From 3decf96ae8c6db456150ee0f99c621b3fa70fb3f Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Tue, 5 Jan 2021 17:03:24 +0800
Subject: [PATCH 01/24] gcs: compatible with old gcs bug

---
 pkg/storage/gcs.go | 55 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index 123434a99..b6a881add 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -7,12 +7,17 @@ import (
 	"io"
 	"io/ioutil"
 	"path"
+	"strings"
+	"time"
 
 	"cloud.google.com/go/storage"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/backup"
+	"github.com/pingcap/log"
 	"github.com/spf13/pflag"
+	"go.uber.org/zap"
 	"golang.org/x/oauth2/google"
+	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
 
 	berrors "github.com/pingcap/br/pkg/errors"
@@ -86,6 +91,13 @@ type gcsStorage struct {
 }
 
 func (s *gcsStorage) objectName(name string) string {
+	// to make it compatible with old version case 1
+	// see details https://github.com/pingcap/br/issues/675#issuecomment-753780742
+	ctx, cancel := context.WithTimeout(context.TODO(), 5 * time.Second)
+	defer cancel()
+	if _, err := s.bucket.Object(s.gcs.Prefix+name).Attrs(ctx); err != storage.ErrObjectNotExist {
+		return s.gcs.Prefix+name
+	}
 	return path.Join(s.gcs.Prefix, name)
 }
 
@@ -193,6 +205,49 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 	}
 
 	bucket := client.Bucket(gcs.Bucket)
+	// we need adjust prefix for gcs storage to make restore compatible with old version backup files.
+	// see details about case 2 at https://github.com/pingcap/br/issues/675#issuecomment-753780742
+	sstInPrefix := false
+	sstInPrefixSlash := false
+	it := bucket.Objects(ctx, &storage.Query{Prefix:gcs.Prefix})
+	for {
+		attrs, err := it.Next()
+		if err == iterator.Done {
+			break
+		}
+		if err != nil {
+			return nil, errors.Annotatef(berrors.ErrStorageUnknown, "Bucket(%q).Objects: %v", bucket, err)
+		}
+		if strings.HasPrefix(attrs.Name, "backup") {
+			log.Info("meta file found in prefix", zap.String("file", attrs.Name))
+			continue
+		}
+		if strings.HasSuffix(attrs.Name, ".sst") {
+			log.Info("sst file found in prefix", zap.String("file", attrs.Name))
+			sstInPrefix = true
+			break
+		}
+	}
+	it2 := bucket.Objects(ctx, &storage.Query{Prefix:gcs.Prefix + "//"})
+	for {
+		attrs, err := it2.Next()
+		if err == iterator.Done {
+			break
+		}
+		if err != nil {
+			return nil, errors.Annotatef(berrors.ErrStorageUnknown, "Bucket(%q).Objects: %v", bucket, err)
+		}
+		if strings.HasSuffix(attrs.Name, ".sst") {
+			log.Info("sst file found in prefix slash", zap.String("file", attrs.Name))
+			sstInPrefixSlash = true
+			break
+		}
+	}
+	if sstInPrefixSlash && !sstInPrefix {
+		// This is a old bug, but we must make it compatible.
+		// so we need find sst in slash directory
+		gcs.Prefix += "/"
+	}
 	if !opts.SkipCheckPath {
 		// check bucket exists
 		_, err = bucket.Attrs(ctx)

From 1333e9e6c82e6d49beebe784c37f2c9971403245 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Tue, 5 Jan 2021 17:21:23 +0800
Subject: [PATCH 02/24] fix build

---
 pkg/storage/gcs.go | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index b6a881add..3b7a9fb5f 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -93,10 +93,10 @@ type gcsStorage struct {
 func (s *gcsStorage) objectName(name string) string {
 	// to make it compatible with old version case 1
 	// see details https://github.com/pingcap/br/issues/675#issuecomment-753780742
-	ctx, cancel := context.WithTimeout(context.TODO(), 5 * time.Second)
+	ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
 	defer cancel()
-	if _, err := s.bucket.Object(s.gcs.Prefix+name).Attrs(ctx); err != storage.ErrObjectNotExist {
-		return s.gcs.Prefix+name
+	if _, err := s.bucket.Object(s.gcs.Prefix + name).Attrs(ctx); err != storage.ErrObjectNotExist {
+		return s.gcs.Prefix + name
 	}
 	return path.Join(s.gcs.Prefix, name)
 }
@@ -209,7 +209,7 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 	// see details about case 2 at https://github.com/pingcap/br/issues/675#issuecomment-753780742
 	sstInPrefix := false
 	sstInPrefixSlash := false
-	it := bucket.Objects(ctx, &storage.Query{Prefix:gcs.Prefix})
+	it := bucket.Objects(ctx, &storage.Query{Prefix: gcs.Prefix})
 	for {
 		attrs, err := it.Next()
 		if err == iterator.Done {
@@ -228,7 +228,7 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 			break
 		}
 	}
-	it2 := bucket.Objects(ctx, &storage.Query{Prefix:gcs.Prefix + "//"})
+	it2 := bucket.Objects(ctx, &storage.Query{Prefix: gcs.Prefix + "//"})
 	for {
 		attrs, err := it2.Next()
 		if err == iterator.Done {

From 0e3beaf5d860e44f9dac34071d4bd1b19c5c0228 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Tue, 5 Jan 2021 19:56:29 +0800
Subject: [PATCH 03/24] address comment

---
 pkg/storage/gcs.go   | 10 +---------
 pkg/storage/parse.go | 20 ++++++++++++++------
 pkg/task/common.go   | 27 +++++++++++++++++++++++++++
 3 files changed, 42 insertions(+), 15 deletions(-)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index 3b7a9fb5f..df5477eb0 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -8,7 +8,6 @@ import (
 	"io/ioutil"
 	"path"
 	"strings"
-	"time"
 
 	"cloud.google.com/go/storage"
 	"github.com/pingcap/errors"
@@ -91,13 +90,6 @@ type gcsStorage struct {
 }
 
 func (s *gcsStorage) objectName(name string) string {
-	// to make it compatible with old version case 1
-	// see details https://github.com/pingcap/br/issues/675#issuecomment-753780742
-	ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
-	defer cancel()
-	if _, err := s.bucket.Object(s.gcs.Prefix + name).Attrs(ctx); err != storage.ErrObjectNotExist {
-		return s.gcs.Prefix + name
-	}
 	return path.Join(s.gcs.Prefix, name)
 }
 
@@ -246,7 +238,7 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 	if sstInPrefixSlash && !sstInPrefix {
 		// This is a old bug, but we must make it compatible.
 		// so we need find sst in slash directory
-		gcs.Prefix += "/"
+		gcs.Prefix += "//"
 	}
 	if !opts.SkipCheckPath {
 		// check bucket exists
diff --git a/pkg/storage/parse.go b/pkg/storage/parse.go
index 42a50cdf4..c49ef4ced 100644
--- a/pkg/storage/parse.go
+++ b/pkg/storage/parse.go
@@ -22,18 +22,26 @@ type BackendOptions struct {
 	GCS GCSBackendOptions `json:"gcs" toml:"gcs"`
 }
 
+// ParseRawURL parse raw url to url object.
+func ParseRawURL(rawURL string) (*url.URL, error) {
+	// https://github.com/pingcap/br/issues/603
+	// In aws the secret key may contain '/+=' and '+' has a special meaning in URL.
+	// Replace "+" by "%2B" here to avoid this problem.
+	rawURL = strings.ReplaceAll(rawURL, "+", "%2B")
+	u, err := url.Parse(rawURL)
+	if err != nil {
+		return nil, errors.Trace(err)
+	}
+	return u, nil
+}
+
 // ParseBackend constructs a structured backend description from the
 // storage URL.
 func ParseBackend(rawURL string, options *BackendOptions) (*backup.StorageBackend, error) {
 	if len(rawURL) == 0 {
 		return nil, errors.Annotate(berrors.ErrStorageInvalidConfig, "empty store is not allowed")
 	}
-
-	// https://github.com/pingcap/br/issues/603
-	// In aws the secret key may contain '/+=' and '+' has a special meaning in URL.
-	// Replace "+" by "%2B" here to avoid this problem.
-	rawURL = strings.ReplaceAll(rawURL, "+", "%2B")
-	u, err := url.Parse(rawURL)
+	u, err := ParseRawURL(rawURL)
 	if err != nil {
 		return nil, errors.Trace(err)
 	}
diff --git a/pkg/task/common.go b/pkg/task/common.go
index 0a0a4841c..e4b5ccae1 100644
--- a/pkg/task/common.go
+++ b/pkg/task/common.go
@@ -7,9 +7,11 @@ import (
 	"crypto/tls"
 	"fmt"
 	"net/url"
+	filepath "path"
 	"strings"
 	"time"
 
+	gcs "cloud.google.com/go/storage"
 	"github.com/gogo/protobuf/proto"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/backup"
@@ -405,6 +407,25 @@ func ReadBackupMeta(
 	}
 	metaData, err := s.Read(ctx, fileName)
 	if err != nil {
+		if gcsObjectNotFound(err) {
+			// change gcs://bucket/abc/def to gcs://bucket/abc and read defbackupmeta
+			parsedURL, err := storage.ParseRawURL(cfg.Storage)
+			if err != nil {
+				return nil, nil, nil, errors.Trace(err)
+			}
+			newPrefix, file := filepath.Split(parsedURL.Path)
+			newFileName := file + fileName
+			cfg.Storage = strings.ReplaceAll(cfg.Storage, parsedURL.Path, newPrefix)
+			_, s, err := GetStorage(ctx, cfg)
+			if err != nil {
+				return nil, nil, nil, errors.Trace(err)
+			}
+			log.Info("retry load metadata in gcs", zap.String("newPrefix", newPrefix), zap.String("newFileName", newFileName))
+			metaData, err = s.Read(ctx, newFileName)
+			if err != nil {
+				return nil, nil, nil, errors.Trace(err)
+			}
+		}
 		return nil, nil, nil, errors.Annotate(err, "load backupmeta failed")
 	}
 	backupMeta := &backup.BackupMeta{}
@@ -477,3 +498,9 @@ func normalizePDURL(pd string, useTLS bool) (string, error) {
 	}
 	return pd, nil
 }
+
+// check whether it's a bug before #647, to solve case #1
+// see details https://github.com/pingcap/br/issues/675#issuecomment-753780742
+func gcsObjectNotFound(err error) bool {
+	return errors.Cause(err) == gcs.ErrObjectNotExist
+}

From 01affc1f08cfec7e6fbb9f3672f7af661a173789 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Wed, 6 Jan 2021 16:44:54 +0800
Subject: [PATCH 04/24] update go mod

---
 go.mod1               |  4 ++--
 tests/br_gcs/run.sh   | 30 ++++++++++++++++++++++++++++++
 tests/br_gcs/workload | 12 ++++++++++++
 3 files changed, 44 insertions(+), 2 deletions(-)
 create mode 100755 tests/br_gcs/run.sh
 create mode 100644 tests/br_gcs/workload

diff --git a/go.mod1 b/go.mod1
index bf243a4dd..270c07e8a 100644
--- a/go.mod1
+++ b/go.mod1
@@ -3,7 +3,7 @@ module github.com/pingcap/br
 go 1.13
 
 require (
-	cloud.google.com/go/storage v1.6.0
+	cloud.google.com/go/storage v1.11.0
 	github.com/aws/aws-sdk-go v1.35.3
 	github.com/cheggaaa/pb/v3 v3.0.4
 	github.com/cheynewallace/tabby v1.1.0
@@ -35,6 +35,6 @@ require (
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
 	google.golang.org/api v0.22.0
-	google.golang.org/grpc v1.27.1
+	google.golang.org/grpc v1.29.1
 	sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0
 )
diff --git a/tests/br_gcs/run.sh b/tests/br_gcs/run.sh
new file mode 100755
index 000000000..d0354e9c9
--- /dev/null
+++ b/tests/br_gcs/run.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+#
+# Copyright 2020 PingCAP, Inc.
+#
+# 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,
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eux
+DB="$TEST_NAME"
+TABLE="usertable"
+DB_COUNT=3
+
+# start the s3 server
+export GCS_ENDPOINT=127.0.0.1:24927
+rm -rf "$TEST_DIR/$DB"
+mkdir -p "$TEST_DIR/$DB"
+# start gcs-server
+# Fill in the database
+for i in $(seq $DB_COUNT); do
+    run_sql "CREATE DATABASE $DB${i};"
+    go-ycsb load mysql -P tests/$TEST_NAME/workload -p mysql.host=$TIDB_IP -p mysql.port=$TIDB_PORT -p mysql.user=root -p mysql.db=$DB${i}
+done
diff --git a/tests/br_gcs/workload b/tests/br_gcs/workload
new file mode 100644
index 000000000..19336335e
--- /dev/null
+++ b/tests/br_gcs/workload
@@ -0,0 +1,12 @@
+recordcount=5000
+operationcount=0
+workload=core
+
+readallfields=true
+
+readproportion=0
+updateproportion=0
+scanproportion=0
+insertproportion=0
+
+requestdistribution=uniform

From 356d2390f9d79f71c65d425c78e9c13cbd2185ec Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Wed, 6 Jan 2021 17:23:12 +0800
Subject: [PATCH 05/24] update go mod

---
 go.mod1 |  10 +++---
 go.sum1 | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 111 insertions(+), 4 deletions(-)

diff --git a/go.mod1 b/go.mod1
index 270c07e8a..2ee8d25c9 100644
--- a/go.mod1
+++ b/go.mod1
@@ -3,7 +3,7 @@ module github.com/pingcap/br
 go 1.13
 
 require (
-	cloud.google.com/go/storage v1.11.0
+	cloud.google.com/go/storage v1.12.0
 	github.com/aws/aws-sdk-go v1.35.3
 	github.com/cheggaaa/pb/v3 v3.0.4
 	github.com/cheynewallace/tabby v1.1.0
@@ -32,9 +32,11 @@ require (
 	go.etcd.io/etcd v0.5.0-alpha.5.0.20200824191128-ae9734ed278b
 	go.uber.org/multierr v1.6.0
 	go.uber.org/zap v1.16.0
-	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
+	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
 	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
-	google.golang.org/api v0.22.0
-	google.golang.org/grpc v1.29.1
+	google.golang.org/api v0.32.0
+	google.golang.org/grpc v1.32.0
 	sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0
 )
+
+replace google.golang.org/grpc v1.32.0 => google.golang.org/grpc v1.29.0
diff --git a/go.sum1 b/go.sum1
index 33017a5ce..8459fcf3a 100644
--- a/go.sum1
+++ b/go.sum1
@@ -12,10 +12,19 @@ cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gc
 cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
 cloud.google.com/go v0.53.0 h1:MZQCQQaRwOrAcuKjiHWHrgKykt4fZyuwF2dtiG3fGW8=
 cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.64.0 h1:xVP3LPvMjGT4J0a55y02Gw5y/dkY/rxGz58sfK1jqIo=
+cloud.google.com/go v0.64.0/go.mod h1:xfORb36jGvE+6EexW71nMEtL025s3x6xvuYUKM4JLv4=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0 h1:xE3CPsOgttP4ACBePh79zTKALtXwn/Edhcr16R5hMWU=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
 cloud.google.com/go/bigtable v1.2.0/go.mod h1:JcVAOl45lrTmQfLj7T6TxyMzIN/3FGGcFm+2xVAli2o=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/datastore v1.1.0 h1:/May9ojXjRkPBNVrq+oWLqmWCkr4OU5uRY29bu0mRyQ=
@@ -24,11 +33,16 @@ cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2k
 cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
 cloud.google.com/go/pubsub v1.2.0 h1:Lpy6hKgdcl7a3WGSfJIFmxmcdjSpP6OmBEfcOv1Y680=
 cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
+cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
 cloud.google.com/go/spanner v1.1.0/go.mod h1:TzTaF9l2ZY2CIetNvVpUu6ZQy8YEOtzB6ICa5EwYjL0=
 cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
 cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
 cloud.google.com/go/storage v1.6.0 h1:UDpwYIwla4jHGzZJaEJYx1tOejbgSoNqsAfHAUYe2r8=
 cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
+cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
+cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+cloud.google.com/go/storage v1.11.0 h1:bSLyzhbGjLMYxCratCDRSSH7+xRGpNApTBmowDUFGLk=
+cloud.google.com/go/storage v1.11.0/go.mod h1:/PAbprKS+5msVYogBmczjWalDXnQ9mr64yEq9YnyPeo=
 collectd.org v0.3.0/go.mod h1:A/8DzQBkF6abtvrT2j/AU/4tiBgJWYyh0y/oB/4MlWE=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/AndreasBriese/bbloom v0.0.0-20180913140656-343706a395b7/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
@@ -155,6 +169,7 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5P
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cloudflare/golz4 v0.0.0-20150217214814-ef862a3cdc58/go.mod h1:EOBUe0h4xcZ5GoxqC5SDxFQ8gwyZPKQoEzownBlhI80=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cockroachdb/apd v1.1.0/go.mod h1:8Sl8LxpKi29FqWXR16WEFZRNSz3SoPzUzeMeY4+DwBQ=
 github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa h1:OaNxuTZr7kxeODyLWsRMC+OD03aFUH+mW6r2d+MWa5Y=
 github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
@@ -248,6 +263,7 @@ github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385/go.mod h1:0vRUJqYpeSZi
 github.com/elazarl/go-bindata-assetfs v1.0.0/go.mod h1:v+YaWX3bdea5J/mo8dSETolEo7R71Vk1u8bnjau5yw4=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5/go.mod h1:a2zkGnVExMxdzMo3M0Hi/3sEU+cWnZpSni0O6/Yb/P0=
 github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51/go.mod h1:Yg+htXGokKKdzcwhuNDwVvN+uBxDGXJ7G/VN1d8fa64=
@@ -356,6 +372,7 @@ github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfb
 github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
 github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.4 h1:l75CXGRSwbaYNpl/Z2X1XIIAMSCquvXgpVZDhwEIJsc=
 github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
@@ -367,6 +384,15 @@ github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/golang/protobuf v1.3.4 h1:87PNWwrRvUSnqS4dlcBU/ftvOIBep4sYuBLlh6rX2wk=
 github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
+github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
+github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
+github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
+github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
+github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
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 github.com/golang/snappy v0.0.0-20170215233205-553a64147049/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
@@ -380,18 +406,27 @@ github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5a
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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+github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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 github.com/google/go-cmp v0.5.2 h1:X2ev0eStA3AbceY54o37/0PQ/UWqKEiiO2dKL5OPaFM=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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 github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
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 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/google/shlex v0.0.0-20181106134648-c34317bd91bf/go.mod h1:RpwtwJQFrIEPstU94h88MWPXP2ektJZ8cZ0YntAmXiE=
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@@ -962,6 +997,8 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opencensus.io v0.22.4 h1:LYy1Hy3MJdrCdMwwzxA/dRok4ejH+RwNGbuoD9fCjto=
+go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
@@ -1067,6 +1104,7 @@ golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR
 golang.org/x/net v0.0.0-20190611141213-3f473d35a33a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -1079,8 +1117,13 @@ golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200421231249-e086a090c8fd/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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+golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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 golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20200813134508-3edf25e44fcc/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
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 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -1095,6 +1138,7 @@ golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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@@ -1140,10 +1184,17 @@ golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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+golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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+golang.org/x/sys v0.0.0-20200331124033-c3d80250170d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -1205,17 +1256,32 @@ golang.org/x/tools v0.0.0-20200207183749-b753a1ba74fa/go.mod h1:TB2adYChydJhpapK
 golang.org/x/tools v0.0.0-20200212150539-ea181f53ac56/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200224181240-023911ca70b2/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200225230052-807dcd883420/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200227222343-706bc42d1f0d/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200304193943-95d2e580d8eb/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
+golang.org/x/tools v0.0.0-20200312045724-11d5b4c81c7d/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
 golang.org/x/tools v0.0.0-20200325010219-a49f79bcc224/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
 golang.org/x/tools v0.0.0-20200325203130-f53864d0dba1/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
+golang.org/x/tools v0.0.0-20200331025713-a30bf2db82d4/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
 golang.org/x/tools v0.0.0-20200422205258-72e4a01eba43/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200501065659-ab2804fb9c9d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200512131952-2bc93b1c0c88/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200515010526-7d3b6ebf133d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200527183253-8e7acdbce89d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200609164405-eb789aa7ce50/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
+golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
+golang.org/x/tools v0.0.0-20200817023811-d00afeaade8f/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200820010801-b793a1359eac h1:DugppSxw0LSF8lcjaODPJZoDzq0ElTGskTst3ZaBkHI=
 golang.org/x/tools v0.0.0-20200820010801-b793a1359eac/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
+golang.org/x/tools v0.0.0-20200827163409-021d7c6f1ec3 h1:OjYQxZBKJFs+sJbHkvSGIKNMkZXDJQ9JsMpebGhkafI=
+golang.org/x/tools v0.0.0-20200827163409-021d7c6f1ec3/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.0.0-20180816165407-929014505bf4/go.mod h1:Y+Yx5eoAFn32cQvJDxZx5Dpnq+c3wtXuadVZAcxbbBo=
 gonum.org/v1/gonum v0.0.0-20181121035319-3f7ecaa7e8ca/go.mod h1:Y+Yx5eoAFn32cQvJDxZx5Dpnq+c3wtXuadVZAcxbbBo=
 gonum.org/v1/gonum v0.6.0/go.mod h1:9mxDZsDKxgMAuccQkewq682L+0eCu4dCN2yonUJTCLU=
@@ -1231,8 +1297,15 @@ google.golang.org/api v0.14.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsb
 google.golang.org/api v0.15.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/api v0.17.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
 google.golang.org/api v0.18.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
+google.golang.org/api v0.19.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
+google.golang.org/api v0.20.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
 google.golang.org/api v0.22.0 h1:J1Pl9P2lnmYFSJvgs70DKELqHNh8CNWXPbud4njEE2s=
 google.golang.org/api v0.22.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
+google.golang.org/api v0.24.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
+google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
+google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
+google.golang.org/api v0.30.0 h1:yfrXXP61wVuLb0vBcG6qaOoIoqYEzOQS8jum51jkv2w=
+google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -1240,6 +1313,8 @@ google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww
 google.golang.org/appengine v1.6.2/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/appengine v1.6.5 h1:tycE03LOZYQNhDpS27tcQdAzLCVMaj7QT2SXxebnpCM=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
+google.golang.org/appengine v1.6.6 h1:lMO5rYAqUxkmaj76jAkRUvt5JZgFymx/+Q5Mzfivuhc=
+google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20181004005441-af9cb2a35e7f/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@@ -1265,6 +1340,20 @@ google.golang.org/genproto v0.0.0-20200204135345-fa8e72b47b90/go.mod h1:GmwEX6Z4
 google.golang.org/genproto v0.0.0-20200212174721-66ed5ce911ce/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63 h1:YzfoEYWbODU5Fbt37+h7X16BWQbad7Q4S6gclTKFXM8=
 google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200228133532-8c2c7df3a383/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200305110556-506484158171/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
+google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20200815001618-f69a88009b70/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20200827165113-ac2560b5e952 h1:y857ZwFJ60XFsJ00vOc7ouVMLOZp7C+7h03pESkILFY=
+google.golang.org/genproto v0.0.0-20200827165113-ac2560b5e952/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v0.0.0-20180607172857-7a6a684ca69e/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
@@ -1278,6 +1367,22 @@ google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.1 h1:zvIju4sqAGvwKspUQOhwnpcqSbzi7/H6QomNNjTL4sk=
 google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
+google.golang.org/grpc v1.29.0 h1:2pJjwYOdkZ9HlN4sWRYBg9ttH5bCOlsueaM+b/oYjwo=
+google.golang.org/grpc v1.29.0/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
+google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
+google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
+google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
+google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
+google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 gopkg.in/VividCortex/ewma.v1 v1.1.1/go.mod h1:TekXuFipeiHWiAlO1+wSS23vTcyFau5u3rxXUSXj710=
 gopkg.in/alecthomas/gometalinter.v2 v2.0.12/go.mod h1:NDRytsqEZyolNuAgTzJkZMkSQM7FIKyzVzGhjB/qfYo=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=

From 1d8b2d72a316e73e1775233b8d98ae3eb8e60710 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Thu, 7 Jan 2021 11:28:25 +0800
Subject: [PATCH 06/24] fix test

---
 pkg/storage/gcs.go | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index df5477eb0..c16b36031 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -18,8 +18,6 @@ import (
 	"golang.org/x/oauth2/google"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
-
-	berrors "github.com/pingcap/br/pkg/errors"
 )
 
 const (
@@ -161,21 +159,26 @@ func (s *gcsStorage) CreateUploader(ctx context.Context, name string) (Uploader,
 }
 
 func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOptions) (*gcsStorage, error) {
-	var clientOps []option.ClientOption
+	var (
+		err error
+		creds *google.Credentials
+		clientOps []option.ClientOption
+	)
 	if gcs.CredentialsBlob == "" {
-		creds, err := google.FindDefaultCredentials(ctx, storage.ScopeReadWrite)
+		creds, err = google.FindDefaultCredentials(ctx, storage.ScopeReadWrite)
 		if err != nil {
-			return nil, errors.Annotatef(berrors.ErrStorageInvalidConfig, "%v Or you should provide '--gcs.credentials_file'", err)
+			log.Warn("you should provide '--gcs.credentials_file'", zap.Error(err))
 		}
 		if opts.SendCredentials {
 			if len(creds.JSON) > 0 {
 				gcs.CredentialsBlob = string(creds.JSON)
 			} else {
-				return nil, errors.Annotate(berrors.ErrStorageInvalidConfig,
-					"You should provide '--gcs.credentials_file' when '--send-credentials-to-tikv' is true")
+				log.Warn("You should provide '--gcs.credentials_file' when '--send-credentials-to-tikv' is true")
 			}
 		}
-		clientOps = append(clientOps, option.WithCredentials(creds))
+		if creds != nil {
+			clientOps = append(clientOps, option.WithCredentials(creds))
+		}
 	} else {
 		clientOps = append(clientOps, option.WithCredentialsJSON([]byte(gcs.GetCredentialsBlob())))
 	}
@@ -208,7 +211,8 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 			break
 		}
 		if err != nil {
-			return nil, errors.Annotatef(berrors.ErrStorageUnknown, "Bucket(%q).Objects: %v", bucket, err)
+			log.Warn("failed to list objects on gcs, will use default value for `prefix`", zap.Error(err))
+			break
 		}
 		if strings.HasPrefix(attrs.Name, "backup") {
 			log.Info("meta file found in prefix", zap.String("file", attrs.Name))
@@ -227,7 +231,8 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 			break
 		}
 		if err != nil {
-			return nil, errors.Annotatef(berrors.ErrStorageUnknown, "Bucket(%q).Objects: %v", bucket, err)
+			log.Warn("failed to list objects on gcs, will use default value for `prefix`", zap.Error(err))
+			break
 		}
 		if strings.HasSuffix(attrs.Name, ".sst") {
 			log.Info("sst file found in prefix slash", zap.String("file", attrs.Name))

From f99c53e1f771ebf40b5f0656108eb4c3610011b4 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Thu, 7 Jan 2021 14:58:17 +0800
Subject: [PATCH 07/24] add integration test for gcs

---
 Makefile                |  1 +
 tests/br_gcs/oauth.py   |  7 ++++
 tests/br_gcs/run.sh     | 76 +++++++++++++++++++++++++++++++++++++++--
 tests/download_tools.sh |  6 ++++
 4 files changed, 88 insertions(+), 2 deletions(-)
 create mode 100644 tests/br_gcs/oauth.py

diff --git a/Makefile b/Makefile
index 082b6a5c4..0b44a3e02 100644
--- a/Makefile
+++ b/Makefile
@@ -84,6 +84,7 @@ bins:
 	@which bin/tiflash
 	@which bin/libtiflash_proxy.so
 	@which bin/cdc
+	@which bin/fake-gcs-server
 	if [ ! -d bin/flash_cluster_manager ]; then echo "flash_cluster_manager not exist"; exit 1; fi
 
 tools:
diff --git a/tests/br_gcs/oauth.py b/tests/br_gcs/oauth.py
new file mode 100644
index 000000000..0eefcdb61
--- /dev/null
+++ b/tests/br_gcs/oauth.py
@@ -0,0 +1,7 @@
+from flask import Flask
+
+app = Flask(__name__)
+
+@app.route('/oauth/token', methods=['GET', 'POST'])
+def oauth():
+    return '{"access_token": "ok", "token_type":"service_account", "expires_in":3600}'
diff --git a/tests/br_gcs/run.sh b/tests/br_gcs/run.sh
index d0354e9c9..08183ba95 100755
--- a/tests/br_gcs/run.sh
+++ b/tests/br_gcs/run.sh
@@ -18,8 +18,27 @@ DB="$TEST_NAME"
 TABLE="usertable"
 DB_COUNT=3
 
-# start the s3 server
-export GCS_ENDPOINT=127.0.0.1:24927
+GCS_HOST="localhost"
+GCS_PORT=10808
+BUCKET="test"
+
+bin/fake-gcs-server -scheme http -host $GCS_HOST -port $GCS_PORT -backend memory &
+GCS_ID=$!
+i=0
+while ! curl -o /dev/null -v -s "http://$GCS_HOST:$GCS_PORT/"; do
+    i=$(($i+1))
+    if [ $i -gt 7 ]; then
+        echo 'Failed to start gcs-server'
+        exit 1
+    fi
+    sleep 2
+done
+
+stop_gcs() {
+    kill -2 $GCS_ID
+}
+trap stop_gcs EXIT
+
 rm -rf "$TEST_DIR/$DB"
 mkdir -p "$TEST_DIR/$DB"
 # start gcs-server
@@ -28,3 +47,56 @@ for i in $(seq $DB_COUNT); do
     run_sql "CREATE DATABASE $DB${i};"
     go-ycsb load mysql -P tests/$TEST_NAME/workload -p mysql.host=$TIDB_IP -p mysql.port=$TIDB_PORT -p mysql.user=root -p mysql.db=$DB${i}
 done
+
+# create gcs bucket
+curl -XPOST http://$GCS_HOST:$GCS_PORT/storage/v1/b -d '{"name":"$BUCKET"}'
+
+# create gcs credentials
+# we need start a oauth server or gcs client will failed to handle request.
+export GOOGLE_APPLICATION_CREDENTIALS=$(cat <<- EOF
+{
+  "type": "service_account",
+  "private_key": "-----BEGIN PRIVATE KEY-----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\nyHLBMOlXdpn0gZ4rwoIQgzD9\n-----END PRIVATE KEY-----\n",
+  "client_email": "test@email.com",
+  "token_uri": "http://localhost:5000/oauth/token"
+}
+EOF)
+
+# start oauth server
+FLASK_APP=tests/$TEST_NAME/oauth.py flask run
+
+for i in $(seq $DB_COUNT); do
+  row_count_ori[${i}]=$(run_sql "SELECT COUNT(*) FROM $DB${i}.$TABLE;" | awk '/COUNT/{print $2}')
+done
+
+# backup full
+echo "backup start..."
+run_br --pd $PD_ADDR backup full -s "gcs://$BUCKET/$DB?endpoint=http://$GCS_HOST:$GCS_PORT/storage/v1/"
+
+for i in $(seq $DB_COUNT); do
+    run_sql "DROP DATABASE $DB${i};"
+done
+
+# restore full
+echo "restore start..."
+run_br restore full -s "gcs://$BUCKET/$DB?" --pd $PD_ADDR --gcs.endpoint="http://$GCS_HOST:$GCS_PORT/storage/v1/"
+
+for i in $(seq $DB_COUNT); do
+    row_count_new[${i}]=$(run_sql "SELECT COUNT(*) FROM $DB${i}.$TABLE;" | awk '/COUNT/{print $2}')
+done
+
+fail=false
+for i in $(seq $DB_COUNT); do
+    if [ "${row_count_ori[i]}" != "${row_count_new[i]}" ];then
+        fail=true
+        echo "TEST: [$TEST_NAME] fail on database $DB${i}"
+    fi
+    echo "database $DB${i} [original] row count: ${row_count_ori[i]}, [after br] row count: ${row_count_new[i]}"
+done
+
+if $fail; then
+    echo "TEST: [$TEST_NAME] failed!"
+    exit 1
+else
+    echo "TEST: [$TEST_NAME] successed!"
+fi
diff --git a/tests/download_tools.sh b/tests/download_tools.sh
index 32e917be7..03533906c 100755
--- a/tests/download_tools.sh
+++ b/tests/download_tools.sh
@@ -65,6 +65,12 @@ if [ ! -e "$BIN/minio" ]; then
     chmod a+x "$BIN/minio"
 fi
 
+if [ ! -e "$BIN/fake-gcs-server" ]; then
+    echo "Downloading fake-gcs-server..."
+    curl -L -f -o "$BIN/fake-gcs-server" "http://lease.pingcap.org/fake-gcs-server"
+    chmod a+x "$BIN/fake-gcs-server"
+fi
+
 if [ ! -e "$BIN/cdc" ]; then
     echo "Downloading cdc..."
     curl -L -f -o "$BIN/cdc.tar.gz" "https://download.pingcap.org/ticdc-nightly-linux-amd64.tar.gz"

From 59813523acb8287b5cdf99b1315f0f2c64814a94 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Thu, 7 Jan 2021 19:24:14 +0800
Subject: [PATCH 08/24] fix gcs test

---
 tests/br_gcs/run.sh | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/tests/br_gcs/run.sh b/tests/br_gcs/run.sh
index 08183ba95..284695fff 100755
--- a/tests/br_gcs/run.sh
+++ b/tests/br_gcs/run.sh
@@ -34,8 +34,13 @@ while ! curl -o /dev/null -v -s "http://$GCS_HOST:$GCS_PORT/"; do
     sleep 2
 done
 
+# start oauth server
+FLASK_APP=tests/$TEST_NAME/oauth.py flask run &
+OAUTH_ID=$!
+
 stop_gcs() {
     kill -2 $GCS_ID
+    kill -2 $OAUTH_ID
 }
 trap stop_gcs EXIT
 
@@ -48,12 +53,9 @@ for i in $(seq $DB_COUNT); do
     go-ycsb load mysql -P tests/$TEST_NAME/workload -p mysql.host=$TIDB_IP -p mysql.port=$TIDB_PORT -p mysql.user=root -p mysql.db=$DB${i}
 done
 
-# create gcs bucket
-curl -XPOST http://$GCS_HOST:$GCS_PORT/storage/v1/b -d '{"name":"$BUCKET"}'
-
 # create gcs credentials
 # we need start a oauth server or gcs client will failed to handle request.
-export GOOGLE_APPLICATION_CREDENTIALS=$(cat <<- EOF
+KEY=$(cat <<- EOF
 {
   "type": "service_account",
   "private_key": "-----BEGIN PRIVATE KEY-----\nMIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCT524vzG7uEVtX\nojcHbyQzVwlcaGkg1DWWLT+SufD08UYF0bsfcD0Etrtzo4ggwdxJQy5ygl3TNlcD\nKdelWbVyGfg9/sNB1RDlZYbQb0LVLHKjkVs7JyJsxrLk2e6NqD9ajwTEJUcLAQkj\nxlCcIi51beqrIRlvHjbtGwet/dNnRLSZf+i9SHvB2j64+RVYdnyf/IiLBvYyu7hF\nT6VjlljdbwC4TZ2jpfDL8nHRTiDiV+CX3/iH8MlMEOSM30AO5MPNVCZLlTA9W24a\nKi4NPBBlJLvG2mQELYdbhdM64iMvbPkDRtajJD6ogPB7wUoWbtSke5oOJNyV1HNt\nn91JH/dlAgMBAAECggEAQBwve2GSbfgxD0Xds4e9+dEO2jLZ6uSBS9TWOywFIa9Z\nqlkUUtbMZDgu/buTXJubeFg6EGGo+M4TnmfrNR2zFD/khj7hdS49kinVa5Dmt895\n66Osl3HprpvcXG2IxXd56q+Woc0Ew+TRiOPD+kGowLcB4ubIhw1iQpmWVRlyos6Q\nyvHssolrqOkRK9+1asixgow2Y15HtpXFN3XDIVj3gfdN1Zg80S66bTap1DS+dkJH\nSMgEZRilAjUGzbroqvZCiymlIJP5Jj5L5Wy8Qp/k1ixK10oaPgwvdmwXHX/DZ0vC\nT6XwpIaCYd3/XUWBHvrmQHFucWVPISZRi5WidggzuwKBgQDNHrxKaDrxcrV5Ncgu\npQrtQvTsIUCJGMo5m30X0Ac5CsIssOoQHdtEQW1ehJ8DtJRRb9rdWc4aelXsDUr+\no2m1zyZzM6S7IO2YhGDAo7Uu3fy1r33qYAt6uS/nHaJBpsKcyqqK+0wPDikdPLLx\nBBWZHF6WoswDEUVLQa/hHgpjPwKBgQC4l2/6xShNoobivzk8AE/Acq7PazA8gu4K\nY0UghTBlAst4RvBTURYZ2V3uw0S2FbfwL0/snHhNWZl5XjBX/H9oQmLri5qGOOpf\n9A11p5kd0x1mHDgTm/k7EgoskdXGB5NqXIB7l/3UI8Sk2N1PzHwyJJYfaB+EWTs8\n+LVy99VQWwKBgQCilRwVtiwSOSPSYWi8YCEbEpljmK+4eye/JZmviDpRYk+qcMf1\n4lRr85gm9OO9YiK1sf0+ufH9Vr5IDflFgG1HqFwHsAWANYdd/n9Z8eior1ehAurB\nHUO8EJEBlaGIfA+Bi7pF0w3kWQsJm5USKHSeGbh3ma4vOD8+eWBZBSCirQKBgQCe\n1uEq/sChnXtIXpgXg4Uc6xJ1tZy6VUgUdDulsjZklTUU+KYQa7QC5kKoFCtqK+It\nseiqiDIVDUa9Y0liTQotYwLQAT8kxJEZpF54oZFmUqX3mcy/QvYB2JIcrBkx4I7/\ndT2yHKX1CBpMZ7h41FMCquzrdaO5NTd+Td2FYrGSBQKBgEBnAerHh/NafYlVumlS\nVgouR9IketTegyEyntVyEvENx8OA5ZLMywCIKbPMFZgPR0RgDpyDxKauCU2E09e/\nboN76UOuOg11fknJh7vFbUbzM6BXvXVOTyX9ZtZBQcd5Y3tV+tYD1tHUgurGYWb+\nyHLBMOlXdpn0gZ4rwoIQgzD9\n-----END PRIVATE KEY-----\n",
@@ -62,8 +64,12 @@ export GOOGLE_APPLICATION_CREDENTIALS=$(cat <<- EOF
 }
 EOF)
 
-# start oauth server
-FLASK_APP=tests/$TEST_NAME/oauth.py flask run
+echo $KEY > "tests/$TEST_NAME/config.json"
+# create test CREDENTIALS for gcs oauth
+export GOOGLE_APPLICATION_CREDENTIALS="tests/$TEST_NAME/config.json"
+
+# create gcs bucket
+curl -XPOST http://$GCS_HOST:$GCS_PORT/storage/v1/b -d '{"name":"test"}'
 
 for i in $(seq $DB_COUNT); do
   row_count_ori[${i}]=$(run_sql "SELECT COUNT(*) FROM $DB${i}.$TABLE;" | awk '/COUNT/{print $2}')

From a5abc46963f6a710a80a039558827903a1f1e79f Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 11:10:55 +0800
Subject: [PATCH 09/24] use forked gcs client go mod

---
 go.mod1 | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/go.mod1 b/go.mod1
index 2ee8d25c9..305b4fb02 100644
--- a/go.mod1
+++ b/go.mod1
@@ -13,7 +13,7 @@ require (
 	github.com/gogo/protobuf v1.3.1
 	github.com/golang/mock v1.4.4
 	github.com/google/btree v1.0.0
-	github.com/google/uuid v1.1.1
+	github.com/google/uuid v1.1.2
 	github.com/opentracing/opentracing-go v1.1.0
 	github.com/pingcap/check v0.0.0-20200212061837-5e12011dc712
 	github.com/pingcap/errors v0.11.5-0.20201126102027-b0a155152ca3
@@ -32,11 +32,14 @@ require (
 	go.etcd.io/etcd v0.5.0-alpha.5.0.20200824191128-ae9734ed278b
 	go.uber.org/multierr v1.6.0
 	go.uber.org/zap v1.16.0
-	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
+	golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5
 	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
-	google.golang.org/api v0.32.0
-	google.golang.org/grpc v1.32.0
+	google.golang.org/api v0.36.0
+	google.golang.org/grpc v1.34.0
 	sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0
 )
 
-replace google.golang.org/grpc v1.32.0 => google.golang.org/grpc v1.29.0
+replace (
+	cloud.google.com/go/storage => github.com/3pointer/google-cloud-go/storage fix_ep_scheme 
+	google.golang.org/grpc v1.34.0 => google.golang.org/grpc v1.29.0
+)

From 09fe24cd58435ab8764c54246a68380c3cf6efef Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 13:17:30 +0800
Subject: [PATCH 10/24] fix test

---
 go.mod1            |   5 +-
 go.sum1            | 185 +++++++++++++++------------------------------
 pkg/storage/gcs.go |   4 +-
 pkg/task/common.go |   2 +-
 4 files changed, 68 insertions(+), 128 deletions(-)

diff --git a/go.mod1 b/go.mod1
index 305b4fb02..cdc3b5162 100644
--- a/go.mod1
+++ b/go.mod1
@@ -40,6 +40,9 @@ require (
 )
 
 replace (
-	cloud.google.com/go/storage => github.com/3pointer/google-cloud-go/storage fix_ep_scheme 
+	cloud.google.com/go/storage => github.com/3pointer/google-cloud-go/storage v1.12.1-0.20210107115228-8b7680f50d0c
+	github.com/shirou/gopsutil => github.com/shirou/gopsutil v2.20.6-0.20200630091542-01afd763e6c0+incompatible
+
+	golang.org/x/sys => golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae
 	google.golang.org/grpc v1.34.0 => google.golang.org/grpc v1.29.0
 )
diff --git a/go.sum1 b/go.sum1
index 8459fcf3a..54756d103 100644
--- a/go.sum1
+++ b/go.sum1
@@ -7,44 +7,29 @@ cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxK
 cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
 cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
 cloud.google.com/go v0.49.0/go.mod h1:hGvAdzcWNbyuxS3nWhD7H2cIJxjRRTRLQVB0bdputVY=
-cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
 cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw=
 cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
-cloud.google.com/go v0.53.0 h1:MZQCQQaRwOrAcuKjiHWHrgKykt4fZyuwF2dtiG3fGW8=
-cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
-cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
 cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
-cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
 cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
-cloud.google.com/go v0.64.0 h1:xVP3LPvMjGT4J0a55y02Gw5y/dkY/rxGz58sfK1jqIo=
-cloud.google.com/go v0.64.0/go.mod h1:xfORb36jGvE+6EexW71nMEtL025s3x6xvuYUKM4JLv4=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
+cloud.google.com/go v0.74.0 h1:kpgPA77kSSbjSs+fWHkPTxQ6J5Z2Qkruo5jfXEkHxNQ=
+cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0 h1:xE3CPsOgttP4ACBePh79zTKALtXwn/Edhcr16R5hMWU=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
-cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
-cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
-cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
 cloud.google.com/go/bigtable v1.2.0/go.mod h1:JcVAOl45lrTmQfLj7T6TxyMzIN/3FGGcFm+2xVAli2o=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/datastore v1.1.0 h1:/May9ojXjRkPBNVrq+oWLqmWCkr4OU5uRY29bu0mRyQ=
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
 cloud.google.com/go/pubsub v1.2.0 h1:Lpy6hKgdcl7a3WGSfJIFmxmcdjSpP6OmBEfcOv1Y680=
 cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
-cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
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@@ -371,8 +356,6 @@ github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4er
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
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-github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
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@@ -393,6 +376,8 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
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 github.com/golang/snappy v0.0.0-20170215233205-553a64147049/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
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 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
@@ -406,27 +391,31 @@ github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5a
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 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.4.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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@@ -434,6 +423,8 @@ github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+
 github.com/google/uuid v1.1.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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+github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
+github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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@@ -479,6 +470,7 @@ github.com/hypnoglow/gormzap v0.3.0/go.mod h1:5Wom8B7Jl2oK0Im9hs6KQ+Kl92w4Y7gKCr
 github.com/iancoleman/strcase v0.0.0-20191112232945-16388991a334 h1:VHgatEHNcBFEB7inlalqfNqw65aNkM1lGX2yt3NmbS8=
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@@ -819,11 +811,8 @@ github.com/segmentio/kafka-go v0.1.0/go.mod h1:X6itGqS9L4jDletMsxZ7Dz+JFWxM6JHfP
 github.com/segmentio/kafka-go v0.2.0/go.mod h1:X6itGqS9L4jDletMsxZ7Dz+JFWxM6JHfPOCvTvk+EJo=
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@@ -977,6 +966,7 @@ github.com/yookoala/realpath v1.0.0/go.mod h1:gJJMA9wuX7AcqLy1+ffPatSCySA1FQ2S8Y
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/gopher-lua v0.0.0-20181031023651-12c4817b42c5/go.mod h1:aEV29XrmTYFr3CiRxZeGHpkvbwq+prZduBqMaascyCU=
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@@ -999,6 +989,8 @@ go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4 h1:LYy1Hy3MJdrCdMwwzxA/dRok4ejH+RwNGbuoD9fCjto=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opencensus.io v0.22.5 h1:dntmOdLpSpHlVqbW5Eay97DelsZHe+55D+xC6i0dDS0=
+go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
@@ -1059,7 +1051,6 @@ golang.org/x/exp v0.0.0-20191129062945-2f5052295587/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
-golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
 golang.org/x/exp v0.0.0-20200513190911-00229845015e h1:rMqLP+9XLy+LdbCXHjJHAmTfXCr93W7oruWA6Hq1Alc=
 golang.org/x/exp v0.0.0-20200513190911-00229845015e/go.mod h1:4M0jN8W1tt0AVLNr8HDosyJCDCDuyL9N9+3m7wDWgKw=
 golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81/go.mod h1:ux5Hcp/YLpHSI86hEcLt0YII63i6oz57MZXIpbrjZUs=
@@ -1077,6 +1068,8 @@ golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRu
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@@ -1086,6 +1079,8 @@ golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzB
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@@ -1112,26 +1107,30 @@ golang.org/x/net v0.0.0-20191002035440-2ec189313ef0/go.mod h1:z5CRVTTTmAJ677TzLL
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@@ -1315,6 +1255,8 @@ google.golang.org/appengine v1.6.5 h1:tycE03LOZYQNhDpS27tcQdAzLCVMaj7QT2SXxebnpC
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+google.golang.org/genproto v0.0.0-20201210142538-e3217bee35cc/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20210105202744-fe13368bc0e1 h1:Zk6zlGXdtYdcY5TL+VrbTfmifvk3VvsXopCpszsHPBA=
+google.golang.org/genproto v0.0.0-20210105202744-fe13368bc0e1/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v0.0.0-20180607172857-7a6a684ca69e/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
@@ -1370,8 +1305,10 @@ google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
 google.golang.org/grpc v1.29.0 h1:2pJjwYOdkZ9HlN4sWRYBg9ttH5bCOlsueaM+b/oYjwo=
 google.golang.org/grpc v1.29.0/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
-google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
 google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc v1.31.1/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index c16b36031..9c86c11f1 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -160,8 +160,8 @@ func (s *gcsStorage) CreateUploader(ctx context.Context, name string) (Uploader,
 
 func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOptions) (*gcsStorage, error) {
 	var (
-		err error
-		creds *google.Credentials
+		err       error
+		creds     *google.Credentials
 		clientOps []option.ClientOption
 	)
 	if gcs.CredentialsBlob == "" {
diff --git a/pkg/task/common.go b/pkg/task/common.go
index e4b5ccae1..27c69f920 100644
--- a/pkg/task/common.go
+++ b/pkg/task/common.go
@@ -416,7 +416,7 @@ func ReadBackupMeta(
 			newPrefix, file := filepath.Split(parsedURL.Path)
 			newFileName := file + fileName
 			cfg.Storage = strings.ReplaceAll(cfg.Storage, parsedURL.Path, newPrefix)
-			_, s, err := GetStorage(ctx, cfg)
+			_, s, err = GetStorage(ctx, cfg)
 			if err != nil {
 				return nil, nil, nil, errors.Trace(err)
 			}

From c050757fe98b31aa48927d20bfaf84b46acb7da2 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 16:29:18 +0800
Subject: [PATCH 11/24] fix test

---
 pkg/storage/gcs.go  | 11 +++++++++--
 tests/br_gcs/run.sh |  3 ++-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index 9c86c11f1..e31b21417 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -113,8 +113,15 @@ func (s *gcsStorage) Read(ctx context.Context, name string) ([]byte, error) {
 	}
 	defer rc.Close()
 
-	b := make([]byte, rc.Attrs.Size)
-	_, err = io.ReadFull(rc, b)
+	size := rc.Attrs.Size
+	var b []byte
+	if size < 0 {
+		// happened when using fake-gcs-server in integration test
+		b, err = ioutil.ReadAll(rc)
+	} else {
+		b = make([]byte, size)
+		_, err = io.ReadFull(rc, b)
+	}
 	return b, errors.Trace(err)
 }
 
diff --git a/tests/br_gcs/run.sh b/tests/br_gcs/run.sh
index 284695fff..f382ac67a 100755
--- a/tests/br_gcs/run.sh
+++ b/tests/br_gcs/run.sh
@@ -22,7 +22,8 @@ GCS_HOST="localhost"
 GCS_PORT=10808
 BUCKET="test"
 
-bin/fake-gcs-server -scheme http -host $GCS_HOST -port $GCS_PORT -backend memory &
+# we need set public-host for download file, or it will 404 when using client to read.
+bin/fake-gcs-server -scheme http -host $GCS_HOST -port $GCS_PORT -backend memory -public-host $GCS_HOST:$GCS_PORT &
 GCS_ID=$!
 i=0
 while ! curl -o /dev/null -v -s "http://$GCS_HOST:$GCS_PORT/"; do

From 97b292fee5e4d0096b7d6a12c644dc69c522d5c0 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 16:43:52 +0800
Subject: [PATCH 12/24] add v4.0.8 br to test backup compatiblity

---
 tests/br_gcs/run.sh     | 47 +++++++++++++++++++++++++++++++++++------
 tests/download_tools.sh |  6 ++++++
 2 files changed, 47 insertions(+), 6 deletions(-)

diff --git a/tests/br_gcs/run.sh b/tests/br_gcs/run.sh
index f382ac67a..cdea660aa 100755
--- a/tests/br_gcs/run.sh
+++ b/tests/br_gcs/run.sh
@@ -22,7 +22,7 @@ GCS_HOST="localhost"
 GCS_PORT=10808
 BUCKET="test"
 
-# we need set public-host for download file, or it will 404 when using client to read.
+# we need set public-host for download file, or it will return 404 when using client to read.
 bin/fake-gcs-server -scheme http -host $GCS_HOST -port $GCS_PORT -backend memory -public-host $GCS_HOST:$GCS_PORT &
 GCS_ID=$!
 i=0
@@ -47,6 +47,7 @@ trap stop_gcs EXIT
 
 rm -rf "$TEST_DIR/$DB"
 mkdir -p "$TEST_DIR/$DB"
+
 # start gcs-server
 # Fill in the database
 for i in $(seq $DB_COUNT); do
@@ -54,7 +55,6 @@ for i in $(seq $DB_COUNT); do
     go-ycsb load mysql -P tests/$TEST_NAME/workload -p mysql.host=$TIDB_IP -p mysql.port=$TIDB_PORT -p mysql.user=root -p mysql.db=$DB${i}
 done
 
-# create gcs credentials
 # we need start a oauth server or gcs client will failed to handle request.
 KEY=$(cat <<- EOF
 {
@@ -65,8 +65,10 @@ KEY=$(cat <<- EOF
 }
 EOF)
 
+# save CREDENTIALS to file
 echo $KEY > "tests/$TEST_NAME/config.json"
-# create test CREDENTIALS for gcs oauth
+
+# export test CREDENTIALS for gcs oauth
 export GOOGLE_APPLICATION_CREDENTIALS="tests/$TEST_NAME/config.json"
 
 # create gcs bucket
@@ -76,15 +78,20 @@ for i in $(seq $DB_COUNT); do
   row_count_ori[${i}]=$(run_sql "SELECT COUNT(*) FROM $DB${i}.$TABLE;" | awk '/COUNT/{print $2}')
 done
 
-# backup full
+# new version backup full
 echo "backup start..."
 run_br --pd $PD_ADDR backup full -s "gcs://$BUCKET/$DB?endpoint=http://$GCS_HOST:$GCS_PORT/storage/v1/"
 
+# old version backup full v4.0.8
+echo "v4.0.8 backup start..."
+bin/brv4.0.8 --pd $PD_ADDR backup full -s "gcs://$BUCKET/${DB}_old?endpoint=http://$GCS_HOST:$GCS_PORT/storage/v1/"
+
+# clean up
 for i in $(seq $DB_COUNT); do
     run_sql "DROP DATABASE $DB${i};"
 done
 
-# restore full
+# new version restore full
 echo "restore start..."
 run_br restore full -s "gcs://$BUCKET/$DB?" --pd $PD_ADDR --gcs.endpoint="http://$GCS_HOST:$GCS_PORT/storage/v1/"
 
@@ -105,5 +112,33 @@ if $fail; then
     echo "TEST: [$TEST_NAME] failed!"
     exit 1
 else
-    echo "TEST: [$TEST_NAME] successed!"
+    echo "TEST: [$TEST_NAME] new version successd!"
+fi
+
+# clean up
+for i in $(seq $DB_COUNT); do
+    run_sql "DROP DATABASE $DB${i};"
+done
+
+echo "old version restore start..."
+run_br restore full -s "gcs://$BUCKET/${DB}_old" --pd $PD_ADDR --gcs.endpoint="http://$GCS_HOST:$GCS_PORT/storage/v1/"
+
+for i in $(seq $DB_COUNT); do
+    row_count_new[${i}]=$(run_sql "SELECT COUNT(*) FROM $DB${i}.$TABLE;" | awk '/COUNT/{print $2}')
+done
+
+fail=false
+for i in $(seq $DB_COUNT); do
+    if [ "${row_count_ori[i]}" != "${row_count_new[i]}" ];then
+        fail=true
+        echo "TEST: [$TEST_NAME] fail on database $DB${i}"
+    fi
+    echo "database $DB${i} [original] row count: ${row_count_ori[i]}, [after br] row count: ${row_count_new[i]}"
+done
+
+if $fail; then
+    echo "TEST: [$TEST_NAME] failed!"
+    exit 1
+else
+    echo "TEST: [$TEST_NAME] new version successd!"
 fi
diff --git a/tests/download_tools.sh b/tests/download_tools.sh
index 03533906c..737d4c7f3 100755
--- a/tests/download_tools.sh
+++ b/tests/download_tools.sh
@@ -71,6 +71,12 @@ if [ ! -e "$BIN/fake-gcs-server" ]; then
     chmod a+x "$BIN/fake-gcs-server"
 fi
 
+if [ ! -e "$BIN/brv4.0.8" ]; then
+    echo "Downloading brv4.0.8..."
+    curl -L -f -o "$BIN/brv4.0.8" "http://lease.pingcap.org/brv4.0.8"
+    chmod a+x "$BIN/brv4.0.8"
+fi
+
 if [ ! -e "$BIN/cdc" ]; then
     echo "Downloading cdc..."
     curl -L -f -o "$BIN/cdc.tar.gz" "https://download.pingcap.org/ticdc-nightly-linux-amd64.tar.gz"

From 5b24aa67b628e5ed48a3f03b491c4c28bc5cca62 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 17:19:04 +0800
Subject: [PATCH 13/24] fix ci

---
 pkg/storage/gcs.go  | 19 +++++++++----------
 pkg/task/common.go  |  5 +++--
 tests/br_gcs/run.sh |  8 ++++----
 3 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index e31b21417..73ebfce80 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -18,6 +18,8 @@ import (
 	"golang.org/x/oauth2/google"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+
+	berrors "github.com/pingcap/br/pkg/errors"
 )
 
 const (
@@ -166,21 +168,18 @@ func (s *gcsStorage) CreateUploader(ctx context.Context, name string) (Uploader,
 }
 
 func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOptions) (*gcsStorage, error) {
-	var (
-		err       error
-		creds     *google.Credentials
-		clientOps []option.ClientOption
-	)
+	var clientOps []option.ClientOption
 	if gcs.CredentialsBlob == "" {
-		creds, err = google.FindDefaultCredentials(ctx, storage.ScopeReadWrite)
+		creds, err := google.FindDefaultCredentials(ctx, storage.ScopeReadWrite)
 		if err != nil {
-			log.Warn("you should provide '--gcs.credentials_file'", zap.Error(err))
+			return nil, errors.Annotatef(berrors.ErrStorageInvalidConfig, "%v Or you should provide '--gcs.credentials_file'", err)
 		}
 		if opts.SendCredentials {
 			if len(creds.JSON) > 0 {
 				gcs.CredentialsBlob = string(creds.JSON)
 			} else {
-				log.Warn("You should provide '--gcs.credentials_file' when '--send-credentials-to-tikv' is true")
+				return nil, errors.Annotate(berrors.ErrStorageInvalidConfig,
+					"You should provide '--gcs.credentials_file' when '--send-credentials-to-tikv' is true")
 			}
 		}
 		if creds != nil {
@@ -214,7 +213,7 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 	it := bucket.Objects(ctx, &storage.Query{Prefix: gcs.Prefix})
 	for {
 		attrs, err := it.Next()
-		if err == iterator.Done {
+		if err == iterator.Done { // nolint:errorlint
 			break
 		}
 		if err != nil {
@@ -234,7 +233,7 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 	it2 := bucket.Objects(ctx, &storage.Query{Prefix: gcs.Prefix + "//"})
 	for {
 		attrs, err := it2.Next()
-		if err == iterator.Done {
+		if err == iterator.Done { // nolint:errorlint
 			break
 		}
 		if err != nil {
diff --git a/pkg/task/common.go b/pkg/task/common.go
index 27c69f920..63c1e688d 100644
--- a/pkg/task/common.go
+++ b/pkg/task/common.go
@@ -425,8 +425,9 @@ func ReadBackupMeta(
 			if err != nil {
 				return nil, nil, nil, errors.Trace(err)
 			}
+		} else {
+			return nil, nil, nil, errors.Annotate(err, "load backupmeta failed")
 		}
-		return nil, nil, nil, errors.Annotate(err, "load backupmeta failed")
 	}
 	backupMeta := &backup.BackupMeta{}
 	if err = proto.Unmarshal(metaData, backupMeta); err != nil {
@@ -502,5 +503,5 @@ func normalizePDURL(pd string, useTLS bool) (string, error) {
 // check whether it's a bug before #647, to solve case #1
 // see details https://github.com/pingcap/br/issues/675#issuecomment-753780742
 func gcsObjectNotFound(err error) bool {
-	return errors.Cause(err) == gcs.ErrObjectNotExist
+	return errors.Cause(err) == gcs.ErrObjectNotExist // nolint:errorlint
 }
diff --git a/tests/br_gcs/run.sh b/tests/br_gcs/run.sh
index cdea660aa..811ef1039 100755
--- a/tests/br_gcs/run.sh
+++ b/tests/br_gcs/run.sh
@@ -82,9 +82,9 @@ done
 echo "backup start..."
 run_br --pd $PD_ADDR backup full -s "gcs://$BUCKET/$DB?endpoint=http://$GCS_HOST:$GCS_PORT/storage/v1/"
 
-# old version backup full v4.0.8
+# old version backup full v4.0.8 and disable check-requirements
 echo "v4.0.8 backup start..."
-bin/brv4.0.8 --pd $PD_ADDR backup full -s "gcs://$BUCKET/${DB}_old?endpoint=http://$GCS_HOST:$GCS_PORT/storage/v1/"
+bin/brv4.0.8 --pd $PD_ADDR backup full -s "gcs://$BUCKET/${DB}_old?endpoint=http://$GCS_HOST:$GCS_PORT/storage/v1/" --check-requirements=false
 
 # clean up
 for i in $(seq $DB_COUNT); do
@@ -120,7 +120,7 @@ for i in $(seq $DB_COUNT); do
     run_sql "DROP DATABASE $DB${i};"
 done
 
-echo "old version restore start..."
+echo "v4.0.8 version restore start..."
 run_br restore full -s "gcs://$BUCKET/${DB}_old" --pd $PD_ADDR --gcs.endpoint="http://$GCS_HOST:$GCS_PORT/storage/v1/"
 
 for i in $(seq $DB_COUNT); do
@@ -140,5 +140,5 @@ if $fail; then
     echo "TEST: [$TEST_NAME] failed!"
     exit 1
 else
-    echo "TEST: [$TEST_NAME] new version successd!"
+    echo "TEST: [$TEST_NAME] v4.0.8 version successd!"
 fi

From b73ffd3cf5fac52a6d2064dd40adc668d941f489 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 19:08:23 +0800
Subject: [PATCH 14/24] fix ci

---
 go.mod1                  |  15 ++---
 go.sum1                  | 134 ++++++---------------------------------
 pkg/mock/mock_cluster.go |   3 +-
 3 files changed, 27 insertions(+), 125 deletions(-)

diff --git a/go.mod1 b/go.mod1
index cdc3b5162..4418fe2dc 100644
--- a/go.mod1
+++ b/go.mod1
@@ -3,7 +3,7 @@ module github.com/pingcap/br
 go 1.13
 
 require (
-	cloud.google.com/go/storage v1.12.0
+	cloud.google.com/go/storage v1.6.0
 	github.com/aws/aws-sdk-go v1.35.3
 	github.com/cheggaaa/pb/v3 v3.0.4
 	github.com/cheynewallace/tabby v1.1.0
@@ -13,7 +13,7 @@ require (
 	github.com/gogo/protobuf v1.3.1
 	github.com/golang/mock v1.4.4
 	github.com/google/btree v1.0.0
-	github.com/google/uuid v1.1.2
+	github.com/google/uuid v1.1.1
 	github.com/opentracing/opentracing-go v1.1.0
 	github.com/pingcap/check v0.0.0-20200212061837-5e12011dc712
 	github.com/pingcap/errors v0.11.5-0.20201126102027-b0a155152ca3
@@ -32,17 +32,14 @@ require (
 	go.etcd.io/etcd v0.5.0-alpha.5.0.20200824191128-ae9734ed278b
 	go.uber.org/multierr v1.6.0
 	go.uber.org/zap v1.16.0
-	golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5
+	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
-	google.golang.org/api v0.36.0
-	google.golang.org/grpc v1.34.0
+	google.golang.org/api v0.22.0
+	google.golang.org/grpc v1.27.1
 	sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0
 )
 
 replace (
-	cloud.google.com/go/storage => github.com/3pointer/google-cloud-go/storage v1.12.1-0.20210107115228-8b7680f50d0c
-	github.com/shirou/gopsutil => github.com/shirou/gopsutil v2.20.6-0.20200630091542-01afd763e6c0+incompatible
-
+	cloud.google.com/go/storage => github.com/3pointer/google-cloud-go/storage v1.6.1-0.20210108104611-43532c1a86ad
 	golang.org/x/sys => golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae
-	google.golang.org/grpc v1.34.0 => google.golang.org/grpc v1.29.0
 )
diff --git a/go.sum1 b/go.sum1
index 54756d103..7c47ca549 100644
--- a/go.sum1
+++ b/go.sum1
@@ -9,13 +9,10 @@ cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg
 cloud.google.com/go v0.49.0/go.mod h1:hGvAdzcWNbyuxS3nWhD7H2cIJxjRRTRLQVB0bdputVY=
 cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw=
 cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
-cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
-cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
-cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
-cloud.google.com/go v0.74.0 h1:kpgPA77kSSbjSs+fWHkPTxQ6J5Z2Qkruo5jfXEkHxNQ=
-cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
+cloud.google.com/go v0.53.0 h1:MZQCQQaRwOrAcuKjiHWHrgKykt4fZyuwF2dtiG3fGW8=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0 h1:xE3CPsOgttP4ACBePh79zTKALtXwn/Edhcr16R5hMWU=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
 cloud.google.com/go/bigtable v1.2.0/go.mod h1:JcVAOl45lrTmQfLj7T6TxyMzIN/3FGGcFm+2xVAli2o=
@@ -23,13 +20,14 @@ cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7
 cloud.google.com/go/datastore v1.1.0 h1:/May9ojXjRkPBNVrq+oWLqmWCkr4OU5uRY29bu0mRyQ=
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
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@@ -154,7 +152,6 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5P
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@@ -248,7 +245,6 @@ github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385/go.mod h1:0vRUJqYpeSZi
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@@ -356,6 +352,7 @@ github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4er
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@@ -367,17 +364,6 @@ github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
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@@ -391,31 +377,18 @@ github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5a
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@@ -423,8 +396,6 @@ github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+
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@@ -470,7 +441,6 @@ github.com/hypnoglow/gormzap v0.3.0/go.mod h1:5Wom8B7Jl2oK0Im9hs6KQ+Kl92w4Y7gKCr
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@@ -811,8 +781,10 @@ github.com/segmentio/kafka-go v0.1.0/go.mod h1:X6itGqS9L4jDletMsxZ7Dz+JFWxM6JHfP
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@@ -966,7 +938,6 @@ github.com/yookoala/realpath v1.0.0/go.mod h1:gJJMA9wuX7AcqLy1+ffPatSCySA1FQ2S8Y
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 github.com/yuin/gopher-lua v0.0.0-20181031023651-12c4817b42c5/go.mod h1:aEV29XrmTYFr3CiRxZeGHpkvbwq+prZduBqMaascyCU=
 github.com/zaf/temp v0.0.0-20170209143821-94e385923345/go.mod h1:sXsZgXwh6DB0qlskmZVB4HE93e5YrktMrgUDPy9iYmY=
 github.com/zhangjinpeng1987/raft v0.0.0-20200819064223-df31bb68a018 h1:T3OrqVdcH6z6SakR7WkECvGpdkfB0MAur/6zf66GPxQ=
@@ -987,10 +958,6 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-go.opencensus.io v0.22.4 h1:LYy1Hy3MJdrCdMwwzxA/dRok4ejH+RwNGbuoD9fCjto=
-go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-go.opencensus.io v0.22.5 h1:dntmOdLpSpHlVqbW5Eay97DelsZHe+55D+xC6i0dDS0=
-go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
@@ -1051,6 +1018,7 @@ golang.org/x/exp v0.0.0-20191129062945-2f5052295587/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
+golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
 golang.org/x/exp v0.0.0-20200513190911-00229845015e h1:rMqLP+9XLy+LdbCXHjJHAmTfXCr93W7oruWA6Hq1Alc=
 golang.org/x/exp v0.0.0-20200513190911-00229845015e/go.mod h1:4M0jN8W1tt0AVLNr8HDosyJCDCDuyL9N9+3m7wDWgKw=
 golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81/go.mod h1:ux5Hcp/YLpHSI86hEcLt0YII63i6oz57MZXIpbrjZUs=
@@ -1068,8 +1036,6 @@ golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRu
 golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b h1:Wh+f8QHJXR411sJR8/vRBTZ7YapZaRvUcLFFJhusH0k=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
-golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5 h1:2M3HP5CCK1Si9FQhwnzYhXdG6DXeebvUHFpre8QvbyI=
-golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
@@ -1079,8 +1045,6 @@ golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.0 h1:8pl+sMODzuvGJkmj2W4kZihvVb5mKm8pB/X44PIQHv8=
-golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -1099,7 +1063,6 @@ golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR
 golang.org/x/net v0.0.0-20190611141213-3f473d35a33a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -1107,43 +1070,32 @@ golang.org/x/net v0.0.0-20191002035440-2ec189313ef0/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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 golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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@@ -1185,6 +1137,7 @@ golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20191030062658-86caa796c7ab/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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@@ -1199,30 +1152,19 @@ golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapK
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-golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
-golang.org/x/tools v0.0.0-20201110124207-079ba7bd75cd/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20201201161351-ac6f37ff4c2a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20201208233053-a543418bbed2/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.0.0-20210105210202-9ed45478a130 h1:8qSBr5nyKsEgkP918Pu5FFDZpTtLIjXSo6mrtdVOFfk=
-golang.org/x/tools v0.0.0-20210105210202-9ed45478a130/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.0.0-20180816165407-929014505bf4/go.mod h1:Y+Yx5eoAFn32cQvJDxZx5Dpnq+c3wtXuadVZAcxbbBo=
 gonum.org/v1/gonum v0.0.0-20181121035319-3f7ecaa7e8ca/go.mod h1:Y+Yx5eoAFn32cQvJDxZx5Dpnq+c3wtXuadVZAcxbbBo=
 gonum.org/v1/gonum v0.6.0/go.mod h1:9mxDZsDKxgMAuccQkewq682L+0eCu4dCN2yonUJTCLU=
@@ -1237,15 +1179,9 @@ google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsb
 google.golang.org/api v0.14.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/api v0.15.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/api v0.17.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
-google.golang.org/api v0.20.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
+google.golang.org/api v0.18.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
 google.golang.org/api v0.22.0 h1:J1Pl9P2lnmYFSJvgs70DKELqHNh8CNWXPbud4njEE2s=
 google.golang.org/api v0.22.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
-google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
-google.golang.org/api v0.30.0 h1:yfrXXP61wVuLb0vBcG6qaOoIoqYEzOQS8jum51jkv2w=
-google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
-google.golang.org/api v0.35.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
-google.golang.org/api v0.36.0 h1:l2Nfbl2GPXdWorv+dT2XfinX2jOOw4zv1VhLstx+6rE=
-google.golang.org/api v0.36.0/go.mod h1:+z5ficQTmoYpPn8LCUNVpK5I7hwkpjbcgqA7I34qYtE=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -1253,10 +1189,6 @@ google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww
 google.golang.org/appengine v1.6.2/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/appengine v1.6.5 h1:tycE03LOZYQNhDpS27tcQdAzLCVMaj7QT2SXxebnpCM=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/appengine v1.6.6 h1:lMO5rYAqUxkmaj76jAkRUvt5JZgFymx/+Q5Mzfivuhc=
-google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/appengine v1.6.7 h1:FZR1q0exgwxzPzp/aF+VccGrSfxfPpkBqjIIEq3ru6c=
-google.golang.org/appengine v1.6.7/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20181004005441-af9cb2a35e7f/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@@ -1269,6 +1201,7 @@ google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98
 google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
 google.golang.org/genproto v0.0.0-20190927181202-20e1ac93f88c/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
 google.golang.org/genproto v0.0.0-20191028173616-919d9bdd9fe6/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
+google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
 google.golang.org/genproto v0.0.0-20191114150713-6bbd007550de/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
 google.golang.org/genproto v0.0.0-20191115194625-c23dd37a84c9/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
 google.golang.org/genproto v0.0.0-20191206224255-0243a4be9c8f/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
@@ -1278,17 +1211,8 @@ google.golang.org/genproto v0.0.0-20200115191322-ca5a22157cba/go.mod h1:n3cpQtvx
 google.golang.org/genproto v0.0.0-20200122232147-0452cf42e150/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
 google.golang.org/genproto v0.0.0-20200204135345-fa8e72b47b90/go.mod h1:GmwEX6Z4W5gMy59cAlVYjN9JhxgbQH6Gn+gFDQe2lzA=
 google.golang.org/genproto v0.0.0-20200212174721-66ed5ce911ce/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201109203340-2640f1f9cdfb/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201201144952-b05cb90ed32e/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201210142538-e3217bee35cc/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20210105202744-fe13368bc0e1 h1:Zk6zlGXdtYdcY5TL+VrbTfmifvk3VvsXopCpszsHPBA=
-google.golang.org/genproto v0.0.0-20210105202744-fe13368bc0e1/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63 h1:YzfoEYWbODU5Fbt37+h7X16BWQbad7Q4S6gclTKFXM8=
+google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/grpc v0.0.0-20180607172857-7a6a684ca69e/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
@@ -1302,24 +1226,6 @@ google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.1 h1:zvIju4sqAGvwKspUQOhwnpcqSbzi7/H6QomNNjTL4sk=
 google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
-google.golang.org/grpc v1.29.0 h1:2pJjwYOdkZ9HlN4sWRYBg9ttH5bCOlsueaM+b/oYjwo=
-google.golang.org/grpc v1.29.0/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
-google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.31.1/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
-google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
-google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
-google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
-google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
-google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
-google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 gopkg.in/VividCortex/ewma.v1 v1.1.1/go.mod h1:TekXuFipeiHWiAlO1+wSS23vTcyFau5u3rxXUSXj710=
 gopkg.in/alecthomas/gometalinter.v2 v2.0.12/go.mod h1:NDRytsqEZyolNuAgTzJkZMkSQM7FIKyzVzGhjB/qfYo=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=
diff --git a/pkg/mock/mock_cluster.go b/pkg/mock/mock_cluster.go
index 3a24b9bbf..5dca43614 100644
--- a/pkg/mock/mock_cluster.go
+++ b/pkg/mock/mock_cluster.go
@@ -59,11 +59,10 @@ func NewCluster() (*Cluster, error) {
 
 	mvccStore := mocktikv.MustNewMVCCStore()
 	client, cluster, pdClient, err := mocktikv.NewTiKVAndPDClient("")
-	mocktikv.BootstrapWithSingleStore(cluster)
-
 	if err != nil {
 		return nil, errors.Trace(err)
 	}
+	mocktikv.BootstrapWithSingleStore(cluster)
 	storage, err := tikv.NewTestTiKVStore(client, pdClient, nil, nil, 0)
 	if err != nil {
 		return nil, errors.Trace(err)

From 44a4e9b48350a59df59c30af6b9bfd5247319d51 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 19:18:15 +0800
Subject: [PATCH 15/24] fix ci

---
 pkg/storage/gcs.go | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index 73ebfce80..35c5bcd97 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -211,8 +211,9 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 	sstInPrefix := false
 	sstInPrefixSlash := false
 	it := bucket.Objects(ctx, &storage.Query{Prefix: gcs.Prefix})
+	var attrs *storage.ObjectAttrs
 	for {
-		attrs, err := it.Next()
+		attrs, err = it.Next()
 		if err == iterator.Done { // nolint:errorlint
 			break
 		}
@@ -230,9 +231,9 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 			break
 		}
 	}
-	it2 := bucket.Objects(ctx, &storage.Query{Prefix: gcs.Prefix + "//"})
+	it = bucket.Objects(ctx, &storage.Query{Prefix: gcs.Prefix + "//"})
 	for {
-		attrs, err := it2.Next()
+		attrs, err = it.Next()
 		if err == iterator.Done { // nolint:errorlint
 			break
 		}

From 224f242921d715b23fa368a21ecc156e19a0a14b Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 19:27:50 +0800
Subject: [PATCH 16/24] address comment

---
 pkg/storage/gcs.go  | 5 ++++-
 pkg/task/common.go  | 3 +++
 tests/br_gcs/run.sh | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index 35c5bcd97..87b436bdb 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -206,7 +206,10 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 	}
 
 	bucket := client.Bucket(gcs.Bucket)
-	// we need adjust prefix for gcs storage to make restore compatible with old version backup files.
+	// check whether it's a bug before #647, to solve case #2
+	// If the storage is set as gcs://bucket/prefix/,
+	// the backupmeta is written correctly to gcs://bucket/prefix/backupmeta,
+	// but the SSTs are written wrongly to gcs://bucket/prefix//*.sst (note the extra slash).
 	// see details about case 2 at https://github.com/pingcap/br/issues/675#issuecomment-753780742
 	sstInPrefix := false
 	sstInPrefixSlash := false
diff --git a/pkg/task/common.go b/pkg/task/common.go
index 63c1e688d..8803beda0 100644
--- a/pkg/task/common.go
+++ b/pkg/task/common.go
@@ -501,6 +501,9 @@ func normalizePDURL(pd string, useTLS bool) (string, error) {
 }
 
 // check whether it's a bug before #647, to solve case #1
+// If the storage is set as gcs://bucket/prefix,
+// the SSTs are written correctly to gcs://bucket/prefix/*.sst
+// but the backupmeta is written wrongly to gcs://bucket/prefixbackupmeta.
 // see details https://github.com/pingcap/br/issues/675#issuecomment-753780742
 func gcsObjectNotFound(err error) bool {
 	return errors.Cause(err) == gcs.ErrObjectNotExist // nolint:errorlint
diff --git a/tests/br_gcs/run.sh b/tests/br_gcs/run.sh
index 811ef1039..a5be052de 100755
--- a/tests/br_gcs/run.sh
+++ b/tests/br_gcs/run.sh
@@ -19,7 +19,7 @@ TABLE="usertable"
 DB_COUNT=3
 
 GCS_HOST="localhost"
-GCS_PORT=10808
+GCS_PORT=21808
 BUCKET="test"
 
 # we need set public-host for download file, or it will return 404 when using client to read.

From 1d09ce3e11793ae6925ed0f830652a16b98eeac6 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 19:42:36 +0800
Subject: [PATCH 17/24] solve conflict

---
 pkg/task/common.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkg/task/common.go b/pkg/task/common.go
index 44da0cf6f..778f6ab5a 100644
--- a/pkg/task/common.go
+++ b/pkg/task/common.go
@@ -421,7 +421,7 @@ func ReadBackupMeta(
 				return nil, nil, nil, errors.Trace(err)
 			}
 			log.Info("retry load metadata in gcs", zap.String("newPrefix", newPrefix), zap.String("newFileName", newFileName))
-			metaData, err = s.Read(ctx, newFileName)
+			metaData, err = s.ReadFile(ctx, newFileName)
 			if err != nil {
 				return nil, nil, nil, errors.Trace(err)
 			}

From 09251d8278a2ccd04b5a91142149bda372f25bf2 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 21:00:19 +0800
Subject: [PATCH 18/24] abstract code

---
 pkg/storage/gcs.go | 56 ++++++++++++++++------------------------------
 1 file changed, 19 insertions(+), 37 deletions(-)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index 23ada38ef..23785c28d 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -214,32 +214,27 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 	// the backupmeta is written correctly to gcs://bucket/prefix/backupmeta,
 	// but the SSTs are written wrongly to gcs://bucket/prefix//*.sst (note the extra slash).
 	// see details about case 2 at https://github.com/pingcap/br/issues/675#issuecomment-753780742
-	sstInPrefix := false
-	sstInPrefixSlash := false
-	it := bucket.Objects(ctx, &storage.Query{Prefix: gcs.Prefix})
-	var attrs *storage.ObjectAttrs
-	for {
-		attrs, err = it.Next()
-		if err == iterator.Done { // nolint:errorlint
-			break
-		}
+	sstInPrefix := hasSSTFiles(ctx, bucket, gcs.Prefix)
+	sstInPrefixSlash := hasSSTFiles(ctx, bucket, gcs.Prefix+"//")
+	if sstInPrefixSlash && !sstInPrefix {
+		// This is a old bug, but we must make it compatible.
+		// so we need find sst in slash directory
+		gcs.Prefix += "//"
+	}
+	if !opts.SkipCheckPath {
+		// check bucket exists
+		_, err = bucket.Attrs(ctx)
 		if err != nil {
-			log.Warn("failed to list objects on gcs, will use default value for `prefix`", zap.Error(err))
-			break
-		}
-		if strings.HasPrefix(attrs.Name, "backup") {
-			log.Info("meta file found in prefix", zap.String("file", attrs.Name))
-			continue
-		}
-		if strings.HasSuffix(attrs.Name, ".sst") {
-			log.Info("sst file found in prefix", zap.String("file", attrs.Name))
-			sstInPrefix = true
-			break
+			return nil, errors.Trace(err)
 		}
 	}
-	it = bucket.Objects(ctx, &storage.Query{Prefix: gcs.Prefix + "//"})
+	return &gcsStorage{gcs: gcs, bucket: bucket}, nil
+}
+
+func hasSSTFiles(ctx context.Context, bucket *storage.BucketHandle, prefix string) bool {
+	it := bucket.Objects(ctx, &storage.Query{Prefix: prefix})
 	for {
-		attrs, err = it.Next()
+		attrs, err := it.Next()
 		if err == iterator.Done { // nolint:errorlint
 			break
 		}
@@ -249,21 +244,8 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 		}
 		if strings.HasSuffix(attrs.Name, ".sst") {
 			log.Info("sst file found in prefix slash", zap.String("file", attrs.Name))
-			sstInPrefixSlash = true
-			break
-		}
-	}
-	if sstInPrefixSlash && !sstInPrefix {
-		// This is a old bug, but we must make it compatible.
-		// so we need find sst in slash directory
-		gcs.Prefix += "//"
-	}
-	if !opts.SkipCheckPath {
-		// check bucket exists
-		_, err = bucket.Attrs(ctx)
-		if err != nil {
-			return nil, errors.Trace(err)
+			return true
 		}
 	}
-	return &gcsStorage{gcs: gcs, bucket: bucket}, nil
+	return false
 }

From b559a7c097d0b0af1deb3787342e5e1d3f2d3c77 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 21:03:56 +0800
Subject: [PATCH 19/24] go mod: update gcs package

---
 go.mod1 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/go.mod1 b/go.mod1
index 4418fe2dc..0b2d27eb4 100644
--- a/go.mod1
+++ b/go.mod1
@@ -40,6 +40,6 @@ require (
 )
 
 replace (
-	cloud.google.com/go/storage => github.com/3pointer/google-cloud-go/storage v1.6.1-0.20210108104611-43532c1a86ad
+	cloud.google.com/go/storage => github.com/3pointer/google-cloud-go/storage v1.6.1-0.20210108125931-b59bfa0720b2
 	golang.org/x/sys => golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae
 )

From 6a9a3e96e6d3ffb1be074ed6c21a784f8504c9c4 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Fri, 8 Jan 2021 21:04:50 +0800
Subject: [PATCH 20/24] fix build

---
 go.sum1 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/go.sum1 b/go.sum1
index 7c47ca549..48f6044d0 100644
--- a/go.sum1
+++ b/go.sum1
@@ -26,8 +26,8 @@ cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIA
 cloud.google.com/go/spanner v1.1.0/go.mod h1:TzTaF9l2ZY2CIetNvVpUu6ZQy8YEOtzB6ICa5EwYjL0=
 collectd.org v0.3.0/go.mod h1:A/8DzQBkF6abtvrT2j/AU/4tiBgJWYyh0y/oB/4MlWE=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/3pointer/google-cloud-go/storage v1.6.1-0.20210108104611-43532c1a86ad h1:80dU5kYeTTSgnzbkKDuWckOEUPAKT1R431WMCh7m730=
-github.com/3pointer/google-cloud-go/storage v1.6.1-0.20210108104611-43532c1a86ad/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
+github.com/3pointer/google-cloud-go/storage v1.6.1-0.20210108125931-b59bfa0720b2 h1:Bnm+q0FAI1AXoPX3cPIi2/a4sg2J2f/D0yPr+7EMPg0=
+github.com/3pointer/google-cloud-go/storage v1.6.1-0.20210108125931-b59bfa0720b2/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
 github.com/AndreasBriese/bbloom v0.0.0-20180913140656-343706a395b7/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/AstroProfundis/sysinfo v0.0.0-20200423033635-f6f7687215fd/go.mod h1:4m15VhW6ZffaqJNAK/HtN3Qvf97aCe1T39u3UXaA2lA=
 github.com/AstroProfundis/tabby v1.1.0-color/go.mod h1:Wcm+uinH1saEOFGLK2LdY37lAOts8HLevz64Y3y3M3Q=

From 8a8b69b4613792a96e520cc30262e5a1f4d8e6e0 Mon Sep 17 00:00:00 2001
From: 3pointer <luancheng@pingcap.com>
Date: Mon, 11 Jan 2021 11:15:02 +0800
Subject: [PATCH 21/24] Apply suggestions from code review

Co-authored-by: kennytm <kennytm@gmail.com>
---
 pkg/storage/gcs.go    | 4 +++-
 tests/br_gcs/oauth.py | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index 23785c28d..969de2010 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -232,7 +232,9 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 }
 
 func hasSSTFiles(ctx context.Context, bucket *storage.BucketHandle, prefix string) bool {
-	it := bucket.Objects(ctx, &storage.Query{Prefix: prefix})
+	query := storage.Query{Prefix: prefix}
+	query.SetAttrSelection([]string{"Name"})
+	it := bucket.Objects(ctx, &query)
 	for {
 		attrs, err := it.Next()
 		if err == iterator.Done { // nolint:errorlint
diff --git a/tests/br_gcs/oauth.py b/tests/br_gcs/oauth.py
index 0eefcdb61..24e686184 100644
--- a/tests/br_gcs/oauth.py
+++ b/tests/br_gcs/oauth.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from flask import Flask
 
 app = Flask(__name__)

From 71d964b9f2aa4f26b3ab5dc2cf55390f07fb6c39 Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Mon, 11 Jan 2021 11:24:41 +0800
Subject: [PATCH 22/24] addess comment

---
 go.mod1            |  5 +----
 go.sum1            | 49 ++++++++++++++++++++++++++++++++++++++++++++--
 pkg/storage/gcs.go |  2 +-
 pkg/task/common.go |  2 +-
 4 files changed, 50 insertions(+), 8 deletions(-)

diff --git a/go.mod1 b/go.mod1
index 0b2d27eb4..615c46760 100644
--- a/go.mod1
+++ b/go.mod1
@@ -39,7 +39,4 @@ require (
 	sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0
 )
 
-replace (
-	cloud.google.com/go/storage => github.com/3pointer/google-cloud-go/storage v1.6.1-0.20210108125931-b59bfa0720b2
-	golang.org/x/sys => golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae
-)
+replace cloud.google.com/go/storage => github.com/3pointer/google-cloud-go/storage v1.6.1-0.20210108125931-b59bfa0720b2
diff --git a/go.sum1 b/go.sum1
index 48f6044d0..80bc34f52 100644
--- a/go.sum1
+++ b/go.sum1
@@ -1094,8 +1094,53 @@ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae h1:Ih9Yo4hSPImZOpfGuA4bR/ORKTAbhZo2AbWNRCnevdo=
-golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181011152604-fa43e7bc11ba/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181128092732-4ed8d59d0b35/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181221143128-b4a75ba826a6/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181228144115-9a3f9b0469bb/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190610200419-93c9922d18ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190616124812-15dcb6c0061f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190801041406-cbf593c0f2f3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191128015809-6d18c012aee9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191210023423-ac6580df4449/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191220142924-d4481acd189f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200107162124-548cf772de50/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200113162924-86b910548bc1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200212091648-12a6c2dcc1e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200413165638-669c56c373c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200819171115-d785dc25833f h1:KJuwZVtZBVzDmEDtB2zro9CXkD9O0dpCv4o2LHbQIAw=
+golang.org/x/sys v0.0.0-20200819171115-d785dc25833f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/pkg/storage/gcs.go b/pkg/storage/gcs.go
index 969de2010..610a03058 100644
--- a/pkg/storage/gcs.go
+++ b/pkg/storage/gcs.go
@@ -233,7 +233,7 @@ func newGCSStorage(ctx context.Context, gcs *backup.GCS, opts *ExternalStorageOp
 
 func hasSSTFiles(ctx context.Context, bucket *storage.BucketHandle, prefix string) bool {
 	query := storage.Query{Prefix: prefix}
-	query.SetAttrSelection([]string{"Name"})
+	_ = query.SetAttrSelection([]string{"Name"})
 	it := bucket.Objects(ctx, &query)
 	for {
 		attrs, err := it.Next()
diff --git a/pkg/task/common.go b/pkg/task/common.go
index 778f6ab5a..f22766c47 100644
--- a/pkg/task/common.go
+++ b/pkg/task/common.go
@@ -7,7 +7,7 @@ import (
 	"crypto/tls"
 	"fmt"
 	"net/url"
-	filepath "path"
+	"path/filepath"
 	"strings"
 	"time"
 

From 2584619ea17c32fda6a783b9fa5c13599e491a9e Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Mon, 11 Jan 2021 16:03:07 +0800
Subject: [PATCH 23/24] address comment

---
 pkg/task/common.go | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/pkg/task/common.go b/pkg/task/common.go
index f22766c47..bf158a60b 100644
--- a/pkg/task/common.go
+++ b/pkg/task/common.go
@@ -7,7 +7,7 @@ import (
 	"crypto/tls"
 	"fmt"
 	"net/url"
-	"path/filepath"
+	"path"
 	"strings"
 	"time"
 
@@ -409,14 +409,10 @@ func ReadBackupMeta(
 	if err != nil {
 		if gcsObjectNotFound(err) {
 			// change gcs://bucket/abc/def to gcs://bucket/abc and read defbackupmeta
-			parsedURL, err := storage.ParseRawURL(cfg.Storage)
-			if err != nil {
-				return nil, nil, nil, errors.Trace(err)
-			}
-			newPrefix, file := filepath.Split(parsedURL.Path)
+			newPrefix, file := path.Split(u.GetGcs().GetPrefix())
 			newFileName := file + fileName
-			cfg.Storage = strings.ReplaceAll(cfg.Storage, parsedURL.Path, newPrefix)
-			_, s, err = GetStorage(ctx, cfg)
+			u.GetGcs().Prefix = newPrefix
+			s, err = storage.Create(ctx, u, cfg.SendCreds)
 			if err != nil {
 				return nil, nil, nil, errors.Trace(err)
 			}

From 64e44c7b1fe5ff05aa9f32b09d0ecd2da04e9f7a Mon Sep 17 00:00:00 2001
From: luancheng <luancheng@pingcap.com>
Date: Mon, 11 Jan 2021 17:04:40 +0800
Subject: [PATCH 24/24] fix ci

---
 pkg/task/common.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkg/task/common.go b/pkg/task/common.go
index bf158a60b..071e3a9f1 100644
--- a/pkg/task/common.go
+++ b/pkg/task/common.go
@@ -409,7 +409,8 @@ func ReadBackupMeta(
 	if err != nil {
 		if gcsObjectNotFound(err) {
 			// change gcs://bucket/abc/def to gcs://bucket/abc and read defbackupmeta
-			newPrefix, file := path.Split(u.GetGcs().GetPrefix())
+			oldPrefix := u.GetGcs().GetPrefix()
+			newPrefix, file := path.Split(oldPrefix)
 			newFileName := file + fileName
 			u.GetGcs().Prefix = newPrefix
 			s, err = storage.Create(ctx, u, cfg.SendCreds)
@@ -421,6 +422,8 @@ func ReadBackupMeta(
 			if err != nil {
 				return nil, nil, nil, errors.Trace(err)
 			}
+			// reset prefix for tikv download sst file correctly.
+			u.GetGcs().Prefix = oldPrefix
 		} else {
 			return nil, nil, nil, errors.Annotate(err, "load backupmeta failed")
 		}