rem: static void update_dircookies(struct rootfs_vnode *dir, struct rootfs_vnode *v)
add: update_dircookies(struct rootfs_vnode *dir, struct rootfs_vnode *v)
context: static void update_dircookies(struct rootfs_vnode *dir, struct rootfs_vnode *v){	struct rootfs_cookie *cookie;	for (cookie = dir->stream.dir.jar_head; cookie; cookie = cookie->next) {		if(cookie->ptr == v)			cookie->ptr = v->dir_next;	}}