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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 <linux/dm-ioctl.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/types.h>
#include <set>
#include <string>
#include <vector>
/*
* 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.
*/
struct fstab {
int num_entries;
struct fstab_rec* recs;
};
struct fstab_rec {
char* blk_device;
char* logical_partition_name;
char* mount_point;
char* fs_type;
unsigned long flags;
char* fs_options;
int fs_mgr_flags;
char* key_loc;
char* key_dir;
char* verity_loc;
off64_t length;
char* label;
int partnum;
int swap_prio;
int max_comp_streams;
off64_t zram_size;
off64_t reserved_size;
int file_contents_mode;
int file_names_mode;
off64_t erase_blk_size;
off64_t logical_blk_size;
char* sysfs_path;
};
struct fstab* fs_mgr_read_fstab_default();
struct fstab* fs_mgr_read_fstab_dt();
struct fstab* fs_mgr_read_fstab(const char* fstab_path);
void fs_mgr_free_fstab(struct fstab* fstab);
int fs_mgr_add_entry(struct fstab* fstab, const char* mount_point, const char* fs_type,
const char* blk_device);
struct fstab_rec* fs_mgr_get_entry_for_mount_point(struct fstab* fstab, const std::string& path);
int fs_mgr_is_voldmanaged(const struct fstab_rec* fstab);
int fs_mgr_is_nonremovable(const struct fstab_rec* fstab);
int fs_mgr_is_verified(const struct fstab_rec* fstab);
int fs_mgr_is_verifyatboot(const struct fstab_rec* fstab);
int fs_mgr_is_avb(const struct fstab_rec* fstab);
int fs_mgr_is_encryptable(const struct fstab_rec* fstab);
int fs_mgr_is_file_encrypted(const struct fstab_rec* fstab);
void fs_mgr_get_file_encryption_modes(const struct fstab_rec* fstab, const char** contents_mode_ret,
const char** filenames_mode_ret);
int fs_mgr_is_convertible_to_fbe(const struct fstab_rec* fstab);
int fs_mgr_is_noemulatedsd(const struct fstab_rec* fstab);
int fs_mgr_is_notrim(const struct fstab_rec* fstab);
int fs_mgr_is_formattable(const struct fstab_rec* fstab);
int fs_mgr_is_slotselect(const struct fstab_rec* fstab);
int fs_mgr_is_nofail(const struct fstab_rec* fstab);
int fs_mgr_is_first_stage_mount(const struct fstab_rec* fstab);
int fs_mgr_is_latemount(const struct fstab_rec* fstab);
int fs_mgr_is_quota(const struct fstab_rec* fstab);
int fs_mgr_is_logical(const struct fstab_rec* fstab);
int fs_mgr_is_checkpoint(const struct fstab_rec* fstab);
int fs_mgr_is_checkpoint_fs(const struct fstab_rec* fstab);
int fs_mgr_is_checkpoint_blk(const struct fstab_rec* fstab);
int fs_mgr_has_sysfs_path(const struct fstab_rec* fstab);
std::string fs_mgr_get_slot_suffix();
std::set<std::string> fs_mgr_get_boot_devices();
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 key_loc;
std::string key_dir;
std::string verity_loc;
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;
int file_contents_mode = 0;
int file_names_mode = 0;
off64_t erase_blk_size = 0;
off64_t logical_blk_size = 0;
std::string sysfs_path;
std::string vbmeta_partition;
// TODO: Remove this union once fstab_rec is deprecated. It only serves as a
// convenient way to convert between fstab_rec::fs_mgr_flags and these bools.
union {
int val;
struct {
bool wait : 1;
bool check : 1;
bool crypt : 1;
bool nonremovable : 1;
bool vold_managed : 1;
bool length : 1;
bool recovery_only : 1;
bool swap_prio : 1;
bool zram_size : 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 max_comp_streams : 1;
bool reserved_size : 1;
bool quota : 1;
bool erase_blk_size : 1;
bool logical_blk_size : 1;
bool avb : 1;
bool key_directory : 1;
bool sysfs : 1;
bool logical : 1;
bool checkpoint_blk : 1;
bool checkpoint_fs : 1;
bool first_stage_mount : 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.
using Fstab = std::vector<FstabEntry>;
bool ReadFstabFromFile(const std::string& path, Fstab* fstab);
bool ReadFstabFromDt(Fstab* fstab);
bool ReadDefaultFstab(Fstab* fstab);
// Temporary conversion functions.
FstabEntry FstabRecToFstabEntry(const fstab_rec* fstab_rec);
Fstab LegacyFstabToFstab(const struct fstab* legacy_fstab);
fstab* FstabToLegacyFstab(const Fstab& fstab);
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