Re: [patch 0/8] unprivileged mount syscall

Ram Pai
2007-04-11T18:28:36Z

On Wed, 2007-04-11 at 12:44 +0200, Miklos Szeredi wrote:
> > 1. clone the master namespace.
> >
> > 2. in the new namespace
> >
> > move the tree under /share/$me to /
> > for each ($user, $what, $how) {
> > move /share/$user/$what to /$what
> > if ($how == slave) {
> > make the mount tree under /$what as slave
> > }
> > }
> >
> > 3. in the new namespace make the tree under
> > /share as private and unmount /share
>
> Thanks. I get the basic idea now: the namespace itself need not be
> shared between the sessions, it is enough if "share" propagation is
> set up between the different namespaces of a user.
>
> I don't yet see either in your or Viro's description how the trees
> under /share/$USER are initialized. I guess they are recursively
> bound from /, and are made slaves.

yes. I suppose, when a userid is created one of the steps would be

mount --rbind / /share/$USER
mount --make-rslave /share/$USER
mount --make-rshared /share/$USER

RP

> Miklos