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/*
* Copyright (C) 2018 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 LIBLP_READER_H_
#define LIBLP_READER_H_
#include <stddef.h>
#include <memory>
#include <liblp/liblp.h>
namespace android {
namespace fs_mgr {
// Parse an LpMetadataGeometry from a buffer. The buffer must be at least
// LP_METADATA_GEOMETRY_SIZE bytes in size.
bool ParseGeometry(const void* buffer, LpMetadataGeometry* geometry);
// Helper functions for manually reading geometry and metadata.
std::unique_ptr<LpMetadata> ParseMetadata(const LpMetadataGeometry& geometry, int fd);
std::unique_ptr<LpMetadata> ParseMetadata(const LpMetadataGeometry& geometry, const void* buffer,
size_t size);
bool ReadLogicalPartitionGeometry(int fd, LpMetadataGeometry* geometry);
bool ReadPrimaryGeometry(int fd, LpMetadataGeometry* geometry);
bool ReadBackupGeometry(int fd, LpMetadataGeometry* geometry);
// These functions assume a valid geometry and slot number, and do not obey
// auto-slot-suffixing. They are used for tests and for checking whether
// the metadata is coherent across primary and backup copies.
std::unique_ptr<LpMetadata> ReadPrimaryMetadata(int fd, const LpMetadataGeometry& geometry,
uint32_t slot_number);
std::unique_ptr<LpMetadata> ReadBackupMetadata(int fd, const LpMetadataGeometry& geometry,
uint32_t slot_number);
} // namespace fs_mgr
} // namespace android
#endif /* LIBLP_READER_H_ */
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