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Message-Id: <1410913879-31688-3-git-send-email-azhou@nicira.com>
Date: Tue, 16 Sep 2014 17:31:18 -0700
From: Andy Zhou <azhou@...ira.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, Andy Zhou <azhou@...ira.com>
Subject: [v8 net-next 3/4] 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@...ira.com>
---
drivers/net/vxlan.c | 105 +++++++++++----------------------------------------
1 file changed, 22 insertions(+), 83 deletions(-)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 53c3ec1..39c8653 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -42,6 +42,7 @@
#include <net/netns/generic.h>
#include <net/vxlan.h>
#include <net/protocol.h>
+#include <net/udp_tunnel.h>
#if IS_ENABLED(CONFIG_IPV6)
#include <net/ipv6.h>
#include <net/addrconf.h>
@@ -1062,7 +1063,6 @@ void vxlan_sock_release(struct vxlan_sock *vs)
spin_lock(&vn->sock_lock);
hlist_del_rcu(&vs->hlist);
- rcu_assign_sk_user_data(vs->sock->sk, NULL);
vxlan_notify_del_rx_port(vs);
spin_unlock(&vn->sock_lock);
@@ -1336,7 +1336,6 @@ out:
}
#if IS_ENABLED(CONFIG_IPV6)
-
static struct sk_buff *vxlan_na_create(struct sk_buff *request,
struct neighbour *n, bool isrouter)
{
@@ -1570,13 +1569,6 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
return false;
}
-static inline struct sk_buff *vxlan_handle_offloads(struct sk_buff *skb,
- bool udp_csum)
-{
- int type = udp_csum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
- return iptunnel_handle_offloads(skb, udp_csum, type);
-}
-
#if IS_ENABLED(CONFIG_IPV6)
static int vxlan6_xmit_skb(struct vxlan_sock *vs,
struct dst_entry *dst, struct sk_buff *skb,
@@ -1585,13 +1577,12 @@ static int vxlan6_xmit_skb(struct vxlan_sock *vs,
__be16 src_port, __be16 dst_port, __be32 vni,
bool xnet)
{
- struct ipv6hdr *ip6h;
struct vxlanhdr *vxh;
- struct udphdr *uh;
int min_headroom;
int err;
+ bool udp_sum = !udp_get_no_check6_tx(vs->sock->sk);
- skb = vxlan_handle_offloads(skb, !udp_get_no_check6_tx(vs->sock->sk));
+ skb = udp_tunnel_handle_offloads(skb, udp_sum);
if (IS_ERR(skb))
return -EINVAL;
@@ -1619,38 +1610,8 @@ static int vxlan6_xmit_skb(struct vxlan_sock *vs,
vxh->vx_flags = htonl(VXLAN_FLAGS);
vxh->vx_vni = vni;
- __skb_push(skb, sizeof(*uh));
- skb_reset_transport_header(skb);
- uh = udp_hdr(skb);
-
- uh->dest = dst_port;
- uh->source = src_port;
-
- uh->len = htons(skb->len);
-
- memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
- IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED |
- IPSKB_REROUTED);
- skb_dst_set(skb, dst);
-
- udp6_set_csum(udp_get_no_check6_tx(vs->sock->sk), skb,
- saddr, daddr, skb->len);
-
- __skb_push(skb, sizeof(*ip6h));
- skb_reset_network_header(skb);
- ip6h = ipv6_hdr(skb);
- ip6h->version = 6;
- ip6h->priority = prio;
- ip6h->flow_lbl[0] = 0;
- ip6h->flow_lbl[1] = 0;
- ip6h->flow_lbl[2] = 0;
- ip6h->payload_len = htons(skb->len);
- ip6h->nexthdr = IPPROTO_UDP;
- ip6h->hop_limit = ttl;
- ip6h->daddr = *daddr;
- ip6h->saddr = *saddr;
-
- ip6tunnel_xmit(skb, dev);
+ udp_tunnel6_xmit_skb(vs->sock, dst, skb, dev, saddr, daddr, prio,
+ ttl, src_port, dst_port);
return 0;
}
#endif
@@ -1661,11 +1622,11 @@ int vxlan_xmit_skb(struct vxlan_sock *vs,
__be16 src_port, __be16 dst_port, __be32 vni, bool xnet)
{
struct vxlanhdr *vxh;
- struct udphdr *uh;
int min_headroom;
int err;
+ bool udp_sum = !vs->sock->sk->sk_no_check_tx;
- skb = vxlan_handle_offloads(skb, !vs->sock->sk->sk_no_check_tx);
+ skb = udp_tunnel_handle_offloads(skb, udp_sum);
if (IS_ERR(skb))
return -EINVAL;
@@ -1691,20 +1652,8 @@ int vxlan_xmit_skb(struct vxlan_sock *vs,
vxh->vx_flags = htonl(VXLAN_FLAGS);
vxh->vx_vni = vni;
- __skb_push(skb, sizeof(*uh));
- skb_reset_transport_header(skb);
- uh = udp_hdr(skb);
-
- uh->dest = dst_port;
- uh->source = src_port;
-
- uh->len = htons(skb->len);
-
- udp_set_csum(vs->sock->sk->sk_no_check_tx, skb,
- src, dst, skb->len);
-
- return iptunnel_xmit(vs->sock->sk, rt, skb, src, dst, IPPROTO_UDP,
- tos, ttl, df, xnet);
+ return udp_tunnel_xmit_skb(vs->sock, rt, skb, src, dst, tos,
+ ttl, df, src_port, dst_port, xnet);
}
EXPORT_SYMBOL_GPL(vxlan_xmit_skb);
@@ -1829,11 +1778,11 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
- err = vxlan_xmit_skb(vxlan->vn_sock, rt, skb,
- fl4.saddr, dst->sin.sin_addr.s_addr,
- tos, ttl, df, src_port, dst_port,
- htonl(vni << 8),
- !net_eq(vxlan->net, dev_net(vxlan->dev)));
+ err = udp_tunnel_xmit_skb(vxlan->vn_sock->sock, rt, skb,
+ fl4.saddr, dst->sin.sin_addr.s_addr,
+ tos, ttl, df, src_port, dst_port,
+ !net_eq(vxlan->net,
+ dev_net(vxlan->dev)));
if (err < 0)
goto rt_tx_error;
@@ -2333,8 +2282,7 @@ static const struct ethtool_ops vxlan_ethtool_ops = {
static void vxlan_del_work(struct work_struct *work)
{
struct vxlan_sock *vs = container_of(work, struct vxlan_sock, del_work);
-
- sk_release_kernel(vs->sock->sk);
+ udp_tunnel_sock_release(vs->sock);
kfree_rcu(vs, rcu);
}
@@ -2367,11 +2315,6 @@ static struct socket *vxlan_create_sock(struct net *net, bool ipv6,
if (err < 0)
return ERR_PTR(err);
- /* Disable multicast loopback */
- inet_sk(sock->sk)->mc_loop = 0;
-
- udp_set_convert_csum(sock->sk, true);
-
return sock;
}
@@ -2383,9 +2326,9 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
struct vxlan_net *vn = net_generic(net, vxlan_net_id);
struct vxlan_sock *vs;
struct socket *sock;
- struct sock *sk;
unsigned int h;
bool ipv6 = !!(flags & VXLAN_F_IPV6);
+ struct udp_tunnel_sock_cfg tunnel_cfg;
vs = kzalloc(sizeof(*vs), GFP_KERNEL);
if (!vs)
@@ -2403,11 +2346,9 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
}
vs->sock = sock;
- sk = sock->sk;
atomic_set(&vs->refcnt, 1);
vs->rcv = rcv;
vs->data = data;
- rcu_assign_sk_user_data(vs->sock->sk, vs);
/* Initialize the vxlan udp offloads structure */
vs->udp_offloads.port = port;
@@ -2420,14 +2361,12 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, __be16 port,
spin_unlock(&vn->sock_lock);
/* Mark socket as an encapsulation socket. */
- udp_sk(sk)->encap_type = 1;
- udp_sk(sk)->encap_rcv = vxlan_udp_encap_recv;
-#if IS_ENABLED(CONFIG_IPV6)
- if (ipv6)
- ipv6_stub->udpv6_encap_enable();
- else
-#endif
- udp_encap_enable();
+ tunnel_cfg.sk_user_data = vs;
+ tunnel_cfg.encap_type = 1;
+ tunnel_cfg.encap_rcv = vxlan_udp_encap_recv;
+ tunnel_cfg.encap_destroy = NULL;
+
+ setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
return vs;
}
--
1.7.9.5
--
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