Update containerd.

Signed-off-by: Lantao Liu <lantaol@google.com>

vendor.conf

@@ -4,11 +4,11 @@ github.com/boltdb/bolt e9cf4fae01b5a8ff89d0ec6b32f0d9c9f79aefdd
 github.com/BurntSushi/toml a368813c5e648fee92e5f6c30e3944ff9d5e8895
 github.com/containerd/cgroups fe281dd265766145e943a034aa41086474ea6130
 github.com/containerd/console cb7008ab3d8359b78c5f464cb7cf160107ad5925
-github.com/containerd/containerd v1.1.0-rc.1
+github.com/containerd/containerd v1.1.0-rc.2
 github.com/containerd/continuity 3e8f2ea4b190484acb976a5b378d373429639a1a
 github.com/containerd/fifo 3d5202aec260678c48179c56f40e6f38a095738c
-github.com/containerd/go-runc bcb223a061a3dd7de1a89c0b402a60f4dd9bd307
 github.com/containerd/go-cni f2d7272f12d045b16ed924f50e91f9f9cecc55a7
+github.com/containerd/go-runc bcb223a061a3dd7de1a89c0b402a60f4dd9bd307
 github.com/containerd/typeurl f6943554a7e7e88b3c14aad190bf05932da84788
 github.com/containernetworking/cni v0.6.0
 github.com/containernetworking/plugins v0.7.0
@@ -23,7 +23,8 @@ github.com/docker/spdystream 449fdfce4d962303d702fec724ef0ad181c92528
 github.com/emicklei/go-restful ff4f55a206334ef123e4f79bbf348980da81ca46
 github.com/ghodss/yaml 73d445a93680fa1a78ae23a5839bad48f32ba1ee
 github.com/godbus/dbus c7fdd8b5cd55e87b4e1f4e372cdb1db61dd6c66f
-github.com/gogo/protobuf v0.5
+github.com/gogo/googleapis 08a7655d27152912db7aaf4f983275eaf8d128ef
+github.com/gogo/protobuf v1.0.0
 github.com/golang/glog 44145f04b68cf362d9c4df2182967c2275eaefed
 github.com/golang/protobuf 1643683e1b54a9e88ad26d98f81400c8c9d9f4f9
 github.com/google/gofuzz 44d81051d367757e1c7c6a5a86423ece9afcf63c
@@ -54,14 +55,14 @@ github.com/stretchr/testify v1.1.4
 github.com/syndtr/gocapability db04d3cc01c8b54962a58ec7e491717d06cfcc16
 github.com/tchap/go-patricia 5ad6cdb7538b0097d5598c7e57f0a24072adf7dc
 github.com/urfave/cli 7bc6a0acffa589f415f88aca16cc1de5ffd66f9c
+golang.org/x/crypto 49796115aa4b964c318aad4f3084fdb41e9aa067
 golang.org/x/net 7dcfb8076726a3fdd9353b6b8a1f1b6be6811bd6
 golang.org/x/sync 450f422ab23cf9881c94e2db30cac0eb1b7cf80c
 golang.org/x/sys 314a259e304ff91bd6985da2a7149bbf91237993 https://github.com/golang/sys
 golang.org/x/text 19e51611da83d6be54ddafce4a4af510cb3e9ea4
 golang.org/x/time f51c12702a4d776e4c1fa9b0fabab841babae631
-golang.org/x/crypto 49796115aa4b964c318aad4f3084fdb41e9aa067
 google.golang.org/genproto d80a6e20e776b0b17a324d0ba1ab50a39c8e8944
-google.golang.org/grpc v1.7.4
+google.golang.org/grpc v1.10.1
 gopkg.in/inf.v0 3887ee99ecf07df5b447e9b00d9c0b2adaa9f3e4
 gopkg.in/yaml.v2 53feefa2559fb8dfa8d81baad31be332c97d6c77
 k8s.io/api 7e796de92438aede7cb5d6bcf6c10f4fa65db560

vendor/github.com/containerd/containerd/api/events/container.pb.go

@@ -48,11 +48,11 @@ import google_protobuf "github.com/gogo/protobuf/types"
 // skipping weak import gogoproto "github.com/gogo/protobuf/gogoproto"
 // skipping weak import containerd_plugin "github.com/containerd/containerd/protobuf/plugin"
 
-import github_com_containerd_typeurl "github.com/containerd/typeurl"
+import typeurl "github.com/containerd/typeurl"
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -153,7 +153,7 @@ func (m *ContainerCreate_Runtime) Field(fieldpath []string) (string, bool) {
 	case "name":
 		return string(m.Name), len(m.Name) > 0
 	case "options":
-		decoded, err := github_com_containerd_typeurl.UnmarshalAny(m.Options)
+		decoded, err := typeurl.UnmarshalAny(m.Options)
 		if err != nil {
 			return "", false
 		}
@@ -478,7 +478,7 @@ func (this *ContainerUpdate) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])

vendor/github.com/containerd/containerd/api/events/image.pb.go

@@ -11,7 +11,7 @@ import math "math"
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -291,7 +291,7 @@ func (this *ImageCreate) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -312,7 +312,7 @@ func (this *ImageUpdate) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])

vendor/github.com/containerd/containerd/api/events/namespace.pb.go

@@ -12,7 +12,7 @@ import math "math"
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -292,7 +292,7 @@ func (this *NamespaceCreate) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -313,7 +313,7 @@ func (this *NamespaceUpdate) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])

vendor/github.com/containerd/containerd/api/events/task.pb.go

@@ -15,7 +15,7 @@ import containerd_types "github.com/containerd/containerd/api/types"
 
 import time "time"
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
@@ -468,8 +468,8 @@ func (m *TaskDelete) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x22
 	i++
-	i = encodeVarintTask(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)))
+	i = encodeVarintTask(dAtA, i, uint64(types.SizeOfStdTime(m.ExitedAt)))
-	n2, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
+	n2, err := types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -562,8 +562,8 @@ func (m *TaskExit) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x2a
 	i++
-	i = encodeVarintTask(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)))
+	i = encodeVarintTask(dAtA, i, uint64(types.SizeOfStdTime(m.ExitedAt)))
-	n3, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
+	n3, err := types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -804,7 +804,7 @@ func (m *TaskDelete) Size() (n int) {
 	if m.ExitStatus != 0 {
 		n += 1 + sovTask(uint64(m.ExitStatus))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)
+	l = types.SizeOfStdTime(m.ExitedAt)
 	n += 1 + l + sovTask(uint64(l))
 	return n
 }
@@ -847,7 +847,7 @@ func (m *TaskExit) Size() (n int) {
 	if m.ExitStatus != 0 {
 		n += 1 + sovTask(uint64(m.ExitStatus))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)
+	l = types.SizeOfStdTime(m.ExitedAt)
 	n += 1 + l + sovTask(uint64(l))
 	return n
 }
@@ -1518,7 +1518,7 @@ func (m *TaskDelete) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -1851,7 +1851,7 @@ func (m *TaskExit) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/api/services/containers/v1/containers.pb.go

@@ -33,16 +33,14 @@ import _ "github.com/gogo/protobuf/types"
 
 import time "time"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -516,16 +514,16 @@ func (m *Container) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x42
 	i++
-	i = encodeVarintContainers(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)))
+	i = encodeVarintContainers(dAtA, i, uint64(types.SizeOfStdTime(m.CreatedAt)))
-	n3, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
+	n3, err := types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
 	i += n3
 	dAtA[i] = 0x4a
 	i++
-	i = encodeVarintContainers(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
+	i = encodeVarintContainers(dAtA, i, uint64(types.SizeOfStdTime(m.UpdatedAt)))
-	n4, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
+	n4, err := types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -888,9 +886,9 @@ func (m *Container) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovContainers(uint64(l))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)
+	l = types.SizeOfStdTime(m.CreatedAt)
 	n += 1 + l + sovContainers(uint64(l))
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)
+	l = types.SizeOfStdTime(m.UpdatedAt)
 	n += 1 + l + sovContainers(uint64(l))
 	if len(m.Extensions) > 0 {
 		for k, v := range m.Extensions {
@@ -1027,7 +1025,7 @@ func (this *Container) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -1037,7 +1035,7 @@ func (this *Container) String() string {
 	for k, _ := range this.Extensions {
 		keysForExtensions = append(keysForExtensions, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForExtensions)
+	sortkeys.Strings(keysForExtensions)
 	mapStringForExtensions := "map[string]google_protobuf1.Any{"
 	for _, k := range keysForExtensions {
 		mapStringForExtensions += fmt.Sprintf("%v: %v,", k, this.Extensions[k])
@@ -1523,7 +1521,7 @@ func (m *Container) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -1553,7 +1551,7 @@ func (m *Container) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/api/services/content/v1/content.pb.go

@@ -41,16 +41,14 @@ import google_protobuf3 "github.com/gogo/protobuf/types"
 import github_com_opencontainers_go_digest "github.com/opencontainers/go-digest"
 import time "time"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -936,16 +934,16 @@ func (m *Info) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x1a
 	i++
-	i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)))
+	i = encodeVarintContent(dAtA, i, uint64(types.SizeOfStdTime(m.CreatedAt)))
-	n1, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
+	n1, err := types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
 	i += n1
 	dAtA[i] = 0x22
 	i++
-	i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
+	i = encodeVarintContent(dAtA, i, uint64(types.SizeOfStdTime(m.UpdatedAt)))
-	n2, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
+	n2, err := types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -1249,16 +1247,16 @@ func (m *Status) MarshalTo(dAtA []byte) (int, error) {
 	_ = l
 	dAtA[i] = 0xa
 	i++
-	i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)))
+	i = encodeVarintContent(dAtA, i, uint64(types.SizeOfStdTime(m.StartedAt)))
-	n7, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.StartedAt, dAtA[i:])
+	n7, err := types.StdTimeMarshalTo(m.StartedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
 	i += n7
 	dAtA[i] = 0x12
 	i++
-	i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
+	i = encodeVarintContent(dAtA, i, uint64(types.SizeOfStdTime(m.UpdatedAt)))
-	n8, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
+	n8, err := types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -1493,16 +1491,16 @@ func (m *WriteContentResponse) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x12
 	i++
-	i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)))
+	i = encodeVarintContent(dAtA, i, uint64(types.SizeOfStdTime(m.StartedAt)))
-	n10, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.StartedAt, dAtA[i:])
+	n10, err := types.StdTimeMarshalTo(m.StartedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
 	i += n10
 	dAtA[i] = 0x1a
 	i++
-	i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
+	i = encodeVarintContent(dAtA, i, uint64(types.SizeOfStdTime(m.UpdatedAt)))
-	n11, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
+	n11, err := types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -1569,9 +1567,9 @@ func (m *Info) Size() (n int) {
 	if m.Size_ != 0 {
 		n += 1 + sovContent(uint64(m.Size_))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)
+	l = types.SizeOfStdTime(m.CreatedAt)
 	n += 1 + l + sovContent(uint64(l))
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)
+	l = types.SizeOfStdTime(m.UpdatedAt)
 	n += 1 + l + sovContent(uint64(l))
 	if len(m.Labels) > 0 {
 		for k, v := range m.Labels {
@@ -1688,9 +1686,9 @@ func (m *ReadContentResponse) Size() (n int) {
 func (m *Status) Size() (n int) {
 	var l int
 	_ = l
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)
+	l = types.SizeOfStdTime(m.StartedAt)
 	n += 1 + l + sovContent(uint64(l))
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)
+	l = types.SizeOfStdTime(m.UpdatedAt)
 	n += 1 + l + sovContent(uint64(l))
 	l = len(m.Ref)
 	if l > 0 {
@@ -1794,9 +1792,9 @@ func (m *WriteContentResponse) Size() (n int) {
 	if m.Action != 0 {
 		n += 1 + sovContent(uint64(m.Action))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)
+	l = types.SizeOfStdTime(m.StartedAt)
 	n += 1 + l + sovContent(uint64(l))
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)
+	l = types.SizeOfStdTime(m.UpdatedAt)
 	n += 1 + l + sovContent(uint64(l))
 	if m.Offset != 0 {
 		n += 1 + sovContent(uint64(m.Offset))
@@ -1842,7 +1840,7 @@ func (this *Info) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -2015,7 +2013,7 @@ func (this *WriteContentRequest) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -2169,7 +2167,7 @@ func (m *Info) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -2199,7 +2197,7 @@ func (m *Info) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -3205,7 +3203,7 @@ func (m *Status) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.StartedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.StartedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -3235,7 +3233,7 @@ func (m *Status) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -4066,7 +4064,7 @@ func (m *WriteContentResponse) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.StartedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.StartedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -4096,7 +4094,7 @@ func (m *WriteContentResponse) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/api/services/diff/v1/diff.pb.go

@@ -23,14 +23,12 @@ import math "math"
 import containerd_types "github.com/containerd/containerd/api/types"
 import containerd_types1 "github.com/containerd/containerd/api/types"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -507,7 +505,7 @@ func (this *DiffRequest) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])

vendor/github.com/containerd/containerd/api/services/events/v1/events.pb.go

@@ -27,14 +27,12 @@ import _ "github.com/gogo/protobuf/types"
 
 import time "time"
 
-import github_com_containerd_typeurl "github.com/containerd/typeurl"
+import typeurl "github.com/containerd/typeurl"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
@@ -110,7 +108,7 @@ func (m *Envelope) Field(fieldpath []string) (string, bool) {
 	case "topic":
 		return string(m.Topic), len(m.Topic) > 0
 	case "event":
-		decoded, err := github_com_containerd_typeurl.UnmarshalAny(m.Event)
+		decoded, err := typeurl.UnmarshalAny(m.Event)
 		if err != nil {
 			return "", false
 		}
@@ -434,8 +432,8 @@ func (m *Envelope) MarshalTo(dAtA []byte) (int, error) {
 	_ = l
 	dAtA[i] = 0xa
 	i++
-	i = encodeVarintEvents(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.Timestamp)))
+	i = encodeVarintEvents(dAtA, i, uint64(types.SizeOfStdTime(m.Timestamp)))
-	n3, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.Timestamp, dAtA[i:])
+	n3, err := types.StdTimeMarshalTo(m.Timestamp, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -513,7 +511,7 @@ func (m *SubscribeRequest) Size() (n int) {
 func (m *Envelope) Size() (n int) {
 	var l int
 	_ = l
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.Timestamp)
+	l = types.SizeOfStdTime(m.Timestamp)
 	n += 1 + l + sovEvents(uint64(l))
 	l = len(m.Namespace)
 	if l > 0 {
@@ -924,7 +922,7 @@ func (m *Envelope) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.Timestamp, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.Timestamp, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/api/services/images/v1/images.pb.go

@@ -33,16 +33,14 @@ import containerd_types "github.com/containerd/containerd/api/types"
 
 import time "time"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -455,16 +453,16 @@ func (m *Image) MarshalTo(dAtA []byte) (int, error) {
 	i += n1
 	dAtA[i] = 0x3a
 	i++
-	i = encodeVarintImages(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)))
+	i = encodeVarintImages(dAtA, i, uint64(types.SizeOfStdTime(m.CreatedAt)))
-	n2, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
+	n2, err := types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
 	i += n2
 	dAtA[i] = 0x42
 	i++
-	i = encodeVarintImages(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
+	i = encodeVarintImages(dAtA, i, uint64(types.SizeOfStdTime(m.UpdatedAt)))
-	n3, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
+	n3, err := types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -761,9 +759,9 @@ func (m *Image) Size() (n int) {
 	}
 	l = m.Target.Size()
 	n += 1 + l + sovImages(uint64(l))
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)
+	l = types.SizeOfStdTime(m.CreatedAt)
 	n += 1 + l + sovImages(uint64(l))
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)
+	l = types.SizeOfStdTime(m.UpdatedAt)
 	n += 1 + l + sovImages(uint64(l))
 	return n
 }
@@ -882,7 +880,7 @@ func (this *Image) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -1230,7 +1228,7 @@ func (m *Image) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -1260,7 +1258,7 @@ func (m *Image) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/api/services/introspection/v1/introspection.pb.go

@@ -18,18 +18,16 @@ import proto "github.com/gogo/protobuf/proto"
 import fmt "fmt"
 import math "math"
 import containerd_types "github.com/containerd/containerd/api/types"
-import google_rpc "github.com/containerd/containerd/protobuf/google/rpc"
+import google_rpc "github.com/gogo/googleapis/google/rpc"
 
 // skipping weak import gogoproto "github.com/gogo/protobuf/gogoproto"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -460,7 +458,7 @@ func (this *Plugin) String() string {
 	for k, _ := range this.Exports {
 		keysForExports = append(keysForExports, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForExports)
+	sortkeys.Strings(keysForExports)
 	mapStringForExports := "map[string]string{"
 	for _, k := range keysForExports {
 		mapStringForExports += fmt.Sprintf("%v: %v,", k, this.Exports[k])

vendor/github.com/containerd/containerd/api/services/leases/v1/leases.pb.go

@@ -27,16 +27,14 @@ import _ "github.com/gogo/protobuf/types"
 
 import time "time"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -290,8 +288,8 @@ func (m *Lease) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x12
 	i++
-	i = encodeVarintLeases(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)))
+	i = encodeVarintLeases(dAtA, i, uint64(types.SizeOfStdTime(m.CreatedAt)))
-	n1, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
+	n1, err := types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -488,7 +486,7 @@ func (m *Lease) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovLeases(uint64(l))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)
+	l = types.SizeOfStdTime(m.CreatedAt)
 	n += 1 + l + sovLeases(uint64(l))
 	if len(m.Labels) > 0 {
 		for k, v := range m.Labels {
@@ -584,7 +582,7 @@ func (this *Lease) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -606,7 +604,7 @@ func (this *CreateRequest) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -751,7 +749,7 @@ func (m *Lease) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/api/services/namespaces/v1/namespace.pb.go

@@ -29,14 +29,12 @@ import math "math"
 import google_protobuf1 "github.com/gogo/protobuf/types"
 import google_protobuf2 "github.com/gogo/protobuf/types"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -787,7 +785,7 @@ func (this *Namespace) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])

vendor/github.com/containerd/containerd/api/services/snapshots/v1/snapshots.pb.go

@@ -40,16 +40,14 @@ import containerd_types "github.com/containerd/containerd/api/types"
 
 import time "time"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
 import io "io"
 
@@ -1027,16 +1025,16 @@ func (m *Info) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x22
 	i++
-	i = encodeVarintSnapshots(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)))
+	i = encodeVarintSnapshots(dAtA, i, uint64(types.SizeOfStdTime(m.CreatedAt)))
-	n1, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
+	n1, err := types.StdTimeMarshalTo(m.CreatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
 	i += n1
 	dAtA[i] = 0x2a
 	i++
-	i = encodeVarintSnapshots(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
+	i = encodeVarintSnapshots(dAtA, i, uint64(types.SizeOfStdTime(m.UpdatedAt)))
-	n2, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
+	n2, err := types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -1446,9 +1444,9 @@ func (m *Info) Size() (n int) {
 	if m.Kind != 0 {
 		n += 1 + sovSnapshots(uint64(m.Kind))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.CreatedAt)
+	l = types.SizeOfStdTime(m.CreatedAt)
 	n += 1 + l + sovSnapshots(uint64(l))
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)
+	l = types.SizeOfStdTime(m.UpdatedAt)
 	n += 1 + l + sovSnapshots(uint64(l))
 	if len(m.Labels) > 0 {
 		for k, v := range m.Labels {
@@ -1562,7 +1560,7 @@ func (this *PrepareSnapshotRequest) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -1595,7 +1593,7 @@ func (this *ViewSnapshotRequest) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -1660,7 +1658,7 @@ func (this *CommitSnapshotRequest) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -1694,7 +1692,7 @@ func (this *Info) String() string {
 	for k, _ := range this.Labels {
 		keysForLabels = append(keysForLabels, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForLabels)
+	sortkeys.Strings(keysForLabels)
 	mapStringForLabels := "map[string]string{"
 	for _, k := range keysForLabels {
 		mapStringForLabels += fmt.Sprintf("%v: %v,", k, this.Labels[k])
@@ -3257,7 +3255,7 @@ func (m *Info) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.CreatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -3287,7 +3285,7 @@ func (m *Info) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.UpdatedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/api/services/tasks/v1/tasks.pb.go

@@ -54,12 +54,10 @@ import _ "github.com/gogo/protobuf/types"
 import time "time"
 import github_com_opencontainers_go_digest "github.com/opencontainers/go-digest"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
@@ -1198,8 +1196,8 @@ func (m *DeleteResponse) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x22
 	i++
-	i = encodeVarintTasks(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)))
+	i = encodeVarintTasks(dAtA, i, uint64(types.SizeOfStdTime(m.ExitedAt)))
-	n3, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
+	n3, err := types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -1881,8 +1879,8 @@ func (m *WaitResponse) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x12
 	i++
-	i = encodeVarintTasks(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)))
+	i = encodeVarintTasks(dAtA, i, uint64(types.SizeOfStdTime(m.ExitedAt)))
-	n8, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
+	n8, err := types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -1997,7 +1995,7 @@ func (m *DeleteResponse) Size() (n int) {
 	if m.ExitStatus != 0 {
 		n += 1 + sovTasks(uint64(m.ExitStatus))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)
+	l = types.SizeOfStdTime(m.ExitedAt)
 	n += 1 + l + sovTasks(uint64(l))
 	return n
 }
@@ -2288,7 +2286,7 @@ func (m *WaitResponse) Size() (n int) {
 	if m.ExitStatus != 0 {
 		n += 1 + sovTasks(uint64(m.ExitStatus))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)
+	l = types.SizeOfStdTime(m.ExitedAt)
 	n += 1 + l + sovTasks(uint64(l))
 	return n
 }
@@ -3375,7 +3373,7 @@ func (m *DeleteResponse) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -5572,7 +5570,7 @@ func (m *WaitResponse) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/api/services/version/v1/version.pb.go

@@ -19,10 +19,8 @@ import google_protobuf "github.com/gogo/protobuf/types"
 
 // skipping weak import gogoproto "github.com/gogo/protobuf/gogoproto"
 
-import (
+import context "golang.org/x/net/context"
-	context "golang.org/x/net/context"
+import grpc "google.golang.org/grpc"
-	grpc "google.golang.org/grpc"
-)
 
 import strings "strings"
 import reflect "reflect"

vendor/github.com/containerd/containerd/api/types/metrics.pb.go

@@ -13,7 +13,7 @@ import _ "github.com/gogo/protobuf/types"
 
 import time "time"
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types1 "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
@@ -56,8 +56,8 @@ func (m *Metric) MarshalTo(dAtA []byte) (int, error) {
 	_ = l
 	dAtA[i] = 0xa
 	i++
-	i = encodeVarintMetrics(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.Timestamp)))
+	i = encodeVarintMetrics(dAtA, i, uint64(types1.SizeOfStdTime(m.Timestamp)))
-	n1, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.Timestamp, dAtA[i:])
+	n1, err := types1.StdTimeMarshalTo(m.Timestamp, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -93,7 +93,7 @@ func encodeVarintMetrics(dAtA []byte, offset int, v uint64) int {
 func (m *Metric) Size() (n int) {
 	var l int
 	_ = l
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.Timestamp)
+	l = types1.SizeOfStdTime(m.Timestamp)
 	n += 1 + l + sovMetrics(uint64(l))
 	l = len(m.ID)
 	if l > 0 {
@@ -194,7 +194,7 @@ func (m *Metric) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.Timestamp, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types1.StdTimeUnmarshal(&m.Timestamp, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/api/types/task/task.pb.go

@@ -23,7 +23,7 @@ import google_protobuf2 "github.com/gogo/protobuf/types"
 
 import time "time"
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
@@ -182,8 +182,8 @@ func (m *Process) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x52
 	i++
-	i = encodeVarintTask(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)))
+	i = encodeVarintTask(dAtA, i, uint64(types.SizeOfStdTime(m.ExitedAt)))
-	n1, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
+	n1, err := types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -268,7 +268,7 @@ func (m *Process) Size() (n int) {
 	if m.ExitStatus != 0 {
 		n += 1 + sovTask(uint64(m.ExitStatus))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)
+	l = types.SizeOfStdTime(m.ExitedAt)
 	n += 1 + l + sovTask(uint64(l))
 	return n
 }
@@ -614,7 +614,7 @@ func (m *Process) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/client.go

@@ -23,6 +23,7 @@ import (
 	"net/http"
 	"runtime"
 	"strconv"
+	"sync"
 	"time"
 
 	containersapi "github.com/containerd/containerd/api/services/containers/v1"
@@ -148,6 +149,7 @@ func NewWithConn(conn *grpc.ClientConn, opts ...ClientOpt) (*Client, error) {
 // using a uniform interface
 type Client struct {
 	services
+	connMu    sync.Mutex
 	conn      *grpc.ClientConn
 	runtime   string
 	connector func() (*grpc.ClientConn, error)
@@ -158,6 +160,8 @@ func (c *Client) Reconnect() error {
 	if c.connector == nil {
 		return errors.New("unable to reconnect to containerd, no connector available")
 	}
+	c.connMu.Lock()
+	defer c.connMu.Unlock()
 	c.conn.Close()
 	conn, err := c.connector()
 	if err != nil {
@@ -174,9 +178,12 @@ func (c *Client) Reconnect() error {
 // connection. A timeout can be set in the context to ensure it returns
 // early.
 func (c *Client) IsServing(ctx context.Context) (bool, error) {
+	c.connMu.Lock()
 	if c.conn == nil {
+		c.connMu.Unlock()
 		return false, errors.New("no grpc connection available")
 	}
+	c.connMu.Unlock()
 	r, err := c.HealthService().Check(ctx, &grpc_health_v1.HealthCheckRequest{}, grpc.FailFast(false))
 	if err != nil {
 		return false, err
@@ -424,7 +431,12 @@ func (c *Client) Subscribe(ctx context.Context, filters ...string) (ch <-chan *e
 
 // Close closes the clients connection to containerd
 func (c *Client) Close() error {
-	return c.conn.Close()
+	c.connMu.Lock()
+	defer c.connMu.Unlock()
+	if c.conn != nil {
+		return c.conn.Close()
+	}
+	return nil
 }
 
 // NamespaceService returns the underlying Namespaces Store
@@ -524,9 +536,12 @@ type Version struct {
 
 // Version returns the version of containerd that the client is connected to
 func (c *Client) Version(ctx context.Context) (Version, error) {
+	c.connMu.Lock()
 	if c.conn == nil {
+		c.connMu.Unlock()
 		return Version{}, errors.New("no grpc connection available")
 	}
+	c.connMu.Unlock()
 	response, err := c.VersionService().Version(ctx, &ptypes.Empty{})
 	if err != nil {
 		return Version{}, err

vendor/github.com/containerd/containerd/image.go

@@ -53,6 +53,14 @@ type Image interface {
 
 var _ = (Image)(&image{})
 
+// NewImage returns a client image object from the metadata image
+func NewImage(client *Client, i images.Image) Image {
+	return &image{
+		client: client,
+		i:      i,
+	}
+}
+
 type image struct {
 	client *Client
 

vendor/github.com/containerd/containerd/linux/shim/v1/shim.pb.go

@@ -44,13 +44,13 @@ import containerd_v1_types "github.com/containerd/containerd/api/types/task"
 
 import time "time"
 
-import github_com_gogo_protobuf_types "github.com/gogo/protobuf/types"
+import types "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
 
 import context "context"
-import github_com_stevvooe_ttrpc "github.com/stevvooe/ttrpc"
+import ttrpc "github.com/stevvooe/ttrpc"
 
 import io "io"
 
@@ -429,8 +429,8 @@ func (m *DeleteResponse) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x1a
 	i++
-	i = encodeVarintShim(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)))
+	i = encodeVarintShim(dAtA, i, uint64(types.SizeOfStdTime(m.ExitedAt)))
-	n2, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
+	n2, err := types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -672,8 +672,8 @@ func (m *StateResponse) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x52
 	i++
-	i = encodeVarintShim(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)))
+	i = encodeVarintShim(dAtA, i, uint64(types.SizeOfStdTime(m.ExitedAt)))
-	n4, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
+	n4, err := types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -992,8 +992,8 @@ func (m *WaitResponse) MarshalTo(dAtA []byte) (int, error) {
 	}
 	dAtA[i] = 0x12
 	i++
-	i = encodeVarintShim(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)))
+	i = encodeVarintShim(dAtA, i, uint64(types.SizeOfStdTime(m.ExitedAt)))
-	n7, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
+	n7, err := types.StdTimeMarshalTo(m.ExitedAt, dAtA[i:])
 	if err != nil {
 		return 0, err
 	}
@@ -1079,7 +1079,7 @@ func (m *DeleteResponse) Size() (n int) {
 	if m.ExitStatus != 0 {
 		n += 1 + sovShim(uint64(m.ExitStatus))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)
+	l = types.SizeOfStdTime(m.ExitedAt)
 	n += 1 + l + sovShim(uint64(l))
 	return n
 }
@@ -1190,7 +1190,7 @@ func (m *StateResponse) Size() (n int) {
 	if m.ExitStatus != 0 {
 		n += 1 + sovShim(uint64(m.ExitStatus))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)
+	l = types.SizeOfStdTime(m.ExitedAt)
 	n += 1 + l + sovShim(uint64(l))
 	return n
 }
@@ -1318,7 +1318,7 @@ func (m *WaitResponse) Size() (n int) {
 	if m.ExitStatus != 0 {
 		n += 1 + sovShim(uint64(m.ExitStatus))
 	}
-	l = github_com_gogo_protobuf_types.SizeOfStdTime(m.ExitedAt)
+	l = types.SizeOfStdTime(m.ExitedAt)
 	n += 1 + l + sovShim(uint64(l))
 	return n
 }
@@ -1597,8 +1597,8 @@ type ShimService interface {
 	Wait(ctx context.Context, req *WaitRequest) (*WaitResponse, error)
 }
 
-func RegisterShimService(srv *github_com_stevvooe_ttrpc.Server, svc ShimService) {
+func RegisterShimService(srv *ttrpc.Server, svc ShimService) {
-	srv.Register("containerd.runtime.linux.shim.v1.Shim", map[string]github_com_stevvooe_ttrpc.Method{
+	srv.Register("containerd.runtime.linux.shim.v1.Shim", map[string]ttrpc.Method{
 		"State": func(ctx context.Context, unmarshal func(interface{}) error) (interface{}, error) {
 			var req StateRequest
 			if err := unmarshal(&req); err != nil {
@@ -1715,10 +1715,10 @@ func RegisterShimService(srv *github_com_stevvooe_ttrpc.Server, svc ShimService)
 }
 
 type shimClient struct {
-	client *github_com_stevvooe_ttrpc.Client
+	client *ttrpc.Client
 }
 
-func NewShimClient(client *github_com_stevvooe_ttrpc.Client) ShimService {
+func NewShimClient(client *ttrpc.Client) ShimService {
 	return &shimClient{
 		client: client,
 	}
@@ -2379,7 +2379,7 @@ func (m *DeleteResponse) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -3225,7 +3225,7 @@ func (m *StateResponse) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -4221,7 +4221,7 @@ func (m *WaitResponse) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := github_com_gogo_protobuf_types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
+			if err := types.StdTimeUnmarshal(&m.ExitedAt, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex

vendor/github.com/containerd/containerd/metadata/containers.go

@@ -164,19 +164,11 @@ func (s *containerStore) Update(ctx context.Context, container containers.Contai
 
 	if len(fieldpaths) == 0 {
 		// only allow updates to these field on full replace.
-		fieldpaths = []string{"labels", "spec", "extensions"}
+		fieldpaths = []string{"labels", "spec", "extensions", "image", "snapshotkey"}
 
 		// Fields that are immutable must cause an error when no field paths
 		// are provided. This allows these fields to become mutable in the
 		// future.
-		if updated.Image != container.Image {
-			return containers.Container{}, errors.Wrapf(errdefs.ErrInvalidArgument, "container.Image field is immutable")
-		}
-
-		if updated.SnapshotKey != container.SnapshotKey {
-			return containers.Container{}, errors.Wrapf(errdefs.ErrInvalidArgument, "container.SnapshotKey field is immutable")
-		}
-
 		if updated.Snapshotter != container.Snapshotter {
 			return containers.Container{}, errors.Wrapf(errdefs.ErrInvalidArgument, "container.Snapshotter field is immutable")
 		}
@@ -215,6 +207,10 @@ func (s *containerStore) Update(ctx context.Context, container containers.Contai
 			updated.Spec = container.Spec
 		case "extensions":
 			updated.Extensions = container.Extensions
+		case "image":
+			updated.Image = container.Image
+		case "snapshotkey":
+			updated.SnapshotKey = container.SnapshotKey
 		default:
 			return containers.Container{}, errors.Wrapf(errdefs.ErrInvalidArgument, "cannot update %q field on %q", path, container.ID)
 		}

vendor/github.com/containerd/containerd/metadata/gc.go

@@ -17,6 +17,7 @@
 package metadata
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	"strings"
@@ -345,7 +346,10 @@ func sendSnapshotRefs(ns string, bkt *bolt.Bucket, fn func(gc.Node)) error {
 		lc := lbkt.Cursor()
 
 		for k, v := lc.Seek(labelGCSnapRef); k != nil && strings.HasPrefix(string(k), string(labelGCSnapRef)); k, v = lc.Next() {
-			snapshotter := string(k[len(labelGCSnapRef):])
+			snapshotter := k[len(labelGCSnapRef):]
+			if i := bytes.IndexByte(snapshotter, '/'); i >= 0 {
+				snapshotter = snapshotter[:i]
+			}
 			fn(gcnode(ResourceSnapshot, ns, fmt.Sprintf("%s/%s", snapshotter, v)))
 		}
 	}
@@ -361,8 +365,8 @@ func sendContentRefs(ns string, bkt *bolt.Bucket, fn func(gc.Node)) error {
 		labelRef := string(labelGCContentRef)
 		for k, v := lc.Seek(labelGCContentRef); k != nil && strings.HasPrefix(string(k), labelRef); k, v = lc.Next() {
 			if ks := string(k); ks != labelRef {
-				// Allow reference naming, ignore names
+				// Allow reference naming separated by . or /, ignore names
-				if ks[len(labelRef)] != '.' {
+				if ks[len(labelRef)] != '.' && ks[len(labelRef)] != '/' {
 					continue
 				}
 			}

vendor/github.com/containerd/containerd/protobuf/google/rpc/README.md

@@ -1,18 +0,0 @@
-This package copies definitions used with GRPC to represent error conditions
-within GRPC data types. These files are licensed under the provisions outlined
-at the top of each file.
-
-## `containerd`
-
-This is moved from the [googleapis
-project](https://github.com/googleapis/googleapis/tree/master/google/rpc) to
-allow us to regenerate these types for use with gogoprotobuf. We can move this
-away if google can generate these sensibly.
-
-These files were imported from changes after
-7f47d894837ac1701ee555fd5c3d70e5d4a796b1. Updates should not be required.
-
-The other option is to get these into an upstream project, like gogoprotobuf.
-
-Note that the `go_package` option has been changed so that they generate
-correctly in a common package in the containerd project.

vendor/github.com/containerd/containerd/protobuf/google/rpc/doc.go

@@ -1,17 +0,0 @@
-/*
-   Copyright The containerd Authors.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
-
-package rpc

vendor/github.com/containerd/containerd/remotes/docker/resolver.go

@@ -27,6 +27,7 @@ import (
 	"path"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/containerd/containerd/images"
@@ -253,12 +254,12 @@ func (r *dockerResolver) Pusher(ctx context.Context, ref string) (remotes.Pusher
 type dockerBase struct {
 	refspec reference.Spec
 	base    url.URL
-	token   string
 
-	client   *http.Client
+	client           *http.Client
-	useBasic bool
+	useBasic         bool
-	username string
+	username, secret string
-	secret   string
+	token            string
+	mu               sync.Mutex
 }
 
 func (r *dockerResolver) base(refspec reference.Spec) (*dockerBase, error) {
@@ -300,6 +301,23 @@ func (r *dockerResolver) base(refspec reference.Spec) (*dockerBase, error) {
 	}, nil
 }
 
+func (r *dockerBase) getToken() string {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	return r.token
+}
+
+func (r *dockerBase) setToken(token string) bool {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	changed := r.token != token
+	r.token = token
+
+	return changed
+}
+
 func (r *dockerBase) url(ps ...string) string {
 	url := r.base
 	url.Path = path.Join(url.Path, path.Join(ps...))
@@ -307,10 +325,11 @@ func (r *dockerBase) url(ps ...string) string {
 }
 
 func (r *dockerBase) authorize(req *http.Request) {
+	token := r.getToken()
 	if r.useBasic {
 		req.SetBasicAuth(r.username, r.secret)
-	} else if r.token != "" {
+	} else if token != "" {
-		req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", r.token))
+		req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
 	}
 }
 
@@ -358,7 +377,7 @@ func (r *dockerBase) retryRequest(ctx context.Context, req *http.Request, respon
 		for _, c := range parseAuthHeader(last.Header) {
 			if c.scheme == bearerAuth {
 				if err := invalidAuthorization(c, responses); err != nil {
-					r.token = ""
+					r.setToken("")
 					return nil, err
 				}
 				if err := r.setTokenAuth(ctx, c.parameters); err != nil {
@@ -443,19 +462,22 @@ func (r *dockerBase) setTokenAuth(ctx context.Context, params map[string]string)
 	if len(to.scopes) == 0 {
 		return errors.Errorf("no scope specified for token auth challenge")
 	}
+
+	var token string
 	if r.secret != "" {
 		// Credential information is provided, use oauth POST endpoint
-		r.token, err = r.fetchTokenWithOAuth(ctx, to)
+		token, err = r.fetchTokenWithOAuth(ctx, to)
 		if err != nil {
 			return errors.Wrap(err, "failed to fetch oauth token")
 		}
 	} else {
 		// Do request anonymously
-		r.token, err = r.getToken(ctx, to)
+		token, err = r.fetchToken(ctx, to)
 		if err != nil {
 			return errors.Wrap(err, "failed to fetch anonymous token")
 		}
 	}
+	r.setToken(token)
 
 	return nil
 }
@@ -500,7 +522,7 @@ func (r *dockerBase) fetchTokenWithOAuth(ctx context.Context, to tokenOptions) (
 	// As of September 2017, GCR is known to return 404.
 	// As of February 2018, JFrog Artifactory is known to return 401.
 	if (resp.StatusCode == 405 && r.username != "") || resp.StatusCode == 404 || resp.StatusCode == 401 {
-		return r.getToken(ctx, to)
+		return r.fetchToken(ctx, to)
 	} else if resp.StatusCode < 200 || resp.StatusCode >= 400 {
 		b, _ := ioutil.ReadAll(io.LimitReader(resp.Body, 64000)) // 64KB
 		log.G(ctx).WithFields(logrus.Fields{
@@ -530,7 +552,7 @@ type getTokenResponse struct {
 }
 
 // getToken fetches a token using a GET request
-func (r *dockerBase) getToken(ctx context.Context, to tokenOptions) (string, error) {
+func (r *dockerBase) fetchToken(ctx context.Context, to tokenOptions) (string, error) {
 	req, err := http.NewRequest("GET", to.realm, nil)
 	if err != nil {
 		return "", err

vendor/github.com/containerd/containerd/services/introspection/service.go

@@ -22,7 +22,7 @@ import (
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/filters"
 	"github.com/containerd/containerd/plugin"
-	"github.com/containerd/containerd/protobuf/google/rpc"
+	"github.com/gogo/googleapis/google/rpc"
 	ptypes "github.com/gogo/protobuf/types"
 	context "golang.org/x/net/context"
 	"google.golang.org/grpc"
@@ -142,7 +142,7 @@ func pluginsToPB(plugins []*plugin.Plugin) []api.Plugin {
 				}
 			} else {
 				initErr = &rpc.Status{
-					Code:    int32(rpc.Code_UNKNOWN),
+					Code:    int32(rpc.UNKNOWN),
 					Message: err.Error(),
 				}
 			}

vendor/github.com/containerd/containerd/vendor.conf

@@ -16,7 +16,8 @@ github.com/prometheus/common 89604d197083d4781071d3c65855d24ecfb0a563
 github.com/prometheus/procfs cb4147076ac75738c9a7d279075a253c0cc5acbd
 github.com/beorn7/perks 4c0e84591b9aa9e6dcfdf3e020114cd81f89d5f9
 github.com/matttproud/golang_protobuf_extensions v1.0.0
-github.com/gogo/protobuf v0.5
+github.com/gogo/protobuf v1.0.0
+github.com/gogo/googleapis 08a7655d27152912db7aaf4f983275eaf8d128ef
 github.com/golang/protobuf 1643683e1b54a9e88ad26d98f81400c8c9d9f4f9
 github.com/opencontainers/runtime-spec v1.0.1
 github.com/opencontainers/runc 69663f0bd4b60df09991c08812a60108003fa340
@@ -24,7 +25,7 @@ github.com/sirupsen/logrus v1.0.0
 github.com/pmezard/go-difflib v1.0.0
 github.com/urfave/cli 7bc6a0acffa589f415f88aca16cc1de5ffd66f9c
 golang.org/x/net 7dcfb8076726a3fdd9353b6b8a1f1b6be6811bd6
-google.golang.org/grpc v1.7.4
+google.golang.org/grpc v1.10.1
 github.com/pkg/errors v0.8.0
 github.com/opencontainers/go-digest 21dfd564fd89c944783d00d069f33e3e7123c448
 golang.org/x/sys 314a259e304ff91bd6985da2a7149bbf91237993 https://github.com/golang/sys
@@ -43,7 +44,7 @@ github.com/gotestyourself/gotestyourself 44dbf532bbf5767611f6f2a61bded572e337010
 github.com/google/go-cmp v0.1.0
 
 # cri dependencies
-github.com/containerd/cri v1.0.0-rc.1
+github.com/containerd/cri v1.0.0-rc.2
 github.com/containerd/go-cni f2d7272f12d045b16ed924f50e91f9f9cecc55a7
 github.com/blang/semver v3.1.0
 github.com/containernetworking/cni v0.6.0

vendor/github.com/containerd/containerd/version/version.go

@@ -21,7 +21,7 @@ var (
 	Package = "github.com/containerd/containerd"
 
 	// Version holds the complete version number. Filled in at linking time.
-	Version = "1.1.0-rc.1+unknown"
+	Version = "1.1.0-rc.2+unknown"
 
 	// Revision is filled with the VCS (e.g. git) revision being used to build
 	// the program at linking time.

vendor/github.com/gogo/googleapis/Readme.md

@@ -0,0 +1,5 @@
+# Google APIs generated by gogoprotobuf
+
+[![Build Status](https://travis-ci.org/gogo/googleapis.svg?branch=master)](https://travis-ci.org/gogo/googleapis)
+
+The [grpc-example](https://github.com/gogo/grpc-example) includes an example usage of this repository.

vendor/github.com/gogo/googleapis/google/rpc/code.pb.go

@@ -1,43 +1,19 @@
 // Code generated by protoc-gen-gogo. DO NOT EDIT.
-// source: github.com/containerd/containerd/protobuf/google/rpc/code.proto
+// source: google/rpc/code.proto
 
-/*
-Package rpc is a generated protocol buffer package.
-
-It is generated from these files:
-	github.com/containerd/containerd/protobuf/google/rpc/code.proto
-	github.com/containerd/containerd/protobuf/google/rpc/error_details.proto
-	github.com/containerd/containerd/protobuf/google/rpc/status.proto
-
-It has these top-level messages:
-	RetryInfo
-	DebugInfo
-	QuotaFailure
-	PreconditionFailure
-	BadRequest
-	RequestInfo
-	ResourceInfo
-	Help
-	LocalizedMessage
-	Status
-*/
 package rpc
 
 import proto "github.com/gogo/protobuf/proto"
 import fmt "fmt"
 import math "math"
 
+import strconv "strconv"
+
 // Reference imports to suppress errors if they are not otherwise used.
 var _ = proto.Marshal
 var _ = fmt.Errorf
 var _ = math.Inf
 
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.GoGoProtoPackageIsVersion2 // please upgrade the proto package
-
 // The canonical error codes for Google APIs.
 //
 //
@@ -51,11 +27,11 @@ const (
 	// Not an error; returned on success
 	//
 	// HTTP Mapping: 200 OK
-	Code_OK Code = 0
+	OK Code = 0
 	// The operation was cancelled, typically by the caller.
 	//
 	// HTTP Mapping: 499 Client Closed Request
-	Code_CANCELLED Code = 1
+	CANCELLED Code = 1
 	// Unknown error.  For example, this error may be returned when
 	// a `Status` value received from another address space belongs to
 	// an error space that is not known in this address space.  Also
@@ -63,14 +39,14 @@ const (
 	// may be converted to this error.
 	//
 	// HTTP Mapping: 500 Internal Server Error
-	Code_UNKNOWN Code = 2
+	UNKNOWN Code = 2
 	// The client specified an invalid argument.  Note that this differs
 	// from `FAILED_PRECONDITION`.  `INVALID_ARGUMENT` indicates arguments
 	// that are problematic regardless of the state of the system
 	// (e.g., a malformed file name).
 	//
 	// HTTP Mapping: 400 Bad Request
-	Code_INVALID_ARGUMENT Code = 3
+	INVALID_ARGUMENT Code = 3
 	// The deadline expired before the operation could complete. For operations
 	// that change the state of the system, this error may be returned
 	// even if the operation has completed successfully.  For example, a
@@ -78,7 +54,7 @@ const (
 	// enough for the deadline to expire.
 	//
 	// HTTP Mapping: 504 Gateway Timeout
-	Code_DEADLINE_EXCEEDED Code = 4
+	DEADLINE_EXCEEDED Code = 4
 	// Some requested entity (e.g., file or directory) was not found.
 	//
 	// Note to server developers: if a request is denied for an entire class
@@ -88,12 +64,12 @@ const (
 	// must be used.
 	//
 	// HTTP Mapping: 404 Not Found
-	Code_NOT_FOUND Code = 5
+	NOT_FOUND Code = 5
 	// The entity that a client attempted to create (e.g., file or directory)
 	// already exists.
 	//
 	// HTTP Mapping: 409 Conflict
-	Code_ALREADY_EXISTS Code = 6
+	ALREADY_EXISTS Code = 6
 	// The caller does not have permission to execute the specified
 	// operation. `PERMISSION_DENIED` must not be used for rejections
 	// caused by exhausting some resource (use `RESOURCE_EXHAUSTED`
@@ -104,17 +80,17 @@ const (
 	// other pre-conditions.
 	//
 	// HTTP Mapping: 403 Forbidden
-	Code_PERMISSION_DENIED Code = 7
+	PERMISSION_DENIED Code = 7
 	// The request does not have valid authentication credentials for the
 	// operation.
 	//
 	// HTTP Mapping: 401 Unauthorized
-	Code_UNAUTHENTICATED Code = 16
+	UNAUTHENTICATED Code = 16
 	// Some resource has been exhausted, perhaps a per-user quota, or
 	// perhaps the entire file system is out of space.
 	//
 	// HTTP Mapping: 429 Too Many Requests
-	Code_RESOURCE_EXHAUSTED Code = 8
+	RESOURCE_EXHAUSTED Code = 8
 	// The operation was rejected because the system is not in a state
 	// required for the operation's execution.  For example, the directory
 	// to be deleted is non-empty, an rmdir operation is applied to
@@ -133,7 +109,7 @@ const (
 	//      the files are deleted from the directory.
 	//
 	// HTTP Mapping: 400 Bad Request
-	Code_FAILED_PRECONDITION Code = 9
+	FAILED_PRECONDITION Code = 9
 	// The operation was aborted, typically due to a concurrency issue such as
 	// a sequencer check failure or transaction abort.
 	//
@@ -141,7 +117,7 @@ const (
 	// `ABORTED`, and `UNAVAILABLE`.
 	//
 	// HTTP Mapping: 409 Conflict
-	Code_ABORTED Code = 10
+	ABORTED Code = 10
 	// The operation was attempted past the valid range.  E.g., seeking or
 	// reading past end-of-file.
 	//
@@ -159,18 +135,18 @@ const (
 	// they are done.
 	//
 	// HTTP Mapping: 400 Bad Request
-	Code_OUT_OF_RANGE Code = 11
+	OUT_OF_RANGE Code = 11
 	// The operation is not implemented or is not supported/enabled in this
 	// service.
 	//
 	// HTTP Mapping: 501 Not Implemented
-	Code_UNIMPLEMENTED Code = 12
+	UNIMPLEMENTED Code = 12
 	// Internal errors.  This means that some invariants expected by the
 	// underlying system have been broken.  This error code is reserved
 	// for serious errors.
 	//
 	// HTTP Mapping: 500 Internal Server Error
-	Code_INTERNAL Code = 13
+	INTERNAL Code = 13
 	// The service is currently unavailable.  This is most likely a
 	// transient condition, which can be corrected by retrying with
 	// a backoff.
@@ -179,11 +155,11 @@ const (
 	// `ABORTED`, and `UNAVAILABLE`.
 	//
 	// HTTP Mapping: 503 Service Unavailable
-	Code_UNAVAILABLE Code = 14
+	UNAVAILABLE Code = 14
 	// Unrecoverable data loss or corruption.
 	//
 	// HTTP Mapping: 500 Internal Server Error
-	Code_DATA_LOSS Code = 15
+	DATA_LOSS Code = 15
 )
 
 var Code_name = map[int32]string{
@@ -225,45 +201,46 @@ var Code_value = map[string]int32{
 	"DATA_LOSS":           15,
 }
 
-func (x Code) String() string {
-	return proto.EnumName(Code_name, int32(x))
-}
 func (Code) EnumDescriptor() ([]byte, []int) { return fileDescriptorCode, []int{0} }
 
 func init() {
 	proto.RegisterEnum("google.rpc.Code", Code_name, Code_value)
 }
-
+func (x Code) String() string {
-func init() {
+	s, ok := Code_name[int32(x)]
-	proto.RegisterFile("github.com/containerd/containerd/protobuf/google/rpc/code.proto", fileDescriptorCode)
+	if ok {
+		return s
+	}
+	return strconv.Itoa(int(x))
 }
 
+func init() { proto.RegisterFile("google/rpc/code.proto", fileDescriptorCode) }
+
 var fileDescriptorCode = []byte{
-	// 405 bytes of a gzipped FileDescriptorProto
+	// 393 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x9c, 0x91, 0xbb, 0x72, 0x13, 0x31,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x44, 0x91, 0x3d, 0x6e, 0x13, 0x41,
-	0x14, 0x86, 0xbd, 0x4e, 0x70, 0x62, 0xf9, 0x76, 0xa2, 0x70, 0xe9, 0xf6, 0x01, 0x28, 0xec, 0x82,
+	0x14, 0xc7, 0x3d, 0x76, 0x70, 0xe2, 0xf1, 0xd7, 0xcb, 0x84, 0x40, 0x37, 0x07, 0xa0, 0x70, 0x0a,
-	0x86, 0x19, 0x0a, 0xe6, 0x78, 0x75, 0x9c, 0x68, 0x22, 0x1f, 0xed, 0x68, 0xa5, 0x10, 0x68, 0x76,
+	0x4e, 0xf0, 0xbc, 0xf3, 0x9c, 0x8c, 0x32, 0x7e, 0xb3, 0x9a, 0x9d, 0x09, 0x01, 0x21, 0xad, 0xc4,
-	0xf0, 0xda, 0x98, 0xcc, 0x90, 0xac, 0x67, 0xc7, 0xee, 0x79, 0x16, 0x5e, 0x82, 0x57, 0x48, 0x49,
+	0xc6, 0x4a, 0x03, 0x5a, 0xcb, 0xe2, 0x00, 0x9c, 0x85, 0x8a, 0x1b, 0x70, 0x85, 0x94, 0x29, 0x29,
-	0x49, 0x49, 0xfc, 0x24, 0x8c, 0x4c, 0x01, 0x35, 0x9d, 0xe6, 0xff, 0x75, 0x2e, 0xff, 0x77, 0xc4,
+	0xf1, 0xa6, 0xa1, 0x74, 0x49, 0x89, 0x06, 0x0a, 0xda, 0x9f, 0xde, 0xc7, 0xff, 0x43, 0x9e, 0xdf,
-	0xdb, 0xf5, 0xed, 0xf6, 0xf3, 0x6e, 0x31, 0xae, 0xea, 0xbb, 0x49, 0x55, 0xdf, 0x6f, 0x3f, 0xde,
+	0xb7, 0xed, 0xfd, 0xc7, 0xcd, 0xc5, 0x6e, 0xdb, 0x5c, 0x34, 0xed, 0xdd, 0x66, 0xb1, 0xdd, 0xb5,
-	0xde, 0xaf, 0x9a, 0xe5, 0xbf, 0xcf, 0x4d, 0x53, 0x6f, 0xeb, 0xc5, 0xee, 0xd3, 0x64, 0x5d, 0xd7,
+	0x9f, 0x5b, 0x25, 0xff, 0xe1, 0xc5, 0x6e, 0xdb, 0xbc, 0xfa, 0xde, 0x97, 0x47, 0x45, 0x7b, 0xb7,
-	0xeb, 0x2f, 0xab, 0x49, 0xb3, 0xa9, 0x26, 0x55, 0xbd, 0x5c, 0x8d, 0x0f, 0x86, 0x14, 0x7f, 0xe4,
+	0x51, 0x43, 0xd9, 0xf7, 0xd7, 0xd0, 0x53, 0x53, 0x39, 0x2a, 0x90, 0x0b, 0x72, 0x8e, 0x0c, 0x08,
-	0x71, 0xb3, 0xa9, 0x5e, 0x7e, 0x6f, 0x8b, 0xe3, 0xac, 0x5e, 0xae, 0x64, 0x47, 0xb4, 0xed, 0x15,
+	0x35, 0x96, 0xc7, 0x89, 0xaf, 0xd9, 0xbf, 0x61, 0xe8, 0xab, 0xe7, 0x12, 0x2c, 0xdf, 0xa0, 0xb3,
-	0xb4, 0xe4, 0x40, 0x74, 0x33, 0xe4, 0x8c, 0x8c, 0x21, 0x05, 0x89, 0xec, 0x89, 0x93, 0xc0, 0x57,
+	0xa6, 0xc6, 0x70, 0x99, 0xd6, 0xc4, 0x11, 0x06, 0xea, 0x5c, 0x9e, 0x1a, 0x42, 0xe3, 0x2c, 0x53,
-	0x6c, 0xdf, 0x31, 0xb4, 0xe5, 0x53, 0x01, 0x9a, 0xaf, 0xd1, 0x68, 0x55, 0xa2, 0xbb, 0x08, 0x73,
+	0x4d, 0xb7, 0x05, 0x91, 0x21, 0x03, 0x47, 0xf9, 0x10, 0xfb, 0x58, 0xaf, 0x7c, 0x62, 0x03, 0xcf,
-	0x62, 0x0f, 0x47, 0xf2, 0x99, 0x38, 0x53, 0x84, 0xca, 0x68, 0xa6, 0x92, 0x6e, 0x32, 0x22, 0x45,
+	0x94, 0x92, 0x33, 0x74, 0x81, 0xd0, 0xbc, 0xad, 0xe9, 0xd6, 0x56, 0xb1, 0x82, 0x61, 0xde, 0x2c,
-	0x0a, 0x8e, 0x63, 0x23, 0xb6, 0xbe, 0x9c, 0xd9, 0xc0, 0x0a, 0x9e, 0x48, 0x29, 0x86, 0x68, 0x1c,
+	0x29, 0xac, 0x6d, 0x55, 0x59, 0xcf, 0xb5, 0x21, 0xb6, 0x64, 0xe0, 0x58, 0x9d, 0xc9, 0x79, 0x62,
-	0xa1, 0x7a, 0x5f, 0xd2, 0x8d, 0x2e, 0x7c, 0x01, 0x9d, 0x58, 0x99, 0x93, 0x9b, 0xeb, 0xa2, 0xd0,
+	0x4c, 0xf1, 0x8a, 0x38, 0xda, 0x02, 0x23, 0x19, 0x00, 0xf5, 0x42, 0xaa, 0x40, 0x95, 0x4f, 0xa1,
-	0x96, 0x4b, 0x45, 0xac, 0x49, 0xc1, 0x89, 0x3c, 0x17, 0xa3, 0xc0, 0x18, 0xfc, 0x25, 0xb1, 0xd7,
+	0xc8, 0x5f, 0xae, 0x30, 0x55, 0x99, 0x9f, 0xa8, 0x97, 0xf2, 0x6c, 0x85, 0xd6, 0x91, 0xa9, 0xcb,
-	0x19, 0x7a, 0x52, 0x00, 0xf2, 0xb9, 0x90, 0x8e, 0x0a, 0x1b, 0x5c, 0x16, 0xa7, 0x5c, 0x62, 0x28,
+	0x40, 0x85, 0x67, 0x63, 0xa3, 0xf5, 0x0c, 0xa3, 0xac, 0x1c, 0x97, 0x3e, 0xe4, 0x29, 0xa9, 0x40,
-	0xa2, 0x7e, 0x2a, 0x5f, 0x88, 0xf3, 0x19, 0x6a, 0x43, 0xaa, 0xcc, 0x1d, 0x65, 0x96, 0x95, 0xf6,
+	0x4e, 0x7c, 0x8a, 0xb5, 0x5f, 0xd5, 0x01, 0xf9, 0x92, 0x60, 0xac, 0x4e, 0xe5, 0x34, 0xb1, 0x5d,
-	0xda, 0x32, 0x74, 0xe3, 0xe6, 0x38, 0xb5, 0x2e, 0xfe, 0x12, 0x12, 0x44, 0xdf, 0x06, 0x5f, 0xda,
+	0x97, 0x8e, 0xb2, 0x0d, 0x32, 0x30, 0x51, 0x13, 0x79, 0x62, 0x39, 0x52, 0x60, 0x74, 0x30, 0x55,
-	0x59, 0xe9, 0x90, 0x2f, 0x08, 0x7a, 0xf2, 0x4c, 0x0c, 0x02, 0xeb, 0x79, 0x6e, 0x28, 0xc6, 0x20,
+	0x73, 0x39, 0x4e, 0x8c, 0x37, 0x68, 0x1d, 0x2e, 0x1d, 0xc1, 0x2c, 0x1b, 0x32, 0x18, 0xb1, 0x76,
-	0x05, 0x7d, 0xd9, 0x17, 0xa7, 0x9a, 0x3d, 0x39, 0x46, 0x03, 0x03, 0x39, 0x12, 0xbd, 0xc0, 0x78,
+	0xbe, 0xaa, 0x60, 0xbe, 0x7c, 0xff, 0xb8, 0xd7, 0xbd, 0x1f, 0x7b, 0xdd, 0x3b, 0xec, 0xb5, 0xf8,
-	0x8d, 0xda, 0xe0, 0xd4, 0x10, 0x0c, 0x63, 0x20, 0x85, 0x1e, 0x4b, 0x63, 0x8b, 0x02, 0x46, 0xd3,
+	0xbd, 0xd7, 0xe2, 0x4b, 0xa7, 0xc5, 0xb7, 0x4e, 0x8b, 0x87, 0x4e, 0x8b, 0xc7, 0x4e, 0x8b, 0x9f,
-	0xdd, 0xc3, 0x63, 0xda, 0xfa, 0xf9, 0x98, 0xb6, 0xbe, 0xee, 0xd3, 0xe4, 0x61, 0x9f, 0x26, 0x3f,
+	0x9d, 0x16, 0xbf, 0x3a, 0xdd, 0x3b, 0x64, 0xfe, 0xa4, 0xc5, 0xc3, 0x93, 0x16, 0x72, 0xd6, 0xb4,
-	0xf6, 0x69, 0xf2, 0x6b, 0x9f, 0x26, 0x62, 0x58, 0xd5, 0x77, 0xe3, 0xbf, 0x8c, 0xa7, 0xdd, 0x08,
+	0x9f, 0x16, 0xff, 0xf3, 0x5f, 0x8e, 0x72, 0xf8, 0x65, 0xae, 0xa5, 0x14, 0xef, 0x06, 0xbb, 0x6d,
-	0x38, 0x8f, 0xe8, 0xf3, 0xe4, 0xc3, 0xeb, 0xff, 0xb9, 0xde, 0x9b, 0x66, 0x53, 0x7d, 0x6b, 0x1f,
+	0xf3, 0xb5, 0x3f, 0x08, 0x65, 0xf1, 0x61, 0xf8, 0xb7, 0xaa, 0xd7, 0x7f, 0x02, 0x00, 0x00, 0xff,
-	0xb9, 0x3c, 0x5b, 0x74, 0x0e, 0xf6, 0xab, 0xdf, 0x01, 0x00, 0x00, 0xff, 0xff, 0xf2, 0x0a, 0x2d,
+	0xff, 0x03, 0xd4, 0x27, 0xff, 0xc3, 0x01, 0x00, 0x00,
-	0x67, 0x06, 0x02, 0x00, 0x00,
 }

vendor/github.com/gogo/googleapis/google/rpc/code.proto

@@ -16,7 +16,7 @@ syntax = "proto3";
 
 package google.rpc;
 
-option go_package = "github.com/containerd/containerd/protobuf/google/rpc;rpc";
+option go_package = "rpc";
 option java_multiple_files = true;
 option java_outer_classname = "CodeProto";
 option java_package = "com.google.rpc";

vendor/github.com/gogo/googleapis/google/rpc/error_details.proto

@@ -18,7 +18,7 @@ package google.rpc;
 
 import "google/protobuf/duration.proto";
 
-option go_package = "github.com/containerd/containerd/protobuf/google/rpc;rpc";
+option go_package = "rpc";
 option java_multiple_files = true;
 option java_outer_classname = "ErrorDetailsProto";
 option java_package = "com.google.rpc";

vendor/github.com/gogo/googleapis/google/rpc/status.pb.go

@@ -1,12 +1,32 @@
 // Code generated by protoc-gen-gogo. DO NOT EDIT.
-// source: github.com/containerd/containerd/protobuf/google/rpc/status.proto
+// source: google/rpc/status.proto
 
+/*
+	Package rpc is a generated protocol buffer package.
+
+	It is generated from these files:
+		google/rpc/status.proto
+		google/rpc/error_details.proto
+		google/rpc/code.proto
+
+	It has these top-level messages:
+		Status
+		RetryInfo
+		DebugInfo
+		QuotaFailure
+		PreconditionFailure
+		BadRequest
+		RequestInfo
+		ResourceInfo
+		Help
+		LocalizedMessage
+*/
 package rpc
 
 import proto "github.com/gogo/protobuf/proto"
 import fmt "fmt"
 import math "math"
-import google_protobuf1 "github.com/gogo/protobuf/types"
+import google_protobuf "github.com/gogo/protobuf/types"
 
 import strings "strings"
 import reflect "reflect"
@@ -18,6 +38,12 @@ var _ = proto.Marshal
 var _ = fmt.Errorf
 var _ = math.Inf
 
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.GoGoProtoPackageIsVersion2 // please upgrade the proto package
+
 // The `Status` type defines a logical error model that is suitable for different
 // programming environments, including REST APIs and RPC APIs. It is used by
 // [gRPC](https://github.com/grpc). The error model is designed to be:
@@ -79,16 +105,147 @@ type Status struct {
 	Message string `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
 	// A list of messages that carry the error details.  There is a common set of
 	// message types for APIs to use.
-	Details []*google_protobuf1.Any `protobuf:"bytes,3,rep,name=details" json:"details,omitempty"`
+	Details []*google_protobuf.Any `protobuf:"bytes,3,rep,name=details" json:"details,omitempty"`
 }
 
 func (m *Status) Reset()                    { *m = Status{} }
 func (*Status) ProtoMessage()               {}
 func (*Status) Descriptor() ([]byte, []int) { return fileDescriptorStatus, []int{0} }
 
+func (m *Status) GetCode() int32 {
+	if m != nil {
+		return m.Code
+	}
+	return 0
+}
+
+func (m *Status) GetMessage() string {
+	if m != nil {
+		return m.Message
+	}
+	return ""
+}
+
+func (m *Status) GetDetails() []*google_protobuf.Any {
+	if m != nil {
+		return m.Details
+	}
+	return nil
+}
+
+func (*Status) XXX_MessageName() string {
+	return "google.rpc.Status"
+}
 func init() {
 	proto.RegisterType((*Status)(nil), "google.rpc.Status")
 }
+func (this *Status) Compare(that interface{}) int {
+	if that == nil {
+		if this == nil {
+			return 0
+		}
+		return 1
+	}
+
+	that1, ok := that.(*Status)
+	if !ok {
+		that2, ok := that.(Status)
+		if ok {
+			that1 = &that2
+		} else {
+			return 1
+		}
+	}
+	if that1 == nil {
+		if this == nil {
+			return 0
+		}
+		return 1
+	} else if this == nil {
+		return -1
+	}
+	if this.Code != that1.Code {
+		if this.Code < that1.Code {
+			return -1
+		}
+		return 1
+	}
+	if this.Message != that1.Message {
+		if this.Message < that1.Message {
+			return -1
+		}
+		return 1
+	}
+	if len(this.Details) != len(that1.Details) {
+		if len(this.Details) < len(that1.Details) {
+			return -1
+		}
+		return 1
+	}
+	for i := range this.Details {
+		if c := this.Details[i].Compare(that1.Details[i]); c != 0 {
+			return c
+		}
+	}
+	return 0
+}
+func (this *Status) Equal(that interface{}) bool {
+	if that == nil {
+		return this == nil
+	}
+
+	that1, ok := that.(*Status)
+	if !ok {
+		that2, ok := that.(Status)
+		if ok {
+			that1 = &that2
+		} else {
+			return false
+		}
+	}
+	if that1 == nil {
+		return this == nil
+	} else if this == nil {
+		return false
+	}
+	if this.Code != that1.Code {
+		return false
+	}
+	if this.Message != that1.Message {
+		return false
+	}
+	if len(this.Details) != len(that1.Details) {
+		return false
+	}
+	for i := range this.Details {
+		if !this.Details[i].Equal(that1.Details[i]) {
+			return false
+		}
+	}
+	return true
+}
+func (this *Status) GoString() string {
+	if this == nil {
+		return "nil"
+	}
+	s := make([]string, 0, 7)
+	s = append(s, "&rpc.Status{")
+	s = append(s, "Code: "+fmt.Sprintf("%#v", this.Code)+",\n")
+	s = append(s, "Message: "+fmt.Sprintf("%#v", this.Message)+",\n")
+	if this.Details != nil {
+		s = append(s, "Details: "+fmt.Sprintf("%#v", this.Details)+",\n")
+	}
+	s = append(s, "}")
+	return strings.Join(s, "")
+}
+func valueToGoStringStatus(v interface{}, typ string) string {
+	rv := reflect.ValueOf(v)
+	if rv.IsNil() {
+		return "nil"
+	}
+	pv := reflect.Indirect(rv).Interface()
+	return fmt.Sprintf("func(v %v) *%v { return &v } ( %#v )", typ, typ, pv)
+}
 func (m *Status) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
@@ -139,6 +296,97 @@ func encodeVarintStatus(dAtA []byte, offset int, v uint64) int {
 	dAtA[offset] = uint8(v)
 	return offset + 1
 }
+func NewPopulatedStatus(r randyStatus, easy bool) *Status {
+	this := &Status{}
+	this.Code = int32(r.Int31())
+	if r.Intn(2) == 0 {
+		this.Code *= -1
+	}
+	this.Message = string(randStringStatus(r))
+	if r.Intn(10) != 0 {
+		v1 := r.Intn(5)
+		this.Details = make([]*google_protobuf.Any, v1)
+		for i := 0; i < v1; i++ {
+			this.Details[i] = google_protobuf.NewPopulatedAny(r, easy)
+		}
+	}
+	if !easy && r.Intn(10) != 0 {
+	}
+	return this
+}
+
+type randyStatus interface {
+	Float32() float32
+	Float64() float64
+	Int63() int64
+	Int31() int32
+	Uint32() uint32
+	Intn(n int) int
+}
+
+func randUTF8RuneStatus(r randyStatus) rune {
+	ru := r.Intn(62)
+	if ru < 10 {
+		return rune(ru + 48)
+	} else if ru < 36 {
+		return rune(ru + 55)
+	}
+	return rune(ru + 61)
+}
+func randStringStatus(r randyStatus) string {
+	v2 := r.Intn(100)
+	tmps := make([]rune, v2)
+	for i := 0; i < v2; i++ {
+		tmps[i] = randUTF8RuneStatus(r)
+	}
+	return string(tmps)
+}
+func randUnrecognizedStatus(r randyStatus, maxFieldNumber int) (dAtA []byte) {
+	l := r.Intn(5)
+	for i := 0; i < l; i++ {
+		wire := r.Intn(4)
+		if wire == 3 {
+			wire = 5
+		}
+		fieldNumber := maxFieldNumber + r.Intn(100)
+		dAtA = randFieldStatus(dAtA, r, fieldNumber, wire)
+	}
+	return dAtA
+}
+func randFieldStatus(dAtA []byte, r randyStatus, fieldNumber int, wire int) []byte {
+	key := uint32(fieldNumber)<<3 | uint32(wire)
+	switch wire {
+	case 0:
+		dAtA = encodeVarintPopulateStatus(dAtA, uint64(key))
+		v3 := r.Int63()
+		if r.Intn(2) == 0 {
+			v3 *= -1
+		}
+		dAtA = encodeVarintPopulateStatus(dAtA, uint64(v3))
+	case 1:
+		dAtA = encodeVarintPopulateStatus(dAtA, uint64(key))
+		dAtA = append(dAtA, byte(r.Intn(256)), byte(r.Intn(256)), byte(r.Intn(256)), byte(r.Intn(256)), byte(r.Intn(256)), byte(r.Intn(256)), byte(r.Intn(256)), byte(r.Intn(256)))
+	case 2:
+		dAtA = encodeVarintPopulateStatus(dAtA, uint64(key))
+		ll := r.Intn(100)
+		dAtA = encodeVarintPopulateStatus(dAtA, uint64(ll))
+		for j := 0; j < ll; j++ {
+			dAtA = append(dAtA, byte(r.Intn(256)))
+		}
+	default:
+		dAtA = encodeVarintPopulateStatus(dAtA, uint64(key))
+		dAtA = append(dAtA, byte(r.Intn(256)), byte(r.Intn(256)), byte(r.Intn(256)), byte(r.Intn(256)))
+	}
+	return dAtA
+}
+func encodeVarintPopulateStatus(dAtA []byte, v uint64) []byte {
+	for v >= 1<<7 {
+		dAtA = append(dAtA, uint8(uint64(v)&0x7f|0x80))
+		v >>= 7
+	}
+	dAtA = append(dAtA, uint8(v))
+	return dAtA
+}
 func (m *Status) Size() (n int) {
 	var l int
 	_ = l
@@ -178,7 +426,7 @@ func (this *Status) String() string {
 	s := strings.Join([]string{`&Status{`,
 		`Code:` + fmt.Sprintf("%v", this.Code) + `,`,
 		`Message:` + fmt.Sprintf("%v", this.Message) + `,`,
-		`Details:` + strings.Replace(fmt.Sprintf("%v", this.Details), "Any", "google_protobuf1.Any", 1) + `,`,
+		`Details:` + strings.Replace(fmt.Sprintf("%v", this.Details), "Any", "google_protobuf.Any", 1) + `,`,
 		`}`,
 	}, "")
 	return s
@@ -294,7 +542,7 @@ func (m *Status) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Details = append(m.Details, &google_protobuf1.Any{})
+			m.Details = append(m.Details, &google_protobuf.Any{})
 			if err := m.Details[len(m.Details)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
@@ -425,25 +673,23 @@ var (
 	ErrIntOverflowStatus   = fmt.Errorf("proto: integer overflow")
 )
 
-func init() {
+func init() { proto.RegisterFile("google/rpc/status.proto", fileDescriptorStatus) }
-	proto.RegisterFile("github.com/containerd/containerd/protobuf/google/rpc/status.proto", fileDescriptorStatus)
-}
 
 var fileDescriptorStatus = []byte{
-	// 236 bytes of a gzipped FileDescriptorProto
+	// 235 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x72, 0x4c, 0xcf, 0x2c, 0xc9,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0x4f, 0xcf, 0xcf, 0x4f,
-	0x28, 0x4d, 0xd2, 0x4b, 0xce, 0xcf, 0xd5, 0x4f, 0xce, 0xcf, 0x2b, 0x49, 0xcc, 0xcc, 0x4b, 0x2d,
+	0xcf, 0x49, 0xd5, 0x2f, 0x2a, 0x48, 0xd6, 0x2f, 0x2e, 0x49, 0x2c, 0x29, 0x2d, 0xd6, 0x2b, 0x28,
-	0x4a, 0x41, 0x66, 0x16, 0x14, 0xe5, 0x97, 0xe4, 0x27, 0x95, 0xa6, 0xe9, 0xa7, 0xe7, 0xe7, 0xa7,
+	0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x82, 0x48, 0xe8, 0x15, 0x15, 0x24, 0x4b, 0x49, 0x42, 0x15, 0x81,
-	0xe7, 0xa4, 0xea, 0x17, 0x15, 0x24, 0xeb, 0x17, 0x97, 0x24, 0x96, 0x94, 0x16, 0xeb, 0x81, 0xa5,
+	0x65, 0x92, 0x4a, 0xd3, 0xf4, 0x13, 0xf3, 0x2a, 0x21, 0xca, 0x94, 0xd2, 0xb8, 0xd8, 0x82, 0xc1,
-	0x84, 0xb8, 0x20, 0x12, 0x7a, 0x45, 0x05, 0xc9, 0x52, 0x92, 0x50, 0x45, 0x70, 0x4d, 0x89, 0x79,
+	0xda, 0x84, 0x84, 0xb8, 0x58, 0x92, 0xf3, 0x53, 0x52, 0x25, 0x18, 0x15, 0x18, 0x35, 0x58, 0x83,
-	0x95, 0x10, 0x65, 0x4a, 0x69, 0x5c, 0x6c, 0xc1, 0x60, 0x6d, 0x42, 0x42, 0x5c, 0x2c, 0xc9, 0xf9,
+	0xc0, 0x6c, 0x21, 0x09, 0x2e, 0xf6, 0xdc, 0xd4, 0xe2, 0xe2, 0xc4, 0xf4, 0x54, 0x09, 0x26, 0x05,
-	0x29, 0xa9, 0x12, 0x8c, 0x0a, 0x8c, 0x1a, 0xac, 0x41, 0x60, 0xb6, 0x90, 0x04, 0x17, 0x7b, 0x6e,
+	0x46, 0x0d, 0xce, 0x20, 0x18, 0x57, 0x48, 0x8f, 0x8b, 0x3d, 0x25, 0xb5, 0x24, 0x31, 0x33, 0xa7,
-	0x6a, 0x71, 0x71, 0x62, 0x7a, 0xaa, 0x04, 0x93, 0x02, 0xa3, 0x06, 0x67, 0x10, 0x8c, 0x2b, 0xa4,
+	0x58, 0x82, 0x59, 0x81, 0x59, 0x83, 0xdb, 0x48, 0x44, 0x0f, 0x6a, 0x21, 0xcc, 0x12, 0x3d, 0xc7,
-	0xc7, 0xc5, 0x9e, 0x92, 0x5a, 0x92, 0x98, 0x99, 0x53, 0x2c, 0xc1, 0xac, 0xc0, 0xac, 0xc1, 0x6d,
+	0xbc, 0xca, 0x20, 0x98, 0x22, 0xa7, 0xb8, 0x0b, 0x0f, 0xe5, 0x18, 0x6e, 0x3c, 0x94, 0x63, 0xf8,
-	0x24, 0xa2, 0x07, 0xb5, 0x10, 0x66, 0x89, 0x9e, 0x63, 0x5e, 0x65, 0x10, 0x4c, 0x91, 0x53, 0xf9,
+	0xf0, 0x50, 0x8e, 0xf1, 0xc7, 0x43, 0x39, 0xc6, 0x86, 0x47, 0x72, 0x8c, 0x2b, 0x1e, 0xc9, 0x31,
-	0x89, 0x87, 0x72, 0x0c, 0x37, 0x1e, 0xca, 0x31, 0x34, 0x3c, 0x92, 0x63, 0x3c, 0xf1, 0x48, 0x8e,
+	0x9e, 0x78, 0x24, 0xc7, 0x78, 0xe1, 0x91, 0x1c, 0xe3, 0x83, 0x47, 0x72, 0x8c, 0x2f, 0x1e, 0xc9,
-	0xf1, 0xc2, 0x23, 0x39, 0xc6, 0x07, 0x8f, 0xe4, 0x18, 0xb9, 0xf8, 0x92, 0xf3, 0x73, 0xf5, 0x10,
+	0x31, 0x7c, 0x00, 0x89, 0x3f, 0x96, 0x63, 0x3c, 0xf1, 0x58, 0x8e, 0x91, 0x8b, 0x2f, 0x39, 0x3f,
-	0x8e, 0x75, 0xe2, 0x86, 0xb8, 0x27, 0x00, 0x64, 0x4c, 0x00, 0x63, 0x94, 0x05, 0x39, 0x41, 0x61,
+	0x57, 0x0f, 0xe1, 0x11, 0x27, 0x6e, 0x88, 0x5b, 0x03, 0x40, 0x56, 0x04, 0x30, 0x46, 0x31, 0x17,
-	0x5d, 0x54, 0x90, 0xbc, 0x88, 0x89, 0x39, 0x28, 0xc0, 0x39, 0x89, 0x0d, 0x2c, 0x6d, 0x0c, 0x08,
+	0x15, 0x24, 0x2f, 0x62, 0x62, 0x0e, 0x0a, 0x70, 0x4e, 0x62, 0x03, 0x5b, 0x6b, 0x0c, 0x08, 0x00,
-	0x00, 0x00, 0xff, 0xff, 0x7d, 0xb3, 0x06, 0x51, 0x53, 0x01, 0x00, 0x00,
+	0x00, 0xff, 0xff, 0xaa, 0x06, 0xa1, 0xaa, 0x10, 0x01, 0x00, 0x00,
 }

vendor/github.com/gogo/googleapis/google/rpc/status.proto

@@ -18,7 +18,7 @@ package google.rpc;
 
 import "google/protobuf/any.proto";
 
-option go_package = "github.com/containerd/containerd/protobuf/google/rpc;rpc";
+option go_package = "rpc";
 option java_multiple_files = true;
 option java_outer_classname = "StatusProto";
 option java_package = "com.google.rpc";

vendor/github.com/gogo/protobuf/README

@@ -123,6 +123,7 @@ When the .proto file specifies `syntax="proto3"`, there are some differences:
 Consider file test.proto, containing
 
 ```proto
+	syntax = "proto2";
 	package example;
 	
 	enum FOO { X = 17; };

vendor/github.com/gogo/protobuf/Readme.md

@@ -43,8 +43,9 @@ These projects use gogoprotobuf:
   - <a href="https://github.com/heroiclabs/nakama">nakama</a>
   - <a href="https://github.com/src-d/proteus">proteus</a>
   - <a href="https://github.com/go-graphite">carbonzipper stack</a>
-  - <a href="https://sendgrid.com/">SendGrid</a>
+  - <a href="https://sendgrid.com/">sendgrid</a>
-  
+  - <a href="https://github.com/zero-os/0-stor">zero-os/0-stor</a>
+
 Please let us know if you are using gogoprotobuf by posting on our <a href="https://groups.google.com/forum/#!topic/gogoprotobuf/Brw76BxmFpQ">GoogleGroup</a>.
 
 ### Mentioned
@@ -64,10 +65,10 @@ After that you can choose:
 
 ### Installation
 
-To install it, you must first have Go (at least version 1.6.3) installed (see [http://golang.org/doc/install](http://golang.org/doc/install)).  Go 1.8.3 and 1.9 are continuously tested.
+To install it, you must first have Go (at least version 1.6.3) installed (see [http://golang.org/doc/install](http://golang.org/doc/install)). Latest patch versions of Go 1.8, 1.9 and 1.10 are continuously tested.
 
 Next, install the standard protocol buffer implementation from [https://github.com/google/protobuf](https://github.com/google/protobuf).
-Most versions from 2.3.1 should not give any problems, but 2.6.1, 3.0.2 and 3.4.0 are continuously tested.
+Most versions from 2.3.1 should not give any problems, but 2.6.1, 3.0.2 and 3.5.1 are continuously tested.
 
 ### Speed
 
@@ -98,7 +99,23 @@ Installing any of these binaries is easy.  Simply run:
     go get github.com/gogo/protobuf/{binary}
     go get github.com/gogo/protobuf/gogoproto
 
-These binaries allow you to using gogoprotobuf [extensions](https://github.com/gogo/protobuf/blob/master/extensions.md).
+These binaries allow you to use gogoprotobuf [extensions](https://github.com/gogo/protobuf/blob/master/extensions.md). You can also use your own binary.
+
+To generate the code, you also need to set the include path properly.
+
+    protoc -I=. -I=$GOPATH/src -I=$GOPATH/src/github.com/gogo/protobuf/protobuf --{binary}_out=. myproto.proto
+
+To use proto files from "google/protobuf" you need to add additional args to protoc.
+
+    protoc -I=. -I=$GOPATH/src -I=$GOPATH/src/github.com/gogo/protobuf/protobuf --{binary}_out=\
+    Mgoogle/protobuf/any.proto=github.com/gogo/protobuf/types,\
+    Mgoogle/protobuf/duration.proto=github.com/gogo/protobuf/types,\
+    Mgoogle/protobuf/struct.proto=github.com/gogo/protobuf/types,\
+    Mgoogle/protobuf/timestamp.proto=github.com/gogo/protobuf/types,\
+    Mgoogle/protobuf/wrappers.proto=github.com/gogo/protobuf/types:. \
+    myproto.proto
+    
+Note that in the protoc command, {binary} does not contain the initial prefix of "protoc-gen".
 
 ### Most Speed and most customization
 

vendor/github.com/gogo/protobuf/gogoproto/gogo.pb.go

@@ -723,81 +723,82 @@ func init() {
 func init() { proto.RegisterFile("gogo.proto", fileDescriptorGogo) }
 
 var fileDescriptorGogo = []byte{
-	// 1201 bytes of a gzipped FileDescriptorProto
+	// 1220 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x98, 0xcb, 0x6f, 0x1c, 0x45,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x98, 0x4b, 0x6f, 0x1c, 0x45,
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+	0x10, 0x80, 0x85, 0x48, 0x14, 0x6f, 0xd9, 0x8e, 0xf1, 0xda, 0x98, 0x10, 0x81, 0x08, 0x9c, 0x38,
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+	0x62, 0x17, 0x3d, 0x78, 0x9b, 0x1f, 0xe8, 0x8d, 0xbc, 0x39, 0xdd, 0x52, 0xd1, 0x0c, 0x1e, 0x35,
-	0x00,
+	0xbb, 0xbf, 0xa0, 0x95, 0x07, 0xcf, 0xff, 0x03, 0x00, 0x00, 0xff, 0xff, 0xed, 0x5f, 0x6c, 0x20,
+	0x74, 0x13, 0x00, 0x00,
 }

vendor/github.com/gogo/protobuf/gogoproto/gogo.proto

@@ -33,6 +33,7 @@ import "google/protobuf/descriptor.proto";
 
 option java_package = "com.google.protobuf";
 option java_outer_classname = "GoGoProtos";
+option go_package = "github.com/gogo/protobuf/gogoproto";
 
 extend google.protobuf.EnumOptions {
 	optional bool goproto_enum_prefix = 62001;

vendor/github.com/gogo/protobuf/proto/discard.go

@@ -0,0 +1,151 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2017 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+// DiscardUnknown recursively discards all unknown fields from this message
+// and all embedded messages.
+//
+// When unmarshaling a message with unrecognized fields, the tags and values
+// of such fields are preserved in the Message. This allows a later call to
+// marshal to be able to produce a message that continues to have those
+// unrecognized fields. To avoid this, DiscardUnknown is used to
+// explicitly clear the unknown fields after unmarshaling.
+//
+// For proto2 messages, the unknown fields of message extensions are only
+// discarded from messages that have been accessed via GetExtension.
+func DiscardUnknown(m Message) {
+	discardLegacy(m)
+}
+
+func discardLegacy(m Message) {
+	v := reflect.ValueOf(m)
+	if v.Kind() != reflect.Ptr || v.IsNil() {
+		return
+	}
+	v = v.Elem()
+	if v.Kind() != reflect.Struct {
+		return
+	}
+	t := v.Type()
+
+	for i := 0; i < v.NumField(); i++ {
+		f := t.Field(i)
+		if strings.HasPrefix(f.Name, "XXX_") {
+			continue
+		}
+		vf := v.Field(i)
+		tf := f.Type
+
+		// Unwrap tf to get its most basic type.
+		var isPointer, isSlice bool
+		if tf.Kind() == reflect.Slice && tf.Elem().Kind() != reflect.Uint8 {
+			isSlice = true
+			tf = tf.Elem()
+		}
+		if tf.Kind() == reflect.Ptr {
+			isPointer = true
+			tf = tf.Elem()
+		}
+		if isPointer && isSlice && tf.Kind() != reflect.Struct {
+			panic(fmt.Sprintf("%T.%s cannot be a slice of pointers to primitive types", m, f.Name))
+		}
+
+		switch tf.Kind() {
+		case reflect.Struct:
+			switch {
+			case !isPointer:
+				panic(fmt.Sprintf("%T.%s cannot be a direct struct value", m, f.Name))
+			case isSlice: // E.g., []*pb.T
+				for j := 0; j < vf.Len(); j++ {
+					discardLegacy(vf.Index(j).Interface().(Message))
+				}
+			default: // E.g., *pb.T
+				discardLegacy(vf.Interface().(Message))
+			}
+		case reflect.Map:
+			switch {
+			case isPointer || isSlice:
+				panic(fmt.Sprintf("%T.%s cannot be a pointer to a map or a slice of map values", m, f.Name))
+			default: // E.g., map[K]V
+				tv := vf.Type().Elem()
+				if tv.Kind() == reflect.Ptr && tv.Implements(protoMessageType) { // Proto struct (e.g., *T)
+					for _, key := range vf.MapKeys() {
+						val := vf.MapIndex(key)
+						discardLegacy(val.Interface().(Message))
+					}
+				}
+			}
+		case reflect.Interface:
+			// Must be oneof field.
+			switch {
+			case isPointer || isSlice:
+				panic(fmt.Sprintf("%T.%s cannot be a pointer to a interface or a slice of interface values", m, f.Name))
+			default: // E.g., test_proto.isCommunique_Union interface
+				if !vf.IsNil() && f.Tag.Get("protobuf_oneof") != "" {
+					vf = vf.Elem() // E.g., *test_proto.Communique_Msg
+					if !vf.IsNil() {
+						vf = vf.Elem()   // E.g., test_proto.Communique_Msg
+						vf = vf.Field(0) // E.g., Proto struct (e.g., *T) or primitive value
+						if vf.Kind() == reflect.Ptr {
+							discardLegacy(vf.Interface().(Message))
+						}
+					}
+				}
+			}
+		}
+	}
+
+	if vf := v.FieldByName("XXX_unrecognized"); vf.IsValid() {
+		if vf.Type() != reflect.TypeOf([]byte{}) {
+			panic("expected XXX_unrecognized to be of type []byte")
+		}
+		vf.Set(reflect.ValueOf([]byte(nil)))
+	}
+
+	// For proto2 messages, only discard unknown fields in message extensions
+	// that have been accessed via GetExtension.
+	if em, ok := extendable(m); ok {
+		// Ignore lock since discardLegacy is not concurrency safe.
+		emm, _ := em.extensionsRead()
+		for _, mx := range emm {
+			if m, ok := mx.value.(Message); ok {
+				discardLegacy(m)
+			}
+		}
+	}
+}

vendor/github.com/gogo/protobuf/protobuf/google/protobuf/descriptor.proto

@@ -45,6 +45,7 @@ option java_package = "com.google.protobuf";
 option java_outer_classname = "DescriptorProtos";
 option csharp_namespace = "Google.Protobuf.Reflection";
 option objc_class_prefix = "GPB";
+option cc_enable_arenas = true;
 
 // descriptor.proto must be optimized for speed because reflection-based
 // algorithms don't work during bootstrapping.
@@ -225,6 +226,26 @@ message EnumDescriptorProto {
   repeated EnumValueDescriptorProto value = 2;
 
   optional EnumOptions options = 3;
+
+  // Range of reserved numeric values. Reserved values may not be used by
+  // entries in the same enum. Reserved ranges may not overlap.
+  //
+  // Note that this is distinct from DescriptorProto.ReservedRange in that it
+  // is inclusive such that it can appropriately represent the entire int32
+  // domain.
+  message EnumReservedRange {
+    optional int32 start = 1; // Inclusive.
+    optional int32 end = 2;   // Inclusive.
+  }
+
+  // Range of reserved numeric values. Reserved numeric values may not be used
+  // by enum values in the same enum declaration. Reserved ranges may not
+  // overlap.
+  repeated EnumReservedRange reserved_range = 4;
+
+  // Reserved enum value names, which may not be reused. A given name may only
+  // be reserved once.
+  repeated string reserved_name = 5;
 }
 
 // Describes a value within an enum.
@@ -361,7 +382,7 @@ message FileOptions {
   optional bool cc_generic_services = 16 [default=false];
   optional bool java_generic_services = 17 [default=false];
   optional bool py_generic_services = 18 [default=false];
-  optional bool php_generic_services = 19 [default=false];
+  optional bool php_generic_services = 42 [default=false];
 
   // Is this file deprecated?
   // Depending on the target platform, this can emit Deprecated annotations

vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor.pb.go

@@ -805,10 +805,17 @@ func (m *OneofDescriptorProto) GetOptions() *OneofOptions {
 
 // Describes an enum type.
 type EnumDescriptorProto struct {
-	Name             *string                     `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Name    *string                     `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	Value            []*EnumValueDescriptorProto `protobuf:"bytes,2,rep,name=value" json:"value,omitempty"`
+	Value   []*EnumValueDescriptorProto `protobuf:"bytes,2,rep,name=value" json:"value,omitempty"`
-	Options          *EnumOptions                `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
+	Options *EnumOptions                `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
-	XXX_unrecognized []byte                      `json:"-"`
+	// Range of reserved numeric values. Reserved numeric values may not be used
+	// by enum values in the same enum declaration. Reserved ranges may not
+	// overlap.
+	ReservedRange []*EnumDescriptorProto_EnumReservedRange `protobuf:"bytes,4,rep,name=reserved_range,json=reservedRange" json:"reserved_range,omitempty"`
+	// Reserved enum value names, which may not be reused. A given name may only
+	// be reserved once.
+	ReservedName     []string `protobuf:"bytes,5,rep,name=reserved_name,json=reservedName" json:"reserved_name,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
 }
 
 func (m *EnumDescriptorProto) Reset()                    { *m = EnumDescriptorProto{} }
@@ -837,6 +844,53 @@ func (m *EnumDescriptorProto) GetOptions() *EnumOptions {
 	return nil
 }
 
+func (m *EnumDescriptorProto) GetReservedRange() []*EnumDescriptorProto_EnumReservedRange {
+	if m != nil {
+		return m.ReservedRange
+	}
+	return nil
+}
+
+func (m *EnumDescriptorProto) GetReservedName() []string {
+	if m != nil {
+		return m.ReservedName
+	}
+	return nil
+}
+
+// Range of reserved numeric values. Reserved values may not be used by
+// entries in the same enum. Reserved ranges may not overlap.
+//
+// Note that this is distinct from DescriptorProto.ReservedRange in that it
+// is inclusive such that it can appropriately represent the entire int32
+// domain.
+type EnumDescriptorProto_EnumReservedRange struct {
+	Start            *int32 `protobuf:"varint,1,opt,name=start" json:"start,omitempty"`
+	End              *int32 `protobuf:"varint,2,opt,name=end" json:"end,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *EnumDescriptorProto_EnumReservedRange) Reset()         { *m = EnumDescriptorProto_EnumReservedRange{} }
+func (m *EnumDescriptorProto_EnumReservedRange) String() string { return proto.CompactTextString(m) }
+func (*EnumDescriptorProto_EnumReservedRange) ProtoMessage()    {}
+func (*EnumDescriptorProto_EnumReservedRange) Descriptor() ([]byte, []int) {
+	return fileDescriptorDescriptor, []int{6, 0}
+}
+
+func (m *EnumDescriptorProto_EnumReservedRange) GetStart() int32 {
+	if m != nil && m.Start != nil {
+		return *m.Start
+	}
+	return 0
+}
+
+func (m *EnumDescriptorProto_EnumReservedRange) GetEnd() int32 {
+	if m != nil && m.End != nil {
+		return *m.End
+	}
+	return 0
+}
+
 // Describes a value within an enum.
 type EnumValueDescriptorProto struct {
 	Name             *string           `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
@@ -1020,7 +1074,7 @@ type FileOptions struct {
 	CcGenericServices   *bool `protobuf:"varint,16,opt,name=cc_generic_services,json=ccGenericServices,def=0" json:"cc_generic_services,omitempty"`
 	JavaGenericServices *bool `protobuf:"varint,17,opt,name=java_generic_services,json=javaGenericServices,def=0" json:"java_generic_services,omitempty"`
 	PyGenericServices   *bool `protobuf:"varint,18,opt,name=py_generic_services,json=pyGenericServices,def=0" json:"py_generic_services,omitempty"`
-	PhpGenericServices  *bool `protobuf:"varint,19,opt,name=php_generic_services,json=phpGenericServices,def=0" json:"php_generic_services,omitempty"`
+	PhpGenericServices  *bool `protobuf:"varint,42,opt,name=php_generic_services,json=phpGenericServices,def=0" json:"php_generic_services,omitempty"`
 	// Is this file deprecated?
 	// Depending on the target platform, this can emit Deprecated annotations
 	// for everything in the file, or it will be completely ignored; in the very
@@ -2037,6 +2091,7 @@ func init() {
 	proto.RegisterType((*FieldDescriptorProto)(nil), "google.protobuf.FieldDescriptorProto")
 	proto.RegisterType((*OneofDescriptorProto)(nil), "google.protobuf.OneofDescriptorProto")
 	proto.RegisterType((*EnumDescriptorProto)(nil), "google.protobuf.EnumDescriptorProto")
+	proto.RegisterType((*EnumDescriptorProto_EnumReservedRange)(nil), "google.protobuf.EnumDescriptorProto.EnumReservedRange")
 	proto.RegisterType((*EnumValueDescriptorProto)(nil), "google.protobuf.EnumValueDescriptorProto")
 	proto.RegisterType((*ServiceDescriptorProto)(nil), "google.protobuf.ServiceDescriptorProto")
 	proto.RegisterType((*MethodDescriptorProto)(nil), "google.protobuf.MethodDescriptorProto")
@@ -2065,159 +2120,161 @@ func init() {
 func init() { proto.RegisterFile("descriptor.proto", fileDescriptorDescriptor) }
 
 var fileDescriptorDescriptor = []byte{
-	// 2451 bytes of a gzipped FileDescriptorProto
+	// 2487 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xc4, 0x59, 0xcd, 0x6f, 0xdb, 0xc8,
-	0x15, 0x5f, 0x7d, 0x5a, 0x7a, 0x92, 0xe5, 0xf1, 0xd8, 0x9b, 0x30, 0xce, 0x66, 0xe3, 0x28, 0xc9,
+	0x15, 0x5f, 0x7d, 0x5a, 0x7a, 0x92, 0xe5, 0xf1, 0xd8, 0x9b, 0x30, 0xde, 0x8f, 0x38, 0xda, 0x8f,
-	0xc6, 0x49, 0x5a, 0x65, 0xe1, 0x7c, 0xae, 0xb7, 0xd8, 0x56, 0x96, 0x18, 0xaf, 0x52, 0x59, 0x52,
+	0x38, 0x49, 0xab, 0x2c, 0x9c, 0xc4, 0xc9, 0x3a, 0xc5, 0xb6, 0xb2, 0xc4, 0x78, 0x95, 0xca, 0x92,
-	0x29, 0xb9, 0x9b, 0xec, 0x85, 0x18, 0x93, 0x23, 0x89, 0x09, 0x45, 0x72, 0x49, 0x2a, 0x89, 0x83,
+	0x4a, 0xc9, 0xdd, 0x64, 0x8b, 0x82, 0x18, 0x93, 0x23, 0x89, 0x09, 0x45, 0x72, 0x49, 0x2a, 0x89,
-	0x1e, 0x02, 0xf4, 0xd4, 0xff, 0xa0, 0x28, 0x8a, 0x1e, 0xf6, 0xb2, 0x40, 0xaf, 0x05, 0x0a, 0xb4,
+	0x83, 0x1e, 0x02, 0xf4, 0xd4, 0xff, 0xa0, 0x28, 0x8a, 0x1e, 0x7a, 0x59, 0xa0, 0xd7, 0x02, 0x05,
-	0xf7, 0x5e, 0x0b, 0xf4, 0xde, 0x43, 0x0f, 0x05, 0xda, 0x3f, 0xa3, 0x98, 0x19, 0x92, 0xa2, 0xbe,
+	0xda, 0x7b, 0xaf, 0x05, 0x7a, 0xef, 0xa1, 0x40, 0x0b, 0xb4, 0x7f, 0x42, 0x8f, 0xc5, 0xcc, 0x90,
-	0x12, 0x77, 0x81, 0x64, 0x4f, 0xf6, 0xfc, 0xde, 0xef, 0xbd, 0x79, 0xf3, 0xf8, 0x66, 0xde, 0x9b,
+	0x14, 0xf5, 0x95, 0x78, 0x17, 0x48, 0xf6, 0x64, 0xcf, 0xef, 0xfd, 0xde, 0xe3, 0x9b, 0x37, 0x6f,
-	0x11, 0x20, 0x9d, 0x7a, 0x9a, 0x6b, 0x38, 0xbe, 0xed, 0x56, 0x1c, 0xd7, 0xf6, 0x6d, 0xbc, 0x36,
+	0xde, 0xbc, 0x19, 0x01, 0xd2, 0xa9, 0xa7, 0xb9, 0x86, 0xe3, 0xdb, 0x6e, 0xc5, 0x71, 0x6d, 0xdf,
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+	0xc6, 0x6b, 0x03, 0xdb, 0x1e, 0x98, 0x54, 0x8c, 0x4e, 0xc6, 0xfd, 0xf2, 0x11, 0xac, 0xdf, 0x33,
-	0x88, 0xd8, 0xa5, 0x3e, 0x7e, 0x00, 0xe9, 0xbe, 0x61, 0x52, 0x29, 0xb1, 0x9d, 0xda, 0x29, 0xec,
+	0x4c, 0x5a, 0x8f, 0x88, 0x5d, 0xea, 0xe3, 0x3b, 0x90, 0xee, 0x1b, 0x26, 0x95, 0x12, 0xdb, 0xa9,
-	0x5e, 0xa9, 0xcc, 0x28, 0x55, 0xa6, 0x35, 0x3a, 0x0c, 0x56, 0xb8, 0x46, 0xf9, 0xdf, 0x69, 0xd8,
+	0x9d, 0xc2, 0xee, 0x87, 0x95, 0x19, 0xa5, 0xca, 0xb4, 0x46, 0x87, 0xc1, 0x0a, 0xd7, 0x28, 0xff,
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+	0x3b, 0x0d, 0x1b, 0x0b, 0xa4, 0x18, 0x43, 0xda, 0x22, 0x23, 0x66, 0x31, 0xb1, 0x93, 0x57, 0xf8,
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+	0xff, 0x58, 0x82, 0x15, 0x87, 0x68, 0x8f, 0xc9, 0x80, 0x4a, 0x49, 0x0e, 0x87, 0x43, 0xfc, 0x3e,
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+	0x80, 0x4e, 0x1d, 0x6a, 0xe9, 0xd4, 0xd2, 0x4e, 0xa5, 0xd4, 0x76, 0x6a, 0x27, 0xaf, 0xc4, 0x10,
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+	0x7c, 0x0d, 0xd6, 0x9d, 0xf1, 0x89, 0x69, 0x68, 0x6a, 0x8c, 0x06, 0xdb, 0xa9, 0x9d, 0x8c, 0x82,
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+	0x84, 0xa0, 0x3e, 0x21, 0x5f, 0x86, 0xb5, 0xa7, 0x94, 0x3c, 0x8e, 0x53, 0x0b, 0x9c, 0x5a, 0x62,
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+	0x70, 0x8c, 0x58, 0x83, 0xe2, 0x88, 0x7a, 0x1e, 0x19, 0x50, 0xd5, 0x3f, 0x75, 0xa8, 0x94, 0xe6,
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+	0x3b, 0xbe, 0x61, 0x5b, 0x9e, 0x94, 0xdb, 0x4e, 0xec, 0x14, 0x76, 0xdf, 0x5d, 0x98, 0x08, 0x6d,
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+	0xc1, 0x51, 0x42, 0x32, 0x6e, 0x00, 0xf2, 0xec, 0xb1, 0xab, 0x51, 0x55, 0xb3, 0x75, 0xaa, 0x1a,
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+	0x08, 0x2c, 0xa2, 0x04, 0xfd, 0xf4, 0xe4, 0x59, 0xa9, 0xa8, 0x14, 0x04, 0x26, 0x28, 0x97, 0x61,
-	0x56, 0x28, 0xbc, 0x04, 0x45, 0xc3, 0x53, 0x27, 0x8f, 0xcc, 0xc9, 0xed, 0xe4, 0x4e, 0x4e, 0x29,
+	0x8d, 0x0c, 0x06, 0x2e, 0x33, 0x1e, 0x1a, 0x12, 0x37, 0x84, 0x52, 0x04, 0x73, 0xe2, 0xd6, 0x7d,
-	0x18, 0x5e, 0xf4, 0x40, 0x57, 0xfe, 0x2e, 0x09, 0xa5, 0xe9, 0x47, 0x72, 0x5c, 0x87, 0x9c, 0x69,
+	0xc8, 0x85, 0x71, 0x60, 0x47, 0x32, 0x8b, 0x84, 0xea, 0x88, 0x6b, 0x6f, 0x72, 0x27, 0xaf, 0xe4,
-	0x6b, 0x84, 0xa7, 0x96, 0xf8, 0x85, 0x66, 0xe7, 0x2d, 0xef, 0xea, 0x95, 0x66, 0xc0, 0x57, 0x22,
+	0xac, 0x50, 0x78, 0x09, 0x8a, 0x86, 0xa7, 0x4e, 0x5e, 0xc9, 0x93, 0xdb, 0xc9, 0x9d, 0x9c, 0x52,
-	0xcd, 0xad, 0xbf, 0x27, 0x20, 0x17, 0xc2, 0xf8, 0x0c, 0xa4, 0x1d, 0xe2, 0x0f, 0xb9, 0xb9, 0xcc,
+	0x30, 0xbc, 0xe8, 0x85, 0xb1, 0xfc, 0x75, 0x12, 0x4a, 0xd3, 0xaf, 0xfc, 0xb8, 0x0e, 0x39, 0xd3,
-	0x7e, 0x12, 0x25, 0x14, 0x3e, 0x66, 0xb8, 0xe7, 0x10, 0x8b, 0xa7, 0x40, 0x80, 0xb3, 0x31, 0xfb,
+	0xd6, 0x08, 0x4f, 0x2d, 0xf1, 0x13, 0xd3, 0xce, 0x2b, 0x7e, 0x18, 0xa8, 0x34, 0x03, 0xbe, 0x12,
-	0xae, 0x26, 0x25, 0x3a, 0xbf, 0x7e, 0xd8, 0xa3, 0x11, 0xb5, 0x7c, 0x2f, 0xfc, 0xae, 0x01, 0x5e,
+	0x69, 0x6e, 0xfd, 0x2d, 0x01, 0xb9, 0x10, 0xc6, 0xe7, 0x20, 0xed, 0x10, 0x7f, 0xc8, 0xcd, 0x65,
-	0x0b, 0x60, 0x7c, 0x13, 0xd6, 0x7d, 0x97, 0x18, 0xe6, 0x14, 0x37, 0xcd, 0xb9, 0x28, 0x14, 0x44,
+	0x0e, 0x92, 0x28, 0xa1, 0xf0, 0x31, 0xc3, 0x3d, 0x87, 0x58, 0x3c, 0x05, 0x02, 0x9c, 0x8d, 0xd9,
-	0xe4, 0x3d, 0x38, 0x17, 0xda, 0xd5, 0xa9, 0x4f, 0xb4, 0x21, 0xd5, 0x27, 0x4a, 0x59, 0xfe, 0x02,
+	0xba, 0x9a, 0x94, 0xe8, 0xfc, 0xfa, 0x61, 0x8f, 0x46, 0xd4, 0xf2, 0xbd, 0x70, 0x5d, 0x03, 0xbc,
-	0x7b, 0x36, 0x20, 0xd4, 0x03, 0x79, 0xa8, 0x5b, 0xfe, 0x47, 0x02, 0xd6, 0xc3, 0x0b, 0x93, 0x1e,
+	0x16, 0xc0, 0xf8, 0x1a, 0xac, 0xfb, 0x2e, 0x31, 0xcc, 0x29, 0x6e, 0x9a, 0x73, 0x51, 0x28, 0x88,
-	0x05, 0xeb, 0x10, 0x80, 0x58, 0x96, 0xed, 0xc7, 0xc3, 0x35, 0x9f, 0xca, 0x73, 0x7a, 0x95, 0x6a,
+	0xc8, 0xfb, 0x70, 0x21, 0xb4, 0xab, 0x53, 0x9f, 0x68, 0x43, 0xaa, 0x4f, 0x94, 0xb2, 0xfc, 0x99,
-	0xa4, 0xa4, 0xc4, 0x0c, 0x6c, 0x8d, 0x00, 0x26, 0x92, 0xa5, 0x61, 0xbb, 0x08, 0x85, 0xe0, 0x17,
+	0xe1, 0x7c, 0x40, 0xa8, 0x07, 0xf2, 0x50, 0xb7, 0xfc, 0xf7, 0x04, 0xac, 0x87, 0x17, 0x26, 0x3d,
-	0x10, 0xfe, 0x33, 0x9a, 0xb8, 0x62, 0x83, 0x80, 0xd8, 0xcd, 0x0a, 0x6f, 0x42, 0xe6, 0x98, 0x0e,
+	0x0a, 0xd6, 0x11, 0x00, 0xb1, 0x2c, 0xdb, 0x8f, 0x87, 0x6b, 0x3e, 0x95, 0xe7, 0xf4, 0x2a, 0xd5,
-	0x0c, 0x2b, 0x78, 0xd7, 0x14, 0x83, 0xf0, 0xad, 0x36, 0x1d, 0xbd, 0xd5, 0xee, 0x3f, 0x86, 0x0d,
+	0x48, 0x49, 0x89, 0x19, 0xd8, 0x1a, 0x01, 0x4c, 0x24, 0x4b, 0xc3, 0x76, 0x11, 0x0a, 0xc1, 0x4f,
-	0xcd, 0x1e, 0xcd, 0xba, 0xbb, 0x8f, 0x66, 0xae, 0xf9, 0xde, 0x97, 0x89, 0xaf, 0x61, 0xd2, 0x62,
+	0x38, 0xfc, 0x77, 0x40, 0x71, 0xc5, 0x06, 0x01, 0xb1, 0x9b, 0x15, 0xde, 0x84, 0xcc, 0x09, 0x1d,
-	0x7e, 0x9b, 0x4c, 0x1d, 0x74, 0xf6, 0xff, 0x98, 0xdc, 0x3a, 0x10, 0x7a, 0x9d, 0x70, 0x99, 0x0a,
+	0x18, 0x56, 0xf0, 0x30, 0x2b, 0x06, 0xe1, 0x43, 0x48, 0x3a, 0x7a, 0x08, 0x39, 0xf8, 0x19, 0x6c,
-	0xed, 0x9b, 0x54, 0x63, 0xae, 0xff, 0x2f, 0x00, 0x00, 0xff, 0xff, 0x6b, 0x03, 0xf1, 0x99, 0x1b,
+	0x68, 0xf6, 0x68, 0xd6, 0xdd, 0x03, 0x34, 0x73, 0xcd, 0xf7, 0x3e, 0x4f, 0x7c, 0x09, 0x93, 0x16,
-	0x1c, 0x00, 0x00,
+	0xf3, 0x7f, 0x89, 0xc4, 0xef, 0x93, 0xa9, 0xc3, 0xce, 0xc1, 0x1f, 0x92, 0x5b, 0x87, 0x42, 0xb5,
+	0x13, 0xce, 0x54, 0xa1, 0x7d, 0x93, 0x6a, 0xcc, 0xfb, 0xff, 0x07, 0x00, 0x00, 0xff, 0xff, 0xa3,
+	0x58, 0x22, 0x30, 0xdf, 0x1c, 0x00, 0x00,
 }

vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor_gostring.gen.go

@@ -34,11 +34,10 @@ package descriptor
 
 import fmt "fmt"
 import strings "strings"
-import github_com_gogo_protobuf_proto "github.com/gogo/protobuf/proto"
+import proto "github.com/gogo/protobuf/proto"
 import sort "sort"
 import strconv "strconv"
 import reflect "reflect"
-import proto "github.com/gogo/protobuf/proto"
 import math "math"
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -270,7 +269,7 @@ func (this *EnumDescriptorProto) GoString() string {
 	if this == nil {
 		return "nil"
 	}
-	s := make([]string, 0, 7)
+	s := make([]string, 0, 9)
 	s = append(s, "&descriptor.EnumDescriptorProto{")
 	if this.Name != nil {
 		s = append(s, "Name: "+valueToGoStringDescriptor(this.Name, "string")+",\n")
@@ -281,6 +280,30 @@ func (this *EnumDescriptorProto) GoString() string {
 	if this.Options != nil {
 		s = append(s, "Options: "+fmt.Sprintf("%#v", this.Options)+",\n")
 	}
+	if this.ReservedRange != nil {
+		s = append(s, "ReservedRange: "+fmt.Sprintf("%#v", this.ReservedRange)+",\n")
+	}
+	if this.ReservedName != nil {
+		s = append(s, "ReservedName: "+fmt.Sprintf("%#v", this.ReservedName)+",\n")
+	}
+	if this.XXX_unrecognized != nil {
+		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
+	}
+	s = append(s, "}")
+	return strings.Join(s, "")
+}
+func (this *EnumDescriptorProto_EnumReservedRange) GoString() string {
+	if this == nil {
+		return "nil"
+	}
+	s := make([]string, 0, 6)
+	s = append(s, "&descriptor.EnumDescriptorProto_EnumReservedRange{")
+	if this.Start != nil {
+		s = append(s, "Start: "+valueToGoStringDescriptor(this.Start, "int32")+",\n")
+	}
+	if this.End != nil {
+		s = append(s, "End: "+valueToGoStringDescriptor(this.End, "int32")+",\n")
+	}
 	if this.XXX_unrecognized != nil {
 		s = append(s, "XXX_unrecognized:"+fmt.Sprintf("%#v", this.XXX_unrecognized)+",\n")
 	}
@@ -729,8 +752,8 @@ func valueToGoStringDescriptor(v interface{}, typ string) string {
 	pv := reflect.Indirect(rv).Interface()
 	return fmt.Sprintf("func(v %v) *%v { return &v } ( %#v )", typ, typ, pv)
 }
-func extensionToGoStringDescriptor(m github_com_gogo_protobuf_proto.Message) string {
+func extensionToGoStringDescriptor(m proto.Message) string {
-	e := github_com_gogo_protobuf_proto.GetUnsafeExtensionsMap(m)
+	e := proto.GetUnsafeExtensionsMap(m)
 	if e == nil {
 		return "nil"
 	}

vendor/github.com/gogo/protobuf/test/issue270/a/a1.proto

@@ -0,0 +1,12 @@
+syntax = "proto2";
+
+package issue270.a;
+
+import "github.com/gogo/protobuf/gogoproto/gogo.proto";
+import "github.com/gogo/protobuf/test/issue270/a/a2.proto";
+
+option (gogoproto.populate_all) = true;
+
+message A1 {
+    optional A2 a2 = 1;
+}

vendor/github.com/gogo/protobuf/test/issue270/a/a2.proto

@@ -0,0 +1,12 @@
+syntax = "proto2";
+
+package issue270.a;
+
+import "github.com/gogo/protobuf/gogoproto/gogo.proto";
+import "github.com/gogo/protobuf/test/issue270/b/b.proto";
+
+option (gogoproto.populate_all) = true;
+
+message A2 {
+    optional issue270.b.B b = 1;
+}

vendor/github.com/gogo/protobuf/test/issue270/b/b.proto

@@ -0,0 +1,6 @@
+syntax = "proto2";
+
+package issue270.b;
+
+message B {
+}

vendor/github.com/gogo/protobuf/types/any.pb.go

@@ -202,10 +202,7 @@ func (this *Any) Compare(that interface{}) int {
 }
 func (this *Any) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Any)
@@ -218,10 +215,7 @@ func (this *Any) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}

vendor/github.com/gogo/protobuf/types/duration.pb.go

@@ -169,10 +169,7 @@ func (this *Duration) Compare(that interface{}) int {
 }
 func (this *Duration) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Duration)
@@ -185,10 +182,7 @@ func (this *Duration) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}

vendor/github.com/gogo/protobuf/types/empty.pb.go

@@ -81,10 +81,7 @@ func (this *Empty) Compare(that interface{}) int {
 }
 func (this *Empty) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Empty)
@@ -97,10 +94,7 @@ func (this *Empty) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}

vendor/github.com/gogo/protobuf/types/field_mask.pb.go

@@ -295,10 +295,7 @@ func (this *FieldMask) Compare(that interface{}) int {
 }
 func (this *FieldMask) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*FieldMask)
@@ -311,10 +308,7 @@ func (this *FieldMask) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}

vendor/github.com/gogo/protobuf/types/struct.pb.go

@@ -22,9 +22,9 @@ import strconv "strconv"
 
 import strings "strings"
 import reflect "reflect"
-import github_com_gogo_protobuf_sortkeys "github.com/gogo/protobuf/sortkeys"
+import sortkeys "github.com/gogo/protobuf/sortkeys"
 
-import encoding_binary "encoding/binary"
+import binary "encoding/binary"
 
 import io "io"
 
@@ -361,10 +361,7 @@ func (x NullValue) String() string {
 }
 func (this *Struct) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Struct)
@@ -377,10 +374,7 @@ func (this *Struct) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -396,10 +390,7 @@ func (this *Struct) Equal(that interface{}) bool {
 }
 func (this *Value) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Value)
@@ -412,10 +403,7 @@ func (this *Value) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -432,10 +420,7 @@ func (this *Value) Equal(that interface{}) bool {
 }
 func (this *Value_NullValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Value_NullValue)
@@ -448,10 +433,7 @@ func (this *Value_NullValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -462,10 +444,7 @@ func (this *Value_NullValue) Equal(that interface{}) bool {
 }
 func (this *Value_NumberValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Value_NumberValue)
@@ -478,10 +457,7 @@ func (this *Value_NumberValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -492,10 +468,7 @@ func (this *Value_NumberValue) Equal(that interface{}) bool {
 }
 func (this *Value_StringValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Value_StringValue)
@@ -508,10 +481,7 @@ func (this *Value_StringValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -522,10 +492,7 @@ func (this *Value_StringValue) Equal(that interface{}) bool {
 }
 func (this *Value_BoolValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Value_BoolValue)
@@ -538,10 +505,7 @@ func (this *Value_BoolValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -552,10 +516,7 @@ func (this *Value_BoolValue) Equal(that interface{}) bool {
 }
 func (this *Value_StructValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Value_StructValue)
@@ -568,10 +529,7 @@ func (this *Value_StructValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -582,10 +540,7 @@ func (this *Value_StructValue) Equal(that interface{}) bool {
 }
 func (this *Value_ListValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Value_ListValue)
@@ -598,10 +553,7 @@ func (this *Value_ListValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -612,10 +564,7 @@ func (this *Value_ListValue) Equal(that interface{}) bool {
 }
 func (this *ListValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*ListValue)
@@ -628,10 +577,7 @@ func (this *ListValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -655,7 +601,7 @@ func (this *Struct) GoString() string {
 	for k := range this.Fields {
 		keysForFields = append(keysForFields, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForFields)
+	sortkeys.Strings(keysForFields)
 	mapStringForFields := "map[string]*Value{"
 	for _, k := range keysForFields {
 		mapStringForFields += fmt.Sprintf("%#v: %#v,", k, this.Fields[k])
@@ -829,7 +775,7 @@ func (m *Value_NumberValue) MarshalTo(dAtA []byte) (int, error) {
 	i := 0
 	dAtA[i] = 0x11
 	i++
-	encoding_binary.LittleEndian.PutUint64(dAtA[i:], uint64(math.Float64bits(float64(m.NumberValue))))
+	binary.LittleEndian.PutUint64(dAtA[i:], uint64(math.Float64bits(float64(m.NumberValue))))
 	i += 8
 	return i, nil
 }
@@ -1179,7 +1125,7 @@ func (this *Struct) String() string {
 	for k := range this.Fields {
 		keysForFields = append(keysForFields, k)
 	}
-	github_com_gogo_protobuf_sortkeys.Strings(keysForFields)
+	sortkeys.Strings(keysForFields)
 	mapStringForFields := "map[string]*Value{"
 	for _, k := range keysForFields {
 		mapStringForFields += fmt.Sprintf("%v: %v,", k, this.Fields[k])
@@ -1509,7 +1455,7 @@ func (m *Value) Unmarshal(dAtA []byte) error {
 			if (iNdEx + 8) > l {
 				return io.ErrUnexpectedEOF
 			}
-			v = uint64(encoding_binary.LittleEndian.Uint64(dAtA[iNdEx:]))
+			v = uint64(binary.LittleEndian.Uint64(dAtA[iNdEx:]))
 			iNdEx += 8
 			m.Kind = &Value_NumberValue{float64(math.Float64frombits(v))}
 		case 3:

vendor/github.com/gogo/protobuf/types/timestamp.pb.go

@@ -185,10 +185,7 @@ func (this *Timestamp) Compare(that interface{}) int {
 }
 func (this *Timestamp) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Timestamp)
@@ -201,10 +198,7 @@ func (this *Timestamp) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}

vendor/github.com/gogo/protobuf/types/wrappers.pb.go

@@ -29,7 +29,7 @@ import bytes "bytes"
 import strings "strings"
 import reflect "reflect"
 
-import encoding_binary "encoding/binary"
+import binary "encoding/binary"
 
 import io "io"
 
@@ -531,10 +531,7 @@ func (this *BytesValue) Compare(that interface{}) int {
 }
 func (this *DoubleValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*DoubleValue)
@@ -547,10 +544,7 @@ func (this *DoubleValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -561,10 +555,7 @@ func (this *DoubleValue) Equal(that interface{}) bool {
 }
 func (this *FloatValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*FloatValue)
@@ -577,10 +568,7 @@ func (this *FloatValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -591,10 +579,7 @@ func (this *FloatValue) Equal(that interface{}) bool {
 }
 func (this *Int64Value) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Int64Value)
@@ -607,10 +592,7 @@ func (this *Int64Value) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -621,10 +603,7 @@ func (this *Int64Value) Equal(that interface{}) bool {
 }
 func (this *UInt64Value) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*UInt64Value)
@@ -637,10 +616,7 @@ func (this *UInt64Value) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -651,10 +627,7 @@ func (this *UInt64Value) Equal(that interface{}) bool {
 }
 func (this *Int32Value) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*Int32Value)
@@ -667,10 +640,7 @@ func (this *Int32Value) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -681,10 +651,7 @@ func (this *Int32Value) Equal(that interface{}) bool {
 }
 func (this *UInt32Value) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*UInt32Value)
@@ -697,10 +664,7 @@ func (this *UInt32Value) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -711,10 +675,7 @@ func (this *UInt32Value) Equal(that interface{}) bool {
 }
 func (this *BoolValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*BoolValue)
@@ -727,10 +688,7 @@ func (this *BoolValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -741,10 +699,7 @@ func (this *BoolValue) Equal(that interface{}) bool {
 }
 func (this *StringValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*StringValue)
@@ -757,10 +712,7 @@ func (this *StringValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -771,10 +723,7 @@ func (this *StringValue) Equal(that interface{}) bool {
 }
 func (this *BytesValue) Equal(that interface{}) bool {
 	if that == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	}
 
 	that1, ok := that.(*BytesValue)
@@ -787,10 +736,7 @@ func (this *BytesValue) Equal(that interface{}) bool {
 		}
 	}
 	if that1 == nil {
-		if this == nil {
+		return this == nil
-			return true
-		}
-		return false
 	} else if this == nil {
 		return false
 	}
@@ -915,7 +861,7 @@ func (m *DoubleValue) MarshalTo(dAtA []byte) (int, error) {
 	if m.Value != 0 {
 		dAtA[i] = 0x9
 		i++
-		encoding_binary.LittleEndian.PutUint64(dAtA[i:], uint64(math.Float64bits(float64(m.Value))))
+		binary.LittleEndian.PutUint64(dAtA[i:], uint64(math.Float64bits(float64(m.Value))))
 		i += 8
 	}
 	return i, nil
@@ -939,7 +885,7 @@ func (m *FloatValue) MarshalTo(dAtA []byte) (int, error) {
 	if m.Value != 0 {
 		dAtA[i] = 0xd
 		i++
-		encoding_binary.LittleEndian.PutUint32(dAtA[i:], uint32(math.Float32bits(float32(m.Value))))
+		binary.LittleEndian.PutUint32(dAtA[i:], uint32(math.Float32bits(float32(m.Value))))
 		i += 4
 	}
 	return i, nil
@@ -1513,7 +1459,7 @@ func (m *DoubleValue) Unmarshal(dAtA []byte) error {
 			if (iNdEx + 8) > l {
 				return io.ErrUnexpectedEOF
 			}
-			v = uint64(encoding_binary.LittleEndian.Uint64(dAtA[iNdEx:]))
+			v = uint64(binary.LittleEndian.Uint64(dAtA[iNdEx:]))
 			iNdEx += 8
 			m.Value = float64(math.Float64frombits(v))
 		default:
@@ -1574,7 +1520,7 @@ func (m *FloatValue) Unmarshal(dAtA []byte) error {
 			if (iNdEx + 4) > l {
 				return io.ErrUnexpectedEOF
 			}
-			v = uint32(encoding_binary.LittleEndian.Uint32(dAtA[iNdEx:]))
+			v = uint32(binary.LittleEndian.Uint32(dAtA[iNdEx:]))
 			iNdEx += 4
 			m.Value = float32(math.Float32frombits(v))
 		default:

vendor/google.golang.org/grpc/README.md

@@ -1,6 +1,6 @@
 # gRPC-Go
 
-[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) [![GoDoc](https://godoc.org/google.golang.org/grpc?status.svg)](https://godoc.org/google.golang.org/grpc)
+[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) [![GoDoc](https://godoc.org/google.golang.org/grpc?status.svg)](https://godoc.org/google.golang.org/grpc) [![GoReportCard](https://goreportcard.com/badge/grpc/grpc-go)](https://goreportcard.com/report/github.com/grpc/grpc-go)
 
 The Go implementation of [gRPC](https://grpc.io/): A high performance, open source, general RPC framework that puts mobile and HTTP/2 first. For more information see the [gRPC Quick Start: Go](https://grpc.io/docs/quickstart/go.html) guide.
 
@@ -16,7 +16,8 @@ $ go get -u google.golang.org/grpc
 Prerequisites
 -------------
 
-This requires Go 1.7 or later.
+This requires Go 1.6 or later.  Go 1.7 will be required as of the next gRPC-Go
+release (1.8).
 
 Constraints
 -----------

vendor/google.golang.org/grpc/backoff.go

@@ -25,14 +25,12 @@ import (
 
 // DefaultBackoffConfig uses values specified for backoff in
 // https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
-var (
+var DefaultBackoffConfig = BackoffConfig{
-	DefaultBackoffConfig = BackoffConfig{
+	MaxDelay:  120 * time.Second,
-		MaxDelay:  120 * time.Second,
+	baseDelay: 1.0 * time.Second,
-		baseDelay: 1.0 * time.Second,
+	factor:    1.6,
-		factor:    1.6,
+	jitter:    0.2,
-		jitter:    0.2,
+}
-	}
-)
 
 // backoffStrategy defines the methodology for backing off after a grpc
 // connection failure.

vendor/google.golang.org/grpc/balancer.go

@@ -28,6 +28,7 @@ import (
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/naming"
+	"google.golang.org/grpc/status"
 )
 
 // Address represents a server the client connects to.
@@ -310,7 +311,7 @@ func (rr *roundRobin) Get(ctx context.Context, opts BalancerGetOptions) (addr Ad
 	if !opts.BlockingWait {
 		if len(rr.addrs) == 0 {
 			rr.mu.Unlock()
-			err = Errorf(codes.Unavailable, "there is no address available")
+			err = status.Errorf(codes.Unavailable, "there is no address available")
 			return
 		}
 		// Returns the next addr on rr.addrs for failfast RPCs.

vendor/google.golang.org/grpc/balancer/balancer.go

@@ -23,6 +23,7 @@ package balancer
 import (
 	"errors"
 	"net"
+	"strings"
 
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/connectivity"
@@ -33,24 +34,23 @@ import (
 var (
 	// m is a map from name to balancer builder.
 	m = make(map[string]Builder)
-	// defaultBuilder is the default balancer to use.
-	defaultBuilder Builder // TODO(bar) install pickfirst as default.
 )
 
 // Register registers the balancer builder to the balancer map.
-// b.Name will be used as the name registered with this builder.
+// b.Name (lowercased) will be used as the name registered with
+// this builder.
 func Register(b Builder) {
-	m[b.Name()] = b
+	m[strings.ToLower(b.Name())] = b
 }
 
 // Get returns the resolver builder registered with the given name.
-// If no builder is register with the name, the default pickfirst will
+// Note that the compare is done in a case-insenstive fashion.
-// be used.
+// If no builder is register with the name, nil will be returned.
 func Get(name string) Builder {
-	if b, ok := m[name]; ok {
+	if b, ok := m[strings.ToLower(name)]; ok {
 		return b
 	}
-	return defaultBuilder
+	return nil
 }
 
 // SubConn represents a gRPC sub connection.
@@ -66,6 +66,11 @@ func Get(name string) Builder {
 // When the connection encounters an error, it will reconnect immediately.
 // When the connection becomes IDLE, it will not reconnect unless Connect is
 // called.
+//
+// This interface is to be implemented by gRPC. Users should not need a
+// brand new implementation of this interface. For the situations like
+// testing, the new implementation should embed this interface. This allows
+// gRPC to add new methods to this interface.
 type SubConn interface {
 	// UpdateAddresses updates the addresses used in this SubConn.
 	// gRPC checks if currently-connected address is still in the new list.
@@ -83,6 +88,11 @@ type SubConn interface {
 type NewSubConnOptions struct{}
 
 // ClientConn represents a gRPC ClientConn.
+//
+// This interface is to be implemented by gRPC. Users should not need a
+// brand new implementation of this interface. For the situations like
+// testing, the new implementation should embed this interface. This allows
+// gRPC to add new methods to this interface.
 type ClientConn interface {
 	// NewSubConn is called by balancer to create a new SubConn.
 	// It doesn't block and wait for the connections to be established.
@@ -99,6 +109,9 @@ type ClientConn interface {
 	// on the new picker to pick new SubConn.
 	UpdateBalancerState(s connectivity.State, p Picker)
 
+	// ResolveNow is called by balancer to notify gRPC to do a name resolving.
+	ResolveNow(resolver.ResolveNowOption)
+
 	// Target returns the dial target for this ClientConn.
 	Target() string
 }
@@ -131,6 +144,10 @@ type PickOptions struct{}
 type DoneInfo struct {
 	// Err is the rpc error the RPC finished with. It could be nil.
 	Err error
+	// BytesSent indicates if any bytes have been sent to the server.
+	BytesSent bool
+	// BytesReceived indicates if any byte has been received from the server.
+	BytesReceived bool
 }
 
 var (
@@ -161,7 +178,7 @@ type Picker interface {
 	// If a SubConn is returned:
 	// - If it is READY, gRPC will send the RPC on it;
 	// - If it is not ready, or becomes not ready after it's returned, gRPC will block
-	//   this call until a new picker is updated and will call pick on the new picker.
+	//   until UpdateBalancerState() is called and will call pick on the new picker.
 	//
 	// If the returned error is not nil:
 	// - If the error is ErrNoSubConnAvailable, gRPC will block until UpdateBalancerState()

vendor/google.golang.org/grpc/balancer/base/balancer.go

@@ -0,0 +1,209 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package base
+
+import (
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/connectivity"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/resolver"
+)
+
+type baseBuilder struct {
+	name          string
+	pickerBuilder PickerBuilder
+}
+
+func (bb *baseBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
+	return &baseBalancer{
+		cc:            cc,
+		pickerBuilder: bb.pickerBuilder,
+
+		subConns: make(map[resolver.Address]balancer.SubConn),
+		scStates: make(map[balancer.SubConn]connectivity.State),
+		csEvltr:  &connectivityStateEvaluator{},
+		// Initialize picker to a picker that always return
+		// ErrNoSubConnAvailable, because when state of a SubConn changes, we
+		// may call UpdateBalancerState with this picker.
+		picker: NewErrPicker(balancer.ErrNoSubConnAvailable),
+	}
+}
+
+func (bb *baseBuilder) Name() string {
+	return bb.name
+}
+
+type baseBalancer struct {
+	cc            balancer.ClientConn
+	pickerBuilder PickerBuilder
+
+	csEvltr *connectivityStateEvaluator
+	state   connectivity.State
+
+	subConns map[resolver.Address]balancer.SubConn
+	scStates map[balancer.SubConn]connectivity.State
+	picker   balancer.Picker
+}
+
+func (b *baseBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
+	if err != nil {
+		grpclog.Infof("base.baseBalancer: HandleResolvedAddrs called with error %v", err)
+		return
+	}
+	grpclog.Infoln("base.baseBalancer: got new resolved addresses: ", addrs)
+	// addrsSet is the set converted from addrs, it's used for quick lookup of an address.
+	addrsSet := make(map[resolver.Address]struct{})
+	for _, a := range addrs {
+		addrsSet[a] = struct{}{}
+		if _, ok := b.subConns[a]; !ok {
+			// a is a new address (not existing in b.subConns).
+			sc, err := b.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{})
+			if err != nil {
+				grpclog.Warningf("base.baseBalancer: failed to create new SubConn: %v", err)
+				continue
+			}
+			b.subConns[a] = sc
+			b.scStates[sc] = connectivity.Idle
+			sc.Connect()
+		}
+	}
+	for a, sc := range b.subConns {
+		// a was removed by resolver.
+		if _, ok := addrsSet[a]; !ok {
+			b.cc.RemoveSubConn(sc)
+			delete(b.subConns, a)
+			// Keep the state of this sc in b.scStates until sc's state becomes Shutdown.
+			// The entry will be deleted in HandleSubConnStateChange.
+		}
+	}
+}
+
+// regeneratePicker takes a snapshot of the balancer, and generates a picker
+// from it. The picker is
+//  - errPicker with ErrTransientFailure if the balancer is in TransientFailure,
+//  - built by the pickerBuilder with all READY SubConns otherwise.
+func (b *baseBalancer) regeneratePicker() {
+	if b.state == connectivity.TransientFailure {
+		b.picker = NewErrPicker(balancer.ErrTransientFailure)
+		return
+	}
+	readySCs := make(map[resolver.Address]balancer.SubConn)
+
+	// Filter out all ready SCs from full subConn map.
+	for addr, sc := range b.subConns {
+		if st, ok := b.scStates[sc]; ok && st == connectivity.Ready {
+			readySCs[addr] = sc
+		}
+	}
+	b.picker = b.pickerBuilder.Build(readySCs)
+}
+
+func (b *baseBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
+	grpclog.Infof("base.baseBalancer: handle SubConn state change: %p, %v", sc, s)
+	oldS, ok := b.scStates[sc]
+	if !ok {
+		grpclog.Infof("base.baseBalancer: got state changes for an unknown SubConn: %p, %v", sc, s)
+		return
+	}
+	b.scStates[sc] = s
+	switch s {
+	case connectivity.Idle:
+		sc.Connect()
+	case connectivity.Shutdown:
+		// When an address was removed by resolver, b called RemoveSubConn but
+		// kept the sc's state in scStates. Remove state for this sc here.
+		delete(b.scStates, sc)
+	}
+
+	oldAggrState := b.state
+	b.state = b.csEvltr.recordTransition(oldS, s)
+
+	// Regenerate picker when one of the following happens:
+	//  - this sc became ready from not-ready
+	//  - this sc became not-ready from ready
+	//  - the aggregated state of balancer became TransientFailure from non-TransientFailure
+	//  - the aggregated state of balancer became non-TransientFailure from TransientFailure
+	if (s == connectivity.Ready) != (oldS == connectivity.Ready) ||
+		(b.state == connectivity.TransientFailure) != (oldAggrState == connectivity.TransientFailure) {
+		b.regeneratePicker()
+	}
+
+	b.cc.UpdateBalancerState(b.state, b.picker)
+	return
+}
+
+// Close is a nop because base balancer doesn't have internal state to clean up,
+// and it doesn't need to call RemoveSubConn for the SubConns.
+func (b *baseBalancer) Close() {
+}
+
+// NewErrPicker returns a picker that always returns err on Pick().
+func NewErrPicker(err error) balancer.Picker {
+	return &errPicker{err: err}
+}
+
+type errPicker struct {
+	err error // Pick() always returns this err.
+}
+
+func (p *errPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
+	return nil, nil, p.err
+}
+
+// connectivityStateEvaluator gets updated by addrConns when their
+// states transition, based on which it evaluates the state of
+// ClientConn.
+type connectivityStateEvaluator struct {
+	numReady            uint64 // Number of addrConns in ready state.
+	numConnecting       uint64 // Number of addrConns in connecting state.
+	numTransientFailure uint64 // Number of addrConns in transientFailure.
+}
+
+// recordTransition records state change happening in every subConn and based on
+// that it evaluates what aggregated state should be.
+// It can only transition between Ready, Connecting and TransientFailure. Other states,
+// Idle and Shutdown are transitioned into by ClientConn; in the beginning of the connection
+// before any subConn is created ClientConn is in idle state. In the end when ClientConn
+// closes it is in Shutdown state.
+//
+// recordTransition should only be called synchronously from the same goroutine.
+func (cse *connectivityStateEvaluator) recordTransition(oldState, newState connectivity.State) connectivity.State {
+	// Update counters.
+	for idx, state := range []connectivity.State{oldState, newState} {
+		updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
+		switch state {
+		case connectivity.Ready:
+			cse.numReady += updateVal
+		case connectivity.Connecting:
+			cse.numConnecting += updateVal
+		case connectivity.TransientFailure:
+			cse.numTransientFailure += updateVal
+		}
+	}
+
+	// Evaluate.
+	if cse.numReady > 0 {
+		return connectivity.Ready
+	}
+	if cse.numConnecting > 0 {
+		return connectivity.Connecting
+	}
+	return connectivity.TransientFailure
+}

vendor/google.golang.org/grpc/balancer/base/base.go

@@ -0,0 +1,52 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package base defines a balancer base that can be used to build balancers with
+// different picking algorithms.
+//
+// The base balancer creates a new SubConn for each resolved address. The
+// provided picker will only be notified about READY SubConns.
+//
+// This package is the base of round_robin balancer, its purpose is to be used
+// to build round_robin like balancers with complex picking algorithms.
+// Balancers with more complicated logic should try to implement a balancer
+// builder from scratch.
+//
+// All APIs in this package are experimental.
+package base
+
+import (
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/resolver"
+)
+
+// PickerBuilder creates balancer.Picker.
+type PickerBuilder interface {
+	// Build takes a slice of ready SubConns, and returns a picker that will be
+	// used by gRPC to pick a SubConn.
+	Build(readySCs map[resolver.Address]balancer.SubConn) balancer.Picker
+}
+
+// NewBalancerBuilder returns a balancer builder. The balancers
+// built by this builder will use the picker builder to build pickers.
+func NewBalancerBuilder(name string, pb PickerBuilder) balancer.Builder {
+	return &baseBuilder{
+		name:          name,
+		pickerBuilder: pb,
+	}
+}

vendor/google.golang.org/grpc/balancer/roundrobin/roundrobin.go

@@ -0,0 +1,79 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package roundrobin defines a roundrobin balancer. Roundrobin balancer is
+// installed as one of the default balancers in gRPC, users don't need to
+// explicitly install this balancer.
+package roundrobin
+
+import (
+	"sync"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/balancer/base"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/resolver"
+)
+
+// Name is the name of round_robin balancer.
+const Name = "round_robin"
+
+// newBuilder creates a new roundrobin balancer builder.
+func newBuilder() balancer.Builder {
+	return base.NewBalancerBuilder(Name, &rrPickerBuilder{})
+}
+
+func init() {
+	balancer.Register(newBuilder())
+}
+
+type rrPickerBuilder struct{}
+
+func (*rrPickerBuilder) Build(readySCs map[resolver.Address]balancer.SubConn) balancer.Picker {
+	grpclog.Infof("roundrobinPicker: newPicker called with readySCs: %v", readySCs)
+	var scs []balancer.SubConn
+	for _, sc := range readySCs {
+		scs = append(scs, sc)
+	}
+	return &rrPicker{
+		subConns: scs,
+	}
+}
+
+type rrPicker struct {
+	// subConns is the snapshot of the roundrobin balancer when this picker was
+	// created. The slice is immutable. Each Get() will do a round robin
+	// selection from it and return the selected SubConn.
+	subConns []balancer.SubConn
+
+	mu   sync.Mutex
+	next int
+}
+
+func (p *rrPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
+	if len(p.subConns) <= 0 {
+		return nil, nil, balancer.ErrNoSubConnAvailable
+	}
+
+	p.mu.Lock()
+	sc := p.subConns[p.next]
+	p.next = (p.next + 1) % len(p.subConns)
+	p.mu.Unlock()
+	return sc, nil, nil
+}

vendor/google.golang.org/grpc/balancer_conn_wrappers.go

@@ -19,6 +19,7 @@
 package grpc
 
 import (
+	"fmt"
 	"sync"
 
 	"google.golang.org/grpc/balancer"
@@ -73,7 +74,7 @@ func (b *scStateUpdateBuffer) load() {
 	}
 }
 
-// get returns the channel that receives a recvMsg in the buffer.
+// get returns the channel that the scStateUpdate will be sent to.
 //
 // Upon receiving, the caller should call load to send another
 // scStateChangeTuple onto the channel if there is any.
@@ -96,6 +97,9 @@ type ccBalancerWrapper struct {
 	stateChangeQueue *scStateUpdateBuffer
 	resolverUpdateCh chan *resolverUpdate
 	done             chan struct{}
+
+	mu       sync.Mutex
+	subConns map[*acBalancerWrapper]struct{}
 }
 
 func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.BuildOptions) *ccBalancerWrapper {
@@ -104,6 +108,7 @@ func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.Bui
 		stateChangeQueue: newSCStateUpdateBuffer(),
 		resolverUpdateCh: make(chan *resolverUpdate, 1),
 		done:             make(chan struct{}),
+		subConns:         make(map[*acBalancerWrapper]struct{}),
 	}
 	go ccb.watcher()
 	ccb.balancer = b.Build(ccb, bopts)
@@ -117,8 +122,20 @@ func (ccb *ccBalancerWrapper) watcher() {
 		select {
 		case t := <-ccb.stateChangeQueue.get():
 			ccb.stateChangeQueue.load()
+			select {
+			case <-ccb.done:
+				ccb.balancer.Close()
+				return
+			default:
+			}
 			ccb.balancer.HandleSubConnStateChange(t.sc, t.state)
 		case t := <-ccb.resolverUpdateCh:
+			select {
+			case <-ccb.done:
+				ccb.balancer.Close()
+				return
+			default:
+			}
 			ccb.balancer.HandleResolvedAddrs(t.addrs, t.err)
 		case <-ccb.done:
 		}
@@ -126,6 +143,13 @@ func (ccb *ccBalancerWrapper) watcher() {
 		select {
 		case <-ccb.done:
 			ccb.balancer.Close()
+			ccb.mu.Lock()
+			scs := ccb.subConns
+			ccb.subConns = nil
+			ccb.mu.Unlock()
+			for acbw := range scs {
+				ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
+			}
 			return
 		default:
 		}
@@ -165,33 +189,54 @@ func (ccb *ccBalancerWrapper) handleResolvedAddrs(addrs []resolver.Address, err
 }
 
 func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) {
-	grpclog.Infof("ccBalancerWrapper: new subconn: %v", addrs)
+	if len(addrs) <= 0 {
+		return nil, fmt.Errorf("grpc: cannot create SubConn with empty address list")
+	}
+	ccb.mu.Lock()
+	defer ccb.mu.Unlock()
+	if ccb.subConns == nil {
+		return nil, fmt.Errorf("grpc: ClientConn balancer wrapper was closed")
+	}
 	ac, err := ccb.cc.newAddrConn(addrs)
 	if err != nil {
 		return nil, err
 	}
 	acbw := &acBalancerWrapper{ac: ac}
-	ac.mu.Lock()
+	acbw.ac.mu.Lock()
 	ac.acbw = acbw
-	ac.mu.Unlock()
+	acbw.ac.mu.Unlock()
+	ccb.subConns[acbw] = struct{}{}
 	return acbw, nil
 }
 
 func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) {
-	grpclog.Infof("ccBalancerWrapper: removing subconn")
 	acbw, ok := sc.(*acBalancerWrapper)
 	if !ok {
 		return
 	}
+	ccb.mu.Lock()
+	defer ccb.mu.Unlock()
+	if ccb.subConns == nil {
+		return
+	}
+	delete(ccb.subConns, acbw)
 	ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
 }
 
 func (ccb *ccBalancerWrapper) UpdateBalancerState(s connectivity.State, p balancer.Picker) {
-	grpclog.Infof("ccBalancerWrapper: updating state and picker called by balancer: %v, %p", s, p)
+	ccb.mu.Lock()
+	defer ccb.mu.Unlock()
+	if ccb.subConns == nil {
+		return
+	}
 	ccb.cc.csMgr.updateState(s)
 	ccb.cc.blockingpicker.updatePicker(p)
 }
 
+func (ccb *ccBalancerWrapper) ResolveNow(o resolver.ResolveNowOption) {
+	ccb.cc.resolveNow(o)
+}
+
 func (ccb *ccBalancerWrapper) Target() string {
 	return ccb.cc.target
 }
@@ -204,9 +249,12 @@ type acBalancerWrapper struct {
 }
 
 func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) {
-	grpclog.Infof("acBalancerWrapper: UpdateAddresses called with %v", addrs)
 	acbw.mu.Lock()
 	defer acbw.mu.Unlock()
+	if len(addrs) <= 0 {
+		acbw.ac.tearDown(errConnDrain)
+		return
+	}
 	if !acbw.ac.tryUpdateAddrs(addrs) {
 		cc := acbw.ac.cc
 		acbw.ac.mu.Lock()
@@ -234,7 +282,7 @@ func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) {
 		ac.acbw = acbw
 		ac.mu.Unlock()
 		if acState != connectivity.Idle {
-			ac.connect(false)
+			ac.connect()
 		}
 	}
 }
@@ -242,7 +290,7 @@ func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) {
 func (acbw *acBalancerWrapper) Connect() {
 	acbw.mu.Lock()
 	defer acbw.mu.Unlock()
-	acbw.ac.connect(false)
+	acbw.ac.connect()
 }
 
 func (acbw *acBalancerWrapper) getAddrConn() *addrConn {

vendor/google.golang.org/grpc/balancer_v1_wrapper.go

@@ -19,6 +19,7 @@
 package grpc
 
 import (
+	"strings"
 	"sync"
 
 	"golang.org/x/net/context"
@@ -27,6 +28,7 @@ import (
 	"google.golang.org/grpc/connectivity"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/resolver"
+	"google.golang.org/grpc/status"
 )
 
 type balancerWrapperBuilder struct {
@@ -34,20 +36,27 @@ type balancerWrapperBuilder struct {
 }
 
 func (bwb *balancerWrapperBuilder) Build(cc balancer.ClientConn, opts balancer.BuildOptions) balancer.Balancer {
-	bwb.b.Start(cc.Target(), BalancerConfig{
+	targetAddr := cc.Target()
+	targetSplitted := strings.Split(targetAddr, ":///")
+	if len(targetSplitted) >= 2 {
+		targetAddr = targetSplitted[1]
+	}
+
+	bwb.b.Start(targetAddr, BalancerConfig{
 		DialCreds: opts.DialCreds,
 		Dialer:    opts.Dialer,
 	})
 	_, pickfirst := bwb.b.(*pickFirst)
 	bw := &balancerWrapper{
-		balancer:  bwb.b,
+		balancer:   bwb.b,
-		pickfirst: pickfirst,
+		pickfirst:  pickfirst,
-		cc:        cc,
+		cc:         cc,
-		startCh:   make(chan struct{}),
+		targetAddr: targetAddr,
-		conns:     make(map[resolver.Address]balancer.SubConn),
+		startCh:    make(chan struct{}),
-		connSt:    make(map[balancer.SubConn]*scState),
+		conns:      make(map[resolver.Address]balancer.SubConn),
-		csEvltr:   &connectivityStateEvaluator{},
+		connSt:     make(map[balancer.SubConn]*scState),
-		state:     connectivity.Idle,
+		csEvltr:    &connectivityStateEvaluator{},
+		state:      connectivity.Idle,
 	}
 	cc.UpdateBalancerState(connectivity.Idle, bw)
 	go bw.lbWatcher()
@@ -68,7 +77,8 @@ type balancerWrapper struct {
 	balancer  Balancer // The v1 balancer.
 	pickfirst bool
 
-	cc balancer.ClientConn
+	cc         balancer.ClientConn
+	targetAddr string // Target without the scheme.
 
 	// To aggregate the connectivity state.
 	csEvltr *connectivityStateEvaluator
@@ -88,12 +98,11 @@ type balancerWrapper struct {
 // connections accordingly.
 func (bw *balancerWrapper) lbWatcher() {
 	<-bw.startCh
-	grpclog.Infof("balancerWrapper: is pickfirst: %v\n", bw.pickfirst)
 	notifyCh := bw.balancer.Notify()
 	if notifyCh == nil {
 		// There's no resolver in the balancer. Connect directly.
 		a := resolver.Address{
-			Addr: bw.cc.Target(),
+			Addr: bw.targetAddr,
 			Type: resolver.Backend,
 		}
 		sc, err := bw.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{})
@@ -103,7 +112,7 @@ func (bw *balancerWrapper) lbWatcher() {
 			bw.mu.Lock()
 			bw.conns[a] = sc
 			bw.connSt[sc] = &scState{
-				addr: Address{Addr: bw.cc.Target()},
+				addr: Address{Addr: bw.targetAddr},
 				s:    connectivity.Idle,
 			}
 			bw.mu.Unlock()
@@ -165,10 +174,10 @@ func (bw *balancerWrapper) lbWatcher() {
 					sc.Connect()
 				}
 			} else {
-				oldSC.UpdateAddresses(newAddrs)
 				bw.mu.Lock()
 				bw.connSt[oldSC].addr = addrs[0]
 				bw.mu.Unlock()
+				oldSC.UpdateAddresses(newAddrs)
 			}
 		} else {
 			var (
@@ -221,7 +230,6 @@ func (bw *balancerWrapper) lbWatcher() {
 }
 
 func (bw *balancerWrapper) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
-	grpclog.Infof("balancerWrapper: handle subconn state change: %p, %v", sc, s)
 	bw.mu.Lock()
 	defer bw.mu.Unlock()
 	scSt, ok := bw.connSt[sc]
@@ -310,12 +318,12 @@ func (bw *balancerWrapper) Pick(ctx context.Context, opts balancer.PickOptions)
 			Metadata:   a.Metadata,
 		}]
 		if !ok && failfast {
-			return nil, nil, Errorf(codes.Unavailable, "there is no connection available")
+			return nil, nil, status.Errorf(codes.Unavailable, "there is no connection available")
 		}
 		if s, ok := bw.connSt[sc]; failfast && (!ok || s.s != connectivity.Ready) {
 			// If the returned sc is not ready and RPC is failfast,
 			// return error, and this RPC will fail.
-			return nil, nil, Errorf(codes.Unavailable, "there is no connection available")
+			return nil, nil, status.Errorf(codes.Unavailable, "there is no connection available")
 		}
 	}
 

vendor/google.golang.org/grpc/call.go

@@ -19,289 +19,56 @@
 package grpc
 
 import (
-	"bytes"
-	"io"
-	"time"
-
 	"golang.org/x/net/context"
-	"golang.org/x/net/trace"
-	"google.golang.org/grpc/balancer"
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/peer"
-	"google.golang.org/grpc/stats"
-	"google.golang.org/grpc/status"
-	"google.golang.org/grpc/transport"
 )
 
-// recvResponse receives and parses an RPC response.
+// Invoke sends the RPC request on the wire and returns after response is
-// On error, it returns the error and indicates whether the call should be retried.
+// received.  This is typically called by generated code.
 //
-// TODO(zhaoq): Check whether the received message sequence is valid.
+// All errors returned by Invoke are compatible with the status package.
-// TODO ctx is used for stats collection and processing. It is the context passed from the application.
+func (cc *ClientConn) Invoke(ctx context.Context, method string, args, reply interface{}, opts ...CallOption) error {
-func recvResponse(ctx context.Context, dopts dialOptions, t transport.ClientTransport, c *callInfo, stream *transport.Stream, reply interface{}) (err error) {
-	// Try to acquire header metadata from the server if there is any.
-	defer func() {
-		if err != nil {
-			if _, ok := err.(transport.ConnectionError); !ok {
-				t.CloseStream(stream, err)
-			}
-		}
-	}()
-	c.headerMD, err = stream.Header()
-	if err != nil {
-		return
-	}
-	p := &parser{r: stream}
-	var inPayload *stats.InPayload
-	if dopts.copts.StatsHandler != nil {
-		inPayload = &stats.InPayload{
-			Client: true,
-		}
-	}
-	for {
-		if c.maxReceiveMessageSize == nil {
-			return Errorf(codes.Internal, "callInfo maxReceiveMessageSize field uninitialized(nil)")
-		}
-		if err = recv(p, dopts.codec, stream, dopts.dc, reply, *c.maxReceiveMessageSize, inPayload); err != nil {
-			if err == io.EOF {
-				break
-			}
-			return
-		}
-	}
-	if inPayload != nil && err == io.EOF && stream.Status().Code() == codes.OK {
-		// TODO in the current implementation, inTrailer may be handled before inPayload in some cases.
-		// Fix the order if necessary.
-		dopts.copts.StatsHandler.HandleRPC(ctx, inPayload)
-	}
-	c.trailerMD = stream.Trailer()
-	return nil
-}
-
-// sendRequest writes out various information of an RPC such as Context and Message.
-func sendRequest(ctx context.Context, dopts dialOptions, compressor Compressor, c *callInfo, callHdr *transport.CallHdr, stream *transport.Stream, t transport.ClientTransport, args interface{}, opts *transport.Options) (err error) {
-	defer func() {
-		if err != nil {
-			// If err is connection error, t will be closed, no need to close stream here.
-			if _, ok := err.(transport.ConnectionError); !ok {
-				t.CloseStream(stream, err)
-			}
-		}
-	}()
-	var (
-		cbuf       *bytes.Buffer
-		outPayload *stats.OutPayload
-	)
-	if compressor != nil {
-		cbuf = new(bytes.Buffer)
-	}
-	if dopts.copts.StatsHandler != nil {
-		outPayload = &stats.OutPayload{
-			Client: true,
-		}
-	}
-	hdr, data, err := encode(dopts.codec, args, compressor, cbuf, outPayload)
-	if err != nil {
-		return err
-	}
-	if c.maxSendMessageSize == nil {
-		return Errorf(codes.Internal, "callInfo maxSendMessageSize field uninitialized(nil)")
-	}
-	if len(data) > *c.maxSendMessageSize {
-		return Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(data), *c.maxSendMessageSize)
-	}
-	err = t.Write(stream, hdr, data, opts)
-	if err == nil && outPayload != nil {
-		outPayload.SentTime = time.Now()
-		dopts.copts.StatsHandler.HandleRPC(ctx, outPayload)
-	}
-	// t.NewStream(...) could lead to an early rejection of the RPC (e.g., the service/method
-	// does not exist.) so that t.Write could get io.EOF from wait(...). Leave the following
-	// recvResponse to get the final status.
-	if err != nil && err != io.EOF {
-		return err
-	}
-	// Sent successfully.
-	return nil
-}
-
-// Invoke sends the RPC request on the wire and returns after response is received.
-// Invoke is called by generated code. Also users can call Invoke directly when it
-// is really needed in their use cases.
-func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error {
 	if cc.dopts.unaryInt != nil {
 		return cc.dopts.unaryInt(ctx, method, args, reply, cc, invoke, opts...)
 	}
 	return invoke(ctx, method, args, reply, cc, opts...)
 }
 
-func invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) (e error) {
+// Invoke sends the RPC request on the wire and returns after response is
-	c := defaultCallInfo()
+// received.  This is typically called by generated code.
-	mc := cc.GetMethodConfig(method)
+//
-	if mc.WaitForReady != nil {
+// DEPRECATED: Use ClientConn.Invoke instead.
-		c.failFast = !*mc.WaitForReady
+func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error {
-	}
+	return cc.Invoke(ctx, method, args, reply, opts...)
+}
 
-	if mc.Timeout != nil && *mc.Timeout >= 0 {
+var unaryStreamDesc = &StreamDesc{ServerStreams: false, ClientStreams: false}
-		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, *mc.Timeout)
-		defer cancel()
-	}
 
-	opts = append(cc.dopts.callOptions, opts...)
+func invoke(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error {
-	for _, o := range opts {
+	// TODO: implement retries in clientStream and make this simply
-		if err := o.before(c); err != nil {
+	// newClientStream, SendMsg, RecvMsg.
-			return toRPCErr(err)
+	firstAttempt := true
-		}
-	}
-	defer func() {
-		for _, o := range opts {
-			o.after(c)
-		}
-	}()
-
-	c.maxSendMessageSize = getMaxSize(mc.MaxReqSize, c.maxSendMessageSize, defaultClientMaxSendMessageSize)
-	c.maxReceiveMessageSize = getMaxSize(mc.MaxRespSize, c.maxReceiveMessageSize, defaultClientMaxReceiveMessageSize)
-
-	if EnableTracing {
-		c.traceInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method)
-		defer c.traceInfo.tr.Finish()
-		c.traceInfo.firstLine.client = true
-		if deadline, ok := ctx.Deadline(); ok {
-			c.traceInfo.firstLine.deadline = deadline.Sub(time.Now())
-		}
-		c.traceInfo.tr.LazyLog(&c.traceInfo.firstLine, false)
-		// TODO(dsymonds): Arrange for c.traceInfo.firstLine.remoteAddr to be set.
-		defer func() {
-			if e != nil {
-				c.traceInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{e}}, true)
-				c.traceInfo.tr.SetError()
-			}
-		}()
-	}
-	ctx = newContextWithRPCInfo(ctx, c.failFast)
-	sh := cc.dopts.copts.StatsHandler
-	if sh != nil {
-		ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: c.failFast})
-		begin := &stats.Begin{
-			Client:    true,
-			BeginTime: time.Now(),
-			FailFast:  c.failFast,
-		}
-		sh.HandleRPC(ctx, begin)
-		defer func() {
-			end := &stats.End{
-				Client:  true,
-				EndTime: time.Now(),
-				Error:   e,
-			}
-			sh.HandleRPC(ctx, end)
-		}()
-	}
-	topts := &transport.Options{
-		Last:  true,
-		Delay: false,
-	}
 	for {
-		var (
+		csInt, err := newClientStream(ctx, unaryStreamDesc, cc, method, opts...)
-			err    error
-			t      transport.ClientTransport
-			stream *transport.Stream
-			// Record the done handler from Balancer.Get(...). It is called once the
-			// RPC has completed or failed.
-			done func(balancer.DoneInfo)
-		)
-		// TODO(zhaoq): Need a formal spec of fail-fast.
-		callHdr := &transport.CallHdr{
-			Host:   cc.authority,
-			Method: method,
-		}
-		if cc.dopts.cp != nil {
-			callHdr.SendCompress = cc.dopts.cp.Type()
-		}
-		if c.creds != nil {
-			callHdr.Creds = c.creds
-		}
-
-		t, done, err = cc.getTransport(ctx, c.failFast)
 		if err != nil {
-			// TODO(zhaoq): Probably revisit the error handling.
+			return err
-			if _, ok := status.FromError(err); ok {
+		}
-				return err
+		cs := csInt.(*clientStream)
-			}
+		if err := cs.SendMsg(req); err != nil {
-			if err == errConnClosing || err == errConnUnavailable {
+			if !cs.c.failFast && cs.s.Unprocessed() && firstAttempt {
-				if c.failFast {
+				// TODO: Add a field to header for grpc-transparent-retry-attempts
-					return Errorf(codes.Unavailable, "%v", err)
+				firstAttempt = false
-				}
 				continue
 			}
-			// All the other errors are treated as Internal errors.
+			return err
-			return Errorf(codes.Internal, "%v", err)
 		}
-		if c.traceInfo.tr != nil {
+		if err := cs.RecvMsg(reply); err != nil {
-			c.traceInfo.tr.LazyLog(&payload{sent: true, msg: args}, true)
+			if !cs.c.failFast && cs.s.Unprocessed() && firstAttempt {
-		}
+				// TODO: Add a field to header for grpc-transparent-retry-attempts
-		stream, err = t.NewStream(ctx, callHdr)
+				firstAttempt = false
-		if err != nil {
-			if done != nil {
-				if _, ok := err.(transport.ConnectionError); ok {
-					// If error is connection error, transport was sending data on wire,
-					// and we are not sure if anything has been sent on wire.
-					// If error is not connection error, we are sure nothing has been sent.
-					updateRPCInfoInContext(ctx, rpcInfo{bytesSent: true, bytesReceived: false})
-				}
-				done(balancer.DoneInfo{Err: err})
-			}
-			if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
 				continue
 			}
-			return toRPCErr(err)
+			return err
 		}
-		if peer, ok := peer.FromContext(stream.Context()); ok {
+		return nil
-			c.peer = peer
-		}
-		err = sendRequest(ctx, cc.dopts, cc.dopts.cp, c, callHdr, stream, t, args, topts)
-		if err != nil {
-			if done != nil {
-				updateRPCInfoInContext(ctx, rpcInfo{
-					bytesSent:     stream.BytesSent(),
-					bytesReceived: stream.BytesReceived(),
-				})
-				done(balancer.DoneInfo{Err: err})
-			}
-			// Retry a non-failfast RPC when
-			// i) there is a connection error; or
-			// ii) the server started to drain before this RPC was initiated.
-			if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
-				continue
-			}
-			return toRPCErr(err)
-		}
-		err = recvResponse(ctx, cc.dopts, t, c, stream, reply)
-		if err != nil {
-			if done != nil {
-				updateRPCInfoInContext(ctx, rpcInfo{
-					bytesSent:     stream.BytesSent(),
-					bytesReceived: stream.BytesReceived(),
-				})
-				done(balancer.DoneInfo{Err: err})
-			}
-			if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
-				continue
-			}
-			return toRPCErr(err)
-		}
-		if c.traceInfo.tr != nil {
-			c.traceInfo.tr.LazyLog(&payload{sent: false, msg: reply}, true)
-		}
-		t.CloseStream(stream, nil)
-		if done != nil {
-			updateRPCInfoInContext(ctx, rpcInfo{
-				bytesSent:     stream.BytesSent(),
-				bytesReceived: stream.BytesReceived(),
-			})
-			done(balancer.DoneInfo{Err: err})
-		}
-		return stream.Status().Err()
 	}
 }

vendor/google.golang.org/grpc/codec.go

@@ -19,86 +19,32 @@
 package grpc
 
 import (
-	"math"
+	"google.golang.org/grpc/encoding"
-	"sync"
+	_ "google.golang.org/grpc/encoding/proto" // to register the Codec for "proto"
-
-	"github.com/golang/protobuf/proto"
 )
 
+// baseCodec contains the functionality of both Codec and encoding.Codec, but
+// omits the name/string, which vary between the two and are not needed for
+// anything besides the registry in the encoding package.
+type baseCodec interface {
+	Marshal(v interface{}) ([]byte, error)
+	Unmarshal(data []byte, v interface{}) error
+}
+
+var _ baseCodec = Codec(nil)
+var _ baseCodec = encoding.Codec(nil)
+
 // Codec defines the interface gRPC uses to encode and decode messages.
 // Note that implementations of this interface must be thread safe;
 // a Codec's methods can be called from concurrent goroutines.
+//
+// Deprecated: use encoding.Codec instead.
 type Codec interface {
 	// Marshal returns the wire format of v.
 	Marshal(v interface{}) ([]byte, error)
 	// Unmarshal parses the wire format into v.
 	Unmarshal(data []byte, v interface{}) error
-	// String returns the name of the Codec implementation. The returned
+	// String returns the name of the Codec implementation.  This is unused by
-	// string will be used as part of content type in transmission.
+	// gRPC.
 	String() string
 }
-
-// protoCodec is a Codec implementation with protobuf. It is the default codec for gRPC.
-type protoCodec struct {
-}
-
-type cachedProtoBuffer struct {
-	lastMarshaledSize uint32
-	proto.Buffer
-}
-
-func capToMaxInt32(val int) uint32 {
-	if val > math.MaxInt32 {
-		return uint32(math.MaxInt32)
-	}
-	return uint32(val)
-}
-
-func (p protoCodec) marshal(v interface{}, cb *cachedProtoBuffer) ([]byte, error) {
-	protoMsg := v.(proto.Message)
-	newSlice := make([]byte, 0, cb.lastMarshaledSize)
-
-	cb.SetBuf(newSlice)
-	cb.Reset()
-	if err := cb.Marshal(protoMsg); err != nil {
-		return nil, err
-	}
-	out := cb.Bytes()
-	cb.lastMarshaledSize = capToMaxInt32(len(out))
-	return out, nil
-}
-
-func (p protoCodec) Marshal(v interface{}) ([]byte, error) {
-	cb := protoBufferPool.Get().(*cachedProtoBuffer)
-	out, err := p.marshal(v, cb)
-
-	// put back buffer and lose the ref to the slice
-	cb.SetBuf(nil)
-	protoBufferPool.Put(cb)
-	return out, err
-}
-
-func (p protoCodec) Unmarshal(data []byte, v interface{}) error {
-	cb := protoBufferPool.Get().(*cachedProtoBuffer)
-	cb.SetBuf(data)
-	v.(proto.Message).Reset()
-	err := cb.Unmarshal(v.(proto.Message))
-	cb.SetBuf(nil)
-	protoBufferPool.Put(cb)
-	return err
-}
-
-func (protoCodec) String() string {
-	return "proto"
-}
-
-var (
-	protoBufferPool = &sync.Pool{
-		New: func() interface{} {
-			return &cachedProtoBuffer{
-				Buffer:            proto.Buffer{},
-				lastMarshaledSize: 16,
-			}
-		},
-	}
-)

vendor/google.golang.org/grpc/codes/code_string.go

@@ -1,16 +1,62 @@
-// Code generated by "stringer -type=Code"; DO NOT EDIT.
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
 
 package codes
 
-import "fmt"
+import "strconv"
 
-const _Code_name = "OKCanceledUnknownInvalidArgumentDeadlineExceededNotFoundAlreadyExistsPermissionDeniedResourceExhaustedFailedPreconditionAbortedOutOfRangeUnimplementedInternalUnavailableDataLossUnauthenticated"
+func (c Code) String() string {
-
+	switch c {
-var _Code_index = [...]uint8{0, 2, 10, 17, 32, 48, 56, 69, 85, 102, 120, 127, 137, 150, 158, 169, 177, 192}
+	case OK:
-
+		return "OK"
-func (i Code) String() string {
+	case Canceled:
-	if i >= Code(len(_Code_index)-1) {
+		return "Canceled"
-		return fmt.Sprintf("Code(%d)", i)
+	case Unknown:
+		return "Unknown"
+	case InvalidArgument:
+		return "InvalidArgument"
+	case DeadlineExceeded:
+		return "DeadlineExceeded"
+	case NotFound:
+		return "NotFound"
+	case AlreadyExists:
+		return "AlreadyExists"
+	case PermissionDenied:
+		return "PermissionDenied"
+	case ResourceExhausted:
+		return "ResourceExhausted"
+	case FailedPrecondition:
+		return "FailedPrecondition"
+	case Aborted:
+		return "Aborted"
+	case OutOfRange:
+		return "OutOfRange"
+	case Unimplemented:
+		return "Unimplemented"
+	case Internal:
+		return "Internal"
+	case Unavailable:
+		return "Unavailable"
+	case DataLoss:
+		return "DataLoss"
+	case Unauthenticated:
+		return "Unauthenticated"
+	default:
+		return "Code(" + strconv.FormatInt(int64(c), 10) + ")"
 	}
-	return _Code_name[_Code_index[i]:_Code_index[i+1]]
 }

vendor/google.golang.org/grpc/codes/codes.go

@@ -20,11 +20,13 @@
 // consistent across various languages.
 package codes // import "google.golang.org/grpc/codes"
 
+import (
+	"fmt"
+)
+
 // A Code is an unsigned 32-bit error code as defined in the gRPC spec.
 type Code uint32
 
-//go:generate stringer -type=Code
-
 const (
 	// OK is returned on success.
 	OK Code = 0
@@ -32,9 +34,9 @@ const (
 	// Canceled indicates the operation was canceled (typically by the caller).
 	Canceled Code = 1
 
-	// Unknown error.  An example of where this error may be returned is
+	// Unknown error. An example of where this error may be returned is
 	// if a Status value received from another address space belongs to
-	// an error-space that is not known in this address space.  Also
+	// an error-space that is not known in this address space. Also
 	// errors raised by APIs that do not return enough error information
 	// may be converted to this error.
 	Unknown Code = 2
@@ -63,15 +65,11 @@ const (
 	// PermissionDenied indicates the caller does not have permission to
 	// execute the specified operation. It must not be used for rejections
 	// caused by exhausting some resource (use ResourceExhausted
-	// instead for those errors).  It must not be
+	// instead for those errors). It must not be
 	// used if the caller cannot be identified (use Unauthenticated
 	// instead for those errors).
 	PermissionDenied Code = 7
 
-	// Unauthenticated indicates the request does not have valid
-	// authentication credentials for the operation.
-	Unauthenticated Code = 16
-
 	// ResourceExhausted indicates some resource has been exhausted, perhaps
 	// a per-user quota, or perhaps the entire file system is out of space.
 	ResourceExhausted Code = 8
@@ -87,7 +85,7 @@ const (
 	//  (b) Use Aborted if the client should retry at a higher-level
 	//      (e.g., restarting a read-modify-write sequence).
 	//  (c) Use FailedPrecondition if the client should not retry until
-	//      the system state has been explicitly fixed.  E.g., if an "rmdir"
+	//      the system state has been explicitly fixed. E.g., if an "rmdir"
 	//      fails because the directory is non-empty, FailedPrecondition
 	//      should be returned since the client should not retry unless
 	//      they have first fixed up the directory by deleting files from it.
@@ -116,7 +114,7 @@ const (
 	// file size.
 	//
 	// There is a fair bit of overlap between FailedPrecondition and
-	// OutOfRange.  We recommend using OutOfRange (the more specific
+	// OutOfRange. We recommend using OutOfRange (the more specific
 	// error) when it applies so that callers who are iterating through
 	// a space can easily look for an OutOfRange error to detect when
 	// they are done.
@@ -126,8 +124,8 @@ const (
 	// supported/enabled in this service.
 	Unimplemented Code = 12
 
-	// Internal errors.  Means some invariants expected by underlying
+	// Internal errors. Means some invariants expected by underlying
-	// system has been broken.  If you see one of these errors,
+	// system has been broken. If you see one of these errors,
 	// something is very broken.
 	Internal Code = 13
 
@@ -141,4 +139,46 @@ const (
 
 	// DataLoss indicates unrecoverable data loss or corruption.
 	DataLoss Code = 15
+
+	// Unauthenticated indicates the request does not have valid
+	// authentication credentials for the operation.
+	Unauthenticated Code = 16
 )
+
+var strToCode = map[string]Code{
+	`"OK"`: OK,
+	`"CANCELLED"`:/* [sic] */ Canceled,
+	`"UNKNOWN"`:             Unknown,
+	`"INVALID_ARGUMENT"`:    InvalidArgument,
+	`"DEADLINE_EXCEEDED"`:   DeadlineExceeded,
+	`"NOT_FOUND"`:           NotFound,
+	`"ALREADY_EXISTS"`:      AlreadyExists,
+	`"PERMISSION_DENIED"`:   PermissionDenied,
+	`"RESOURCE_EXHAUSTED"`:  ResourceExhausted,
+	`"FAILED_PRECONDITION"`: FailedPrecondition,
+	`"ABORTED"`:             Aborted,
+	`"OUT_OF_RANGE"`:        OutOfRange,
+	`"UNIMPLEMENTED"`:       Unimplemented,
+	`"INTERNAL"`:            Internal,
+	`"UNAVAILABLE"`:         Unavailable,
+	`"DATA_LOSS"`:           DataLoss,
+	`"UNAUTHENTICATED"`:     Unauthenticated,
+}
+
+// UnmarshalJSON unmarshals b into the Code.
+func (c *Code) UnmarshalJSON(b []byte) error {
+	// From json.Unmarshaler: By convention, to approximate the behavior of
+	// Unmarshal itself, Unmarshalers implement UnmarshalJSON([]byte("null")) as
+	// a no-op.
+	if string(b) == "null" {
+		return nil
+	}
+	if c == nil {
+		return fmt.Errorf("nil receiver passed to UnmarshalJSON")
+	}
+	if jc, ok := strToCode[string(b)]; ok {
+		*c = jc
+		return nil
+	}
+	return fmt.Errorf("invalid code: %q", string(b))
+}

vendor/google.golang.org/grpc/credentials/credentials.go

@@ -34,10 +34,8 @@ import (
 	"golang.org/x/net/context"
 )
 
-var (
+// alpnProtoStr are the specified application level protocols for gRPC.
-	// alpnProtoStr are the specified application level protocols for gRPC.
+var alpnProtoStr = []string{"h2"}
-	alpnProtoStr = []string{"h2"}
-)
 
 // PerRPCCredentials defines the common interface for the credentials which need to
 // attach security information to every RPC (e.g., oauth2).
@@ -45,8 +43,9 @@ type PerRPCCredentials interface {
 	// GetRequestMetadata gets the current request metadata, refreshing
 	// tokens if required. This should be called by the transport layer on
 	// each request, and the data should be populated in headers or other
-	// context. uri is the URI of the entry point for the request. When
+	// context. If a status code is returned, it will be used as the status
-	// supported by the underlying implementation, ctx can be used for
+	// for the RPC. uri is the URI of the entry point for the request.
+	// When supported by the underlying implementation, ctx can be used for
 	// timeout and cancellation.
 	// TODO(zhaoq): Define the set of the qualified keys instead of leaving
 	// it as an arbitrary string.
@@ -74,11 +73,9 @@ type AuthInfo interface {
 	AuthType() string
 }
 
-var (
+// ErrConnDispatched indicates that rawConn has been dispatched out of gRPC
-	// ErrConnDispatched indicates that rawConn has been dispatched out of gRPC
+// and the caller should not close rawConn.
-	// and the caller should not close rawConn.
+var ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC")
-	ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC")
-)
 
 // TransportCredentials defines the common interface for all the live gRPC wire
 // protocols and supported transport security protocols (e.g., TLS, SSL).
@@ -135,15 +132,15 @@ func (c tlsCreds) Info() ProtocolInfo {
 	}
 }
 
-func (c *tlsCreds) ClientHandshake(ctx context.Context, addr string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) {
+func (c *tlsCreds) ClientHandshake(ctx context.Context, authority string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) {
 	// use local cfg to avoid clobbering ServerName if using multiple endpoints
 	cfg := cloneTLSConfig(c.config)
 	if cfg.ServerName == "" {
-		colonPos := strings.LastIndex(addr, ":")
+		colonPos := strings.LastIndex(authority, ":")
 		if colonPos == -1 {
-			colonPos = len(addr)
+			colonPos = len(authority)
 		}
-		cfg.ServerName = addr[:colonPos]
+		cfg.ServerName = authority[:colonPos]
 	}
 	conn := tls.Client(rawConn, cfg)
 	errChannel := make(chan error, 1)

vendor/google.golang.org/grpc/encoding/encoding.go

@@ -0,0 +1,118 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package encoding defines the interface for the compressor and codec, and
+// functions to register and retrieve compressors and codecs.
+//
+// This package is EXPERIMENTAL.
+package encoding
+
+import (
+	"io"
+	"strings"
+)
+
+// Identity specifies the optional encoding for uncompressed streams.
+// It is intended for grpc internal use only.
+const Identity = "identity"
+
+// Compressor is used for compressing and decompressing when sending or
+// receiving messages.
+type Compressor interface {
+	// Compress writes the data written to wc to w after compressing it.  If an
+	// error occurs while initializing the compressor, that error is returned
+	// instead.
+	Compress(w io.Writer) (io.WriteCloser, error)
+	// Decompress reads data from r, decompresses it, and provides the
+	// uncompressed data via the returned io.Reader.  If an error occurs while
+	// initializing the decompressor, that error is returned instead.
+	Decompress(r io.Reader) (io.Reader, error)
+	// Name is the name of the compression codec and is used to set the content
+	// coding header.  The result must be static; the result cannot change
+	// between calls.
+	Name() string
+}
+
+var registeredCompressor = make(map[string]Compressor)
+
+// RegisterCompressor registers the compressor with gRPC by its name.  It can
+// be activated when sending an RPC via grpc.UseCompressor().  It will be
+// automatically accessed when receiving a message based on the content coding
+// header.  Servers also use it to send a response with the same encoding as
+// the request.
+//
+// NOTE: this function must only be called during initialization time (i.e. in
+// an init() function), and is not thread-safe.  If multiple Compressors are
+// registered with the same name, the one registered last will take effect.
+func RegisterCompressor(c Compressor) {
+	registeredCompressor[c.Name()] = c
+}
+
+// GetCompressor returns Compressor for the given compressor name.
+func GetCompressor(name string) Compressor {
+	return registeredCompressor[name]
+}
+
+// Codec defines the interface gRPC uses to encode and decode messages.  Note
+// that implementations of this interface must be thread safe; a Codec's
+// methods can be called from concurrent goroutines.
+type Codec interface {
+	// Marshal returns the wire format of v.
+	Marshal(v interface{}) ([]byte, error)
+	// Unmarshal parses the wire format into v.
+	Unmarshal(data []byte, v interface{}) error
+	// Name returns the name of the Codec implementation. The returned string
+	// will be used as part of content type in transmission.  The result must be
+	// static; the result cannot change between calls.
+	Name() string
+}
+
+var registeredCodecs = make(map[string]Codec, 0)
+
+// RegisterCodec registers the provided Codec for use with all gRPC clients and
+// servers.
+//
+// The Codec will be stored and looked up by result of its Name() method, which
+// should match the content-subtype of the encoding handled by the Codec.  This
+// is case-insensitive, and is stored and looked up as lowercase.  If the
+// result of calling Name() is an empty string, RegisterCodec will panic. See
+// Content-Type on
+// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
+// more details.
+//
+// NOTE: this function must only be called during initialization time (i.e. in
+// an init() function), and is not thread-safe.  If multiple Compressors are
+// registered with the same name, the one registered last will take effect.
+func RegisterCodec(codec Codec) {
+	if codec == nil {
+		panic("cannot register a nil Codec")
+	}
+	contentSubtype := strings.ToLower(codec.Name())
+	if contentSubtype == "" {
+		panic("cannot register Codec with empty string result for String()")
+	}
+	registeredCodecs[contentSubtype] = codec
+}
+
+// GetCodec gets a registered Codec by content-subtype, or nil if no Codec is
+// registered for the content-subtype.
+//
+// The content-subtype is expected to be lowercase.
+func GetCodec(contentSubtype string) Codec {
+	return registeredCodecs[contentSubtype]
+}

vendor/google.golang.org/grpc/encoding/proto/proto.go

@@ -0,0 +1,110 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package proto defines the protobuf codec. Importing this package will
+// register the codec.
+package proto
+
+import (
+	"math"
+	"sync"
+
+	"github.com/golang/protobuf/proto"
+	"google.golang.org/grpc/encoding"
+)
+
+// Name is the name registered for the proto compressor.
+const Name = "proto"
+
+func init() {
+	encoding.RegisterCodec(codec{})
+}
+
+// codec is a Codec implementation with protobuf. It is the default codec for gRPC.
+type codec struct{}
+
+type cachedProtoBuffer struct {
+	lastMarshaledSize uint32
+	proto.Buffer
+}
+
+func capToMaxInt32(val int) uint32 {
+	if val > math.MaxInt32 {
+		return uint32(math.MaxInt32)
+	}
+	return uint32(val)
+}
+
+func marshal(v interface{}, cb *cachedProtoBuffer) ([]byte, error) {
+	protoMsg := v.(proto.Message)
+	newSlice := make([]byte, 0, cb.lastMarshaledSize)
+
+	cb.SetBuf(newSlice)
+	cb.Reset()
+	if err := cb.Marshal(protoMsg); err != nil {
+		return nil, err
+	}
+	out := cb.Bytes()
+	cb.lastMarshaledSize = capToMaxInt32(len(out))
+	return out, nil
+}
+
+func (codec) Marshal(v interface{}) ([]byte, error) {
+	if pm, ok := v.(proto.Marshaler); ok {
+		// object can marshal itself, no need for buffer
+		return pm.Marshal()
+	}
+
+	cb := protoBufferPool.Get().(*cachedProtoBuffer)
+	out, err := marshal(v, cb)
+
+	// put back buffer and lose the ref to the slice
+	cb.SetBuf(nil)
+	protoBufferPool.Put(cb)
+	return out, err
+}
+
+func (codec) Unmarshal(data []byte, v interface{}) error {
+	protoMsg := v.(proto.Message)
+	protoMsg.Reset()
+
+	if pu, ok := protoMsg.(proto.Unmarshaler); ok {
+		// object can unmarshal itself, no need for buffer
+		return pu.Unmarshal(data)
+	}
+
+	cb := protoBufferPool.Get().(*cachedProtoBuffer)
+	cb.SetBuf(data)
+	err := cb.Unmarshal(protoMsg)
+	cb.SetBuf(nil)
+	protoBufferPool.Put(cb)
+	return err
+}
+
+func (codec) Name() string {
+	return Name
+}
+
+var protoBufferPool = &sync.Pool{
+	New: func() interface{} {
+		return &cachedProtoBuffer{
+			Buffer:            proto.Buffer{},
+			lastMarshaledSize: 16,
+		}
+	},
+}

vendor/google.golang.org/grpc/go16.go

@@ -0,0 +1,99 @@
+// +build go1.6,!go1.7
+
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"os"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"google.golang.org/grpc/transport"
+)
+
+// dialContext connects to the address on the named network.
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
+}
+
+func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
+	req.Cancel = ctx.Done()
+	if err := req.Write(conn); err != nil {
+		return fmt.Errorf("failed to write the HTTP request: %v", err)
+	}
+	return nil
+}
+
+// toRPCErr converts an error into an error from the status package.
+func toRPCErr(err error) error {
+	if err == nil || err == io.EOF {
+		return err
+	}
+	if _, ok := status.FromError(err); ok {
+		return err
+	}
+	switch e := err.(type) {
+	case transport.StreamError:
+		return status.Error(e.Code, e.Desc)
+	case transport.ConnectionError:
+		return status.Error(codes.Unavailable, e.Desc)
+	default:
+		switch err {
+		case context.DeadlineExceeded:
+			return status.Error(codes.DeadlineExceeded, err.Error())
+		case context.Canceled:
+			return status.Error(codes.Canceled, err.Error())
+		}
+	}
+	return status.Error(codes.Unknown, err.Error())
+}
+
+// convertCode converts a standard Go error into its canonical code. Note that
+// this is only used to translate the error returned by the server applications.
+func convertCode(err error) codes.Code {
+	switch err {
+	case nil:
+		return codes.OK
+	case io.EOF:
+		return codes.OutOfRange
+	case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
+		return codes.FailedPrecondition
+	case os.ErrInvalid:
+		return codes.InvalidArgument
+	case context.Canceled:
+		return codes.Canceled
+	case context.DeadlineExceeded:
+		return codes.DeadlineExceeded
+	}
+	switch {
+	case os.IsExist(err):
+		return codes.AlreadyExists
+	case os.IsNotExist(err):
+		return codes.NotFound
+	case os.IsPermission(err):
+		return codes.PermissionDenied
+	}
+	return codes.Unknown
+}

vendor/google.golang.org/grpc/go17.go

@@ -0,0 +1,100 @@
+// +build go1.7
+
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"os"
+
+	netctx "golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"google.golang.org/grpc/transport"
+)
+
+// dialContext connects to the address on the named network.
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	return (&net.Dialer{}).DialContext(ctx, network, address)
+}
+
+func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
+	req = req.WithContext(ctx)
+	if err := req.Write(conn); err != nil {
+		return fmt.Errorf("failed to write the HTTP request: %v", err)
+	}
+	return nil
+}
+
+// toRPCErr converts an error into an error from the status package.
+func toRPCErr(err error) error {
+	if err == nil || err == io.EOF {
+		return err
+	}
+	if _, ok := status.FromError(err); ok {
+		return err
+	}
+	switch e := err.(type) {
+	case transport.StreamError:
+		return status.Error(e.Code, e.Desc)
+	case transport.ConnectionError:
+		return status.Error(codes.Unavailable, e.Desc)
+	default:
+		switch err {
+		case context.DeadlineExceeded, netctx.DeadlineExceeded:
+			return status.Error(codes.DeadlineExceeded, err.Error())
+		case context.Canceled, netctx.Canceled:
+			return status.Error(codes.Canceled, err.Error())
+		}
+	}
+	return status.Error(codes.Unknown, err.Error())
+}
+
+// convertCode converts a standard Go error into its canonical code. Note that
+// this is only used to translate the error returned by the server applications.
+func convertCode(err error) codes.Code {
+	switch err {
+	case nil:
+		return codes.OK
+	case io.EOF:
+		return codes.OutOfRange
+	case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
+		return codes.FailedPrecondition
+	case os.ErrInvalid:
+		return codes.InvalidArgument
+	case context.Canceled, netctx.Canceled:
+		return codes.Canceled
+	case context.DeadlineExceeded, netctx.DeadlineExceeded:
+		return codes.DeadlineExceeded
+	}
+	switch {
+	case os.IsExist(err):
+		return codes.AlreadyExists
+	case os.IsNotExist(err):
+		return codes.NotFound
+	case os.IsPermission(err):
+		return codes.PermissionDenied
+	}
+	return codes.Unknown
+}

vendor/google.golang.org/grpc/grpclb.go

@@ -19,21 +19,32 @@
 package grpc
 
 import (
-	"errors"
+	"strconv"
-	"fmt"
+	"strings"
-	"math/rand"
-	"net"
 	"sync"
 	"time"
 
 	"golang.org/x/net/context"
-	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/balancer"
-	lbmpb "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
+	"google.golang.org/grpc/connectivity"
+	lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
 	"google.golang.org/grpc/grpclog"
-	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/resolver"
-	"google.golang.org/grpc/naming"
 )
 
+const (
+	lbTokeyKey             = "lb-token"
+	defaultFallbackTimeout = 10 * time.Second
+	grpclbName             = "grpclb"
+)
+
+func convertDuration(d *lbpb.Duration) time.Duration {
+	if d == nil {
+		return 0
+	}
+	return time.Duration(d.Seconds)*time.Second + time.Duration(d.Nanos)*time.Nanosecond
+}
+
 // Client API for LoadBalancer service.
 // Mostly copied from generated pb.go file.
 // To avoid circular dependency.
@@ -59,646 +70,273 @@ type balanceLoadClientStream struct {
 	ClientStream
 }
 
-func (x *balanceLoadClientStream) Send(m *lbmpb.LoadBalanceRequest) error {
+func (x *balanceLoadClientStream) Send(m *lbpb.LoadBalanceRequest) error {
 	return x.ClientStream.SendMsg(m)
 }
 
-func (x *balanceLoadClientStream) Recv() (*lbmpb.LoadBalanceResponse, error) {
+func (x *balanceLoadClientStream) Recv() (*lbpb.LoadBalanceResponse, error) {
-	m := new(lbmpb.LoadBalanceResponse)
+	m := new(lbpb.LoadBalanceResponse)
 	if err := x.ClientStream.RecvMsg(m); err != nil {
 		return nil, err
 	}
 	return m, nil
 }
 
-// NewGRPCLBBalancer creates a grpclb load balancer.
+func init() {
-func NewGRPCLBBalancer(r naming.Resolver) Balancer {
+	balancer.Register(newLBBuilder())
-	return &grpclbBalancer{
+}
-		r: r,
+
+// newLBBuilder creates a builder for grpclb.
+func newLBBuilder() balancer.Builder {
+	return NewLBBuilderWithFallbackTimeout(defaultFallbackTimeout)
+}
+
+// NewLBBuilderWithFallbackTimeout creates a grpclb builder with the given
+// fallbackTimeout. If no response is received from the remote balancer within
+// fallbackTimeout, the backend addresses from the resolved address list will be
+// used.
+//
+// Only call this function when a non-default fallback timeout is needed.
+func NewLBBuilderWithFallbackTimeout(fallbackTimeout time.Duration) balancer.Builder {
+	return &lbBuilder{
+		fallbackTimeout: fallbackTimeout,
 	}
 }
 
-type remoteBalancerInfo struct {
+type lbBuilder struct {
-	addr string
+	fallbackTimeout time.Duration
-	// the server name used for authentication with the remote LB server.
-	name string
 }
 
-// grpclbAddrInfo consists of the information of a backend server.
+func (b *lbBuilder) Name() string {
-type grpclbAddrInfo struct {
+	return grpclbName
-	addr      Address
-	connected bool
-	// dropForRateLimiting indicates whether this particular request should be
-	// dropped by the client for rate limiting.
-	dropForRateLimiting bool
-	// dropForLoadBalancing indicates whether this particular request should be
-	// dropped by the client for load balancing.
-	dropForLoadBalancing bool
 }
 
-type grpclbBalancer struct {
+func (b *lbBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
-	r      naming.Resolver
+	// This generates a manual resolver builder with a random scheme. This
-	target string
+	// scheme will be used to dial to remote LB, so we can send filtered address
-	mu     sync.Mutex
+	// updates to remote LB ClientConn using this manual resolver.
-	seq    int // a sequence number to make sure addrCh does not get stale addresses.
+	scheme := "grpclb_internal_" + strconv.FormatInt(time.Now().UnixNano(), 36)
-	w      naming.Watcher
+	r := &lbManualResolver{scheme: scheme, ccb: cc}
-	addrCh chan []Address
-	rbs    []remoteBalancerInfo
-	addrs  []*grpclbAddrInfo
-	next   int
-	waitCh chan struct{}
-	done   bool
-	rand   *rand.Rand
 
-	clientStats lbmpb.ClientStats
+	var target string
+	targetSplitted := strings.Split(cc.Target(), ":///")
+	if len(targetSplitted) < 2 {
+		target = cc.Target()
+	} else {
+		target = targetSplitted[1]
+	}
+
+	lb := &lbBalancer{
+		cc:              cc,
+		target:          target,
+		opt:             opt,
+		fallbackTimeout: b.fallbackTimeout,
+		doneCh:          make(chan struct{}),
+
+		manualResolver: r,
+		csEvltr:        &connectivityStateEvaluator{},
+		subConns:       make(map[resolver.Address]balancer.SubConn),
+		scStates:       make(map[balancer.SubConn]connectivity.State),
+		picker:         &errPicker{err: balancer.ErrNoSubConnAvailable},
+		clientStats:    &rpcStats{},
+	}
+
+	return lb
 }
 
-func (b *grpclbBalancer) watchAddrUpdates(w naming.Watcher, ch chan []remoteBalancerInfo) error {
+type lbBalancer struct {
-	updates, err := w.Next()
+	cc              balancer.ClientConn
-	if err != nil {
+	target          string
-		grpclog.Warningf("grpclb: failed to get next addr update from watcher: %v", err)
+	opt             balancer.BuildOptions
-		return err
+	fallbackTimeout time.Duration
-	}
+	doneCh          chan struct{}
-	b.mu.Lock()
+
-	defer b.mu.Unlock()
+	// manualResolver is used in the remote LB ClientConn inside grpclb. When
-	if b.done {
+	// resolved address updates are received by grpclb, filtered updates will be
-		return ErrClientConnClosing
+	// send to remote LB ClientConn through this resolver.
-	}
+	manualResolver *lbManualResolver
-	for _, update := range updates {
+	// The ClientConn to talk to the remote balancer.
-		switch update.Op {
+	ccRemoteLB *ClientConn
-		case naming.Add:
+
-			var exist bool
+	// Support client side load reporting. Each picker gets a reference to this,
-			for _, v := range b.rbs {
+	// and will update its content.
-				// TODO: Is the same addr with different server name a different balancer?
+	clientStats *rpcStats
-				if update.Addr == v.addr {
+
-					exist = true
+	mu sync.Mutex // guards everything following.
-					break
+	// The full server list including drops, used to check if the newly received
-				}
+	// serverList contains anything new. Each generate picker will also have
-			}
+	// reference to this list to do the first layer pick.
-			if exist {
+	fullServerList []*lbpb.Server
-				continue
+	// All backends addresses, with metadata set to nil. This list contains all
-			}
+	// backend addresses in the same order and with the same duplicates as in
-			md, ok := update.Metadata.(*naming.AddrMetadataGRPCLB)
+	// serverlist. When generating picker, a SubConn slice with the same order
-			if !ok {
+	// but with only READY SCs will be gerenated.
-				// TODO: Revisit the handling here and may introduce some fallback mechanism.
+	backendAddrs []resolver.Address
-				grpclog.Errorf("The name resolution contains unexpected metadata %v", update.Metadata)
+	// Roundrobin functionalities.
-				continue
+	csEvltr  *connectivityStateEvaluator
-			}
+	state    connectivity.State
-			switch md.AddrType {
+	subConns map[resolver.Address]balancer.SubConn   // Used to new/remove SubConn.
-			case naming.Backend:
+	scStates map[balancer.SubConn]connectivity.State // Used to filter READY SubConns.
-				// TODO: Revisit the handling here and may introduce some fallback mechanism.
+	picker   balancer.Picker
-				grpclog.Errorf("The name resolution does not give grpclb addresses")
+	// Support fallback to resolved backend addresses if there's no response
-				continue
+	// from remote balancer within fallbackTimeout.
-			case naming.GRPCLB:
+	fallbackTimerExpired bool
-				b.rbs = append(b.rbs, remoteBalancerInfo{
+	serverListReceived   bool
-					addr: update.Addr,
+	// resolvedBackendAddrs is resolvedAddrs minus remote balancers. It's set
-					name: md.ServerName,
+	// when resolved address updates are received, and read in the goroutine
-				})
+	// handling fallback.
-			default:
+	resolvedBackendAddrs []resolver.Address
-				grpclog.Errorf("Received unknow address type %d", md.AddrType)
-				continue
-			}
-		case naming.Delete:
-			for i, v := range b.rbs {
-				if update.Addr == v.addr {
-					copy(b.rbs[i:], b.rbs[i+1:])
-					b.rbs = b.rbs[:len(b.rbs)-1]
-					break
-				}
-			}
-		default:
-			grpclog.Errorf("Unknown update.Op %v", update.Op)
-		}
-	}
-	// TODO: Fall back to the basic round-robin load balancing if the resulting address is
-	// not a load balancer.
-	select {
-	case <-ch:
-	default:
-	}
-	ch <- b.rbs
-	return nil
 }
 
-func convertDuration(d *lbmpb.Duration) time.Duration {
+// regeneratePicker takes a snapshot of the balancer, and generates a picker from
-	if d == nil {
+// it. The picker
-		return 0
+//  - always returns ErrTransientFailure if the balancer is in TransientFailure,
-	}
+//  - does two layer roundrobin pick otherwise.
-	return time.Duration(d.Seconds)*time.Second + time.Duration(d.Nanos)*time.Nanosecond
+// Caller must hold lb.mu.
-}
+func (lb *lbBalancer) regeneratePicker() {
-
+	if lb.state == connectivity.TransientFailure {
-func (b *grpclbBalancer) processServerList(l *lbmpb.ServerList, seq int) {
+		lb.picker = &errPicker{err: balancer.ErrTransientFailure}
-	if l == nil {
 		return
 	}
-	servers := l.GetServers()
+	var readySCs []balancer.SubConn
-	var (
+	for _, a := range lb.backendAddrs {
-		sl    []*grpclbAddrInfo
+		if sc, ok := lb.subConns[a]; ok {
-		addrs []Address
+			if st, ok := lb.scStates[sc]; ok && st == connectivity.Ready {
-	)
+				readySCs = append(readySCs, sc)
-	for _, s := range servers {
+			}
-		md := metadata.Pairs("lb-token", s.LoadBalanceToken)
-		ip := net.IP(s.IpAddress)
-		ipStr := ip.String()
-		if ip.To4() == nil {
-			// Add square brackets to ipv6 addresses, otherwise net.Dial() and
-			// net.SplitHostPort() will return too many colons error.
-			ipStr = fmt.Sprintf("[%s]", ipStr)
 		}
-		addr := Address{
-			Addr:     fmt.Sprintf("%s:%d", ipStr, s.Port),
-			Metadata: &md,
-		}
-		sl = append(sl, &grpclbAddrInfo{
-			addr:                 addr,
-			dropForRateLimiting:  s.DropForRateLimiting,
-			dropForLoadBalancing: s.DropForLoadBalancing,
-		})
-		addrs = append(addrs, addr)
 	}
-	b.mu.Lock()
+
-	defer b.mu.Unlock()
+	if len(lb.fullServerList) <= 0 {
-	if b.done || seq < b.seq {
+		if len(readySCs) <= 0 {
+			lb.picker = &errPicker{err: balancer.ErrNoSubConnAvailable}
+			return
+		}
+		lb.picker = &rrPicker{subConns: readySCs}
 		return
 	}
-	if len(sl) > 0 {
+	lb.picker = &lbPicker{
-		// reset b.next to 0 when replacing the server list.
+		serverList: lb.fullServerList,
-		b.next = 0
+		subConns:   readySCs,
-		b.addrs = sl
+		stats:      lb.clientStats,
-		b.addrCh <- addrs
 	}
 	return
 }
 
-func (b *grpclbBalancer) sendLoadReport(s *balanceLoadClientStream, interval time.Duration, done <-chan struct{}) {
+func (lb *lbBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
-	ticker := time.NewTicker(interval)
+	grpclog.Infof("lbBalancer: handle SubConn state change: %p, %v", sc, s)
-	defer ticker.Stop()
+	lb.mu.Lock()
-	for {
+	defer lb.mu.Unlock()
-		select {
+
-		case <-ticker.C:
+	oldS, ok := lb.scStates[sc]
-		case <-done:
+	if !ok {
-			return
+		grpclog.Infof("lbBalancer: got state changes for an unknown SubConn: %p, %v", sc, s)
-		}
+		return
-		b.mu.Lock()
+	}
-		stats := b.clientStats
+	lb.scStates[sc] = s
-		b.clientStats = lbmpb.ClientStats{} // Clear the stats.
+	switch s {
-		b.mu.Unlock()
+	case connectivity.Idle:
-		t := time.Now()
+		sc.Connect()
-		stats.Timestamp = &lbmpb.Timestamp{
+	case connectivity.Shutdown:
-			Seconds: t.Unix(),
+		// When an address was removed by resolver, b called RemoveSubConn but
-			Nanos:   int32(t.Nanosecond()),
+		// kept the sc's state in scStates. Remove state for this sc here.
-		}
+		delete(lb.scStates, sc)
-		if err := s.Send(&lbmpb.LoadBalanceRequest{
+	}
-			LoadBalanceRequestType: &lbmpb.LoadBalanceRequest_ClientStats{
+
-				ClientStats: &stats,
+	oldAggrState := lb.state
-			},
+	lb.state = lb.csEvltr.recordTransition(oldS, s)
-		}); err != nil {
+
-			grpclog.Errorf("grpclb: failed to send load report: %v", err)
+	// Regenerate picker when one of the following happens:
+	//  - this sc became ready from not-ready
+	//  - this sc became not-ready from ready
+	//  - the aggregated state of balancer became TransientFailure from non-TransientFailure
+	//  - the aggregated state of balancer became non-TransientFailure from TransientFailure
+	if (oldS == connectivity.Ready) != (s == connectivity.Ready) ||
+		(lb.state == connectivity.TransientFailure) != (oldAggrState == connectivity.TransientFailure) {
+		lb.regeneratePicker()
+	}
+
+	lb.cc.UpdateBalancerState(lb.state, lb.picker)
+	return
+}
+
+// fallbackToBackendsAfter blocks for fallbackTimeout and falls back to use
+// resolved backends (backends received from resolver, not from remote balancer)
+// if no connection to remote balancers was successful.
+func (lb *lbBalancer) fallbackToBackendsAfter(fallbackTimeout time.Duration) {
+	timer := time.NewTimer(fallbackTimeout)
+	defer timer.Stop()
+	select {
+	case <-timer.C:
+	case <-lb.doneCh:
+		return
+	}
+	lb.mu.Lock()
+	if lb.serverListReceived {
+		lb.mu.Unlock()
+		return
+	}
+	lb.fallbackTimerExpired = true
+	lb.refreshSubConns(lb.resolvedBackendAddrs)
+	lb.mu.Unlock()
+}
+
+// HandleResolvedAddrs sends the updated remoteLB addresses to remoteLB
+// clientConn. The remoteLB clientConn will handle creating/removing remoteLB
+// connections.
+func (lb *lbBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
+	grpclog.Infof("lbBalancer: handleResolvedResult: %+v", addrs)
+	if len(addrs) <= 0 {
+		return
+	}
+
+	var remoteBalancerAddrs, backendAddrs []resolver.Address
+	for _, a := range addrs {
+		if a.Type == resolver.GRPCLB {
+			remoteBalancerAddrs = append(remoteBalancerAddrs, a)
+		} else {
+			backendAddrs = append(backendAddrs, a)
+		}
+	}
+
+	if lb.ccRemoteLB == nil {
+		if len(remoteBalancerAddrs) <= 0 {
+			grpclog.Errorf("grpclb: no remote balancer address is available, should never happen")
 			return
 		}
+		// First time receiving resolved addresses, create a cc to remote
+		// balancers.
+		lb.dialRemoteLB(remoteBalancerAddrs[0].ServerName)
+		// Start the fallback goroutine.
+		go lb.fallbackToBackendsAfter(lb.fallbackTimeout)
 	}
+
+	// cc to remote balancers uses lb.manualResolver. Send the updated remote
+	// balancer addresses to it through manualResolver.
+	lb.manualResolver.NewAddress(remoteBalancerAddrs)
+
+	lb.mu.Lock()
+	lb.resolvedBackendAddrs = backendAddrs
+	// If serverListReceived is true, connection to remote balancer was
+	// successful and there's no need to do fallback anymore.
+	// If fallbackTimerExpired is false, fallback hasn't happened yet.
+	if !lb.serverListReceived && lb.fallbackTimerExpired {
+		// This means we received a new list of resolved backends, and we are
+		// still in fallback mode. Need to update the list of backends we are
+		// using to the new list of backends.
+		lb.refreshSubConns(lb.resolvedBackendAddrs)
+	}
+	lb.mu.Unlock()
 }
 
-func (b *grpclbBalancer) callRemoteBalancer(lbc *loadBalancerClient, seq int) (retry bool) {
+func (lb *lbBalancer) Close() {
-	ctx, cancel := context.WithCancel(context.Background())
+	select {
-	defer cancel()
+	case <-lb.doneCh:
-	stream, err := lbc.BalanceLoad(ctx)
-	if err != nil {
-		grpclog.Errorf("grpclb: failed to perform RPC to the remote balancer %v", err)
 		return
+	default:
 	}
-	b.mu.Lock()
+	close(lb.doneCh)
-	if b.done {
+	if lb.ccRemoteLB != nil {
-		b.mu.Unlock()
+		lb.ccRemoteLB.Close()
-		return
-	}
-	b.mu.Unlock()
-	initReq := &lbmpb.LoadBalanceRequest{
-		LoadBalanceRequestType: &lbmpb.LoadBalanceRequest_InitialRequest{
-			InitialRequest: &lbmpb.InitialLoadBalanceRequest{
-				Name: b.target,
-			},
-		},
-	}
-	if err := stream.Send(initReq); err != nil {
-		grpclog.Errorf("grpclb: failed to send init request: %v", err)
-		// TODO: backoff on retry?
-		return true
-	}
-	reply, err := stream.Recv()
-	if err != nil {
-		grpclog.Errorf("grpclb: failed to recv init response: %v", err)
-		// TODO: backoff on retry?
-		return true
-	}
-	initResp := reply.GetInitialResponse()
-	if initResp == nil {
-		grpclog.Errorf("grpclb: reply from remote balancer did not include initial response.")
-		return
-	}
-	// TODO: Support delegation.
-	if initResp.LoadBalancerDelegate != "" {
-		// delegation
-		grpclog.Errorf("TODO: Delegation is not supported yet.")
-		return
-	}
-	streamDone := make(chan struct{})
-	defer close(streamDone)
-	b.mu.Lock()
-	b.clientStats = lbmpb.ClientStats{} // Clear client stats.
-	b.mu.Unlock()
-	if d := convertDuration(initResp.ClientStatsReportInterval); d > 0 {
-		go b.sendLoadReport(stream, d, streamDone)
-	}
-	// Retrieve the server list.
-	for {
-		reply, err := stream.Recv()
-		if err != nil {
-			grpclog.Errorf("grpclb: failed to recv server list: %v", err)
-			break
-		}
-		b.mu.Lock()
-		if b.done || seq < b.seq {
-			b.mu.Unlock()
-			return
-		}
-		b.seq++ // tick when receiving a new list of servers.
-		seq = b.seq
-		b.mu.Unlock()
-		if serverList := reply.GetServerList(); serverList != nil {
-			b.processServerList(serverList, seq)
-		}
-	}
-	return true
-}
-
-func (b *grpclbBalancer) Start(target string, config BalancerConfig) error {
-	b.rand = rand.New(rand.NewSource(time.Now().Unix()))
-	// TODO: Fall back to the basic direct connection if there is no name resolver.
-	if b.r == nil {
-		return errors.New("there is no name resolver installed")
-	}
-	b.target = target
-	b.mu.Lock()
-	if b.done {
-		b.mu.Unlock()
-		return ErrClientConnClosing
-	}
-	b.addrCh = make(chan []Address)
-	w, err := b.r.Resolve(target)
-	if err != nil {
-		b.mu.Unlock()
-		grpclog.Errorf("grpclb: failed to resolve address: %v, err: %v", target, err)
-		return err
-	}
-	b.w = w
-	b.mu.Unlock()
-	balancerAddrsCh := make(chan []remoteBalancerInfo, 1)
-	// Spawn a goroutine to monitor the name resolution of remote load balancer.
-	go func() {
-		for {
-			if err := b.watchAddrUpdates(w, balancerAddrsCh); err != nil {
-				grpclog.Warningf("grpclb: the naming watcher stops working due to %v.\n", err)
-				close(balancerAddrsCh)
-				return
-			}
-		}
-	}()
-	// Spawn a goroutine to talk to the remote load balancer.
-	go func() {
-		var (
-			cc *ClientConn
-			// ccError is closed when there is an error in the current cc.
-			// A new rb should be picked from rbs and connected.
-			ccError chan struct{}
-			rb      *remoteBalancerInfo
-			rbs     []remoteBalancerInfo
-			rbIdx   int
-		)
-
-		defer func() {
-			if ccError != nil {
-				select {
-				case <-ccError:
-				default:
-					close(ccError)
-				}
-			}
-			if cc != nil {
-				cc.Close()
-			}
-		}()
-
-		for {
-			var ok bool
-			select {
-			case rbs, ok = <-balancerAddrsCh:
-				if !ok {
-					return
-				}
-				foundIdx := -1
-				if rb != nil {
-					for i, trb := range rbs {
-						if trb == *rb {
-							foundIdx = i
-							break
-						}
-					}
-				}
-				if foundIdx >= 0 {
-					if foundIdx >= 1 {
-						// Move the address in use to the beginning of the list.
-						b.rbs[0], b.rbs[foundIdx] = b.rbs[foundIdx], b.rbs[0]
-						rbIdx = 0
-					}
-					continue // If found, don't dial new cc.
-				} else if len(rbs) > 0 {
-					// Pick a random one from the list, instead of always using the first one.
-					if l := len(rbs); l > 1 && rb != nil {
-						tmpIdx := b.rand.Intn(l - 1)
-						b.rbs[0], b.rbs[tmpIdx] = b.rbs[tmpIdx], b.rbs[0]
-					}
-					rbIdx = 0
-					rb = &rbs[0]
-				} else {
-					// foundIdx < 0 && len(rbs) <= 0.
-					rb = nil
-				}
-			case <-ccError:
-				ccError = nil
-				if rbIdx < len(rbs)-1 {
-					rbIdx++
-					rb = &rbs[rbIdx]
-				} else {
-					rb = nil
-				}
-			}
-
-			if rb == nil {
-				continue
-			}
-
-			if cc != nil {
-				cc.Close()
-			}
-			// Talk to the remote load balancer to get the server list.
-			var (
-				err   error
-				dopts []DialOption
-			)
-			if creds := config.DialCreds; creds != nil {
-				if rb.name != "" {
-					if err := creds.OverrideServerName(rb.name); err != nil {
-						grpclog.Warningf("grpclb: failed to override the server name in the credentials: %v", err)
-						continue
-					}
-				}
-				dopts = append(dopts, WithTransportCredentials(creds))
-			} else {
-				dopts = append(dopts, WithInsecure())
-			}
-			if dialer := config.Dialer; dialer != nil {
-				// WithDialer takes a different type of function, so we instead use a special DialOption here.
-				dopts = append(dopts, func(o *dialOptions) { o.copts.Dialer = dialer })
-			}
-			dopts = append(dopts, WithBlock())
-			ccError = make(chan struct{})
-			ctx, cancel := context.WithTimeout(context.Background(), time.Second)
-			cc, err = DialContext(ctx, rb.addr, dopts...)
-			cancel()
-			if err != nil {
-				grpclog.Warningf("grpclb: failed to setup a connection to the remote balancer %v: %v", rb.addr, err)
-				close(ccError)
-				continue
-			}
-			b.mu.Lock()
-			b.seq++ // tick when getting a new balancer address
-			seq := b.seq
-			b.next = 0
-			b.mu.Unlock()
-			go func(cc *ClientConn, ccError chan struct{}) {
-				lbc := &loadBalancerClient{cc}
-				b.callRemoteBalancer(lbc, seq)
-				cc.Close()
-				select {
-				case <-ccError:
-				default:
-					close(ccError)
-				}
-			}(cc, ccError)
-		}
-	}()
-	return nil
-}
-
-func (b *grpclbBalancer) down(addr Address, err error) {
-	b.mu.Lock()
-	defer b.mu.Unlock()
-	for _, a := range b.addrs {
-		if addr == a.addr {
-			a.connected = false
-			break
-		}
 	}
 }
-
-func (b *grpclbBalancer) Up(addr Address) func(error) {
-	b.mu.Lock()
-	defer b.mu.Unlock()
-	if b.done {
-		return nil
-	}
-	var cnt int
-	for _, a := range b.addrs {
-		if a.addr == addr {
-			if a.connected {
-				return nil
-			}
-			a.connected = true
-		}
-		if a.connected && !a.dropForRateLimiting && !a.dropForLoadBalancing {
-			cnt++
-		}
-	}
-	// addr is the only one which is connected. Notify the Get() callers who are blocking.
-	if cnt == 1 && b.waitCh != nil {
-		close(b.waitCh)
-		b.waitCh = nil
-	}
-	return func(err error) {
-		b.down(addr, err)
-	}
-}
-
-func (b *grpclbBalancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) {
-	var ch chan struct{}
-	b.mu.Lock()
-	if b.done {
-		b.mu.Unlock()
-		err = ErrClientConnClosing
-		return
-	}
-	seq := b.seq
-
-	defer func() {
-		if err != nil {
-			return
-		}
-		put = func() {
-			s, ok := rpcInfoFromContext(ctx)
-			if !ok {
-				return
-			}
-			b.mu.Lock()
-			defer b.mu.Unlock()
-			if b.done || seq < b.seq {
-				return
-			}
-			b.clientStats.NumCallsFinished++
-			if !s.bytesSent {
-				b.clientStats.NumCallsFinishedWithClientFailedToSend++
-			} else if s.bytesReceived {
-				b.clientStats.NumCallsFinishedKnownReceived++
-			}
-		}
-	}()
-
-	b.clientStats.NumCallsStarted++
-	if len(b.addrs) > 0 {
-		if b.next >= len(b.addrs) {
-			b.next = 0
-		}
-		next := b.next
-		for {
-			a := b.addrs[next]
-			next = (next + 1) % len(b.addrs)
-			if a.connected {
-				if !a.dropForRateLimiting && !a.dropForLoadBalancing {
-					addr = a.addr
-					b.next = next
-					b.mu.Unlock()
-					return
-				}
-				if !opts.BlockingWait {
-					b.next = next
-					if a.dropForLoadBalancing {
-						b.clientStats.NumCallsFinished++
-						b.clientStats.NumCallsFinishedWithDropForLoadBalancing++
-					} else if a.dropForRateLimiting {
-						b.clientStats.NumCallsFinished++
-						b.clientStats.NumCallsFinishedWithDropForRateLimiting++
-					}
-					b.mu.Unlock()
-					err = Errorf(codes.Unavailable, "%s drops requests", a.addr.Addr)
-					return
-				}
-			}
-			if next == b.next {
-				// Has iterated all the possible address but none is connected.
-				break
-			}
-		}
-	}
-	if !opts.BlockingWait {
-		b.clientStats.NumCallsFinished++
-		b.clientStats.NumCallsFinishedWithClientFailedToSend++
-		b.mu.Unlock()
-		err = Errorf(codes.Unavailable, "there is no address available")
-		return
-	}
-	// Wait on b.waitCh for non-failfast RPCs.
-	if b.waitCh == nil {
-		ch = make(chan struct{})
-		b.waitCh = ch
-	} else {
-		ch = b.waitCh
-	}
-	b.mu.Unlock()
-	for {
-		select {
-		case <-ctx.Done():
-			b.mu.Lock()
-			b.clientStats.NumCallsFinished++
-			b.clientStats.NumCallsFinishedWithClientFailedToSend++
-			b.mu.Unlock()
-			err = ctx.Err()
-			return
-		case <-ch:
-			b.mu.Lock()
-			if b.done {
-				b.clientStats.NumCallsFinished++
-				b.clientStats.NumCallsFinishedWithClientFailedToSend++
-				b.mu.Unlock()
-				err = ErrClientConnClosing
-				return
-			}
-
-			if len(b.addrs) > 0 {
-				if b.next >= len(b.addrs) {
-					b.next = 0
-				}
-				next := b.next
-				for {
-					a := b.addrs[next]
-					next = (next + 1) % len(b.addrs)
-					if a.connected {
-						if !a.dropForRateLimiting && !a.dropForLoadBalancing {
-							addr = a.addr
-							b.next = next
-							b.mu.Unlock()
-							return
-						}
-						if !opts.BlockingWait {
-							b.next = next
-							if a.dropForLoadBalancing {
-								b.clientStats.NumCallsFinished++
-								b.clientStats.NumCallsFinishedWithDropForLoadBalancing++
-							} else if a.dropForRateLimiting {
-								b.clientStats.NumCallsFinished++
-								b.clientStats.NumCallsFinishedWithDropForRateLimiting++
-							}
-							b.mu.Unlock()
-							err = Errorf(codes.Unavailable, "drop requests for the addreess %s", a.addr.Addr)
-							return
-						}
-					}
-					if next == b.next {
-						// Has iterated all the possible address but none is connected.
-						break
-					}
-				}
-			}
-			// The newly added addr got removed by Down() again.
-			if b.waitCh == nil {
-				ch = make(chan struct{})
-				b.waitCh = ch
-			} else {
-				ch = b.waitCh
-			}
-			b.mu.Unlock()
-		}
-	}
-}
-
-func (b *grpclbBalancer) Notify() <-chan []Address {
-	return b.addrCh
-}
-
-func (b *grpclbBalancer) Close() error {
-	b.mu.Lock()
-	defer b.mu.Unlock()
-	if b.done {
-		return errBalancerClosed
-	}
-	b.done = true
-	if b.waitCh != nil {
-		close(b.waitCh)
-	}
-	if b.addrCh != nil {
-		close(b.addrCh)
-	}
-	if b.w != nil {
-		b.w.Close()
-	}
-	return nil
-}

vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages/messages.proto

@@ -15,7 +15,7 @@
 syntax = "proto3";
 
 package grpc.lb.v1;
-option go_package = "messages";
+option go_package = "google.golang.org/grpc/grpclb/grpc_lb_v1/messages";
 
 message Duration {
   // Signed seconds of the span of time. Must be from -315,576,000,000

vendor/google.golang.org/grpc/grpclb_picker.go

@@ -0,0 +1,159 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"sync"
+	"sync/atomic"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/codes"
+	lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
+	"google.golang.org/grpc/status"
+)
+
+type rpcStats struct {
+	NumCallsStarted                          int64
+	NumCallsFinished                         int64
+	NumCallsFinishedWithDropForRateLimiting  int64
+	NumCallsFinishedWithDropForLoadBalancing int64
+	NumCallsFinishedWithClientFailedToSend   int64
+	NumCallsFinishedKnownReceived            int64
+}
+
+// toClientStats converts rpcStats to lbpb.ClientStats, and clears rpcStats.
+func (s *rpcStats) toClientStats() *lbpb.ClientStats {
+	stats := &lbpb.ClientStats{
+		NumCallsStarted:                          atomic.SwapInt64(&s.NumCallsStarted, 0),
+		NumCallsFinished:                         atomic.SwapInt64(&s.NumCallsFinished, 0),
+		NumCallsFinishedWithDropForRateLimiting:  atomic.SwapInt64(&s.NumCallsFinishedWithDropForRateLimiting, 0),
+		NumCallsFinishedWithDropForLoadBalancing: atomic.SwapInt64(&s.NumCallsFinishedWithDropForLoadBalancing, 0),
+		NumCallsFinishedWithClientFailedToSend:   atomic.SwapInt64(&s.NumCallsFinishedWithClientFailedToSend, 0),
+		NumCallsFinishedKnownReceived:            atomic.SwapInt64(&s.NumCallsFinishedKnownReceived, 0),
+	}
+	return stats
+}
+
+func (s *rpcStats) dropForRateLimiting() {
+	atomic.AddInt64(&s.NumCallsStarted, 1)
+	atomic.AddInt64(&s.NumCallsFinishedWithDropForRateLimiting, 1)
+	atomic.AddInt64(&s.NumCallsFinished, 1)
+}
+
+func (s *rpcStats) dropForLoadBalancing() {
+	atomic.AddInt64(&s.NumCallsStarted, 1)
+	atomic.AddInt64(&s.NumCallsFinishedWithDropForLoadBalancing, 1)
+	atomic.AddInt64(&s.NumCallsFinished, 1)
+}
+
+func (s *rpcStats) failedToSend() {
+	atomic.AddInt64(&s.NumCallsStarted, 1)
+	atomic.AddInt64(&s.NumCallsFinishedWithClientFailedToSend, 1)
+	atomic.AddInt64(&s.NumCallsFinished, 1)
+}
+
+func (s *rpcStats) knownReceived() {
+	atomic.AddInt64(&s.NumCallsStarted, 1)
+	atomic.AddInt64(&s.NumCallsFinishedKnownReceived, 1)
+	atomic.AddInt64(&s.NumCallsFinished, 1)
+}
+
+type errPicker struct {
+	// Pick always returns this err.
+	err error
+}
+
+func (p *errPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
+	return nil, nil, p.err
+}
+
+// rrPicker does roundrobin on subConns. It's typically used when there's no
+// response from remote balancer, and grpclb falls back to the resolved
+// backends.
+//
+// It guaranteed that len(subConns) > 0.
+type rrPicker struct {
+	mu           sync.Mutex
+	subConns     []balancer.SubConn // The subConns that were READY when taking the snapshot.
+	subConnsNext int
+}
+
+func (p *rrPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	sc := p.subConns[p.subConnsNext]
+	p.subConnsNext = (p.subConnsNext + 1) % len(p.subConns)
+	return sc, nil, nil
+}
+
+// lbPicker does two layers of picks:
+//
+// First layer: roundrobin on all servers in serverList, including drops and backends.
+// - If it picks a drop, the RPC will fail as being dropped.
+// - If it picks a backend, do a second layer pick to pick the real backend.
+//
+// Second layer: roundrobin on all READY backends.
+//
+// It's guaranteed that len(serverList) > 0.
+type lbPicker struct {
+	mu             sync.Mutex
+	serverList     []*lbpb.Server
+	serverListNext int
+	subConns       []balancer.SubConn // The subConns that were READY when taking the snapshot.
+	subConnsNext   int
+
+	stats *rpcStats
+}
+
+func (p *lbPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	// Layer one roundrobin on serverList.
+	s := p.serverList[p.serverListNext]
+	p.serverListNext = (p.serverListNext + 1) % len(p.serverList)
+
+	// If it's a drop, return an error and fail the RPC.
+	if s.DropForRateLimiting {
+		p.stats.dropForRateLimiting()
+		return nil, nil, status.Errorf(codes.Unavailable, "request dropped by grpclb")
+	}
+	if s.DropForLoadBalancing {
+		p.stats.dropForLoadBalancing()
+		return nil, nil, status.Errorf(codes.Unavailable, "request dropped by grpclb")
+	}
+
+	// If not a drop but there's no ready subConns.
+	if len(p.subConns) <= 0 {
+		return nil, nil, balancer.ErrNoSubConnAvailable
+	}
+
+	// Return the next ready subConn in the list, also collect rpc stats.
+	sc := p.subConns[p.subConnsNext]
+	p.subConnsNext = (p.subConnsNext + 1) % len(p.subConns)
+	done := func(info balancer.DoneInfo) {
+		if !info.BytesSent {
+			p.stats.failedToSend()
+		} else if info.BytesReceived {
+			p.stats.knownReceived()
+		}
+	}
+	return sc, done, nil
+}

vendor/google.golang.org/grpc/grpclb_remote_balancer.go

@@ -0,0 +1,254 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"fmt"
+	"net"
+	"reflect"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/connectivity"
+	lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/resolver"
+)
+
+// processServerList updates balaner's internal state, create/remove SubConns
+// and regenerates picker using the received serverList.
+func (lb *lbBalancer) processServerList(l *lbpb.ServerList) {
+	grpclog.Infof("lbBalancer: processing server list: %+v", l)
+	lb.mu.Lock()
+	defer lb.mu.Unlock()
+
+	// Set serverListReceived to true so fallback will not take effect if it has
+	// not hit timeout.
+	lb.serverListReceived = true
+
+	// If the new server list == old server list, do nothing.
+	if reflect.DeepEqual(lb.fullServerList, l.Servers) {
+		grpclog.Infof("lbBalancer: new serverlist same as the previous one, ignoring")
+		return
+	}
+	lb.fullServerList = l.Servers
+
+	var backendAddrs []resolver.Address
+	for _, s := range l.Servers {
+		if s.DropForLoadBalancing || s.DropForRateLimiting {
+			continue
+		}
+
+		md := metadata.Pairs(lbTokeyKey, s.LoadBalanceToken)
+		ip := net.IP(s.IpAddress)
+		ipStr := ip.String()
+		if ip.To4() == nil {
+			// Add square brackets to ipv6 addresses, otherwise net.Dial() and
+			// net.SplitHostPort() will return too many colons error.
+			ipStr = fmt.Sprintf("[%s]", ipStr)
+		}
+		addr := resolver.Address{
+			Addr:     fmt.Sprintf("%s:%d", ipStr, s.Port),
+			Metadata: &md,
+		}
+
+		backendAddrs = append(backendAddrs, addr)
+	}
+
+	// Call refreshSubConns to create/remove SubConns.
+	backendsUpdated := lb.refreshSubConns(backendAddrs)
+	// If no backend was updated, no SubConn will be newed/removed. But since
+	// the full serverList was different, there might be updates in drops or
+	// pick weights(different number of duplicates). We need to update picker
+	// with the fulllist.
+	if !backendsUpdated {
+		lb.regeneratePicker()
+		lb.cc.UpdateBalancerState(lb.state, lb.picker)
+	}
+}
+
+// refreshSubConns creates/removes SubConns with backendAddrs. It returns a bool
+// indicating whether the backendAddrs are different from the cached
+// backendAddrs (whether any SubConn was newed/removed).
+// Caller must hold lb.mu.
+func (lb *lbBalancer) refreshSubConns(backendAddrs []resolver.Address) bool {
+	lb.backendAddrs = nil
+	var backendsUpdated bool
+	// addrsSet is the set converted from backendAddrs, it's used to quick
+	// lookup for an address.
+	addrsSet := make(map[resolver.Address]struct{})
+	// Create new SubConns.
+	for _, addr := range backendAddrs {
+		addrWithoutMD := addr
+		addrWithoutMD.Metadata = nil
+		addrsSet[addrWithoutMD] = struct{}{}
+		lb.backendAddrs = append(lb.backendAddrs, addrWithoutMD)
+
+		if _, ok := lb.subConns[addrWithoutMD]; !ok {
+			backendsUpdated = true
+
+			// Use addrWithMD to create the SubConn.
+			sc, err := lb.cc.NewSubConn([]resolver.Address{addr}, balancer.NewSubConnOptions{})
+			if err != nil {
+				grpclog.Warningf("roundrobinBalancer: failed to create new SubConn: %v", err)
+				continue
+			}
+			lb.subConns[addrWithoutMD] = sc // Use the addr without MD as key for the map.
+			lb.scStates[sc] = connectivity.Idle
+			sc.Connect()
+		}
+	}
+
+	for a, sc := range lb.subConns {
+		// a was removed by resolver.
+		if _, ok := addrsSet[a]; !ok {
+			backendsUpdated = true
+
+			lb.cc.RemoveSubConn(sc)
+			delete(lb.subConns, a)
+			// Keep the state of this sc in b.scStates until sc's state becomes Shutdown.
+			// The entry will be deleted in HandleSubConnStateChange.
+		}
+	}
+
+	return backendsUpdated
+}
+
+func (lb *lbBalancer) readServerList(s *balanceLoadClientStream) error {
+	for {
+		reply, err := s.Recv()
+		if err != nil {
+			return fmt.Errorf("grpclb: failed to recv server list: %v", err)
+		}
+		if serverList := reply.GetServerList(); serverList != nil {
+			lb.processServerList(serverList)
+		}
+	}
+}
+
+func (lb *lbBalancer) sendLoadReport(s *balanceLoadClientStream, interval time.Duration) {
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ticker.C:
+		case <-s.Context().Done():
+			return
+		}
+		stats := lb.clientStats.toClientStats()
+		t := time.Now()
+		stats.Timestamp = &lbpb.Timestamp{
+			Seconds: t.Unix(),
+			Nanos:   int32(t.Nanosecond()),
+		}
+		if err := s.Send(&lbpb.LoadBalanceRequest{
+			LoadBalanceRequestType: &lbpb.LoadBalanceRequest_ClientStats{
+				ClientStats: stats,
+			},
+		}); err != nil {
+			return
+		}
+	}
+}
+func (lb *lbBalancer) callRemoteBalancer() error {
+	lbClient := &loadBalancerClient{cc: lb.ccRemoteLB}
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	stream, err := lbClient.BalanceLoad(ctx, FailFast(false))
+	if err != nil {
+		return fmt.Errorf("grpclb: failed to perform RPC to the remote balancer %v", err)
+	}
+
+	// grpclb handshake on the stream.
+	initReq := &lbpb.LoadBalanceRequest{
+		LoadBalanceRequestType: &lbpb.LoadBalanceRequest_InitialRequest{
+			InitialRequest: &lbpb.InitialLoadBalanceRequest{
+				Name: lb.target,
+			},
+		},
+	}
+	if err := stream.Send(initReq); err != nil {
+		return fmt.Errorf("grpclb: failed to send init request: %v", err)
+	}
+	reply, err := stream.Recv()
+	if err != nil {
+		return fmt.Errorf("grpclb: failed to recv init response: %v", err)
+	}
+	initResp := reply.GetInitialResponse()
+	if initResp == nil {
+		return fmt.Errorf("grpclb: reply from remote balancer did not include initial response")
+	}
+	if initResp.LoadBalancerDelegate != "" {
+		return fmt.Errorf("grpclb: Delegation is not supported")
+	}
+
+	go func() {
+		if d := convertDuration(initResp.ClientStatsReportInterval); d > 0 {
+			lb.sendLoadReport(stream, d)
+		}
+	}()
+	return lb.readServerList(stream)
+}
+
+func (lb *lbBalancer) watchRemoteBalancer() {
+	for {
+		err := lb.callRemoteBalancer()
+		select {
+		case <-lb.doneCh:
+			return
+		default:
+			if err != nil {
+				grpclog.Error(err)
+			}
+		}
+
+	}
+}
+
+func (lb *lbBalancer) dialRemoteLB(remoteLBName string) {
+	var dopts []DialOption
+	if creds := lb.opt.DialCreds; creds != nil {
+		if err := creds.OverrideServerName(remoteLBName); err == nil {
+			dopts = append(dopts, WithTransportCredentials(creds))
+		} else {
+			grpclog.Warningf("grpclb: failed to override the server name in the credentials: %v, using Insecure", err)
+			dopts = append(dopts, WithInsecure())
+		}
+	} else {
+		dopts = append(dopts, WithInsecure())
+	}
+	if lb.opt.Dialer != nil {
+		// WithDialer takes a different type of function, so we instead use a
+		// special DialOption here.
+		dopts = append(dopts, withContextDialer(lb.opt.Dialer))
+	}
+	// Explicitly set pickfirst as the balancer.
+	dopts = append(dopts, WithBalancerName(PickFirstBalancerName))
+	dopts = append(dopts, withResolverBuilder(lb.manualResolver))
+	// Dial using manualResolver.Scheme, which is a random scheme generated
+	// when init grpclb. The target name is not important.
+	cc, err := Dial("grpclb:///grpclb.server", dopts...)
+	if err != nil {
+		grpclog.Fatalf("failed to dial: %v", err)
+	}
+	lb.ccRemoteLB = cc
+	go lb.watchRemoteBalancer()
+}

vendor/google.golang.org/grpc/grpclb_util.go

@@ -0,0 +1,90 @@
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/resolver"
+)
+
+// The parent ClientConn should re-resolve when grpclb loses connection to the
+// remote balancer. When the ClientConn inside grpclb gets a TransientFailure,
+// it calls lbManualResolver.ResolveNow(), which calls parent ClientConn's
+// ResolveNow, and eventually results in re-resolve happening in parent
+// ClientConn's resolver (DNS for example).
+//
+//                          parent
+//                          ClientConn
+//  +-----------------------------------------------------------------+
+//  |             parent          +---------------------------------+ |
+//  | DNS         ClientConn      |  grpclb                         | |
+//  | resolver    balancerWrapper |                                 | |
+//  | +              +            |    grpclb          grpclb       | |
+//  | |              |            |    ManualResolver  ClientConn   | |
+//  | |              |            |     +              +            | |
+//  | |              |            |     |              | Transient  | |
+//  | |              |            |     |              | Failure    | |
+//  | |              |            |     |  <---------  |            | |
+//  | |              | <--------------- |  ResolveNow  |            | |
+//  | |  <---------  | ResolveNow |     |              |            | |
+//  | |  ResolveNow  |            |     |              |            | |
+//  | |              |            |     |              |            | |
+//  | +              +            |     +              +            | |
+//  |                             +---------------------------------+ |
+//  +-----------------------------------------------------------------+
+
+// lbManualResolver is used by the ClientConn inside grpclb. It's a manual
+// resolver with a special ResolveNow() function.
+//
+// When ResolveNow() is called, it calls ResolveNow() on the parent ClientConn,
+// so when grpclb client lose contact with remote balancers, the parent
+// ClientConn's resolver will re-resolve.
+type lbManualResolver struct {
+	scheme string
+	ccr    resolver.ClientConn
+
+	ccb balancer.ClientConn
+}
+
+func (r *lbManualResolver) Build(_ resolver.Target, cc resolver.ClientConn, _ resolver.BuildOption) (resolver.Resolver, error) {
+	r.ccr = cc
+	return r, nil
+}
+
+func (r *lbManualResolver) Scheme() string {
+	return r.scheme
+}
+
+// ResolveNow calls resolveNow on the parent ClientConn.
+func (r *lbManualResolver) ResolveNow(o resolver.ResolveNowOption) {
+	r.ccb.ResolveNow(o)
+}
+
+// Close is a noop for Resolver.
+func (*lbManualResolver) Close() {}
+
+// NewAddress calls cc.NewAddress.
+func (r *lbManualResolver) NewAddress(addrs []resolver.Address) {
+	r.ccr.NewAddress(addrs)
+}
+
+// NewServiceConfig calls cc.NewServiceConfig.
+func (r *lbManualResolver) NewServiceConfig(sc string) {
+	r.ccr.NewServiceConfig(sc)
+}

vendor/google.golang.org/grpc/health/health.go

@@ -26,9 +26,9 @@ import (
 	"sync"
 
 	"golang.org/x/net/context"
-	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	healthpb "google.golang.org/grpc/health/grpc_health_v1"
+	"google.golang.org/grpc/status"
 )
 
 // Server implements `service Health`.
@@ -60,7 +60,7 @@ func (s *Server) Check(ctx context.Context, in *healthpb.HealthCheckRequest) (*h
 			Status: status,
 		}, nil
 	}
-	return nil, grpc.Errorf(codes.NotFound, "unknown service")
+	return nil, status.Error(codes.NotFound, "unknown service")
 }
 
 // SetServingStatus is called when need to reset the serving status of a service

vendor/google.golang.org/grpc/internal/internal.go

@@ -19,13 +19,6 @@
 // the godoc of the top-level grpc package.
 package internal
 
-// TestingCloseConns closes all existing transports but keeps
-// grpcServer.lis accepting new connections.
-//
-// The provided grpcServer must be of type *grpc.Server. It is untyped
-// for circular dependency reasons.
-var TestingCloseConns func(grpcServer interface{})
-
 // TestingUseHandlerImpl enables the http.Handler-based server implementation.
 // It must be called before Serve and requires TLS credentials.
 //

vendor/google.golang.org/grpc/metadata/metadata.go

@@ -17,7 +17,8 @@
  */
 
 // Package metadata define the structure of the metadata supported by gRPC library.
-// Please refer to https://grpc.io/docs/guides/wire.html for more information about custom-metadata.
+// Please refer to https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md
+// for more information about custom-metadata.
 package metadata // import "google.golang.org/grpc/metadata"
 
 import (
@@ -115,9 +116,22 @@ func NewIncomingContext(ctx context.Context, md MD) context.Context {
 	return context.WithValue(ctx, mdIncomingKey{}, md)
 }
 
-// NewOutgoingContext creates a new context with outgoing md attached.
+// NewOutgoingContext creates a new context with outgoing md attached. If used
+// in conjunction with AppendToOutgoingContext, NewOutgoingContext will
+// overwrite any previously-appended metadata.
 func NewOutgoingContext(ctx context.Context, md MD) context.Context {
-	return context.WithValue(ctx, mdOutgoingKey{}, md)
+	return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md})
+}
+
+// AppendToOutgoingContext returns a new context with the provided kv merged
+// with any existing metadata in the context. Please refer to the
+// documentation of Pairs for a description of kv.
+func AppendToOutgoingContext(ctx context.Context, kv ...string) context.Context {
+	if len(kv)%2 == 1 {
+		panic(fmt.Sprintf("metadata: AppendToOutgoingContext got an odd number of input pairs for metadata: %d", len(kv)))
+	}
+	md, _ := ctx.Value(mdOutgoingKey{}).(rawMD)
+	return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md.md, added: append(md.added, kv)})
 }
 
 // FromIncomingContext returns the incoming metadata in ctx if it exists.  The
@@ -128,10 +142,39 @@ func FromIncomingContext(ctx context.Context) (md MD, ok bool) {
 	return
 }
 
+// FromOutgoingContextRaw returns the un-merged, intermediary contents
+// of rawMD. Remember to perform strings.ToLower on the keys. The returned
+// MD should not be modified. Writing to it may cause races. Modification
+// should be made to copies of the returned MD.
+//
+// This is intended for gRPC-internal use ONLY.
+func FromOutgoingContextRaw(ctx context.Context) (MD, [][]string, bool) {
+	raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
+	if !ok {
+		return nil, nil, false
+	}
+
+	return raw.md, raw.added, true
+}
+
 // FromOutgoingContext returns the outgoing metadata in ctx if it exists.  The
 // returned MD should not be modified. Writing to it may cause races.
 // Modification should be made to the copies of the returned MD.
-func FromOutgoingContext(ctx context.Context) (md MD, ok bool) {
+func FromOutgoingContext(ctx context.Context) (MD, bool) {
-	md, ok = ctx.Value(mdOutgoingKey{}).(MD)
+	raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
-	return
+	if !ok {
+		return nil, false
+	}
+
+	mds := make([]MD, 0, len(raw.added)+1)
+	mds = append(mds, raw.md)
+	for _, vv := range raw.added {
+		mds = append(mds, Pairs(vv...))
+	}
+	return Join(mds...), ok
+}
+
+type rawMD struct {
+	md    MD
+	added [][]string
 }

vendor/google.golang.org/grpc/naming/go17.go

@@ -1,4 +1,4 @@
-// +build go1.7, !go1.8
+// +build go1.6,!go1.8
 
 /*
  *

vendor/google.golang.org/grpc/picker_wrapper.go

@@ -97,7 +97,7 @@ func (bp *pickerWrapper) pick(ctx context.Context, failfast bool, opts balancer.
 		p = bp.picker
 		bp.mu.Unlock()
 
-		subConn, put, err := p.Pick(ctx, opts)
+		subConn, done, err := p.Pick(ctx, opts)
 
 		if err != nil {
 			switch err {
@@ -120,7 +120,7 @@ func (bp *pickerWrapper) pick(ctx context.Context, failfast bool, opts balancer.
 			continue
 		}
 		if t, ok := acw.getAddrConn().getReadyTransport(); ok {
-			return t, put, nil
+			return t, done, nil
 		}
 		grpclog.Infof("blockingPicker: the picked transport is not ready, loop back to repick")
 		// If ok == false, ac.state is not READY.

vendor/google.golang.org/grpc/pickfirst.go

@@ -26,6 +26,9 @@ import (
 	"google.golang.org/grpc/resolver"
 )
 
+// PickFirstBalancerName is the name of the pick_first balancer.
+const PickFirstBalancerName = "pick_first"
+
 func newPickfirstBuilder() balancer.Builder {
 	return &pickfirstBuilder{}
 }
@@ -37,7 +40,7 @@ func (*pickfirstBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions
 }
 
 func (*pickfirstBuilder) Name() string {
-	return "pickfirst"
+	return PickFirstBalancerName
 }
 
 type pickfirstBalancer struct {
@@ -57,14 +60,20 @@ func (b *pickfirstBalancer) HandleResolvedAddrs(addrs []resolver.Address, err er
 			return
 		}
 		b.cc.UpdateBalancerState(connectivity.Idle, &picker{sc: b.sc})
+		b.sc.Connect()
 	} else {
 		b.sc.UpdateAddresses(addrs)
+		b.sc.Connect()
 	}
 }
 
 func (b *pickfirstBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
 	grpclog.Infof("pickfirstBalancer: HandleSubConnStateChange: %p, %v", sc, s)
-	if b.sc != sc || s == connectivity.Shutdown {
+	if b.sc != sc {
+		grpclog.Infof("pickfirstBalancer: ignored state change because sc is not recognized")
+		return
+	}
+	if s == connectivity.Shutdown {
 		b.sc = nil
 		return
 	}
@@ -93,3 +102,7 @@ func (p *picker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.
 	}
 	return p.sc, nil, nil
 }
+
+func init() {
+	balancer.Register(newPickfirstBuilder())
+}

vendor/google.golang.org/grpc/proxy.go

@@ -82,8 +82,7 @@ func doHTTPConnectHandshake(ctx context.Context, conn net.Conn, addr string) (_
 		Header: map[string][]string{"User-Agent": {grpcUA}},
 	})
 
-	req = req.WithContext(ctx)
+	if err := sendHTTPRequest(ctx, req, conn); err != nil {
-	if err := req.Write(conn); err != nil {
 		return nil, fmt.Errorf("failed to write the HTTP request: %v", err)
 	}
 

vendor/google.golang.org/grpc/resolver/dns/dns_resolver.go

@@ -0,0 +1,377 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package dns implements a dns resolver to be installed as the default resolver
+// in grpc.
+package dns
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"math/rand"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/resolver"
+)
+
+func init() {
+	resolver.Register(NewBuilder())
+}
+
+const (
+	defaultPort = "443"
+	defaultFreq = time.Minute * 30
+	golang      = "GO"
+	// In DNS, service config is encoded in a TXT record via the mechanism
+	// described in RFC-1464 using the attribute name grpc_config.
+	txtAttribute = "grpc_config="
+)
+
+var errMissingAddr = errors.New("missing address")
+
+// NewBuilder creates a dnsBuilder which is used to factory DNS resolvers.
+func NewBuilder() resolver.Builder {
+	return &dnsBuilder{freq: defaultFreq}
+}
+
+type dnsBuilder struct {
+	// frequency of polling the DNS server.
+	freq time.Duration
+}
+
+// Build creates and starts a DNS resolver that watches the name resolution of the target.
+func (b *dnsBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
+	host, port, err := parseTarget(target.Endpoint)
+	if err != nil {
+		return nil, err
+	}
+
+	// IP address.
+	if net.ParseIP(host) != nil {
+		host, _ = formatIP(host)
+		addr := []resolver.Address{{Addr: host + ":" + port}}
+		i := &ipResolver{
+			cc: cc,
+			ip: addr,
+			rn: make(chan struct{}, 1),
+			q:  make(chan struct{}),
+		}
+		cc.NewAddress(addr)
+		go i.watcher()
+		return i, nil
+	}
+
+	// DNS address (non-IP).
+	ctx, cancel := context.WithCancel(context.Background())
+	d := &dnsResolver{
+		freq:   b.freq,
+		host:   host,
+		port:   port,
+		ctx:    ctx,
+		cancel: cancel,
+		cc:     cc,
+		t:      time.NewTimer(0),
+		rn:     make(chan struct{}, 1),
+	}
+
+	d.wg.Add(1)
+	go d.watcher()
+	return d, nil
+}
+
+// Scheme returns the naming scheme of this resolver builder, which is "dns".
+func (b *dnsBuilder) Scheme() string {
+	return "dns"
+}
+
+// ipResolver watches for the name resolution update for an IP address.
+type ipResolver struct {
+	cc resolver.ClientConn
+	ip []resolver.Address
+	// rn channel is used by ResolveNow() to force an immediate resolution of the target.
+	rn chan struct{}
+	q  chan struct{}
+}
+
+// ResolveNow resend the address it stores, no resolution is needed.
+func (i *ipResolver) ResolveNow(opt resolver.ResolveNowOption) {
+	select {
+	case i.rn <- struct{}{}:
+	default:
+	}
+}
+
+// Close closes the ipResolver.
+func (i *ipResolver) Close() {
+	close(i.q)
+}
+
+func (i *ipResolver) watcher() {
+	for {
+		select {
+		case <-i.rn:
+			i.cc.NewAddress(i.ip)
+		case <-i.q:
+			return
+		}
+	}
+}
+
+// dnsResolver watches for the name resolution update for a non-IP target.
+type dnsResolver struct {
+	freq   time.Duration
+	host   string
+	port   string
+	ctx    context.Context
+	cancel context.CancelFunc
+	cc     resolver.ClientConn
+	// rn channel is used by ResolveNow() to force an immediate resolution of the target.
+	rn chan struct{}
+	t  *time.Timer
+	// wg is used to enforce Close() to return after the watcher() goroutine has finished.
+	// Otherwise, data race will be possible. [Race Example] in dns_resolver_test we
+	// replace the real lookup functions with mocked ones to facilitate testing.
+	// If Close() doesn't wait for watcher() goroutine finishes, race detector sometimes
+	// will warns lookup (READ the lookup function pointers) inside watcher() goroutine
+	// has data race with replaceNetFunc (WRITE the lookup function pointers).
+	wg sync.WaitGroup
+}
+
+// ResolveNow invoke an immediate resolution of the target that this dnsResolver watches.
+func (d *dnsResolver) ResolveNow(opt resolver.ResolveNowOption) {
+	select {
+	case d.rn <- struct{}{}:
+	default:
+	}
+}
+
+// Close closes the dnsResolver.
+func (d *dnsResolver) Close() {
+	d.cancel()
+	d.wg.Wait()
+	d.t.Stop()
+}
+
+func (d *dnsResolver) watcher() {
+	defer d.wg.Done()
+	for {
+		select {
+		case <-d.ctx.Done():
+			return
+		case <-d.t.C:
+		case <-d.rn:
+		}
+		result, sc := d.lookup()
+		// Next lookup should happen after an interval defined by d.freq.
+		d.t.Reset(d.freq)
+		d.cc.NewServiceConfig(string(sc))
+		d.cc.NewAddress(result)
+	}
+}
+
+func (d *dnsResolver) lookupSRV() []resolver.Address {
+	var newAddrs []resolver.Address
+	_, srvs, err := lookupSRV(d.ctx, "grpclb", "tcp", d.host)
+	if err != nil {
+		grpclog.Infof("grpc: failed dns SRV record lookup due to %v.\n", err)
+		return nil
+	}
+	for _, s := range srvs {
+		lbAddrs, err := lookupHost(d.ctx, s.Target)
+		if err != nil {
+			grpclog.Warningf("grpc: failed load banlacer address dns lookup due to %v.\n", err)
+			continue
+		}
+		for _, a := range lbAddrs {
+			a, ok := formatIP(a)
+			if !ok {
+				grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
+				continue
+			}
+			addr := a + ":" + strconv.Itoa(int(s.Port))
+			newAddrs = append(newAddrs, resolver.Address{Addr: addr, Type: resolver.GRPCLB, ServerName: s.Target})
+		}
+	}
+	return newAddrs
+}
+
+func (d *dnsResolver) lookupTXT() string {
+	ss, err := lookupTXT(d.ctx, d.host)
+	if err != nil {
+		grpclog.Warningf("grpc: failed dns TXT record lookup due to %v.\n", err)
+		return ""
+	}
+	var res string
+	for _, s := range ss {
+		res += s
+	}
+
+	// TXT record must have "grpc_config=" attribute in order to be used as service config.
+	if !strings.HasPrefix(res, txtAttribute) {
+		grpclog.Warningf("grpc: TXT record %v missing %v attribute", res, txtAttribute)
+		return ""
+	}
+	return strings.TrimPrefix(res, txtAttribute)
+}
+
+func (d *dnsResolver) lookupHost() []resolver.Address {
+	var newAddrs []resolver.Address
+	addrs, err := lookupHost(d.ctx, d.host)
+	if err != nil {
+		grpclog.Warningf("grpc: failed dns A record lookup due to %v.\n", err)
+		return nil
+	}
+	for _, a := range addrs {
+		a, ok := formatIP(a)
+		if !ok {
+			grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
+			continue
+		}
+		addr := a + ":" + d.port
+		newAddrs = append(newAddrs, resolver.Address{Addr: addr})
+	}
+	return newAddrs
+}
+
+func (d *dnsResolver) lookup() ([]resolver.Address, string) {
+	var newAddrs []resolver.Address
+	newAddrs = d.lookupSRV()
+	// Support fallback to non-balancer address.
+	newAddrs = append(newAddrs, d.lookupHost()...)
+	sc := d.lookupTXT()
+	return newAddrs, canaryingSC(sc)
+}
+
+// formatIP returns ok = false if addr is not a valid textual representation of an IP address.
+// If addr is an IPv4 address, return the addr and ok = true.
+// If addr is an IPv6 address, return the addr enclosed in square brackets and ok = true.
+func formatIP(addr string) (addrIP string, ok bool) {
+	ip := net.ParseIP(addr)
+	if ip == nil {
+		return "", false
+	}
+	if ip.To4() != nil {
+		return addr, true
+	}
+	return "[" + addr + "]", true
+}
+
+// parseTarget takes the user input target string, returns formatted host and port info.
+// If target doesn't specify a port, set the port to be the defaultPort.
+// If target is in IPv6 format and host-name is enclosed in sqarue brackets, brackets
+// are strippd when setting the host.
+// examples:
+// target: "www.google.com" returns host: "www.google.com", port: "443"
+// target: "ipv4-host:80" returns host: "ipv4-host", port: "80"
+// target: "[ipv6-host]" returns host: "ipv6-host", port: "443"
+// target: ":80" returns host: "localhost", port: "80"
+// target: ":" returns host: "localhost", port: "443"
+func parseTarget(target string) (host, port string, err error) {
+	if target == "" {
+		return "", "", errMissingAddr
+	}
+	if ip := net.ParseIP(target); ip != nil {
+		// target is an IPv4 or IPv6(without brackets) address
+		return target, defaultPort, nil
+	}
+	if host, port, err = net.SplitHostPort(target); err == nil {
+		// target has port, i.e ipv4-host:port, [ipv6-host]:port, host-name:port
+		if host == "" {
+			// Keep consistent with net.Dial(): If the host is empty, as in ":80", the local system is assumed.
+			host = "localhost"
+		}
+		if port == "" {
+			// If the port field is empty(target ends with colon), e.g. "[::1]:", defaultPort is used.
+			port = defaultPort
+		}
+		return host, port, nil
+	}
+	if host, port, err = net.SplitHostPort(target + ":" + defaultPort); err == nil {
+		// target doesn't have port
+		return host, port, nil
+	}
+	return "", "", fmt.Errorf("invalid target address %v, error info: %v", target, err)
+}
+
+type rawChoice struct {
+	ClientLanguage *[]string        `json:"clientLanguage,omitempty"`
+	Percentage     *int             `json:"percentage,omitempty"`
+	ClientHostName *[]string        `json:"clientHostName,omitempty"`
+	ServiceConfig  *json.RawMessage `json:"serviceConfig,omitempty"`
+}
+
+func containsString(a *[]string, b string) bool {
+	if a == nil {
+		return true
+	}
+	for _, c := range *a {
+		if c == b {
+			return true
+		}
+	}
+	return false
+}
+
+func chosenByPercentage(a *int) bool {
+	if a == nil {
+		return true
+	}
+	s := rand.NewSource(time.Now().UnixNano())
+	r := rand.New(s)
+	if r.Intn(100)+1 > *a {
+		return false
+	}
+	return true
+}
+
+func canaryingSC(js string) string {
+	if js == "" {
+		return ""
+	}
+	var rcs []rawChoice
+	err := json.Unmarshal([]byte(js), &rcs)
+	if err != nil {
+		grpclog.Warningf("grpc: failed to parse service config json string due to %v.\n", err)
+		return ""
+	}
+	cliHostname, err := os.Hostname()
+	if err != nil {
+		grpclog.Warningf("grpc: failed to get client hostname due to %v.\n", err)
+		return ""
+	}
+	var sc string
+	for _, c := range rcs {
+		if !containsString(c.ClientLanguage, golang) ||
+			!chosenByPercentage(c.Percentage) ||
+			!containsString(c.ClientHostName, cliHostname) ||
+			c.ServiceConfig == nil {
+			continue
+		}
+		sc = string(*c.ServiceConfig)
+		break
+	}
+	return sc
+}

vendor/google.golang.org/grpc/resolver/dns/go17.go

@@ -0,0 +1,35 @@
+// +build go1.6, !go1.8
+
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package dns
+
+import (
+	"net"
+
+	"golang.org/x/net/context"
+)
+
+var (
+	lookupHost = func(ctx context.Context, host string) ([]string, error) { return net.LookupHost(host) }
+	lookupSRV  = func(ctx context.Context, service, proto, name string) (string, []*net.SRV, error) {
+		return net.LookupSRV(service, proto, name)
+	}
+	lookupTXT = func(ctx context.Context, name string) ([]string, error) { return net.LookupTXT(name) }
+)

vendor/google.golang.org/grpc/resolver/dns/go18.go

@@ -0,0 +1,29 @@
+// +build go1.8
+
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package dns
+
+import "net"
+
+var (
+	lookupHost = net.DefaultResolver.LookupHost
+	lookupSRV  = net.DefaultResolver.LookupSRV
+	lookupTXT  = net.DefaultResolver.LookupTXT
+)

vendor/google.golang.org/grpc/resolver/passthrough/passthrough.go

@@ -0,0 +1,57 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package passthrough implements a pass-through resolver. It sends the target
+// name without scheme back to gRPC as resolved address.
+package passthrough
+
+import "google.golang.org/grpc/resolver"
+
+const scheme = "passthrough"
+
+type passthroughBuilder struct{}
+
+func (*passthroughBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
+	r := &passthroughResolver{
+		target: target,
+		cc:     cc,
+	}
+	r.start()
+	return r, nil
+}
+
+func (*passthroughBuilder) Scheme() string {
+	return scheme
+}
+
+type passthroughResolver struct {
+	target resolver.Target
+	cc     resolver.ClientConn
+}
+
+func (r *passthroughResolver) start() {
+	r.cc.NewAddress([]resolver.Address{{Addr: r.target.Endpoint}})
+}
+
+func (*passthroughResolver) ResolveNow(o resolver.ResolveNowOption) {}
+
+func (*passthroughResolver) Close() {}
+
+func init() {
+	resolver.Register(&passthroughBuilder{})
+}

vendor/google.golang.org/grpc/resolver/resolver.go

@@ -24,7 +24,7 @@ var (
 	// m is a map from scheme to resolver builder.
 	m = make(map[string]Builder)
 	// defaultScheme is the default scheme to use.
-	defaultScheme string
+	defaultScheme = "passthrough"
 )
 
 // TODO(bar) install dns resolver in init(){}.
@@ -36,30 +36,26 @@ func Register(b Builder) {
 }
 
 // Get returns the resolver builder registered with the given scheme.
-// If no builder is register with the scheme, the default scheme will
+//
-// be used.
+// If no builder is register with the scheme, nil will be returned.
-// If the default scheme is not modified, "dns" will be the default
-// scheme, and the preinstalled dns resolver will be used.
-// If the default scheme is modified, and a resolver is registered with
-// the scheme, that resolver will be returned.
-// If the default scheme is modified, and no resolver is registered with
-// the scheme, nil will be returned.
 func Get(scheme string) Builder {
 	if b, ok := m[scheme]; ok {
 		return b
 	}
-	if b, ok := m[defaultScheme]; ok {
-		return b
-	}
 	return nil
 }
 
 // SetDefaultScheme sets the default scheme that will be used.
-// The default default scheme is "dns".
+// The default default scheme is "passthrough".
 func SetDefaultScheme(scheme string) {
 	defaultScheme = scheme
 }
 
+// GetDefaultScheme gets the default scheme that will be used.
+func GetDefaultScheme() string {
+	return defaultScheme
+}
+
 // AddressType indicates the address type returned by name resolution.
 type AddressType uint8
 
@@ -78,7 +74,9 @@ type Address struct {
 	// Type is the type of this address.
 	Type AddressType
 	// ServerName is the name of this address.
-	// It's the name of the grpc load balancer, which will be used for authentication.
+	//
+	// e.g. if Type is GRPCLB, ServerName should be the name of the remote load
+	// balancer, not the name of the backend.
 	ServerName string
 	// Metadata is the information associated with Addr, which may be used
 	// to make load balancing decision.
@@ -92,6 +90,11 @@ type BuildOption struct {
 
 // ClientConn contains the callbacks for resolver to notify any updates
 // to the gRPC ClientConn.
+//
+// This interface is to be implemented by gRPC. Users should not need a
+// brand new implementation of this interface. For the situations like
+// testing, the new implementation should embed this interface. This allows
+// gRPC to add new methods to this interface.
 type ClientConn interface {
 	// NewAddress is called by resolver to notify ClientConn a new list
 	// of resolved addresses.
@@ -128,8 +131,10 @@ type ResolveNowOption struct{}
 // Resolver watches for the updates on the specified target.
 // Updates include address updates and service config updates.
 type Resolver interface {
-	// ResolveNow will be called by gRPC to try to resolve the target name again.
+	// ResolveNow will be called by gRPC to try to resolve the target name
-	// It's just a hint, resolver can ignore this if it's not necessary.
+	// again. It's just a hint, resolver can ignore this if it's not necessary.
+	//
+	// It could be called multiple times concurrently.
 	ResolveNow(ResolveNowOption)
 	// Close closes the resolver.
 	Close()

vendor/google.golang.org/grpc/resolver_conn_wrapper.go

@@ -19,6 +19,7 @@
 package grpc
 
 import (
+	"fmt"
 	"strings"
 
 	"google.golang.org/grpc/grpclog"
@@ -36,20 +37,27 @@ type ccResolverWrapper struct {
 }
 
 // split2 returns the values from strings.SplitN(s, sep, 2).
-// If sep is not found, it returns "", s instead.
+// If sep is not found, it returns ("", s, false) instead.
-func split2(s, sep string) (string, string) {
+func split2(s, sep string) (string, string, bool) {
 	spl := strings.SplitN(s, sep, 2)
 	if len(spl) < 2 {
-		return "", s
+		return "", "", false
 	}
-	return spl[0], spl[1]
+	return spl[0], spl[1], true
 }
 
 // parseTarget splits target into a struct containing scheme, authority and
 // endpoint.
+//
+// If target is not a valid scheme://authority/endpoint, it returns {Endpoint:
+// target}.
 func parseTarget(target string) (ret resolver.Target) {
-	ret.Scheme, ret.Endpoint = split2(target, "://")
+	var ok bool
-	ret.Authority, ret.Endpoint = split2(ret.Endpoint, "/")
+	ret.Scheme, ret.Endpoint, ok = split2(target, "://")
+	if !ok {
+		return resolver.Target{Endpoint: target}
+	}
+	ret.Authority, ret.Endpoint, _ = split2(ret.Endpoint, "/")
 	return ret
 }
 
@@ -57,18 +65,12 @@ func parseTarget(target string) (ret resolver.Target) {
 // builder for this scheme. It then builds the resolver and starts the
 // monitoring goroutine for it.
 //
-// This function could return nil, nil, in tests for old behaviors.
+// If withResolverBuilder dial option is set, the specified resolver will be
-// TODO(bar) never return nil, nil when DNS becomes the default resolver.
+// used instead.
 func newCCResolverWrapper(cc *ClientConn) (*ccResolverWrapper, error) {
-	target := parseTarget(cc.target)
+	rb := cc.dopts.resolverBuilder
-	grpclog.Infof("dialing to target with scheme: %q", target.Scheme)
-
-	rb := resolver.Get(target.Scheme)
 	if rb == nil {
-		// TODO(bar) return error when DNS becomes the default (implemented and
+		return nil, fmt.Errorf("could not get resolver for scheme: %q", cc.parsedTarget.Scheme)
-		// registered by DNS package).
-		grpclog.Infof("could not get resolver for scheme: %q", target.Scheme)
-		return nil, nil
 	}
 
 	ccr := &ccResolverWrapper{
@@ -79,14 +81,17 @@ func newCCResolverWrapper(cc *ClientConn) (*ccResolverWrapper, error) {
 	}
 
 	var err error
-	ccr.resolver, err = rb.Build(target, ccr, resolver.BuildOption{})
+	ccr.resolver, err = rb.Build(cc.parsedTarget, ccr, resolver.BuildOption{})
 	if err != nil {
 		return nil, err
 	}
-	go ccr.watcher()
 	return ccr, nil
 }
 
+func (ccr *ccResolverWrapper) start() {
+	go ccr.watcher()
+}
+
 // watcher processes address updates and service config updates sequencially.
 // Otherwise, we need to resolve possible races between address and service
 // config (e.g. they specify different balancer types).
@@ -100,20 +105,31 @@ func (ccr *ccResolverWrapper) watcher() {
 
 		select {
 		case addrs := <-ccr.addrCh:
-			grpclog.Infof("ccResolverWrapper: sending new addresses to balancer wrapper: %v", addrs)
+			select {
-			// TODO(bar switching) this should never be nil. Pickfirst should be default.
+			case <-ccr.done:
-			if ccr.cc.balancerWrapper != nil {
+				return
-				// TODO(bar switching) create balancer if it's nil?
+			default:
-				ccr.cc.balancerWrapper.handleResolvedAddrs(addrs, nil)
 			}
+			grpclog.Infof("ccResolverWrapper: sending new addresses to cc: %v", addrs)
+			ccr.cc.handleResolvedAddrs(addrs, nil)
 		case sc := <-ccr.scCh:
+			select {
+			case <-ccr.done:
+				return
+			default:
+			}
 			grpclog.Infof("ccResolverWrapper: got new service config: %v", sc)
+			ccr.cc.handleServiceConfig(sc)
 		case <-ccr.done:
 			return
 		}
 	}
 }
 
+func (ccr *ccResolverWrapper) resolveNow(o resolver.ResolveNowOption) {
+	ccr.resolver.ResolveNow(o)
+}
+
 func (ccr *ccResolverWrapper) close() {
 	ccr.resolver.Close()
 	close(ccr.done)

vendor/google.golang.org/grpc/rpc_util.go

@@ -21,18 +21,19 @@ package grpc
 import (
 	"bytes"
 	"compress/gzip"
-	stdctx "context"
 	"encoding/binary"
 	"io"
 	"io/ioutil"
 	"math"
-	"os"
+	"strings"
 	"sync"
 	"time"
 
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/encoding"
+	"google.golang.org/grpc/encoding/proto"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/peer"
 	"google.golang.org/grpc/stats"
@@ -124,14 +125,15 @@ func (d *gzipDecompressor) Type() string {
 
 // callInfo contains all related configuration and information about an RPC.
 type callInfo struct {
+	compressorType        string
 	failFast              bool
-	headerMD              metadata.MD
+	stream                *transport.Stream
-	trailerMD             metadata.MD
-	peer                  *peer.Peer
 	traceInfo             traceInfo // in trace.go
 	maxReceiveMessageSize *int
 	maxSendMessageSize    *int
 	creds                 credentials.PerRPCCredentials
+	contentSubtype        string
+	codec                 baseCodec
 }
 
 func defaultCallInfo() *callInfo {
@@ -172,7 +174,9 @@ func (o afterCall) after(c *callInfo)        { o(c) }
 // for a unary RPC.
 func Header(md *metadata.MD) CallOption {
 	return afterCall(func(c *callInfo) {
-		*md = c.headerMD
+		if c.stream != nil {
+			*md, _ = c.stream.Header()
+		}
 	})
 }
 
@@ -180,27 +184,34 @@ func Header(md *metadata.MD) CallOption {
 // for a unary RPC.
 func Trailer(md *metadata.MD) CallOption {
 	return afterCall(func(c *callInfo) {
-		*md = c.trailerMD
+		if c.stream != nil {
+			*md = c.stream.Trailer()
+		}
 	})
 }
 
 // Peer returns a CallOption that retrieves peer information for a
 // unary RPC.
-func Peer(peer *peer.Peer) CallOption {
+func Peer(p *peer.Peer) CallOption {
 	return afterCall(func(c *callInfo) {
-		if c.peer != nil {
+		if c.stream != nil {
-			*peer = *c.peer
+			if x, ok := peer.FromContext(c.stream.Context()); ok {
+				*p = *x
+			}
 		}
 	})
 }
 
 // FailFast configures the action to take when an RPC is attempted on broken
-// connections or unreachable servers. If failfast is true, the RPC will fail
+// connections or unreachable servers.  If failFast is true, the RPC will fail
 // immediately. Otherwise, the RPC client will block the call until a
-// connection is available (or the call is canceled or times out) and will retry
+// connection is available (or the call is canceled or times out) and will
-// the call if it fails due to a transient error. Please refer to
+// retry the call if it fails due to a transient error.  gRPC will not retry if
+// data was written to the wire unless the server indicates it did not process
+// the data.  Please refer to
 // https://github.com/grpc/grpc/blob/master/doc/wait-for-ready.md.
-// Note: failFast is default to true.
+//
+// By default, RPCs are "Fail Fast".
 func FailFast(failFast bool) CallOption {
 	return beforeCall(func(c *callInfo) error {
 		c.failFast = failFast
@@ -233,6 +244,61 @@ func PerRPCCredentials(creds credentials.PerRPCCredentials) CallOption {
 	})
 }
 
+// UseCompressor returns a CallOption which sets the compressor used when
+// sending the request.  If WithCompressor is also set, UseCompressor has
+// higher priority.
+//
+// This API is EXPERIMENTAL.
+func UseCompressor(name string) CallOption {
+	return beforeCall(func(c *callInfo) error {
+		c.compressorType = name
+		return nil
+	})
+}
+
+// CallContentSubtype returns a CallOption that will set the content-subtype
+// for a call. For example, if content-subtype is "json", the Content-Type over
+// the wire will be "application/grpc+json". The content-subtype is converted
+// to lowercase before being included in Content-Type. See Content-Type on
+// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
+// more details.
+//
+// If CallCustomCodec is not also used, the content-subtype will be used to
+// look up the Codec to use in the registry controlled by RegisterCodec. See
+// the documention on RegisterCodec for details on registration. The lookup
+// of content-subtype is case-insensitive. If no such Codec is found, the call
+// will result in an error with code codes.Internal.
+//
+// If CallCustomCodec is also used, that Codec will be used for all request and
+// response messages, with the content-subtype set to the given contentSubtype
+// here for requests.
+func CallContentSubtype(contentSubtype string) CallOption {
+	contentSubtype = strings.ToLower(contentSubtype)
+	return beforeCall(func(c *callInfo) error {
+		c.contentSubtype = contentSubtype
+		return nil
+	})
+}
+
+// CallCustomCodec returns a CallOption that will set the given Codec to be
+// used for all request and response messages for a call. The result of calling
+// String() will be used as the content-subtype in a case-insensitive manner.
+//
+// See Content-Type on
+// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
+// more details. Also see the documentation on RegisterCodec and
+// CallContentSubtype for more details on the interaction between Codec and
+// content-subtype.
+//
+// This function is provided for advanced users; prefer to use only
+// CallContentSubtype to select a registered codec instead.
+func CallCustomCodec(codec Codec) CallOption {
+	return beforeCall(func(c *callInfo) error {
+		c.codec = codec
+		return nil
+	})
+}
+
 // The format of the payload: compressed or not?
 type payloadFormat uint8
 
@@ -248,8 +314,8 @@ type parser struct {
 	// error types.
 	r io.Reader
 
-	// The header of a gRPC message. Find more detail
+	// The header of a gRPC message. Find more detail at
-	// at https://grpc.io/docs/guides/wire.html.
+	// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md
 	header [5]byte
 }
 
@@ -277,8 +343,11 @@ func (p *parser) recvMsg(maxReceiveMessageSize int) (pf payloadFormat, msg []byt
 	if length == 0 {
 		return pf, nil, nil
 	}
-	if length > uint32(maxReceiveMessageSize) {
+	if int64(length) > int64(maxInt) {
-		return 0, nil, Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", length, maxReceiveMessageSize)
+		return 0, nil, status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max length allowed on current machine (%d vs. %d)", length, maxInt)
+	}
+	if int(length) > maxReceiveMessageSize {
+		return 0, nil, status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", length, maxReceiveMessageSize)
 	}
 	// TODO(bradfitz,zhaoq): garbage. reuse buffer after proto decoding instead
 	// of making it for each message:
@@ -294,18 +363,21 @@ func (p *parser) recvMsg(maxReceiveMessageSize int) (pf payloadFormat, msg []byt
 
 // encode serializes msg and returns a buffer of message header and a buffer of msg.
 // If msg is nil, it generates the message header and an empty msg buffer.
-func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer, outPayload *stats.OutPayload) ([]byte, []byte, error) {
+// TODO(ddyihai): eliminate extra Compressor parameter.
-	var b []byte
+func encode(c baseCodec, msg interface{}, cp Compressor, outPayload *stats.OutPayload, compressor encoding.Compressor) ([]byte, []byte, error) {
+	var (
+		b    []byte
+		cbuf *bytes.Buffer
+	)
 	const (
 		payloadLen = 1
 		sizeLen    = 4
 	)
-
 	if msg != nil {
 		var err error
 		b, err = c.Marshal(msg)
 		if err != nil {
-			return nil, nil, Errorf(codes.Internal, "grpc: error while marshaling: %v", err.Error())
+			return nil, nil, status.Errorf(codes.Internal, "grpc: error while marshaling: %v", err.Error())
 		}
 		if outPayload != nil {
 			outPayload.Payload = msg
@@ -313,24 +385,35 @@ func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer, outPayl
 			outPayload.Data = b
 			outPayload.Length = len(b)
 		}
-		if cp != nil {
+		if compressor != nil || cp != nil {
-			if err := cp.Do(cbuf, b); err != nil {
+			cbuf = new(bytes.Buffer)
-				return nil, nil, Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
+			// Has compressor, check Compressor is set by UseCompressor first.
+			if compressor != nil {
+				z, _ := compressor.Compress(cbuf)
+				if _, err := z.Write(b); err != nil {
+					return nil, nil, status.Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
+				}
+				z.Close()
+			} else {
+				// If Compressor is not set by UseCompressor, use default Compressor
+				if err := cp.Do(cbuf, b); err != nil {
+					return nil, nil, status.Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
+				}
 			}
 			b = cbuf.Bytes()
 		}
 	}
-
 	if uint(len(b)) > math.MaxUint32 {
-		return nil, nil, Errorf(codes.ResourceExhausted, "grpc: message too large (%d bytes)", len(b))
+		return nil, nil, status.Errorf(codes.ResourceExhausted, "grpc: message too large (%d bytes)", len(b))
 	}
 
 	bufHeader := make([]byte, payloadLen+sizeLen)
-	if cp == nil {
+	if compressor != nil || cp != nil {
-		bufHeader[0] = byte(compressionNone)
-	} else {
 		bufHeader[0] = byte(compressionMade)
+	} else {
+		bufHeader[0] = byte(compressionNone)
 	}
+
 	// Write length of b into buf
 	binary.BigEndian.PutUint32(bufHeader[payloadLen:], uint32(len(b)))
 	if outPayload != nil {
@@ -339,20 +422,26 @@ func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer, outPayl
 	return bufHeader, b, nil
 }
 
-func checkRecvPayload(pf payloadFormat, recvCompress string, dc Decompressor) error {
+func checkRecvPayload(pf payloadFormat, recvCompress string, haveCompressor bool) *status.Status {
 	switch pf {
 	case compressionNone:
 	case compressionMade:
-		if dc == nil || recvCompress != dc.Type() {
+		if recvCompress == "" || recvCompress == encoding.Identity {
-			return Errorf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress)
+			return status.New(codes.Internal, "grpc: compressed flag set with identity or empty encoding")
+		}
+		if !haveCompressor {
+			return status.Newf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress)
 		}
 	default:
-		return Errorf(codes.Internal, "grpc: received unexpected payload format %d", pf)
+		return status.Newf(codes.Internal, "grpc: received unexpected payload format %d", pf)
 	}
 	return nil
 }
 
-func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{}, maxReceiveMessageSize int, inPayload *stats.InPayload) error {
+// For the two compressor parameters, both should not be set, but if they are,
+// dc takes precedence over compressor.
+// TODO(dfawley): wrap the old compressor/decompressor using the new API?
+func recv(p *parser, c baseCodec, s *transport.Stream, dc Decompressor, m interface{}, maxReceiveMessageSize int, inPayload *stats.InPayload, compressor encoding.Compressor) error {
 	pf, d, err := p.recvMsg(maxReceiveMessageSize)
 	if err != nil {
 		return err
@@ -360,22 +449,37 @@ func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{
 	if inPayload != nil {
 		inPayload.WireLength = len(d)
 	}
-	if err := checkRecvPayload(pf, s.RecvCompress(), dc); err != nil {
+
-		return err
+	if st := checkRecvPayload(pf, s.RecvCompress(), compressor != nil || dc != nil); st != nil {
+		return st.Err()
 	}
+
 	if pf == compressionMade {
-		d, err = dc.Do(bytes.NewReader(d))
+		// To match legacy behavior, if the decompressor is set by WithDecompressor or RPCDecompressor,
-		if err != nil {
+		// use this decompressor as the default.
-			return Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
+		if dc != nil {
+			d, err = dc.Do(bytes.NewReader(d))
+			if err != nil {
+				return status.Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
+			}
+		} else {
+			dcReader, err := compressor.Decompress(bytes.NewReader(d))
+			if err != nil {
+				return status.Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
+			}
+			d, err = ioutil.ReadAll(dcReader)
+			if err != nil {
+				return status.Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
+			}
 		}
 	}
 	if len(d) > maxReceiveMessageSize {
 		// TODO: Revisit the error code. Currently keep it consistent with java
 		// implementation.
-		return Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", len(d), maxReceiveMessageSize)
+		return status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", len(d), maxReceiveMessageSize)
 	}
 	if err := c.Unmarshal(d, m); err != nil {
-		return Errorf(codes.Internal, "grpc: failed to unmarshal the received message %v", err)
+		return status.Errorf(codes.Internal, "grpc: failed to unmarshal the received message %v", err)
 	}
 	if inPayload != nil {
 		inPayload.RecvTime = time.Now()
@@ -388,9 +492,7 @@ func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{
 }
 
 type rpcInfo struct {
-	failfast      bool
+	failfast bool
-	bytesSent     bool
-	bytesReceived bool
 }
 
 type rpcInfoContextKey struct{}
@@ -404,69 +506,10 @@ func rpcInfoFromContext(ctx context.Context) (s *rpcInfo, ok bool) {
 	return
 }
 
-func updateRPCInfoInContext(ctx context.Context, s rpcInfo) {
-	if ss, ok := rpcInfoFromContext(ctx); ok {
-		ss.bytesReceived = s.bytesReceived
-		ss.bytesSent = s.bytesSent
-	}
-	return
-}
-
-// toRPCErr converts an error into an error from the status package.
-func toRPCErr(err error) error {
-	if _, ok := status.FromError(err); ok {
-		return err
-	}
-	switch e := err.(type) {
-	case transport.StreamError:
-		return status.Error(e.Code, e.Desc)
-	case transport.ConnectionError:
-		return status.Error(codes.Unavailable, e.Desc)
-	default:
-		switch err {
-		case context.DeadlineExceeded, stdctx.DeadlineExceeded:
-			return status.Error(codes.DeadlineExceeded, err.Error())
-		case context.Canceled, stdctx.Canceled:
-			return status.Error(codes.Canceled, err.Error())
-		case ErrClientConnClosing:
-			return status.Error(codes.FailedPrecondition, err.Error())
-		}
-	}
-	return status.Error(codes.Unknown, err.Error())
-}
-
-// convertCode converts a standard Go error into its canonical code. Note that
-// this is only used to translate the error returned by the server applications.
-func convertCode(err error) codes.Code {
-	switch err {
-	case nil:
-		return codes.OK
-	case io.EOF:
-		return codes.OutOfRange
-	case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
-		return codes.FailedPrecondition
-	case os.ErrInvalid:
-		return codes.InvalidArgument
-	case context.Canceled, stdctx.Canceled:
-		return codes.Canceled
-	case context.DeadlineExceeded, stdctx.DeadlineExceeded:
-		return codes.DeadlineExceeded
-	}
-	switch {
-	case os.IsExist(err):
-		return codes.AlreadyExists
-	case os.IsNotExist(err):
-		return codes.NotFound
-	case os.IsPermission(err):
-		return codes.PermissionDenied
-	}
-	return codes.Unknown
-}
-
 // Code returns the error code for err if it was produced by the rpc system.
 // Otherwise, it returns codes.Unknown.
 //
-// Deprecated; use status.FromError and Code method instead.
+// Deprecated: use status.FromError and Code method instead.
 func Code(err error) codes.Code {
 	if s, ok := status.FromError(err); ok {
 		return s.Code()
@@ -477,7 +520,7 @@ func Code(err error) codes.Code {
 // ErrorDesc returns the error description of err if it was produced by the rpc system.
 // Otherwise, it returns err.Error() or empty string when err is nil.
 //
-// Deprecated; use status.FromError and Message method instead.
+// Deprecated: use status.FromError and Message method instead.
 func ErrorDesc(err error) string {
 	if s, ok := status.FromError(err); ok {
 		return s.Message()
@@ -488,85 +531,47 @@ func ErrorDesc(err error) string {
 // Errorf returns an error containing an error code and a description;
 // Errorf returns nil if c is OK.
 //
-// Deprecated; use status.Errorf instead.
+// Deprecated: use status.Errorf instead.
 func Errorf(c codes.Code, format string, a ...interface{}) error {
 	return status.Errorf(c, format, a...)
 }
 
-// MethodConfig defines the configuration recommended by the service providers for a
+// setCallInfoCodec should only be called after CallOptions have been applied.
-// particular method.
+func setCallInfoCodec(c *callInfo) error {
-// This is EXPERIMENTAL and subject to change.
+	if c.codec != nil {
-type MethodConfig struct {
+		// codec was already set by a CallOption; use it.
-	// WaitForReady indicates whether RPCs sent to this method should wait until
+		return nil
-	// the connection is ready by default (!failfast). The value specified via the
+	}
-	// gRPC client API will override the value set here.
+
-	WaitForReady *bool
+	if c.contentSubtype == "" {
-	// Timeout is the default timeout for RPCs sent to this method. The actual
+		// No codec specified in CallOptions; use proto by default.
-	// deadline used will be the minimum of the value specified here and the value
+		c.codec = encoding.GetCodec(proto.Name)
-	// set by the application via the gRPC client API.  If either one is not set,
+		return nil
-	// then the other will be used.  If neither is set, then the RPC has no deadline.
+	}
-	Timeout *time.Duration
+
-	// MaxReqSize is the maximum allowed payload size for an individual request in a
+	// c.contentSubtype is already lowercased in CallContentSubtype
-	// stream (client->server) in bytes. The size which is measured is the serialized
+	c.codec = encoding.GetCodec(c.contentSubtype)
-	// payload after per-message compression (but before stream compression) in bytes.
+	if c.codec == nil {
-	// The actual value used is the minimum of the value specified here and the value set
+		return status.Errorf(codes.Internal, "no codec registered for content-subtype %s", c.contentSubtype)
-	// by the application via the gRPC client API. If either one is not set, then the other
+	}
-	// will be used.  If neither is set, then the built-in default is used.
+	return nil
-	MaxReqSize *int
-	// MaxRespSize is the maximum allowed payload size for an individual response in a
-	// stream (server->client) in bytes.
-	MaxRespSize *int
 }
 
-// ServiceConfig is provided by the service provider and contains parameters for how
+// The SupportPackageIsVersion variables are referenced from generated protocol
-// clients that connect to the service should behave.
+// buffer files to ensure compatibility with the gRPC version used.  The latest
-// This is EXPERIMENTAL and subject to change.
+// support package version is 5.
-type ServiceConfig struct {
-	// LB is the load balancer the service providers recommends. The balancer specified
-	// via grpc.WithBalancer will override this.
-	LB Balancer
-	// Methods contains a map for the methods in this service.
-	// If there is an exact match for a method (i.e. /service/method) in the map, use the corresponding MethodConfig.
-	// If there's no exact match, look for the default config for the service (/service/) and use the corresponding MethodConfig if it exists.
-	// Otherwise, the method has no MethodConfig to use.
-	Methods map[string]MethodConfig
-}
-
-func min(a, b *int) *int {
-	if *a < *b {
-		return a
-	}
-	return b
-}
-
-func getMaxSize(mcMax, doptMax *int, defaultVal int) *int {
-	if mcMax == nil && doptMax == nil {
-		return &defaultVal
-	}
-	if mcMax != nil && doptMax != nil {
-		return min(mcMax, doptMax)
-	}
-	if mcMax != nil {
-		return mcMax
-	}
-	return doptMax
-}
-
-// SupportPackageIsVersion3 is referenced from generated protocol buffer files.
-// The latest support package version is 4.
-// SupportPackageIsVersion3 is kept for compatibility. It will be removed in the
-// next support package version update.
-const SupportPackageIsVersion3 = true
-
-// SupportPackageIsVersion4 is referenced from generated protocol buffer files
-// to assert that that code is compatible with this version of the grpc package.
 //
-// This constant may be renamed in the future if a change in the generated code
+// Older versions are kept for compatibility. They may be removed if
-// requires a synchronised update of grpc-go and protoc-gen-go. This constant
+// compatibility cannot be maintained.
-// should not be referenced from any other code.
+//
-const SupportPackageIsVersion4 = true
+// These constants should not be referenced from any other code.
+const (
+	SupportPackageIsVersion3 = true
+	SupportPackageIsVersion4 = true
+	SupportPackageIsVersion5 = true
+)
 
 // Version is the current grpc version.
-const Version = "1.7.4"
+const Version = "1.10.1"
 
 const grpcUA = "grpc-go/" + Version

vendor/google.golang.org/grpc/server.go

@@ -32,11 +32,15 @@ import (
 	"sync"
 	"time"
 
+	"io/ioutil"
+
 	"golang.org/x/net/context"
 	"golang.org/x/net/http2"
 	"golang.org/x/net/trace"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/encoding"
+	"google.golang.org/grpc/encoding/proto"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/internal"
 	"google.golang.org/grpc/keepalive"
@@ -89,18 +93,20 @@ type Server struct {
 	conns  map[io.Closer]bool
 	serve  bool
 	drain  bool
-	ctx    context.Context
+	cv     *sync.Cond          // signaled when connections close for GracefulStop
-	cancel context.CancelFunc
-	// A CondVar to let GracefulStop() blocks until all the pending RPCs are finished
-	// and all the transport goes away.
-	cv     *sync.Cond
 	m      map[string]*service // service name -> service info
 	events trace.EventLog
+
+	quit     chan struct{}
+	done     chan struct{}
+	quitOnce sync.Once
+	doneOnce sync.Once
+	serveWG  sync.WaitGroup // counts active Serve goroutines for GracefulStop
 }
 
 type options struct {
 	creds                 credentials.TransportCredentials
-	codec                 Codec
+	codec                 baseCodec
 	cp                    Compressor
 	dc                    Decompressor
 	unaryInt              UnaryServerInterceptor
@@ -177,20 +183,32 @@ func KeepaliveEnforcementPolicy(kep keepalive.EnforcementPolicy) ServerOption {
 }
 
 // CustomCodec returns a ServerOption that sets a codec for message marshaling and unmarshaling.
+//
+// This will override any lookups by content-subtype for Codecs registered with RegisterCodec.
 func CustomCodec(codec Codec) ServerOption {
 	return func(o *options) {
 		o.codec = codec
 	}
 }
 
-// RPCCompressor returns a ServerOption that sets a compressor for outbound messages.
+// RPCCompressor returns a ServerOption that sets a compressor for outbound
+// messages.  For backward compatibility, all outbound messages will be sent
+// using this compressor, regardless of incoming message compression.  By
+// default, server messages will be sent using the same compressor with which
+// request messages were sent.
+//
+// Deprecated: use encoding.RegisterCompressor instead.
 func RPCCompressor(cp Compressor) ServerOption {
 	return func(o *options) {
 		o.cp = cp
 	}
 }
 
-// RPCDecompressor returns a ServerOption that sets a decompressor for inbound messages.
+// RPCDecompressor returns a ServerOption that sets a decompressor for inbound
+// messages.  It has higher priority than decompressors registered via
+// encoding.RegisterCompressor.
+//
+// Deprecated: use encoding.RegisterCompressor instead.
 func RPCDecompressor(dc Decompressor) ServerOption {
 	return func(o *options) {
 		o.dc = dc
@@ -297,6 +315,8 @@ func UnknownServiceHandler(streamHandler StreamHandler) ServerOption {
 // connection establishment (up to and including HTTP/2 handshaking) for all
 // new connections.  If this is not set, the default is 120 seconds.  A zero or
 // negative value will result in an immediate timeout.
+//
+// This API is EXPERIMENTAL.
 func ConnectionTimeout(d time.Duration) ServerOption {
 	return func(o *options) {
 		o.connectionTimeout = d
@@ -310,18 +330,15 @@ func NewServer(opt ...ServerOption) *Server {
 	for _, o := range opt {
 		o(&opts)
 	}
-	if opts.codec == nil {
-		// Set the default codec.
-		opts.codec = protoCodec{}
-	}
 	s := &Server{
 		lis:   make(map[net.Listener]bool),
 		opts:  opts,
 		conns: make(map[io.Closer]bool),
 		m:     make(map[string]*service),
+		quit:  make(chan struct{}),
+		done:  make(chan struct{}),
 	}
 	s.cv = sync.NewCond(&s.mu)
-	s.ctx, s.cancel = context.WithCancel(context.Background())
 	if EnableTracing {
 		_, file, line, _ := runtime.Caller(1)
 		s.events = trace.NewEventLog("grpc.Server", fmt.Sprintf("%s:%d", file, line))
@@ -430,11 +447,9 @@ func (s *Server) GetServiceInfo() map[string]ServiceInfo {
 	return ret
 }
 
-var (
+// ErrServerStopped indicates that the operation is now illegal because of
-	// ErrServerStopped indicates that the operation is now illegal because of
+// the server being stopped.
-	// the server being stopped.
+var ErrServerStopped = errors.New("grpc: the server has been stopped")
-	ErrServerStopped = errors.New("grpc: the server has been stopped")
-)
 
 func (s *Server) useTransportAuthenticator(rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
 	if s.opts.creds == nil {
@@ -448,16 +463,29 @@ func (s *Server) useTransportAuthenticator(rawConn net.Conn) (net.Conn, credenti
 // read gRPC requests and then call the registered handlers to reply to them.
 // Serve returns when lis.Accept fails with fatal errors.  lis will be closed when
 // this method returns.
-// Serve always returns non-nil error.
+// Serve will return a non-nil error unless Stop or GracefulStop is called.
 func (s *Server) Serve(lis net.Listener) error {
 	s.mu.Lock()
 	s.printf("serving")
 	s.serve = true
 	if s.lis == nil {
+		// Serve called after Stop or GracefulStop.
 		s.mu.Unlock()
 		lis.Close()
 		return ErrServerStopped
 	}
+
+	s.serveWG.Add(1)
+	defer func() {
+		s.serveWG.Done()
+		select {
+		// Stop or GracefulStop called; block until done and return nil.
+		case <-s.quit:
+			<-s.done
+		default:
+		}
+	}()
+
 	s.lis[lis] = true
 	s.mu.Unlock()
 	defer func() {
@@ -491,25 +519,39 @@ func (s *Server) Serve(lis net.Listener) error {
 				timer := time.NewTimer(tempDelay)
 				select {
 				case <-timer.C:
-				case <-s.ctx.Done():
+				case <-s.quit:
+					timer.Stop()
+					return nil
 				}
-				timer.Stop()
 				continue
 			}
 			s.mu.Lock()
 			s.printf("done serving; Accept = %v", err)
 			s.mu.Unlock()
+
+			select {
+			case <-s.quit:
+				return nil
+			default:
+			}
 			return err
 		}
 		tempDelay = 0
-		// Start a new goroutine to deal with rawConn
+		// Start a new goroutine to deal with rawConn so we don't stall this Accept
-		// so we don't stall this Accept loop goroutine.
+		// loop goroutine.
-		go s.handleRawConn(rawConn)
+		//
+		// Make sure we account for the goroutine so GracefulStop doesn't nil out
+		// s.conns before this conn can be added.
+		s.serveWG.Add(1)
+		go func() {
+			s.handleRawConn(rawConn)
+			s.serveWG.Done()
+		}()
 	}
 }
 
-// handleRawConn is run in its own goroutine and handles a just-accepted
+// handleRawConn forks a goroutine to handle a just-accepted connection that
-// connection that has not had any I/O performed on it yet.
+// has not had any I/O performed on it yet.
 func (s *Server) handleRawConn(rawConn net.Conn) {
 	rawConn.SetDeadline(time.Now().Add(s.opts.connectionTimeout))
 	conn, authInfo, err := s.useTransportAuthenticator(rawConn)
@@ -534,17 +576,28 @@ func (s *Server) handleRawConn(rawConn net.Conn) {
 	}
 	s.mu.Unlock()
 
+	var serve func()
+	c := conn.(io.Closer)
 	if s.opts.useHandlerImpl {
-		rawConn.SetDeadline(time.Time{})
+		serve = func() { s.serveUsingHandler(conn) }
-		s.serveUsingHandler(conn)
 	} else {
+		// Finish handshaking (HTTP2)
 		st := s.newHTTP2Transport(conn, authInfo)
 		if st == nil {
 			return
 		}
-		rawConn.SetDeadline(time.Time{})
+		c = st
-		s.serveStreams(st)
+		serve = func() { s.serveStreams(st) }
 	}
+
+	rawConn.SetDeadline(time.Time{})
+	if !s.addConn(c) {
+		return
+	}
+	go func() {
+		serve()
+		s.removeConn(c)
+	}()
 }
 
 // newHTTP2Transport sets up a http/2 transport (using the
@@ -571,15 +624,10 @@ func (s *Server) newHTTP2Transport(c net.Conn, authInfo credentials.AuthInfo) tr
 		grpclog.Warningln("grpc: Server.Serve failed to create ServerTransport: ", err)
 		return nil
 	}
-	if !s.addConn(st) {
-		st.Close()
-		return nil
-	}
 	return st
 }
 
 func (s *Server) serveStreams(st transport.ServerTransport) {
-	defer s.removeConn(st)
 	defer st.Close()
 	var wg sync.WaitGroup
 	st.HandleStreams(func(stream *transport.Stream) {
@@ -613,11 +661,6 @@ var _ http.Handler = (*Server)(nil)
 //
 // conn is the *tls.Conn that's already been authenticated.
 func (s *Server) serveUsingHandler(conn net.Conn) {
-	if !s.addConn(conn) {
-		conn.Close()
-		return
-	}
-	defer s.removeConn(conn)
 	h2s := &http2.Server{
 		MaxConcurrentStreams: s.opts.maxConcurrentStreams,
 	}
@@ -651,13 +694,12 @@ func (s *Server) serveUsingHandler(conn net.Conn) {
 // available through grpc-go's HTTP/2 server, and it is currently EXPERIMENTAL
 // and subject to change.
 func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	st, err := transport.NewServerHandlerTransport(w, r)
+	st, err := transport.NewServerHandlerTransport(w, r, s.opts.statsHandler)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 	if !s.addConn(st) {
-		st.Close()
 		return
 	}
 	defer s.removeConn(st)
@@ -687,9 +729,15 @@ func (s *Server) traceInfo(st transport.ServerTransport, stream *transport.Strea
 func (s *Server) addConn(c io.Closer) bool {
 	s.mu.Lock()
 	defer s.mu.Unlock()
-	if s.conns == nil || s.drain {
+	if s.conns == nil {
+		c.Close()
 		return false
 	}
+	if s.drain {
+		// Transport added after we drained our existing conns: drain it
+		// immediately.
+		c.(transport.ServerTransport).Drain()
+	}
 	s.conns[c] = true
 	return true
 }
@@ -703,18 +751,14 @@ func (s *Server) removeConn(c io.Closer) {
 	}
 }
 
-func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Stream, msg interface{}, cp Compressor, opts *transport.Options) error {
+func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Stream, msg interface{}, cp Compressor, opts *transport.Options, comp encoding.Compressor) error {
 	var (
-		cbuf       *bytes.Buffer
 		outPayload *stats.OutPayload
 	)
-	if cp != nil {
-		cbuf = new(bytes.Buffer)
-	}
 	if s.opts.statsHandler != nil {
 		outPayload = &stats.OutPayload{}
 	}
-	hdr, data, err := encode(s.opts.codec, msg, cp, cbuf, outPayload)
+	hdr, data, err := encode(s.getCodec(stream.ContentSubtype()), msg, cp, outPayload, comp)
 	if err != nil {
 		grpclog.Errorln("grpc: server failed to encode response: ", err)
 		return err
@@ -758,10 +802,43 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 			}
 		}()
 	}
-	if s.opts.cp != nil {
+
-		// NOTE: this needs to be ahead of all handling, https://github.com/grpc/grpc-go/issues/686.
+	// comp and cp are used for compression.  decomp and dc are used for
-		stream.SetSendCompress(s.opts.cp.Type())
+	// decompression.  If comp and decomp are both set, they are the same;
+	// however they are kept separate to ensure that at most one of the
+	// compressor/decompressor variable pairs are set for use later.
+	var comp, decomp encoding.Compressor
+	var cp Compressor
+	var dc Decompressor
+
+	// If dc is set and matches the stream's compression, use it.  Otherwise, try
+	// to find a matching registered compressor for decomp.
+	if rc := stream.RecvCompress(); s.opts.dc != nil && s.opts.dc.Type() == rc {
+		dc = s.opts.dc
+	} else if rc != "" && rc != encoding.Identity {
+		decomp = encoding.GetCompressor(rc)
+		if decomp == nil {
+			st := status.Newf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", rc)
+			t.WriteStatus(stream, st)
+			return st.Err()
+		}
 	}
+
+	// If cp is set, use it.  Otherwise, attempt to compress the response using
+	// the incoming message compression method.
+	//
+	// NOTE: this needs to be ahead of all handling, https://github.com/grpc/grpc-go/issues/686.
+	if s.opts.cp != nil {
+		cp = s.opts.cp
+		stream.SetSendCompress(cp.Type())
+	} else if rc := stream.RecvCompress(); rc != "" && rc != encoding.Identity {
+		// Legacy compressor not specified; attempt to respond with same encoding.
+		comp = encoding.GetCompressor(rc)
+		if comp != nil {
+			stream.SetSendCompress(rc)
+		}
+	}
+
 	p := &parser{r: stream}
 	pf, req, err := p.recvMsg(s.opts.maxReceiveMessageSize)
 	if err == io.EOF {
@@ -769,7 +846,7 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 		return err
 	}
 	if err == io.ErrUnexpectedEOF {
-		err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error())
+		err = status.Errorf(codes.Internal, io.ErrUnexpectedEOF.Error())
 	}
 	if err != nil {
 		if st, ok := status.FromError(err); ok {
@@ -790,19 +867,11 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 		}
 		return err
 	}
-
+	if st := checkRecvPayload(pf, stream.RecvCompress(), dc != nil || decomp != nil); st != nil {
-	if err := checkRecvPayload(pf, stream.RecvCompress(), s.opts.dc); err != nil {
+		if e := t.WriteStatus(stream, st); e != nil {
-		if st, ok := status.FromError(err); ok {
-			if e := t.WriteStatus(stream, st); e != nil {
-				grpclog.Warningf("grpc: Server.processUnaryRPC failed to write status %v", e)
-			}
-			return err
-		}
-		if e := t.WriteStatus(stream, status.New(codes.Internal, err.Error())); e != nil {
 			grpclog.Warningf("grpc: Server.processUnaryRPC failed to write status %v", e)
 		}
-
+		return st.Err()
-		// TODO checkRecvPayload always return RPC error. Add a return here if necessary.
 	}
 	var inPayload *stats.InPayload
 	if sh != nil {
@@ -816,9 +885,17 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 		}
 		if pf == compressionMade {
 			var err error
-			req, err = s.opts.dc.Do(bytes.NewReader(req))
+			if dc != nil {
-			if err != nil {
+				req, err = dc.Do(bytes.NewReader(req))
-				return Errorf(codes.Internal, err.Error())
+				if err != nil {
+					return status.Errorf(codes.Internal, err.Error())
+				}
+			} else {
+				tmp, _ := decomp.Decompress(bytes.NewReader(req))
+				req, err = ioutil.ReadAll(tmp)
+				if err != nil {
+					return status.Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
+				}
 			}
 		}
 		if len(req) > s.opts.maxReceiveMessageSize {
@@ -826,7 +903,7 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 			// java implementation.
 			return status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", len(req), s.opts.maxReceiveMessageSize)
 		}
-		if err := s.opts.codec.Unmarshal(req, v); err != nil {
+		if err := s.getCodec(stream.ContentSubtype()).Unmarshal(req, v); err != nil {
 			return status.Errorf(codes.Internal, "grpc: error unmarshalling request: %v", err)
 		}
 		if inPayload != nil {
@@ -864,7 +941,8 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 		Last:  true,
 		Delay: false,
 	}
-	if err := s.sendResponse(t, stream, reply, s.opts.cp, opts); err != nil {
+
+	if err := s.sendResponse(t, stream, reply, cp, opts, comp); err != nil {
 		if err == io.EOF {
 			// The entire stream is done (for unary RPC only).
 			return err
@@ -913,21 +991,45 @@ func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transp
 			sh.HandleRPC(stream.Context(), end)
 		}()
 	}
-	if s.opts.cp != nil {
-		stream.SetSendCompress(s.opts.cp.Type())
-	}
 	ss := &serverStream{
 		t:     t,
 		s:     stream,
 		p:     &parser{r: stream},
-		codec: s.opts.codec,
+		codec: s.getCodec(stream.ContentSubtype()),
-		cp:    s.opts.cp,
-		dc:    s.opts.dc,
 		maxReceiveMessageSize: s.opts.maxReceiveMessageSize,
 		maxSendMessageSize:    s.opts.maxSendMessageSize,
 		trInfo:                trInfo,
 		statsHandler:          sh,
 	}
+
+	// If dc is set and matches the stream's compression, use it.  Otherwise, try
+	// to find a matching registered compressor for decomp.
+	if rc := stream.RecvCompress(); s.opts.dc != nil && s.opts.dc.Type() == rc {
+		ss.dc = s.opts.dc
+	} else if rc != "" && rc != encoding.Identity {
+		ss.decomp = encoding.GetCompressor(rc)
+		if ss.decomp == nil {
+			st := status.Newf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", rc)
+			t.WriteStatus(ss.s, st)
+			return st.Err()
+		}
+	}
+
+	// If cp is set, use it.  Otherwise, attempt to compress the response using
+	// the incoming message compression method.
+	//
+	// NOTE: this needs to be ahead of all handling, https://github.com/grpc/grpc-go/issues/686.
+	if s.opts.cp != nil {
+		ss.cp = s.opts.cp
+		stream.SetSendCompress(s.opts.cp.Type())
+	} else if rc := stream.RecvCompress(); rc != "" && rc != encoding.Identity {
+		// Legacy compressor not specified; attempt to respond with same encoding.
+		ss.comp = encoding.GetCompressor(rc)
+		if ss.comp != nil {
+			stream.SetSendCompress(rc)
+		}
+	}
+
 	if trInfo != nil {
 		trInfo.tr.LazyLog(&trInfo.firstLine, false)
 		defer func() {
@@ -1071,6 +1173,17 @@ func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Str
 // pending RPCs on the client side will get notified by connection
 // errors.
 func (s *Server) Stop() {
+	s.quitOnce.Do(func() {
+		close(s.quit)
+	})
+
+	defer func() {
+		s.serveWG.Wait()
+		s.doneOnce.Do(func() {
+			close(s.done)
+		})
+	}()
+
 	s.mu.Lock()
 	listeners := s.lis
 	s.lis = nil
@@ -1088,7 +1201,6 @@ func (s *Server) Stop() {
 	}
 
 	s.mu.Lock()
-	s.cancel()
 	if s.events != nil {
 		s.events.Finish()
 		s.events = nil
@@ -1100,22 +1212,38 @@ func (s *Server) Stop() {
 // accepting new connections and RPCs and blocks until all the pending RPCs are
 // finished.
 func (s *Server) GracefulStop() {
+	s.quitOnce.Do(func() {
+		close(s.quit)
+	})
+
+	defer func() {
+		s.doneOnce.Do(func() {
+			close(s.done)
+		})
+	}()
+
 	s.mu.Lock()
-	defer s.mu.Unlock()
 	if s.conns == nil {
+		s.mu.Unlock()
 		return
 	}
 	for lis := range s.lis {
 		lis.Close()
 	}
 	s.lis = nil
-	s.cancel()
 	if !s.drain {
 		for c := range s.conns {
 			c.(transport.ServerTransport).Drain()
 		}
 		s.drain = true
 	}
+
+	// Wait for serving threads to be ready to exit.  Only then can we be sure no
+	// new conns will be created.
+	s.mu.Unlock()
+	s.serveWG.Wait()
+	s.mu.Lock()
+
 	for len(s.conns) != 0 {
 		s.cv.Wait()
 	}
@@ -1124,26 +1252,29 @@ func (s *Server) GracefulStop() {
 		s.events.Finish()
 		s.events = nil
 	}
+	s.mu.Unlock()
 }
 
 func init() {
-	internal.TestingCloseConns = func(arg interface{}) {
-		arg.(*Server).testingCloseConns()
-	}
 	internal.TestingUseHandlerImpl = func(arg interface{}) {
 		arg.(*Server).opts.useHandlerImpl = true
 	}
 }
 
-// testingCloseConns closes all existing transports but keeps s.lis
+// contentSubtype must be lowercase
-// accepting new connections.
+// cannot return nil
-func (s *Server) testingCloseConns() {
+func (s *Server) getCodec(contentSubtype string) baseCodec {
-	s.mu.Lock()
+	if s.opts.codec != nil {
-	for c := range s.conns {
+		return s.opts.codec
-		c.Close()
-		delete(s.conns, c)
 	}
-	s.mu.Unlock()
+	if contentSubtype == "" {
+		return encoding.GetCodec(proto.Name)
+	}
+	codec := encoding.GetCodec(contentSubtype)
+	if codec == nil {
+		return encoding.GetCodec(proto.Name)
+	}
+	return codec
 }
 
 // SetHeader sets the header metadata.
@@ -1158,7 +1289,7 @@ func SetHeader(ctx context.Context, md metadata.MD) error {
 	}
 	stream, ok := transport.StreamFromContext(ctx)
 	if !ok {
-		return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx)
+		return status.Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx)
 	}
 	return stream.SetHeader(md)
 }
@@ -1168,7 +1299,7 @@ func SetHeader(ctx context.Context, md metadata.MD) error {
 func SendHeader(ctx context.Context, md metadata.MD) error {
 	stream, ok := transport.StreamFromContext(ctx)
 	if !ok {
-		return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx)
+		return status.Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx)
 	}
 	t := stream.ServerTransport()
 	if t == nil {
@@ -1188,7 +1319,7 @@ func SetTrailer(ctx context.Context, md metadata.MD) error {
 	}
 	stream, ok := transport.StreamFromContext(ctx)
 	if !ok {
-		return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx)
+		return status.Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx)
 	}
 	return stream.SetTrailer(md)
 }

vendor/google.golang.org/grpc/service_config.go

@@ -0,0 +1,226 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"encoding/json"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	"google.golang.org/grpc/grpclog"
+)
+
+const maxInt = int(^uint(0) >> 1)
+
+// MethodConfig defines the configuration recommended by the service providers for a
+// particular method.
+// DEPRECATED: Users should not use this struct. Service config should be received
+// through name resolver, as specified here
+// https://github.com/grpc/grpc/blob/master/doc/service_config.md
+type MethodConfig struct {
+	// WaitForReady indicates whether RPCs sent to this method should wait until
+	// the connection is ready by default (!failfast). The value specified via the
+	// gRPC client API will override the value set here.
+	WaitForReady *bool
+	// Timeout is the default timeout for RPCs sent to this method. The actual
+	// deadline used will be the minimum of the value specified here and the value
+	// set by the application via the gRPC client API.  If either one is not set,
+	// then the other will be used.  If neither is set, then the RPC has no deadline.
+	Timeout *time.Duration
+	// MaxReqSize is the maximum allowed payload size for an individual request in a
+	// stream (client->server) in bytes. The size which is measured is the serialized
+	// payload after per-message compression (but before stream compression) in bytes.
+	// The actual value used is the minimum of the value specified here and the value set
+	// by the application via the gRPC client API. If either one is not set, then the other
+	// will be used.  If neither is set, then the built-in default is used.
+	MaxReqSize *int
+	// MaxRespSize is the maximum allowed payload size for an individual response in a
+	// stream (server->client) in bytes.
+	MaxRespSize *int
+}
+
+// ServiceConfig is provided by the service provider and contains parameters for how
+// clients that connect to the service should behave.
+// DEPRECATED: Users should not use this struct. Service config should be received
+// through name resolver, as specified here
+// https://github.com/grpc/grpc/blob/master/doc/service_config.md
+type ServiceConfig struct {
+	// LB is the load balancer the service providers recommends. The balancer specified
+	// via grpc.WithBalancer will override this.
+	LB *string
+	// Methods contains a map for the methods in this service.
+	// If there is an exact match for a method (i.e. /service/method) in the map, use the corresponding MethodConfig.
+	// If there's no exact match, look for the default config for the service (/service/) and use the corresponding MethodConfig if it exists.
+	// Otherwise, the method has no MethodConfig to use.
+	Methods map[string]MethodConfig
+}
+
+func parseDuration(s *string) (*time.Duration, error) {
+	if s == nil {
+		return nil, nil
+	}
+	if !strings.HasSuffix(*s, "s") {
+		return nil, fmt.Errorf("malformed duration %q", *s)
+	}
+	ss := strings.SplitN((*s)[:len(*s)-1], ".", 3)
+	if len(ss) > 2 {
+		return nil, fmt.Errorf("malformed duration %q", *s)
+	}
+	// hasDigits is set if either the whole or fractional part of the number is
+	// present, since both are optional but one is required.
+	hasDigits := false
+	var d time.Duration
+	if len(ss[0]) > 0 {
+		i, err := strconv.ParseInt(ss[0], 10, 32)
+		if err != nil {
+			return nil, fmt.Errorf("malformed duration %q: %v", *s, err)
+		}
+		d = time.Duration(i) * time.Second
+		hasDigits = true
+	}
+	if len(ss) == 2 && len(ss[1]) > 0 {
+		if len(ss[1]) > 9 {
+			return nil, fmt.Errorf("malformed duration %q", *s)
+		}
+		f, err := strconv.ParseInt(ss[1], 10, 64)
+		if err != nil {
+			return nil, fmt.Errorf("malformed duration %q: %v", *s, err)
+		}
+		for i := 9; i > len(ss[1]); i-- {
+			f *= 10
+		}
+		d += time.Duration(f)
+		hasDigits = true
+	}
+	if !hasDigits {
+		return nil, fmt.Errorf("malformed duration %q", *s)
+	}
+
+	return &d, nil
+}
+
+type jsonName struct {
+	Service *string
+	Method  *string
+}
+
+func (j jsonName) generatePath() (string, bool) {
+	if j.Service == nil {
+		return "", false
+	}
+	res := "/" + *j.Service + "/"
+	if j.Method != nil {
+		res += *j.Method
+	}
+	return res, true
+}
+
+// TODO(lyuxuan): delete this struct after cleaning up old service config implementation.
+type jsonMC struct {
+	Name                    *[]jsonName
+	WaitForReady            *bool
+	Timeout                 *string
+	MaxRequestMessageBytes  *int64
+	MaxResponseMessageBytes *int64
+}
+
+// TODO(lyuxuan): delete this struct after cleaning up old service config implementation.
+type jsonSC struct {
+	LoadBalancingPolicy *string
+	MethodConfig        *[]jsonMC
+}
+
+func parseServiceConfig(js string) (ServiceConfig, error) {
+	var rsc jsonSC
+	err := json.Unmarshal([]byte(js), &rsc)
+	if err != nil {
+		grpclog.Warningf("grpc: parseServiceConfig error unmarshaling %s due to %v", js, err)
+		return ServiceConfig{}, err
+	}
+	sc := ServiceConfig{
+		LB:      rsc.LoadBalancingPolicy,
+		Methods: make(map[string]MethodConfig),
+	}
+	if rsc.MethodConfig == nil {
+		return sc, nil
+	}
+
+	for _, m := range *rsc.MethodConfig {
+		if m.Name == nil {
+			continue
+		}
+		d, err := parseDuration(m.Timeout)
+		if err != nil {
+			grpclog.Warningf("grpc: parseServiceConfig error unmarshaling %s due to %v", js, err)
+			return ServiceConfig{}, err
+		}
+
+		mc := MethodConfig{
+			WaitForReady: m.WaitForReady,
+			Timeout:      d,
+		}
+		if m.MaxRequestMessageBytes != nil {
+			if *m.MaxRequestMessageBytes > int64(maxInt) {
+				mc.MaxReqSize = newInt(maxInt)
+			} else {
+				mc.MaxReqSize = newInt(int(*m.MaxRequestMessageBytes))
+			}
+		}
+		if m.MaxResponseMessageBytes != nil {
+			if *m.MaxResponseMessageBytes > int64(maxInt) {
+				mc.MaxRespSize = newInt(maxInt)
+			} else {
+				mc.MaxRespSize = newInt(int(*m.MaxResponseMessageBytes))
+			}
+		}
+		for _, n := range *m.Name {
+			if path, valid := n.generatePath(); valid {
+				sc.Methods[path] = mc
+			}
+		}
+	}
+
+	return sc, nil
+}
+
+func min(a, b *int) *int {
+	if *a < *b {
+		return a
+	}
+	return b
+}
+
+func getMaxSize(mcMax, doptMax *int, defaultVal int) *int {
+	if mcMax == nil && doptMax == nil {
+		return &defaultVal
+	}
+	if mcMax != nil && doptMax != nil {
+		return min(mcMax, doptMax)
+	}
+	if mcMax != nil {
+		return mcMax
+	}
+	return doptMax
+}
+
+func newInt(b int) *int {
+	return &b
+}

vendor/google.golang.org/grpc/status/status.go

@@ -120,15 +120,23 @@ func FromProto(s *spb.Status) *Status {
 }
 
 // FromError returns a Status representing err if it was produced from this
-// package, otherwise it returns nil, false.
+// package. Otherwise, ok is false and a Status is returned with codes.Unknown
+// and the original error message.
 func FromError(err error) (s *Status, ok bool) {
 	if err == nil {
 		return &Status{s: &spb.Status{Code: int32(codes.OK)}}, true
 	}
-	if s, ok := err.(*statusError); ok {
+	if se, ok := err.(*statusError); ok {
-		return s.status(), true
+		return se.status(), true
 	}
-	return nil, false
+	return New(codes.Unknown, err.Error()), false
+}
+
+// Convert is a convenience function which removes the need to handle the
+// boolean return value from FromError.
+func Convert(err error) *Status {
+	s, _ := FromError(err)
+	return s
 }
 
 // WithDetails returns a new status with the provided details messages appended to the status.
@@ -166,3 +174,16 @@ func (s *Status) Details() []interface{} {
 	}
 	return details
 }
+
+// Code returns the Code of the error if it is a Status error, codes.OK if err
+// is nil, or codes.Unknown otherwise.
+func Code(err error) codes.Code {
+	// Don't use FromError to avoid allocation of OK status.
+	if err == nil {
+		return codes.OK
+	}
+	if se, ok := err.(*statusError); ok {
+		return se.status().Code()
+	}
+	return codes.Unknown
+}

vendor/google.golang.org/grpc/stream.go

@@ -19,7 +19,6 @@
 package grpc
 
 import (
-	"bytes"
 	"errors"
 	"io"
 	"sync"
@@ -29,8 +28,8 @@ import (
 	"golang.org/x/net/trace"
 	"google.golang.org/grpc/balancer"
 	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/encoding"
 	"google.golang.org/grpc/metadata"
-	"google.golang.org/grpc/peer"
 	"google.golang.org/grpc/stats"
 	"google.golang.org/grpc/status"
 	"google.golang.org/grpc/transport"
@@ -51,6 +50,8 @@ type StreamDesc struct {
 }
 
 // Stream defines the common interface a client or server stream has to satisfy.
+//
+// All errors returned from Stream are compatible with the status package.
 type Stream interface {
 	// Context returns the context for this stream.
 	Context() context.Context
@@ -89,41 +90,52 @@ type ClientStream interface {
 	// Stream.SendMsg() may return a non-nil error when something wrong happens sending
 	// the request. The returned error indicates the status of this sending, not the final
 	// status of the RPC.
-	// Always call Stream.RecvMsg() to get the final status if you care about the status of
+	//
-	// the RPC.
+	// Always call Stream.RecvMsg() to drain the stream and get the final
+	// status, otherwise there could be leaked resources.
 	Stream
 }
 
-// NewClientStream creates a new Stream for the client side. This is called
+// NewStream creates a new Stream for the client side. This is typically
-// by generated code.
+// called by generated code.
-func NewClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) {
+func (cc *ClientConn) NewStream(ctx context.Context, desc *StreamDesc, method string, opts ...CallOption) (ClientStream, error) {
 	if cc.dopts.streamInt != nil {
 		return cc.dopts.streamInt(ctx, desc, cc, method, newClientStream, opts...)
 	}
 	return newClientStream(ctx, desc, cc, method, opts...)
 }
 
+// NewClientStream creates a new Stream for the client side. This is typically
+// called by generated code.
+//
+// DEPRECATED: Use ClientConn.NewStream instead.
+func NewClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (ClientStream, error) {
+	return cc.NewStream(ctx, desc, method, opts...)
+}
+
 func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) {
-	var (
-		t      transport.ClientTransport
-		s      *transport.Stream
-		done   func(balancer.DoneInfo)
-		cancel context.CancelFunc
-	)
 	c := defaultCallInfo()
 	mc := cc.GetMethodConfig(method)
 	if mc.WaitForReady != nil {
 		c.failFast = !*mc.WaitForReady
 	}
 
-	if mc.Timeout != nil {
+	// Possible context leak:
+	// The cancel function for the child context we create will only be called
+	// when RecvMsg returns a non-nil error, if the ClientConn is closed, or if
+	// an error is generated by SendMsg.
+	// https://github.com/grpc/grpc-go/issues/1818.
+	var cancel context.CancelFunc
+	if mc.Timeout != nil && *mc.Timeout >= 0 {
 		ctx, cancel = context.WithTimeout(ctx, *mc.Timeout)
-		defer func() {
+	} else {
-			if err != nil {
+		ctx, cancel = context.WithCancel(ctx)
-				cancel()
-			}
-		}()
 	}
+	defer func() {
+		if err != nil {
+			cancel()
+		}
+	}()
 
 	opts = append(cc.dopts.callOptions, opts...)
 	for _, o := range opts {
@@ -133,6 +145,9 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 	}
 	c.maxSendMessageSize = getMaxSize(mc.MaxReqSize, c.maxSendMessageSize, defaultClientMaxSendMessageSize)
 	c.maxReceiveMessageSize = getMaxSize(mc.MaxRespSize, c.maxReceiveMessageSize, defaultClientMaxReceiveMessageSize)
+	if err := setCallInfoCodec(c); err != nil {
+		return nil, err
+	}
 
 	callHdr := &transport.CallHdr{
 		Host:   cc.authority,
@@ -141,10 +156,27 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 		// so we don't flush the header.
 		// If it's client streaming, the user may never send a request or send it any
 		// time soon, so we ask the transport to flush the header.
-		Flush: desc.ClientStreams,
+		Flush:          desc.ClientStreams,
+		ContentSubtype: c.contentSubtype,
 	}
-	if cc.dopts.cp != nil {
+
+	// Set our outgoing compression according to the UseCompressor CallOption, if
+	// set.  In that case, also find the compressor from the encoding package.
+	// Otherwise, use the compressor configured by the WithCompressor DialOption,
+	// if set.
+	var cp Compressor
+	var comp encoding.Compressor
+	if ct := c.compressorType; ct != "" {
+		callHdr.SendCompress = ct
+		if ct != encoding.Identity {
+			comp = encoding.GetCompressor(ct)
+			if comp == nil {
+				return nil, status.Errorf(codes.Internal, "grpc: Compressor is not installed for requested grpc-encoding %q", ct)
+			}
+		}
+	} else if cc.dopts.cp != nil {
 		callHdr.SendCompress = cc.dopts.cp.Type()
+		cp = cc.dopts.cp
 	}
 	if c.creds != nil {
 		callHdr.Creds = c.creds
@@ -189,53 +221,53 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 			}
 		}()
 	}
+
+	var (
+		t    transport.ClientTransport
+		s    *transport.Stream
+		done func(balancer.DoneInfo)
+	)
 	for {
+		// Check to make sure the context has expired.  This will prevent us from
+		// looping forever if an error occurs for wait-for-ready RPCs where no data
+		// is sent on the wire.
+		select {
+		case <-ctx.Done():
+			return nil, toRPCErr(ctx.Err())
+		default:
+		}
+
 		t, done, err = cc.getTransport(ctx, c.failFast)
 		if err != nil {
-			// TODO(zhaoq): Probably revisit the error handling.
+			return nil, err
-			if _, ok := status.FromError(err); ok {
-				return nil, err
-			}
-			if err == errConnClosing || err == errConnUnavailable {
-				if c.failFast {
-					return nil, Errorf(codes.Unavailable, "%v", err)
-				}
-				continue
-			}
-			// All the other errors are treated as Internal errors.
-			return nil, Errorf(codes.Internal, "%v", err)
 		}
 
 		s, err = t.NewStream(ctx, callHdr)
 		if err != nil {
-			if _, ok := err.(transport.ConnectionError); ok && done != nil {
-				// If error is connection error, transport was sending data on wire,
-				// and we are not sure if anything has been sent on wire.
-				// If error is not connection error, we are sure nothing has been sent.
-				updateRPCInfoInContext(ctx, rpcInfo{bytesSent: true, bytesReceived: false})
-			}
 			if done != nil {
 				done(balancer.DoneInfo{Err: err})
 				done = nil
 			}
-			if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
+			// In the event of any error from NewStream, we never attempted to write
+			// anything to the wire, so we can retry indefinitely for non-fail-fast
+			// RPCs.
+			if !c.failFast {
 				continue
 			}
 			return nil, toRPCErr(err)
 		}
 		break
 	}
-	// Set callInfo.peer object from stream's context.
+
-	if peer, ok := peer.FromContext(s.Context()); ok {
+	c.stream = s
-		c.peer = peer
-	}
 	cs := &clientStream{
 		opts:   opts,
 		c:      c,
 		desc:   desc,
-		codec:  cc.dopts.codec,
+		codec:  c.codec,
-		cp:     cc.dopts.cp,
+		cp:     cp,
 		dc:     cc.dopts.dc,
+		comp:   comp,
 		cancel: cancel,
 
 		done: done,
@@ -249,50 +281,49 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 		statsCtx:     ctx,
 		statsHandler: cc.dopts.copts.StatsHandler,
 	}
-	// Listen on ctx.Done() to detect cancellation and s.Done() to detect normal termination
+	if desc != unaryStreamDesc {
-	// when there is no pending I/O operations on this stream.
+		// Listen on cc and stream contexts to cleanup when the user closes the
-	go func() {
+		// ClientConn or cancels the stream context.  In all other cases, an error
-		select {
+		// should already be injected into the recv buffer by the transport, which
-		case <-t.Error():
+		// the client will eventually receive, and then we will cancel the stream's
-			// Incur transport error, simply exit.
+		// context in clientStream.finish.
-		case <-cc.ctx.Done():
+		go func() {
-			cs.finish(ErrClientConnClosing)
+			select {
-			cs.closeTransportStream(ErrClientConnClosing)
+			case <-cc.ctx.Done():
-		case <-s.Done():
+				cs.finish(ErrClientConnClosing)
-			// TODO: The trace of the RPC is terminated here when there is no pending
+			case <-ctx.Done():
-			// I/O, which is probably not the optimal solution.
+				cs.finish(toRPCErr(s.Context().Err()))
-			cs.finish(s.Status().Err())
+			}
-			cs.closeTransportStream(nil)
+		}()
-		case <-s.GoAway():
+	}
-			cs.finish(errConnDrain)
-			cs.closeTransportStream(errConnDrain)
-		case <-s.Context().Done():
-			err := s.Context().Err()
-			cs.finish(err)
-			cs.closeTransportStream(transport.ContextErr(err))
-		}
-	}()
 	return cs, nil
 }
 
 // clientStream implements a client side Stream.
 type clientStream struct {
-	opts   []CallOption
+	opts []CallOption
-	c      *callInfo
+	c    *callInfo
-	t      transport.ClientTransport
+	t    transport.ClientTransport
-	s      *transport.Stream
+	s    *transport.Stream
-	p      *parser
+	p    *parser
-	desc   *StreamDesc
+	desc *StreamDesc
-	codec  Codec
+
-	cp     Compressor
+	codec     baseCodec
-	dc     Decompressor
+	cp        Compressor
+	dc        Decompressor
+	comp      encoding.Compressor
+	decomp    encoding.Compressor
+	decompSet bool
+
+	// cancel is only called when RecvMsg() returns non-nil error, which means
+	// the stream finishes with error or with io.EOF.
 	cancel context.CancelFunc
 
 	tracing bool // set to EnableTracing when the clientStream is created.
 
 	mu       sync.Mutex
 	done     func(balancer.DoneInfo)
-	closed   bool
+	sentLast bool // sent an end stream
 	finished bool
 	// trInfo.tr is set when the clientStream is created (if EnableTracing is true),
 	// and is set to nil when the clientStream's finish method is called.
@@ -312,9 +343,8 @@ func (cs *clientStream) Context() context.Context {
 func (cs *clientStream) Header() (metadata.MD, error) {
 	m, err := cs.s.Header()
 	if err != nil {
-		if _, ok := err.(transport.ConnectionError); !ok {
+		err = toRPCErr(err)
-			cs.closeTransportStream(err)
+		cs.finish(err)
-		}
 	}
 	return m, err
 }
@@ -324,6 +354,7 @@ func (cs *clientStream) Trailer() metadata.MD {
 }
 
 func (cs *clientStream) SendMsg(m interface{}) (err error) {
+	// TODO: Check cs.sentLast and error if we already ended the stream.
 	if cs.tracing {
 		cs.mu.Lock()
 		if cs.trInfo.tr != nil {
@@ -334,26 +365,18 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
 	// TODO Investigate how to signal the stats handling party.
 	// generate error stats if err != nil && err != io.EOF?
 	defer func() {
-		if err != nil {
+		// For non-client-streaming RPCs, we return nil instead of EOF on success
+		// because the generated code requires it.  finish is not called; RecvMsg()
+		// will call it with the stream's status independently.
+		if err == io.EOF && !cs.desc.ClientStreams {
+			err = nil
+		}
+		if err != nil && err != io.EOF {
+			// Call finish for errors generated by this SendMsg call.  (Transport
+			// errors are converted to an io.EOF error below; the real error will be
+			// returned from RecvMsg eventually in that case.)
 			cs.finish(err)
 		}
-		if err == nil {
-			return
-		}
-		if err == io.EOF {
-			// Specialize the process for server streaming. SendMsg is only called
-			// once when creating the stream object. io.EOF needs to be skipped when
-			// the rpc is early finished (before the stream object is created.).
-			// TODO: It is probably better to move this into the generated code.
-			if !cs.desc.ClientStreams && cs.desc.ServerStreams {
-				err = nil
-			}
-			return
-		}
-		if _, ok := err.(transport.ConnectionError); !ok {
-			cs.closeTransportStream(err)
-		}
-		err = toRPCErr(err)
 	}()
 	var outPayload *stats.OutPayload
 	if cs.statsHandler != nil {
@@ -361,154 +384,143 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
 			Client: true,
 		}
 	}
-	hdr, data, err := encode(cs.codec, m, cs.cp, bytes.NewBuffer([]byte{}), outPayload)
+	hdr, data, err := encode(cs.codec, m, cs.cp, outPayload, cs.comp)
 	if err != nil {
 		return err
 	}
-	if cs.c.maxSendMessageSize == nil {
-		return Errorf(codes.Internal, "callInfo maxSendMessageSize field uninitialized(nil)")
-	}
 	if len(data) > *cs.c.maxSendMessageSize {
-		return Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(data), *cs.c.maxSendMessageSize)
+		return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(data), *cs.c.maxSendMessageSize)
 	}
-	err = cs.t.Write(cs.s, hdr, data, &transport.Options{Last: false})
+	if !cs.desc.ClientStreams {
-	if err == nil && outPayload != nil {
+		cs.sentLast = true
-		outPayload.SentTime = time.Now()
-		cs.statsHandler.HandleRPC(cs.statsCtx, outPayload)
 	}
-	return err
+	err = cs.t.Write(cs.s, hdr, data, &transport.Options{Last: !cs.desc.ClientStreams})
+	if err == nil {
+		if outPayload != nil {
+			outPayload.SentTime = time.Now()
+			cs.statsHandler.HandleRPC(cs.statsCtx, outPayload)
+		}
+		return nil
+	}
+	return io.EOF
 }
 
 func (cs *clientStream) RecvMsg(m interface{}) (err error) {
+	defer func() {
+		if err != nil || !cs.desc.ServerStreams {
+			// err != nil or non-server-streaming indicates end of stream.
+			cs.finish(err)
+		}
+	}()
 	var inPayload *stats.InPayload
 	if cs.statsHandler != nil {
 		inPayload = &stats.InPayload{
 			Client: true,
 		}
 	}
-	if cs.c.maxReceiveMessageSize == nil {
+	if !cs.decompSet {
-		return Errorf(codes.Internal, "callInfo maxReceiveMessageSize field uninitialized(nil)")
+		// Block until we receive headers containing received message encoding.
+		if ct := cs.s.RecvCompress(); ct != "" && ct != encoding.Identity {
+			if cs.dc == nil || cs.dc.Type() != ct {
+				// No configured decompressor, or it does not match the incoming
+				// message encoding; attempt to find a registered compressor that does.
+				cs.dc = nil
+				cs.decomp = encoding.GetCompressor(ct)
+			}
+		} else {
+			// No compression is used; disable our decompressor.
+			cs.dc = nil
+		}
+		// Only initialize this state once per stream.
+		cs.decompSet = true
 	}
-	err = recv(cs.p, cs.codec, cs.s, cs.dc, m, *cs.c.maxReceiveMessageSize, inPayload)
+	err = recv(cs.p, cs.codec, cs.s, cs.dc, m, *cs.c.maxReceiveMessageSize, inPayload, cs.decomp)
-	defer func() {
+	if err != nil {
-		// err != nil indicates the termination of the stream.
-		if err != nil {
-			cs.finish(err)
-		}
-	}()
-	if err == nil {
-		if cs.tracing {
-			cs.mu.Lock()
-			if cs.trInfo.tr != nil {
-				cs.trInfo.tr.LazyLog(&payload{sent: false, msg: m}, true)
-			}
-			cs.mu.Unlock()
-		}
-		if inPayload != nil {
-			cs.statsHandler.HandleRPC(cs.statsCtx, inPayload)
-		}
-		if !cs.desc.ClientStreams || cs.desc.ServerStreams {
-			return
-		}
-		// Special handling for client streaming rpc.
-		// This recv expects EOF or errors, so we don't collect inPayload.
-		if cs.c.maxReceiveMessageSize == nil {
-			return Errorf(codes.Internal, "callInfo maxReceiveMessageSize field uninitialized(nil)")
-		}
-		err = recv(cs.p, cs.codec, cs.s, cs.dc, m, *cs.c.maxReceiveMessageSize, nil)
-		cs.closeTransportStream(err)
-		if err == nil {
-			return toRPCErr(errors.New("grpc: client streaming protocol violation: get <nil>, want <EOF>"))
-		}
 		if err == io.EOF {
-			if se := cs.s.Status().Err(); se != nil {
+			if statusErr := cs.s.Status().Err(); statusErr != nil {
-				return se
+				return statusErr
 			}
-			cs.finish(err)
+			return io.EOF // indicates successful end of stream.
-			return nil
 		}
 		return toRPCErr(err)
 	}
-	if _, ok := err.(transport.ConnectionError); !ok {
+	if cs.tracing {
-		cs.closeTransportStream(err)
+		cs.mu.Lock()
+		if cs.trInfo.tr != nil {
+			cs.trInfo.tr.LazyLog(&payload{sent: false, msg: m}, true)
+		}
+		cs.mu.Unlock()
+	}
+	if inPayload != nil {
+		cs.statsHandler.HandleRPC(cs.statsCtx, inPayload)
+	}
+	if cs.desc.ServerStreams {
+		// Subsequent messages should be received by subsequent RecvMsg calls.
+		return nil
+	}
+
+	// Special handling for non-server-stream rpcs.
+	// This recv expects EOF or errors, so we don't collect inPayload.
+	err = recv(cs.p, cs.codec, cs.s, cs.dc, m, *cs.c.maxReceiveMessageSize, nil, cs.decomp)
+	if err == nil {
+		return toRPCErr(errors.New("grpc: client streaming protocol violation: get <nil>, want <EOF>"))
 	}
 	if err == io.EOF {
-		if statusErr := cs.s.Status().Err(); statusErr != nil {
+		return cs.s.Status().Err() // non-server streaming Recv returns nil on success
-			return statusErr
-		}
-		// Returns io.EOF to indicate the end of the stream.
-		return
 	}
 	return toRPCErr(err)
 }
 
-func (cs *clientStream) CloseSend() (err error) {
+func (cs *clientStream) CloseSend() error {
-	err = cs.t.Write(cs.s, nil, nil, &transport.Options{Last: true})
+	if cs.sentLast {
-	defer func() {
-		if err != nil {
-			cs.finish(err)
-		}
-	}()
-	if err == nil || err == io.EOF {
 		return nil
 	}
-	if _, ok := err.(transport.ConnectionError); !ok {
+	cs.sentLast = true
-		cs.closeTransportStream(err)
+	cs.t.Write(cs.s, nil, nil, &transport.Options{Last: true})
-	}
+	// We ignore errors from Write and always return nil here.  Any error it
-	err = toRPCErr(err)
+	// would return would also be returned by a subsequent RecvMsg call, and the
-	return
+	// user is supposed to always finish the stream by calling RecvMsg until it
-}
+	// returns err != nil.
-
+	return nil
-func (cs *clientStream) closeTransportStream(err error) {
-	cs.mu.Lock()
-	if cs.closed {
-		cs.mu.Unlock()
-		return
-	}
-	cs.closed = true
-	cs.mu.Unlock()
-	cs.t.CloseStream(cs.s, err)
 }
 
 func (cs *clientStream) finish(err error) {
+	if err == io.EOF {
+		// Ending a stream with EOF indicates a success.
+		err = nil
+	}
 	cs.mu.Lock()
 	defer cs.mu.Unlock()
 	if cs.finished {
 		return
 	}
 	cs.finished = true
-	defer func() {
+	cs.t.CloseStream(cs.s, err)
-		if cs.cancel != nil {
-			cs.cancel()
-		}
-	}()
 	for _, o := range cs.opts {
 		o.after(cs.c)
 	}
 	if cs.done != nil {
-		updateRPCInfoInContext(cs.s.Context(), rpcInfo{
+		cs.done(balancer.DoneInfo{
-			bytesSent:     cs.s.BytesSent(),
+			Err:           err,
-			bytesReceived: cs.s.BytesReceived(),
+			BytesSent:     true,
+			BytesReceived: cs.s.BytesReceived(),
 		})
-		cs.done(balancer.DoneInfo{Err: err})
 		cs.done = nil
 	}
 	if cs.statsHandler != nil {
 		end := &stats.End{
 			Client:  true,
 			EndTime: time.Now(),
-		}
+			Error:   err,
-		if err != io.EOF {
-			// end.Error is nil if the RPC finished successfully.
-			end.Error = toRPCErr(err)
 		}
 		cs.statsHandler.HandleRPC(cs.statsCtx, end)
 	}
+	cs.cancel()
 	if !cs.tracing {
 		return
 	}
 	if cs.trInfo.tr != nil {
-		if err == nil || err == io.EOF {
+		if err == nil {
 			cs.trInfo.tr.LazyPrintf("RPC: [OK]")
 		} else {
 			cs.trInfo.tr.LazyPrintf("RPC: [%v]", err)
@@ -540,12 +552,16 @@ type ServerStream interface {
 
 // serverStream implements a server side Stream.
 type serverStream struct {
-	t                     transport.ServerTransport
+	t     transport.ServerTransport
-	s                     *transport.Stream
+	s     *transport.Stream
-	p                     *parser
+	p     *parser
-	codec                 Codec
+	codec baseCodec
-	cp                    Compressor
+
-	dc                    Decompressor
+	cp     Compressor
+	dc     Decompressor
+	comp   encoding.Compressor
+	decomp encoding.Compressor
+
 	maxReceiveMessageSize int
 	maxSendMessageSize    int
 	trInfo                *traceInfo
@@ -601,12 +617,12 @@ func (ss *serverStream) SendMsg(m interface{}) (err error) {
 	if ss.statsHandler != nil {
 		outPayload = &stats.OutPayload{}
 	}
-	hdr, data, err := encode(ss.codec, m, ss.cp, bytes.NewBuffer([]byte{}), outPayload)
+	hdr, data, err := encode(ss.codec, m, ss.cp, outPayload, ss.comp)
 	if err != nil {
 		return err
 	}
 	if len(data) > ss.maxSendMessageSize {
-		return Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(data), ss.maxSendMessageSize)
+		return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(data), ss.maxSendMessageSize)
 	}
 	if err := ss.t.Write(ss.s, hdr, data, &transport.Options{Last: false}); err != nil {
 		return toRPCErr(err)
@@ -641,12 +657,12 @@ func (ss *serverStream) RecvMsg(m interface{}) (err error) {
 	if ss.statsHandler != nil {
 		inPayload = &stats.InPayload{}
 	}
-	if err := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxReceiveMessageSize, inPayload); err != nil {
+	if err := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxReceiveMessageSize, inPayload, ss.decomp); err != nil {
 		if err == io.EOF {
 			return err
 		}
 		if err == io.ErrUnexpectedEOF {
-			err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error())
+			err = status.Errorf(codes.Internal, io.ErrUnexpectedEOF.Error())
 		}
 		return toRPCErr(err)
 	}
@@ -655,3 +671,13 @@ func (ss *serverStream) RecvMsg(m interface{}) (err error) {
 	}
 	return nil
 }
+
+// MethodFromServerStream returns the method string for the input stream.
+// The returned string is in the format of "/service/method".
+func MethodFromServerStream(stream ServerStream) (string, bool) {
+	s, ok := transport.StreamFromContext(stream.Context())
+	if !ok {
+		return "", ok
+	}
+	return s.Method(), ok
+}

vendor/google.golang.org/grpc/transport/bdp_estimator.go

@@ -41,12 +41,9 @@ const (
 	gamma = 2
 )
 
-var (
+// Adding arbitrary data to ping so that its ack can be identified.
-	// Adding arbitrary data to ping so that its ack can be
+// Easter-egg: what does the ping message say?
-	// identified.
+var bdpPing = &ping{data: [8]byte{2, 4, 16, 16, 9, 14, 7, 7}}
-	// Easter-egg: what does the ping message say?
-	bdpPing = &ping{data: [8]byte{2, 4, 16, 16, 9, 14, 7, 7}}
-)
 
 type bdpEstimator struct {
 	// sentAt is the time when the ping was sent.

vendor/google.golang.org/grpc/transport/control.go

@@ -20,9 +20,9 @@ package transport
 
 import (
 	"fmt"
+	"io"
 	"math"
 	"sync"
-	"sync/atomic"
 	"time"
 
 	"golang.org/x/net/http2"
@@ -49,7 +49,7 @@ const (
 	// defaultLocalSendQuota sets is default value for number of data
 	// bytes that each stream can schedule before some of it being
 	// flushed out.
-	defaultLocalSendQuota = 64 * 1024
+	defaultLocalSendQuota = 128 * 1024
 )
 
 // The following defines various control items which could flow through
@@ -89,12 +89,16 @@ type windowUpdate struct {
 func (*windowUpdate) item() {}
 
 type settings struct {
-	ack bool
+	ss []http2.Setting
-	ss  []http2.Setting
 }
 
 func (*settings) item() {}
 
+type settingsAck struct {
+}
+
+func (*settingsAck) item() {}
+
 type resetStream struct {
 	streamID uint32
 	code     http2.ErrCode
@@ -112,6 +116,7 @@ type goAway struct {
 func (*goAway) item() {}
 
 type flushIO struct {
+	closeTr bool
 }
 
 func (*flushIO) item() {}
@@ -126,9 +131,8 @@ func (*ping) item() {}
 // quotaPool is a pool which accumulates the quota and sends it to acquire()
 // when it is available.
 type quotaPool struct {
-	c chan int
-
 	mu      sync.Mutex
+	c       chan struct{}
 	version uint32
 	quota   int
 }
@@ -136,12 +140,8 @@ type quotaPool struct {
 // newQuotaPool creates a quotaPool which has quota q available to consume.
 func newQuotaPool(q int) *quotaPool {
 	qb := &quotaPool{
-		c: make(chan int, 1),
+		quota: q,
-	}
+		c:     make(chan struct{}, 1),
-	if q > 0 {
-		qb.c <- q
-	} else {
-		qb.quota = q
 	}
 	return qb
 }
@@ -155,60 +155,83 @@ func (qb *quotaPool) add(v int) {
 }
 
 func (qb *quotaPool) lockedAdd(v int) {
-	select {
+	var wakeUp bool
-	case n := <-qb.c:
+	if qb.quota <= 0 {
-		qb.quota += n
+		wakeUp = true // Wake up potential waiters.
-	default:
 	}
 	qb.quota += v
-	if qb.quota <= 0 {
+	if wakeUp && qb.quota > 0 {
-		return
+		select {
-	}
+		case qb.c <- struct{}{}:
-	// After the pool has been created, this is the only place that sends on
+		default:
-	// the channel. Since mu is held at this point and any quota that was sent
+		}
-	// on the channel has been retrieved, we know that this code will always
-	// place any positive quota value on the channel.
-	select {
-	case qb.c <- qb.quota:
-		qb.quota = 0
-	default:
 	}
 }
 
 func (qb *quotaPool) addAndUpdate(v int) {
 	qb.mu.Lock()
-	defer qb.mu.Unlock()
 	qb.lockedAdd(v)
-	// Update the version only after having added to the quota
+	qb.version++
-	// so that if acquireWithVesrion sees the new vesrion it is
+	qb.mu.Unlock()
-	// guaranteed to have seen the updated quota.
-	// Also, still keep this inside of the lock, so that when
-	// compareAndExecute is processing, this function doesn't
-	// get executed partially (quota gets updated but the version
-	// doesn't).
-	atomic.AddUint32(&(qb.version), 1)
 }
 
-func (qb *quotaPool) acquireWithVersion() (<-chan int, uint32) {
+func (qb *quotaPool) get(v int, wc waiters) (int, uint32, error) {
-	return qb.c, atomic.LoadUint32(&(qb.version))
+	qb.mu.Lock()
+	if qb.quota > 0 {
+		if v > qb.quota {
+			v = qb.quota
+		}
+		qb.quota -= v
+		ver := qb.version
+		qb.mu.Unlock()
+		return v, ver, nil
+	}
+	qb.mu.Unlock()
+	for {
+		select {
+		case <-wc.ctx.Done():
+			return 0, 0, ContextErr(wc.ctx.Err())
+		case <-wc.tctx.Done():
+			return 0, 0, ErrConnClosing
+		case <-wc.done:
+			return 0, 0, io.EOF
+		case <-wc.goAway:
+			return 0, 0, errStreamDrain
+		case <-qb.c:
+			qb.mu.Lock()
+			if qb.quota > 0 {
+				if v > qb.quota {
+					v = qb.quota
+				}
+				qb.quota -= v
+				ver := qb.version
+				if qb.quota > 0 {
+					select {
+					case qb.c <- struct{}{}:
+					default:
+					}
+				}
+				qb.mu.Unlock()
+				return v, ver, nil
+
+			}
+			qb.mu.Unlock()
+		}
+	}
 }
 
 func (qb *quotaPool) compareAndExecute(version uint32, success, failure func()) bool {
 	qb.mu.Lock()
-	defer qb.mu.Unlock()
+	if version == qb.version {
-	if version == atomic.LoadUint32(&(qb.version)) {
 		success()
+		qb.mu.Unlock()
 		return true
 	}
 	failure()
+	qb.mu.Unlock()
 	return false
 }
 
-// acquire returns the channel on which available quota amounts are sent.
-func (qb *quotaPool) acquire() <-chan int {
-	return qb.c
-}
-
 // inFlow deals with inbound flow control
 type inFlow struct {
 	mu sync.Mutex

vendor/google.golang.org/grpc/transport/go16.go

@@ -0,0 +1,51 @@
+// +build go1.6,!go1.7
+
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package transport
+
+import (
+	"net"
+	"net/http"
+
+	"google.golang.org/grpc/codes"
+
+	"golang.org/x/net/context"
+)
+
+// dialContext connects to the address on the named network.
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
+}
+
+// ContextErr converts the error from context package into a StreamError.
+func ContextErr(err error) StreamError {
+	switch err {
+	case context.DeadlineExceeded:
+		return streamErrorf(codes.DeadlineExceeded, "%v", err)
+	case context.Canceled:
+		return streamErrorf(codes.Canceled, "%v", err)
+	}
+	return streamErrorf(codes.Internal, "Unexpected error from context packet: %v", err)
+}
+
+// contextFromRequest returns a background context.
+func contextFromRequest(r *http.Request) context.Context {
+	return context.Background()
+}

vendor/google.golang.org/grpc/transport/go17.go

@@ -0,0 +1,52 @@
+// +build go1.7
+
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package transport
+
+import (
+	"context"
+	"net"
+	"net/http"
+
+	"google.golang.org/grpc/codes"
+
+	netctx "golang.org/x/net/context"
+)
+
+// dialContext connects to the address on the named network.
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	return (&net.Dialer{}).DialContext(ctx, network, address)
+}
+
+// ContextErr converts the error from context package into a StreamError.
+func ContextErr(err error) StreamError {
+	switch err {
+	case context.DeadlineExceeded, netctx.DeadlineExceeded:
+		return streamErrorf(codes.DeadlineExceeded, "%v", err)
+	case context.Canceled, netctx.Canceled:
+		return streamErrorf(codes.Canceled, "%v", err)
+	}
+	return streamErrorf(codes.Internal, "Unexpected error from context packet: %v", err)
+}
+
+// contextFromRequest returns a context from the HTTP Request.
+func contextFromRequest(r *http.Request) context.Context {
+	return r.Context()
+}