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8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10#include <linux/ethtool.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/etherdevice.h>
14#include <linux/hash.h>
15#include <net/ipv6_stubs.h>
16#include <net/dst_metadata.h>
17#include <net/gro_cells.h>
18#include <net/rtnetlink.h>
19#include <net/geneve.h>
20#include <net/gro.h>
21#include <net/protocol.h>
22
23#define GENEVE_NETDEV_VER "0.6"
24
25#define GENEVE_N_VID (1u << 24)
26#define GENEVE_VID_MASK (GENEVE_N_VID - 1)
27
28#define VNI_HASH_BITS 10
29#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
30
31static bool log_ecn_error = true;
32module_param(log_ecn_error, bool, 0644);
33MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
34
35#define GENEVE_VER 0
36#define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr))
37#define GENEVE_IPV4_HLEN (ETH_HLEN + sizeof(struct iphdr) + GENEVE_BASE_HLEN)
38#define GENEVE_IPV6_HLEN (ETH_HLEN + sizeof(struct ipv6hdr) + GENEVE_BASE_HLEN)
39
40
41struct geneve_net {
42 struct list_head geneve_list;
43 struct list_head sock_list;
44};
45
46static unsigned int geneve_net_id;
47
48struct geneve_dev_node {
49 struct hlist_node hlist;
50 struct geneve_dev *geneve;
51};
52
53struct geneve_config {
54 struct ip_tunnel_info info;
55 bool collect_md;
56 bool use_udp6_rx_checksums;
57 bool ttl_inherit;
58 enum ifla_geneve_df df;
59};
60
61
62struct geneve_dev {
63 struct geneve_dev_node hlist4;
64#if IS_ENABLED(CONFIG_IPV6)
65 struct geneve_dev_node hlist6;
66#endif
67 struct net *net;
68 struct net_device *dev;
69 struct geneve_sock __rcu *sock4;
70#if IS_ENABLED(CONFIG_IPV6)
71 struct geneve_sock __rcu *sock6;
72#endif
73 struct list_head next;
74 struct gro_cells gro_cells;
75 struct geneve_config cfg;
76};
77
78struct geneve_sock {
79 bool collect_md;
80 struct list_head list;
81 struct socket *sock;
82 struct rcu_head rcu;
83 int refcnt;
84 struct hlist_head vni_list[VNI_HASH_SIZE];
85};
86
87static inline __u32 geneve_net_vni_hash(u8 vni[3])
88{
89 __u32 vnid;
90
91 vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2];
92 return hash_32(vnid, VNI_HASH_BITS);
93}
94
95static __be64 vni_to_tunnel_id(const __u8 *vni)
96{
97#ifdef __BIG_ENDIAN
98 return (vni[0] << 16) | (vni[1] << 8) | vni[2];
99#else
100 return (__force __be64)(((__force u64)vni[0] << 40) |
101 ((__force u64)vni[1] << 48) |
102 ((__force u64)vni[2] << 56));
103#endif
104}
105
106
107static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
108{
109#ifdef __BIG_ENDIAN
110 vni[0] = (__force __u8)(tun_id >> 16);
111 vni[1] = (__force __u8)(tun_id >> 8);
112 vni[2] = (__force __u8)tun_id;
113#else
114 vni[0] = (__force __u8)((__force u64)tun_id >> 40);
115 vni[1] = (__force __u8)((__force u64)tun_id >> 48);
116 vni[2] = (__force __u8)((__force u64)tun_id >> 56);
117#endif
118}
119
120static bool eq_tun_id_and_vni(u8 *tun_id, u8 *vni)
121{
122 return !memcmp(vni, &tun_id[5], 3);
123}
124
125static sa_family_t geneve_get_sk_family(struct geneve_sock *gs)
126{
127 return gs->sock->sk->sk_family;
128}
129
130static struct geneve_dev *geneve_lookup(struct geneve_sock *gs,
131 __be32 addr, u8 vni[])
132{
133 struct hlist_head *vni_list_head;
134 struct geneve_dev_node *node;
135 __u32 hash;
136
137
138 hash = geneve_net_vni_hash(vni);
139 vni_list_head = &gs->vni_list[hash];
140 hlist_for_each_entry_rcu(node, vni_list_head, hlist) {
141 if (eq_tun_id_and_vni((u8 *)&node->geneve->cfg.info.key.tun_id, vni) &&
142 addr == node->geneve->cfg.info.key.u.ipv4.dst)
143 return node->geneve;
144 }
145 return NULL;
146}
147
148#if IS_ENABLED(CONFIG_IPV6)
149static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs,
150 struct in6_addr addr6, u8 vni[])
151{
152 struct hlist_head *vni_list_head;
153 struct geneve_dev_node *node;
154 __u32 hash;
155
156
157 hash = geneve_net_vni_hash(vni);
158 vni_list_head = &gs->vni_list[hash];
159 hlist_for_each_entry_rcu(node, vni_list_head, hlist) {
160 if (eq_tun_id_and_vni((u8 *)&node->geneve->cfg.info.key.tun_id, vni) &&
161 ipv6_addr_equal(&addr6, &node->geneve->cfg.info.key.u.ipv6.dst))
162 return node->geneve;
163 }
164 return NULL;
165}
166#endif
167
168static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb)
169{
170 return (struct genevehdr *)(udp_hdr(skb) + 1);
171}
172
173static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs,
174 struct sk_buff *skb)
175{
176 static u8 zero_vni[3];
177 u8 *vni;
178
179 if (geneve_get_sk_family(gs) == AF_INET) {
180 struct iphdr *iph;
181 __be32 addr;
182
183 iph = ip_hdr(skb);
184
185 if (gs->collect_md) {
186 vni = zero_vni;
187 addr = 0;
188 } else {
189 vni = geneve_hdr(skb)->vni;
190 addr = iph->saddr;
191 }
192
193 return geneve_lookup(gs, addr, vni);
194#if IS_ENABLED(CONFIG_IPV6)
195 } else if (geneve_get_sk_family(gs) == AF_INET6) {
196 static struct in6_addr zero_addr6;
197 struct ipv6hdr *ip6h;
198 struct in6_addr addr6;
199
200 ip6h = ipv6_hdr(skb);
201
202 if (gs->collect_md) {
203 vni = zero_vni;
204 addr6 = zero_addr6;
205 } else {
206 vni = geneve_hdr(skb)->vni;
207 addr6 = ip6h->saddr;
208 }
209
210 return geneve6_lookup(gs, addr6, vni);
211#endif
212 }
213 return NULL;
214}
215
216
217static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs,
218 struct sk_buff *skb)
219{
220 struct genevehdr *gnvh = geneve_hdr(skb);
221 struct metadata_dst *tun_dst = NULL;
222 unsigned int len;
223 int err = 0;
224 void *oiph;
225
226 if (ip_tunnel_collect_metadata() || gs->collect_md) {
227 __be16 flags;
228
229 flags = TUNNEL_KEY | (gnvh->oam ? TUNNEL_OAM : 0) |
230 (gnvh->critical ? TUNNEL_CRIT_OPT : 0);
231
232 tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags,
233 vni_to_tunnel_id(gnvh->vni),
234 gnvh->opt_len * 4);
235 if (!tun_dst) {
236 geneve->dev->stats.rx_dropped++;
237 goto drop;
238 }
239
240 ip_tunnel_info_opts_set(&tun_dst->u.tun_info,
241 gnvh->options, gnvh->opt_len * 4,
242 TUNNEL_GENEVE_OPT);
243 } else {
244
245
246
247 if (gnvh->critical) {
248 geneve->dev->stats.rx_frame_errors++;
249 geneve->dev->stats.rx_errors++;
250 goto drop;
251 }
252 }
253
254 skb_reset_mac_header(skb);
255 skb->protocol = eth_type_trans(skb, geneve->dev);
256 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
257
258 if (tun_dst)
259 skb_dst_set(skb, &tun_dst->dst);
260
261
262 if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) {
263 geneve->dev->stats.rx_errors++;
264 goto drop;
265 }
266
267 oiph = skb_network_header(skb);
268 skb_reset_network_header(skb);
269
270 if (geneve_get_sk_family(gs) == AF_INET)
271 err = IP_ECN_decapsulate(oiph, skb);
272#if IS_ENABLED(CONFIG_IPV6)
273 else
274 err = IP6_ECN_decapsulate(oiph, skb);
275#endif
276
277 if (unlikely(err)) {
278 if (log_ecn_error) {
279 if (geneve_get_sk_family(gs) == AF_INET)
280 net_info_ratelimited("non-ECT from %pI4 "
281 "with TOS=%#x\n",
282 &((struct iphdr *)oiph)->saddr,
283 ((struct iphdr *)oiph)->tos);
284#if IS_ENABLED(CONFIG_IPV6)
285 else
286 net_info_ratelimited("non-ECT from %pI6\n",
287 &((struct ipv6hdr *)oiph)->saddr);
288#endif
289 }
290 if (err > 1) {
291 ++geneve->dev->stats.rx_frame_errors;
292 ++geneve->dev->stats.rx_errors;
293 goto drop;
294 }
295 }
296
297 len = skb->len;
298 err = gro_cells_receive(&geneve->gro_cells, skb);
299 if (likely(err == NET_RX_SUCCESS))
300 dev_sw_netstats_rx_add(geneve->dev, len);
301
302 return;
303drop:
304
305 kfree_skb(skb);
306}
307
308
309static int geneve_init(struct net_device *dev)
310{
311 struct geneve_dev *geneve = netdev_priv(dev);
312 int err;
313
314 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
315 if (!dev->tstats)
316 return -ENOMEM;
317
318 err = gro_cells_init(&geneve->gro_cells, dev);
319 if (err) {
320 free_percpu(dev->tstats);
321 return err;
322 }
323
324 err = dst_cache_init(&geneve->cfg.info.dst_cache, GFP_KERNEL);
325 if (err) {
326 free_percpu(dev->tstats);
327 gro_cells_destroy(&geneve->gro_cells);
328 return err;
329 }
330 return 0;
331}
332
333static void geneve_uninit(struct net_device *dev)
334{
335 struct geneve_dev *geneve = netdev_priv(dev);
336
337 dst_cache_destroy(&geneve->cfg.info.dst_cache);
338 gro_cells_destroy(&geneve->gro_cells);
339 free_percpu(dev->tstats);
340}
341
342
343static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
344{
345 struct genevehdr *geneveh;
346 struct geneve_dev *geneve;
347 struct geneve_sock *gs;
348 int opts_len;
349
350
351 if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN)))
352 goto drop;
353
354
355 geneveh = geneve_hdr(skb);
356 if (unlikely(geneveh->ver != GENEVE_VER))
357 goto drop;
358
359 if (unlikely(geneveh->proto_type != htons(ETH_P_TEB)))
360 goto drop;
361
362 gs = rcu_dereference_sk_user_data(sk);
363 if (!gs)
364 goto drop;
365
366 geneve = geneve_lookup_skb(gs, skb);
367 if (!geneve)
368 goto drop;
369
370 opts_len = geneveh->opt_len * 4;
371 if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len,
372 htons(ETH_P_TEB),
373 !net_eq(geneve->net, dev_net(geneve->dev)))) {
374 geneve->dev->stats.rx_dropped++;
375 goto drop;
376 }
377
378 geneve_rx(geneve, gs, skb);
379 return 0;
380
381drop:
382
383 kfree_skb(skb);
384 return 0;
385}
386
387
388static int geneve_udp_encap_err_lookup(struct sock *sk, struct sk_buff *skb)
389{
390 struct genevehdr *geneveh;
391 struct geneve_sock *gs;
392 u8 zero_vni[3] = { 0 };
393 u8 *vni = zero_vni;
394
395 if (!pskb_may_pull(skb, skb_transport_offset(skb) + GENEVE_BASE_HLEN))
396 return -EINVAL;
397
398 geneveh = geneve_hdr(skb);
399 if (geneveh->ver != GENEVE_VER)
400 return -EINVAL;
401
402 if (geneveh->proto_type != htons(ETH_P_TEB))
403 return -EINVAL;
404
405 gs = rcu_dereference_sk_user_data(sk);
406 if (!gs)
407 return -ENOENT;
408
409 if (geneve_get_sk_family(gs) == AF_INET) {
410 struct iphdr *iph = ip_hdr(skb);
411 __be32 addr4 = 0;
412
413 if (!gs->collect_md) {
414 vni = geneve_hdr(skb)->vni;
415 addr4 = iph->daddr;
416 }
417
418 return geneve_lookup(gs, addr4, vni) ? 0 : -ENOENT;
419 }
420
421#if IS_ENABLED(CONFIG_IPV6)
422 if (geneve_get_sk_family(gs) == AF_INET6) {
423 struct ipv6hdr *ip6h = ipv6_hdr(skb);
424 struct in6_addr addr6;
425
426 memset(&addr6, 0, sizeof(struct in6_addr));
427
428 if (!gs->collect_md) {
429 vni = geneve_hdr(skb)->vni;
430 addr6 = ip6h->daddr;
431 }
432
433 return geneve6_lookup(gs, addr6, vni) ? 0 : -ENOENT;
434 }
435#endif
436
437 return -EPFNOSUPPORT;
438}
439
440static struct socket *geneve_create_sock(struct net *net, bool ipv6,
441 __be16 port, bool ipv6_rx_csum)
442{
443 struct socket *sock;
444 struct udp_port_cfg udp_conf;
445 int err;
446
447 memset(&udp_conf, 0, sizeof(udp_conf));
448
449 if (ipv6) {
450 udp_conf.family = AF_INET6;
451 udp_conf.ipv6_v6only = 1;
452 udp_conf.use_udp6_rx_checksums = ipv6_rx_csum;
453 } else {
454 udp_conf.family = AF_INET;
455 udp_conf.local_ip.s_addr = htonl(INADDR_ANY);
456 }
457
458 udp_conf.local_udp_port = port;
459
460
461 err = udp_sock_create(net, &udp_conf, &sock);
462 if (err < 0)
463 return ERR_PTR(err);
464
465 udp_allow_gso(sock->sk);
466 return sock;
467}
468
469static int geneve_hlen(struct genevehdr *gh)
470{
471 return sizeof(*gh) + gh->opt_len * 4;
472}
473
474static struct sk_buff *geneve_gro_receive(struct sock *sk,
475 struct list_head *head,
476 struct sk_buff *skb)
477{
478 struct sk_buff *pp = NULL;
479 struct sk_buff *p;
480 struct genevehdr *gh, *gh2;
481 unsigned int hlen, gh_len, off_gnv;
482 const struct packet_offload *ptype;
483 __be16 type;
484 int flush = 1;
485
486 off_gnv = skb_gro_offset(skb);
487 hlen = off_gnv + sizeof(*gh);
488 gh = skb_gro_header_fast(skb, off_gnv);
489 if (skb_gro_header_hard(skb, hlen)) {
490 gh = skb_gro_header_slow(skb, hlen, off_gnv);
491 if (unlikely(!gh))
492 goto out;
493 }
494
495 if (gh->ver != GENEVE_VER || gh->oam)
496 goto out;
497 gh_len = geneve_hlen(gh);
498
499 hlen = off_gnv + gh_len;
500 if (skb_gro_header_hard(skb, hlen)) {
501 gh = skb_gro_header_slow(skb, hlen, off_gnv);
502 if (unlikely(!gh))
503 goto out;
504 }
505
506 list_for_each_entry(p, head, list) {
507 if (!NAPI_GRO_CB(p)->same_flow)
508 continue;
509
510 gh2 = (struct genevehdr *)(p->data + off_gnv);
511 if (gh->opt_len != gh2->opt_len ||
512 memcmp(gh, gh2, gh_len)) {
513 NAPI_GRO_CB(p)->same_flow = 0;
514 continue;
515 }
516 }
517
518 type = gh->proto_type;
519
520 ptype = gro_find_receive_by_type(type);
521 if (!ptype)
522 goto out;
523
524 skb_gro_pull(skb, gh_len);
525 skb_gro_postpull_rcsum(skb, gh, gh_len);
526 pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
527 flush = 0;
528
529out:
530 skb_gro_flush_final(skb, pp, flush);
531
532 return pp;
533}
534
535static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb,
536 int nhoff)
537{
538 struct genevehdr *gh;
539 struct packet_offload *ptype;
540 __be16 type;
541 int gh_len;
542 int err = -ENOSYS;
543
544 gh = (struct genevehdr *)(skb->data + nhoff);
545 gh_len = geneve_hlen(gh);
546 type = gh->proto_type;
547
548 ptype = gro_find_complete_by_type(type);
549 if (ptype)
550 err = ptype->callbacks.gro_complete(skb, nhoff + gh_len);
551
552 skb_set_inner_mac_header(skb, nhoff + gh_len);
553
554 return err;
555}
556
557
558static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port,
559 bool ipv6, bool ipv6_rx_csum)
560{
561 struct geneve_net *gn = net_generic(net, geneve_net_id);
562 struct geneve_sock *gs;
563 struct socket *sock;
564 struct udp_tunnel_sock_cfg tunnel_cfg;
565 int h;
566
567 gs = kzalloc(sizeof(*gs), GFP_KERNEL);
568 if (!gs)
569 return ERR_PTR(-ENOMEM);
570
571 sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum);
572 if (IS_ERR(sock)) {
573 kfree(gs);
574 return ERR_CAST(sock);
575 }
576
577 gs->sock = sock;
578 gs->refcnt = 1;
579 for (h = 0; h < VNI_HASH_SIZE; ++h)
580 INIT_HLIST_HEAD(&gs->vni_list[h]);
581
582
583 udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
584
585
586 memset(&tunnel_cfg, 0, sizeof(tunnel_cfg));
587 tunnel_cfg.sk_user_data = gs;
588 tunnel_cfg.encap_type = 1;
589 tunnel_cfg.gro_receive = geneve_gro_receive;
590 tunnel_cfg.gro_complete = geneve_gro_complete;
591 tunnel_cfg.encap_rcv = geneve_udp_encap_recv;
592 tunnel_cfg.encap_err_lookup = geneve_udp_encap_err_lookup;
593 tunnel_cfg.encap_destroy = NULL;
594 setup_udp_tunnel_sock(net, sock, &tunnel_cfg);
595 list_add(&gs->list, &gn->sock_list);
596 return gs;
597}
598
599static void __geneve_sock_release(struct geneve_sock *gs)
600{
601 if (!gs || --gs->refcnt)
602 return;
603
604 list_del(&gs->list);
605 udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE);
606 udp_tunnel_sock_release(gs->sock);
607 kfree_rcu(gs, rcu);
608}
609
610static void geneve_sock_release(struct geneve_dev *geneve)
611{
612 struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4);
613#if IS_ENABLED(CONFIG_IPV6)
614 struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6);
615
616 rcu_assign_pointer(geneve->sock6, NULL);
617#endif
618
619 rcu_assign_pointer(geneve->sock4, NULL);
620 synchronize_net();
621
622 __geneve_sock_release(gs4);
623#if IS_ENABLED(CONFIG_IPV6)
624 __geneve_sock_release(gs6);
625#endif
626}
627
628static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
629 sa_family_t family,
630 __be16 dst_port)
631{
632 struct geneve_sock *gs;
633
634 list_for_each_entry(gs, &gn->sock_list, list) {
635 if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
636 geneve_get_sk_family(gs) == family) {
637 return gs;
638 }
639 }
640 return NULL;
641}
642
643static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6)
644{
645 struct net *net = geneve->net;
646 struct geneve_net *gn = net_generic(net, geneve_net_id);
647 struct geneve_dev_node *node;
648 struct geneve_sock *gs;
649 __u8 vni[3];
650 __u32 hash;
651
652 gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->cfg.info.key.tp_dst);
653 if (gs) {
654 gs->refcnt++;
655 goto out;
656 }
657
658 gs = geneve_socket_create(net, geneve->cfg.info.key.tp_dst, ipv6,
659 geneve->cfg.use_udp6_rx_checksums);
660 if (IS_ERR(gs))
661 return PTR_ERR(gs);
662
663out:
664 gs->collect_md = geneve->cfg.collect_md;
665#if IS_ENABLED(CONFIG_IPV6)
666 if (ipv6) {
667 rcu_assign_pointer(geneve->sock6, gs);
668 node = &geneve->hlist6;
669 } else
670#endif
671 {
672 rcu_assign_pointer(geneve->sock4, gs);
673 node = &geneve->hlist4;
674 }
675 node->geneve = geneve;
676
677 tunnel_id_to_vni(geneve->cfg.info.key.tun_id, vni);
678 hash = geneve_net_vni_hash(vni);
679 hlist_add_head_rcu(&node->hlist, &gs->vni_list[hash]);
680 return 0;
681}
682
683static int geneve_open(struct net_device *dev)
684{
685 struct geneve_dev *geneve = netdev_priv(dev);
686 bool metadata = geneve->cfg.collect_md;
687 bool ipv4, ipv6;
688 int ret = 0;
689
690 ipv6 = geneve->cfg.info.mode & IP_TUNNEL_INFO_IPV6 || metadata;
691 ipv4 = !ipv6 || metadata;
692#if IS_ENABLED(CONFIG_IPV6)
693 if (ipv6) {
694 ret = geneve_sock_add(geneve, true);
695 if (ret < 0 && ret != -EAFNOSUPPORT)
696 ipv4 = false;
697 }
698#endif
699 if (ipv4)
700 ret = geneve_sock_add(geneve, false);
701 if (ret < 0)
702 geneve_sock_release(geneve);
703
704 return ret;
705}
706
707static int geneve_stop(struct net_device *dev)
708{
709 struct geneve_dev *geneve = netdev_priv(dev);
710
711 hlist_del_init_rcu(&geneve->hlist4.hlist);
712#if IS_ENABLED(CONFIG_IPV6)
713 hlist_del_init_rcu(&geneve->hlist6.hlist);
714#endif
715 geneve_sock_release(geneve);
716 return 0;
717}
718
719static void geneve_build_header(struct genevehdr *geneveh,
720 const struct ip_tunnel_info *info)
721{
722 geneveh->ver = GENEVE_VER;
723 geneveh->opt_len = info->options_len / 4;
724 geneveh->oam = !!(info->key.tun_flags & TUNNEL_OAM);
725 geneveh->critical = !!(info->key.tun_flags & TUNNEL_CRIT_OPT);
726 geneveh->rsvd1 = 0;
727 tunnel_id_to_vni(info->key.tun_id, geneveh->vni);
728 geneveh->proto_type = htons(ETH_P_TEB);
729 geneveh->rsvd2 = 0;
730
731 if (info->key.tun_flags & TUNNEL_GENEVE_OPT)
732 ip_tunnel_info_opts_get(geneveh->options, info);
733}
734
735static int geneve_build_skb(struct dst_entry *dst, struct sk_buff *skb,
736 const struct ip_tunnel_info *info,
737 bool xnet, int ip_hdr_len)
738{
739 bool udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
740 struct genevehdr *gnvh;
741 int min_headroom;
742 int err;
743
744 skb_reset_mac_header(skb);
745 skb_scrub_packet(skb, xnet);
746
747 min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len +
748 GENEVE_BASE_HLEN + info->options_len + ip_hdr_len;
749 err = skb_cow_head(skb, min_headroom);
750 if (unlikely(err))
751 goto free_dst;
752
753 err = udp_tunnel_handle_offloads(skb, udp_sum);
754 if (err)
755 goto free_dst;
756
757 gnvh = __skb_push(skb, sizeof(*gnvh) + info->options_len);
758 geneve_build_header(gnvh, info);
759 skb_set_inner_protocol(skb, htons(ETH_P_TEB));
760 return 0;
761
762free_dst:
763 dst_release(dst);
764 return err;
765}
766
767static struct rtable *geneve_get_v4_rt(struct sk_buff *skb,
768 struct net_device *dev,
769 struct geneve_sock *gs4,
770 struct flowi4 *fl4,
771 const struct ip_tunnel_info *info,
772 __be16 dport, __be16 sport)
773{
774 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
775 struct geneve_dev *geneve = netdev_priv(dev);
776 struct dst_cache *dst_cache;
777 struct rtable *rt = NULL;
778 __u8 tos;
779
780 if (!gs4)
781 return ERR_PTR(-EIO);
782
783 memset(fl4, 0, sizeof(*fl4));
784 fl4->flowi4_mark = skb->mark;
785 fl4->flowi4_proto = IPPROTO_UDP;
786 fl4->daddr = info->key.u.ipv4.dst;
787 fl4->saddr = info->key.u.ipv4.src;
788 fl4->fl4_dport = dport;
789 fl4->fl4_sport = sport;
790
791 tos = info->key.tos;
792 if ((tos == 1) && !geneve->cfg.collect_md) {
793 tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb);
794 use_cache = false;
795 }
796 fl4->flowi4_tos = RT_TOS(tos);
797
798 dst_cache = (struct dst_cache *)&info->dst_cache;
799 if (use_cache) {
800 rt = dst_cache_get_ip4(dst_cache, &fl4->saddr);
801 if (rt)
802 return rt;
803 }
804 rt = ip_route_output_key(geneve->net, fl4);
805 if (IS_ERR(rt)) {
806 netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr);
807 return ERR_PTR(-ENETUNREACH);
808 }
809 if (rt->dst.dev == dev) {
810 netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr);
811 ip_rt_put(rt);
812 return ERR_PTR(-ELOOP);
813 }
814 if (use_cache)
815 dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr);
816 return rt;
817}
818
819#if IS_ENABLED(CONFIG_IPV6)
820static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb,
821 struct net_device *dev,
822 struct geneve_sock *gs6,
823 struct flowi6 *fl6,
824 const struct ip_tunnel_info *info,
825 __be16 dport, __be16 sport)
826{
827 bool use_cache = ip_tunnel_dst_cache_usable(skb, info);
828 struct geneve_dev *geneve = netdev_priv(dev);
829 struct dst_entry *dst = NULL;
830 struct dst_cache *dst_cache;
831 __u8 prio;
832
833 if (!gs6)
834 return ERR_PTR(-EIO);
835
836 memset(fl6, 0, sizeof(*fl6));
837 fl6->flowi6_mark = skb->mark;
838 fl6->flowi6_proto = IPPROTO_UDP;
839 fl6->daddr = info->key.u.ipv6.dst;
840 fl6->saddr = info->key.u.ipv6.src;
841 fl6->fl6_dport = dport;
842 fl6->fl6_sport = sport;
843
844 prio = info->key.tos;
845 if ((prio == 1) && !geneve->cfg.collect_md) {
846 prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb);
847 use_cache = false;
848 }
849
850 fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio),
851 info->key.label);
852 dst_cache = (struct dst_cache *)&info->dst_cache;
853 if (use_cache) {
854 dst = dst_cache_get_ip6(dst_cache, &fl6->saddr);
855 if (dst)
856 return dst;
857 }
858 dst = ipv6_stub->ipv6_dst_lookup_flow(geneve->net, gs6->sock->sk, fl6,
859 NULL);
860 if (IS_ERR(dst)) {
861 netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr);
862 return ERR_PTR(-ENETUNREACH);
863 }
864 if (dst->dev == dev) {
865 netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr);
866 dst_release(dst);
867 return ERR_PTR(-ELOOP);
868 }
869
870 if (use_cache)
871 dst_cache_set_ip6(dst_cache, dst, &fl6->saddr);
872 return dst;
873}
874#endif
875
876static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev,
877 struct geneve_dev *geneve,
878 const struct ip_tunnel_info *info)
879{
880 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
881 struct geneve_sock *gs4 = rcu_dereference(geneve->sock4);
882 const struct ip_tunnel_key *key = &info->key;
883 struct rtable *rt;
884 struct flowi4 fl4;
885 __u8 tos, ttl;
886 __be16 df = 0;
887 __be16 sport;
888 int err;
889
890 if (!pskb_inet_may_pull(skb))
891 return -EINVAL;
892
893 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
894 rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info,
895 geneve->cfg.info.key.tp_dst, sport);
896 if (IS_ERR(rt))
897 return PTR_ERR(rt);
898
899 err = skb_tunnel_check_pmtu(skb, &rt->dst,
900 GENEVE_IPV4_HLEN + info->options_len,
901 netif_is_any_bridge_port(dev));
902 if (err < 0) {
903 dst_release(&rt->dst);
904 return err;
905 } else if (err) {
906 struct ip_tunnel_info *info;
907
908 info = skb_tunnel_info(skb);
909 if (info) {
910 struct ip_tunnel_info *unclone;
911
912 unclone = skb_tunnel_info_unclone(skb);
913 if (unlikely(!unclone)) {
914 dst_release(&rt->dst);
915 return -ENOMEM;
916 }
917
918 unclone->key.u.ipv4.dst = fl4.saddr;
919 unclone->key.u.ipv4.src = fl4.daddr;
920 }
921
922 if (!pskb_may_pull(skb, ETH_HLEN)) {
923 dst_release(&rt->dst);
924 return -EINVAL;
925 }
926
927 skb->protocol = eth_type_trans(skb, geneve->dev);
928 netif_rx(skb);
929 dst_release(&rt->dst);
930 return -EMSGSIZE;
931 }
932
933 if (geneve->cfg.collect_md) {
934 tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
935 ttl = key->ttl;
936
937 df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
938 } else {
939 tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb);
940 if (geneve->cfg.ttl_inherit)
941 ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb);
942 else
943 ttl = key->ttl;
944 ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
945
946 if (geneve->cfg.df == GENEVE_DF_SET) {
947 df = htons(IP_DF);
948 } else if (geneve->cfg.df == GENEVE_DF_INHERIT) {
949 struct ethhdr *eth = eth_hdr(skb);
950
951 if (ntohs(eth->h_proto) == ETH_P_IPV6) {
952 df = htons(IP_DF);
953 } else if (ntohs(eth->h_proto) == ETH_P_IP) {
954 struct iphdr *iph = ip_hdr(skb);
955
956 if (iph->frag_off & htons(IP_DF))
957 df = htons(IP_DF);
958 }
959 }
960 }
961
962 err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr));
963 if (unlikely(err))
964 return err;
965
966 udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr,
967 tos, ttl, df, sport, geneve->cfg.info.key.tp_dst,
968 !net_eq(geneve->net, dev_net(geneve->dev)),
969 !(info->key.tun_flags & TUNNEL_CSUM));
970 return 0;
971}
972
973#if IS_ENABLED(CONFIG_IPV6)
974static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
975 struct geneve_dev *geneve,
976 const struct ip_tunnel_info *info)
977{
978 bool xnet = !net_eq(geneve->net, dev_net(geneve->dev));
979 struct geneve_sock *gs6 = rcu_dereference(geneve->sock6);
980 const struct ip_tunnel_key *key = &info->key;
981 struct dst_entry *dst = NULL;
982 struct flowi6 fl6;
983 __u8 prio, ttl;
984 __be16 sport;
985 int err;
986
987 if (!pskb_inet_may_pull(skb))
988 return -EINVAL;
989
990 sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);
991 dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info,
992 geneve->cfg.info.key.tp_dst, sport);
993 if (IS_ERR(dst))
994 return PTR_ERR(dst);
995
996 err = skb_tunnel_check_pmtu(skb, dst,
997 GENEVE_IPV6_HLEN + info->options_len,
998 netif_is_any_bridge_port(dev));
999 if (err < 0) {
1000 dst_release(dst);
1001 return err;
1002 } else if (err) {
1003 struct ip_tunnel_info *info = skb_tunnel_info(skb);
1004
1005 if (info) {
1006 struct ip_tunnel_info *unclone;
1007
1008 unclone = skb_tunnel_info_unclone(skb);
1009 if (unlikely(!unclone)) {
1010 dst_release(dst);
1011 return -ENOMEM;
1012 }
1013
1014 unclone->key.u.ipv6.dst = fl6.saddr;
1015 unclone->key.u.ipv6.src = fl6.daddr;
1016 }
1017
1018 if (!pskb_may_pull(skb, ETH_HLEN)) {
1019 dst_release(dst);
1020 return -EINVAL;
1021 }
1022
1023 skb->protocol = eth_type_trans(skb, geneve->dev);
1024 netif_rx(skb);
1025 dst_release(dst);
1026 return -EMSGSIZE;
1027 }
1028
1029 if (geneve->cfg.collect_md) {
1030 prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
1031 ttl = key->ttl;
1032 } else {
1033 prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel),
1034 ip_hdr(skb), skb);
1035 if (geneve->cfg.ttl_inherit)
1036 ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb);
1037 else
1038 ttl = key->ttl;
1039 ttl = ttl ? : ip6_dst_hoplimit(dst);
1040 }
1041 err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct ipv6hdr));
1042 if (unlikely(err))
1043 return err;
1044
1045 udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev,
1046 &fl6.saddr, &fl6.daddr, prio, ttl,
1047 info->key.label, sport, geneve->cfg.info.key.tp_dst,
1048 !(info->key.tun_flags & TUNNEL_CSUM));
1049 return 0;
1050}
1051#endif
1052
1053static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
1054{
1055 struct geneve_dev *geneve = netdev_priv(dev);
1056 struct ip_tunnel_info *info = NULL;
1057 int err;
1058
1059 if (geneve->cfg.collect_md) {
1060 info = skb_tunnel_info(skb);
1061 if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
1062 netdev_dbg(dev, "no tunnel metadata\n");
1063 dev_kfree_skb(skb);
1064 dev->stats.tx_dropped++;
1065 return NETDEV_TX_OK;
1066 }
1067 } else {
1068 info = &geneve->cfg.info;
1069 }
1070
1071 rcu_read_lock();
1072#if IS_ENABLED(CONFIG_IPV6)
1073 if (info->mode & IP_TUNNEL_INFO_IPV6)
1074 err = geneve6_xmit_skb(skb, dev, geneve, info);
1075 else
1076#endif
1077 err = geneve_xmit_skb(skb, dev, geneve, info);
1078 rcu_read_unlock();
1079
1080 if (likely(!err))
1081 return NETDEV_TX_OK;
1082
1083 if (err != -EMSGSIZE)
1084 dev_kfree_skb(skb);
1085
1086 if (err == -ELOOP)
1087 dev->stats.collisions++;
1088 else if (err == -ENETUNREACH)
1089 dev->stats.tx_carrier_errors++;
1090
1091 dev->stats.tx_errors++;
1092 return NETDEV_TX_OK;
1093}
1094
1095static int geneve_change_mtu(struct net_device *dev, int new_mtu)
1096{
1097 if (new_mtu > dev->max_mtu)
1098 new_mtu = dev->max_mtu;
1099 else if (new_mtu < dev->min_mtu)
1100 new_mtu = dev->min_mtu;
1101
1102 dev->mtu = new_mtu;
1103 return 0;
1104}
1105
1106static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
1107{
1108 struct ip_tunnel_info *info = skb_tunnel_info(skb);
1109 struct geneve_dev *geneve = netdev_priv(dev);
1110 __be16 sport;
1111
1112 if (ip_tunnel_info_af(info) == AF_INET) {
1113 struct rtable *rt;
1114 struct flowi4 fl4;
1115
1116 struct geneve_sock *gs4 = rcu_dereference(geneve->sock4);
1117 sport = udp_flow_src_port(geneve->net, skb,
1118 1, USHRT_MAX, true);
1119
1120 rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info,
1121 geneve->cfg.info.key.tp_dst, sport);
1122 if (IS_ERR(rt))
1123 return PTR_ERR(rt);
1124
1125 ip_rt_put(rt);
1126 info->key.u.ipv4.src = fl4.saddr;
1127#if IS_ENABLED(CONFIG_IPV6)
1128 } else if (ip_tunnel_info_af(info) == AF_INET6) {
1129 struct dst_entry *dst;
1130 struct flowi6 fl6;
1131
1132 struct geneve_sock *gs6 = rcu_dereference(geneve->sock6);
1133 sport = udp_flow_src_port(geneve->net, skb,
1134 1, USHRT_MAX, true);
1135
1136 dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info,
1137 geneve->cfg.info.key.tp_dst, sport);
1138 if (IS_ERR(dst))
1139 return PTR_ERR(dst);
1140
1141 dst_release(dst);
1142 info->key.u.ipv6.src = fl6.saddr;
1143#endif
1144 } else {
1145 return -EINVAL;
1146 }
1147
1148 info->key.tp_src = sport;
1149 info->key.tp_dst = geneve->cfg.info.key.tp_dst;
1150 return 0;
1151}
1152
1153static const struct net_device_ops geneve_netdev_ops = {
1154 .ndo_init = geneve_init,
1155 .ndo_uninit = geneve_uninit,
1156 .ndo_open = geneve_open,
1157 .ndo_stop = geneve_stop,
1158 .ndo_start_xmit = geneve_xmit,
1159 .ndo_get_stats64 = dev_get_tstats64,
1160 .ndo_change_mtu = geneve_change_mtu,
1161 .ndo_validate_addr = eth_validate_addr,
1162 .ndo_set_mac_address = eth_mac_addr,
1163 .ndo_fill_metadata_dst = geneve_fill_metadata_dst,
1164};
1165
1166static void geneve_get_drvinfo(struct net_device *dev,
1167 struct ethtool_drvinfo *drvinfo)
1168{
1169 strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version));
1170 strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver));
1171}
1172
1173static const struct ethtool_ops geneve_ethtool_ops = {
1174 .get_drvinfo = geneve_get_drvinfo,
1175 .get_link = ethtool_op_get_link,
1176};
1177
1178
1179static struct device_type geneve_type = {
1180 .name = "geneve",
1181};
1182
1183
1184
1185
1186
1187static void geneve_offload_rx_ports(struct net_device *dev, bool push)
1188{
1189 struct net *net = dev_net(dev);
1190 struct geneve_net *gn = net_generic(net, geneve_net_id);
1191 struct geneve_sock *gs;
1192
1193 rcu_read_lock();
1194 list_for_each_entry_rcu(gs, &gn->sock_list, list) {
1195 if (push) {
1196 udp_tunnel_push_rx_port(dev, gs->sock,
1197 UDP_TUNNEL_TYPE_GENEVE);
1198 } else {
1199 udp_tunnel_drop_rx_port(dev, gs->sock,
1200 UDP_TUNNEL_TYPE_GENEVE);
1201 }
1202 }
1203 rcu_read_unlock();
1204}
1205
1206
1207static void geneve_setup(struct net_device *dev)
1208{
1209 ether_setup(dev);
1210
1211 dev->netdev_ops = &geneve_netdev_ops;
1212 dev->ethtool_ops = &geneve_ethtool_ops;
1213 dev->needs_free_netdev = true;
1214
1215 SET_NETDEV_DEVTYPE(dev, &geneve_type);
1216
1217 dev->features |= NETIF_F_LLTX;
1218 dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST;
1219 dev->features |= NETIF_F_RXCSUM;
1220 dev->features |= NETIF_F_GSO_SOFTWARE;
1221
1222 dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST;
1223 dev->hw_features |= NETIF_F_RXCSUM;
1224 dev->hw_features |= NETIF_F_GSO_SOFTWARE;
1225
1226
1227 dev->min_mtu = ETH_MIN_MTU;
1228
1229
1230
1231
1232 dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len;
1233
1234 netif_keep_dst(dev);
1235 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1236 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
1237 eth_hw_addr_random(dev);
1238}
1239
1240static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = {
1241 [IFLA_GENEVE_ID] = { .type = NLA_U32 },
1242 [IFLA_GENEVE_REMOTE] = { .len = sizeof_field(struct iphdr, daddr) },
1243 [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) },
1244 [IFLA_GENEVE_TTL] = { .type = NLA_U8 },
1245 [IFLA_GENEVE_TOS] = { .type = NLA_U8 },
1246 [IFLA_GENEVE_LABEL] = { .type = NLA_U32 },
1247 [IFLA_GENEVE_PORT] = { .type = NLA_U16 },
1248 [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG },
1249 [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 },
1250 [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 },
1251 [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 },
1252 [IFLA_GENEVE_TTL_INHERIT] = { .type = NLA_U8 },
1253 [IFLA_GENEVE_DF] = { .type = NLA_U8 },
1254};
1255
1256static int geneve_validate(struct nlattr *tb[], struct nlattr *data[],
1257 struct netlink_ext_ack *extack)
1258{
1259 if (tb[IFLA_ADDRESS]) {
1260 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
1261 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
1262 "Provided link layer address is not Ethernet");
1263 return -EINVAL;
1264 }
1265
1266 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
1267 NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS],
1268 "Provided Ethernet address is not unicast");
1269 return -EADDRNOTAVAIL;
1270 }
1271 }
1272
1273 if (!data) {
1274 NL_SET_ERR_MSG(extack,
1275 "Not enough attributes provided to perform the operation");
1276 return -EINVAL;
1277 }
1278
1279 if (data[IFLA_GENEVE_ID]) {
1280 __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1281
1282 if (vni >= GENEVE_N_VID) {
1283 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_ID],
1284 "Geneve ID must be lower than 16777216");
1285 return -ERANGE;
1286 }
1287 }
1288
1289 if (data[IFLA_GENEVE_DF]) {
1290 enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]);
1291
1292 if (df < 0 || df > GENEVE_DF_MAX) {
1293 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_DF],
1294 "Invalid DF attribute");
1295 return -EINVAL;
1296 }
1297 }
1298
1299 return 0;
1300}
1301
1302static struct geneve_dev *geneve_find_dev(struct geneve_net *gn,
1303 const struct ip_tunnel_info *info,
1304 bool *tun_on_same_port,
1305 bool *tun_collect_md)
1306{
1307 struct geneve_dev *geneve, *t = NULL;
1308
1309 *tun_on_same_port = false;
1310 *tun_collect_md = false;
1311 list_for_each_entry(geneve, &gn->geneve_list, next) {
1312 if (info->key.tp_dst == geneve->cfg.info.key.tp_dst) {
1313 *tun_collect_md = geneve->cfg.collect_md;
1314 *tun_on_same_port = true;
1315 }
1316 if (info->key.tun_id == geneve->cfg.info.key.tun_id &&
1317 info->key.tp_dst == geneve->cfg.info.key.tp_dst &&
1318 !memcmp(&info->key.u, &geneve->cfg.info.key.u, sizeof(info->key.u)))
1319 t = geneve;
1320 }
1321 return t;
1322}
1323
1324static bool is_tnl_info_zero(const struct ip_tunnel_info *info)
1325{
1326 return !(info->key.tun_id || info->key.tun_flags || info->key.tos ||
1327 info->key.ttl || info->key.label || info->key.tp_src ||
1328 memchr_inv(&info->key.u, 0, sizeof(info->key.u)));
1329}
1330
1331static bool geneve_dst_addr_equal(struct ip_tunnel_info *a,
1332 struct ip_tunnel_info *b)
1333{
1334 if (ip_tunnel_info_af(a) == AF_INET)
1335 return a->key.u.ipv4.dst == b->key.u.ipv4.dst;
1336 else
1337 return ipv6_addr_equal(&a->key.u.ipv6.dst, &b->key.u.ipv6.dst);
1338}
1339
1340static int geneve_configure(struct net *net, struct net_device *dev,
1341 struct netlink_ext_ack *extack,
1342 const struct geneve_config *cfg)
1343{
1344 struct geneve_net *gn = net_generic(net, geneve_net_id);
1345 struct geneve_dev *t, *geneve = netdev_priv(dev);
1346 const struct ip_tunnel_info *info = &cfg->info;
1347 bool tun_collect_md, tun_on_same_port;
1348 int err, encap_len;
1349
1350 if (cfg->collect_md && !is_tnl_info_zero(info)) {
1351 NL_SET_ERR_MSG(extack,
1352 "Device is externally controlled, so attributes (VNI, Port, and so on) must not be specified");
1353 return -EINVAL;
1354 }
1355
1356 geneve->net = net;
1357 geneve->dev = dev;
1358
1359 t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md);
1360 if (t)
1361 return -EBUSY;
1362
1363
1364 encap_len = GENEVE_BASE_HLEN + ETH_HLEN;
1365 if (!cfg->collect_md && ip_tunnel_info_af(info) == AF_INET) {
1366 encap_len += sizeof(struct iphdr);
1367 dev->max_mtu -= sizeof(struct iphdr);
1368 } else {
1369 encap_len += sizeof(struct ipv6hdr);
1370 dev->max_mtu -= sizeof(struct ipv6hdr);
1371 }
1372 dev->needed_headroom = encap_len + ETH_HLEN;
1373
1374 if (cfg->collect_md) {
1375 if (tun_on_same_port) {
1376 NL_SET_ERR_MSG(extack,
1377 "There can be only one externally controlled device on a destination port");
1378 return -EPERM;
1379 }
1380 } else {
1381 if (tun_collect_md) {
1382 NL_SET_ERR_MSG(extack,
1383 "There already exists an externally controlled device on this destination port");
1384 return -EPERM;
1385 }
1386 }
1387
1388 dst_cache_reset(&geneve->cfg.info.dst_cache);
1389 memcpy(&geneve->cfg, cfg, sizeof(*cfg));
1390
1391 err = register_netdevice(dev);
1392 if (err)
1393 return err;
1394
1395 list_add(&geneve->next, &gn->geneve_list);
1396 return 0;
1397}
1398
1399static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port)
1400{
1401 memset(info, 0, sizeof(*info));
1402 info->key.tp_dst = htons(dst_port);
1403}
1404
1405static int geneve_nl2info(struct nlattr *tb[], struct nlattr *data[],
1406 struct netlink_ext_ack *extack,
1407 struct geneve_config *cfg, bool changelink)
1408{
1409 struct ip_tunnel_info *info = &cfg->info;
1410 int attrtype;
1411
1412 if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) {
1413 NL_SET_ERR_MSG(extack,
1414 "Cannot specify both IPv4 and IPv6 Remote addresses");
1415 return -EINVAL;
1416 }
1417
1418 if (data[IFLA_GENEVE_REMOTE]) {
1419 if (changelink && (ip_tunnel_info_af(info) == AF_INET6)) {
1420 attrtype = IFLA_GENEVE_REMOTE;
1421 goto change_notsup;
1422 }
1423
1424 info->key.u.ipv4.dst =
1425 nla_get_in_addr(data[IFLA_GENEVE_REMOTE]);
1426
1427 if (ipv4_is_multicast(info->key.u.ipv4.dst)) {
1428 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE],
1429 "Remote IPv4 address cannot be Multicast");
1430 return -EINVAL;
1431 }
1432 }
1433
1434 if (data[IFLA_GENEVE_REMOTE6]) {
1435#if IS_ENABLED(CONFIG_IPV6)
1436 if (changelink && (ip_tunnel_info_af(info) == AF_INET)) {
1437 attrtype = IFLA_GENEVE_REMOTE6;
1438 goto change_notsup;
1439 }
1440
1441 info->mode = IP_TUNNEL_INFO_IPV6;
1442 info->key.u.ipv6.dst =
1443 nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]);
1444
1445 if (ipv6_addr_type(&info->key.u.ipv6.dst) &
1446 IPV6_ADDR_LINKLOCAL) {
1447 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6],
1448 "Remote IPv6 address cannot be link-local");
1449 return -EINVAL;
1450 }
1451 if (ipv6_addr_is_multicast(&info->key.u.ipv6.dst)) {
1452 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6],
1453 "Remote IPv6 address cannot be Multicast");
1454 return -EINVAL;
1455 }
1456 info->key.tun_flags |= TUNNEL_CSUM;
1457 cfg->use_udp6_rx_checksums = true;
1458#else
1459 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6],
1460 "IPv6 support not enabled in the kernel");
1461 return -EPFNOSUPPORT;
1462#endif
1463 }
1464
1465 if (data[IFLA_GENEVE_ID]) {
1466 __u32 vni;
1467 __u8 tvni[3];
1468 __be64 tunid;
1469
1470 vni = nla_get_u32(data[IFLA_GENEVE_ID]);
1471 tvni[0] = (vni & 0x00ff0000) >> 16;
1472 tvni[1] = (vni & 0x0000ff00) >> 8;
1473 tvni[2] = vni & 0x000000ff;
1474
1475 tunid = vni_to_tunnel_id(tvni);
1476 if (changelink && (tunid != info->key.tun_id)) {
1477 attrtype = IFLA_GENEVE_ID;
1478 goto change_notsup;
1479 }
1480 info->key.tun_id = tunid;
1481 }
1482
1483 if (data[IFLA_GENEVE_TTL_INHERIT]) {
1484 if (nla_get_u8(data[IFLA_GENEVE_TTL_INHERIT]))
1485 cfg->ttl_inherit = true;
1486 else
1487 cfg->ttl_inherit = false;
1488 } else if (data[IFLA_GENEVE_TTL]) {
1489 info->key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]);
1490 cfg->ttl_inherit = false;
1491 }
1492
1493 if (data[IFLA_GENEVE_TOS])
1494 info->key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]);
1495
1496 if (data[IFLA_GENEVE_DF])
1497 cfg->df = nla_get_u8(data[IFLA_GENEVE_DF]);
1498
1499 if (data[IFLA_GENEVE_LABEL]) {
1500 info->key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) &
1501 IPV6_FLOWLABEL_MASK;
1502 if (info->key.label && (!(info->mode & IP_TUNNEL_INFO_IPV6))) {
1503 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_LABEL],
1504 "Label attribute only applies for IPv6 Geneve devices");
1505 return -EINVAL;
1506 }
1507 }
1508
1509 if (data[IFLA_GENEVE_PORT]) {
1510 if (changelink) {
1511 attrtype = IFLA_GENEVE_PORT;
1512 goto change_notsup;
1513 }
1514 info->key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]);
1515 }
1516
1517 if (data[IFLA_GENEVE_COLLECT_METADATA]) {
1518 if (changelink) {
1519 attrtype = IFLA_GENEVE_COLLECT_METADATA;
1520 goto change_notsup;
1521 }
1522 cfg->collect_md = true;
1523 }
1524
1525 if (data[IFLA_GENEVE_UDP_CSUM]) {
1526 if (changelink) {
1527 attrtype = IFLA_GENEVE_UDP_CSUM;
1528 goto change_notsup;
1529 }
1530 if (nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
1531 info->key.tun_flags |= TUNNEL_CSUM;
1532 }
1533
1534 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) {
1535#if IS_ENABLED(CONFIG_IPV6)
1536 if (changelink) {
1537 attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_TX;
1538 goto change_notsup;
1539 }
1540 if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
1541 info->key.tun_flags &= ~TUNNEL_CSUM;
1542#else
1543 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX],
1544 "IPv6 support not enabled in the kernel");
1545 return -EPFNOSUPPORT;
1546#endif
1547 }
1548
1549 if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) {
1550#if IS_ENABLED(CONFIG_IPV6)
1551 if (changelink) {
1552 attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_RX;
1553 goto change_notsup;
1554 }
1555 if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
1556 cfg->use_udp6_rx_checksums = false;
1557#else
1558 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX],
1559 "IPv6 support not enabled in the kernel");
1560 return -EPFNOSUPPORT;
1561#endif
1562 }
1563
1564 return 0;
1565change_notsup:
1566 NL_SET_ERR_MSG_ATTR(extack, data[attrtype],
1567 "Changing VNI, Port, endpoint IP address family, external, and UDP checksum attributes are not supported");
1568 return -EOPNOTSUPP;
1569}
1570
1571static void geneve_link_config(struct net_device *dev,
1572 struct ip_tunnel_info *info, struct nlattr *tb[])
1573{
1574 struct geneve_dev *geneve = netdev_priv(dev);
1575 int ldev_mtu = 0;
1576
1577 if (tb[IFLA_MTU]) {
1578 geneve_change_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1579 return;
1580 }
1581
1582 switch (ip_tunnel_info_af(info)) {
1583 case AF_INET: {
1584 struct flowi4 fl4 = { .daddr = info->key.u.ipv4.dst };
1585 struct rtable *rt = ip_route_output_key(geneve->net, &fl4);
1586
1587 if (!IS_ERR(rt) && rt->dst.dev) {
1588 ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV4_HLEN;
1589 ip_rt_put(rt);
1590 }
1591 break;
1592 }
1593#if IS_ENABLED(CONFIG_IPV6)
1594 case AF_INET6: {
1595 struct rt6_info *rt;
1596
1597 if (!__in6_dev_get(dev))
1598 break;
1599
1600 rt = rt6_lookup(geneve->net, &info->key.u.ipv6.dst, NULL, 0,
1601 NULL, 0);
1602
1603 if (rt && rt->dst.dev)
1604 ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV6_HLEN;
1605 ip6_rt_put(rt);
1606 break;
1607 }
1608#endif
1609 }
1610
1611 if (ldev_mtu <= 0)
1612 return;
1613
1614 geneve_change_mtu(dev, ldev_mtu - info->options_len);
1615}
1616
1617static int geneve_newlink(struct net *net, struct net_device *dev,
1618 struct nlattr *tb[], struct nlattr *data[],
1619 struct netlink_ext_ack *extack)
1620{
1621 struct geneve_config cfg = {
1622 .df = GENEVE_DF_UNSET,
1623 .use_udp6_rx_checksums = false,
1624 .ttl_inherit = false,
1625 .collect_md = false,
1626 };
1627 int err;
1628
1629 init_tnl_info(&cfg.info, GENEVE_UDP_PORT);
1630 err = geneve_nl2info(tb, data, extack, &cfg, false);
1631 if (err)
1632 return err;
1633
1634 err = geneve_configure(net, dev, extack, &cfg);
1635 if (err)
1636 return err;
1637
1638 geneve_link_config(dev, &cfg.info, tb);
1639
1640 return 0;
1641}
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655static void geneve_quiesce(struct geneve_dev *geneve, struct geneve_sock **gs4,
1656 struct geneve_sock **gs6)
1657{
1658 *gs4 = rtnl_dereference(geneve->sock4);
1659 rcu_assign_pointer(geneve->sock4, NULL);
1660 if (*gs4)
1661 rcu_assign_sk_user_data((*gs4)->sock->sk, NULL);
1662#if IS_ENABLED(CONFIG_IPV6)
1663 *gs6 = rtnl_dereference(geneve->sock6);
1664 rcu_assign_pointer(geneve->sock6, NULL);
1665 if (*gs6)
1666 rcu_assign_sk_user_data((*gs6)->sock->sk, NULL);
1667#else
1668 *gs6 = NULL;
1669#endif
1670 synchronize_net();
1671}
1672
1673
1674static void geneve_unquiesce(struct geneve_dev *geneve, struct geneve_sock *gs4,
1675 struct geneve_sock __maybe_unused *gs6)
1676{
1677 rcu_assign_pointer(geneve->sock4, gs4);
1678 if (gs4)
1679 rcu_assign_sk_user_data(gs4->sock->sk, gs4);
1680#if IS_ENABLED(CONFIG_IPV6)
1681 rcu_assign_pointer(geneve->sock6, gs6);
1682 if (gs6)
1683 rcu_assign_sk_user_data(gs6->sock->sk, gs6);
1684#endif
1685 synchronize_net();
1686}
1687
1688static int geneve_changelink(struct net_device *dev, struct nlattr *tb[],
1689 struct nlattr *data[],
1690 struct netlink_ext_ack *extack)
1691{
1692 struct geneve_dev *geneve = netdev_priv(dev);
1693 struct geneve_sock *gs4, *gs6;
1694 struct geneve_config cfg;
1695 int err;
1696
1697
1698
1699
1700 if (geneve->cfg.collect_md)
1701 return -EOPNOTSUPP;
1702
1703
1704 memcpy(&cfg, &geneve->cfg, sizeof(cfg));
1705 err = geneve_nl2info(tb, data, extack, &cfg, true);
1706 if (err)
1707 return err;
1708
1709 if (!geneve_dst_addr_equal(&geneve->cfg.info, &cfg.info)) {
1710 dst_cache_reset(&cfg.info.dst_cache);
1711 geneve_link_config(dev, &cfg.info, tb);
1712 }
1713
1714 geneve_quiesce(geneve, &gs4, &gs6);
1715 memcpy(&geneve->cfg, &cfg, sizeof(cfg));
1716 geneve_unquiesce(geneve, gs4, gs6);
1717
1718 return 0;
1719}
1720
1721static void geneve_dellink(struct net_device *dev, struct list_head *head)
1722{
1723 struct geneve_dev *geneve = netdev_priv(dev);
1724
1725 list_del(&geneve->next);
1726 unregister_netdevice_queue(dev, head);
1727}
1728
1729static size_t geneve_get_size(const struct net_device *dev)
1730{
1731 return nla_total_size(sizeof(__u32)) +
1732 nla_total_size(sizeof(struct in6_addr)) +
1733 nla_total_size(sizeof(__u8)) +
1734 nla_total_size(sizeof(__u8)) +
1735 nla_total_size(sizeof(__u8)) +
1736 nla_total_size(sizeof(__be32)) +
1737 nla_total_size(sizeof(__be16)) +
1738 nla_total_size(0) +
1739 nla_total_size(sizeof(__u8)) +
1740 nla_total_size(sizeof(__u8)) +
1741 nla_total_size(sizeof(__u8)) +
1742 nla_total_size(sizeof(__u8)) +
1743 0;
1744}
1745
1746static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev)
1747{
1748 struct geneve_dev *geneve = netdev_priv(dev);
1749 struct ip_tunnel_info *info = &geneve->cfg.info;
1750 bool ttl_inherit = geneve->cfg.ttl_inherit;
1751 bool metadata = geneve->cfg.collect_md;
1752 __u8 tmp_vni[3];
1753 __u32 vni;
1754
1755 tunnel_id_to_vni(info->key.tun_id, tmp_vni);
1756 vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2];
1757 if (nla_put_u32(skb, IFLA_GENEVE_ID, vni))
1758 goto nla_put_failure;
1759
1760 if (!metadata && ip_tunnel_info_af(info) == AF_INET) {
1761 if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE,
1762 info->key.u.ipv4.dst))
1763 goto nla_put_failure;
1764 if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM,
1765 !!(info->key.tun_flags & TUNNEL_CSUM)))
1766 goto nla_put_failure;
1767
1768#if IS_ENABLED(CONFIG_IPV6)
1769 } else if (!metadata) {
1770 if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6,
1771 &info->key.u.ipv6.dst))
1772 goto nla_put_failure;
1773 if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
1774 !(info->key.tun_flags & TUNNEL_CSUM)))
1775 goto nla_put_failure;
1776#endif
1777 }
1778
1779 if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) ||
1780 nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) ||
1781 nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label))
1782 goto nla_put_failure;
1783
1784 if (nla_put_u8(skb, IFLA_GENEVE_DF, geneve->cfg.df))
1785 goto nla_put_failure;
1786
1787 if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst))
1788 goto nla_put_failure;
1789
1790 if (metadata && nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA))
1791 goto nla_put_failure;
1792
1793#if IS_ENABLED(CONFIG_IPV6)
1794 if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
1795 !geneve->cfg.use_udp6_rx_checksums))
1796 goto nla_put_failure;
1797#endif
1798
1799 if (nla_put_u8(skb, IFLA_GENEVE_TTL_INHERIT, ttl_inherit))
1800 goto nla_put_failure;
1801
1802 return 0;
1803
1804nla_put_failure:
1805 return -EMSGSIZE;
1806}
1807
1808static struct rtnl_link_ops geneve_link_ops __read_mostly = {
1809 .kind = "geneve",
1810 .maxtype = IFLA_GENEVE_MAX,
1811 .policy = geneve_policy,
1812 .priv_size = sizeof(struct geneve_dev),
1813 .setup = geneve_setup,
1814 .validate = geneve_validate,
1815 .newlink = geneve_newlink,
1816 .changelink = geneve_changelink,
1817 .dellink = geneve_dellink,
1818 .get_size = geneve_get_size,
1819 .fill_info = geneve_fill_info,
1820};
1821
1822struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
1823 u8 name_assign_type, u16 dst_port)
1824{
1825 struct nlattr *tb[IFLA_MAX + 1];
1826 struct net_device *dev;
1827 LIST_HEAD(list_kill);
1828 int err;
1829 struct geneve_config cfg = {
1830 .df = GENEVE_DF_UNSET,
1831 .use_udp6_rx_checksums = true,
1832 .ttl_inherit = false,
1833 .collect_md = true,
1834 };
1835
1836 memset(tb, 0, sizeof(tb));
1837 dev = rtnl_create_link(net, name, name_assign_type,
1838 &geneve_link_ops, tb, NULL);
1839 if (IS_ERR(dev))
1840 return dev;
1841
1842 init_tnl_info(&cfg.info, dst_port);
1843 err = geneve_configure(net, dev, NULL, &cfg);
1844 if (err) {
1845 free_netdev(dev);
1846 return ERR_PTR(err);
1847 }
1848
1849
1850
1851
1852 err = geneve_change_mtu(dev, IP_MAX_MTU);
1853 if (err)
1854 goto err;
1855
1856 err = rtnl_configure_link(dev, NULL);
1857 if (err < 0)
1858 goto err;
1859
1860 return dev;
1861err:
1862 geneve_dellink(dev, &list_kill);
1863 unregister_netdevice_many(&list_kill);
1864 return ERR_PTR(err);
1865}
1866EXPORT_SYMBOL_GPL(geneve_dev_create_fb);
1867
1868static int geneve_netdevice_event(struct notifier_block *unused,
1869 unsigned long event, void *ptr)
1870{
1871 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1872
1873 if (event == NETDEV_UDP_TUNNEL_PUSH_INFO)
1874 geneve_offload_rx_ports(dev, true);
1875 else if (event == NETDEV_UDP_TUNNEL_DROP_INFO)
1876 geneve_offload_rx_ports(dev, false);
1877
1878 return NOTIFY_DONE;
1879}
1880
1881static struct notifier_block geneve_notifier_block __read_mostly = {
1882 .notifier_call = geneve_netdevice_event,
1883};
1884
1885static __net_init int geneve_init_net(struct net *net)
1886{
1887 struct geneve_net *gn = net_generic(net, geneve_net_id);
1888
1889 INIT_LIST_HEAD(&gn->geneve_list);
1890 INIT_LIST_HEAD(&gn->sock_list);
1891 return 0;
1892}
1893
1894static void geneve_destroy_tunnels(struct net *net, struct list_head *head)
1895{
1896 struct geneve_net *gn = net_generic(net, geneve_net_id);
1897 struct geneve_dev *geneve, *next;
1898 struct net_device *dev, *aux;
1899
1900
1901 for_each_netdev_safe(net, dev, aux)
1902 if (dev->rtnl_link_ops == &geneve_link_ops)
1903 unregister_netdevice_queue(dev, head);
1904
1905
1906 list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) {
1907
1908
1909
1910 if (!net_eq(dev_net(geneve->dev), net))
1911 unregister_netdevice_queue(geneve->dev, head);
1912 }
1913}
1914
1915static void __net_exit geneve_exit_batch_net(struct list_head *net_list)
1916{
1917 struct net *net;
1918 LIST_HEAD(list);
1919
1920 rtnl_lock();
1921 list_for_each_entry(net, net_list, exit_list)
1922 geneve_destroy_tunnels(net, &list);
1923
1924
1925 unregister_netdevice_many(&list);
1926 rtnl_unlock();
1927
1928 list_for_each_entry(net, net_list, exit_list) {
1929 const struct geneve_net *gn = net_generic(net, geneve_net_id);
1930
1931 WARN_ON_ONCE(!list_empty(&gn->sock_list));
1932 }
1933}
1934
1935static struct pernet_operations geneve_net_ops = {
1936 .init = geneve_init_net,
1937 .exit_batch = geneve_exit_batch_net,
1938 .id = &geneve_net_id,
1939 .size = sizeof(struct geneve_net),
1940};
1941
1942static int __init geneve_init_module(void)
1943{
1944 int rc;
1945
1946 rc = register_pernet_subsys(&geneve_net_ops);
1947 if (rc)
1948 goto out1;
1949
1950 rc = register_netdevice_notifier(&geneve_notifier_block);
1951 if (rc)
1952 goto out2;
1953
1954 rc = rtnl_link_register(&geneve_link_ops);
1955 if (rc)
1956 goto out3;
1957
1958 return 0;
1959out3:
1960 unregister_netdevice_notifier(&geneve_notifier_block);
1961out2:
1962 unregister_pernet_subsys(&geneve_net_ops);
1963out1:
1964 return rc;
1965}
1966late_initcall(geneve_init_module);
1967
1968static void __exit geneve_cleanup_module(void)
1969{
1970 rtnl_link_unregister(&geneve_link_ops);
1971 unregister_netdevice_notifier(&geneve_notifier_block);
1972 unregister_pernet_subsys(&geneve_net_ops);
1973}
1974module_exit(geneve_cleanup_module);
1975
1976MODULE_LICENSE("GPL");
1977MODULE_VERSION(GENEVE_NETDEV_VER);
1978MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
1979MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic");
1980MODULE_ALIAS_RTNL_LINK("geneve");
1981
