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#ifndef __NET_DST_METADATA_H
#define __NET_DST_METADATA_H 1
#include <linux/skbuff.h>
#include <net/ip_tunnels.h>
#include <net/dst.h>
struct metadata_dst {
struct dst_entry dst;
size_t opts_len;
union {
struct ip_tunnel_info tun_info;
} u;
};
static inline struct metadata_dst *skb_metadata_dst(struct sk_buff *skb)
{
struct metadata_dst *md_dst = (struct metadata_dst *) skb_dst(skb);
if (md_dst && md_dst->dst.flags & DST_METADATA)
return md_dst;
return NULL;
}
static inline struct ip_tunnel_info *skb_tunnel_info(struct sk_buff *skb,
int family)
{
struct metadata_dst *md_dst = skb_metadata_dst(skb);
struct rtable *rt;
if (md_dst)
return &md_dst->u.tun_info;
switch (family) {
case AF_INET:
rt = (struct rtable *)skb_dst(skb);
if (rt && rt->rt_lwtstate)
return lwt_tun_info(rt->rt_lwtstate);
break;
}
return NULL;
}
static inline bool skb_valid_dst(const struct sk_buff *skb)
{
struct dst_entry *dst = skb_dst(skb);
return dst && !(dst->flags & DST_METADATA);
}
struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags);
#endif /* __NET_DST_METADATA_H */
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