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Commit e2d9d835 authored by Jiri Benc's avatar Jiri Benc Committed by David S. Miller
Browse files

openvswitch: pass mac_proto to ovs_vport_send 



We'll need it to alter packets sent to ARPHRD_NONE interfaces.

Change do_output() to use the actual L2 header size of the packet when
deciding on the minimum cutlen. The assumption here is that what matters is
not the output interface hard_header_len but rather the L2 header of the
particular packet. For example, ARPHRD_NONE tunnels that encapsulate
Ethernet should get at least the Ethernet header.

Signed-off-by: default avatarJiri Benc <jbenc@redhat.com>
Acked-by: default avatarPravin B Shelar <pshelar@ovn.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 329f45bc

net/openvswitch/actions.c

+17 −12
Original line number Diff line number Diff line
@@ -66,6 +66,7 @@ struct ovs_frag_data { 
	u16 vlan_tci;

	__be16 vlan_proto;

	unsigned int l2_len;

	u8 mac_proto;

	u8 l2_data[MAX_L2_LEN];

};
@@ -673,7 +674,7 @@ static int ovs_vport_output(struct net *net, struct sock *sk, struct sk_buff *sk 
		skb_reset_mac_len(skb);

	}



	ovs_vport_send(vport, skb);

	ovs_vport_send(vport, skb, data->mac_proto);

	return 0;

}
@@ -692,7 +693,7 @@ static struct dst_ops ovs_dst_ops = { 
 * ovs_vport_output(), which is called once per fragmented packet.

 */

static void prepare_frag(struct vport *vport, struct sk_buff *skb,

			 u16 orig_network_offset)

			 u16 orig_network_offset, u8 mac_proto)

{

	unsigned int hlen = skb_network_offset(skb);

	struct ovs_frag_data *data;
@@ -705,6 +706,7 @@ static void prepare_frag(struct vport *vport, struct sk_buff *skb, 
	data->network_offset = orig_network_offset;

	data->vlan_tci = skb->vlan_tci;

	data->vlan_proto = skb->vlan_proto;

	data->mac_proto = mac_proto;

	data->l2_len = hlen;

	memcpy(&data->l2_data, skb->data, hlen);
@@ -713,7 +715,8 @@ static void prepare_frag(struct vport *vport, struct sk_buff *skb, 
}



static void ovs_fragment(struct net *net, struct vport *vport,

			 struct sk_buff *skb, u16 mru, __be16 ethertype)

			 struct sk_buff *skb, u16 mru,

			 struct sw_flow_key *key)

{

	u16 orig_network_offset = 0;
@@ -727,11 +730,12 @@ static void ovs_fragment(struct net *net, struct vport *vport, 
		goto err;

	}



	if (ethertype == htons(ETH_P_IP)) {

	if (key->eth.type == htons(ETH_P_IP)) {

		struct dst_entry ovs_dst;

		unsigned long orig_dst;



		prepare_frag(vport, skb, orig_network_offset);

		prepare_frag(vport, skb, orig_network_offset,

			     ovs_key_mac_proto(key));

		dst_init(&ovs_dst, &ovs_dst_ops, NULL, 1,

			 DST_OBSOLETE_NONE, DST_NOCOUNT);

		ovs_dst.dev = vport->dev;
@@ -742,7 +746,7 @@ static void ovs_fragment(struct net *net, struct vport *vport, 


		ip_do_fragment(net, skb->sk, skb, ovs_vport_output);

		refdst_drop(orig_dst);

	} else if (ethertype == htons(ETH_P_IPV6)) {

	} else if (key->eth.type == htons(ETH_P_IPV6)) {

		const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops();

		unsigned long orig_dst;

		struct rt6_info ovs_rt;
@@ -751,7 +755,8 @@ static void ovs_fragment(struct net *net, struct vport *vport, 
			goto err;

		}



		prepare_frag(vport, skb, orig_network_offset);

		prepare_frag(vport, skb, orig_network_offset,

			     ovs_key_mac_proto(key));

		memset(&ovs_rt, 0, sizeof(ovs_rt));

		dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1,

			 DST_OBSOLETE_NONE, DST_NOCOUNT);
@@ -765,7 +770,7 @@ static void ovs_fragment(struct net *net, struct vport *vport, 
		refdst_drop(orig_dst);

	} else {

		WARN_ONCE(1, "Failed fragment ->%s: eth=%04x, MRU=%d, MTU=%d.",

			  ovs_vport_name(vport), ntohs(ethertype), mru,

			  ovs_vport_name(vport), ntohs(key->eth.type), mru,

			  vport->dev->mtu);

		goto err;

	}
@@ -785,19 +790,19 @@ static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port, 
		u32 cutlen = OVS_CB(skb)->cutlen;



		if (unlikely(cutlen > 0)) {

			if (skb->len - cutlen > ETH_HLEN)

			if (skb->len - cutlen > ovs_mac_header_len(key))

				pskb_trim(skb, skb->len - cutlen);

			else

				pskb_trim(skb, ETH_HLEN);

				pskb_trim(skb, ovs_mac_header_len(key));

		}



		if (likely(!mru ||

		           (skb->len <= mru + vport->dev->hard_header_len))) {

			ovs_vport_send(vport, skb);

			ovs_vport_send(vport, skb, ovs_key_mac_proto(key));

		} else if (mru <= vport->dev->mtu) {

			struct net *net = read_pnet(&dp->net);



			ovs_fragment(net, vport, skb, mru, key->eth.type);

			ovs_fragment(net, vport, skb, mru, key);

		} else {

			kfree_skb(skb);

		}

net/openvswitch/vport.c

+1 −1
Original line number Diff line number Diff line
@@ -481,7 +481,7 @@ static unsigned int packet_length(const struct sk_buff *skb, 
	return length;

}



void ovs_vport_send(struct vport *vport, struct sk_buff *skb)

void ovs_vport_send(struct vport *vport, struct sk_buff *skb, u8 mac_proto)

{

	int mtu = vport->dev->mtu;

net/openvswitch/vport.h

+1 −1
Original line number Diff line number Diff line
@@ -197,6 +197,6 @@ int __ovs_vport_ops_register(struct vport_ops *ops); 
	})



void ovs_vport_ops_unregister(struct vport_ops *ops);

void ovs_vport_send(struct vport *vport, struct sk_buff *skb);

void ovs_vport_send(struct vport *vport, struct sk_buff *skb, u8 mac_proto);



#endif /* vport.h */