2 files changed, 23 insertions, 0 deletions
diff --git a/pkg/sentry/kernel/ipc/BUILD b/pkg/sentry/kernel/ipc/BUILD
index e42a94e15..bb5cf1c17 100644
--- a/pkg/sentry/kernel/ipc/BUILD
+++ b/pkg/sentry/kernel/ipc/BUILD
@@ -5,6 +5,7 @@ package(licenses = ["notice"])
 go_library(
     name = "ipc",
     srcs = [
+        "ns.go",
         "object.go",
         "registry.go",
     ],
diff --git a/pkg/sentry/kernel/ipc/ns.go b/pkg/sentry/kernel/ipc/ns.go
new file mode 100644
index 000000000..220c9eafb
--- /dev/null
+++ b/pkg/sentry/kernel/ipc/ns.go
@@ -0,0 +1,22 @@
+// Copyright 2021 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 ipc
+
+type contextID int
+
+// CtxIPCNamespace is the context.Value key used to retreive an IPC namespace.
+// We define it here because it's needed in several packages, and is not
+// possible to use otherwise without causing a circular depenedency.
+const CtxIPCNamespace contextID = iota