1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22*cde58dbcSMatthew Ahrens * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23fa9e4066Sahrens */ 24fa9e4066Sahrens 25fa9e4066Sahrens #ifndef _SYS_ZIO_CHECKSUM_H 26fa9e4066Sahrens #define _SYS_ZIO_CHECKSUM_H 27fa9e4066Sahrens 28fa9e4066Sahrens #include <sys/zio.h> 29fa9e4066Sahrens 30fa9e4066Sahrens #ifdef __cplusplus 31fa9e4066Sahrens extern "C" { 32fa9e4066Sahrens #endif 33fa9e4066Sahrens 34fa9e4066Sahrens /* 35fa9e4066Sahrens * Signature for checksum functions. 36fa9e4066Sahrens */ 37fa9e4066Sahrens typedef void zio_checksum_t(const void *data, uint64_t size, zio_cksum_t *zcp); 38fa9e4066Sahrens 39fa9e4066Sahrens /* 40fa9e4066Sahrens * Information about each checksum function. 41fa9e4066Sahrens */ 42fa9e4066Sahrens typedef struct zio_checksum_info { 43fa9e4066Sahrens zio_checksum_t *ci_func[2]; /* checksum function for each byteorder */ 44fa9e4066Sahrens int ci_correctable; /* number of correctable bits */ 456e1f5caaSNeil Perrin int ci_eck; /* uses zio embedded checksum? */ 46b24ab676SJeff Bonwick int ci_dedup; /* strong enough for dedup? */ 47fa9e4066Sahrens char *ci_name; /* descriptive name */ 48fa9e4066Sahrens } zio_checksum_info_t; 49fa9e4066Sahrens 5022fe2c88SJonathan Adams typedef struct zio_bad_cksum { 5122fe2c88SJonathan Adams zio_cksum_t zbc_expected; 5222fe2c88SJonathan Adams zio_cksum_t zbc_actual; 5322fe2c88SJonathan Adams const char *zbc_checksum_name; 5422fe2c88SJonathan Adams uint8_t zbc_byteswapped; 5522fe2c88SJonathan Adams uint8_t zbc_injected; 5622fe2c88SJonathan Adams uint8_t zbc_has_cksum; /* expected/actual valid */ 5722fe2c88SJonathan Adams } zio_bad_cksum_t; 5822fe2c88SJonathan Adams 59fa9e4066Sahrens extern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS]; 60fa9e4066Sahrens 61fa9e4066Sahrens /* 62fa9e4066Sahrens * Checksum routines. 63fa9e4066Sahrens */ 64fa9e4066Sahrens extern zio_checksum_t zio_checksum_SHA256; 65fa9e4066Sahrens 66e14bb325SJeff Bonwick extern void zio_checksum_compute(zio_t *zio, enum zio_checksum checksum, 67fa9e4066Sahrens void *data, uint64_t size); 6822fe2c88SJonathan Adams extern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out); 69*cde58dbcSMatthew Ahrens extern enum zio_checksum spa_dedup_checksum(spa_t *spa); 70fa9e4066Sahrens 71fa9e4066Sahrens #ifdef __cplusplus 72fa9e4066Sahrens } 73fa9e4066Sahrens #endif 74fa9e4066Sahrens 75fa9e4066Sahrens #endif /* _SYS_ZIO_CHECKSUM_H */ 76