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>

1 files changed, 71 insertions, 0 deletions

diff --git a/include/zfs/zfs_znode.h b/include/zfs/zfs_znode.h
new file mode 100644
index 0000000..2267aca
--- /dev/null
+++ b/include/zfs/zfs_znode.h
@@ -0,0 +1,71 @@
+/*
+ *  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 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_SYS_FS_ZFS_ZNODE_H
+#define	_SYS_FS_ZFS_ZNODE_H
+
+#include <zfs/zfs_acl.h>
+
+#define	MASTER_NODE_OBJ	1
+#define	ZFS_ROOT_OBJ		"ROOT"
+#define	ZPL_VERSION_STR		"VERSION"
+#define	ZFS_SA_ATTRS		"SA_ATTRS"
+
+#define	ZPL_VERSION		5ULL
+
+#define	ZFS_DIRENT_OBJ(de) BF64_GET(de, 0, 48)
+
+/*
+ * This is the persistent portion of the znode.  It is stored
+ * in the "bonus buffer" of the file.  Short symbolic links
+ * are also stored in the bonus buffer.
+ */
+typedef struct znode_phys {
+	uint64_t zp_atime[2];      /*  0 - last file access time */
+	uint64_t zp_mtime[2];	/* 16 - last file modification time */
+	uint64_t zp_ctime[2];	/* 32 - last file change time */
+	uint64_t zp_crtime[2];	/* 48 - creation time */
+	uint64_t zp_gen;		/* 64 - generation (txg of creation) */
+	uint64_t zp_mode;		/* 72 - file mode bits */
+	uint64_t zp_size;		/* 80 - size of file */
+	uint64_t zp_parent;	/* 88 - directory parent (`..') */
+	uint64_t zp_links;		/* 96 - number of links to file */
+	uint64_t zp_xattr;		/* 104 - DMU object for xattrs */
+	uint64_t zp_rdev;		/* 112 - dev_t for VBLK & VCHR files */
+	uint64_t zp_flags;		/* 120 - persistent flags */
+	uint64_t zp_uid;		/* 128 - file owner */
+	uint64_t zp_gid;		/* 136 - owning group */
+	uint64_t zp_pad[4];	/* 144 - future */
+	zfs_znode_acl_t zp_acl;		/* 176 - 263 ACL */
+	/*
+	 * Data may pad out any remaining bytes in the znode buffer, eg:
+	 *
+	 * |<---------------------- dnode_phys (512) ------------------------>|
+	 * |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->|
+	 *			|<---- znode (264) ---->|<---- data (56) ---->|
+	 *
+	 * At present, we only use this space to store symbolic links.
+	 */
+} znode_phys_t;
+
+#endif	/* _SYS_FS_ZFS_ZNODE_H */