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new 'no-dereference' mount option

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Add a new `no-dereference` mount option supported by crun 1.11+ to
re-create/copy a symlink if it's the source of a mount.  By default the
kernel will resolve the symlink on the host and mount the target.
As reported in #20098, there are use cases where the symlink structure
must be preserved by all means.

Fixes: #20098
Fixes: issues.redhat.com/browse/RUN-1935
Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>
This commit is contained in:
Valentin Rothberg
2023-10-09 14:08:00 +02:00
parent 7dfbc72769
commit e40d70cecc
10 changed files with 105 additions and 10 deletions
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docs/source/markdown/options/mount.md
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@ -75,6 +75,8 @@ Current supported mount TYPEs are **bind**, **devpts**, **glob**, **image**, **r
. U, chown: true or false (default). Change recursively the owner and group of the source volume based on the UID and GID of the container.
. no-dereference: do not dereference symlinks but copy the link source into the mount destination.
Options specific to tmpfs and ramfs:
· ro, readonly: true or false (default).