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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stdint.h>
#include <sys/types.h>
#include <set>
#include <string>
#include <vector>
std::string fs_mgr_get_slot_suffix();
std::string fs_mgr_get_other_slot_suffix();
namespace android {
namespace fs_mgr {
struct FstabEntry {
std::string blk_device;
std::string logical_partition_name;
std::string mount_point;
std::string fs_type;
unsigned long flags = 0;
std::string fs_options;
std::string fs_checkpoint_opts;
std::string key_loc;
std::string metadata_key_dir;
std::string metadata_encryption;
off64_t length = 0;
std::string label;
int partnum = -1;
int swap_prio = -1;
int max_comp_streams = 0;
off64_t zram_size = 0;
off64_t reserved_size = 0;
off64_t readahead_size_kb = -1;
std::string encryption_options;
off64_t erase_blk_size = 0;
off64_t logical_blk_size = 0;
std::string sysfs_path;
std::string vbmeta_partition;
uint64_t zram_backingdev_size = 0;
std::string avb_keys;
std::string lowerdir;
struct FsMgrFlags {
bool wait : 1;
bool check : 1;
bool crypt : 1;
bool nonremovable : 1;
bool vold_managed : 1;
bool recovery_only : 1;
bool verify : 1;
bool force_crypt : 1;
bool no_emulated_sd : 1; // No emulated sdcard daemon; sd card is the only external
// storage.
bool no_trim : 1;
bool file_encryption : 1;
bool formattable : 1;
bool slot_select : 1;
bool force_fde_or_fbe : 1;
bool late_mount : 1;
bool no_fail : 1;
bool verify_at_boot : 1;
bool quota : 1;
bool avb : 1;
bool logical : 1;
bool checkpoint_blk : 1;
bool checkpoint_fs : 1;
bool first_stage_mount : 1;
bool slot_select_other : 1;
bool fs_verity : 1;
bool ext_meta_csum : 1;
bool fs_compress : 1;
} fs_mgr_flags = {};
bool is_encryptable() const {
return fs_mgr_flags.crypt || fs_mgr_flags.force_crypt || fs_mgr_flags.force_fde_or_fbe;
}
};
// An Fstab is a collection of FstabEntry structs.
// The entries must be kept in the same order as they were seen in the fstab.
// Unless explicitly requested, a lookup on mount point should always return the 1st one.
using Fstab = std::vector<FstabEntry>;
bool ReadFstabFromFile(const std::string& path, Fstab* fstab);
bool ReadFstabFromDt(Fstab* fstab, bool verbose = true);
bool ReadDefaultFstab(Fstab* fstab);
bool SkipMountingPartitions(Fstab* fstab, bool verbose = false);
FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path);
// The Fstab can contain multiple entries for the same mount point with different configurations.
std::vector<FstabEntry*> GetEntriesForMountPoint(Fstab* fstab, const std::string& path);
// This method builds DSU fstab entries and transfer the fstab.
//
// fstab points to the unmodified fstab.
//
// dsu_partitions contains partition names, e.g.
// dsu_partitions[0] = "system_gsi"
// dsu_partitions[1] = "userdata_gsi"
// dsu_partitions[2] = ...
void TransformFstabForDsu(Fstab* fstab, const std::string& dsu_slot,
const std::vector<std::string>& dsu_partitions);
std::set<std::string> GetBootDevices();
// Return the name of the dm-verity device for the given fstab entry. This does
// not check whether the device is valid or exists; it merely returns the
// expected name.
std::string GetVerityDeviceName(const FstabEntry& entry);
} // namespace fs_mgr
} // namespace android
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