Pravin B Shelar | 012a572 | 2013-08-19 11:23:07 -0700 | [diff] [blame] | 1 | #ifndef __NET_VXLAN_H |
| 2 | #define __NET_VXLAN_H 1 |
| 3 | |
Jesse Gross | 5f35227 | 2014-12-23 22:37:26 -0800 | [diff] [blame] | 4 | #include <linux/if_vlan.h> |
Alexander Duyck | 86a9805 | 2016-06-16 12:20:44 -0700 | [diff] [blame] | 5 | #include <net/udp_tunnel.h> |
Thomas Graf | ee122c7 | 2015-07-21 10:43:58 +0200 | [diff] [blame] | 6 | #include <net/dst_metadata.h> |
Alexander Duyck | 7c46a64 | 2016-06-16 12:21:00 -0700 | [diff] [blame] | 7 | #include <net/udp_tunnel.h> |
Pravin B Shelar | 012a572 | 2013-08-19 11:23:07 -0700 | [diff] [blame] | 8 | |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 9 | /* VXLAN protocol (RFC 7348) header: |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 10 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 11 | * |R|R|R|R|I|R|R|R| Reserved | |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 12 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 13 | * | VXLAN Network Identifier (VNI) | Reserved | |
| 14 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 15 | * |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 16 | * I = VXLAN Network Identifier (VNI) present. |
| 17 | */ |
| 18 | struct vxlanhdr { |
| 19 | __be32 vx_flags; |
| 20 | __be32 vx_vni; |
| 21 | }; |
| 22 | |
| 23 | /* VXLAN header flags. */ |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 24 | #define VXLAN_HF_VNI cpu_to_be32(BIT(27)) |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 25 | |
| 26 | #define VXLAN_N_VID (1u << 24) |
| 27 | #define VXLAN_VID_MASK (VXLAN_N_VID - 1) |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 28 | #define VXLAN_VNI_MASK cpu_to_be32(VXLAN_VID_MASK << 8) |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 29 | #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) |
| 30 | |
| 31 | #define VNI_HASH_BITS 10 |
| 32 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) |
| 33 | #define FDB_HASH_BITS 8 |
| 34 | #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) |
| 35 | |
| 36 | /* Remote checksum offload for VXLAN (VXLAN_F_REMCSUM_[RT]X): |
| 37 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 38 | * |R|R|R|R|I|R|R|R|R|R|C| Reserved | |
| 39 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 40 | * | VXLAN Network Identifier (VNI) |O| Csum start | |
| 41 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 42 | * |
| 43 | * C = Remote checksum offload bit. When set indicates that the |
| 44 | * remote checksum offload data is present. |
| 45 | * |
| 46 | * O = Offset bit. Indicates the checksum offset relative to |
| 47 | * checksum start. |
| 48 | * |
| 49 | * Csum start = Checksum start divided by two. |
| 50 | * |
| 51 | * http://tools.ietf.org/html/draft-herbert-vxlan-rco |
| 52 | */ |
| 53 | |
| 54 | /* VXLAN-RCO header flags. */ |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 55 | #define VXLAN_HF_RCO cpu_to_be32(BIT(21)) |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 56 | |
| 57 | /* Remote checksum offload header option */ |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 58 | #define VXLAN_RCO_MASK cpu_to_be32(0x7f) /* Last byte of vni field */ |
| 59 | #define VXLAN_RCO_UDP cpu_to_be32(0x80) /* Indicate UDP RCO (TCP when not set *) */ |
| 60 | #define VXLAN_RCO_SHIFT 1 /* Left shift of start */ |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 61 | #define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1) |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 62 | #define VXLAN_MAX_REMCSUM_START (0x7f << VXLAN_RCO_SHIFT) |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 63 | |
| 64 | /* |
| 65 | * VXLAN Group Based Policy Extension (VXLAN_F_GBP): |
| 66 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 67 | * |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | |
| 68 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 69 | * | VXLAN Network Identifier (VNI) | Reserved | |
| 70 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 71 | * |
| 72 | * G = Group Policy ID present. |
| 73 | * |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 74 | * D = Don't Learn bit. When set, this bit indicates that the egress |
| 75 | * VTEP MUST NOT learn the source address of the encapsulated frame. |
| 76 | * |
| 77 | * A = Indicates that the group policy has already been applied to |
| 78 | * this packet. Policies MUST NOT be applied by devices when the |
| 79 | * A bit is set. |
| 80 | * |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 81 | * https://tools.ietf.org/html/draft-smith-vxlan-group-policy |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 82 | */ |
| 83 | struct vxlanhdr_gbp { |
Jiri Benc | 0e715d6 | 2016-02-02 18:09:11 +0100 | [diff] [blame] | 84 | u8 vx_flags; |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 85 | #ifdef __LITTLE_ENDIAN_BITFIELD |
Jiri Benc | 0e715d6 | 2016-02-02 18:09:11 +0100 | [diff] [blame] | 86 | u8 reserved_flags1:3, |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 87 | policy_applied:1, |
| 88 | reserved_flags2:2, |
| 89 | dont_learn:1, |
| 90 | reserved_flags3:1; |
| 91 | #elif defined(__BIG_ENDIAN_BITFIELD) |
Jiri Benc | 0e715d6 | 2016-02-02 18:09:11 +0100 | [diff] [blame] | 92 | u8 reserved_flags1:1, |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 93 | dont_learn:1, |
| 94 | reserved_flags2:2, |
| 95 | policy_applied:1, |
| 96 | reserved_flags3:3; |
| 97 | #else |
| 98 | #error "Please fix <asm/byteorder.h>" |
| 99 | #endif |
| 100 | __be16 policy_id; |
| 101 | __be32 vx_vni; |
| 102 | }; |
| 103 | |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 104 | /* VXLAN-GBP header flags. */ |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 105 | #define VXLAN_HF_GBP cpu_to_be32(BIT(31)) |
Jiri Benc | 828788a | 2016-02-02 18:09:13 +0100 | [diff] [blame] | 106 | |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 107 | #define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | cpu_to_be32(0xFFFFFF)) |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 108 | |
| 109 | /* skb->mark mapping |
| 110 | * |
| 111 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 112 | * |R|R|R|R|R|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | |
| 113 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 114 | */ |
| 115 | #define VXLAN_GBP_DONT_LEARN (BIT(6) << 16) |
| 116 | #define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16) |
| 117 | #define VXLAN_GBP_ID_MASK (0xFFFF) |
| 118 | |
Jiri Benc | e1e5314 | 2016-04-05 14:47:13 +0200 | [diff] [blame] | 119 | /* |
| 120 | * VXLAN Generic Protocol Extension (VXLAN_F_GPE): |
| 121 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 122 | * |R|R|Ver|I|P|R|O| Reserved |Next Protocol | |
| 123 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 124 | * | VXLAN Network Identifier (VNI) | Reserved | |
| 125 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 126 | * |
| 127 | * Ver = Version. Indicates VXLAN GPE protocol version. |
| 128 | * |
| 129 | * P = Next Protocol Bit. The P bit is set to indicate that the |
| 130 | * Next Protocol field is present. |
| 131 | * |
| 132 | * O = OAM Flag Bit. The O bit is set to indicate that the packet |
| 133 | * is an OAM packet. |
| 134 | * |
| 135 | * Next Protocol = This 8 bit field indicates the protocol header |
| 136 | * immediately following the VXLAN GPE header. |
| 137 | * |
| 138 | * https://tools.ietf.org/html/draft-ietf-nvo3-vxlan-gpe-01 |
| 139 | */ |
| 140 | |
| 141 | struct vxlanhdr_gpe { |
| 142 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
| 143 | u8 oam_flag:1, |
| 144 | reserved_flags1:1, |
| 145 | np_applied:1, |
| 146 | instance_applied:1, |
| 147 | version:2, |
| 148 | reserved_flags2:2; |
| 149 | #elif defined(__BIG_ENDIAN_BITFIELD) |
| 150 | u8 reserved_flags2:2, |
| 151 | version:2, |
| 152 | instance_applied:1, |
| 153 | np_applied:1, |
| 154 | reserved_flags1:1, |
| 155 | oam_flag:1; |
| 156 | #endif |
| 157 | u8 reserved_flags3; |
| 158 | u8 reserved_flags4; |
| 159 | u8 next_protocol; |
| 160 | __be32 vx_vni; |
| 161 | }; |
| 162 | |
| 163 | /* VXLAN-GPE header flags. */ |
| 164 | #define VXLAN_HF_VER cpu_to_be32(BIT(29) | BIT(28)) |
| 165 | #define VXLAN_HF_NP cpu_to_be32(BIT(26)) |
| 166 | #define VXLAN_HF_OAM cpu_to_be32(BIT(24)) |
| 167 | |
| 168 | #define VXLAN_GPE_USED_BITS (VXLAN_HF_VER | VXLAN_HF_NP | VXLAN_HF_OAM | \ |
| 169 | cpu_to_be32(0xff)) |
| 170 | |
| 171 | /* VXLAN-GPE header Next Protocol. */ |
| 172 | #define VXLAN_GPE_NP_IPV4 0x01 |
| 173 | #define VXLAN_GPE_NP_IPV6 0x02 |
| 174 | #define VXLAN_GPE_NP_ETHERNET 0x03 |
| 175 | #define VXLAN_GPE_NP_NSH 0x04 |
| 176 | |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 177 | struct vxlan_metadata { |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 178 | u32 gbp; |
| 179 | }; |
| 180 | |
Pravin B Shelar | 012a572 | 2013-08-19 11:23:07 -0700 | [diff] [blame] | 181 | /* per UDP socket information */ |
| 182 | struct vxlan_sock { |
| 183 | struct hlist_node hlist; |
Pravin B Shelar | 012a572 | 2013-08-19 11:23:07 -0700 | [diff] [blame] | 184 | struct socket *sock; |
Pravin B Shelar | 012a572 | 2013-08-19 11:23:07 -0700 | [diff] [blame] | 185 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
| 186 | atomic_t refcnt; |
Tom Herbert | dfd8645 | 2015-01-12 17:00:38 -0800 | [diff] [blame] | 187 | u32 flags; |
Pravin B Shelar | 012a572 | 2013-08-19 11:23:07 -0700 | [diff] [blame] | 188 | }; |
| 189 | |
Thomas Graf | 0dfbdf4 | 2015-07-21 10:44:02 +0200 | [diff] [blame] | 190 | union vxlan_addr { |
| 191 | struct sockaddr_in sin; |
| 192 | struct sockaddr_in6 sin6; |
| 193 | struct sockaddr sa; |
| 194 | }; |
| 195 | |
| 196 | struct vxlan_rdst { |
| 197 | union vxlan_addr remote_ip; |
| 198 | __be16 remote_port; |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 199 | __be32 remote_vni; |
Thomas Graf | 0dfbdf4 | 2015-07-21 10:44:02 +0200 | [diff] [blame] | 200 | u32 remote_ifindex; |
| 201 | struct list_head list; |
| 202 | struct rcu_head rcu; |
Paolo Abeni | 0c1d70a | 2016-02-12 15:43:56 +0100 | [diff] [blame] | 203 | struct dst_cache dst_cache; |
Thomas Graf | 0dfbdf4 | 2015-07-21 10:44:02 +0200 | [diff] [blame] | 204 | }; |
| 205 | |
| 206 | struct vxlan_config { |
| 207 | union vxlan_addr remote_ip; |
| 208 | union vxlan_addr saddr; |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 209 | __be32 vni; |
Thomas Graf | 0dfbdf4 | 2015-07-21 10:44:02 +0200 | [diff] [blame] | 210 | int remote_ifindex; |
| 211 | int mtu; |
| 212 | __be16 dst_port; |
Jiri Benc | 0e715d6 | 2016-02-02 18:09:11 +0100 | [diff] [blame] | 213 | u16 port_min; |
| 214 | u16 port_max; |
| 215 | u8 tos; |
| 216 | u8 ttl; |
Daniel Borkmann | e7f70af | 2016-03-09 03:00:03 +0100 | [diff] [blame] | 217 | __be32 label; |
Thomas Graf | 0dfbdf4 | 2015-07-21 10:44:02 +0200 | [diff] [blame] | 218 | u32 flags; |
| 219 | unsigned long age_interval; |
| 220 | unsigned int addrmax; |
| 221 | bool no_share; |
| 222 | }; |
| 223 | |
| 224 | /* Pseudo network device */ |
| 225 | struct vxlan_dev { |
| 226 | struct hlist_node hlist; /* vni hash table */ |
| 227 | struct list_head next; /* vxlan's per namespace list */ |
pravin shelar | c6fcc4f | 2016-10-28 09:59:15 -0700 | [diff] [blame] | 228 | struct vxlan_sock __rcu *vn4_sock; /* listening socket for IPv4 */ |
Jiri Benc | b1be00a | 2015-09-24 13:50:02 +0200 | [diff] [blame] | 229 | #if IS_ENABLED(CONFIG_IPV6) |
pravin shelar | c6fcc4f | 2016-10-28 09:59:15 -0700 | [diff] [blame] | 230 | struct vxlan_sock __rcu *vn6_sock; /* listening socket for IPv6 */ |
Jiri Benc | b1be00a | 2015-09-24 13:50:02 +0200 | [diff] [blame] | 231 | #endif |
Thomas Graf | 0dfbdf4 | 2015-07-21 10:44:02 +0200 | [diff] [blame] | 232 | struct net_device *dev; |
| 233 | struct net *net; /* netns for packet i/o */ |
| 234 | struct vxlan_rdst default_dst; /* default destination */ |
| 235 | u32 flags; /* VXLAN_F_* in vxlan.h */ |
| 236 | |
| 237 | struct timer_list age_timer; |
| 238 | spinlock_t hash_lock; |
| 239 | unsigned int addrcnt; |
Tom Herbert | 58ce31c | 2015-08-19 17:07:33 -0700 | [diff] [blame] | 240 | struct gro_cells gro_cells; |
Thomas Graf | 0dfbdf4 | 2015-07-21 10:44:02 +0200 | [diff] [blame] | 241 | |
| 242 | struct vxlan_config cfg; |
| 243 | |
| 244 | struct hlist_head fdb_head[FDB_HASH_SIZE]; |
| 245 | }; |
| 246 | |
Tom Herbert | 359a0ea | 2014-06-04 17:20:29 -0700 | [diff] [blame] | 247 | #define VXLAN_F_LEARN 0x01 |
| 248 | #define VXLAN_F_PROXY 0x02 |
| 249 | #define VXLAN_F_RSC 0x04 |
| 250 | #define VXLAN_F_L2MISS 0x08 |
| 251 | #define VXLAN_F_L3MISS 0x10 |
| 252 | #define VXLAN_F_IPV6 0x20 |
Alexander Duyck | 6ceb31c | 2016-02-19 11:26:31 -0800 | [diff] [blame] | 253 | #define VXLAN_F_UDP_ZERO_CSUM_TX 0x40 |
Tom Herbert | 359a0ea | 2014-06-04 17:20:29 -0700 | [diff] [blame] | 254 | #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80 |
| 255 | #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100 |
Tom Herbert | dfd8645 | 2015-01-12 17:00:38 -0800 | [diff] [blame] | 256 | #define VXLAN_F_REMCSUM_TX 0x200 |
| 257 | #define VXLAN_F_REMCSUM_RX 0x400 |
Thomas Graf | 3511494 | 2015-01-15 03:53:55 +0100 | [diff] [blame] | 258 | #define VXLAN_F_GBP 0x800 |
Tom Herbert | 0ace2ca | 2015-02-10 16:30:32 -0800 | [diff] [blame] | 259 | #define VXLAN_F_REMCSUM_NOPARTIAL 0x1000 |
Thomas Graf | ee122c7 | 2015-07-21 10:43:58 +0200 | [diff] [blame] | 260 | #define VXLAN_F_COLLECT_METADATA 0x2000 |
Jiri Benc | e1e5314 | 2016-04-05 14:47:13 +0200 | [diff] [blame] | 261 | #define VXLAN_F_GPE 0x4000 |
Tom Herbert | 359a0ea | 2014-06-04 17:20:29 -0700 | [diff] [blame] | 262 | |
Simon Horman | d299ce1 | 2015-03-12 11:00:10 +0900 | [diff] [blame] | 263 | /* Flags that are used in the receive path. These flags must match in |
Tom Herbert | af33c1a | 2015-01-20 11:23:05 -0800 | [diff] [blame] | 264 | * order for a socket to be shareable |
| 265 | */ |
| 266 | #define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \ |
Jiri Benc | e1e5314 | 2016-04-05 14:47:13 +0200 | [diff] [blame] | 267 | VXLAN_F_GPE | \ |
Tom Herbert | af33c1a | 2015-01-20 11:23:05 -0800 | [diff] [blame] | 268 | VXLAN_F_UDP_ZERO_CSUM6_RX | \ |
Tom Herbert | 0ace2ca | 2015-02-10 16:30:32 -0800 | [diff] [blame] | 269 | VXLAN_F_REMCSUM_RX | \ |
Thomas Graf | ee122c7 | 2015-07-21 10:43:58 +0200 | [diff] [blame] | 270 | VXLAN_F_REMCSUM_NOPARTIAL | \ |
Alexei Starovoitov | da8b43c | 2015-08-04 22:51:07 -0700 | [diff] [blame] | 271 | VXLAN_F_COLLECT_METADATA) |
Thomas Graf | ac5132d | 2015-01-15 03:53:56 +0100 | [diff] [blame] | 272 | |
Jiri Benc | e1e5314 | 2016-04-05 14:47:13 +0200 | [diff] [blame] | 273 | /* Flags that can be set together with VXLAN_F_GPE. */ |
| 274 | #define VXLAN_F_ALLOWED_GPE (VXLAN_F_GPE | \ |
| 275 | VXLAN_F_IPV6 | \ |
| 276 | VXLAN_F_UDP_ZERO_CSUM_TX | \ |
| 277 | VXLAN_F_UDP_ZERO_CSUM6_TX | \ |
| 278 | VXLAN_F_UDP_ZERO_CSUM6_RX | \ |
| 279 | VXLAN_F_COLLECT_METADATA) |
| 280 | |
Thomas Graf | 0dfbdf4 | 2015-07-21 10:44:02 +0200 | [diff] [blame] | 281 | struct net_device *vxlan_dev_create(struct net *net, const char *name, |
| 282 | u8 name_assign_type, struct vxlan_config *conf); |
| 283 | |
Jesse Gross | 5f35227 | 2014-12-23 22:37:26 -0800 | [diff] [blame] | 284 | static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, |
| 285 | netdev_features_t features) |
Joe Stringer | 11bf782 | 2014-11-17 16:24:54 -0800 | [diff] [blame] | 286 | { |
Jesse Gross | 5f35227 | 2014-12-23 22:37:26 -0800 | [diff] [blame] | 287 | u8 l4_hdr = 0; |
| 288 | |
| 289 | if (!skb->encapsulation) |
| 290 | return features; |
| 291 | |
| 292 | switch (vlan_get_protocol(skb)) { |
| 293 | case htons(ETH_P_IP): |
| 294 | l4_hdr = ip_hdr(skb)->protocol; |
| 295 | break; |
| 296 | case htons(ETH_P_IPV6): |
| 297 | l4_hdr = ipv6_hdr(skb)->nexthdr; |
| 298 | break; |
| 299 | default: |
| 300 | return features;; |
| 301 | } |
| 302 | |
| 303 | if ((l4_hdr == IPPROTO_UDP) && |
Joe Stringer | 11bf782 | 2014-11-17 16:24:54 -0800 | [diff] [blame] | 304 | (skb->inner_protocol_type != ENCAP_TYPE_ETHER || |
| 305 | skb->inner_protocol != htons(ETH_P_TEB) || |
| 306 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != |
Alexander Duyck | af67eb9e | 2016-05-02 09:25:16 -0700 | [diff] [blame] | 307 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)) || |
| 308 | (skb->ip_summed != CHECKSUM_NONE && |
| 309 | !can_checksum_protocol(features, inner_eth_hdr(skb)->h_proto)))) |
Tom Herbert | a188222 | 2015-12-14 11:19:43 -0800 | [diff] [blame] | 310 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
Joe Stringer | 11bf782 | 2014-11-17 16:24:54 -0800 | [diff] [blame] | 311 | |
Jesse Gross | 5f35227 | 2014-12-23 22:37:26 -0800 | [diff] [blame] | 312 | return features; |
Joe Stringer | 11bf782 | 2014-11-17 16:24:54 -0800 | [diff] [blame] | 313 | } |
Joe Stringer | 23e62de | 2014-11-13 16:38:12 -0800 | [diff] [blame] | 314 | |
Joseph Gasparakis | e6cd988 | 2013-10-24 06:27:10 +0000 | [diff] [blame] | 315 | /* IP header + UDP + VXLAN + Ethernet header */ |
| 316 | #define VXLAN_HEADROOM (20 + 8 + 8 + 14) |
| 317 | /* IPv6 header + UDP + VXLAN + Ethernet header */ |
| 318 | #define VXLAN6_HEADROOM (40 + 8 + 8 + 14) |
| 319 | |
Jiri Benc | d4ac05f | 2016-02-16 21:58:57 +0100 | [diff] [blame] | 320 | static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb) |
| 321 | { |
| 322 | return (struct vxlanhdr *)(udp_hdr(skb) + 1); |
| 323 | } |
| 324 | |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 325 | static inline __be32 vxlan_vni(__be32 vni_field) |
| 326 | { |
| 327 | #if defined(__BIG_ENDIAN) |
Jiri Benc | 5692d7e | 2016-03-21 17:39:18 +0100 | [diff] [blame] | 328 | return (__force __be32)((__force u32)vni_field >> 8); |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 329 | #else |
Jiri Benc | 5692d7e | 2016-03-21 17:39:18 +0100 | [diff] [blame] | 330 | return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8); |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 331 | #endif |
| 332 | } |
| 333 | |
| 334 | static inline __be32 vxlan_vni_field(__be32 vni) |
| 335 | { |
| 336 | #if defined(__BIG_ENDIAN) |
Jiri Benc | 5692d7e | 2016-03-21 17:39:18 +0100 | [diff] [blame] | 337 | return (__force __be32)((__force u32)vni << 8); |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 338 | #else |
Jiri Benc | 5692d7e | 2016-03-21 17:39:18 +0100 | [diff] [blame] | 339 | return (__force __be32)((__force u32)vni >> 8); |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 340 | #endif |
| 341 | } |
| 342 | |
Jiri Benc | 54bfd87 | 2016-02-16 21:58:58 +0100 | [diff] [blame] | 343 | static inline size_t vxlan_rco_start(__be32 vni_field) |
| 344 | { |
| 345 | return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; |
| 346 | } |
| 347 | |
| 348 | static inline size_t vxlan_rco_offset(__be32 vni_field) |
| 349 | { |
| 350 | return (vni_field & VXLAN_RCO_UDP) ? |
| 351 | offsetof(struct udphdr, check) : |
| 352 | offsetof(struct tcphdr, check); |
| 353 | } |
| 354 | |
| 355 | static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset) |
| 356 | { |
| 357 | __be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT); |
| 358 | |
| 359 | if (offset == offsetof(struct udphdr, check)) |
| 360 | vni_field |= VXLAN_RCO_UDP; |
| 361 | return vni_field; |
| 362 | } |
| 363 | |
Jiri Benc | 705cc62 | 2015-08-20 13:56:28 +0200 | [diff] [blame] | 364 | static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs) |
| 365 | { |
| 366 | return vs->sock->sk->sk_family; |
| 367 | } |
Jiri Benc | 48e92c4 | 2015-08-25 18:36:50 +0200 | [diff] [blame] | 368 | |
| 369 | #endif |