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authorPravin B Shelar <pshelar@nicira.com>2013-08-19 22:22:54 +0400
committerDavid S. Miller <davem@davemloft.net>2013-08-20 11:15:43 +0400
commit7ce04758279514ca1d8ebfe322508a4a430fe2c8 (patch)
tree80a10950fd4925fda6149dbe724360938652a86e /drivers/net/vxlan.c
parent9c2e24e16fbccf6cc1102442acc4a629f79615a7 (diff)
downloadlinux-7ce04758279514ca1d8ebfe322508a4a430fe2c8.tar.xz
vxlan: Restructure vxlan receive.
Use iptunnel_pull_header() for better code sharing. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxlan.c')
-rw-r--r--drivers/net/vxlan.c22
1 files changed, 7 insertions, 15 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index b784ee668a4e..1afb9795105f 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -57,6 +57,7 @@
#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
/* IP header + UDP + VXLAN + Ethernet header */
#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
+#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
#define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */
@@ -868,15 +869,12 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
__u32 vni;
int err;
- /* pop off outer UDP header */
- __skb_pull(skb, sizeof(struct udphdr));
-
/* Need Vxlan and inner Ethernet header to be present */
- if (!pskb_may_pull(skb, sizeof(struct vxlanhdr)))
+ if (!pskb_may_pull(skb, VXLAN_HLEN))
goto error;
- /* Drop packets with reserved bits set */
- vxh = (struct vxlanhdr *) skb->data;
+ /* Return packets with reserved bits set */
+ vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
if (vxh->vx_flags != htonl(VXLAN_FLAGS) ||
(vxh->vx_vni & htonl(0xff))) {
netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
@@ -884,8 +882,6 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
goto error;
}
- __skb_pull(skb, sizeof(struct vxlanhdr));
-
/* Is this VNI defined? */
vni = ntohl(vxh->vx_vni) >> 8;
port = inet_sk(sk)->inet_sport;
@@ -896,7 +892,7 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
goto drop;
}
- if (!pskb_may_pull(skb, ETH_HLEN)) {
+ if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB))) {
vxlan->dev->stats.rx_length_errors++;
vxlan->dev->stats.rx_errors++;
goto drop;
@@ -904,8 +900,6 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
skb_reset_mac_header(skb);
- /* Re-examine inner Ethernet packet */
- oip = ip_hdr(skb);
skb->protocol = eth_type_trans(skb, vxlan->dev);
/* Ignore packet loops (and multicast echo) */
@@ -913,11 +907,12 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
vxlan->dev->dev_addr) == 0)
goto drop;
+ /* Re-examine inner Ethernet packet */
+ oip = ip_hdr(skb);
if ((vxlan->flags & VXLAN_F_LEARN) &&
vxlan_snoop(skb->dev, oip->saddr, eth_hdr(skb)->h_source))
goto drop;
- __skb_tunnel_rx(skb, vxlan->dev);
skb_reset_network_header(skb);
/* If the NIC driver gave us an encapsulated packet with
@@ -953,9 +948,6 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
return 0;
error:
- /* Put UDP header back */
- __skb_push(skb, sizeof(struct udphdr));
-
return 1;
drop:
/* Consume bad packet */