zfs: Add ZFS filesystem support
U-Boot port is based on sources forked from GRUB-0.97 by Sun in 2004,
which can be found here:
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/grub/grub-0.97/stage2/zfs-include/zfs.h
Released by Sun for GRUB under the license:
* This program 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 2 of the License, or
* (at your option) any later version.
GRUB official releases include ZFS in version:
ftp://alpha.gnu.org/gnu/grub/grub-1.99~rc1.tar.gz
And patched against GRUB Bazaar repository for ashift fixes (4KB HDDs)
more conveniently found at github:
https://github.com/pendor/grub-zfs/commit/e7b6ef3ac3b9685ac4c394c897b1d4221b7381f1
Signed-off-by: Jorgen Lundman <lundman@lundman.net>
diff --git a/fs/zfs/zfs_fletcher.c b/fs/zfs/zfs_fletcher.c
new file mode 100644
index 0000000..08f708c
--- /dev/null
+++ b/fs/zfs/zfs_fletcher.c
@@ -0,0 +1,87 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <linux/stat.h>
+#include <linux/time.h>
+#include <linux/ctype.h>
+#include <asm/byteorder.h>
+#include "zfs_common.h"
+
+#include <zfs/zfs.h>
+#include <zfs/zio.h>
+#include <zfs/dnode.h>
+#include <zfs/uberblock_impl.h>
+#include <zfs/vdev_impl.h>
+#include <zfs/zio_checksum.h>
+#include <zfs/zap_impl.h>
+#include <zfs/zap_leaf.h>
+#include <zfs/zfs_znode.h>
+#include <zfs/dmu.h>
+#include <zfs/dmu_objset.h>
+#include <zfs/dsl_dir.h>
+#include <zfs/dsl_dataset.h>
+
+void
+fletcher_2_endian(const void *buf, uint64_t size,
+ zfs_endian_t endian,
+ zio_cksum_t *zcp)
+{
+ const uint64_t *ip = buf;
+ const uint64_t *ipend = ip + (size / sizeof(uint64_t));
+ uint64_t a0, b0, a1, b1;
+
+ for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
+ a0 += zfs_to_cpu64(ip[0], endian);
+ a1 += zfs_to_cpu64(ip[1], endian);
+ b0 += a0;
+ b1 += a1;
+ }
+
+ zcp->zc_word[0] = cpu_to_zfs64(a0, endian);
+ zcp->zc_word[1] = cpu_to_zfs64(a1, endian);
+ zcp->zc_word[2] = cpu_to_zfs64(b0, endian);
+ zcp->zc_word[3] = cpu_to_zfs64(b1, endian);
+}
+
+void
+fletcher_4_endian(const void *buf, uint64_t size, zfs_endian_t endian,
+ zio_cksum_t *zcp)
+{
+ const uint32_t *ip = buf;
+ const uint32_t *ipend = ip + (size / sizeof(uint32_t));
+ uint64_t a, b, c, d;
+
+ for (a = b = c = d = 0; ip < ipend; ip++) {
+ a += zfs_to_cpu32(ip[0], endian);
+ b += a;
+ c += b;
+ d += c;
+ }
+
+ zcp->zc_word[0] = cpu_to_zfs64(a, endian);
+ zcp->zc_word[1] = cpu_to_zfs64(b, endian);
+ zcp->zc_word[2] = cpu_to_zfs64(c, endian);
+ zcp->zc_word[3] = cpu_to_zfs64(d, endian);
+}