| /* |
| * 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. |
| */ |
| |
| #include "BinderIncrementalService.h" |
| |
| #include <android-base/logging.h> |
| #include <binder/IResultReceiver.h> |
| #include <binder/PermissionCache.h> |
| #include <incfs.h> |
| |
| #include "ServiceWrappers.h" |
| #include "jni.h" |
| #include "nativehelper/JNIHelp.h" |
| #include "path.h" |
| |
| using namespace std::literals; |
| using namespace android::incremental; |
| |
| namespace android::os::incremental { |
| |
| static constexpr auto kAndroidDataEnv = "ANDROID_DATA"sv; |
| static constexpr auto kDataDir = "/data"sv; |
| static constexpr auto kIncrementalSubDir = "incremental"sv; |
| |
| static std::string getIncrementalDir() { |
| const char* dataDir = getenv(kAndroidDataEnv.data()); |
| if (!dataDir || !*dataDir) { |
| dataDir = kDataDir.data(); |
| } |
| return path::normalize(path::join(dataDir, kIncrementalSubDir)); |
| } |
| |
| static bool incFsEnabled() { |
| // TODO(b/136132412): use vold to check /sys/fs/incfs/version (per selinux compliance) |
| return incfs::enabled(); |
| } |
| |
| static bool incFsValid(const sp<IVold>& vold) { |
| bool enabled = false; |
| auto status = vold->incFsEnabled(&enabled); |
| if (!status.isOk() || !enabled) { |
| return false; |
| } |
| return true; |
| } |
| |
| BinderIncrementalService::BinderIncrementalService(const sp<IServiceManager>& sm) |
| : mImpl(RealServiceManager(sm), getIncrementalDir()) {} |
| |
| BinderIncrementalService* BinderIncrementalService::start() { |
| if (!incFsEnabled()) { |
| return nullptr; |
| } |
| |
| IPCThreadState::self()->disableBackgroundScheduling(true); |
| sp<IServiceManager> sm(defaultServiceManager()); |
| if (!sm) { |
| return nullptr; |
| } |
| |
| sp<IBinder> voldBinder(sm->getService(String16("vold"))); |
| if (voldBinder == nullptr) { |
| return nullptr; |
| } |
| sp<IVold> vold = interface_cast<IVold>(voldBinder); |
| if (!incFsValid(vold)) { |
| return nullptr; |
| } |
| |
| sp<BinderIncrementalService> self(new BinderIncrementalService(sm)); |
| status_t ret = sm->addService(String16{getServiceName()}, self); |
| if (ret != android::OK) { |
| return nullptr; |
| } |
| sp<ProcessState> ps(ProcessState::self()); |
| ps->startThreadPool(); |
| ps->giveThreadPoolName(); |
| // sm->addService increments the reference count, and now we're OK with returning the pointer. |
| return self.get(); |
| } |
| |
| status_t BinderIncrementalService::dump(int fd, const Vector<String16>&) { |
| static const String16 kDump("android.permission.DUMP"); |
| if (!PermissionCache::checkCallingPermission(kDump)) { |
| return PERMISSION_DENIED; |
| } |
| mImpl.onDump(fd); |
| return NO_ERROR; |
| } |
| |
| void BinderIncrementalService::onSystemReady() { |
| mImpl.onSystemReady(); |
| } |
| |
| static binder::Status ok() { |
| return binder::Status::ok(); |
| } |
| |
| binder::Status BinderIncrementalService::openStorage(const std::string& path, |
| int32_t* _aidl_return) { |
| *_aidl_return = mImpl.openStorage(path); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::createStorage(const std::string& path, |
| const DataLoaderParamsParcel& params, |
| const ::android::sp<::android::content::pm::IDataLoaderStatusListener>& listener, |
| int32_t createMode, int32_t* _aidl_return) { |
| *_aidl_return = mImpl.createStorage(path, const_cast<DataLoaderParamsParcel&&>(params), listener, android::incremental::IncrementalService::CreateOptions(createMode)); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::createLinkedStorage(const std::string& path, |
| int32_t otherStorageId, |
| int32_t createMode, |
| int32_t* _aidl_return) { |
| *_aidl_return = |
| mImpl.createLinkedStorage(path, otherStorageId, |
| android::incremental::IncrementalService::CreateOptions( |
| createMode)); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::makeBindMount(int32_t storageId, |
| const std::string& sourcePath, |
| const std::string& targetFullPath, |
| int32_t bindType, int32_t* _aidl_return) { |
| *_aidl_return = mImpl.bind(storageId, sourcePath, targetFullPath, |
| android::incremental::IncrementalService::BindKind(bindType)); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::deleteBindMount(int32_t storageId, |
| const std::string& targetFullPath, |
| int32_t* _aidl_return) { |
| *_aidl_return = mImpl.unbind(storageId, targetFullPath); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::deleteStorage(int32_t storageId) { |
| mImpl.deleteStorage(storageId); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::makeDirectory(int32_t storageId, const std::string& path, |
| int32_t* _aidl_return) { |
| *_aidl_return = mImpl.makeDir(storageId, path); |
| return ok(); |
| } |
| |
| static std::tuple<int, incfs::FileId, incfs::NewFileParams> toMakeFileParams( |
| const android::os::incremental::IncrementalNewFileParams& params) { |
| incfs::FileId id; |
| if (params.fileId.empty()) { |
| if (params.metadata.empty()) { |
| return {EINVAL, {}, {}}; |
| } |
| id = IncrementalService::idFromMetadata(params.metadata); |
| } else if (params.fileId.size() != sizeof(id)) { |
| return {EINVAL, {}, {}}; |
| } else { |
| memcpy(&id, params.fileId.data(), sizeof(id)); |
| } |
| incfs::NewFileParams nfp; |
| nfp.size = params.size; |
| nfp.metadata = {(const char*)params.metadata.data(), (IncFsSize)params.metadata.size()}; |
| if (!params.signature) { |
| nfp.verification = {}; |
| } else { |
| nfp.verification.hashAlgorithm = IncFsHashAlgortithm(params.signature->hashAlgorithm); |
| nfp.verification.rootHash = {(const char*)params.signature->rootHash.data(), |
| (IncFsSize)params.signature->rootHash.size()}; |
| nfp.verification.additionalData = {(const char*)params.signature->additionalData.data(), |
| (IncFsSize)params.signature->additionalData.size()}; |
| nfp.verification.signature = {(const char*)params.signature->signature.data(), |
| (IncFsSize)params.signature->signature.size()}; |
| } |
| return {0, id, nfp}; |
| } |
| |
| binder::Status BinderIncrementalService::makeFile( |
| int32_t storageId, const std::string& path, |
| const ::android::os::incremental::IncrementalNewFileParams& params, int32_t* _aidl_return) { |
| auto [err, fileId, nfp] = toMakeFileParams(params); |
| if (err) { |
| *_aidl_return = err; |
| return ok(); |
| } |
| |
| *_aidl_return = mImpl.makeFile(storageId, path, 0777, fileId, nfp); |
| return ok(); |
| } |
| binder::Status BinderIncrementalService::makeFileFromRange(int32_t storageId, |
| const std::string& targetPath, |
| const std::string& sourcePath, |
| int64_t start, int64_t end, |
| int32_t* _aidl_return) { |
| // TODO(b/136132412): implement this |
| *_aidl_return = ENOSYS; // not implemented |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::makeLink(int32_t sourceStorageId, |
| const std::string& sourcePath, |
| int32_t destStorageId, |
| const std::string& destPath, |
| int32_t* _aidl_return) { |
| *_aidl_return = mImpl.link(sourceStorageId, sourcePath, destStorageId, destPath); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::unlink(int32_t storageId, const std::string& path, |
| int32_t* _aidl_return) { |
| *_aidl_return = mImpl.unlink(storageId, path); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::isFileRangeLoaded(int32_t storageId, |
| const std::string& path, int64_t start, |
| int64_t end, bool* _aidl_return) { |
| // TODO: implement |
| *_aidl_return = false; |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::getMetadataByPath(int32_t storageId, |
| const std::string& path, |
| std::vector<uint8_t>* _aidl_return) { |
| auto fid = mImpl.nodeFor(storageId, path); |
| if (fid != kIncFsInvalidFileId) { |
| auto metadata = mImpl.getMetadata(storageId, fid); |
| _aidl_return->assign(metadata.begin(), metadata.end()); |
| } |
| return ok(); |
| } |
| |
| static FileId toFileId(const std::vector<uint8_t>& id) { |
| FileId fid; |
| memcpy(&fid, id.data(), id.size()); |
| return fid; |
| } |
| |
| binder::Status BinderIncrementalService::getMetadataById(int32_t storageId, |
| const std::vector<uint8_t>& id, |
| std::vector<uint8_t>* _aidl_return) { |
| if (id.size() != sizeof(incfs::FileId)) { |
| return ok(); |
| } |
| auto fid = toFileId(id); |
| auto metadata = mImpl.getMetadata(storageId, fid); |
| _aidl_return->assign(metadata.begin(), metadata.end()); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::makeDirectories(int32_t storageId, const std::string& path, |
| int32_t* _aidl_return) { |
| *_aidl_return = mImpl.makeDirs(storageId, path); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::startLoading(int32_t storageId, bool* _aidl_return) { |
| *_aidl_return = mImpl.startLoading(storageId); |
| return ok(); |
| } |
| |
| binder::Status BinderIncrementalService::configureNativeBinaries( |
| int32_t storageId, const std::string& apkFullPath, const std::string& libDirRelativePath, |
| const std::string& abi, bool* _aidl_return) { |
| *_aidl_return = mImpl.configureNativeBinaries(storageId, apkFullPath, libDirRelativePath, abi); |
| return ok(); |
| } |
| |
| } // namespace android::os::incremental |
| |
| jlong Incremental_IncrementalService_Start() { |
| return (jlong)android::os::incremental::BinderIncrementalService::start(); |
| } |
| void Incremental_IncrementalService_OnSystemReady(jlong self) { |
| if (self) { |
| ((android::os::incremental::BinderIncrementalService*)self)->onSystemReady(); |
| } |
| } |
| void Incremental_IncrementalService_OnDump(jlong self, jint fd) { |
| if (self) { |
| ((android::os::incremental::BinderIncrementalService*)self)->dump(fd, {}); |
| } else { |
| dprintf(fd, "BinderIncrementalService is stopped."); |
| } |
| } |
