-#define OBD_IOC_QUOTACTL _IOWR('f', 162, struct if_quotactl *)
-
-#define OBD_IOC_MOUNTOPT _IOWR('f', 170, OBD_IOC_DATA_TYPE)
-
+/* OBD_IOC_QUOTACTL: See also LL_IOC_QUOTACTL */
+#define OBD_IOC_QUOTACTL _IOWR('f', 162, struct if_quotactl)
+/* see also <lustre/lustre_user.h> for ioctls 163-176 */
+#define OBD_IOC_CHANGELOG_REG _IOW ('f', 177, struct obd_ioctl_data)
+#define OBD_IOC_CHANGELOG_DEREG _IOW ('f', 178, struct obd_ioctl_data)
+#define OBD_IOC_CHANGELOG_CLEAR _IOW ('f', 179, struct obd_ioctl_data)