fs_manager.h

/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * 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 STARTUP_FS_MANAGER_H
#define STARTUP_FS_MANAGER_H

#include <stdbool.h>
#include <stdio.h>

#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif
#endif

/* Fs manager flags definition */
#define FS_MANAGER_CHECK  0x00000001
#define FS_MANAGER_WAIT  0x00000002
#define FS_MANAGER_REQUIRED  0x00000004

#define VALID_FS_MANAGER_FLAGS (FS_MANAGER_CHECK | FS_MANAGER_WAIT | FS_MANAGER_REQUIRED)
#define FS_MANAGER_FLAGS_ENABLED(fsMgrFlags, flag) (((fsMgrFlags) & FS_MANAGER_##flag) != 0)

#define FM_MANAGER_CHECK_ENABLED(fsMgrFlags) FS_MANAGER_FLAGS_ENABLED((fsMgrFlags), CHECK)
#define FM_MANAGER_WAIT_ENABLED(fsMgrFlags) FS_MANAGER_FLAGS_ENABLED((fsMgrFlags), WAIT)
#define FM_MANAGER_REQUIRED_ENABLED(fsMgrFlags) FS_MANAGER_FLAGS_ENABLED((fsMgrFlags), REQUIRED)

typedef enum MountStatus {
    MOUNT_ERROR = -1,
    MOUNT_UMOUNTED = 0,
    MOUNT_MOUNTED = 1,
} MountStatus;

typedef struct FstabItem {
    char *deviceName;  // Block device name
    char *mountPoint;  // Mount point
    char *fsType;      // File system type
    char *mountOptions;  // File system mount options. readonly, rw, remount etc.
    unsigned int fsManagerFlags;  // flags defined by fs manager.
    struct FstabItem *next;
} FstabItem;

typedef struct {
    struct FstabItem *head;
} Fstab;

void ReleaseFstab(Fstab *fstab);
Fstab *ReadFstabFromFile(const char *file, bool procMounts);
FstabItem *FindFstabItemForPath(Fstab fstab, const char *path);
FstabItem* FindFstabItemForMountPoint(Fstab fstab, const char *mp);
char *GetFstabFile(void);
int GetBlockDeviceByMountPoint(const char *mountPoint, const Fstab *fstab, char *deviceName, int nameLen);
bool IsSupportedFilesystem(const char *fsType);
int DoFormat(const char *devPath, const char *fsType);
int MountOneItem(FstabItem *item);
MountStatus GetMountStatusForMountPoint(const char *mp);
int MountAllWithFstabFile(const char *fstabFile, bool required);
int MountAllWithFstab(const Fstab *fstab, bool required);
int UmountAllWithFstabFile(const char *file);
unsigned long GetMountFlags(char *mountFlag, char *fsSpecificFlags, size_t fsSpecificFlagSize);
#ifdef __cplusplus
#if __cplusplus
}
#endif
#endif

#endif // STARTUP_FS_MANAGER_H