1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2012a5729SPravin B Shelar #ifndef __NET_VXLAN_H 3012a5729SPravin B Shelar #define __NET_VXLAN_H 1 4012a5729SPravin B Shelar 55f35227eSJesse Gross #include <linux/if_vlan.h> 686a98057SAlexander Duyck #include <net/udp_tunnel.h> 7ee122c79SThomas Graf #include <net/dst_metadata.h> 87c46a640SAlexander Duyck #include <net/udp_tunnel.h> 9012a5729SPravin B Shelar 10828788acSJiri Benc /* VXLAN protocol (RFC 7348) header: 113511494cSThomas Graf * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 12828788acSJiri Benc * |R|R|R|R|I|R|R|R| Reserved | 133511494cSThomas Graf * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 143511494cSThomas Graf * | VXLAN Network Identifier (VNI) | Reserved | 153511494cSThomas Graf * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 163511494cSThomas Graf * 17828788acSJiri Benc * I = VXLAN Network Identifier (VNI) present. 18828788acSJiri Benc */ 19828788acSJiri Benc struct vxlanhdr { 20828788acSJiri Benc __be32 vx_flags; 21828788acSJiri Benc __be32 vx_vni; 22828788acSJiri Benc }; 23828788acSJiri Benc 24828788acSJiri Benc /* VXLAN header flags. */ 2554bfd872SJiri Benc #define VXLAN_HF_VNI cpu_to_be32(BIT(27)) 26828788acSJiri Benc 27828788acSJiri Benc #define VXLAN_N_VID (1u << 24) 28828788acSJiri Benc #define VXLAN_VID_MASK (VXLAN_N_VID - 1) 2954bfd872SJiri Benc #define VXLAN_VNI_MASK cpu_to_be32(VXLAN_VID_MASK << 8) 30828788acSJiri Benc #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) 31828788acSJiri Benc 32828788acSJiri Benc #define VNI_HASH_BITS 10 33828788acSJiri Benc #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) 34828788acSJiri Benc #define FDB_HASH_BITS 8 35828788acSJiri Benc #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) 36828788acSJiri Benc 37828788acSJiri Benc /* Remote checksum offload for VXLAN (VXLAN_F_REMCSUM_[RT]X): 38828788acSJiri Benc * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 39828788acSJiri Benc * |R|R|R|R|I|R|R|R|R|R|C| Reserved | 40828788acSJiri Benc * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 41828788acSJiri Benc * | VXLAN Network Identifier (VNI) |O| Csum start | 42828788acSJiri Benc * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 43828788acSJiri Benc * 44828788acSJiri Benc * C = Remote checksum offload bit. When set indicates that the 45828788acSJiri Benc * remote checksum offload data is present. 46828788acSJiri Benc * 47828788acSJiri Benc * O = Offset bit. Indicates the checksum offset relative to 48828788acSJiri Benc * checksum start. 49828788acSJiri Benc * 50828788acSJiri Benc * Csum start = Checksum start divided by two. 51828788acSJiri Benc * 52828788acSJiri Benc * http://tools.ietf.org/html/draft-herbert-vxlan-rco 53828788acSJiri Benc */ 54828788acSJiri Benc 55828788acSJiri Benc /* VXLAN-RCO header flags. */ 5654bfd872SJiri Benc #define VXLAN_HF_RCO cpu_to_be32(BIT(21)) 57828788acSJiri Benc 58828788acSJiri Benc /* Remote checksum offload header option */ 5954bfd872SJiri Benc #define VXLAN_RCO_MASK cpu_to_be32(0x7f) /* Last byte of vni field */ 6054bfd872SJiri Benc #define VXLAN_RCO_UDP cpu_to_be32(0x80) /* Indicate UDP RCO (TCP when not set *) */ 61828788acSJiri Benc #define VXLAN_RCO_SHIFT 1 /* Left shift of start */ 62828788acSJiri Benc #define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1) 6354bfd872SJiri Benc #define VXLAN_MAX_REMCSUM_START (0x7f << VXLAN_RCO_SHIFT) 64828788acSJiri Benc 65828788acSJiri Benc /* 66828788acSJiri Benc * VXLAN Group Based Policy Extension (VXLAN_F_GBP): 67828788acSJiri Benc * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 68828788acSJiri Benc * |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | 69828788acSJiri Benc * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 70828788acSJiri Benc * | VXLAN Network Identifier (VNI) | Reserved | 71828788acSJiri Benc * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 72828788acSJiri Benc * 73828788acSJiri Benc * G = Group Policy ID present. 74828788acSJiri Benc * 753511494cSThomas Graf * D = Don't Learn bit. When set, this bit indicates that the egress 763511494cSThomas Graf * VTEP MUST NOT learn the source address of the encapsulated frame. 773511494cSThomas Graf * 783511494cSThomas Graf * A = Indicates that the group policy has already been applied to 793511494cSThomas Graf * this packet. Policies MUST NOT be applied by devices when the 803511494cSThomas Graf * A bit is set. 813511494cSThomas Graf * 82828788acSJiri Benc * https://tools.ietf.org/html/draft-smith-vxlan-group-policy 833511494cSThomas Graf */ 843511494cSThomas Graf struct vxlanhdr_gbp { 850e715d6fSJiri Benc u8 vx_flags; 863511494cSThomas Graf #ifdef __LITTLE_ENDIAN_BITFIELD 870e715d6fSJiri Benc u8 reserved_flags1:3, 883511494cSThomas Graf policy_applied:1, 893511494cSThomas Graf reserved_flags2:2, 903511494cSThomas Graf dont_learn:1, 913511494cSThomas Graf reserved_flags3:1; 923511494cSThomas Graf #elif defined(__BIG_ENDIAN_BITFIELD) 930e715d6fSJiri Benc u8 reserved_flags1:1, 943511494cSThomas Graf dont_learn:1, 953511494cSThomas Graf reserved_flags2:2, 963511494cSThomas Graf policy_applied:1, 973511494cSThomas Graf reserved_flags3:3; 983511494cSThomas Graf #else 993511494cSThomas Graf #error "Please fix <asm/byteorder.h>" 1003511494cSThomas Graf #endif 1013511494cSThomas Graf __be16 policy_id; 1023511494cSThomas Graf __be32 vx_vni; 1033511494cSThomas Graf }; 1043511494cSThomas Graf 105828788acSJiri Benc /* VXLAN-GBP header flags. */ 10654bfd872SJiri Benc #define VXLAN_HF_GBP cpu_to_be32(BIT(31)) 107828788acSJiri Benc 10854bfd872SJiri Benc #define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | cpu_to_be32(0xFFFFFF)) 1093511494cSThomas Graf 1103511494cSThomas Graf /* skb->mark mapping 1113511494cSThomas Graf * 1123511494cSThomas Graf * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 1133511494cSThomas Graf * |R|R|R|R|R|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | 1143511494cSThomas Graf * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 1153511494cSThomas Graf */ 1163511494cSThomas Graf #define VXLAN_GBP_DONT_LEARN (BIT(6) << 16) 1173511494cSThomas Graf #define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16) 1183511494cSThomas Graf #define VXLAN_GBP_ID_MASK (0xFFFF) 1193511494cSThomas Graf 120e1e5314dSJiri Benc /* 121e1e5314dSJiri Benc * VXLAN Generic Protocol Extension (VXLAN_F_GPE): 122e1e5314dSJiri Benc * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 123e1e5314dSJiri Benc * |R|R|Ver|I|P|R|O| Reserved |Next Protocol | 124e1e5314dSJiri Benc * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 125e1e5314dSJiri Benc * | VXLAN Network Identifier (VNI) | Reserved | 126e1e5314dSJiri Benc * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 127e1e5314dSJiri Benc * 128e1e5314dSJiri Benc * Ver = Version. Indicates VXLAN GPE protocol version. 129e1e5314dSJiri Benc * 130e1e5314dSJiri Benc * P = Next Protocol Bit. The P bit is set to indicate that the 131e1e5314dSJiri Benc * Next Protocol field is present. 132e1e5314dSJiri Benc * 133e1e5314dSJiri Benc * O = OAM Flag Bit. The O bit is set to indicate that the packet 134e1e5314dSJiri Benc * is an OAM packet. 135e1e5314dSJiri Benc * 136e1e5314dSJiri Benc * Next Protocol = This 8 bit field indicates the protocol header 137e1e5314dSJiri Benc * immediately following the VXLAN GPE header. 138e1e5314dSJiri Benc * 139e1e5314dSJiri Benc * https://tools.ietf.org/html/draft-ietf-nvo3-vxlan-gpe-01 140e1e5314dSJiri Benc */ 141e1e5314dSJiri Benc 142e1e5314dSJiri Benc struct vxlanhdr_gpe { 143e1e5314dSJiri Benc #if defined(__LITTLE_ENDIAN_BITFIELD) 144e1e5314dSJiri Benc u8 oam_flag:1, 145e1e5314dSJiri Benc reserved_flags1:1, 146e1e5314dSJiri Benc np_applied:1, 147e1e5314dSJiri Benc instance_applied:1, 148e1e5314dSJiri Benc version:2, 149e1e5314dSJiri Benc reserved_flags2:2; 150e1e5314dSJiri Benc #elif defined(__BIG_ENDIAN_BITFIELD) 151e1e5314dSJiri Benc u8 reserved_flags2:2, 152e1e5314dSJiri Benc version:2, 153e1e5314dSJiri Benc instance_applied:1, 154e1e5314dSJiri Benc np_applied:1, 155e1e5314dSJiri Benc reserved_flags1:1, 156e1e5314dSJiri Benc oam_flag:1; 157e1e5314dSJiri Benc #endif 158e1e5314dSJiri Benc u8 reserved_flags3; 159e1e5314dSJiri Benc u8 reserved_flags4; 160e1e5314dSJiri Benc u8 next_protocol; 161e1e5314dSJiri Benc __be32 vx_vni; 162e1e5314dSJiri Benc }; 163e1e5314dSJiri Benc 164e1e5314dSJiri Benc /* VXLAN-GPE header flags. */ 165e1e5314dSJiri Benc #define VXLAN_HF_VER cpu_to_be32(BIT(29) | BIT(28)) 166e1e5314dSJiri Benc #define VXLAN_HF_NP cpu_to_be32(BIT(26)) 167e1e5314dSJiri Benc #define VXLAN_HF_OAM cpu_to_be32(BIT(24)) 168e1e5314dSJiri Benc 169e1e5314dSJiri Benc #define VXLAN_GPE_USED_BITS (VXLAN_HF_VER | VXLAN_HF_NP | VXLAN_HF_OAM | \ 170e1e5314dSJiri Benc cpu_to_be32(0xff)) 171e1e5314dSJiri Benc 1723511494cSThomas Graf struct vxlan_metadata { 1733511494cSThomas Graf u32 gbp; 1743511494cSThomas Graf }; 1753511494cSThomas Graf 176012a5729SPravin B Shelar /* per UDP socket information */ 177012a5729SPravin B Shelar struct vxlan_sock { 178012a5729SPravin B Shelar struct hlist_node hlist; 179012a5729SPravin B Shelar struct socket *sock; 180012a5729SPravin B Shelar struct hlist_head vni_list[VNI_HASH_SIZE]; 18166af846fSReshetova, Elena refcount_t refcnt; 182dfd8645eSTom Herbert u32 flags; 183012a5729SPravin B Shelar }; 184012a5729SPravin B Shelar 1850dfbdf41SThomas Graf union vxlan_addr { 1860dfbdf41SThomas Graf struct sockaddr_in sin; 1870dfbdf41SThomas Graf struct sockaddr_in6 sin6; 1880dfbdf41SThomas Graf struct sockaddr sa; 1890dfbdf41SThomas Graf }; 1900dfbdf41SThomas Graf 1910dfbdf41SThomas Graf struct vxlan_rdst { 1920dfbdf41SThomas Graf union vxlan_addr remote_ip; 1930dfbdf41SThomas Graf __be16 remote_port; 19454bfd872SJiri Benc __be32 remote_vni; 1950dfbdf41SThomas Graf u32 remote_ifindex; 1960dfbdf41SThomas Graf struct list_head list; 1970dfbdf41SThomas Graf struct rcu_head rcu; 1980c1d70afSPaolo Abeni struct dst_cache dst_cache; 1990dfbdf41SThomas Graf }; 2000dfbdf41SThomas Graf 2010dfbdf41SThomas Graf struct vxlan_config { 2020dfbdf41SThomas Graf union vxlan_addr remote_ip; 2030dfbdf41SThomas Graf union vxlan_addr saddr; 20454bfd872SJiri Benc __be32 vni; 2050dfbdf41SThomas Graf int remote_ifindex; 2060dfbdf41SThomas Graf int mtu; 2070dfbdf41SThomas Graf __be16 dst_port; 2080e715d6fSJiri Benc u16 port_min; 2090e715d6fSJiri Benc u16 port_max; 2100e715d6fSJiri Benc u8 tos; 2110e715d6fSJiri Benc u8 ttl; 212e7f70af1SDaniel Borkmann __be32 label; 2130dfbdf41SThomas Graf u32 flags; 2140dfbdf41SThomas Graf unsigned long age_interval; 2150dfbdf41SThomas Graf unsigned int addrmax; 2160dfbdf41SThomas Graf bool no_share; 2170dfbdf41SThomas Graf }; 2180dfbdf41SThomas Graf 21969e76661SJiri Benc struct vxlan_dev_node { 22069e76661SJiri Benc struct hlist_node hlist; 22169e76661SJiri Benc struct vxlan_dev *vxlan; 22269e76661SJiri Benc }; 22369e76661SJiri Benc 2240dfbdf41SThomas Graf /* Pseudo network device */ 2250dfbdf41SThomas Graf struct vxlan_dev { 22669e76661SJiri Benc struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */ 22769e76661SJiri Benc #if IS_ENABLED(CONFIG_IPV6) 22869e76661SJiri Benc struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */ 22969e76661SJiri Benc #endif 2300dfbdf41SThomas Graf struct list_head next; /* vxlan's per namespace list */ 231c6fcc4fcSpravin shelar struct vxlan_sock __rcu *vn4_sock; /* listening socket for IPv4 */ 232b1be00a6SJiri Benc #if IS_ENABLED(CONFIG_IPV6) 233c6fcc4fcSpravin shelar struct vxlan_sock __rcu *vn6_sock; /* listening socket for IPv6 */ 234b1be00a6SJiri Benc #endif 2350dfbdf41SThomas Graf struct net_device *dev; 2360dfbdf41SThomas Graf struct net *net; /* netns for packet i/o */ 2370dfbdf41SThomas Graf struct vxlan_rdst default_dst; /* default destination */ 2380dfbdf41SThomas Graf 2390dfbdf41SThomas Graf struct timer_list age_timer; 2400dfbdf41SThomas Graf spinlock_t hash_lock; 2410dfbdf41SThomas Graf unsigned int addrcnt; 24258ce31ccSTom Herbert struct gro_cells gro_cells; 2430dfbdf41SThomas Graf 2440dfbdf41SThomas Graf struct vxlan_config cfg; 2450dfbdf41SThomas Graf 2460dfbdf41SThomas Graf struct hlist_head fdb_head[FDB_HASH_SIZE]; 2470dfbdf41SThomas Graf }; 2480dfbdf41SThomas Graf 249359a0ea9STom Herbert #define VXLAN_F_LEARN 0x01 250359a0ea9STom Herbert #define VXLAN_F_PROXY 0x02 251359a0ea9STom Herbert #define VXLAN_F_RSC 0x04 252359a0ea9STom Herbert #define VXLAN_F_L2MISS 0x08 253359a0ea9STom Herbert #define VXLAN_F_L3MISS 0x10 254359a0ea9STom Herbert #define VXLAN_F_IPV6 0x20 2556ceb31caSAlexander Duyck #define VXLAN_F_UDP_ZERO_CSUM_TX 0x40 256359a0ea9STom Herbert #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80 257359a0ea9STom Herbert #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100 258dfd8645eSTom Herbert #define VXLAN_F_REMCSUM_TX 0x200 259dfd8645eSTom Herbert #define VXLAN_F_REMCSUM_RX 0x400 2603511494cSThomas Graf #define VXLAN_F_GBP 0x800 2610ace2ca8STom Herbert #define VXLAN_F_REMCSUM_NOPARTIAL 0x1000 262ee122c79SThomas Graf #define VXLAN_F_COLLECT_METADATA 0x2000 263e1e5314dSJiri Benc #define VXLAN_F_GPE 0x4000 2640f22a3c6SMatthias Schiffer #define VXLAN_F_IPV6_LINKLOCAL 0x8000 265359a0ea9STom Herbert 266d299ce14SSimon Horman /* Flags that are used in the receive path. These flags must match in 267af33c1adSTom Herbert * order for a socket to be shareable 268af33c1adSTom Herbert */ 269af33c1adSTom Herbert #define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \ 270e1e5314dSJiri Benc VXLAN_F_GPE | \ 271af33c1adSTom Herbert VXLAN_F_UDP_ZERO_CSUM6_RX | \ 2720ace2ca8STom Herbert VXLAN_F_REMCSUM_RX | \ 273ee122c79SThomas Graf VXLAN_F_REMCSUM_NOPARTIAL | \ 274da8b43c0SAlexei Starovoitov VXLAN_F_COLLECT_METADATA) 275ac5132d1SThomas Graf 276e1e5314dSJiri Benc /* Flags that can be set together with VXLAN_F_GPE. */ 277e1e5314dSJiri Benc #define VXLAN_F_ALLOWED_GPE (VXLAN_F_GPE | \ 278e1e5314dSJiri Benc VXLAN_F_IPV6 | \ 2790f22a3c6SMatthias Schiffer VXLAN_F_IPV6_LINKLOCAL | \ 280e1e5314dSJiri Benc VXLAN_F_UDP_ZERO_CSUM_TX | \ 281e1e5314dSJiri Benc VXLAN_F_UDP_ZERO_CSUM6_TX | \ 282e1e5314dSJiri Benc VXLAN_F_UDP_ZERO_CSUM6_RX | \ 283e1e5314dSJiri Benc VXLAN_F_COLLECT_METADATA) 284e1e5314dSJiri Benc 2850dfbdf41SThomas Graf struct net_device *vxlan_dev_create(struct net *net, const char *name, 2860dfbdf41SThomas Graf u8 name_assign_type, struct vxlan_config *conf); 2870dfbdf41SThomas Graf 2885f35227eSJesse Gross static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, 2895f35227eSJesse Gross netdev_features_t features) 29011bf7828SJoe Stringer { 2915f35227eSJesse Gross u8 l4_hdr = 0; 2925f35227eSJesse Gross 2935f35227eSJesse Gross if (!skb->encapsulation) 2945f35227eSJesse Gross return features; 2955f35227eSJesse Gross 2965f35227eSJesse Gross switch (vlan_get_protocol(skb)) { 2975f35227eSJesse Gross case htons(ETH_P_IP): 2985f35227eSJesse Gross l4_hdr = ip_hdr(skb)->protocol; 2995f35227eSJesse Gross break; 3005f35227eSJesse Gross case htons(ETH_P_IPV6): 3015f35227eSJesse Gross l4_hdr = ipv6_hdr(skb)->nexthdr; 3025f35227eSJesse Gross break; 3035f35227eSJesse Gross default: 3045f35227eSJesse Gross return features;; 3055f35227eSJesse Gross } 3065f35227eSJesse Gross 3075f35227eSJesse Gross if ((l4_hdr == IPPROTO_UDP) && 30811bf7828SJoe Stringer (skb->inner_protocol_type != ENCAP_TYPE_ETHER || 30911bf7828SJoe Stringer skb->inner_protocol != htons(ETH_P_TEB) || 31011bf7828SJoe Stringer (skb_inner_mac_header(skb) - skb_transport_header(skb) != 311af67eb9eSAlexander Duyck sizeof(struct udphdr) + sizeof(struct vxlanhdr)) || 312af67eb9eSAlexander Duyck (skb->ip_summed != CHECKSUM_NONE && 313af67eb9eSAlexander Duyck !can_checksum_protocol(features, inner_eth_hdr(skb)->h_proto)))) 314a188222bSTom Herbert return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); 31511bf7828SJoe Stringer 3165f35227eSJesse Gross return features; 31711bf7828SJoe Stringer } 31823e62de3SJoe Stringer 319e6cd988cSJoseph Gasparakis /* IP header + UDP + VXLAN + Ethernet header */ 320e6cd988cSJoseph Gasparakis #define VXLAN_HEADROOM (20 + 8 + 8 + 14) 321e6cd988cSJoseph Gasparakis /* IPv6 header + UDP + VXLAN + Ethernet header */ 322e6cd988cSJoseph Gasparakis #define VXLAN6_HEADROOM (40 + 8 + 8 + 14) 323e6cd988cSJoseph Gasparakis 324d4ac05ffSJiri Benc static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb) 325d4ac05ffSJiri Benc { 326d4ac05ffSJiri Benc return (struct vxlanhdr *)(udp_hdr(skb) + 1); 327d4ac05ffSJiri Benc } 328d4ac05ffSJiri Benc 32954bfd872SJiri Benc static inline __be32 vxlan_vni(__be32 vni_field) 33054bfd872SJiri Benc { 33154bfd872SJiri Benc #if defined(__BIG_ENDIAN) 3325692d7eaSJiri Benc return (__force __be32)((__force u32)vni_field >> 8); 33354bfd872SJiri Benc #else 3345692d7eaSJiri Benc return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8); 33554bfd872SJiri Benc #endif 33654bfd872SJiri Benc } 33754bfd872SJiri Benc 33854bfd872SJiri Benc static inline __be32 vxlan_vni_field(__be32 vni) 33954bfd872SJiri Benc { 34054bfd872SJiri Benc #if defined(__BIG_ENDIAN) 3415692d7eaSJiri Benc return (__force __be32)((__force u32)vni << 8); 34254bfd872SJiri Benc #else 3435692d7eaSJiri Benc return (__force __be32)((__force u32)vni >> 8); 34454bfd872SJiri Benc #endif 34554bfd872SJiri Benc } 34654bfd872SJiri Benc 34754bfd872SJiri Benc static inline size_t vxlan_rco_start(__be32 vni_field) 34854bfd872SJiri Benc { 34954bfd872SJiri Benc return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; 35054bfd872SJiri Benc } 35154bfd872SJiri Benc 35254bfd872SJiri Benc static inline size_t vxlan_rco_offset(__be32 vni_field) 35354bfd872SJiri Benc { 35454bfd872SJiri Benc return (vni_field & VXLAN_RCO_UDP) ? 35554bfd872SJiri Benc offsetof(struct udphdr, check) : 35654bfd872SJiri Benc offsetof(struct tcphdr, check); 35754bfd872SJiri Benc } 35854bfd872SJiri Benc 35954bfd872SJiri Benc static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset) 36054bfd872SJiri Benc { 36154bfd872SJiri Benc __be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT); 36254bfd872SJiri Benc 36354bfd872SJiri Benc if (offset == offsetof(struct udphdr, check)) 36454bfd872SJiri Benc vni_field |= VXLAN_RCO_UDP; 36554bfd872SJiri Benc return vni_field; 36654bfd872SJiri Benc } 36754bfd872SJiri Benc 368705cc62fSJiri Benc static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs) 369705cc62fSJiri Benc { 370705cc62fSJiri Benc return vs->sock->sk->sk_family; 371705cc62fSJiri Benc } 37248e92c44SJiri Benc 37348e92c44SJiri Benc #endif 374