Subject: Re: [PATCH net-next2.6] net: rename netdev rx_queue to ingress_queue

From: Jarek Poplawski <[email-masked]>
Date: Tue, 28 Sep 2010 20:04:47 +0200

On Tue, Sep 28, 2010 at 05:58:37PM +0200, Eric Dumazet wrote:
> There is some confusion with rx_queue name after RPS, and net drivers
> private rx_queue fields.
> 
> I suggest to rename "struct net_device"->rx_queue to ingress_queue.
> 
> Signed-off-by: Eric Dumazet <[email-masked]>
> ---
> 
> My plan is to make this structure dynamically allocated, in the rare
> case ingress is setup, to shrink net_device.

I hope Master of Ingress will forgive you this CC some day... ;-)

Jarek P.

> 
>  include/linux/netdevice.h |    2 +-
>  net/core/dev.c            |    8 ++++----
>  net/sched/sch_api.c       |   14 +++++++-------
>  net/sched/sch_generic.c   |    8 ++++----
>  4 files changed, 16 insertions(+), 16 deletions(-)
> 
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 83de0eb..1ae0d65 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -983,7 +983,7 @@ struct net_device {
>  	rx_handler_func_t	*rx_handler;
>  	void			*rx_handler_data;
>  
> -	struct netdev_queue	rx_queue; /* use two cache lines */
> +	struct netdev_queue	ingress_queue; /* use two cache lines */
>  
>  /*
>   * Cache lines mostly used on transmit path
> diff --git a/net/core/dev.c b/net/core/dev.c
> index 42b200f..0ed0669 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -2674,7 +2674,7 @@ static int ing_filter(struct sk_buff *skb)
>  	skb->tc_verd = SET_TC_RTTL(skb->tc_verd, ttl);
>  	skb->tc_verd = SET_TC_AT(skb->tc_verd, AT_INGRESS);
>  
> -	rxq = &dev->rx_queue;
> +	rxq = &dev->ingress_queue;
>  
>  	q = rxq->qdisc;
>  	if (q != &noop_qdisc) {
> @@ -2691,7 +2691,7 @@ static inline struct sk_buff *handle_ing(struct sk_buff *skb,
>  					 struct packet_type **pt_prev,
>  					 int *ret, struct net_device *orig_dev)
>  {
> -	if (skb->dev->rx_queue.qdisc == &noop_qdisc)
> +	if (skb->dev->ingress_queue.qdisc == &noop_qdisc)
>  		goto out;
>  
>  	if (*pt_prev) {
> @@ -4894,7 +4894,7 @@ static void __netdev_init_queue_locks_one(struct net_device *dev,
>  static void netdev_init_queue_locks(struct net_device *dev)
>  {
>  	netdev_for_each_tx_queue(dev, __netdev_init_queue_locks_one, NULL);
> -	__netdev_init_queue_locks_one(dev, &dev->rx_queue, NULL);
> +	__netdev_init_queue_locks_one(dev, &dev->ingress_queue, NULL);
>  }
>  
>  unsigned long netdev_fix_features(unsigned long features, const char *name)
> @@ -5406,7 +5406,7 @@ static void netdev_init_one_queue(struct net_device *dev,
>  
>  static void netdev_init_queues(struct net_device *dev)
>  {
> -	netdev_init_one_queue(dev, &dev->rx_queue, NULL);
> +	netdev_init_one_queue(dev, &dev->ingress_queue, NULL);
>  	netdev_for_each_tx_queue(dev, netdev_init_one_queue, NULL);
>  	spin_lock_init(&dev->tx_global_lock);
>  }
> diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
> index 6fb3d41..b802078 100644
> --- a/net/sched/sch_api.c
> +++ b/net/sched/sch_api.c
> @@ -240,7 +240,7 @@ struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
>  	if (q)
>  		goto out;
>  
> -	q = qdisc_match_from_root(dev->rx_queue.qdisc_sleeping, handle);
> +	q = qdisc_match_from_root(dev->ingress_queue.qdisc_sleeping, handle);
>  out:
>  	return q;
>  }
> @@ -701,7 +701,7 @@ static int qdisc_graft(struct net_device *dev, struct Qdisc *parent,
>  		}
>  
>  		for (i = 0; i < num_q; i++) {
> -			struct netdev_queue *dev_queue = &dev->rx_queue;
> +			struct netdev_queue *dev_queue = &dev->ingress_queue;
>  
>  			if (!ingress)
>  				dev_queue = netdev_get_tx_queue(dev, i);
> @@ -979,7 +979,7 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
>  					return -ENOENT;
>  				q = qdisc_leaf(p, clid);
>  			} else { /* ingress */
> -				q = dev->rx_queue.qdisc_sleeping;
> +				q = dev->ingress_queue.qdisc_sleeping;
>  			}
>  		} else {
>  			q = dev->qdisc;
> @@ -1044,7 +1044,7 @@ replay:
>  					return -ENOENT;
>  				q = qdisc_leaf(p, clid);
>  			} else { /*ingress */
> -				q = dev->rx_queue.qdisc_sleeping;
> +				q = dev->ingress_queue.qdisc_sleeping;
>  			}
>  		} else {
>  			q = dev->qdisc;
> @@ -1124,7 +1124,7 @@ create_n_graft:
>  	if (!(n->nlmsg_flags&NLM_F_CREATE))
>  		return -ENOENT;
>  	if (clid == TC_H_INGRESS)
> -		q = qdisc_create(dev, &dev->rx_queue, p,
> +		q = qdisc_create(dev, &dev->ingress_queue, p,
>  				 tcm->tcm_parent, tcm->tcm_parent,
>  				 tca, &err);
>  	else {
> @@ -1304,7 +1304,7 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
>  		if (tc_dump_qdisc_root(dev->qdisc, skb, cb, &q_idx, s_q_idx) < 0)
>  			goto done;
>  
> -		dev_queue = &dev->rx_queue;
> +		dev_queue = &dev->ingress_queue;
>  		if (tc_dump_qdisc_root(dev_queue->qdisc_sleeping, skb, cb, &q_idx, s_q_idx) < 0)
>  			goto done;
>  
> @@ -1595,7 +1595,7 @@ static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
>  	if (tc_dump_tclass_root(dev->qdisc, skb, tcm, cb, &t, s_t) < 0)
>  		goto done;
>  
> -	dev_queue = &dev->rx_queue;
> +	dev_queue = &dev->ingress_queue;
>  	if (tc_dump_tclass_root(dev_queue->qdisc_sleeping, skb, tcm, cb, &t, s_t) < 0)
>  		goto done;
>  
> diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
> index 2aeb3a4..545278a 100644
> --- a/net/sched/sch_generic.c
> +++ b/net/sched/sch_generic.c
> @@ -753,7 +753,7 @@ void dev_activate(struct net_device *dev)
>  
>  	need_watchdog = 0;
>  	netdev_for_each_tx_queue(dev, transition_one_qdisc, &need_watchdog);
> -	transition_one_qdisc(dev, &dev->rx_queue, NULL);
> +	transition_one_qdisc(dev, &dev->ingress_queue, NULL);
>  
>  	if (need_watchdog) {
>  		dev->trans_start = jiffies;
> @@ -812,7 +812,7 @@ static bool some_qdisc_is_busy(struct net_device *dev)
>  void dev_deactivate(struct net_device *dev)
>  {
>  	netdev_for_each_tx_queue(dev, dev_deactivate_queue, &noop_qdisc);
> -	dev_deactivate_queue(dev, &dev->rx_queue, &noop_qdisc);
> +	dev_deactivate_queue(dev, &dev->ingress_queue, &noop_qdisc);
>  
>  	dev_watchdog_down(dev);
>  
> @@ -838,7 +838,7 @@ void dev_init_scheduler(struct net_device *dev)
>  {
>  	dev->qdisc = &noop_qdisc;
>  	netdev_for_each_tx_queue(dev, dev_init_scheduler_queue, &noop_qdisc);
> -	dev_init_scheduler_queue(dev, &dev->rx_queue, &noop_qdisc);
> +	dev_init_scheduler_queue(dev, &dev->ingress_queue, &noop_qdisc);
>  
>  	setup_timer(&dev->watchdog_timer, dev_watchdog, (unsigned long)dev);
>  }
> @@ -861,7 +861,7 @@ static void shutdown_scheduler_queue(struct net_device *dev,
>  void dev_shutdown(struct net_device *dev)
>  {
>  	netdev_for_each_tx_queue(dev, shutdown_scheduler_queue, &noop_qdisc);
> -	shutdown_scheduler_queue(dev, &dev->rx_queue, &noop_qdisc);
> +	shutdown_scheduler_queue(dev, &dev->ingress_queue, &noop_qdisc);
>  	qdisc_destroy(dev->qdisc);
>  	dev->qdisc = &noop_qdisc;
>  
> 
>