Re: Fwd: allow rename to "--bind"-mounted filesystem

viro
2003-05-06T14:49:56Z

On Tue, May 06, 2003 at 04:34:59PM +0200, Alex Riesen wrote:
> viro@parcelfarce.linux.theplanet.co.uk, Tue, May 06, 2003 16:30:26 +0200:
> > On Tue, May 06, 2003 at 12:04:35PM +0200, Alex Riesen wrote:
> > > Hi,
> > > i just came over this patch, and wondered why is it missing
> > > in both 2.4 and 2.5 (the code in do_rename is identical in both
> > > kernels).
> > >
> > > Are such renames really not allowed, or was it just fixed differently?
> >
> > Such remames are _deliberately_ not allowed.
> >
>
> because that would be against semantics of a mounted filesystem?
> (which, in turn, would break something)

Binding a subtree creates a sandbox of sorts. You can bind a bunch of
subtrees of the same fs into namespace and have normal protection
against rename and link between them.