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48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/*
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* dm-verity Forward Error Correction (FEC) support
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*
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* Copyright (C) 2015, Google, Inc. All rights reserved.
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*
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* This file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _FEC_H
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#define _FEC_H
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#include <unistd.h>
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/* ecc parameters */
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#define FEC_RSM 255
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#define FEC_MIN_RSN 231
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#define FEC_MAX_RSN 253
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/* parameters to init_rs_char */
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#define FEC_PARAMS(roots) \
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8, /* symbol size in bits */ \
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0x11d, /* field generator polynomial coefficients */ \
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0, /* first root of the generator */ \
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1, /* primitive element to generate polynomial roots */ \
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(roots), /* polynomial degree (number of roots) */ \
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0 /* padding bytes at the front of shortened block */
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struct crypt_device;
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struct crypt_params_verity;
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int VERITY_FEC_create(struct crypt_device *cd,
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struct crypt_params_verity *params);
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#endif
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