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// Copyright 2017 4 CNI 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 main
import (
"encoding/json"
"errors"
"fmt"
"runtime"
"os/exec"
"github.com/containernetworking/cni/pkg/skel"
"github.com/containernetworking/cni/pkg/types"
"github.com/containernetworking/cni/pkg/types/current"
"github.com/containernetworking/cni/pkg/version"
"github.com/containernetworking/plugins/pkg/ipam"
)
const defaultBrName = "br-dpdk"
type NetConf struct {
types.NetConf
BrName string `json:"bridge"`
}
func init() {
// this ensures that main runs only on main thread (thread group leader).
// since namespace ops (unshare, setns) are done for a single thread, we
// must ensure that the goroutine does not jump from OS thread to thread
runtime.LockOSThread()
}
func loadNetConf(bytes []byte) (*NetConf, string, error) {
n := &NetConf{
BrName: defaultBrName,
}
if err := json.Unmarshal(bytes, n); err != nil {
return nil, "", fmt.Errorf("failed to load netconf: %v", err)
}
return n, n.CNIVersion, nil
}
func setupVhostUser(args *skel.CmdArgs, types string) error {
exec.Command("/bin/bash", "/opt/cni/bin/setup_ovsdpdk.sh", args.Netns, args.ContainerID, types).Output()
return nil
}
func cmdAdd(args *skel.CmdArgs) error {
n, cniVersion, err := loadNetConf(args.StdinData)
if err != nil {
return err
}
// run the IPAM plugin and get back the config to apply
r, err := ipam.ExecAdd(n.IPAM.Type, args.StdinData)
if err != nil {
return err
}
// Convert whatever the IPAM result was into the current Result type
result, err := current.NewResultFromResult(r)
if err != nil {
return err
}
if len(result.IPs) == 0 {
return errors.New("IPAM plugin returned missing IP config")
}
setupVhostUser(args, result.String())
return types.PrintResult(result, cniVersion)
}
func tearDownVhostUser(args *skel.CmdArgs) error {
exec.Command("/bin/bash", "/opt/cni/bin/teardown_ovsdpdk.sh", args.Netns, args.ContainerID).Output()
return nil
}
func cmdDel(args *skel.CmdArgs) error {
n, _, err := loadNetConf(args.StdinData)
if err != nil {
return err
}
if err := ipam.ExecDel(n.IPAM.Type, args.StdinData); err != nil {
return err
}
tearDownVhostUser(args)
return err
}
func main() {
skel.PluginMain(cmdAdd, cmdDel, version.All)
}
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