1 /* 2 * GRUB -- GRand Unified Bootloader 3 * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 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 } 76