add backoff to PRUNE messages

pb/rpc.pb.go

@@ -535,6 +535,7 @@ func (m *ControlGraft) GetTopicID() string {
 type ControlPrune struct {
 	TopicID              *string     `protobuf:"bytes,1,opt,name=topicID" json:"topicID,omitempty"`
 	Peers                []*PeerInfo `protobuf:"bytes,2,rep,name=peers" json:"peers,omitempty"`
+	Backoff              *uint64     `protobuf:"varint,3,opt,name=backoff" json:"backoff,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
 	XXX_unrecognized     []byte      `json:"-"`
 	XXX_sizecache        int32       `json:"-"`
@@ -587,6 +588,13 @@ func (m *ControlPrune) GetPeers() []*PeerInfo {
 	return nil
 }
 
+func (m *ControlPrune) GetBackoff() uint64 {
+	if m != nil && m.Backoff != nil {
+		return *m.Backoff
+	}
+	return 0
+}
+
 type PeerInfo struct {
 	PeerID               []byte   `protobuf:"bytes,1,opt,name=peerID" json:"peerID,omitempty"`
 	SignedPeerRecord     []byte   `protobuf:"bytes,2,opt,name=signedPeerRecord" json:"signedPeerRecord,omitempty"`
@@ -835,48 +843,49 @@ func init() {
 func init() { proto.RegisterFile("rpc.proto", fileDescriptor_77a6da22d6a3feb1) }
 
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 }
 
 func (m *RPC) Marshal() (dAtA []byte, err error) {
@@ -1244,6 +1253,11 @@ func (m *ControlPrune) MarshalTo(dAtA []byte) (int, error) {
 			i += n
 		}
 	}
+	if m.Backoff != nil {
+		dAtA[i] = 0x18
+		i++
+		i = encodeVarintRpc(dAtA, i, uint64(*m.Backoff))
+	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
 	}
@@ -1600,6 +1614,9 @@ func (m *ControlPrune) Size() (n int) {
 			n += 1 + l + sovRpc(uint64(l))
 		}
 	}
+	if m.Backoff != nil {
+		n += 1 + sovRpc(uint64(*m.Backoff))
+	}
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -2805,6 +2822,26 @@ func (m *ControlPrune) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Backoff", wireType)
+			}
+			var v uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowRpc
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				v |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.Backoff = &v
 		default:
 			iNdEx = preIndex
 			skippy, err := skipRpc(dAtA[iNdEx:])

pb/rpc.proto

@@ -46,6 +46,7 @@ message ControlGraft {
 message ControlPrune {
 	optional string topicID = 1;
 	repeated PeerInfo peers = 2;
+	optional uint64 backoff = 3;
 }
 
 message PeerInfo {