Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 1 | #ifndef __NET_IP_TUNNELS_H |
| 2 | #define __NET_IP_TUNNELS_H 1 |
| 3 | |
| 4 | #include <linux/if_tunnel.h> |
| 5 | #include <linux/netdevice.h> |
| 6 | #include <linux/skbuff.h> |
| 7 | #include <linux/types.h> |
| 8 | #include <linux/u64_stats_sync.h> |
| 9 | #include <net/dsfield.h> |
| 10 | #include <net/gro_cells.h> |
| 11 | #include <net/inet_ecn.h> |
Tom Herbert | 5632848 | 2014-09-17 12:25:58 -0700 | [diff] [blame] | 12 | #include <net/netns/generic.h> |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 13 | #include <net/rtnetlink.h> |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 14 | #include <net/lwtunnel.h> |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 15 | |
| 16 | #if IS_ENABLED(CONFIG_IPV6) |
| 17 | #include <net/ipv6.h> |
| 18 | #include <net/ip6_fib.h> |
| 19 | #include <net/ip6_route.h> |
| 20 | #endif |
| 21 | |
| 22 | /* Keep error state on tunnel for 30 sec */ |
| 23 | #define IPTUNNEL_ERR_TIMEO (30*HZ) |
| 24 | |
Thomas Graf | 1d8fff9 | 2015-07-21 10:43:54 +0200 | [diff] [blame] | 25 | /* Used to memset ip_tunnel padding. */ |
Jiri Benc | 376534a | 2015-08-20 13:56:22 +0200 | [diff] [blame^] | 26 | #define IP_TUNNEL_KEY_SIZE offsetofend(struct ip_tunnel_key, tp_dst) |
Thomas Graf | 1d8fff9 | 2015-07-21 10:43:54 +0200 | [diff] [blame] | 27 | |
| 28 | struct ip_tunnel_key { |
| 29 | __be64 tun_id; |
| 30 | __be32 ipv4_src; |
| 31 | __be32 ipv4_dst; |
| 32 | __be16 tun_flags; |
Jiri Benc | 6b8847c | 2015-08-20 13:56:21 +0200 | [diff] [blame] | 33 | u8 ipv4_tos; |
| 34 | u8 ipv4_ttl; |
Thomas Graf | 1d8fff9 | 2015-07-21 10:43:54 +0200 | [diff] [blame] | 35 | __be16 tp_src; |
| 36 | __be16 tp_dst; |
Jiri Benc | ac1cf39 | 2015-08-20 13:56:20 +0200 | [diff] [blame] | 37 | }; |
Thomas Graf | 1d8fff9 | 2015-07-21 10:43:54 +0200 | [diff] [blame] | 38 | |
Thomas Graf | ee122c7 | 2015-07-21 10:43:58 +0200 | [diff] [blame] | 39 | /* Indicates whether the tunnel info structure represents receive |
| 40 | * or transmit tunnel parameters. |
| 41 | */ |
| 42 | enum { |
| 43 | IP_TUNNEL_INFO_RX, |
| 44 | IP_TUNNEL_INFO_TX, |
| 45 | }; |
| 46 | |
Thomas Graf | 1d8fff9 | 2015-07-21 10:43:54 +0200 | [diff] [blame] | 47 | struct ip_tunnel_info { |
| 48 | struct ip_tunnel_key key; |
| 49 | const void *options; |
| 50 | u8 options_len; |
Thomas Graf | ee122c7 | 2015-07-21 10:43:58 +0200 | [diff] [blame] | 51 | u8 mode; |
Thomas Graf | 1d8fff9 | 2015-07-21 10:43:54 +0200 | [diff] [blame] | 52 | }; |
| 53 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 54 | /* 6rd prefix/relay information */ |
| 55 | #ifdef CONFIG_IPV6_SIT_6RD |
| 56 | struct ip_tunnel_6rd_parm { |
| 57 | struct in6_addr prefix; |
| 58 | __be32 relay_prefix; |
| 59 | u16 prefixlen; |
| 60 | u16 relay_prefixlen; |
| 61 | }; |
| 62 | #endif |
| 63 | |
Tom Herbert | 5632848 | 2014-09-17 12:25:58 -0700 | [diff] [blame] | 64 | struct ip_tunnel_encap { |
Jiri Benc | 6b8847c | 2015-08-20 13:56:21 +0200 | [diff] [blame] | 65 | u16 type; |
| 66 | u16 flags; |
Tom Herbert | 5632848 | 2014-09-17 12:25:58 -0700 | [diff] [blame] | 67 | __be16 sport; |
| 68 | __be16 dport; |
| 69 | }; |
| 70 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 71 | struct ip_tunnel_prl_entry { |
| 72 | struct ip_tunnel_prl_entry __rcu *next; |
| 73 | __be32 addr; |
| 74 | u16 flags; |
| 75 | struct rcu_head rcu_head; |
| 76 | }; |
| 77 | |
Tom Herbert | 9a4aa9a | 2014-01-02 11:48:33 -0800 | [diff] [blame] | 78 | struct ip_tunnel_dst { |
| 79 | struct dst_entry __rcu *dst; |
Dmitry Popov | 95cb574 | 2014-07-29 03:07:52 +0400 | [diff] [blame] | 80 | __be32 saddr; |
Tom Herbert | 9a4aa9a | 2014-01-02 11:48:33 -0800 | [diff] [blame] | 81 | }; |
| 82 | |
Pravin B Shelar | 2e15ea3 | 2015-08-07 23:51:42 -0700 | [diff] [blame] | 83 | struct metadata_dst; |
| 84 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 85 | struct ip_tunnel { |
| 86 | struct ip_tunnel __rcu *next; |
| 87 | struct hlist_node hash_node; |
| 88 | struct net_device *dev; |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 89 | struct net *net; /* netns for packet i/o */ |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 90 | |
| 91 | int err_count; /* Number of arrived ICMP errors */ |
| 92 | unsigned long err_time; /* Time when the last ICMP error |
| 93 | * arrived */ |
| 94 | |
| 95 | /* These four fields used only by GRE */ |
Jiri Benc | 6b8847c | 2015-08-20 13:56:21 +0200 | [diff] [blame] | 96 | u32 i_seqno; /* The last seen seqno */ |
| 97 | u32 o_seqno; /* The last output seqno */ |
Tom Herbert | 5632848 | 2014-09-17 12:25:58 -0700 | [diff] [blame] | 98 | int tun_hlen; /* Precalculated header length */ |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 99 | int mlink; |
| 100 | |
Tom Herbert | 9a4aa9a | 2014-01-02 11:48:33 -0800 | [diff] [blame] | 101 | struct ip_tunnel_dst __percpu *dst_cache; |
Tom Herbert | 7d442fa | 2014-01-02 11:48:26 -0800 | [diff] [blame] | 102 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 103 | struct ip_tunnel_parm parms; |
| 104 | |
Tom Herbert | 5632848 | 2014-09-17 12:25:58 -0700 | [diff] [blame] | 105 | int encap_hlen; /* Encap header length (FOU,GUE) */ |
| 106 | struct ip_tunnel_encap encap; |
| 107 | |
| 108 | int hlen; /* tun_hlen + encap_hlen */ |
| 109 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 110 | /* for SIT */ |
| 111 | #ifdef CONFIG_IPV6_SIT_6RD |
| 112 | struct ip_tunnel_6rd_parm ip6rd; |
| 113 | #endif |
| 114 | struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */ |
| 115 | unsigned int prl_count; /* # of entries in PRL */ |
| 116 | int ip_tnl_net_id; |
| 117 | struct gro_cells gro_cells; |
Pravin B Shelar | 2e15ea3 | 2015-08-07 23:51:42 -0700 | [diff] [blame] | 118 | bool collect_md; |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 119 | }; |
| 120 | |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame] | 121 | #define TUNNEL_CSUM __cpu_to_be16(0x01) |
| 122 | #define TUNNEL_ROUTING __cpu_to_be16(0x02) |
| 123 | #define TUNNEL_KEY __cpu_to_be16(0x04) |
| 124 | #define TUNNEL_SEQ __cpu_to_be16(0x08) |
| 125 | #define TUNNEL_STRICT __cpu_to_be16(0x10) |
| 126 | #define TUNNEL_REC __cpu_to_be16(0x20) |
| 127 | #define TUNNEL_VERSION __cpu_to_be16(0x40) |
| 128 | #define TUNNEL_NO_KEY __cpu_to_be16(0x80) |
Pravin B Shelar | 9a62822 | 2013-06-17 17:50:07 -0700 | [diff] [blame] | 129 | #define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100) |
Jesse Gross | f579668 | 2014-10-03 15:35:33 -0700 | [diff] [blame] | 130 | #define TUNNEL_OAM __cpu_to_be16(0x0200) |
| 131 | #define TUNNEL_CRIT_OPT __cpu_to_be16(0x0400) |
Thomas Graf | 1dd144c | 2015-01-15 03:53:59 +0100 | [diff] [blame] | 132 | #define TUNNEL_GENEVE_OPT __cpu_to_be16(0x0800) |
| 133 | #define TUNNEL_VXLAN_OPT __cpu_to_be16(0x1000) |
| 134 | |
| 135 | #define TUNNEL_OPTIONS_PRESENT (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT) |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 136 | |
| 137 | struct tnl_ptk_info { |
| 138 | __be16 flags; |
| 139 | __be16 proto; |
| 140 | __be32 key; |
| 141 | __be32 seq; |
| 142 | }; |
| 143 | |
| 144 | #define PACKET_RCVD 0 |
| 145 | #define PACKET_REJECT 1 |
| 146 | |
stephen hemminger | 6261d98 | 2013-08-05 22:51:37 -0700 | [diff] [blame] | 147 | #define IP_TNL_HASH_BITS 7 |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 148 | #define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS) |
| 149 | |
| 150 | struct ip_tunnel_net { |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 151 | struct net_device *fb_tunnel_dev; |
stephen hemminger | 6261d98 | 2013-08-05 22:51:37 -0700 | [diff] [blame] | 152 | struct hlist_head tunnels[IP_TNL_HASH_SIZE]; |
Pravin B Shelar | 2e15ea3 | 2015-08-07 23:51:42 -0700 | [diff] [blame] | 153 | struct ip_tunnel __rcu *collect_md_tun; |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 154 | }; |
| 155 | |
Tom Herbert | a8c5f90 | 2014-11-12 11:54:09 -0800 | [diff] [blame] | 156 | struct ip_tunnel_encap_ops { |
| 157 | size_t (*encap_hlen)(struct ip_tunnel_encap *e); |
| 158 | int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e, |
| 159 | u8 *protocol, struct flowi4 *fl4); |
| 160 | }; |
| 161 | |
| 162 | #define MAX_IPTUN_ENCAP_OPS 8 |
| 163 | |
| 164 | extern const struct ip_tunnel_encap_ops __rcu * |
| 165 | iptun_encaps[MAX_IPTUN_ENCAP_OPS]; |
| 166 | |
| 167 | int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op, |
| 168 | unsigned int num); |
| 169 | int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op, |
| 170 | unsigned int num); |
| 171 | |
Thomas Graf | 1d8fff9 | 2015-07-21 10:43:54 +0200 | [diff] [blame] | 172 | static inline void __ip_tunnel_info_init(struct ip_tunnel_info *tun_info, |
| 173 | __be32 saddr, __be32 daddr, |
| 174 | u8 tos, u8 ttl, |
| 175 | __be16 tp_src, __be16 tp_dst, |
| 176 | __be64 tun_id, __be16 tun_flags, |
| 177 | const void *opts, u8 opts_len) |
| 178 | { |
| 179 | tun_info->key.tun_id = tun_id; |
| 180 | tun_info->key.ipv4_src = saddr; |
| 181 | tun_info->key.ipv4_dst = daddr; |
| 182 | tun_info->key.ipv4_tos = tos; |
| 183 | tun_info->key.ipv4_ttl = ttl; |
| 184 | tun_info->key.tun_flags = tun_flags; |
| 185 | |
| 186 | /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of |
| 187 | * the upper tunnel are used. |
| 188 | * E.g: GRE over IPSEC, the tp_src and tp_port are zero. |
| 189 | */ |
| 190 | tun_info->key.tp_src = tp_src; |
| 191 | tun_info->key.tp_dst = tp_dst; |
| 192 | |
| 193 | /* Clear struct padding. */ |
| 194 | if (sizeof(tun_info->key) != IP_TUNNEL_KEY_SIZE) |
| 195 | memset((unsigned char *)&tun_info->key + IP_TUNNEL_KEY_SIZE, |
| 196 | 0, sizeof(tun_info->key) - IP_TUNNEL_KEY_SIZE); |
| 197 | |
| 198 | tun_info->options = opts; |
| 199 | tun_info->options_len = opts_len; |
| 200 | } |
| 201 | |
| 202 | static inline void ip_tunnel_info_init(struct ip_tunnel_info *tun_info, |
| 203 | const struct iphdr *iph, |
| 204 | __be16 tp_src, __be16 tp_dst, |
| 205 | __be64 tun_id, __be16 tun_flags, |
| 206 | const void *opts, u8 opts_len) |
| 207 | { |
| 208 | __ip_tunnel_info_init(tun_info, iph->saddr, iph->daddr, |
| 209 | iph->tos, iph->ttl, tp_src, tp_dst, |
| 210 | tun_id, tun_flags, opts, opts_len); |
| 211 | } |
| 212 | |
Jesse Gross | 5243b6a | 2013-06-21 16:17:11 -0700 | [diff] [blame] | 213 | #ifdef CONFIG_INET |
| 214 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 215 | int ip_tunnel_init(struct net_device *dev); |
| 216 | void ip_tunnel_uninit(struct net_device *dev); |
| 217 | void ip_tunnel_dellink(struct net_device *dev, struct list_head *head); |
Nicolas Dichtel | 1728d4f | 2015-01-15 15:11:17 +0100 | [diff] [blame] | 218 | struct net *ip_tunnel_get_link_net(const struct net_device *dev); |
Nicolas Dichtel | 1e99584 | 2015-04-02 17:07:02 +0200 | [diff] [blame] | 219 | int ip_tunnel_get_iflink(const struct net_device *dev); |
Eric Dumazet | d3b6f61 | 2013-06-07 13:26:05 -0700 | [diff] [blame] | 220 | int ip_tunnel_init_net(struct net *net, int ip_tnl_net_id, |
| 221 | struct rtnl_link_ops *ops, char *devname); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 222 | |
Nicolas Dichtel | 6c742e7 | 2013-08-13 17:51:11 +0200 | [diff] [blame] | 223 | void ip_tunnel_delete_net(struct ip_tunnel_net *itn, struct rtnl_link_ops *ops); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 224 | |
| 225 | void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, |
Nicolas Dichtel | bf3d6a8 | 2013-05-27 23:48:15 +0000 | [diff] [blame] | 226 | const struct iphdr *tnl_params, const u8 protocol); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 227 | int ip_tunnel_ioctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd); |
Tom Herbert | 5632848 | 2014-09-17 12:25:58 -0700 | [diff] [blame] | 228 | int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t, |
| 229 | u8 *protocol, struct flowi4 *fl4); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 230 | int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu); |
| 231 | |
| 232 | struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev, |
| 233 | struct rtnl_link_stats64 *tot); |
| 234 | struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn, |
| 235 | int link, __be16 flags, |
| 236 | __be32 remote, __be32 local, |
| 237 | __be32 key); |
| 238 | |
| 239 | int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, |
Pravin B Shelar | 2e15ea3 | 2015-08-07 23:51:42 -0700 | [diff] [blame] | 240 | const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, |
| 241 | bool log_ecn_error); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 242 | int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[], |
| 243 | struct ip_tunnel_parm *p); |
| 244 | int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[], |
| 245 | struct ip_tunnel_parm *p); |
| 246 | void ip_tunnel_setup(struct net_device *dev, int net_id); |
Nicolas Dichtel | cf71d2bc | 2014-02-20 10:19:31 +0100 | [diff] [blame] | 247 | void ip_tunnel_dst_reset_all(struct ip_tunnel *t); |
Tom Herbert | 5632848 | 2014-09-17 12:25:58 -0700 | [diff] [blame] | 248 | int ip_tunnel_encap_setup(struct ip_tunnel *t, |
| 249 | struct ip_tunnel_encap *ipencap); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 250 | |
| 251 | /* Extract dsfield from inner protocol */ |
| 252 | static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph, |
| 253 | const struct sk_buff *skb) |
| 254 | { |
| 255 | if (skb->protocol == htons(ETH_P_IP)) |
| 256 | return iph->tos; |
| 257 | else if (skb->protocol == htons(ETH_P_IPV6)) |
| 258 | return ipv6_get_dsfield((const struct ipv6hdr *)iph); |
| 259 | else |
| 260 | return 0; |
| 261 | } |
| 262 | |
| 263 | /* Propogate ECN bits out */ |
| 264 | static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph, |
| 265 | const struct sk_buff *skb) |
| 266 | { |
| 267 | u8 inner = ip_tunnel_get_dsfield(iph, skb); |
| 268 | |
| 269 | return INET_ECN_encapsulate(tos, inner); |
| 270 | } |
| 271 | |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 272 | int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto); |
Eric Dumazet | aad8872 | 2014-04-15 13:47:15 -0400 | [diff] [blame] | 273 | int iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, |
Jiri Benc | 6b8847c | 2015-08-20 13:56:21 +0200 | [diff] [blame] | 274 | __be32 src, __be32 dst, u8 proto, |
| 275 | u8 tos, u8 ttl, __be16 df, bool xnet); |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 276 | |
Eric Dumazet | 2d26f0a | 2013-10-19 11:42:55 -0700 | [diff] [blame] | 277 | struct sk_buff *iptunnel_handle_offloads(struct sk_buff *skb, bool gre_csum, |
| 278 | int gso_type_mask); |
| 279 | |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 280 | static inline void iptunnel_xmit_stats(int err, |
| 281 | struct net_device_stats *err_stats, |
Li RongQing | 8f84985 | 2014-01-04 13:57:59 +0800 | [diff] [blame] | 282 | struct pcpu_sw_netstats __percpu *stats) |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 283 | { |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 284 | if (err > 0) { |
Li RongQing | 8f84985 | 2014-01-04 13:57:59 +0800 | [diff] [blame] | 285 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(stats); |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 286 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 287 | u64_stats_update_begin(&tstats->syncp); |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 288 | tstats->tx_bytes += err; |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 289 | tstats->tx_packets++; |
| 290 | u64_stats_update_end(&tstats->syncp); |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 291 | } else if (err < 0) { |
| 292 | err_stats->tx_errors++; |
| 293 | err_stats->tx_aborted_errors++; |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 294 | } else { |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 295 | err_stats->tx_dropped++; |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 296 | } |
| 297 | } |
Jesse Gross | 5243b6a | 2013-06-21 16:17:11 -0700 | [diff] [blame] | 298 | |
Thomas Graf | ee122c7 | 2015-07-21 10:43:58 +0200 | [diff] [blame] | 299 | static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info, size_t n) |
| 300 | { |
| 301 | return info + 1; |
| 302 | } |
| 303 | |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 304 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) |
| 305 | { |
| 306 | return (struct ip_tunnel_info *)lwtstate->data; |
| 307 | } |
| 308 | |
Thomas Graf | e703087 | 2015-07-21 10:44:01 +0200 | [diff] [blame] | 309 | extern struct static_key ip_tunnel_metadata_cnt; |
| 310 | |
| 311 | /* Returns > 0 if metadata should be collected */ |
| 312 | static inline int ip_tunnel_collect_metadata(void) |
| 313 | { |
| 314 | return static_key_false(&ip_tunnel_metadata_cnt); |
| 315 | } |
| 316 | |
Thomas Graf | 045a0fa | 2015-07-23 10:08:44 +0200 | [diff] [blame] | 317 | void __init ip_tunnel_core_init(void); |
| 318 | |
Thomas Graf | e703087 | 2015-07-21 10:44:01 +0200 | [diff] [blame] | 319 | void ip_tunnel_need_metadata(void); |
| 320 | void ip_tunnel_unneed_metadata(void); |
| 321 | |
Thomas Graf | 0528318 | 2015-07-22 14:43:58 +0200 | [diff] [blame] | 322 | #else /* CONFIG_INET */ |
| 323 | |
| 324 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) |
| 325 | { |
| 326 | return NULL; |
| 327 | } |
| 328 | |
| 329 | static inline void ip_tunnel_need_metadata(void) |
| 330 | { |
| 331 | } |
| 332 | |
| 333 | static inline void ip_tunnel_unneed_metadata(void) |
| 334 | { |
| 335 | } |
| 336 | |
Jesse Gross | 5243b6a | 2013-06-21 16:17:11 -0700 | [diff] [blame] | 337 | #endif /* CONFIG_INET */ |
| 338 | |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 339 | #endif /* __NET_IP_TUNNELS_H */ |