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614 lines
21 KiB
614 lines
21 KiB
/*
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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 main
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import (
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"crypto/md5"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"path"
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"sort"
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"strconv"
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"strings"
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"github.com/skyrings/skyring-common/tools/uuid"
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)
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const (
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incompleteFile = "00000.incomplete"
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uploadsJSONFile = "uploads.json"
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)
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// createUploadsJSON - create uploads.json placeholder file.
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func createUploadsJSON(storage StorageAPI, bucket, object, uploadID string) error {
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// Place holder uploads.json
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uploadsPath := path.Join(mpartMetaPrefix, bucket, object, uploadsJSONFile)
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uploadsJSONSuffix := fmt.Sprintf("%s.%s", uploadID, uploadsJSONFile)
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tmpUploadsPath := path.Join(tmpMetaPrefix, bucket, object, uploadsJSONSuffix)
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w, err := storage.CreateFile(minioMetaBucket, uploadsPath)
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if err != nil {
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return err
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}
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if err = w.Close(); err != nil {
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if clErr := safeCloseAndRemove(w); clErr != nil {
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return clErr
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}
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return err
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}
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_, err = storage.StatFile(minioMetaBucket, uploadsPath)
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if err != nil {
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if err == errFileNotFound {
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err = storage.RenameFile(minioMetaBucket, tmpUploadsPath, minioMetaBucket, uploadsPath)
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if err == nil {
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return nil
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}
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}
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if derr := storage.DeleteFile(minioMetaBucket, tmpUploadsPath); derr != nil {
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return derr
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}
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return err
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}
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return nil
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}
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/// Common multipart object layer functions.
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// newMultipartUploadCommon - initialize a new multipart, is a common
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// function for both object layers.
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func newMultipartUploadCommon(storage StorageAPI, bucket string, object string, meta map[string]string) (uploadID string, err error) {
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// Verify if bucket name is valid.
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if !IsValidBucketName(bucket) {
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return "", BucketNameInvalid{Bucket: bucket}
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}
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// Verify whether the bucket exists.
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if !isBucketExist(storage, bucket) {
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return "", BucketNotFound{Bucket: bucket}
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}
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// Verify if object name is valid.
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if !IsValidObjectName(object) {
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return "", ObjectNameInvalid{Bucket: bucket, Object: object}
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}
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// This lock needs to be held for any changes to the directory contents of ".minio/multipart/object/"
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nsMutex.Lock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object))
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defer nsMutex.Unlock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object))
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// Loops through until successfully generates a new unique upload id.
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for {
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uuid, err := uuid.New()
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if err != nil {
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return "", err
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}
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uploadID := uuid.String()
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// Create placeholder file 'uploads.json'
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err = createUploadsJSON(storage, bucket, object, uploadID)
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if err != nil {
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return "", err
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}
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uploadIDPath := path.Join(mpartMetaPrefix, bucket, object, uploadID, incompleteFile)
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incompleteSuffix := fmt.Sprintf("%s.%s", uploadID, incompleteFile)
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tempUploadIDPath := path.Join(tmpMetaPrefix, bucket, object, incompleteSuffix)
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if _, err = storage.StatFile(minioMetaBucket, uploadIDPath); err != nil {
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if err != errFileNotFound {
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return "", toObjectErr(err, minioMetaBucket, uploadIDPath)
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}
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// uploadIDPath doesn't exist, so create empty file to reserve the name
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var w io.WriteCloser
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if w, err = storage.CreateFile(minioMetaBucket, tempUploadIDPath); err != nil {
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return "", toObjectErr(err, minioMetaBucket, tempUploadIDPath)
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}
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// Encode the uploaded metadata into incomplete file.
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encoder := json.NewEncoder(w)
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err = encoder.Encode(&meta)
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if err != nil {
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if clErr := safeCloseAndRemove(w); clErr != nil {
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return "", toObjectErr(clErr, minioMetaBucket, tempUploadIDPath)
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}
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return "", toObjectErr(err, minioMetaBucket, tempUploadIDPath)
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}
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// Close the writer.
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if err = w.Close(); err != nil {
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if clErr := safeCloseAndRemove(w); clErr != nil {
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return "", toObjectErr(clErr, minioMetaBucket, tempUploadIDPath)
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}
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return "", toObjectErr(err, minioMetaBucket, tempUploadIDPath)
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}
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// Rename the file to the actual location from temporary path.
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err = storage.RenameFile(minioMetaBucket, tempUploadIDPath, minioMetaBucket, uploadIDPath)
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if err != nil {
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if derr := storage.DeleteFile(minioMetaBucket, tempUploadIDPath); derr != nil {
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return "", toObjectErr(derr, minioMetaBucket, tempUploadIDPath)
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}
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return "", toObjectErr(err, minioMetaBucket, uploadIDPath)
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}
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return uploadID, nil
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}
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// uploadIDPath already exists.
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// loop again to try with different uuid generated.
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}
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}
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// putObjectPartCommon - put object part.
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func putObjectPartCommon(storage StorageAPI, bucket string, object string, uploadID string, partID int, size int64, data io.Reader, md5Hex string) (string, error) {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return "", BucketNameInvalid{Bucket: bucket}
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}
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// Verify whether the bucket exists.
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if !isBucketExist(storage, bucket) {
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return "", BucketNotFound{Bucket: bucket}
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}
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if !IsValidObjectName(object) {
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return "", ObjectNameInvalid{Bucket: bucket, Object: object}
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}
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if !isUploadIDExists(storage, bucket, object, uploadID) {
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return "", InvalidUploadID{UploadID: uploadID}
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}
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// Hold read lock on the uploadID so that no one aborts it.
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nsMutex.RLock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID))
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defer nsMutex.RUnlock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID))
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// Hold write lock on the part so that there is no parallel upload on the part.
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nsMutex.Lock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID, strconv.Itoa(partID)))
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defer nsMutex.Unlock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID, strconv.Itoa(partID)))
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partSuffix := fmt.Sprintf("%s.%.5d", uploadID, partID)
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partSuffixPath := path.Join(tmpMetaPrefix, bucket, object, partSuffix)
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fileWriter, err := storage.CreateFile(minioMetaBucket, partSuffixPath)
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if err != nil {
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return "", toObjectErr(err, bucket, object)
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}
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// Initialize md5 writer.
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md5Writer := md5.New()
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// Instantiate a new multi writer.
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multiWriter := io.MultiWriter(md5Writer, fileWriter)
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// Instantiate checksum hashers and create a multiwriter.
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if size > 0 {
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if _, err = io.CopyN(multiWriter, data, size); err != nil {
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if clErr := safeCloseAndRemove(fileWriter); clErr != nil {
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return "", toObjectErr(clErr, bucket, object)
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}
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return "", toObjectErr(err, bucket, object)
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}
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// Reader shouldn't have more data what mentioned in size argument.
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// reading one more byte from the reader to validate it.
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// expected to fail, success validates existence of more data in the reader.
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if _, err = io.CopyN(ioutil.Discard, data, 1); err == nil {
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if clErr := safeCloseAndRemove(fileWriter); clErr != nil {
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return "", toObjectErr(clErr, bucket, object)
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}
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return "", UnExpectedDataSize{Size: int(size)}
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}
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} else {
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if _, err = io.Copy(multiWriter, data); err != nil {
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if clErr := safeCloseAndRemove(fileWriter); clErr != nil {
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return "", toObjectErr(clErr, bucket, object)
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}
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return "", toObjectErr(err, bucket, object)
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}
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}
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newMD5Hex := hex.EncodeToString(md5Writer.Sum(nil))
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if md5Hex != "" {
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if newMD5Hex != md5Hex {
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if clErr := safeCloseAndRemove(fileWriter); clErr != nil {
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return "", toObjectErr(clErr, bucket, object)
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}
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return "", BadDigest{md5Hex, newMD5Hex}
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}
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}
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err = fileWriter.Close()
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if err != nil {
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if clErr := safeCloseAndRemove(fileWriter); clErr != nil {
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return "", toObjectErr(clErr, bucket, object)
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}
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return "", err
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}
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partSuffixMD5 := fmt.Sprintf("%.5d.%s", partID, newMD5Hex)
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partSuffixMD5Path := path.Join(mpartMetaPrefix, bucket, object, uploadID, partSuffixMD5)
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if _, err = storage.StatFile(minioMetaBucket, partSuffixMD5Path); err == nil {
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// Part already uploaded as md5sum matches with the previous part.
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// Just delete the temporary file.
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if err = storage.DeleteFile(minioMetaBucket, partSuffixPath); err != nil {
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return "", toObjectErr(err, minioMetaBucket, partSuffixPath)
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}
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return newMD5Hex, nil
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}
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err = storage.RenameFile(minioMetaBucket, partSuffixPath, minioMetaBucket, partSuffixMD5Path)
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if err != nil {
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if derr := storage.DeleteFile(minioMetaBucket, partSuffixPath); derr != nil {
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return "", toObjectErr(derr, minioMetaBucket, partSuffixPath)
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}
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return "", toObjectErr(err, minioMetaBucket, partSuffixMD5Path)
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}
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return newMD5Hex, nil
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}
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// Wrapper to which removes all the uploaded parts after a successful
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// complete multipart upload.
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func cleanupUploadedParts(storage StorageAPI, bucket, object, uploadID string) error {
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return cleanupDir(storage, minioMetaBucket, path.Join(mpartMetaPrefix, bucket, object, uploadID))
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}
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// abortMultipartUploadCommon - aborts a multipart upload, common
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// function used by both object layers.
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func abortMultipartUploadCommon(storage StorageAPI, bucket, object, uploadID string) error {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return BucketNameInvalid{Bucket: bucket}
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}
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if !isBucketExist(storage, bucket) {
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return BucketNotFound{Bucket: bucket}
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}
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if !IsValidObjectName(object) {
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return ObjectNameInvalid{Bucket: bucket, Object: object}
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}
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if !isUploadIDExists(storage, bucket, object, uploadID) {
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return InvalidUploadID{UploadID: uploadID}
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}
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// Hold lock so that there is no competing complete-multipart-upload or put-object-part.
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nsMutex.Lock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID))
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defer nsMutex.Unlock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID))
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if err := cleanupUploadedParts(storage, bucket, object, uploadID); err != nil {
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return err
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}
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// Validate if there are other incomplete upload-id's present for
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// the object, if yes do not attempt to delete 'uploads.json'.
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if entries, err := storage.ListDir(minioMetaBucket, path.Join(mpartMetaPrefix, bucket, object)); err == nil {
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if len(entries) > 1 {
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return nil
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}
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}
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uploadsJSONPath := path.Join(mpartMetaPrefix, bucket, object, uploadsJSONFile)
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if err := storage.DeleteFile(minioMetaBucket, uploadsJSONPath); err != nil {
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return err
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}
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return nil
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}
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// isIncompleteMultipart - is object incomplete multipart.
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func isIncompleteMultipart(storage StorageAPI, objectPath string) (bool, error) {
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_, err := storage.StatFile(minioMetaBucket, path.Join(objectPath, uploadsJSONFile))
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if err != nil {
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if err == errFileNotFound {
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return false, nil
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}
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return false, err
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}
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return true, nil
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}
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// listLeafEntries - lists all entries if a given prefixPath is a leaf
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// directory, returns error if any - returns empty list if prefixPath
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// is not a leaf directory.
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func listLeafEntries(storage StorageAPI, prefixPath string) (entries []string, err error) {
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var ok bool
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if ok, err = isIncompleteMultipart(storage, prefixPath); err != nil {
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return nil, err
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} else if !ok {
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return nil, nil
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}
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entries, err = storage.ListDir(minioMetaBucket, prefixPath)
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if err != nil {
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return nil, err
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}
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var newEntries []string
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for _, entry := range entries {
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if strings.HasSuffix(entry, slashSeparator) {
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newEntries = append(newEntries, entry)
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}
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}
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return newEntries, nil
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}
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// listMetaBucketMultipartFiles - list all files at a given prefix inside minioMetaBucket.
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func listMetaBucketMultipartFiles(layer ObjectLayer, prefixPath string, markerPath string, recursive bool, maxKeys int) (fileInfos []FileInfo, eof bool, err error) {
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var storage StorageAPI
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switch l := layer.(type) {
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case fsObjects:
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storage = l.storage
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case xlObjects:
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storage = l.storage
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}
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walker := lookupTreeWalk(layer, listParams{minioMetaBucket, recursive, markerPath, prefixPath})
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if walker == nil {
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walker = startTreeWalk(layer, minioMetaBucket, prefixPath, markerPath, recursive)
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}
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// newMaxKeys tracks the size of entries which are going to be
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// returned back.
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var newMaxKeys int
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// Following loop gathers and filters out special files inside
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// minio meta volume.
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for {
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walkResult, ok := <-walker.ch
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if !ok {
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// Closed channel.
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eof = true
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break
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}
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// For any walk error return right away.
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if walkResult.err != nil {
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// File not found or Disk not found is a valid case.
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if walkResult.err == errFileNotFound || walkResult.err == errDiskNotFound {
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return nil, true, nil
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}
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return nil, false, toObjectErr(walkResult.err, minioMetaBucket, prefixPath)
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}
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fi := walkResult.fileInfo
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var entries []string
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if fi.Mode.IsDir() {
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// List all the entries if fi.Name is a leaf directory, if
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// fi.Name is not a leaf directory then the resulting
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// entries are empty.
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entries, err = listLeafEntries(storage, fi.Name)
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if err != nil {
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return nil, false, err
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}
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}
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if len(entries) > 0 {
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// We reach here for non-recursive case and a leaf entry.
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sort.Strings(entries)
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for _, entry := range entries {
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var fileInfo FileInfo
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incompleteUploadFile := path.Join(fi.Name, entry, incompleteFile)
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fileInfo, err = storage.StatFile(minioMetaBucket, incompleteUploadFile)
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if err != nil {
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return nil, false, err
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}
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fileInfo.Name = path.Join(fi.Name, entry)
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fileInfos = append(fileInfos, fileInfo)
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newMaxKeys++
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// If we have reached the maxKeys, it means we have listed
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// everything that was requested. Return right here.
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if newMaxKeys == maxKeys {
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return
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}
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}
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} else {
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// We reach here for a non-recursive case non-leaf entry
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// OR recursive case with fi.Name.
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if !fi.Mode.IsDir() { // Do not skip non-recursive case directory entries.
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// Validate if 'fi.Name' is incomplete multipart.
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if !strings.HasSuffix(fi.Name, incompleteFile) {
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continue
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}
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fi.Name = path.Dir(fi.Name)
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}
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fileInfos = append(fileInfos, fi)
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newMaxKeys++
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// If we have reached the maxKeys, it means we have listed
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// everything that was requested. Return right here.
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if newMaxKeys == maxKeys {
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return
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}
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}
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}
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// Return entries here.
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return fileInfos, eof, nil
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}
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// FIXME: Currently the code sorts based on keyName/upload-id which is
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// in correct based on the S3 specs. According to s3 specs we are
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// supposed to only lexically sort keyNames and then for keyNames with
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// multiple upload ids should be sorted based on the initiated time.
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// Currently this case is not handled.
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// listMultipartUploadsCommon - lists all multipart uploads, common
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// function for both object layers.
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func listMultipartUploadsCommon(layer ObjectLayer, bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (ListMultipartsInfo, error) {
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var storage StorageAPI
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switch l := layer.(type) {
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case xlObjects:
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storage = l.storage
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case fsObjects:
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storage = l.storage
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}
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result := ListMultipartsInfo{}
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return ListMultipartsInfo{}, BucketNameInvalid{Bucket: bucket}
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}
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if !isBucketExist(storage, bucket) {
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return ListMultipartsInfo{}, BucketNotFound{Bucket: bucket}
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}
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if !IsValidObjectPrefix(prefix) {
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return ListMultipartsInfo{}, ObjectNameInvalid{Bucket: bucket, Object: prefix}
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}
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// Verify if delimiter is anything other than '/', which we do not support.
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if delimiter != "" && delimiter != slashSeparator {
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return ListMultipartsInfo{}, UnsupportedDelimiter{
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Delimiter: delimiter,
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}
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}
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// Verify if marker has prefix.
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if keyMarker != "" && !strings.HasPrefix(keyMarker, prefix) {
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return ListMultipartsInfo{}, InvalidMarkerPrefixCombination{
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Marker: keyMarker,
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Prefix: prefix,
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}
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}
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if uploadIDMarker != "" {
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if strings.HasSuffix(keyMarker, slashSeparator) {
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return result, InvalidUploadIDKeyCombination{
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UploadIDMarker: uploadIDMarker,
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KeyMarker: keyMarker,
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}
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}
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id, err := uuid.Parse(uploadIDMarker)
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if err != nil {
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return result, err
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}
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if id.IsZero() {
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return result, MalformedUploadID{
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UploadID: uploadIDMarker,
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}
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}
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}
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recursive := true
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if delimiter == slashSeparator {
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recursive = false
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}
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result.IsTruncated = true
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result.MaxUploads = maxUploads
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// Not using path.Join() as it strips off the trailing '/'.
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multipartPrefixPath := pathJoin(mpartMetaPrefix, pathJoin(bucket, prefix))
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if prefix == "" {
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// Should have a trailing "/" if prefix is ""
|
|
// For ex. multipartPrefixPath should be "multipart/bucket/" if prefix is ""
|
|
multipartPrefixPath += slashSeparator
|
|
}
|
|
multipartMarkerPath := ""
|
|
if keyMarker != "" {
|
|
keyMarkerPath := pathJoin(pathJoin(bucket, keyMarker), uploadIDMarker)
|
|
multipartMarkerPath = pathJoin(mpartMetaPrefix, keyMarkerPath)
|
|
}
|
|
|
|
// List all the multipart files at prefixPath, starting with marker keyMarkerPath.
|
|
fileInfos, eof, err := listMetaBucketMultipartFiles(layer, multipartPrefixPath, multipartMarkerPath, recursive, maxUploads)
|
|
if err != nil {
|
|
return ListMultipartsInfo{}, err
|
|
}
|
|
|
|
// Loop through all the received files fill in the multiparts result.
|
|
for _, fi := range fileInfos {
|
|
var objectName string
|
|
var uploadID string
|
|
if fi.Mode.IsDir() {
|
|
// All directory entries are common prefixes.
|
|
uploadID = "" // Upload ids are empty for CommonPrefixes.
|
|
objectName = strings.TrimPrefix(fi.Name, retainSlash(pathJoin(mpartMetaPrefix, bucket)))
|
|
result.CommonPrefixes = append(result.CommonPrefixes, objectName)
|
|
} else {
|
|
uploadID = path.Base(fi.Name)
|
|
objectName = strings.TrimPrefix(path.Dir(fi.Name), retainSlash(pathJoin(mpartMetaPrefix, bucket)))
|
|
result.Uploads = append(result.Uploads, uploadMetadata{
|
|
Object: objectName,
|
|
UploadID: uploadID,
|
|
Initiated: fi.ModTime,
|
|
})
|
|
}
|
|
result.NextKeyMarker = objectName
|
|
result.NextUploadIDMarker = uploadID
|
|
}
|
|
result.IsTruncated = !eof
|
|
if !result.IsTruncated {
|
|
result.NextKeyMarker = ""
|
|
result.NextUploadIDMarker = ""
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
// ListObjectParts - list object parts, common function across both object layers.
|
|
func listObjectPartsCommon(storage StorageAPI, bucket, object, uploadID string, partNumberMarker, maxParts int) (ListPartsInfo, error) {
|
|
// Verify if bucket is valid.
|
|
if !IsValidBucketName(bucket) {
|
|
return ListPartsInfo{}, BucketNameInvalid{Bucket: bucket}
|
|
}
|
|
// Verify whether the bucket exists.
|
|
if !isBucketExist(storage, bucket) {
|
|
return ListPartsInfo{}, BucketNotFound{Bucket: bucket}
|
|
}
|
|
if !IsValidObjectName(object) {
|
|
return ListPartsInfo{}, ObjectNameInvalid{Bucket: bucket, Object: object}
|
|
}
|
|
if !isUploadIDExists(storage, bucket, object, uploadID) {
|
|
return ListPartsInfo{}, InvalidUploadID{UploadID: uploadID}
|
|
}
|
|
// Hold lock so that there is no competing abort-multipart-upload or complete-multipart-upload.
|
|
nsMutex.Lock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID))
|
|
defer nsMutex.Unlock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID))
|
|
result := ListPartsInfo{}
|
|
entries, err := storage.ListDir(minioMetaBucket, path.Join(mpartMetaPrefix, bucket, object, uploadID))
|
|
if err != nil {
|
|
return result, err
|
|
}
|
|
sort.Strings(entries)
|
|
var newEntries []string
|
|
for _, entry := range entries {
|
|
newEntries = append(newEntries, path.Base(entry))
|
|
}
|
|
idx := sort.SearchStrings(newEntries, fmt.Sprintf("%.5d.", partNumberMarker+1))
|
|
newEntries = newEntries[idx:]
|
|
count := maxParts
|
|
for _, entry := range newEntries {
|
|
fi, err := storage.StatFile(minioMetaBucket, path.Join(mpartMetaPrefix, bucket, object, uploadID, entry))
|
|
splitEntry := strings.SplitN(entry, ".", 2)
|
|
partStr := splitEntry[0]
|
|
etagStr := splitEntry[1]
|
|
partNum, err := strconv.Atoi(partStr)
|
|
if err != nil {
|
|
return ListPartsInfo{}, err
|
|
}
|
|
result.Parts = append(result.Parts, partInfo{
|
|
PartNumber: partNum,
|
|
LastModified: fi.ModTime,
|
|
ETag: etagStr,
|
|
Size: fi.Size,
|
|
})
|
|
count--
|
|
if count == 0 {
|
|
break
|
|
}
|
|
}
|
|
// If listed entries are more than maxParts, we set IsTruncated as true.
|
|
if len(newEntries) > len(result.Parts) {
|
|
result.IsTruncated = true
|
|
// Make sure to fill next part number marker if IsTruncated is
|
|
// true for subsequent listing.
|
|
nextPartNumberMarker := result.Parts[len(result.Parts)-1].PartNumber
|
|
result.NextPartNumberMarker = nextPartNumberMarker
|
|
}
|
|
result.Bucket = bucket
|
|
result.Object = object
|
|
result.UploadID = uploadID
|
|
result.MaxParts = maxParts
|
|
return result, nil
|
|
}
|
|
|
|
// isUploadIDExists - verify if a given uploadID exists and is valid.
|
|
func isUploadIDExists(storage StorageAPI, bucket, object, uploadID string) bool {
|
|
uploadIDPath := path.Join(mpartMetaPrefix, bucket, object, uploadID, incompleteFile)
|
|
st, err := storage.StatFile(minioMetaBucket, uploadIDPath)
|
|
if err != nil {
|
|
if err == errFileNotFound {
|
|
return false
|
|
}
|
|
errorIf(err, "Stat failed on "+minioMetaBucket+"/"+uploadIDPath+".")
|
|
return false
|
|
}
|
|
return st.Mode.IsRegular()
|
|
}
|
|
|