1 files changed, 31 insertions, 0 deletions
diff --git a/pkg/sentry/fs/file_state.go b/pkg/sentry/fs/file_state.go
new file mode 100644
index 000000000..523182d59
--- /dev/null
+++ b/pkg/sentry/fs/file_state.go
@@ -0,0 +1,31 @@
+// Copyright 2018 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package fs
+
+// beforeSave is invoked by stateify.
+func (f *File) beforeSave() {
+	f.saving = true
+	if f.flags.Async && f.async != nil {
+		f.async.Unregister(f)
+	}
+}
+
+// afterLoad is invoked by stateify.
+func (f *File) afterLoad() {
+	f.mu.Init()
+	if f.flags.Async && f.async != nil {
+		f.async.Register(f)
+	}
+}