[incremental] native implementation of Incremental Service

The implementation of IIncrementalManager.aidl. TODO to refactor this.

Test: atest service.incremental_test
Change-Id: Ib8c8a9c0e7f0289b4bcd8961fa39746ed12b4310

1 files changed, 230 insertions, 0 deletions

diff --git a/services/incremental/BinderIncrementalService.cpp b/services/incremental/BinderIncrementalService.cpp
new file mode 100644
index 000000000000..bb26c1f93159
--- /dev/null
+++ b/services/incremental/BinderIncrementalService.cpp
@@ -0,0 +1,230 @@
+/*
+ * 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 <binder/IResultReceiver.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 incFsVersionValid(const sp<IVold>& vold) {
+    int version = -1;
+    auto status = vold->incFsVersion(&version);
+    if (!status.isOk() || version <= 0) {
+        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 (!incFsVersionValid(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();
+    return self.get();
+}
+
+status_t BinderIncrementalService::dump(int fd, const Vector<String16>& args) {
+    return OK;
+}
+
+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,
+        int32_t createMode, int32_t* _aidl_return) {
+    *_aidl_return =
+            mImpl.createStorage(path, const_cast<DataLoaderParamsParcel&&>(params),
+                                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& pathUnderStorage,
+                                                       const std::string& targetFullPath,
+                                                       int32_t bindType, int32_t* _aidl_return) {
+    *_aidl_return = mImpl.bind(storageId, pathUnderStorage, 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& pathUnderStorage,
+                                                       int32_t* _aidl_return) {
+    auto inode = mImpl.makeDir(storageId, pathUnderStorage);
+    *_aidl_return = inode < 0 ? inode : 0;
+    return ok();
+}
+
+binder::Status BinderIncrementalService::makeDirectories(int32_t storageId,
+                                                         const std::string& pathUnderStorage,
+                                                         int32_t* _aidl_return) {
+    auto inode = mImpl.makeDirs(storageId, pathUnderStorage);
+    *_aidl_return = inode < 0 ? inode : 0;
+    return ok();
+}
+
+binder::Status BinderIncrementalService::makeFile(int32_t storageId,
+                                                  const std::string& pathUnderStorage, int64_t size,
+                                                  const std::vector<uint8_t>& metadata,
+                                                  int32_t* _aidl_return) {
+    auto inode = mImpl.makeFile(storageId, pathUnderStorage, size,
+                                {(const char*)metadata.data(), metadata.size()}, {});
+    *_aidl_return = inode < 0 ? inode : 0;
+    return ok();
+}
+binder::Status BinderIncrementalService::makeFileFromRange(
+        int32_t storageId, const std::string& pathUnderStorage,
+        const std::string& sourcePathUnderStorage, int64_t start, int64_t end,
+        int32_t* _aidl_return) {
+    // TODO(b/136132412): implement this
+    *_aidl_return = -1;
+    return ok();
+}
+binder::Status BinderIncrementalService::makeLink(int32_t sourceStorageId,
+                                                  const std::string& relativeSourcePath,
+                                                  int32_t destStorageId,
+                                                  const std::string& relativeDestPath,
+                                                  int32_t* _aidl_return) {
+    auto sourceInode = mImpl.nodeFor(sourceStorageId, relativeSourcePath);
+    auto [targetParentInode, name] = mImpl.parentAndNameFor(destStorageId, relativeDestPath);
+    *_aidl_return = mImpl.link(sourceStorageId, sourceInode, targetParentInode, name);
+    return ok();
+}
+binder::Status BinderIncrementalService::unlink(int32_t storageId,
+                                                const std::string& pathUnderStorage,
+                                                int32_t* _aidl_return) {
+    auto [parentNode, name] = mImpl.parentAndNameFor(storageId, pathUnderStorage);
+    *_aidl_return = mImpl.unlink(storageId, parentNode, name);
+    return ok();
+}
+binder::Status BinderIncrementalService::isFileRangeLoaded(int32_t storageId,
+                                                           const std::string& relativePath,
+                                                           int64_t start, int64_t end,
+                                                           bool* _aidl_return) {
+    *_aidl_return = false;
+    return ok();
+}
+binder::Status BinderIncrementalService::getFileMetadata(int32_t storageId,
+                                                         const std::string& relativePath,
+                                                         std::vector<uint8_t>* _aidl_return) {
+    auto inode = mImpl.nodeFor(storageId, relativePath);
+    auto metadata = mImpl.getMetadata(storageId, inode);
+    _aidl_return->assign(metadata.begin(), metadata.end());
+    return ok();
+}
+binder::Status BinderIncrementalService::startLoading(int32_t storageId, bool* _aidl_return) {
+    *_aidl_return = mImpl.startLoading(storageId);
+    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();
+    }
+}