bridges: Check if this fixes netmon error

TODO: Put changes into right commits

Fixes: kata-containers#1153
Signed-off-by: Jan Schintag <jan.schintag@de.ibm.com>

virtcontainers/qemu.go

@@ -61,6 +61,7 @@ type CPUDevice struct {
 
 // QemuState keeps Qemu's state
 type QemuState struct {
+	Bridges []types.Bridge
 	// HotpluggedCPUs is the list of CPUs that were hot-added
 	HotpluggedVCPUs      []CPUDevice
 	HotpluggedMemory     int
@@ -260,6 +261,8 @@ func (q *qemu) setup(id string, hypervisorConfig *HypervisorConfig, vcStore *sto
 		if err := q.store.Load(store.Hypervisor, &q.state); err != nil {
 			// hypervisor doesn't exist, create new one
 			create = true
+		} else {
+			q.arch.setBridges(q.state.Bridges)
 		}
 	} else if q.state.UUID == "" { // new store
 		create = true
@@ -1976,6 +1979,7 @@ func (q *qemu) toGrpc() ([]byte, error) {
 
 func (q *qemu) storeState() error {
 	if q.store != nil {
+		q.state.Bridges = q.arch.getBridges()
 		if err := q.store.Store(store.Hypervisor, q.state); err != nil {
 			return err
 		}

virtcontainers/qemu_arch_base.go

@@ -106,6 +106,9 @@ type qemuArch interface {
 	// getBridges grants access to Bridges
 	getBridges() []types.Bridge
 
+	// setBridges grants access to Bridges
+	setBridges(bridges []types.Bridge)
+
 	// addBridge adds a new Bridge to the list of Bridges
 	addBridge(types.Bridge)
 
@@ -673,6 +676,10 @@ func (q *qemuArchBase) getBridges() []types.Bridge {
 	return q.Bridges
 }
 
+func (q *qemuArchBase) setBridges(bridges []types.Bridge) {
+	q.Bridges = bridges
+}
+
 func (q *qemuArchBase) addBridge(b types.Bridge) {
 	q.Bridges = append(q.Bridges, b)
 }