net: introduce vlan_vid_[add/del] and use them instead of direct [add/kill]_vid ndo calls

This patch adds wrapper for ndo_vlan_rx_add_vid/ndo_vlan_rx_kill_vid
functions. Check for NETIF_F_HW_VLAN_FILTER feature is done in this
wrapper.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 28 insertions, 9 deletions

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index e075625efee..dd9aa400888 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -101,7 +101,6 @@ void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
 {
         struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
         struct net_device *real_dev = vlan->real_dev;
-        const struct net_device_ops *ops = real_dev->netdev_ops;
         struct vlan_group *grp;
         u16 vlan_id = vlan->vlan_id;
 
@@ -114,8 +113,8 @@ void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
          * HW accelerating devices or SW vlan input packet processing if
          * VLAN is not 0 (leave it there for 802.1p).
          */
-        if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER))
-                ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id);
+        if (vlan_id)
+                vlan_vid_del(real_dev, vlan_id);
 
         grp->nr_vlans--;
 
@@ -169,7 +168,6 @@ int register_vlan_dev(struct net_device *dev)
 {
         struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
         struct net_device *real_dev = vlan->real_dev;
-        const struct net_device_ops *ops = real_dev->netdev_ops;
         u16 vlan_id = vlan->vlan_id;
         struct vlan_group *grp, *ngrp = NULL;
         int err;
@@ -207,8 +205,7 @@ int register_vlan_dev(struct net_device *dev)
         if (ngrp) {
                 rcu_assign_pointer(real_dev->vlgrp, ngrp);
         }
-        if (real_dev->features & NETIF_F_HW_VLAN_FILTER)
-                ops->ndo_vlan_rx_add_vid(real_dev, vlan_id);
+        vlan_vid_add(real_dev, vlan_id);
 
         return 0;
 
@@ -369,11 +366,10 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
                 __vlan_device_event(dev, event);
 
         if ((event == NETDEV_UP) &&
-            (dev->features & NETIF_F_HW_VLAN_FILTER) &&
-            dev->netdev_ops->ndo_vlan_rx_add_vid) {
+            (dev->features & NETIF_F_HW_VLAN_FILTER)) {
                 pr_info("adding VLAN 0 to HW filter on device %s\n",
                         dev->name);
-                dev->netdev_ops->ndo_vlan_rx_add_vid(dev, 0);
+                vlan_vid_add(dev, 0);
         }
 
         grp = rtnl_dereference(dev->vlgrp);
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 85241f04429..544f9cb9678 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -146,3 +146,26 @@ err_free:
         kfree_skb(skb);
         return NULL;
 }
+
+int vlan_vid_add(struct net_device *dev, unsigned short vid)
+{
+        const struct net_device_ops *ops = dev->netdev_ops;
+
+        if ((dev->features & NETIF_F_HW_VLAN_FILTER) &&
+             ops->ndo_vlan_rx_add_vid) {
+                return ops->ndo_vlan_rx_add_vid(dev, vid);
+        }
+        return 0;
+}
+EXPORT_SYMBOL(vlan_vid_add);
+
+void vlan_vid_del(struct net_device *dev, unsigned short vid)
+{
+        const struct net_device_ops *ops = dev->netdev_ops;
+
+        if ((dev->features & NETIF_F_HW_VLAN_FILTER) &&
+             ops->ndo_vlan_rx_kill_vid) {
+                ops->ndo_vlan_rx_kill_vid(dev, vid);
+        }
+}
+EXPORT_SYMBOL(vlan_vid_del);