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SubjectRe: RFC: permit link(2) to work across --bind mounts ?

On Dec 28 2007 18:53, dean gaudet wrote:
>p.s. in retrospect i probably could have arranged it more like this:
>
> mount /dev/md1 $tmpmntpoint
> mount --bind $tmpmntpoint/var /var
> mount --bind $tmpmntpoint/home /home
> umount $tmpmntpoint
>
>except i can't easily specify that in fstab... and neither of the bind
>mounts would show up in df(1). seems like it wouldn't be hard to support
>this type of subtree mount though. mount(8) could support a single
>subtree mount using this technique but the second subtree mount attempt
>would fail because you can't temporarily remount the device because the
>mount point is gone.

Why is it gone?

mount /dev/md1 /tmpmnt
mount --bind /tmpmnt/var /var
mount --bind /tmpmnt/home /home

Is perfectly fine, and /tmpmnt is still alive and mounted. Additionally,
you can

umount /tmpmnt

now, which leaves only /var and /home.


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