1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 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 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SPA_CHECKSUM_H 28 #define _SPA_CHECKSUM_H 29 30 #include <sys/types.h> 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 /* 37 * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. 38 */ 39 typedef struct zio_cksum { 40 uint64_t zc_word[4]; 41 } zio_cksum_t; 42 43 #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ 44 { \ 45 (zcp)->zc_word[0] = w0; \ 46 (zcp)->zc_word[1] = w1; \ 47 (zcp)->zc_word[2] = w2; \ 48 (zcp)->zc_word[3] = w3; \ 49 } 50 51 #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ 52 (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ 53 ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ 54 ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ 55 ((zc1).zc_word[3] - (zc2).zc_word[3]))) 56 57 #define ZIO_CHECKSUM_IS_ZERO(zc) \ 58 (0 == ((zc)->zc_word[0] | (zc)->zc_word[1] | \ 59 (zc)->zc_word[2] | (zc)->zc_word[3])) 60 61 #define ZIO_CHECKSUM_BSWAP(zcp) \ 62 { \ 63 (zcp)->zc_word[0] = BSWAP_64((zcp)->zc_word[0]); \ 64 (zcp)->zc_word[1] = BSWAP_64((zcp)->zc_word[1]); \ 65 (zcp)->zc_word[2] = BSWAP_64((zcp)->zc_word[2]); \ 66 (zcp)->zc_word[3] = BSWAP_64((zcp)->zc_word[3]); \ 67 } 68 69 #ifdef __cplusplus 70 } 71 #endif 72 73 #endif 74