Merge pull request #1325 from dmcgowan/diffid-labels

content: commit options

api/services/content/v1/content.pb.go

@@ -321,6 +321,8 @@ type WriteContentRequest struct {
 	// If this is empty and the message is not a commit, a response will be
 	// returned with the current write state.
 	Data []byte `protobuf:"bytes,6,opt,name=data,proto3" json:"data,omitempty"`
+	// Labels are arbitrary data to set on commit.
+	Labels map[string]string `protobuf:"bytes,7,rep,name=labels" json:"labels,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 }
 
 func (m *WriteContentRequest) Reset()                    { *m = WriteContentRequest{} }
@@ -1445,6 +1447,23 @@ func (m *WriteContentRequest) MarshalTo(dAtA []byte) (int, error) {
 		i = encodeVarintContent(dAtA, i, uint64(len(m.Data)))
 		i += copy(dAtA[i:], m.Data)
 	}
+	if len(m.Labels) > 0 {
+		for k, _ := range m.Labels {
+			dAtA[i] = 0x3a
+			i++
+			v := m.Labels[k]
+			mapSize := 1 + len(k) + sovContent(uint64(len(k))) + 1 + len(v) + sovContent(uint64(len(v)))
+			i = encodeVarintContent(dAtA, i, uint64(mapSize))
+			dAtA[i] = 0xa
+			i++
+			i = encodeVarintContent(dAtA, i, uint64(len(k)))
+			i += copy(dAtA[i:], k)
+			dAtA[i] = 0x12
+			i++
+			i = encodeVarintContent(dAtA, i, uint64(len(v)))
+			i += copy(dAtA[i:], v)
+		}
+	}
 	return i, nil
 }
 
@@ -1772,6 +1791,14 @@ func (m *WriteContentRequest) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovContent(uint64(l))
 	}
+	if len(m.Labels) > 0 {
+		for k, v := range m.Labels {
+			_ = k
+			_ = v
+			mapEntrySize := 1 + len(k) + sovContent(uint64(len(k))) + 1 + len(v) + sovContent(uint64(len(v)))
+			n += mapEntrySize + 1 + sovContent(uint64(mapEntrySize))
+		}
+	}
 	return n
 }
 
@@ -1998,6 +2025,16 @@ func (this *WriteContentRequest) String() string {
 	if this == nil {
 		return "nil"
 	}
+	keysForLabels := make([]string, 0, len(this.Labels))
+	for k, _ := range this.Labels {
+		keysForLabels = append(keysForLabels, k)
+	}
+	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	mapStringForLabels := "map[string]string{"
+	for _, k := range keysForLabels {
+		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
+	}
+	mapStringForLabels += "}"
 	s := strings.Join([]string{`&WriteContentRequest{`,
 		`Action:` + fmt.Sprintf("%v", this.Action) + `,`,
 		`Ref:` + fmt.Sprintf("%v", this.Ref) + `,`,
@@ -2005,6 +2042,7 @@ func (this *WriteContentRequest) String() string {
 		`Expected:` + fmt.Sprintf("%v", this.Expected) + `,`,
 		`Offset:` + fmt.Sprintf("%v", this.Offset) + `,`,
 		`Data:` + fmt.Sprintf("%v", this.Data) + `,`,
+		`Labels:` + mapStringForLabels + `,`,
 		`}`,
 	}, "")
 	return s
@@ -3827,6 +3865,122 @@ func (m *WriteContentRequest) Unmarshal(dAtA []byte) error {
 				m.Data = []byte{}
 			}
 			iNdEx = postIndex
+		case 7:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Labels", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowContent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthContent
+			}
+			postIndex := iNdEx + msglen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			var keykey uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowContent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				keykey |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			var stringLenmapkey uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowContent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLenmapkey |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLenmapkey := int(stringLenmapkey)
+			if intStringLenmapkey < 0 {
+				return ErrInvalidLengthContent
+			}
+			postStringIndexmapkey := iNdEx + intStringLenmapkey
+			if postStringIndexmapkey > l {
+				return io.ErrUnexpectedEOF
+			}
+			mapkey := string(dAtA[iNdEx:postStringIndexmapkey])
+			iNdEx = postStringIndexmapkey
+			if m.Labels == nil {
+				m.Labels = make(map[string]string)
+			}
+			if iNdEx < postIndex {
+				var valuekey uint64
+				for shift := uint(0); ; shift += 7 {
+					if shift >= 64 {
+						return ErrIntOverflowContent
+					}
+					if iNdEx >= l {
+						return io.ErrUnexpectedEOF
+					}
+					b := dAtA[iNdEx]
+					iNdEx++
+					valuekey |= (uint64(b) & 0x7F) << shift
+					if b < 0x80 {
+						break
+					}
+				}
+				var stringLenmapvalue uint64
+				for shift := uint(0); ; shift += 7 {
+					if shift >= 64 {
+						return ErrIntOverflowContent
+					}
+					if iNdEx >= l {
+						return io.ErrUnexpectedEOF
+					}
+					b := dAtA[iNdEx]
+					iNdEx++
+					stringLenmapvalue |= (uint64(b) & 0x7F) << shift
+					if b < 0x80 {
+						break
+					}
+				}
+				intStringLenmapvalue := int(stringLenmapvalue)
+				if intStringLenmapvalue < 0 {
+					return ErrInvalidLengthContent
+				}
+				postStringIndexmapvalue := iNdEx + intStringLenmapvalue
+				if postStringIndexmapvalue > l {
+					return io.ErrUnexpectedEOF
+				}
+				mapvalue := string(dAtA[iNdEx:postStringIndexmapvalue])
+				iNdEx = postStringIndexmapvalue
+				m.Labels[mapkey] = mapvalue
+			} else {
+				var mapvalue string
+				m.Labels[mapkey] = mapvalue
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipContent(dAtA[iNdEx:])
@@ -4233,72 +4387,73 @@ func init() {
 }
 
 var fileDescriptorContent = []byte{
-	// 1065 bytes of a gzipped FileDescriptorProto
+	// 1079 bytes of a gzipped FileDescriptorProto
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+	0x71, 0xed, 0x1f, 0xf0, 0x43, 0x58, 0x23, 0xdf, 0x76, 0x49, 0x8d, 0x91, 0x7a, 0x46, 0x5d, 0x38,
-	0x2e, 0x9d, 0x91, 0xa1, 0x0d, 0xe3, 0x26, 0x5c, 0x13, 0x1c, 0x05, 0x09, 0x97, 0x0e, 0xa2, 0xa1,
+	0x23, 0x03, 0x19, 0xc6, 0x75, 0xb8, 0xe2, 0xc7, 0x28, 0x48, 0xb8, 0x34, 0x10, 0x0d, 0x0c, 0xe4,
-	0x83, 0xac, 0xad, 0x02, 0x95, 0x61, 0x3d, 0xab, 0x3e, 0xbf, 0x91, 0x54, 0xbe, 0x37, 0xab, 0xa2,
+	0x6d, 0x15, 0xb0, 0x0c, 0xea, 0x59, 0xa5, 0xe2, 0x46, 0x86, 0xf2, 0xbd, 0xa8, 0x8a, 0x96, 0x78,
-	0x25, 0x5e, 0xa2, 0x8c, 0xa2, 0x68, 0x13, 0x71, 0x4b, 0xfc, 0xd9, 0x7d, 0xf5, 0x15, 0x64, 0xc6,
+	0x89, 0x32, 0x0a, 0x7e, 0x9b, 0xf8, 0xb7, 0x84, 0x46, 0xf7, 0xd5, 0xd7, 0x90, 0x1e, 0x05, 0x48,
-	0x01, 0xd2, 0x91, 0x07, 0xb0, 0xee, 0xcb, 0x3b, 0xd9, 0x5c, 0x73, 0xba, 0x22, 0xdb, 0x6b, 0x88,
+	0x43, 0xee, 0xc3, 0x1a, 0x95, 0x77, 0xb2, 0xb9, 0x66, 0x34, 0x45, 0xb6, 0xd7, 0x00, 0x6d, 0xfc,
-	0x36, 0xfe, 0x41, 0x90, 0x7e, 0xea, 0x39, 0x53, 0x2d, 0x56, 0x01, 0xd5, 0xae, 0x53, 0xc7, 0xed,
+	0xac, 0xc0, 0xe6, 0xa1, 0xe7, 0x4c, 0xb4, 0x58, 0x19, 0x54, 0xbb, 0xc6, 0x1c, 0xb7, 0x23, 0x5c,
-	0xf2, 0x50, 0xaf, 0x97, 0x6e, 0xcf, 0xb2, 0xcf, 0x8d, 0x94, 0x39, 0xc4, 0x92, 0xd0, 0x80, 0xd3,
+	0xbd, 0x5a, 0xbc, 0x19, 0x25, 0x5f, 0x08, 0x29, 0x09, 0x88, 0x25, 0xa1, 0x41, 0x4c, 0x63, 0xc3,
-	0xe8, 0x28, 0xe9, 0xc3, 0xe4, 0x2a, 0x97, 0x25, 0x37, 0x76, 0xf5, 0xe4, 0x86, 0x4a, 0x2b, 0x7e,
+	0xa4, 0x0f, 0x92, 0xab, 0x5c, 0x94, 0xdc, 0xf8, 0xe5, 0x93, 0x1b, 0x2a, 0xad, 0xc4, 0xd4, 0x6e,
-	0x61, 0xb7, 0xa8, 0xa1, 0x6e, 0x79, 0x1d, 0x85, 0xcc, 0x38, 0x01, 0x92, 0xe3, 0x95, 0x30, 0x30,
+	0x51, 0x87, 0xdd, 0x82, 0x0f, 0x07, 0xbb, 0x6f, 0x55, 0x04, 0xf2, 0x93, 0x99, 0x1c, 0x1d, 0x8d,
-	0xde, 0x80, 0xd1, 0x55, 0x34, 0xa0, 0xb2, 0x5c, 0x03, 0x2e, 0xd6, 0x6e, 0xa3, 0xf1, 0xa7, 0x5e,
+	0xd6, 0xb2, 0x57, 0xe1, 0xcb, 0x18, 0xa4, 0x47, 0xd5, 0xc8, 0xbc, 0x2f, 0x25, 0x2b, 0xa3, 0x43,
-	0x79, 0xc2, 0xea, 0xb0, 0x51, 0xae, 0xb9, 0x1e, 0xbd, 0xb4, 0xd3, 0x6e, 0x7d, 0x8f, 0x20, 0x19,
+	0x21, 0xb6, 0x8c, 0xa1, 0xa0, 0x2c, 0x36, 0x14, 0xe6, 0x1b, 0x01, 0xc3, 0x91, 0xac, 0x5e, 0x7a,
-	0x62, 0x0f, 0xbf, 0x03, 0xb1, 0xc7, 0xd5, 0x72, 0x35, 0x15, 0xd1, 0xd2, 0xc7, 0x27, 0xfa, 0x1b,
+	0xea, 0xeb, 0xb0, 0x51, 0xaa, 0xba, 0x1e, 0xbb, 0xb0, 0xfb, 0x6f, 0xfc, 0x80, 0x20, 0x19, 0x8a,
-	0xa1, 0x9f, 0x58, 0x15, 0xe3, 0x3c, 0xc4, 0x9f, 0x5a, 0xfb, 0xd5, 0xbd, 0x14, 0xd2, 0x32, 0xc7,
+	0x1e, 0x7e, 0x07, 0xe2, 0x8f, 0x2a, 0xa5, 0x4a, 0x6a, 0x45, 0xdb, 0x3c, 0x39, 0xd5, 0xdf, 0x08,
-	0x27, 0x7a, 0x2a, 0xf4, 0x3b, 0x17, 0xf1, 0x4d, 0x50, 0x2b, 0x9f, 0x1d, 0x1c, 0xec, 0x57, 0x53,
+	0x7d, 0xe2, 0x9d, 0x85, 0x73, 0x90, 0x38, 0xb4, 0xf6, 0x2b, 0x7b, 0x29, 0xa4, 0xa5, 0x4f, 0x4e,
-	0x51, 0xed, 0xad, 0xe3, 0x13, 0xfd, 0xcd, 0x90, 0x46, 0xc5, 0xed, 0x74, 0x1c, 0xaa, 0xa5, 0x7f,
+	0xf5, 0x54, 0xe8, 0xbb, 0x20, 0xf1, 0x75, 0x50, 0xcb, 0x9f, 0x1f, 0x1c, 0xec, 0x57, 0x52, 0x31,
-	0xf8, 0x39, 0x17, 0xf9, 0xf5, 0x97, 0x5c, 0xf8, 0xdd, 0xd2, 0x6f, 0x6b, 0xb0, 0x26, 0xcb, 0x00,
+	0xed, 0xad, 0x93, 0x53, 0xfd, 0xcd, 0x10, 0x47, 0xd9, 0x6d, 0xb7, 0x1d, 0xa6, 0x6d, 0xfe, 0xf8,
-	0xdb, 0xf2, 0x2b, 0xf0, 0xf6, 0x3c, 0x5b, 0x4b, 0x86, 0xa6, 0xbd, 0x3f, 0x9f, 0xb2, 0xac, 0xb0,
+	0x6b, 0x76, 0xe5, 0xf7, 0xdf, 0xb2, 0x61, 0xbd, 0xc5, 0x3f, 0x56, 0x61, 0x55, 0x96, 0x01, 0xb6,
-	0x16, 0xa8, 0x62, 0x6f, 0xe3, 0xcd, 0x59, 0xb8, 0xb1, 0xaf, 0x0d, 0xcd, 0x9c, 0x57, 0x5d, 0x3e,
+	0xe5, 0xcb, 0xf4, 0xe6, 0x2c, 0x9b, 0x54, 0xba, 0xa6, 0xbd, 0x3f, 0x1b, 0xb3, 0xac, 0xb0, 0x26,
-	0xf4, 0x02, 0x62, 0x6c, 0x8c, 0xe0, 0xd2, 0x2c, 0xdc, 0xf4, 0xd2, 0xd7, 0xb6, 0x17, 0xc2, 0x88,
+	0xa8, 0xfe, 0x5b, 0x02, 0x6f, 0x45, 0xe1, 0x46, 0x5e, 0x40, 0x9a, 0x39, 0x2b, 0xbb, 0x54, 0xf4,
-	0x07, 0xb7, 0x10, 0xfe, 0x02, 0x54, 0xb1, 0xba, 0xf1, 0xce, 0x2c, 0x03, 0x17, 0xad, 0x78, 0xed,
+	0x0c, 0xe2, 0x7c, 0xb4, 0xe1, 0x62, 0x14, 0x6e, 0xf2, 0x21, 0xa2, 0xed, 0xcc, 0x85, 0xf1, 0x15,
-	0xc6, 0x54, 0x7d, 0xef, 0xb1, 0x6f, 0x74, 0x16, 0x0a, 0xdb, 0x8f, 0xb3, 0x43, 0x99, 0xde, 0xe9,
+	0x6e, 0x23, 0xfc, 0x25, 0xa8, 0xfe, 0x73, 0x02, 0xdf, 0x8e, 0x12, 0x30, 0xed, 0xd9, 0xa1, 0x5d,
-	0xb3, 0x43, 0xb9, 0x60, 0xf3, 0x6e, 0x21, 0x96, 0x26, 0xb9, 0x4e, 0x37, 0xe7, 0x9c, 0xf7, 0xf3,
+	0x9b, 0xa8, 0xef, 0x3d, 0xfe, 0xbf, 0x81, 0xbb, 0xc2, 0x77, 0x76, 0xb4, 0x2b, 0x93, 0xef, 0x8c,
-	0xa6, 0x69, 0x62, 0xbd, 0x1c, 0xc1, 0x46, 0x78, 0xda, 0xe3, 0xb9, 0xa8, 0x9f, 0x58, 0x26, 0xda,
+	0x68, 0x57, 0xa6, 0xbc, 0x06, 0xb6, 0x11, 0x4f, 0x93, 0x5c, 0xf1, 0x5b, 0x33, 0xee, 0xa0, 0x59,
-	0xce, 0x62, 0x20, 0xf9, 0xf4, 0x00, 0xe2, 0xa2, 0x75, 0xb6, 0xe7, 0x9a, 0x72, 0x13, 0xc4, 0xee,
+	0xd3, 0x34, 0xb6, 0xf2, 0x8e, 0x61, 0x23, 0xbc, 0x81, 0xf0, 0x4c, 0xa1, 0x1f, 0x5b, 0x70, 0xda,
-	0x2c, 0x06, 0x12, 0x6f, 0x16, 0xd0, 0x16, 0xc2, 0x07, 0x10, 0xe7, 0xb3, 0x01, 0xcf, 0xec, 0x9c,
+	0xed, 0xf9, 0x40, 0x52, 0x75, 0x1f, 0x12, 0x7e, 0xeb, 0xec, 0x2c, 0x30, 0x92, 0xa3, 0x75, 0x4e,
-	0xf0, 0x08, 0xb9, 0xac, 0x3a, 0x76, 0x9f, 0x9d, 0x9e, 0xe5, 0x22, 0x7f, 0x9c, 0xe5, 0x22, 0xdf,
+	0x1b, 0xb0, 0x79, 0xb4, 0x8d, 0xf0, 0x01, 0x24, 0xc4, 0x6c, 0xc0, 0x91, 0x9d, 0x13, 0x1e, 0x21,
-	0x9d, 0xe7, 0xd0, 0xe9, 0x79, 0x0e, 0xfd, 0x7e, 0x9e, 0x43, 0x7f, 0x9d, 0xe7, 0xd0, 0xb3, 0x4f,
+	0x17, 0x55, 0xc7, 0xee, 0x93, 0xb3, 0x57, 0xd9, 0x95, 0xbf, 0x5e, 0x65, 0x57, 0xbe, 0x3f, 0xcf,
-	0x96, 0xfd, 0x9f, 0xf5, 0xae, 0x14, 0x6b, 0x2a, 0x7f, 0x6b, 0xfb, 0xdf, 0x00, 0x00, 0x00, 0xff,
+	0xa2, 0xb3, 0xf3, 0x2c, 0xfa, 0xf3, 0x3c, 0x8b, 0xfe, 0x39, 0xcf, 0xa2, 0x27, 0x9f, 0x2e, 0xfa,
-	0xff, 0x28, 0x28, 0x53, 0x76, 0xfe, 0x0e, 0x00, 0x00,
+	0x3f, 0xfa, 0x8e, 0x24, 0xab, 0xaa, 0xd0, 0xb5, 0xf3, 0x5f, 0x00, 0x00, 0x00, 0xff, 0xff, 0xbf,
+	0xc1, 0xae, 0xf1, 0x92, 0x0f, 0x00, 0x00,
 }

api/services/content/v1/content.proto

@@ -269,6 +269,9 @@ message WriteContentRequest {
 	// If this is empty and the message is not a commit, a response will be
 	// returned with the current write state.
 	bytes data = 6;
+
+	// Labels are arbitrary data to set on commit.
+	map<string, string> labels  = 7;
 }
 
 // WriteContentResponse is returned on the culmination of a write call.

content/content.go

@@ -90,7 +90,7 @@ type Writer interface {
 
 	// Commit commits the blob (but no roll-back is guaranteed on an error).
 	// size and expected can be zero-value when unknown.
-	Commit(size int64, expected digest.Digest) error
+	Commit(size int64, expected digest.Digest, opts ...Opt) error
 
 	// Status returns the current state of write
 	Status() (Status, error)
@@ -107,3 +107,13 @@ type Store interface {
 	IngestManager
 	Ingester
 }
+
+// Opt is used to alter the mutable properties of content
+type Opt func(*Info) error
+
+func WithLabels(labels map[string]string) Opt {
+	return func(info *Info) error {
+		info.Labels = labels
+		return nil
+	}
+}

content/local/store_test.go

@@ -24,12 +24,14 @@ import (
 )
 
 func TestContent(t *testing.T) {
-	testsuite.ContentSuite(t, "fs", func(ctx context.Context, root string) (content.Store, func(), error) {
+	testsuite.ContentSuite(t, "fs", func(ctx context.Context, root string) (content.Store, func() error, error) {
 		cs, err := NewStore(root)
 		if err != nil {
 			return nil, nil, err
 		}
-		return cs, func() {}, nil
+		return cs, func() error {
+			return nil
+		}, nil
 	})
 }
 

content/local/writer.go

@@ -54,7 +54,7 @@ func (w *writer) Write(p []byte) (n int, err error) {
 	return n, err
 }
 
-func (w *writer) Commit(size int64, expected digest.Digest) error {
+func (w *writer) Commit(size int64, expected digest.Digest, opts ...content.Opt) error {
 	if err := w.fp.Sync(); err != nil {
 		return errors.Wrap(err, "sync failed")
 	}

content/testsuite/testsuite.go

@@ -17,13 +17,20 @@ import (
 	"github.com/pkg/errors"
 )
 
-// ContentSuite runs a test suite on the snapshotter given a factory function.
+// ContentSuite runs a test suite on the content store given a factory function.
-func ContentSuite(t *testing.T, name string, storeFn func(ctx context.Context, root string) (content.Store, func(), error)) {
+func ContentSuite(t *testing.T, name string, storeFn func(ctx context.Context, root string) (content.Store, func() error, error)) {
 	t.Run("Writer", makeTest(t, name, storeFn, checkContentStoreWriter))
 	t.Run("UploadStatus", makeTest(t, name, storeFn, checkUploadStatus))
 }
 
-func makeTest(t *testing.T, name string, storeFn func(ctx context.Context, root string) (content.Store, func(), error), fn func(ctx context.Context, t *testing.T, cs content.Store)) func(t *testing.T) {
+// ContentLabelSuite runs a test suite for the content store supporting
+// labels.
+// TODO: Merge this with ContentSuite once all content stores support labels
+func ContentLabelSuite(t *testing.T, name string, storeFn func(ctx context.Context, root string) (content.Store, func() error, error)) {
+	t.Run("Labels", makeTest(t, name, storeFn, checkLabels))
+}
+
+func makeTest(t *testing.T, name string, storeFn func(ctx context.Context, root string) (content.Store, func() error, error), fn func(ctx context.Context, t *testing.T, cs content.Store)) func(t *testing.T) {
 	return func(t *testing.T) {
 		ctx := namespaces.WithNamespace(context.Background(), name)
 
@@ -37,7 +44,11 @@ func makeTest(t *testing.T, name string, storeFn func(ctx context.Context, root
 		if err != nil {
 			t.Fatal(err)
 		}
-		defer cleanup()
+		defer func() {
+			if err := cleanup(); err != nil && !t.Failed() {
+				t.Fatalf("Cleanup failed: %+v", err)
+			}
+		}()
 
 		defer testutil.DumpDir(t, tmpDir)
 		fn(ctx, t, cs)
@@ -200,6 +211,69 @@ func checkUploadStatus(ctx context.Context, t *testing.T, cs content.Store) {
 	}
 }
 
+func checkLabels(ctx context.Context, t *testing.T, cs content.Store) {
+	c1, d1 := createContent(256, 1)
+
+	w1, err := cs.Writer(ctx, "c1", 256, d1)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := w1.Write(c1); err != nil {
+		t.Fatalf("Failed to write: %+v", err)
+	}
+
+	labels := map[string]string{
+		"k1": "v1",
+		"k2": "v2",
+	}
+
+	preCommit := time.Now()
+	if err := w1.Commit(0, "", content.WithLabels(labels)); err != nil {
+		t.Fatalf("Commit failed: %+v", err)
+	}
+	postCommit := time.Now()
+
+	info := content.Info{
+		Digest: d1,
+		Size:   256,
+		Labels: labels,
+	}
+
+	if err := checkInfo(ctx, cs, d1, info, preCommit, postCommit, preCommit, postCommit); err != nil {
+		t.Fatalf("Check info failed: %+v", err)
+	}
+
+	labels["k1"] = "newvalue"
+	delete(labels, "k2")
+	labels["k3"] = "v3"
+
+	info.Labels = labels
+	preUpdate := time.Now()
+	if _, err := cs.Update(ctx, info); err != nil {
+		t.Fatalf("Update failed: %+v", err)
+	}
+	postUpdate := time.Now()
+
+	if err := checkInfo(ctx, cs, d1, info, preCommit, postCommit, preUpdate, postUpdate); err != nil {
+		t.Fatalf("Check info failed: %+v", err)
+	}
+
+	info.Labels = map[string]string{
+		"k1": "v1",
+	}
+	preUpdate = time.Now()
+	if _, err := cs.Update(ctx, info, "labels.k3", "labels.k1"); err != nil {
+		t.Fatalf("Update failed: %+v", err)
+	}
+	postUpdate = time.Now()
+
+	if err := checkInfo(ctx, cs, d1, info, preCommit, postCommit, preUpdate, postUpdate); err != nil {
+		t.Fatalf("Check info failed: %+v", err)
+	}
+
+}
+
 func checkStatus(w content.Writer, expected content.Status, d digest.Digest, preStart, postStart, preUpdate, postUpdate time.Time) error {
 	st, err := w.Status()
 	if err != nil {

content_test.go

@@ -0,0 +1,43 @@
+package containerd
+
+import (
+	"context"
+	"testing"
+
+	"github.com/containerd/containerd/content"
+	"github.com/containerd/containerd/content/testsuite"
+	"github.com/pkg/errors"
+)
+
+func newContentStore(ctx context.Context, root string) (content.Store, func() error, error) {
+	client, err := New(address)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	cs := client.ContentStore()
+
+	return cs, func() error {
+		statuses, err := cs.ListStatuses(ctx)
+		if err != nil {
+			return err
+		}
+		for _, st := range statuses {
+			if err := cs.Abort(ctx, st.Ref); err != nil {
+				return errors.Wrapf(err, "failed to abort %s", st.Ref)
+			}
+		}
+		return cs.Walk(ctx, func(info content.Info) error {
+			return cs.Delete(ctx, info.Digest)
+		})
+
+	}, nil
+}
+
+func TestContentClient(t *testing.T) {
+	if testing.Short() {
+		t.Skip()
+	}
+	testsuite.ContentSuite(t, "ContentClient", newContentStore)
+	testsuite.ContentLabelSuite(t, "ContentClient", newContentStore)
+}

differ/differ.go

@@ -102,7 +102,17 @@ func (s *BaseDiff) Apply(ctx context.Context, desc ocispec.Descriptor, mounts []
 }
 
 func (s *BaseDiff) DiffMounts(ctx context.Context, lower, upper []mount.Mount, media, ref string) (ocispec.Descriptor, error) {
-
+	var isCompressed bool
+	switch media {
+	case ocispec.MediaTypeImageLayer:
+	case ocispec.MediaTypeImageLayerGzip:
+		isCompressed = true
+	case "":
+		media = ocispec.MediaTypeImageLayerGzip
+		isCompressed = true
+	default:
+		return emptyDesc, errors.Errorf("unsupported diff media type: %v", media)
+	}
 	aDir, err := ioutil.TempDir("", "left-")
 	if err != nil {
 		return emptyDesc, errors.Wrap(err, "failed to create temporary directory")
@@ -130,25 +140,29 @@ func (s *BaseDiff) DiffMounts(ctx context.Context, lower, upper []mount.Mount, m
 		return emptyDesc, errors.Wrap(err, "failed to open writer")
 	}
 
-	// TODO: Validate media type
+	var opts []content.Opt
-
+	if isCompressed {
-	// TODO: Support compressed media types (link compressed to uncompressed)
+		dgstr := digest.SHA256.Digester()
-	//dgstr := digest.SHA256.Digester()
+		compressed, err := compression.CompressStream(cw, compression.Gzip)
-	//wc := &writeCounter{}
-	//compressed, err := compression.CompressStream(cw, compression.Gzip)
-	//if err != nil {
-	//	return nil, errors.Wrap(err, "failed to get compressed stream")
-	//}
-	//err = archive.WriteDiff(ctx, io.MultiWriter(compressed, dgstr.Hash(), wc), lowerDir, upperDir)
-	//compressed.Close()
-
-	err = archive.WriteDiff(ctx, cw, aDir, bDir)
 		if err != nil {
+			return emptyDesc, errors.Wrap(err, "failed to get compressed stream")
+		}
+		err = archive.WriteDiff(ctx, io.MultiWriter(compressed, dgstr.Hash()), aDir, bDir)
+		compressed.Close()
+		if err != nil {
+			return emptyDesc, errors.Wrap(err, "failed to write compressed diff")
+		}
+		opts = append(opts, content.WithLabels(map[string]string{
+			"containerd.io/uncompressed": dgstr.Digest().String(),
+		}))
+	} else {
+		if err = archive.WriteDiff(ctx, cw, aDir, bDir); err != nil {
 			return emptyDesc, errors.Wrap(err, "failed to write diff")
 		}
+	}
 
 	dgst := cw.Digest()
-	if err := cw.Commit(0, dgst); err != nil {
+	if err := cw.Commit(0, dgst, opts...); err != nil {
 		return emptyDesc, errors.Wrap(err, "failed to commit")
 	}
 

metadata/content.go

@@ -170,7 +170,7 @@ func (cs *contentStore) Delete(ctx context.Context, dgst digest.Digest) error {
 
 		// Just remove local reference, garbage collector is responsible for
 		// cleaning up on disk content
-		return getBlobsBucket(tx, ns).Delete([]byte(dgst.String()))
+		return getBlobsBucket(tx, ns).DeleteBucket([]byte(dgst.String()))
 	})
 }
 
@@ -352,7 +352,7 @@ type namespacedWriter struct {
 	db        *bolt.DB
 }
 
-func (nw *namespacedWriter) Commit(size int64, expected digest.Digest) error {
+func (nw *namespacedWriter) Commit(size int64, expected digest.Digest, opts ...content.Opt) error {
 	return nw.db.Update(func(tx *bolt.Tx) error {
 		bkt := getIngestBucket(tx, nw.namespace)
 		if bkt != nil {
@@ -360,11 +360,17 @@ func (nw *namespacedWriter) Commit(size int64, expected digest.Digest) error {
 				return err
 			}
 		}
-		return nw.commit(tx, size, expected)
+		return nw.commit(tx, size, expected, opts...)
 	})
 }
 
-func (nw *namespacedWriter) commit(tx *bolt.Tx, size int64, expected digest.Digest) error {
+func (nw *namespacedWriter) commit(tx *bolt.Tx, size int64, expected digest.Digest, opts ...content.Opt) error {
+	var base content.Info
+	for _, opt := range opts {
+		if err := opt(&base); err != nil {
+			return err
+		}
+	}
 	status, err := nw.Writer.Status()
 	if err != nil {
 		return err
@@ -400,6 +406,9 @@ func (nw *namespacedWriter) commit(tx *bolt.Tx, size int64, expected digest.Dige
 	if err := boltutil.WriteTimestamps(bkt, commitTime, commitTime); err != nil {
 		return err
 	}
+	if err := boltutil.WriteLabels(bkt, base.Labels); err != nil {
+		return err
+	}
 	if err := bkt.Put(bucketKeySize, sizeEncoded); err != nil {
 		return err
 	}

metadata/content_test.go

@@ -11,8 +11,7 @@ import (
 	"github.com/containerd/containerd/content/testsuite"
 )
 
-func TestContent(t *testing.T) {
+func createContentStore(ctx context.Context, root string) (content.Store, func() error, error) {
-	testsuite.ContentSuite(t, "metadata", func(ctx context.Context, root string) (content.Store, func(), error) {
 	// TODO: Use mocked or in-memory store
 	cs, err := local.NewStore(root)
 	if err != nil {
@@ -24,8 +23,12 @@ func TestContent(t *testing.T) {
 		return nil, nil, err
 	}
 
-		return NewContentStore(db, cs), func() {
+	return NewContentStore(db, cs), func() error {
-			db.Close()
+		return db.Close()
 	}, nil
-	})
+}
+
+func TestContent(t *testing.T) {
+	testsuite.ContentSuite(t, "metadata", createContentStore)
+	testsuite.ContentLabelSuite(t, "metadata", createContentStore)
 }

remotes/docker/pusher.go

@@ -215,7 +215,7 @@ func (pw *pushWriter) Digest() digest.Digest {
 	return pw.expected
 }
 
-func (pw *pushWriter) Commit(size int64, expected digest.Digest) error {
+func (pw *pushWriter) Commit(size int64, expected digest.Digest, opts ...content.Opt) error {
 	// Check whether read has already thrown an error
 	if _, err := pw.pipe.Write([]byte{}); err != nil && err != io.ErrClosedPipe {
 		return errors.Wrap(err, "pipe error before commit")

rootfs/diff.go

@@ -49,5 +49,5 @@ func Diff(ctx context.Context, snapshotID, contentRef string, sn snapshot.Snapsh
 		defer sn.Remove(ctx, lowerKey)
 	}
 
-	return md.DiffMounts(ctx, lower, upper, ocispec.MediaTypeImageLayer, contentRef)
+	return md.DiffMounts(ctx, lower, upper, ocispec.MediaTypeImageLayerGzip, contentRef)
 }

services/content/service.go

@@ -420,7 +420,11 @@ func (s *Service) Write(session api.Content_WriteServer) (err error) {
 			}
 
 			if req.Action == api.WriteActionCommit {
-				if err := wr.Commit(total, expected); err != nil {
+				var opts []content.Opt
+				if req.Labels != nil {
+					opts = append(opts, content.WithLabels(req.Labels))
+				}
+				if err := wr.Commit(total, expected, opts...); err != nil {
 					return err
 				}
 			}

services/content/writer.go

@@ -46,6 +46,7 @@ func (rw *remoteWriter) Status() (content.Status, error) {
 	return content.Status{
 		Ref:       rw.ref,
 		Offset:    resp.Offset,
+		Total:     resp.Total,
 		StartedAt: resp.StartedAt,
 		UpdatedAt: resp.UpdatedAt,
 	}, nil
@@ -79,12 +80,19 @@ func (rw *remoteWriter) Write(p []byte) (n int, err error) {
 	return
 }
 
-func (rw *remoteWriter) Commit(size int64, expected digest.Digest) error {
+func (rw *remoteWriter) Commit(size int64, expected digest.Digest, opts ...content.Opt) error {
+	var base content.Info
+	for _, opt := range opts {
+		if err := opt(&base); err != nil {
+			return err
+		}
+	}
 	resp, err := rw.send(&contentapi.WriteContentRequest{
 		Action:   contentapi.WriteActionCommit,
 		Total:    size,
 		Offset:   rw.offset,
 		Expected: expected,
+		Labels:   base.Labels,
 	})
 	if err != nil {
 		return errdefs.FromGRPC(err)