From 00d9776a4bb1cc1d7125af7d3e54a939a4f3847a Mon Sep 17 00:00:00 2001
From: Dean Deng <deandeng@google.com>
Date: Mon, 6 Apr 2020 07:30:20 -0700
Subject: Add socket files to tmpfs VFS2.

Updates #1476.

PiperOrigin-RevId: 305024274
---
 pkg/sentry/fsimpl/tmpfs/socket_file.go | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 pkg/sentry/fsimpl/tmpfs/socket_file.go

(limited to 'pkg/sentry/fsimpl/tmpfs/socket_file.go')

diff --git a/pkg/sentry/fsimpl/tmpfs/socket_file.go b/pkg/sentry/fsimpl/tmpfs/socket_file.go
new file mode 100644
index 000000000..25c2321af
--- /dev/null
+++ b/pkg/sentry/fsimpl/tmpfs/socket_file.go
@@ -0,0 +1,34 @@
+// Copyright 2019 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 tmpfs
+
+import (
+	"gvisor.dev/gvisor/pkg/abi/linux"
+	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
+	"gvisor.dev/gvisor/pkg/sentry/socket/unix/transport"
+)
+
+// socketFile is a socket (=S_IFSOCK) tmpfs file.
+type socketFile struct {
+	inode inode
+	ep    transport.BoundEndpoint
+}
+
+func (fs *filesystem) newSocketFile(creds *auth.Credentials, mode linux.FileMode, ep transport.BoundEndpoint) *inode {
+	file := &socketFile{ep: ep}
+	file.inode.init(file, fs, creds, mode)
+	file.inode.nlink = 1 // from parent directory
+	return &file.inode
+}
-- 
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