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diff --git a/fs/xfs/linux-2.6/xfs_export.h b/fs/xfs/linux-2.6/xfs_export.h
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+/*
+ * Copyright (c) 2005 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_EXPORT_H__
+#define __XFS_EXPORT_H__
+
+/*
+ * Common defines for code related to exporting XFS filesystems over NFS.
+ *
+ * The NFS fileid goes out on the wire as an array of
+ * 32bit unsigned ints in host order.  There are 5 possible
+ * formats.
+ *
+ * (1)  fileid_type=0x00
+ *      (no fileid data; handled by the generic code)
+ *
+ * (2)  fileid_type=0x01
+ *      inode-num
+ *      generation
+ *
+ * (3)  fileid_type=0x02
+ *      inode-num
+ *      generation
+ *      parent-inode-num
+ *      parent-generation
+ *
+ * (4)  fileid_type=0x81
+ *      inode-num-lo32
+ *      inode-num-hi32
+ *      generation
+ *
+ * (5)  fileid_type=0x82
+ *      inode-num-lo32
+ *      inode-num-hi32
+ *      generation
+ *      parent-inode-num-lo32
+ *      parent-inode-num-hi32
+ *      parent-generation
+ *
+ * Note, the NFS filehandle also includes an fsid portion which
+ * may have an inode number in it.  That number is hardcoded to
+ * 32bits and there is no way for XFS to intercept it.  In
+ * practice this means when exporting an XFS filesytem with 64bit
+ * inodes you should either export the mountpoint (rather than
+ * a subdirectory) or use the "fsid" export option.
+ */
+
+/* This flag goes on the wire.  Don't play with it. */
+#define XFS_FILEID_TYPE_64FLAG  0x80    /* NFS fileid has 64bit inodes */
+
+/* Calculate the length in u32 units of the fileid data */
+static inline int
+xfs_fileid_length(int hasparent, int is64)
+{
+        return hasparent ? (is64 ? 6 : 4) : (is64 ? 3 : 2);
+}
+
+/*
+ * Decode encoded inode information (either for the inode itself
+ * or the parent) into an xfs_fid2_t structure.  Advances and
+ * returns the new data pointer
+ */
+static inline __u32 *
+xfs_fileid_decode_fid2(__u32 *p, xfs_fid2_t *fid, int is64)
+{
+        fid->fid_len = sizeof(xfs_fid2_t) - sizeof(fid->fid_len);
+        fid->fid_pad = 0;
+        fid->fid_ino = *p++;
+#if XFS_BIG_INUMS
+        if (is64)
+                fid->fid_ino |= (((__u64)(*p++)) << 32);
+#endif
+        fid->fid_gen = *p++;
+        return p;
+}
+
+/*
+ * Encode inode information (either for the inode itself or the
+ * parent) into a fileid buffer.  Advances and returns the new
+ * data pointer.
+ */
+static inline __u32 *
+xfs_fileid_encode_inode(__u32 *p, struct inode *inode, int is64)
+{
+        *p++ = (__u32)inode->i_ino;
+#if XFS_BIG_INUMS
+        if (is64)
+                *p++ = (__u32)(inode->i_ino >> 32);
+#endif
+        *p++ = inode->i_generation;
+        return p;
+}
+
+#endif  /* __XFS_EXPORT_H__ */