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Fix list-incomplete uploads for XL.

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master
Krishna Srinivas 9 years ago committed by Harshavardhana
parent 34e9ad24aa
commit b1e2b7dea2
3 changed files with 166 additions and 136 deletions
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  1. 43
      tree-walk-xl.go
  2. 19
      xl-v1-list-objects.go
  3. 240
      xl-v1-multipart-common.go

43
tree-walk-xl.go
Unescape View File

@ -18,7 +18,6 @@ package main
import (
"math/rand"
"path"
"sort"
"strings"
"time"
@ -34,9 +33,9 @@ type listParams struct {
// Tree walk result carries results of tree walking.
type treeWalkResult struct {
objInfo ObjectInfo
err error
end bool
entry string
err error
end bool
}
// Tree walk notify carries a channel which notifies tree walk
@ -48,7 +47,7 @@ type treeWalker struct {
}
// listDir - listDir.
func (xl xlObjects) listDir(bucket, prefixDir string, filter func(entry string) bool) (entries []string, err error) {
func (xl xlObjects) listDir(bucket, prefixDir string, filter func(entry string) bool, isLeaf func(string, string) bool) (entries []string, err error) {
// Count for list errors encountered.
var listErrCount = 0
@ -62,7 +61,7 @@ func (xl xlObjects) listDir(bucket, prefixDir string, filter func(entry string)
entries[i] = ""
continue
}
if strings.HasSuffix(entry, slashSeparator) && xl.isObject(bucket, path.Join(prefixDir, entry)) {
if strings.HasSuffix(entry, slashSeparator) && isLeaf(bucket, pathJoin(prefixDir, entry)) {
entries[i] = strings.TrimSuffix(entry, slashSeparator)
}
}
@ -90,25 +89,11 @@ func (xl xlObjects) getRandomDisk() (disk StorageAPI) {
}
// treeWalkXL walks directory tree recursively pushing fileInfo into the channel as and when it encounters files.
func (xl xlObjects) treeWalkXL(bucket, prefixDir, entryPrefixMatch, marker string, recursive bool, send func(treeWalkResult) bool, count *int) bool {
func (xl xlObjects) treeWalkXL(bucket, prefixDir, entryPrefixMatch, marker string, recursive bool, send func(treeWalkResult) bool, count *int, isLeaf func(string, string) bool) bool {
// Example:
// if prefixDir="one/two/three/" and marker="four/five.txt" treeWalk is recursively
// called with prefixDir="one/two/three/four/" and marker="five.txt"
// Convert entry to FileInfo
entryToObjectInfo := func(entry string) (objInfo ObjectInfo, err error) {
if strings.HasSuffix(entry, slashSeparator) {
// Object name needs to be full path.
objInfo.Bucket = bucket
objInfo.Name = path.Join(prefixDir, entry)
objInfo.Name += slashSeparator
objInfo.IsDir = true
return objInfo, nil
}
// Set the Mode to a "regular" file.
return xl.getObjectInfo(bucket, path.Join(prefixDir, entry))
}
var markerBase, markerDir string
if marker != "" {
// Ex: if marker="four/five.txt", markerDir="four/" markerBase="five.txt"
@ -121,7 +106,7 @@ func (xl xlObjects) treeWalkXL(bucket, prefixDir, entryPrefixMatch, marker strin
}
entries, err := xl.listDir(bucket, prefixDir, func(entry string) bool {
return !strings.HasPrefix(entry, entryPrefixMatch)
})
}, isLeaf)
if err != nil {
send(treeWalkResult{err: err})
return false
@ -166,19 +151,13 @@ func (xl xlObjects) treeWalkXL(bucket, prefixDir, entryPrefixMatch, marker strin
}
*count--
prefixMatch := "" // Valid only for first level treeWalk and empty for subdirectories.
if !xl.treeWalkXL(bucket, path.Join(prefixDir, entry), prefixMatch, markerArg, recursive, send, count) {
if !xl.treeWalkXL(bucket, pathJoin(prefixDir, entry), prefixMatch, markerArg, recursive, send, count, isLeaf) {
return false
}
continue
}
*count--
objInfo, err := entryToObjectInfo(entry)
if err != nil {
// The file got deleted in the interim between ListDir() and StatFile()
// Ignore error and continue.
continue
}
if !send(treeWalkResult{objInfo: objInfo}) {
if !send(treeWalkResult{entry: pathJoin(prefixDir, entry)}) {
return false
}
}
@ -186,7 +165,7 @@ func (xl xlObjects) treeWalkXL(bucket, prefixDir, entryPrefixMatch, marker strin
}
// Initiate a new treeWalk in a goroutine.
func (xl xlObjects) startTreeWalkXL(bucket, prefix, marker string, recursive bool) *treeWalker {
func (xl xlObjects) startTreeWalkXL(bucket, prefix, marker string, recursive bool, isLeaf func(string, string) bool) *treeWalker {
// Example 1
// If prefix is "one/two/three/" and marker is "one/two/three/four/five.txt"
// treeWalk is called with prefixDir="one/two/three/" and marker="four/five.txt"
@ -223,7 +202,7 @@ func (xl xlObjects) startTreeWalkXL(bucket, prefix, marker string, recursive boo
return false
}
}
xl.treeWalkXL(bucket, prefixDir, entryPrefixMatch, marker, recursive, send, &count)
xl.treeWalkXL(bucket, prefixDir, entryPrefixMatch, marker, recursive, send, &count, isLeaf)
}()
return &walkNotify
}

19
xl-v1-list-objects.go
Unescape View File

@ -11,7 +11,7 @@ func (xl xlObjects) listObjectsXL(bucket, prefix, marker, delimiter string, maxK
walker := xl.lookupTreeWalkXL(listParams{bucket, recursive, marker, prefix})
if walker == nil {
walker = xl.startTreeWalkXL(bucket, prefix, marker, recursive)
walker = xl.startTreeWalkXL(bucket, prefix, marker, recursive, xl.isObject)
}
var objInfos []ObjectInfo
var eof bool
@ -31,7 +31,22 @@ func (xl xlObjects) listObjectsXL(bucket, prefix, marker, delimiter string, maxK
}
return ListObjectsInfo{}, toObjectErr(walkResult.err, bucket, prefix)
}
objInfo := walkResult.objInfo
entry := walkResult.entry
var objInfo ObjectInfo
if strings.HasSuffix(entry, slashSeparator) {
// Object name needs to be full path.
objInfo.Bucket = bucket
objInfo.Name = entry
objInfo.IsDir = true
} else {
// Set the Mode to a "regular" file.
var err error
objInfo, err = xl.getObjectInfo(bucket, entry)
if err != nil {
return ListObjectsInfo{}, toObjectErr(err, bucket, prefix)
}
}
nextMarker = objInfo.Name
objInfos = append(objInfos, objInfo)
if walkResult.end {

240
xl-v1-multipart-common.go
Unescape View File

@ -48,7 +48,7 @@ type byInitiatedTime []uploadInfo
func (t byInitiatedTime) Len() int { return len(t) }
func (t byInitiatedTime) Swap(i, j int) { t[i], t[j] = t[j], t[i] }
func (t byInitiatedTime) Less(i, j int) bool {
return t[i].Initiated.After(t[j].Initiated)
return t[i].Initiated.Before(t[j].Initiated)
}
// AddUploadID - adds a new upload id in order of its initiated time.
@ -257,6 +257,49 @@ func cleanupUploadedParts(bucket, object, uploadID string, storageDisks ...Stora
return nil
}
// Returns if the prefix is a multipart upload.
func (xl xlObjects) isMultipartUpload(bucket, prefix string) bool {
// Create errs and volInfo slices of storageDisks size.
var errs = make([]error, len(xl.storageDisks))
// Allocate a new waitgroup.
var wg = &sync.WaitGroup{}
for index, disk := range xl.storageDisks {
wg.Add(1)
// Stat file on all the disks in a routine.
go func(index int, disk StorageAPI) {
defer wg.Done()
_, err := disk.StatFile(bucket, path.Join(prefix, uploadsJSONFile))
if err != nil {
errs[index] = err
return
}
errs[index] = nil
}(index, disk)
}
// Wait for all the Stat operations to finish.
wg.Wait()
var errFileNotFoundCount int
for _, err := range errs {
if err != nil {
if err == errFileNotFound {
errFileNotFoundCount++
// If we have errors with file not found greater than allowed read
// quorum we return err as errFileNotFound.
if errFileNotFoundCount > len(xl.storageDisks)-xl.readQuorum {
return false
}
continue
}
errorIf(err, "Unable to access file "+path.Join(bucket, prefix))
return false
}
}
return true
}
// listUploadsInfo - list all uploads info.
func (xl xlObjects) listUploadsInfo(prefixPath string) (uploads []uploadInfo, err error) {
disk := xl.getRandomDisk() // Choose a random disk on each attempt.
@ -272,95 +315,37 @@ func (xl xlObjects) listUploadsInfo(prefixPath string) (uploads []uploadInfo, er
return uploads, nil
}
// listMetaBucketMultipart - list all objects at a given prefix inside minioMetaBucket.
func (xl xlObjects) listMetaBucketMultipart(prefixPath string, markerPath string, recursive bool, maxKeys int) (objInfos []ObjectInfo, eof bool, err error) {
walker := xl.lookupTreeWalkXL(listParams{minioMetaBucket, recursive, markerPath, prefixPath})
if walker == nil {
walker = xl.startTreeWalkXL(minioMetaBucket, prefixPath, markerPath, recursive)
func (xl xlObjects) listMultipartUploadIDs(bucketName, objectName, uploadIDMarker string, count int) ([]uploadMetadata, bool, error) {
var uploads []uploadMetadata
uploadsJSONContent, err := getUploadIDs(bucketName, objectName, xl.getRandomDisk())
if err != nil {
return nil, false, err
}
// newMaxKeys tracks the size of entries which are going to be
// returned back.
var newMaxKeys int
// Following loop gathers and filters out special files inside minio meta volume.
for {
walkResult, ok := <-walker.ch
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 walkResult.err == errFileNotFound || walkResult.err == errDiskNotFound {
return nil, true, nil
}
return nil, false, toObjectErr(walkResult.err, minioMetaBucket, prefixPath)
}
objInfo := walkResult.objInfo
var uploads []uploadInfo
if objInfo.IsDir {
// List all the entries if fi.Name is a leaf directory, if
// fi.Name is not a leaf directory then the resulting
// entries are empty.
uploads, err = xl.listUploadsInfo(objInfo.Name)
if err != nil {
return nil, false, err
}
}
if len(uploads) > 0 {
for _, upload := range uploads {
objInfos = append(objInfos, ObjectInfo{
Name: path.Join(objInfo.Name, upload.UploadID),
ModTime: upload.Initiated,
})
newMaxKeys++
// If we have reached the maxKeys, it means we have listed
// everything that was requested.
if newMaxKeys == maxKeys {
break
}
}
} else {
// We reach here for a non-recursive case non-leaf entry
// OR recursive case with fi.Name.
if !objInfo.IsDir { // Do not skip non-recursive case directory entries.
// Validate if 'fi.Name' is incomplete multipart.
if !strings.HasSuffix(objInfo.Name, xlMetaJSONFile) {
continue
}
objInfo.Name = path.Dir(objInfo.Name)
}
objInfos = append(objInfos, objInfo)
newMaxKeys++
// If we have reached the maxKeys, it means we have listed
// everything that was requested.
if newMaxKeys == maxKeys {
index := 0
if uploadIDMarker != "" {
for ; index < len(uploadsJSONContent.Uploads); index++ {
if uploadsJSONContent.Uploads[index].UploadID == uploadIDMarker {
// Skip the uploadID as it would already be listed in previous listing.
index++
break
}
}
}
if !eof && len(objInfos) != 0 {
// EOF has not reached, hence save the walker channel to the map so that the walker go routine
// can continue from where it left off for the next list request.
lastObjInfo := objInfos[len(objInfos)-1]
markerPath = lastObjInfo.Name
xl.saveTreeWalkXL(listParams{minioMetaBucket, recursive, markerPath, prefixPath}, walker)
for index < len(uploadsJSONContent.Uploads) {
uploads = append(uploads, uploadMetadata{
Object: objectName,
UploadID: uploadsJSONContent.Uploads[index].UploadID,
Initiated: uploadsJSONContent.Uploads[index].Initiated,
})
count--
index++
if count == 0 {
break
}
}
// Return entries here.
return objInfos, eof, nil
return uploads, index == len(uploadsJSONContent.Uploads), nil
}
// FIXME: Currently the code sorts based on keyName/upload-id which is
// not correct based on the S3 specs. According to s3 specs we are
// supposed to only lexically sort keyNames and then for keyNames with
// multiple upload ids should be sorted based on the initiated time.
// Currently this case is not handled.
// listMultipartUploadsCommon - lists all multipart uploads, common
// function for both object layers.
func (xl xlObjects) listMultipartUploadsCommon(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (ListMultipartsInfo, error) {
@ -413,9 +398,12 @@ func (xl xlObjects) listMultipartUploadsCommon(bucket, prefix, keyMarker, upload
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(mpartMetaPrefix, pathJoin(bucket, prefix))
multipartPrefixPath := pathJoin(mpartMetaPrefix, bucket, prefix)
if prefix == "" {
// Should have a trailing "/" if prefix is ""
// For ex. multipartPrefixPath should be "multipart/bucket/" if prefix is ""
@ -423,33 +411,81 @@ func (xl xlObjects) listMultipartUploadsCommon(bucket, prefix, keyMarker, upload
}
multipartMarkerPath := ""
if keyMarker != "" {
keyMarkerPath := pathJoin(pathJoin(bucket, keyMarker), uploadIDMarker)
multipartMarkerPath = pathJoin(mpartMetaPrefix, keyMarkerPath)
multipartMarkerPath = pathJoin(mpartMetaPrefix, bucket, keyMarker)
}
// List all the multipart files at prefixPath, starting with marker keyMarkerPath.
objInfos, eof, err := xl.listMetaBucketMultipart(multipartPrefixPath, multipartMarkerPath, recursive, maxUploads)
if err != nil {
return ListMultipartsInfo{}, err
var uploads []uploadMetadata
var err error
var eof bool
if uploadIDMarker != "" {
uploads, _, err = xl.listMultipartUploadIDs(bucket, keyMarker, uploadIDMarker, maxUploads)
if err != nil {
return ListMultipartsInfo{}, err
}
maxUploads = maxUploads - len(uploads)
}
// Loop through all the received files fill in the multiparts result.
for _, objInfo := range objInfos {
if maxUploads > 0 {
walker := xl.lookupTreeWalkXL(listParams{minioMetaBucket, recursive, multipartMarkerPath, multipartPrefixPath})
if walker == nil {
walker = xl.startTreeWalkXL(minioMetaBucket, multipartPrefixPath, multipartMarkerPath, recursive, xl.isMultipartUpload)
}
for maxUploads > 0 {
walkResult, ok := <-walker.ch
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 walkResult.err == errFileNotFound || walkResult.err == errDiskNotFound {
eof = true
break
}
return ListMultipartsInfo{}, err
}
entry := strings.TrimPrefix(walkResult.entry, retainSlash(pathJoin(mpartMetaPrefix, bucket)))
if strings.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 = xl.listMultipartUploadIDs(bucket, entry, uploadIDMarker, maxUploads)
if err != nil {
return ListMultipartsInfo{}, 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 objInfo.IsDir {
if strings.HasSuffix(upload.Object, slashSeparator) {
// All directory entries are common prefixes.
uploadID = "" // Upload ids are empty for CommonPrefixes.
objectName = strings.TrimPrefix(objInfo.Name, retainSlash(pathJoin(mpartMetaPrefix, bucket)))
objectName = upload.Object
result.CommonPrefixes = append(result.CommonPrefixes, objectName)
} else {
uploadID = path.Base(objInfo.Name)
objectName = strings.TrimPrefix(path.Dir(objInfo.Name), retainSlash(pathJoin(mpartMetaPrefix, bucket)))
result.Uploads = append(result.Uploads, uploadMetadata{
Object: objectName,
UploadID: uploadID,
Initiated: objInfo.ModTime,
})
uploadID = upload.UploadID
objectName = upload.Object
result.Uploads = append(result.Uploads, upload)
}
result.NextKeyMarker = objectName
result.NextUploadIDMarker = uploadID

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