1 files changed, 56 insertions, 0 deletions
diff --git a/pkg/sentry/fs/tmpfs/file_regular.go b/pkg/sentry/fs/tmpfs/file_regular.go
new file mode 100644
index 000000000..9811d90bc
--- /dev/null
+++ b/pkg/sentry/fs/tmpfs/file_regular.go
@@ -0,0 +1,56 @@
+// Copyright 2018 Google Inc.
+//
+// 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 tmpfs
+
+import (
+	"gvisor.googlesource.com/gvisor/pkg/sentry/context"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/fs"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/memmap"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/usermem"
+	"gvisor.googlesource.com/gvisor/pkg/waiter"
+)
+
+// regularFileOperations implements fs.FileOperations for a regular
+// tmpfs file.
+type regularFileOperations struct {
+	waiter.AlwaysReady   `state:"nosave"`
+	fsutil.NoopRelease   `state:"nosave"`
+	fsutil.GenericSeek   `state:"nosave"`
+	fsutil.NotDirReaddir `state:"nosave"`
+	fsutil.NoopFsync     `state:"nosave"`
+	fsutil.NoopFlush     `state:"nosave"`
+	fsutil.NoIoctl       `state:"nosave"`
+
+	// iops is the InodeOperations of a regular tmpfs file. It is
+	// guaranteed to be the same as file.Dirent.Inode.InodeOperations,
+	// see operations that take fs.File below.
+	iops *fileInodeOperations
+}
+
+// Read implements fs.FileOperations.Read.
+func (r *regularFileOperations) Read(ctx context.Context, file *fs.File, dst usermem.IOSequence, offset int64) (int64, error) {
+	return r.iops.read(ctx, dst, offset)
+}
+
+// Write implements fs.FileOperations.Write.
+func (r *regularFileOperations) Write(ctx context.Context, file *fs.File, src usermem.IOSequence, offset int64) (int64, error) {
+	return r.iops.write(ctx, src, offset)
+}
+
+// ConfigureMMap implements fs.FileOperations.ConfigureMMap.
+func (r *regularFileOperations) ConfigureMMap(ctx context.Context, file *fs.File, opts *memmap.MMapOpts) error {
+	return fsutil.GenericConfigureMMap(file, r.iops, opts)
+}