Add version to HookState to make it json-compatible with spec State

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

libcontainer/configs/config.go

@@ -173,6 +173,9 @@ type Config struct {
 	// Hooks are a collection of actions to perform at various container lifecycle events.
 	// Hooks are not able to be marshaled to json but they are also not needed to.
 	Hooks *Hooks `json:"-"`
+
+	// Version is the version of opencontainer specification that is supported.
+	Version string `json:"version"`
 }
 
 type Hooks struct {
@@ -186,6 +189,7 @@ type Hooks struct {
 
 // HookState is the payload provided to a hook on execution.
 type HookState struct {
+	Version string `json:"version"`
 	ID      string `json:"id"`
 	Pid     int    `json:"pid"`
 	Root    string `json:"root"`

libcontainer/container_linux.go

@@ -250,6 +250,7 @@ func (c *linuxContainer) Destroy() error {
 	c.initProcess = nil
 	if c.config.Hooks != nil {
 		s := configs.HookState{
+			Version: c.config.Version,
 			ID:      c.id,
 			Root:    c.config.Rootfs,
 		}

libcontainer/process_linux.go

@@ -203,6 +203,7 @@ func (p *initProcess) start() (err error) {
 	}()
 	if p.config.Config.Hooks != nil {
 		s := configs.HookState{
+			Version: p.container.config.Version,
 			ID:      p.container.id,
 			Pid:     p.pid(),
 			Root:    p.config.Config.Rootfs,

spec.go

@@ -392,6 +392,7 @@ func createLibcontainerConfig(cgroupName string, spec *specs.LinuxSpec, rspec *s
 	config.ProcessLabel = rspec.Linux.SelinuxProcessLabel
 	config.AppArmorProfile = rspec.Linux.ApparmorProfile
 	createHooks(rspec, config)
+	config.Version = specs.Version
 	return config, nil
 }