From 3285ee3bb2e158299ff19b947e41da735980d954 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Sat, 30 Oct 2010 16:21:28 -0700
Subject: [PATCH] ip_gre: fix fallback tunnel setup
Before making the fallback tunnel visible to lookups, we should make
sure it is completely setup, once ipgre_tunnel_init() had been called
and tstats per_cpu pointer allocated.
move rcu_assign_pointer(ign->tunnels_wc[0], tunnel); from
ipgre_fb_tunnel_init() to ipgre_init_net()
Based on a patch from Pavel Emelyanov
Reported-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/ipv4/ip_gre.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 01087e035b7d..70ff77f02eee 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -1325,7 +1325,6 @@ static void ipgre_fb_tunnel_init(struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
struct iphdr *iph = &tunnel->parms.iph;
- struct ipgre_net *ign = net_generic(dev_net(dev), ipgre_net_id);
tunnel->dev = dev;
strcpy(tunnel->parms.name, dev->name);
@@ -1336,7 +1335,6 @@ static void ipgre_fb_tunnel_init(struct net_device *dev)
tunnel->hlen = sizeof(struct iphdr) + 4;
dev_hold(dev);
- rcu_assign_pointer(ign->tunnels_wc[0], tunnel);
}
@@ -1383,10 +1381,12 @@ static int __net_init ipgre_init_net(struct net *net)
if ((err = register_netdev(ign->fb_tunnel_dev)))
goto err_reg_dev;
+ rcu_assign_pointer(ign->tunnels_wc[0],
+ netdev_priv(ign->fb_tunnel_dev));
return 0;
err_reg_dev:
- free_netdev(ign->fb_tunnel_dev);
+ ipgre_dev_free(ign->fb_tunnel_dev);
err_alloc_dev:
return err;
}
--
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