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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_MD_CRC_H
#define _SYS_MD_CRC_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
/* md_crc.c */
/*
* Structure to hold fields to be skipped when calculating the checksum
*/
typedef struct crc_skip {
struct crc_skip *skip_next;
int skip_offset;
int skip_size;
} crc_skip_t;
extern uint_t crcfunc(uint_t check,
uchar_t *record,
uint_t *result,
size_t size,
crc_skip_t *skip);
extern void crcfreetab(void);
/*
* The following crc defines allow for a number of areas to be skipped
* (not be included in the data being crc'd) in the record
* block (mddb_rb_32). These areas are the 12 byte area covering
* rb_checksum_fiddle, rb_private and rb_userdata
*
* In addition the skipped areas include the timestamps in the crc for
* MN disksets.
*/
#ifndef DEBUG
#define crcgen(record, result, size, skip) \
(void) crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
(size_t)(size), (crc_skip_t *)(skip))
#else /* DEBUG */
#ifdef _KERNEL
#define crcgen(record, result, size, skip) {\
uint_t b = crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
(size_t)(size), (crc_skip_t *)(skip)); \
(void) crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
(size_t)(size), (crc_skip_t *)(skip)); \
ASSERT (*((uint_t *)(result)) == b); \
}
#else /* !_KERNEL */
#define crcgen(record, result, size, skip) {\
uint_t b = crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
(size_t)(size), (crc_skip_t *)(skip)); \
(void) crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
(size_t)(size), (crc_skip_t *)(skip)); \
assert (*((uint_t *)(result)) == b); \
}
#endif /* _KERNEL */
#endif /* DEBUG */
#define crcchk(record, result, size, skip) crcfunc(1, (uchar_t *)(record), \
(uint_t *)(result), (size_t)(size), (crc_skip_t *)(skip))
#ifdef __cplusplus
}
#endif
#endif /* _SYS_MD_CRC_H */
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