- Add a lock flag to the component name so that namei() may request a

shared lock.  Filesystems are not required to honor this request.

Sponsored by:	Isilon Systems, Inc.

sys/sys/namei.h

@@ -44,6 +44,7 @@ struct componentname {
 	u_long	cn_flags;	/* flags to namei */
 	struct	thread *cn_thread;/* thread requesting lookup */
 	struct	ucred *cn_cred;	/* credentials */
+	int	cn_lkflags;	/* Lock flags LK_EXCLUSIVE or LK_SHARED */
 	/*
 	 * Shared between lookup and commit routines.
 	 */