sit: Use ipip6_tunnel_init as the ndo_init function.

[ Upstream commit ebe084aafb7e93adf210e80043c9f69adf56820d ]

ipip6_tunnel_init() sets the dev->iflink via a call to
ipip6_tunnel_bind_dev(). After that, register_netdevice()
sets dev->iflink = -1. So we loose the iflink configuration
for ipv6 tunnels. Fix this by using ipip6_tunnel_init() as the
ndo_init function. Then ipip6_tunnel_init() is called after
dev->iflink is set to -1 from register_netdevice().

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index b12b11b..317b6db 100644 (file)
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -195,10 +195,8 @@ static int ipip6_tunnel_create(struct net_device *dev)
        struct sit_net *sitn = net_generic(net, sit_net_id);
        int err;
 
-       err = ipip6_tunnel_init(dev);
-       if (err < 0)
-               goto out;
-       ipip6_tunnel_clone_6rd(dev, sitn);
+       memcpy(dev->dev_addr, &t->parms.iph.saddr, 4);
+       memcpy(dev->broadcast, &t->parms.iph.daddr, 4);
 
        if ((__force u16)t->parms.i_flags & SIT_ISATAP)
                dev->priv_flags |= IFF_ISATAP;
@@ -207,7 +205,8 @@ static int ipip6_tunnel_create(struct net_device *dev)
        if (err < 0)
                goto out;
 
-       strcpy(t->parms.name, dev->name);
+       ipip6_tunnel_clone_6rd(dev, sitn);
+
        dev->rtnl_link_ops = &sit_link_ops;
 
        dev_hold(dev);
@@ -1321,6 +1320,7 @@ static int ipip6_tunnel_change_mtu(struct net_device *dev, int new_mtu)
 }
 
 static const struct net_device_ops ipip6_netdev_ops = {
+       .ndo_init       = ipip6_tunnel_init,
        .ndo_uninit     = ipip6_tunnel_uninit,
        .ndo_start_xmit = sit_tunnel_xmit,
        .ndo_do_ioctl   = ipip6_tunnel_ioctl,
@@ -1367,9 +1367,7 @@ static int ipip6_tunnel_init(struct net_device *dev)
 
        tunnel->dev = dev;
        tunnel->net = dev_net(dev);
-
-       memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4);
-       memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);
+       strcpy(tunnel->parms.name, dev->name);
 
        ipip6_tunnel_bind_dev(dev);
        dev->tstats = alloc_percpu(struct pcpu_sw_netstats);
@@ -1401,7 +1399,6 @@ static int __net_init ipip6_fb_tunnel_init(struct net_device *dev)
 
        tunnel->dev = dev;
        tunnel->net = dev_net(dev);
-       strcpy(tunnel->parms.name, dev->name);
 
        iph->version            = 4;
        iph->protocol           = IPPROTO_IPV6;