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Is there a way to do a "bind overlay"? [LWN.net]
GhePeU · 2026-06-14 · via LWN.net comments

Is there a way to do a "bind overlay"?

Posted Jun 13, 2026 21:26 UTC (Sat) by GhePeU (subscriber, #56133)
In reply to: Is there a way to do a "bind overlay"? by champtar
Parent article: An overlayfs update

Yes, you're right. It doesn't seem to work mounting an overlay directly but I was able to make it work going through an intermediate bind mount, something like this:

mount -o bind,X-mount.idmap="b:65534:1000:1" original/ bind/

and then:

mount -t overlay overlay -o lowerdir=bind/,workdir=workdir/,upperdir=upper/ merged/