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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.
*/
#ifndef __CORE_FS_MGR_H
#define __CORE_FS_MGR_H
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <linux/dm-ioctl.h>
// C++ only headers
// TODO: move this into separate header files under include/fs_mgr/*.h
#ifdef __cplusplus
#include <string>
#endif
// Magic number at start of verity metadata
#define VERITY_METADATA_MAGIC_NUMBER 0xb001b001
// Replacement magic number at start of verity metadata to cleanly
// turn verity off in userdebug builds.
#define VERITY_METADATA_MAGIC_DISABLE 0x46464f56 // "VOFF"
__BEGIN_DECLS
// Verity modes
enum verity_mode {
VERITY_MODE_EIO = 0,
VERITY_MODE_LOGGING = 1,
VERITY_MODE_RESTART = 2,
VERITY_MODE_LAST = VERITY_MODE_RESTART,
VERITY_MODE_DEFAULT = VERITY_MODE_RESTART
};
// Mount modes
enum mount_mode {
MOUNT_MODE_DEFAULT = 0,
MOUNT_MODE_EARLY = 1,
MOUNT_MODE_LATE = 2
};
/*
* 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;
char *fstab_filename;
};
struct fstab_rec {
char *blk_device;
char *mount_point;
char *fs_type;
unsigned long flags;
char *fs_options;
int fs_mgr_flags;
char *key_loc;
char *verity_loc;
long long length;
char *label;
int partnum;
int swap_prio;
int max_comp_streams;
unsigned int zram_size;
uint64_t reserved_size;
unsigned int file_encryption_mode;
unsigned int erase_blk_size;
unsigned int logical_blk_size;
};
// Callback function for verity status
typedef void (*fs_mgr_verity_state_callback)(struct fstab_rec *fstab,
const char *mount_point, int mode, int status);
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);
#define FS_MGR_MNTALL_DEV_FILE_ENCRYPTED 5
#define FS_MGR_MNTALL_DEV_NEEDS_RECOVERY 4
#define FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION 3
#define FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED 2
#define FS_MGR_MNTALL_DEV_NOT_ENCRYPTED 1
#define FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE 0
#define FS_MGR_MNTALL_FAIL (-1)
int fs_mgr_mount_all(struct fstab *fstab, int mount_mode);
#define FS_MGR_DOMNT_FAILED (-1)
#define FS_MGR_DOMNT_BUSY (-2)
int fs_mgr_do_mount(struct fstab *fstab, const char *n_name, char *n_blk_device,
char *tmp_mount_point);
int fs_mgr_do_mount_one(struct fstab_rec *rec);
int fs_mgr_do_tmpfs_mount(const char *n_name);
int fs_mgr_unmount_all(struct fstab *fstab);
int fs_mgr_get_crypt_info(struct fstab *fstab, char *key_loc,
char *real_blk_device, int size);
bool fs_mgr_load_verity_state(int* mode);
bool fs_mgr_update_verity_state(fs_mgr_verity_state_callback callback);
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 char *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);
const char* fs_mgr_get_file_encryption_mode(const struct fstab_rec *fstab);
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(struct fstab_rec *fstab);
int fs_mgr_is_formattable(struct fstab_rec *fstab);
int fs_mgr_is_slotselect(struct fstab_rec *fstab);
int fs_mgr_is_nofail(struct fstab_rec *fstab);
int fs_mgr_is_latemount(struct fstab_rec *fstab);
int fs_mgr_is_quota(struct fstab_rec *fstab);
int fs_mgr_swapon_all(struct fstab *fstab);
int fs_mgr_do_format(struct fstab_rec *fstab, bool reserve_footer);
#define FS_MGR_SETUP_VERITY_DISABLED (-2)
#define FS_MGR_SETUP_VERITY_FAIL (-1)
#define FS_MGR_SETUP_VERITY_SUCCESS 0
int fs_mgr_setup_verity(struct fstab_rec *fstab, bool wait_for_verity_dev);
__END_DECLS
// C++ only functions
// TODO: move this into separate header files under include/fs_mgr/*.h
#ifdef __cplusplus
std::string fs_mgr_get_slot_suffix();
#endif
#endif /* __CORE_FS_MGR_H */
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