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 } 88