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Commit 2c114553 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
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macvlan: add multiqueue capability 



macvlan devices are currently not multi-queue capable.

We can do that defining rtnl_link_ops method,
get_tx_queues(), called from rtnl_create_link()

This new method gets num_tx_queues/real_num_tx_queues
from lower device.

macvlan_get_tx_queues() is a copy of vlan_get_tx_queues().

Because macvlan_start_xmit() has to update netdev_queue
stats only (and not dev->stats), I chose to change
tx_errors/tx_aborted_errors accounting to tx_dropped,
since netdev_queue structure doesnt define tx_errors /
tx_aborted_errors.

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0fa0ee05

drivers/net/macvlan.c

+27 −6
Original line number Diff line number Diff line
@@ -187,6 +187,8 @@ static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb) 
static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,

				      struct net_device *dev)

{

	int i = skb_get_queue_mapping(skb);

	struct netdev_queue *txq = netdev_get_tx_queue(dev, i);

	const struct macvlan_dev *vlan = netdev_priv(dev);

	unsigned int len = skb->len;

	int ret;
@@ -195,12 +197,11 @@ static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, 
	ret = dev_queue_xmit(skb);



	if (likely(ret == NET_XMIT_SUCCESS)) {

		dev->stats.tx_packets++;

		dev->stats.tx_bytes += len;

	} else {

		dev->stats.tx_errors++;

		dev->stats.tx_aborted_errors++;

	}

		txq->tx_packets++;

		txq->tx_bytes += len;

	} else

		txq->tx_dropped++;



	return NETDEV_TX_OK;

}
@@ -484,6 +485,25 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) 
	return 0;

}



static int macvlan_get_tx_queues(struct net *net,

				 struct nlattr *tb[],

				 unsigned int *num_tx_queues,

				 unsigned int *real_num_tx_queues)

{

	struct net_device *real_dev;



	if (!tb[IFLA_LINK])

		return -EINVAL;



	real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));

	if (!real_dev)

		return -ENODEV;



	*num_tx_queues      = real_dev->num_tx_queues;

	*real_num_tx_queues = real_dev->real_num_tx_queues;

	return 0;

}



static int macvlan_newlink(struct net_device *dev,

			   struct nlattr *tb[], struct nlattr *data[])

{
@@ -550,6 +570,7 @@ static void macvlan_dellink(struct net_device *dev) 
static struct rtnl_link_ops macvlan_link_ops __read_mostly = {

	.kind		= "macvlan",

	.priv_size	= sizeof(struct macvlan_dev),

	.get_tx_queues  = macvlan_get_tx_queues,

	.setup		= macvlan_setup,

	.validate	= macvlan_validate,

	.newlink	= macvlan_newlink,