netdev - Re: [PATCH] net_sched: Add qdisc __NET_XMIT

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Date:	Fri, 01 Aug 2008 08:15:50 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Jarek Poplawski <jarkao2@...il.com>
CC:	David Miller <davem@...emloft.net>, jussi.kivilinna@...et.fi,
	netdev@...r.kernel.org
Subject: Re: [PATCH] net_sched: Add qdisc __NET_XMIT_STOLEN flag

Jarek Poplawski wrote:
> Hi,
> 
> Here is a complete, I hope,  version of the patch to not linger this
> all to much, but of course any redoing is possible.

This looks good to me. Just one suggestion:

> +#ifdef CONFIG_NET_CLS_ACT
> +/* additional qdisc xmit flags */
> +enum net_xmit_qdisc_t {
> +	__NET_XMIT_STOLEN = NET_XMIT_MASK + 1,
> +};
> +
> +#define net_xmit_drop_count(e)	((e) & __NET_XMIT_STOLEN ? 0 : 1)
> +
> +#else
> +#define net_xmit_drop_count(e)	(1)
> +#endif
> +
>  static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
>  {
>  #ifdef CONFIG_NET_SCHED
> @@ -343,7 +355,7 @@ static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
>  static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch)
>  {
>  	qdisc_skb_cb(skb)->pkt_len = skb->len;
> -	return qdisc_enqueue(skb, sch);
> +	return qdisc_enqueue(skb, sch) & NET_XMIT_MASK;

It would be nice to handle NET_XMIT_BYPASS similar, currently its
mapped to NET_XMIT_SUCCESS by dev_queue_xmit(). Simply adding it
to net_xmit_qdisc_t as

__NET_XMIT_BYPASS = NET_XMIT_MASK + 0x2

and removing the mapping from dev_queue_xmit() should work I think.
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