1 files changed, 89 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_conntrack_zones.h b/include/net/netfilter/nf_conntrack_zones.h
new file mode 100644
index 000000000..48dbadb96
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_zones.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _NF_CONNTRACK_ZONES_H
+#define _NF_CONNTRACK_ZONES_H
+
+#include <linux/netfilter/nf_conntrack_zones_common.h>
+#include <net/netfilter/nf_conntrack.h>
+
+static inline const struct nf_conntrack_zone *
+nf_ct_zone(const struct nf_conn *ct)
+{
+#ifdef CONFIG_NF_CONNTRACK_ZONES
+	return &ct->zone;
+#else
+	return &nf_ct_zone_dflt;
+#endif
+}
+
+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)
+{
+#ifdef CONFIG_NF_CONNTRACK_ZONES
+	if (!tmpl)
+		return &nf_ct_zone_dflt;
+
+	if (tmpl->zone.flags & NF_CT_FLAG_MARK)
+		return nf_ct_zone_init(tmp, skb->mark, tmpl->zone.dir, 0);
+#endif
+	return nf_ct_zone(tmpl);
+}
+
+static inline void nf_ct_zone_add(struct nf_conn *ct,
+				  const struct nf_conntrack_zone *zone)
+{
+#ifdef CONFIG_NF_CONNTRACK_ZONES
+	ct->zone = *zone;
+#endif
+}
+
+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)
+{
+#ifdef CONFIG_NF_CONNTRACK_ZONES
+	return nf_ct_zone_matches_dir(zone, dir) ?
+	       zone->id : NF_CT_DEFAULT_ZONE_ID;
+#else
+	return NF_CT_DEFAULT_ZONE_ID;
+#endif
+}
+
+static inline bool nf_ct_zone_equal(const struct nf_conn *a,
+				    const struct nf_conntrack_zone *b,
+				    enum ip_conntrack_dir dir)
+{
+#ifdef CONFIG_NF_CONNTRACK_ZONES
+	return nf_ct_zone_id(nf_ct_zone(a), dir) ==
+	       nf_ct_zone_id(b, dir);
+#else
+	return true;
+#endif
+}
+
+static inline bool nf_ct_zone_equal_any(const struct nf_conn *a,
+					const struct nf_conntrack_zone *b)
+{
+#ifdef CONFIG_NF_CONNTRACK_ZONES
+	return nf_ct_zone(a)->id == b->id;
+#else
+	return true;
+#endif
+}
+
+#endif /* _NF_CONNTRACK_ZONES_H */