Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "FuseAppLoopJNI" |
| 18 | #define LOG_NDEBUG 0 |
| 19 | |
| 20 | #include <stdlib.h> |
| 21 | #include <sys/stat.h> |
| 22 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 23 | #include <map> |
| 24 | #include <memory> |
| 25 | |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 26 | #include <android_runtime/Log.h> |
| 27 | #include <android-base/logging.h> |
| 28 | #include <android-base/unique_fd.h> |
| 29 | #include <jni.h> |
| 30 | #include <libappfuse/FuseAppLoop.h> |
| 31 | #include <nativehelper/ScopedLocalRef.h> |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 32 | #include <nativehelper/ScopedPrimitiveArray.h> |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 33 | |
| 34 | #include "core_jni_helpers.h" |
| 35 | |
| 36 | namespace android { |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 37 | namespace { |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 38 | constexpr const char* CLASS_NAME = "com/android/internal/os/FuseAppLoop"; |
| 39 | |
| 40 | jclass gFuseAppLoopClass; |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 41 | jmethodID gOnCommandMethod; |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 42 | jmethodID gOnOpenMethod; |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 43 | |
| 44 | class Callback : public fuse::FuseAppLoopCallback { |
| 45 | private: |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 46 | typedef ScopedLocalRef<jbyteArray> LocalBytes; |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 47 | JNIEnv* const mEnv; |
| 48 | jobject const mSelf; |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 49 | std::map<uint64_t, std::unique_ptr<LocalBytes>> mBuffers; |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 50 | |
| 51 | public: |
| 52 | Callback(JNIEnv* env, jobject self) : |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 53 | mEnv(env), mSelf(self) {} |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 54 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 55 | void OnLookup(uint64_t unique, uint64_t inode) override { |
Daichi Hirono | 77a97cd | 2017-03-30 11:06:49 +0900 | [diff] [blame] | 56 | CallOnCommand(FUSE_LOOKUP, unique, inode, 0, 0, nullptr); |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 57 | } |
| 58 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 59 | void OnGetAttr(uint64_t unique, uint64_t inode) override { |
Daichi Hirono | 77a97cd | 2017-03-30 11:06:49 +0900 | [diff] [blame] | 60 | CallOnCommand(FUSE_GETATTR, unique, inode, 0, 0, nullptr); |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 61 | } |
| 62 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 63 | void OnOpen(uint64_t unique, uint64_t inode) override { |
| 64 | const jbyteArray buffer = static_cast<jbyteArray>(mEnv->CallObjectMethod( |
| 65 | mSelf, gOnOpenMethod, unique, inode)); |
| 66 | CHECK(!mEnv->ExceptionCheck()); |
| 67 | if (buffer == nullptr) { |
| 68 | return; |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 69 | } |
| 70 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 71 | mBuffers.insert(std::make_pair(inode, std::unique_ptr<LocalBytes>( |
| 72 | new LocalBytes(mEnv, buffer)))); |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 73 | } |
| 74 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 75 | void OnFsync(uint64_t unique, uint64_t inode) override { |
Daichi Hirono | 77a97cd | 2017-03-30 11:06:49 +0900 | [diff] [blame] | 76 | CallOnCommand(FUSE_FSYNC, unique, inode, 0, 0, nullptr); |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 77 | } |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 78 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 79 | void OnRelease(uint64_t unique, uint64_t inode) override { |
| 80 | mBuffers.erase(inode); |
Daichi Hirono | 77a97cd | 2017-03-30 11:06:49 +0900 | [diff] [blame] | 81 | CallOnCommand(FUSE_RELEASE, unique, inode, 0, 0, nullptr); |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | void OnRead(uint64_t unique, uint64_t inode, uint64_t offset, uint32_t size) override { |
| 85 | CHECK_LE(size, static_cast<uint32_t>(fuse::kFuseMaxRead)); |
| 86 | |
| 87 | auto it = mBuffers.find(inode); |
| 88 | CHECK(it != mBuffers.end()); |
| 89 | |
Daichi Hirono | 77a97cd | 2017-03-30 11:06:49 +0900 | [diff] [blame] | 90 | CallOnCommand(FUSE_READ, unique, inode, offset, size, it->second->get()); |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | void OnWrite(uint64_t unique, uint64_t inode, uint64_t offset, uint32_t size, |
| 94 | const void* buffer) override { |
| 95 | CHECK_LE(size, static_cast<uint32_t>(fuse::kFuseMaxWrite)); |
| 96 | |
| 97 | auto it = mBuffers.find(inode); |
| 98 | CHECK(it != mBuffers.end()); |
| 99 | |
| 100 | jbyteArray const javaBuffer = it->second->get(); |
| 101 | |
| 102 | mEnv->SetByteArrayRegion(javaBuffer, 0, size, static_cast<const jbyte*>(buffer)); |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 103 | CHECK(!mEnv->ExceptionCheck()); |
| 104 | |
Daichi Hirono | 77a97cd | 2017-03-30 11:06:49 +0900 | [diff] [blame] | 105 | CallOnCommand(FUSE_WRITE, unique, inode, offset, size, javaBuffer); |
| 106 | } |
| 107 | |
| 108 | private: |
| 109 | // Helper function to make sure we invoke CallVoidMethod with correct size of integer arguments. |
| 110 | void CallOnCommand(jint command, jlong unique, jlong inode, jlong offset, jint size, |
| 111 | jobject bytes) { |
| 112 | mEnv->CallVoidMethod(mSelf, gOnCommandMethod, command, unique, inode, offset, size, bytes); |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 113 | CHECK(!mEnv->ExceptionCheck()); |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 114 | } |
| 115 | }; |
| 116 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 117 | jlong com_android_internal_os_FuseAppLoop_new(JNIEnv* env, jobject self, jint jfd) { |
| 118 | return reinterpret_cast<jlong>(new fuse::FuseAppLoop(base::unique_fd(jfd))); |
| 119 | } |
| 120 | |
| 121 | void com_android_internal_os_FuseAppLoop_delete(JNIEnv* env, jobject self, jlong ptr) { |
| 122 | delete reinterpret_cast<fuse::FuseAppLoop*>(ptr); |
| 123 | } |
| 124 | |
| 125 | void com_android_internal_os_FuseAppLoop_start(JNIEnv* env, jobject self, jlong ptr) { |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 126 | Callback callback(env, self); |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 127 | reinterpret_cast<fuse::FuseAppLoop*>(ptr)->Start(&callback); |
| 128 | } |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 129 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 130 | void com_android_internal_os_FuseAppLoop_replySimple( |
| 131 | JNIEnv* env, jobject self, jlong ptr, jlong unique, jint result) { |
| 132 | if (!reinterpret_cast<fuse::FuseAppLoop*>(ptr)->ReplySimple(unique, result)) { |
| 133 | reinterpret_cast<fuse::FuseAppLoop*>(ptr)->Break(); |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 134 | } |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 135 | } |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 136 | |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 137 | void com_android_internal_os_FuseAppLoop_replyOpen( |
| 138 | JNIEnv* env, jobject self, jlong ptr, jlong unique, jlong fh) { |
| 139 | if (!reinterpret_cast<fuse::FuseAppLoop*>(ptr)->ReplyOpen(unique, fh)) { |
| 140 | reinterpret_cast<fuse::FuseAppLoop*>(ptr)->Break(); |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | void com_android_internal_os_FuseAppLoop_replyLookup( |
Daichi Hirono | d2229a6 | 2017-07-11 11:18:34 +0900 | [diff] [blame] | 145 | JNIEnv* env, jobject self, jlong ptr, jlong unique, jlong inode, jlong size) { |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 146 | if (!reinterpret_cast<fuse::FuseAppLoop*>(ptr)->ReplyLookup(unique, inode, size)) { |
| 147 | reinterpret_cast<fuse::FuseAppLoop*>(ptr)->Break(); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | void com_android_internal_os_FuseAppLoop_replyGetAttr( |
Daichi Hirono | d2229a6 | 2017-07-11 11:18:34 +0900 | [diff] [blame] | 152 | JNIEnv* env, jobject self, jlong ptr, jlong unique, jlong inode, jlong size) { |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 153 | if (!reinterpret_cast<fuse::FuseAppLoop*>(ptr)->ReplyGetAttr( |
| 154 | unique, inode, size, S_IFREG | 0777)) { |
| 155 | reinterpret_cast<fuse::FuseAppLoop*>(ptr)->Break(); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | void com_android_internal_os_FuseAppLoop_replyWrite( |
| 160 | JNIEnv* env, jobject self, jlong ptr, jlong unique, jint size) { |
| 161 | if (!reinterpret_cast<fuse::FuseAppLoop*>(ptr)->ReplyWrite(unique, size)) { |
| 162 | reinterpret_cast<fuse::FuseAppLoop*>(ptr)->Break(); |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | void com_android_internal_os_FuseAppLoop_replyRead( |
| 167 | JNIEnv* env, jobject self, jlong ptr, jlong unique, jint size, jbyteArray data) { |
| 168 | ScopedByteArrayRO array(env, data); |
| 169 | CHECK(size >= 0); |
| 170 | CHECK(static_cast<size_t>(size) < array.size()); |
| 171 | if (!reinterpret_cast<fuse::FuseAppLoop*>(ptr)->ReplyRead(unique, size, array.get())) { |
| 172 | reinterpret_cast<fuse::FuseAppLoop*>(ptr)->Break(); |
| 173 | } |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | const JNINativeMethod methods[] = { |
| 177 | { |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 178 | "native_new", |
| 179 | "(I)J", |
| 180 | reinterpret_cast<void*>(com_android_internal_os_FuseAppLoop_new) |
| 181 | }, |
| 182 | { |
| 183 | "native_delete", |
| 184 | "(J)V", |
| 185 | reinterpret_cast<void*>(com_android_internal_os_FuseAppLoop_delete) |
| 186 | }, |
| 187 | { |
| 188 | "native_start", |
| 189 | "(J)V", |
| 190 | reinterpret_cast<void*>(com_android_internal_os_FuseAppLoop_start) |
| 191 | }, |
| 192 | { |
| 193 | "native_replySimple", |
| 194 | "(JJI)V", |
| 195 | reinterpret_cast<void*>(com_android_internal_os_FuseAppLoop_replySimple) |
| 196 | }, |
| 197 | { |
| 198 | "native_replyOpen", |
| 199 | "(JJJ)V", |
| 200 | reinterpret_cast<void*>(com_android_internal_os_FuseAppLoop_replyOpen) |
| 201 | }, |
| 202 | { |
| 203 | "native_replyLookup", |
| 204 | "(JJJJ)V", |
| 205 | reinterpret_cast<void*>(com_android_internal_os_FuseAppLoop_replyLookup) |
| 206 | }, |
| 207 | { |
| 208 | "native_replyGetAttr", |
| 209 | "(JJJJ)V", |
| 210 | reinterpret_cast<void*>(com_android_internal_os_FuseAppLoop_replyGetAttr) |
| 211 | }, |
| 212 | { |
| 213 | "native_replyRead", |
| 214 | "(JJI[B)V", |
| 215 | reinterpret_cast<void*>(com_android_internal_os_FuseAppLoop_replyRead) |
| 216 | }, |
| 217 | { |
| 218 | "native_replyWrite", |
| 219 | "(JJI)V", |
| 220 | reinterpret_cast<void*>(com_android_internal_os_FuseAppLoop_replyWrite) |
| 221 | }, |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 222 | }; |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 223 | } // namespace |
| 224 | |
| 225 | int register_com_android_internal_os_FuseAppLoop(JNIEnv* env) { |
| 226 | gFuseAppLoopClass = MakeGlobalRefOrDie(env, FindClassOrDie(env, CLASS_NAME)); |
Daichi Hirono | 4f15606 | 2017-02-08 16:20:20 +0900 | [diff] [blame] | 227 | gOnCommandMethod = GetMethodIDOrDie(env, gFuseAppLoopClass, "onCommand", "(IJJJI[B)V"); |
| 228 | gOnOpenMethod = GetMethodIDOrDie(env, gFuseAppLoopClass, "onOpen", "(JJ)[B"); |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 229 | RegisterMethodsOrDie(env, CLASS_NAME, methods, NELEM(methods)); |
| 230 | return 0; |
| 231 | } |
Daichi Hirono | 878e86f | 2016-10-31 09:33:30 +0900 | [diff] [blame] | 232 | } // namespace android |