On Tue, Apr 15, 2014 at 02:54:02PM -0700, Andy Lutomirski wrote: > On Tue, Apr 15, 2014 at 2:15 PM, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > > Implement SO_PEERCGROUP along the lines of SO_PEERCRED. This returns the > > cgroup of first mounted hierarchy of the task. For the case of client, > > it represents the cgroup of client at the time of opening the connection. > > After that client cgroup might change. > > > > This works only for unix stream sockets. > > I still don't understand why this is useful when SCM_CGROUP exists. I think this is more lightweight as compared to SCM_CGROUP. Information is stored per connection as opposed to per message. So if user space has created a system where unpriviliged processed have been locked in cgroups and they can't escape those cgroups, then SO_PEERCRED should be sufficient and one does not have to use SCM_CGROUP. Thanks Vivek -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
