vxlan: Factor out vxlan send api.
Following patch allows more code sharing between vxlan and ovs-vxlan. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Родитель
012a5729ff
Коммит
49560532d7
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@ -1082,11 +1082,8 @@ static void vxlan_sock_put(struct sk_buff *skb)
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}
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/* On transmit, associate with the tunnel socket */
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static void vxlan_set_owner(struct net_device *dev, struct sk_buff *skb)
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static void vxlan_set_owner(struct sock *sk, struct sk_buff *skb)
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{
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struct vxlan_dev *vxlan = netdev_priv(dev);
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struct sock *sk = vxlan->vn_sock->sock->sk;
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skb_orphan(skb);
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sock_hold(sk);
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skb->sk = sk;
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@ -1098,9 +1095,9 @@ static void vxlan_set_owner(struct net_device *dev, struct sk_buff *skb)
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* better and maybe available from hardware
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* secondary choice is to use jhash on the Ethernet header
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*/
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static __be16 vxlan_src_port(const struct vxlan_dev *vxlan, struct sk_buff *skb)
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__be16 vxlan_src_port(__u16 port_min, __u16 port_max, struct sk_buff *skb)
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{
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unsigned int range = (vxlan->port_max - vxlan->port_min) + 1;
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unsigned int range = (port_max - port_min) + 1;
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u32 hash;
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hash = skb_get_rxhash(skb);
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@ -1108,8 +1105,9 @@ static __be16 vxlan_src_port(const struct vxlan_dev *vxlan, struct sk_buff *skb)
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hash = jhash(skb->data, 2 * ETH_ALEN,
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(__force u32) skb->protocol);
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return htons((((u64) hash * range) >> 32) + vxlan->port_min);
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return htons((((u64) hash * range) >> 32) + port_min);
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}
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EXPORT_SYMBOL_GPL(vxlan_src_port);
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static int handle_offloads(struct sk_buff *skb)
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{
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@ -1125,6 +1123,45 @@ static int handle_offloads(struct sk_buff *skb)
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return 0;
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}
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int vxlan_xmit_skb(struct net *net, struct vxlan_sock *vs,
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struct rtable *rt, struct sk_buff *skb,
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__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
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__be16 src_port, __be16 dst_port, __be32 vni)
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{
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struct vxlanhdr *vxh;
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struct udphdr *uh;
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int err;
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if (!skb->encapsulation) {
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skb_reset_inner_headers(skb);
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skb->encapsulation = 1;
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}
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vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
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vxh->vx_flags = htonl(VXLAN_FLAGS);
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vxh->vx_vni = vni;
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__skb_push(skb, sizeof(*uh));
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skb_reset_transport_header(skb);
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uh = udp_hdr(skb);
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uh->dest = dst_port;
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uh->source = src_port;
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uh->len = htons(skb->len);
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uh->check = 0;
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vxlan_set_owner(vs->sock->sk, skb);
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err = handle_offloads(skb);
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if (err)
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return err;
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return iptunnel_xmit(net, rt, skb, src, dst,
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IPPROTO_UDP, tos, ttl, df);
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}
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EXPORT_SYMBOL_GPL(vxlan_xmit_skb);
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/* Bypass encapsulation if the destination is local */
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static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
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struct vxlan_dev *dst_vxlan)
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@ -1162,8 +1199,6 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
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struct vxlan_dev *vxlan = netdev_priv(dev);
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struct rtable *rt;
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const struct iphdr *old_iph;
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struct vxlanhdr *vxh;
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struct udphdr *uh;
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struct flowi4 fl4;
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__be32 dst;
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__be16 src_port, dst_port;
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@ -1185,11 +1220,6 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
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goto drop;
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}
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if (!skb->encapsulation) {
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skb_reset_inner_headers(skb);
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skb->encapsulation = 1;
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}
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/* Need space for new headers (invalidates iph ptr) */
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if (skb_cow_head(skb, VXLAN_HEADROOM))
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goto drop;
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@ -1204,7 +1234,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
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if (tos == 1)
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tos = ip_tunnel_get_dsfield(old_iph, skb);
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src_port = vxlan_src_port(vxlan, skb);
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src_port = vxlan_src_port(vxlan->port_min, vxlan->port_max, skb);
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memset(&fl4, 0, sizeof(fl4));
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fl4.flowi4_oif = rdst->remote_ifindex;
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@ -1221,9 +1251,8 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
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if (rt->dst.dev == dev) {
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netdev_dbg(dev, "circular route to %pI4\n", &dst);
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ip_rt_put(rt);
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dev->stats.collisions++;
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goto tx_error;
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goto rt_tx_error;
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}
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/* Bypass encapsulation if the destination is local */
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@ -1238,30 +1267,16 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
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vxlan_encap_bypass(skb, vxlan, dst_vxlan);
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return;
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}
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vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
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vxh->vx_flags = htonl(VXLAN_FLAGS);
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vxh->vx_vni = htonl(vni << 8);
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__skb_push(skb, sizeof(*uh));
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skb_reset_transport_header(skb);
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uh = udp_hdr(skb);
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uh->dest = dst_port;
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uh->source = src_port;
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uh->len = htons(skb->len);
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uh->check = 0;
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vxlan_set_owner(dev, skb);
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if (handle_offloads(skb))
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goto drop;
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tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
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ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
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err = iptunnel_xmit(dev_net(dev), rt, skb, fl4.saddr, dst,
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IPPROTO_UDP, tos, ttl, df);
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err = vxlan_xmit_skb(dev_net(dev), vxlan->vn_sock, rt, skb,
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fl4.saddr, dst, tos, ttl, df,
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src_port, dst_port, htonl(vni << 8));
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if (err < 0)
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goto rt_tx_error;
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iptunnel_xmit_stats(err, &dev->stats, dev->tstats);
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return;
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@ -1270,6 +1285,8 @@ drop:
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dev->stats.tx_dropped++;
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goto tx_free;
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rt_tx_error:
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ip_rt_put(rt);
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tx_error:
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dev->stats.tx_errors++;
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tx_free:
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@ -28,4 +28,12 @@ struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
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bool no_share);
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void vxlan_sock_release(struct vxlan_sock *vs);
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int vxlan_xmit_skb(struct net *net, struct vxlan_sock *vs,
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struct rtable *rt, struct sk_buff *skb,
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__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
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__be16 src_port, __be16 dst_port, __be32 vni);
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__be16 vxlan_src_port(__u16 port_min, __u16 port_max, struct sk_buff *skb);
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#endif
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