vxlan: fix ovs support

The required changes in the function vxlan_dev_create() were missing
in commit 8bcdc4f3a20b.
The vxlan device is not registered anymore after this patch and the error
path causes an stack dump:
 WARNING: CPU: 3 PID: 1498 at net/core/dev.c:6713 rollback_registered_many+0x9d/0x3f0

Fixes: 8bcdc4f3a20b ("vxlan: add changelink support")
CC: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index e375560cc74e5ffc09553ddab5c6b657fe1cb6f0..bdb6ae16d4a85bf9539199e189011bce104ba51a 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2976,6 +2976,44 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
        return 0;
 }
 
+static int __vxlan_dev_create(struct net *net, struct net_device *dev,
+                             struct vxlan_config *conf)
+{
+       struct vxlan_net *vn = net_generic(net, vxlan_net_id);
+       struct vxlan_dev *vxlan = netdev_priv(dev);
+       int err;
+
+       err = vxlan_dev_configure(net, dev, conf, false);
+       if (err)
+               return err;
+
+       dev->ethtool_ops = &vxlan_ethtool_ops;
+
+       /* create an fdb entry for a valid default destination */
+       if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
+               err = vxlan_fdb_create(vxlan, all_zeros_mac,
+                                      &vxlan->default_dst.remote_ip,
+                                      NUD_REACHABLE | NUD_PERMANENT,
+                                      NLM_F_EXCL | NLM_F_CREATE,
+                                      vxlan->cfg.dst_port,
+                                      vxlan->default_dst.remote_vni,
+                                      vxlan->default_dst.remote_vni,
+                                      vxlan->default_dst.remote_ifindex,
+                                      NTF_SELF);
+               if (err)
+                       return err;
+       }
+
+       err = register_netdevice(dev);
+       if (err) {
+               vxlan_fdb_delete_default(vxlan, vxlan->default_dst.remote_vni);
+               return err;
+       }
+
+       list_add(&vxlan->next, &vn->vxlan_list);
+       return 0;
+}
+
 static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
                         struct net_device *dev, struct vxlan_config *conf,
                         bool changelink)
@@ -3172,8 +3210,6 @@ static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
 static int vxlan_newlink(struct net *src_net, struct net_device *dev,
                         struct nlattr *tb[], struct nlattr *data[])
 {
-       struct vxlan_net *vn = net_generic(src_net, vxlan_net_id);
-       struct vxlan_dev *vxlan = netdev_priv(dev);
        struct vxlan_config conf;
        int err;
 
@@ -3181,36 +3217,7 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
        if (err)
                return err;
 
-       err = vxlan_dev_configure(src_net, dev, &conf, false);
-       if (err)
-               return err;
-
-       dev->ethtool_ops = &vxlan_ethtool_ops;
-
-       /* create an fdb entry for a valid default destination */
-       if (!vxlan_addr_any(&vxlan->default_dst.remote_ip)) {
-               err = vxlan_fdb_create(vxlan, all_zeros_mac,
-                                      &vxlan->default_dst.remote_ip,
-                                      NUD_REACHABLE | NUD_PERMANENT,
-                                      NLM_F_EXCL | NLM_F_CREATE,
-                                      vxlan->cfg.dst_port,
-                                      vxlan->default_dst.remote_vni,
-                                      vxlan->default_dst.remote_vni,
-                                      vxlan->default_dst.remote_ifindex,
-                                      NTF_SELF);
-               if (err)
-                       return err;
-       }
-
-       err = register_netdevice(dev);
-       if (err) {
-               vxlan_fdb_delete_default(vxlan, vxlan->default_dst.remote_vni);
-               return err;
-       }
-
-       list_add(&vxlan->next, &vn->vxlan_list);
-
-       return 0;
+       return __vxlan_dev_create(src_net, dev, &conf);
 }
 
 static int vxlan_changelink(struct net_device *dev, struct nlattr *tb[],
@@ -3440,7 +3447,7 @@ struct net_device *vxlan_dev_create(struct net *net, const char *name,
        if (IS_ERR(dev))
                return dev;
 
-       err = vxlan_dev_configure(net, dev, conf, false);
+       err = __vxlan_dev_create(net, dev, conf);
        if (err < 0) {
                free_netdev(dev);
                return ERR_PTR(err);