vendor containerd/cgroups

We need to vendor in the latest containerd/cgroups for a fix related to
slice delegation and systemd <= 239. The opencontainer/runtime-spec is
brought along for the ride.

Signed-off-by: baude <bbaude@redhat.com>

Closes: #1414
Approved by: mheon

1 files changed, 46 insertions, 0 deletions

diff --git a/vendor/github.com/containerd/cgroups/cgroup.go b/vendor/github.com/containerd/cgroups/cgroup.go
index d1c36bde3..7959feb49 100644
--- a/vendor/github.com/containerd/cgroups/cgroup.go
+++ b/vendor/github.com/containerd/cgroups/cgroup.go
@@ -1,3 +1,19 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
 package cgroups
 
 import (
@@ -121,6 +137,36 @@ func (c *cgroup) add(process Process) error {
 	return nil
 }
 
+// AddTask moves the provided tasks (threads) into the new cgroup
+func (c *cgroup) AddTask(process Process) error {
+	if process.Pid <= 0 {
+		return ErrInvalidPid
+	}
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.err != nil {
+		return c.err
+	}
+	return c.addTask(process)
+}
+
+func (c *cgroup) addTask(process Process) error {
+	for _, s := range pathers(c.subsystems) {
+		p, err := c.path(s.Name())
+		if err != nil {
+			return err
+		}
+		if err := ioutil.WriteFile(
+			filepath.Join(s.Path(p), cgroupTasks),
+			[]byte(strconv.Itoa(process.Pid)),
+			defaultFilePerm,
+		); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 // Delete will remove the control group from each of the subsystems registered
 func (c *cgroup) Delete() error {
 	c.mu.Lock()