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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: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2009-09-03 00:11:45 +00:00 committed by David S. Miller
parent 0fa0ee053a
commit 2c11455321
1 changed files with 27 additions and 6 deletions
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33
drivers/net/macvlan.c
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@ -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,