add super block extra for erasure coding

weed/pb/master_pb/seaweed.pb.go

@@ -246,6 +246,7 @@ func (*Empty) ProtoMessage()               {}
 func (*Empty) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
 
 type SuperBlockExtra struct {
+	ErasureCoding *SuperBlockExtra_ErasureCoding `protobuf:"bytes,1,opt,name=erasure_coding,json=erasureCoding" json:"erasure_coding,omitempty"`
 }
 
 func (m *SuperBlockExtra) Reset()                    { *m = SuperBlockExtra{} }
@@ -253,12 +254,54 @@ func (m *SuperBlockExtra) String() string            { return proto.CompactTextS
 func (*SuperBlockExtra) ProtoMessage()               {}
 func (*SuperBlockExtra) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
 
+func (m *SuperBlockExtra) GetErasureCoding() *SuperBlockExtra_ErasureCoding {
+	if m != nil {
+		return m.ErasureCoding
+	}
+	return nil
+}
+
+type SuperBlockExtra_ErasureCoding struct {
+	Data      uint32   `protobuf:"varint,1,opt,name=data" json:"data,omitempty"`
+	Parity    uint32   `protobuf:"varint,2,opt,name=parity" json:"parity,omitempty"`
+	VolumeIds []uint32 `protobuf:"varint,3,rep,packed,name=volume_ids,json=volumeIds" json:"volume_ids,omitempty"`
+}
+
+func (m *SuperBlockExtra_ErasureCoding) Reset()         { *m = SuperBlockExtra_ErasureCoding{} }
+func (m *SuperBlockExtra_ErasureCoding) String() string { return proto.CompactTextString(m) }
+func (*SuperBlockExtra_ErasureCoding) ProtoMessage()    {}
+func (*SuperBlockExtra_ErasureCoding) Descriptor() ([]byte, []int) {
+	return fileDescriptor0, []int{4, 0}
+}
+
+func (m *SuperBlockExtra_ErasureCoding) GetData() uint32 {
+	if m != nil {
+		return m.Data
+	}
+	return 0
+}
+
+func (m *SuperBlockExtra_ErasureCoding) GetParity() uint32 {
+	if m != nil {
+		return m.Parity
+	}
+	return 0
+}
+
+func (m *SuperBlockExtra_ErasureCoding) GetVolumeIds() []uint32 {
+	if m != nil {
+		return m.VolumeIds
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*Heartbeat)(nil), "master_pb.Heartbeat")
 	proto.RegisterType((*HeartbeatResponse)(nil), "master_pb.HeartbeatResponse")
 	proto.RegisterType((*VolumeInformationMessage)(nil), "master_pb.VolumeInformationMessage")
 	proto.RegisterType((*Empty)(nil), "master_pb.Empty")
 	proto.RegisterType((*SuperBlockExtra)(nil), "master_pb.SuperBlockExtra")
+	proto.RegisterType((*SuperBlockExtra_ErasureCoding)(nil), "master_pb.SuperBlockExtra.ErasureCoding")
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -433,40 +476,45 @@ var _Seaweed_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("seaweed.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
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+	0x04, 0x00, 0x00,
 }

weed/pb/seaweed.proto

@@ -48,4 +48,10 @@ message Empty {
 }
 
 message SuperBlockExtra {
+    message ErasureCoding {
+        uint32 data = 1;
+        uint32 parity = 2;
+        repeated uint32 volume_ids = 3;
+    }
+    ErasureCoding erasure_coding = 1;
 }