1168404Spjd/* 2168404Spjd * CDDL HEADER START 3168404Spjd * 4168404Spjd * The contents of this file are subject to the terms of the 5168404Spjd * Common Development and Distribution License (the "License"). 6168404Spjd * You may not use this file except in compliance with the License. 7168404Spjd * 8168404Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9168404Spjd * or http://www.opensolaris.org/os/licensing. 10168404Spjd * See the License for the specific language governing permissions 11168404Spjd * and limitations under the License. 12168404Spjd * 13168404Spjd * When distributing Covered Code, include this CDDL HEADER in each 14168404Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15168404Spjd * If applicable, add the following below this CDDL HEADER, with the 16168404Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17168404Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18168404Spjd * 19168404Spjd * CDDL HEADER END 20168404Spjd */ 21168404Spjd/* 22219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23168404Spjd */ 24168404Spjd 25168404Spjd#ifndef _SYS_ZIO_CHECKSUM_H 26168404Spjd#define _SYS_ZIO_CHECKSUM_H 27168404Spjd 28168404Spjd#include <sys/zio.h> 29168404Spjd 30168404Spjd#ifdef __cplusplus 31168404Spjdextern "C" { 32168404Spjd#endif 33168404Spjd 34168404Spjd/* 35168404Spjd * Signature for checksum functions. 36168404Spjd */ 37168404Spjdtypedef void zio_checksum_t(const void *data, uint64_t size, zio_cksum_t *zcp); 38168404Spjd 39168404Spjd/* 40168404Spjd * Information about each checksum function. 41168404Spjd */ 42168404Spjdtypedef struct zio_checksum_info { 43168404Spjd zio_checksum_t *ci_func[2]; /* checksum function for each byteorder */ 44168404Spjd int ci_correctable; /* number of correctable bits */ 45219089Spjd int ci_eck; /* uses zio embedded checksum? */ 46219089Spjd int ci_dedup; /* strong enough for dedup? */ 47168404Spjd char *ci_name; /* descriptive name */ 48168404Spjd} zio_checksum_info_t; 49168404Spjd 50219089Spjdtypedef struct zio_bad_cksum { 51219089Spjd zio_cksum_t zbc_expected; 52219089Spjd zio_cksum_t zbc_actual; 53219089Spjd const char *zbc_checksum_name; 54219089Spjd uint8_t zbc_byteswapped; 55219089Spjd uint8_t zbc_injected; 56219089Spjd uint8_t zbc_has_cksum; /* expected/actual valid */ 57219089Spjd} zio_bad_cksum_t; 58219089Spjd 59168404Spjdextern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS]; 60168404Spjd 61168404Spjd/* 62168404Spjd * Checksum routines. 63168404Spjd */ 64168404Spjdextern zio_checksum_t zio_checksum_SHA256; 65168404Spjd 66185029Spjdextern void zio_checksum_compute(zio_t *zio, enum zio_checksum checksum, 67168404Spjd void *data, uint64_t size); 68219089Spjdextern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out); 69219089Spjdextern enum zio_checksum spa_dedup_checksum(spa_t *spa); 70168404Spjd 71168404Spjd#ifdef __cplusplus 72168404Spjd} 73168404Spjd#endif 74168404Spjd 75168404Spjd#endif /* _SYS_ZIO_CHECKSUM_H */ 76