1 /* 2 * Copyright (C) 2018 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 #pragma once 18 19 #include <functional> 20 21 #include <fstab/fstab.h> 22 23 #include <set> 24 #include <string> 25 #include <vector> 26 27 android::fs_mgr::Fstab fs_mgr_overlayfs_candidate_list(const android::fs_mgr::Fstab& fstab); 28 29 bool fs_mgr_overlayfs_mount_all(android::fs_mgr::Fstab* fstab); 30 bool fs_mgr_overlayfs_setup(const char* backing = nullptr, const char* mount_point = nullptr, 31 bool* change = nullptr, bool force = true); 32 bool fs_mgr_overlayfs_teardown(const char* mount_point = nullptr, bool* change = nullptr); 33 bool fs_mgr_overlayfs_is_setup(); 34 bool fs_mgr_has_shared_blocks(const std::string& mount_point, const std::string& dev); 35 std::string fs_mgr_get_context(const std::string& mount_point); 36 37 enum class OverlayfsValidResult { 38 kNotSupported = 0, 39 kOk, 40 kOverrideCredsRequired, 41 }; 42 OverlayfsValidResult fs_mgr_overlayfs_valid(); 43 44 namespace android { 45 namespace fs_mgr { 46 47 void MapScratchPartitionIfNeeded(Fstab* fstab, 48 const std::function<bool(const std::set<std::string>&)>& init); 49 void CleanupOldScratchFiles(); 50 51 // Teardown overlays of all sources (cache dir, scratch device, DSU) for |mount_point|. 52 // Teardown all overlays if |mount_point| is empty. 53 // 54 // Note: This should be called if and only if in recovery or fastbootd to teardown 55 // overlays if any partition is flashed or updated. 56 void TeardownAllOverlayForMountPoint(const std::string& mount_point = {}); 57 58 } // namespace fs_mgr 59 } // namespace android 60