Re: [Devel] Re: [patch 05/10] add "permit user mounts in newnamespace" clone flag

[Miklos Szeredi]

> > Given the existence of shared subtrees allowing/denying this at the
> > mount
> > namespace level is silly and wrong.
> > 
> > If we need more than just the filesystem permission checks can we
> > make it a mount flag settable with mount and remount that allows
> > non-privileged users the ability to create mount points under it
> > in directories they have full read/write access to.
> 
> Also for bind-mount and remount operations the flag has to be propagated
> down its propagation tree.  Otherwise a unpriviledged mount in a shared
> mount wont get reflected in its peers and slaves, leading to unidentical
> shared-subtrees.

That's an interesting question.  Do we want shared mounts to be
totally identical, including mnt_flags?  It doesn't look as if
do_remount() guarantees that currently.

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/