/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <linux/dm-ioctl.h>
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#include <functional>
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#include <string>
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#include <fstab/fstab.h>
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// Magic number at start of verity metadata
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#define VERITY_METADATA_MAGIC_NUMBER 0xb001b001
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// Replacement magic number at start of verity metadata to cleanly
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// turn verity off in userdebug builds.
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#define VERITY_METADATA_MAGIC_DISABLE 0x46464f56 // "VOFF"
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// Verity modes
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enum verity_mode {
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VERITY_MODE_EIO = 0,
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VERITY_MODE_LOGGING = 1,
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VERITY_MODE_RESTART = 2,
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VERITY_MODE_LAST = VERITY_MODE_RESTART,
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VERITY_MODE_DEFAULT = VERITY_MODE_RESTART
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};
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// Mount modes
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enum mount_mode {
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MOUNT_MODE_DEFAULT = 0,
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MOUNT_MODE_EARLY = 1,
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MOUNT_MODE_LATE = 2
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};
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#define FS_MGR_MNTALL_DEV_IS_METADATA_ENCRYPTED 7
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#define FS_MGR_MNTALL_DEV_NEEDS_METADATA_ENCRYPTION 6
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#define FS_MGR_MNTALL_DEV_FILE_ENCRYPTED 5
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#define FS_MGR_MNTALL_DEV_NEEDS_RECOVERY 4
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#define FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION 3
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#define FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED 2
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#define FS_MGR_MNTALL_DEV_NOT_ENCRYPTED 1
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#define FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE 0
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#define FS_MGR_MNTALL_FAIL (-1)
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// fs_mgr_mount_all() updates fstab entries that reference device-mapper.
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int fs_mgr_mount_all(android::fs_mgr::Fstab* fstab, int mount_mode);
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#define FS_MGR_DOMNT_FAILED (-1)
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#define FS_MGR_DOMNT_BUSY (-2)
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#define FS_MGR_DOMNT_SUCCESS 0
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int fs_mgr_do_mount(android::fs_mgr::Fstab* fstab, const char* n_name, char* n_blk_device,
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char* tmp_mount_point);
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int fs_mgr_do_mount(android::fs_mgr::Fstab* fstab, const char* n_name, char* n_blk_device,
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char* tmp_mount_point, bool need_cp);
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int fs_mgr_do_mount_one(const android::fs_mgr::FstabEntry& entry,
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const std::string& mount_point = "");
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int fs_mgr_do_tmpfs_mount(const char *n_name);
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bool fs_mgr_load_verity_state(int* mode);
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// Returns true if verity is enabled on this particular FstabEntry.
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bool fs_mgr_is_verity_enabled(const android::fs_mgr::FstabEntry& entry);
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bool fs_mgr_swapon_all(const android::fs_mgr::Fstab& fstab);
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bool fs_mgr_update_logical_partition(android::fs_mgr::FstabEntry* entry);
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// Returns true if the given fstab entry has verity enabled, *and* the verity
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// device is in "check_at_most_once" mode.
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bool fs_mgr_verity_is_check_at_most_once(const android::fs_mgr::FstabEntry& entry);
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int fs_mgr_do_format(const android::fs_mgr::FstabEntry& entry, bool reserve_footer);
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int fs_mgr_do_resize(const android::fs_mgr::FstabEntry& entry, bool reserve_footer);
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#define FS_MGR_SETUP_VERITY_SKIPPED (-3)
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#define FS_MGR_SETUP_VERITY_DISABLED (-2)
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#define FS_MGR_SETUP_VERITY_FAIL (-1)
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#define FS_MGR_SETUP_VERITY_SUCCESS 0
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int fs_mgr_setup_verity(android::fs_mgr::FstabEntry* fstab, bool wait_for_verity_dev);
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// Return the name of the super partition if it exists. If a slot number is
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// specified, the super partition for the corresponding metadata slot will be
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// returned. Otherwise, it will use the current slot.
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std::string fs_mgr_get_super_partition_name(int slot = -1);
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enum FsMgrUmountStatus : int {
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SUCCESS = 0,
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ERROR_UNKNOWN = 1 << 0,
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ERROR_UMOUNT = 1 << 1,
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ERROR_VERITY = 1 << 2,
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ERROR_DEVICE_MAPPER = 1 << 3,
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};
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// fs_mgr_umount_all() is the reverse of fs_mgr_mount_all. In particular,
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// it destroys verity devices from device mapper after the device is unmounted.
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int fs_mgr_umount_all(android::fs_mgr::Fstab* fstab);
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// Finds the dm_bow device on which this block device is stacked, or returns
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// empty string
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std::string fs_mgr_find_bow_device(const std::string& block_device);
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