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vxlan: introduce vxlan_hdr 

Currently, pointer to the vxlan header is kept in a local variable. It has
to be reloaded whenever the pskb pull operations are performed which usually
happens somewhere deep in called functions.

Create a vxlan_hdr function and use it to reference the vxlan header
instead.

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Benc 2016-02-16 21:58:57 +01:00 committed by David S. Miller
parent d8ef034730
commit d4ac05ff36
2 changed files with 12 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/net/vxlan.c
View File

@ -1257,7 +1257,6 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
{
struct metadata_dst *tun_dst = NULL;
struct vxlan_sock *vs;
struct vxlanhdr *vxh;
u32 flags, vni;
struct vxlan_metadata _md;
struct vxlan_metadata *md = &_md;
@ -1266,9 +1265,8 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
if (!pskb_may_pull(skb, VXLAN_HLEN))
goto error;
vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
flags = ntohl(vxh->vx_flags);
vni = ntohl(vxh->vx_vni);
flags = ntohl(vxlan_hdr(skb)->vx_flags);
vni = ntohl(vxlan_hdr(skb)->vx_vni);
if (flags & VXLAN_HF_VNI) {
flags &= ~VXLAN_HF_VNI;
@ -1279,16 +1277,14 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
if (iptunnel_pull_header(skb, VXLAN_HLEN, htons(ETH_P_TEB)))
goto drop;
vxh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
vs = rcu_dereference_sk_user_data(sk);
if (!vs)
goto drop;
if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni,
!!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL));
if (!vxh)
if (!vxlan_remcsum(skb, vxlan_hdr(skb), sizeof(struct vxlanhdr), vni,
!!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL)))
goto drop;
flags &= ~VXLAN_HF_RCO;
@ -1313,7 +1309,7 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
if ((flags & VXLAN_HF_GBP) && (vs->flags & VXLAN_F_GBP)) {
struct vxlanhdr_gbp *gbp;
gbp = (struct vxlanhdr_gbp *)vxh;
gbp = (struct vxlanhdr_gbp *)vxlan_hdr(skb);
md->gbp = ntohs(gbp->policy_id);
if (tun_dst)
@ -1351,7 +1347,8 @@ drop:
bad_flags:
netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
ntohl(vxh->vx_flags), ntohl(vxh->vx_vni));
ntohl(vxlan_hdr(skb)->vx_flags),
ntohl(vxlan_hdr(skb)->vx_vni));
error:
if (tun_dst)

5
include/net/vxlan.h
View File

@ -262,6 +262,11 @@ static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
/* IPv6 header + UDP + VXLAN + Ethernet header */
#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb)
{
return (struct vxlanhdr *)(udp_hdr(skb) + 1);
}
#if IS_ENABLED(CONFIG_VXLAN)
void vxlan_get_rx_port(struct net_device *netdev);
#else