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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 <chrono>
#include <string>
#include <android-base/logging.h>
#include <fs_mgr.h>
#include <fstab/fstab.h>
#include "libfstab/fstab_priv.h"
#define FS_MGR_TAG "[libfs_mgr] "
// Logs a message to kernel
#define LINFO LOG(INFO) << FS_MGR_TAG
#define LWARNING LOG(WARNING) << FS_MGR_TAG
#define LERROR LOG(ERROR) << FS_MGR_TAG
#define LFATAL LOG(FATAL) << FS_MGR_TAG
// Logs a message with strerror(errno) at the end
#define PINFO PLOG(INFO) << FS_MGR_TAG
#define PWARNING PLOG(WARNING) << FS_MGR_TAG
#define PERROR PLOG(ERROR) << FS_MGR_TAG
#define PFATAL PLOG(FATAL) << FS_MGR_TAG
#define CRYPTO_TMPFS_OPTIONS "size=512m,mode=0771,uid=1000,gid=1000"
/* fstab has the following format:
*
* Any line starting with a # is a comment and ignored
*
* Any blank line is ignored
*
* All other lines must be in this format:
* <source> <mount_point> <fs_type> <mount_flags> <fs_options> <fs_mgr_options>
*
* <mount_flags> is a comma separated list of flags that can be passed to the
* mount command. The list includes noatime, nosuid, nodev, nodiratime,
* ro, rw, remount, defaults.
*
* <fs_options> is a comma separated list of options accepted by the filesystem being
* mounted. It is passed directly to mount without being parsed
*
* <fs_mgr_options> is a comma separated list of flags that control the operation of
* the fs_mgr program. The list includes "wait", which will wait till
* the <source> file exists, and "check", which requests that the fs_mgr
* run an fscheck program on the <source> before mounting the filesystem.
* If check is specifed on a read-only filesystem, it is ignored.
* Also, "encryptable" means that filesystem can be encrypted.
* The "encryptable" flag _MUST_ be followed by a = and a string which
* is the location of the encryption keys. It can either be a path
* to a file or partition which contains the keys, or the word "footer"
* which means the keys are in the last 16 Kbytes of the partition
* containing the filesystem.
*
* When the fs_mgr is requested to mount all filesystems, it will first mount all the
* filesystems that do _NOT_ specify check (including filesystems that are read-only and
* specify check, because check is ignored in that case) and then it will check and mount
* filesystem marked with check.
*
*/
#define DM_BUF_SIZE 4096
using namespace std::chrono_literals;
bool fs_mgr_set_blk_ro(const std::string& blockdev, bool readonly = true);
bool fs_mgr_is_device_unlocked();
bool fs_mgr_is_ext4(const std::string& blk_device);
bool fs_mgr_is_f2fs(const std::string& blk_device);
bool fs_mgr_filesystem_available(const std::string& filesystem);
std::string fs_mgr_get_context(const std::string& mount_point);
namespace android {
namespace fs_mgr {
bool UnmapDevice(const std::string& name);
struct OverlayfsCheckResult {
bool supported;
std::string mount_flags;
};
OverlayfsCheckResult CheckOverlayfs();
} // namespace fs_mgr
} // namespace android
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