package weed_server import ( "context" "fmt" "path/filepath" "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) ctx, err := fs.filer.BeginTransaction(ctx) if err != nil { return nil, err } oldParent := util.FullPath(filepath.ToSlash(req.OldDirectory)) 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) } var events MoveEvents moveErr := fs.moveEntry(ctx, oldParent, oldEntry, util.FullPath(filepath.ToSlash(req.NewDirectory)), req.NewName, &events) 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) moveEntry(ctx context.Context, oldParent util.FullPath, entry *filer.Entry, newParent util.FullPath, newName string, events *MoveEvents) error { if err := fs.moveSelfEntry(ctx, oldParent, entry, newParent, newName, events, func() error { if entry.IsDirectory() { if err := fs.moveFolderSubEntries(ctx, oldParent, entry, newParent, newName, events); err != nil { return err } } return nil }); 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, oldParent util.FullPath, entry *filer.Entry, newParent util.FullPath, newName string, events *MoveEvents) 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, 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, currentDirPath, item, newDirPath, item.Name(), events) if err != nil { return err } } if len(entries) < 1024 { break } } return nil } func (fs *FilerServer) moveSelfEntry(ctx context.Context, oldParent util.FullPath, entry *filer.Entry, newParent util.FullPath, newName string, events *MoveEvents, moveFolderSubEntries func() error) 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, } createErr := fs.filer.CreateEntry(ctx, newEntry, false, false, nil) if createErr != nil { return createErr } events.newEntries = append(events.newEntries, newEntry) if moveFolderSubEntries != nil { if moveChildrenErr := moveFolderSubEntries(); moveChildrenErr != nil { return moveChildrenErr } } // delete old entry deleteErr := fs.filer.DeleteEntryMetaAndData(ctx, oldPath, false, false, false, false, nil) if deleteErr != nil { return deleteErr } events.oldEntries = append(events.oldEntries, entry) return nil } type MoveEvents struct { oldEntries []*filer.Entry newEntries []*filer.Entry }