Refactor boot_control into a separate library.
This extracts the implementation of boot_control into a new library,
libboot_control. The bootctrl.default module now wraps this library.
This refactoring will allow us to re-use the same implementation in
HIDL.
Bug: 138861550
Test: mm bootctrl.default
Change-Id: Ic0558da3c2d8e6f5ebec63a497825c24b51623b7
diff --git a/boot_control/include/libboot_control/libboot_control.h b/boot_control/include/libboot_control/libboot_control.h
new file mode 100644
index 0000000..6582d02
--- /dev/null
+++ b/boot_control/include/libboot_control/libboot_control.h
@@ -0,0 +1,58 @@
+//
+// Copyright (C) 2019 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.
+//
+
+#pragma once
+
+#include <string>
+
+namespace android {
+namespace bootable {
+
+// Helper library to implement the IBootControl HAL using the misc partition.
+class BootControl {
+ public:
+ bool Init();
+ unsigned int GetNumberSlots();
+ unsigned int GetCurrentSlot();
+ bool MarkBootSuccessful();
+ bool SetActiveBootSlot(unsigned int slot);
+ bool SetSlotAsUnbootable(unsigned int slot);
+ bool SetSlotBootable(unsigned int slot);
+ bool IsSlotBootable(unsigned int slot);
+ const char* GetSuffix(unsigned int slot);
+ bool IsSlotMarkedSuccessful(unsigned int slot);
+
+ const std::string& misc_device() const {
+ return misc_device_;
+ }
+
+ private:
+ // Whether this object was initialized with data from the bootloader message
+ // that doesn't change until next reboot.
+ bool initialized_ = false;
+
+ // The path to the misc_device as reported in the fstab.
+ std::string misc_device_;
+
+ // The number of slots present on the device.
+ unsigned int num_slots_ = 0;
+
+ // The slot where we are running from.
+ unsigned int current_slot_ = 0;
+};
+
+} // namespace bootable
+} // namespace android