Commit 738314a0 authored by Jiri Benc's avatar Jiri Benc Committed by David S. Miller
Browse files

openvswitch: use hard_header_len instead of hardcoded ETH_HLEN

On tx, use hard_header_len while deciding whether to refragment or drop the
packet. That way, all combinations are calculated correctly:

* L2 packet going to L2 interface (the L2 header len is subtracted),
* L2 packet going to L3 interface (the L2 header is included in the packet
* L3 packet going to L3 interface.
Signed-off-by: default avatarJiri Benc <>
Acked-by: default avatarPravin B Shelar <>
Signed-off-by: default avatarDavid S. Miller <>
parent c540594f
......@@ -791,7 +791,8 @@ static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port,
pskb_trim(skb, ETH_HLEN);
if (likely(!mru || (skb->len <= mru + ETH_HLEN))) {
if (likely(!mru ||
(skb->len <= mru + vport->dev->hard_header_len))) {
ovs_vport_send(vport, skb);
} else if (mru <= vport->dev->mtu) {
struct net *net = read_pnet(&dp->net);
......@@ -464,9 +464,10 @@ int ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
return 0;
static unsigned int packet_length(const struct sk_buff *skb)
static unsigned int packet_length(const struct sk_buff *skb,
struct net_device *dev)
unsigned int length = skb->len - ETH_HLEN;
unsigned int length = skb->len - dev->hard_header_len;
if (!skb_vlan_tag_present(skb) &&
......@@ -484,10 +485,11 @@ void ovs_vport_send(struct vport *vport, struct sk_buff *skb)
int mtu = vport->dev->mtu;
if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
if (unlikely(packet_length(skb, vport->dev) > mtu &&
!skb_is_gso(skb))) {
net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
packet_length(skb), mtu);
packet_length(skb, vport->dev), mtu);
goto drop;
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