mirror of
https://github.com/minio/minio.git
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682 lines
21 KiB
Go
682 lines
21 KiB
Go
/*
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* Minio Cloud Storage, (C) 2015 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package xl
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import (
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"encoding/base64"
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"encoding/hex"
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"encoding/json"
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"encoding/xml"
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"fmt"
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"io"
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"io/ioutil"
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"math/rand"
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"os"
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"path/filepath"
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"sort"
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"strconv"
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"strings"
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"time"
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"github.com/minio/minio/pkg/crypto/sha256"
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"github.com/minio/minio/pkg/crypto/sha512"
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"github.com/minio/minio/pkg/probe"
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"github.com/minio/minio/pkg/s3/signature4"
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"github.com/minio/minio/pkg/xl/block"
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)
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// config files used inside XL
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const (
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// bucket, object metadata
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bucketMetadataConfig = "bucketMetadata.json"
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objectMetadataConfig = "objectMetadata.json"
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// versions
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objectMetadataVersion = "1.0.0"
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bucketMetadataVersion = "1.0.0"
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)
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/// v1 API functions
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// makeBucket - make a new bucket
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func (xl API) makeBucket(bucket string, acl BucketACL) *probe.Error {
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if bucket == "" || strings.TrimSpace(bucket) == "" {
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return probe.NewError(InvalidArgument{})
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}
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return xl.makeXLBucket(bucket, acl.String())
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}
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// getBucketMetadata - get bucket metadata
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func (xl API) getBucketMetadata(bucketName string) (BucketMetadata, *probe.Error) {
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if err := xl.listXLBuckets(); err != nil {
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return BucketMetadata{}, err.Trace()
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}
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if _, ok := xl.buckets[bucketName]; !ok {
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return BucketMetadata{}, probe.NewError(BucketNotFound{Bucket: bucketName})
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}
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metadata, err := xl.getXLBucketMetadata()
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if err != nil {
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return BucketMetadata{}, err.Trace()
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}
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return metadata.Buckets[bucketName], nil
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}
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// setBucketMetadata - set bucket metadata
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func (xl API) setBucketMetadata(bucketName string, bucketMetadata map[string]string) *probe.Error {
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if err := xl.listXLBuckets(); err != nil {
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return err.Trace()
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}
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metadata, err := xl.getXLBucketMetadata()
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if err != nil {
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return err.Trace()
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}
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oldBucketMetadata := metadata.Buckets[bucketName]
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acl, ok := bucketMetadata["acl"]
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if !ok {
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return probe.NewError(InvalidArgument{})
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}
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oldBucketMetadata.ACL = BucketACL(acl)
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metadata.Buckets[bucketName] = oldBucketMetadata
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return xl.setXLBucketMetadata(metadata)
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}
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// listBuckets - return list of buckets
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func (xl API) listBuckets() (map[string]BucketMetadata, *probe.Error) {
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if err := xl.listXLBuckets(); err != nil {
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return nil, err.Trace()
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}
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metadata, err := xl.getXLBucketMetadata()
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if err != nil {
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// intentionally left out the error when XL is empty
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// but we need to revisit this area in future - since we need
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// to figure out between acceptable and unacceptable errors
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return make(map[string]BucketMetadata), nil
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}
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if metadata == nil {
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return make(map[string]BucketMetadata), nil
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}
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return metadata.Buckets, nil
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}
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// listObjects - return list of objects
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func (xl API) listObjects(bucket, prefix, marker, delimiter string, maxkeys int) (ListObjectsResults, *probe.Error) {
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if err := xl.listXLBuckets(); err != nil {
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return ListObjectsResults{}, err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return ListObjectsResults{}, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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listObjects, err := xl.buckets[bucket].ListObjects(prefix, marker, delimiter, maxkeys)
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if err != nil {
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return ListObjectsResults{}, err.Trace()
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}
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return listObjects, nil
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}
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// putObject - put object
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func (xl API) putObject(bucket, object, expectedMD5Sum string, reader io.Reader, size int64, metadata map[string]string, signature *signature4.Sign) (ObjectMetadata, *probe.Error) {
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if bucket == "" || strings.TrimSpace(bucket) == "" {
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return ObjectMetadata{}, probe.NewError(InvalidArgument{})
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}
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if object == "" || strings.TrimSpace(object) == "" {
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return ObjectMetadata{}, probe.NewError(InvalidArgument{})
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}
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if err := xl.listXLBuckets(); err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return ObjectMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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bucketMeta, err := xl.getXLBucketMetadata()
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if err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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if _, ok := bucketMeta.Buckets[bucket].BucketObjects[object]; ok {
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return ObjectMetadata{}, probe.NewError(ObjectExists{Object: object})
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}
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objMetadata, err := xl.buckets[bucket].WriteObject(object, reader, size, expectedMD5Sum, metadata, signature)
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if err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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bucketMeta.Buckets[bucket].BucketObjects[object] = struct{}{}
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if err := xl.setXLBucketMetadata(bucketMeta); err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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return objMetadata, nil
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}
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// putObject - put object
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func (xl API) putObjectPart(bucket, object, expectedMD5Sum, uploadID string, partID int, reader io.Reader, size int64, metadata map[string]string, signature *signature4.Sign) (PartMetadata, *probe.Error) {
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if bucket == "" || strings.TrimSpace(bucket) == "" {
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return PartMetadata{}, probe.NewError(InvalidArgument{})
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}
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if object == "" || strings.TrimSpace(object) == "" {
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return PartMetadata{}, probe.NewError(InvalidArgument{})
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}
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if err := xl.listXLBuckets(); err != nil {
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return PartMetadata{}, err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return PartMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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bucketMeta, err := xl.getXLBucketMetadata()
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if err != nil {
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return PartMetadata{}, err.Trace()
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}
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if _, ok := bucketMeta.Buckets[bucket].Multiparts[object]; !ok {
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return PartMetadata{}, probe.NewError(InvalidUploadID{UploadID: uploadID})
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}
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if _, ok := bucketMeta.Buckets[bucket].BucketObjects[object]; ok {
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return PartMetadata{}, probe.NewError(ObjectExists{Object: object})
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}
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objectPart := object + "/" + "multipart" + "/" + strconv.Itoa(partID)
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objmetadata, err := xl.buckets[bucket].WriteObject(objectPart, reader, size, expectedMD5Sum, metadata, signature)
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if err != nil {
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return PartMetadata{}, err.Trace()
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}
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partMetadata := PartMetadata{
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PartNumber: partID,
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LastModified: objmetadata.Created,
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ETag: objmetadata.MD5Sum,
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Size: objmetadata.Size,
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}
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multipartSession := bucketMeta.Buckets[bucket].Multiparts[object]
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multipartSession.Parts[strconv.Itoa(partID)] = partMetadata
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bucketMeta.Buckets[bucket].Multiparts[object] = multipartSession
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if err := xl.setXLBucketMetadata(bucketMeta); err != nil {
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return PartMetadata{}, err.Trace()
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}
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return partMetadata, nil
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}
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// getObject - get object
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func (xl API) getObject(bucket, object string) (reader io.ReadCloser, size int64, err *probe.Error) {
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if bucket == "" || strings.TrimSpace(bucket) == "" {
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return nil, 0, probe.NewError(InvalidArgument{})
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}
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if object == "" || strings.TrimSpace(object) == "" {
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return nil, 0, probe.NewError(InvalidArgument{})
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}
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if err := xl.listXLBuckets(); err != nil {
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return nil, 0, err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return nil, 0, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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return xl.buckets[bucket].ReadObject(object)
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}
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// getObjectMetadata - get object metadata
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func (xl API) getObjectMetadata(bucket, object string) (ObjectMetadata, *probe.Error) {
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if err := xl.listXLBuckets(); err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return ObjectMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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bucketMeta, err := xl.getXLBucketMetadata()
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if err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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if _, ok := bucketMeta.Buckets[bucket].BucketObjects[object]; !ok {
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return ObjectMetadata{}, probe.NewError(ObjectNotFound{Object: object})
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}
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objectMetadata, err := xl.buckets[bucket].GetObjectMetadata(object)
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if err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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return objectMetadata, nil
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}
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// newMultipartUpload - new multipart upload request
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func (xl API) newMultipartUpload(bucket, object, contentType string) (string, *probe.Error) {
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if err := xl.listXLBuckets(); err != nil {
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return "", err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return "", probe.NewError(BucketNotFound{Bucket: bucket})
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}
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allbuckets, err := xl.getXLBucketMetadata()
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if err != nil {
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return "", err.Trace()
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}
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bucketMetadata := allbuckets.Buckets[bucket]
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multiparts := make(map[string]MultiPartSession)
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if len(bucketMetadata.Multiparts) > 0 {
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multiparts = bucketMetadata.Multiparts
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}
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id := []byte(strconv.Itoa(rand.Int()) + bucket + object + time.Now().String())
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uploadIDSum := sha512.Sum512(id)
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uploadID := base64.URLEncoding.EncodeToString(uploadIDSum[:])[:47]
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multipartSession := MultiPartSession{
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UploadID: uploadID,
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Initiated: time.Now().UTC(),
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Parts: make(map[string]PartMetadata),
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TotalParts: 0,
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}
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multiparts[object] = multipartSession
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bucketMetadata.Multiparts = multiparts
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allbuckets.Buckets[bucket] = bucketMetadata
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if err := xl.setXLBucketMetadata(allbuckets); err != nil {
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return "", err.Trace()
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}
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return uploadID, nil
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}
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// listObjectParts list all object parts
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func (xl API) listObjectParts(bucket, object string, resources ObjectResourcesMetadata) (ObjectResourcesMetadata, *probe.Error) {
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if bucket == "" || strings.TrimSpace(bucket) == "" {
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return ObjectResourcesMetadata{}, probe.NewError(InvalidArgument{})
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}
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if object == "" || strings.TrimSpace(object) == "" {
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return ObjectResourcesMetadata{}, probe.NewError(InvalidArgument{})
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}
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if err := xl.listXLBuckets(); err != nil {
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return ObjectResourcesMetadata{}, err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return ObjectResourcesMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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allBuckets, err := xl.getXLBucketMetadata()
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if err != nil {
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return ObjectResourcesMetadata{}, err.Trace()
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}
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bucketMetadata := allBuckets.Buckets[bucket]
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if _, ok := bucketMetadata.Multiparts[object]; !ok {
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return ObjectResourcesMetadata{}, probe.NewError(InvalidUploadID{UploadID: resources.UploadID})
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}
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if bucketMetadata.Multiparts[object].UploadID != resources.UploadID {
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return ObjectResourcesMetadata{}, probe.NewError(InvalidUploadID{UploadID: resources.UploadID})
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}
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objectResourcesMetadata := resources
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objectResourcesMetadata.Bucket = bucket
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objectResourcesMetadata.Key = object
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var parts []*PartMetadata
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var startPartNumber int
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switch {
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case objectResourcesMetadata.PartNumberMarker == 0:
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startPartNumber = 1
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default:
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startPartNumber = objectResourcesMetadata.PartNumberMarker
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}
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for i := startPartNumber; i <= bucketMetadata.Multiparts[object].TotalParts; i++ {
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if len(parts) > objectResourcesMetadata.MaxParts {
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sort.Sort(partNumber(parts))
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objectResourcesMetadata.IsTruncated = true
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objectResourcesMetadata.Part = parts
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objectResourcesMetadata.NextPartNumberMarker = i
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return objectResourcesMetadata, nil
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}
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part, ok := bucketMetadata.Multiparts[object].Parts[strconv.Itoa(i)]
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if !ok {
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return ObjectResourcesMetadata{}, probe.NewError(InvalidPart{})
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}
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parts = append(parts, &part)
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}
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sort.Sort(partNumber(parts))
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objectResourcesMetadata.Part = parts
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return objectResourcesMetadata, nil
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}
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// completeMultipartUpload complete an incomplete multipart upload
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func (xl API) completeMultipartUpload(bucket, object, uploadID string, data io.Reader, signature *signature4.Sign) (ObjectMetadata, *probe.Error) {
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if bucket == "" || strings.TrimSpace(bucket) == "" {
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return ObjectMetadata{}, probe.NewError(InvalidArgument{})
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}
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if object == "" || strings.TrimSpace(object) == "" {
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return ObjectMetadata{}, probe.NewError(InvalidArgument{})
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}
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if err := xl.listXLBuckets(); err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return ObjectMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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allBuckets, err := xl.getXLBucketMetadata()
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if err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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bucketMetadata := allBuckets.Buckets[bucket]
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if _, ok := bucketMetadata.Multiparts[object]; !ok {
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return ObjectMetadata{}, probe.NewError(InvalidUploadID{UploadID: uploadID})
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}
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if bucketMetadata.Multiparts[object].UploadID != uploadID {
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return ObjectMetadata{}, probe.NewError(InvalidUploadID{UploadID: uploadID})
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}
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var partBytes []byte
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{
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var err error
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partBytes, err = ioutil.ReadAll(data)
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if err != nil {
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return ObjectMetadata{}, probe.NewError(err)
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}
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}
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if signature != nil {
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partHashBytes := sha256.Sum256(partBytes)
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ok, err := signature.DoesSignatureMatch(hex.EncodeToString(partHashBytes[:]))
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if err != nil {
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return ObjectMetadata{}, err.Trace()
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}
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if !ok {
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return ObjectMetadata{}, probe.NewError(SignDoesNotMatch{})
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}
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}
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parts := &CompleteMultipartUpload{}
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if err := xml.Unmarshal(partBytes, parts); err != nil {
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return ObjectMetadata{}, probe.NewError(MalformedXML{})
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}
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if !sort.IsSorted(completedParts(parts.Part)) {
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return ObjectMetadata{}, probe.NewError(InvalidPartOrder{})
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}
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for _, part := range parts.Part {
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if strings.Trim(part.ETag, "\"") != bucketMetadata.Multiparts[object].Parts[strconv.Itoa(part.PartNumber)].ETag {
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return ObjectMetadata{}, probe.NewError(InvalidPart{})
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}
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}
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var finalETagBytes []byte
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var finalSize int64
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totalParts := strconv.Itoa(bucketMetadata.Multiparts[object].TotalParts)
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for _, part := range bucketMetadata.Multiparts[object].Parts {
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partETagBytes, err := hex.DecodeString(part.ETag)
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if err != nil {
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return ObjectMetadata{}, probe.NewError(err)
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}
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finalETagBytes = append(finalETagBytes, partETagBytes...)
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finalSize += part.Size
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}
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finalETag := hex.EncodeToString(finalETagBytes)
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objMetadata := ObjectMetadata{}
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objMetadata.MD5Sum = finalETag + "-" + totalParts
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objMetadata.Object = object
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objMetadata.Bucket = bucket
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objMetadata.Size = finalSize
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objMetadata.Created = bucketMetadata.Multiparts[object].Parts[totalParts].LastModified
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return objMetadata, nil
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}
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// listMultipartUploads list all multipart uploads
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func (xl API) listMultipartUploads(bucket string, resources BucketMultipartResourcesMetadata) (BucketMultipartResourcesMetadata, *probe.Error) {
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if err := xl.listXLBuckets(); err != nil {
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return BucketMultipartResourcesMetadata{}, err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return BucketMultipartResourcesMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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allbuckets, err := xl.getXLBucketMetadata()
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if err != nil {
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return BucketMultipartResourcesMetadata{}, err.Trace()
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}
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bucketMetadata := allbuckets.Buckets[bucket]
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var uploads []*UploadMetadata
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for key, session := range bucketMetadata.Multiparts {
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if strings.HasPrefix(key, resources.Prefix) {
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if len(uploads) > resources.MaxUploads {
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sort.Sort(byKey(uploads))
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resources.Upload = uploads
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resources.NextKeyMarker = key
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resources.NextUploadIDMarker = session.UploadID
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resources.IsTruncated = true
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return resources, nil
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}
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// uploadIDMarker is ignored if KeyMarker is empty
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switch {
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case resources.KeyMarker != "" && resources.UploadIDMarker == "":
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if key > resources.KeyMarker {
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upload := new(UploadMetadata)
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upload.Key = key
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upload.UploadID = session.UploadID
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upload.Initiated = session.Initiated
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uploads = append(uploads, upload)
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}
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case resources.KeyMarker != "" && resources.UploadIDMarker != "":
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if session.UploadID > resources.UploadIDMarker {
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if key >= resources.KeyMarker {
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upload := new(UploadMetadata)
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upload.Key = key
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upload.UploadID = session.UploadID
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upload.Initiated = session.Initiated
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uploads = append(uploads, upload)
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}
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}
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default:
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upload := new(UploadMetadata)
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upload.Key = key
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upload.UploadID = session.UploadID
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upload.Initiated = session.Initiated
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uploads = append(uploads, upload)
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}
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}
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}
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sort.Sort(byKey(uploads))
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resources.Upload = uploads
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return resources, nil
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}
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// abortMultipartUpload - abort a incomplete multipart upload
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func (xl API) abortMultipartUpload(bucket, object, uploadID string) *probe.Error {
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if err := xl.listXLBuckets(); err != nil {
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return err.Trace()
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}
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if _, ok := xl.buckets[bucket]; !ok {
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return probe.NewError(BucketNotFound{Bucket: bucket})
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}
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allbuckets, err := xl.getXLBucketMetadata()
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if err != nil {
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return err.Trace()
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}
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bucketMetadata := allbuckets.Buckets[bucket]
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if _, ok := bucketMetadata.Multiparts[object]; !ok {
|
|
return probe.NewError(InvalidUploadID{UploadID: uploadID})
|
|
}
|
|
if bucketMetadata.Multiparts[object].UploadID != uploadID {
|
|
return probe.NewError(InvalidUploadID{UploadID: uploadID})
|
|
}
|
|
delete(bucketMetadata.Multiparts, object)
|
|
|
|
allbuckets.Buckets[bucket] = bucketMetadata
|
|
if err := xl.setXLBucketMetadata(allbuckets); err != nil {
|
|
return err.Trace()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
//// internal functions
|
|
|
|
// getBucketMetadataWriters -
|
|
func (xl API) getBucketMetadataWriters() ([]io.WriteCloser, *probe.Error) {
|
|
var writers []io.WriteCloser
|
|
for _, node := range xl.nodes {
|
|
disks, err := node.ListDisks()
|
|
if err != nil {
|
|
return nil, err.Trace()
|
|
}
|
|
writers = make([]io.WriteCloser, len(disks))
|
|
for order, disk := range disks {
|
|
bucketMetaDataWriter, err := disk.CreateFile(filepath.Join(xl.config.XLName, bucketMetadataConfig))
|
|
if err != nil {
|
|
return nil, err.Trace()
|
|
}
|
|
writers[order] = bucketMetaDataWriter
|
|
}
|
|
}
|
|
return writers, nil
|
|
}
|
|
|
|
// getBucketMetadataReaders - readers are returned in map rather than slice
|
|
func (xl API) getBucketMetadataReaders() (map[int]io.ReadCloser, *probe.Error) {
|
|
readers := make(map[int]io.ReadCloser)
|
|
disks := make(map[int]block.Block)
|
|
var err *probe.Error
|
|
for _, node := range xl.nodes {
|
|
nDisks := make(map[int]block.Block)
|
|
nDisks, err = node.ListDisks()
|
|
if err != nil {
|
|
return nil, err.Trace()
|
|
}
|
|
for k, v := range nDisks {
|
|
disks[k] = v
|
|
}
|
|
}
|
|
var bucketMetaDataReader io.ReadCloser
|
|
for order, disk := range disks {
|
|
bucketMetaDataReader, err = disk.Open(filepath.Join(xl.config.XLName, bucketMetadataConfig))
|
|
if err != nil {
|
|
continue
|
|
}
|
|
readers[order] = bucketMetaDataReader
|
|
}
|
|
if err != nil {
|
|
return nil, err.Trace()
|
|
}
|
|
return readers, nil
|
|
}
|
|
|
|
// setXLBucketMetadata -
|
|
func (xl API) setXLBucketMetadata(metadata *AllBuckets) *probe.Error {
|
|
writers, err := xl.getBucketMetadataWriters()
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
for _, writer := range writers {
|
|
jenc := json.NewEncoder(writer)
|
|
if err := jenc.Encode(metadata); err != nil {
|
|
CleanupWritersOnError(writers)
|
|
return probe.NewError(err)
|
|
}
|
|
}
|
|
for _, writer := range writers {
|
|
writer.Close()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// getXLBucketMetadata -
|
|
func (xl API) getXLBucketMetadata() (*AllBuckets, *probe.Error) {
|
|
metadata := &AllBuckets{}
|
|
readers, err := xl.getBucketMetadataReaders()
|
|
if err != nil {
|
|
return nil, err.Trace()
|
|
}
|
|
for _, reader := range readers {
|
|
defer reader.Close()
|
|
}
|
|
{
|
|
var err error
|
|
for _, reader := range readers {
|
|
jenc := json.NewDecoder(reader)
|
|
if err = jenc.Decode(metadata); err == nil {
|
|
return metadata, nil
|
|
}
|
|
}
|
|
return nil, probe.NewError(err)
|
|
}
|
|
}
|
|
|
|
// makeXLBucket -
|
|
func (xl API) makeXLBucket(bucketName, acl string) *probe.Error {
|
|
if err := xl.listXLBuckets(); err != nil {
|
|
return err.Trace()
|
|
}
|
|
if _, ok := xl.buckets[bucketName]; ok {
|
|
return probe.NewError(BucketExists{Bucket: bucketName})
|
|
}
|
|
bkt, bucketMetadata, err := newBucket(bucketName, acl, xl.config.XLName, xl.nodes)
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
nodeNumber := 0
|
|
xl.buckets[bucketName] = bkt
|
|
for _, node := range xl.nodes {
|
|
disks := make(map[int]block.Block)
|
|
disks, err = node.ListDisks()
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
for order, disk := range disks {
|
|
bucketSlice := fmt.Sprintf("%s$%d$%d", bucketName, nodeNumber, order)
|
|
err := disk.MakeDir(filepath.Join(xl.config.XLName, bucketSlice))
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
}
|
|
nodeNumber = nodeNumber + 1
|
|
}
|
|
var metadata *AllBuckets
|
|
metadata, err = xl.getXLBucketMetadata()
|
|
if err != nil {
|
|
if os.IsNotExist(err.ToGoError()) {
|
|
metadata = new(AllBuckets)
|
|
metadata.Buckets = make(map[string]BucketMetadata)
|
|
metadata.Buckets[bucketName] = bucketMetadata
|
|
err = xl.setXLBucketMetadata(metadata)
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
return nil
|
|
}
|
|
return err.Trace()
|
|
}
|
|
metadata.Buckets[bucketName] = bucketMetadata
|
|
err = xl.setXLBucketMetadata(metadata)
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// listXLBuckets -
|
|
func (xl API) listXLBuckets() *probe.Error {
|
|
var disks map[int]block.Block
|
|
var err *probe.Error
|
|
for _, node := range xl.nodes {
|
|
disks, err = node.ListDisks()
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
}
|
|
var dirs []os.FileInfo
|
|
for _, disk := range disks {
|
|
dirs, err = disk.ListDir(xl.config.XLName)
|
|
if err == nil {
|
|
break
|
|
}
|
|
}
|
|
// if all disks are missing then return error
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
for _, dir := range dirs {
|
|
splitDir := strings.Split(dir.Name(), "$")
|
|
if len(splitDir) < 3 {
|
|
return probe.NewError(CorruptedBackend{Backend: dir.Name()})
|
|
}
|
|
bucketName := splitDir[0]
|
|
// we dont need this once we cache from makeXLBucket()
|
|
bkt, _, err := newBucket(bucketName, "private", xl.config.XLName, xl.nodes)
|
|
if err != nil {
|
|
return err.Trace()
|
|
}
|
|
xl.buckets[bucketName] = bkt
|
|
}
|
|
return nil
|
|
}
|