1c5441932SPravin B Shelar #ifndef __NET_IP_TUNNELS_H 2c5441932SPravin B Shelar #define __NET_IP_TUNNELS_H 1 3c5441932SPravin B Shelar 4c5441932SPravin B Shelar #include <linux/if_tunnel.h> 5c5441932SPravin B Shelar #include <linux/netdevice.h> 6c5441932SPravin B Shelar #include <linux/skbuff.h> 77f9562a1SJiri Benc #include <linux/socket.h> 8c5441932SPravin B Shelar #include <linux/types.h> 9c5441932SPravin B Shelar #include <linux/u64_stats_sync.h> 10c5441932SPravin B Shelar #include <net/dsfield.h> 11c5441932SPravin B Shelar #include <net/gro_cells.h> 12c5441932SPravin B Shelar #include <net/inet_ecn.h> 1356328486STom Herbert #include <net/netns/generic.h> 14c5441932SPravin B Shelar #include <net/rtnetlink.h> 153093fbe7SThomas Graf #include <net/lwtunnel.h> 16e09acddfSPaolo Abeni #include <net/dst_cache.h> 17c5441932SPravin B Shelar 18c5441932SPravin B Shelar #if IS_ENABLED(CONFIG_IPV6) 19c5441932SPravin B Shelar #include <net/ipv6.h> 20c5441932SPravin B Shelar #include <net/ip6_fib.h> 21c5441932SPravin B Shelar #include <net/ip6_route.h> 22c5441932SPravin B Shelar #endif 23c5441932SPravin B Shelar 24c5441932SPravin B Shelar /* Keep error state on tunnel for 30 sec */ 25c5441932SPravin B Shelar #define IPTUNNEL_ERR_TIMEO (30*HZ) 26c5441932SPravin B Shelar 271d8fff90SThomas Graf /* Used to memset ip_tunnel padding. */ 28376534a3SJiri Benc #define IP_TUNNEL_KEY_SIZE offsetofend(struct ip_tunnel_key, tp_dst) 291d8fff90SThomas Graf 30c1ea5d67SJiri Benc /* Used to memset ipv4 address padding. */ 31c1ea5d67SJiri Benc #define IP_TUNNEL_KEY_IPV4_PAD offsetofend(struct ip_tunnel_key, u.ipv4.dst) 32c1ea5d67SJiri Benc #define IP_TUNNEL_KEY_IPV4_PAD_LEN \ 33c1ea5d67SJiri Benc (FIELD_SIZEOF(struct ip_tunnel_key, u) - \ 34c1ea5d67SJiri Benc FIELD_SIZEOF(struct ip_tunnel_key, u.ipv4)) 35c1ea5d67SJiri Benc 361d8fff90SThomas Graf struct ip_tunnel_key { 371d8fff90SThomas Graf __be64 tun_id; 38c1ea5d67SJiri Benc union { 39c1ea5d67SJiri Benc struct { 40c1ea5d67SJiri Benc __be32 src; 41c1ea5d67SJiri Benc __be32 dst; 42c1ea5d67SJiri Benc } ipv4; 43c1ea5d67SJiri Benc struct { 44c1ea5d67SJiri Benc struct in6_addr src; 45c1ea5d67SJiri Benc struct in6_addr dst; 46c1ea5d67SJiri Benc } ipv6; 47c1ea5d67SJiri Benc } u; 481d8fff90SThomas Graf __be16 tun_flags; 497c383fb2SJiri Benc u8 tos; /* TOS for IPv4, TC for IPv6 */ 507c383fb2SJiri Benc u8 ttl; /* TTL for IPv4, HL for IPv6 */ 511d8fff90SThomas Graf __be16 tp_src; 521d8fff90SThomas Graf __be16 tp_dst; 53ac1cf399SJiri Benc }; 541d8fff90SThomas Graf 5546fa062aSJiri Benc /* Flags for ip_tunnel_info mode. */ 5646fa062aSJiri Benc #define IP_TUNNEL_INFO_TX 0x01 /* represents tx tunnel parameters */ 577f9562a1SJiri Benc #define IP_TUNNEL_INFO_IPV6 0x02 /* key contains IPv6 addresses */ 58ee122c79SThomas Graf 591d8fff90SThomas Graf struct ip_tunnel_info { 601d8fff90SThomas Graf struct ip_tunnel_key key; 61d71785ffSPaolo Abeni #ifdef CONFIG_DST_CACHE 62d71785ffSPaolo Abeni struct dst_cache dst_cache; 63d71785ffSPaolo Abeni #endif 641d8fff90SThomas Graf u8 options_len; 65ee122c79SThomas Graf u8 mode; 661d8fff90SThomas Graf }; 671d8fff90SThomas Graf 68c5441932SPravin B Shelar /* 6rd prefix/relay information */ 69c5441932SPravin B Shelar #ifdef CONFIG_IPV6_SIT_6RD 70c5441932SPravin B Shelar struct ip_tunnel_6rd_parm { 71c5441932SPravin B Shelar struct in6_addr prefix; 72c5441932SPravin B Shelar __be32 relay_prefix; 73c5441932SPravin B Shelar u16 prefixlen; 74c5441932SPravin B Shelar u16 relay_prefixlen; 75c5441932SPravin B Shelar }; 76c5441932SPravin B Shelar #endif 77c5441932SPravin B Shelar 7856328486STom Herbert struct ip_tunnel_encap { 796b8847c5SJiri Benc u16 type; 806b8847c5SJiri Benc u16 flags; 8156328486STom Herbert __be16 sport; 8256328486STom Herbert __be16 dport; 8356328486STom Herbert }; 8456328486STom Herbert 85c5441932SPravin B Shelar struct ip_tunnel_prl_entry { 86c5441932SPravin B Shelar struct ip_tunnel_prl_entry __rcu *next; 87c5441932SPravin B Shelar __be32 addr; 88c5441932SPravin B Shelar u16 flags; 89c5441932SPravin B Shelar struct rcu_head rcu_head; 90c5441932SPravin B Shelar }; 91c5441932SPravin B Shelar 922e15ea39SPravin B Shelar struct metadata_dst; 932e15ea39SPravin B Shelar 94c5441932SPravin B Shelar struct ip_tunnel { 95c5441932SPravin B Shelar struct ip_tunnel __rcu *next; 96c5441932SPravin B Shelar struct hlist_node hash_node; 97c5441932SPravin B Shelar struct net_device *dev; 985e6700b3SNicolas Dichtel struct net *net; /* netns for packet i/o */ 99c5441932SPravin B Shelar 100c5441932SPravin B Shelar int err_count; /* Number of arrived ICMP errors */ 101c5441932SPravin B Shelar unsigned long err_time; /* Time when the last ICMP error 102c5441932SPravin B Shelar * arrived */ 103c5441932SPravin B Shelar 104c5441932SPravin B Shelar /* These four fields used only by GRE */ 1056b8847c5SJiri Benc u32 i_seqno; /* The last seen seqno */ 1066b8847c5SJiri Benc u32 o_seqno; /* The last output seqno */ 10756328486STom Herbert int tun_hlen; /* Precalculated header length */ 108c5441932SPravin B Shelar int mlink; 109c5441932SPravin B Shelar 110e09acddfSPaolo Abeni struct dst_cache dst_cache; 1117d442fabSTom Herbert 112c5441932SPravin B Shelar struct ip_tunnel_parm parms; 113c5441932SPravin B Shelar 11456328486STom Herbert int encap_hlen; /* Encap header length (FOU,GUE) */ 11556328486STom Herbert struct ip_tunnel_encap encap; 11656328486STom Herbert 11756328486STom Herbert int hlen; /* tun_hlen + encap_hlen */ 11856328486STom Herbert 119c5441932SPravin B Shelar /* for SIT */ 120c5441932SPravin B Shelar #ifdef CONFIG_IPV6_SIT_6RD 121c5441932SPravin B Shelar struct ip_tunnel_6rd_parm ip6rd; 122c5441932SPravin B Shelar #endif 123c5441932SPravin B Shelar struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */ 124c5441932SPravin B Shelar unsigned int prl_count; /* # of entries in PRL */ 125c5441932SPravin B Shelar int ip_tnl_net_id; 126c5441932SPravin B Shelar struct gro_cells gro_cells; 1272e15ea39SPravin B Shelar bool collect_md; 128c5441932SPravin B Shelar }; 129c5441932SPravin B Shelar 130c5441932SPravin B Shelar #define TUNNEL_CSUM __cpu_to_be16(0x01) 131c5441932SPravin B Shelar #define TUNNEL_ROUTING __cpu_to_be16(0x02) 132c5441932SPravin B Shelar #define TUNNEL_KEY __cpu_to_be16(0x04) 133c5441932SPravin B Shelar #define TUNNEL_SEQ __cpu_to_be16(0x08) 134c5441932SPravin B Shelar #define TUNNEL_STRICT __cpu_to_be16(0x10) 135c5441932SPravin B Shelar #define TUNNEL_REC __cpu_to_be16(0x20) 136c5441932SPravin B Shelar #define TUNNEL_VERSION __cpu_to_be16(0x40) 137c5441932SPravin B Shelar #define TUNNEL_NO_KEY __cpu_to_be16(0x80) 1389a628224SPravin B Shelar #define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100) 1390b5e8b8eSAndy Zhou #define TUNNEL_OAM __cpu_to_be16(0x0200) 1400b5e8b8eSAndy Zhou #define TUNNEL_CRIT_OPT __cpu_to_be16(0x0400) 1411dd144cfSThomas Graf #define TUNNEL_GENEVE_OPT __cpu_to_be16(0x0800) 1421dd144cfSThomas Graf #define TUNNEL_VXLAN_OPT __cpu_to_be16(0x1000) 143db3c6139SDaniel Borkmann #define TUNNEL_NOCACHE __cpu_to_be16(0x2000) 1441dd144cfSThomas Graf 1451dd144cfSThomas Graf #define TUNNEL_OPTIONS_PRESENT (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT) 146c5441932SPravin B Shelar 147c5441932SPravin B Shelar struct tnl_ptk_info { 148c5441932SPravin B Shelar __be16 flags; 149c5441932SPravin B Shelar __be16 proto; 150c5441932SPravin B Shelar __be32 key; 151c5441932SPravin B Shelar __be32 seq; 152c5441932SPravin B Shelar }; 153c5441932SPravin B Shelar 154c5441932SPravin B Shelar #define PACKET_RCVD 0 155c5441932SPravin B Shelar #define PACKET_REJECT 1 156c5441932SPravin B Shelar 1576261d983Sstephen hemminger #define IP_TNL_HASH_BITS 7 158c5441932SPravin B Shelar #define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS) 159c5441932SPravin B Shelar 160c5441932SPravin B Shelar struct ip_tunnel_net { 161c5441932SPravin B Shelar struct net_device *fb_tunnel_dev; 1626261d983Sstephen hemminger struct hlist_head tunnels[IP_TNL_HASH_SIZE]; 1632e15ea39SPravin B Shelar struct ip_tunnel __rcu *collect_md_tun; 164c5441932SPravin B Shelar }; 165c5441932SPravin B Shelar 166a8c5f90fSTom Herbert struct ip_tunnel_encap_ops { 167a8c5f90fSTom Herbert size_t (*encap_hlen)(struct ip_tunnel_encap *e); 168a8c5f90fSTom Herbert int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e, 169a8c5f90fSTom Herbert u8 *protocol, struct flowi4 *fl4); 170a8c5f90fSTom Herbert }; 171a8c5f90fSTom Herbert 172a8c5f90fSTom Herbert #define MAX_IPTUN_ENCAP_OPS 8 173a8c5f90fSTom Herbert 174a8c5f90fSTom Herbert extern const struct ip_tunnel_encap_ops __rcu * 175a8c5f90fSTom Herbert iptun_encaps[MAX_IPTUN_ENCAP_OPS]; 176a8c5f90fSTom Herbert 177a8c5f90fSTom Herbert int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op, 178a8c5f90fSTom Herbert unsigned int num); 179a8c5f90fSTom Herbert int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op, 180a8c5f90fSTom Herbert unsigned int num); 181a8c5f90fSTom Herbert 1824c222798SPravin B Shelar static inline void ip_tunnel_key_init(struct ip_tunnel_key *key, 1831d8fff90SThomas Graf __be32 saddr, __be32 daddr, 1841d8fff90SThomas Graf u8 tos, u8 ttl, 1851d8fff90SThomas Graf __be16 tp_src, __be16 tp_dst, 1864c222798SPravin B Shelar __be64 tun_id, __be16 tun_flags) 1871d8fff90SThomas Graf { 1884c222798SPravin B Shelar key->tun_id = tun_id; 1894c222798SPravin B Shelar key->u.ipv4.src = saddr; 1904c222798SPravin B Shelar key->u.ipv4.dst = daddr; 1914c222798SPravin B Shelar memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD, 192c1ea5d67SJiri Benc 0, IP_TUNNEL_KEY_IPV4_PAD_LEN); 1934c222798SPravin B Shelar key->tos = tos; 1944c222798SPravin B Shelar key->ttl = ttl; 1954c222798SPravin B Shelar key->tun_flags = tun_flags; 1961d8fff90SThomas Graf 1971d8fff90SThomas Graf /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of 1981d8fff90SThomas Graf * the upper tunnel are used. 1991d8fff90SThomas Graf * E.g: GRE over IPSEC, the tp_src and tp_port are zero. 2001d8fff90SThomas Graf */ 2014c222798SPravin B Shelar key->tp_src = tp_src; 2024c222798SPravin B Shelar key->tp_dst = tp_dst; 2031d8fff90SThomas Graf 2041d8fff90SThomas Graf /* Clear struct padding. */ 2054c222798SPravin B Shelar if (sizeof(*key) != IP_TUNNEL_KEY_SIZE) 2064c222798SPravin B Shelar memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE, 2074c222798SPravin B Shelar 0, sizeof(*key) - IP_TUNNEL_KEY_SIZE); 2081d8fff90SThomas Graf } 2091d8fff90SThomas Graf 210db3c6139SDaniel Borkmann static inline bool 211db3c6139SDaniel Borkmann ip_tunnel_dst_cache_usable(const struct sk_buff *skb, 212db3c6139SDaniel Borkmann const struct ip_tunnel_info *info) 213db3c6139SDaniel Borkmann { 214db3c6139SDaniel Borkmann if (skb->mark) 215db3c6139SDaniel Borkmann return false; 216db3c6139SDaniel Borkmann if (!info) 217db3c6139SDaniel Borkmann return true; 218db3c6139SDaniel Borkmann if (info->key.tun_flags & TUNNEL_NOCACHE) 219db3c6139SDaniel Borkmann return false; 220db3c6139SDaniel Borkmann 221db3c6139SDaniel Borkmann return true; 222db3c6139SDaniel Borkmann } 223db3c6139SDaniel Borkmann 2247f9562a1SJiri Benc static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info 2257f9562a1SJiri Benc *tun_info) 2267f9562a1SJiri Benc { 2277f9562a1SJiri Benc return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET; 2287f9562a1SJiri Benc } 2297f9562a1SJiri Benc 2305243b6acSJesse Gross #ifdef CONFIG_INET 2315243b6acSJesse Gross 232c5441932SPravin B Shelar int ip_tunnel_init(struct net_device *dev); 233c5441932SPravin B Shelar void ip_tunnel_uninit(struct net_device *dev); 234c5441932SPravin B Shelar void ip_tunnel_dellink(struct net_device *dev, struct list_head *head); 2351728d4faSNicolas Dichtel struct net *ip_tunnel_get_link_net(const struct net_device *dev); 2361e99584bSNicolas Dichtel int ip_tunnel_get_iflink(const struct net_device *dev); 237d3b6f614SEric Dumazet int ip_tunnel_init_net(struct net *net, int ip_tnl_net_id, 238c5441932SPravin B Shelar struct rtnl_link_ops *ops, char *devname); 239c5441932SPravin B Shelar 2406c742e71SNicolas Dichtel void ip_tunnel_delete_net(struct ip_tunnel_net *itn, struct rtnl_link_ops *ops); 241c5441932SPravin B Shelar 242c5441932SPravin B Shelar void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, 243bf3d6a8fSNicolas Dichtel const struct iphdr *tnl_params, const u8 protocol); 244c5441932SPravin B Shelar int ip_tunnel_ioctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd); 24556328486STom Herbert int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t, 24656328486STom Herbert u8 *protocol, struct flowi4 *fl4); 2477e059158SDavid Wragg int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict); 248c5441932SPravin B Shelar int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu); 249c5441932SPravin B Shelar 250c5441932SPravin B Shelar struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev, 251c5441932SPravin B Shelar struct rtnl_link_stats64 *tot); 252c5441932SPravin B Shelar struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn, 253c5441932SPravin B Shelar int link, __be16 flags, 254c5441932SPravin B Shelar __be32 remote, __be32 local, 255c5441932SPravin B Shelar __be32 key); 256c5441932SPravin B Shelar 257c5441932SPravin B Shelar int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, 2582e15ea39SPravin B Shelar const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, 2592e15ea39SPravin B Shelar bool log_ecn_error); 260c5441932SPravin B Shelar int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[], 261c5441932SPravin B Shelar struct ip_tunnel_parm *p); 262c5441932SPravin B Shelar int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[], 263c5441932SPravin B Shelar struct ip_tunnel_parm *p); 264c5441932SPravin B Shelar void ip_tunnel_setup(struct net_device *dev, int net_id); 26556328486STom Herbert int ip_tunnel_encap_setup(struct ip_tunnel *t, 26656328486STom Herbert struct ip_tunnel_encap *ipencap); 267c5441932SPravin B Shelar 268c5441932SPravin B Shelar /* Extract dsfield from inner protocol */ 269c5441932SPravin B Shelar static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph, 270c5441932SPravin B Shelar const struct sk_buff *skb) 271c5441932SPravin B Shelar { 272c5441932SPravin B Shelar if (skb->protocol == htons(ETH_P_IP)) 273c5441932SPravin B Shelar return iph->tos; 274c5441932SPravin B Shelar else if (skb->protocol == htons(ETH_P_IPV6)) 275c5441932SPravin B Shelar return ipv6_get_dsfield((const struct ipv6hdr *)iph); 276c5441932SPravin B Shelar else 277c5441932SPravin B Shelar return 0; 278c5441932SPravin B Shelar } 279c5441932SPravin B Shelar 280c5441932SPravin B Shelar /* Propogate ECN bits out */ 281c5441932SPravin B Shelar static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph, 282c5441932SPravin B Shelar const struct sk_buff *skb) 283c5441932SPravin B Shelar { 284c5441932SPravin B Shelar u8 inner = ip_tunnel_get_dsfield(iph, skb); 285c5441932SPravin B Shelar 286c5441932SPravin B Shelar return INET_ECN_encapsulate(tos, inner); 287c5441932SPravin B Shelar } 288c5441932SPravin B Shelar 2897f290c94SJiri Benc int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto, 2907f290c94SJiri Benc bool xnet); 291039f5062SPravin B Shelar void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, 2926b8847c5SJiri Benc __be32 src, __be32 dst, u8 proto, 2936b8847c5SJiri Benc u8 tos, u8 ttl, __be16 df, bool xnet); 29463d008a4SJiri Benc struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, 29563d008a4SJiri Benc gfp_t flags); 2960e6fbc5bSPravin B Shelar 2976fa79666SEdward Cree struct sk_buff *iptunnel_handle_offloads(struct sk_buff *skb, int gso_type_mask); 2982d26f0a3SEric Dumazet 299039f5062SPravin B Shelar static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len) 300c5441932SPravin B Shelar { 301039f5062SPravin B Shelar if (pkt_len > 0) { 302039f5062SPravin B Shelar struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats); 303c5441932SPravin B Shelar 304c5441932SPravin B Shelar u64_stats_update_begin(&tstats->syncp); 305039f5062SPravin B Shelar tstats->tx_bytes += pkt_len; 306c5441932SPravin B Shelar tstats->tx_packets++; 307c5441932SPravin B Shelar u64_stats_update_end(&tstats->syncp); 308b4fe85f9SJason A. Donenfeld put_cpu_ptr(tstats); 309039f5062SPravin B Shelar } else { 310039f5062SPravin B Shelar struct net_device_stats *err_stats = &dev->stats; 311039f5062SPravin B Shelar 312039f5062SPravin B Shelar if (pkt_len < 0) { 3130e6fbc5bSPravin B Shelar err_stats->tx_errors++; 3140e6fbc5bSPravin B Shelar err_stats->tx_aborted_errors++; 315c5441932SPravin B Shelar } else { 3160e6fbc5bSPravin B Shelar err_stats->tx_dropped++; 317c5441932SPravin B Shelar } 318c5441932SPravin B Shelar } 319039f5062SPravin B Shelar } 3205243b6acSJesse Gross 3214c222798SPravin B Shelar static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info) 322ee122c79SThomas Graf { 323ee122c79SThomas Graf return info + 1; 324ee122c79SThomas Graf } 325ee122c79SThomas Graf 3264c222798SPravin B Shelar static inline void ip_tunnel_info_opts_get(void *to, 3274c222798SPravin B Shelar const struct ip_tunnel_info *info) 3284c222798SPravin B Shelar { 3294c222798SPravin B Shelar memcpy(to, info + 1, info->options_len); 3304c222798SPravin B Shelar } 3314c222798SPravin B Shelar 3324c222798SPravin B Shelar static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, 3334c222798SPravin B Shelar const void *from, int len) 3344c222798SPravin B Shelar { 3354c222798SPravin B Shelar memcpy(ip_tunnel_info_opts(info), from, len); 3364c222798SPravin B Shelar info->options_len = len; 3374c222798SPravin B Shelar } 3384c222798SPravin B Shelar 3393093fbe7SThomas Graf static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) 3403093fbe7SThomas Graf { 3413093fbe7SThomas Graf return (struct ip_tunnel_info *)lwtstate->data; 3423093fbe7SThomas Graf } 3433093fbe7SThomas Graf 344e7030878SThomas Graf extern struct static_key ip_tunnel_metadata_cnt; 345e7030878SThomas Graf 346e7030878SThomas Graf /* Returns > 0 if metadata should be collected */ 347e7030878SThomas Graf static inline int ip_tunnel_collect_metadata(void) 348e7030878SThomas Graf { 349e7030878SThomas Graf return static_key_false(&ip_tunnel_metadata_cnt); 350e7030878SThomas Graf } 351e7030878SThomas Graf 352045a0fa0SThomas Graf void __init ip_tunnel_core_init(void); 353045a0fa0SThomas Graf 354e7030878SThomas Graf void ip_tunnel_need_metadata(void); 355e7030878SThomas Graf void ip_tunnel_unneed_metadata(void); 356e7030878SThomas Graf 35705283187SThomas Graf #else /* CONFIG_INET */ 35805283187SThomas Graf 35905283187SThomas Graf static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) 36005283187SThomas Graf { 36105283187SThomas Graf return NULL; 36205283187SThomas Graf } 36305283187SThomas Graf 36405283187SThomas Graf static inline void ip_tunnel_need_metadata(void) 36505283187SThomas Graf { 36605283187SThomas Graf } 36705283187SThomas Graf 36805283187SThomas Graf static inline void ip_tunnel_unneed_metadata(void) 36905283187SThomas Graf { 37005283187SThomas Graf } 37105283187SThomas Graf 372*e28e87edSDaniel Borkmann static inline void ip_tunnel_info_opts_get(void *to, 373*e28e87edSDaniel Borkmann const struct ip_tunnel_info *info) 374*e28e87edSDaniel Borkmann { 375*e28e87edSDaniel Borkmann } 376*e28e87edSDaniel Borkmann 377*e28e87edSDaniel Borkmann static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, 378*e28e87edSDaniel Borkmann const void *from, int len) 379*e28e87edSDaniel Borkmann { 380*e28e87edSDaniel Borkmann info->options_len = 0; 381*e28e87edSDaniel Borkmann } 382*e28e87edSDaniel Borkmann 3835243b6acSJesse Gross #endif /* CONFIG_INET */ 3845243b6acSJesse Gross 385c5441932SPravin B Shelar #endif /* __NET_IP_TUNNELS_H */ 386