Merge branch 'master' into ip-forwarding

- Merges aleksej-paschenko's with HEAD
- Adds vfs2 support for ip_forward

1 files changed, 37 insertions, 0 deletions

diff --git a/pkg/sentry/fsimpl/tmpfs/symlink.go b/pkg/sentry/fsimpl/tmpfs/symlink.go
new file mode 100644
index 000000000..b0de5fabe
--- /dev/null
+++ b/pkg/sentry/fsimpl/tmpfs/symlink.go
@@ -0,0 +1,37 @@
+// 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"
+)
+
+type symlink struct {
+	inode  inode
+	target string // immutable
+}
+
+func (fs *filesystem) newSymlink(kuid auth.KUID, kgid auth.KGID, mode linux.FileMode, target string) *inode {
+	link := &symlink{
+		target: target,
+	}
+	link.inode.init(link, fs, kuid, kgid, linux.S_IFLNK|mode)
+	link.inode.nlink = 1 // from parent directory
+	return &link.inode
+}
+
+// O_PATH is unimplemented, so there's no way to get a FileDescription
+// representing a symlink yet.