[PATCH 3.13.y-ckt 15/96] sit: Use ipip6_tunnel_init as the ndo_init function.

From: Kamal Mostafa
Date: Mon Dec 15 2014 - 14:53:23 EST


3.13.11-ckt13 -stable review patch. If anyone has any objections, please let me know.

------------------

From: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>

[ 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@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
net/ipv6/sit.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 9568c1f..25ed067 100644
--- 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);
@@ -1317,6 +1316,7 @@ 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,
@@ -1360,9 +1360,7 @@ 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_tstats);
@@ -1388,7 +1386,6 @@ 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;
--
1.9.1

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