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

[Alex Riesen <alexander.riesen@synopsys.COM>]

viro@parcelfarce.linux.theplanet.co.uk, Tue, May 06, 2003 17:02:19 +0200:
> 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:
> > > > 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.

sounds useful, even though i can't think of real example of such a use :)

Thank you, that clarifies the behaviour, at least to me.