1 /*
2  * Copyright (C) 2022 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 <string>
20 
21 #include <fstab/fstab.h>
22 
23 bool fs_mgr_overlayfs_already_mounted(const std::string& mount_point, bool overlay_only = true);
24 bool fs_mgr_wants_overlayfs(android::fs_mgr::FstabEntry* entry);
25 android::fs_mgr::Fstab fs_mgr_overlayfs_candidate_list(const android::fs_mgr::Fstab& fstab);
26 
27 // If "mount_point" is non-null, set up exactly one overlay.
28 // If "mount_point" is null, setup any overlays.
29 //
30 // If |want_reboot| is non-null, and a reboot is needed to apply overlays, then
31 // it will be true on return. The caller is responsible for initializing it.
32 bool fs_mgr_overlayfs_setup(const android::fs_mgr::Fstab& fstab, const char* mount_point = nullptr,
33                             bool* want_reboot = nullptr, bool just_disabled_verity = true);
34 
35 enum class OverlayfsTeardownResult {
36     Ok,
37     Busy,  // Indicates that overlays are still in use.
38     Error
39 };
40 OverlayfsTeardownResult fs_mgr_overlayfs_teardown(const char* mount_point = nullptr,
41                                                   bool* want_reboot = nullptr);
42 
43 namespace android {
44 namespace fs_mgr {
45 
46 void CleanupOldScratchFiles();
47 
48 }  // namespace fs_mgr
49 }  // namespace android
50