| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 1999,2000,2001,2002,2003,2004,2009 Free Software Foundation, Inc. |
| * Copyright 2007 Sun Microsystems, Inc. |
| * |
| * GRUB is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * GRUB is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with GRUB. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <grub/err.h> |
| #include <grub/file.h> |
| #include <grub/mm.h> |
| #include <grub/misc.h> |
| #include <grub/disk.h> |
| #include <grub/dl.h> |
| #include <grub/types.h> |
| #include <grub/zfs/zfs.h> |
| #include <grub/zfs/zio.h> |
| #include <grub/zfs/dnode.h> |
| #include <grub/zfs/uberblock_impl.h> |
| #include <grub/zfs/vdev_impl.h> |
| #include <grub/zfs/zio_checksum.h> |
| #include <grub/zfs/zap_impl.h> |
| #include <grub/zfs/zap_leaf.h> |
| #include <grub/zfs/zfs_znode.h> |
| #include <grub/zfs/dmu.h> |
| #include <grub/zfs/dmu_objset.h> |
| #include <grub/zfs/dsl_dir.h> |
| #include <grub/zfs/dsl_dataset.h> |
| |
| void |
| fletcher_2(const void *buf, grub_uint64_t size, grub_zfs_endian_t endian, |
| zio_cksum_t *zcp) |
| { |
| const grub_uint64_t *ip = buf; |
| const grub_uint64_t *ipend = ip + (size / sizeof (grub_uint64_t)); |
| grub_uint64_t a0, b0, a1, b1; |
| |
| for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) |
| { |
| a0 += grub_zfs_to_cpu64 (ip[0], endian); |
| a1 += grub_zfs_to_cpu64 (ip[1], endian); |
| b0 += a0; |
| b1 += a1; |
| } |
| |
| zcp->zc_word[0] = grub_cpu_to_zfs64 (a0, endian); |
| zcp->zc_word[1] = grub_cpu_to_zfs64 (a1, endian); |
| zcp->zc_word[2] = grub_cpu_to_zfs64 (b0, endian); |
| zcp->zc_word[3] = grub_cpu_to_zfs64 (b1, endian); |
| } |
| |
| void |
| fletcher_4 (const void *buf, grub_uint64_t size, grub_zfs_endian_t endian, |
| zio_cksum_t *zcp) |
| { |
| const grub_uint32_t *ip = buf; |
| const grub_uint32_t *ipend = ip + (size / sizeof (grub_uint32_t)); |
| grub_uint64_t a, b, c, d; |
| |
| for (a = b = c = d = 0; ip < ipend; ip++) |
| { |
| a += grub_zfs_to_cpu32 (ip[0], endian);; |
| b += a; |
| c += b; |
| d += c; |
| } |
| |
| zcp->zc_word[0] = grub_cpu_to_zfs64 (a, endian); |
| zcp->zc_word[1] = grub_cpu_to_zfs64 (b, endian); |
| zcp->zc_word[2] = grub_cpu_to_zfs64 (c, endian); |
| zcp->zc_word[3] = grub_cpu_to_zfs64 (d, endian); |
| } |
| |