package filesys import ( "context" "fmt" "mime" "path" "time" "github.com/chrislusf/seaweedfs/weed/filer2" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/gabriel-vasile/mimetype" "github.com/seaweedfs/fuse" "github.com/seaweedfs/fuse/fs" ) type FileHandle struct { // cache file has been written to dirtyPages *ContinuousDirtyPages contentType string dirtyMetadata bool handle uint64 f *File RequestId fuse.RequestID // unique ID for request NodeId fuse.NodeID // file or directory the request is about Uid uint32 // user ID of process making request Gid uint32 // group ID of process making request } func newFileHandle(file *File, uid, gid uint32) *FileHandle { return &FileHandle{ f: file, dirtyPages: newDirtyPages(file), Uid: uid, Gid: gid, } } var _ = fs.Handle(&FileHandle{}) // var _ = fs.HandleReadAller(&FileHandle{}) var _ = fs.HandleReader(&FileHandle{}) var _ = fs.HandleFlusher(&FileHandle{}) var _ = fs.HandleWriter(&FileHandle{}) var _ = fs.HandleReleaser(&FileHandle{}) func (fh *FileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error { glog.V(4).Infof("%s read fh %d: [%d,%d)", fh.f.fullpath(), fh.handle, req.Offset, req.Offset+int64(req.Size)) // this value should come from the filer instead of the old f if len(fh.f.entry.Chunks) == 0 { glog.V(1).Infof("empty fh %v/%v", fh.f.dir.Path, fh.f.Name) return nil } buff := make([]byte, req.Size) if fh.f.entryViewCache == nil { fh.f.entryViewCache = filer2.NonOverlappingVisibleIntervals(fh.f.entry.Chunks) } chunkViews := filer2.ViewFromVisibleIntervals(fh.f.entryViewCache, req.Offset, req.Size) totalRead, err := filer2.ReadIntoBuffer(ctx, fh.f.wfs, fh.f.fullpath(), buff, chunkViews, req.Offset) resp.Data = buff[:totalRead] if err != nil { glog.Errorf("file handle read %s: %v", fh.f.fullpath(), err) } return err } // Write to the file handle func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) error { // write the request to volume servers glog.V(4).Infof("%+v/%v write fh %d: [%d,%d)", fh.f.dir.Path, fh.f.Name, fh.handle, req.Offset, req.Offset+int64(len(req.Data))) chunks, err := fh.dirtyPages.AddPage(ctx, req.Offset, req.Data) if err != nil { glog.Errorf("%+v/%v write fh %d: [%d,%d): %v", fh.f.dir.Path, fh.f.Name, fh.handle, req.Offset, req.Offset+int64(len(req.Data)), err) return fmt.Errorf("write %s/%s at [%d,%d): %v", fh.f.dir.Path, fh.f.Name, req.Offset, req.Offset+int64(len(req.Data)), err) } resp.Size = len(req.Data) if req.Offset == 0 { // detect mime type var possibleExt string fh.contentType, possibleExt = mimetype.Detect(req.Data) if ext := path.Ext(fh.f.Name); ext != possibleExt { fh.contentType = mime.TypeByExtension(ext) } fh.dirtyMetadata = true } fh.f.addChunks(chunks) if len(chunks) > 0 { fh.dirtyMetadata = true } return nil } func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) error { glog.V(4).Infof("%v release fh %d", fh.f.fullpath(), fh.handle) fh.dirtyPages.releaseResource() fh.f.wfs.ReleaseHandle(fh.f.fullpath(), fuse.HandleID(fh.handle)) fh.f.isOpen = false return nil } func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error { // fflush works at fh level // send the data to the OS glog.V(4).Infof("%s fh %d flush %v", fh.f.fullpath(), fh.handle, req) chunk, err := fh.dirtyPages.FlushToStorage(ctx) if err != nil { glog.Errorf("flush %s/%s: %v", fh.f.dir.Path, fh.f.Name, err) return fmt.Errorf("flush %s/%s: %v", fh.f.dir.Path, fh.f.Name, err) } fh.f.addChunk(chunk) if !fh.dirtyMetadata { return nil } return fh.f.wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error { if fh.f.entry.Attributes != nil { fh.f.entry.Attributes.Mime = fh.contentType fh.f.entry.Attributes.Uid = req.Uid fh.f.entry.Attributes.Gid = req.Gid fh.f.entry.Attributes.Mtime = time.Now().Unix() fh.f.entry.Attributes.Crtime = time.Now().Unix() fh.f.entry.Attributes.FileMode = uint32(0777 &^ fh.f.wfs.option.Umask) } request := &filer_pb.CreateEntryRequest{ Directory: fh.f.dir.Path, Entry: fh.f.entry, } glog.V(3).Infof("%s/%s set chunks: %v", fh.f.dir.Path, fh.f.Name, len(fh.f.entry.Chunks)) for i, chunk := range fh.f.entry.Chunks { glog.V(3).Infof("%s/%s chunks %d: %v [%d,%d)", fh.f.dir.Path, fh.f.Name, i, chunk.FileId, chunk.Offset, chunk.Offset+int64(chunk.Size)) } chunks, garbages := filer2.CompactFileChunks(fh.f.entry.Chunks) fh.f.entry.Chunks = chunks // fh.f.entryViewCache = nil if _, err := client.CreateEntry(ctx, request); err != nil { glog.Errorf("update fh: %v", err) return fmt.Errorf("update fh: %v", err) } fh.f.wfs.deleteFileChunks(ctx, garbages) for i, chunk := range garbages { glog.V(3).Infof("garbage %s/%s chunks %d: %v [%d,%d)", fh.f.dir.Path, fh.f.Name, i, chunk.FileId, chunk.Offset, chunk.Offset+int64(chunk.Size)) } return nil }) }