Allow update_engine to communicate with apexd for size calculation
In this CL, we created a ApexHandlerAndroid that can communicate with
apexd via binders to get better estimate for how much space the
update_engine should reserve for capex decompression.
The size check is placed in update_attempter_android, which is also used
in binary for sideloading OTA. Sideloading binary runs during recovery
when binder calls, apexd and data parition are all not available. As
such, it doesn't make sense to reserve space when sideloading.
Bug: 172911822
Test: atest ApexHandlerAndroidTest
Test: atest UpdateAttempterAndroidTest
Test: manually served ota using `update_engine_client --allocate` and
observed full.tmp was written in /data/apex/ota_reserved
Change-Id: Iccf3d8c2db24e8d8f3406d0aaa65cbf707c9ae51
diff --git a/aosp/apex_handler_interface.h b/aosp/apex_handler_interface.h
new file mode 100644
index 0000000..c3399b6
--- /dev/null
+++ b/aosp/apex_handler_interface.h
@@ -0,0 +1,36 @@
+//
+// Copyright (C) 2021 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 SYSTEM_UPDATE_ENGINE_AOSP_APEX_HANDLER_INTERFACE_H_
+#define SYSTEM_UPDATE_ENGINE_AOSP_APEX_HANDLER_INTERFACE_H_
+
+#include <vector>
+
+#include "update_engine/update_metadata.pb.h"
+
+namespace chromeos_update_engine {
+
+class ApexHandlerInterface {
+ public:
+ virtual ~ApexHandlerInterface() = default;
+ virtual uint64_t CalculateSize(
+ const std::vector<ApexInfo>& apex_infos) const = 0;
+ virtual bool AllocateSpace(const uint64_t size_required) const = 0;
+};
+
+} // namespace chromeos_update_engine
+
+#endif // SYSTEM_UPDATE_ENGINE_AOSP_APEX_HANDLER_INTERFACE_H_