1 files changed, 88 insertions, 0 deletions
diff --git a/include/linux/netfilter_bridge.h b/include/linux/netfilter_bridge.h
new file mode 100644
index 000000000..743475ca7
--- /dev/null
+++ b/include/linux/netfilter_bridge.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_BRIDGE_NETFILTER_H
+#define __LINUX_BRIDGE_NETFILTER_H
+
+#include <uapi/linux/netfilter_bridge.h>
+#include <linux/skbuff.h>
+
+struct nf_bridge_frag_data {
+	char    mac[ETH_HLEN];
+	bool    vlan_present;
+	u16     vlan_tci;
+	__be16  vlan_proto;
+};
+
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+
+int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
+
+static inline void br_drop_fake_rtable(struct sk_buff *skb)
+{
+	struct dst_entry *dst = skb_dst(skb);
+
+	if (dst && (dst->flags & DST_FAKE_RTABLE))
+		skb_dst_drop(skb);
+}
+
+static inline struct nf_bridge_info *
+nf_bridge_info_get(const struct sk_buff *skb)
+{
+	return skb_ext_find(skb, SKB_EXT_BRIDGE_NF);
+}
+
+static inline bool nf_bridge_info_exists(const struct sk_buff *skb)
+{
+	return skb_ext_exist(skb, SKB_EXT_BRIDGE_NF);
+}
+
+static inline int nf_bridge_get_physinif(const struct sk_buff *skb)
+{
+	const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+
+	if (!nf_bridge)
+		return 0;
+
+	return nf_bridge->physinif;
+}
+
+static inline int nf_bridge_get_physoutif(const struct sk_buff *skb)
+{
+	const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+
+	if (!nf_bridge)
+		return 0;
+
+	return nf_bridge->physoutdev ? nf_bridge->physoutdev->ifindex : 0;
+}
+
+static inline struct net_device *
+nf_bridge_get_physindev(const struct sk_buff *skb, struct net *net)
+{
+	const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+
+	return nf_bridge ? dev_get_by_index_rcu(net, nf_bridge->physinif) : NULL;
+}
+
+static inline struct net_device *
+nf_bridge_get_physoutdev(const struct sk_buff *skb)
+{
+	const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+
+	return nf_bridge ? nf_bridge->physoutdev : NULL;
+}
+
+static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
+{
+	const struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
+
+	return nf_bridge && nf_bridge->in_prerouting;
+}
+#else
+#define br_drop_fake_rtable(skb)	        do { } while (0)
+static inline bool nf_bridge_in_prerouting(const struct sk_buff *skb)
+{
+	return false;
+}
+#endif /* CONFIG_BRIDGE_NETFILTER */
+
+#endif