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588 lines
20 KiB
Go
588 lines
20 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 main
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import (
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"crypto/md5"
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"encoding/hex"
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"fmt"
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"io"
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"path"
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"strconv"
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"strings"
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"time"
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"github.com/skyrings/skyring-common/tools/uuid"
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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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// newMultipartUploadCommon - initialize a new multipart, is a common function for both object layers.
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func (fs fsObjects) newMultipartUploadCommon(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 !fs.isBucketExist(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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// No metadata is set, allocate a new one.
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if meta == nil {
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meta = make(map[string]string)
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}
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// Initialize `fs.json` values.
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fsMeta := newFSMetaV1()
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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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uploadID = getUUID()
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initiated := time.Now().UTC()
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// Create 'uploads.json'
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if err = writeUploadJSON(bucket, object, uploadID, initiated, fs.storage); err != nil {
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return "", err
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}
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uploadIDPath := path.Join(mpartMetaPrefix, bucket, object, uploadID)
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tempUploadIDPath := path.Join(tmpMetaPrefix, bucket, object, uploadID)
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if err = fs.writeFSMetadata(minioMetaBucket, tempUploadIDPath, fsMeta); err != nil {
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return "", toObjectErr(err, minioMetaBucket, tempUploadIDPath)
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}
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err = fs.storage.RenameFile(minioMetaBucket, path.Join(tempUploadIDPath, fsMetaJSONFile), minioMetaBucket, path.Join(uploadIDPath, fsMetaJSONFile))
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if err != nil {
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if dErr := fs.storage.DeleteFile(minioMetaBucket, path.Join(tempUploadIDPath, fsMetaJSONFile)); 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 success.
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return uploadID, nil
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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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// listUploadsInfo - list all uploads info.
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func (fs fsObjects) listUploadsInfo(prefixPath string) (uploads []uploadInfo, err error) {
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splitPrefixes := strings.SplitN(prefixPath, "/", 3)
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uploadIDs, err := readUploadsJSON(splitPrefixes[1], splitPrefixes[2], fs.storage)
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if err != nil {
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if err == errFileNotFound {
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return []uploadInfo{}, nil
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}
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return nil, err
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}
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uploads = uploadIDs.Uploads
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return uploads, nil
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}
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// listMultipartUploadsCommon - lists all multipart uploads, common function for both object layers.
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func (fs fsObjects) listMultipartUploadsCommon(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (ListMultipartsInfo, error) {
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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 !fs.isBucketExist(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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result.KeyMarker = keyMarker
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result.Prefix = prefix
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result.Delimiter = delimiter
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// Not using path.Join() as it strips off the trailing '/'.
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multipartPrefixPath := pathJoin(mpartMetaPrefix, bucket, prefix)
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if prefix == "" {
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// Should have a trailing "/" if prefix is ""
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// For ex. multipartPrefixPath should be "multipart/bucket/" if prefix is ""
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multipartPrefixPath += slashSeparator
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}
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multipartMarkerPath := ""
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if keyMarker != "" {
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multipartMarkerPath = pathJoin(mpartMetaPrefix, bucket, keyMarker)
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}
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var uploads []uploadMetadata
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var err error
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var eof bool
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if uploadIDMarker != "" {
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uploads, _, err = listMultipartUploadIDs(bucket, keyMarker, uploadIDMarker, maxUploads, fs.storage)
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if err != nil {
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return ListMultipartsInfo{}, err
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}
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maxUploads = maxUploads - len(uploads)
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}
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if maxUploads > 0 {
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walker := fs.lookupTreeWalk(listParams{minioMetaBucket, recursive, multipartMarkerPath, multipartPrefixPath})
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if walker == nil {
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walker = fs.startTreeWalk(minioMetaBucket, multipartPrefixPath, multipartMarkerPath, recursive, func(bucket, object string) bool {
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return fs.isMultipartUpload(bucket, object)
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})
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}
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for maxUploads > 0 {
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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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eof = true
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break
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}
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return ListMultipartsInfo{}, err
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}
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entry := strings.TrimPrefix(walkResult.entry, retainSlash(pathJoin(mpartMetaPrefix, bucket)))
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if strings.HasSuffix(walkResult.entry, slashSeparator) {
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uploads = append(uploads, uploadMetadata{
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Object: entry,
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})
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maxUploads--
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if maxUploads == 0 {
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if walkResult.end {
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eof = true
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break
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}
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}
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continue
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}
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var tmpUploads []uploadMetadata
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var end bool
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uploadIDMarker = ""
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tmpUploads, end, err = listMultipartUploadIDs(bucket, entry, uploadIDMarker, maxUploads, fs.storage)
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if err != nil {
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return ListMultipartsInfo{}, err
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}
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uploads = append(uploads, tmpUploads...)
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maxUploads -= len(tmpUploads)
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if walkResult.end && end {
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eof = true
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break
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}
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}
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}
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// Loop through all the received uploads fill in the multiparts result.
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for _, upload := range uploads {
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var objectName string
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var uploadID string
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if strings.HasSuffix(upload.Object, slashSeparator) {
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// All directory entries are common prefixes.
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uploadID = "" // Upload ids are empty for CommonPrefixes.
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objectName = upload.Object
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result.CommonPrefixes = append(result.CommonPrefixes, objectName)
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} else {
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uploadID = upload.UploadID
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objectName = upload.Object
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result.Uploads = append(result.Uploads, upload)
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}
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result.NextKeyMarker = objectName
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result.NextUploadIDMarker = uploadID
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}
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result.IsTruncated = !eof
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if !result.IsTruncated {
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result.NextKeyMarker = ""
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result.NextUploadIDMarker = ""
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}
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return result, nil
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}
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// ListMultipartUploads - list multipart uploads.
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func (fs fsObjects) ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (ListMultipartsInfo, error) {
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return fs.listMultipartUploadsCommon(bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploads)
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}
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// NewMultipartUpload - initialize a new multipart upload, returns a unique id.
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func (fs fsObjects) NewMultipartUpload(bucket, object string, meta map[string]string) (string, error) {
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meta = make(map[string]string) // Reset the meta value, we are not going to save headers for fs.
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return fs.newMultipartUploadCommon(bucket, object, meta)
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}
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// putObjectPartCommon - put object part.
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func (fs fsObjects) putObjectPartCommon(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 !fs.isBucketExist(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 !fs.isUploadIDExists(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("object%d", partID)
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tmpPartPath := path.Join(tmpMetaPrefix, bucket, object, uploadID, partSuffix)
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// Initialize md5 writer.
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md5Writer := md5.New()
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var buf = make([]byte, blockSize)
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for {
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n, err := io.ReadFull(data, buf)
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if err == io.EOF {
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break
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}
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if err != nil && err != io.ErrUnexpectedEOF {
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return "", toObjectErr(err, bucket, object)
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}
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// Update md5 writer.
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md5Writer.Write(buf[:n])
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m, err := fs.storage.AppendFile(minioMetaBucket, tmpPartPath, buf[:n])
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if err != nil {
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return "", toObjectErr(err, bucket, object)
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}
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if m != int64(len(buf[:n])) {
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return "", toObjectErr(errUnexpected, 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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return "", BadDigest{md5Hex, newMD5Hex}
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}
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}
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uploadIDPath := path.Join(mpartMetaPrefix, bucket, object, uploadID)
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fsMeta, err := fs.readFSMetadata(minioMetaBucket, uploadIDPath)
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if err != nil {
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return "", toObjectErr(err, minioMetaBucket, uploadIDPath)
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}
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fsMeta.AddObjectPart(partID, partSuffix, newMD5Hex, size)
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partPath := path.Join(mpartMetaPrefix, bucket, object, uploadID, partSuffix)
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err = fs.storage.RenameFile(minioMetaBucket, tmpPartPath, minioMetaBucket, partPath)
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if err != nil {
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if dErr := fs.storage.DeleteFile(minioMetaBucket, tmpPartPath); dErr != nil {
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return "", toObjectErr(dErr, minioMetaBucket, tmpPartPath)
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}
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return "", toObjectErr(err, minioMetaBucket, partPath)
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}
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uploadIDPath = path.Join(mpartMetaPrefix, bucket, object, uploadID)
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tempUploadIDPath := path.Join(tmpMetaPrefix, bucket, object, uploadID)
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if err = fs.writeFSMetadata(minioMetaBucket, tempUploadIDPath, fsMeta); err != nil {
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return "", toObjectErr(err, minioMetaBucket, tempUploadIDPath)
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}
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err = fs.storage.RenameFile(minioMetaBucket, path.Join(tempUploadIDPath, fsMetaJSONFile), minioMetaBucket, path.Join(uploadIDPath, fsMetaJSONFile))
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if err != nil {
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if dErr := fs.storage.DeleteFile(minioMetaBucket, path.Join(tempUploadIDPath, fsMetaJSONFile)); 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 newMD5Hex, nil
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}
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// PutObjectPart - writes the multipart upload chunks.
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func (fs fsObjects) PutObjectPart(bucket, object, uploadID string, partID int, size int64, data io.Reader, md5Hex string) (string, error) {
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return fs.putObjectPartCommon(bucket, object, uploadID, partID, size, data, md5Hex)
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}
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func (fs fsObjects) listObjectPartsCommon(bucket, object, uploadID string, partNumberMarker, maxParts int) (ListPartsInfo, error) {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return ListPartsInfo{}, BucketNameInvalid{Bucket: bucket}
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}
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// Verify whether the bucket exists.
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if !fs.isBucketExist(bucket) {
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return ListPartsInfo{}, BucketNotFound{Bucket: bucket}
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}
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if !IsValidObjectName(object) {
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return ListPartsInfo{}, ObjectNameInvalid{Bucket: bucket, Object: object}
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}
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if !fs.isUploadIDExists(bucket, object, uploadID) {
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return ListPartsInfo{}, InvalidUploadID{UploadID: uploadID}
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}
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// Hold lock so that there is no competing abort-multipart-upload or complete-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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result := ListPartsInfo{}
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uploadIDPath := path.Join(mpartMetaPrefix, bucket, object, uploadID)
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fsMeta, err := fs.readFSMetadata(minioMetaBucket, uploadIDPath)
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if err != nil {
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return ListPartsInfo{}, toObjectErr(err, minioMetaBucket, uploadIDPath)
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}
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// Only parts with higher part numbers will be listed.
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partIdx := fsMeta.ObjectPartIndex(partNumberMarker)
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parts := fsMeta.Parts
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if partIdx != -1 {
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parts = fsMeta.Parts[partIdx+1:]
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}
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count := maxParts
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for _, part := range parts {
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var fi FileInfo
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partNamePath := path.Join(mpartMetaPrefix, bucket, object, uploadID, part.Name)
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fi, err = fs.storage.StatFile(minioMetaBucket, partNamePath)
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if err != nil {
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return ListPartsInfo{}, toObjectErr(err, minioMetaBucket, partNamePath)
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}
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result.Parts = append(result.Parts, partInfo{
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PartNumber: part.Number,
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ETag: part.ETag,
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LastModified: fi.ModTime,
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Size: fi.Size,
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})
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count--
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if count == 0 {
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break
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}
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}
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// If listed entries are more than maxParts, we set IsTruncated as true.
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if len(parts) > len(result.Parts) {
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result.IsTruncated = true
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// Make sure to fill next part number marker if IsTruncated is
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// true for subsequent listing.
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nextPartNumberMarker := result.Parts[len(result.Parts)-1].PartNumber
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result.NextPartNumberMarker = nextPartNumberMarker
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}
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result.Bucket = bucket
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result.Object = object
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result.UploadID = uploadID
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result.MaxParts = maxParts
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return result, nil
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}
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func (fs fsObjects) ListObjectParts(bucket, object, uploadID string, partNumberMarker, maxParts int) (ListPartsInfo, error) {
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return fs.listObjectPartsCommon(bucket, object, uploadID, partNumberMarker, maxParts)
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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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func (fs fsObjects) 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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// Verify whether the bucket exists.
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if !fs.isBucketExist(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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if !fs.isUploadIDExists(bucket, object, uploadID) {
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return "", InvalidUploadID{UploadID: uploadID}
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}
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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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tempObj := path.Join(tmpMetaPrefix, bucket, object, uploadID, "object1")
|
|
var buffer = make([]byte, blockSize)
|
|
|
|
// Loop through all parts, validate them and then commit to disk.
|
|
for i, part := range parts {
|
|
// Construct part suffix.
|
|
partSuffix := fmt.Sprintf("object%d", part.PartNumber)
|
|
multipartPartFile := path.Join(mpartMetaPrefix, bucket, object, uploadID, partSuffix)
|
|
var fi FileInfo
|
|
fi, err = fs.storage.StatFile(minioMetaBucket, multipartPartFile)
|
|
if err != nil {
|
|
if err == errFileNotFound {
|
|
return "", InvalidPart{}
|
|
}
|
|
return "", toObjectErr(err, minioMetaBucket, multipartPartFile)
|
|
}
|
|
// All parts except the last part has to be atleast 5MB.
|
|
if (i < len(parts)-1) && !isMinAllowedPartSize(fi.Size) {
|
|
return "", PartTooSmall{}
|
|
}
|
|
offset := int64(0)
|
|
totalLeft := fi.Size
|
|
for totalLeft > 0 {
|
|
var n int64
|
|
n, err = fs.storage.ReadFile(minioMetaBucket, multipartPartFile, offset, buffer)
|
|
if err != nil {
|
|
if err == errFileNotFound {
|
|
return "", InvalidPart{}
|
|
}
|
|
return "", toObjectErr(err, minioMetaBucket, multipartPartFile)
|
|
}
|
|
n, err = fs.storage.AppendFile(minioMetaBucket, tempObj, buffer[:n])
|
|
if err != nil {
|
|
return "", toObjectErr(err, minioMetaBucket, tempObj)
|
|
}
|
|
offset += n
|
|
totalLeft -= n
|
|
}
|
|
}
|
|
|
|
// Rename the file back to original location, if not delete the temporary object.
|
|
err = fs.storage.RenameFile(minioMetaBucket, tempObj, bucket, object)
|
|
if err != nil {
|
|
if dErr := fs.storage.DeleteFile(minioMetaBucket, tempObj); dErr != nil {
|
|
return "", toObjectErr(dErr, minioMetaBucket, tempObj)
|
|
}
|
|
return "", toObjectErr(err, bucket, object)
|
|
}
|
|
|
|
// Cleanup all the parts if everything else has been safely committed.
|
|
if err = cleanupUploadedParts(bucket, object, uploadID, fs.storage); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
// Return md5sum.
|
|
return s3MD5, nil
|
|
}
|
|
|
|
// abortMultipartUploadCommon - aborts a multipart upload, common
|
|
// function used by both object layers.
|
|
func (fs fsObjects) abortMultipartUploadCommon(bucket, object, uploadID string) error {
|
|
// Verify if bucket is valid.
|
|
if !IsValidBucketName(bucket) {
|
|
return BucketNameInvalid{Bucket: bucket}
|
|
}
|
|
if !fs.isBucketExist(bucket) {
|
|
return BucketNotFound{Bucket: bucket}
|
|
}
|
|
if !IsValidObjectName(object) {
|
|
return ObjectNameInvalid{Bucket: bucket, Object: object}
|
|
}
|
|
if !fs.isUploadIDExists(bucket, object, uploadID) {
|
|
return InvalidUploadID{UploadID: uploadID}
|
|
}
|
|
|
|
// Hold lock so that there is no competing complete-multipart-upload or put-object-part.
|
|
nsMutex.Lock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID))
|
|
defer nsMutex.Unlock(minioMetaBucket, pathJoin(mpartMetaPrefix, bucket, object, uploadID))
|
|
|
|
// Cleanup all uploaded parts.
|
|
if err := cleanupUploadedParts(bucket, object, uploadID, fs.storage); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Validate if there are other incomplete upload-id's present for
|
|
// the object, if yes do not attempt to delete 'uploads.json'.
|
|
uploadsJSON, err := readUploadsJSON(bucket, object, fs.storage)
|
|
if err == nil {
|
|
uploadIDIdx := uploadsJSON.Index(uploadID)
|
|
if uploadIDIdx != -1 {
|
|
uploadsJSON.Uploads = append(uploadsJSON.Uploads[:uploadIDIdx], uploadsJSON.Uploads[uploadIDIdx+1:]...)
|
|
}
|
|
if len(uploadsJSON.Uploads) > 0 {
|
|
err = updateUploadsJSON(bucket, object, uploadsJSON, fs.storage)
|
|
if err != nil {
|
|
return toObjectErr(err, bucket, object)
|
|
}
|
|
return nil
|
|
}
|
|
}
|
|
if err = fs.storage.DeleteFile(minioMetaBucket, path.Join(mpartMetaPrefix, bucket, object, uploadsJSONFile)); err != nil {
|
|
return toObjectErr(err, minioMetaBucket, path.Join(mpartMetaPrefix, bucket, object))
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// AbortMultipartUpload - aborts a multipart upload.
|
|
func (fs fsObjects) AbortMultipartUpload(bucket, object, uploadID string) error {
|
|
return fs.abortMultipartUploadCommon(bucket, object, uploadID)
|
|
}
|