| /* |
| * 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 "IncrementalService" |
| |
| #include "IncrementalService.h" |
| |
| #include <android-base/file.h> |
| #include <android-base/logging.h> |
| #include <android-base/no_destructor.h> |
| #include <android-base/properties.h> |
| #include <android-base/stringprintf.h> |
| #include <android-base/strings.h> |
| #include <android/content/pm/IDataLoaderStatusListener.h> |
| #include <android/os/IVold.h> |
| #include <binder/BinderService.h> |
| #include <binder/Nullable.h> |
| #include <binder/ParcelFileDescriptor.h> |
| #include <binder/Status.h> |
| #include <sys/stat.h> |
| #include <uuid/uuid.h> |
| |
| #include <charconv> |
| #include <ctime> |
| #include <filesystem> |
| #include <iterator> |
| #include <span> |
| #include <type_traits> |
| |
| #include "Metadata.pb.h" |
| |
| using namespace std::literals; |
| using namespace android::content::pm; |
| namespace fs = std::filesystem; |
| |
| constexpr const char* kDataUsageStats = "android.permission.LOADER_USAGE_STATS"; |
| constexpr const char* kOpUsage = "android:loader_usage_stats"; |
| |
| namespace android::incremental { |
| |
| namespace { |
| |
| using IncrementalFileSystemControlParcel = |
| ::android::os::incremental::IncrementalFileSystemControlParcel; |
| |
| struct Constants { |
| static constexpr auto backing = "backing_store"sv; |
| static constexpr auto mount = "mount"sv; |
| static constexpr auto mountKeyPrefix = "MT_"sv; |
| static constexpr auto storagePrefix = "st"sv; |
| static constexpr auto mountpointMdPrefix = ".mountpoint."sv; |
| static constexpr auto infoMdName = ".info"sv; |
| static constexpr auto libDir = "lib"sv; |
| static constexpr auto libSuffix = ".so"sv; |
| static constexpr auto blockSize = 4096; |
| }; |
| |
| static const Constants& constants() { |
| static constexpr Constants c; |
| return c; |
| } |
| |
| template <base::LogSeverity level = base::ERROR> |
| bool mkdirOrLog(std::string_view name, int mode = 0770, bool allowExisting = true) { |
| auto cstr = path::c_str(name); |
| if (::mkdir(cstr, mode)) { |
| if (!allowExisting || errno != EEXIST) { |
| PLOG(level) << "Can't create directory '" << name << '\''; |
| return false; |
| } |
| struct stat st; |
| if (::stat(cstr, &st) || !S_ISDIR(st.st_mode)) { |
| PLOG(level) << "Path exists but is not a directory: '" << name << '\''; |
| return false; |
| } |
| } |
| if (::chmod(cstr, mode)) { |
| PLOG(level) << "Changing permission failed for '" << name << '\''; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static std::string toMountKey(std::string_view path) { |
| if (path.empty()) { |
| return "@none"; |
| } |
| if (path == "/"sv) { |
| return "@root"; |
| } |
| if (path::isAbsolute(path)) { |
| path.remove_prefix(1); |
| } |
| std::string res(path); |
| std::replace(res.begin(), res.end(), '/', '_'); |
| std::replace(res.begin(), res.end(), '@', '_'); |
| return std::string(constants().mountKeyPrefix) + res; |
| } |
| |
| static std::pair<std::string, std::string> makeMountDir(std::string_view incrementalDir, |
| std::string_view path) { |
| auto mountKey = toMountKey(path); |
| const auto prefixSize = mountKey.size(); |
| for (int counter = 0; counter < 1000; |
| mountKey.resize(prefixSize), base::StringAppendF(&mountKey, "%d", counter++)) { |
| auto mountRoot = path::join(incrementalDir, mountKey); |
| if (mkdirOrLog(mountRoot, 0777, false)) { |
| return {mountKey, mountRoot}; |
| } |
| } |
| return {}; |
| } |
| |
| template <class ProtoMessage, class Control> |
| static ProtoMessage parseFromIncfs(const IncFsWrapper* incfs, Control&& control, |
| std::string_view path) { |
| auto md = incfs->getMetadata(control, path); |
| ProtoMessage message; |
| return message.ParseFromArray(md.data(), md.size()) ? message : ProtoMessage{}; |
| } |
| |
| static bool isValidMountTarget(std::string_view path) { |
| return path::isAbsolute(path) && path::isEmptyDir(path).value_or(true); |
| } |
| |
| std::string makeBindMdName() { |
| static constexpr auto uuidStringSize = 36; |
| |
| uuid_t guid; |
| uuid_generate(guid); |
| |
| std::string name; |
| const auto prefixSize = constants().mountpointMdPrefix.size(); |
| name.reserve(prefixSize + uuidStringSize); |
| |
| name = constants().mountpointMdPrefix; |
| name.resize(prefixSize + uuidStringSize); |
| uuid_unparse(guid, name.data() + prefixSize); |
| |
| return name; |
| } |
| } // namespace |
| |
| const bool IncrementalService::sEnablePerfLogging = |
| android::base::GetBoolProperty("incremental.perflogging", false); |
| |
| IncrementalService::IncFsMount::~IncFsMount() { |
| if (dataLoaderStub) { |
| dataLoaderStub->destroy(); |
| } |
| LOG(INFO) << "Unmounting and cleaning up mount " << mountId << " with root '" << root << '\''; |
| for (auto&& [target, _] : bindPoints) { |
| LOG(INFO) << "\tbind: " << target; |
| incrementalService.mVold->unmountIncFs(target); |
| } |
| LOG(INFO) << "\troot: " << root; |
| incrementalService.mVold->unmountIncFs(path::join(root, constants().mount)); |
| cleanupFilesystem(root); |
| } |
| |
| auto IncrementalService::IncFsMount::makeStorage(StorageId id) -> StorageMap::iterator { |
| std::string name; |
| for (int no = nextStorageDirNo.fetch_add(1, std::memory_order_relaxed), i = 0; |
| i < 1024 && no >= 0; no = nextStorageDirNo.fetch_add(1, std::memory_order_relaxed), ++i) { |
| name.clear(); |
| base::StringAppendF(&name, "%.*s_%d_%d", int(constants().storagePrefix.size()), |
| constants().storagePrefix.data(), id, no); |
| auto fullName = path::join(root, constants().mount, name); |
| if (auto err = incrementalService.mIncFs->makeDir(control, fullName, 0755); !err) { |
| std::lock_guard l(lock); |
| return storages.insert_or_assign(id, Storage{std::move(fullName)}).first; |
| } else if (err != EEXIST) { |
| LOG(ERROR) << __func__ << "(): failed to create dir |" << fullName << "| " << err; |
| break; |
| } |
| } |
| nextStorageDirNo = 0; |
| return storages.end(); |
| } |
| |
| static std::unique_ptr<DIR, decltype(&::closedir)> openDir(const char* path) { |
| return {::opendir(path), ::closedir}; |
| } |
| |
| static int rmDirContent(const char* path) { |
| auto dir = openDir(path); |
| if (!dir) { |
| return -EINVAL; |
| } |
| while (auto entry = ::readdir(dir.get())) { |
| if (entry->d_name == "."sv || entry->d_name == ".."sv) { |
| continue; |
| } |
| auto fullPath = android::base::StringPrintf("%s/%s", path, entry->d_name); |
| if (entry->d_type == DT_DIR) { |
| if (const auto err = rmDirContent(fullPath.c_str()); err != 0) { |
| PLOG(WARNING) << "Failed to delete " << fullPath << " content"; |
| return err; |
| } |
| if (const auto err = ::rmdir(fullPath.c_str()); err != 0) { |
| PLOG(WARNING) << "Failed to rmdir " << fullPath; |
| return err; |
| } |
| } else { |
| if (const auto err = ::unlink(fullPath.c_str()); err != 0) { |
| PLOG(WARNING) << "Failed to delete " << fullPath; |
| return err; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| void IncrementalService::IncFsMount::cleanupFilesystem(std::string_view root) { |
| rmDirContent(path::join(root, constants().backing).c_str()); |
| ::rmdir(path::join(root, constants().backing).c_str()); |
| ::rmdir(path::join(root, constants().mount).c_str()); |
| ::rmdir(path::c_str(root)); |
| } |
| |
| IncrementalService::IncrementalService(ServiceManagerWrapper&& sm, std::string_view rootDir) |
| : mVold(sm.getVoldService()), |
| mDataLoaderManager(sm.getDataLoaderManager()), |
| mIncFs(sm.getIncFs()), |
| mAppOpsManager(sm.getAppOpsManager()), |
| mJni(sm.getJni()), |
| mIncrementalDir(rootDir) { |
| if (!mVold) { |
| LOG(FATAL) << "Vold service is unavailable"; |
| } |
| if (!mDataLoaderManager) { |
| LOG(FATAL) << "DataLoaderManagerService is unavailable"; |
| } |
| if (!mAppOpsManager) { |
| LOG(FATAL) << "AppOpsManager is unavailable"; |
| } |
| |
| mJobQueue.reserve(16); |
| mJobProcessor = std::thread([this]() { |
| mJni->initializeForCurrentThread(); |
| runJobProcessing(); |
| }); |
| |
| mountExistingImages(); |
| } |
| |
| IncrementalService::~IncrementalService() { |
| { |
| std::lock_guard lock(mJobMutex); |
| mRunning = false; |
| } |
| mJobCondition.notify_all(); |
| mJobProcessor.join(); |
| } |
| |
| inline const char* toString(TimePoint t) { |
| using SystemClock = std::chrono::system_clock; |
| time_t time = SystemClock::to_time_t( |
| SystemClock::now() + |
| std::chrono::duration_cast<SystemClock::duration>(t - Clock::now())); |
| return std::ctime(&time); |
| } |
| |
| inline const char* toString(IncrementalService::BindKind kind) { |
| switch (kind) { |
| case IncrementalService::BindKind::Temporary: |
| return "Temporary"; |
| case IncrementalService::BindKind::Permanent: |
| return "Permanent"; |
| } |
| } |
| |
| void IncrementalService::onDump(int fd) { |
| dprintf(fd, "Incremental is %s\n", incfs::enabled() ? "ENABLED" : "DISABLED"); |
| dprintf(fd, "Incremental dir: %s\n", mIncrementalDir.c_str()); |
| |
| std::unique_lock l(mLock); |
| |
| dprintf(fd, "Mounts (%d):\n", int(mMounts.size())); |
| for (auto&& [id, ifs] : mMounts) { |
| const IncFsMount& mnt = *ifs.get(); |
| dprintf(fd, "\t[%d]:\n", id); |
| dprintf(fd, "\t\tmountId: %d\n", mnt.mountId); |
| dprintf(fd, "\t\troot: %s\n", mnt.root.c_str()); |
| dprintf(fd, "\t\tnextStorageDirNo: %d\n", mnt.nextStorageDirNo.load()); |
| if (mnt.dataLoaderStub) { |
| const auto& dataLoaderStub = *mnt.dataLoaderStub; |
| dprintf(fd, "\t\tdataLoaderStatus: %d\n", dataLoaderStub.status()); |
| dprintf(fd, "\t\tdataLoaderStartRequested: %s\n", |
| dataLoaderStub.startRequested() ? "true" : "false"); |
| const auto& params = dataLoaderStub.params(); |
| dprintf(fd, "\t\tdataLoaderParams:\n"); |
| dprintf(fd, "\t\t\ttype: %s\n", toString(params.type).c_str()); |
| dprintf(fd, "\t\t\tpackageName: %s\n", params.packageName.c_str()); |
| dprintf(fd, "\t\t\tclassName: %s\n", params.className.c_str()); |
| dprintf(fd, "\t\t\targuments: %s\n", params.arguments.c_str()); |
| } |
| dprintf(fd, "\t\tstorages (%d):\n", int(mnt.storages.size())); |
| for (auto&& [storageId, storage] : mnt.storages) { |
| dprintf(fd, "\t\t\t[%d] -> [%s]\n", storageId, storage.name.c_str()); |
| } |
| |
| dprintf(fd, "\t\tbindPoints (%d):\n", int(mnt.bindPoints.size())); |
| for (auto&& [target, bind] : mnt.bindPoints) { |
| dprintf(fd, "\t\t\t[%s]->[%d]:\n", target.c_str(), bind.storage); |
| dprintf(fd, "\t\t\t\tsavedFilename: %s\n", bind.savedFilename.c_str()); |
| dprintf(fd, "\t\t\t\tsourceDir: %s\n", bind.sourceDir.c_str()); |
| dprintf(fd, "\t\t\t\tkind: %s\n", toString(bind.kind)); |
| } |
| } |
| |
| dprintf(fd, "Sorted binds (%d):\n", int(mBindsByPath.size())); |
| for (auto&& [target, mountPairIt] : mBindsByPath) { |
| const auto& bind = mountPairIt->second; |
| dprintf(fd, "\t\t[%s]->[%d]:\n", target.c_str(), bind.storage); |
| dprintf(fd, "\t\t\tsavedFilename: %s\n", bind.savedFilename.c_str()); |
| dprintf(fd, "\t\t\tsourceDir: %s\n", bind.sourceDir.c_str()); |
| dprintf(fd, "\t\t\tkind: %s\n", toString(bind.kind)); |
| } |
| } |
| |
| void IncrementalService::onSystemReady() { |
| if (mSystemReady.exchange(true)) { |
| return; |
| } |
| |
| std::vector<IfsMountPtr> mounts; |
| { |
| std::lock_guard l(mLock); |
| mounts.reserve(mMounts.size()); |
| for (auto&& [id, ifs] : mMounts) { |
| if (ifs->mountId == id) { |
| mounts.push_back(ifs); |
| } |
| } |
| } |
| |
| if (mounts.empty()) { |
| return; |
| } |
| |
| std::thread([this, mounts = std::move(mounts)]() { |
| mJni->initializeForCurrentThread(); |
| for (auto&& ifs : mounts) { |
| if (ifs->dataLoaderStub->create()) { |
| LOG(INFO) << "Successfully started data loader for mount " << ifs->mountId; |
| } else { |
| // TODO(b/133435829): handle data loader start failures |
| LOG(WARNING) << "Failed to start data loader for mount " << ifs->mountId; |
| } |
| } |
| }).detach(); |
| } |
| |
| auto IncrementalService::getStorageSlotLocked() -> MountMap::iterator { |
| for (;;) { |
| if (mNextId == kMaxStorageId) { |
| mNextId = 0; |
| } |
| auto id = ++mNextId; |
| auto [it, inserted] = mMounts.try_emplace(id, nullptr); |
| if (inserted) { |
| return it; |
| } |
| } |
| } |
| |
| StorageId IncrementalService::createStorage( |
| std::string_view mountPoint, DataLoaderParamsParcel&& dataLoaderParams, |
| const DataLoaderStatusListener& dataLoaderStatusListener, CreateOptions options) { |
| LOG(INFO) << "createStorage: " << mountPoint << " | " << int(options); |
| if (!path::isAbsolute(mountPoint)) { |
| LOG(ERROR) << "path is not absolute: " << mountPoint; |
| return kInvalidStorageId; |
| } |
| |
| auto mountNorm = path::normalize(mountPoint); |
| { |
| const auto id = findStorageId(mountNorm); |
| if (id != kInvalidStorageId) { |
| if (options & CreateOptions::OpenExisting) { |
| LOG(INFO) << "Opened existing storage " << id; |
| return id; |
| } |
| LOG(ERROR) << "Directory " << mountPoint << " is already mounted at storage " << id; |
| return kInvalidStorageId; |
| } |
| } |
| |
| if (!(options & CreateOptions::CreateNew)) { |
| LOG(ERROR) << "not requirested create new storage, and it doesn't exist: " << mountPoint; |
| return kInvalidStorageId; |
| } |
| |
| if (!path::isEmptyDir(mountNorm)) { |
| LOG(ERROR) << "Mounting over existing non-empty directory is not supported: " << mountNorm; |
| return kInvalidStorageId; |
| } |
| auto [mountKey, mountRoot] = makeMountDir(mIncrementalDir, mountNorm); |
| if (mountRoot.empty()) { |
| LOG(ERROR) << "Bad mount point"; |
| return kInvalidStorageId; |
| } |
| // Make sure the code removes all crap it may create while still failing. |
| auto firstCleanup = [](const std::string* ptr) { IncFsMount::cleanupFilesystem(*ptr); }; |
| auto firstCleanupOnFailure = |
| std::unique_ptr<std::string, decltype(firstCleanup)>(&mountRoot, firstCleanup); |
| |
| auto mountTarget = path::join(mountRoot, constants().mount); |
| const auto backing = path::join(mountRoot, constants().backing); |
| if (!mkdirOrLog(backing, 0777) || !mkdirOrLog(mountTarget)) { |
| return kInvalidStorageId; |
| } |
| |
| IncFsMount::Control control; |
| { |
| std::lock_guard l(mMountOperationLock); |
| IncrementalFileSystemControlParcel controlParcel; |
| |
| if (auto err = rmDirContent(backing.c_str())) { |
| LOG(ERROR) << "Coudn't clean the backing directory " << backing << ": " << err; |
| return kInvalidStorageId; |
| } |
| if (!mkdirOrLog(path::join(backing, ".index"), 0777)) { |
| return kInvalidStorageId; |
| } |
| auto status = mVold->mountIncFs(backing, mountTarget, 0, &controlParcel); |
| if (!status.isOk()) { |
| LOG(ERROR) << "Vold::mountIncFs() failed: " << status.toString8(); |
| return kInvalidStorageId; |
| } |
| if (controlParcel.cmd.get() < 0 || controlParcel.pendingReads.get() < 0 || |
| controlParcel.log.get() < 0) { |
| LOG(ERROR) << "Vold::mountIncFs() returned invalid control parcel."; |
| return kInvalidStorageId; |
| } |
| int cmd = controlParcel.cmd.release().release(); |
| int pendingReads = controlParcel.pendingReads.release().release(); |
| int logs = controlParcel.log.release().release(); |
| control = mIncFs->createControl(cmd, pendingReads, logs); |
| } |
| |
| std::unique_lock l(mLock); |
| const auto mountIt = getStorageSlotLocked(); |
| const auto mountId = mountIt->first; |
| l.unlock(); |
| |
| auto ifs = |
| std::make_shared<IncFsMount>(std::move(mountRoot), mountId, std::move(control), *this); |
| // Now it's the |ifs|'s responsibility to clean up after itself, and the only cleanup we need |
| // is the removal of the |ifs|. |
| firstCleanupOnFailure.release(); |
| |
| auto secondCleanup = [this, &l](auto itPtr) { |
| if (!l.owns_lock()) { |
| l.lock(); |
| } |
| mMounts.erase(*itPtr); |
| }; |
| auto secondCleanupOnFailure = |
| std::unique_ptr<decltype(mountIt), decltype(secondCleanup)>(&mountIt, secondCleanup); |
| |
| const auto storageIt = ifs->makeStorage(ifs->mountId); |
| if (storageIt == ifs->storages.end()) { |
| LOG(ERROR) << "Can't create a default storage directory"; |
| return kInvalidStorageId; |
| } |
| |
| { |
| metadata::Mount m; |
| m.mutable_storage()->set_id(ifs->mountId); |
| m.mutable_loader()->set_type((int)dataLoaderParams.type); |
| m.mutable_loader()->set_package_name(dataLoaderParams.packageName); |
| m.mutable_loader()->set_class_name(dataLoaderParams.className); |
| m.mutable_loader()->set_arguments(dataLoaderParams.arguments); |
| const auto metadata = m.SerializeAsString(); |
| m.mutable_loader()->release_arguments(); |
| m.mutable_loader()->release_class_name(); |
| m.mutable_loader()->release_package_name(); |
| if (auto err = |
| mIncFs->makeFile(ifs->control, |
| path::join(ifs->root, constants().mount, |
| constants().infoMdName), |
| 0777, idFromMetadata(metadata), |
| {.metadata = {metadata.data(), (IncFsSize)metadata.size()}})) { |
| LOG(ERROR) << "Saving mount metadata failed: " << -err; |
| return kInvalidStorageId; |
| } |
| } |
| |
| const auto bk = |
| (options & CreateOptions::PermanentBind) ? BindKind::Permanent : BindKind::Temporary; |
| if (auto err = addBindMount(*ifs, storageIt->first, storageIt->second.name, |
| std::string(storageIt->second.name), std::move(mountNorm), bk, l); |
| err < 0) { |
| LOG(ERROR) << "adding bind mount failed: " << -err; |
| return kInvalidStorageId; |
| } |
| |
| // Done here as well, all data structures are in good state. |
| secondCleanupOnFailure.release(); |
| |
| auto dataLoaderStub = |
| prepareDataLoader(*ifs, std::move(dataLoaderParams), &dataLoaderStatusListener); |
| CHECK(dataLoaderStub); |
| |
| mountIt->second = std::move(ifs); |
| l.unlock(); |
| |
| if (mSystemReady.load(std::memory_order_relaxed) && !dataLoaderStub->create()) { |
| // failed to create data loader |
| LOG(ERROR) << "initializeDataLoader() failed"; |
| deleteStorage(dataLoaderStub->id()); |
| return kInvalidStorageId; |
| } |
| |
| LOG(INFO) << "created storage " << mountId; |
| return mountId; |
| } |
| |
| StorageId IncrementalService::createLinkedStorage(std::string_view mountPoint, |
| StorageId linkedStorage, |
| IncrementalService::CreateOptions options) { |
| if (!isValidMountTarget(mountPoint)) { |
| LOG(ERROR) << "Mount point is invalid or missing"; |
| return kInvalidStorageId; |
| } |
| |
| std::unique_lock l(mLock); |
| const auto& ifs = getIfsLocked(linkedStorage); |
| if (!ifs) { |
| LOG(ERROR) << "Ifs unavailable"; |
| return kInvalidStorageId; |
| } |
| |
| const auto mountIt = getStorageSlotLocked(); |
| const auto storageId = mountIt->first; |
| const auto storageIt = ifs->makeStorage(storageId); |
| if (storageIt == ifs->storages.end()) { |
| LOG(ERROR) << "Can't create a new storage"; |
| mMounts.erase(mountIt); |
| return kInvalidStorageId; |
| } |
| |
| l.unlock(); |
| |
| const auto bk = |
| (options & CreateOptions::PermanentBind) ? BindKind::Permanent : BindKind::Temporary; |
| if (auto err = addBindMount(*ifs, storageIt->first, storageIt->second.name, |
| std::string(storageIt->second.name), path::normalize(mountPoint), |
| bk, l); |
| err < 0) { |
| LOG(ERROR) << "bindMount failed with error: " << err; |
| return kInvalidStorageId; |
| } |
| |
| mountIt->second = ifs; |
| return storageId; |
| } |
| |
| IncrementalService::BindPathMap::const_iterator IncrementalService::findStorageLocked( |
| std::string_view path) const { |
| auto bindPointIt = mBindsByPath.upper_bound(path); |
| if (bindPointIt == mBindsByPath.begin()) { |
| return mBindsByPath.end(); |
| } |
| --bindPointIt; |
| if (!path::startsWith(path, bindPointIt->first)) { |
| return mBindsByPath.end(); |
| } |
| return bindPointIt; |
| } |
| |
| StorageId IncrementalService::findStorageId(std::string_view path) const { |
| std::lock_guard l(mLock); |
| auto it = findStorageLocked(path); |
| if (it == mBindsByPath.end()) { |
| return kInvalidStorageId; |
| } |
| return it->second->second.storage; |
| } |
| |
| int IncrementalService::setStorageParams(StorageId storageId, bool enableReadLogs) { |
| const auto ifs = getIfs(storageId); |
| if (!ifs) { |
| LOG(ERROR) << "setStorageParams failed, invalid storageId: " << storageId; |
| return -EINVAL; |
| } |
| |
| const auto& params = ifs->dataLoaderStub->params(); |
| if (enableReadLogs) { |
| if (auto status = mAppOpsManager->checkPermission(kDataUsageStats, kOpUsage, |
| params.packageName.c_str()); |
| !status.isOk()) { |
| LOG(ERROR) << "checkPermission failed: " << status.toString8(); |
| return fromBinderStatus(status); |
| } |
| } |
| |
| if (auto status = applyStorageParams(*ifs, enableReadLogs); !status.isOk()) { |
| LOG(ERROR) << "applyStorageParams failed: " << status.toString8(); |
| return fromBinderStatus(status); |
| } |
| |
| if (enableReadLogs) { |
| registerAppOpsCallback(params.packageName); |
| } |
| |
| return 0; |
| } |
| |
| binder::Status IncrementalService::applyStorageParams(IncFsMount& ifs, bool enableReadLogs) { |
| using unique_fd = ::android::base::unique_fd; |
| ::android::os::incremental::IncrementalFileSystemControlParcel control; |
| control.cmd.reset(unique_fd(dup(ifs.control.cmd()))); |
| control.pendingReads.reset(unique_fd(dup(ifs.control.pendingReads()))); |
| auto logsFd = ifs.control.logs(); |
| if (logsFd >= 0) { |
| control.log.reset(unique_fd(dup(logsFd))); |
| } |
| |
| std::lock_guard l(mMountOperationLock); |
| return mVold->setIncFsMountOptions(control, enableReadLogs); |
| } |
| |
| void IncrementalService::deleteStorage(StorageId storageId) { |
| const auto ifs = getIfs(storageId); |
| if (!ifs) { |
| return; |
| } |
| deleteStorage(*ifs); |
| } |
| |
| void IncrementalService::deleteStorage(IncrementalService::IncFsMount& ifs) { |
| std::unique_lock l(ifs.lock); |
| deleteStorageLocked(ifs, std::move(l)); |
| } |
| |
| void IncrementalService::deleteStorageLocked(IncrementalService::IncFsMount& ifs, |
| std::unique_lock<std::mutex>&& ifsLock) { |
| const auto storages = std::move(ifs.storages); |
| // Don't move the bind points out: Ifs's dtor will use them to unmount everything. |
| const auto bindPoints = ifs.bindPoints; |
| ifsLock.unlock(); |
| |
| std::lock_guard l(mLock); |
| for (auto&& [id, _] : storages) { |
| if (id != ifs.mountId) { |
| mMounts.erase(id); |
| } |
| } |
| for (auto&& [path, _] : bindPoints) { |
| mBindsByPath.erase(path); |
| } |
| mMounts.erase(ifs.mountId); |
| } |
| |
| StorageId IncrementalService::openStorage(std::string_view pathInMount) { |
| if (!path::isAbsolute(pathInMount)) { |
| return kInvalidStorageId; |
| } |
| |
| return findStorageId(path::normalize(pathInMount)); |
| } |
| |
| FileId IncrementalService::nodeFor(StorageId storage, std::string_view subpath) const { |
| const auto ifs = getIfs(storage); |
| if (!ifs) { |
| return kIncFsInvalidFileId; |
| } |
| std::unique_lock l(ifs->lock); |
| auto storageIt = ifs->storages.find(storage); |
| if (storageIt == ifs->storages.end()) { |
| return kIncFsInvalidFileId; |
| } |
| if (subpath.empty() || subpath == "."sv) { |
| return kIncFsInvalidFileId; |
| } |
| auto path = path::join(ifs->root, constants().mount, storageIt->second.name, subpath); |
| l.unlock(); |
| return mIncFs->getFileId(ifs->control, path); |
| } |
| |
| std::pair<FileId, std::string_view> IncrementalService::parentAndNameFor( |
| StorageId storage, std::string_view subpath) const { |
| auto name = path::basename(subpath); |
| if (name.empty()) { |
| return {kIncFsInvalidFileId, {}}; |
| } |
| auto dir = path::dirname(subpath); |
| if (dir.empty() || dir == "/"sv) { |
| return {kIncFsInvalidFileId, {}}; |
| } |
| auto id = nodeFor(storage, dir); |
| return {id, name}; |
| } |
| |
| IncrementalService::IfsMountPtr IncrementalService::getIfs(StorageId storage) const { |
| std::lock_guard l(mLock); |
| return getIfsLocked(storage); |
| } |
| |
| const IncrementalService::IfsMountPtr& IncrementalService::getIfsLocked(StorageId storage) const { |
| auto it = mMounts.find(storage); |
| if (it == mMounts.end()) { |
| static const android::base::NoDestructor<IfsMountPtr> kEmpty{}; |
| return *kEmpty; |
| } |
| return it->second; |
| } |
| |
| int IncrementalService::bind(StorageId storage, std::string_view source, std::string_view target, |
| BindKind kind) { |
| if (!isValidMountTarget(target)) { |
| return -EINVAL; |
| } |
| |
| const auto ifs = getIfs(storage); |
| if (!ifs) { |
| return -EINVAL; |
| } |
| |
| std::unique_lock l(ifs->lock); |
| const auto storageInfo = ifs->storages.find(storage); |
| if (storageInfo == ifs->storages.end()) { |
| return -EINVAL; |
| } |
| std::string normSource = normalizePathToStorageLocked(storageInfo, source); |
| if (normSource.empty()) { |
| return -EINVAL; |
| } |
| l.unlock(); |
| std::unique_lock l2(mLock, std::defer_lock); |
| return addBindMount(*ifs, storage, storageInfo->second.name, std::move(normSource), |
| path::normalize(target), kind, l2); |
| } |
| |
| int IncrementalService::unbind(StorageId storage, std::string_view target) { |
| if (!path::isAbsolute(target)) { |
| return -EINVAL; |
| } |
| |
| LOG(INFO) << "Removing bind point " << target; |
| |
| // Here we should only look up by the exact target, not by a subdirectory of any existing mount, |
| // otherwise there's a chance to unmount something completely unrelated |
| const auto norm = path::normalize(target); |
| std::unique_lock l(mLock); |
| const auto storageIt = mBindsByPath.find(norm); |
| if (storageIt == mBindsByPath.end() || storageIt->second->second.storage != storage) { |
| return -EINVAL; |
| } |
| const auto bindIt = storageIt->second; |
| const auto storageId = bindIt->second.storage; |
| const auto ifs = getIfsLocked(storageId); |
| if (!ifs) { |
| LOG(ERROR) << "Internal error: storageId " << storageId << " for bound path " << target |
| << " is missing"; |
| return -EFAULT; |
| } |
| mBindsByPath.erase(storageIt); |
| l.unlock(); |
| |
| mVold->unmountIncFs(bindIt->first); |
| std::unique_lock l2(ifs->lock); |
| if (ifs->bindPoints.size() <= 1) { |
| ifs->bindPoints.clear(); |
| deleteStorageLocked(*ifs, std::move(l2)); |
| } else { |
| const std::string savedFile = std::move(bindIt->second.savedFilename); |
| ifs->bindPoints.erase(bindIt); |
| l2.unlock(); |
| if (!savedFile.empty()) { |
| mIncFs->unlink(ifs->control, path::join(ifs->root, constants().mount, savedFile)); |
| } |
| } |
| return 0; |
| } |
| |
| std::string IncrementalService::normalizePathToStorageLocked( |
| IncFsMount::StorageMap::iterator storageIt, std::string_view path) { |
| std::string normPath; |
| if (path::isAbsolute(path)) { |
| normPath = path::normalize(path); |
| if (!path::startsWith(normPath, storageIt->second.name)) { |
| return {}; |
| } |
| } else { |
| normPath = path::normalize(path::join(storageIt->second.name, path)); |
| } |
| return normPath; |
| } |
| |
| std::string IncrementalService::normalizePathToStorage(const IncrementalService::IfsMountPtr& ifs, |
| StorageId storage, std::string_view path) { |
| std::unique_lock l(ifs->lock); |
| const auto storageInfo = ifs->storages.find(storage); |
| if (storageInfo == ifs->storages.end()) { |
| return {}; |
| } |
| return normalizePathToStorageLocked(storageInfo, path); |
| } |
| |
| int IncrementalService::makeFile(StorageId storage, std::string_view path, int mode, FileId id, |
| incfs::NewFileParams params) { |
| if (auto ifs = getIfs(storage)) { |
| std::string normPath = normalizePathToStorage(ifs, storage, path); |
| if (normPath.empty()) { |
| LOG(ERROR) << "Internal error: storageId " << storage |
| << " failed to normalize: " << path; |
| return -EINVAL; |
| } |
| auto err = mIncFs->makeFile(ifs->control, normPath, mode, id, params); |
| if (err) { |
| LOG(ERROR) << "Internal error: storageId " << storage << " failed to makeFile: " << err; |
| return err; |
| } |
| return 0; |
| } |
| return -EINVAL; |
| } |
| |
| int IncrementalService::makeDir(StorageId storageId, std::string_view path, int mode) { |
| if (auto ifs = getIfs(storageId)) { |
| std::string normPath = normalizePathToStorage(ifs, storageId, path); |
| if (normPath.empty()) { |
| return -EINVAL; |
| } |
| return mIncFs->makeDir(ifs->control, normPath, mode); |
| } |
| return -EINVAL; |
| } |
| |
| int IncrementalService::makeDirs(StorageId storageId, std::string_view path, int mode) { |
| const auto ifs = getIfs(storageId); |
| if (!ifs) { |
| return -EINVAL; |
| } |
| std::string normPath = normalizePathToStorage(ifs, storageId, path); |
| if (normPath.empty()) { |
| return -EINVAL; |
| } |
| auto err = mIncFs->makeDir(ifs->control, normPath, mode); |
| if (err == -EEXIST) { |
| return 0; |
| } else if (err != -ENOENT) { |
| return err; |
| } |
| if (auto err = makeDirs(storageId, path::dirname(normPath), mode)) { |
| return err; |
| } |
| return mIncFs->makeDir(ifs->control, normPath, mode); |
| } |
| |
| int IncrementalService::link(StorageId sourceStorageId, std::string_view oldPath, |
| StorageId destStorageId, std::string_view newPath) { |
| auto ifsSrc = getIfs(sourceStorageId); |
| auto ifsDest = sourceStorageId == destStorageId ? ifsSrc : getIfs(destStorageId); |
| if (ifsSrc && ifsSrc == ifsDest) { |
| std::string normOldPath = normalizePathToStorage(ifsSrc, sourceStorageId, oldPath); |
| std::string normNewPath = normalizePathToStorage(ifsDest, destStorageId, newPath); |
| if (normOldPath.empty() || normNewPath.empty()) { |
| return -EINVAL; |
| } |
| return mIncFs->link(ifsSrc->control, normOldPath, normNewPath); |
| } |
| return -EINVAL; |
| } |
| |
| int IncrementalService::unlink(StorageId storage, std::string_view path) { |
| if (auto ifs = getIfs(storage)) { |
| std::string normOldPath = normalizePathToStorage(ifs, storage, path); |
| return mIncFs->unlink(ifs->control, normOldPath); |
| } |
| return -EINVAL; |
| } |
| |
| int IncrementalService::addBindMount(IncFsMount& ifs, StorageId storage, |
| std::string_view storageRoot, std::string&& source, |
| std::string&& target, BindKind kind, |
| std::unique_lock<std::mutex>& mainLock) { |
| if (!isValidMountTarget(target)) { |
| return -EINVAL; |
| } |
| |
| std::string mdFileName; |
| if (kind != BindKind::Temporary) { |
| metadata::BindPoint bp; |
| bp.set_storage_id(storage); |
| bp.set_allocated_dest_path(&target); |
| bp.set_allocated_source_subdir(&source); |
| const auto metadata = bp.SerializeAsString(); |
| bp.release_dest_path(); |
| bp.release_source_subdir(); |
| mdFileName = makeBindMdName(); |
| auto node = |
| mIncFs->makeFile(ifs.control, path::join(ifs.root, constants().mount, mdFileName), |
| 0444, idFromMetadata(metadata), |
| {.metadata = {metadata.data(), (IncFsSize)metadata.size()}}); |
| if (node) { |
| return int(node); |
| } |
| } |
| |
| return addBindMountWithMd(ifs, storage, std::move(mdFileName), std::move(source), |
| std::move(target), kind, mainLock); |
| } |
| |
| int IncrementalService::addBindMountWithMd(IncrementalService::IncFsMount& ifs, StorageId storage, |
| std::string&& metadataName, std::string&& source, |
| std::string&& target, BindKind kind, |
| std::unique_lock<std::mutex>& mainLock) { |
| { |
| std::lock_guard l(mMountOperationLock); |
| const auto status = mVold->bindMount(source, target); |
| if (!status.isOk()) { |
| LOG(ERROR) << "Calling Vold::bindMount() failed: " << status.toString8(); |
| return status.exceptionCode() == binder::Status::EX_SERVICE_SPECIFIC |
| ? status.serviceSpecificErrorCode() > 0 ? -status.serviceSpecificErrorCode() |
| : status.serviceSpecificErrorCode() == 0 |
| ? -EFAULT |
| : status.serviceSpecificErrorCode() |
| : -EIO; |
| } |
| } |
| |
| if (!mainLock.owns_lock()) { |
| mainLock.lock(); |
| } |
| std::lock_guard l(ifs.lock); |
| const auto [it, _] = |
| ifs.bindPoints.insert_or_assign(target, |
| IncFsMount::Bind{storage, std::move(metadataName), |
| std::move(source), kind}); |
| mBindsByPath[std::move(target)] = it; |
| return 0; |
| } |
| |
| RawMetadata IncrementalService::getMetadata(StorageId storage, FileId node) const { |
| const auto ifs = getIfs(storage); |
| if (!ifs) { |
| return {}; |
| } |
| return mIncFs->getMetadata(ifs->control, node); |
| } |
| |
| std::vector<std::string> IncrementalService::listFiles(StorageId storage) const { |
| const auto ifs = getIfs(storage); |
| if (!ifs) { |
| return {}; |
| } |
| |
| std::unique_lock l(ifs->lock); |
| auto subdirIt = ifs->storages.find(storage); |
| if (subdirIt == ifs->storages.end()) { |
| return {}; |
| } |
| auto dir = path::join(ifs->root, constants().mount, subdirIt->second.name); |
| l.unlock(); |
| |
| const auto prefixSize = dir.size() + 1; |
| std::vector<std::string> todoDirs{std::move(dir)}; |
| std::vector<std::string> result; |
| do { |
| auto currDir = std::move(todoDirs.back()); |
| todoDirs.pop_back(); |
| |
| auto d = |
| std::unique_ptr<DIR, decltype(&::closedir)>(::opendir(currDir.c_str()), ::closedir); |
| while (auto e = ::readdir(d.get())) { |
| if (e->d_type == DT_REG) { |
| result.emplace_back( |
| path::join(std::string_view(currDir).substr(prefixSize), e->d_name)); |
| continue; |
| } |
| if (e->d_type == DT_DIR) { |
| if (e->d_name == "."sv || e->d_name == ".."sv) { |
| continue; |
| } |
| todoDirs.emplace_back(path::join(currDir, e->d_name)); |
| continue; |
| } |
| } |
| } while (!todoDirs.empty()); |
| return result; |
| } |
| |
| bool IncrementalService::startLoading(StorageId storage) const { |
| DataLoaderStubPtr dataLoaderStub; |
| { |
| std::unique_lock l(mLock); |
| const auto& ifs = getIfsLocked(storage); |
| if (!ifs) { |
| return false; |
| } |
| dataLoaderStub = ifs->dataLoaderStub; |
| if (!dataLoaderStub) { |
| return false; |
| } |
| } |
| return dataLoaderStub->requestStart(); |
| } |
| |
| void IncrementalService::mountExistingImages() { |
| for (const auto& entry : fs::directory_iterator(mIncrementalDir)) { |
| const auto path = entry.path().u8string(); |
| const auto name = entry.path().filename().u8string(); |
| if (!base::StartsWith(name, constants().mountKeyPrefix)) { |
| continue; |
| } |
| const auto root = path::join(mIncrementalDir, name); |
| if (!mountExistingImage(root)) { |
| IncFsMount::cleanupFilesystem(path); |
| } |
| } |
| } |
| |
| bool IncrementalService::mountExistingImage(std::string_view root) { |
| auto mountTarget = path::join(root, constants().mount); |
| const auto backing = path::join(root, constants().backing); |
| |
| IncrementalFileSystemControlParcel controlParcel; |
| auto status = mVold->mountIncFs(backing, mountTarget, 0, &controlParcel); |
| if (!status.isOk()) { |
| LOG(ERROR) << "Vold::mountIncFs() failed: " << status.toString8(); |
| return false; |
| } |
| |
| int cmd = controlParcel.cmd.release().release(); |
| int pendingReads = controlParcel.pendingReads.release().release(); |
| int logs = controlParcel.log.release().release(); |
| IncFsMount::Control control = mIncFs->createControl(cmd, pendingReads, logs); |
| |
| auto ifs = std::make_shared<IncFsMount>(std::string(root), -1, std::move(control), *this); |
| |
| auto mount = parseFromIncfs<metadata::Mount>(mIncFs.get(), ifs->control, |
| path::join(mountTarget, constants().infoMdName)); |
| if (!mount.has_loader() || !mount.has_storage()) { |
| LOG(ERROR) << "Bad mount metadata in mount at " << root; |
| return false; |
| } |
| |
| ifs->mountId = mount.storage().id(); |
| mNextId = std::max(mNextId, ifs->mountId + 1); |
| |
| // DataLoader params |
| DataLoaderParamsParcel dataLoaderParams; |
| { |
| const auto& loader = mount.loader(); |
| dataLoaderParams.type = (android::content::pm::DataLoaderType)loader.type(); |
| dataLoaderParams.packageName = loader.package_name(); |
| dataLoaderParams.className = loader.class_name(); |
| dataLoaderParams.arguments = loader.arguments(); |
| } |
| |
| prepareDataLoader(*ifs, std::move(dataLoaderParams), nullptr); |
| CHECK(ifs->dataLoaderStub); |
| |
| std::vector<std::pair<std::string, metadata::BindPoint>> bindPoints; |
| auto d = openDir(path::c_str(mountTarget)); |
| while (auto e = ::readdir(d.get())) { |
| if (e->d_type == DT_REG) { |
| auto name = std::string_view(e->d_name); |
| if (name.starts_with(constants().mountpointMdPrefix)) { |
| bindPoints.emplace_back(name, |
| parseFromIncfs<metadata::BindPoint>(mIncFs.get(), |
| ifs->control, |
| path::join(mountTarget, |
| name))); |
| if (bindPoints.back().second.dest_path().empty() || |
| bindPoints.back().second.source_subdir().empty()) { |
| bindPoints.pop_back(); |
| mIncFs->unlink(ifs->control, path::join(ifs->root, constants().mount, name)); |
| } |
| } |
| } else if (e->d_type == DT_DIR) { |
| if (e->d_name == "."sv || e->d_name == ".."sv) { |
| continue; |
| } |
| auto name = std::string_view(e->d_name); |
| if (name.starts_with(constants().storagePrefix)) { |
| int storageId; |
| const auto res = std::from_chars(name.data() + constants().storagePrefix.size() + 1, |
| name.data() + name.size(), storageId); |
| if (res.ec != std::errc{} || *res.ptr != '_') { |
| LOG(WARNING) << "Ignoring storage with invalid name '" << name << "' for mount " |
| << root; |
| continue; |
| } |
| auto [_, inserted] = mMounts.try_emplace(storageId, ifs); |
| if (!inserted) { |
| LOG(WARNING) << "Ignoring storage with duplicate id " << storageId |
| << " for mount " << root; |
| continue; |
| } |
| ifs->storages.insert_or_assign(storageId, |
| IncFsMount::Storage{ |
| path::join(root, constants().mount, name)}); |
| mNextId = std::max(mNextId, storageId + 1); |
| } |
| } |
| } |
| |
| if (ifs->storages.empty()) { |
| LOG(WARNING) << "No valid storages in mount " << root; |
| return false; |
| } |
| |
| int bindCount = 0; |
| for (auto&& bp : bindPoints) { |
| std::unique_lock l(mLock, std::defer_lock); |
| bindCount += !addBindMountWithMd(*ifs, bp.second.storage_id(), std::move(bp.first), |
| std::move(*bp.second.mutable_source_subdir()), |
| std::move(*bp.second.mutable_dest_path()), |
| BindKind::Permanent, l); |
| } |
| |
| if (bindCount == 0) { |
| LOG(WARNING) << "No valid bind points for mount " << root; |
| deleteStorage(*ifs); |
| return false; |
| } |
| |
| mMounts[ifs->mountId] = std::move(ifs); |
| return true; |
| } |
| |
| IncrementalService::DataLoaderStubPtr IncrementalService::prepareDataLoader( |
| IncrementalService::IncFsMount& ifs, DataLoaderParamsParcel&& params, |
| const DataLoaderStatusListener* externalListener) { |
| std::unique_lock l(ifs.lock); |
| if (ifs.dataLoaderStub) { |
| LOG(INFO) << "Skipped data loader preparation because it already exists"; |
| return ifs.dataLoaderStub; |
| } |
| |
| FileSystemControlParcel fsControlParcel; |
| fsControlParcel.incremental = aidl::make_nullable<IncrementalFileSystemControlParcel>(); |
| fsControlParcel.incremental->cmd.reset(base::unique_fd(::dup(ifs.control.cmd()))); |
| fsControlParcel.incremental->pendingReads.reset( |
| base::unique_fd(::dup(ifs.control.pendingReads()))); |
| fsControlParcel.incremental->log.reset(base::unique_fd(::dup(ifs.control.logs()))); |
| fsControlParcel.service = new IncrementalServiceConnector(*this, ifs.mountId); |
| |
| ifs.dataLoaderStub = new DataLoaderStub(*this, ifs.mountId, std::move(params), |
| std::move(fsControlParcel), externalListener); |
| return ifs.dataLoaderStub; |
| } |
| |
| template <class Duration> |
| static long elapsedMcs(Duration start, Duration end) { |
| return std::chrono::duration_cast<std::chrono::microseconds>(end - start).count(); |
| } |
| |
| // Extract lib files from zip, create new files in incfs and write data to them |
| bool IncrementalService::configureNativeBinaries(StorageId storage, std::string_view apkFullPath, |
| std::string_view libDirRelativePath, |
| std::string_view abi) { |
| auto start = Clock::now(); |
| |
| const auto ifs = getIfs(storage); |
| if (!ifs) { |
| LOG(ERROR) << "Invalid storage " << storage; |
| return false; |
| } |
| |
| // First prepare target directories if they don't exist yet |
| if (auto res = makeDirs(storage, libDirRelativePath, 0755)) { |
| LOG(ERROR) << "Failed to prepare target lib directory " << libDirRelativePath |
| << " errno: " << res; |
| return false; |
| } |
| |
| auto mkDirsTs = Clock::now(); |
| ZipArchiveHandle zipFileHandle; |
| if (OpenArchive(path::c_str(apkFullPath), &zipFileHandle)) { |
| LOG(ERROR) << "Failed to open zip file at " << apkFullPath; |
| return false; |
| } |
| |
| // Need a shared pointer: will be passing it into all unpacking jobs. |
| std::shared_ptr<ZipArchive> zipFile(zipFileHandle, [](ZipArchiveHandle h) { CloseArchive(h); }); |
| void* cookie = nullptr; |
| const auto libFilePrefix = path::join(constants().libDir, abi); |
| if (StartIteration(zipFile.get(), &cookie, libFilePrefix, constants().libSuffix)) { |
| LOG(ERROR) << "Failed to start zip iteration for " << apkFullPath; |
| return false; |
| } |
| auto endIteration = [](void* cookie) { EndIteration(cookie); }; |
| auto iterationCleaner = std::unique_ptr<void, decltype(endIteration)>(cookie, endIteration); |
| |
| auto openZipTs = Clock::now(); |
| |
| std::vector<Job> jobQueue; |
| ZipEntry entry; |
| std::string_view fileName; |
| while (!Next(cookie, &entry, &fileName)) { |
| if (fileName.empty()) { |
| continue; |
| } |
| |
| auto startFileTs = Clock::now(); |
| |
| const auto libName = path::basename(fileName); |
| const auto targetLibPath = path::join(libDirRelativePath, libName); |
| const auto targetLibPathAbsolute = normalizePathToStorage(ifs, storage, targetLibPath); |
| // If the extract file already exists, skip |
| if (access(targetLibPathAbsolute.c_str(), F_OK) == 0) { |
| if (sEnablePerfLogging) { |
| LOG(INFO) << "incfs: Native lib file already exists: " << targetLibPath |
| << "; skipping extraction, spent " |
| << elapsedMcs(startFileTs, Clock::now()) << "mcs"; |
| } |
| continue; |
| } |
| |
| // Create new lib file without signature info |
| incfs::NewFileParams libFileParams = { |
| .size = entry.uncompressed_length, |
| .signature = {}, |
| // Metadata of the new lib file is its relative path |
| .metadata = {targetLibPath.c_str(), (IncFsSize)targetLibPath.size()}, |
| }; |
| incfs::FileId libFileId = idFromMetadata(targetLibPath); |
| if (auto res = mIncFs->makeFile(ifs->control, targetLibPathAbsolute, 0777, libFileId, |
| libFileParams)) { |
| LOG(ERROR) << "Failed to make file for: " << targetLibPath << " errno: " << res; |
| // If one lib file fails to be created, abort others as well |
| return false; |
| } |
| |
| auto makeFileTs = Clock::now(); |
| |
| // If it is a zero-byte file, skip data writing |
| if (entry.uncompressed_length == 0) { |
| if (sEnablePerfLogging) { |
| LOG(INFO) << "incfs: Extracted " << libName |
| << "(0 bytes): " << elapsedMcs(startFileTs, makeFileTs) << "mcs"; |
| } |
| continue; |
| } |
| |
| jobQueue.emplace_back([this, zipFile, entry, ifs = std::weak_ptr<IncFsMount>(ifs), |
| libFileId, libPath = std::move(targetLibPath), |
| makeFileTs]() mutable { |
| extractZipFile(ifs.lock(), zipFile.get(), entry, libFileId, libPath, makeFileTs); |
| }); |
| |
| if (sEnablePerfLogging) { |
| auto prepareJobTs = Clock::now(); |
| LOG(INFO) << "incfs: Processed " << libName << ": " |
| << elapsedMcs(startFileTs, prepareJobTs) |
| << "mcs, make file: " << elapsedMcs(startFileTs, makeFileTs) |
| << " prepare job: " << elapsedMcs(makeFileTs, prepareJobTs); |
| } |
| } |
| |
| auto processedTs = Clock::now(); |
| |
| if (!jobQueue.empty()) { |
| { |
| std::lock_guard lock(mJobMutex); |
| if (mRunning) { |
| auto& existingJobs = mJobQueue[ifs->mountId]; |
| if (existingJobs.empty()) { |
| existingJobs = std::move(jobQueue); |
| } else { |
| existingJobs.insert(existingJobs.end(), std::move_iterator(jobQueue.begin()), |
| std::move_iterator(jobQueue.end())); |
| } |
| } |
| } |
| mJobCondition.notify_all(); |
| } |
| |
| if (sEnablePerfLogging) { |
| auto end = Clock::now(); |
| LOG(INFO) << "incfs: configureNativeBinaries complete in " << elapsedMcs(start, end) |
| << "mcs, make dirs: " << elapsedMcs(start, mkDirsTs) |
| << " open zip: " << elapsedMcs(mkDirsTs, openZipTs) |
| << " make files: " << elapsedMcs(openZipTs, processedTs) |
| << " schedule jobs: " << elapsedMcs(processedTs, end); |
| } |
| |
| return true; |
| } |
| |
| void IncrementalService::extractZipFile(const IfsMountPtr& ifs, ZipArchiveHandle zipFile, |
| ZipEntry& entry, const incfs::FileId& libFileId, |
| std::string_view targetLibPath, |
| Clock::time_point scheduledTs) { |
| if (!ifs) { |
| LOG(INFO) << "Skipping zip file " << targetLibPath << " extraction for an expired mount"; |
| return; |
| } |
| |
| auto libName = path::basename(targetLibPath); |
| auto startedTs = Clock::now(); |
| |
| // Write extracted data to new file |
| // NOTE: don't zero-initialize memory, it may take a while for nothing |
| auto libData = std::unique_ptr<uint8_t[]>(new uint8_t[entry.uncompressed_length]); |
| if (ExtractToMemory(zipFile, &entry, libData.get(), entry.uncompressed_length)) { |
| LOG(ERROR) << "Failed to extract native lib zip entry: " << libName; |
| return; |
| } |
| |
| auto extractFileTs = Clock::now(); |
| |
| const auto writeFd = mIncFs->openForSpecialOps(ifs->control, libFileId); |
| if (!writeFd.ok()) { |
| LOG(ERROR) << "Failed to open write fd for: " << targetLibPath << " errno: " << writeFd; |
| return; |
| } |
| |
| auto openFileTs = Clock::now(); |
| const int numBlocks = |
| (entry.uncompressed_length + constants().blockSize - 1) / constants().blockSize; |
| std::vector<IncFsDataBlock> instructions(numBlocks); |
| auto remainingData = std::span(libData.get(), entry.uncompressed_length); |
| for (int i = 0; i < numBlocks; i++) { |
| const auto blockSize = std::min<long>(constants().blockSize, remainingData.size()); |
| instructions[i] = IncFsDataBlock{ |
| .fileFd = writeFd.get(), |
| .pageIndex = static_cast<IncFsBlockIndex>(i), |
| .compression = INCFS_COMPRESSION_KIND_NONE, |
| .kind = INCFS_BLOCK_KIND_DATA, |
| .dataSize = static_cast<uint32_t>(blockSize), |
| .data = reinterpret_cast<const char*>(remainingData.data()), |
| }; |
| remainingData = remainingData.subspan(blockSize); |
| } |
| auto prepareInstsTs = Clock::now(); |
| |
| size_t res = mIncFs->writeBlocks(instructions); |
| if (res != instructions.size()) { |
| LOG(ERROR) << "Failed to write data into: " << targetLibPath; |
| return; |
| } |
| |
| if (sEnablePerfLogging) { |
| auto endFileTs = Clock::now(); |
| LOG(INFO) << "incfs: Extracted " << libName << "(" << entry.compressed_length << " -> " |
| << entry.uncompressed_length << " bytes): " << elapsedMcs(startedTs, endFileTs) |
| << "mcs, scheduling delay: " << elapsedMcs(scheduledTs, startedTs) |
| << " extract: " << elapsedMcs(startedTs, extractFileTs) |
| << " open: " << elapsedMcs(extractFileTs, openFileTs) |
| << " prepare: " << elapsedMcs(openFileTs, prepareInstsTs) |
| << " write: " << elapsedMcs(prepareInstsTs, endFileTs); |
| } |
| } |
| |
| bool IncrementalService::waitForNativeBinariesExtraction(StorageId storage) { |
| struct WaitPrinter { |
| const Clock::time_point startTs = Clock::now(); |
| ~WaitPrinter() noexcept { |
| if (sEnablePerfLogging) { |
| const auto endTs = Clock::now(); |
| LOG(INFO) << "incfs: waitForNativeBinariesExtraction() complete in " |
| << elapsedMcs(startTs, endTs) << "mcs"; |
| } |
| } |
| } waitPrinter; |
| |
| MountId mount; |
| { |
| auto ifs = getIfs(storage); |
| if (!ifs) { |
| return true; |
| } |
| mount = ifs->mountId; |
| } |
| |
| std::unique_lock lock(mJobMutex); |
| mJobCondition.wait(lock, [this, mount] { |
| return !mRunning || |
| (mPendingJobsMount != mount && mJobQueue.find(mount) == mJobQueue.end()); |
| }); |
| return mRunning; |
| } |
| |
| void IncrementalService::runJobProcessing() { |
| for (;;) { |
| std::unique_lock lock(mJobMutex); |
| mJobCondition.wait(lock, [this]() { return !mRunning || !mJobQueue.empty(); }); |
| if (!mRunning) { |
| return; |
| } |
| |
| auto it = mJobQueue.begin(); |
| mPendingJobsMount = it->first; |
| auto queue = std::move(it->second); |
| mJobQueue.erase(it); |
| lock.unlock(); |
| |
| for (auto&& job : queue) { |
| job(); |
| } |
| |
| lock.lock(); |
| mPendingJobsMount = kInvalidStorageId; |
| lock.unlock(); |
| mJobCondition.notify_all(); |
| } |
| } |
| |
| void IncrementalService::registerAppOpsCallback(const std::string& packageName) { |
| sp<IAppOpsCallback> listener; |
| { |
| std::unique_lock lock{mCallbacksLock}; |
| auto& cb = mCallbackRegistered[packageName]; |
| if (cb) { |
| return; |
| } |
| cb = new AppOpsListener(*this, packageName); |
| listener = cb; |
| } |
| |
| mAppOpsManager->startWatchingMode(AppOpsManager::OP_GET_USAGE_STATS, |
| String16(packageName.c_str()), listener); |
| } |
| |
| bool IncrementalService::unregisterAppOpsCallback(const std::string& packageName) { |
| sp<IAppOpsCallback> listener; |
| { |
| std::unique_lock lock{mCallbacksLock}; |
| auto found = mCallbackRegistered.find(packageName); |
| if (found == mCallbackRegistered.end()) { |
| return false; |
| } |
| listener = found->second; |
| mCallbackRegistered.erase(found); |
| } |
| |
| mAppOpsManager->stopWatchingMode(listener); |
| return true; |
| } |
| |
| void IncrementalService::onAppOpChanged(const std::string& packageName) { |
| if (!unregisterAppOpsCallback(packageName)) { |
| return; |
| } |
| |
| std::vector<IfsMountPtr> affected; |
| { |
| std::lock_guard l(mLock); |
| affected.reserve(mMounts.size()); |
| for (auto&& [id, ifs] : mMounts) { |
| if (ifs->mountId == id && ifs->dataLoaderStub->params().packageName == packageName) { |
| affected.push_back(ifs); |
| } |
| } |
| } |
| for (auto&& ifs : affected) { |
| applyStorageParams(*ifs, false); |
| } |
| } |
| |
| IncrementalService::DataLoaderStub::~DataLoaderStub() { |
| waitForDestroy(); |
| } |
| |
| bool IncrementalService::DataLoaderStub::create() { |
| { |
| std::unique_lock lock(mStatusMutex); |
| mStartRequested = false; |
| mDestroyRequested = false; |
| } |
| bool created = false; |
| auto status = mService.mDataLoaderManager->initializeDataLoader(mId, mParams, mControl, this, |
| &created); |
| if (!status.isOk() || !created) { |
| LOG(ERROR) << "Failed to create a data loader for mount " << mId; |
| return false; |
| } |
| return true; |
| } |
| |
| bool IncrementalService::DataLoaderStub::requestStart() { |
| { |
| std::unique_lock lock(mStatusMutex); |
| mStartRequested = true; |
| if (mStatus != IDataLoaderStatusListener::DATA_LOADER_CREATED) { |
| return true; |
| } |
| } |
| return start(); |
| } |
| |
| bool IncrementalService::DataLoaderStub::start() { |
| sp<IDataLoader> dataloader; |
| auto status = mService.mDataLoaderManager->getDataLoader(mId, &dataloader); |
| if (!status.isOk()) { |
| return false; |
| } |
| if (!dataloader) { |
| return false; |
| } |
| status = dataloader->start(mId); |
| if (!status.isOk()) { |
| return false; |
| } |
| return true; |
| } |
| |
| void IncrementalService::DataLoaderStub::destroy() { |
| { |
| std::unique_lock lock(mStatusMutex); |
| mDestroyRequested = true; |
| } |
| mService.mDataLoaderManager->destroyDataLoader(mId); |
| |
| waitForDestroy(); |
| } |
| |
| bool IncrementalService::DataLoaderStub::waitForDestroy() { |
| auto now = std::chrono::steady_clock::now(); |
| std::unique_lock lock(mStatusMutex); |
| return mStatusCondition.wait_until(lock, now + 60s, [this] { |
| return mStatus == IDataLoaderStatusListener::DATA_LOADER_DESTROYED; |
| }); |
| } |
| |
| binder::Status IncrementalService::DataLoaderStub::onStatusChanged(MountId mountId, int newStatus) { |
| if (mStatus == newStatus) { |
| return binder::Status::ok(); |
| } |
| |
| if (mListener) { |
| mListener->onStatusChanged(mountId, newStatus); |
| } |
| |
| bool startRequested; |
| bool destroyRequested; |
| { |
| std::unique_lock lock(mStatusMutex); |
| if (mStatus == newStatus) { |
| return binder::Status::ok(); |
| } |
| |
| startRequested = mStartRequested; |
| destroyRequested = mDestroyRequested; |
| |
| mStatus = newStatus; |
| } |
| |
| switch (newStatus) { |
| case IDataLoaderStatusListener::DATA_LOADER_CREATED: { |
| if (startRequested) { |
| LOG(WARNING) << "Start was requested, triggering, for mount: " << mountId; |
| start(); |
| } |
| break; |
| } |
| case IDataLoaderStatusListener::DATA_LOADER_DESTROYED: { |
| if (!destroyRequested) { |
| LOG(WARNING) << "DataLoader destroyed, reconnecting, for mount: " << mountId; |
| create(); |
| } |
| break; |
| } |
| case IDataLoaderStatusListener::DATA_LOADER_STARTED: { |
| break; |
| } |
| case IDataLoaderStatusListener::DATA_LOADER_STOPPED: { |
| break; |
| } |
| case IDataLoaderStatusListener::DATA_LOADER_IMAGE_READY: { |
| break; |
| } |
| case IDataLoaderStatusListener::DATA_LOADER_IMAGE_NOT_READY: { |
| break; |
| } |
| case IDataLoaderStatusListener::DATA_LOADER_UNRECOVERABLE: { |
| // Nothing for now. Rely on externalListener to handle this. |
| break; |
| } |
| default: { |
| LOG(WARNING) << "Unknown data loader status: " << newStatus |
| << " for mount: " << mountId; |
| break; |
| } |
| } |
| |
| return binder::Status::ok(); |
| } |
| |
| void IncrementalService::AppOpsListener::opChanged(int32_t, const String16&) { |
| incrementalService.onAppOpChanged(packageName); |
| } |
| |
| binder::Status IncrementalService::IncrementalServiceConnector::setStorageParams( |
| bool enableReadLogs, int32_t* _aidl_return) { |
| *_aidl_return = incrementalService.setStorageParams(storage, enableReadLogs); |
| return binder::Status::ok(); |
| } |
| |
| FileId IncrementalService::idFromMetadata(std::span<const uint8_t> metadata) { |
| return IncFs_FileIdFromMetadata({(const char*)metadata.data(), metadata.size()}); |
| } |
| |
| } // namespace android::incremental |