113 lines
3.6 KiB
Go
113 lines
3.6 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 (
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"encoding/json"
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"path"
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"time"
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)
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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) writeUploadJSON(bucket, object, uploadID string, initiated time.Time) (err 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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var uploadsJSON uploadsV1
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uploadsJSON, err = readUploadsJSON(bucket, object, fs.storage)
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if err != nil {
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// uploads.json might not exist hence ignore errFileNotFound.
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if errorCause(err) != errFileNotFound {
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return err
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}
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// Set uploads format to `fs`.
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uploadsJSON = newUploadsV1("fs")
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}
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// Add a new upload id.
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uploadsJSON.AddUploadID(uploadID, initiated)
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// Update `uploads.json` on all disks.
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uploadsJSONBytes, wErr := json.Marshal(&uploadsJSON)
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if wErr != nil {
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return traceError(wErr)
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}
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// Write `uploads.json` to disk.
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if wErr = fs.storage.AppendFile(minioMetaBucket, tmpUploadsPath, uploadsJSONBytes); wErr != nil {
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return traceError(wErr)
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}
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wErr = fs.storage.RenameFile(minioMetaBucket, tmpUploadsPath, minioMetaBucket, uploadsPath)
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if wErr != nil {
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if dErr := fs.storage.DeleteFile(minioMetaBucket, tmpUploadsPath); dErr != nil {
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return traceError(dErr)
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}
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return traceError(wErr)
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}
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return nil
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}
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// updateUploadsJSON - update `uploads.json` with new uploadsJSON for all disks.
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func (fs fsObjects) updateUploadsJSON(bucket, object string, uploadsJSON uploadsV1) (err 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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uploadsBytes, wErr := json.Marshal(uploadsJSON)
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if wErr != nil {
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return traceError(wErr)
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}
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if wErr = fs.storage.AppendFile(minioMetaBucket, tmpUploadsPath, uploadsBytes); wErr != nil {
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return traceError(wErr)
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}
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if wErr = fs.storage.RenameFile(minioMetaBucket, tmpUploadsPath, minioMetaBucket, uploadsPath); wErr != nil {
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return traceError(wErr)
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}
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return nil
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}
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