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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
25 #ifndef _SYS_ZIO_CHECKSUM_H
26 #define _SYS_ZIO_CHECKSUM_H
35 * Signature for checksum functions.
37 typedef void zio_checksum_t(const void *data
, uint64_t size
, zio_cksum_t
*zcp
);
40 * Information about each checksum function.
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
;
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
;
56 uint8_t zbc_has_cksum
; /* expected/actual valid */
59 extern zio_checksum_info_t zio_checksum_table
[ZIO_CHECKSUM_FUNCTIONS
];
64 extern zio_checksum_t zio_checksum_SHA256
;
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
);
75 #endif /* _SYS_ZIO_CHECKSUM_H */