/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __NET_IP_TUNNELS_H #define __NET_IP_TUNNELS_H … #include <linux/if_tunnel.h> #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/socket.h> #include <linux/types.h> #include <linux/u64_stats_sync.h> #include <linux/bitops.h> #include <net/dsfield.h> #include <net/gro_cells.h> #include <net/inet_ecn.h> #include <net/netns/generic.h> #include <net/rtnetlink.h> #include <net/lwtunnel.h> #include <net/dst_cache.h> #if IS_ENABLED(CONFIG_IPV6) #include <net/ipv6.h> #include <net/ip6_fib.h> #include <net/ip6_route.h> #endif /* Keep error state on tunnel for 30 sec */ #define IPTUNNEL_ERR_TIMEO … /* Used to memset ip_tunnel padding. */ #define IP_TUNNEL_KEY_SIZE … /* Used to memset ipv4 address padding. */ #define IP_TUNNEL_KEY_IPV4_PAD … #define IP_TUNNEL_KEY_IPV4_PAD_LEN … #define __ipt_flag_op(op, ...) … #define IP_TUNNEL_DECLARE_FLAGS(...) … #define ip_tunnel_flags_zero(...) … #define ip_tunnel_flags_copy(...) … #define ip_tunnel_flags_and(...) … #define ip_tunnel_flags_or(...) … #define ip_tunnel_flags_empty(...) … #define ip_tunnel_flags_intersect(...) … #define ip_tunnel_flags_subset(...) … struct ip_tunnel_key { … }; struct ip_tunnel_encap { … }; /* Flags for ip_tunnel_info mode. */ #define IP_TUNNEL_INFO_TX … #define IP_TUNNEL_INFO_IPV6 … #define IP_TUNNEL_INFO_BRIDGE … /* Maximum tunnel options length. */ #define IP_TUNNEL_OPTS_MAX … #define ip_tunnel_info_opts(info) … struct ip_tunnel_info { … }; /* 6rd prefix/relay information */ #ifdef CONFIG_IPV6_SIT_6RD struct ip_tunnel_6rd_parm { … }; #endif struct ip_tunnel_prl_entry { … }; struct metadata_dst; /* Kernel-side variant of ip_tunnel_parm */ struct ip_tunnel_parm_kern { … }; struct ip_tunnel { … }; struct tnl_ptk_info { … }; #define PACKET_RCVD … #define PACKET_REJECT … #define PACKET_NEXT … #define IP_TNL_HASH_BITS … #define IP_TNL_HASH_SIZE … struct ip_tunnel_net { … }; static inline void ip_tunnel_set_options_present(unsigned long *flags) { … } static inline void ip_tunnel_clear_options_present(unsigned long *flags) { … } static inline bool ip_tunnel_is_options_present(const unsigned long *flags) { … } static inline bool ip_tunnel_flags_is_be16_compat(const unsigned long *flags) { … } static inline void ip_tunnel_flags_from_be16(unsigned long *dst, __be16 flags) { … } static inline __be16 ip_tunnel_flags_to_be16(const unsigned long *flags) { … } static inline void 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) { … } static inline bool ip_tunnel_dst_cache_usable(const struct sk_buff *skb, const struct ip_tunnel_info *info) { … } static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info *tun_info) { … } static inline __be64 key32_to_tunnel_id(__be32 key) { … } /* Returns the least-significant 32 bits of a __be64. */ static inline __be32 tunnel_id_to_key32(__be64 tun_id) { … } #ifdef CONFIG_INET static inline void 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) { … } int ip_tunnel_init(struct net_device *dev); void ip_tunnel_uninit(struct net_device *dev); void ip_tunnel_dellink(struct net_device *dev, struct list_head *head); struct net *ip_tunnel_get_link_net(const struct net_device *dev); int ip_tunnel_get_iflink(const struct net_device *dev); int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id, struct rtnl_link_ops *ops, char *devname); void ip_tunnel_delete_nets(struct list_head *list_net, unsigned int id, struct rtnl_link_ops *ops, struct list_head *dev_to_kill); void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, const struct iphdr *tnl_params, const u8 protocol); void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, const u8 proto, int tunnel_hlen); int ip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm_kern *p, int cmd); bool ip_tunnel_parm_from_user(struct ip_tunnel_parm_kern *kp, const void __user *data); bool ip_tunnel_parm_to_user(void __user *data, struct ip_tunnel_parm_kern *kp); int ip_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd); int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict); int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu); struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn, int link, const unsigned long *flags, __be32 remote, __be32 local, __be32 key); void ip_tunnel_md_udp_encap(struct sk_buff *skb, struct ip_tunnel_info *info); int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, bool log_ecn_error); int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[], struct ip_tunnel_parm_kern *p, __u32 fwmark); int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[], struct ip_tunnel_parm_kern *p, __u32 fwmark); void ip_tunnel_setup(struct net_device *dev, unsigned int net_id); bool ip_tunnel_netlink_encap_parms(struct nlattr *data[], struct ip_tunnel_encap *encap); void ip_tunnel_netlink_parms(struct nlattr *data[], struct ip_tunnel_parm_kern *parms); extern const struct header_ops ip_tunnel_header_ops; __be16 ip_tunnel_parse_protocol(const struct sk_buff *skb); struct ip_tunnel_encap_ops { … }; #define MAX_IPTUN_ENCAP_OPS … extern const struct ip_tunnel_encap_ops __rcu * iptun_encaps[MAX_IPTUN_ENCAP_OPS]; int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op, unsigned int num); int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op, unsigned int num); int ip_tunnel_encap_setup(struct ip_tunnel *t, struct ip_tunnel_encap *ipencap); static inline bool pskb_inet_may_pull(struct sk_buff *skb) { … } /* Variant of pskb_inet_may_pull(). */ static inline bool skb_vlan_inet_prepare(struct sk_buff *skb, bool inner_proto_inherit) { … } static inline int ip_encap_hlen(struct ip_tunnel_encap *e) { … } static inline int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel_encap *e, u8 *protocol, struct flowi4 *fl4) { … } /* Extract dsfield from inner protocol */ static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph, const struct sk_buff *skb) { … } static inline __be32 ip_tunnel_get_flowlabel(const struct iphdr *iph, const struct sk_buff *skb) { … } static inline u8 ip_tunnel_get_ttl(const struct iphdr *iph, const struct sk_buff *skb) { … } /* Propogate ECN bits out */ static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph, const struct sk_buff *skb) { … } int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto, bool raw_proto, bool xnet); static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto, bool xnet) { … } void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, __be32 src, __be32 dst, u8 proto, u8 tos, u8 ttl, __be16 df, bool xnet); struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, gfp_t flags); int skb_tunnel_check_pmtu(struct sk_buff *skb, struct dst_entry *encap_dst, int headroom, bool reply); int iptunnel_handle_offloads(struct sk_buff *skb, int gso_type_mask); static inline int iptunnel_pull_offloads(struct sk_buff *skb) { … } static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len) { … } static inline void ip_tunnel_info_opts_get(void *to, const struct ip_tunnel_info *info) { … } static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, const void *from, int len, const unsigned long *flags) { … } static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) { … } DECLARE_STATIC_KEY_FALSE(ip_tunnel_metadata_cnt); /* Returns > 0 if metadata should be collected */ static inline int ip_tunnel_collect_metadata(void) { … } void __init ip_tunnel_core_init(void); void ip_tunnel_need_metadata(void); void ip_tunnel_unneed_metadata(void); #else /* CONFIG_INET */ static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) { return NULL; } static inline void ip_tunnel_need_metadata(void) { } static inline void ip_tunnel_unneed_metadata(void) { } static inline void ip_tunnel_info_opts_get(void *to, const struct ip_tunnel_info *info) { } static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, const void *from, int len, const unsigned long *flags) { info->options_len = 0; } #endif /* CONFIG_INET */ #endif /* __NET_IP_TUNNELS_H */
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