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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 | * | |
1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
4d3c95f5 JL |
6 | */ |
7 | /* | |
8 | * Copyright 2007 Sun Microsystems, Inc. All rights reserved. | |
9 | * Use is subject to license terms. | |
10 | */ | |
11 | ||
12 | #include <common.h> | |
13 | #include <malloc.h> | |
14 | #include <linux/stat.h> | |
15 | #include <linux/time.h> | |
16 | #include <linux/ctype.h> | |
17 | #include <asm/byteorder.h> | |
18 | #include "zfs_common.h" | |
19 | ||
20 | #include <zfs/zfs.h> | |
21 | #include <zfs/zio.h> | |
22 | #include <zfs/dnode.h> | |
23 | #include <zfs/uberblock_impl.h> | |
24 | #include <zfs/vdev_impl.h> | |
25 | #include <zfs/zio_checksum.h> | |
26 | #include <zfs/zap_impl.h> | |
27 | #include <zfs/zap_leaf.h> | |
28 | #include <zfs/zfs_znode.h> | |
29 | #include <zfs/dmu.h> | |
30 | #include <zfs/dmu_objset.h> | |
31 | #include <zfs/dsl_dir.h> | |
32 | #include <zfs/dsl_dataset.h> | |
33 | ||
34 | void | |
35 | fletcher_2_endian(const void *buf, uint64_t size, | |
36 | zfs_endian_t endian, | |
37 | zio_cksum_t *zcp) | |
38 | { | |
39 | const uint64_t *ip = buf; | |
40 | const uint64_t *ipend = ip + (size / sizeof(uint64_t)); | |
41 | uint64_t a0, b0, a1, b1; | |
42 | ||
43 | for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) { | |
44 | a0 += zfs_to_cpu64(ip[0], endian); | |
45 | a1 += zfs_to_cpu64(ip[1], endian); | |
46 | b0 += a0; | |
47 | b1 += a1; | |
48 | } | |
49 | ||
50 | zcp->zc_word[0] = cpu_to_zfs64(a0, endian); | |
51 | zcp->zc_word[1] = cpu_to_zfs64(a1, endian); | |
52 | zcp->zc_word[2] = cpu_to_zfs64(b0, endian); | |
53 | zcp->zc_word[3] = cpu_to_zfs64(b1, endian); | |
54 | } | |
55 | ||
56 | void | |
57 | fletcher_4_endian(const void *buf, uint64_t size, zfs_endian_t endian, | |
58 | zio_cksum_t *zcp) | |
59 | { | |
60 | const uint32_t *ip = buf; | |
61 | const uint32_t *ipend = ip + (size / sizeof(uint32_t)); | |
62 | uint64_t a, b, c, d; | |
63 | ||
64 | for (a = b = c = d = 0; ip < ipend; ip++) { | |
65 | a += zfs_to_cpu32(ip[0], endian); | |
66 | b += a; | |
67 | c += b; | |
68 | d += c; | |
69 | } | |
70 | ||
71 | zcp->zc_word[0] = cpu_to_zfs64(a, endian); | |
72 | zcp->zc_word[1] = cpu_to_zfs64(b, endian); | |
73 | zcp->zc_word[2] = cpu_to_zfs64(c, endian); | |
74 | zcp->zc_word[3] = cpu_to_zfs64(d, endian); | |
75 | } |