net: unpollute priv_flags space

the ipvlan device driver defines and uses 2 bits inside the priv_flags
net_device field. Such bits and the related helper are used only
inside the ipvlan device driver, and the core networking does not
need to be aware of them.

This change moves netif_is_ipvlan* helper in the ipvlan driver and
re-implement them looking for ipvlan specific symbols instead of
using priv_flags.

Overall this frees two bits inside priv_flags - and move the following
ones to avoid gaps - without any intended functional change.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 12 insertions, 4 deletions

diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h
index a115f12bf130..c818b9bdab6e 100644
--- a/drivers/net/ipvlan/ipvlan.h
+++ b/drivers/net/ipvlan/ipvlan.h
@@ -177,4 +177,10 @@ int ipvlan_link_new(struct net *src_net, struct net_device *dev,
 void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
 void ipvlan_link_setup(struct net_device *dev);
 int ipvlan_link_register(struct rtnl_link_ops *ops);
+
+static inline bool netif_is_ipvlan_port(const struct net_device *dev)
+{
+        return dev->rx_handler == ipvlan_handle_frame;
+}
+
 #endif /* __IPVLAN_H */
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index 4cbe9e27287d..23fd5ab180e8 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -129,7 +129,6 @@ static int ipvlan_port_create(struct net_device *dev)
         if (err)
                 goto err;
 
-        dev->priv_flags |= IFF_IPVLAN_MASTER;
         return 0;
 
 err:
@@ -142,7 +141,6 @@ static void ipvlan_port_destroy(struct net_device *dev)
         struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
         struct sk_buff *skb;
 
-        dev->priv_flags &= ~IFF_IPVLAN_MASTER;
         if (port->mode == IPVLAN_MODE_L3S) {
                 dev->priv_flags &= ~IFF_L3MDEV_MASTER;
                 ipvlan_unregister_nf_hook(dev_net(dev));
@@ -423,6 +421,12 @@ static const struct header_ops ipvlan_header_ops = {
         .cache_update   = eth_header_cache_update,
 };
 
+static bool netif_is_ipvlan(const struct net_device *dev)
+{
+        /* both ipvlan and ipvtap devices use the same netdev_ops */
+        return dev->netdev_ops == &ipvlan_netdev_ops;
+}
+
 static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev,
                                              struct ethtool_link_ksettings *cmd)
 {
@@ -600,8 +604,6 @@ int ipvlan_link_new(struct net *src_net, struct net_device *dev,
          */
         memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
 
-        dev->priv_flags |= IFF_IPVLAN_SLAVE;
-
         err = register_netdevice(dev);
         if (err < 0)
                 return err;