ceph: sync header defs with server code

Define ROLLBACK op, IFLOCK inode lock (for advisory file locking).

Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/ceph_strings.c b/fs/ceph/ceph_strings.c
index 7503aee..0f943a0 100644
--- a/fs/ceph/ceph_strings.c
+++ b/fs/ceph/ceph_strings.c
@@ -28,6 +28,7 @@
 	case CEPH_OSD_OP_TRUNCATE: return "truncate";
 	case CEPH_OSD_OP_ZERO: return "zero";
 	case CEPH_OSD_OP_WRITEFULL: return "writefull";
+	case CEPH_OSD_OP_ROLLBACK: return "rollback";
 
 	case CEPH_OSD_OP_APPEND: return "append";
 	case CEPH_OSD_OP_STARTSYNC: return "startsync";