include/zfs/zio_checksum.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /*
  20  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  21  * Use is subject to license terms.
  22  */
  23
  24 #ifndef _SYS_ZIO_CHECKSUM_H
  25 #define _SYS_ZIO_CHECKSUM_H
  26
  27 /*
  28  * Signature for checksum functions.
  29  */
  30 typedef void zio_checksum_t(const void *data, uint64_t size,
  31                             zfs_endian_t endian, zio_cksum_t *zcp);
  32
  33 /*
  34  * Information about each checksum function.
  35  */
  36 typedef struct zio_checksum_info {
  37         zio_checksum_t  *ci_func; /* checksum function for each byteorder */
  38         int             ci_correctable; /* number of correctable bits   */
  39         int             ci_eck;         /* uses zio embedded checksum? */
  40         char            *ci_name;       /* descriptive name */
  41 } zio_checksum_info_t;
  42
  43 extern void zio_checksum_SHA256(const void *, uint64_t,
  44                                  zfs_endian_t endian, zio_cksum_t *);
  45 extern void fletcher_2_endian(const void *, uint64_t, zfs_endian_t endian,
  46                         zio_cksum_t *);
  47 extern void fletcher_4_endian(const void *, uint64_t, zfs_endian_t endian,
  48                         zio_cksum_t *);
  49
  50 #endif  /* _SYS_ZIO_CHECKSUM_H */