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

On Dec 28 2007 22:02, dean gaudet wrote:
>
>i was trying to come up with a userland-only change in mount(8) which
>would behave like so:
>
># mount --subtree var /dev/md1 /var
> internally mount does:
> - mount /dev/md1 /tmpmnt
> - mount --bind /tmpmnt/var /var
> - umount /tmpmnt
>
># mount --subtree home /dev/md1 /home
> internally mount does:
> - mount /dev/md1 /tmpmnt
> - mount --bind /tmpmnt/home /home
> - umount /tmpmnt
>
>but that second mount would fail because /dev/md1 is already mounted
>(but the mount point is gone)...

I do not think it would fail. Like this:

# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/home 208486056 158605472 49880584 77% /home
# mount /dev/mapper/home /mnt
# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/home 208486056 158605472 49880584 77% /home
/dev/mapper/home 208486056 158605472 49880584 77% /mnt



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