spa_checksum.h

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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 https://opensource.org/licenses/CDDL-1.0.
   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

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/include/sys/spa_checksum.h

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/spa_checksum.h