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1eeb4562 JX |
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 _SPA_CHECKSUM_H | |
27 | #define _SPA_CHECKSUM_H | |
28 | ||
29 | #include <sys/types.h> | |
30 | ||
31 | #ifdef __cplusplus | |
32 | extern "C" { | |
33 | #endif | |
34 | ||
35 | /* | |
36 | * Each block has a 256-bit checksum -- strong enough for cryptographic hashes. | |
37 | */ | |
38 | typedef struct zio_cksum { | |
39 | uint64_t zc_word[4]; | |
40 | } zio_cksum_t; | |
41 | ||
42 | #define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \ | |
43 | { \ | |
44 | (zcp)->zc_word[0] = w0; \ | |
45 | (zcp)->zc_word[1] = w1; \ | |
46 | (zcp)->zc_word[2] = w2; \ | |
47 | (zcp)->zc_word[3] = w3; \ | |
48 | } | |
49 | ||
50 | #define ZIO_CHECKSUM_EQUAL(zc1, zc2) \ | |
51 | (0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \ | |
52 | ((zc1).zc_word[1] - (zc2).zc_word[1]) | \ | |
53 | ((zc1).zc_word[2] - (zc2).zc_word[2]) | \ | |
54 | ((zc1).zc_word[3] - (zc2).zc_word[3]))) | |
55 | ||
56 | #define ZIO_CHECKSUM_IS_ZERO(zc) \ | |
57 | (0 == ((zc)->zc_word[0] | (zc)->zc_word[1] | \ | |
58 | (zc)->zc_word[2] | (zc)->zc_word[3])) | |
59 | ||
60 | #define ZIO_CHECKSUM_BSWAP(zcp) \ | |
61 | { \ | |
62 | (zcp)->zc_word[0] = BSWAP_64((zcp)->zc_word[0]); \ | |
63 | (zcp)->zc_word[1] = BSWAP_64((zcp)->zc_word[1]); \ | |
64 | (zcp)->zc_word[2] = BSWAP_64((zcp)->zc_word[2]); \ | |
65 | (zcp)->zc_word[3] = BSWAP_64((zcp)->zc_word[3]); \ | |
66 | } | |
67 | ||
68 | #ifdef __cplusplus | |
69 | } | |
70 | #endif | |
71 | ||
72 | #endif |