package filesys import ( "bazil.org/fuse" "bazil.org/fuse/fs" "context" "github.com/chrislusf/seaweedfs/weed/filer2" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "os" "path/filepath" "time" ) const blockSize = 512 var _ = fs.Node(&File{}) var _ = fs.NodeOpener(&File{}) var _ = fs.NodeFsyncer(&File{}) var _ = fs.NodeSetattrer(&File{}) type File struct { Name string dir *Dir wfs *WFS entry *filer_pb.Entry isOpen bool } func (file *File) fullpath() string { return filepath.Join(file.dir.Path, file.Name) } func (file *File) Attr(ctx context.Context, attr *fuse.Attr) error { if err := file.maybeLoadAttributes(ctx); err != nil { return err } attr.Mode = os.FileMode(file.entry.Attributes.FileMode) attr.Size = filer2.TotalSize(file.entry.Chunks) attr.Mtime = time.Unix(file.entry.Attributes.Mtime, 0) attr.Gid = file.entry.Attributes.Gid attr.Uid = file.entry.Attributes.Uid attr.Blocks = attr.Size/blockSize + 1 attr.BlockSize = uint32(file.wfs.option.ChunkSizeLimit) return nil } func (file *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) { glog.V(3).Infof("%v file open %+v", file.fullpath(), req) file.isOpen = true handle := file.wfs.AcquireHandle(file, req.Uid, req.Gid) resp.Handle = fuse.HandleID(handle.handle) glog.V(3).Infof("%v file open handle id = %d", file.fullpath(), handle.handle) return handle, nil } func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) error { if err := file.maybeLoadAttributes(ctx); err != nil { return err } if file.isOpen { return nil } glog.V(3).Infof("%v file setattr %+v, old:%+v", file.fullpath(), req, file.entry.Attributes) if req.Valid.Size() { glog.V(3).Infof("%v file setattr set size=%v", file.fullpath(), req.Size) if req.Size == 0 { // fmt.Printf("truncate %v \n", fullPath) file.entry.Chunks = nil } file.entry.Attributes.FileSize = req.Size } if req.Valid.Mode() { file.entry.Attributes.FileMode = uint32(req.Mode) } if req.Valid.Uid() { file.entry.Attributes.Uid = req.Uid } if req.Valid.Gid() { file.entry.Attributes.Gid = req.Gid } if req.Valid.Mtime() { file.entry.Attributes.Mtime = req.Mtime.Unix() } return file.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error { request := &filer_pb.UpdateEntryRequest{ Directory: file.dir.Path, Entry: file.entry, } glog.V(1).Infof("set attr file entry: %v", request) _, err := client.UpdateEntry(ctx, request) if err != nil { glog.V(0).Infof("UpdateEntry file %s/%s: %v", file.dir.Path, file.Name, err) return fuse.EIO } return nil }) } func (file *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) error { // fsync works at OS level // write the file chunks to the filerGrpcAddress glog.V(3).Infof("%s/%s fsync file %+v", file.dir.Path, file.Name, req) return nil } func (file *File) maybeLoadAttributes(ctx context.Context) error { if file.entry == nil || !file.isOpen { item := file.wfs.listDirectoryEntriesCache.Get(file.fullpath()) if item != nil && !item.Expired() { entry := item.Value().(*filer_pb.Entry) file.entry = entry // glog.V(1).Infof("file attr read cached %v attributes", file.Name) } else { err := file.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error { request := &filer_pb.LookupDirectoryEntryRequest{ Name: file.Name, Directory: file.dir.Path, } resp, err := client.LookupDirectoryEntry(ctx, request) if err != nil { glog.V(0).Infof("file attr read file %v: %v", request, err) return err } file.entry = resp.Entry glog.V(1).Infof("file attr %v %+v: %d", file.fullpath(), file.entry.Attributes, filer2.TotalSize(file.entry.Chunks)) file.wfs.listDirectoryEntriesCache.Set(file.fullpath(), file.entry, file.wfs.option.EntryCacheTtl) return nil }) if err != nil { return err } } } return nil }