| From 1bd028059821679ab698aa5f64934ea90f514466 Mon Sep 17 00:00:00 2001 |
| From: Sridhar Samudrala <sri@us.ibm.com> |
| Date: Tue, 17 Sep 2013 12:12:40 -0700 |
| Subject: vxlan: Avoid creating fdb entry with NULL destination |
| |
| From: Sridhar Samudrala <sri@us.ibm.com> |
| |
| [ Upstream commit 2936b6ab455433a5ad14c7a1d2473afe1fa3faa7 ] |
| |
| Commit afbd8bae9c798c5cdbe4439d3a50536b5438247c |
| vxlan: add implicit fdb entry for default destination |
| creates an implicit fdb entry for default destination. This results |
| in an invalid fdb entry if default destination is not specified. |
| For ex: |
| ip link add vxlan1 type vxlan id 100 |
| creates the following fdb entry |
| 00:00:00:00:00:00 dev vxlan1 dst 0.0.0.0 self permanent |
| |
| This patch fixes this issue by creating an fdb entry only if a |
| valid default destination is specified. |
| |
| Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> |
| Signed-off-by: David S. Miller <davem@davemloft.net> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/net/vxlan.c | 20 +++++++++++--------- |
| 1 file changed, 11 insertions(+), 9 deletions(-) |
| |
| --- a/drivers/net/vxlan.c |
| +++ b/drivers/net/vxlan.c |
| @@ -1767,15 +1767,17 @@ static int vxlan_newlink(struct net *net |
| |
| SET_ETHTOOL_OPS(dev, &vxlan_ethtool_ops); |
| |
| - /* create an fdb entry for default destination */ |
| - err = vxlan_fdb_create(vxlan, all_zeros_mac, |
| - vxlan->default_dst.remote_ip, |
| - NUD_REACHABLE|NUD_PERMANENT, |
| - NLM_F_EXCL|NLM_F_CREATE, |
| - vxlan->dst_port, vxlan->default_dst.remote_vni, |
| - vxlan->default_dst.remote_ifindex, NTF_SELF); |
| - if (err) |
| - return err; |
| + /* create an fdb entry for a valid default destination */ |
| + if (vxlan->default_dst.remote_ip != htonl(INADDR_ANY)) { |
| + err = vxlan_fdb_create(vxlan, all_zeros_mac, |
| + vxlan->default_dst.remote_ip, |
| + NUD_REACHABLE|NUD_PERMANENT, |
| + NLM_F_EXCL|NLM_F_CREATE, |
| + vxlan->dst_port, vxlan->default_dst.remote_vni, |
| + vxlan->default_dst.remote_ifindex, NTF_SELF); |
| + if (err) |
| + return err; |
| + } |
| |
| err = register_netdevice(dev); |
| if (err) { |