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-rw-r--r--include/net/dst_metadata.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/include/net/dst_metadata.h b/include/net/dst_metadata.h
index 2cb52d562272..60c03326c087 100644
--- a/include/net/dst_metadata.h
+++ b/include/net/dst_metadata.h
@@ -48,4 +48,65 @@ static inline bool skb_valid_dst(const struct sk_buff *skb)
struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags);
struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags);
+static inline struct metadata_dst *tun_rx_dst(__be16 flags,
+ __be64 tunnel_id, int md_size)
+{
+ struct metadata_dst *tun_dst;
+ struct ip_tunnel_info *info;
+
+ tun_dst = metadata_dst_alloc(md_size, GFP_ATOMIC);
+ if (!tun_dst)
+ return NULL;
+
+ info = &tun_dst->u.tun_info;
+ info->mode = IP_TUNNEL_INFO_RX;
+ info->key.tun_flags = flags;
+ info->key.tun_id = tunnel_id;
+ info->key.tp_src = 0;
+ info->key.tp_dst = 0;
+ return tun_dst;
+}
+
+static inline struct metadata_dst *ip_tun_rx_dst(struct sk_buff *skb,
+ __be16 flags,
+ __be64 tunnel_id,
+ int md_size)
+{
+ const struct iphdr *iph = ip_hdr(skb);
+ struct metadata_dst *tun_dst;
+ struct ip_tunnel_info *info;
+
+ tun_dst = tun_rx_dst(flags, tunnel_id, md_size);
+ if (!tun_dst)
+ return NULL;
+
+ info = &tun_dst->u.tun_info;
+ info->key.u.ipv4.src = iph->saddr;
+ info->key.u.ipv4.dst = iph->daddr;
+ info->key.tos = iph->tos;
+ info->key.ttl = iph->ttl;
+ return tun_dst;
+}
+
+static inline struct metadata_dst *ipv6_tun_rx_dst(struct sk_buff *skb,
+ __be16 flags,
+ __be64 tunnel_id,
+ int md_size)
+{
+ const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+ struct metadata_dst *tun_dst;
+ struct ip_tunnel_info *info;
+
+ tun_dst = tun_rx_dst(flags, tunnel_id, md_size);
+ if (!tun_dst)
+ return NULL;
+
+ info = &tun_dst->u.tun_info;
+ info->key.u.ipv6.src = ip6h->saddr;
+ info->key.u.ipv6.dst = ip6h->daddr;
+ info->key.tos = ipv6_get_dsfield(ip6h);
+ info->key.ttl = ip6h->hop_limit;
+ return tun_dst;
+}
+
#endif /* __NET_DST_METADATA_H */