--- a/usr/src/uts/common/nfs/nfs.h	Mon Jan 18 09:39:57 2010 -0800
+++ b/usr/src/uts/common/nfs/nfs.h	Mon Jan 18 10:34:16 2010 -0800
@@ -19,7 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -1447,6 +1447,7 @@
 #ifdef _KERNEL
 	uint_t wlist_len;
 	struct clist *wlist;
+	frtn_t zcopy;
 #endif
 };
 typedef struct READ3resok READ3resok;
@@ -2322,6 +2323,24 @@
 extern ts_label_t	*nfs_getflabel(vnode_t *, struct exportinfo *);
 extern boolean_t	do_rfs_label_check(bslabel_t *, vnode_t *, int,
 			    struct exportinfo *);
+
+/*
+ * Copy Reduction support.
+ * xuio_t wrapper with additional private data.
+ */
+
+typedef struct nfs_xuio {
+	xuio_t nu_uio;
+	vnode_t *nu_vp;
+	uint_t nu_ref;
+	frtn_t nu_frtn;
+} nfs_xuio_t;
+
+xuio_t *rfs_setup_xuio(vnode_t *);
+mblk_t *uio_to_mblk(uio_t *);
+void rfs_rndup_mblks(mblk_t *, uint_t, int);
+void rfs_free_xuio(void *);
+
 #endif	/* _KERNEL */
 
 #ifdef	__cplusplus