//
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// Copyright (C) 2012 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "update_engine/payload_generator/delta_diff_generator.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <algorithm>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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#include <base/logging.h>
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#include "update_engine/common/utils.h"
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#include "update_engine/payload_consumer/delta_performer.h"
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#include "update_engine/payload_consumer/payload_constants.h"
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#include "update_engine/payload_generator/ab_generator.h"
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#include "update_engine/payload_generator/blob_file_writer.h"
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#include "update_engine/payload_generator/delta_diff_utils.h"
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#include "update_engine/payload_generator/full_update_generator.h"
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#include "update_engine/payload_generator/inplace_generator.h"
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#include "update_engine/payload_generator/payload_file.h"
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using std::string;
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using std::unique_ptr;
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using std::vector;
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namespace chromeos_update_engine {
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// bytes
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const size_t kRootFSPartitionSize = static_cast<size_t>(2) * 1024 * 1024 * 1024;
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const size_t kBlockSize = 4096; // bytes
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bool GenerateUpdatePayloadFile(const PayloadGenerationConfig& config,
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const string& output_path,
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const string& private_key_path,
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uint64_t* metadata_size) {
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if (!config.version.Validate()) {
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LOG(ERROR) << "Unsupported major.minor version: " << config.version.major
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<< "." << config.version.minor;
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return false;
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}
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// Create empty payload file object.
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PayloadFile payload;
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TEST_AND_RETURN_FALSE(payload.Init(config));
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const string kTempFileTemplate("CrAU_temp_data.XXXXXX");
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string temp_file_path;
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int data_file_fd;
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TEST_AND_RETURN_FALSE(
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utils::MakeTempFile(kTempFileTemplate, &temp_file_path, &data_file_fd));
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ScopedPathUnlinker temp_file_unlinker(temp_file_path);
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TEST_AND_RETURN_FALSE(data_file_fd >= 0);
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{
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off_t data_file_size = 0;
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ScopedFdCloser data_file_fd_closer(&data_file_fd);
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BlobFileWriter blob_file(data_file_fd, &data_file_size);
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if (config.is_delta) {
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TEST_AND_RETURN_FALSE(config.source.partitions.size() ==
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config.target.partitions.size());
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}
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PartitionConfig empty_part("");
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for (size_t i = 0; i < config.target.partitions.size(); i++) {
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const PartitionConfig& old_part =
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config.is_delta ? config.source.partitions[i] : empty_part;
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const PartitionConfig& new_part = config.target.partitions[i];
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LOG(INFO) << "Partition name: " << new_part.name;
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LOG(INFO) << "Partition size: " << new_part.size;
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LOG(INFO) << "Block count: " << new_part.size / config.block_size;
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// Select payload generation strategy based on the config.
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unique_ptr<OperationsGenerator> strategy;
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if (!old_part.path.empty()) {
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// Delta update.
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if (config.version.minor == kInPlaceMinorPayloadVersion) {
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LOG(INFO) << "Using generator InplaceGenerator().";
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strategy.reset(new InplaceGenerator());
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} else {
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LOG(INFO) << "Using generator ABGenerator().";
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strategy.reset(new ABGenerator());
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}
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} else {
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LOG(INFO) << "Using generator FullUpdateGenerator().";
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strategy.reset(new FullUpdateGenerator());
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}
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vector<AnnotatedOperation> aops;
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// Generate the operations using the strategy we selected above.
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TEST_AND_RETURN_FALSE(strategy->GenerateOperations(
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config, old_part, new_part, &blob_file, &aops));
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// Filter the no-operations. OperationsGenerators should not output this
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// kind of operations normally, but this is an extra step to fix that if
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// happened.
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diff_utils::FilterNoopOperations(&aops);
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TEST_AND_RETURN_FALSE(payload.AddPartition(old_part, new_part, aops));
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}
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}
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LOG(INFO) << "Writing payload file...";
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// Write payload file to disk.
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TEST_AND_RETURN_FALSE(payload.WritePayload(
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output_path, temp_file_path, private_key_path, metadata_size));
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LOG(INFO) << "All done. Successfully created delta file with "
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<< "metadata size = " << *metadata_size;
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return true;
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}
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}; // namespace chromeos_update_engine
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