1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef OHOS_STORAGE_DAEMON_MOUNT_MANAGER_H 17 #define OHOS_STORAGE_DAEMON_MOUNT_MANAGER_H 18 19 #include <string> 20 #include <vector> 21 #include <sys/types.h> 22 #include <nocopyable.h> 23 24 namespace OHOS { 25 namespace StorageDaemon { 26 struct DirInfo { 27 const std::string path; 28 mode_t mode; 29 uid_t uid; 30 gid_t gid; 31 }; 32 33 constexpr uid_t OID_ROOT = 0; 34 constexpr uid_t OID_SYSTEM = 1000; 35 constexpr uid_t OID_USER_DATA_RW = 1008; 36 37 class MountManager final { 38 public: 39 MountManager(); 40 virtual ~MountManager() = default; 41 static std::shared_ptr<MountManager> GetInstance(); 42 int32_t MountByUser(int32_t userId); 43 int32_t UmountByUser(int32_t userId); 44 int32_t PrepareHmdfsDirs(int32_t userId); 45 int32_t DestroyHmdfsDirs(int32_t userId); 46 47 private: 48 bool SupportHmdfs(); 49 int32_t CreateVirtualDirs(int32_t userId); 50 int32_t HmdfsMount(int32_t userId); 51 int32_t HmdfsMount(int32_t userId, std::string relativePath); 52 int32_t HmdfsTwiceMount(int32_t userId, std::string relativePath); 53 int32_t HmdfsUMount(int32_t userId); 54 int32_t HmdfsUMount(int32_t userId, std::string relativePath); 55 int32_t HmdfsTwiceUMount(int32_t userId, std::string relativePath); 56 int32_t LocalMount(int32_t userId); 57 int32_t LocalUMount(int32_t userId); 58 59 DISALLOW_COPY_AND_MOVE(MountManager); 60 61 static std::shared_ptr<MountManager> instance_; 62 const std::vector<DirInfo> hmdfsDirVec_; 63 const std::vector<DirInfo> virtualDir_; 64 }; 65 } // STORAGE_DAEMON 66 } // OHOS 67 68 #endif // OHOS_STORAGE_DAEMON_USER_MANAGER_H