linux/include/net/netfilter/nf_conntrack_extend.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NF_CONNTRACK_EXTEND_H
#define _NF_CONNTRACK_EXTEND_H

#include <linux/slab.h>

#include <net/netfilter/nf_conntrack.h>

enum nf_ct_ext_id {};

/* Extensions: optional stuff which isn't permanently in struct. */
struct nf_ct_ext {};

static inline bool __nf_ct_ext_exist(const struct nf_ct_ext *ext, u8 id)
{}

static inline bool nf_ct_ext_exist(const struct nf_conn *ct, u8 id)
{}

void *__nf_ct_ext_find(const struct nf_ct_ext *ext, u8 id);

static inline void *nf_ct_ext_find(const struct nf_conn *ct, u8 id)
{}

/* Add this type, returns pointer to data or NULL. */
void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp);

/* ext genid.  if ext->id != ext_genid, extensions cannot be used
 * anymore unless conntrack has CONFIRMED bit set.
 */
extern atomic_t nf_conntrack_ext_genid;
void nf_ct_ext_bump_genid(void);

#endif /* _NF_CONNTRACK_EXTEND_H */