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4d3c95f5 JL |
1 | /* |
2 | * GRUB -- GRand Unified Bootloader | |
3 | * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | /* | |
20 | * Copyright 2007 Sun Microsystems, Inc. All rights reserved. | |
21 | * Use is subject to license terms. | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | #include <malloc.h> | |
26 | #include <linux/stat.h> | |
27 | #include <linux/time.h> | |
28 | #include <linux/ctype.h> | |
29 | #include <asm/byteorder.h> | |
30 | #include "zfs_common.h" | |
31 | ||
32 | #include <zfs/zfs.h> | |
33 | #include <zfs/zio.h> | |
34 | #include <zfs/dnode.h> | |
35 | #include <zfs/uberblock_impl.h> | |
36 | #include <zfs/vdev_impl.h> | |
37 | #include <zfs/zio_checksum.h> | |
38 | #include <zfs/zap_impl.h> | |
39 | #include <zfs/zap_leaf.h> | |
40 | #include <zfs/zfs_znode.h> | |
41 | #include <zfs/dmu.h> | |
42 | #include <zfs/dmu_objset.h> | |
43 | #include <zfs/dsl_dir.h> | |
44 | #include <zfs/dsl_dataset.h> | |
45 | ||
46 | void | |
47 | fletcher_2_endian(const void *buf, uint64_t size, | |
48 | zfs_endian_t endian, | |
49 | zio_cksum_t *zcp) | |
50 | { | |
51 | const uint64_t *ip = buf; | |
52 | const uint64_t *ipend = ip + (size / sizeof(uint64_t)); | |
53 | uint64_t a0, b0, a1, b1; | |
54 | ||
55 | for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { | |
56 | a0 += zfs_to_cpu64(ip[0], endian); | |
57 | a1 += zfs_to_cpu64(ip[1], endian); | |
58 | b0 += a0; | |
59 | b1 += a1; | |
60 | } | |
61 | ||
62 | zcp->zc_word[0] = cpu_to_zfs64(a0, endian); | |
63 | zcp->zc_word[1] = cpu_to_zfs64(a1, endian); | |
64 | zcp->zc_word[2] = cpu_to_zfs64(b0, endian); | |
65 | zcp->zc_word[3] = cpu_to_zfs64(b1, endian); | |
66 | } | |
67 | ||
68 | void | |
69 | fletcher_4_endian(const void *buf, uint64_t size, zfs_endian_t endian, | |
70 | zio_cksum_t *zcp) | |
71 | { | |
72 | const uint32_t *ip = buf; | |
73 | const uint32_t *ipend = ip + (size / sizeof(uint32_t)); | |
74 | uint64_t a, b, c, d; | |
75 | ||
76 | for (a = b = c = d = 0; ip < ipend; ip++) { | |
77 | a += zfs_to_cpu32(ip[0], endian); | |
78 | b += a; | |
79 | c += b; | |
80 | d += c; | |
81 | } | |
82 | ||
83 | zcp->zc_word[0] = cpu_to_zfs64(a, endian); | |
84 | zcp->zc_word[1] = cpu_to_zfs64(b, endian); | |
85 | zcp->zc_word[2] = cpu_to_zfs64(c, endian); | |
86 | zcp->zc_word[3] = cpu_to_zfs64(d, endian); | |
87 | } |