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ipv6: Refactor common ip6gre_tunnel_init codes 

It is a prep work to fix the dst_entry refcnt bugs in ip6_tunnel.

This patch refactors some common init codes used by both
ip6gre_tunnel_init and ip6gre_tap_init.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin KaFai Lau 2015-09-15 14:30:05 -07:00 committed by David S. Miller
parent e8684c8877
commit a3c119d392
1 changed files with 24 additions and 13 deletions
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37
net/ipv6/ip6_gre.c
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@ -1245,7 +1245,7 @@ static void ip6gre_tunnel_setup(struct net_device *dev)
netif_keep_dst(dev);
}
static int ip6gre_tunnel_init(struct net_device *dev)
static int ip6gre_tunnel_init_common(struct net_device *dev)
{
struct ip6_tnl *tunnel;
@ -1255,16 +1255,30 @@ static int ip6gre_tunnel_init(struct net_device *dev)
tunnel->net = dev_net(dev);
strcpy(tunnel->parms.name, dev->name);
dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
if (!dev->tstats)
return -ENOMEM;
return 0;
}
static int ip6gre_tunnel_init(struct net_device *dev)
{
struct ip6_tnl *tunnel;
int ret;
ret = ip6gre_tunnel_init_common(dev);
if (ret)
return ret;
tunnel = netdev_priv(dev);
memcpy(dev->dev_addr, &tunnel->parms.laddr, sizeof(struct in6_addr));
memcpy(dev->broadcast, &tunnel->parms.raddr, sizeof(struct in6_addr));
if (ipv6_addr_any(&tunnel->parms.raddr))
dev->header_ops = &ip6gre_header_ops;
dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
if (!dev->tstats)
return -ENOMEM;
return 0;
}
@ -1460,19 +1474,16 @@ static void ip6gre_netlink_parms(struct nlattr *data[],
static int ip6gre_tap_init(struct net_device *dev)
{
struct ip6_tnl *tunnel;
int ret;
ret = ip6gre_tunnel_init_common(dev);
if (ret)
return ret;
tunnel = netdev_priv(dev);
tunnel->dev = dev;
tunnel->net = dev_net(dev);
strcpy(tunnel->parms.name, dev->name);
ip6gre_tnl_link_config(tunnel, 1);
dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
if (!dev->tstats)
return -ENOMEM;
return 0;
}