flannel/pkg/ns/ns.go

// Copyright 2017 flannel 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 ns

import (
	"runtime"
	"testing"

	"github.com/vishvananda/netns"
)

func SetUpNetlinkTest(t *testing.T) func() {
	// new temporary namespace so we don't pollute the host
	// lock thread since the namespace is thread local
	runtime.LockOSThread()
	var err error
	ns, err := netns.New()
	if err != nil {
		t.Fatalf("Failed to create newns: %v", err)
	}

	return func() {
		ns.Close()
		runtime.UnlockOSThread()
	}
}