Index: sys/cddl/compat/opensolaris/sys/vnode.h
===================================================================
--- sys/cddl/compat/opensolaris/sys/vnode.h
+++ sys/cddl/compat/opensolaris/sys/vnode.h
@@ -141,6 +141,8 @@
 		vap->va_mask |= AT_ATIME;
 	if (vap->va_mtime.tv_sec != VNOVAL)
 		vap->va_mask |= AT_MTIME;
+	if (vap->va_birthtime.tv_sec != VNOVAL)
+		vap->va_mask |= AT_CRTIME;
 	if (vap->va_mode != (u_short)VNOVAL)
 		vap->va_mask |= AT_MODE;
 	if (vap->va_flags != VNOVAL)
Index: sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
+++ sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
@@ -3009,7 +3009,7 @@
 	uint64_t	new_mode;
 	uint64_t	new_uid, new_gid;
 	uint64_t	xattr_obj;
-	uint64_t	mtime[2], ctime[2];
+	uint64_t	mtime[2], ctime[2], crtime[2];
 	znode_t		*attrzp;
 	int		need_policy = FALSE;
 	int		err, err2;
@@ -3085,9 +3085,10 @@
 	 * handle times greater than 2039.  This check should be removed
 	 * once large timestamps are fully supported.
 	 */
-	if (mask & (AT_ATIME | AT_MTIME)) {
+	if (mask & (AT_ATIME | AT_MTIME | AT_CRTIME)) {
 		if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) ||
-		    ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) {
+		    ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime)) ||
+		    ((mask & AT_CRTIME) && TIMESPEC_OVERFLOW(&vap->va_birthtime))) {
 			ZFS_EXIT(zfsvfs);
 			return (SET_ERROR(EOVERFLOW));
 		}
@@ -3122,7 +3123,7 @@
 		}
 	}
 
-	if (mask & (AT_ATIME|AT_MTIME) ||
+	if (mask & (AT_ATIME|AT_MTIME|AT_CRTIME) ||
 	    ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) ||
 	    XVA_ISSET_REQ(xvap, XAT_READONLY) ||
 	    XVA_ISSET_REQ(xvap, XAT_ARCHIVE) ||
@@ -3513,6 +3514,12 @@
 		    mtime, sizeof (mtime));
 	}
 
+	if (mask & AT_CRTIME) {
+		ZFS_TIME_ENCODE(&vap->va_birthtime, crtime);
+		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CRTIME(zfsvfs), NULL,
+		    crtime, sizeof (crtime));
+	}
+
 	/* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */
 	if (mask & AT_SIZE && !(mask & AT_MTIME)) {
 		SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs),
Index: sys/cddl/contrib/opensolaris/uts/common/sys/vnode.h
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/sys/vnode.h
+++ sys/cddl/contrib/opensolaris/uts/common/sys/vnode.h
@@ -162,7 +162,7 @@
 #define	AT_RDEV		0x00800
 #define	AT_BLKSIZE	0x01000
 #define	AT_NBLOCKS	0x02000
-/*			0x04000 */	/* unused */
+#define	AT_CRTIME	0x04000		/* FreeBSD specific */
 #define	AT_SEQ		0x08000
 /*
  * If AT_XVATTR is set then there are additional bits to process in