| /* |
| * 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. |
| */ |
| |
| #define LOG_TAG "derive_sdk" |
| |
| #include "derive_sdk.h" |
| |
| #include <android-base/file.h> |
| #include <android-base/logging.h> |
| #include <android-base/properties.h> |
| #include <android-modules-utils/sdk_level.h> |
| #include <dirent.h> |
| #include <sys/stat.h> |
| |
| #include <algorithm> |
| #include <iostream> |
| #include <vector> |
| |
| #include "packages/modules/SdkExtensions/proto/sdk.pb.h" |
| |
| namespace android { |
| namespace derivesdk { |
| |
| static const std::unordered_map<std::string, SdkModule> kApexNameToModule = { |
| {"com.android.art", SdkModule::ART}, |
| {"com.android.ipsec", SdkModule::IPSEC}, |
| {"com.android.media", SdkModule::MEDIA}, |
| {"com.android.mediaprovider", SdkModule::MEDIA_PROVIDER}, |
| {"com.android.permission", SdkModule::PERMISSIONS}, |
| {"com.android.sdkext", SdkModule::SDK_EXTENSIONS}, |
| {"com.android.os.statsd", SdkModule::STATSD}, |
| {"com.android.tethering", SdkModule::TETHERING}, |
| }; |
| |
| static const std::unordered_set<SdkModule> kRModules = { |
| SdkModule::IPSEC, SdkModule::MEDIA, |
| SdkModule::MEDIA_PROVIDER, SdkModule::PERMISSIONS, |
| SdkModule::SDK_EXTENSIONS, SdkModule::STATSD, |
| SdkModule::TETHERING, |
| }; |
| |
| static const std::unordered_set<SdkModule> kSModules = {SdkModule::ART}; |
| |
| bool ReadDatabase(const std::string& db_path, ExtensionDatabase& db) { |
| std::string contents; |
| if (!android::base::ReadFileToString(db_path, &contents, true)) { |
| PLOG(ERROR) << "failed to read " << db_path << ": "; |
| return false; |
| } |
| if (!db.ParseFromString(contents)) { |
| LOG(ERROR) << "failed to parse " << db_path; |
| return false; |
| } |
| return true; |
| } |
| |
| bool VersionRequirementsMet( |
| const ExtensionVersion& ext_version, |
| const std::unordered_set<SdkModule>& relevant_modules, |
| const std::unordered_map<SdkModule, int>& module_versions) { |
| for (const auto& requirement : ext_version.requirements()) { |
| // Only requirements on modules relevant for this extension matter. |
| if (relevant_modules.find(requirement.module()) == relevant_modules.end()) |
| continue; |
| |
| auto version = module_versions.find(requirement.module()); |
| if (version == module_versions.end()) { |
| LOG(DEBUG) << "Not version " << ext_version.version() << ": Module " |
| << requirement.module() << " is missing"; |
| return false; |
| } |
| if (version->second < requirement.version().version()) { |
| LOG(DEBUG) << "Not version " << ext_version.version() << ": Module " |
| << requirement.module() << " version (" << version->second |
| << ") too low. Needed " << requirement.version().version(); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| int GetSdkLevel(const ExtensionDatabase& db, |
| const std::unordered_set<SdkModule>& relevant_modules, |
| const std::unordered_map<SdkModule, int>& module_versions) { |
| int max = 0; |
| |
| for (const auto& ext_version : db.versions()) { |
| if (ext_version.version() > max && |
| VersionRequirementsMet(ext_version, relevant_modules, |
| module_versions)) { |
| max = ext_version.version(); |
| } |
| } |
| return max; |
| } |
| |
| bool SetSdkLevels(const std::string& mountpath) { |
| ExtensionDatabase db; |
| if (!ReadDatabase( |
| mountpath + "/com.android.sdkext/etc/extensions_db.binarypb", db)) { |
| LOG(ERROR) << "Failed to read database"; |
| return false; |
| } |
| std::unique_ptr<DIR, decltype(&closedir)> apex(opendir(mountpath.c_str()), |
| closedir); |
| if (!apex) { |
| LOG(ERROR) << "Could not read " + mountpath; |
| return false; |
| } |
| struct dirent* de; |
| std::unordered_map<SdkModule, int> versions; |
| while ((de = readdir(apex.get()))) { |
| std::string name = de->d_name; |
| if (name[0] == '.' || name.find('@') != std::string::npos) { |
| // Skip <name>@<ver> dirs, as they are bind-mounted to <name> |
| continue; |
| } |
| std::string path = mountpath + "/" + name + "/etc/sdkinfo.binarypb"; |
| struct stat statbuf; |
| if (stat(path.c_str(), &statbuf) != 0) { |
| continue; |
| } |
| auto module_itr = kApexNameToModule.find(name); |
| if (module_itr == kApexNameToModule.end()) { |
| LOG(WARNING) << "Found sdkinfo in unexpected apex " << name; |
| continue; |
| } |
| std::string contents; |
| if (!android::base::ReadFileToString(path, &contents, true)) { |
| LOG(ERROR) << "failed to read " << path; |
| continue; |
| } |
| SdkVersion sdk_version; |
| if (!sdk_version.ParseFromString(contents)) { |
| LOG(ERROR) << "failed to parse " << path; |
| continue; |
| } |
| SdkModule module = module_itr->second; |
| LOG(INFO) << "Read version " << sdk_version.version() << " from " << module; |
| versions[module] = sdk_version.version(); |
| } |
| |
| int version_R = GetSdkLevel(db, kRModules, versions); |
| LOG(INFO) << "R extension version is " << version_R; |
| |
| if (!android::base::SetProperty("build.version.extensions.r", |
| std::to_string(version_R))) { |
| LOG(ERROR) << "failed to set r sdk_info prop"; |
| return false; |
| } |
| if (android::modules::sdklevel::IsAtLeastS()) { |
| int version_S = GetSdkLevel(db, kSModules, versions); |
| LOG(INFO) << "S extension version is " << version_S; |
| if (!android::base::SetProperty("build.version.extensions.s", |
| std::to_string(version_S))) { |
| LOG(ERROR) << "failed to set s sdk_info prop"; |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| } // namespace derivesdk |
| } // namespace android |