From c566098c81bcc96fac0a88b48c6645b3e9241d9a Mon Sep 17 00:00:00 2001
From: James Lu <james.lu@suse.com>
Date: Thu, 16 Mar 2023 22:29:02 +0800
Subject: [PATCH] vendor: update `backupstore` by v1.3.x branch

from `20220913112826-5f5c95274f2a` to `20230306022849-8d5e216c3b33`

Ref: 5265

Signed-off-by: James Lu <james.lu@suse.com>
---
 go.mod                                        |   2 +-
 go.sum                                        |   3 +-
 .../longhorn/backupstore/Dockerfile.dapper    |   2 +-
 .../longhorn/backupstore/backupstore.go       |  26 +-
 .../github.com/longhorn/backupstore/config.go |  63 ++-
 .../longhorn/backupstore/deltablock.go        |  36 +-
 .../github.com/longhorn/backupstore/driver.go |   8 +-
 .../longhorn/backupstore/fsops/fsops.go       |  15 +-
 vendor/github.com/longhorn/backupstore/go.mod |   1 +
 .../longhorn/backupstore/http/client.go       |   6 +
 .../github.com/longhorn/backupstore/list.go   |   4 +-
 .../github.com/longhorn/backupstore/lock.go   |   8 +-
 .../longhorn/backupstore/logging/logging.go   |   1 +
 .../longhorn/backupstore/nfs/nfs.go           |  19 +-
 .../github.com/longhorn/backupstore/s3/s3.go  |  26 +-
 .../longhorn/backupstore/s3/s3_service.go     |   7 +-
 .../longhorn/backupstore/singlefile.go        |  10 +-
 .../longhorn/backupstore/util/util.go         |  21 +-
 .../longhorn/backupstore/vfs/vfs.go           |   2 +-
 .../golang.org/x/net/http/httpproxy/proxy.go  | 370 ++++++++++++++++++
 vendor/modules.txt                            |   3 +-
 21 files changed, 533 insertions(+), 100 deletions(-)
 create mode 100644 vendor/golang.org/x/net/http/httpproxy/proxy.go

diff --git a/go.mod b/go.mod
index 6c2c040b9..bea850b41 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/RoaringBitmap/roaring v0.4.18
 	github.com/golang/protobuf v1.3.3-0.20190920234318-1680a479a2cf
 	github.com/google/uuid v1.3.0
-	github.com/longhorn/backupstore v0.0.0-20220913112826-5f5c95274f2a
+	github.com/longhorn/backupstore v0.0.0-20230306022849-8d5e216c3b33
 	github.com/longhorn/longhorn-engine v1.3.3-0.20230216042703-718990dc8a35
 	github.com/pkg/errors v0.9.1
 	github.com/sirupsen/logrus v1.8.1
diff --git a/go.sum b/go.sum
index 055becc6f..597880990 100644
--- a/go.sum
+++ b/go.sum
@@ -46,8 +46,9 @@ github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
-github.com/longhorn/backupstore v0.0.0-20220913112826-5f5c95274f2a h1:f+mLqp3A5M7plw1pBgf8K1nvJxSU7mrGtU7bii+W5Bk=
 github.com/longhorn/backupstore v0.0.0-20220913112826-5f5c95274f2a/go.mod h1:hvIVsrpjPey7KupirAh0WoPMg0ArWnE6fA5bI30X7AI=
+github.com/longhorn/backupstore v0.0.0-20230306022849-8d5e216c3b33 h1:zfRoewEi64drdl4PzGcdw88jobkiAbQpxBT6IbT+zmY=
+github.com/longhorn/backupstore v0.0.0-20230306022849-8d5e216c3b33/go.mod h1:NFJYOfVUk22TZPSVbKHFgL0JgbJP0suXdixr1042sM8=
 github.com/longhorn/go-iscsi-helper v0.0.0-20230215045129-588aa7586e4c h1:M4UR1cVrVHHKqwc4aL3MUlp1d/Z2i7T7VS1y0SSUwa8=
 github.com/longhorn/go-iscsi-helper v0.0.0-20230215045129-588aa7586e4c/go.mod h1:9z/y9glKmWEdV50tjlUPxFwi1goQfIrrsoZbnMyIZbY=
 github.com/longhorn/longhorn-engine v1.3.3-0.20230216042703-718990dc8a35 h1:3RgCpW+8XGrUq3U5pSH1cDszVu6gIWhGs2akEEdtAZc=
diff --git a/vendor/github.com/longhorn/backupstore/Dockerfile.dapper b/vendor/github.com/longhorn/backupstore/Dockerfile.dapper
index b965fb96a..c6c3f58b6 100644
--- a/vendor/github.com/longhorn/backupstore/Dockerfile.dapper
+++ b/vendor/github.com/longhorn/backupstore/Dockerfile.dapper
@@ -19,7 +19,7 @@ ENV GOLANG_ARCH_amd64=amd64 GOLANG_ARCH_arm=armv6l GOLANG_ARCH=GOLANG_ARCH_${ARC
     GOPATH=/go PATH=/go/bin:/usr/local/go/bin:${PATH} SHELL=/bin/bash
 
 RUN wget -O - https://storage.googleapis.com/golang/go1.13.3.linux-${!GOLANG_ARCH}.tar.gz | tar -xzf - -C /usr/local && \
-    go get github.com/rancher/trash && go get -u golang.org/x/lint/golint
+    go get github.com/rancher/trash && GO111MODULE=on go get golang.org/x/lint/golint@v0.0.0-20210508222113-6edffad5e616
 
 ENV DAPPER_SOURCE /go/src/github.com/longhorn/backupstore
 ENV DAPPER_OUTPUT ./bin
diff --git a/vendor/github.com/longhorn/backupstore/backupstore.go b/vendor/github.com/longhorn/backupstore/backupstore.go
index 3321066fb..f0008fae2 100644
--- a/vendor/github.com/longhorn/backupstore/backupstore.go
+++ b/vendor/github.com/longhorn/backupstore/backupstore.go
@@ -5,6 +5,7 @@ import (
 	"net/url"
 
 	"github.com/longhorn/backupstore/util"
+	"github.com/pkg/errors"
 )
 
 type Volume struct {
@@ -56,21 +57,20 @@ func addVolume(volume *Volume, driver BackupStoreDriver) error {
 	}
 
 	if !util.ValidateName(volume.Name) {
-		return fmt.Errorf("Invalid volume name %v", volume.Name)
+		return fmt.Errorf("invalid volume name %v", volume.Name)
 	}
 
 	if err := saveVolume(volume, driver); err != nil {
-		log.Error("Fail add volume ", volume.Name)
+		log.WithError(err).Errorf("Failed to add volume %v", volume.Name)
 		return err
 	}
-	log.Debug("Added backupstore volume ", volume.Name)
-
+	log.Infof("Added backupstore volume %v", volume.Name)
 	return nil
 }
 
 func removeVolume(volumeName string, driver BackupStoreDriver) error {
 	if !util.ValidateName(volumeName) {
-		return fmt.Errorf("Invalid volume name %v", volumeName)
+		return fmt.Errorf("invalid volume name %v", volumeName)
 	}
 
 	volumeDir := getVolumePath(volumeName)
@@ -78,20 +78,20 @@ func removeVolume(volumeName string, driver BackupStoreDriver) error {
 	volumeBackupsDirectory := getBackupPath(volumeName)
 	volumeLocksDirectory := getLockPath(volumeName)
 	if err := driver.Remove(volumeBackupsDirectory); err != nil {
-		return fmt.Errorf("failed to remove all the backups for volume %v: %v", volumeName, err)
+		return errors.Wrapf(err, "failed to remove all the backups for volume %v", volumeName)
 	}
 	if err := driver.Remove(volumeBlocksDirectory); err != nil {
-		return fmt.Errorf("failed to remove all the blocks for volume %v: %v", volumeName, err)
+		return errors.Wrapf(err, "failed to remove all the blocks for volume %v", volumeName)
 	}
 	if err := driver.Remove(volumeLocksDirectory); err != nil {
-		return fmt.Errorf("failed to remove all the locks for volume %v: %v", volumeName, err)
+		return errors.Wrapf(err, "failed to remove all the locks for volume %v", volumeName)
 	}
 	if err := driver.Remove(volumeDir); err != nil {
-		return fmt.Errorf("failed to remove backup volume %v directory in backupstore: %v", volumeName, err)
+		return errors.Wrapf(err, "failed to remove backup volume %v directory in backupstore", volumeName)
 	}
 
-	log.Debug("Removed volume directory in backupstore: ", volumeDir)
-	log.Debug("Removed backupstore volume ", volumeName)
+	log.Infof("Removed volume directory in backupstore %v", volumeDir)
+	log.Infof("Removed backupstore volume %v", volumeName)
 
 	return nil
 }
@@ -114,10 +114,10 @@ func DecodeBackupURL(backupURL string) (string, string, string, error) {
 	volumeName := v.Get("volume")
 	backupName := v.Get("backup")
 	if !util.ValidateName(volumeName) {
-		return "", "", "", fmt.Errorf("Invalid volume name parsed, got %v", volumeName)
+		return "", "", "", fmt.Errorf("invalid volume name parsed, got %v", volumeName)
 	}
 	if backupName != "" && !util.ValidateName(backupName) {
-		return "", "", "", fmt.Errorf("Invalid backup name parsed, got %v", backupName)
+		return "", "", "", fmt.Errorf("invalid backup name parsed, got %v", backupName)
 	}
 	u.RawQuery = ""
 	destURL := u.String()
diff --git a/vendor/github.com/longhorn/backupstore/config.go b/vendor/github.com/longhorn/backupstore/config.go
index 9e38d3af7..8b5e3b302 100644
--- a/vendor/github.com/longhorn/backupstore/config.go
+++ b/vendor/github.com/longhorn/backupstore/config.go
@@ -33,7 +33,7 @@ func getBackupConfigName(id string) string {
 	return BACKUP_CONFIG_PREFIX + id + CFG_SUFFIX
 }
 
-func loadConfigInBackupStore(filePath string, driver BackupStoreDriver, v interface{}) error {
+func LoadConfigInBackupStore(filePath string, driver BackupStoreDriver, v interface{}) error {
 	if !driver.FileExists(filePath) {
 		return fmt.Errorf("cannot find %v in backupstore", filePath)
 	}
@@ -61,7 +61,7 @@ func loadConfigInBackupStore(filePath string, driver BackupStoreDriver, v interf
 	return nil
 }
 
-func saveConfigInBackupStore(filePath string, driver BackupStoreDriver, v interface{}) error {
+func SaveConfigInBackupStore(filePath string, driver BackupStoreDriver, v interface{}) error {
 	j, err := json.Marshal(v)
 	if err != nil {
 		return err
@@ -84,6 +84,49 @@ func saveConfigInBackupStore(filePath string, driver BackupStoreDriver, v interf
 	return nil
 }
 
+func SaveLocalFileToBackupStore(localFilePath, backupStoreFilePath string, driver BackupStoreDriver) error {
+	log := log.WithFields(logrus.Fields{
+		LogFieldReason:   LogReasonStart,
+		LogFieldObject:   LogObjectConfig,
+		LogFieldKind:     driver.Kind(),
+		LogFieldFilepath: localFilePath,
+		LogFieldDestURL:  backupStoreFilePath,
+	})
+	log.Debug()
+
+	if driver.FileExists(backupStoreFilePath) {
+		return fmt.Errorf("%v already exists", backupStoreFilePath)
+	}
+
+	if err := driver.Upload(localFilePath, backupStoreFilePath); err != nil {
+		return err
+	}
+
+	log.WithField(LogFieldReason, LogReasonComplete).Debug()
+	return nil
+}
+
+func SaveBackupStoreToLocalFile(backupStoreFileURL, localFilePath string, driver BackupStoreDriver) error {
+	log := log.WithFields(logrus.Fields{
+		LogFieldReason:    LogReasonStart,
+		LogFieldObject:    LogObjectConfig,
+		LogFieldKind:      driver.Kind(),
+		LogFieldFilepath:  localFilePath,
+		LogFieldSourceURL: backupStoreFileURL,
+	})
+	log.Debug()
+
+	if err := driver.Download(backupStoreFileURL, localFilePath); err != nil {
+		return err
+	}
+
+	log = log.WithFields(logrus.Fields{
+		LogFieldReason: LogReasonComplete,
+	})
+	log.Debug()
+	return nil
+}
+
 func volumeExists(volumeName string, driver BackupStoreDriver) bool {
 	volumeFile := getVolumeFilePath(volumeName)
 	return driver.FileExists(volumeFile)
@@ -108,7 +151,7 @@ func getVolumeNames(jobQueues *jobq.WorkerDispatcher, jobQueueTimeout time.Durat
 	volumePathBase := filepath.Join(backupstoreBase, VOLUME_DIRECTORY)
 	lv1Dirs, err := driver.List(volumePathBase)
 	if err != nil {
-		log.Warnf("failed to list first level dirs for path: %v reason: %v", volumePathBase, err)
+		log.WithError(err).Warnf("Failed to list first level dirs for path %v", volumePathBase)
 		return names, err
 	}
 
@@ -122,7 +165,7 @@ func getVolumeNames(jobQueues *jobq.WorkerDispatcher, jobQueueTimeout time.Durat
 		lv1Tracker := jobQueues.QueueTimedFunc(context.Background(), func(ctx context.Context) (interface{}, error) {
 			lv2Dirs, err := driver.List(path)
 			if err != nil {
-				log.Warnf("failed to list second level dirs for path: %v reason: %v", path, err)
+				log.WithError(err).Warnf("Failed to list second level dirs for path %v", path)
 				return nil, err
 			}
 
@@ -148,7 +191,7 @@ func getVolumeNames(jobQueues *jobq.WorkerDispatcher, jobQueueTimeout time.Durat
 			lv2Tracker := jobQueues.QueueTimedFunc(context.Background(), func(ctx context.Context) (interface{}, error) {
 				volumeNames, err := driver.List(path)
 				if err != nil {
-					log.Warnf("failed to list volume names for path: %v reason: %v", path, err)
+					log.WithError(err).Warnf("Failed to list volume names for path %v", path)
 					return nil, err
 				}
 				return volumeNames, nil
@@ -175,7 +218,7 @@ func getVolumeNames(jobQueues *jobq.WorkerDispatcher, jobQueueTimeout time.Durat
 func loadVolume(volumeName string, driver BackupStoreDriver) (*Volume, error) {
 	v := &Volume{}
 	file := getVolumeFilePath(volumeName)
-	if err := loadConfigInBackupStore(file, driver, v); err != nil {
+	if err := LoadConfigInBackupStore(file, driver, v); err != nil {
 		return nil, err
 	}
 	return v, nil
@@ -183,7 +226,7 @@ func loadVolume(volumeName string, driver BackupStoreDriver) (*Volume, error) {
 
 func saveVolume(v *Volume, driver BackupStoreDriver) error {
 	file := getVolumeFilePath(v.Name)
-	if err := saveConfigInBackupStore(file, driver, v); err != nil {
+	if err := SaveConfigInBackupStore(file, driver, v); err != nil {
 		return err
 	}
 	return nil
@@ -219,7 +262,7 @@ func backupExists(backupName, volumeName string, bsDriver BackupStoreDriver) boo
 
 func loadBackup(backupName, volumeName string, bsDriver BackupStoreDriver) (*Backup, error) {
 	backup := &Backup{}
-	if err := loadConfigInBackupStore(getBackupConfigPath(backupName, volumeName), bsDriver, backup); err != nil {
+	if err := LoadConfigInBackupStore(getBackupConfigPath(backupName, volumeName), bsDriver, backup); err != nil {
 		return nil, err
 	}
 	return backup, nil
@@ -230,7 +273,7 @@ func saveBackup(backup *Backup, bsDriver BackupStoreDriver) error {
 		return fmt.Errorf("missing volume specifier for backup: %v", backup.Name)
 	}
 	filePath := getBackupConfigPath(backup.Name, backup.VolumeName)
-	if err := saveConfigInBackupStore(filePath, bsDriver, backup); err != nil {
+	if err := SaveConfigInBackupStore(filePath, bsDriver, backup); err != nil {
 		return err
 	}
 	return nil
@@ -241,6 +284,6 @@ func removeBackup(backup *Backup, bsDriver BackupStoreDriver) error {
 	if err := bsDriver.Remove(filePath); err != nil {
 		return err
 	}
-	log.Debugf("Removed %v on backupstore", filePath)
+	log.Infof("Removed %v on backupstore", filePath)
 	return nil
 }
diff --git a/vendor/github.com/longhorn/backupstore/deltablock.go b/vendor/github.com/longhorn/backupstore/deltablock.go
index 28bd1b723..81f8fb0e4 100644
--- a/vendor/github.com/longhorn/backupstore/deltablock.go
+++ b/vendor/github.com/longhorn/backupstore/deltablock.go
@@ -7,6 +7,7 @@ import (
 	"path/filepath"
 	"time"
 
+	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 
 	. "github.com/longhorn/backupstore/logging"
@@ -101,7 +102,7 @@ const (
 
 func CreateDeltaBlockBackup(config *DeltaBackupConfig) (string, bool, error) {
 	if config == nil {
-		return "", false, fmt.Errorf("Invalid empty config for backup")
+		return "", false, fmt.Errorf("invalid empty config for backup")
 	}
 
 	volume := config.Volume
@@ -109,7 +110,7 @@ func CreateDeltaBlockBackup(config *DeltaBackupConfig) (string, bool, error) {
 	destURL := config.DestURL
 	deltaOps := config.DeltaOps
 	if deltaOps == nil {
-		return "", false, fmt.Errorf("Missing DeltaBlockBackupOperations")
+		return "", false, fmt.Errorf("missing DeltaBlockBackupOperations")
 	}
 
 	bsDriver, err := GetBackupStoreDriver(destURL)
@@ -182,6 +183,7 @@ func CreateDeltaBlockBackup(config *DeltaBackupConfig) (string, bool, error) {
 		LogFieldSnapshot:     snapshot.Name,
 		LogFieldLastSnapshot: backupRequest.getLastSnapshotName(),
 	}).Debug("Generating snapshot changed blocks config")
+
 	delta, err := deltaOps.CompareSnapshot(snapshot.Name, backupRequest.getLastSnapshotName(), volume.Name)
 	if err != nil {
 		deltaOps.CloseSnapshot(snapshot.Name, volume.Name)
@@ -426,13 +428,13 @@ func RestoreDeltaBlockBackup(config *DeltaRestoreConfig) error {
 	}
 
 	if vol.Size == 0 || vol.Size%DEFAULT_BLOCK_SIZE != 0 {
-		return fmt.Errorf("Read invalid volume size %v", vol.Size)
+		return fmt.Errorf("read invalid volume size %v", vol.Size)
 	}
 
 	if _, err := os.Stat(volDevName); err == nil {
 		logrus.Warnf("File %s for the restore exists, will remove and re-create it", volDevName)
 		if err := os.Remove(volDevName); err != nil {
-			return fmt.Errorf("failed to clean up the existing file %v before restore: %v", volDevName, err)
+			return errors.Wrapf(err, "failed to clean up the existing file %v before restore", volDevName)
 		}
 	}
 
@@ -579,7 +581,7 @@ func RestoreDeltaBlockBackupIncrementally(config *DeltaRestoreConfig) error {
 	if _, err := os.Stat(volDevName); err == nil {
 		logrus.Warnf("File %s for the incremental restore exists, will remove and re-create it", volDevName)
 		if err := os.Remove(volDevName); err != nil {
-			return fmt.Errorf("failed to clean up the existing file %v before incremental restore: %v", volDevName, err)
+			return errors.Wrapf(err, "failed to clean up the existing file %v before incremental restore", volDevName)
 		}
 	}
 
@@ -721,18 +723,14 @@ func DeleteBackupVolume(volumeName string, destURL string) error {
 		return err
 	}
 	defer lock.Unlock()
-	if err := removeVolume(volumeName, bsDriver); err != nil {
-		return err
-	}
-	return nil
+	return removeVolume(volumeName, bsDriver)
 }
 
 func checkBlockReferenceCount(blockInfos map[string]*BlockInfo, backup *Backup, volumeName string, driver BackupStoreDriver) {
 	for _, block := range backup.Blocks {
 		info, known := blockInfos[block.BlockChecksum]
 		if !known {
-			log.Errorf("backup %v refers to unknown block %v",
-				backup.Name, block.BlockChecksum)
+			log.Errorf("Backup %v refers to unknown block %v", backup.Name, block.BlockChecksum)
 			info = &BlockInfo{checksum: block.BlockChecksum}
 			blockInfos[block.BlockChecksum] = info
 		}
@@ -750,12 +748,12 @@ func getLatestBackup(backup *Backup, lastBackup *Backup) error {
 
 	backupTime, err := time.Parse(time.RFC3339, backup.SnapshotCreatedAt)
 	if err != nil {
-		return fmt.Errorf("Cannot parse backup %v time %v due to %v", backup.Name, backup.SnapshotCreatedAt, err)
+		return errors.Wrapf(err, "cannot parse backup %v time %v", backup.Name, backup.SnapshotCreatedAt)
 	}
 
 	lastBackupTime, err := time.Parse(time.RFC3339, lastBackup.SnapshotCreatedAt)
 	if err != nil {
-		return fmt.Errorf("Cannot parse last backup %v time %v due to %v", lastBackup.Name, lastBackup.SnapshotCreatedAt, err)
+		return errors.Wrapf(err, "cannot parse last backup %v time %v", lastBackup.Name, lastBackup.SnapshotCreatedAt)
 	}
 
 	if backupTime.After(lastBackupTime) {
@@ -792,7 +790,7 @@ func DeleteDeltaBlockBackup(backupURL string) error {
 	// If we fail to load the backup we still want to proceed with the deletion of the backup file
 	backupToBeDeleted, err := loadBackup(backupName, volumeName, bsDriver)
 	if err != nil {
-		log.WithError(err).Warn("failed to load to be deleted backup")
+		log.WithError(err).Warn("Failed to load to be deleted backup")
 		backupToBeDeleted = &Backup{
 			Name:       backupName,
 			VolumeName: volumeName,
@@ -807,7 +805,7 @@ func DeleteDeltaBlockBackup(backupURL string) error {
 
 	v, err := loadVolume(volumeName, bsDriver)
 	if err != nil {
-		return fmt.Errorf("Cannot find volume in backupstore due to: %v", err)
+		return errors.Wrap(err, "cannot find volume in backupstore")
 	}
 	updateLastBackup := false
 	if backupToBeDeleted.Name == v.LastBackupName {
@@ -820,7 +818,7 @@ func DeleteDeltaBlockBackup(backupURL string) error {
 	deleteBlocks := true
 	backupNames, err := getBackupNamesForVolume(volumeName, bsDriver)
 	if err != nil {
-		log.WithError(err).Warn("failed to load backup names, skip block deletion")
+		log.WithError(err).Warn("Failed to load backup names, skip block deletion")
 		deleteBlocks = false
 	}
 
@@ -842,7 +840,7 @@ func DeleteDeltaBlockBackup(backupURL string) error {
 		log := log.WithField("backup", name)
 		backup, err := loadBackup(name, volumeName, bsDriver)
 		if err != nil {
-			log.WithError(err).Warn("failed to load backup, skip block deletion")
+			log.WithError(err).Warn("Failed to load backup, skip block deletion")
 			deleteBlocks = false
 			break
 		}
@@ -861,7 +859,7 @@ func DeleteDeltaBlockBackup(backupURL string) error {
 		if updateLastBackup {
 			err := getLatestBackup(backup, lastBackup)
 			if err != nil {
-				log.WithError(err).Warn("failed to find last backup, skip block deletion")
+				log.WithError(err).Warn("Failed to find last backup, skip block deletion")
 				deleteBlocks = false
 				break
 			}
@@ -904,7 +902,7 @@ func cleanupBlocks(blockMap map[string]*BlockInfo, volume string, driver BackupS
 				deletionFailures = append(deletionFailures, blk.checksum)
 				continue
 			}
-			log.Debugf("deleted block %v for volume %v", blk.checksum, volume)
+			log.Debugf("Deleted block %v for volume %v", blk.checksum, volume)
 			deletedBlockCount++
 		} else if isBlockReferenced(blk) && isBlockPresent(blk) {
 			activeBlockCount++
diff --git a/vendor/github.com/longhorn/backupstore/driver.go b/vendor/github.com/longhorn/backupstore/driver.go
index d3079eaf7..443a13979 100644
--- a/vendor/github.com/longhorn/backupstore/driver.go
+++ b/vendor/github.com/longhorn/backupstore/driver.go
@@ -35,6 +35,10 @@ var (
 	log = logrus.WithFields(logrus.Fields{"pkg": "backupstore"})
 )
 
+func GetLog() logrus.FieldLogger {
+	return log
+}
+
 func generateError(fields logrus.Fields, format string, v ...interface{}) error {
 	return ErrorWithFields("backupstore", fields, format, v...)
 }
@@ -61,14 +65,14 @@ func unregisterDriver(kind string) error {
 
 func GetBackupStoreDriver(destURL string) (BackupStoreDriver, error) {
 	if destURL == "" {
-		return nil, fmt.Errorf("Destination URL hasn't been specified")
+		return nil, fmt.Errorf("destination URL hasn't been specified")
 	}
 	u, err := url.Parse(destURL)
 	if err != nil {
 		return nil, err
 	}
 	if _, exists := initializers[u.Scheme]; !exists {
-		return nil, fmt.Errorf("Driver %v is not supported!", u.Scheme)
+		return nil, fmt.Errorf("driver %v is not supported", u.Scheme)
 	}
 	return initializers[u.Scheme](destURL)
 }
diff --git a/vendor/github.com/longhorn/backupstore/fsops/fsops.go b/vendor/github.com/longhorn/backupstore/fsops/fsops.go
index fafe6d540..157ff9db1 100644
--- a/vendor/github.com/longhorn/backupstore/fsops/fsops.go
+++ b/vendor/github.com/longhorn/backupstore/fsops/fsops.go
@@ -29,10 +29,7 @@ func NewFileSystemOperator(ops FileSystemOps) *FileSystemOperator {
 }
 
 func (f *FileSystemOperator) preparePath(file string) error {
-	if err := os.MkdirAll(filepath.Dir(f.LocalPath(file)), os.ModeDir|0700); err != nil {
-		return err
-	}
-	return nil
+	return os.MkdirAll(filepath.Dir(f.LocalPath(file)), os.ModeDir|0700)
 }
 
 func (f *FileSystemOperator) FileSize(filePath string) int64 {
@@ -140,16 +137,10 @@ func (f *FileSystemOperator) Upload(src, dst string) error {
 		return err
 	}
 	_, err = util.Execute("mv", []string{f.LocalPath(tmpDst), f.LocalPath(dst)})
-	if err != nil {
-		return err
-	}
-	return nil
+	return err
 }
 
 func (f *FileSystemOperator) Download(src, dst string) error {
 	_, err := util.Execute("cp", []string{f.LocalPath(src), dst})
-	if err != nil {
-		return err
-	}
-	return nil
+	return err
 }
diff --git a/vendor/github.com/longhorn/backupstore/go.mod b/vendor/github.com/longhorn/backupstore/go.mod
index 79f8d8cc9..019378087 100644
--- a/vendor/github.com/longhorn/backupstore/go.mod
+++ b/vendor/github.com/longhorn/backupstore/go.mod
@@ -11,6 +11,7 @@ require (
 	github.com/spf13/afero v1.5.1
 	github.com/stretchr/testify v1.7.0
 	github.com/urfave/cli v1.14.0
+	golang.org/x/net v0.0.0-20200202094626-16171245cfb2
 	gopkg.in/check.v1 v1.0.0-20160105164936-4f90aeace3a2
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )
diff --git a/vendor/github.com/longhorn/backupstore/http/client.go b/vendor/github.com/longhorn/backupstore/http/client.go
index f2300e695..85fcdd5f0 100644
--- a/vendor/github.com/longhorn/backupstore/http/client.go
+++ b/vendor/github.com/longhorn/backupstore/http/client.go
@@ -5,6 +5,9 @@ import (
 	"crypto/x509"
 	"fmt"
 	"net/http"
+	"net/url"
+
+	"golang.org/x/net/http/httpproxy"
 )
 
 func getSystemCerts() *x509.CertPool {
@@ -43,6 +46,9 @@ func GetClient(insecure bool, customCerts []byte) (*http.Client, error) {
 		InsecureSkipVerify: insecure,
 		RootCAs:            certs,
 	}
+	customTransport.Proxy = func(request *http.Request) (*url.URL, error) {
+		return httpproxy.FromEnvironment().ProxyFunc()(request.URL)
+	}
 	client := &http.Client{Transport: customTransport}
 	return client, nil
 }
diff --git a/vendor/github.com/longhorn/backupstore/list.go b/vendor/github.com/longhorn/backupstore/list.go
index dde1babf2..9c7b74f61 100644
--- a/vendor/github.com/longhorn/backupstore/list.go
+++ b/vendor/github.com/longhorn/backupstore/list.go
@@ -51,11 +51,11 @@ type BackupInfo struct {
 
 func addListVolume(volumeName string, driver BackupStoreDriver, volumeOnly bool) (*VolumeInfo, error) {
 	if volumeName == "" {
-		return nil, fmt.Errorf("Invalid empty volume Name")
+		return nil, fmt.Errorf("invalid empty volume Name")
 	}
 
 	if !util.ValidateName(volumeName) {
-		return nil, fmt.Errorf("Invalid volume name %v", volumeName)
+		return nil, fmt.Errorf("invalid volume name %v", volumeName)
 	}
 
 	volumeInfo := &VolumeInfo{Messages: make(map[MessageType]string)}
diff --git a/vendor/github.com/longhorn/backupstore/lock.go b/vendor/github.com/longhorn/backupstore/lock.go
index e5a708856..6e3bc73bb 100644
--- a/vendor/github.com/longhorn/backupstore/lock.go
+++ b/vendor/github.com/longhorn/backupstore/lock.go
@@ -62,7 +62,7 @@ func (lock *FileLock) canAcquire() bool {
 	canAcquire := true
 	locks := getLocksForVolume(lock.volume, lock.driver)
 	file := getLockFilePath(lock.volume, lock.Name)
-	log.WithField("lock", lock).Debugf("trying to acquire lock %v", file)
+	log.WithField("lock", lock).Debugf("Trying to acquire lock %v", file)
 	log.Debugf("backupstore volume %v contains locks %v", lock.volume, locks)
 
 	for _, serverLock := range locks {
@@ -164,7 +164,7 @@ func (lock *FileLock) Unlock() error {
 func loadLock(volumeName string, name string, driver BackupStoreDriver) (*FileLock, error) {
 	lock := &FileLock{}
 	file := getLockFilePath(volumeName, name)
-	if err := loadConfigInBackupStore(file, driver, lock); err != nil {
+	if err := LoadConfigInBackupStore(file, driver, lock); err != nil {
 		return nil, err
 	}
 	lock.serverTime = driver.FileTime(file)
@@ -183,7 +183,7 @@ func removeLock(lock *FileLock) error {
 
 func saveLock(lock *FileLock) error {
 	file := getLockFilePath(lock.volume, lock.Name)
-	if err := saveConfigInBackupStore(file, lock.driver, lock); err != nil {
+	if err := SaveConfigInBackupStore(file, lock.driver, lock); err != nil {
 		return err
 	}
 	lock.serverTime = lock.driver.FileTime(file)
@@ -226,7 +226,7 @@ func getLocksForVolume(volumeName string, driver BackupStoreDriver) []*FileLock
 		lock, err := loadLock(volumeName, name, driver)
 		if err != nil {
 			file := getLockFilePath(volumeName, name)
-			log.Warnf("failed to load lock %v on backupstore reason %v", file, err)
+			log.WithError(err).Warnf("Failed to load lock %v on backupstore", file)
 			continue
 		}
 		locks = append(locks, lock)
diff --git a/vendor/github.com/longhorn/backupstore/logging/logging.go b/vendor/github.com/longhorn/backupstore/logging/logging.go
index e57d9e96e..c040e98d9 100644
--- a/vendor/github.com/longhorn/backupstore/logging/logging.go
+++ b/vendor/github.com/longhorn/backupstore/logging/logging.go
@@ -18,6 +18,7 @@ const (
 	LogFieldLastSnapshot = "last_snapshot"
 	LogEventBackupURL    = "backup_url"
 	LogFieldDestURL      = "dest_url"
+	LogFieldSourceURL    = "source_url"
 	LogFieldKind         = "kind"
 	LogFieldFilepath     = "filepath"
 
diff --git a/vendor/github.com/longhorn/backupstore/nfs/nfs.go b/vendor/github.com/longhorn/backupstore/nfs/nfs.go
index 15af7aea1..828f1473c 100644
--- a/vendor/github.com/longhorn/backupstore/nfs/nfs.go
+++ b/vendor/github.com/longhorn/backupstore/nfs/nfs.go
@@ -15,8 +15,9 @@ import (
 )
 
 var (
-	log           = logrus.WithFields(logrus.Fields{"pkg": "nfs"})
-	MinorVersions = []string{"4.2", "4.1", "4.0"}
+	log            = logrus.WithFields(logrus.Fields{"pkg": "nfs"})
+	MinorVersions  = []string{"4.2", "4.1", "4.0"}
+	defaultTimeout = 5 * time.Second
 )
 
 type BackupStoreDriver struct {
@@ -59,24 +60,24 @@ func initFunc(destURL string) (backupstore.BackupStoreDriver, error) {
 		return nil, fmt.Errorf("NFS path must follow: nfs://server:/path/ format")
 	}
 	if u.Path == "" {
-		return nil, fmt.Errorf("Cannot find nfs path")
+		return nil, fmt.Errorf("cannot find nfs path")
 	}
 
 	b.serverPath = u.Host + u.Path
 	b.mountDir = filepath.Join(MountDir, strings.TrimRight(strings.Replace(u.Host, ".", "_", -1), ":"), u.Path)
-	if _, err = util.ExecuteWithCustomTimeout("mkdir", []string{"-m", "700", "-p", b.mountDir}, 3*time.Second); err != nil {
-		return nil, fmt.Errorf("Cannot create mount directory %v for NFS server: %v", b.mountDir, err)
+	if _, err = util.ExecuteWithCustomTimeout("mkdir", []string{"-m", "700", "-p", b.mountDir}, defaultTimeout); err != nil {
+		return nil, errors.Wrapf(err, "cannot create mount directory %v for NFS server", b.mountDir)
 	}
 
 	if err := b.mount(); err != nil {
-		return nil, fmt.Errorf("Cannot mount nfs %v: %v", b.serverPath, err)
+		return nil, errors.Wrapf(err, "cannot mount nfs %v", b.serverPath)
 	}
 	if _, err := b.List(""); err != nil {
 		return nil, fmt.Errorf("NFS path %v doesn't exist or is not a directory", b.serverPath)
 	}
 
 	b.destURL = KIND + "://" + b.serverPath
-	log.Debugf("Loaded driver for %v", b.destURL)
+	log.Infof("Loaded driver for %v", b.destURL)
 	return b, nil
 }
 
@@ -88,8 +89,8 @@ func (b *BackupStoreDriver) mount() (err error) {
 	retErr := errors.New("Cannot mount using NFSv4")
 
 	for _, version := range MinorVersions {
-		log.Debugf("attempting mount for nfs path %v with nfsvers %v", b.serverPath, version)
-		_, err = util.Execute("mount", []string{"-t", "nfs4", "-o", fmt.Sprintf("nfsvers=%v", version), "-o", "actimeo=1", b.serverPath, b.mountDir})
+		log.Debugf("Attempting mount for nfs path %v with nfsvers %v", b.serverPath, version)
+		_, err = util.ExecuteWithCustomTimeout("mount", []string{"-t", "nfs4", "-o", fmt.Sprintf("nfsvers=%v", version), "-o", "actimeo=1", b.serverPath, b.mountDir}, defaultTimeout)
 		if err == nil {
 			return nil
 		}
diff --git a/vendor/github.com/longhorn/backupstore/s3/s3.go b/vendor/github.com/longhorn/backupstore/s3/s3.go
index aef885092..9a32f70ae 100644
--- a/vendor/github.com/longhorn/backupstore/s3/s3.go
+++ b/vendor/github.com/longhorn/backupstore/s3/s3.go
@@ -60,13 +60,12 @@ func initFunc(destURL string) (backupstore.BackupStoreDriver, error) {
 	}
 
 	// add custom ca to http client that is used by s3 service
-	if customCerts := getCustomCerts(); customCerts != nil {
-		client, err := http.GetClientWithCustomCerts(customCerts)
-		if err != nil {
-			return nil, err
-		}
-		b.service.Client = client
+	customCerts := getCustomCerts()
+	client, err := http.GetClientWithCustomCerts(customCerts)
+	if err != nil {
+		return nil, err
 	}
+	b.service.Client = client
 
 	//Leading '/' can cause mystery problems for s3
 	b.path = strings.TrimLeft(b.path, "/")
@@ -82,7 +81,7 @@ func initFunc(destURL string) (backupstore.BackupStoreDriver, error) {
 	}
 	b.destURL += "/" + b.path
 
-	log.Debugf("Loaded driver for %v", b.destURL)
+	log.Infof("Loaded driver for %v", b.destURL)
 	return b, nil
 }
 
@@ -114,7 +113,7 @@ func (s *BackupStoreDriver) List(listPath string) ([]string, error) {
 	path := s.updatePath(listPath) + "/"
 	contents, prefixes, err := s.service.ListObjects(path, "/")
 	if err != nil {
-		log.Error("Fail to list s3: ", err)
+		log.WithError(err).Error("Failed to list s3")
 		return result, err
 	}
 
@@ -195,11 +194,17 @@ func (s *BackupStoreDriver) Download(src, dst string) error {
 	if _, err := os.Stat(dst); err != nil {
 		os.Remove(dst)
 	}
+
+	if err := os.MkdirAll(filepath.Dir(dst), os.ModeDir|0700); err != nil {
+		return err
+	}
+
 	f, err := os.Create(dst)
 	if err != nil {
 		return err
 	}
 	defer f.Close()
+
 	path := s.updatePath(src)
 	rc, err := s.service.GetObject(path)
 	if err != nil {
@@ -208,8 +213,5 @@ func (s *BackupStoreDriver) Download(src, dst string) error {
 	defer rc.Close()
 
 	_, err = io.Copy(f, rc)
-	if err != nil {
-		return err
-	}
-	return nil
+	return err
 }
diff --git a/vendor/github.com/longhorn/backupstore/s3/s3_service.go b/vendor/github.com/longhorn/backupstore/s3/s3_service.go
index 6c516dcbd..6cee12e7d 100644
--- a/vendor/github.com/longhorn/backupstore/s3/s3_service.go
+++ b/vendor/github.com/longhorn/backupstore/s3/s3_service.go
@@ -10,6 +10,7 @@ import (
 	"github.com/aws/aws-sdk-go/aws/awserr"
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/s3"
+	"github.com/pkg/errors"
 )
 
 type Service struct {
@@ -163,12 +164,12 @@ func (s *Service) DeleteObjects(key string) error {
 
 	objects, _, err := s.ListObjects(key, "")
 	if err != nil {
-		return fmt.Errorf("failed to list objects with prefix %v before removing them error: %v", key, err)
+		return errors.Wrapf(err, "failed to list objects with prefix %v before removing them", key)
 	}
 
 	svc, err := s.New()
 	if err != nil {
-		return fmt.Errorf("failed to get a new s3 client instance before removing objects: %v", err)
+		return errors.Wrap(err, "failed to get a new s3 client instance before removing objects")
 	}
 	defer s.Close()
 
@@ -180,7 +181,7 @@ func (s *Service) DeleteObjects(key string) error {
 		})
 
 		if err != nil {
-			log.Errorf("failed to delete object: %v response: %v error: %v",
+			log.Errorf("Failed to delete object: %v response: %v error: %v",
 				aws.StringValue(object.Key), resp.String(), parseAwsError(err))
 			deletionFailures = append(deletionFailures, aws.StringValue(object.Key))
 		}
diff --git a/vendor/github.com/longhorn/backupstore/singlefile.go b/vendor/github.com/longhorn/backupstore/singlefile.go
index 24af97cb9..a959ff197 100644
--- a/vendor/github.com/longhorn/backupstore/singlefile.go
+++ b/vendor/github.com/longhorn/backupstore/singlefile.go
@@ -1,10 +1,10 @@
 package backupstore
 
 import (
-	"fmt"
 	"path/filepath"
 
 	"github.com/longhorn/backupstore/util"
+	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 
 	. "github.com/longhorn/backupstore/logging"
@@ -117,7 +117,7 @@ func DeleteSingleFileBackup(backupURL string) error {
 
 	_, err = loadVolume(volumeName, driver)
 	if err != nil {
-		return fmt.Errorf("Cannot find volume %v in backupstore due to: %v", volumeName, err)
+		return errors.Wrapf(err, "cannot find volume %v in backupstore", volumeName)
 	}
 
 	backup, err := loadBackup(backupName, volumeName, driver)
@@ -129,9 +129,5 @@ func DeleteSingleFileBackup(backupURL string) error {
 		return err
 	}
 
-	if err := removeBackup(backup, driver); err != nil {
-		return err
-	}
-
-	return nil
+	return removeBackup(backup, driver)
 }
diff --git a/vendor/github.com/longhorn/backupstore/util/util.go b/vendor/github.com/longhorn/backupstore/util/util.go
index be23b864b..ae31a1348 100644
--- a/vendor/github.com/longhorn/backupstore/util/util.go
+++ b/vendor/github.com/longhorn/backupstore/util/util.go
@@ -4,11 +4,13 @@ import (
 	"bytes"
 	"compress/gzip"
 	"context"
+	"crypto/sha256"
 	"crypto/sha512"
 	"encoding/hex"
 	"fmt"
 	"io"
 	"io/ioutil"
+	"os"
 	"os/exec"
 	"regexp"
 	"strings"
@@ -41,6 +43,21 @@ func GetChecksum(data []byte) string {
 	return checksum
 }
 
+func GetFileChecksum(filePath string) (string, error) {
+	f, err := os.Open(filePath)
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	h := sha256.New()
+	if _, err := io.Copy(h, f); err != nil {
+		return "", err
+	}
+
+	return hex.EncodeToString(h.Sum(nil)), nil
+}
+
 func CompressData(data []byte) (io.ReadSeeker, error) {
 	var b bytes.Buffer
 	w := gzip.NewWriter(&b)
@@ -154,11 +171,11 @@ func execute(ctx context.Context, binary string, args []string) (string, error)
 	case <-done:
 		break
 	case <-ctx.Done():
-		return "", fmt.Errorf("Timeout executing: %v %v, output %v, error %v", binary, args, string(output), err)
+		return "", fmt.Errorf("timeout executing: %v %v, output %v, error %v", binary, args, string(output), err)
 	}
 
 	if err != nil {
-		return "", fmt.Errorf("Failed to execute: %v %v, output %v, error %v", binary, args, string(output), err)
+		return "", fmt.Errorf("failed to execute: %v %v, output %v, error %v", binary, args, string(output), err)
 	}
 
 	return string(output), nil
diff --git a/vendor/github.com/longhorn/backupstore/vfs/vfs.go b/vendor/github.com/longhorn/backupstore/vfs/vfs.go
index 74d207ddd..6fbb0b7e8 100644
--- a/vendor/github.com/longhorn/backupstore/vfs/vfs.go
+++ b/vendor/github.com/longhorn/backupstore/vfs/vfs.go
@@ -60,7 +60,7 @@ func initFunc(destURL string) (backupstore.BackupStoreDriver, error) {
 	}
 
 	b.destURL = KIND + "://" + b.path
-	log.Debugf("Loaded driver for %v", b.destURL)
+	log.Infof("Loaded driver for %v", b.destURL)
 	return b, nil
 }
 
diff --git a/vendor/golang.org/x/net/http/httpproxy/proxy.go b/vendor/golang.org/x/net/http/httpproxy/proxy.go
new file mode 100644
index 000000000..163645b86
--- /dev/null
+++ b/vendor/golang.org/x/net/http/httpproxy/proxy.go
@@ -0,0 +1,370 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package httpproxy provides support for HTTP proxy determination
+// based on environment variables, as provided by net/http's
+// ProxyFromEnvironment function.
+//
+// The API is not subject to the Go 1 compatibility promise and may change at
+// any time.
+package httpproxy
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"net/url"
+	"os"
+	"strings"
+	"unicode/utf8"
+
+	"golang.org/x/net/idna"
+)
+
+// Config holds configuration for HTTP proxy settings. See
+// FromEnvironment for details.
+type Config struct {
+	// HTTPProxy represents the value of the HTTP_PROXY or
+	// http_proxy environment variable. It will be used as the proxy
+	// URL for HTTP requests and HTTPS requests unless overridden by
+	// HTTPSProxy or NoProxy.
+	HTTPProxy string
+
+	// HTTPSProxy represents the HTTPS_PROXY or https_proxy
+	// environment variable. It will be used as the proxy URL for
+	// HTTPS requests unless overridden by NoProxy.
+	HTTPSProxy string
+
+	// NoProxy represents the NO_PROXY or no_proxy environment
+	// variable. It specifies a string that contains comma-separated values
+	// specifying hosts that should be excluded from proxying. Each value is
+	// represented by an IP address prefix (1.2.3.4), an IP address prefix in
+	// CIDR notation (1.2.3.4/8), a domain name, or a special DNS label (*).
+	// An IP address prefix and domain name can also include a literal port
+	// number (1.2.3.4:80).
+	// A domain name matches that name and all subdomains. A domain name with
+	// a leading "." matches subdomains only. For example "foo.com" matches
+	// "foo.com" and "bar.foo.com"; ".y.com" matches "x.y.com" but not "y.com".
+	// A single asterisk (*) indicates that no proxying should be done.
+	// A best effort is made to parse the string and errors are
+	// ignored.
+	NoProxy string
+
+	// CGI holds whether the current process is running
+	// as a CGI handler (FromEnvironment infers this from the
+	// presence of a REQUEST_METHOD environment variable).
+	// When this is set, ProxyForURL will return an error
+	// when HTTPProxy applies, because a client could be
+	// setting HTTP_PROXY maliciously. See https://golang.org/s/cgihttpproxy.
+	CGI bool
+}
+
+// config holds the parsed configuration for HTTP proxy settings.
+type config struct {
+	// Config represents the original configuration as defined above.
+	Config
+
+	// httpsProxy is the parsed URL of the HTTPSProxy if defined.
+	httpsProxy *url.URL
+
+	// httpProxy is the parsed URL of the HTTPProxy if defined.
+	httpProxy *url.URL
+
+	// ipMatchers represent all values in the NoProxy that are IP address
+	// prefixes or an IP address in CIDR notation.
+	ipMatchers []matcher
+
+	// domainMatchers represent all values in the NoProxy that are a domain
+	// name or hostname & domain name
+	domainMatchers []matcher
+}
+
+// FromEnvironment returns a Config instance populated from the
+// environment variables HTTP_PROXY, HTTPS_PROXY and NO_PROXY (or the
+// lowercase versions thereof). HTTPS_PROXY takes precedence over
+// HTTP_PROXY for https requests.
+//
+// The environment values may be either a complete URL or a
+// "host[:port]", in which case the "http" scheme is assumed. An error
+// is returned if the value is a different form.
+func FromEnvironment() *Config {
+	return &Config{
+		HTTPProxy:  getEnvAny("HTTP_PROXY", "http_proxy"),
+		HTTPSProxy: getEnvAny("HTTPS_PROXY", "https_proxy"),
+		NoProxy:    getEnvAny("NO_PROXY", "no_proxy"),
+		CGI:        os.Getenv("REQUEST_METHOD") != "",
+	}
+}
+
+func getEnvAny(names ...string) string {
+	for _, n := range names {
+		if val := os.Getenv(n); val != "" {
+			return val
+		}
+	}
+	return ""
+}
+
+// ProxyFunc returns a function that determines the proxy URL to use for
+// a given request URL. Changing the contents of cfg will not affect
+// proxy functions created earlier.
+//
+// A nil URL and nil error are returned if no proxy is defined in the
+// environment, or a proxy should not be used for the given request, as
+// defined by NO_PROXY.
+//
+// As a special case, if req.URL.Host is "localhost" (with or without a
+// port number), then a nil URL and nil error will be returned.
+func (cfg *Config) ProxyFunc() func(reqURL *url.URL) (*url.URL, error) {
+	// Preprocess the Config settings for more efficient evaluation.
+	cfg1 := &config{
+		Config: *cfg,
+	}
+	cfg1.init()
+	return cfg1.proxyForURL
+}
+
+func (cfg *config) proxyForURL(reqURL *url.URL) (*url.URL, error) {
+	var proxy *url.URL
+	if reqURL.Scheme == "https" {
+		proxy = cfg.httpsProxy
+	}
+	if proxy == nil {
+		proxy = cfg.httpProxy
+		if proxy != nil && cfg.CGI {
+			return nil, errors.New("refusing to use HTTP_PROXY value in CGI environment; see golang.org/s/cgihttpproxy")
+		}
+	}
+	if proxy == nil {
+		return nil, nil
+	}
+	if !cfg.useProxy(canonicalAddr(reqURL)) {
+		return nil, nil
+	}
+
+	return proxy, nil
+}
+
+func parseProxy(proxy string) (*url.URL, error) {
+	if proxy == "" {
+		return nil, nil
+	}
+
+	proxyURL, err := url.Parse(proxy)
+	if err != nil ||
+		(proxyURL.Scheme != "http" &&
+			proxyURL.Scheme != "https" &&
+			proxyURL.Scheme != "socks5") {
+		// proxy was bogus. Try prepending "http://" to it and
+		// see if that parses correctly. If not, we fall
+		// through and complain about the original one.
+		if proxyURL, err := url.Parse("http://" + proxy); err == nil {
+			return proxyURL, nil
+		}
+	}
+	if err != nil {
+		return nil, fmt.Errorf("invalid proxy address %q: %v", proxy, err)
+	}
+	return proxyURL, nil
+}
+
+// useProxy reports whether requests to addr should use a proxy,
+// according to the NO_PROXY or no_proxy environment variable.
+// addr is always a canonicalAddr with a host and port.
+func (cfg *config) useProxy(addr string) bool {
+	if len(addr) == 0 {
+		return true
+	}
+	host, port, err := net.SplitHostPort(addr)
+	if err != nil {
+		return false
+	}
+	if host == "localhost" {
+		return false
+	}
+	ip := net.ParseIP(host)
+	if ip != nil {
+		if ip.IsLoopback() {
+			return false
+		}
+	}
+
+	addr = strings.ToLower(strings.TrimSpace(host))
+
+	if ip != nil {
+		for _, m := range cfg.ipMatchers {
+			if m.match(addr, port, ip) {
+				return false
+			}
+		}
+	}
+	for _, m := range cfg.domainMatchers {
+		if m.match(addr, port, ip) {
+			return false
+		}
+	}
+	return true
+}
+
+func (c *config) init() {
+	if parsed, err := parseProxy(c.HTTPProxy); err == nil {
+		c.httpProxy = parsed
+	}
+	if parsed, err := parseProxy(c.HTTPSProxy); err == nil {
+		c.httpsProxy = parsed
+	}
+
+	for _, p := range strings.Split(c.NoProxy, ",") {
+		p = strings.ToLower(strings.TrimSpace(p))
+		if len(p) == 0 {
+			continue
+		}
+
+		if p == "*" {
+			c.ipMatchers = []matcher{allMatch{}}
+			c.domainMatchers = []matcher{allMatch{}}
+			return
+		}
+
+		// IPv4/CIDR, IPv6/CIDR
+		if _, pnet, err := net.ParseCIDR(p); err == nil {
+			c.ipMatchers = append(c.ipMatchers, cidrMatch{cidr: pnet})
+			continue
+		}
+
+		// IPv4:port, [IPv6]:port
+		phost, pport, err := net.SplitHostPort(p)
+		if err == nil {
+			if len(phost) == 0 {
+				// There is no host part, likely the entry is malformed; ignore.
+				continue
+			}
+			if phost[0] == '[' && phost[len(phost)-1] == ']' {
+				phost = phost[1 : len(phost)-1]
+			}
+		} else {
+			phost = p
+		}
+		// IPv4, IPv6
+		if pip := net.ParseIP(phost); pip != nil {
+			c.ipMatchers = append(c.ipMatchers, ipMatch{ip: pip, port: pport})
+			continue
+		}
+
+		if len(phost) == 0 {
+			// There is no host part, likely the entry is malformed; ignore.
+			continue
+		}
+
+		// domain.com or domain.com:80
+		// foo.com matches bar.foo.com
+		// .domain.com or .domain.com:port
+		// *.domain.com or *.domain.com:port
+		if strings.HasPrefix(phost, "*.") {
+			phost = phost[1:]
+		}
+		matchHost := false
+		if phost[0] != '.' {
+			matchHost = true
+			phost = "." + phost
+		}
+		c.domainMatchers = append(c.domainMatchers, domainMatch{host: phost, port: pport, matchHost: matchHost})
+	}
+}
+
+var portMap = map[string]string{
+	"http":   "80",
+	"https":  "443",
+	"socks5": "1080",
+}
+
+// canonicalAddr returns url.Host but always with a ":port" suffix
+func canonicalAddr(url *url.URL) string {
+	addr := url.Hostname()
+	if v, err := idnaASCII(addr); err == nil {
+		addr = v
+	}
+	port := url.Port()
+	if port == "" {
+		port = portMap[url.Scheme]
+	}
+	return net.JoinHostPort(addr, port)
+}
+
+// Given a string of the form "host", "host:port", or "[ipv6::address]:port",
+// return true if the string includes a port.
+func hasPort(s string) bool { return strings.LastIndex(s, ":") > strings.LastIndex(s, "]") }
+
+func idnaASCII(v string) (string, error) {
+	// TODO: Consider removing this check after verifying performance is okay.
+	// Right now punycode verification, length checks, context checks, and the
+	// permissible character tests are all omitted. It also prevents the ToASCII
+	// call from salvaging an invalid IDN, when possible. As a result it may be
+	// possible to have two IDNs that appear identical to the user where the
+	// ASCII-only version causes an error downstream whereas the non-ASCII
+	// version does not.
+	// Note that for correct ASCII IDNs ToASCII will only do considerably more
+	// work, but it will not cause an allocation.
+	if isASCII(v) {
+		return v, nil
+	}
+	return idna.Lookup.ToASCII(v)
+}
+
+func isASCII(s string) bool {
+	for i := 0; i < len(s); i++ {
+		if s[i] >= utf8.RuneSelf {
+			return false
+		}
+	}
+	return true
+}
+
+// matcher represents the matching rule for a given value in the NO_PROXY list
+type matcher interface {
+	// match returns true if the host and optional port or ip and optional port
+	// are allowed
+	match(host, port string, ip net.IP) bool
+}
+
+// allMatch matches on all possible inputs
+type allMatch struct{}
+
+func (a allMatch) match(host, port string, ip net.IP) bool {
+	return true
+}
+
+type cidrMatch struct {
+	cidr *net.IPNet
+}
+
+func (m cidrMatch) match(host, port string, ip net.IP) bool {
+	return m.cidr.Contains(ip)
+}
+
+type ipMatch struct {
+	ip   net.IP
+	port string
+}
+
+func (m ipMatch) match(host, port string, ip net.IP) bool {
+	if m.ip.Equal(ip) {
+		return m.port == "" || m.port == port
+	}
+	return false
+}
+
+type domainMatch struct {
+	host string
+	port string
+
+	matchHost bool
+}
+
+func (m domainMatch) match(host, port string, ip net.IP) bool {
+	if strings.HasSuffix(host, m.host) || (m.matchHost && host == m.host[1:]) {
+		return m.port == "" || m.port == port
+	}
+	return false
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 76995775a..dc61d51f2 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -68,7 +68,7 @@ github.com/gorilla/handlers
 github.com/honestbee/jobq
 # github.com/jmespath/go-jmespath v0.3.0
 github.com/jmespath/go-jmespath
-# github.com/longhorn/backupstore v0.0.0-20220913112826-5f5c95274f2a
+# github.com/longhorn/backupstore v0.0.0-20230306022849-8d5e216c3b33
 github.com/longhorn/backupstore
 github.com/longhorn/backupstore/fsops
 github.com/longhorn/backupstore/http
@@ -115,6 +115,7 @@ github.com/willf/bitset
 # golang.org/x/net v0.0.0-20200202094626-16171245cfb2
 golang.org/x/net/context
 golang.org/x/net/http/httpguts
+golang.org/x/net/http/httpproxy
 golang.org/x/net/http2
 golang.org/x/net/http2/hpack
 golang.org/x/net/idna