int ovs_tunnel_get_egress_info(struct ovs_tunnel_info *egress_tun_info,
struct net *net,
const struct ovs_tunnel_info *tun_info,
u8 ipproto,
u32 skb_mark,
__be16 tp_src,
__be16 tp_dst)
{
const struct ovs_key_ipv4_tunnel *tun_key;
struct rtable *rt;
struct flowi4 fl;
if (unlikely(!tun_info))
return -EINVAL;
tun_key = &tun_info->tunnel;
/* Route lookup to get srouce IP address.
* The process may need to be changed if the corresponding process
* in vports ops changed.
*/
memset(&fl, 0, sizeof(fl));
fl.daddr = tun_key->ipv4_dst;
fl.saddr = tun_key->ipv4_src;
fl.flowi4_tos = RT_TOS(tun_key->ipv4_tos);
fl.flowi4_mark = skb_mark;
fl.flowi4_proto = ipproto;
rt = ip_route_output_key(net, &fl);
if (IS_ERR(rt))
return PTR_ERR(rt);
ip_rt_put(rt);
/* Generate egress_tun_info based on tun_info,
* saddr, tp_src and tp_dst
*/
__ovs_flow_tun_info_init(egress_tun_info,
fl.saddr, tun_key->ipv4_dst,
tun_key->ipv4_tos,
tun_key->ipv4_ttl,
tp_src, tp_dst,
tun_key->tun_id,
tun_key->tun_flags,
tun_info->options,
tun_info->options_len);
return 0;
}
int ovs_tunnel_get_egress_info(struct ovs_tunnel_info *egress_tun_info,
struct net *net,
const struct ovs_tunnel_info *tun_info,
u8 ipproto,
u32 skb_mark,
__be16 tp_src,
__be16 tp_dst)
{
const struct ovs_key_ipv4_tunnel *tun_key;
struct rtable *rt;
__be32 saddr;
if (unlikely(!tun_info))
return -EINVAL;
tun_key = &tun_info->tunnel;
saddr = tun_key->ipv4_src;
/* Route lookup to get srouce IP address: saddr.
* The process may need to be changed if the corresponding process
* in vports ops changed.
*/
rt = find_route(net,
&saddr,
tun_key->ipv4_dst,
ipproto,
tun_key->ipv4_tos,
skb_mark);
if (IS_ERR(rt))
return PTR_ERR(rt);
ip_rt_put(rt);
/* Generate egress_tun_info based on tun_info,
* saddr, tp_src and tp_dst
*/
__ovs_flow_tun_info_init(egress_tun_info,
saddr, tun_key->ipv4_dst,
tun_key->ipv4_tos,
tun_key->ipv4_ttl,
tp_src, tp_dst,
tun_key->tun_id,
tun_key->tun_flags,
tun_info->options,
tun_info->options_len);
return 0;
}
