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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_MD_CRC_H 28 #define _SYS_MD_CRC_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/types.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /* md_crc.c */ 39 /* 40 * Structure to hold fields to be skipped when calculating the checksum 41 */ 42 typedef struct crc_skip { 43 struct crc_skip *skip_next; 44 int skip_offset; 45 int skip_size; 46 } crc_skip_t; 47 48 extern uint_t crcfunc(uint_t check, 49 uchar_t *record, 50 uint_t *result, 51 size_t size, 52 crc_skip_t *skip); 53 extern void crcfreetab(void); 54 55 /* 56 * The following crc defines allow for a number of areas to be skipped 57 * (not be included in the data being crc'd) in the record 58 * block (mddb_rb_32). These areas are the 12 byte area covering 59 * rb_checksum_fiddle, rb_private and rb_userdata 60 * 61 * In addition the skipped areas include the timestamps in the crc for 62 * MN disksets. 63 */ 64 #ifndef DEBUG 65 #define crcgen(record, result, size, skip) \ 66 (void) crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \ 67 (size_t)(size), (crc_skip_t *)(skip)) 68 69 #else /* DEBUG */ 70 71 #ifdef _KERNEL 72 #define crcgen(record, result, size, skip) {\ 73 uint_t b = crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \ 74 (size_t)(size), (crc_skip_t *)(skip)); \ 75 (void) crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \ 76 (size_t)(size), (crc_skip_t *)(skip)); \ 77 ASSERT (*((uint_t *)(result)) == b); \ 78 } 79 #else /* !_KERNEL */ 80 #define crcgen(record, result, size, skip) {\ 81 uint_t b = crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \ 82 (size_t)(size), (crc_skip_t *)(skip)); \ 83 (void) crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \ 84 (size_t)(size), (crc_skip_t *)(skip)); \ 85 assert (*((uint_t *)(result)) == b); \ 86 } 87 #endif /* _KERNEL */ 88 #endif /* DEBUG */ 89 90 #define crcchk(record, result, size, skip) crcfunc(1, (uchar_t *)(record), \ 91 (uint_t *)(result), (size_t)(size), (crc_skip_t *)(skip)) 92 93 #ifdef __cplusplus 94 } 95 #endif 96 97 #endif /* _SYS_MD_CRC_H */ 98