golang, docker in main iproute2 verbump

hardware/virtualization/docker/files/cgroupfs-mount

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+#!/bin/sh
+# Copyright 2011 Canonical, Inc
+#           2014 Tianon Gravi
+# Author: Serge Hallyn <serge.hallyn@canonical.com>
+#         Tianon Gravi <admwiggin@gmail.com>
+set -e
+
+# for simplicity this script provides no flexibility
+
+# if cgroup is mounted by fstab, don't run
+# don't get too smart - bail on any uncommented entry with 'cgroup' in it
+if grep -v '^#' /etc/fstab | grep -q cgroup; then
+	echo 'cgroups mounted from fstab, not mounting /sys/fs/cgroup'
+	exit 0
+fi
+
+# kernel provides cgroups?
+if [ ! -e /proc/cgroups ]; then
+	exit 0
+fi
+
+# if we don't even have the directory we need, something else must be wrong
+if [ ! -d /sys/fs/cgroup ]; then
+	exit 0
+fi
+
+# mount /sys/fs/cgroup if not already done
+if ! mountpoint -q /sys/fs/cgroup; then
+	mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
+fi
+
+cd /sys/fs/cgroup
+
+# get/mount list of enabled cgroup controllers
+for sys in $(awk '!/^#/ { if ($4 == 1) print $1 }' /proc/cgroups); do
+	mkdir -p $sys
+	if ! mountpoint -q $sys; then
+		if ! mount -n -t cgroup -o $sys cgroup $sys; then
+			rmdir $sys || true
+		fi
+	fi
+done
+
+# example /proc/cgroups:
+#  #subsys_name	hierarchy	num_cgroups	enabled
+#  cpuset	2	3	1
+#  cpu	3	3	1
+#  cpuacct	4	3	1
+#  memory	5	3	0
+#  devices	6	3	1
+#  freezer	7	3	1
+#  blkio	8	3	1
+
+exit 0