--- a/usr/src/uts/common/fs/nfs/nfs3_xdr.c	Thu Mar 16 16:31:10 2006 -0800
+++ b/usr/src/uts/common/fs/nfs/nfs3_xdr.c	Thu Mar 16 20:37:07 2006 -0800
@@ -458,7 +458,10 @@
 {
 	switch (xdrs->x_op) {
 	case XDR_ENCODE:
-		return (xdr_encode_nfs_fh3(xdrs, objp));
+		if (objp->fh3_flags & FH_WEBNFS)
+			return (xdr_nfs_fh3(xdrs, objp));
+		else
+			return (xdr_encode_nfs_fh3(xdrs, objp));
 	case XDR_DECODE:
 		return (xdr_decode_nfs_fh3(xdrs, objp));
 	case XDR_FREE:

--- a/usr/src/uts/common/fs/nfs/nfs_export.c	Thu Mar 16 16:31:10 2006 -0800
+++ b/usr/src/uts/common/fs/nfs/nfs_export.c	Thu Mar 16 20:37:07 2006 -0800
@@ -1880,6 +1880,7 @@
 	fh->fh3_length = sizeof (fsid_t)
 			+ sizeof (ushort_t) + fh->fh3_len
 			+ sizeof (ushort_t) + fh->fh3_xlen;
+	fh->fh3_flags = 0;
 	return (0);
 }
 
@@ -1926,6 +1927,7 @@
 	 * Place the length in fh3_length representing the number
 	 * of security flavors (in bytes) in this overloaded fh.
 	 */
+	fh->fh3_flags = FH_WEBNFS;
 	fh->fh3_length = (cnt+1) * sizeof (int32_t);
 
 	c = (char *)&fh->fh3_u.nfs_fh3_i.fh3_i;

--- a/usr/src/uts/common/nfs/nfs.h	Thu Mar 16 16:31:10 2006 -0800
+++ b/usr/src/uts/common/nfs/nfs.h	Thu Mar 16 20:37:07 2006 -0800
@@ -1027,6 +1027,7 @@
 		} nfs_fh3_i;
 		char data[NFS3_FHSIZE];
 	} fh3_u;
+	uint_t fh3_flags;
 } nfs_fh3;
 #define	fh3_fsid	fh3_u.nfs_fh3_i.fh3_i._fh3_fsid
 #define	fh3_len		fh3_u.nfs_fh3_i.fh3_i._fh3_len
@@ -1037,6 +1038,11 @@
 #define	FH3TOXFIDP(fh)	((fid_t *)&((fh)->fh3_xlen))
 
 /*
+ * nfs_fh3.fh3_flags values
+ */
+#define	FH_WEBNFS	0x1	/* fh is WebNFS overloaded - see makefh3_ol() */
+
+/*
  * Two elements were added to the
  * diropargs3 structure for performance (xdr-inlining).
  * They are not included as part of the args

--- a/usr/src/uts/common/nfs/rnode.h	Thu Mar 16 16:31:10 2006 -0800
+++ b/usr/src/uts/common/nfs/rnode.h	Thu Mar 16 20:37:07 2006 -0800
@@ -2,9 +2,8 @@
  * CDDL HEADER START
  *
  * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License").  You may not use this file except in compliance
- * with the License.
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
  *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or http://www.opensolaris.org/os/licensing.
@@ -20,7 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -63,7 +62,7 @@
 	struct acache_hash *hashq;
 } acache_t;
 
-#define	NFS_FHANDLE_LEN	64
+#define	NFS_FHANDLE_LEN	72
 
 typedef struct nfs_fhandle {
 	int fh_len;