1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef __NET_VXLAN_H |
3 | #define __NET_VXLAN_H 1 |
4 | |
5 | #include <linux/if_vlan.h> |
6 | #include <linux/rhashtable-types.h> |
7 | #include <net/udp_tunnel.h> |
8 | #include <net/dst_metadata.h> |
9 | #include <net/rtnetlink.h> |
10 | #include <net/switchdev.h> |
11 | #include <net/nexthop.h> |
12 | |
13 | #define IANA_VXLAN_UDP_PORT 4789 |
14 | #define IANA_VXLAN_GPE_UDP_PORT 4790 |
15 | |
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. */ |
31 | #define VXLAN_HF_VNI cpu_to_be32(BIT(27)) |
32 | |
33 | #define VXLAN_N_VID (1u << 24) |
34 | #define VXLAN_VID_MASK (VXLAN_N_VID - 1) |
35 | #define VXLAN_VNI_MASK cpu_to_be32(VXLAN_VID_MASK << 8) |
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. */ |
62 | #define VXLAN_HF_RCO cpu_to_be32(BIT(21)) |
63 | |
64 | /* Remote checksum offload header option */ |
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 */ |
68 | #define VXLAN_RCO_SHIFT_MASK ((1 << VXLAN_RCO_SHIFT) - 1) |
69 | #define VXLAN_MAX_REMCSUM_START (0x7f << VXLAN_RCO_SHIFT) |
70 | |
71 | /* |
72 | * VXLAN Group Based Policy Extension (VXLAN_F_GBP): |
73 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
74 | * |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | |
75 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
76 | * | VXLAN Network Identifier (VNI) | Reserved | |
77 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
78 | * |
79 | * G = Group Policy ID present. |
80 | * |
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 | * |
88 | * https://tools.ietf.org/html/draft-smith-vxlan-group-policy |
89 | */ |
90 | struct vxlanhdr_gbp { |
91 | u8 vx_flags; |
92 | #ifdef __LITTLE_ENDIAN_BITFIELD |
93 | u8 reserved_flags1:3, |
94 | policy_applied:1, |
95 | reserved_flags2:2, |
96 | dont_learn:1, |
97 | reserved_flags3:1; |
98 | #elif defined(__BIG_ENDIAN_BITFIELD) |
99 | u8 reserved_flags1:1, |
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 | |
111 | /* VXLAN-GBP header flags. */ |
112 | #define VXLAN_HF_GBP cpu_to_be32(BIT(31)) |
113 | |
114 | #define VXLAN_GBP_USED_BITS (VXLAN_HF_GBP | cpu_to_be32(0xFFFFFF)) |
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 | |
126 | #define VXLAN_GBP_MASK (VXLAN_GBP_DONT_LEARN | VXLAN_GBP_POLICY_APPLIED | \ |
127 | VXLAN_GBP_ID_MASK) |
128 | |
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, |
158 | reserved_flags2:2; |
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 | |
181 | struct vxlan_metadata { |
182 | u32 gbp; |
183 | }; |
184 | |
185 | /* per UDP socket information */ |
186 | struct vxlan_sock { |
187 | struct hlist_node hlist; |
188 | struct socket *sock; |
189 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
190 | refcount_t refcnt; |
191 | u32 flags; |
192 | }; |
193 | |
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; |
203 | u8 offloaded:1; |
204 | __be32 remote_vni; |
205 | u32 remote_ifindex; |
206 | struct net_device *remote_dev; |
207 | struct list_head list; |
208 | struct rcu_head rcu; |
209 | struct dst_cache dst_cache; |
210 | }; |
211 | |
212 | struct vxlan_config { |
213 | union vxlan_addr remote_ip; |
214 | union vxlan_addr saddr; |
215 | __be32 vni; |
216 | int remote_ifindex; |
217 | int mtu; |
218 | __be16 dst_port; |
219 | u16 port_min; |
220 | u16 port_max; |
221 | u8 tos; |
222 | u8 ttl; |
223 | __be32 label; |
224 | u32 flags; |
225 | unsigned long age_interval; |
226 | unsigned int addrmax; |
227 | bool no_share; |
228 | enum ifla_vxlan_df df; |
229 | }; |
230 | |
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 | |
256 | struct vxlan_dev_node { |
257 | struct hlist_node hlist; |
258 | struct vxlan_dev *vxlan; |
259 | }; |
260 | |
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 */ |
270 | struct vxlan_vni_stats_pcpu __percpu *stats; |
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 | |
281 | /* Pseudo network device */ |
282 | struct vxlan_dev { |
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 |
287 | struct list_head next; /* vxlan's per namespace list */ |
288 | struct vxlan_sock __rcu *vn4_sock; /* listening socket for IPv4 */ |
289 | #if IS_ENABLED(CONFIG_IPV6) |
290 | struct vxlan_sock __rcu *vn6_sock; /* listening socket for IPv6 */ |
291 | #endif |
292 | struct net_device *dev; |
293 | struct net *net; /* netns for packet i/o */ |
294 | struct vxlan_rdst default_dst; /* default destination */ |
295 | |
296 | struct timer_list age_timer; |
297 | spinlock_t hash_lock[FDB_HASH_SIZE]; |
298 | unsigned int addrcnt; |
299 | struct gro_cells gro_cells; |
300 | |
301 | struct vxlan_config cfg; |
302 | |
303 | struct vxlan_vni_group __rcu *vnigrp; |
304 | |
305 | struct hlist_head fdb_head[FDB_HASH_SIZE]; |
306 | |
307 | struct rhashtable mdb_tbl; |
308 | struct hlist_head mdb_list; |
309 | unsigned int mdb_seq; |
310 | }; |
311 | |
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 |
318 | #define VXLAN_F_UDP_ZERO_CSUM_TX 0x40 |
319 | #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80 |
320 | #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100 |
321 | #define VXLAN_F_REMCSUM_TX 0x200 |
322 | #define VXLAN_F_REMCSUM_RX 0x400 |
323 | #define VXLAN_F_GBP 0x800 |
324 | #define VXLAN_F_REMCSUM_NOPARTIAL 0x1000 |
325 | #define VXLAN_F_COLLECT_METADATA 0x2000 |
326 | #define VXLAN_F_GPE 0x4000 |
327 | #define VXLAN_F_IPV6_LINKLOCAL 0x8000 |
328 | #define VXLAN_F_TTL_INHERIT 0x10000 |
329 | #define VXLAN_F_VNIFILTER 0x20000 |
330 | #define VXLAN_F_MDB 0x40000 |
331 | #define VXLAN_F_LOCALBYPASS 0x80000 |
332 | |
333 | /* Flags that are used in the receive path. These flags must match in |
334 | * order for a socket to be shareable |
335 | */ |
336 | #define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \ |
337 | VXLAN_F_GPE | \ |
338 | VXLAN_F_UDP_ZERO_CSUM6_RX | \ |
339 | VXLAN_F_REMCSUM_RX | \ |
340 | VXLAN_F_REMCSUM_NOPARTIAL | \ |
341 | VXLAN_F_COLLECT_METADATA | \ |
342 | VXLAN_F_VNIFILTER) |
343 | |
344 | /* Flags that can be set together with VXLAN_F_GPE. */ |
345 | #define VXLAN_F_ALLOWED_GPE (VXLAN_F_GPE | \ |
346 | VXLAN_F_IPV6 | \ |
347 | VXLAN_F_IPV6_LINKLOCAL | \ |
348 | VXLAN_F_UDP_ZERO_CSUM_TX | \ |
349 | VXLAN_F_UDP_ZERO_CSUM6_TX | \ |
350 | VXLAN_F_UDP_ZERO_CSUM6_RX | \ |
351 | VXLAN_F_COLLECT_METADATA | \ |
352 | VXLAN_F_VNIFILTER | \ |
353 | VXLAN_F_LOCALBYPASS) |
354 | |
355 | struct net_device *vxlan_dev_create(struct net *net, const char *name, |
356 | u8 name_assign_type, struct vxlan_config *conf); |
357 | |
358 | static inline netdev_features_t vxlan_features_check(struct sk_buff *skb, |
359 | netdev_features_t features) |
360 | { |
361 | u8 l4_hdr = 0; |
362 | |
363 | if (!skb->encapsulation) |
364 | return features; |
365 | |
366 | switch (vlan_get_protocol(skb)) { |
367 | case htons(ETH_P_IP): |
368 | l4_hdr = ip_hdr(skb)->protocol; |
369 | break; |
370 | case htons(ETH_P_IPV6): |
371 | l4_hdr = ipv6_hdr(skb)->nexthdr; |
372 | break; |
373 | default: |
374 | return features; |
375 | } |
376 | |
377 | if ((l4_hdr == IPPROTO_UDP) && |
378 | (skb->inner_protocol_type != ENCAP_TYPE_ETHER || |
379 | skb->inner_protocol != htons(ETH_P_TEB) || |
380 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != |
381 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)) || |
382 | (skb->ip_summed != CHECKSUM_NONE && |
383 | !can_checksum_protocol(features, protocol: inner_eth_hdr(skb)->h_proto)))) |
384 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
385 | |
386 | return features; |
387 | } |
388 | |
389 | static inline int vxlan_headroom(u32 flags) |
390 | { |
391 | /* VXLAN: IP4/6 header + UDP + VXLAN + Ethernet header */ |
392 | /* VXLAN-GPE: IP4/6 header + UDP + VXLAN */ |
393 | return (flags & VXLAN_F_IPV6 ? sizeof(struct ipv6hdr) : |
394 | sizeof(struct iphdr)) + |
395 | sizeof(struct udphdr) + sizeof(struct vxlanhdr) + |
396 | (flags & VXLAN_F_GPE ? 0 : ETH_HLEN); |
397 | } |
398 | |
399 | static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb) |
400 | { |
401 | return (struct vxlanhdr *)(udp_hdr(skb) + 1); |
402 | } |
403 | |
404 | static inline __be32 vxlan_vni(__be32 vni_field) |
405 | { |
406 | #if defined(__BIG_ENDIAN) |
407 | return (__force __be32)((__force u32)vni_field >> 8); |
408 | #else |
409 | return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8); |
410 | #endif |
411 | } |
412 | |
413 | static inline __be32 vxlan_vni_field(__be32 vni) |
414 | { |
415 | #if defined(__BIG_ENDIAN) |
416 | return (__force __be32)((__force u32)vni << 8); |
417 | #else |
418 | return (__force __be32)((__force u32)vni >> 8); |
419 | #endif |
420 | } |
421 | |
422 | static inline size_t vxlan_rco_start(__be32 vni_field) |
423 | { |
424 | return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT; |
425 | } |
426 | |
427 | static inline size_t vxlan_rco_offset(__be32 vni_field) |
428 | { |
429 | return (vni_field & VXLAN_RCO_UDP) ? |
430 | offsetof(struct udphdr, check) : |
431 | offsetof(struct tcphdr, check); |
432 | } |
433 | |
434 | static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset) |
435 | { |
436 | __be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT); |
437 | |
438 | if (offset == offsetof(struct udphdr, check)) |
439 | vni_field |= VXLAN_RCO_UDP; |
440 | return vni_field; |
441 | } |
442 | |
443 | static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs) |
444 | { |
445 | return vs->sock->sk->sk_family; |
446 | } |
447 | |
448 | #if IS_ENABLED(CONFIG_IPV6) |
449 | |
450 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) |
451 | { |
452 | if (ipa->sa.sa_family == AF_INET6) |
453 | return ipv6_addr_any(a: &ipa->sin6.sin6_addr); |
454 | else |
455 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); |
456 | } |
457 | |
458 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) |
459 | { |
460 | if (ipa->sa.sa_family == AF_INET6) |
461 | return ipv6_addr_is_multicast(addr: &ipa->sin6.sin6_addr); |
462 | else |
463 | return ipv4_is_multicast(addr: ipa->sin.sin_addr.s_addr); |
464 | } |
465 | |
466 | #else /* !IS_ENABLED(CONFIG_IPV6) */ |
467 | |
468 | static inline bool vxlan_addr_any(const union vxlan_addr *ipa) |
469 | { |
470 | return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY); |
471 | } |
472 | |
473 | static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa) |
474 | { |
475 | return ipv4_is_multicast(ipa->sin.sin_addr.s_addr); |
476 | } |
477 | |
478 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
479 | |
480 | static inline bool netif_is_vxlan(const struct net_device *dev) |
481 | { |
482 | return dev->rtnl_link_ops && |
483 | !strcmp(dev->rtnl_link_ops->kind, "vxlan" ); |
484 | } |
485 | |
486 | struct switchdev_notifier_vxlan_fdb_info { |
487 | struct switchdev_notifier_info info; /* must be first */ |
488 | union vxlan_addr remote_ip; |
489 | __be16 remote_port; |
490 | __be32 remote_vni; |
491 | u32 remote_ifindex; |
492 | u8 eth_addr[ETH_ALEN]; |
493 | __be32 vni; |
494 | bool offloaded; |
495 | bool added_by_user; |
496 | }; |
497 | |
498 | #if IS_ENABLED(CONFIG_VXLAN) |
499 | int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, |
500 | struct switchdev_notifier_vxlan_fdb_info *fdb_info); |
501 | int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, |
502 | struct notifier_block *nb, |
503 | struct netlink_ext_ack *extack); |
504 | void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni); |
505 | |
506 | #else |
507 | static inline int |
508 | vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni, |
509 | struct switchdev_notifier_vxlan_fdb_info *fdb_info) |
510 | { |
511 | return -ENOENT; |
512 | } |
513 | |
514 | static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni, |
515 | struct notifier_block *nb, |
516 | struct netlink_ext_ack *extack) |
517 | { |
518 | return -EOPNOTSUPP; |
519 | } |
520 | |
521 | static inline void |
522 | vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni) |
523 | { |
524 | } |
525 | #endif |
526 | |
527 | static inline void vxlan_flag_attr_error(int attrtype, |
528 | struct netlink_ext_ack *extack) |
529 | { |
530 | #define VXLAN_FLAG(flg) \ |
531 | case IFLA_VXLAN_##flg: \ |
532 | NL_SET_ERR_MSG_MOD(extack, \ |
533 | "cannot change " #flg " flag"); \ |
534 | break |
535 | switch (attrtype) { |
536 | VXLAN_FLAG(TTL_INHERIT); |
537 | VXLAN_FLAG(LEARNING); |
538 | VXLAN_FLAG(PROXY); |
539 | VXLAN_FLAG(RSC); |
540 | VXLAN_FLAG(L2MISS); |
541 | VXLAN_FLAG(L3MISS); |
542 | VXLAN_FLAG(COLLECT_METADATA); |
543 | VXLAN_FLAG(UDP_ZERO_CSUM6_TX); |
544 | VXLAN_FLAG(UDP_ZERO_CSUM6_RX); |
545 | VXLAN_FLAG(REMCSUM_TX); |
546 | VXLAN_FLAG(REMCSUM_RX); |
547 | VXLAN_FLAG(GBP); |
548 | VXLAN_FLAG(GPE); |
549 | VXLAN_FLAG(REMCSUM_NOPARTIAL); |
550 | default: |
551 | NL_SET_ERR_MSG_MOD(extack, \ |
552 | "cannot change flag" ); |
553 | break; |
554 | } |
555 | #undef VXLAN_FLAG |
556 | } |
557 | |
558 | static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh, |
559 | u32 hash, |
560 | struct vxlan_rdst *rdst) |
561 | { |
562 | struct fib_nh_common *nhc; |
563 | |
564 | nhc = nexthop_path_fdb_result(nh, hash: hash >> 1); |
565 | if (unlikely(!nhc)) |
566 | return false; |
567 | |
568 | switch (nhc->nhc_gw_family) { |
569 | case AF_INET: |
570 | rdst->remote_ip.sin.sin_addr.s_addr = nhc->nhc_gw.ipv4; |
571 | rdst->remote_ip.sa.sa_family = AF_INET; |
572 | break; |
573 | case AF_INET6: |
574 | rdst->remote_ip.sin6.sin6_addr = nhc->nhc_gw.ipv6; |
575 | rdst->remote_ip.sa.sa_family = AF_INET6; |
576 | break; |
577 | } |
578 | |
579 | return true; |
580 | } |
581 | |
582 | static inline void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, const struct vxlan_metadata *md) |
583 | { |
584 | struct vxlanhdr_gbp *gbp; |
585 | |
586 | if (!md->gbp) |
587 | return; |
588 | |
589 | gbp = (struct vxlanhdr_gbp *)vxh; |
590 | vxh->vx_flags |= VXLAN_HF_GBP; |
591 | |
592 | if (md->gbp & VXLAN_GBP_DONT_LEARN) |
593 | gbp->dont_learn = 1; |
594 | |
595 | if (md->gbp & VXLAN_GBP_POLICY_APPLIED) |
596 | gbp->policy_applied = 1; |
597 | |
598 | gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK); |
599 | } |
600 | |
601 | #endif |
602 | |