Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
012a5729 PS |
2 | #ifndef __NET_VXLAN_H |
3 | #define __NET_VXLAN_H 1 | |
4 | ||
5f35227e | 5 | #include <linux/if_vlan.h> |
a3a48de5 | 6 | #include <linux/rhashtable-types.h> |
86a98057 | 7 | #include <net/udp_tunnel.h> |
ee122c79 | 8 | #include <net/dst_metadata.h> |
5ff4ff4f | 9 | #include <net/rtnetlink.h> |
9a997353 | 10 | #include <net/switchdev.h> |
1274e1cc | 11 | #include <net/nexthop.h> |
012a5729 | 12 | |
bea96410 | 13 | #define IANA_VXLAN_UDP_PORT 4789 |
ed618bd8 | 14 | #define IANA_VXLAN_GPE_UDP_PORT 4790 |
bea96410 | 15 | |
828788ac JB |
16 | /* VXLAN protocol (RFC 7348) header: |
17 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
18 | * |R|R|R|R|I|R|R|R| Reserved | | |
19 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
20 | * | VXLAN Network Identifier (VNI) | Reserved | | |
21 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
22 | * | |
23 | * I = VXLAN Network Identifier (VNI) present. | |
24 | */ | |
25 | struct vxlanhdr { | |
26 | __be32 vx_flags; | |
27 | __be32 vx_vni; | |
28 | }; | |
29 | ||
30 | /* VXLAN header flags. */ | |
54bfd872 | 31 | #define VXLAN_HF_VNI cpu_to_be32(BIT(27)) |
828788ac JB |
32 | |
33 | #define VXLAN_N_VID (1u << 24) | |
34 | #define VXLAN_VID_MASK (VXLAN_N_VID - 1) | |
54bfd872 | 35 | #define VXLAN_VNI_MASK cpu_to_be32(VXLAN_VID_MASK << 8) |
828788ac JB |
36 | #define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr)) |
37 | ||
38 | #define VNI_HASH_BITS 10 | |
39 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
40 | #define FDB_HASH_BITS 8 | |
41 | #define FDB_HASH_SIZE (1<<FDB_HASH_BITS) | |
42 | ||
43 | /* Remote checksum offload for VXLAN (VXLAN_F_REMCSUM_[RT]X): | |
44 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
45 | * |R|R|R|R|I|R|R|R|R|R|C| Reserved | | |
46 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
47 | * | VXLAN Network Identifier (VNI) |O| Csum start | | |
48 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
49 | * | |
50 | * C = Remote checksum offload bit. When set indicates that the | |
51 | * remote checksum offload data is present. | |
52 | * | |
53 | * O = Offset bit. Indicates the checksum offset relative to | |
54 | * checksum start. | |
55 | * | |
56 | * Csum start = Checksum start divided by two. | |
57 | * | |
58 | * http://tools.ietf.org/html/draft-herbert-vxlan-rco | |
59 | */ | |
60 | ||
61 | /* VXLAN-RCO header flags. */ | |
54bfd872 | 62 | #define VXLAN_HF_RCO cpu_to_be32(BIT(21)) |
828788ac JB |
63 | |
64 | /* Remote checksum offload header option */ | |
54bfd872 JB |
65 | #define VXLAN_RCO_MASK cpu_to_be32(0x7f) /* Last byte of vni field */ |
66 | #define VXLAN_RCO_UDP cpu_to_be32(0x80) /* Indicate UDP RCO (TCP when not set *) */ | |
67 | #define VXLAN_RCO_SHIFT 1 /* Left shift of start */ | |
828788ac | 68 | #define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1) |
54bfd872 | 69 | #define VXLAN_MAX_REMCSUM_START (0x7f << VXLAN_RCO_SHIFT) |
828788ac | 70 | |
3511494c | 71 | /* |
828788ac | 72 | * VXLAN Group Based Policy Extension (VXLAN_F_GBP): |
3511494c | 73 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
828788ac | 74 | * |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | |
3511494c TG |
75 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
76 | * | VXLAN Network Identifier (VNI) | Reserved | | |
77 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
78 | * | |
828788ac JB |
79 | * G = Group Policy ID present. |
80 | * | |
3511494c TG |
81 | * D = Don't Learn bit. When set, this bit indicates that the egress |
82 | * VTEP MUST NOT learn the source address of the encapsulated frame. | |
83 | * | |
84 | * A = Indicates that the group policy has already been applied to | |
85 | * this packet. Policies MUST NOT be applied by devices when the | |
86 | * A bit is set. | |
87 | * | |
828788ac | 88 | * https://tools.ietf.org/html/draft-smith-vxlan-group-policy |
3511494c TG |
89 | */ |
90 | struct vxlanhdr_gbp { | |
0e715d6f | 91 | u8 vx_flags; |
3511494c | 92 | #ifdef __LITTLE_ENDIAN_BITFIELD |
0e715d6f | 93 | u8 reserved_flags1:3, |
3511494c TG |
94 | policy_applied:1, |
95 | reserved_flags2:2, | |
96 | dont_learn:1, | |
97 | reserved_flags3:1; | |
98 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
0e715d6f | 99 | u8 reserved_flags1:1, |
3511494c TG |
100 | dont_learn:1, |
101 | reserved_flags2:2, | |
102 | policy_applied:1, | |
103 | reserved_flags3:3; | |
104 | #else | |
105 | #error "Please fix <asm/byteorder.h>" | |
106 | #endif | |
107 | __be16 policy_id; | |
108 | __be32 vx_vni; | |
109 | }; | |
110 | ||
828788ac | 111 | /* VXLAN-GBP header flags. */ |
54bfd872 | 112 | #define VXLAN_HF_GBP cpu_to_be32(BIT(31)) |
828788ac | 113 | |
54bfd872 | 114 | #define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | cpu_to_be32(0xFFFFFF)) |
3511494c TG |
115 | |
116 | /* skb->mark mapping | |
117 | * | |
118 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
119 | * |R|R|R|R|R|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | | |
120 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
121 | */ | |
122 | #define VXLAN_GBP_DONT_LEARN (BIT(6) << 16) | |
123 | #define VXLAN_GBP_POLICY_APPLIED (BIT(3) << 16) | |
124 | #define VXLAN_GBP_ID_MASK (0xFFFF) | |
125 | ||
13e6ce98 XL |
126 | #define VXLAN_GBP_MASK (VXLAN_GBP_DONT_LEARN | VXLAN_GBP_POLICY_APPLIED | \ |
127 | VXLAN_GBP_ID_MASK) | |
128 | ||
e1e5314d JB |
129 | /* |
130 | * VXLAN Generic Protocol Extension (VXLAN_F_GPE): | |
131 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
132 | * |R|R|Ver|I|P|R|O| Reserved |Next Protocol | | |
133 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
134 | * | VXLAN Network Identifier (VNI) | Reserved | | |
135 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
136 | * | |
137 | * Ver = Version. Indicates VXLAN GPE protocol version. | |
138 | * | |
139 | * P = Next Protocol Bit. The P bit is set to indicate that the | |
140 | * Next Protocol field is present. | |
141 | * | |
142 | * O = OAM Flag Bit. The O bit is set to indicate that the packet | |
143 | * is an OAM packet. | |
144 | * | |
145 | * Next Protocol = This 8 bit field indicates the protocol header | |
146 | * immediately following the VXLAN GPE header. | |
147 | * | |
148 | * https://tools.ietf.org/html/draft-ietf-nvo3-vxlan-gpe-01 | |
149 | */ | |
150 | ||
151 | struct vxlanhdr_gpe { | |
152 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
153 | u8 oam_flag:1, | |
154 | reserved_flags1:1, | |
155 | np_applied:1, | |
156 | instance_applied:1, | |
157 | version:2, | |
f1c8d372 | 158 | reserved_flags2:2; |
e1e5314d JB |
159 | #elif defined(__BIG_ENDIAN_BITFIELD) |
160 | u8 reserved_flags2:2, | |
161 | version:2, | |
162 | instance_applied:1, | |
163 | np_applied:1, | |
164 | reserved_flags1:1, | |
165 | oam_flag:1; | |
166 | #endif | |
167 | u8 reserved_flags3; | |
168 | u8 reserved_flags4; | |
169 | u8 next_protocol; | |
170 | __be32 vx_vni; | |
171 | }; | |
172 | ||
173 | /* VXLAN-GPE header flags. */ | |
174 | #define VXLAN_HF_VER cpu_to_be32(BIT(29) | BIT(28)) | |
175 | #define VXLAN_HF_NP cpu_to_be32(BIT(26)) | |
176 | #define VXLAN_HF_OAM cpu_to_be32(BIT(24)) | |
177 | ||
178 | #define VXLAN_GPE_USED_BITS (VXLAN_HF_VER | VXLAN_HF_NP | VXLAN_HF_OAM | \ | |
179 | cpu_to_be32(0xff)) | |
180 | ||
3511494c | 181 | struct vxlan_metadata { |
3511494c TG |
182 | u32 gbp; |
183 | }; | |
184 | ||
012a5729 PS |
185 | /* per UDP socket information */ |
186 | struct vxlan_sock { | |
187 | struct hlist_node hlist; | |
012a5729 | 188 | struct socket *sock; |
012a5729 | 189 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
66af846f | 190 | refcount_t refcnt; |
dfd8645e | 191 | u32 flags; |
012a5729 PS |
192 | }; |
193 | ||
0dfbdf41 TG |
194 | union vxlan_addr { |
195 | struct sockaddr_in sin; | |
196 | struct sockaddr_in6 sin6; | |
197 | struct sockaddr sa; | |
198 | }; | |
199 | ||
200 | struct vxlan_rdst { | |
201 | union vxlan_addr remote_ip; | |
202 | __be16 remote_port; | |
0efe1173 | 203 | u8 offloaded:1; |
54bfd872 | 204 | __be32 remote_vni; |
0dfbdf41 | 205 | u32 remote_ifindex; |
0ce1822c | 206 | struct net_device *remote_dev; |
0dfbdf41 TG |
207 | struct list_head list; |
208 | struct rcu_head rcu; | |
0c1d70af | 209 | struct dst_cache dst_cache; |
0dfbdf41 TG |
210 | }; |
211 | ||
212 | struct vxlan_config { | |
213 | union vxlan_addr remote_ip; | |
214 | union vxlan_addr saddr; | |
54bfd872 | 215 | __be32 vni; |
0dfbdf41 TG |
216 | int remote_ifindex; |
217 | int mtu; | |
218 | __be16 dst_port; | |
0e715d6f JB |
219 | u16 port_min; |
220 | u16 port_max; | |
221 | u8 tos; | |
222 | u8 ttl; | |
e7f70af1 | 223 | __be32 label; |
0dfbdf41 TG |
224 | u32 flags; |
225 | unsigned long age_interval; | |
226 | unsigned int addrmax; | |
227 | bool no_share; | |
b4d30697 | 228 | enum ifla_vxlan_df df; |
0dfbdf41 TG |
229 | }; |
230 | ||
4095e0e1 NA |
231 | enum { |
232 | VXLAN_VNI_STATS_RX, | |
233 | VXLAN_VNI_STATS_RX_DROPS, | |
234 | VXLAN_VNI_STATS_RX_ERRORS, | |
235 | VXLAN_VNI_STATS_TX, | |
236 | VXLAN_VNI_STATS_TX_DROPS, | |
237 | VXLAN_VNI_STATS_TX_ERRORS, | |
238 | }; | |
239 | ||
240 | struct vxlan_vni_stats { | |
241 | u64 rx_packets; | |
242 | u64 rx_bytes; | |
243 | u64 rx_drops; | |
244 | u64 rx_errors; | |
245 | u64 tx_packets; | |
246 | u64 tx_bytes; | |
247 | u64 tx_drops; | |
248 | u64 tx_errors; | |
249 | }; | |
250 | ||
251 | struct vxlan_vni_stats_pcpu { | |
252 | struct vxlan_vni_stats stats; | |
253 | struct u64_stats_sync syncp; | |
254 | }; | |
255 | ||
69e76661 JB |
256 | struct vxlan_dev_node { |
257 | struct hlist_node hlist; | |
258 | struct vxlan_dev *vxlan; | |
259 | }; | |
260 | ||
f9c4bb0b RP |
261 | struct vxlan_vni_node { |
262 | struct rhash_head vnode; | |
263 | struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */ | |
264 | #if IS_ENABLED(CONFIG_IPV6) | |
265 | struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */ | |
266 | #endif | |
267 | struct list_head vlist; | |
268 | __be32 vni; | |
269 | union vxlan_addr remote_ip; /* default remote ip for this vni */ | |
4095e0e1 | 270 | struct vxlan_vni_stats_pcpu __percpu *stats; |
f9c4bb0b RP |
271 | |
272 | struct rcu_head rcu; | |
273 | }; | |
274 | ||
275 | struct vxlan_vni_group { | |
276 | struct rhashtable vni_hash; | |
277 | struct list_head vni_list; | |
278 | u32 num_vnis; | |
279 | }; | |
280 | ||
0dfbdf41 TG |
281 | /* Pseudo network device */ |
282 | struct vxlan_dev { | |
69e76661 JB |
283 | struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */ |
284 | #if IS_ENABLED(CONFIG_IPV6) | |
285 | struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */ | |
286 | #endif | |
0dfbdf41 | 287 | struct list_head next; /* vxlan's per namespace list */ |
c6fcc4fc | 288 | struct vxlan_sock __rcu *vn4_sock; /* listening socket for IPv4 */ |
b1be00a6 | 289 | #if IS_ENABLED(CONFIG_IPV6) |
c6fcc4fc | 290 | struct vxlan_sock __rcu *vn6_sock; /* listening socket for IPv6 */ |
b1be00a6 | 291 | #endif |
0dfbdf41 TG |
292 | struct net_device *dev; |
293 | struct net *net; /* netns for packet i/o */ | |
294 | struct vxlan_rdst default_dst; /* default destination */ | |
0dfbdf41 TG |
295 | |
296 | struct timer_list age_timer; | |
fe1e0713 | 297 | spinlock_t hash_lock[FDB_HASH_SIZE]; |
0dfbdf41 | 298 | unsigned int addrcnt; |
58ce31cc | 299 | struct gro_cells gro_cells; |
0dfbdf41 TG |
300 | |
301 | struct vxlan_config cfg; | |
302 | ||
f9c4bb0b RP |
303 | struct vxlan_vni_group __rcu *vnigrp; |
304 | ||
0dfbdf41 | 305 | struct hlist_head fdb_head[FDB_HASH_SIZE]; |
a3a48de5 IS |
306 | |
307 | struct rhashtable mdb_tbl; | |
308 | struct hlist_head mdb_list; | |
309 | unsigned int mdb_seq; | |
0dfbdf41 TG |
310 | }; |
311 | ||
359a0ea9 TH |
312 | #define VXLAN_F_LEARN 0x01 |
313 | #define VXLAN_F_PROXY 0x02 | |
314 | #define VXLAN_F_RSC 0x04 | |
315 | #define VXLAN_F_L2MISS 0x08 | |
316 | #define VXLAN_F_L3MISS 0x10 | |
317 | #define VXLAN_F_IPV6 0x20 | |
6ceb31ca | 318 | #define VXLAN_F_UDP_ZERO_CSUM_TX 0x40 |
359a0ea9 TH |
319 | #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80 |
320 | #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100 | |
dfd8645e TH |
321 | #define VXLAN_F_REMCSUM_TX 0x200 |
322 | #define VXLAN_F_REMCSUM_RX 0x400 | |
3511494c | 323 | #define VXLAN_F_GBP 0x800 |
0ace2ca8 | 324 | #define VXLAN_F_REMCSUM_NOPARTIAL 0x1000 |
ee122c79 | 325 | #define VXLAN_F_COLLECT_METADATA 0x2000 |
e1e5314d | 326 | #define VXLAN_F_GPE 0x4000 |
0f22a3c6 | 327 | #define VXLAN_F_IPV6_LINKLOCAL 0x8000 |
72f6d71e | 328 | #define VXLAN_F_TTL_INHERIT 0x10000 |
f9c4bb0b | 329 | #define VXLAN_F_VNIFILTER 0x20000 |
bc6c6b01 | 330 | #define VXLAN_F_MDB 0x40000 |
359a0ea9 | 331 | |
d299ce14 | 332 | /* Flags that are used in the receive path. These flags must match in |
af33c1ad TH |
333 | * order for a socket to be shareable |
334 | */ | |
335 | #define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \ | |
e1e5314d | 336 | VXLAN_F_GPE | \ |
af33c1ad | 337 | VXLAN_F_UDP_ZERO_CSUM6_RX | \ |
0ace2ca8 | 338 | VXLAN_F_REMCSUM_RX | \ |
ee122c79 | 339 | VXLAN_F_REMCSUM_NOPARTIAL | \ |
f9c4bb0b RP |
340 | VXLAN_F_COLLECT_METADATA | \ |
341 | VXLAN_F_VNIFILTER) | |
ac5132d1 | 342 | |
e1e5314d JB |
343 | /* Flags that can be set together with VXLAN_F_GPE. */ |
344 | #define VXLAN_F_ALLOWED_GPE (VXLAN_F_GPE | \ | |
345 | VXLAN_F_IPV6 | \ | |
0f22a3c6 | 346 | VXLAN_F_IPV6_LINKLOCAL | \ |
e1e5314d JB |
347 | VXLAN_F_UDP_ZERO_CSUM_TX | \ |
348 | VXLAN_F_UDP_ZERO_CSUM6_TX | \ | |
349 | VXLAN_F_UDP_ZERO_CSUM6_RX | \ | |
f9c4bb0b RP |
350 | VXLAN_F_COLLECT_METADATA | \ |
351 | VXLAN_F_VNIFILTER) | |
e1e5314d | 352 | |
0dfbdf41 TG |
353 | struct net_device *vxlan_dev_create(struct net *net, const char *name, |
354 | u8 name_assign_type, struct vxlan_config *conf); | |
355 | ||
5f35227e JG |
356 | static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, |
357 | netdev_features_t features) | |
11bf7828 | 358 | { |
5f35227e JG |
359 | u8 l4_hdr = 0; |
360 | ||
361 | if (!skb->encapsulation) | |
362 | return features; | |
363 | ||
364 | switch (vlan_get_protocol(skb)) { | |
365 | case htons(ETH_P_IP): | |
366 | l4_hdr = ip_hdr(skb)->protocol; | |
367 | break; | |
368 | case htons(ETH_P_IPV6): | |
369 | l4_hdr = ipv6_hdr(skb)->nexthdr; | |
370 | break; | |
371 | default: | |
5ef7e0ba | 372 | return features; |
5f35227e JG |
373 | } |
374 | ||
375 | if ((l4_hdr == IPPROTO_UDP) && | |
11bf7828 JS |
376 | (skb->inner_protocol_type != ENCAP_TYPE_ETHER || |
377 | skb->inner_protocol != htons(ETH_P_TEB) || | |
378 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != | |
af67eb9e AD |
379 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)) || |
380 | (skb->ip_summed != CHECKSUM_NONE && | |
381 | !can_checksum_protocol(features, inner_eth_hdr(skb)->h_proto)))) | |
a188222b | 382 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
11bf7828 | 383 | |
5f35227e | 384 | return features; |
11bf7828 | 385 | } |
23e62de3 | 386 | |
e6cd988c JG |
387 | /* IP header + UDP + VXLAN + Ethernet header */ |
388 | #define VXLAN_HEADROOM (20 + 8 + 8 + 14) | |
389 | /* IPv6 header + UDP + VXLAN + Ethernet header */ | |
390 | #define VXLAN6_HEADROOM (40 + 8 + 8 + 14) | |
391 | ||
d4ac05ff JB |
392 | static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb) |
393 | { | |
394 | return (struct vxlanhdr *)(udp_hdr(skb) + 1); | |
395 | } | |
396 | ||
54bfd872 JB |
397 | static inline __be32 vxlan_vni(__be32 vni_field) |
398 | { | |
399 | #if defined(__BIG_ENDIAN) | |
5692d7ea | 400 | return (__force __be32)((__force u32)vni_field >> 8); |
54bfd872 | 401 | #else |
5692d7ea | 402 | return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8); |
54bfd872 JB |
403 | #endif |
404 | } | |
405 | ||
406 | static inline __be32 vxlan_vni_field(__be32 vni) | |
407 | { | |
408 | #if defined(__BIG_ENDIAN) | |
5692d7ea | 409 | return (__force __be32)((__force u32)vni << 8); |
54bfd872 | 410 | #else |
5692d7ea | 411 | return (__force __be32)((__force u32)vni >> 8); |
54bfd872 JB |
412 | #endif |
413 | } | |
414 | ||
54bfd872 JB |
415 | static inline size_t vxlan_rco_start(__be32 vni_field) |
416 | { | |
417 | return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; | |
418 | } | |
419 | ||
420 | static inline size_t vxlan_rco_offset(__be32 vni_field) | |
421 | { | |
422 | return (vni_field & VXLAN_RCO_UDP) ? | |
423 | offsetof(struct udphdr, check) : | |
424 | offsetof(struct tcphdr, check); | |
425 | } | |
426 | ||
427 | static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset) | |
428 | { | |
429 | __be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT); | |
430 | ||
431 | if (offset == offsetof(struct udphdr, check)) | |
432 | vni_field |= VXLAN_RCO_UDP; | |
433 | return vni_field; | |
434 | } | |
435 | ||
705cc62f JB |
436 | static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs) |
437 | { | |
438 | return vs->sock->sk->sk_family; | |
439 | } | |
48e92c44 | 440 | |
cca45e05 IS |
441 | #if IS_ENABLED(CONFIG_IPV6) |
442 | ||
443 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
444 | { | |
445 | if (ipa->sa.sa_family == AF_INET6) | |
446 | return ipv6_addr_any(&ipa->sin6.sin6_addr); | |
447 | else | |
448 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
449 | } | |
450 | ||
451 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
452 | { | |
453 | if (ipa->sa.sa_family == AF_INET6) | |
454 | return ipv6_addr_is_multicast(&ipa->sin6.sin6_addr); | |
455 | else | |
842841ec | 456 | return ipv4_is_multicast(ipa->sin.sin_addr.s_addr); |
cca45e05 IS |
457 | } |
458 | ||
459 | #else /* !IS_ENABLED(CONFIG_IPV6) */ | |
460 | ||
461 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) | |
462 | { | |
463 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); | |
464 | } | |
465 | ||
466 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) | |
467 | { | |
842841ec | 468 | return ipv4_is_multicast(ipa->sin.sin_addr.s_addr); |
cca45e05 IS |
469 | } |
470 | ||
471 | #endif /* IS_ENABLED(CONFIG_IPV6) */ | |
472 | ||
5ff4ff4f IS |
473 | static inline bool netif_is_vxlan(const struct net_device *dev) |
474 | { | |
475 | return dev->rtnl_link_ops && | |
476 | !strcmp(dev->rtnl_link_ops->kind, "vxlan"); | |
477 | } | |
478 | ||
9a997353 PM |
479 | struct switchdev_notifier_vxlan_fdb_info { |
480 | struct switchdev_notifier_info info; /* must be first */ | |
481 | union vxlan_addr remote_ip; | |
482 | __be16 remote_port; | |
483 | __be32 remote_vni; | |
484 | u32 remote_ifindex; | |
485 | u8 eth_addr[ETH_ALEN]; | |
486 | __be32 vni; | |
0efe1173 | 487 | bool offloaded; |
45598c1c | 488 | bool added_by_user; |
9a997353 PM |
489 | }; |
490 | ||
1941f1d6 PM |
491 | #if IS_ENABLED(CONFIG_VXLAN) |
492 | int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, | |
493 | struct switchdev_notifier_vxlan_fdb_info *fdb_info); | |
4f89f5b5 | 494 | int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, |
4c59b7d1 PM |
495 | struct notifier_block *nb, |
496 | struct netlink_ext_ack *extack); | |
e5ff4b19 | 497 | void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni); |
4f89f5b5 | 498 | |
1941f1d6 PM |
499 | #else |
500 | static inline int | |
501 | vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, | |
502 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) | |
503 | { | |
504 | return -ENOENT; | |
505 | } | |
4f89f5b5 PM |
506 | |
507 | static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, | |
4c59b7d1 PM |
508 | struct notifier_block *nb, |
509 | struct netlink_ext_ack *extack) | |
4f89f5b5 PM |
510 | { |
511 | return -EOPNOTSUPP; | |
512 | } | |
e5ff4b19 PM |
513 | |
514 | static inline void | |
515 | vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni) | |
516 | { | |
517 | } | |
1941f1d6 PM |
518 | #endif |
519 | ||
70fb0828 RP |
520 | static inline void vxlan_flag_attr_error(int attrtype, |
521 | struct netlink_ext_ack *extack) | |
522 | { | |
523 | #define VXLAN_FLAG(flg) \ | |
524 | case IFLA_VXLAN_##flg: \ | |
525 | NL_SET_ERR_MSG_MOD(extack, \ | |
526 | "cannot change " #flg " flag"); \ | |
527 | break | |
528 | switch (attrtype) { | |
529 | VXLAN_FLAG(TTL_INHERIT); | |
530 | VXLAN_FLAG(LEARNING); | |
531 | VXLAN_FLAG(PROXY); | |
532 | VXLAN_FLAG(RSC); | |
533 | VXLAN_FLAG(L2MISS); | |
534 | VXLAN_FLAG(L3MISS); | |
535 | VXLAN_FLAG(COLLECT_METADATA); | |
536 | VXLAN_FLAG(UDP_ZERO_CSUM6_TX); | |
537 | VXLAN_FLAG(UDP_ZERO_CSUM6_RX); | |
538 | VXLAN_FLAG(REMCSUM_TX); | |
539 | VXLAN_FLAG(REMCSUM_RX); | |
540 | VXLAN_FLAG(GBP); | |
541 | VXLAN_FLAG(GPE); | |
542 | VXLAN_FLAG(REMCSUM_NOPARTIAL); | |
543 | default: | |
544 | NL_SET_ERR_MSG_MOD(extack, \ | |
545 | "cannot change flag"); | |
546 | break; | |
547 | } | |
548 | #undef VXLAN_FLAG | |
549 | } | |
550 | ||
1274e1cc RP |
551 | static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh, |
552 | int hash, | |
553 | struct vxlan_rdst *rdst) | |
554 | { | |
555 | struct fib_nh_common *nhc; | |
556 | ||
557 | nhc = nexthop_path_fdb_result(nh, hash); | |
558 | if (unlikely(!nhc)) | |
559 | return false; | |
560 | ||
561 | switch (nhc->nhc_gw_family) { | |
562 | case AF_INET: | |
563 | rdst->remote_ip.sin.sin_addr.s_addr = nhc->nhc_gw.ipv4; | |
564 | rdst->remote_ip.sa.sa_family = AF_INET; | |
565 | break; | |
566 | case AF_INET6: | |
567 | rdst->remote_ip.sin6.sin6_addr = nhc->nhc_gw.ipv6; | |
568 | rdst->remote_ip.sa.sa_family = AF_INET6; | |
569 | break; | |
570 | } | |
571 | ||
572 | return true; | |
573 | } | |
574 | ||
c641e927 GL |
575 | static inline void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, const struct vxlan_metadata *md) |
576 | { | |
577 | struct vxlanhdr_gbp *gbp; | |
578 | ||
579 | if (!md->gbp) | |
580 | return; | |
581 | ||
582 | gbp = (struct vxlanhdr_gbp *)vxh; | |
583 | vxh->vx_flags |= VXLAN_HF_GBP; | |
584 | ||
585 | if (md->gbp & VXLAN_GBP_DONT_LEARN) | |
586 | gbp->dont_learn = 1; | |
587 | ||
588 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) | |
589 | gbp->policy_applied = 1; | |
590 | ||
591 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); | |
592 | } | |
593 | ||
48e92c44 | 594 | #endif |