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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #ifndef _SYS_ZIO_CHECKSUM_H 26 #define _SYS_ZIO_CHECKSUM_H 27 28 #include <sys/zio.h> 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 /* 35 * Signature for checksum functions. 36 */ 37 typedef void zio_checksum_t(const void *data, uint64_t size, zio_cksum_t *zcp); 38 39 /* 40 * Information about each checksum function. 41 */ 42 typedef struct zio_checksum_info { 43 zio_checksum_t *ci_func[2]; /* checksum function for each byteorder */ 44 int ci_correctable; /* number of correctable bits */ 45 int ci_eck; /* uses zio embedded checksum? */ 46 int ci_dedup; /* strong enough for dedup? */ 47 char *ci_name; /* descriptive name */ 48 } zio_checksum_info_t; 49 50 typedef struct zio_bad_cksum { 51 zio_cksum_t zbc_expected; 52 zio_cksum_t zbc_actual; 53 const char *zbc_checksum_name; 54 uint8_t zbc_byteswapped; 55 uint8_t zbc_injected; 56 uint8_t zbc_has_cksum; /* expected/actual valid */ 57 } zio_bad_cksum_t; 58 59 extern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS]; 60 61 /* 62 * Checksum routines. 63 */ 64 extern zio_checksum_t zio_checksum_SHA256; 65 66 extern void zio_checksum_compute(zio_t *zio, enum zio_checksum checksum, 67 void *data, uint64_t size); 68 extern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out); 69 extern enum zio_checksum spa_dedup_checksum(spa_t *spa); 70 71 #ifdef __cplusplus 72 } 73 #endif 74 75 #endif /* _SYS_ZIO_CHECKSUM_H */ 76