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 specic language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_LIBAPPFUSE_FUSEAPPLOOP_H_ 18 #define ANDROID_LIBAPPFUSE_FUSEAPPLOOP_H_ 19 20 #include <memory> 21 #include <mutex> 22 23 #include <android-base/unique_fd.h> 24 25 #include "libappfuse/FuseBuffer.h" 26 27 namespace android { 28 namespace fuse { 29 30 class EpollController; 31 32 class FuseAppLoopCallback { 33 public: 34 virtual void OnLookup(uint64_t unique, uint64_t inode) = 0; 35 virtual void OnGetAttr(uint64_t unique, uint64_t inode) = 0; 36 virtual void OnFsync(uint64_t unique, uint64_t inode) = 0; 37 virtual void OnWrite(uint64_t unique, uint64_t inode, uint64_t offset, uint32_t size, 38 const void* data) = 0; 39 virtual void OnRead(uint64_t unique, uint64_t inode, uint64_t offset, uint32_t size) = 0; 40 virtual void OnOpen(uint64_t unique, uint64_t inode) = 0; 41 virtual void OnRelease(uint64_t unique, uint64_t inode) = 0; 42 virtual ~FuseAppLoopCallback(); 43 }; 44 45 class FuseAppLoop final { 46 public: 47 FuseAppLoop(base::unique_fd&& fd); 48 49 void Start(FuseAppLoopCallback* callback); 50 void Break(); 51 52 bool ReplySimple(uint64_t unique, int32_t result); 53 bool ReplyLookup(uint64_t unique, uint64_t inode, int64_t size); 54 bool ReplyGetAttr(uint64_t unique, uint64_t inode, int64_t size, int mode); 55 bool ReplyOpen(uint64_t unique, uint64_t fh); 56 bool ReplyWrite(uint64_t unique, uint32_t size); 57 bool ReplyRead(uint64_t unique, uint32_t size, const void* data); 58 59 private: 60 base::unique_fd fd_; 61 base::unique_fd break_fd_; 62 63 // Lock for multi-threading. 64 std::mutex mutex_; 65 }; 66 67 bool StartFuseAppLoop(int fd, FuseAppLoopCallback* callback); 68 69 } // namespace fuse 70 } // namespace android 71 72 #endif // ANDROID_LIBAPPFUSE_FUSEAPPLOOP_H_ 73
