1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
2c5441932SPravin B Shelar #ifndef __NET_IP_TUNNELS_H
3c5441932SPravin B Shelar #define __NET_IP_TUNNELS_H 1
4c5441932SPravin B Shelar
5c5441932SPravin B Shelar #include <linux/if_tunnel.h>
6c5441932SPravin B Shelar #include <linux/netdevice.h>
7c5441932SPravin B Shelar #include <linux/skbuff.h>
87f9562a1SJiri Benc #include <linux/socket.h>
9c5441932SPravin B Shelar #include <linux/types.h>
10c5441932SPravin B Shelar #include <linux/u64_stats_sync.h>
11fca5fdf6SDaniel Borkmann #include <linux/bitops.h>
12fca5fdf6SDaniel Borkmann
13c5441932SPravin B Shelar #include <net/dsfield.h>
14c5441932SPravin B Shelar #include <net/gro_cells.h>
15c5441932SPravin B Shelar #include <net/inet_ecn.h>
1656328486STom Herbert #include <net/netns/generic.h>
17c5441932SPravin B Shelar #include <net/rtnetlink.h>
183093fbe7SThomas Graf #include <net/lwtunnel.h>
19e09acddfSPaolo Abeni #include <net/dst_cache.h>
20c5441932SPravin B Shelar
21c5441932SPravin B Shelar #if IS_ENABLED(CONFIG_IPV6)
22c5441932SPravin B Shelar #include <net/ipv6.h>
23c5441932SPravin B Shelar #include <net/ip6_fib.h>
24c5441932SPravin B Shelar #include <net/ip6_route.h>
25c5441932SPravin B Shelar #endif
26c5441932SPravin B Shelar
27c5441932SPravin B Shelar /* Keep error state on tunnel for 30 sec */
28c5441932SPravin B Shelar #define IPTUNNEL_ERR_TIMEO (30*HZ)
29c5441932SPravin B Shelar
301d8fff90SThomas Graf /* Used to memset ip_tunnel padding. */
31376534a3SJiri Benc #define IP_TUNNEL_KEY_SIZE offsetofend(struct ip_tunnel_key, tp_dst)
321d8fff90SThomas Graf
33c1ea5d67SJiri Benc /* Used to memset ipv4 address padding. */
34c1ea5d67SJiri Benc #define IP_TUNNEL_KEY_IPV4_PAD offsetofend(struct ip_tunnel_key, u.ipv4.dst)
35c1ea5d67SJiri Benc #define IP_TUNNEL_KEY_IPV4_PAD_LEN \
36c593642cSPankaj Bharadiya (sizeof_field(struct ip_tunnel_key, u) - \
37c593642cSPankaj Bharadiya sizeof_field(struct ip_tunnel_key, u.ipv4))
38c1ea5d67SJiri Benc
395832c4a7SAlexander Lobakin #define __ipt_flag_op(op, ...) \
405832c4a7SAlexander Lobakin op(__VA_ARGS__, __IP_TUNNEL_FLAG_NUM)
415832c4a7SAlexander Lobakin
425832c4a7SAlexander Lobakin #define IP_TUNNEL_DECLARE_FLAGS(...) \
435832c4a7SAlexander Lobakin __ipt_flag_op(DECLARE_BITMAP, __VA_ARGS__)
445832c4a7SAlexander Lobakin
455832c4a7SAlexander Lobakin #define ip_tunnel_flags_zero(...) __ipt_flag_op(bitmap_zero, __VA_ARGS__)
465832c4a7SAlexander Lobakin #define ip_tunnel_flags_copy(...) __ipt_flag_op(bitmap_copy, __VA_ARGS__)
475832c4a7SAlexander Lobakin #define ip_tunnel_flags_and(...) __ipt_flag_op(bitmap_and, __VA_ARGS__)
485832c4a7SAlexander Lobakin #define ip_tunnel_flags_or(...) __ipt_flag_op(bitmap_or, __VA_ARGS__)
495832c4a7SAlexander Lobakin
505832c4a7SAlexander Lobakin #define ip_tunnel_flags_empty(...) \
515832c4a7SAlexander Lobakin __ipt_flag_op(bitmap_empty, __VA_ARGS__)
525832c4a7SAlexander Lobakin #define ip_tunnel_flags_intersect(...) \
535832c4a7SAlexander Lobakin __ipt_flag_op(bitmap_intersects, __VA_ARGS__)
545832c4a7SAlexander Lobakin #define ip_tunnel_flags_subset(...) \
555832c4a7SAlexander Lobakin __ipt_flag_op(bitmap_subset, __VA_ARGS__)
565832c4a7SAlexander Lobakin
571d8fff90SThomas Graf struct ip_tunnel_key {
581d8fff90SThomas Graf __be64 tun_id;
59c1ea5d67SJiri Benc union {
60c1ea5d67SJiri Benc struct {
61c1ea5d67SJiri Benc __be32 src;
62c1ea5d67SJiri Benc __be32 dst;
63c1ea5d67SJiri Benc } ipv4;
64c1ea5d67SJiri Benc struct {
65c1ea5d67SJiri Benc struct in6_addr src;
66c1ea5d67SJiri Benc struct in6_addr dst;
67c1ea5d67SJiri Benc } ipv6;
68c1ea5d67SJiri Benc } u;
695832c4a7SAlexander Lobakin IP_TUNNEL_DECLARE_FLAGS(tun_flags);
7013461144SDaniel Borkmann __be32 label; /* Flow Label for IPv6 */
718bb5e825SIdo Schimmel u32 nhid;
725832c4a7SAlexander Lobakin u8 tos; /* TOS for IPv4, TC for IPv6 */
735832c4a7SAlexander Lobakin u8 ttl; /* TTL for IPv4, HL for IPv6 */
741d8fff90SThomas Graf __be16 tp_src;
751d8fff90SThomas Graf __be16 tp_dst;
76451ef36bSPaul Chaignon __u8 flow_flags;
77ac1cf399SJiri Benc };
781d8fff90SThomas Graf
79ac931d4cSChristian Ehrig struct ip_tunnel_encap {
80ac931d4cSChristian Ehrig u16 type;
81ac931d4cSChristian Ehrig u16 flags;
82ac931d4cSChristian Ehrig __be16 sport;
83ac931d4cSChristian Ehrig __be16 dport;
84ac931d4cSChristian Ehrig };
85ac931d4cSChristian Ehrig
8646fa062aSJiri Benc /* Flags for ip_tunnel_info mode. */
8746fa062aSJiri Benc #define IP_TUNNEL_INFO_TX 0x01 /* represents tx tunnel parameters */
887f9562a1SJiri Benc #define IP_TUNNEL_INFO_IPV6 0x02 /* key contains IPv6 addresses */
89f35581d6SRoopa Prabhu #define IP_TUNNEL_INFO_BRIDGE 0x04 /* represents a bridged tunnel id */
90ee122c79SThomas Graf
91fca5fdf6SDaniel Borkmann /* Maximum tunnel options length. */
92fca5fdf6SDaniel Borkmann #define IP_TUNNEL_OPTS_MAX \
93c593642cSPankaj Bharadiya GENMASK((sizeof_field(struct ip_tunnel_info, \
94fca5fdf6SDaniel Borkmann options_len) * BITS_PER_BYTE) - 1, 0)
95fca5fdf6SDaniel Borkmann
96bc9d003dSGavin Li #define ip_tunnel_info_opts(info) \
97bc9d003dSGavin Li _Generic(info, \
98bc9d003dSGavin Li const struct ip_tunnel_info * : ((const void *)((info) + 1)),\
99bc9d003dSGavin Li struct ip_tunnel_info * : ((void *)((info) + 1))\
100bc9d003dSGavin Li )
101bc9d003dSGavin Li
1021d8fff90SThomas Graf struct ip_tunnel_info {
1031d8fff90SThomas Graf struct ip_tunnel_key key;
104ac931d4cSChristian Ehrig struct ip_tunnel_encap encap;
105d71785ffSPaolo Abeni #ifdef CONFIG_DST_CACHE
106d71785ffSPaolo Abeni struct dst_cache dst_cache;
107d71785ffSPaolo Abeni #endif
1081d8fff90SThomas Graf u8 options_len;
109ee122c79SThomas Graf u8 mode;
1101d8fff90SThomas Graf };
1111d8fff90SThomas Graf
112c5441932SPravin B Shelar /* 6rd prefix/relay information */
113c5441932SPravin B Shelar #ifdef CONFIG_IPV6_SIT_6RD
114c5441932SPravin B Shelar struct ip_tunnel_6rd_parm {
115c5441932SPravin B Shelar struct in6_addr prefix;
116c5441932SPravin B Shelar __be32 relay_prefix;
117c5441932SPravin B Shelar u16 prefixlen;
118c5441932SPravin B Shelar u16 relay_prefixlen;
119c5441932SPravin B Shelar };
120c5441932SPravin B Shelar #endif
121c5441932SPravin B Shelar
122c5441932SPravin B Shelar struct ip_tunnel_prl_entry {
123c5441932SPravin B Shelar struct ip_tunnel_prl_entry __rcu *next;
124c5441932SPravin B Shelar __be32 addr;
125c5441932SPravin B Shelar u16 flags;
126c5441932SPravin B Shelar struct rcu_head rcu_head;
127c5441932SPravin B Shelar };
128c5441932SPravin B Shelar
1292e15ea39SPravin B Shelar struct metadata_dst;
1302e15ea39SPravin B Shelar
1315832c4a7SAlexander Lobakin /* Kernel-side variant of ip_tunnel_parm */
132117aef12SAlexander Lobakin struct ip_tunnel_parm_kern {
133117aef12SAlexander Lobakin char name[IFNAMSIZ];
1345832c4a7SAlexander Lobakin IP_TUNNEL_DECLARE_FLAGS(i_flags);
1355832c4a7SAlexander Lobakin IP_TUNNEL_DECLARE_FLAGS(o_flags);
136117aef12SAlexander Lobakin __be32 i_key;
137117aef12SAlexander Lobakin __be32 o_key;
1385832c4a7SAlexander Lobakin int link;
139117aef12SAlexander Lobakin struct iphdr iph;
140117aef12SAlexander Lobakin };
141117aef12SAlexander Lobakin
142c5441932SPravin B Shelar struct ip_tunnel {
143c5441932SPravin B Shelar struct ip_tunnel __rcu *next;
144c5441932SPravin B Shelar struct hlist_node hash_node;
145c0fd407aSEric Dumazet
146c5441932SPravin B Shelar struct net_device *dev;
147c0fd407aSEric Dumazet netdevice_tracker dev_tracker;
148c0fd407aSEric Dumazet
1495e6700b3SNicolas Dichtel struct net *net; /* netns for packet i/o */
150c5441932SPravin B Shelar
151c5441932SPravin B Shelar unsigned long err_time; /* Time when the last ICMP error
152c5441932SPravin B Shelar * arrived */
153f38ba953Sstephen hemminger int err_count; /* Number of arrived ICMP errors */
154c5441932SPravin B Shelar
155c5441932SPravin B Shelar /* These four fields used only by GRE */
1566b8847c5SJiri Benc u32 i_seqno; /* The last seen seqno */
15731c417c9SPeilin Ye atomic_t o_seqno; /* The last output seqno */
15856328486STom Herbert int tun_hlen; /* Precalculated header length */
159c5441932SPravin B Shelar
160f551c91dSWilliam Tu /* These four fields used only by ERSPAN */
16184e54fe0SWilliam Tu u32 index; /* ERSPAN type II index */
162f551c91dSWilliam Tu u8 erspan_ver; /* ERSPAN version */
163f551c91dSWilliam Tu u8 dir; /* ERSPAN direction */
164f551c91dSWilliam Tu u16 hwid; /* ERSPAN hardware ID */
16584e54fe0SWilliam Tu
166e09acddfSPaolo Abeni struct dst_cache dst_cache;
1677d442fabSTom Herbert
168117aef12SAlexander Lobakin struct ip_tunnel_parm_kern parms;
169c5441932SPravin B Shelar
170f38ba953Sstephen hemminger int mlink;
17156328486STom Herbert int encap_hlen; /* Encap header length (FOU,GUE) */
17256328486STom Herbert int hlen; /* tun_hlen + encap_hlen */
173f38ba953Sstephen hemminger struct ip_tunnel_encap encap;
17456328486STom Herbert
175c5441932SPravin B Shelar /* for SIT */
176c5441932SPravin B Shelar #ifdef CONFIG_IPV6_SIT_6RD
177c5441932SPravin B Shelar struct ip_tunnel_6rd_parm ip6rd;
178c5441932SPravin B Shelar #endif
179c5441932SPravin B Shelar struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */
180c5441932SPravin B Shelar unsigned int prl_count; /* # of entries in PRL */
181c7d03a00SAlexey Dobriyan unsigned int ip_tnl_net_id;
182c5441932SPravin B Shelar struct gro_cells gro_cells;
1839830ad4cSCraig Gallek __u32 fwmark;
1842e15ea39SPravin B Shelar bool collect_md;
18522a59be8SPhilip Prindeville bool ignore_df;
186c5441932SPravin B Shelar };
187c5441932SPravin B Shelar
188c5441932SPravin B Shelar struct tnl_ptk_info {
1895832c4a7SAlexander Lobakin IP_TUNNEL_DECLARE_FLAGS(flags);
190c5441932SPravin B Shelar __be16 proto;
191c5441932SPravin B Shelar __be32 key;
192c5441932SPravin B Shelar __be32 seq;
1939b8c6d7bSEric Dumazet int hdr_len;
194c5441932SPravin B Shelar };
195c5441932SPravin B Shelar
196c5441932SPravin B Shelar #define PACKET_RCVD 0
197c5441932SPravin B Shelar #define PACKET_REJECT 1
198125372faSJiri Benc #define PACKET_NEXT 2
199c5441932SPravin B Shelar
2006261d983Sstephen hemminger #define IP_TNL_HASH_BITS 7
201c5441932SPravin B Shelar #define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS)
202c5441932SPravin B Shelar
203c5441932SPravin B Shelar struct ip_tunnel_net {
204c5441932SPravin B Shelar struct net_device *fb_tunnel_dev;
20579134e6cSEric Dumazet struct rtnl_link_ops *rtnl_link_ops;
2066261d983Sstephen hemminger struct hlist_head tunnels[IP_TNL_HASH_SIZE];
2072e15ea39SPravin B Shelar struct ip_tunnel __rcu *collect_md_tun;
20879134e6cSEric Dumazet int type;
209c5441932SPravin B Shelar };
210c5441932SPravin B Shelar
ip_tunnel_set_options_present(unsigned long * flags)2115832c4a7SAlexander Lobakin static inline void ip_tunnel_set_options_present(unsigned long *flags)
2125832c4a7SAlexander Lobakin {
2135832c4a7SAlexander Lobakin IP_TUNNEL_DECLARE_FLAGS(present) = { };
2145832c4a7SAlexander Lobakin
2155832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_GENEVE_OPT_BIT, present);
2165832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_VXLAN_OPT_BIT, present);
2175832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_ERSPAN_OPT_BIT, present);
2185832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_GTP_OPT_BIT, present);
2196dd514f4SMichal Swiatkowski __set_bit(IP_TUNNEL_PFCP_OPT_BIT, present);
2205832c4a7SAlexander Lobakin
2215832c4a7SAlexander Lobakin ip_tunnel_flags_or(flags, flags, present);
2225832c4a7SAlexander Lobakin }
2235832c4a7SAlexander Lobakin
ip_tunnel_clear_options_present(unsigned long * flags)2245832c4a7SAlexander Lobakin static inline void ip_tunnel_clear_options_present(unsigned long *flags)
2255832c4a7SAlexander Lobakin {
2265832c4a7SAlexander Lobakin IP_TUNNEL_DECLARE_FLAGS(present) = { };
2275832c4a7SAlexander Lobakin
2285832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_GENEVE_OPT_BIT, present);
2295832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_VXLAN_OPT_BIT, present);
2305832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_ERSPAN_OPT_BIT, present);
2315832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_GTP_OPT_BIT, present);
2326dd514f4SMichal Swiatkowski __set_bit(IP_TUNNEL_PFCP_OPT_BIT, present);
2335832c4a7SAlexander Lobakin
2345832c4a7SAlexander Lobakin __ipt_flag_op(bitmap_andnot, flags, flags, present);
2355832c4a7SAlexander Lobakin }
2365832c4a7SAlexander Lobakin
ip_tunnel_is_options_present(const unsigned long * flags)2375832c4a7SAlexander Lobakin static inline bool ip_tunnel_is_options_present(const unsigned long *flags)
2385832c4a7SAlexander Lobakin {
2395832c4a7SAlexander Lobakin IP_TUNNEL_DECLARE_FLAGS(present) = { };
2405832c4a7SAlexander Lobakin
2415832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_GENEVE_OPT_BIT, present);
2425832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_VXLAN_OPT_BIT, present);
2435832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_ERSPAN_OPT_BIT, present);
2445832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_GTP_OPT_BIT, present);
2456dd514f4SMichal Swiatkowski __set_bit(IP_TUNNEL_PFCP_OPT_BIT, present);
2465832c4a7SAlexander Lobakin
2475832c4a7SAlexander Lobakin return ip_tunnel_flags_intersect(flags, present);
2485832c4a7SAlexander Lobakin }
2495832c4a7SAlexander Lobakin
ip_tunnel_flags_is_be16_compat(const unsigned long * flags)2505832c4a7SAlexander Lobakin static inline bool ip_tunnel_flags_is_be16_compat(const unsigned long *flags)
2515832c4a7SAlexander Lobakin {
2525832c4a7SAlexander Lobakin IP_TUNNEL_DECLARE_FLAGS(supp) = { };
2535832c4a7SAlexander Lobakin
2545832c4a7SAlexander Lobakin bitmap_set(supp, 0, BITS_PER_TYPE(__be16));
2555832c4a7SAlexander Lobakin __set_bit(IP_TUNNEL_VTI_BIT, supp);
2565832c4a7SAlexander Lobakin
2575832c4a7SAlexander Lobakin return ip_tunnel_flags_subset(flags, supp);
2585832c4a7SAlexander Lobakin }
2595832c4a7SAlexander Lobakin
ip_tunnel_flags_from_be16(unsigned long * dst,__be16 flags)2605832c4a7SAlexander Lobakin static inline void ip_tunnel_flags_from_be16(unsigned long *dst, __be16 flags)
2615832c4a7SAlexander Lobakin {
2625832c4a7SAlexander Lobakin ip_tunnel_flags_zero(dst);
2635832c4a7SAlexander Lobakin
2645832c4a7SAlexander Lobakin bitmap_write(dst, be16_to_cpu(flags), 0, BITS_PER_TYPE(__be16));
2655832c4a7SAlexander Lobakin __assign_bit(IP_TUNNEL_VTI_BIT, dst, flags & VTI_ISVTI);
2665832c4a7SAlexander Lobakin }
2675832c4a7SAlexander Lobakin
ip_tunnel_flags_to_be16(const unsigned long * flags)2685832c4a7SAlexander Lobakin static inline __be16 ip_tunnel_flags_to_be16(const unsigned long *flags)
2695832c4a7SAlexander Lobakin {
2705832c4a7SAlexander Lobakin __be16 ret;
2715832c4a7SAlexander Lobakin
2725832c4a7SAlexander Lobakin ret = cpu_to_be16(bitmap_read(flags, 0, BITS_PER_TYPE(__be16)));
2735832c4a7SAlexander Lobakin if (test_bit(IP_TUNNEL_VTI_BIT, flags))
2745832c4a7SAlexander Lobakin ret |= VTI_ISVTI;
2755832c4a7SAlexander Lobakin
2765832c4a7SAlexander Lobakin return ret;
2775832c4a7SAlexander Lobakin }
2785832c4a7SAlexander Lobakin
ip_tunnel_key_init(struct ip_tunnel_key * key,__be32 saddr,__be32 daddr,u8 tos,u8 ttl,__be32 label,__be16 tp_src,__be16 tp_dst,__be64 tun_id,const unsigned long * tun_flags)2794c222798SPravin B Shelar static inline void ip_tunnel_key_init(struct ip_tunnel_key *key,
2801d8fff90SThomas Graf __be32 saddr, __be32 daddr,
28113461144SDaniel Borkmann u8 tos, u8 ttl, __be32 label,
2821d8fff90SThomas Graf __be16 tp_src, __be16 tp_dst,
2835832c4a7SAlexander Lobakin __be64 tun_id,
2845832c4a7SAlexander Lobakin const unsigned long *tun_flags)
2851d8fff90SThomas Graf {
2864c222798SPravin B Shelar key->tun_id = tun_id;
2874c222798SPravin B Shelar key->u.ipv4.src = saddr;
2884c222798SPravin B Shelar key->u.ipv4.dst = daddr;
2894c222798SPravin B Shelar memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD,
290c1ea5d67SJiri Benc 0, IP_TUNNEL_KEY_IPV4_PAD_LEN);
2914c222798SPravin B Shelar key->tos = tos;
2924c222798SPravin B Shelar key->ttl = ttl;
29313461144SDaniel Borkmann key->label = label;
2945832c4a7SAlexander Lobakin ip_tunnel_flags_copy(key->tun_flags, tun_flags);
2951d8fff90SThomas Graf
2961d8fff90SThomas Graf /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of
2971d8fff90SThomas Graf * the upper tunnel are used.
2981d8fff90SThomas Graf * E.g: GRE over IPSEC, the tp_src and tp_port are zero.
2991d8fff90SThomas Graf */
3004c222798SPravin B Shelar key->tp_src = tp_src;
3014c222798SPravin B Shelar key->tp_dst = tp_dst;
3021d8fff90SThomas Graf
3031d8fff90SThomas Graf /* Clear struct padding. */
3044c222798SPravin B Shelar if (sizeof(*key) != IP_TUNNEL_KEY_SIZE)
3054c222798SPravin B Shelar memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE,
3064c222798SPravin B Shelar 0, sizeof(*key) - IP_TUNNEL_KEY_SIZE);
3071d8fff90SThomas Graf }
3081d8fff90SThomas Graf
309db3c6139SDaniel Borkmann static inline bool
ip_tunnel_dst_cache_usable(const struct sk_buff * skb,const struct ip_tunnel_info * info)310db3c6139SDaniel Borkmann ip_tunnel_dst_cache_usable(const struct sk_buff *skb,
311db3c6139SDaniel Borkmann const struct ip_tunnel_info *info)
312db3c6139SDaniel Borkmann {
313db3c6139SDaniel Borkmann if (skb->mark)
314db3c6139SDaniel Borkmann return false;
315db3c6139SDaniel Borkmann
3165832c4a7SAlexander Lobakin return !info || !test_bit(IP_TUNNEL_NOCACHE_BIT, info->key.tun_flags);
317db3c6139SDaniel Borkmann }
318db3c6139SDaniel Borkmann
ip_tunnel_info_af(const struct ip_tunnel_info * tun_info)3197f9562a1SJiri Benc static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info
3207f9562a1SJiri Benc *tun_info)
3217f9562a1SJiri Benc {
3227f9562a1SJiri Benc return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET;
3237f9562a1SJiri Benc }
3247f9562a1SJiri Benc
key32_to_tunnel_id(__be32 key)325d817f432SAmir Vadai static inline __be64 key32_to_tunnel_id(__be32 key)
326d817f432SAmir Vadai {
327d817f432SAmir Vadai #ifdef __BIG_ENDIAN
328d817f432SAmir Vadai return (__force __be64)key;
329d817f432SAmir Vadai #else
330d817f432SAmir Vadai return (__force __be64)((__force u64)key << 32);
331d817f432SAmir Vadai #endif
332d817f432SAmir Vadai }
333d817f432SAmir Vadai
334d817f432SAmir Vadai /* Returns the least-significant 32 bits of a __be64. */
tunnel_id_to_key32(__be64 tun_id)335d817f432SAmir Vadai static inline __be32 tunnel_id_to_key32(__be64 tun_id)
336d817f432SAmir Vadai {
337d817f432SAmir Vadai #ifdef __BIG_ENDIAN
338d817f432SAmir Vadai return (__force __be32)tun_id;
339d817f432SAmir Vadai #else
340d817f432SAmir Vadai return (__force __be32)((__force u64)tun_id >> 32);
341d817f432SAmir Vadai #endif
342d817f432SAmir Vadai }
343d817f432SAmir Vadai
3445243b6acSJesse Gross #ifdef CONFIG_INET
3455243b6acSJesse Gross
ip_tunnel_init_flow(struct flowi4 * fl4,int proto,__be32 daddr,__be32 saddr,__be32 key,__u8 tos,struct net * net,int oif,__u32 mark,__u32 tun_inner_hash,__u8 flow_flags)346b0066da5SPetr Machata static inline void ip_tunnel_init_flow(struct flowi4 *fl4,
347b0066da5SPetr Machata int proto,
348b0066da5SPetr Machata __be32 daddr, __be32 saddr,
349db53cd3dSDavid Ahern __be32 key, __u8 tos,
350db53cd3dSDavid Ahern struct net *net, int oif,
3517ec9fce4SEyal Birger __u32 mark, __u32 tun_inner_hash,
3527ec9fce4SEyal Birger __u8 flow_flags)
353b0066da5SPetr Machata {
354b0066da5SPetr Machata memset(fl4, 0, sizeof(*fl4));
355db53cd3dSDavid Ahern
356db53cd3dSDavid Ahern if (oif) {
357db53cd3dSDavid Ahern fl4->flowi4_l3mdev = l3mdev_master_upper_ifindex_by_index_rcu(net, oif);
358db53cd3dSDavid Ahern /* Legacy VRF/l3mdev use case */
359db53cd3dSDavid Ahern fl4->flowi4_oif = fl4->flowi4_l3mdev ? 0 : oif;
360db53cd3dSDavid Ahern }
361db53cd3dSDavid Ahern
362b0066da5SPetr Machata fl4->daddr = daddr;
363b0066da5SPetr Machata fl4->saddr = saddr;
364b0066da5SPetr Machata fl4->flowi4_tos = tos;
365b0066da5SPetr Machata fl4->flowi4_proto = proto;
366b0066da5SPetr Machata fl4->fl4_gre_key = key;
367b0066da5SPetr Machata fl4->flowi4_mark = mark;
36824ba1440Swenxu fl4->flowi4_multipath_hash = tun_inner_hash;
3697ec9fce4SEyal Birger fl4->flowi4_flags = flow_flags;
370b0066da5SPetr Machata }
371b0066da5SPetr Machata
372c5441932SPravin B Shelar int ip_tunnel_init(struct net_device *dev);
373c5441932SPravin B Shelar void ip_tunnel_uninit(struct net_device *dev);
374c5441932SPravin B Shelar void ip_tunnel_dellink(struct net_device *dev, struct list_head *head);
3751728d4faSNicolas Dichtel struct net *ip_tunnel_get_link_net(const struct net_device *dev);
3761e99584bSNicolas Dichtel int ip_tunnel_get_iflink(const struct net_device *dev);
377c7d03a00SAlexey Dobriyan int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id,
378c5441932SPravin B Shelar struct rtnl_link_ops *ops, char *devname);
379c5441932SPravin B Shelar
38064bc1781SEric Dumazet void ip_tunnel_delete_nets(struct list_head *list_net, unsigned int id,
3819b5b3637SEric Dumazet struct rtnl_link_ops *ops,
3829b5b3637SEric Dumazet struct list_head *dev_to_kill);
383c5441932SPravin B Shelar
384c5441932SPravin B Shelar void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
385bf3d6a8fSNicolas Dichtel const struct iphdr *tnl_params, const u8 protocol);
386cfc7381bSAlexei Starovoitov void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
387c8b34e68Swenxu const u8 proto, int tunnel_hlen);
388117aef12SAlexander Lobakin int ip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm_kern *p,
389117aef12SAlexander Lobakin int cmd);
390117aef12SAlexander Lobakin bool ip_tunnel_parm_from_user(struct ip_tunnel_parm_kern *kp,
391117aef12SAlexander Lobakin const void __user *data);
392117aef12SAlexander Lobakin bool ip_tunnel_parm_to_user(void __user *data, struct ip_tunnel_parm_kern *kp);
3933e7a1c7cSArnd Bergmann int ip_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
3943e7a1c7cSArnd Bergmann void __user *data, int cmd);
3957e059158SDavid Wragg int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict);
396c5441932SPravin B Shelar int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu);
397c5441932SPravin B Shelar
398c5441932SPravin B Shelar struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn,
3995832c4a7SAlexander Lobakin int link, const unsigned long *flags,
400c5441932SPravin B Shelar __be32 remote, __be32 local,
401c5441932SPravin B Shelar __be32 key);
402c5441932SPravin B Shelar
403ac931d4cSChristian Ehrig void ip_tunnel_md_udp_encap(struct sk_buff *skb, struct ip_tunnel_info *info);
404c5441932SPravin B Shelar int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
4052e15ea39SPravin B Shelar const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst,
4062e15ea39SPravin B Shelar bool log_ecn_error);
407c5441932SPravin B Shelar int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[],
408117aef12SAlexander Lobakin struct ip_tunnel_parm_kern *p, __u32 fwmark);
409c5441932SPravin B Shelar int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[],
410117aef12SAlexander Lobakin struct ip_tunnel_parm_kern *p, __u32 fwmark);
411c7d03a00SAlexey Dobriyan void ip_tunnel_setup(struct net_device *dev, unsigned int net_id);
41255c2bc14STom Herbert
413537dd2d9SLiu Jian bool ip_tunnel_netlink_encap_parms(struct nlattr *data[],
414537dd2d9SLiu Jian struct ip_tunnel_encap *encap);
415537dd2d9SLiu Jian
416b86fca80SLiu Jian void ip_tunnel_netlink_parms(struct nlattr *data[],
417117aef12SAlexander Lobakin struct ip_tunnel_parm_kern *parms);
418b86fca80SLiu Jian
4192606aff9SJason A. Donenfeld extern const struct header_ops ip_tunnel_header_ops;
4202606aff9SJason A. Donenfeld __be16 ip_tunnel_parse_protocol(const struct sk_buff *skb);
4212606aff9SJason A. Donenfeld
42255c2bc14STom Herbert struct ip_tunnel_encap_ops {
42355c2bc14STom Herbert size_t (*encap_hlen)(struct ip_tunnel_encap *e);
42455c2bc14STom Herbert int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e,
42555c2bc14STom Herbert u8 *protocol, struct flowi4 *fl4);
426e7cc0824SStefano Brivio int (*err_handler)(struct sk_buff *skb, u32 info);
42755c2bc14STom Herbert };
42855c2bc14STom Herbert
42955c2bc14STom Herbert #define MAX_IPTUN_ENCAP_OPS 8
43055c2bc14STom Herbert
43155c2bc14STom Herbert extern const struct ip_tunnel_encap_ops __rcu *
43255c2bc14STom Herbert iptun_encaps[MAX_IPTUN_ENCAP_OPS];
43355c2bc14STom Herbert
43455c2bc14STom Herbert int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op,
43555c2bc14STom Herbert unsigned int num);
43655c2bc14STom Herbert int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op,
43755c2bc14STom Herbert unsigned int num);
43855c2bc14STom Herbert
43956328486STom Herbert int ip_tunnel_encap_setup(struct ip_tunnel *t,
44056328486STom Herbert struct ip_tunnel_encap *ipencap);
441c5441932SPravin B Shelar
pskb_inet_may_pull(struct sk_buff * skb)442cb9f1b78SWillem de Bruijn static inline bool pskb_inet_may_pull(struct sk_buff *skb)
443cb9f1b78SWillem de Bruijn {
444cb9f1b78SWillem de Bruijn int nhlen;
445cb9f1b78SWillem de Bruijn
446cb9f1b78SWillem de Bruijn switch (skb->protocol) {
447cb9f1b78SWillem de Bruijn #if IS_ENABLED(CONFIG_IPV6)
448cb9f1b78SWillem de Bruijn case htons(ETH_P_IPV6):
449cb9f1b78SWillem de Bruijn nhlen = sizeof(struct ipv6hdr);
450cb9f1b78SWillem de Bruijn break;
451cb9f1b78SWillem de Bruijn #endif
452cb9f1b78SWillem de Bruijn case htons(ETH_P_IP):
453cb9f1b78SWillem de Bruijn nhlen = sizeof(struct iphdr);
454cb9f1b78SWillem de Bruijn break;
455cb9f1b78SWillem de Bruijn default:
456cb9f1b78SWillem de Bruijn nhlen = 0;
457cb9f1b78SWillem de Bruijn }
458cb9f1b78SWillem de Bruijn
459cb9f1b78SWillem de Bruijn return pskb_network_may_pull(skb, nhlen);
460cb9f1b78SWillem de Bruijn }
461cb9f1b78SWillem de Bruijn
462d8a6213dSEric Dumazet /* Variant of pskb_inet_may_pull().
463d8a6213dSEric Dumazet */
skb_vlan_inet_prepare(struct sk_buff * skb,bool inner_proto_inherit)464c6ae073fSGal Pressman static inline bool skb_vlan_inet_prepare(struct sk_buff *skb,
465c6ae073fSGal Pressman bool inner_proto_inherit)
466d8a6213dSEric Dumazet {
467c6ae073fSGal Pressman int nhlen = 0, maclen = inner_proto_inherit ? 0 : ETH_HLEN;
468d8a6213dSEric Dumazet __be16 type = skb->protocol;
469d8a6213dSEric Dumazet
470d8a6213dSEric Dumazet /* Essentially this is skb_protocol(skb, true)
471d8a6213dSEric Dumazet * And we get MAC len.
472d8a6213dSEric Dumazet */
473d8a6213dSEric Dumazet if (eth_type_vlan(type))
474d8a6213dSEric Dumazet type = __vlan_get_protocol(skb, type, &maclen);
475d8a6213dSEric Dumazet
476d8a6213dSEric Dumazet switch (type) {
477d8a6213dSEric Dumazet #if IS_ENABLED(CONFIG_IPV6)
478d8a6213dSEric Dumazet case htons(ETH_P_IPV6):
479d8a6213dSEric Dumazet nhlen = sizeof(struct ipv6hdr);
480d8a6213dSEric Dumazet break;
481d8a6213dSEric Dumazet #endif
482d8a6213dSEric Dumazet case htons(ETH_P_IP):
483d8a6213dSEric Dumazet nhlen = sizeof(struct iphdr);
484d8a6213dSEric Dumazet break;
485d8a6213dSEric Dumazet }
486d8a6213dSEric Dumazet /* For ETH_P_IPV6/ETH_P_IP we make sure to pull
487d8a6213dSEric Dumazet * a base network header in skb->head.
488d8a6213dSEric Dumazet */
489d8a6213dSEric Dumazet if (!pskb_may_pull(skb, maclen + nhlen))
490d8a6213dSEric Dumazet return false;
491d8a6213dSEric Dumazet
492d8a6213dSEric Dumazet skb_set_network_header(skb, maclen);
493d8a6213dSEric Dumazet return true;
494d8a6213dSEric Dumazet }
495d8a6213dSEric Dumazet
ip_encap_hlen(struct ip_tunnel_encap * e)49655c2bc14STom Herbert static inline int ip_encap_hlen(struct ip_tunnel_encap *e)
49755c2bc14STom Herbert {
49855c2bc14STom Herbert const struct ip_tunnel_encap_ops *ops;
49955c2bc14STom Herbert int hlen = -EINVAL;
50055c2bc14STom Herbert
50155c2bc14STom Herbert if (e->type == TUNNEL_ENCAP_NONE)
50255c2bc14STom Herbert return 0;
50355c2bc14STom Herbert
50455c2bc14STom Herbert if (e->type >= MAX_IPTUN_ENCAP_OPS)
50555c2bc14STom Herbert return -EINVAL;
50655c2bc14STom Herbert
50755c2bc14STom Herbert rcu_read_lock();
50855c2bc14STom Herbert ops = rcu_dereference(iptun_encaps[e->type]);
50955c2bc14STom Herbert if (likely(ops && ops->encap_hlen))
51055c2bc14STom Herbert hlen = ops->encap_hlen(e);
51155c2bc14STom Herbert rcu_read_unlock();
51255c2bc14STom Herbert
51355c2bc14STom Herbert return hlen;
51455c2bc14STom Herbert }
51555c2bc14STom Herbert
ip_tunnel_encap(struct sk_buff * skb,struct ip_tunnel_encap * e,u8 * protocol,struct flowi4 * fl4)516ac931d4cSChristian Ehrig static inline int ip_tunnel_encap(struct sk_buff *skb,
517ac931d4cSChristian Ehrig struct ip_tunnel_encap *e,
51855c2bc14STom Herbert u8 *protocol, struct flowi4 *fl4)
51955c2bc14STom Herbert {
52055c2bc14STom Herbert const struct ip_tunnel_encap_ops *ops;
52155c2bc14STom Herbert int ret = -EINVAL;
52255c2bc14STom Herbert
523ac931d4cSChristian Ehrig if (e->type == TUNNEL_ENCAP_NONE)
52455c2bc14STom Herbert return 0;
52555c2bc14STom Herbert
526ac931d4cSChristian Ehrig if (e->type >= MAX_IPTUN_ENCAP_OPS)
52755c2bc14STom Herbert return -EINVAL;
52855c2bc14STom Herbert
52955c2bc14STom Herbert rcu_read_lock();
530ac931d4cSChristian Ehrig ops = rcu_dereference(iptun_encaps[e->type]);
53155c2bc14STom Herbert if (likely(ops && ops->build_header))
532ac931d4cSChristian Ehrig ret = ops->build_header(skb, e, protocol, fl4);
53355c2bc14STom Herbert rcu_read_unlock();
53455c2bc14STom Herbert
53555c2bc14STom Herbert return ret;
53655c2bc14STom Herbert }
53755c2bc14STom Herbert
538c5441932SPravin B Shelar /* Extract dsfield from inner protocol */
ip_tunnel_get_dsfield(const struct iphdr * iph,const struct sk_buff * skb)539c5441932SPravin B Shelar static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph,
540c5441932SPravin B Shelar const struct sk_buff *skb)
541c5441932SPravin B Shelar {
5427074732cSMatthias May __be16 payload_protocol = skb_protocol(skb, true);
5437074732cSMatthias May
5447074732cSMatthias May if (payload_protocol == htons(ETH_P_IP))
545c5441932SPravin B Shelar return iph->tos;
5467074732cSMatthias May else if (payload_protocol == htons(ETH_P_IPV6))
547c5441932SPravin B Shelar return ipv6_get_dsfield((const struct ipv6hdr *)iph);
548c5441932SPravin B Shelar else
549c5441932SPravin B Shelar return 0;
550c5441932SPravin B Shelar }
551c5441932SPravin B Shelar
ip_tunnel_get_flowlabel(const struct iphdr * iph,const struct sk_buff * skb)552c6e9dba3SAlce Lafranque static inline __be32 ip_tunnel_get_flowlabel(const struct iphdr *iph,
553c6e9dba3SAlce Lafranque const struct sk_buff *skb)
554c6e9dba3SAlce Lafranque {
555c6e9dba3SAlce Lafranque __be16 payload_protocol = skb_protocol(skb, true);
556c6e9dba3SAlce Lafranque
557c6e9dba3SAlce Lafranque if (payload_protocol == htons(ETH_P_IPV6))
558c6e9dba3SAlce Lafranque return ip6_flowlabel((const struct ipv6hdr *)iph);
559c6e9dba3SAlce Lafranque else
560c6e9dba3SAlce Lafranque return 0;
561c6e9dba3SAlce Lafranque }
562c6e9dba3SAlce Lafranque
ip_tunnel_get_ttl(const struct iphdr * iph,const struct sk_buff * skb)56372f6d71eSHangbin Liu static inline u8 ip_tunnel_get_ttl(const struct iphdr *iph,
56472f6d71eSHangbin Liu const struct sk_buff *skb)
56572f6d71eSHangbin Liu {
5667074732cSMatthias May __be16 payload_protocol = skb_protocol(skb, true);
5677074732cSMatthias May
5687074732cSMatthias May if (payload_protocol == htons(ETH_P_IP))
56972f6d71eSHangbin Liu return iph->ttl;
5707074732cSMatthias May else if (payload_protocol == htons(ETH_P_IPV6))
57172f6d71eSHangbin Liu return ((const struct ipv6hdr *)iph)->hop_limit;
57272f6d71eSHangbin Liu else
57372f6d71eSHangbin Liu return 0;
57472f6d71eSHangbin Liu }
57572f6d71eSHangbin Liu
576*d0193b16SSimon Horman /* Propagate ECN bits out */
ip_tunnel_ecn_encap(u8 tos,const struct iphdr * iph,const struct sk_buff * skb)577c5441932SPravin B Shelar static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph,
578c5441932SPravin B Shelar const struct sk_buff *skb)
579c5441932SPravin B Shelar {
580c5441932SPravin B Shelar u8 inner = ip_tunnel_get_dsfield(iph, skb);
581c5441932SPravin B Shelar
582c5441932SPravin B Shelar return INET_ECN_encapsulate(tos, inner);
583c5441932SPravin B Shelar }
584c5441932SPravin B Shelar
585a6d5bbf3SJiri Benc int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
586a6d5bbf3SJiri Benc __be16 inner_proto, bool raw_proto, bool xnet);
587a6d5bbf3SJiri Benc
iptunnel_pull_header(struct sk_buff * skb,int hdr_len,__be16 inner_proto,bool xnet)588a6d5bbf3SJiri Benc static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
589a6d5bbf3SJiri Benc __be16 inner_proto, bool xnet)
590a6d5bbf3SJiri Benc {
591a6d5bbf3SJiri Benc return __iptunnel_pull_header(skb, hdr_len, inner_proto, false, xnet);
592a6d5bbf3SJiri Benc }
593a6d5bbf3SJiri Benc
594039f5062SPravin B Shelar void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
5956b8847c5SJiri Benc __be32 src, __be32 dst, u8 proto,
5966b8847c5SJiri Benc u8 tos, u8 ttl, __be16 df, bool xnet);
59763d008a4SJiri Benc struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md,
59863d008a4SJiri Benc gfp_t flags);
5994cb47a86SStefano Brivio int skb_tunnel_check_pmtu(struct sk_buff *skb, struct dst_entry *encap_dst,
6004cb47a86SStefano Brivio int headroom, bool reply);
6010e6fbc5bSPravin B Shelar
602aed069dfSAlexander Duyck int iptunnel_handle_offloads(struct sk_buff *skb, int gso_type_mask);
6032d26f0a3SEric Dumazet
iptunnel_pull_offloads(struct sk_buff * skb)604a09a4c8dSJesse Gross static inline int iptunnel_pull_offloads(struct sk_buff *skb)
605a09a4c8dSJesse Gross {
606a09a4c8dSJesse Gross if (skb_is_gso(skb)) {
607a09a4c8dSJesse Gross int err;
608a09a4c8dSJesse Gross
609a09a4c8dSJesse Gross err = skb_unclone(skb, GFP_ATOMIC);
610a09a4c8dSJesse Gross if (unlikely(err))
611a09a4c8dSJesse Gross return err;
612a09a4c8dSJesse Gross skb_shinfo(skb)->gso_type &= ~(NETIF_F_GSO_ENCAP_ALL >>
613a09a4c8dSJesse Gross NETIF_F_GSO_SHIFT);
614a09a4c8dSJesse Gross }
615a09a4c8dSJesse Gross
616a09a4c8dSJesse Gross skb->encapsulation = 0;
617a09a4c8dSJesse Gross return 0;
618a09a4c8dSJesse Gross }
619a09a4c8dSJesse Gross
iptunnel_xmit_stats(struct net_device * dev,int pkt_len)620039f5062SPravin B Shelar static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len)
621c5441932SPravin B Shelar {
622039f5062SPravin B Shelar if (pkt_len > 0) {
623039f5062SPravin B Shelar struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats);
624c5441932SPravin B Shelar
625c5441932SPravin B Shelar u64_stats_update_begin(&tstats->syncp);
6269962acefSEric Dumazet u64_stats_add(&tstats->tx_bytes, pkt_len);
6279962acefSEric Dumazet u64_stats_inc(&tstats->tx_packets);
628c5441932SPravin B Shelar u64_stats_update_end(&tstats->syncp);
629b4fe85f9SJason A. Donenfeld put_cpu_ptr(tstats);
6309b271ebaSEric Dumazet return;
6319b271ebaSEric Dumazet }
632039f5062SPravin B Shelar
633039f5062SPravin B Shelar if (pkt_len < 0) {
6349b271ebaSEric Dumazet DEV_STATS_INC(dev, tx_errors);
6359b271ebaSEric Dumazet DEV_STATS_INC(dev, tx_aborted_errors);
636c5441932SPravin B Shelar } else {
6379b271ebaSEric Dumazet DEV_STATS_INC(dev, tx_dropped);
638c5441932SPravin B Shelar }
639039f5062SPravin B Shelar }
6405243b6acSJesse Gross
ip_tunnel_info_opts_get(void * to,const struct ip_tunnel_info * info)6414c222798SPravin B Shelar static inline void ip_tunnel_info_opts_get(void *to,
6424c222798SPravin B Shelar const struct ip_tunnel_info *info)
6434c222798SPravin B Shelar {
6444c222798SPravin B Shelar memcpy(to, info + 1, info->options_len);
6454c222798SPravin B Shelar }
6464c222798SPravin B Shelar
ip_tunnel_info_opts_set(struct ip_tunnel_info * info,const void * from,int len,const unsigned long * flags)6474c222798SPravin B Shelar static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
648256c87c1SPieter Jansen van Vuuren const void *from, int len,
6495832c4a7SAlexander Lobakin const unsigned long *flags)
6504c222798SPravin B Shelar {
6514c222798SPravin B Shelar info->options_len = len;
6529c2e14b4SYi-Hung Wei if (len > 0) {
6539c2e14b4SYi-Hung Wei memcpy(ip_tunnel_info_opts(info), from, len);
6545832c4a7SAlexander Lobakin ip_tunnel_flags_or(info->key.tun_flags, info->key.tun_flags,
6555832c4a7SAlexander Lobakin flags);
6564c222798SPravin B Shelar }
6579c2e14b4SYi-Hung Wei }
6584c222798SPravin B Shelar
lwt_tun_info(struct lwtunnel_state * lwtstate)6593093fbe7SThomas Graf static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate)
6603093fbe7SThomas Graf {
6613093fbe7SThomas Graf return (struct ip_tunnel_info *)lwtstate->data;
6623093fbe7SThomas Graf }
6633093fbe7SThomas Graf
6645263a98fSDavidlohr Bueso DECLARE_STATIC_KEY_FALSE(ip_tunnel_metadata_cnt);
665e7030878SThomas Graf
666e7030878SThomas Graf /* Returns > 0 if metadata should be collected */
ip_tunnel_collect_metadata(void)667e7030878SThomas Graf static inline int ip_tunnel_collect_metadata(void)
668e7030878SThomas Graf {
6695263a98fSDavidlohr Bueso return static_branch_unlikely(&ip_tunnel_metadata_cnt);
670e7030878SThomas Graf }
671e7030878SThomas Graf
672045a0fa0SThomas Graf void __init ip_tunnel_core_init(void);
673045a0fa0SThomas Graf
674e7030878SThomas Graf void ip_tunnel_need_metadata(void);
675e7030878SThomas Graf void ip_tunnel_unneed_metadata(void);
676e7030878SThomas Graf
67705283187SThomas Graf #else /* CONFIG_INET */
67805283187SThomas Graf
lwt_tun_info(struct lwtunnel_state * lwtstate)67905283187SThomas Graf static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate)
68005283187SThomas Graf {
68105283187SThomas Graf return NULL;
68205283187SThomas Graf }
68305283187SThomas Graf
ip_tunnel_need_metadata(void)68405283187SThomas Graf static inline void ip_tunnel_need_metadata(void)
68505283187SThomas Graf {
68605283187SThomas Graf }
68705283187SThomas Graf
ip_tunnel_unneed_metadata(void)68805283187SThomas Graf static inline void ip_tunnel_unneed_metadata(void)
68905283187SThomas Graf {
69005283187SThomas Graf }
69105283187SThomas Graf
ip_tunnel_info_opts_get(void * to,const struct ip_tunnel_info * info)692e28e87edSDaniel Borkmann static inline void ip_tunnel_info_opts_get(void *to,
693e28e87edSDaniel Borkmann const struct ip_tunnel_info *info)
694e28e87edSDaniel Borkmann {
695e28e87edSDaniel Borkmann }
696e28e87edSDaniel Borkmann
ip_tunnel_info_opts_set(struct ip_tunnel_info * info,const void * from,int len,const unsigned long * flags)697e28e87edSDaniel Borkmann static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
698256c87c1SPieter Jansen van Vuuren const void *from, int len,
6995832c4a7SAlexander Lobakin const unsigned long *flags)
700e28e87edSDaniel Borkmann {
701e28e87edSDaniel Borkmann info->options_len = 0;
702e28e87edSDaniel Borkmann }
703e28e87edSDaniel Borkmann
7045243b6acSJesse Gross #endif /* CONFIG_INET */
7055243b6acSJesse Gross
706c5441932SPravin B Shelar #endif /* __NET_IP_TUNNELS_H */
707