+if (not slice_spec or not pid):
+ print "Not started: %s"%slice_name
+ exit(1)
+
+# Enter cgroups
+try:
+ for subsystem in ['cpuset','memory','blkio']:
+ open('/sys/fs/cgroup/%s/libvirt/lxc/%s/tasks'%(subsystem,slice_name),'w').write(str(os.getpid()))
+
+except:
+ print "Error assigning resources: %s"%slice_name
+ exit(1)
+
+try:
+ open('/sys/fs/cgroup/cpuacct/system/libvirtd.service/libvirt/lxc/%s/tasks'%slice_name,'w').write(str(os.getpid()))
+except:
+ print "Error assigning cpuacct: %s" % slice_name
+ exit(1)
+
+# If the slice is frozen, then we'll get an EBUSY when trying to write to the task
+# list for the freezer cgroup. Since the user couldn't do anything anyway, it's best
+# in this case to error out the shell. (an alternative would be to un-freeze it,
+# add the task, and re-freeze it)
+try:
+ f=open('/sys/fs/cgroup/freezer/libvirt/lxc/%s/tasks'%(slice_name),'w')
+ f.write(str(os.getpid()))
+ # note: we need to call f.close() explicitly, or we'll get an exception in
+ # the object destructor, which will not be caught
+ f.close()
+except:
+ print "Error adding task to freezer cgroup. Slice is probably frozen: %s" % slice_name
+ exit(1)
+
+setns.chcontext('/proc/%s/ns/uts'%pid)
+setns.chcontext('/proc/%s/ns/ipc'%pid)
+
+if (not options.netns):
+ setns.chcontext('/proc/%s/ns/net'%pid)
+
+if (not options.mntns):
+ open('/proc/lxcsu','w').write(pid)
+
+if (not options.pidns):
+ open('/proc/pidsu','w').write(pid)
+
+# cgroups is not yet LXC-safe, so we need to use the course grained access control
+# strategy of unmounting the filesystem
+
+umount_result = True
+for subsystem in ['cpuset','cpu,cpuacct','memory','devices','freezer','net_cls','blkio','perf_event']:
+ fs_path = '/sys/fs/cgroup/%s'%subsystem
+ if (not umount(fs_path)):
+ print "Error disabling cgroup access"
+ exit(1)
+
+if (not umount('/sys/fs/cgroup')):
+ print "Error disabling cgroup access"
+ exit(1)
+
+pid = os.fork()