mount: file handle locks entry better

related to https://github.com/chrislusf/seaweedfs/issues/2952

weed/mount/dirty_pages_chunked.go

@@ -84,7 +84,7 @@ func (pages *ChunkedDirtyPages) saveChunkedFileIntevalToStorage(reader io.Reader
 	}
 	chunk.Mtime = mtime
 	pages.collection, pages.replication = collection, replication
-	pages.fh.addChunks([]*filer_pb.FileChunk{chunk})
+	pages.fh.AddChunks([]*filer_pb.FileChunk{chunk})
 	pages.fh.entryViewCache = nil
 	glog.V(3).Infof("%v saveToStorage %s [%d,%d)", fileFullPath, chunk.FileId, offset, offset+size)
 

weed/mount/filehandle.go

@@ -16,7 +16,7 @@ type FileHandle struct {
 	fh        FileHandleId
 	counter   int64
 	entry     *filer_pb.Entry
-	chunkAddLock sync.Mutex
+	entryLock sync.Mutex
 	inode     uint64
 	wfs       *WFS
 
@@ -53,7 +53,20 @@ func (fh *FileHandle) FullPath() util.FullPath {
 	return fp
 }
 
-func (fh *FileHandle) addChunks(chunks []*filer_pb.FileChunk) {
+func (fh *FileHandle) GetEntry() *filer_pb.Entry {
+	fh.entryLock.Lock()
+	defer fh.entryLock.Unlock()
+	return fh.entry
+}
+func (fh *FileHandle) SetEntry(entry *filer_pb.Entry) {
+	fh.entryLock.Lock()
+	defer fh.entryLock.Unlock()
+	fh.entry = entry
+}
+
+func (fh *FileHandle) AddChunks(chunks []*filer_pb.FileChunk) {
+	fh.entryLock.Lock()
+	defer fh.entryLock.Unlock()
 
 	// find the earliest incoming chunk
 	newChunks := chunks
@@ -82,10 +95,8 @@ func (fh *FileHandle) addChunks(chunks []*filer_pb.FileChunk) {
 
 	glog.V(4).Infof("%s existing %d chunks adds %d more", fh.FullPath(), len(fh.entry.Chunks), len(chunks))
 
-	fh.chunkAddLock.Lock()
 	fh.entry.Chunks = append(fh.entry.Chunks, newChunks...)
 	fh.entryViewCache = nil
-	fh.chunkAddLock.Unlock()
 }
 
 func (fh *FileHandle) Release() {

weed/mount/filehandle_read.go

@@ -25,6 +25,9 @@ func (fh *FileHandle) readFromChunks(buff []byte, offset int64) (int64, error) {
 
 	fileFullPath := fh.FullPath()
 
+	fh.entryLock.Lock()
+	defer fh.entryLock.Unlock()
+
 	entry := fh.entry
 	if entry == nil {
 		return 0, io.EOF

weed/mount/weedfs.go

@@ -131,10 +131,11 @@ func (wfs *WFS) maybeReadEntry(inode uint64) (path util.FullPath, fh *FileHandle
 	}
 	var found bool
 	if fh, found = wfs.fhmap.FindFileHandle(inode); found {
-		if fh.entry.Attributes == nil {
-			fh.entry.Attributes = &filer_pb.FuseAttributes{}
+		entry = fh.GetEntry()
+		if entry != nil && fh.entry.Attributes == nil {
+			entry.Attributes = &filer_pb.FuseAttributes{}
 		}
-		return path, fh, fh.entry, fuse.OK
+		return path, fh, entry, fuse.OK
 	}
 	entry, status = wfs.maybeLoadEntry(path)
 	return

weed/mount/weedfs_attr.go

@@ -43,6 +43,10 @@ func (wfs *WFS) SetAttr(cancel <-chan struct{}, input *fuse.SetAttrIn, out *fuse
 	if status != fuse.OK {
 		return status
 	}
+	if fh != nil {
+		fh.entryLock.Lock()
+		defer fh.entryLock.Unlock()
+	}
 
 	if size, ok := input.GetSize(); ok {
 		glog.V(4).Infof("%v setattr set size=%v chunks=%d", path, size, len(entry.Chunks))

weed/mount/weedfs_file_sync.go

@@ -118,6 +118,9 @@ func (wfs *WFS) doFlush(fh *FileHandle, uid, gid uint32) fuse.Status {
 
 	err := wfs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
 
+		fh.entryLock.Lock()
+		defer fh.entryLock.Unlock()
+
 		entry := fh.entry
 		if entry == nil {
 			return nil

weed/mount/weedfs_xattr.go

@@ -94,10 +94,15 @@ func (wfs *WFS) SetXAttr(cancel <-chan struct{}, input *fuse.SetXAttrIn, attr st
 		}
 	}
 
-	path, _, entry, status := wfs.maybeReadEntry(input.NodeId)
+	path, fh, entry, status := wfs.maybeReadEntry(input.NodeId)
 	if status != fuse.OK {
 		return status
 	}
+	if fh != nil {
+		fh.entryLock.Lock()
+		defer fh.entryLock.Unlock()
+	}
+
 	if entry.Extended == nil {
 		entry.Extended = make(map[string][]byte)
 	}
@@ -154,10 +159,15 @@ func (wfs *WFS) RemoveXAttr(cancel <-chan struct{}, header *fuse.InHeader, attr
 	if len(attr) == 0 {
 		return fuse.EINVAL
 	}
-	path, _, entry, status := wfs.maybeReadEntry(header.NodeId)
+	path, fh, entry, status := wfs.maybeReadEntry(header.NodeId)
 	if status != fuse.OK {
 		return status
 	}
+	if fh != nil {
+		fh.entryLock.Lock()
+		defer fh.entryLock.Unlock()
+	}
+
 	if entry.Extended == nil {
 		return fuse.ENOATTR
 	}