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 key_loc; 40 std::string metadata_key_dir; 41 std::string metadata_encryption; 42 off64_t length = 0; 43 std::string label; 44 int partnum = -1; 45 int swap_prio = -1; 46 int max_comp_streams = 0; 47 off64_t zram_size = 0; 48 off64_t reserved_size = 0; 49 std::string encryption_options; 50 off64_t erase_blk_size = 0; 51 off64_t logical_blk_size = 0; 52 std::string sysfs_path; 53 std::string vbmeta_partition; 54 std::string zram_loopback_path; 55 uint64_t zram_loopback_size = 512 * 1024 * 1024; // 512MB by default; 56 std::string zram_backing_dev_path; 57 std::string avb_keys; 58 59 struct FsMgrFlags { 60 bool wait : 1; 61 bool check : 1; 62 bool crypt : 1; 63 bool nonremovable : 1; 64 bool vold_managed : 1; 65 bool recovery_only : 1; 66 bool verify : 1; 67 bool force_crypt : 1; 68 bool no_emulated_sd : 1; // No emulated sdcard daemon; sd card is the only external 69 // storage. 70 bool no_trim : 1; 71 bool file_encryption : 1; 72 bool formattable : 1; 73 bool slot_select : 1; 74 bool force_fde_or_fbe : 1; 75 bool late_mount : 1; 76 bool no_fail : 1; 77 bool verify_at_boot : 1; 78 bool quota : 1; 79 bool avb : 1; 80 bool logical : 1; 81 bool checkpoint_blk : 1; 82 bool checkpoint_fs : 1; 83 bool first_stage_mount : 1; 84 bool slot_select_other : 1; 85 bool fs_verity : 1; 86 bool ext_meta_csum : 1; 87 bool fs_compress : 1; 88 } fs_mgr_flags = {}; 89 is_encryptableFstabEntry90 bool is_encryptable() const { 91 return fs_mgr_flags.crypt || fs_mgr_flags.force_crypt || fs_mgr_flags.force_fde_or_fbe; 92 } 93 }; 94 95 // An Fstab is a collection of FstabEntry structs. 96 // The entries must be kept in the same order as they were seen in the fstab. 97 // Unless explicitly requested, a lookup on mount point should always return the 1st one. 98 using Fstab = std::vector<FstabEntry>; 99 100 bool ReadFstabFromFile(const std::string& path, Fstab* fstab); 101 bool ReadFstabFromDt(Fstab* fstab, bool log = true); 102 bool ReadDefaultFstab(Fstab* fstab); 103 bool SkipMountingPartitions(Fstab* fstab); 104 105 FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path); 106 // The Fstab can contain multiple entries for the same mount point with different configurations. 107 std::vector<FstabEntry*> GetEntriesForMountPoint(Fstab* fstab, const std::string& path); 108 109 // This method builds DSU fstab entries and transfer the fstab. 110 // 111 // fstab points to the unmodified fstab. 112 // 113 // dsu_partitions contains partition names, e.g. 114 // dsu_partitions[0] = "system_gsi" 115 // dsu_partitions[1] = "userdata_gsi" 116 // dsu_partitions[2] = ... 117 void TransformFstabForDsu(Fstab* fstab, const std::vector<std::string>& dsu_partitions); 118 119 std::set<std::string> GetBootDevices(); 120 121 // Return the name of the dm-verity device for the given fstab entry. This does 122 // not check whether the device is valid or exists; it merely returns the 123 // expected name. 124 std::string GetVerityDeviceName(const FstabEntry& entry); 125 126 } // namespace fs_mgr 127 } // namespace android 128