[mirror_ubuntu-bionic-kernel.git] / include / net / dst_metadata.h

#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)
{
	struct metadata_dst *md_dst = skb_metadata_dst(skb);

	if (md_dst)
		return &md_dst->u.tun_info;

	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 */
Commit	Line	Data
f38a9eb1 TG	1	#ifndef __NET_DST_METADATA_H
	2	#define __NET_DST_METADATA_H 1
	3
	4	#include <linux/skbuff.h>
	5	#include <net/ip_tunnels.h>
	6	#include <net/dst.h>
	7
	8	struct metadata_dst {
	9	struct dst_entry dst;
	10	size_t opts_len;
ee122c79 TG	11	union {
	12	struct ip_tunnel_info tun_info;
	13	} u;
f38a9eb1 TG	14	};
	15
	16	static inline struct metadata_dst skb_metadata_dst(struct sk_buff skb)
	17	{
	18	struct metadata_dst md_dst = (struct metadata_dst ) skb_dst(skb);
	19
	20	if (md_dst && md_dst->dst.flags & DST_METADATA)
	21	return md_dst;
	22
	23	return NULL;
	24	}
	25
ee122c79 TG	26	static inline struct ip_tunnel_info skb_tunnel_info(struct sk_buff skb)
	27	{
	28	struct metadata_dst *md_dst = skb_metadata_dst(skb);
	29
	30	if (md_dst)
	31	return &md_dst->u.tun_info;
	32
	33	return NULL;
	34	}
	35
f38a9eb1 TG	36	static inline bool skb_valid_dst(const struct sk_buff *skb)
	37	{
	38	struct dst_entry *dst = skb_dst(skb);
	39
	40	return dst && !(dst->flags & DST_METADATA);
	41	}
	42
	43	struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags);
	44
	45	#endif /* __NET_DST_METADATA_H */