235 lines
10 KiB
C++
235 lines
10 KiB
C++
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specic language governing permissions and
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* limitations under the License.
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*/
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// Need to use LOGE_EX.
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#define LOG_TAG "FuseDaemonJNI"
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#include <nativehelper/scoped_local_ref.h>
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#include <nativehelper/scoped_utf_chars.h>
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#include <string>
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#include "FuseDaemon.h"
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#include "MediaProviderWrapper.h"
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#include "android-base/logging.h"
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#include "android-base/unique_fd.h"
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namespace mediaprovider {
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namespace {
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constexpr const char* FUSE_DAEMON_CLASS_NAME = "com/android/providers/media/fuse/FuseDaemon";
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constexpr const char* FD_ACCESS_RESULT_CLASS_NAME = "com/android/providers/media/FdAccessResult";
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static jclass gFuseDaemonClass;
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static jclass gFdAccessResultClass;
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static jmethodID gFdAccessResultCtor;
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static std::vector<std::string> convert_object_array_to_string_vector(
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JNIEnv* env, jobjectArray java_object_array, const std::string& element_description) {
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ScopedLocalRef<jobjectArray> j_ref_object_array(env, java_object_array);
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std::vector<std::string> utf_strings;
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const int object_array_length = env->GetArrayLength(j_ref_object_array.get());
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for (int i = 0; i < object_array_length; i++) {
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ScopedLocalRef<jstring> j_ref_string(
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env, (jstring)env->GetObjectArrayElement(j_ref_object_array.get(), i));
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ScopedUtfChars utf_chars(env, j_ref_string.get());
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const char* utf_string = utf_chars.c_str();
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if (utf_string) {
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utf_strings.push_back(utf_string);
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} else {
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LOG(ERROR) << "Error reading " << element_description << " at index: " << i;
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}
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}
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return utf_strings;
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}
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static std::vector<std::string> get_supported_transcoding_relative_paths(
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JNIEnv* env, jobjectArray java_supported_transcoding_relative_paths) {
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return convert_object_array_to_string_vector(env, java_supported_transcoding_relative_paths,
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"supported transcoding relative path");
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}
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static std::vector<std::string> get_supported_uncached_relative_paths(
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JNIEnv* env, jobjectArray java_supported_uncached_relative_paths) {
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return convert_object_array_to_string_vector(env, java_supported_uncached_relative_paths,
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"supported uncached relative path");
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}
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jlong com_android_providers_media_FuseDaemon_new(JNIEnv* env, jobject self,
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jobject media_provider) {
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LOG(DEBUG) << "Creating the FUSE daemon...";
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return reinterpret_cast<jlong>(new fuse::FuseDaemon(env, media_provider));
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}
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void com_android_providers_media_FuseDaemon_start(
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JNIEnv* env, jobject self, jlong java_daemon, jint fd, jstring java_path,
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jboolean uncached_mode, jobjectArray java_supported_transcoding_relative_paths,
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jobjectArray java_supported_uncached_relative_paths) {
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LOG(DEBUG) << "Starting the FUSE daemon...";
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fuse::FuseDaemon* const daemon = reinterpret_cast<fuse::FuseDaemon*>(java_daemon);
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android::base::unique_fd ufd(fd);
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ScopedUtfChars utf_chars_path(env, java_path);
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if (!utf_chars_path.c_str()) {
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return;
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}
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const std::vector<std::string>& transcoding_relative_paths =
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get_supported_transcoding_relative_paths(env,
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java_supported_transcoding_relative_paths);
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const std::vector<std::string>& uncached_relative_paths =
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get_supported_uncached_relative_paths(env, java_supported_uncached_relative_paths);
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daemon->Start(std::move(ufd), utf_chars_path.c_str(), uncached_mode, transcoding_relative_paths,
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uncached_relative_paths);
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}
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bool com_android_providers_media_FuseDaemon_is_started(JNIEnv* env, jobject self,
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jlong java_daemon) {
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LOG(DEBUG) << "Checking if FUSE daemon started...";
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const fuse::FuseDaemon* daemon = reinterpret_cast<fuse::FuseDaemon*>(java_daemon);
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return daemon->IsStarted();
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}
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void com_android_providers_media_FuseDaemon_delete(JNIEnv* env, jobject self, jlong java_daemon) {
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LOG(DEBUG) << "Destroying the FUSE daemon...";
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fuse::FuseDaemon* const daemon = reinterpret_cast<fuse::FuseDaemon*>(java_daemon);
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delete daemon;
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}
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jboolean com_android_providers_media_FuseDaemon_should_open_with_fuse(JNIEnv* env, jobject self,
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jlong java_daemon,
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jstring java_path,
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jboolean for_read, jint fd) {
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fuse::FuseDaemon* const daemon = reinterpret_cast<fuse::FuseDaemon*>(java_daemon);
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if (daemon) {
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ScopedUtfChars utf_chars_path(env, java_path);
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if (!utf_chars_path.c_str()) {
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// TODO(b/145741852): Throw exception
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return JNI_FALSE;
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}
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return daemon->ShouldOpenWithFuse(fd, for_read, utf_chars_path.c_str());
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}
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// TODO(b/145741852): Throw exception
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return JNI_FALSE;
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}
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jboolean com_android_providers_media_FuseDaemon_uses_fuse_passthrough(JNIEnv* env, jobject self,
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jlong java_daemon) {
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fuse::FuseDaemon* const daemon = reinterpret_cast<fuse::FuseDaemon*>(java_daemon);
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if (daemon) {
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return daemon->UsesFusePassthrough();
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}
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return JNI_FALSE;
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}
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void com_android_providers_media_FuseDaemon_invalidate_fuse_dentry_cache(JNIEnv* env, jobject self,
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jlong java_daemon,
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jstring java_path) {
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fuse::FuseDaemon* const daemon = reinterpret_cast<fuse::FuseDaemon*>(java_daemon);
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if (daemon) {
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ScopedUtfChars utf_chars_path(env, java_path);
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if (!utf_chars_path.c_str()) {
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// TODO(b/145741152): Throw exception
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return;
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}
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CHECK(pthread_getspecific(fuse::MediaProviderWrapper::gJniEnvKey) == nullptr);
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daemon->InvalidateFuseDentryCache(utf_chars_path.c_str());
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}
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// TODO(b/145741152): Throw exception
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}
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jobject com_android_providers_media_FuseDaemon_check_fd_access(JNIEnv* env, jobject self,
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jlong java_daemon, jint fd,
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jint uid) {
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fuse::FuseDaemon* const daemon = reinterpret_cast<fuse::FuseDaemon*>(java_daemon);
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const std::unique_ptr<fuse::FdAccessResult> result = daemon->CheckFdAccess(fd, uid);
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return env->NewObject(gFdAccessResultClass, gFdAccessResultCtor,
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env->NewStringUTF(result->file_path.c_str()), result->should_redact);
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}
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void com_android_providers_media_FuseDaemon_initialize_device_id(JNIEnv* env, jobject self,
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jlong java_daemon,
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jstring java_path) {
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fuse::FuseDaemon* const daemon = reinterpret_cast<fuse::FuseDaemon*>(java_daemon);
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ScopedUtfChars utf_chars_path(env, java_path);
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if (!utf_chars_path.c_str()) {
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LOG(WARNING) << "Couldn't initialise FUSE device id";
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return;
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}
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daemon->InitializeDeviceId(utf_chars_path.c_str());
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}
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bool com_android_providers_media_FuseDaemon_is_fuse_thread(JNIEnv* env, jclass clazz) {
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return pthread_getspecific(fuse::MediaProviderWrapper::gJniEnvKey) != nullptr;
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}
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const JNINativeMethod methods[] = {
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{"native_new", "(Lcom/android/providers/media/MediaProvider;)J",
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reinterpret_cast<void*>(com_android_providers_media_FuseDaemon_new)},
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{"native_start", "(JILjava/lang/String;Z[Ljava/lang/String;[Ljava/lang/String;)V",
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reinterpret_cast<void*>(com_android_providers_media_FuseDaemon_start)},
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{"native_delete", "(J)V",
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reinterpret_cast<void*>(com_android_providers_media_FuseDaemon_delete)},
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{"native_should_open_with_fuse", "(JLjava/lang/String;ZI)Z",
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reinterpret_cast<void*>(com_android_providers_media_FuseDaemon_should_open_with_fuse)},
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{"native_uses_fuse_passthrough", "(J)Z",
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reinterpret_cast<void*>(com_android_providers_media_FuseDaemon_uses_fuse_passthrough)},
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{"native_is_fuse_thread", "()Z",
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reinterpret_cast<void*>(com_android_providers_media_FuseDaemon_is_fuse_thread)},
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{"native_is_started", "(J)Z",
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reinterpret_cast<void*>(com_android_providers_media_FuseDaemon_is_started)},
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{"native_invalidate_fuse_dentry_cache", "(JLjava/lang/String;)V",
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reinterpret_cast<void*>(
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com_android_providers_media_FuseDaemon_invalidate_fuse_dentry_cache)},
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{"native_check_fd_access", "(JII)Lcom/android/providers/media/FdAccessResult;",
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reinterpret_cast<void*>(com_android_providers_media_FuseDaemon_check_fd_access)},
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{"native_initialize_device_id", "(JLjava/lang/String;)V",
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reinterpret_cast<void*>(com_android_providers_media_FuseDaemon_initialize_device_id)}};
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} // namespace
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void register_android_providers_media_FuseDaemon(JavaVM* vm, JNIEnv* env) {
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gFuseDaemonClass =
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static_cast<jclass>(env->NewGlobalRef(env->FindClass(FUSE_DAEMON_CLASS_NAME)));
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gFdAccessResultClass =
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static_cast<jclass>(env->NewGlobalRef(env->FindClass(FD_ACCESS_RESULT_CLASS_NAME)));
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if (gFuseDaemonClass == nullptr) {
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LOG(FATAL) << "Unable to find class : " << FUSE_DAEMON_CLASS_NAME;
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}
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if (gFdAccessResultClass == nullptr) {
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LOG(FATAL) << "Unable to find class : " << FD_ACCESS_RESULT_CLASS_NAME;
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}
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if (env->RegisterNatives(gFuseDaemonClass, methods, sizeof(methods) / sizeof(methods[0])) < 0) {
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LOG(FATAL) << "Unable to register native methods";
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}
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gFdAccessResultCtor = env->GetMethodID(gFdAccessResultClass, "<init>", "(Ljava/lang/String;Z)V");
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if (gFdAccessResultCtor == nullptr) {
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LOG(FATAL) << "Unable to find ctor for FdAccessResult";
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}
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fuse::MediaProviderWrapper::OneTimeInit(vm);
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}
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} // namespace mediaprovider
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