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minio/pkg/donut/donut-v1.go

716 lines
23 KiB

/*
* Minio Cloud Storage, (C) 2015 Minio, 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package donut
import (
"encoding/base64"
"encoding/hex"
"encoding/json"
"encoding/xml"
"fmt"
"io"
"io/ioutil"
"math/rand"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
"time"
"github.com/minio/minio/pkg/crypto/sha256"
"github.com/minio/minio/pkg/crypto/sha512"
"github.com/minio/minio/pkg/donut/disk"
"github.com/minio/minio/pkg/iodine"
)
// config files used inside Donut
const (
// bucket, object metadata
bucketMetadataConfig = "bucketMetadata.json"
objectMetadataConfig = "objectMetadata.json"
// versions
objectMetadataVersion = "1.0.0"
bucketMetadataVersion = "1.0.0"
)
/// v1 API functions
// makeBucket - make a new bucket
func (donut API) makeBucket(bucket string, acl BucketACL) error {
if bucket == "" || strings.TrimSpace(bucket) == "" {
return iodine.New(InvalidArgument{}, nil)
}
return donut.makeDonutBucket(bucket, acl.String())
}
// getBucketMetadata - get bucket metadata
func (donut API) getBucketMetadata(bucketName string) (BucketMetadata, error) {
if err := donut.listDonutBuckets(); err != nil {
return BucketMetadata{}, iodine.New(err, nil)
}
if _, ok := donut.buckets[bucketName]; !ok {
return BucketMetadata{}, iodine.New(BucketNotFound{Bucket: bucketName}, nil)
}
metadata, err := donut.getDonutBucketMetadata()
if err != nil {
return BucketMetadata{}, iodine.New(err, nil)
}
return metadata.Buckets[bucketName], nil
}
// setBucketMetadata - set bucket metadata
func (donut API) setBucketMetadata(bucketName string, bucketMetadata map[string]string) error {
if err := donut.listDonutBuckets(); err != nil {
return iodine.New(err, nil)
}
metadata, err := donut.getDonutBucketMetadata()
if err != nil {
return iodine.New(err, nil)
}
oldBucketMetadata := metadata.Buckets[bucketName]
acl, ok := bucketMetadata["acl"]
if !ok {
return iodine.New(InvalidArgument{}, nil)
}
oldBucketMetadata.ACL = BucketACL(acl)
metadata.Buckets[bucketName] = oldBucketMetadata
return donut.setDonutBucketMetadata(metadata)
}
// listBuckets - return list of buckets
func (donut API) listBuckets() (map[string]BucketMetadata, error) {
if err := donut.listDonutBuckets(); err != nil {
return nil, iodine.New(err, nil)
}
metadata, err := donut.getDonutBucketMetadata()
if err != nil {
// intentionally left out the error when Donut is empty
// but we need to revisit this area in future - since we need
// to figure out between acceptable and unacceptable errors
return make(map[string]BucketMetadata), nil
}
if metadata == nil {
return make(map[string]BucketMetadata), nil
}
return metadata.Buckets, nil
}
// listObjects - return list of objects
func (donut API) listObjects(bucket, prefix, marker, delimiter string, maxkeys int) (ListObjectsResults, error) {
errParams := map[string]string{
"bucket": bucket,
"prefix": prefix,
"marker": marker,
"delimiter": delimiter,
"maxkeys": strconv.Itoa(maxkeys),
}
if err := donut.listDonutBuckets(); err != nil {
return ListObjectsResults{}, iodine.New(err, errParams)
}
if _, ok := donut.buckets[bucket]; !ok {
return ListObjectsResults{}, iodine.New(BucketNotFound{Bucket: bucket}, errParams)
}
listObjects, err := donut.buckets[bucket].ListObjects(prefix, marker, delimiter, maxkeys)
if err != nil {
return ListObjectsResults{}, iodine.New(err, errParams)
}
return listObjects, nil
}
// putObject - put object
func (donut API) putObject(bucket, object, expectedMD5Sum string, reader io.Reader, size int64, metadata map[string]string, signature *Signature) (ObjectMetadata, error) {
errParams := map[string]string{
"bucket": bucket,
"object": object,
}
if bucket == "" || strings.TrimSpace(bucket) == "" {
return ObjectMetadata{}, iodine.New(InvalidArgument{}, errParams)
}
if object == "" || strings.TrimSpace(object) == "" {
return ObjectMetadata{}, iodine.New(InvalidArgument{}, errParams)
}
if err := donut.listDonutBuckets(); err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
if _, ok := donut.buckets[bucket]; !ok {
return ObjectMetadata{}, iodine.New(BucketNotFound{Bucket: bucket}, nil)
}
bucketMeta, err := donut.getDonutBucketMetadata()
if err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
if _, ok := bucketMeta.Buckets[bucket].BucketObjects[object]; ok {
return ObjectMetadata{}, iodine.New(ObjectExists{Object: object}, errParams)
}
objMetadata, err := donut.buckets[bucket].WriteObject(object, reader, size, expectedMD5Sum, metadata, signature)
if err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
bucketMeta.Buckets[bucket].BucketObjects[object] = struct{}{}
if err := donut.setDonutBucketMetadata(bucketMeta); err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
return objMetadata, nil
}
// putObject - put object
func (donut API) putObjectPart(bucket, object, expectedMD5Sum, uploadID string, partID int, reader io.Reader, size int64, metadata map[string]string, signature *Signature) (PartMetadata, error) {
errParams := map[string]string{
"bucket": bucket,
"object": object,
}
if bucket == "" || strings.TrimSpace(bucket) == "" {
return PartMetadata{}, iodine.New(InvalidArgument{}, errParams)
}
if object == "" || strings.TrimSpace(object) == "" {
return PartMetadata{}, iodine.New(InvalidArgument{}, errParams)
}
if err := donut.listDonutBuckets(); err != nil {
return PartMetadata{}, iodine.New(err, errParams)
}
if _, ok := donut.buckets[bucket]; !ok {
return PartMetadata{}, iodine.New(BucketNotFound{Bucket: bucket}, nil)
}
bucketMeta, err := donut.getDonutBucketMetadata()
if err != nil {
return PartMetadata{}, iodine.New(err, errParams)
}
if _, ok := bucketMeta.Buckets[bucket].Multiparts[object]; !ok {
return PartMetadata{}, iodine.New(InvalidUploadID{UploadID: uploadID}, nil)
}
if _, ok := bucketMeta.Buckets[bucket].BucketObjects[object]; ok {
return PartMetadata{}, iodine.New(ObjectExists{Object: object}, errParams)
}
objectPart := object + "/" + "multipart" + "/" + strconv.Itoa(partID)
objmetadata, err := donut.buckets[bucket].WriteObject(objectPart, reader, size, expectedMD5Sum, metadata, signature)
if err != nil {
return PartMetadata{}, iodine.New(err, errParams)
}
partMetadata := PartMetadata{
PartNumber: partID,
LastModified: objmetadata.Created,
ETag: objmetadata.MD5Sum,
Size: objmetadata.Size,
}
multipartSession := bucketMeta.Buckets[bucket].Multiparts[object]
multipartSession.Parts[strconv.Itoa(partID)] = partMetadata
bucketMeta.Buckets[bucket].Multiparts[object] = multipartSession
if err := donut.setDonutBucketMetadata(bucketMeta); err != nil {
return PartMetadata{}, iodine.New(err, errParams)
}
return partMetadata, nil
}
// getObject - get object
func (donut API) getObject(bucket, object string) (reader io.ReadCloser, size int64, err error) {
errParams := map[string]string{
"bucket": bucket,
"object": object,
}
if bucket == "" || strings.TrimSpace(bucket) == "" {
return nil, 0, iodine.New(InvalidArgument{}, errParams)
}
if object == "" || strings.TrimSpace(object) == "" {
return nil, 0, iodine.New(InvalidArgument{}, errParams)
}
if err := donut.listDonutBuckets(); err != nil {
return nil, 0, iodine.New(err, nil)
}
if _, ok := donut.buckets[bucket]; !ok {
return nil, 0, iodine.New(BucketNotFound{Bucket: bucket}, errParams)
}
return donut.buckets[bucket].ReadObject(object)
}
// getObjectMetadata - get object metadata
func (donut API) getObjectMetadata(bucket, object string) (ObjectMetadata, error) {
errParams := map[string]string{
"bucket": bucket,
"object": object,
}
if err := donut.listDonutBuckets(); err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
if _, ok := donut.buckets[bucket]; !ok {
return ObjectMetadata{}, iodine.New(BucketNotFound{Bucket: bucket}, errParams)
}
bucketMeta, err := donut.getDonutBucketMetadata()
if err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
if _, ok := bucketMeta.Buckets[bucket].BucketObjects[object]; !ok {
return ObjectMetadata{}, iodine.New(ObjectNotFound{Object: object}, errParams)
}
objectMetadata, err := donut.buckets[bucket].GetObjectMetadata(object)
if err != nil {
return ObjectMetadata{}, iodine.New(err, nil)
}
return objectMetadata, nil
}
// newMultipartUpload - new multipart upload request
func (donut API) newMultipartUpload(bucket, object, contentType string) (string, error) {
errParams := map[string]string{
"bucket": bucket,
"object": object,
"contentType": contentType,
}
if err := donut.listDonutBuckets(); err != nil {
return "", iodine.New(err, errParams)
}
if _, ok := donut.buckets[bucket]; !ok {
return "", iodine.New(BucketNotFound{Bucket: bucket}, errParams)
}
allbuckets, err := donut.getDonutBucketMetadata()
if err != nil {
return "", iodine.New(err, errParams)
}
bucketMetadata := allbuckets.Buckets[bucket]
multiparts := make(map[string]MultiPartSession)
if len(bucketMetadata.Multiparts) > 0 {
multiparts = bucketMetadata.Multiparts
}
id := []byte(strconv.Itoa(rand.Int()) + bucket + object + time.Now().String())
uploadIDSum := sha512.Sum512(id)
uploadID := base64.URLEncoding.EncodeToString(uploadIDSum[:])[:47]
multipartSession := MultiPartSession{
UploadID: uploadID,
Initiated: time.Now().UTC(),
Parts: make(map[string]PartMetadata),
TotalParts: 0,
}
multiparts[object] = multipartSession
bucketMetadata.Multiparts = multiparts
allbuckets.Buckets[bucket] = bucketMetadata
if err := donut.setDonutBucketMetadata(allbuckets); err != nil {
return "", iodine.New(err, errParams)
}
return uploadID, nil
}
// listObjectParts list all object parts
func (donut API) listObjectParts(bucket, object string, resources ObjectResourcesMetadata) (ObjectResourcesMetadata, error) {
errParams := map[string]string{
"bucket": bucket,
"object": object,
}
if bucket == "" || strings.TrimSpace(bucket) == "" {
return ObjectResourcesMetadata{}, iodine.New(InvalidArgument{}, errParams)
}
if object == "" || strings.TrimSpace(object) == "" {
return ObjectResourcesMetadata{}, iodine.New(InvalidArgument{}, errParams)
}
if err := donut.listDonutBuckets(); err != nil {
return ObjectResourcesMetadata{}, iodine.New(err, nil)
}
if _, ok := donut.buckets[bucket]; !ok {
return ObjectResourcesMetadata{}, iodine.New(BucketNotFound{Bucket: bucket}, errParams)
}
allBuckets, err := donut.getDonutBucketMetadata()
if err != nil {
return ObjectResourcesMetadata{}, iodine.New(err, errParams)
}
bucketMetadata := allBuckets.Buckets[bucket]
if _, ok := bucketMetadata.Multiparts[object]; !ok {
return ObjectResourcesMetadata{}, iodine.New(InvalidUploadID{UploadID: resources.UploadID}, errParams)
}
if bucketMetadata.Multiparts[object].UploadID != resources.UploadID {
return ObjectResourcesMetadata{}, iodine.New(InvalidUploadID{UploadID: resources.UploadID}, errParams)
}
objectResourcesMetadata := resources
objectResourcesMetadata.Bucket = bucket
objectResourcesMetadata.Key = object
var parts []*PartMetadata
var startPartNumber int
switch {
case objectResourcesMetadata.PartNumberMarker == 0:
startPartNumber = 1
default:
startPartNumber = objectResourcesMetadata.PartNumberMarker
}
for i := startPartNumber; i <= bucketMetadata.Multiparts[object].TotalParts; i++ {
if len(parts) > objectResourcesMetadata.MaxParts {
sort.Sort(partNumber(parts))
objectResourcesMetadata.IsTruncated = true
objectResourcesMetadata.Part = parts
objectResourcesMetadata.NextPartNumberMarker = i
return objectResourcesMetadata, nil
}
part, ok := bucketMetadata.Multiparts[object].Parts[strconv.Itoa(i)]
if !ok {
return ObjectResourcesMetadata{}, iodine.New(InvalidPart{}, nil)
}
parts = append(parts, &part)
}
sort.Sort(partNumber(parts))
objectResourcesMetadata.Part = parts
return objectResourcesMetadata, nil
}
// completeMultipartUpload complete an incomplete multipart upload
func (donut API) completeMultipartUpload(bucket, object, uploadID string, data io.Reader, signature *Signature) (ObjectMetadata, error) {
errParams := map[string]string{
"bucket": bucket,
"object": object,
"uploadID": uploadID,
}
if bucket == "" || strings.TrimSpace(bucket) == "" {
return ObjectMetadata{}, iodine.New(InvalidArgument{}, errParams)
}
if object == "" || strings.TrimSpace(object) == "" {
return ObjectMetadata{}, iodine.New(InvalidArgument{}, errParams)
}
if err := donut.listDonutBuckets(); err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
if _, ok := donut.buckets[bucket]; !ok {
return ObjectMetadata{}, iodine.New(BucketNotFound{Bucket: bucket}, errParams)
}
allBuckets, err := donut.getDonutBucketMetadata()
if err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
bucketMetadata := allBuckets.Buckets[bucket]
if _, ok := bucketMetadata.Multiparts[object]; !ok {
return ObjectMetadata{}, iodine.New(InvalidUploadID{UploadID: uploadID}, errParams)
}
if bucketMetadata.Multiparts[object].UploadID != uploadID {
return ObjectMetadata{}, iodine.New(InvalidUploadID{UploadID: uploadID}, errParams)
}
partBytes, err := ioutil.ReadAll(data)
if err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
if signature != nil {
ok, err := signature.DoesSignatureMatch(hex.EncodeToString(sha256.Sum256(partBytes)[:]))
if err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
if !ok {
return ObjectMetadata{}, iodine.New(SignatureDoesNotMatch{}, errParams)
}
}
parts := &CompleteMultipartUpload{}
if err := xml.Unmarshal(partBytes, parts); err != nil {
return ObjectMetadata{}, iodine.New(MalformedXML{}, errParams)
}
if !sort.IsSorted(completedParts(parts.Part)) {
return ObjectMetadata{}, iodine.New(InvalidPartOrder{}, errParams)
}
for _, part := range parts.Part {
if strings.Trim(part.ETag, "\"") != bucketMetadata.Multiparts[object].Parts[strconv.Itoa(part.PartNumber)].ETag {
return ObjectMetadata{}, iodine.New(InvalidPart{}, errParams)
}
}
var finalETagBytes []byte
var finalSize int64
totalParts := strconv.Itoa(bucketMetadata.Multiparts[object].TotalParts)
for _, part := range bucketMetadata.Multiparts[object].Parts {
partETagBytes, err := hex.DecodeString(part.ETag)
if err != nil {
return ObjectMetadata{}, iodine.New(err, errParams)
}
finalETagBytes = append(finalETagBytes, partETagBytes...)
finalSize += part.Size
}
finalETag := hex.EncodeToString(finalETagBytes)
objMetadata := ObjectMetadata{}
objMetadata.MD5Sum = finalETag + "-" + totalParts
objMetadata.Object = object
objMetadata.Bucket = bucket
objMetadata.Size = finalSize
objMetadata.Created = bucketMetadata.Multiparts[object].Parts[totalParts].LastModified
return objMetadata, nil
}
// listMultipartUploads list all multipart uploads
func (donut API) listMultipartUploads(bucket string, resources BucketMultipartResourcesMetadata) (BucketMultipartResourcesMetadata, error) {
errParams := map[string]string{
"bucket": bucket,
}
if err := donut.listDonutBuckets(); err != nil {
return BucketMultipartResourcesMetadata{}, iodine.New(err, errParams)
}
if _, ok := donut.buckets[bucket]; !ok {
return BucketMultipartResourcesMetadata{}, iodine.New(BucketNotFound{Bucket: bucket}, errParams)
}
allbuckets, err := donut.getDonutBucketMetadata()
if err != nil {
return BucketMultipartResourcesMetadata{}, iodine.New(err, errParams)
}
bucketMetadata := allbuckets.Buckets[bucket]
var uploads []*UploadMetadata
for key, session := range bucketMetadata.Multiparts {
if strings.HasPrefix(key, resources.Prefix) {
if len(uploads) > resources.MaxUploads {
sort.Sort(byKey(uploads))
resources.Upload = uploads
resources.NextKeyMarker = key
resources.NextUploadIDMarker = session.UploadID
resources.IsTruncated = true
return resources, nil
}
// uploadIDMarker is ignored if KeyMarker is empty
switch {
case resources.KeyMarker != "" && resources.UploadIDMarker == "":
if key > resources.KeyMarker {
upload := new(UploadMetadata)
upload.Key = key
upload.UploadID = session.UploadID
upload.Initiated = session.Initiated
uploads = append(uploads, upload)
}
case resources.KeyMarker != "" && resources.UploadIDMarker != "":
if session.UploadID > resources.UploadIDMarker {
if key >= resources.KeyMarker {
upload := new(UploadMetadata)
upload.Key = key
upload.UploadID = session.UploadID
upload.Initiated = session.Initiated
uploads = append(uploads, upload)
}
}
default:
upload := new(UploadMetadata)
upload.Key = key
upload.UploadID = session.UploadID
upload.Initiated = session.Initiated
uploads = append(uploads, upload)
}
}
}
sort.Sort(byKey(uploads))
resources.Upload = uploads
return resources, nil
}
// abortMultipartUpload - abort a incomplete multipart upload
func (donut API) abortMultipartUpload(bucket, object, uploadID string) error {
errParams := map[string]string{
"bucket": bucket,
"object": object,
"uploadID": uploadID,
}
if err := donut.listDonutBuckets(); err != nil {
return iodine.New(err, errParams)
}
if _, ok := donut.buckets[bucket]; !ok {
return iodine.New(BucketNotFound{Bucket: bucket}, errParams)
}
allbuckets, err := donut.getDonutBucketMetadata()
if err != nil {
return iodine.New(err, errParams)
}
bucketMetadata := allbuckets.Buckets[bucket]
if _, ok := bucketMetadata.Multiparts[object]; !ok {
return iodine.New(InvalidUploadID{UploadID: uploadID}, errParams)
}
if bucketMetadata.Multiparts[object].UploadID != uploadID {
return iodine.New(InvalidUploadID{UploadID: uploadID}, errParams)
}
delete(bucketMetadata.Multiparts, object)
allbuckets.Buckets[bucket] = bucketMetadata
if err := donut.setDonutBucketMetadata(allbuckets); err != nil {
return iodine.New(err, errParams)
}
return nil
}
//// internal functions
// getBucketMetadataWriters -
func (donut API) getBucketMetadataWriters() ([]io.WriteCloser, error) {
var writers []io.WriteCloser
for _, node := range donut.nodes {
disks, err := node.ListDisks()
if err != nil {
return nil, iodine.New(err, nil)
}
writers = make([]io.WriteCloser, len(disks))
for order, disk := range disks {
bucketMetaDataWriter, err := disk.CreateFile(filepath.Join(donut.config.DonutName, bucketMetadataConfig))
if err != nil {
return nil, iodine.New(err, nil)
}
writers[order] = bucketMetaDataWriter
}
}
return writers, nil
}
// getBucketMetadataReaders - readers are returned in map rather than slice
func (donut API) getBucketMetadataReaders() (map[int]io.ReadCloser, error) {
readers := make(map[int]io.ReadCloser)
disks := make(map[int]disk.Disk)
var err error
for _, node := range donut.nodes {
nDisks, err := node.ListDisks()
if err != nil {
return nil, iodine.New(err, nil)
}
for k, v := range nDisks {
disks[k] = v
}
}
var bucketMetaDataReader io.ReadCloser
for order, disk := range disks {
bucketMetaDataReader, err = disk.OpenFile(filepath.Join(donut.config.DonutName, bucketMetadataConfig))
if err != nil {
continue
}
readers[order] = bucketMetaDataReader
}
if err != nil {
return nil, iodine.New(err, nil)
}
return readers, nil
}
// setDonutBucketMetadata -
func (donut API) setDonutBucketMetadata(metadata *AllBuckets) error {
writers, err := donut.getBucketMetadataWriters()
if err != nil {
return iodine.New(err, nil)
}
for _, writer := range writers {
jenc := json.NewEncoder(writer)
if err := jenc.Encode(metadata); err != nil {
CleanupWritersOnError(writers)
return iodine.New(err, nil)
}
}
for _, writer := range writers {
writer.Close()
}
return nil
}
// getDonutBucketMetadata -
func (donut API) getDonutBucketMetadata() (*AllBuckets, error) {
metadata := &AllBuckets{}
var err error
readers, err := donut.getBucketMetadataReaders()
if err != nil {
return nil, iodine.New(err, nil)
}
for _, reader := range readers {
defer reader.Close()
}
for _, reader := range readers {
jenc := json.NewDecoder(reader)
if err = jenc.Decode(metadata); err == nil {
return metadata, nil
}
}
return nil, iodine.New(err, nil)
}
// makeDonutBucket -
func (donut API) makeDonutBucket(bucketName, acl string) error {
if err := donut.listDonutBuckets(); err != nil {
return iodine.New(err, nil)
}
if _, ok := donut.buckets[bucketName]; ok {
return iodine.New(BucketExists{Bucket: bucketName}, nil)
}
bucket, bucketMetadata, err := newBucket(bucketName, acl, donut.config.DonutName, donut.nodes)
if err != nil {
return iodine.New(err, nil)
}
nodeNumber := 0
donut.buckets[bucketName] = bucket
for _, node := range donut.nodes {
disks, err := node.ListDisks()
if err != nil {
return iodine.New(err, nil)
}
for order, disk := range disks {
bucketSlice := fmt.Sprintf("%s$%d$%d", bucketName, nodeNumber, order)
err := disk.MakeDir(filepath.Join(donut.config.DonutName, bucketSlice))
if err != nil {
return iodine.New(err, nil)
}
}
nodeNumber = nodeNumber + 1
}
metadata, err := donut.getDonutBucketMetadata()
if err != nil {
if os.IsNotExist(iodine.ToError(err)) {
metadata := new(AllBuckets)
metadata.Buckets = make(map[string]BucketMetadata)
metadata.Buckets[bucketName] = bucketMetadata
err = donut.setDonutBucketMetadata(metadata)
if err != nil {
return iodine.New(err, nil)
}
return nil
}
return iodine.New(err, nil)
}
metadata.Buckets[bucketName] = bucketMetadata
err = donut.setDonutBucketMetadata(metadata)
if err != nil {
return iodine.New(err, nil)
}
return nil
}
// listDonutBuckets -
func (donut API) listDonutBuckets() error {
var disks map[int]disk.Disk
var err error
for _, node := range donut.nodes {
disks, err = node.ListDisks()
if err != nil {
return iodine.New(err, nil)
}
}
var dirs []os.FileInfo
for _, disk := range disks {
dirs, err = disk.ListDir(donut.config.DonutName)
if err == nil {
break
}
}
// if all disks are missing then return error
if err != nil {
return iodine.New(err, nil)
}
for _, dir := range dirs {
splitDir := strings.Split(dir.Name(), "$")
if len(splitDir) < 3 {
return iodine.New(CorruptedBackend{Backend: dir.Name()}, nil)
}
bucketName := splitDir[0]
// we dont need this once we cache from makeDonutBucket()
bucket, _, err := newBucket(bucketName, "private", donut.config.DonutName, donut.nodes)
if err != nil {
return iodine.New(err, nil)
}
donut.buckets[bucketName] = bucket
}
return nil
}