Re: Union mount and lockdep design issues

[Miklos Szeredi]

Michal Suchanek <hramrach@xxxxxxxxxx> writes:

> You can still do
>
> mount --bind /lower1 /lower2/lower1
> mount --bind /lower2 /lower1/lower2
>
> Which is technically not against usage guidelines, unlike mount --bind
> /upper /lower1/upper

Overlayfs will take the directory you specify as upperdir and lowerdir
and will clone those mounts internally.

This means that any present or future submounts are ignored and the
mount containting those directories may be moved or umounted and
overlayfs will still function.

None of the bind mounts above will have any effect on an overlayfs that
uses /lower[12] and /upper.

> If crossing mount boundaries is forbidden try with symlinks or hardlinks.

I'm not sure what you mean here.

Thanks,
Miklos
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/