static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
{
struct vxlan_port *vxlan_port = vxlan_vport(vport);
__be16 dst_port = inet_sport(vxlan_port->vs->sock->sk);
if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
return -EMSGSIZE;
return 0;
}
static int vxlan_tnl_send(struct vport *vport, struct sk_buff *skb)
{
struct ovs_key_ipv4_tunnel *tun_key;
struct net *net = ovs_dp_get_net(vport->dp);
struct vxlan_port *vxlan_port = vxlan_vport(vport);
__be16 dst_port = inet_sport(vxlan_port->vs->sock->sk);
struct vxlan_metadata md = {0};
struct rtable *rt;
__be16 src_port;
__be32 saddr;
__be16 df;
int err;
u32 vxflags;
if (unlikely(!OVS_CB(skb)->egress_tun_info)) {
err = -EINVAL;
goto error;
}
tun_key = &OVS_CB(skb)->egress_tun_info->tunnel;
/* Route lookup */
saddr = tun_key->ipv4_src;
rt = find_route(ovs_dp_get_net(vport->dp),
&saddr, tun_key->ipv4_dst,
IPPROTO_UDP, tun_key->ipv4_tos,
skb->mark);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
goto error;
}
df = tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
skb->ignore_df = 1;
src_port = udp_flow_src_port(net, skb, 0, 0, true);
md.vni = htonl(be64_to_cpu(tun_key->tun_id) << 8);
md.gbp = vxlan_ext_gbp(skb);
vxflags = vxlan_port->exts |
(tun_key->tun_flags & TUNNEL_CSUM ? VXLAN_F_UDP_CSUM : 0);
err = vxlan_xmit_skb(vxlan_port->vs, rt, skb,
saddr, tun_key->ipv4_dst,
tun_key->ipv4_tos,
tun_key->ipv4_ttl, df,
src_port, dst_port,
&md, false, vxflags);
if (err < 0)
ip_rt_put(rt);
return err;
error:
kfree_skb(skb);
return err;
}
static int vxlan_tnl_send(struct vport *vport, struct sk_buff *skb)
{
struct vxlan_port *vxlan_port = vxlan_vport(vport);
__be16 dst_port = inet_sport(vxlan_port->vs->sock->sk);
struct rtable *rt;
__be16 src_port;
__be32 saddr;
__be16 df;
int port_min;
int port_max;
int err;
if (unlikely(!OVS_CB(skb)->tun_key)) {
err = -EINVAL;
goto error;
}
/* Route lookup */
saddr = OVS_CB(skb)->tun_key->ipv4_src;
rt = find_route(ovs_dp_get_net(vport->dp),
&saddr,
OVS_CB(skb)->tun_key->ipv4_dst,
IPPROTO_UDP,
OVS_CB(skb)->tun_key->ipv4_tos,
skb->mark);
if (IS_ERR(rt)) {
err = PTR_ERR(rt);
goto error;
}
df = OVS_CB(skb)->tun_key->tun_flags & TUNNEL_DONT_FRAGMENT ?
htons(IP_DF) : 0;
skb->local_df = 1;
inet_get_local_port_range(&port_min, &port_max);
src_port = vxlan_src_port(port_min, port_max, skb);
err = vxlan_xmit_skb(vxlan_port->vs, rt, skb,
saddr, OVS_CB(skb)->tun_key->ipv4_dst,
OVS_CB(skb)->tun_key->ipv4_tos,
OVS_CB(skb)->tun_key->ipv4_ttl, df,
src_port, dst_port,
htonl(be64_to_cpu(OVS_CB(skb)->tun_key->tun_id) << 8));
if (err < 0)
ip_rt_put(rt);
error:
return err;
}
static int vxlan_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
struct ovs_tunnel_info *egress_tun_info)
{
struct net *net = ovs_dp_get_net(vport->dp);
struct vxlan_port *vxlan_port = vxlan_vport(vport);
__be16 dst_port = inet_sport(vxlan_port->vs->sock->sk);
__be16 src_port;
src_port = udp_flow_src_port(net, skb, 0, 0, true);
return ovs_tunnel_get_egress_info(egress_tun_info, net,
OVS_CB(skb)->egress_tun_info,
IPPROTO_UDP, skb->mark,
src_port, dst_port);
}
static int vxlan_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
struct ovs_tunnel_info *egress_tun_info)
{
struct net *net = ovs_dp_get_net(vport->dp);
struct vxlan_port *vxlan_port = vxlan_vport(vport);
__be16 dst_port = inet_sport(vxlan_port->vs->sock->sk);
__be16 src_port;
int port_min;
int port_max;
inet_get_local_port_range(net, &port_min, &port_max);
src_port = vxlan_src_port(port_min, port_max, skb);
return ovs_tunnel_get_egress_info(egress_tun_info, net,
OVS_CB(skb)->egress_tun_info,
IPPROTO_UDP, skb->mark,
src_port, dst_port);
}
static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb,
struct vxlan_metadata *md)
{
struct ovs_tunnel_info tun_info;
struct vxlan_port *vxlan_port;
struct vport *vport = vs->data;
struct iphdr *iph;
struct ovs_vxlan_opts opts = {
.gbp = md->gbp,
};
__be64 key;
__be16 flags;
flags = TUNNEL_KEY | (udp_hdr(skb)->check != 0 ? TUNNEL_CSUM : 0);
vxlan_port = vxlan_vport(vport);
if (vxlan_port->exts & VXLAN_F_GBP && md->gbp)
flags |= TUNNEL_VXLAN_OPT;
/* Save outer tunnel values */
iph = ip_hdr(skb);
key = cpu_to_be64(ntohl(md->vni) >> 8);
ovs_flow_tun_info_init(&tun_info, iph,
udp_hdr(skb)->source, udp_hdr(skb)->dest,
key, flags, &opts, sizeof(opts));
ovs_vport_receive(vport, skb, &tun_info);
}
static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
{
struct vxlan_port *vxlan_port = vxlan_vport(vport);
__be16 dst_port = inet_sport(vxlan_port->vs->sock->sk);
if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
return -EMSGSIZE;
if (vxlan_port->exts) {
struct nlattr *exts;
exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION);
if (!exts)
return -EMSGSIZE;
if (vxlan_port->exts & VXLAN_F_GBP &&
nla_put_flag(skb, OVS_VXLAN_EXT_GBP))
return -EMSGSIZE;
nla_nest_end(skb, exts);
}
return 0;
}
static void vxlan_tnl_destroy(struct vport *vport)
{
struct vxlan_port *vxlan_port = vxlan_vport(vport);
vxlan_sock_release(vxlan_port->vs);
ovs_vport_deferred_free(vport);
}
static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX+1] = {
[OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, },
};
