package filesys import ( "context" "io" "os" "sort" "sync" "time" "github.com/seaweedfs/fuse" "github.com/seaweedfs/fuse/fs" "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" ) const blockSize = 512 var _ = fs.Node(&File{}) var _ = fs.NodeOpener(&File{}) var _ = fs.NodeFsyncer(&File{}) var _ = fs.NodeSetattrer(&File{}) var _ = fs.NodeGetxattrer(&File{}) var _ = fs.NodeSetxattrer(&File{}) var _ = fs.NodeRemovexattrer(&File{}) var _ = fs.NodeListxattrer(&File{}) var _ = fs.NodeForgetter(&File{}) type File struct { Name string dir *Dir wfs *WFS entry *filer_pb.Entry entryLock sync.RWMutex entryViewCache []filer.VisibleInterval isOpen int reader io.ReaderAt dirtyMetadata bool } func (file *File) fullpath() util.FullPath { return util.NewFullPath(file.dir.FullPath(), file.Name) } func (file *File) Attr(ctx context.Context, attr *fuse.Attr) (err error) { glog.V(4).Infof("file Attr %s, open:%v existing:%v", file.fullpath(), file.isOpen, attr) entry := file.getEntry() if file.isOpen <= 0 || entry == nil { if entry, err = file.maybeLoadEntry(ctx); err != nil { return err } } if entry == nil { return fuse.ENOENT } // attr.Inode = file.fullpath().AsInode() attr.Valid = time.Second attr.Mode = os.FileMode(entry.Attributes.FileMode) attr.Size = filer.FileSize(entry) if file.isOpen > 0 { attr.Size = entry.Attributes.FileSize glog.V(4).Infof("file Attr %s, open:%v, size: %d", file.fullpath(), file.isOpen, attr.Size) } attr.Crtime = time.Unix(entry.Attributes.Crtime, 0) attr.Mtime = time.Unix(entry.Attributes.Mtime, 0) attr.Gid = entry.Attributes.Gid attr.Uid = entry.Attributes.Uid attr.Blocks = attr.Size/blockSize + 1 attr.BlockSize = uint32(file.wfs.option.ChunkSizeLimit) if entry.HardLinkCounter > 0 { attr.Nlink = uint32(entry.HardLinkCounter) } return nil } func (file *File) Getxattr(ctx context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error { glog.V(4).Infof("file Getxattr %s", file.fullpath()) entry, err := file.maybeLoadEntry(ctx) if err != nil { return err } return getxattr(entry, req, resp) } func (file *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) { glog.V(4).Infof("file %v open %+v", file.fullpath(), req) handle := file.wfs.AcquireHandle(file, req.Uid, req.Gid) resp.Handle = fuse.HandleID(handle.handle) glog.V(4).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 { glog.V(4).Infof("%v file setattr %+v", file.fullpath(), req) entry, err := file.maybeLoadEntry(ctx) if err != nil { return err } if file.isOpen > 0 { file.wfs.handlesLock.Lock() fileHandle := file.wfs.handles[file.fullpath().AsInode()] file.wfs.handlesLock.Unlock() if fileHandle != nil { fileHandle.Lock() defer fileHandle.Unlock() } } if req.Valid.Size() { glog.V(4).Infof("%v file setattr set size=%v chunks=%d", file.fullpath(), req.Size, len(entry.Chunks)) if req.Size < filer.FileSize(entry) { // fmt.Printf("truncate %v \n", fullPath) var chunks []*filer_pb.FileChunk var truncatedChunks []*filer_pb.FileChunk for _, chunk := range entry.Chunks { int64Size := int64(chunk.Size) if chunk.Offset+int64Size > int64(req.Size) { // this chunk is truncated int64Size = int64(req.Size) - chunk.Offset if int64Size > 0 { chunks = append(chunks, chunk) glog.V(4).Infof("truncated chunk %+v from %d to %d\n", chunk.GetFileIdString(), chunk.Size, int64Size) chunk.Size = uint64(int64Size) } else { glog.V(4).Infof("truncated whole chunk %+v\n", chunk.GetFileIdString()) truncatedChunks = append(truncatedChunks, chunk) } } } entry.Chunks = chunks file.entryViewCache, _ = filer.NonOverlappingVisibleIntervals(file.wfs.LookupFn(), chunks) file.reader = nil } entry.Attributes.FileSize = req.Size file.dirtyMetadata = true } if req.Valid.Mode() { entry.Attributes.FileMode = uint32(req.Mode) file.dirtyMetadata = true } if req.Valid.Uid() { entry.Attributes.Uid = req.Uid file.dirtyMetadata = true } if req.Valid.Gid() { entry.Attributes.Gid = req.Gid file.dirtyMetadata = true } if req.Valid.Crtime() { entry.Attributes.Crtime = req.Crtime.Unix() file.dirtyMetadata = true } if req.Valid.Mtime() { entry.Attributes.Mtime = req.Mtime.Unix() file.dirtyMetadata = true } if req.Valid.Handle() { // fmt.Printf("file handle => %d\n", req.Handle) } if file.isOpen > 0 { return nil } if !file.dirtyMetadata { return nil } return file.saveEntry(entry) } func (file *File) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) error { glog.V(4).Infof("file Setxattr %s: %s", file.fullpath(), req.Name) entry, err := file.maybeLoadEntry(ctx) if err != nil { return err } if err := setxattr(entry, req); err != nil { return err } return file.saveEntry(entry) } func (file *File) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest) error { glog.V(4).Infof("file Removexattr %s: %s", file.fullpath(), req.Name) entry, err := file.maybeLoadEntry(ctx) if err != nil { return err } if err := removexattr(entry, req); err != nil { return err } return file.saveEntry(entry) } func (file *File) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error { glog.V(4).Infof("file Listxattr %s", file.fullpath()) entry, err := file.maybeLoadEntry(ctx) if err != nil { return err } if err := listxattr(entry, req, resp); err != nil { return err } 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(4).Infof("%s/%s fsync file %+v", file.dir.FullPath(), file.Name, req) return nil } func (file *File) Forget() { t := util.NewFullPath(file.dir.FullPath(), file.Name) glog.V(4).Infof("Forget file %s", t) file.wfs.fsNodeCache.DeleteFsNode(t) } func (file *File) maybeLoadEntry(ctx context.Context) (entry *filer_pb.Entry, err error) { entry = file.getEntry() if file.isOpen > 0 { return entry, nil } if entry != nil { if len(entry.HardLinkId) == 0 { // only always reload hard link return entry, nil } } entry, err = file.wfs.maybeLoadEntry(file.dir.FullPath(), file.Name) if err != nil { glog.V(3).Infof("maybeLoadEntry file %s/%s: %v", file.dir.FullPath(), file.Name, err) return entry, err } if entry != nil { file.setEntry(entry) } else { glog.Warningf("maybeLoadEntry not found entry %s/%s: %v", file.dir.FullPath(), file.Name, err) } return entry, nil } func lessThan(a, b *filer_pb.FileChunk) bool { if a.Mtime == b.Mtime { return a.Fid.FileKey < b.Fid.FileKey } return a.Mtime < b.Mtime } func (file *File) addChunks(chunks []*filer_pb.FileChunk) { // find the earliest incoming chunk newChunks := chunks earliestChunk := newChunks[0] for i := 1; i < len(newChunks); i++ { if lessThan(earliestChunk, newChunks[i]) { earliestChunk = newChunks[i] } } entry := file.getEntry() if entry == nil { return } // pick out-of-order chunks from existing chunks for _, chunk := range entry.Chunks { if lessThan(earliestChunk, chunk) { chunks = append(chunks, chunk) } } // sort incoming chunks sort.Slice(chunks, func(i, j int) bool { return lessThan(chunks[i], chunks[j]) }) // add to entry view cache for _, chunk := range chunks { file.entryViewCache = filer.MergeIntoVisibles(file.entryViewCache, chunk) } file.reader = nil glog.V(4).Infof("%s existing %d chunks adds %d more", file.fullpath(), len(entry.Chunks), len(chunks)) entry.Chunks = append(entry.Chunks, newChunks...) } func (file *File) setEntry(entry *filer_pb.Entry) { file.entryLock.Lock() defer file.entryLock.Unlock() file.entry = entry file.entryViewCache, _ = filer.NonOverlappingVisibleIntervals(file.wfs.LookupFn(), entry.Chunks) file.reader = nil } func (file *File) clearEntry() { file.entryLock.Lock() defer file.entryLock.Unlock() file.entry = nil file.entryViewCache = nil file.reader = nil } func (file *File) saveEntry(entry *filer_pb.Entry) error { return file.wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error { file.wfs.mapPbIdFromLocalToFiler(entry) defer file.wfs.mapPbIdFromFilerToLocal(entry) request := &filer_pb.UpdateEntryRequest{ Directory: file.dir.FullPath(), Entry: entry, Signatures: []int32{file.wfs.signature}, } glog.V(4).Infof("save file entry: %v", request) _, err := client.UpdateEntry(context.Background(), request) if err != nil { glog.Errorf("UpdateEntry file %s/%s: %v", file.dir.FullPath(), file.Name, err) return fuse.EIO } file.wfs.metaCache.UpdateEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry)) return nil }) } func (file *File) getEntry() *filer_pb.Entry { file.entryLock.RLock() defer file.entryLock.RUnlock() return file.entry }