1 /* 2 * Copyright (C) 2012 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 <stdint.h> 20 #include <sys/types.h> 21 22 #include <set> 23 #include <string> 24 #include <vector> 25 26 std::string fs_mgr_get_slot_suffix(); 27 std::string fs_mgr_get_other_slot_suffix(); 28 29 namespace android { 30 namespace fs_mgr { 31 32 struct FstabEntry { 33 std::string blk_device; 34 std::string logical_partition_name; 35 std::string mount_point; 36 std::string fs_type; 37 unsigned long flags = 0; 38 std::string fs_options; 39 std::string fs_checkpoint_opts; 40 std::string key_loc; 41 std::string metadata_key_dir; 42 std::string metadata_encryption; 43 off64_t length = 0; 44 std::string label; 45 int partnum = -1; 46 int swap_prio = -1; 47 int max_comp_streams = 0; 48 off64_t zram_size = 0; 49 off64_t reserved_size = 0; 50 std::string encryption_options; 51 off64_t erase_blk_size = 0; 52 off64_t logical_blk_size = 0; 53 std::string sysfs_path; 54 std::string vbmeta_partition; 55 uint64_t zram_backingdev_size = 0; 56 std::string avb_keys; 57 58 struct FsMgrFlags { 59 bool wait : 1; 60 bool check : 1; 61 bool crypt : 1; 62 bool nonremovable : 1; 63 bool vold_managed : 1; 64 bool recovery_only : 1; 65 bool verify : 1; 66 bool force_crypt : 1; 67 bool no_emulated_sd : 1; // No emulated sdcard daemon; sd card is the only external 68 // storage. 69 bool no_trim : 1; 70 bool file_encryption : 1; 71 bool formattable : 1; 72 bool slot_select : 1; 73 bool force_fde_or_fbe : 1; 74 bool late_mount : 1; 75 bool no_fail : 1; 76 bool verify_at_boot : 1; 77 bool quota : 1; 78 bool avb : 1; 79 bool logical : 1; 80 bool checkpoint_blk : 1; 81 bool checkpoint_fs : 1; 82 bool first_stage_mount : 1; 83 bool slot_select_other : 1; 84 bool fs_verity : 1; 85 bool ext_meta_csum : 1; 86 } fs_mgr_flags = {}; 87 is_encryptableFstabEntry88 bool is_encryptable() const { 89 return fs_mgr_flags.crypt || fs_mgr_flags.force_crypt || fs_mgr_flags.force_fde_or_fbe; 90 } 91 }; 92 93 // An Fstab is a collection of FstabEntry structs. 94 // The entries must be kept in the same order as they were seen in the fstab. 95 // Unless explicitly requested, a lookup on mount point should always return the 1st one. 96 using Fstab = std::vector<FstabEntry>; 97 98 bool ReadFstabFromFile(const std::string& path, Fstab* fstab); 99 bool ReadFstabFromDt(Fstab* fstab, bool log = true); 100 bool ReadDefaultFstab(Fstab* fstab); 101 bool SkipMountingPartitions(Fstab* fstab); 102 103 FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path); 104 // The Fstab can contain multiple entries for the same mount point with different configurations. 105 std::vector<FstabEntry*> GetEntriesForMountPoint(Fstab* fstab, const std::string& path); 106 107 // This method builds DSU fstab entries and transfer the fstab. 108 // 109 // fstab points to the unmodified fstab. 110 // 111 // dsu_partitions contains partition names, e.g. 112 // dsu_partitions[0] = "system_gsi" 113 // dsu_partitions[1] = "userdata_gsi" 114 // dsu_partitions[2] = ... 115 void TransformFstabForDsu(Fstab* fstab, const std::vector<std::string>& dsu_partitions); 116 117 std::set<std::string> GetBootDevices(); 118 119 // Return the name of the dm-verity device for the given fstab entry. This does 120 // not check whether the device is valid or exists; it merely returns the 121 // expected name. 122 std::string GetVerityDeviceName(const FstabEntry& entry); 123 124 } // namespace fs_mgr 125 } // namespace android 126