diff --git a/sys/fs/cd9660/cd9660_vnops.c b/sys/fs/cd9660/cd9660_vnops.c
index 3b538a8d0cb5..f7385656cc20 100644
--- a/sys/fs/cd9660/cd9660_vnops.c
+++ b/sys/fs/cd9660/cd9660_vnops.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)cd9660_vnops.c	8.3 (Berkeley) 1/23/94
- * $Id: cd9660_vnops.c,v 1.13 1995/03/28 07:46:38 phk Exp $
+ * $Id: cd9660_vnops.c,v 1.14 1995/05/30 08:05:05 rgrimes Exp $
  */
 
 #include <sys/param.h>
@@ -202,6 +202,7 @@ cd9660_getattr(ap)
 	vap->va_blocksize = ip->i_mnt->logical_block_size;
 	vap->va_bytes	= (u_quad_t) ip->i_size;
 	vap->va_type	= vp->v_type;
+	vap->va_filerev	= 0;
 	return (0);
 }
 
diff --git a/sys/fs/msdosfs/denode.h b/sys/fs/msdosfs/denode.h
index a7f2928ec8c5..804d4f65bdd7 100644
--- a/sys/fs/msdosfs/denode.h
+++ b/sys/fs/msdosfs/denode.h
@@ -1,4 +1,4 @@
-/*	$Id: denode.h,v 1.4 1995/03/16 18:14:17 bde Exp $ */
+/*	$Id: denode.h,v 1.5 1995/05/30 08:07:32 rgrimes Exp $ */
 /*	$NetBSD: denode.h,v 1.8 1994/08/21 18:43:49 ws Exp $	*/
 
 /*-
@@ -159,6 +159,7 @@ struct denode {
 	u_short de_StartCluster; /* starting cluster of file */
 	u_long de_FileSize;	/* size of file in bytes */
 	struct fatcache de_fc[FC_SIZE];	/* fat cache */
+	u_quad_t de_modrev;	/* Revision level for lease. */
 };
 
 /*
diff --git a/sys/fs/msdosfs/msdosfs_denode.c b/sys/fs/msdosfs/msdosfs_denode.c
index 60a68111833d..2635ac17a099 100644
--- a/sys/fs/msdosfs/msdosfs_denode.c
+++ b/sys/fs/msdosfs/msdosfs_denode.c
@@ -1,4 +1,4 @@
-/*	$Id: msdosfs_denode.c,v 1.11 1995/04/11 17:13:17 bde Exp $ */
+/*	$Id: msdosfs_denode.c,v 1.12 1995/05/30 08:07:37 rgrimes Exp $ */
 /*	$NetBSD: msdosfs_denode.c,v 1.9 1994/08/21 18:44:00 ws Exp $	*/
 
 /*-
@@ -70,6 +70,23 @@ struct denode **dehashtbl;
 u_long dehash;			/* size of hash table - 1 */
 #define	DEHASH(dev, deno)	(((dev) + (deno)) & dehash)
 
+union _qcvt {
+	quad_t qcvt;
+	long val[2];
+};
+#define SETHIGH(q, h) { \
+	union _qcvt tmp; \
+	tmp.qcvt = (q); \
+	tmp.val[_QUAD_HIGHWORD] = (h); \
+	(q) = tmp.qcvt; \
+}
+#define SETLOW(q, l) { \
+	union _qcvt tmp; \
+	tmp.qcvt = (q); \
+	tmp.val[_QUAD_LOWWORD] = (l); \
+	(q) = tmp.qcvt; \
+}
+
 int msdosfs_init()
 {
 	dehashtbl = hashinit(desiredvnodes/2, M_MSDOSFSMNT, &dehash);
@@ -297,6 +314,8 @@ deget(pmp, dirclust, diroffset, direntptr, depp)
 		}
 	} else
 		nvp->v_type = VREG;
+	SETHIGH(ldep->de_modrev, mono_time.tv_sec);
+	SETLOW(ldep->de_modrev, mono_time.tv_usec * 4294);
 	VREF(ldep->de_devvp);
 	*depp = ldep;
 	return 0;
diff --git a/sys/fs/msdosfs/msdosfs_vnops.c b/sys/fs/msdosfs/msdosfs_vnops.c
index 7abfb479eddf..945ca49d73ac 100644
--- a/sys/fs/msdosfs/msdosfs_vnops.c
+++ b/sys/fs/msdosfs/msdosfs_vnops.c
@@ -1,4 +1,4 @@
-/*	$Id: msdosfs_vnops.c,v 1.18 1995/06/28 07:06:48 davidg Exp $ */
+/*	$Id: msdosfs_vnops.c,v 1.19 1995/08/01 18:50:55 davidg Exp $ */
 /*	$NetBSD: msdosfs_vnops.c,v 1.20 1994/08/21 18:44:13 ws Exp $	*/
 
 /*-
@@ -336,6 +336,7 @@ msdosfs_getattr(ap)
 	vap->va_bytes = (dep->de_FileSize + dep->de_pmp->pm_crbomask) &
 	    			~(dep->de_pmp->pm_crbomask);
 	vap->va_type = ap->a_vp->v_type;
+	vap->va_filerev = dep->de_modrev;
 	return 0;
 }
 
diff --git a/sys/isofs/cd9660/cd9660_vnops.c b/sys/isofs/cd9660/cd9660_vnops.c
index 3b538a8d0cb5..f7385656cc20 100644
--- a/sys/isofs/cd9660/cd9660_vnops.c
+++ b/sys/isofs/cd9660/cd9660_vnops.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)cd9660_vnops.c	8.3 (Berkeley) 1/23/94
- * $Id: cd9660_vnops.c,v 1.13 1995/03/28 07:46:38 phk Exp $
+ * $Id: cd9660_vnops.c,v 1.14 1995/05/30 08:05:05 rgrimes Exp $
  */
 
 #include <sys/param.h>
@@ -202,6 +202,7 @@ cd9660_getattr(ap)
 	vap->va_blocksize = ip->i_mnt->logical_block_size;
 	vap->va_bytes	= (u_quad_t) ip->i_size;
 	vap->va_type	= vp->v_type;
+	vap->va_filerev	= 0;
 	return (0);
 }
 
diff --git a/sys/msdosfs/denode.h b/sys/msdosfs/denode.h
index a7f2928ec8c5..804d4f65bdd7 100644
--- a/sys/msdosfs/denode.h
+++ b/sys/msdosfs/denode.h
@@ -1,4 +1,4 @@
-/*	$Id: denode.h,v 1.4 1995/03/16 18:14:17 bde Exp $ */
+/*	$Id: denode.h,v 1.5 1995/05/30 08:07:32 rgrimes Exp $ */
 /*	$NetBSD: denode.h,v 1.8 1994/08/21 18:43:49 ws Exp $	*/
 
 /*-
@@ -159,6 +159,7 @@ struct denode {
 	u_short de_StartCluster; /* starting cluster of file */
 	u_long de_FileSize;	/* size of file in bytes */
 	struct fatcache de_fc[FC_SIZE];	/* fat cache */
+	u_quad_t de_modrev;	/* Revision level for lease. */
 };
 
 /*
diff --git a/sys/msdosfs/msdosfs_denode.c b/sys/msdosfs/msdosfs_denode.c
index 60a68111833d..2635ac17a099 100644
--- a/sys/msdosfs/msdosfs_denode.c
+++ b/sys/msdosfs/msdosfs_denode.c
@@ -1,4 +1,4 @@
-/*	$Id: msdosfs_denode.c,v 1.11 1995/04/11 17:13:17 bde Exp $ */
+/*	$Id: msdosfs_denode.c,v 1.12 1995/05/30 08:07:37 rgrimes Exp $ */
 /*	$NetBSD: msdosfs_denode.c,v 1.9 1994/08/21 18:44:00 ws Exp $	*/
 
 /*-
@@ -70,6 +70,23 @@ struct denode **dehashtbl;
 u_long dehash;			/* size of hash table - 1 */
 #define	DEHASH(dev, deno)	(((dev) + (deno)) & dehash)
 
+union _qcvt {
+	quad_t qcvt;
+	long val[2];
+};
+#define SETHIGH(q, h) { \
+	union _qcvt tmp; \
+	tmp.qcvt = (q); \
+	tmp.val[_QUAD_HIGHWORD] = (h); \
+	(q) = tmp.qcvt; \
+}
+#define SETLOW(q, l) { \
+	union _qcvt tmp; \
+	tmp.qcvt = (q); \
+	tmp.val[_QUAD_LOWWORD] = (l); \
+	(q) = tmp.qcvt; \
+}
+
 int msdosfs_init()
 {
 	dehashtbl = hashinit(desiredvnodes/2, M_MSDOSFSMNT, &dehash);
@@ -297,6 +314,8 @@ deget(pmp, dirclust, diroffset, direntptr, depp)
 		}
 	} else
 		nvp->v_type = VREG;
+	SETHIGH(ldep->de_modrev, mono_time.tv_sec);
+	SETLOW(ldep->de_modrev, mono_time.tv_usec * 4294);
 	VREF(ldep->de_devvp);
 	*depp = ldep;
 	return 0;
diff --git a/sys/msdosfs/msdosfs_vnops.c b/sys/msdosfs/msdosfs_vnops.c
index 7abfb479eddf..945ca49d73ac 100644
--- a/sys/msdosfs/msdosfs_vnops.c
+++ b/sys/msdosfs/msdosfs_vnops.c
@@ -1,4 +1,4 @@
-/*	$Id: msdosfs_vnops.c,v 1.18 1995/06/28 07:06:48 davidg Exp $ */
+/*	$Id: msdosfs_vnops.c,v 1.19 1995/08/01 18:50:55 davidg Exp $ */
 /*	$NetBSD: msdosfs_vnops.c,v 1.20 1994/08/21 18:44:13 ws Exp $	*/
 
 /*-
@@ -336,6 +336,7 @@ msdosfs_getattr(ap)
 	vap->va_bytes = (dep->de_FileSize + dep->de_pmp->pm_crbomask) &
 	    			~(dep->de_pmp->pm_crbomask);
 	vap->va_type = ap->a_vp->v_type;
+	vap->va_filerev = dep->de_modrev;
 	return 0;
 }