text: /*
   * CDDL HEADER START
   *
   * The contents of this file are subject to the terms of the
   * Common Development and Distribution License (the "License").
   * You may not use this file except in compliance with the License.
   *
   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   * or http://www.opensolaris.org/os/licensing.
   * See the License for the specific language governing permissions
   * and limitations under the License.
   *
   * When distributing Covered Code, include this CDDL HEADER in each
   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
   * If applicable, add the following below this CDDL HEADER, with the
   * fields enclosed by brackets "[]" replaced with your own identifying
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
   * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _SYS_ZIO_CHECKSUM_H
  #define	_SYS_ZIO_CHECKSUM_H
  
  #include <sys/zio.h>
  #include <zfs_fletcher.h>
  
  #ifdef	__cplusplus
  extern "C" {
  #endif
  
  /*
   * Signature for checksum functions.
   */
  typedef void zio_checksum_t(const void *data, uint64_t size, zio_cksum_t *zcp);
  
  /*
   * Information about each checksum function.
   */
  typedef struct zio_checksum_info {
  	zio_checksum_t	*ci_func[2]; /* checksum function for each byteorder */
  	int		ci_correctable;	/* number of correctable bits	*/
  	int		ci_eck;		/* uses zio embedded checksum? */
  	int		ci_dedup;	/* strong enough for dedup? */
  	char		*ci_name;	/* descriptive name */
  } zio_checksum_info_t;
  
  typedef struct zio_bad_cksum {
  	zio_cksum_t		zbc_expected;
  	zio_cksum_t		zbc_actual;
  	const char		*zbc_checksum_name;
  	uint8_t			zbc_byteswapped;
  	uint8_t			zbc_injected;
  	uint8_t			zbc_has_cksum;	/* expected/actual valid */
  } zio_bad_cksum_t;
  
  extern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS];
  
  /*
   * Checksum routines.
   */
  extern zio_checksum_t zio_checksum_SHA256;
  
  extern void zio_checksum_compute(zio_t *zio, enum zio_checksum checksum,
      void *data, uint64_t size);
  extern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out);
  
  #ifdef	__cplusplus
  }
  #endif
  
  #endif	/* _SYS_ZIO_CHECKSUM_H */
  