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 off64_t readahead_size_kb = -1; 51 std::string encryption_options; 52 off64_t erase_blk_size = 0; 53 off64_t logical_blk_size = 0; 54 std::string sysfs_path; 55 std::string vbmeta_partition; 56 uint64_t zram_backingdev_size = 0; 57 std::string avb_keys; 58 std::string lowerdir; 59 60 struct FsMgrFlags { 61 bool wait : 1; 62 bool check : 1; 63 bool crypt : 1; 64 bool nonremovable : 1; 65 bool vold_managed : 1; 66 bool recovery_only : 1; 67 bool verify : 1; 68 bool force_crypt : 1; 69 bool no_emulated_sd : 1; // No emulated sdcard daemon; sd card is the only external 70 // storage. 71 bool no_trim : 1; 72 bool file_encryption : 1; 73 bool formattable : 1; 74 bool slot_select : 1; 75 bool force_fde_or_fbe : 1; 76 bool late_mount : 1; 77 bool no_fail : 1; 78 bool verify_at_boot : 1; 79 bool quota : 1; 80 bool avb : 1; 81 bool logical : 1; 82 bool checkpoint_blk : 1; 83 bool checkpoint_fs : 1; 84 bool first_stage_mount : 1; 85 bool slot_select_other : 1; 86 bool fs_verity : 1; 87 bool ext_meta_csum : 1; 88 bool fs_compress : 1; 89 } fs_mgr_flags = {}; 90 is_encryptableFstabEntry91 bool is_encryptable() const { 92 return fs_mgr_flags.crypt || fs_mgr_flags.force_crypt || fs_mgr_flags.force_fde_or_fbe; 93 } 94 }; 95 96 // An Fstab is a collection of FstabEntry structs. 97 // The entries must be kept in the same order as they were seen in the fstab. 98 // Unless explicitly requested, a lookup on mount point should always return the 1st one. 99 using Fstab = std::vector<FstabEntry>; 100 101 bool ReadFstabFromFile(const std::string& path, Fstab* fstab); 102 bool ReadFstabFromDt(Fstab* fstab, bool verbose = true); 103 bool ReadDefaultFstab(Fstab* fstab); 104 bool SkipMountingPartitions(Fstab* fstab, bool verbose = false); 105 106 FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path); 107 // The Fstab can contain multiple entries for the same mount point with different configurations. 108 std::vector<FstabEntry*> GetEntriesForMountPoint(Fstab* fstab, const std::string& path); 109 110 // This method builds DSU fstab entries and transfer the fstab. 111 // 112 // fstab points to the unmodified fstab. 113 // 114 // dsu_partitions contains partition names, e.g. 115 // dsu_partitions[0] = "system_gsi" 116 // dsu_partitions[1] = "userdata_gsi" 117 // dsu_partitions[2] = ... 118 void TransformFstabForDsu(Fstab* fstab, const std::string& dsu_slot, 119 const std::vector<std::string>& dsu_partitions); 120 121 std::set<std::string> GetBootDevices(); 122 123 // Return the name of the dm-verity device for the given fstab entry. This does 124 // not check whether the device is valid or exists; it merely returns the 125 // expected name. 126 std::string GetVerityDeviceName(const FstabEntry& entry); 127 128 } // namespace fs_mgr 129 } // namespace android 130