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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SPA_CHECKSUM_H 27 #define _SPA_CHECKSUM_H 28 29 #include <sys/types.h> 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 /* 36 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 37 */ 38 typedef struct zio_cksum { 39 uint64_t zc_word[4]; 40 } zio_cksum_t; 41 42 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 43 { \ 44 (zcp)->zc_word[0] = w0; \ 45 (zcp)->zc_word[1] = w1; \ 46 (zcp)->zc_word[2] = w2; \ 47 (zcp)->zc_word[3] = w3; \ 48 } 49 50 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 51 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 52 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 53 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 54 ((zc1).zc_word[3] - (zc2).zc_word[3]))) 55 56 #define ZIO_CHECKSUM_IS_ZERO(zc) \ 57 (0 == ((zc)->zc_word[0] | (zc)->zc_word[1] | \ 58 (zc)->zc_word[2] | (zc)->zc_word[3])) 59 60 #define ZIO_CHECKSUM_BSWAP(zcp) \ 61 { \ 62 (zcp)->zc_word[0] = BSWAP_64((zcp)->zc_word[0]); \ 63 (zcp)->zc_word[1] = BSWAP_64((zcp)->zc_word[1]); \ 64 (zcp)->zc_word[2] = BSWAP_64((zcp)->zc_word[2]); \ 65 (zcp)->zc_word[3] = BSWAP_64((zcp)->zc_word[3]); \ 66 } 67 68 #ifdef __cplusplus 69 } 70 #endif 71 72 #endif /* _SPA_CHECKSUM_H */ 73