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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #ifndef _SYS_ZIO_CHECKSUM_H
     27 #define	_SYS_ZIO_CHECKSUM_H
     28 
     29 #pragma ident	"@(#)zio_checksum.h	1.2	06/03/03 SMI"
     30 
     31 #include <sys/zio.h>
     32 
     33 #ifdef	__cplusplus
     34 extern "C" {
     35 #endif
     36 
     37 /*
     38  * Signature for checksum functions.
     39  */
     40 typedef void zio_checksum_t(const void *data, uint64_t size, zio_cksum_t *zcp);
     41 
     42 /*
     43  * Information about each checksum function.
     44  */
     45 typedef struct zio_checksum_info {
     46 	zio_checksum_t	*ci_func[2]; /* checksum function for each byteorder */
     47 	int		ci_correctable;	/* number of correctable bits	*/
     48 	int		ci_zbt;		/* uses zio block tail?	*/
     49 	char		*ci_name;	/* descriptive name */
     50 } zio_checksum_info_t;
     51 
     52 extern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS];
     53 
     54 /*
     55  * Checksum routines.
     56  */
     57 extern zio_checksum_t fletcher_2_native;
     58 extern zio_checksum_t fletcher_4_native;
     59 extern zio_checksum_t fletcher_4_incremental_native;
     60 
     61 extern zio_checksum_t fletcher_2_byteswap;
     62 extern zio_checksum_t fletcher_4_byteswap;
     63 extern zio_checksum_t fletcher_4_incremental_byteswap;
     64 
     65 extern zio_checksum_t zio_checksum_SHA256;
     66 
     67 extern void zio_checksum(uint_t checksum, zio_cksum_t *zcp,
     68     void *data, uint64_t size);
     69 extern int zio_checksum_error(zio_t *zio);
     70 
     71 #ifdef	__cplusplus
     72 }
     73 #endif
     74 
     75 #endif	/* _SYS_ZIO_CHECKSUM_H */
     76