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 const 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 */