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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_ZIO_CHECKSUM_H 27 #define _SYS_ZIO_CHECKSUM_H 28 29 #include <sys/zio.h> 30 #include <zfs_fletcher.h> 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 /* 37 * Signature for checksum functions. 38 */ 39 typedef void zio_checksum_t(const void *data, uint64_t size, zio_cksum_t *zcp); 40 41 /* 42 * Information about each checksum function. 43 */ 44 typedef struct zio_checksum_info { 45 zio_checksum_t *ci_func[2]; /* checksum function for each byteorder */ 46 int ci_correctable; /* number of correctable bits */ 47 int ci_zbt; /* uses zio block tail? */ 48 int ci_dedup; /* strong enough for dedup? */ 49 char *ci_name; /* descriptive name */ 50 } zio_checksum_info_t; 51 52 typedef struct zio_bad_cksum { 53 zio_cksum_t zbc_expected; 54 zio_cksum_t zbc_actual; 55 const char *zbc_checksum_name; 56 uint8_t zbc_byteswapped; 57 uint8_t zbc_injected; 58 uint8_t zbc_has_cksum; /* expected/actual valid */ 59 } zio_bad_cksum_t; 60 61 extern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS]; 62 63 /* 64 * Checksum routines. 65 */ 66 extern zio_checksum_t zio_checksum_SHA256; 67 68 extern void zio_checksum_compute(zio_t *zio, enum zio_checksum checksum, 69 void *data, uint64_t size); 70 extern int zio_checksum_error(zio_t *zio, zio_bad_cksum_t *out); 71 72 #ifdef __cplusplus 73 } 74 #endif 75 76 #endif /* _SYS_ZIO_CHECKSUM_H */ 77