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| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2014-04-11 15:51:18 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-04-12 17:03:11 -0400 |
| commit | 5a4552752d8f7f4cef1d98775ece7adb7616fde2 (patch) | |
| tree | ebdd9dd63fce91fec7a5ba8a2f4e5d56738dac0b | |
| parent | 810d8cedcc880dca8b64e05fe1331ab5d4f8d992 (diff) | |
| download | linux-5a4552752d8f7f4cef1d98775ece7adb7616fde2.tar.gz linux-5a4552752d8f7f4cef1d98775ece7adb7616fde2.tar.bz2 linux-5a4552752d8f7f4cef1d98775ece7adb7616fde2.zip | |
gre: don't allow to add the same tunnel twice
Before the patch, it was possible to add two times the same tunnel:
ip l a gre1 type gre remote 10.16.0.121 local 10.16.0.249
ip l a gre2 type gre remote 10.16.0.121 local 10.16.0.249
It was possible, because ip_tunnel_newlink() calls ip_tunnel_find() with the
argument dev->type, which was set only later (when calling ndo_init handler
in register_netdevice()). Let's set this type in the setup handler, which is
called before newlink handler.
Introduced by commit c54419321455 ("GRE: Refactor GRE tunneling code.").
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>
| -rw-r--r-- | net/ipv4/ip_gre.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index ec4f762efda5..94213c891565 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -463,6 +463,7 @@ static const struct net_device_ops ipgre_netdev_ops = { static void ipgre_tunnel_setup(struct net_device *dev) { dev->netdev_ops = &ipgre_netdev_ops; + dev->type = ARPHRD_IPGRE; ip_tunnel_setup(dev, ipgre_net_id); } @@ -501,7 +502,6 @@ static int ipgre_tunnel_init(struct net_device *dev) memcpy(dev->dev_addr, &iph->saddr, 4); memcpy(dev->broadcast, &iph->daddr, 4); - dev->type = ARPHRD_IPGRE; dev->flags = IFF_NOARP; dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; dev->addr_len = 4; |