1 files changed, 84 insertions, 0 deletions
diff --git a/grub-core/fs/zfs/zfs_fletcher.c b/grub-core/fs/zfs/zfs_fletcher.c
new file mode 100644
index 0000000..7d27b05
--- /dev/null
+++ b/grub-core/fs/zfs/zfs_fletcher.c
@@ -0,0 +1,84 @@
+/*
+ *  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);
+}
+