| /* |
| * 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/properties.h> |
| #include <android-base/stringprintf.h> |
| #include <android-base/strings.h> |
| #include <android/content/pm/IDataLoaderStatusListener.h> |
| #include <android/os/IVold.h> |
| #include <androidfw/ZipFileRO.h> |
| #include <androidfw/ZipUtils.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 <zlib.h> |
| |
| #include <ctime> |
| #include <filesystem> |
| #include <iterator> |
| #include <span> |
| #include <stack> |
| #include <thread> |
| #include <type_traits> |
| |
| #include "Metadata.pb.h" |
| |
| using namespace std::literals; |
| using namespace android::content::pm; |
| namespace fs = std::filesystem; |
| |
| 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 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 |
| |
| IncrementalService::IncFsMount::~IncFsMount() { |
| incrementalService.mDataLoaderManager->destroyDataLoader(mountId); |
| control.reset(); |
| 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()), |
| mIncrementalDir(rootDir) { |
| if (!mVold) { |
| LOG(FATAL) << "Vold service is unavailable"; |
| } |
| if (!mDataLoaderManager) { |
| LOG(FATAL) << "DataLoaderManagerService is unavailable"; |
| } |
| mountExistingImages(); |
| } |
| |
| FileId IncrementalService::idFromMetadata(std::span<const uint8_t> metadata) { |
| return IncFs_FileIdFromMetadata({(const char*)metadata.data(), metadata.size()}); |
| } |
| |
| IncrementalService::~IncrementalService() = default; |
| |
| 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\tnextStorageDirNo: %d\n", mnt.nextStorageDirNo.load()); |
| dprintf(fd, "\t\tdataLoaderStatus: %d\n", mnt.dataLoaderStatus.load()); |
| dprintf(fd, "\t\tconnectionLostTime: %s\n", toString(mnt.connectionLostTime)); |
| if (mnt.savedDataLoaderParams) { |
| const auto& params = mnt.savedDataLoaderParams.value(); |
| dprintf(fd, "\t\tsavedDataLoaderParams:\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)); |
| } |
| } |
| |
| std::optional<std::future<void>> IncrementalService::onSystemReady() { |
| std::promise<void> threadFinished; |
| 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); |
| } |
| } |
| } |
| |
| std::thread([this, mounts = std::move(mounts)]() { |
| for (auto&& ifs : mounts) { |
| if (prepareDataLoader(*ifs)) { |
| 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; |
| } |
| } |
| mPrepareDataLoaders.set_value_at_thread_exit(); |
| }).detach(); |
| return mPrepareDataLoaders.get_future(); |
| } |
| |
| 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; |
| } |
| control.cmd = controlParcel.cmd.release().release(); |
| control.pendingReads = controlParcel.pendingReads.release().release(); |
| control.logs = controlParcel.log.release().release(); |
| } |
| |
| 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(); |
| |
| if (!prepareDataLoader(*ifs, &dataLoaderParams, &dataLoaderStatusListener)) { |
| LOG(ERROR) << "prepareDataLoader() failed"; |
| deleteStorageLocked(*ifs, std::move(l)); |
| return kInvalidStorageId; |
| } |
| |
| mountIt->second = std::move(ifs); |
| l.unlock(); |
| 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; |
| } |
| |
| 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 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 = normalizePathToStorage(ifs, storage, source); |
| 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::normalizePathToStorage(const IncrementalService::IfsMountPtr ifs, |
| StorageId storage, std::string_view path) { |
| const auto storageInfo = ifs->storages.find(storage); |
| if (storageInfo == ifs->storages.end()) { |
| return {}; |
| } |
| std::string normPath; |
| if (path::isAbsolute(path)) { |
| normPath = path::normalize(path); |
| } else { |
| normPath = path::normalize(path::join(storageInfo->second.name, path)); |
| } |
| if (!path::startsWith(normPath, storageInfo->second.name)) { |
| return {}; |
| } |
| return normPath; |
| } |
| |
| 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()) { |
| return -EINVAL; |
| } |
| auto err = mIncFs->makeFile(ifs->control, normPath, mode, id, params); |
| if (err) { |
| return err; |
| } |
| std::vector<uint8_t> metadataBytes; |
| if (params.metadata.data && params.metadata.size > 0) { |
| metadataBytes.assign(params.metadata.data, params.metadata.data + params.metadata.size); |
| } |
| 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) { |
| if (auto ifsSrc = getIfs(sourceStorageId), ifsDest = getIfs(destStorageId); |
| 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 { |
| { |
| std::unique_lock l(mLock); |
| const auto& ifs = getIfsLocked(storage); |
| if (!ifs) { |
| return false; |
| } |
| if (ifs->dataLoaderStatus != IDataLoaderStatusListener::DATA_LOADER_CREATED) { |
| ifs->dataLoaderStartRequested = true; |
| return true; |
| } |
| } |
| return startDataLoader(storage); |
| } |
| |
| bool IncrementalService::startDataLoader(MountId mountId) const { |
| sp<IDataLoader> dataloader; |
| auto status = mDataLoaderManager->getDataLoader(mountId, &dataloader); |
| if (!status.isOk()) { |
| return false; |
| } |
| if (!dataloader) { |
| return false; |
| } |
| status = dataloader->start(mountId); |
| if (!status.isOk()) { |
| return false; |
| } |
| return true; |
| } |
| |
| 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, name)) { |
| IncFsMount::cleanupFilesystem(path); |
| } |
| } |
| } |
| |
| bool IncrementalService::mountExistingImage(std::string_view root, std::string_view key) { |
| auto mountTarget = path::join(root, constants().mount); |
| const auto backing = path::join(root, constants().backing); |
| |
| IncFsMount::Control control; |
| IncrementalFileSystemControlParcel controlParcel; |
| auto status = mVold->mountIncFs(backing, mountTarget, 0, &controlParcel); |
| if (!status.isOk()) { |
| LOG(ERROR) << "Vold::mountIncFs() failed: " << status.toString8(); |
| return false; |
| } |
| control.cmd = controlParcel.cmd.release().release(); |
| control.pendingReads = controlParcel.pendingReads.release().release(); |
| control.logs = controlParcel.log.release().release(); |
| |
| auto ifs = std::make_shared<IncFsMount>(std::string(root), -1, std::move(control), *this); |
| |
| auto m = parseFromIncfs<metadata::Mount>(mIncFs.get(), ifs->control, |
| path::join(mountTarget, constants().infoMdName)); |
| if (!m.has_loader() || !m.has_storage()) { |
| LOG(ERROR) << "Bad mount metadata in mount at " << root; |
| return false; |
| } |
| |
| ifs->mountId = m.storage().id(); |
| mNextId = std::max(mNextId, ifs->mountId + 1); |
| |
| 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)) { |
| auto md = parseFromIncfs<metadata::Storage>(mIncFs.get(), ifs->control, |
| path::join(mountTarget, name)); |
| auto [_, inserted] = mMounts.try_emplace(md.id(), ifs); |
| if (!inserted) { |
| LOG(WARNING) << "Ignoring storage with duplicate id " << md.id() |
| << " for mount " << root; |
| continue; |
| } |
| ifs->storages.insert_or_assign(md.id(), IncFsMount::Storage{std::string(name)}); |
| mNextId = std::max(mNextId, md.id() + 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; |
| } |
| |
| bool IncrementalService::prepareDataLoader(IncrementalService::IncFsMount& ifs, |
| DataLoaderParamsParcel* params, |
| const DataLoaderStatusListener* externalListener) { |
| if (!mSystemReady.load(std::memory_order_relaxed)) { |
| std::unique_lock l(ifs.lock); |
| if (params) { |
| if (ifs.savedDataLoaderParams) { |
| LOG(WARNING) << "Trying to pass second set of data loader parameters, ignored it"; |
| } else { |
| ifs.savedDataLoaderParams = std::move(*params); |
| } |
| } else { |
| if (!ifs.savedDataLoaderParams) { |
| LOG(ERROR) << "Mount " << ifs.mountId |
| << " is broken: no data loader params (system is not ready yet)"; |
| return false; |
| } |
| } |
| return true; // eventually... |
| } |
| |
| std::unique_lock l(ifs.lock); |
| if (ifs.dataLoaderStatus != -1) { |
| LOG(INFO) << "Skipped data loader preparation because it already exists"; |
| return true; |
| } |
| |
| auto* dlp = params ? params |
| : ifs.savedDataLoaderParams ? &ifs.savedDataLoaderParams.value() : nullptr; |
| if (!dlp) { |
| LOG(ERROR) << "Mount " << ifs.mountId << " is broken: no data loader params"; |
| return false; |
| } |
| 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))); |
| sp<IncrementalDataLoaderListener> listener = |
| new IncrementalDataLoaderListener(*this, |
| externalListener ? *externalListener |
| : DataLoaderStatusListener()); |
| bool created = false; |
| auto status = mDataLoaderManager->initializeDataLoader(ifs.mountId, *dlp, fsControlParcel, |
| listener, &created); |
| if (!status.isOk() || !created) { |
| LOG(ERROR) << "Failed to create a data loader for mount " << ifs.mountId; |
| return false; |
| } |
| ifs.savedDataLoaderParams.reset(); |
| return true; |
| } |
| |
| // Extract lib filse 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) { |
| const auto ifs = getIfs(storage); |
| // 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; |
| } |
| |
| std::unique_ptr<ZipFileRO> zipFile(ZipFileRO::open(apkFullPath.data())); |
| if (!zipFile) { |
| LOG(ERROR) << "Failed to open zip file at " << apkFullPath; |
| return false; |
| } |
| void* cookie = nullptr; |
| const auto libFilePrefix = path::join(constants().libDir, abi); |
| if (!zipFile.get()->startIteration(&cookie, libFilePrefix.c_str() /* prefix */, |
| constants().libSuffix.data() /* suffix */)) { |
| LOG(ERROR) << "Failed to start zip iteration for " << apkFullPath; |
| return false; |
| } |
| ZipEntryRO entry = nullptr; |
| bool success = true; |
| while ((entry = zipFile.get()->nextEntry(cookie)) != nullptr) { |
| char fileName[PATH_MAX]; |
| if (zipFile.get()->getEntryFileName(entry, fileName, sizeof(fileName))) { |
| continue; |
| } |
| 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 |
| struct stat st; |
| if (stat(targetLibPathAbsolute.c_str(), &st) == 0) { |
| LOG(INFO) << "Native lib file already exists: " << targetLibPath |
| << "; skipping extraction"; |
| continue; |
| } |
| |
| uint32_t uncompressedLen; |
| if (!zipFile.get()->getEntryInfo(entry, nullptr, &uncompressedLen, nullptr, nullptr, |
| nullptr, nullptr)) { |
| LOG(ERROR) << "Failed to read native lib entry: " << fileName; |
| success = false; |
| break; |
| } |
| |
| // Create new lib file without signature info |
| incfs::NewFileParams libFileParams{}; |
| libFileParams.size = uncompressedLen; |
| libFileParams.signature = {}; |
| // Metadata of the new lib file is its relative path |
| IncFsSpan libFileMetadata; |
| libFileMetadata.data = targetLibPath.c_str(); |
| libFileMetadata.size = targetLibPath.size(); |
| libFileParams.metadata = libFileMetadata; |
| incfs::FileId libFileId = idFromMetadata(targetLibPath); |
| if (auto res = makeFile(storage, targetLibPath, 0777, libFileId, libFileParams)) { |
| LOG(ERROR) << "Failed to make file for: " << targetLibPath << " errno: " << res; |
| success = false; |
| // If one lib file fails to be created, abort others as well |
| break; |
| } |
| // If it is a zero-byte file, skip data writing |
| if (uncompressedLen == 0) { |
| continue; |
| } |
| |
| // Write extracted data to new file |
| std::vector<uint8_t> libData(uncompressedLen); |
| if (!zipFile.get()->uncompressEntry(entry, &libData[0], uncompressedLen)) { |
| LOG(ERROR) << "Failed to extract native lib zip entry: " << fileName; |
| success = false; |
| break; |
| } |
| android::base::unique_fd writeFd(mIncFs->openWrite(ifs->control, libFileId)); |
| if (writeFd < 0) { |
| LOG(ERROR) << "Failed to open write fd for: " << targetLibPath << " errno: " << writeFd; |
| success = false; |
| break; |
| } |
| const int numBlocks = uncompressedLen / constants().blockSize + 1; |
| std::vector<IncFsDataBlock> instructions; |
| auto remainingData = std::span(libData); |
| for (int i = 0; i < numBlocks - 1; i++) { |
| auto inst = IncFsDataBlock{ |
| .fileFd = writeFd, |
| .pageIndex = static_cast<IncFsBlockIndex>(i), |
| .compression = INCFS_COMPRESSION_KIND_NONE, |
| .kind = INCFS_BLOCK_KIND_DATA, |
| .dataSize = static_cast<uint16_t>(constants().blockSize), |
| .data = reinterpret_cast<const char*>(remainingData.data()), |
| }; |
| instructions.push_back(inst); |
| remainingData = remainingData.subspan(constants().blockSize); |
| } |
| // Last block |
| auto inst = IncFsDataBlock{ |
| .fileFd = writeFd, |
| .pageIndex = static_cast<IncFsBlockIndex>(numBlocks - 1), |
| .compression = INCFS_COMPRESSION_KIND_NONE, |
| .kind = INCFS_BLOCK_KIND_DATA, |
| .dataSize = static_cast<uint16_t>(remainingData.size()), |
| .data = reinterpret_cast<const char*>(remainingData.data()), |
| }; |
| instructions.push_back(inst); |
| size_t res = mIncFs->writeBlocks(instructions); |
| if (res != instructions.size()) { |
| LOG(ERROR) << "Failed to write data into: " << targetLibPath; |
| success = false; |
| } |
| instructions.clear(); |
| } |
| zipFile.get()->endIteration(cookie); |
| return success; |
| } |
| |
| binder::Status IncrementalService::IncrementalDataLoaderListener::onStatusChanged(MountId mountId, |
| int newStatus) { |
| if (externalListener) { |
| // Give an external listener a chance to act before we destroy something. |
| externalListener->onStatusChanged(mountId, newStatus); |
| } |
| |
| bool startRequested = false; |
| { |
| std::unique_lock l(incrementalService.mLock); |
| const auto& ifs = incrementalService.getIfsLocked(mountId); |
| if (!ifs) { |
| LOG(WARNING) << "Received data loader status " << int(newStatus) |
| << " for unknown mount " << mountId; |
| return binder::Status::ok(); |
| } |
| ifs->dataLoaderStatus = newStatus; |
| |
| if (newStatus == IDataLoaderStatusListener::DATA_LOADER_DESTROYED) { |
| ifs->dataLoaderStatus = IDataLoaderStatusListener::DATA_LOADER_STOPPED; |
| incrementalService.deleteStorageLocked(*ifs, std::move(l)); |
| return binder::Status::ok(); |
| } |
| |
| startRequested = ifs->dataLoaderStartRequested; |
| } |
| |
| switch (newStatus) { |
| case IDataLoaderStatusListener::DATA_LOADER_CREATED: { |
| if (startRequested) { |
| incrementalService.startDataLoader(mountId); |
| } |
| break; |
| } |
| case IDataLoaderStatusListener::DATA_LOADER_DESTROYED: { |
| 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(); |
| } |
| |
| } // namespace android::incremental |