Re: [PATCH 2/2] net: Implement SO_PEERCGROUP

[Vivek Goyal <vgoyal@redhat.com>]

On Thu, Mar 13, 2014 at 10:55:16AM -0700, Andy Lutomirski wrote:

[..]
> >> 2. Docker is a container system, so use the "container" (aka
> >> namespace) APIs.  There are probably several clever things that could
> >> be done with /proc/<pid>/ns.
> >
> > pid is racy, if it weren't I would simply go straight
> > to /proc/<pid>/cgroups ...
> 
> How about:
> 
> open("/proc/self/ns/ipc", O_RDONLY);
> send the result over SCM_RIGHTS?

As I don't know I will ask. So what will server now do with this file
descriptor of client's ipc namespace.

IOW, what information/identifier does it contain which can be
used to map to pre-configrued per container/per namespace policies.

Thanks
Vivek