diff options
| author | Cong Wang <cwang@twopensource.com> | 2014-06-12 11:53:10 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-13 15:27:59 -0700 |
| commit | 2853af6a2ea1a8ed09b09dd4fb578e7f435e8d34 (patch) | |
| tree | 5fe67955fc104ebd852e3a3c7fcea1cea5713efa | |
| parent | 56f16c74ca25649691fcfe4eedfb8ecadec830cb (diff) | |
| download | blackbird-obmc-linux-2853af6a2ea1a8ed09b09dd4fb578e7f435e8d34.tar.gz blackbird-obmc-linux-2853af6a2ea1a8ed09b09dd4fb578e7f435e8d34.zip | |
vxlan: use dev->needed_headroom instead of dev->hard_header_len
When we mirror packets from a vxlan tunnel to other device,
the mirror device should see the same packets (that is, without
outer header). Because vxlan tunnel sets dev->hard_header_len,
tcf_mirred() resets mac header back to outer mac, the mirror device
actually sees packets with outer headers
Vxlan tunnel should set dev->needed_headroom instead of
dev->hard_header_len, like what other ip tunnels do. This fixes
the above problem.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: stephen hemminger <stephen@networkplumber.org>
Cc: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/vxlan.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 1610d51dbb5c..e0995ffd046d 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2247,9 +2247,9 @@ static void vxlan_setup(struct net_device *dev) eth_hw_addr_random(dev); ether_setup(dev); if (vxlan->default_dst.remote_ip.sa.sa_family == AF_INET6) - dev->hard_header_len = ETH_HLEN + VXLAN6_HEADROOM; + dev->needed_headroom = ETH_HLEN + VXLAN6_HEADROOM; else - dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM; + dev->needed_headroom = ETH_HLEN + VXLAN_HEADROOM; dev->netdev_ops = &vxlan_netdev_ops; dev->destructor = free_netdev; @@ -2646,8 +2646,7 @@ static int vxlan_newlink(struct net *net, struct net_device *dev, if (!tb[IFLA_MTU]) dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); - /* update header length based on lower device */ - dev->hard_header_len = lowerdev->hard_header_len + + dev->needed_headroom = lowerdev->hard_header_len + (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); } else if (use_ipv6) vxlan->flags |= VXLAN_F_IPV6; |
