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README

      1 ################################################################################
      2 ##                                                                            ##
      3 ## Copyright (c) International Business Machines  Corp., 2007                 ##
      4 ##                                                                            ##
      5 ## This program is free software;  you can redistribute it and#or modify      ##
      6 ## it under the terms of the GNU General Public License as published by       ##
      7 ## the Free Software Foundation; either version 2 of the License, or          ##
      8 ## (at your option) any later version.                                        ##
      9 ##                                                                            ##
     10 ## This program is distributed in the hope that it will be useful, but        ##
     11 ## WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY ##
     12 ## or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License   ##
     13 ## for more details.                                                          ##
     14 ##                                                                            ##
     15 ## You should have received a copy of the GNU General Public License          ##
     16 ## along with this program;  if not, write to the Free Software               ##
     17 ## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA    ##
     18 ##                                                                            ##
     19 ################################################################################
     20 
     21 PIDNS testcases Overview:
     22 
     23  A pid namespace is a view of particular set of tasks on the system. For processes, a process may have pid 1234 in one namespace, but have pid 1 in another.This allows processes to use process ids which are in use in other pid namespaces, without having to worry about what pids exist in other namespaces.
     24 
     25 "A process has a pid in every ancestor pid namespaces up to the initial pid namespace.  If process B is in a child namespace relative to process A, then process A will see process B by the pid which is valid in process A's pid namespace."
     26 
     27 "Another way of specifying process visibility, then is that process A will see all tasks which have a valid pid in process A's pid namespace."
     28 
     29 
     30 
     31 Testcases:
     32 
     33 1> Check the process id of container after cloning as 1.
     34 2> After creation of container the PID Namespace of the container should have the parent group id as 1 and also session id as 1.
     35 3> Create container: pass the parent namespacei id: mount /proc directory: check parent namespace id inside container: if it is exiting then PASS otherwise FAIL.
     36 
     37 Check for PIDNS enablement: from 2.6.24 kernel version.
     38