From 8caf231cb14128938a08208a0580e37e20be1fc1 Mon Sep 17 00:00:00 2001
From: Chong Cai <chongc@google.com>
Date: Tue, 3 Aug 2021 13:46:38 -0700
Subject: Add Lifecycle controls

Also change runsc pause/resume cmd to access Lifecycle instead of
containerManager.

PiperOrigin-RevId: 388534928
---
 pkg/sentry/control/BUILD        |  1 +
 pkg/sentry/control/lifecycle.go | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 pkg/sentry/control/lifecycle.go

(limited to 'pkg')

diff --git a/pkg/sentry/control/BUILD b/pkg/sentry/control/BUILD
index deaf5fa23..9fb8a054d 100644
--- a/pkg/sentry/control/BUILD
+++ b/pkg/sentry/control/BUILD
@@ -6,6 +6,7 @@ go_library(
     name = "control",
     srcs = [
         "control.go",
+        "lifecycle.go",
         "logging.go",
         "pprof.go",
         "proc.go",
diff --git a/pkg/sentry/control/lifecycle.go b/pkg/sentry/control/lifecycle.go
new file mode 100644
index 000000000..67abf497d
--- /dev/null
+++ b/pkg/sentry/control/lifecycle.go
@@ -0,0 +1,36 @@
+// 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 control
+
+import (
+	"gvisor.dev/gvisor/pkg/sentry/kernel"
+)
+
+// Lifecycle provides functions related to starting and stopping tasks.
+type Lifecycle struct {
+	Kernel *kernel.Kernel
+}
+
+// Pause pauses all tasks, blocking until they are stopped.
+func (l *Lifecycle) Pause(_, _ *struct{}) error {
+	l.Kernel.Pause()
+	return nil
+}
+
+// Resume resumes all tasks.
+func (l *Lifecycle) Resume(_, _ *struct{}) error {
+	l.Kernel.Unpause()
+	return nil
+}
-- 
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