extern boolean_t zfs_id_overquota(zfsvfs_t *zfsvfs, uint64_t usedobj,
uint64_t id);
extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers);
-extern int zfsvfs_create(const char *name, zfsvfs_t **zfvp);
+extern int zfsvfs_create(const char *name, boolean_t readony, zfsvfs_t **zfvp);
extern int zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os);
extern void zfsvfs_free(zfsvfs_t *zfsvfs);
extern int zfs_check_global_label(const char *dsname, const char *hexsl);