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 */
25struct 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 */
90struct 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
151struct 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
181struct vxlan_metadata {
182 u32 gbp;
183};
184
185/* per UDP socket information */
186struct 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
194union vxlan_addr {
195 struct sockaddr_in sin;
196 struct sockaddr_in6 sin6;
197 struct sockaddr sa;
198};
199
200struct 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
212struct 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 enum ifla_vxlan_label_policy label_policy;
225 u32 flags;
226 unsigned long age_interval;
227 unsigned int addrmax;
228 bool no_share;
229 enum ifla_vxlan_df df;
230 struct vxlanhdr reserved_bits;
231};
232
233enum {
234 VXLAN_VNI_STATS_RX,
235 VXLAN_VNI_STATS_RX_DROPS,
236 VXLAN_VNI_STATS_RX_ERRORS,
237 VXLAN_VNI_STATS_TX,
238 VXLAN_VNI_STATS_TX_DROPS,
239 VXLAN_VNI_STATS_TX_ERRORS,
240};
241
242struct vxlan_vni_stats {
243 u64 rx_packets;
244 u64 rx_bytes;
245 u64 rx_drops;
246 u64 rx_errors;
247 u64 tx_packets;
248 u64 tx_bytes;
249 u64 tx_drops;
250 u64 tx_errors;
251};
252
253struct vxlan_vni_stats_pcpu {
254 struct vxlan_vni_stats stats;
255 struct u64_stats_sync syncp;
256};
257
258struct vxlan_dev_node {
259 struct hlist_node hlist;
260 struct vxlan_dev *vxlan;
261};
262
263struct vxlan_vni_node {
264 struct rhash_head vnode;
265 struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */
266#if IS_ENABLED(CONFIG_IPV6)
267 struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */
268#endif
269 struct list_head vlist;
270 __be32 vni;
271 union vxlan_addr remote_ip; /* default remote ip for this vni */
272 struct vxlan_vni_stats_pcpu __percpu *stats;
273
274 struct rcu_head rcu;
275};
276
277struct vxlan_vni_group {
278 struct rhashtable vni_hash;
279 struct list_head vni_list;
280 u32 num_vnis;
281};
282
283/* Pseudo network device */
284struct vxlan_dev {
285 struct vxlan_dev_node hlist4; /* vni hash table for IPv4 socket */
286#if IS_ENABLED(CONFIG_IPV6)
287 struct vxlan_dev_node hlist6; /* vni hash table for IPv6 socket */
288#endif
289 struct list_head next; /* vxlan's per namespace list */
290 struct vxlan_sock __rcu *vn4_sock; /* listening socket for IPv4 */
291#if IS_ENABLED(CONFIG_IPV6)
292 struct vxlan_sock __rcu *vn6_sock; /* listening socket for IPv6 */
293#endif
294 struct net_device *dev;
295 struct net *net; /* netns for packet i/o */
296 struct vxlan_rdst default_dst; /* default destination */
297
298 struct timer_list age_timer;
299 spinlock_t hash_lock;
300 unsigned int addrcnt;
301 struct gro_cells gro_cells;
302
303 struct vxlan_config cfg;
304
305 struct vxlan_vni_group __rcu *vnigrp;
306
307 struct rhashtable fdb_hash_tbl;
308
309 struct rhashtable mdb_tbl;
310 struct hlist_head fdb_list;
311 struct hlist_head mdb_list;
312 unsigned int mdb_seq;
313};
314
315#define VXLAN_F_LEARN 0x01
316#define VXLAN_F_PROXY 0x02
317#define VXLAN_F_RSC 0x04
318#define VXLAN_F_L2MISS 0x08
319#define VXLAN_F_L3MISS 0x10
320#define VXLAN_F_IPV6 0x20
321#define VXLAN_F_UDP_ZERO_CSUM_TX 0x40
322#define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80
323#define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100
324#define VXLAN_F_REMCSUM_TX 0x200
325#define VXLAN_F_REMCSUM_RX 0x400
326#define VXLAN_F_GBP 0x800
327#define VXLAN_F_REMCSUM_NOPARTIAL 0x1000
328#define VXLAN_F_COLLECT_METADATA 0x2000
329#define VXLAN_F_GPE 0x4000
330#define VXLAN_F_IPV6_LINKLOCAL 0x8000
331#define VXLAN_F_TTL_INHERIT 0x10000
332#define VXLAN_F_VNIFILTER 0x20000
333#define VXLAN_F_MDB 0x40000
334#define VXLAN_F_LOCALBYPASS 0x80000
335#define VXLAN_F_MC_ROUTE 0x100000
336
337/* Flags that are used in the receive path. These flags must match in
338 * order for a socket to be shareable
339 */
340#define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \
341 VXLAN_F_GPE | \
342 VXLAN_F_UDP_ZERO_CSUM6_RX | \
343 VXLAN_F_REMCSUM_RX | \
344 VXLAN_F_REMCSUM_NOPARTIAL | \
345 VXLAN_F_COLLECT_METADATA | \
346 VXLAN_F_VNIFILTER)
347
348/* Flags that can be set together with VXLAN_F_GPE. */
349#define VXLAN_F_ALLOWED_GPE (VXLAN_F_GPE | \
350 VXLAN_F_IPV6 | \
351 VXLAN_F_IPV6_LINKLOCAL | \
352 VXLAN_F_UDP_ZERO_CSUM_TX | \
353 VXLAN_F_UDP_ZERO_CSUM6_TX | \
354 VXLAN_F_UDP_ZERO_CSUM6_RX | \
355 VXLAN_F_COLLECT_METADATA | \
356 VXLAN_F_VNIFILTER | \
357 VXLAN_F_LOCALBYPASS | \
358 VXLAN_F_MC_ROUTE | \
359 0)
360
361struct net_device *vxlan_dev_create(struct net *net, const char *name,
362 u8 name_assign_type, struct vxlan_config *conf);
363
364static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
365 netdev_features_t features)
366{
367 u8 l4_hdr = 0;
368
369 if (!skb->encapsulation)
370 return features;
371
372 switch (vlan_get_protocol(skb)) {
373 case htons(ETH_P_IP):
374 l4_hdr = ip_hdr(skb)->protocol;
375 break;
376 case htons(ETH_P_IPV6):
377 l4_hdr = ipv6_hdr(skb)->nexthdr;
378 break;
379 default:
380 return features;
381 }
382
383 if ((l4_hdr == IPPROTO_UDP) &&
384 (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
385 skb->inner_protocol != htons(ETH_P_TEB) ||
386 (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
387 sizeof(struct udphdr) + sizeof(struct vxlanhdr)) ||
388 (skb->ip_summed != CHECKSUM_NONE &&
389 !can_checksum_protocol(features, protocol: inner_eth_hdr(skb)->h_proto))))
390 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
391
392 return features;
393}
394
395static inline int vxlan_headroom(u32 flags)
396{
397 /* VXLAN: IP4/6 header + UDP + VXLAN + Ethernet header */
398 /* VXLAN-GPE: IP4/6 header + UDP + VXLAN */
399 return (flags & VXLAN_F_IPV6 ? sizeof(struct ipv6hdr) :
400 sizeof(struct iphdr)) +
401 sizeof(struct udphdr) + sizeof(struct vxlanhdr) +
402 (flags & VXLAN_F_GPE ? 0 : ETH_HLEN);
403}
404
405static inline struct vxlanhdr *vxlan_hdr(struct sk_buff *skb)
406{
407 return (struct vxlanhdr *)(udp_hdr(skb) + 1);
408}
409
410static inline __be32 vxlan_vni(__be32 vni_field)
411{
412#if defined(__BIG_ENDIAN)
413 return (__force __be32)((__force u32)vni_field >> 8);
414#else
415 return (__force __be32)((__force u32)(vni_field & VXLAN_VNI_MASK) << 8);
416#endif
417}
418
419static inline __be32 vxlan_vni_field(__be32 vni)
420{
421#if defined(__BIG_ENDIAN)
422 return (__force __be32)((__force u32)vni << 8);
423#else
424 return (__force __be32)((__force u32)vni >> 8);
425#endif
426}
427
428static inline size_t vxlan_rco_start(__be32 vni_field)
429{
430 return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;
431}
432
433static inline size_t vxlan_rco_offset(__be32 vni_field)
434{
435 return (vni_field & VXLAN_RCO_UDP) ?
436 offsetof(struct udphdr, check) :
437 offsetof(struct tcphdr, check);
438}
439
440static inline __be32 vxlan_compute_rco(unsigned int start, unsigned int offset)
441{
442 __be32 vni_field = cpu_to_be32(start >> VXLAN_RCO_SHIFT);
443
444 if (offset == offsetof(struct udphdr, check))
445 vni_field |= VXLAN_RCO_UDP;
446 return vni_field;
447}
448
449static inline unsigned short vxlan_get_sk_family(struct vxlan_sock *vs)
450{
451 return vs->sock->sk->sk_family;
452}
453
454#if IS_ENABLED(CONFIG_IPV6)
455
456static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
457{
458 if (ipa->sa.sa_family == AF_INET6)
459 return ipv6_addr_any(a: &ipa->sin6.sin6_addr);
460 else
461 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
462}
463
464static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
465{
466 if (ipa->sa.sa_family == AF_INET6)
467 return ipv6_addr_is_multicast(addr: &ipa->sin6.sin6_addr);
468 else
469 return ipv4_is_multicast(addr: ipa->sin.sin_addr.s_addr);
470}
471
472#else /* !IS_ENABLED(CONFIG_IPV6) */
473
474static inline bool vxlan_addr_any(const union vxlan_addr *ipa)
475{
476 return ipa->sin.sin_addr.s_addr == htonl(INADDR_ANY);
477}
478
479static inline bool vxlan_addr_multicast(const union vxlan_addr *ipa)
480{
481 return ipv4_is_multicast(ipa->sin.sin_addr.s_addr);
482}
483
484#endif /* IS_ENABLED(CONFIG_IPV6) */
485
486static inline bool netif_is_vxlan(const struct net_device *dev)
487{
488 return dev->rtnl_link_ops &&
489 !strcmp(dev->rtnl_link_ops->kind, "vxlan");
490}
491
492struct switchdev_notifier_vxlan_fdb_info {
493 struct switchdev_notifier_info info; /* must be first */
494 union vxlan_addr remote_ip;
495 __be16 remote_port;
496 __be32 remote_vni;
497 u32 remote_ifindex;
498 u8 eth_addr[ETH_ALEN];
499 __be32 vni;
500 bool offloaded;
501 bool added_by_user;
502};
503
504#if IS_ENABLED(CONFIG_VXLAN)
505int vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
506 struct switchdev_notifier_vxlan_fdb_info *fdb_info);
507int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
508 struct notifier_block *nb,
509 struct netlink_ext_ack *extack);
510void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni);
511
512#else
513static inline int
514vxlan_fdb_find_uc(struct net_device *dev, const u8 *mac, __be32 vni,
515 struct switchdev_notifier_vxlan_fdb_info *fdb_info)
516{
517 return -ENOENT;
518}
519
520static inline int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
521 struct notifier_block *nb,
522 struct netlink_ext_ack *extack)
523{
524 return -EOPNOTSUPP;
525}
526
527static inline void
528vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
529{
530}
531#endif
532
533static inline void vxlan_flag_attr_error(int attrtype,
534 struct netlink_ext_ack *extack)
535{
536#define VXLAN_FLAG(flg) \
537 case IFLA_VXLAN_##flg: \
538 NL_SET_ERR_MSG_MOD(extack, \
539 "cannot change " #flg " flag"); \
540 break
541 switch (attrtype) {
542 VXLAN_FLAG(TTL_INHERIT);
543 VXLAN_FLAG(LEARNING);
544 VXLAN_FLAG(PROXY);
545 VXLAN_FLAG(RSC);
546 VXLAN_FLAG(L2MISS);
547 VXLAN_FLAG(L3MISS);
548 VXLAN_FLAG(COLLECT_METADATA);
549 VXLAN_FLAG(UDP_ZERO_CSUM6_TX);
550 VXLAN_FLAG(UDP_ZERO_CSUM6_RX);
551 VXLAN_FLAG(REMCSUM_TX);
552 VXLAN_FLAG(REMCSUM_RX);
553 VXLAN_FLAG(GBP);
554 VXLAN_FLAG(GPE);
555 VXLAN_FLAG(REMCSUM_NOPARTIAL);
556 default:
557 NL_SET_ERR_MSG_MOD(extack, \
558 "cannot change flag");
559 break;
560 }
561#undef VXLAN_FLAG
562}
563
564static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh,
565 u32 hash,
566 struct vxlan_rdst *rdst)
567{
568 struct fib_nh_common *nhc;
569
570 nhc = nexthop_path_fdb_result(nh, hash: hash >> 1);
571 if (unlikely(!nhc))
572 return false;
573
574 switch (nhc->nhc_gw_family) {
575 case AF_INET:
576 rdst->remote_ip.sin.sin_addr.s_addr = nhc->nhc_gw.ipv4;
577 rdst->remote_ip.sa.sa_family = AF_INET;
578 break;
579 case AF_INET6:
580 rdst->remote_ip.sin6.sin6_addr = nhc->nhc_gw.ipv6;
581 rdst->remote_ip.sa.sa_family = AF_INET6;
582 break;
583 }
584
585 return true;
586}
587
588static inline void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, const struct vxlan_metadata *md)
589{
590 struct vxlanhdr_gbp *gbp;
591
592 if (!md->gbp)
593 return;
594
595 gbp = (struct vxlanhdr_gbp *)vxh;
596 vxh->vx_flags |= VXLAN_HF_GBP;
597
598 if (md->gbp & VXLAN_GBP_DONT_LEARN)
599 gbp->dont_learn = 1;
600
601 if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
602 gbp->policy_applied = 1;
603
604 gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
605}
606
607#endif
608