You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 lines
4.4 KiB
105 lines
4.4 KiB
//
|
|
// Copyright (C) 2015 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 UPDATE_ENGINE_CROS_BOOT_CONTROL_CHROMEOS_H_
|
|
#define UPDATE_ENGINE_CROS_BOOT_CONTROL_CHROMEOS_H_
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
|
|
#include <base/callback.h>
|
|
#include <gtest/gtest_prod.h> // for FRIEND_TEST
|
|
|
|
#include "update_engine/common/boot_control_interface.h"
|
|
#include "update_engine/common/dynamic_partition_control_interface.h"
|
|
|
|
namespace chromeos_update_engine {
|
|
|
|
// The Chrome OS implementation of the BootControlInterface. This interface
|
|
// assumes the partition names and numbers used in Chrome OS devices.
|
|
class BootControlChromeOS : public BootControlInterface {
|
|
public:
|
|
BootControlChromeOS() = default;
|
|
~BootControlChromeOS() = default;
|
|
|
|
// Initialize the BootControl instance loading the constant values. Returns
|
|
// whether the operation succeeded. In case of failure, normally meaning
|
|
// some critical failure such as we couldn't determine the slot that we
|
|
// booted from, the implementation will pretend that there's only one slot and
|
|
// therefore A/B updates are disabled.
|
|
bool Init();
|
|
|
|
// BootControlInterface overrides.
|
|
unsigned int GetNumSlots() const override;
|
|
BootControlInterface::Slot GetCurrentSlot() const override;
|
|
bool GetPartitionDevice(const std::string& partition_name,
|
|
BootControlInterface::Slot slot,
|
|
bool not_in_payload,
|
|
std::string* device,
|
|
bool* is_dynamic) const override;
|
|
bool GetPartitionDevice(const std::string& partition_name,
|
|
BootControlInterface::Slot slot,
|
|
std::string* device) const override;
|
|
bool IsSlotBootable(BootControlInterface::Slot slot) const override;
|
|
bool MarkSlotUnbootable(BootControlInterface::Slot slot) override;
|
|
bool SetActiveBootSlot(BootControlInterface::Slot slot) override;
|
|
bool MarkBootSuccessfulAsync(base::Callback<void(bool)> callback) override;
|
|
bool IsSlotMarkedSuccessful(BootControlInterface::Slot slot) const override;
|
|
DynamicPartitionControlInterface* GetDynamicPartitionControl() override;
|
|
|
|
private:
|
|
friend class BootControlChromeOSTest;
|
|
FRIEND_TEST(BootControlChromeOSTest, SysfsBlockDeviceTest);
|
|
FRIEND_TEST(BootControlChromeOSTest, GetPartitionNumberTest);
|
|
FRIEND_TEST(BootControlChromeOSTest, ParseDlcPartitionNameTest);
|
|
|
|
// Returns the sysfs block device for a root block device. For example,
|
|
// SysfsBlockDevice("/dev/sda") returns "/sys/block/sda". Returns an empty
|
|
// string if the input device is not of the "/dev/xyz" form.
|
|
static std::string SysfsBlockDevice(const std::string& device);
|
|
|
|
// Returns true if the root |device| (e.g., "/dev/sdb") is known to be
|
|
// removable, false otherwise.
|
|
static bool IsRemovableDevice(const std::string& device);
|
|
|
|
// Return the hard-coded partition number used in Chrome OS for the passed
|
|
// |partition_name| and |slot|. In case of invalid data, returns -1.
|
|
int GetPartitionNumber(const std::string partition_name,
|
|
BootControlInterface::Slot slot) const;
|
|
|
|
// Extracts DLC module ID and package ID from partition name. The structure of
|
|
// the partition name is dlc/<dlc-id>/<dlc-package>. For example:
|
|
// dlc/fake-dlc/fake-package
|
|
bool ParseDlcPartitionName(const std::string partition_name,
|
|
std::string* dlc_id,
|
|
std::string* dlc_package) const;
|
|
|
|
// Cached values for GetNumSlots() and GetCurrentSlot().
|
|
BootControlInterface::Slot num_slots_{1};
|
|
BootControlInterface::Slot current_slot_{BootControlInterface::kInvalidSlot};
|
|
|
|
// The block device of the disk we booted from, without the partition number.
|
|
std::string boot_disk_name_;
|
|
|
|
std::unique_ptr<DynamicPartitionControlInterface> dynamic_partition_control_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(BootControlChromeOS);
|
|
};
|
|
|
|
} // namespace chromeos_update_engine
|
|
|
|
#endif // UPDATE_ENGINE_CROS_BOOT_CONTROL_CHROMEOS_H_
|