[buildd-tools-devel] Bug#488225: [Buildd-tools-devel] Bug#488225: Please support CLONE_NEWNS

[Max Kellermann]

On 2008/06/29 15:37, Roger Leigh <rleigh at whinlatter.ukfsn.org> wrote:
> Max Kellermann <max at duempel.org> writes:
> 
> > With CLONE_NEWNS (a clone()/unshare() option), schroot could make all
> > mounts local, so the main host does not see them.  The kernel would
> > automatically take care of all the cleanup involved in unmounting.  It
> > could also use pivot_root() instead of chroot().
> 
> This does sound interesting.  If we can integrate this into the
> existing setup script usage, that would be great.  However, the setup
> scripts do need to have access to the host filesystem, which might
> prevent CLONE_NEWNS from working nicely.  However, pivot_root might
> well be an answer to that; we would just need to umount the old rootfs
> after the setup scripts run.
> 
> If you had any suggestions about the best way to implement this, I
> would be happy to hear them.

Hi Roger,

it's been a while since my feature request.  I've finally written a
small piece of code that implements the option "unshare.mount".

Please pull git://gitorious.org/schroot/schroot.git ns

Tested only with "type=directory".  It does not yet use pivot_root()
instead of chroot().

Max