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package weed_server
import ( "context" "fmt" "path/filepath" "time"
"github.com/chrislusf/seaweedfs/weed/filer" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/util" )
func (fs *FilerServer) AtomicRenameEntry(ctx context.Context, req *filer_pb.AtomicRenameEntryRequest) (*filer_pb.AtomicRenameEntryResponse, error) {
glog.V(1).Infof("AtomicRenameEntry %v", req)
oldParent := util.FullPath(filepath.ToSlash(req.OldDirectory)) newParent := util.FullPath(filepath.ToSlash(req.NewDirectory))
if err := fs.filer.CanRename(oldParent, newParent); err != nil { return nil, err }
ctx, err := fs.filer.BeginTransaction(ctx) if err != nil { return nil, err }
oldEntry, err := fs.filer.FindEntry(ctx, oldParent.Child(req.OldName)) if err != nil { fs.filer.RollbackTransaction(ctx) return nil, fmt.Errorf("%s/%s not found: %v", req.OldDirectory, req.OldName, err) }
moveErr := fs.moveEntry(ctx, nil, oldParent, oldEntry, newParent, req.NewName, req.Signatures) if moveErr != nil { fs.filer.RollbackTransaction(ctx) return nil, fmt.Errorf("%s/%s move error: %v", req.OldDirectory, req.OldName, moveErr) } else { if commitError := fs.filer.CommitTransaction(ctx); commitError != nil { fs.filer.RollbackTransaction(ctx) return nil, fmt.Errorf("%s/%s move commit error: %v", req.OldDirectory, req.OldName, commitError) } }
return &filer_pb.AtomicRenameEntryResponse{}, nil }
func (fs *FilerServer) StreamRenameEntry(req *filer_pb.StreamRenameEntryRequest, stream filer_pb.SeaweedFiler_StreamRenameEntryServer) (err error) {
glog.V(1).Infof("StreamRenameEntry %v", req)
oldParent := util.FullPath(filepath.ToSlash(req.OldDirectory)) newParent := util.FullPath(filepath.ToSlash(req.NewDirectory))
if err := fs.filer.CanRename(oldParent, newParent); err != nil { return err }
ctx := context.Background()
ctx, err = fs.filer.BeginTransaction(ctx) if err != nil { return err }
oldEntry, err := fs.filer.FindEntry(ctx, oldParent.Child(req.OldName)) if err != nil { fs.filer.RollbackTransaction(ctx) return fmt.Errorf("%s/%s not found: %v", req.OldDirectory, req.OldName, err) }
if oldEntry.IsDirectory() { // follow https://pubs.opengroup.org/onlinepubs/000095399/functions/rename.html
targetDir := newParent.Child(req.NewName) newEntry, err := fs.filer.FindEntry(ctx, targetDir) if err == nil { if !newEntry.IsDirectory() { fs.filer.RollbackTransaction(ctx) return fmt.Errorf("%s is not directory", targetDir) } if entries, _, _ := fs.filer.ListDirectoryEntries(context.Background(), targetDir, "", false, 1, "", "", ""); len(entries) > 0 { return fmt.Errorf("%s is not empty", targetDir) } } }
moveErr := fs.moveEntry(ctx, stream, oldParent, oldEntry, newParent, req.NewName, req.Signatures) if moveErr != nil { fs.filer.RollbackTransaction(ctx) return fmt.Errorf("%s/%s move error: %v", req.OldDirectory, req.OldName, moveErr) } else { if commitError := fs.filer.CommitTransaction(ctx); commitError != nil { fs.filer.RollbackTransaction(ctx) return fmt.Errorf("%s/%s move commit error: %v", req.OldDirectory, req.OldName, commitError) } }
return nil }
func (fs *FilerServer) moveEntry(ctx context.Context, stream filer_pb.SeaweedFiler_StreamRenameEntryServer, oldParent util.FullPath, entry *filer.Entry, newParent util.FullPath, newName string, signatures []int32) error {
if err := fs.moveSelfEntry(ctx, stream, oldParent, entry, newParent, newName, func() error { if entry.IsDirectory() { if err := fs.moveFolderSubEntries(ctx, stream, oldParent, entry, newParent, newName, signatures); err != nil { return err } } return nil }, signatures); err != nil { return fmt.Errorf("fail to move %s => %s: %v", oldParent.Child(entry.Name()), newParent.Child(newName), err) }
return nil }
func (fs *FilerServer) moveFolderSubEntries(ctx context.Context, stream filer_pb.SeaweedFiler_StreamRenameEntryServer, oldParent util.FullPath, entry *filer.Entry, newParent util.FullPath, newName string, signatures []int32) error {
currentDirPath := oldParent.Child(entry.Name()) newDirPath := newParent.Child(newName)
glog.V(1).Infof("moving folder %s => %s", currentDirPath, newDirPath)
lastFileName := "" includeLastFile := false for {
entries, hasMore, err := fs.filer.ListDirectoryEntries(ctx, currentDirPath, lastFileName, includeLastFile, 1024, "", "", "") if err != nil { return err }
// println("found", len(entries), "entries under", currentDirPath)
for _, item := range entries { lastFileName = item.Name() // println("processing", lastFileName)
err := fs.moveEntry(ctx, stream, currentDirPath, item, newDirPath, item.Name(), signatures) if err != nil { return err } } if !hasMore { break } } return nil }
func (fs *FilerServer) moveSelfEntry(ctx context.Context, stream filer_pb.SeaweedFiler_StreamRenameEntryServer, oldParent util.FullPath, entry *filer.Entry, newParent util.FullPath, newName string, moveFolderSubEntries func() error, signatures []int32) error {
oldPath, newPath := oldParent.Child(entry.Name()), newParent.Child(newName)
glog.V(1).Infof("moving entry %s => %s", oldPath, newPath)
if oldPath == newPath { glog.V(1).Infof("skip moving entry %s => %s", oldPath, newPath) return nil }
// add to new directory
newEntry := &filer.Entry{ FullPath: newPath, Attr: entry.Attr, Chunks: entry.Chunks, Extended: entry.Extended, Content: entry.Content, } if createErr := fs.filer.CreateEntry(ctx, newEntry, false, false, signatures); createErr != nil { return createErr } if stream != nil { if err := stream.Send(&filer_pb.StreamRenameEntryResponse{ Directory: string(oldParent), EventNotification: &filer_pb.EventNotification{ OldEntry: &filer_pb.Entry{ Name: entry.Name(), }, NewEntry: newEntry.ToProtoEntry(), DeleteChunks: false, NewParentPath: string(newParent), IsFromOtherCluster: false, Signatures: nil, }, TsNs: time.Now().UnixNano(), }); err != nil { return err } }
if moveFolderSubEntries != nil { if moveChildrenErr := moveFolderSubEntries(); moveChildrenErr != nil { return moveChildrenErr } }
// delete old entry
deleteErr := fs.filer.DeleteEntryMetaAndData(ctx, oldPath, false, false, false, false, signatures) if deleteErr != nil { return deleteErr } if stream != nil { if err := stream.Send(&filer_pb.StreamRenameEntryResponse{ Directory: string(oldParent), EventNotification: &filer_pb.EventNotification{ OldEntry: &filer_pb.Entry{ Name: entry.Name(), }, NewEntry: nil, DeleteChunks: false, NewParentPath: "", IsFromOtherCluster: false, Signatures: nil, }, TsNs: time.Now().UnixNano(), }); err != nil { return err } }
return nil
}
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