/*
 * dm-verity Forward Error Correction (FEC) support
 *
 * Copyright (C) 2015, Google, Inc. All rights reserved.
 *
 * This file is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This file 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this file; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _FEC_H
#define _FEC_H

#include <unistd.h>

/* ecc parameters */
#define FEC_RSM 255
#define FEC_MIN_RSN 231
#define FEC_MAX_RSN 253

/* parameters to init_rs_char */
#define FEC_PARAMS(roots) \
    8,          /* symbol size in bits */ \
    0x11d,      /* field generator polynomial coefficients */ \
    0,          /* first root of the generator */ \
    1,          /* primitive element to generate polynomial roots */ \
    (roots),    /* polynomial degree (number of roots) */ \
    0           /* padding bytes at the front of shortened block */


struct crypt_device;
struct crypt_params_verity;

int VERITY_FEC_create(struct crypt_device *cd,
		      struct crypt_params_verity *params);

#endif