root/include/net/netfilter/nf_conntrack_zones.h

INCLUDED FROM

DEFINITIONS

1. nf_ct_zone
2. nf_ct_zone_init
3. nf_ct_zone_tmpl
4. nf_ct_zone_add
5. nf_ct_zone_matches_dir
6. nf_ct_zone_id
7. nf_ct_zone_equal
8. nf_ct_zone_equal_any

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _NF_CONNTRACK_ZONES_H
   3 #define _NF_CONNTRACK_ZONES_H
   4 
   5 #include <linux/netfilter/nf_conntrack_zones_common.h>
   6 #include <net/netfilter/nf_conntrack.h>
   7 
   8 static inline const struct nf_conntrack_zone *
   9 nf_ct_zone(const struct nf_conn *ct)
  10 {
  11 #ifdef CONFIG_NF_CONNTRACK_ZONES
  12         return &ct->zone;
  13 #else
  14         return &nf_ct_zone_dflt;
  15 #endif
  16 }
  17 
  18 static inline const struct nf_conntrack_zone *
  19 nf_ct_zone_init(struct nf_conntrack_zone *zone, u16 id, u8 dir, u8 flags)
  20 {
  21         zone->id = id;
  22         zone->flags = flags;
  23         zone->dir = dir;
  24 
  25         return zone;
  26 }
  27 
  28 static inline const struct nf_conntrack_zone *
  29 nf_ct_zone_tmpl(const struct nf_conn *tmpl, const struct sk_buff *skb,
  30                 struct nf_conntrack_zone *tmp)
  31 {
  32 #ifdef CONFIG_NF_CONNTRACK_ZONES
  33         if (!tmpl)
  34                 return &nf_ct_zone_dflt;
  35 
  36         if (tmpl->zone.flags & NF_CT_FLAG_MARK)
  37                 return nf_ct_zone_init(tmp, skb->mark, tmpl->zone.dir, 0);
  38 #endif
  39         return nf_ct_zone(tmpl);
  40 }
  41 
  42 static inline void nf_ct_zone_add(struct nf_conn *ct,
  43                                   const struct nf_conntrack_zone *zone)
  44 {
  45 #ifdef CONFIG_NF_CONNTRACK_ZONES
  46         ct->zone = *zone;
  47 #endif
  48 }
  49 
  50 static inline bool nf_ct_zone_matches_dir(const struct nf_conntrack_zone *zone,
  51                                           enum ip_conntrack_dir dir)
  52 {
  53         return zone->dir & (1 << dir);
  54 }
  55 
  56 static inline u16 nf_ct_zone_id(const struct nf_conntrack_zone *zone,
  57                                 enum ip_conntrack_dir dir)
  58 {
  59 #ifdef CONFIG_NF_CONNTRACK_ZONES
  60         return nf_ct_zone_matches_dir(zone, dir) ?
  61                zone->id : NF_CT_DEFAULT_ZONE_ID;
  62 #else
  63         return NF_CT_DEFAULT_ZONE_ID;
  64 #endif
  65 }
  66 
  67 static inline bool nf_ct_zone_equal(const struct nf_conn *a,
  68                                     const struct nf_conntrack_zone *b,
  69                                     enum ip_conntrack_dir dir)
  70 {
  71 #ifdef CONFIG_NF_CONNTRACK_ZONES
  72         return nf_ct_zone_id(nf_ct_zone(a), dir) ==
  73                nf_ct_zone_id(b, dir);
  74 #else
  75         return true;
  76 #endif
  77 }
  78 
  79 static inline bool nf_ct_zone_equal_any(const struct nf_conn *a,
  80                                         const struct nf_conntrack_zone *b)
  81 {
  82 #ifdef CONFIG_NF_CONNTRACK_ZONES
  83         return nf_ct_zone(a)->id == b->id;
  84 #else
  85         return true;
  86 #endif
  87 }
  88 
  89 #endif /* _NF_CONNTRACK_ZONES_H */