ovs/vxlan: fix rtnl notifications on iface deletion

commit cf5da330bbdd0c06b05c525a3d1d58ccd82c87a6 upstream.

The function vxlan_dev_create() (only used by ovs) never calls
rtnl_configure_link(). The consequence is that dev->rtnl_link_state is
never set to RTNL_LINK_INITIALIZED.
During the deletion phase, the function rollback_registered_many() sends
a RTM_DELLINK only if dev->rtnl_link_state is set to RTNL_LINK_INITIALIZED.

Note that the function vxlan_dev_create() is moved after the rtnl stuff so
that vxlan_dellink() can be called in this function.

Fixes: dcc38c033b32 ("openvswitch: Re-add CONFIG_OPENVSWITCH_VXLAN")
CC: Thomas Graf <tgraf@suug.ch>
CC: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 108c899a87486d00f86ae2a7e096d5c9cd31ce4d..752f44a0e3afcc65c48569b8ec13ded7ae6cef04 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2927,30 +2927,6 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev,
        return 0;
 }
 
-struct net_device *vxlan_dev_create(struct net *net, const char *name,
-                                   u8 name_assign_type, struct vxlan_config *conf)
-{
-       struct nlattr *tb[IFLA_MAX+1];
-       struct net_device *dev;
-       int err;
-
-       memset(&tb, 0, sizeof(tb));
-
-       dev = rtnl_create_link(net, name, name_assign_type,
-                              &vxlan_link_ops, tb);
-       if (IS_ERR(dev))
-               return dev;
-
-       err = vxlan_dev_configure(net, dev, conf);
-       if (err < 0) {
-               free_netdev(dev);
-               return ERR_PTR(err);
-       }
-
-       return dev;
-}
-EXPORT_SYMBOL_GPL(vxlan_dev_create);
-
 static int vxlan_newlink(struct net *src_net, struct net_device *dev,
                         struct nlattr *tb[], struct nlattr *data[])
 {
@@ -3218,6 +3194,40 @@ static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
        .get_link_net   = vxlan_get_link_net,
 };
 
+struct net_device *vxlan_dev_create(struct net *net, const char *name,
+                                   u8 name_assign_type,
+                                   struct vxlan_config *conf)
+{
+       struct nlattr *tb[IFLA_MAX + 1];
+       struct net_device *dev;
+       int err;
+
+       memset(&tb, 0, sizeof(tb));
+
+       dev = rtnl_create_link(net, name, name_assign_type,
+                              &vxlan_link_ops, tb);
+       if (IS_ERR(dev))
+               return dev;
+
+       err = vxlan_dev_configure(net, dev, conf);
+       if (err < 0) {
+               free_netdev(dev);
+               return ERR_PTR(err);
+       }
+
+       err = rtnl_configure_link(dev, NULL);
+       if (err < 0) {
+               LIST_HEAD(list_kill);
+
+               vxlan_dellink(dev, &list_kill);
+               unregister_netdevice_many(&list_kill);
+               return ERR_PTR(err);
+       }
+
+       return dev;
+}
+EXPORT_SYMBOL_GPL(vxlan_dev_create);
+
 static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn,
                                             struct net_device *dev)
 {