//
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// Copyright (C) 2015 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/payload_generation_config.h"
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#include <algorithm>
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#include <map>
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#include <utility>
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#include <base/logging.h>
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#include <base/strings/string_number_conversions.h>
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#include <brillo/strings/string_utils.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_generator/boot_img_filesystem.h"
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#include "update_engine/payload_generator/delta_diff_generator.h"
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#include "update_engine/payload_generator/delta_diff_utils.h"
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#include "update_engine/payload_generator/ext2_filesystem.h"
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#include "update_engine/payload_generator/mapfile_filesystem.h"
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#include "update_engine/payload_generator/raw_filesystem.h"
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using std::string;
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namespace chromeos_update_engine {
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bool PostInstallConfig::IsEmpty() const {
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return !run && path.empty() && filesystem_type.empty() && !optional;
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}
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bool VerityConfig::IsEmpty() const {
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return hash_tree_data_extent.num_blocks() == 0 &&
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hash_tree_extent.num_blocks() == 0 && hash_tree_algorithm.empty() &&
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hash_tree_salt.empty() && fec_data_extent.num_blocks() == 0 &&
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fec_extent.num_blocks() == 0 && fec_roots == 0;
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}
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bool PartitionConfig::ValidateExists() const {
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TEST_AND_RETURN_FALSE(!path.empty());
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TEST_AND_RETURN_FALSE(utils::FileExists(path.c_str()));
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TEST_AND_RETURN_FALSE(size > 0);
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// The requested size is within the limits of the file.
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TEST_AND_RETURN_FALSE(static_cast<off_t>(size) <=
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utils::FileSize(path.c_str()));
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return true;
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}
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bool PartitionConfig::OpenFilesystem() {
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if (path.empty())
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return true;
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fs_interface.reset();
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if (diff_utils::IsExtFilesystem(path)) {
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fs_interface = Ext2Filesystem::CreateFromFile(path);
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// TODO(deymo): The delta generator algorithm doesn't support a block size
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// different than 4 KiB. Remove this check once that's fixed. b/26972455
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if (fs_interface) {
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TEST_AND_RETURN_FALSE(fs_interface->GetBlockSize() == kBlockSize);
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return true;
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}
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}
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if (!mapfile_path.empty()) {
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fs_interface = MapfileFilesystem::CreateFromFile(path, mapfile_path);
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if (fs_interface) {
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TEST_AND_RETURN_FALSE(fs_interface->GetBlockSize() == kBlockSize);
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return true;
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}
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}
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fs_interface = BootImgFilesystem::CreateFromFile(path);
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if (fs_interface) {
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TEST_AND_RETURN_FALSE(fs_interface->GetBlockSize() == kBlockSize);
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return true;
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}
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// Fall back to a RAW filesystem.
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TEST_AND_RETURN_FALSE(size % kBlockSize == 0);
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fs_interface = RawFilesystem::Create(
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"<" + name + "-partition>", kBlockSize, size / kBlockSize);
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return true;
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}
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bool ImageConfig::ValidateIsEmpty() const {
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TEST_AND_RETURN_FALSE(ImageInfoIsEmpty());
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return partitions.empty();
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}
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bool ImageConfig::LoadImageSize() {
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for (PartitionConfig& part : partitions) {
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if (part.path.empty())
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continue;
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part.size = utils::FileSize(part.path);
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}
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return true;
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}
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bool ImageConfig::LoadPostInstallConfig(const brillo::KeyValueStore& store) {
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bool found_postinstall = false;
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for (PartitionConfig& part : partitions) {
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bool run_postinstall;
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if (!store.GetBoolean("RUN_POSTINSTALL_" + part.name, &run_postinstall) ||
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!run_postinstall)
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continue;
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found_postinstall = true;
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part.postinstall.run = true;
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store.GetString("POSTINSTALL_PATH_" + part.name, &part.postinstall.path);
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store.GetString("FILESYSTEM_TYPE_" + part.name,
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&part.postinstall.filesystem_type);
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store.GetBoolean("POSTINSTALL_OPTIONAL_" + part.name,
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&part.postinstall.optional);
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}
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if (!found_postinstall) {
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LOG(ERROR) << "No valid postinstall config found.";
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return false;
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}
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return true;
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}
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bool ImageConfig::LoadDynamicPartitionMetadata(
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const brillo::KeyValueStore& store) {
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auto metadata = std::make_unique<DynamicPartitionMetadata>();
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string buf;
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if (!store.GetString("super_partition_groups", &buf)) {
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LOG(ERROR) << "Dynamic partition info missing super_partition_groups.";
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return false;
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}
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auto group_names = brillo::string_utils::Split(buf, " ");
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for (const auto& group_name : group_names) {
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DynamicPartitionGroup* group = metadata->add_groups();
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group->set_name(group_name);
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if (!store.GetString(group_name + "_size", &buf)) {
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LOG(ERROR) << "Missing " << group_name + "_size.";
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return false;
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}
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uint64_t max_size;
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if (!base::StringToUint64(buf, &max_size)) {
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LOG(ERROR) << group_name << "_size=" << buf << " is not an integer.";
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return false;
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}
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group->set_size(max_size);
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if (store.GetString(group_name + "_partition_list", &buf)) {
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auto partition_names = brillo::string_utils::Split(buf, " ");
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for (const auto& partition_name : partition_names) {
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group->add_partition_names()->assign(partition_name);
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}
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}
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}
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dynamic_partition_metadata = std::move(metadata);
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return true;
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}
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bool ImageConfig::ValidateDynamicPartitionMetadata() const {
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if (dynamic_partition_metadata == nullptr) {
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LOG(ERROR) << "dynamic_partition_metadata is not loaded.";
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return false;
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}
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for (const auto& group : dynamic_partition_metadata->groups()) {
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uint64_t sum_size = 0;
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for (const auto& partition_name : group.partition_names()) {
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auto partition_config = std::find_if(partitions.begin(),
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partitions.end(),
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[&partition_name](const auto& e) {
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return e.name == partition_name;
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});
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if (partition_config == partitions.end()) {
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LOG(ERROR) << "Cannot find partition " << partition_name
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<< " which is in " << group.name() << "_partition_list";
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return false;
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}
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sum_size += partition_config->size;
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}
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if (sum_size > group.size()) {
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LOG(ERROR) << "Sum of sizes in " << group.name() << "_partition_list is "
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<< sum_size << ", which is greater than " << group.name()
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<< "_size (" << group.size() << ")";
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return false;
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}
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}
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return true;
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}
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bool ImageConfig::ImageInfoIsEmpty() const {
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return image_info.board().empty() && image_info.key().empty() &&
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image_info.channel().empty() && image_info.version().empty() &&
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image_info.build_channel().empty() &&
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image_info.build_version().empty();
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}
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PayloadVersion::PayloadVersion(uint64_t major_version, uint32_t minor_version) {
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major = major_version;
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minor = minor_version;
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}
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bool PayloadVersion::Validate() const {
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TEST_AND_RETURN_FALSE(major == kChromeOSMajorPayloadVersion ||
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major == kBrilloMajorPayloadVersion);
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TEST_AND_RETURN_FALSE(minor == kFullPayloadMinorVersion ||
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minor == kInPlaceMinorPayloadVersion ||
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minor == kSourceMinorPayloadVersion ||
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minor == kOpSrcHashMinorPayloadVersion ||
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minor == kBrotliBsdiffMinorPayloadVersion ||
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minor == kPuffdiffMinorPayloadVersion ||
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minor == kVerityMinorPayloadVersion);
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return true;
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}
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bool PayloadVersion::OperationAllowed(InstallOperation::Type operation) const {
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switch (operation) {
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// Full operations:
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case InstallOperation::REPLACE:
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case InstallOperation::REPLACE_BZ:
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// These operations were included in the original payload format.
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return true;
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case InstallOperation::REPLACE_XZ:
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// These operations are included in the major version used in Brillo, but
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// can also be used with minor version 3 or newer.
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return major == kBrilloMajorPayloadVersion ||
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minor >= kOpSrcHashMinorPayloadVersion;
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case InstallOperation::ZERO:
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case InstallOperation::DISCARD:
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// The implementation of these operations had a bug in earlier versions
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// that prevents them from being used in any payload. We will enable
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// them for delta payloads for now.
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return minor >= kBrotliBsdiffMinorPayloadVersion;
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// Delta operations:
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case InstallOperation::MOVE:
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case InstallOperation::BSDIFF:
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// MOVE and BSDIFF were replaced by SOURCE_COPY and SOURCE_BSDIFF and
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// should not be used in newer delta versions, since the idempotent checks
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// were removed.
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return minor == kInPlaceMinorPayloadVersion;
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case InstallOperation::SOURCE_COPY:
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case InstallOperation::SOURCE_BSDIFF:
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return minor >= kSourceMinorPayloadVersion;
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case InstallOperation::BROTLI_BSDIFF:
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return minor >= kBrotliBsdiffMinorPayloadVersion;
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case InstallOperation::PUFFDIFF:
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return minor >= kPuffdiffMinorPayloadVersion;
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}
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return false;
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}
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bool PayloadVersion::IsDelta() const {
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return minor != kFullPayloadMinorVersion;
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}
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bool PayloadVersion::InplaceUpdate() const {
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return minor == kInPlaceMinorPayloadVersion;
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}
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bool PayloadGenerationConfig::Validate() const {
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TEST_AND_RETURN_FALSE(version.Validate());
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TEST_AND_RETURN_FALSE(version.IsDelta() == is_delta);
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if (is_delta) {
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for (const PartitionConfig& part : source.partitions) {
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if (!part.path.empty()) {
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TEST_AND_RETURN_FALSE(part.ValidateExists());
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TEST_AND_RETURN_FALSE(part.size % block_size == 0);
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}
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// Source partition should not have postinstall or verity config.
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TEST_AND_RETURN_FALSE(part.postinstall.IsEmpty());
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TEST_AND_RETURN_FALSE(part.verity.IsEmpty());
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}
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// If new_image_info is present, old_image_info must be present.
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TEST_AND_RETURN_FALSE(source.ImageInfoIsEmpty() ==
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target.ImageInfoIsEmpty());
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} else {
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// All the "source" image fields must be empty for full payloads.
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TEST_AND_RETURN_FALSE(source.ValidateIsEmpty());
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}
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// In all cases, the target image must exists.
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for (const PartitionConfig& part : target.partitions) {
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TEST_AND_RETURN_FALSE(part.ValidateExists());
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TEST_AND_RETURN_FALSE(part.size % block_size == 0);
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if (version.minor == kInPlaceMinorPayloadVersion &&
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part.name == kPartitionNameRoot)
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TEST_AND_RETURN_FALSE(rootfs_partition_size >= part.size);
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if (version.major == kChromeOSMajorPayloadVersion)
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TEST_AND_RETURN_FALSE(part.postinstall.IsEmpty());
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if (version.minor < kVerityMinorPayloadVersion)
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TEST_AND_RETURN_FALSE(part.verity.IsEmpty());
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}
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TEST_AND_RETURN_FALSE(hard_chunk_size == -1 ||
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hard_chunk_size % block_size == 0);
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TEST_AND_RETURN_FALSE(soft_chunk_size % block_size == 0);
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TEST_AND_RETURN_FALSE(rootfs_partition_size % block_size == 0);
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return true;
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}
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} // namespace chromeos_update_engine
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