dequeue_func
codel_skb_dequeue_t dequeue_func)
struct sk_buff *skb = dequeue_func(vars, ctx);
skb = dequeue_func(vars, ctx);
skb = dequeue_func(vars, ctx);
skb = dequeue_func(fq, tin, flow);
fq_tin_dequeue_t dequeue_func)
drop_func, dequeue_func);
codel_get_enqueue_time, drop_func, dequeue_func);