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/*
* Metadata on-disk locking for processes serialization
*
* Copyright (C) 2016-2023 Red Hat, Inc. All rights reserved.
* Copyright (C) 2016-2023 Ondrej Kozina
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _CRYPTSETUP_UTILS_LOCKING_H
#define _CRYPTSETUP_UTILS_LOCKING_H
#include <stdbool.h>
struct crypt_device;
struct crypt_lock_handle;
struct device;
int device_locked_readonly(struct crypt_lock_handle *h);
int device_locked(struct crypt_lock_handle *h);
int device_read_lock_internal(struct crypt_device *cd, struct device *device);
int device_write_lock_internal(struct crypt_device *cd, struct device *device);
void device_unlock_internal(struct crypt_device *cd, struct device *device);
int device_locked_verify(struct crypt_device *cd, int fd, struct crypt_lock_handle *h);
int crypt_read_lock(struct crypt_device *cd, const char *name, bool blocking, struct crypt_lock_handle **lock);
int crypt_write_lock(struct crypt_device *cd, const char *name, bool blocking, struct crypt_lock_handle **lock);
void crypt_unlock_internal(struct crypt_device *cd, struct crypt_lock_handle *h);
/* Used only in device internal allocation */
void device_set_lock_handle(struct device *device, struct crypt_lock_handle *h);
struct crypt_lock_handle *device_get_lock_handle(struct device *device);
#endif
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