <derek@mcgstyle.net> (cherry picked from commit 477bf1e) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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all green; let's merge |
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backport of moby#39780 for 19.03
When mounting overlays which have children, enforce that
the mount is always performed as read only. Newer versions
of the kernel return a device busy error when a lower directory
is in use as an upper directory in another overlay mount.
Adds committed file to indicate when an overlay is being used
as a parent, ensuring it will no longer be mounted with an
upper directory.
Related to kernel@146d62e5a586