2016-04-11 10:29:18 +02:00
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/*
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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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2016-05-01 10:25:48 +02:00
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"encoding/json"
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2016-04-11 10:29:18 +02:00
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"fmt"
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"io"
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"path"
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2016-05-06 19:19:09 +02:00
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"strings"
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2016-05-08 11:38:35 +02:00
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"sync"
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2016-05-05 00:28:58 +02:00
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"time"
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2016-04-11 10:29:18 +02:00
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)
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2016-05-02 02:52:16 +02:00
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// MultipartPartInfo Info of each part kept in the multipart metadata file after
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// CompleteMultipartUpload() is called.
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type MultipartPartInfo struct {
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PartNumber int
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ETag string
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Size int64
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}
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// MultipartObjectInfo - contents of the multipart metadata file after
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// CompleteMultipartUpload() is called.
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type MultipartObjectInfo struct {
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Parts []MultipartPartInfo
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ModTime time.Time
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Size int64
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MD5Sum string
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ContentType string
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ContentEncoding string
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// Add more fields here.
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}
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2016-05-06 19:19:09 +02:00
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type byMultipartFiles []string
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func (files byMultipartFiles) Len() int { return len(files) }
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func (files byMultipartFiles) Less(i, j int) bool {
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first := strings.TrimSuffix(files[i], multipartSuffix)
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second := strings.TrimSuffix(files[j], multipartSuffix)
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return first < second
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}
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func (files byMultipartFiles) Swap(i, j int) { files[i], files[j] = files[j], files[i] }
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2016-05-02 02:52:16 +02:00
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// GetPartNumberOffset - given an offset for the whole object, return the part and offset in that part.
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func (m MultipartObjectInfo) GetPartNumberOffset(offset int64) (partIndex int, partOffset int64, err error) {
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partOffset = offset
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for i, part := range m.Parts {
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partIndex = i
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if partOffset < part.Size {
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return
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}
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partOffset -= part.Size
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}
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// Offset beyond the size of the object
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err = errUnexpected
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return
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}
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2016-05-19 05:16:19 +02:00
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// getMultipartObjectMeta - incomplete meta file and extract meta information if any.
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func getMultipartObjectMeta(storage StorageAPI, metaFile string) (meta map[string]string, err error) {
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meta = make(map[string]string)
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offset := int64(0)
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objMetaReader, err := storage.ReadFile(minioMetaBucket, metaFile, offset)
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if err != nil {
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return nil, err
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}
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// Close the metadata reader.
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defer objMetaReader.Close()
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2016-05-19 04:54:25 +02:00
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decoder := json.NewDecoder(objMetaReader)
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err = decoder.Decode(&meta)
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if err != nil {
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return nil, err
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}
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return meta, nil
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}
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2016-05-02 02:52:16 +02:00
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func partNumToPartFileName(partNum int) string {
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return fmt.Sprintf("%.5d%s", partNum, multipartSuffix)
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}
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2016-04-11 10:29:18 +02:00
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// ListMultipartUploads - list multipart uploads.
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func (xl xlObjects) ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (ListMultipartsInfo, error) {
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2016-05-05 21:51:56 +02:00
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return listMultipartUploadsCommon(xl, bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploads)
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2016-04-11 10:29:18 +02:00
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}
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2016-05-03 01:57:31 +02:00
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// NewMultipartUpload - initialize a new multipart upload, returns a unique id.
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2016-05-19 04:54:25 +02:00
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func (xl xlObjects) NewMultipartUpload(bucket, object string, meta map[string]string) (string, error) {
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return newMultipartUploadCommon(xl.storage, bucket, object, meta)
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2016-04-11 10:29:18 +02:00
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}
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2016-04-25 19:39:28 +02:00
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// PutObjectPart - writes the multipart upload chunks.
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func (xl xlObjects) PutObjectPart(bucket, object, uploadID string, partID int, size int64, data io.Reader, md5Hex string) (string, error) {
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return putObjectPartCommon(xl.storage, bucket, object, uploadID, partID, size, data, md5Hex)
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}
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2016-05-04 01:10:24 +02:00
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// ListObjectParts - list object parts.
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func (xl xlObjects) ListObjectParts(bucket, object, uploadID string, partNumberMarker, maxParts int) (ListPartsInfo, error) {
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return listObjectPartsCommon(xl.storage, bucket, object, uploadID, partNumberMarker, maxParts)
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2016-04-11 10:29:18 +02:00
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}
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2016-05-13 20:52:36 +02:00
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// This function does the following check, suppose
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// object is "a/b/c/d", stat makes sure that objects ""a/b/c""
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// "a/b" and "a" do not exist.
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func (xl xlObjects) parentDirIsObject(bucket, parent string) error {
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var stat func(string) error
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stat = func(p string) error {
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if p == "." {
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return nil
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}
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_, err := xl.getObjectInfo(bucket, p)
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if err == nil {
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// If there is already a file at prefix "p" return error.
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return errFileAccessDenied
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}
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if err == errFileNotFound {
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// Check if there is a file as one of the parent paths.
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return stat(path.Dir(p))
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}
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return err
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}
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return stat(parent)
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}
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2016-04-29 23:24:10 +02:00
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func (xl xlObjects) CompleteMultipartUpload(bucket string, object string, uploadID string, parts []completePart) (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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2016-05-08 10:58:05 +02:00
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// Verify whether the bucket exists.
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if !isBucketExist(xl.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{
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Bucket: bucket,
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Object: object,
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}
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}
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2016-05-08 10:58:05 +02:00
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if !isUploadIDExists(xl.storage, bucket, object, uploadID) {
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return "", InvalidUploadID{UploadID: uploadID}
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}
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2016-05-19 00:05:23 +02:00
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// Hold lock so that
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// 1) no one aborts this multipart upload
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// 2) no one does a parallel complete-multipart-upload on this multipart upload
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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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2016-05-08 11:38:35 +02:00
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// Calculate s3 compatible md5sum for complete multipart.
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s3MD5, err := completeMultipartMD5(parts...)
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if err != nil {
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return "", err
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}
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2016-05-05 00:28:58 +02:00
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var metadata = MultipartObjectInfo{}
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var errs = make([]error, len(parts))
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2016-05-19 04:54:25 +02:00
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uploadIDIncompletePath := path.Join(mpartMetaPrefix, bucket, object, uploadID, incompleteFile)
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objMeta, err := getMultipartObjectMeta(xl.storage, uploadIDIncompletePath)
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if err != nil {
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return "", toObjectErr(err, minioMetaBucket, uploadIDIncompletePath)
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}
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2016-05-08 11:38:35 +02:00
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// Waitgroup to wait for go-routines.
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var wg = &sync.WaitGroup{}
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// Loop through all parts, validate them and then commit to disk.
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2016-05-09 08:49:49 +02:00
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for i, part := range parts {
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2016-05-04 01:10:24 +02:00
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// Construct part suffix.
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2016-05-07 11:08:03 +02:00
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partSuffix := fmt.Sprintf("%.5d.%s", part.PartNumber, part.ETag)
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multipartPartFile := path.Join(mpartMetaPrefix, bucket, object, uploadID, partSuffix)
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var fi FileInfo
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fi, err = xl.storage.StatFile(minioMetaBucket, multipartPartFile)
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2016-05-02 02:52:16 +02:00
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if err != nil {
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2016-05-04 01:10:24 +02:00
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if err == errFileNotFound {
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return "", InvalidPart{}
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}
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2016-05-02 02:52:16 +02:00
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return "", err
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}
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2016-05-09 08:49:49 +02:00
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// All parts except the last part has to be atleast 5MB.
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if (i < len(parts)-1) && !isMinAllowedPartSize(fi.Size) {
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2016-05-08 21:06:05 +02:00
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return "", PartTooSmall{}
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}
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2016-05-05 00:28:58 +02:00
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// Update metadata parts.
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metadata.Parts = append(metadata.Parts, MultipartPartInfo{
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PartNumber: part.PartNumber,
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ETag: part.ETag,
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Size: fi.Size,
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})
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metadata.Size += fi.Size
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2016-05-08 11:38:35 +02:00
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}
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2016-05-13 20:52:36 +02:00
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// check if an object is present as one of the parent dir.
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if err = xl.parentDirIsObject(bucket, path.Dir(object)); err != nil {
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return "", toObjectErr(err, bucket, object)
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}
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2016-05-08 11:38:35 +02:00
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// Save successfully calculated md5sum.
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metadata.MD5Sum = s3MD5
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2016-05-19 04:54:25 +02:00
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metadata.ContentType = objMeta["content-type"]
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2016-05-20 02:10:08 +02:00
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metadata.ContentEncoding = objMeta["content-encoding"]
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2016-05-19 04:54:25 +02:00
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2016-05-05 00:28:58 +02:00
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// Save modTime as well as the current time.
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metadata.ModTime = time.Now().UTC()
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// Create temporary multipart meta file to write and then rename.
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2016-05-17 00:40:57 +02:00
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multipartMetaSuffix := fmt.Sprintf("%s.%s", uploadID, multipartMetaFile)
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tempMultipartMetaFile := path.Join(tmpMetaPrefix, bucket, object, multipartMetaSuffix)
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2016-05-04 01:10:24 +02:00
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w, err := xl.storage.CreateFile(minioMetaBucket, tempMultipartMetaFile)
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if err != nil {
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return "", toObjectErr(err, bucket, object)
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}
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encoder := json.NewEncoder(w)
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err = encoder.Encode(&metadata)
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if err != nil {
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if err = safeCloseAndRemove(w); err != nil {
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2016-05-13 20:52:36 +02:00
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return "", toObjectErr(err, bucket, object)
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2016-05-01 10:25:48 +02:00
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}
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2016-05-13 20:52:36 +02:00
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return "", toObjectErr(err, bucket, object)
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2016-05-01 10:25:48 +02:00
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}
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2016-05-04 01:10:24 +02:00
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// Close the writer.
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if err = w.Close(); err != nil {
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2016-05-06 05:28:22 +02:00
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if err = safeCloseAndRemove(w); err != nil {
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2016-05-13 20:52:36 +02:00
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return "", toObjectErr(err, bucket, object)
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2016-05-06 05:28:22 +02:00
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}
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2016-05-13 20:52:36 +02:00
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return "", toObjectErr(err, bucket, object)
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2016-05-01 10:25:48 +02:00
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}
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2016-05-09 21:09:48 +02:00
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// Attempt a Rename of multipart meta file to final namespace.
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2016-05-13 20:52:36 +02:00
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multipartObjFile := path.Join(mpartMetaPrefix, bucket, object, uploadID, multipartMetaFile)
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err = xl.storage.RenameFile(minioMetaBucket, tempMultipartMetaFile, minioMetaBucket, multipartObjFile)
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2016-05-04 01:10:24 +02:00
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if err != nil {
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2016-05-06 05:28:22 +02:00
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if derr := xl.storage.DeleteFile(minioMetaBucket, tempMultipartMetaFile); derr != nil {
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return "", toObjectErr(err, minioMetaBucket, tempMultipartMetaFile)
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}
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2016-05-04 01:10:24 +02:00
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return "", toObjectErr(err, bucket, multipartObjFile)
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}
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2016-04-16 21:48:41 +02:00
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2016-05-09 21:09:48 +02:00
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// Loop through and atomically rename the parts to their actual location.
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for index, part := range parts {
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wg.Add(1)
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go func(index int, part completePart) {
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defer wg.Done()
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partSuffix := fmt.Sprintf("%.5d.%s", part.PartNumber, part.ETag)
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2016-05-13 20:52:36 +02:00
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src := path.Join(mpartMetaPrefix, bucket, object, uploadID, partSuffix)
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dst := path.Join(mpartMetaPrefix, bucket, object, uploadID, partNumToPartFileName(part.PartNumber))
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errs[index] = xl.storage.RenameFile(minioMetaBucket, src, minioMetaBucket, dst)
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2016-05-16 23:31:28 +02:00
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errorIf(errs[index], "Unable to rename file %s to %s.", src, dst)
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2016-05-09 21:09:48 +02:00
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}(index, part)
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}
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// Wait for all the renames to finish.
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wg.Wait()
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// Loop through errs list and return first error.
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for _, err := range errs {
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if err != nil {
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return "", toObjectErr(err, bucket, object)
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2016-05-06 05:28:22 +02:00
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}
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}
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2016-05-09 21:09:48 +02:00
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// Delete the incomplete file place holder.
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2016-05-16 23:31:28 +02:00
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err = xl.storage.DeleteFile(minioMetaBucket, uploadIDIncompletePath)
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2016-05-06 05:28:22 +02:00
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if err != nil {
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2016-05-16 23:31:28 +02:00
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return "", toObjectErr(err, minioMetaBucket, uploadIDIncompletePath)
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2016-05-06 05:28:22 +02:00
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}
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2016-05-07 11:08:03 +02:00
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2016-05-19 00:05:23 +02:00
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// Hold write lock on the destination before rename
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nsMutex.Lock(bucket, object)
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defer nsMutex.Unlock(bucket, object)
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2016-05-13 20:52:36 +02:00
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// Delete if an object already exists.
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// FIXME: rename it to tmp file and delete only after
|
|
|
|
// the newly uploaded file is renamed from tmp location to
|
|
|
|
// the original location.
|
2016-05-20 02:10:33 +02:00
|
|
|
// Verify if the object is a multipart object.
|
|
|
|
if isMultipartObject(xl.storage, bucket, object) {
|
|
|
|
err = xl.deleteMultipartObject(bucket, object)
|
|
|
|
if err != nil {
|
|
|
|
return "", toObjectErr(err, bucket, object)
|
|
|
|
}
|
|
|
|
return s3MD5, nil
|
|
|
|
}
|
2016-05-13 20:52:36 +02:00
|
|
|
err = xl.deleteObject(bucket, object)
|
2016-05-20 02:10:33 +02:00
|
|
|
if err != nil {
|
2016-05-13 20:52:36 +02:00
|
|
|
return "", toObjectErr(err, bucket, object)
|
|
|
|
}
|
|
|
|
|
2016-05-16 23:31:28 +02:00
|
|
|
uploadIDPath := path.Join(mpartMetaPrefix, bucket, object, uploadID)
|
|
|
|
if err = xl.storage.RenameFile(minioMetaBucket, uploadIDPath, bucket, object); err != nil {
|
2016-05-13 20:52:36 +02:00
|
|
|
return "", toObjectErr(err, bucket, object)
|
|
|
|
}
|
2016-05-19 00:05:23 +02:00
|
|
|
|
|
|
|
// Hold the lock so that two parallel complete-multipart-uploads do no
|
|
|
|
// leave a stale uploads.json behind.
|
|
|
|
nsMutex.Lock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object))
|
|
|
|
defer nsMutex.Unlock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object))
|
|
|
|
|
2016-05-09 21:09:48 +02:00
|
|
|
// Validate if there are other incomplete upload-id's present for
|
|
|
|
// the object, if yes do not attempt to delete 'uploads.json'.
|
|
|
|
var entries []string
|
|
|
|
if entries, err = xl.storage.ListDir(minioMetaBucket, path.Join(mpartMetaPrefix, bucket, object)); err == nil {
|
|
|
|
if len(entries) > 1 {
|
|
|
|
return s3MD5, nil
|
|
|
|
}
|
|
|
|
}
|
2016-05-13 20:52:36 +02:00
|
|
|
|
2016-05-07 11:08:03 +02:00
|
|
|
uploadsJSONPath := path.Join(mpartMetaPrefix, bucket, object, uploadsJSONFile)
|
|
|
|
err = xl.storage.DeleteFile(minioMetaBucket, uploadsJSONPath)
|
|
|
|
if err != nil {
|
|
|
|
return "", toObjectErr(err, minioMetaBucket, uploadsJSONPath)
|
|
|
|
}
|
|
|
|
|
2016-03-28 06:52:38 +02:00
|
|
|
// Return md5sum.
|
2016-04-16 21:48:41 +02:00
|
|
|
return s3MD5, nil
|
2016-04-11 10:29:18 +02:00
|
|
|
}
|
|
|
|
|
2016-05-03 01:57:31 +02:00
|
|
|
// AbortMultipartUpload - aborts a multipart upload.
|
2016-04-29 23:24:10 +02:00
|
|
|
func (xl xlObjects) AbortMultipartUpload(bucket, object, uploadID string) error {
|
2016-05-03 01:57:31 +02:00
|
|
|
return abortMultipartUploadCommon(xl.storage, bucket, object, uploadID)
|
2016-04-11 10:29:18 +02:00
|
|
|
}
|