Add support for checkpointing
Checkpointing uses a combination of files on the meta partition
and the checkpoint= fs_mgr flag. Checkpointed partitions will
revert to their starting state on reboot unless checkpoint commit
is called.
Test: Run vdc commands, check file on metadata
Merged-In: Icba16578608a6cbf922472e9d4ae5b8cf5f016c6
Change-Id: Icba16578608a6cbf922472e9d4ae5b8cf5f016c6
diff --git a/Checkpoint.h b/Checkpoint.h
new file mode 100644
index 0000000..8449956
--- /dev/null
+++ b/Checkpoint.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef _CHECKPOINT_H
+#define _CHECKPOINT_H
+
+#include <string>
+
+namespace android {
+namespace vold {
+
+bool cp_startCheckpoint(int retry);
+
+bool cp_commitChanges();
+
+void cp_abortChanges();
+
+bool cp_needRollback(const std::string& id);
+
+bool cp_needsCheckpoint();
+
+bool cp_prepareDriveForCheckpoint(const std::string& mountPoint);
+
+bool cp_markBootAttempt();
+
+} // namespace vold
+} // namespace android
+
+#endif