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#ifndef _NF_CONNTRACK_ZONES_H
#define _NF_CONNTRACK_ZONES_H
#include <linux/netfilter/nf_conntrack_zones_common.h>
#if IS_ENABLED(CONFIG_NF_CONNTRACK)
#include <net/netfilter/nf_conntrack_extend.h>
static inline const struct nf_conntrack_zone *
nf_ct_zone(const struct nf_conn *ct)
{
const struct nf_conntrack_zone *nf_ct_zone = NULL;
#ifdef CONFIG_NF_CONNTRACK_ZONES
nf_ct_zone = nf_ct_ext_find(ct, NF_CT_EXT_ZONE);
#endif
return nf_ct_zone ? nf_ct_zone : &nf_ct_zone_dflt;
}
static inline const struct nf_conntrack_zone *
nf_ct_zone_init(struct nf_conntrack_zone *zone, u16 id, u8 dir, u8 flags)
{
zone->id = id;
zone->flags = flags;
zone->dir = dir;
return zone;
}
static inline const struct nf_conntrack_zone *
nf_ct_zone_tmpl(const struct nf_conn *tmpl, const struct sk_buff *skb,
struct nf_conntrack_zone *tmp)
{
const struct nf_conntrack_zone *zone;
if (!tmpl)
return &nf_ct_zone_dflt;
zone = nf_ct_zone(tmpl);
if (zone->flags & NF_CT_FLAG_MARK)
zone = nf_ct_zone_init(tmp, skb->mark, zone->dir, 0);
return zone;
}
static inline int nf_ct_zone_add(struct nf_conn *ct, gfp_t flags,
const struct nf_conntrack_zone *info)
{
#ifdef CONFIG_NF_CONNTRACK_ZONES
struct nf_conntrack_zone *nf_ct_zone;
nf_ct_zone = nf_ct_ext_add(ct, NF_CT_EXT_ZONE, flags);
if (!nf_ct_zone)
return -ENOMEM;
nf_ct_zone_init(nf_ct_zone, info->id, info->dir,
info->flags);
#endif
return 0;
}
static inline bool nf_ct_zone_matches_dir(const struct nf_conntrack_zone *zone,
enum ip_conntrack_dir dir)
{
return zone->dir & (1 << dir);
}
static inline u16 nf_ct_zone_id(const struct nf_conntrack_zone *zone,
enum ip_conntrack_dir dir)
{
return nf_ct_zone_matches_dir(zone, dir) ?
zone->id : NF_CT_DEFAULT_ZONE_ID;
}
static inline bool nf_ct_zone_equal(const struct nf_conn *a,
const struct nf_conntrack_zone *b,
enum ip_conntrack_dir dir)
{
return nf_ct_zone_id(nf_ct_zone(a), dir) ==
nf_ct_zone_id(b, dir);
}
static inline bool nf_ct_zone_equal_any(const struct nf_conn *a,
const struct nf_conntrack_zone *b)
{
return nf_ct_zone(a)->id == b->id;
}
#endif /* IS_ENABLED(CONFIG_NF_CONNTRACK) */
#endif /* _NF_CONNTRACK_ZONES_H */
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