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//
// 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 <stdint.h>
#include <string>
#include <vector>
#include <liblp/builder.h>
#include <update_engine/update_metadata.pb.h>
#include "utility.h"
namespace android {
namespace snapshot {
// Helper class that modifies a super partition metadata for an update for
// Virtual A/B devices.
class SnapshotMetadataUpdater {
using DeltaArchiveManifest = chromeos_update_engine::DeltaArchiveManifest;
using DynamicPartitionMetadata = chromeos_update_engine::DynamicPartitionMetadata;
using DynamicPartitionGroup = chromeos_update_engine::DynamicPartitionGroup;
using PartitionUpdate = chromeos_update_engine::PartitionUpdate;
public:
// Caller is responsible for ensuring the lifetime of manifest to be longer
// than SnapshotMetadataUpdater.
SnapshotMetadataUpdater(android::fs_mgr::MetadataBuilder* builder, uint32_t target_slot,
const DeltaArchiveManifest& manifest);
bool Update() const;
private:
bool RenameGroupSuffix() const;
bool ShrinkPartitions() const;
bool DeletePartitions() const;
bool MovePartitionsToDefault() const;
bool ShrinkGroups() const;
bool DeleteGroups() const;
bool AddGroups() const;
bool GrowGroups() const;
bool AddPartitions() const;
bool GrowPartitions() const;
bool MovePartitionsToCorrectGroup() const;
// Wraps a DynamicPartitionGroup with a slot-suffixed name. Always use
// .name instead of ->name() because .name has the slot suffix (e.g.
// .name is "group_b" and ->name() is "group".)
struct Group {
std::string name;
const DynamicPartitionGroup* group;
const DynamicPartitionGroup* operator->() const { return group; }
};
// Wraps a PartitionUpdate with a slot-suffixed name / group name. Always use
// .name instead of ->partition_name() because .name has the slot suffix (e.g.
// .name is "system_b" and ->partition_name() is "system".)
struct Partition {
std::string name;
std::string group_name;
const PartitionUpdate* partition;
const PartitionUpdate* operator->() const { return partition; }
};
android::fs_mgr::MetadataBuilder* const builder_;
const std::string target_suffix_;
std::vector<Group> groups_;
std::vector<Partition> partitions_;
bool partial_update_{false};
};
} // namespace snapshot
} // namespace android
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