update_engine resize dynamic partitions during OTA.
update_engine uses device mapper to resize dynamic partitions
before opening the devices to apply the update.
* DeltaPerformer calls BootControlInterface::InitPartitionMetadata
when parsing the update manifest. The implementation for
BootControlAndroid::InitPartitionMetadata does the following
if sizes for dynamic partitions are incorrect (assuming updating
from slot A to B):
* Load metadata from metadata slot A
* Delete all extents of partitions at slot B (with _b suffix)
* Add extents for partitions at slot B
* Write metadata to metadata slot B
* Re-map all partitions at slot B using metadata slot B with
force_writable = true
* BootControlAndroid::GetPartitionDevice() checks device-mapper
before returning static partitions.
* PostinstallRunnerAction::Cleanup calls BootControlInterface::Cleanup
which unmaps all partitions at slot B.
A partition "foo" is considered dynamic if foo_a exists as a dynamic
partition OR foo_b does NOT exist as a static partition.
Bug: 110717529
Test: manual ota
Test: update_engine_unittests --gtest_filter=*BootControlAndroid*
Change-Id: I50f410b486a874242663624801c3694151bdda18
diff --git a/boot_control_android.h b/boot_control_android.h
index 1de0e41..24ab4dc 100644
--- a/boot_control_android.h
+++ b/boot_control_android.h
@@ -17,11 +17,16 @@
#ifndef UPDATE_ENGINE_BOOT_CONTROL_ANDROID_H_
#define UPDATE_ENGINE_BOOT_CONTROL_ANDROID_H_
+#include <map>
+#include <memory>
#include <string>
#include <android/hardware/boot/1.0/IBootControl.h>
+#include <base/files/file_util.h>
+#include <liblp/builder.h>
#include "update_engine/common/boot_control.h"
+#include "update_engine/dynamic_partition_control_interface.h"
namespace chromeos_update_engine {
@@ -46,9 +51,18 @@
bool MarkSlotUnbootable(BootControlInterface::Slot slot) override;
bool SetActiveBootSlot(BootControlInterface::Slot slot) override;
bool MarkBootSuccessfulAsync(base::Callback<void(bool)> callback) override;
+ bool InitPartitionMetadata(Slot slot,
+ const PartitionSizes& partition_sizes) override;
+ void Cleanup() override;
private:
::android::sp<::android::hardware::boot::V1_0::IBootControl> module_;
+ std::unique_ptr<DynamicPartitionControlInterface> dynamic_control_;
+
+ friend class BootControlAndroidTest;
+
+ // Wrapper method of IBootControl::getSuffix().
+ bool GetSuffix(Slot slot, std::string* out) const;
DISALLOW_COPY_AND_ASSIGN(BootControlAndroid);
};