1 files changed, 15 insertions, 0 deletions

diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index 5f28b606633e..e1395d70fb48 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -140,6 +140,7 @@ struct ip_tunnel {
 #define TUNNEL_CRIT_OPT         __cpu_to_be16(0x0400)
 #define TUNNEL_GENEVE_OPT       __cpu_to_be16(0x0800)
 #define TUNNEL_VXLAN_OPT        __cpu_to_be16(0x1000)
+#define TUNNEL_NOCACHE          __cpu_to_be16(0x2000)
 
 #define TUNNEL_OPTIONS_PRESENT  (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT)
 
@@ -206,6 +207,20 @@ static inline void ip_tunnel_key_init(struct ip_tunnel_key *key,
                        0, sizeof(*key) - IP_TUNNEL_KEY_SIZE);
 }
 
+static inline bool
+ip_tunnel_dst_cache_usable(const struct sk_buff *skb,
+                           const struct ip_tunnel_info *info)
+{
+        if (skb->mark)
+                return false;
+        if (!info)
+                return true;
+        if (info->key.tun_flags & TUNNEL_NOCACHE)
+                return false;
+
+        return true;
+}
+
 static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info
                                                *tun_info)
 {