mirror of https://gitee.com/openkylin/linux.git
vxlan: Refactor vxlan driver to make use of the common UDP tunnel functions.
Simplify vxlan implementation using common UDP tunnel APIs. Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Zhou
David S. Miller
parent
6a93cc9052
commit
acbf74a763
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@ -42,6 +42,7 @@
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#include <net/netns/generic.h>
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#include <net/vxlan.h>
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#include <net/protocol.h>
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#include <net/udp_tunnel.h>
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#if IS_ENABLED(CONFIG_IPV6)
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#include <net/ipv6.h>
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#include <net/addrconf.h>
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@ -1062,7 +1063,6 @@ void vxlan_sock_release(struct vxlan_sock *vs)
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spin_lock(&vn->sock_lock);
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hlist_del_rcu(&vs->hlist);
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rcu_assign_sk_user_data(vs->sock->sk, NULL);
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vxlan_notify_del_rx_port(vs);
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spin_unlock(&vn->sock_lock);
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@ -1336,7 +1336,6 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
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}
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#if IS_ENABLED(CONFIG_IPV6)
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static struct sk_buff *vxlan_na_create(struct sk_buff *request,
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struct neighbour *n, bool isrouter)
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{
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@ -1570,13 +1569,6 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
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return false;
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}
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static inline struct sk_buff *vxlan_handle_offloads(struct sk_buff *skb,
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bool udp_csum)
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{
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int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
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return iptunnel_handle_offloads(skb, udp_csum, type);
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}
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#if IS_ENABLED(CONFIG_IPV6)
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static int vxlan6_xmit_skb(struct vxlan_sock *vs,
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struct dst_entry *dst, struct sk_buff *skb,
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@ -1585,13 +1577,12 @@ static int vxlan6_xmit_skb(struct vxlan_sock *vs,
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__be16 src_port, __be16 dst_port, __be32 vni,
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bool xnet)
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{
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struct ipv6hdr *ip6h;
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struct vxlanhdr *vxh;
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struct udphdr *uh;
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int min_headroom;
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int err;
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bool udp_sum = !udp_get_no_check6_tx(vs->sock->sk);
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skb = vxlan_handle_offloads(skb, !udp_get_no_check6_tx(vs->sock->sk));
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skb = udp_tunnel_handle_offloads(skb, udp_sum);
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if (IS_ERR(skb))
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return -EINVAL;
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@ -1619,38 +1610,8 @@ static int vxlan6_xmit_skb(struct vxlan_sock *vs,
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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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memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
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IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED |
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IPSKB_REROUTED);
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skb_dst_set(skb, dst);
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udp6_set_csum(udp_get_no_check6_tx(vs->sock->sk), skb,
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saddr, daddr, skb->len);
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__skb_push(skb, sizeof(*ip6h));
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skb_reset_network_header(skb);
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ip6h = ipv6_hdr(skb);
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ip6h->version = 6;
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ip6h->priority = prio;
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ip6h->flow_lbl[0] = 0;
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ip6h->flow_lbl[1] = 0;
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ip6h->flow_lbl[2] = 0;
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ip6h->payload_len = htons(skb->len);
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ip6h->nexthdr = IPPROTO_UDP;
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ip6h->hop_limit = ttl;
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ip6h->daddr = *daddr;
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ip6h->saddr = *saddr;
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ip6tunnel_xmit(skb, dev);
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udp_tunnel6_xmit_skb(vs->sock, dst, skb, dev, saddr, daddr, prio,
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ttl, src_port, dst_port);
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return 0;
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}
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#endif
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@ -1661,11 +1622,11 @@ int vxlan_xmit_skb(struct vxlan_sock *vs,
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__be16 src_port, __be16 dst_port, __be32 vni, bool xnet)
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{
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struct vxlanhdr *vxh;
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struct udphdr *uh;
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int min_headroom;
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int err;
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bool udp_sum = !vs->sock->sk->sk_no_check_tx;
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skb = vxlan_handle_offloads(skb, !vs->sock->sk->sk_no_check_tx);
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skb = udp_tunnel_handle_offloads(skb, udp_sum);
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if (IS_ERR(skb))
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return -EINVAL;
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@ -1691,20 +1652,8 @@ int vxlan_xmit_skb(struct vxlan_sock *vs,
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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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udp_set_csum(vs->sock->sk->sk_no_check_tx, skb,
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src, dst, skb->len);
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return iptunnel_xmit(vs->sock->sk, rt, skb, src, dst, IPPROTO_UDP,
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tos, ttl, df, xnet);
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return udp_tunnel_xmit_skb(vs->sock, rt, skb, src, dst, tos,
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ttl, df, src_port, dst_port, xnet);
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}
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EXPORT_SYMBOL_GPL(vxlan_xmit_skb);
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@ -1829,11 +1778,11 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
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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 = vxlan_xmit_skb(vxlan->vn_sock, rt, skb,
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fl4.saddr, dst->sin.sin_addr.s_addr,
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tos, ttl, df, src_port, dst_port,
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htonl(vni << 8),
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!net_eq(vxlan->net, dev_net(vxlan->dev)));
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err = udp_tunnel_xmit_skb(vxlan->vn_sock->sock, rt, skb,
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fl4.saddr, dst->sin.sin_addr.s_addr,
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tos, ttl, df, src_port, dst_port,
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!net_eq(vxlan->net,
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dev_net(vxlan->dev)));
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if (err < 0)
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goto rt_tx_error;
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@ -2333,8 +2282,7 @@ static const struct ethtool_ops vxlan_ethtool_ops = {
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static void vxlan_del_work(struct work_struct *work)
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{
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struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
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sk_release_kernel(vs->sock->sk);
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udp_tunnel_sock_release(vs->sock);
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kfree_rcu(vs, rcu);
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}
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@ -2367,11 +2315,6 @@ static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
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if (err < 0)
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return ERR_PTR(err);
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/* Disable multicast loopback */
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inet_sk(sock->sk)->mc_loop = 0;
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udp_set_convert_csum(sock->sk, true);
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return sock;
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}
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@ -2383,9 +2326,9 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
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struct vxlan_net *vn = net_generic(net, vxlan_net_id);
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struct vxlan_sock *vs;
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struct socket *sock;
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struct sock *sk;
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unsigned int h;
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bool ipv6 = !!(flags & VXLAN_F_IPV6);
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struct udp_tunnel_sock_cfg tunnel_cfg;
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vs = kzalloc(sizeof(*vs), GFP_KERNEL);
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if (!vs)
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@ -2403,11 +2346,9 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
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}
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vs->sock = sock;
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sk = sock->sk;
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atomic_set(&vs->refcnt, 1);
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vs->rcv = rcv;
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vs->data = data;
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rcu_assign_sk_user_data(vs->sock->sk, vs);
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/* Initialize the vxlan udp offloads structure */
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vs->udp_offloads.port = port;
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@ -2420,14 +2361,12 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
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spin_unlock(&vn->sock_lock);
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/* Mark socket as an encapsulation socket. */
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udp_sk(sk)->encap_type = 1;
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udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv;
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#if IS_ENABLED(CONFIG_IPV6)
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if (ipv6)
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ipv6_stub->udpv6_encap_enable();
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else
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#endif
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udp_encap_enable();
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tunnel_cfg.sk_user_data = vs;
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tunnel_cfg.encap_type = 1;
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tunnel_cfg.encap_rcv = vxlan_udp_encap_recv;
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tunnel_cfg.encap_destroy = NULL;
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setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
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return vs;
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}
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