int vxlan_xmit_skb(struct vxlan_sock *vs,
struct rtable *rt, struct sk_buff *skb,
__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
__be16 src_port, __be16 dst_port, __be32 vni)
{
struct vxlanhdr *vxh;
struct udphdr *uh;
int min_headroom;
int err;
min_headroom = LL_RESERVED_SPACE(rt_dst(rt).dev) + rt_dst(rt).header_len
+ VXLAN_HLEN + sizeof(struct iphdr)
+ (vlan_tx_tag_present(skb) ? VLAN_HLEN : 0);
/* Need space for new headers (invalidates iph ptr) */
err = skb_cow_head(skb, min_headroom);
if (unlikely(err)) {
kfree_skb(skb);
return err;
}
if (vlan_tx_tag_present(skb)) {
if (unlikely(!vlan_insert_tag_set_proto(skb,
skb->vlan_proto,
vlan_tx_tag_get(skb))))
return -ENOMEM;
vlan_set_tci(skb, 0);
}
skb_reset_inner_headers(skb);
vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
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);
uh->check = 0;
vxlan_set_owner(vs->sock->sk, skb);
skb = handle_offloads(skb);
if (IS_ERR(skb))
return PTR_ERR(skb);
return iptunnel_xmit(vs->sock->sk, rt, skb, src, dst, IPPROTO_UDP,
tos, ttl, df, false);
}
int vxlan_xmit_skb(struct vxlan_sock *vs,
struct rtable *rt, struct sk_buff *skb,
__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
__be16 src_port, __be16 dst_port,
struct vxlan_metadata *md, bool xnet, u32 vxflags)
{
struct vxlanhdr *vxh;
int min_headroom;
int err;
bool udp_sum = !!(vxflags & VXLAN_F_UDP_CSUM);
skb = udp_tunnel_handle_offloads(skb, udp_sum, true);
if (IS_ERR(skb))
return PTR_ERR(skb);
min_headroom = LL_RESERVED_SPACE(rt_dst(rt).dev) + rt_dst(rt).header_len
+ VXLAN_HLEN + sizeof(struct iphdr)
+ (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
/* Need space for new headers (invalidates iph ptr) */
err = skb_cow_head(skb, min_headroom);
if (unlikely(err)) {
kfree_skb(skb);
return err;
}
skb = vlan_hwaccel_push_inside(skb);
if (WARN_ON(!skb))
return -ENOMEM;
vxh = (struct vxlanhdr *) __skb_push(skb, sizeof(*vxh));
vxh->vx_flags = htonl(VXLAN_HF_VNI);
vxh->vx_vni = md->vni;
if (vxflags & VXLAN_F_GBP)
vxlan_build_gbp_hdr(vxh, vxflags, md);
vxlan_set_owner(vs->sock->sk, skb);
ovs_skb_set_inner_protocol(skb, htons(ETH_P_TEB));
return udp_tunnel_xmit_skb(rt, skb, src, dst, tos,
ttl, df, src_port, dst_port, xnet,
!udp_sum);
}
