vlan: multiqueue vlan device

vlan devices are currently not multi-queue capable.

We can do that with a new rtnl_link_ops method,
get_tx_queues(), called from rtnl_create_link()

This new method gets num_tx_queues/real_num_tx_queues
from real device.

register_vlan_device() is also handled.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 1 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index b44775f9f2bf..bbcba2a41018 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -974,12 +974,20 @@ struct net_device *rtnl_create_link(struct net *net, char *ifname,
 {
         int err;
         struct net_device *dev;
+        unsigned int num_queues = 1;
+        unsigned int real_num_queues = 1;
 
+        if (ops->get_tx_queues) {
+                err = ops->get_tx_queues(net, tb, &num_queues, &real_num_queues);
+                if (err)
+                        goto err;
+        }
         err = -ENOMEM;
-        dev = alloc_netdev(ops->priv_size, ifname, ops->setup);
+        dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
         if (!dev)
                 goto err;
 
+        dev->real_num_tx_queues = real_num_queues;
         if (strchr(dev->name, '%')) {
                 err = dev_alloc_name(dev, dev->name);
                 if (err < 0)