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dd6ecf1193
- Reads and writes of uploads.json in XL now uses quorum for newMultipart, completeMultipart and abortMultipart operations. - Each disk's `uploads.json` file is read and updated independently for adding or removing an upload id from the file. Quorum is used to decide if the high-level operation actually succeeded. - Refactor FS code to simplify the flow, and fix a bug while reading uploads.json.
91 lines
2.7 KiB
Go
91 lines
2.7 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 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 cmd
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import "path"
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// Returns if the prefix is a multipart upload.
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func (fs fsObjects) isMultipartUpload(bucket, prefix string) bool {
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_, err := fs.storage.StatFile(bucket, pathJoin(prefix, uploadsJSONFile))
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return err == nil
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}
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// Checks whether bucket exists.
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func (fs fsObjects) isBucketExist(bucket string) bool {
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// Check whether bucket exists.
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_, err := fs.storage.StatVol(bucket)
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if err != nil {
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if err == errVolumeNotFound {
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return false
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}
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errorIf(err, "Stat failed on bucket "+bucket+".")
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return false
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}
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return true
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}
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// isUploadIDExists - verify if a given uploadID exists and is valid.
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func (fs fsObjects) isUploadIDExists(bucket, object, uploadID string) bool {
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uploadIDPath := path.Join(mpartMetaPrefix, bucket, object, uploadID)
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_, err := fs.storage.StatFile(minioMetaBucket, path.Join(uploadIDPath, fsMetaJSONFile))
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if err != nil {
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if err == errFileNotFound {
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return false
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}
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errorIf(err, "Unable to access upload id"+uploadIDPath)
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return false
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}
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return true
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}
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// writeUploadJSON - create `uploads.json` or update it with new uploadID.
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func (fs fsObjects) updateUploadJSON(bucket, object string, uCh uploadIDChange) error {
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uploadsPath := path.Join(mpartMetaPrefix, bucket, object, uploadsJSONFile)
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uniqueID := getUUID()
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tmpUploadsPath := path.Join(tmpMetaPrefix, uniqueID)
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uploadsJSON, err := readUploadsJSON(bucket, object, fs.storage)
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if errorCause(err) == errFileNotFound {
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// If file is not found, we assume a default (empty)
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// upload info.
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uploadsJSON, err = newUploadsV1("fs"), nil
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}
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if err != nil {
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return err
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}
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// update the uploadsJSON struct
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if !uCh.isRemove {
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// Add the uploadID
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uploadsJSON.AddUploadID(uCh.uploadID, uCh.initiated)
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} else {
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// Remove the upload ID
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uploadsJSON.RemoveUploadID(uCh.uploadID)
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}
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// update the file or delete it?
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if len(uploadsJSON.Uploads) > 0 {
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err = writeUploadJSON(&uploadsJSON, uploadsPath, tmpUploadsPath, fs.storage)
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} else {
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// no uploads, so we delete the file.
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if err = fs.storage.DeleteFile(minioMetaBucket, uploadsPath); err != nil {
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return toObjectErr(traceError(err), minioMetaBucket, uploadsPath)
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}
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}
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return err
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}
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