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Copy pathfs-v1-multipart.go
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978 lines (833 loc) · 31.4 KB
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/*
* Minio Cloud Storage, (C) 2016, 2017 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"crypto/md5"
"encoding/hex"
"fmt"
"hash"
"io"
"os"
pathutil "path"
"strings"
"time"
"github.com/minio/minio/pkg/lock"
"github.com/minio/sha256-simd"
)
// Returns if the prefix is a multipart upload.
func (fs fsObjects) isMultipartUpload(bucket, prefix string) bool {
uploadsIDPath := pathJoin(fs.fsPath, bucket, prefix, uploadsJSONFile)
_, err := fsStatFile(uploadsIDPath)
if err != nil {
if err == errFileNotFound {
return false
}
errorIf(err, "Unable to access uploads.json "+uploadsIDPath)
return false
}
return true
}
// Delete uploads.json file wrapper
func (fs fsObjects) deleteUploadsJSON(bucket, object, uploadID string) error {
multipartBucketPath := pathJoin(fs.fsPath, minioMetaMultipartBucket)
uploadPath := pathJoin(multipartBucketPath, bucket, object)
uploadsMetaPath := pathJoin(uploadPath, uploadsJSONFile)
tmpDir := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID)
return fsRemoveMeta(multipartBucketPath, uploadsMetaPath, tmpDir)
}
// Removes the uploadID, called either by CompleteMultipart of AbortMultipart. If the resuling uploads
// slice is empty then we remove/purge the file.
func (fs fsObjects) removeUploadID(bucket, object, uploadID string, rwlk *lock.LockedFile) error {
uploadIDs := uploadsV1{}
_, err := uploadIDs.ReadFrom(rwlk)
if err != nil {
return err
}
// Removes upload id from the uploads list.
uploadIDs.RemoveUploadID(uploadID)
// Check this is the last entry.
if uploadIDs.IsEmpty() {
// No more uploads left, so we delete `uploads.json` file.
return fs.deleteUploadsJSON(bucket, object, uploadID)
} // else not empty
// Write update `uploads.json`.
_, err = uploadIDs.WriteTo(rwlk)
return err
}
// Adds a new uploadID if no previous `uploads.json` is
// found we initialize a new one.
func (fs fsObjects) addUploadID(bucket, object, uploadID string, initiated time.Time, rwlk *lock.LockedFile) error {
uploadIDs := uploadsV1{}
_, err := uploadIDs.ReadFrom(rwlk)
// For all unexpected errors, we return.
if err != nil && errorCause(err) != io.EOF {
return err
}
// If we couldn't read anything, we assume a default
// (empty) upload info.
if errorCause(err) == io.EOF {
uploadIDs = newUploadsV1("fs")
}
// Adds new upload id to the list.
uploadIDs.AddUploadID(uploadID, initiated)
// Write update `uploads.json`.
_, err = uploadIDs.WriteTo(rwlk)
return err
}
// listMultipartUploadIDs - list all the upload ids from a marker up to 'count'.
func (fs fsObjects) listMultipartUploadIDs(bucketName, objectName, uploadIDMarker string, count int) ([]uploadMetadata, bool, error) {
var uploads []uploadMetadata
// Hold the lock so that two parallel complete-multipart-uploads
// do not leave a stale uploads.json behind.
objectMPartPathLock := globalNSMutex.NewNSLock(minioMetaMultipartBucket, pathJoin(bucketName, objectName))
objectMPartPathLock.RLock()
defer objectMPartPathLock.RUnlock()
uploadsPath := pathJoin(bucketName, objectName, uploadsJSONFile)
rlk, err := fs.rwPool.Open(pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadsPath))
if err != nil {
if err == errFileNotFound || err == errFileAccessDenied {
return nil, true, nil
}
return nil, false, traceError(err)
}
defer fs.rwPool.Close(pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadsPath))
// Read `uploads.json`.
uploadIDs := uploadsV1{}
if _, err = uploadIDs.ReadFrom(rlk.LockedFile); err != nil {
return nil, false, err
}
index := 0
if uploadIDMarker != "" {
for ; index < len(uploadIDs.Uploads); index++ {
if uploadIDs.Uploads[index].UploadID == uploadIDMarker {
// Skip the uploadID as it would already be listed in previous listing.
index++
break
}
}
}
for index < len(uploadIDs.Uploads) {
uploads = append(uploads, uploadMetadata{
Object: objectName,
UploadID: uploadIDs.Uploads[index].UploadID,
Initiated: uploadIDs.Uploads[index].Initiated,
})
count--
index++
if count == 0 {
break
}
}
end := (index == len(uploadIDs.Uploads))
return uploads, end, nil
}
// listMultipartUploads - lists all multipart uploads.
func (fs fsObjects) listMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (lmi ListMultipartsInfo, e error) {
result := ListMultipartsInfo{}
recursive := true
if delimiter == slashSeparator {
recursive = false
}
result.IsTruncated = true
result.MaxUploads = maxUploads
result.KeyMarker = keyMarker
result.Prefix = prefix
result.Delimiter = delimiter
// Not using path.Join() as it strips off the trailing '/'.
multipartPrefixPath := pathJoin(bucket, prefix)
if prefix == "" {
// Should have a trailing "/" if prefix is ""
// For ex. multipartPrefixPath should be "multipart/bucket/" if prefix is ""
multipartPrefixPath += slashSeparator
}
multipartMarkerPath := ""
if keyMarker != "" {
multipartMarkerPath = pathJoin(bucket, keyMarker)
}
var uploads []uploadMetadata
var err error
var eof bool
if uploadIDMarker != "" {
uploads, _, err = fs.listMultipartUploadIDs(bucket, keyMarker, uploadIDMarker, maxUploads)
if err != nil {
return lmi, err
}
maxUploads = maxUploads - len(uploads)
}
var walkResultCh chan treeWalkResult
var endWalkCh chan struct{}
// true only for xl.ListObjectsHeal(), set to false.
heal := false
// Proceed to list only if we have more uploads to be listed.
if maxUploads > 0 {
listPrms := listParams{minioMetaMultipartBucket, recursive, multipartMarkerPath, multipartPrefixPath, heal}
// Pop out any previously waiting marker.
walkResultCh, endWalkCh = fs.listPool.Release(listPrms)
if walkResultCh == nil {
endWalkCh = make(chan struct{})
isLeaf := fs.isMultipartUpload
listDir := fs.listDirFactory(isLeaf)
walkResultCh = startTreeWalk(minioMetaMultipartBucket, multipartPrefixPath,
multipartMarkerPath, recursive, listDir, isLeaf, endWalkCh)
}
// List until maxUploads requested.
for maxUploads > 0 {
walkResult, ok := <-walkResultCh
if !ok {
// Closed channel.
eof = true
break
}
// For any walk error return right away.
if walkResult.err != nil {
// File not found or Disk not found is a valid case.
if isErrIgnored(walkResult.err, fsTreeWalkIgnoredErrs...) {
eof = true
break
}
return lmi, walkResult.err
}
entry := strings.TrimPrefix(walkResult.entry, retainSlash(bucket))
if hasSuffix(walkResult.entry, slashSeparator) {
uploads = append(uploads, uploadMetadata{
Object: entry,
})
maxUploads--
if maxUploads == 0 {
if walkResult.end {
eof = true
break
}
}
continue
}
var tmpUploads []uploadMetadata
var end bool
uploadIDMarker = ""
tmpUploads, end, err = fs.listMultipartUploadIDs(bucket, entry, uploadIDMarker, maxUploads)
if err != nil {
return lmi, err
}
uploads = append(uploads, tmpUploads...)
maxUploads -= len(tmpUploads)
if walkResult.end && end {
eof = true
break
}
}
}
// Loop through all the received uploads fill in the multiparts result.
for _, upload := range uploads {
var objectName string
var uploadID string
if hasSuffix(upload.Object, slashSeparator) {
// All directory entries are common prefixes.
uploadID = "" // Upload ids are empty for CommonPrefixes.
objectName = upload.Object
result.CommonPrefixes = append(result.CommonPrefixes, objectName)
} else {
uploadID = upload.UploadID
objectName = upload.Object
result.Uploads = append(result.Uploads, upload)
}
result.NextKeyMarker = objectName
result.NextUploadIDMarker = uploadID
}
if !eof {
// Save the go-routine state in the pool so that it can continue from where it left off on
// the next request.
fs.listPool.Set(listParams{bucket, recursive, result.NextKeyMarker, prefix, heal}, walkResultCh, endWalkCh)
}
result.IsTruncated = !eof
if !result.IsTruncated {
result.NextKeyMarker = ""
result.NextUploadIDMarker = ""
}
// Success.
return result, nil
}
// ListMultipartUploads - lists all the pending multipart uploads on a
// bucket. Additionally takes 'prefix, keyMarker, uploadIDmarker and a
// delimiter' which allows us to list uploads match a particular
// prefix or lexically starting from 'keyMarker' or delimiting the
// output to get a directory like listing.
//
// Implements S3 compatible ListMultipartUploads API. The resulting
// ListMultipartsInfo structure is unmarshalled directly into XML and
// replied back to the client.
func (fs fsObjects) ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (lmi ListMultipartsInfo, e error) {
if err := checkListMultipartArgs(bucket, prefix, keyMarker, uploadIDMarker, delimiter, fs); err != nil {
return lmi, err
}
if _, err := fs.statBucketDir(bucket); err != nil {
return lmi, toObjectErr(err, bucket)
}
return fs.listMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploads)
}
// newMultipartUpload - wrapper for initializing a new multipart
// request, returns back a unique upload id.
//
// Internally this function creates 'uploads.json' associated for the
// incoming object at '.minio.sys/multipart/bucket/object/uploads.json' on
// all the disks. `uploads.json` carries metadata regarding on going
// multipart operation on the object.
func (fs fsObjects) newMultipartUpload(bucket string, object string, meta map[string]string) (uploadID string, err error) {
// Initialize `fs.json` values.
fsMeta := newFSMetaV1()
// Save additional metadata.
fsMeta.Meta = meta
uploadID = mustGetUUID()
initiated := UTCNow()
// Add upload ID to uploads.json
uploadsPath := pathJoin(bucket, object, uploadsJSONFile)
rwlk, err := fs.rwPool.Create(pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadsPath))
if err != nil {
return "", toObjectErr(traceError(err), bucket, object)
}
defer rwlk.Close()
uploadIDPath := pathJoin(bucket, object, uploadID)
fsMetaPath := pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadIDPath, fsMetaJSONFile)
metaFile, err := fs.rwPool.Create(fsMetaPath)
if err != nil {
return "", toObjectErr(traceError(err), bucket, object)
}
defer metaFile.Close()
// Add a new upload id.
if err = fs.addUploadID(bucket, object, uploadID, initiated, rwlk); err != nil {
return "", toObjectErr(err, bucket, object)
}
// Write all the set metadata.
if _, err = fsMeta.WriteTo(metaFile); err != nil {
return "", toObjectErr(err, bucket, object)
}
// Return success.
return uploadID, nil
}
// NewMultipartUpload - initialize a new multipart upload, returns a
// unique id. The unique id returned here is of UUID form, for each
// subsequent request each UUID is unique.
//
// Implements S3 compatible initiate multipart API.
func (fs fsObjects) NewMultipartUpload(bucket, object string, meta map[string]string) (string, error) {
if err := checkNewMultipartArgs(bucket, object, fs); err != nil {
return "", err
}
if _, err := fs.statBucketDir(bucket); err != nil {
return "", toObjectErr(err, bucket)
}
// Hold the lock so that two parallel complete-multipart-uploads
// do not leave a stale uploads.json behind.
objectMPartPathLock := globalNSMutex.NewNSLock(minioMetaMultipartBucket, pathJoin(bucket, object))
objectMPartPathLock.Lock()
defer objectMPartPathLock.Unlock()
return fs.newMultipartUpload(bucket, object, meta)
}
// Returns if a new part can be appended to fsAppendDataFile.
func partToAppend(fsMeta fsMetaV1, fsAppendMeta fsMetaV1) (part objectPartInfo, appendNeeded bool) {
if len(fsMeta.Parts) == 0 {
return
}
// As fsAppendMeta.Parts will be sorted len(fsAppendMeta.Parts) will naturally be the next part number
nextPartNum := len(fsAppendMeta.Parts) + 1
nextPartIndex := fsMeta.ObjectPartIndex(nextPartNum)
if nextPartIndex == -1 {
return
}
return fsMeta.Parts[nextPartIndex], true
}
// CopyObjectPart - similar to PutObjectPart but reads data from an existing
// object. Internally incoming data is written to '.minio.sys/tmp' location
// and safely renamed to '.minio.sys/multipart' for reach parts.
func (fs fsObjects) CopyObjectPart(srcBucket, srcObject, dstBucket, dstObject, uploadID string, partID int, startOffset int64, length int64) (pi PartInfo, e error) {
if err := checkNewMultipartArgs(srcBucket, srcObject, fs); err != nil {
return pi, err
}
// Initialize pipe.
pipeReader, pipeWriter := io.Pipe()
go func() {
if gerr := fs.GetObject(srcBucket, srcObject, startOffset, length, pipeWriter); gerr != nil {
errorIf(gerr, "Unable to read %s/%s.", srcBucket, srcObject)
pipeWriter.CloseWithError(gerr)
return
}
pipeWriter.Close() // Close writer explicitly signalling we wrote all data.
}()
partInfo, err := fs.PutObjectPart(dstBucket, dstObject, uploadID, partID, length, pipeReader, "", "")
if err != nil {
return pi, toObjectErr(err, dstBucket, dstObject)
}
// Explicitly close the reader.
pipeReader.Close()
return partInfo, nil
}
// PutObjectPart - reads incoming data until EOF for the part file on
// an ongoing multipart transaction. Internally incoming data is
// written to '.minio.sys/tmp' location and safely renamed to
// '.minio.sys/multipart' for reach parts.
func (fs fsObjects) PutObjectPart(bucket, object, uploadID string, partID int, size int64, data io.Reader, md5Hex string, sha256sum string) (pi PartInfo, e error) {
if err := checkPutObjectPartArgs(bucket, object, fs); err != nil {
return pi, err
}
if _, err := fs.statBucketDir(bucket); err != nil {
return pi, toObjectErr(err, bucket)
}
// Hold the lock so that two parallel complete-multipart-uploads
// do not leave a stale uploads.json behind.
objectMPartPathLock := globalNSMutex.NewNSLock(minioMetaMultipartBucket, pathJoin(bucket, object))
objectMPartPathLock.Lock()
defer objectMPartPathLock.Unlock()
// Disallow any parallel abort or complete multipart operations.
uploadsPath := pathJoin(fs.fsPath, minioMetaMultipartBucket, bucket, object, uploadsJSONFile)
if _, err := fs.rwPool.Open(uploadsPath); err != nil {
if err == errFileNotFound || err == errFileAccessDenied {
return pi, traceError(InvalidUploadID{UploadID: uploadID})
}
return pi, toObjectErr(traceError(err), bucket, object)
}
defer fs.rwPool.Close(uploadsPath)
uploadIDPath := pathJoin(bucket, object, uploadID)
// Just check if the uploadID exists to avoid copy if it doesn't.
fsMetaPath := pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadIDPath, fsMetaJSONFile)
rwlk, err := fs.rwPool.Write(fsMetaPath)
if err != nil {
if err == errFileNotFound || err == errFileAccessDenied {
return pi, traceError(InvalidUploadID{UploadID: uploadID})
}
return pi, toObjectErr(traceError(err), bucket, object)
}
defer rwlk.Close()
fsMeta := fsMetaV1{}
_, err = fsMeta.ReadFrom(rwlk)
if err != nil {
return pi, toObjectErr(err, minioMetaMultipartBucket, fsMetaPath)
}
partSuffix := fmt.Sprintf("object%d", partID)
tmpPartPath := uploadID + "." + mustGetUUID() + "." + partSuffix
// Initialize md5 writer.
md5Writer := md5.New()
hashWriters := []io.Writer{md5Writer}
var sha256Writer hash.Hash
if sha256sum != "" {
sha256Writer = sha256.New()
hashWriters = append(hashWriters, sha256Writer)
}
multiWriter := io.MultiWriter(hashWriters...)
// Limit the reader to its provided size if specified.
var limitDataReader io.Reader
if size > 0 {
// This is done so that we can avoid erroneous clients sending more data than the set content size.
limitDataReader = io.LimitReader(data, size)
} else {
// else we read till EOF.
limitDataReader = data
}
teeReader := io.TeeReader(limitDataReader, multiWriter)
bufSize := int64(readSizeV1)
if size > 0 && bufSize > size {
bufSize = size
}
buf := make([]byte, int(bufSize))
fsPartPath := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID, tmpPartPath)
bytesWritten, cErr := fsCreateFile(fsPartPath, teeReader, buf, size)
if cErr != nil {
fsRemoveFile(fsPartPath)
return pi, toObjectErr(cErr, minioMetaTmpBucket, tmpPartPath)
}
// Should return IncompleteBody{} error when reader has fewer
// bytes than specified in request header.
if bytesWritten < size {
fsRemoveFile(fsPartPath)
return pi, traceError(IncompleteBody{})
}
// Delete temporary part in case of failure. If
// PutObjectPart succeeds then there would be nothing to
// delete.
defer fsRemoveFile(fsPartPath)
newMD5Hex := hex.EncodeToString(md5Writer.Sum(nil))
if md5Hex != "" {
if newMD5Hex != md5Hex {
return pi, traceError(BadDigest{md5Hex, newMD5Hex})
}
}
if sha256sum != "" {
newSHA256sum := hex.EncodeToString(sha256Writer.Sum(nil))
if newSHA256sum != sha256sum {
return pi, traceError(SHA256Mismatch{})
}
}
partPath := pathJoin(bucket, object, uploadID, partSuffix)
// Lock the part so that another part upload with same part-number gets blocked
// while the part is getting appended in the background.
partLock := globalNSMutex.NewNSLock(minioMetaMultipartBucket, partPath)
partLock.Lock()
fsNSPartPath := pathJoin(fs.fsPath, minioMetaMultipartBucket, partPath)
if err = fsRenameFile(fsPartPath, fsNSPartPath); err != nil {
partLock.Unlock()
return pi, toObjectErr(err, minioMetaMultipartBucket, partPath)
}
// Save the object part info in `fs.json`.
fsMeta.AddObjectPart(partID, partSuffix, newMD5Hex, size)
if _, err = fsMeta.WriteTo(rwlk); err != nil {
partLock.Unlock()
return pi, toObjectErr(err, minioMetaMultipartBucket, uploadIDPath)
}
partNamePath := pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadIDPath, partSuffix)
fi, err := fsStatFile(partNamePath)
if err != nil {
return pi, toObjectErr(err, minioMetaMultipartBucket, partSuffix)
}
// Append the part in background.
errCh := fs.append(bucket, object, uploadID, fsMeta)
go func() {
// Also receive the error so that the appendParts go-routine
// does not block on send. But the error received is ignored
// as fs.PutObjectPart() would have already returned success
// to the client.
<-errCh
partLock.Unlock()
}()
return PartInfo{
PartNumber: partID,
LastModified: fi.ModTime(),
ETag: newMD5Hex,
Size: fi.Size(),
}, nil
}
// listObjectParts - wrapper scanning through
// '.minio.sys/multipart/bucket/object/UPLOADID'. Lists all the parts
// saved inside '.minio.sys/multipart/bucket/object/UPLOADID'.
func (fs fsObjects) listObjectParts(bucket, object, uploadID string, partNumberMarker, maxParts int) (lpi ListPartsInfo, e error) {
result := ListPartsInfo{}
uploadIDPath := pathJoin(bucket, object, uploadID)
fsMetaPath := pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadIDPath, fsMetaJSONFile)
metaFile, err := fs.rwPool.Open(fsMetaPath)
if err != nil {
if err == errFileNotFound || err == errFileAccessDenied {
// On windows oddly this is returned.
return lpi, traceError(InvalidUploadID{UploadID: uploadID})
}
return lpi, toObjectErr(traceError(err), bucket, object)
}
defer fs.rwPool.Close(fsMetaPath)
fsMeta := fsMetaV1{}
_, err = fsMeta.ReadFrom(metaFile.LockedFile)
if err != nil {
return lpi, toObjectErr(err, minioMetaBucket, fsMetaPath)
}
// Only parts with higher part numbers will be listed.
partIdx := fsMeta.ObjectPartIndex(partNumberMarker)
parts := fsMeta.Parts
if partIdx != -1 {
parts = fsMeta.Parts[partIdx+1:]
}
count := maxParts
for _, part := range parts {
var fi os.FileInfo
partNamePath := pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadIDPath, part.Name)
fi, err = fsStatFile(partNamePath)
if err != nil {
return lpi, toObjectErr(err, minioMetaMultipartBucket, partNamePath)
}
result.Parts = append(result.Parts, PartInfo{
PartNumber: part.Number,
ETag: part.ETag,
LastModified: fi.ModTime(),
Size: fi.Size(),
})
count--
if count == 0 {
break
}
}
// If listed entries are more than maxParts, we set IsTruncated as true.
if len(parts) > 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
// Success.
return result, nil
}
// ListObjectParts - lists all previously uploaded parts for a given
// object and uploadID. Takes additional input of part-number-marker
// to indicate where the listing should begin from.
//
// Implements S3 compatible ListObjectParts API. The resulting
// ListPartsInfo structure is unmarshalled directly into XML and
// replied back to the client.
func (fs fsObjects) ListObjectParts(bucket, object, uploadID string, partNumberMarker, maxParts int) (lpi ListPartsInfo, e error) {
if err := checkListPartsArgs(bucket, object, fs); err != nil {
return lpi, err
}
if _, err := fs.statBucketDir(bucket); err != nil {
return lpi, toObjectErr(err, bucket)
}
// Hold the lock so that two parallel complete-multipart-uploads
// do not leave a stale uploads.json behind.
objectMPartPathLock := globalNSMutex.NewNSLock(minioMetaMultipartBucket, pathJoin(bucket, object))
objectMPartPathLock.RLock()
defer objectMPartPathLock.RUnlock()
listPartsInfo, err := fs.listObjectParts(bucket, object, uploadID, partNumberMarker, maxParts)
if err != nil {
return lpi, toObjectErr(err, bucket, object)
}
// Success.
return listPartsInfo, nil
}
// CompleteMultipartUpload - completes an ongoing multipart
// transaction after receiving all the parts indicated by the client.
// Returns an md5sum calculated by concatenating all the individual
// md5sums of all the parts.
//
// Implements S3 compatible Complete multipart API.
func (fs fsObjects) CompleteMultipartUpload(bucket string, object string, uploadID string, parts []completePart) (oi ObjectInfo, e error) {
if err := checkCompleteMultipartArgs(bucket, object, fs); err != nil {
return oi, err
}
// Check if an object is present as one of the parent dir.
if fs.parentDirIsObject(bucket, pathutil.Dir(object)) {
return oi, toObjectErr(traceError(errFileAccessDenied), bucket, object)
}
if _, err := fs.statBucketDir(bucket); err != nil {
return oi, toObjectErr(err, bucket)
}
// Calculate s3 compatible md5sum for complete multipart.
s3MD5, err := getCompleteMultipartMD5(parts)
if err != nil {
return oi, err
}
uploadIDPath := pathJoin(bucket, object, uploadID)
// Hold the lock so that two parallel complete-multipart-uploads
// do not leave a stale uploads.json behind.
objectMPartPathLock := globalNSMutex.NewNSLock(minioMetaMultipartBucket, pathJoin(bucket, object))
objectMPartPathLock.Lock()
defer objectMPartPathLock.Unlock()
fsMetaPathMultipart := pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadIDPath, fsMetaJSONFile)
rlk, err := fs.rwPool.Open(fsMetaPathMultipart)
if err != nil {
if err == errFileNotFound || err == errFileAccessDenied {
return oi, traceError(InvalidUploadID{UploadID: uploadID})
}
return oi, toObjectErr(traceError(err), bucket, object)
}
// Disallow any parallel abort or complete multipart operations.
rwlk, err := fs.rwPool.Write(pathJoin(fs.fsPath, minioMetaMultipartBucket, bucket, object, uploadsJSONFile))
if err != nil {
fs.rwPool.Close(fsMetaPathMultipart)
if err == errFileNotFound || err == errFileAccessDenied {
return oi, traceError(InvalidUploadID{UploadID: uploadID})
}
return oi, toObjectErr(traceError(err), bucket, object)
}
defer rwlk.Close()
fsMeta := fsMetaV1{}
// Read saved fs metadata for ongoing multipart.
_, err = fsMeta.ReadFrom(rlk.LockedFile)
if err != nil {
fs.rwPool.Close(fsMetaPathMultipart)
return oi, toObjectErr(err, minioMetaMultipartBucket, fsMetaPathMultipart)
}
// Wait for any competing PutObject() operation on bucket/object, since same namespace
// would be acquired for `fs.json`.
fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fsMetaJSONFile)
metaFile, err := fs.rwPool.Create(fsMetaPath)
if err != nil {
fs.rwPool.Close(fsMetaPathMultipart)
return oi, toObjectErr(traceError(err), bucket, object)
}
defer metaFile.Close()
fsNSObjPath := pathJoin(fs.fsPath, bucket, object)
// This lock is held during rename of the appended tmp file to the actual
// location so that any competing GetObject/PutObject/DeleteObject do not race.
appendFallback := true // In case background-append did not append the required parts.
if isPartsSame(fsMeta.Parts, parts) {
err = fs.complete(bucket, object, uploadID, fsMeta)
if err == nil {
appendFallback = false
fsTmpObjPath := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID, uploadID)
if err = fsRenameFile(fsTmpObjPath, fsNSObjPath); err != nil {
fs.rwPool.Close(fsMetaPathMultipart)
return oi, toObjectErr(err, minioMetaTmpBucket, uploadID)
}
}
}
if appendFallback {
// background append could not do append all the required parts, hence we do it here.
tempObj := uploadID + "-" + "part.1"
fsTmpObjPath := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID, tempObj)
// Delete the temporary object in the case of a
// failure. If PutObject succeeds, then there would be
// nothing to delete.
defer fsRemoveFile(fsTmpObjPath)
// Allocate staging buffer.
var buf = make([]byte, readSizeV1)
// Validate all parts and then commit to disk.
for i, part := range parts {
partIdx := fsMeta.ObjectPartIndex(part.PartNumber)
if partIdx == -1 {
fs.rwPool.Close(fsMetaPathMultipart)
return oi, traceError(InvalidPart{})
}
if fsMeta.Parts[partIdx].ETag != part.ETag {
fs.rwPool.Close(fsMetaPathMultipart)
return oi, traceError(InvalidPart{})
}
// All parts except the last part has to be atleast 5MB.
if (i < len(parts)-1) && !isMinAllowedPartSize(fsMeta.Parts[partIdx].Size) {
fs.rwPool.Close(fsMetaPathMultipart)
return oi, traceError(PartTooSmall{
PartNumber: part.PartNumber,
PartSize: fsMeta.Parts[partIdx].Size,
PartETag: part.ETag,
})
}
// Construct part suffix.
partSuffix := fmt.Sprintf("object%d", part.PartNumber)
multipartPartFile := pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadIDPath, partSuffix)
var reader io.ReadCloser
var offset int64
reader, _, err = fsOpenFile(multipartPartFile, offset)
if err != nil {
fs.rwPool.Close(fsMetaPathMultipart)
if err == errFileNotFound {
return oi, traceError(InvalidPart{})
}
return oi, toObjectErr(traceError(err), minioMetaMultipartBucket, partSuffix)
}
// No need to hold a lock, this is a unique file and will be only written
// to one one process per uploadID per minio process.
var wfile *os.File
wfile, err = os.OpenFile(preparePath(fsTmpObjPath), os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0666)
if err != nil {
reader.Close()
fs.rwPool.Close(fsMetaPathMultipart)
return oi, toObjectErr(traceError(err), bucket, object)
}
_, err = io.CopyBuffer(wfile, reader, buf)
if err != nil {
wfile.Close()
reader.Close()
fs.rwPool.Close(fsMetaPathMultipart)
return oi, toObjectErr(traceError(err), bucket, object)
}
wfile.Close()
reader.Close()
}
if err = fsRenameFile(fsTmpObjPath, fsNSObjPath); err != nil {
fs.rwPool.Close(fsMetaPathMultipart)
return oi, toObjectErr(err, minioMetaTmpBucket, uploadID)
}
}
// No need to save part info, since we have concatenated all parts.
fsMeta.Parts = nil
// Save additional metadata.
if len(fsMeta.Meta) == 0 {
fsMeta.Meta = make(map[string]string)
}
fsMeta.Meta["etag"] = s3MD5
// Write all the set metadata.
if _, err = fsMeta.WriteTo(metaFile); err != nil {
fs.rwPool.Close(fsMetaPathMultipart)
return oi, toObjectErr(err, bucket, object)
}
// Close lock held on bucket/object/uploadid/fs.json,
// this needs to be done for windows so that we can happily
// delete the bucket/object/uploadid
fs.rwPool.Close(fsMetaPathMultipart)
// Cleanup all the parts if everything else has been safely committed.
multipartObjectDir := pathJoin(fs.fsPath, minioMetaMultipartBucket, bucket, object)
multipartUploadIDDir := pathJoin(multipartObjectDir, uploadID)
if err = fsRemoveUploadIDPath(multipartObjectDir, multipartUploadIDDir); err != nil {
return oi, toObjectErr(err, bucket, object)
}
// Remove entry from `uploads.json`.
if err = fs.removeUploadID(bucket, object, uploadID, rwlk); err != nil {
return oi, toObjectErr(err, minioMetaMultipartBucket, pathutil.Join(bucket, object))
}
fi, err := fsStatFile(fsNSObjPath)
if err != nil {
return oi, toObjectErr(err, bucket, object)
}
// Return object info.
return fsMeta.ToObjectInfo(bucket, object, fi), nil
}
// AbortMultipartUpload - aborts an ongoing multipart operation
// signified by the input uploadID. This is an atomic operation
// doesn't require clients to initiate multiple such requests.
//
// All parts are purged from all disks and reference to the uploadID
// would be removed from the system, rollback is not possible on this
// operation.
//
// Implements S3 compatible Abort multipart API, slight difference is
// that this is an atomic idempotent operation. Subsequent calls have
// no affect and further requests to the same uploadID would not be
// honored.
func (fs fsObjects) AbortMultipartUpload(bucket, object, uploadID string) error {
if err := checkAbortMultipartArgs(bucket, object, fs); err != nil {
return err
}
if _, err := fs.statBucketDir(bucket); err != nil {
return toObjectErr(err, bucket)
}
uploadIDPath := pathJoin(bucket, object, uploadID)
// Hold the lock so that two parallel complete-multipart-uploads
// do not leave a stale uploads.json behind.
objectMPartPathLock := globalNSMutex.NewNSLock(minioMetaMultipartBucket,
pathJoin(bucket, object))
objectMPartPathLock.Lock()
defer objectMPartPathLock.Unlock()
fsMetaPath := pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadIDPath, fsMetaJSONFile)
if _, err := fs.rwPool.Open(fsMetaPath); err != nil {
if err == errFileNotFound || err == errFileAccessDenied {
return traceError(InvalidUploadID{UploadID: uploadID})
}
return toObjectErr(traceError(err), bucket, object)
}
uploadsPath := pathJoin(bucke
4E16
t, object, uploadsJSONFile)
rwlk, err := fs.rwPool.Write(pathJoin(fs.fsPath, minioMetaMultipartBucket, uploadsPath))
if err != nil {
fs.rwPool.Close(fsMetaPath)
if err == errFileNotFound || err == errFileAccessDenied {
return traceError(InvalidUploadID{UploadID: uploadID})
}
return toObjectErr(traceError(err), bucket, object)
}
defer rwlk.Close()
// Signal appendParts routine to stop waiting for new parts to arrive.
fs.abort(uploadID)
// Close lock held on bucket/object/uploadid/fs.json,
// this needs to be done for windows so that we can happily
// delete the bucket/object/uploadid
fs.rwPool.Close(fsMetaPath)
// Cleanup all uploaded parts and abort the upload.
multipartObjectDir := pathJoin(fs.fsPath, minioMetaMultipartBucket, bucket, object)
multipartUploadIDDir := pathJoin(multipartObjectDir, uploadID)
if err = fsRemoveUploadIDPath(multipartObjectDir, multipartUploadIDDir); err != nil {
return toObjectErr(err, bucket, object)
}
// Remove entry from `uploads.json`.
if err = fs.removeUploadID(bucket, object, uploadID, rwlk); err != nil {
return toObjectErr(err, bucket, object)
}
return nil
}